CN219010823U

CN219010823U - Cold pressing mold assembly and cold pressing machine for pulp molding products

Info

Publication number: CN219010823U
Application number: CN202222577620.4U
Authority: CN
Inventors: 王博; 陈舒
Original assignee: Tianjin Zhonghechen Technology Co ltd
Current assignee: Tianjin Zhonghechen Technology Co ltd
Priority date: 2022-09-28
Filing date: 2022-09-28
Publication date: 2023-05-12
Anticipated expiration: 2032-09-28

Abstract

The utility model provides a pulp molding product cold pressing mold assembly and a cold press, comprising: the mold comprises an upper mold and a lower mold, a cavity in the shape of a pulp molding product is formed when the upper mold and the lower mold are matched, a plurality of through holes which are penetrated up and down are formed in the lower mold, a sealing bottom plate is arranged on the lower surface of the lower mold, an air suction channel communicated with external vacuumizing equipment is formed in the sealing bottom plate, and the air suction channel is communicated with the cavity; the porous elastic layer is arranged on the surface of the upper die and/or the lower die, and the shape of the porous elastic layer corresponds to the shape of the pulp molding green body. The pulp molding product cold-pressing mold component adopts a plane cold-pressing mode, uses sponge as a medium and uses vacuum adsorption as an aid to reduce the water content of a pulp molding blank to between 30 and 40 percent.

Description

Cold pressing mold assembly and cold pressing machine for pulp molding products

Technical Field

The utility model belongs to the field of pulp molding production equipment, and particularly relates to a pulp molding product cold pressing mold assembly and a cold press.

Background

Pulp molding has become a rapidly growing area of many composite packaging and cutlery. At present, the problems of high cost, long period, low efficiency and the like widely exist, and the problems become one of important factors influencing the development and application of pulp molding products. Up to now, pulp molded tableware inevitably adopts the conventional pulp molding process, firstly wet pulp 3D products are manufactured on a 3D molding machine, then hot pressing is performed, and finally die cutting and cutting off scraps are performed. These steps are also commonly applied to pulp bowls, dinner plates, and various complex structure packages, with very well customized structures. The method is also applied to paper pulp molding knife and fork spoons, but because the moisture content of the wet blank after molding is 80% in the manufacturing process, the hot pressing cost is high, and the corner in the molding process is dried along with the hot pressing molding of the product because the product of the knife and fork spoons is smaller and the gram weight is lower, wherein the weight of the corner and the weight of the product reach 1:1, the method is also used for heating and drying, the heat energy loss is increased, and finally the leftover materials of the product return to a beating pool after hot pressing together with the product, so that the energy consumption required by beating is increased.

A pulp molding secondary hot molding process as disclosed in the patent application CN202111344362.9, comprising the steps of: in the pulp molding wet embryo forming stage, squeezing and dehydrating the pulp molding wet embryo forming mold at the mold temperature of 100-120 ℃; step two: and in the pulp molding, drying and shaping stage, hot-pressing, drying and shaping are carried out by a pulp molding, drying and shaping mold under the mold temperature condition of 200-220 ℃. The wet blank is firstly subjected to the pulp molding wet blank forming stage to reduce the moisture in the wet blank, and then the embryo can be quickly dried and shaped through the pulp molding drying shaping stage. The hot pressing process is changed into two-stage hot pressing extrusion dehydration, so that the heat energy loss can not be reduced fundamentally, and the process efficiency is reduced.

Disclosure of Invention

In view of the above, the present utility model is directed to overcoming the defects in the prior art and providing a cold press mold assembly and a cold press for pulp molding products.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

a pulp molding article cold press mold assembly comprising:

the mold comprises an upper mold and a lower mold, a cavity in the shape of a pulp molding product is formed when the upper mold and the lower mold are matched, a plurality of through holes which are penetrated up and down are formed in the lower mold, a sealing bottom plate is arranged on the lower surface of the lower mold, an air suction channel communicated with external vacuumizing equipment is formed in the sealing bottom plate, and the air suction channel is communicated with the cavity;

the porous elastic layer is arranged on the surface of the upper die and/or the lower die, and the shape of the porous elastic layer corresponds to the shape of the pulp molding product.

Further, the porous elastic layer is a sponge layer.

Further, the thickness of the porous elastic layer is 1mm-3cm.

Further, an anti-sticking layer is arranged on the surface of the porous elastic layer.

Further, the anti-sticking layer is a nylon fabric layer, a polyester fiber layer, a nylon fiber layer, an acrylic fiber layer, a cotton fiber fabric layer, a spandex fabric layer, a modal fabric layer or a silk fiber layer.

Further, a plurality of mounting holes are formed in the edge of the porous elastic layer, a plurality of threaded holes opposite to the mounting holes are formed in the surface of the die, and the porous elastic layer is fixed to the die through screws.

Further, a flange plate is arranged on the porous elastic layer, and the flange plate and the porous elastic layer are fixed on the die through screws.

Further, the shape of the surface of the porous elastic layer corresponds to the shape of the pulp molded product.

Further, the surface of sealing bottom plate is provided with the recess, be provided with the water conservancy diversion passageway that forms by a plurality of archs in the recess, the bottom of recess is provided with a plurality of water conservancy diversion holes, sealing bottom plate's lateral wall is provided with the evacuation interface, air exhaust passageway one end and water conservancy diversion hole intercommunication, the other end and evacuation interface intercommunication.

Further, a limit column is arranged between the upper die and the lower die.

The utility model also provides a pulp molding product cold press comprising the pulp molding product cold press mold assembly.

Compared with the prior art, the utility model has the following advantages:

(1) The pulp molding product cold-pressing mold assembly adopts a plane cold-pressing mode, uses a porous elastic layer as a medium, uses vacuum adsorption as an aid, and after pulp molding wet blanks are conveyed into the cold-pressing mold assembly, the surfaces of an upper mold surface or a lower mold surface or both surfaces are compounded with a porous elastic layer, the porous elastic layer is in direct contact with the upper surface and/or the lower surface of the wet pulp molding blank, a sealing bottom plate is arranged below the lower mold, the sealing bottom plate is connected with a vacuumizing device, and after a certain time or a plurality of times of pressure application, the water content of the pulp molding wet blanks is reduced to 30% -40%.

(2) The anti-sticking layer is arranged on the surface of the porous elastic layer, so that the paper pulp molding blank is prevented from being attached or stuck to the surface of the porous elastic layer in the cold pressing process, and the smoothness of the surface of a product can be improved.

(3) The pulp molding wet blank can be put into use again without drying after cold pressing and additional pressurizing to release the water contained in the pulp molding product cold pressing mold assembly, the water adsorbed in the porous elastic layer is basically equal in weight after each use, and free water in the porous elastic layer can be released through each high pressure in the cold pressing process, and the pulp molding product cold pressing mold assembly is pumped out and emptied through a vacuumizing device.

(4) The paper pulp molding cold press can directly shear the leftover materials after cold pressing, namely, the leftover materials are cut off before hot pressing, so that the energy consumption caused by hot pressing the leftover materials is prevented.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is a perspective view of a pulp molding cold press mold assembly according to an embodiment of the present utility model;

FIG. 2 is an exploded view of FIG. 1;

fig. 3 is a schematic structural view of the sealing bottom plate.

Reference numerals illustrate:

1. an upper die; 2. a lower die; 3. a through hole; 4. sealing the bottom plate; 5. a porous elastic layer; 6. a groove; 7. a protrusion; 8. a diversion channel; 9. a deflector aperture; 10. a vacuumizing interface; 11. a limit column; 12. pulp molding wet embryo; 13. and a flange plate.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

Referring to fig. 1-3, an embodiment of the present utility model is specifically configured as follows: the pulp molding product cold-pressing mold assembly of the embodiment comprises an upper mold 1 and a lower mold 2, and a limit column 11 is arranged between the upper mold 1 and the lower mold 2. The middle cavity of pulp molding product shape that forms when last mould 1 and lower mould 2 cooperate, be provided with a plurality of through-holes 3 that link up from top to bottom in the lower mould 2, the lower surface of lower mould 2 is provided with sealed bottom plate 4, is provided with the air extraction passageway with outside evacuating equipment intercommunication in the sealed bottom plate 4, the air extraction passageway intercommunication cavity.

The surface of sealing bottom plate 4 is provided with recess 6, is provided with the water conservancy diversion passageway 8 that is formed by a plurality of archs 7 in the recess 6, and the bottom of recess 6 is provided with a plurality of water conservancy diversion holes 9, and sealing bottom plate 4's lateral wall is provided with evacuation interface 10, and air evacuation passageway one end and water conservancy diversion hole 9 intercommunication, the other end and evacuation interface 10 intercommunication.

And starting the external vacuumizing equipment to enable the water in the pulp molding product with higher water content in the cavity to be discharged along the air suction channel.

The surface of the upper die 1 or the lower die 2 is provided with a porous elastic layer 5 or the lower surface of the upper die 1 and the upper surface of the lower die 2 are both provided with the porous elastic layer 5, and the shape of the surface of the porous elastic layer 5 corresponds to the shape of the pulp molding product. The porous elastic layer 5 is a sponge layer as a preferred embodiment of the present example. The sponge layer is porous elastic structure, and when cold pressing at every turn, pulp molding wet embryo 12 receives the extrusion after, and its inside moisture can flow and adsorb in the sponge, simultaneously, the free water that adsorbs in the sponge can release at extrusion at every turn, under the effect of outside evacuating equipment, in the water conservancy diversion passageway 8 on sealed bottom plate 4 surface is arranged to through-hole 3 via lower mould 2, follow the evacuation passageway in the sealed bottom plate 4 again, and the pipeline that the evacuation interface 10 of its lateral wall connects is discharged, finally realize reducing the reduction of pulp molding wet embryo 12 moisture content.

As a preferred embodiment of the present example, the thickness of the porous elastic layer 5 is 1mm to 30mm. Such as 2mm, 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, 15mm, 16mm, 17mm, 18mm, 20mm, 22mm, 25mm, 26mm, 27mm, 28mm, 30mm, etc.

The porous elastic layer 5 can be fixed with the mold by bonding, and of course, when the porous elastic layer 5 is bonded with the lower mold 2, the through holes 3 need to be avoided, so that the normal discharge of water is ensured. In order to realize the further installation and fixation of the porous elastic layer 5 and the upper die 1 and the lower die 2, a plurality of installation holes are formed in the edge of the porous elastic layer 5, a plurality of threaded holes opposite to the installation holes are formed in the surface of the die, and the porous elastic layer 5 and the die are fixed by screwing screws into the threaded holes after penetrating through the installation holes. In order to fix the porous elastic layer 5 to the surface of the mold more firmly, as a preferred embodiment of the present example, a flange plate 13 is provided on the porous elastic layer 5, and screws are screwed into the screw holes after passing through the flange plate 13 and the mounting holes at the edge of the porous elastic layer 5 in order, thereby fixing the porous elastic layer 5 to the mold.

As a preferred implementation manner of this embodiment, the surface of the porous elastic layer 5 is provided with an anti-adhesion layer, and the anti-adhesion layer is a nylon fabric layer, a polyester fiber layer, a nylon fiber layer, an acrylic fiber layer, a cotton fiber fabric layer, a spandex fabric layer, a modal fabric layer or a silk fiber layer. The fabrics have certain elasticity, are durable and wear-resistant on the premise of ensuring that the paper pulp molding blank body is not directly adhered to the porous elastic layer 5, and have longer service life.

The utility model also provides a pulp molding cold press comprising the pulp molding cold press mold assembly. The water content of the pulp molding blank body with the water content of about 80 percent prepared in the previous step can be reduced to 30-40 percent by using the cold press. The energy consumption of the subsequent hot pressing process is reduced, and meanwhile, the shearing process can be arranged between the cold pressing process and the hot pressing process after the water content is reduced, so that redundant leftover materials are cut off in advance, the situation that the leftover materials needing to be cut off enter the hot pressing process is avoided, and the energy consumption is further reduced.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. A pulp molding article cold press mold assembly, characterized by: comprising the following steps:

2. The pulp molding cold press mold assembly of claim 1, wherein: the porous elastic layer is a sponge layer.

3. The pulp molding cold press mold assembly of claim 2, wherein: the thickness of the porous elastic layer is 1mm-3cm.

4. The pulp molding cold press mold assembly of claim 1, wherein: the surface of the porous elastic layer is provided with an anti-adhesive layer.

5. The pulp molding cold press mold assembly of claim 4, wherein: the anti-sticking layer is a nylon fabric layer, a polyester fiber layer, a nylon fiber layer, an acrylic fiber layer, a cotton fiber fabric layer, a spandex fabric layer, a modal fabric layer or a silk fiber layer.

6. The pulp molding cold press mold assembly of claim 1, wherein: the surface of the porous elastic layer corresponds to the shape of the pulp molded product.

7. The pulp molding cold press mold assembly of claim 1, wherein: the surface of sealing bottom plate is provided with the recess, be provided with the water conservancy diversion passageway that forms by a plurality of archs in the recess, the bottom of recess is provided with a plurality of water conservancy diversion holes, sealing bottom plate's lateral wall is provided with the evacuation interface, air exhaust passageway one end and water conservancy diversion hole intercommunication, the other end and evacuation interface intercommunication.

8. The pulp molding cold press mold assembly of claim 1, wherein: and a limit column is arranged between the upper die and the lower die.

9. A pulp molded article cold press, characterized by: the cold press comprises a pulp moulding article cold press mould assembly according to any of claims 1-8.