U.S. patent application number 16/594018 was filed with the patent office on 2020-01-30 for pulp-molded container structure and molding device and method thereof.
The applicant listed for this patent is Hsing Chung Molded Pulp Co., Ltd.. Invention is credited to An-Jen CHANG, Lien-Ho CHANG, Ming-Chih LIN, Ting-Ru LIN, Yi-Ming WU.
Application Number | 20200032460 16/594018 |
Document ID | / |
Family ID | 69179138 |
Filed Date | 2020-01-30 |
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United States Patent
Application |
20200032460 |
Kind Code |
A1 |
LIN; Ming-Chih ; et
al. |
January 30, 2020 |
Pulp-molded container structure and molding device and method
thereof
Abstract
The present invention relates to a pulp-molded container
structure and molding device and method thereof. The molding device
comprises a first container molding die and a second container
molding die. The first container molding die comprises a snap-fit
molding part and a rim molding part, so that a snap-fit section of
the pulp-molded container structure and a circular rim section at
the edge of the pulp-molded container structure are formed when the
first container molding die and the second container molding die
are coupled with each other. The rim section and the snap-fit
section are used to strengthen the combination of the pulp-molded
container structure and an external container, so that the
combination is more stable.
Inventors: |
LIN; Ming-Chih; (Yi-Lan
County, TW) ; CHANG; Lien-Ho; (Yi-Lan County, TW)
; CHANG; An-Jen; (Yi-Lan County, TW) ; LIN;
Ting-Ru; (Yi-Lan County, TW) ; WU; Yi-Ming;
(Yi-Lan County, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Hsing Chung Molded Pulp Co., Ltd. |
Yi-Lan County |
|
TW |
|
|
Family ID: |
69179138 |
Appl. No.: |
16/594018 |
Filed: |
October 5, 2019 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
15595893 |
May 15, 2017 |
|
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|
16594018 |
|
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B65D 43/0208 20130101;
B65D 2543/0074 20130101; B65D 2543/00092 20130101; B65D 2543/00555
20130101; B65D 2543/00268 20130101; B65D 2543/00796 20130101; D21J
3/00 20130101; B65D 2543/00685 20130101; B65D 2543/00027 20130101;
B65D 2543/00629 20130101 |
International
Class: |
D21J 3/00 20060101
D21J003/00; B65D 43/02 20060101 B65D043/02 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 23, 2016 |
TW |
105130752 |
Claims
1. A molding device of a pulp-molded container structure for
manufacturing of the pulp-molded container structure comprises: a
first container molding die comprising a first molding unit for
shaping of a complete interior profile of the pulp-molded container
structure, wherein the first molding unit has a center molding part
for shaping of the central section of the pulp-molded container
structure and a rim molding part for shaping of the rim section of
the pulp-molded container structure and the rim molding part has an
annular snap-fit molding part situated at an outer edge and at one
side far away from the center molding part for shaping of the
snap-fit section of the pulp-molded container structure; and a
second container molding die, comprising a second molding unit for
shaping of a complete exterior profile of the pulp-molded container
structure and being driven to fit into the first container molding
die for shaping of the pulp-molded container structure in 0.5 mm to
1.2 mm thickness between the second container molding die and the
first container molding die.
2. The molding device of a pulp-molded container structure of claim
1, wherein the first molding unit optionally comprises a plurality
of pore channels penetrating the first molding unit inside and each
of the pore channels creating suction during shaping of the
pulp-molded container structure, for draining excessive water in
pulp slurry, or regulating pressure in a pulp molding process.
3. The molding device of a pulp-molded container structure of claim
1, wherein the second molding unit optionally comprises a plurality
of pore channels penetrating the second molding unit inside and
each of the pore channels being used to regulate pressure during
shaping of the pulp-molded container structure or create suction by
the pulp-molded container structure being sucked and separated from
the first container molding die.
4. The molding device of a pulp-molded container structure of claim
1, wherein the first container molding die is provided with a
strainer adhered to the first molding unit and immersed in paper
pulp for construction of a first container pulp-sucking and molding
die and the strainer comprises a plurality of fine meshes to filter
paper pulp and keep pulp fibers attached and paper pulp deposited
on the first container pulp-sucking and molding die, covered over
the first molding unit, and correspondingly applied to the second
container molding die for shaping of the pulp-molded container
structure by the second molding unit in a second container
pulp-sucking and molding die.
5. The molding device of a pulp-molded container structure of claim
1, wherein the second container molding die is made with thermally
conductive materials for heating and drying paper pulp and shaping
the pulp-molded container structure; and the first container
molding die is made with thermal conductive materials for heating
and drying paper pulp and shaping the pulp-molded container
structure.
6. A molding device of a pulp-molded container structure for
manufacturing of the pulp-molded container structure comprises: a
first container molding die comprising a first molding unit for
shaping of a complete exterior profile of the pulp-molded container
structure; a second container molding die comprising a second
molding unit for shaping of a complete interior profile of the
pulp-molded container structure, wherein the second molding unit
has a center molding part for shaping of the central section of the
pulp-molded container structure and a rim molding part for shaping
of the rim section of the pulp-molded container structure, and the
rim molding part has an annular snap-fit molding part situated at
an outer edge and one side far away from the center molding part
for shaping of the snap-fit section of the pulp-molded container
structure; wherein the second container molding die and the first
container molding die are coupled with each other for shaping of
the pulp-molded container structure in 0.5 mm to 1.2 mm thickness
with paper pulp held between the second container molding die and
the first container molding die.
7. The molding device of a pulp-molded container structure of claim
6, wherein the first molding unit optionally comprises a plurality
of pore channels penetrating the first molding unit inside and each
of the pore channels creating suction during shaping of the
pulp-molded container structure, for draining excessive water in
pulp slurry, or regulating pressure in a pulp molding process.
8. The molding device of a pulp-molded container structure of claim
6, wherein the second molding unit optionally comprises a plurality
of pore channels penetrating the second molding unit inside and
each of the pore channels being used to regulate pressure during
shaping of the pulp-molded container structure or create suction by
which the pulp-molded container structure being sucked and
separated from the first container molding die.
9. The molding device of a pulp-molded container structure of claim
6, wherein the first container molding die is provided with a
strainer adhered to the first molding unit and immersed in paper
pulp for construction of a first container pulp-sucking and molding
die and the strainer comprises a plurality of fine meshes to filter
paper pulp and keep pulp fibers attached and paper pulp deposited
on the first container pulp-sucking and molding die, covered over
the first molding unit, and correspondingly applied to the second
container molding die for shaping the pulp-molded container
structure by the second molding unit in a second container
pulp-sucking and molding die.
10. The molding device of a pulp-molded container structure of
claim 6, wherein the second container molding die is made with
thermal conductive materials for heating and drying paper pulp and
shaping the pulp-molded container structure; and the first
container molding die is made with thermal conductive materials for
heating and drying paper pulp and shaping the pulp-molded container
structure.
11. A molding method of a pulp-molded container structure for
manufacturing of the pulp-molded container structure comprises:
covering with a pulp slurry on a first molding unit, when a first
container pulp-sucking and a molding die being immersed in the pulp
slurry; removing the first container pulp-sucking and the molding
die from a pulp slurry; removing excessive water on the first
molding unit by draining from a plurality pore channels and a
strainer; shaping a raw container structure by a second container
pulp-sucking and molding die fitting with a first container
pulp-sucking and molding die; sucking the raw container by the
second container pulp-sucking and molding die, to remove the raw
container from the first container pulp-sucking and molding die;
holding the raw container by a first container heating and molding
die; sealing the raw container in between the first container
heating and molding die and a second container heating and molding
die; heating and drying the raw container by the first container
heating and molding die and the second container heating and
molding die, to shape a pulp-molded container structure.
12. The molding method of a pulp-molded container structure of
claim 11, wherein the raw container is shaped with dehydrated paper
pulp adhered to and matching the strainer on the first molding
unit.
13. The molding method of a pulp-molded container structure of
claim 11, wherein the second container pulp-sucking and molding die
sucks the raw container through the pore channels.
14. The molding method of a pulp-molded container structure of
claim 11, wherein a central section, a rim section, and an annular
snap-fit section are formed at the same time on the pulp-molded
container when the pulp-molded container is shaped by the first
container heating and molding die and the second container heating
and molding die.
15. The molding method of a pulp-molded container structure of
claim 11, further comprises: sucking the pulp-molded container
structure by the second container heating and molding die, to
separate the pulp-molded container structure from the second
container heating and molding die.
16. A pulp-molded container structure is made by the molding device
of claim 1 or 6, wherein the container structure comprises: a
central section at the center and an annular rim section encircling
the central section and having a sidewall; a snap-fit section
extended from the outside of the sidewall, protruding inwardly in
minus degree, and formed integrally with the pulp-molded container
structure, and expanded and contracted based on physical elasticity
of paper pulp for abutting and fastening a protrusion extended from
a rim of an external container that is coupled with the pulp-molded
container structure.
17. The pulp-molded container structure of claim 16, wherein the
rim section is used to clamp an outside wall of the external
container which is coupled with the pulp-molded container
structure.
18. The pulp-molded container structure of claim 16, wherein the
container structure consists of 5% to 55% of Filament, and 45% to
65% of Spun.
19. The pulp-molded container structure of claim 16, wherein the
density of the container structure is between 500 kg/m.sup.3 to 700
kg/m.sup.3.
20. The pulp-molded container structure of claim 16, wherein the
thickness of the container structure is between 0.5 mm to 1.2 mm.
Description
INCORPORATION BY REFERENCE
[0001] The present application is a continuation in part of U.S.
patent application Ser. No. 15/595,893 filed on May 15, 2017 which
is incorporated herein by reference in its entirety.
BACKGROUND OF THE INVENTION
1. Field of the Invention
[0002] The present disclosure relates to a pulp-molded container
structure, particularly a pulp-molded container structure and a
molding device thereof wherein the pulp-molded container structure
comprises a snap-fit section which is formed with the pulp-molded
container structure integrally and coupled with a cup.
2. Description of the Prior Art
[0003] Paper cups and bowls are disposable consumables ubiquitous
in our daily lives. Currently, the manufacturers considering costs
of manufacturing materials and requests for distinct products have
created various methods to manufacture these disposable
consumables.
[0004] To manufacture a paper product with firm texture or styling
or a thicker layer, a manufacturer should deposit paper pulp to a
certain thickness for molding. However, the convex edges or
irregular surface wrinkles, which are extruded from deposited paper
pulp frequently and disfigures the aesthetic exteriors or
structural strength, are common in ordinary thinner disposable
paper cups or bowls made of thicker paper pulp and shaped in the
conventional manufacturing process.
[0005] Furthermore, an appropriate manufacturing process based on
pulp molding (also known as the pulp die molding method) developed
recently is applicable to paper products with a certain thickness.
However, the inside embossed or barb-like patterns which contribute
to securing combination of a cup container and a paper cup are
mostly disposed on the rim and/or the snap-fit section of an
ordinary pulp-molded cup container and shaped on a formed container
in a secondary local roll-extrusion process.
[0006] In this regard, the time cost in a secondary roll-extrusion
process for rework which probably causes defects or disfigurements
is indispensable to in-process containers.
SUMMARY OF THE INVENTION
[0007] To resolve the problems in the prior arts, an integrated
pulp-molded container structure provided in the present disclosure
is to reduce manufacturing time and costs.
[0008] According to the purpose, a pulp-molded container structure
comprises a central section and a rim section which encircles the
central section, accommodates an upper wall edge of an external
container coupled with the pulp-molded container structure, and
clamps the wall edge of the external container.
[0009] Furthermore, the rim section comprises a snap-fit section,
which is downward connected with the upper wall edge of the
external container, manufactured with the central section as well
as the rim section integrally, and further coupled with a
protrusion encircling the external container for a firm combination
of the pulp-molded container structure and the external container
when the rim section clamps the upper wall edge of the external
container.
[0010] To manufacture the pulp-molded container structure, the
present disclosure provides a molding device of a pulp-molded
container structure, which comprises a first container molding die
and a second container molding die, wherein the first container
molding die comprises a first molding unit with a center molding
part for shaping of the corresponding central section of the
pulp-molded container structure and a rim molding part for shaping
of the corresponding rim section of the pulp-molded container
structure; the rim molding part comprises a snap-fit molding part
recessed from an outer edge of the rim molding part and situated at
one side far away from the center molding part for shaping of the
minus degree snap-fit section of the pulp-molded container
structure; the second container molding die comprises a second
molding unit for shaping of a corresponding exterior profile of the
pulp-molded container structure.
[0011] To manufacture the pulp-molded container structure, the
present disclosure further provides a molding method of a
pulp-molded container structure, which comprises immersing a first
container pulp-sucking and molding die in a pulp slurry, and
draining and pressing the pulp slurry to shape a raw container;
then removing the raw container to a first container heating and
molding die, and heating and sealing the raw container between the
first container heating and molding die and the second container
heating and molding die, to shape the pulp-molded container
structure.
[0012] As mentioned previously, in pulp-based hot press molding
steps, the elastic pulp-molded container structure features the
snap-fit section which is slightly deformed for separation from the
snap-fit molding part in a de-molding process and characteristic of
a profile similar to that of the snap-fit molding part. As such,
the snap-fit section is coupled with a protrusion extended outward
from a cup rim of an external container which is to be connected to
the snap-fit section at the pulp-molded container structure as
required in standards of product manufacturing.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] FIG. 1 is a sectional view of a pulp-molded of coffee
container structure;
[0014] FIG. 2 is a sectional view which illustrates both a
pulp-molded container structure and an external container join
together;
[0015] FIG. 3 is a schematic view which illustrates a second
container molding die in a molding device of a pulp-molded
container structure;
[0016] FIG. 4 is a schematic view which illustrates a first
container molding die in a molding device of a pulp-molded
container structure;
[0017] FIG. 5 is a sectional view which illustrates a molding
device of a pulp-molded container structure in disengaged
status;
[0018] FIG. 6 is a sectional view of a container pulp-sucking and
molding device for a pulp-molded container structure;
[0019] FIG. 7A is the first schematic view which illustrates a
molding device of a pulp-molded container structure in a de-molding
process;
[0020] FIG. 7B is the second schematic view which illustrates a
molding device of a pulp-molded container structure in a de-molding
process;
[0021] FIG. 7C is the third schematic view which illustrates a
molding device of a pulp-molded container structure in a de-molding
process;
[0022] FIG. 8 is a flow diagram for steps in a manufacturing
process of using a molding device of a pulp-molded container
structure;
[0023] FIG. 9 is a schematic view of a container pulp-sucking and
molding device for a pulp-molded container structure in another
embodiment;
[0024] FIG. 10 is a schematic view which illustrates a molding
device of a pulp-molded container structure in a molding process in
another embodiment;
[0025] FIG. 11 is a sectional view of a pulp-molded of bowl
container structure; and
[0026] FIG. 12 is a sectional view of a pulp-molded of box
container structure.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0027] The features, content, advantages and effects of a pulp-mold
container and a molding device thereof in the present disclosure
are explained in embodiments and accompanying drawings which are
schematic views to illustrate the patent specification but not
intended to limit the scope of patent claims.
[0028] Referring to FIG. 1 which is a sectional view of a
pulp-molded container structure 1 comprising a central section 10
and a rim section 12 encircling the central section 10 and having a
sidewall and a top edge part for development of an inverted
U-shaped profile and further an annular snap-fit section 14 at an
inner surface of the rim section 12 being far away from the
sidewall of the central section 10 and protruding inwardly in minus
degree.
[0029] Referring to FIG. 2, which illustrates the pulp-molded
container structure 1 easily connected and coupled with an external
container 3 by means of the rim section 12 clamps the entire upper
edge of an exterior wall of the external container 3 preferably. As
shown in FIG. 2, the snap-fit section 14 abuts and contacts a
protrusion 300 outward raised or rolled from the upper edge of an
exterior wall of the external container 3, contributing to a better
combination of the pulp-molded container structure 1 and the
external container 3. It can be seen that either the rim section 12
or the snap-fit section 14 is designed to secure the pulp-molded
container structure 1 and the external container 3 as required in
standards of product manufacturing.
[0030] As a pulp-molded container structure of an ordinary paper
cup in which coffee is carried in the daily life, the pulp-molded
container structure 1 in FIG. 1 comprises the circular central
section 10 with a convex part raised from the edge and a concave
part at the center of the central section 10 in an embodiment; the
central section 10 comprises an opening from which beverages inside
are drawn and a perforation drilled on the concave part to balance
pressure in a container filled with beverages. However, it should
be iterated that the opening or the perforation is not a primary
technical feature for a pulp-molded container structure herein.
[0031] Referring to FIGS. 3 to 5, which illustrate a molding device
of a pulp-molded container structure comprises a first container
molding die 22 and a second container molding die 20. The first
container molding die 22 comprises a first molding unit 220 with a
center molding part 2201 and a rim molding part 2202 wherein the
center molding part 2201 and the rim molding part 2202 are used in
shaping an interior profile of the central section 10 of the
pulp-molded container structure 1 and an interior profile of the
rim section 12 of the pulp-molded container structure 1,
respectively. Moreover, the first container molding die 22
comprises a snap-fit molding part 2203 which is designed on the rim
molding part 2202 for shaping of the rim section 12 and at one side
far away from the central section 10 and used to form the snap-fit
section 14 of the pulp-molded container structure 1; the second
container molding die 20 comprises a second molding unit 200
designed at one side and used in shaping an exterior profile of the
pulp-molded container structure 1, wherein the rim section 12 is
used to clamp an outside wall of the external container 3 which is
coupled with the pulp-molded container structure 1.
[0032] Referring to FIG. 6, which illustrates a strainer 226 is
installed on the first molding unit 220 of the first container
molding die 22 and a plurality of pore channels 2204 are uniformly
distributed on the first container molding die 22 for development
of a first container pulp-sucking and molding die used in a
practical process. In an embodiment of a pulp-molded container
structure, each of the pore channels 2204 is opened on an outer
edge of the rim molding part 2202 of the first molding unit 220,
between the center molding part 2201 and the rim molding part 2202,
and the topmost end of the center molding part 2201. As such, the
strainer 226 lowered into a pulp tank makes paper pulp subside in a
first container pulp-sucking and molding die 22A for no pulp fibers
getting across the strainer 226 and each of pore channels 2204 from
which external air is inhaled provides suction to absorb pulp
fibers (preferably, the pulp-molded container structure 1 consists
of 5% to 55% of Filament, and 45% to 65% of Spun), draining
excessive water without jams of the pore channels 2204 and shaping
a raw pulp-molded container structure 1 inside the first container
pulp-sucking and molding die 22A. Furthermore, a plurality of pore
channels 2021 are opened on the second molding unit 200 of the
second container molding die 20 for development of a second
container pulp-sucking and molding die 20A. In the embodiment, each
of the pore channels 2021 is further opened on an outer edge of the
second molding unit 200 and opposite to the center molding part
2201 as well as the rim molding part 2202 of the first molding unit
220. As such, the second container pulp-sucking and molding die 20A
and the first container pulp-sucking and molding die 22A are
coupled with each other for supply of suction induced by outward
exhaled air to the pore channels 2021 through which a raw
pulp-molded container structure is sucked by the second container
pulp-sucking and molding die 20A from the first container
pulp-sucking and molding die 22A.
[0033] Furthermore, when the first container molding die 22 is
excavated for placement of a heating rod and a thermocouple, or the
first container molding die 22 is made with thermal conductive
materials and is securely installed on a heating plate in the
embodiment, a first container heating and molding die, which is
heated directly or via thermal conduction to increase temperature
of the first molding unit 220 inside and dry paper pulp, is
created; on the other hand, when the second container molding die
20 is excavated for placement of a heating rod and a thermocouple,
or the second container molding die 20 is made with thermal
conductive materials, and is securely installed on another heating
plate, a second container heating and molding die, which is heated
directly or via thermal conduction to increase temperature of the
second molding unit 200 inside and dry paper pulp, is created and
comprises a plurality of pore channels 2021 through which the dried
pulp-molded container structure 1 is sucked. It should be iterated
that neither the first molding unit 220 in the first container
molding die 22 nor the second molding unit 200 in the second
container molding die 20 are provided with a strainer 226
inside.
[0034] But if the first container molding die 22 and the second
container molding die 20 are applied on a plastic container
manufacturing process, the pore channels (2021, 2204) on the first
and second container molding die (20, 22), and the strainer 226
will be no more needed, due to the pore channels (2021, 2204) are
arranged for providing suction to absorb pulp fibers when external
air is inhaled, and the strainer 226 is installed for isolating
pulp fibers, to make no pulp fibers get across the strainer 226. In
the case of above, the plastic container has no fibers to allow the
strainer 226 isolating or the pore channels (2021, 2204) absorbing,
therefore, the first container molding die 22 and the second
container molding die 20 cannot be utilized on the plastic
container manufacturing process.
[0035] Referring to FIGS. 7A, 7B and 7C, which are schematic views
illustrating a molding device of a pulp-molded container structure
in a de-molding process. A pulp-molded container structure is
sucked by the corresponding second container pulp-sucking and
molding die 20A and removed from the first container pulp-sucking
and molding die 22A in a continuous process, as shown in schematic
partial enlargement views which present a relationship between the
snap-fit molding part 2203 at the edge of the first container
molding die 22 or the first container pulp-sucking and molding die
22A and the pulp-molded container structure 1.
[0036] Referring to FIG. 7A in which there is no second container
pulp-sucking and molding die displayed. FIG. 7A illustrates status
before a de-molding process that the raw pulp-molded container
structure 1 shaped in a pulp molding process is securely attached
to and matches the profile of the snap-fit molding part 2203 at the
edge of the first container molding die 22 through the strainer 226
and the snap-fit section 14 of the pulp-molded container structure
1 totally fits into the strainer 226.
[0037] Referring to FIG. 7B, which illustrates the raw pulp-molded
container structure 1 shaped in a pulp molding process is sucked by
the second container pulp-sucking and molding die 20A and gradually
separated from the first container molding die 22 in the first
container pulp-sucking and molding die 22A as well as the attached
strainer 226. As shown in FIG. 7B, the snap-fit section 14 of the
pulp-molded container structure 1, which is made of extensible
paper and extended a bit, is being removed from but still squeezed
by the snap-fit molding part 2203 and slightly deformed in a
de-molding process of separating a die from the other upward.
[0038] Referring to FIG. 7C, which illustrates the raw pulp-molded
container structure 1 shaped in a pulp molding process is sucked by
the second container pulp-sucking and molding die 20A and totally
separated from the first container molding die 22 as well as the
attached strainer 226. As shown in FIG. 7C, the extensible paper
snap-fit section 14 of the pulp-molded container structure 1, which
was totally separated from the first container pulp-sucking and
molding die 22A and deformed partially, is slightly reconstituted
and overall matches the profile of the snap-fit molding part 2203
as appropriate but possibly leaves some distinct squeezed and
deformed or truncated parts which have no adverse effect on a
pulp-molded container structure with a manufacturing process
corrected for better fastening strength between the snap-fit
section 14 and a convex part of an external container 3.
[0039] Referring to FIG. 8, which illustrates a flow diagram for a
manufacturing process of using a molding device of a pulp-molded
container structure to shape a pulp-molded container structure
according to steps as follows:
[0040] Step S801: the first molding unit is covered with pulp
slurry when the first container pulp-sucking and molding die is
immersed in pulp slurry.
[0041] Step S802: the first container pulp-sucking and molding die
is removed from pulp slurry and excessive water, which is included
in pulp slurry deposited on the first molding unit and unused in a
manufacturing process, is drained from the pore channels and the
strainer.
[0042] Step S803: the second container pulp-sucking and molding die
is driven to fit into the first container pulp-sucking and molding
die so that a raw container featuring a profile similar to that of
a desired pulp-molded container structure is shaped with dehydrated
paper pulp adhered to and matching the strainer on the first
molding unit.
[0043] Step S804: the raw container is sucked by the second
container pulp-sucking and molding die through the pore channels
for separation from the first container pulp-sucking and molding
die in a de-molding process.
[0044] Step S805: the raw container is held in the first container
heating and molding die with which the second container
pulp-sucking and molding die is coupled.
[0045] Step S806: the second container heating and molding die is
driven to fit into the first container heating and molding die
completely for sealing the raw container between the first and
second container heating and molding dies.
[0046] Step S807: the raw container is heated and dried by the
first container heating and molding die as well as the second
container heating and molding die and totally dehydrated for
shaping of the pulp-molded container structure.
[0047] Step S808: the pulp-molded container structure is sucked by
the second container heating and molding die for separation.
[0048] According to a manufacturing process from step S801 to step
S808, a pulp-molded container structure is shaped. Particularly,
shaping 500 kg/m.sup.3 to 700 kg/m.sup.3 density, and 0.5 mm to 1.2
mm thickness of the pulp-molded container structure.
[0049] An alternative manufacturing process different from that of
the above embodiment is introduced in the present disclosure. In
the alternative embodiment, the profile of a first molding unit (a
second molding unit) in a container pulp-sucking and molding die
(as well as a container heating and molding die) is exchanged to
the profile of a second molding unit (a first molding unit). When a
molding unit to shape an exterior profile of a pulp-molded
container structure is first immersed in pulp slurry and driven to
fit into another molding unit which is used to shape an interior
profile of a snap-fit section on the pulp-molded container
structure, a pulp-molded container structure featuring an identical
profile can be created with two dies at reversed positions.
[0050] Referring to FIGS. 9 and 10, which illustrate an another
embodiment of the first container molding die 22 and the second
container molding die 20, as shown in the FIG. 9, the first
container molding die 22 and the second container molding die 20
can be arranged on opposite position (which means the first
container molding die 22 arranged on upside, and the second
container molding die 20 arranged on bottom-side).
[0051] After the second container molding die 20 immersed in pulp
slurry, the second molding unit 200 is covered with pulp slurry,
and by the way of draining the pulp slurry by the pore channels
2021 and the strainer on the second container molding die 20,
driving the first container molding die 22 to fit into the second
container molding die 20 to shape the desired pulp-molded container
structure with dehydrated paper pulp, and absorbing the raw
container by the first container molding die 22 to process a
de-molding process and heating process etc. thus, the pulp-molded
container structure 1 and the snap-fit 14 can be also shaped
through afore-molding-process.
[0052] Referring to FIGS. 11 and 12, which are sectional views
illustrating another embodiments of the pulp-molded container
structure 1, and please refer the FIG. 1 together. In alternative
embodiments, the pulp-molded container structure 1 in the present
invention can further be utilized on bowl container, box container,
or any similar kinds.
[0053] In the one of embodiment (e.g. bowl container), the snap-fit
14 is formed on the inner surface of the annular rim section 12 of
the bowl container 1, for engaging with the protrusion 300 on the
peripheral of the bowl 3.
[0054] The another embodiment (e.g. box container) is similar with
the bowl container embodiment of above, the snap-fit 14 can be also
formed on the inner surface of the annular rim section 12 of the
box container 1, for engaging with the protrusion 300 on the
peripheral of the box 3.
[0055] Therefore, the pulp-molded container structure 1 in the
present invention can be utilized for various containers, but is
not limited in the aforementioned embodiments.
[0056] In summary, a pulp-molded container structure and a molding
device thereof for once-and-for-all die molding of a snap-fit
section in the patent application, which are innovative work in
technical ideas and features several effects in contrast to
conventional molded containers, meets novelty and non-obviousness
for patentability.
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