CN112080966A - Half net type paper-plastic mould of lower mould - Google Patents
Half net type paper-plastic mould of lower mould Download PDFInfo
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- CN112080966A CN112080966A CN202010755039.XA CN202010755039A CN112080966A CN 112080966 A CN112080966 A CN 112080966A CN 202010755039 A CN202010755039 A CN 202010755039A CN 112080966 A CN112080966 A CN 112080966A
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- lower die
- paper
- mold
- die
- frame
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
- D21J3/00—Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds
- D21J3/10—Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds of hollow bodies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Abstract
The invention discloses a lower die half-net type paper-plastic die which comprises an upper die and a lower die, wherein the lower die comprises a lower die base and a lower die wire mesh, a wire mesh forming part is constructed on the lower die base, and the lower die wire mesh is arranged at the wire mesh forming part; the lower die is provided with a screen frame, the screen forming part and the upper die form a forming die cavity when the upper die is closed, and a gap exists between the screen frame and the lower die screen. According to the lower die half-net type paper-plastic die, the lower die wire net is placed at the wire net forming part on the lower die, the lower die wire net is further matched with the lower die without a wire net frame to form a forming die cavity, the part, corresponding to the lower die without the wire net frame, of a product wet blank is directly contacted with the wall of the lower die, at least part of the surface of a hot-pressed product forms a smooth surface, and the product wet blank can be connected more tightly when being matched with a matched cover of a corresponding paper-plastic product.
Description
Technical Field
The invention relates to a paper-plastic mould for paper pulp moulding, in particular to a lower mould half-net type paper-plastic mould.
Background
The paper pulp molding package is commonly called as a paper holder, is a new industry, and utilizes materials such as renewable resources, waste newspaper, waste paper boxes, cane pulp and the like for reprocessing, thereby reducing the pollution of waste paper on one hand, and more importantly greatly relieving the consumption of paper raw material wood. At present, the process of pulp molding is developed faster in China, and comprises the steps of paper shredding → pulping → forming → drying → shaping → quality inspection and the like. The process is complicated and belongs to labor intensive industry. The product can be applied to industrial packaging, such as automobile spare parts, bulbs, electronic products and the like. It can also be used for packing agricultural products, such as paper tray for fruit, egg tray for egg, duck egg, etc. Or in food grade packaging or containers such as disposable degradable tableware, drinking cups, coffee cups, etc., but at a relatively high cost. At present, many enterprises are promoted to manufacture pulp molding products in China, but the problems of small enterprise scale, not strict quality control, serious export bottleneck, lack of designers, lack of production management experientials and the like generally exist.
Most paper mould product uses the full net technology production of paper mould lower mould, and the lower mould constitutes die cavity one side surface and need sets up the lower mould silk screen, and the lower mould silk screen contacts with the wet base of product and bears the fibre in the wet base in hot briquetting process, makes steam discharge in the exhaust hole of lower mould bottom simultaneously. However, when the product is high in drawing angle or complex in structure, the lower die wire mesh is difficult to press and form, the lower die wire mesh is easy to crack, and the product rejection rate is high.
Disclosure of Invention
In view of the above problems in the prior art, the present invention aims to provide a composite splicing type paper-plastic mold with low processing cost and easy maintenance.
In order to achieve the above object, an aspect of the present invention provides a lower mold half-mesh type paper-plastic mold, including an upper mold and a lower mold, the lower mold including a lower mold base and a lower mold mesh, the lower mold base being configured with a mesh forming portion thereon, the lower mold mesh being disposed at the mesh forming portion; the lower die is provided with a screen frame, the screen forming part and the upper die form a forming die cavity when the upper die is closed, and a gap exists between the screen frame and the lower die screen.
Preferably, the lower mold mesh-free frame is a frame disposed around the screen forming portion, and an inner periphery of the lower mold mesh-free frame is configured as a mesh-free forming portion which forms at least a part of the paper-plastic product.
Preferably, a plurality of bosses which abut against the upper die during die assembly are formed on one side of the lower die frame which is not provided with the screen and is close to the upper die.
Preferably, the lower die frame without screen is provided with a plurality of first positioning holes, the lower die base is provided with second positioning holes corresponding to the first positioning holes, and the lower die frame without screen is positioned on the lower die base through positioning pins penetrating through the first positioning holes and the second positioning holes.
Preferably, the lower die non-net frame is provided with a plurality of first screw holes, the lower die base is provided with second screw holes corresponding to the first screw holes, and the lower die non-net frame is fixed on the lower die base through locking screws penetrating through the first screw holes and the second screw holes.
Preferably, at least the screen forming portion is provided with an air vent penetrating the lower mold base.
Preferably, the exhaust holes are provided in a plurality of rows or columns.
Preferably, the plurality of exhaust holes are arranged at equal intervals.
Preferably, the second screw hole and/or the second positioning hole penetrate through the lower die base.
Preferably, the bottom of the lower die base is provided with a plurality of exhaust grooves, and the exhaust holes are communicated with the exhaust grooves.
Preferably, the exhaust groove is a through groove.
Preferably, one corner of the upper die, the lower die without the screen frame and the lower die base is a chamfer.
Preferably, the chamfer is a chamfered angle.
Compared with the prior art, the lower die half-net type paper-plastic die provided by the invention has the advantages that the lower die wire net is placed at the wire net forming part on the lower die, the lower die wire net is further matched with the lower die without the wire net frame to form a forming die cavity, the part of a product wet blank corresponding to the lower die without the wire net frame is directly contacted with the wall of the lower die, at least part of the surface of a hot-pressed product forms a smooth surface, and the product wet blank can be more tightly connected when being matched with the matched cover of the corresponding paper.
In a further improvement scheme, exhaust holes can be additionally formed, exhaust is quicker and smoother, the production time is shortened, and the production efficiency is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
This document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology.
Drawings
Fig. 1 is a schematic perspective view of a lower mold half-mesh paper-plastic mold of the present invention.
Fig. 2 is a schematic structural view of another view angle of the lower mold half-mesh type paper-plastic mold of the invention.
Fig. 3 is a structural schematic diagram of another view angle of the lower mold half-mesh type paper-plastic mold of the invention.
Fig. 4 is a cross-sectional structural view of the lower mold half-mesh type paper-plastic mold of the present invention.
Fig. 5 is a schematic diagram of a three-dimensional explosion structure of a lower half-mesh paper-plastic mold (including a product wet blank) of the invention.
The main reference numbers:
1-upper mould; 2-lower die base; 3-the lower die has no screen frame; 4-lower die wire mesh; 5-wet blank of the product; 6-locking screw; 7-a positioning pin; 21-a screen forming section; 22-a rib; 23-a second screw hole; 24-a second positioning hole; 25-an exhaust groove; 251-an exhaust hole; 31-a non-mesh frame forming part; 32-a first screw hole; 33-a first positioning hole; 34-boss.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described below clearly and completely with reference to the accompanying drawings of the embodiments of the present disclosure.
It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of the word "comprising" or "comprises", and the like, in this disclosure is intended to mean that the elements or items listed before that word, include the elements or items listed after that word, and their equivalents, without excluding other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
To maintain the following description of the embodiments of the present disclosure clear and concise, a detailed description of known functions and known components have been omitted from the present disclosure.
As shown in fig. 1, 2, 4 and 5, a lower mold half-mesh paper-plastic mold according to an embodiment of the present invention includes an upper mold 1 and a lower mold (not shown), the lower mold including a lower mold base 2 and a lower mold mesh 4, the lower mold base 2 having a mesh forming portion 21 formed thereon, the lower mold mesh 4 being disposed on the mesh forming portion 21; the device also comprises a lower die non-screen frame 3 arranged on the lower die base 2, wherein the lower die non-screen frame 3, the screen forming part 21 and the upper die 1 form a forming die cavity (not marked in the figure) when the dies are assembled, and gaps (not marked in the figure) exist between the lower die non-screen frame 3, the lower die screen 4 and the lower die base 2. In practice, the lower mold frame-less 3 may be configured as a frame disposed around the screen forming part 21, and the inner periphery near the lower mold frame-less 3 is configured as a frame-less forming part 31, and the frame-less forming part 31 forms at least a part of the paper-plastic product. In other words, the frame-less forming section 31 herein actually forms the paper-plastic product together with the wire forming section 21. The screen forming portion 21 is provided with the lower die screen 4, so that when the wet product blank 5 is placed on the lower die screen 4 during the hot press forming, as shown in fig. 5, a part of the wet product blank 5 is still received on the lower die non-screen frame 3, so that during the hot press forming, a smooth product surface is generated corresponding to the part of the product without the lower die frame 3, and a surface having a mesh texture is generated corresponding to the part of the screen forming portion 21. And actually, the part with the smooth surface can correspond to the separately arranged cover body part of the paper-plastic product, so that a better sealing effect can be obtained relative to the surface with the net-shaped grains. In addition, during the hot press molding, the moisture of the product wet blank 5 overflows under pressure and heat, and in order to obtain better air exhaust effect, in some embodiments, as shown in fig. 3 and 5, at least the wire forming portion 21 is provided with an air exhaust hole 251 penetrating through the lower mold base 2. And, the exhaust holes 251 are provided in a plurality of rows or columns in consideration of uniform diffusion. Preferably, the plurality of the exhaust holes 251 are equally spaced. In other words, in the preferred embodiment, the plurality of the vent holes 251 are distributed in a matrix-like manner. As a further improvement, when the gas discharge holes 251 discharge moisture to the lower side of the lower mold base 2, there is a concern about escape, and therefore, as shown in fig. 2 and 3, the lower mold base 2 is provided at the bottom thereof with a plurality of gas discharge grooves 25, and a plurality of gas discharge holes 251 are communicated to the gas discharge grooves 25. And preferably, the exhaust grooves 25 are through grooves. Thus, the moisture is discharged to the exhaust grooves 25 through the exhaust holes 251, and is further discharged from both sides of the lower mold base 2 through the exhaust grooves.
In the present invention, the lower mold frame 3 may be further provided with a plurality of bosses 34 on a side close to the upper mold 1 for abutting against the upper mold during mold clamping, so as to hold the upper mold 1 in place during mold clamping. In some preferred embodiments, one corner of the upper mold 1, the lower mold without the mesh frame 3, and the lower mold base 2 is chamfered. As shown in fig. 1 and 3, the chamfer is preferably a chamfered angle. The structure is actually designed to be fool-proof, and the lower die non-screen frame 3 can be conveniently and accurately assembled on the lower die base 2.
In practice, the positioning problem still needs to be considered during the assembly process, and therefore, as shown in fig. 5, preferably, a plurality of first positioning holes 33 are provided on the lower die non-mesh frame 3, second positioning holes 24 are provided on the lower die base 2 corresponding to the first positioning holes 33, and the lower die non-mesh frame 3 is positioned on the lower die base 2 by positioning pins 7 inserted through the first positioning holes 33 and the second positioning holes 24.
Also, on the basis of the above-mentioned solution, if considering the fixing problem of the lower mold frame 3, it is preferable that a plurality of first screw holes 32 be provided on the lower mold frame 3, second screw holes 23 be provided on the lower mold base 2 at positions corresponding to the first screw holes 32, and the lower mold frame 3 is fixed on the lower mold base 2 by locking screws 6 inserted through the first screw holes 32 and the second screw holes 23. In addition, it is also considered that the second screw hole 23 and/or the second positioning hole 24 are preferably formed to penetrate the lower mold base 2. Such a structure makes it possible for moisture in the hot pressing process to escape from the second screw holes 23 and the second positioning holes 24.
When the lower die mesh-free paper-plastic die works, the upper die 1 is lifted to a specified distance, the product wet blank 5 is put in, the part of the product wet blank 5, which corresponds to the outside of the wire mesh forming part 21, is directly attached to the lower die mesh-free frame 3, and the part of the corresponding product is smooth and attractive without the impression shape of a mesh, so that the size is more accurate and the product is more attached to a matched cover; when the upper die 1 is pressed down, the generated water vapor is discharged from the exhaust holes 251 and the exhaust grooves 25 arranged on the lower die base 2, after the wet blank 5 of the product is pressed dry, the upper die 1 moves upwards, meanwhile, in some improved schemes, air blowing holes (not shown in the figure) can be independently arranged on the upper die 1, when the upper die 1 is lifted, air is blown from the air blowing holes of the upper die 1, the product can be prevented from being adhered to the upper die 1, then the formed paper-plastic product is sucked up through the sucking disc mechanism, of course, in the process, air flow can be simultaneously applied to the exhaust holes 251 of the lower die base 2, and the air flow impacts against the formed product through the exhaust holes 251 and enables the formed product to be separated from the lower die base 2.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.
Claims (13)
1. The lower die half-net type paper-plastic die comprises an upper die and a lower die, wherein the lower die comprises a lower die base and a lower die wire net, a wire net forming part is constructed on the lower die base, and the lower die wire net is arranged on the wire net forming part; the lower die is provided with a screen frame, the screen forming part and the upper die form a forming die cavity when the upper die is closed, and a gap exists between the screen frame and the lower die screen.
2. A paper-plastic mold according to claim 1, wherein the lower mold frame-less is a frame disposed around the wire forming section, and an inner peripheral edge adjacent to the lower mold frame-less is configured as a frame-less forming section that forms at least a portion of a paper-plastic product.
3. A paper-plastic mold as claimed in claim 1, wherein the lower mold has a frame without a screen, and a plurality of bosses are formed on one side of the lower mold close to the upper mold and abut against the upper mold when the mold is closed.
4. A paper-plastic mold as claimed in claim 1, wherein the lower mold frame is provided with a plurality of first positioning holes, the lower mold base is provided with second positioning holes corresponding to the first positioning holes, and the lower mold frame is positioned on the lower mold base by positioning pins passing through the first positioning holes and the second positioning holes.
5. A paper-plastic mold as claimed in claim 4, wherein the lower mold frame is provided with a plurality of first screw holes, the lower mold base is provided with second screw holes corresponding to the first screw holes, and the lower mold frame is fixed on the lower mold base by locking screws penetrating through the first screw holes and the second screw holes.
6. A paper-plastic mold according to claim 5, wherein the second screw hole and/or the second positioning hole penetrate through the lower mold base.
7. A paper-plastic mold according to claim 1, wherein at least the wire mesh forming portion is provided with a vent hole penetrating the lower mold base.
8. A paper-plastic mould according to claim 7 wherein the vent holes are provided in a plurality of rows or columns.
9. A paper-plastic mold according to claim 7 wherein a plurality of said vents are equally spaced.
10. A paper-plastic mold according to claim 7, wherein a plurality of air discharge grooves are formed in the bottom of the lower mold base, and a plurality of air discharge holes are communicated to the air discharge grooves.
11. A paper-plastic mold according to claim 10, wherein the air vent grooves are through grooves.
12. A paper-plastic mold as defined in claim 1, wherein one of the corners of the upper mold, the lower mold without the mesh frame and the lower mold base is configured as a chamfer.
13. A paper-plastic mold according to claim 12 wherein the chamfer is a chamfer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010755039.XA CN112080966B (en) | 2020-07-31 | 2020-07-31 | Half net type paper-plastic mould of lower mould |
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|---|---|---|---|
| CN202010755039.XA CN112080966B (en) | 2020-07-31 | 2020-07-31 | Half net type paper-plastic mould of lower mould |
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| CN112080966A true CN112080966A (en) | 2020-12-15 |
| CN112080966B CN112080966B (en) | 2022-11-15 |
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