阅读说明：本技术 纸浆模塑制品成型装置及其纸塑模具 (Paper pulp molding product forming device and paper-plastic mold thereof ) 是由 吴姣平 梅锦涛 于 2020-05-21 设计创作，主要内容包括：本发明提供一种纸浆模塑制品成型装置及其纸塑模具,属于纸浆模塑成型设备技术领域。其中,该纸塑模具包括带有导向结构的成型模具、模具安装板以及用于使成型模具与模具安装板相连接的紧固螺丝；所述成型模具开设有多个轴向竖直的安装孔；所述紧固螺丝包括依次一体连接的头部、柱体部、外螺纹部；所述柱体部的外径比安装孔的内径小,并且柱体部的长度等于或大于安装孔的高度；所述外螺纹部的外径比安装孔的内径小且外螺纹部的内径比柱体部的外径大；所述模具安装板对应开设有与外螺纹部螺纹连接的连接孔。本发明结构新颖,实用稳定,解决了现有的纸塑模具因热胀冷缩引起其导向结构发生形变,从而导致无法精确导向合模的技术问题。(The invention provides a paper pulp molding product forming device and a paper-plastic mold thereof, belonging to the technical field of paper pulp molding forming equipment. The paper-plastic mold comprises a forming mold with a guide structure, a mold mounting plate and a fastening screw for connecting the forming mold and the mold mounting plate; the forming die is provided with a plurality of axially vertical mounting holes; the fastening screw comprises a head part, a column part and an external thread part which are sequentially and integrally connected; the outer diameter of the cylindrical portion is smaller than the inner diameter of the mounting hole, and the length of the cylindrical portion is equal to or greater than the height of the mounting hole; the outer diameter of the external thread part is smaller than the inner diameter of the mounting hole, and the inner diameter of the external thread part is larger than the outer diameter of the column part; and the die mounting plate is correspondingly provided with a connecting hole in threaded connection with the external thread part. The invention has novel structure, is practical and stable, and solves the technical problem that the existing paper-plastic mould cannot accurately guide to mould closing because the guide structure of the existing paper-plastic mould deforms due to expansion with heat and contraction with cold.)

1. A paper-plastic mould comprises a forming mould with a guide structure and a mould mounting plate, and is characterized by also comprising a fastening screw for connecting the forming mould and the mould mounting plate;

the forming die is provided with a plurality of axially vertical mounting holes;

the fastening screw comprises a head part, a column part and an external thread part which are sequentially and integrally connected; an outer diameter of the post is smaller than an inner diameter of the mounting hole, and a length of the post is equal to or greater than a height of the mounting hole; the outer diameter of the external thread part is smaller than the inner diameter of the mounting hole, and the inner diameter of the external thread part is larger than the outer diameter of the column part;

and the die mounting plate is correspondingly provided with a connecting hole in threaded connection with the external thread part.

2. A paper-plastic mold as claimed in claim 1, wherein the inner wall of the mounting hole has an internal threaded portion protruding radially inwardly at an end thereof adjacent to the head portion, adapted to be threadedly coupled with the external threaded portion; the internal thread portion has an inner diameter larger than an outer diameter of the cylindrical portion.

3. A paper-plastic mold as claimed in claim 2, wherein the length of the internal thread portion is smaller than the length of the external thread portion.

4. A paper-plastic mould according to any one of claims 1 to 3 wherein the head is an internal hexagonal head or an external hexagonal head.

5. A paper-plastic mould as claimed in any one of claims 1 to 3, wherein the junction of the head portion and the body portion is provided with a circular arc transition portion.

6. A paper-plastic mould according to any one of claims 1 to 3, wherein the outer diameter of the head is larger than the inner diameter of the mounting hole.

7. A paper-plastic mould according to any one of claims 1 to 3, wherein the cross-sectional shape of the cylindrical portion is circular.

8. A paper-plastic mould according to any one of claims 1 to 3, wherein the array of mounting holes are arranged at the corners and sides of the forming mould.

9. A paper-plastic mould according to claim 8, wherein the height of the mounting hole is less than or equal to half the height of the forming mould.

10. A pulp molding product forming apparatus, characterized in that the pulp molding product forming apparatus is equipped with a paper mold according to any one of claims 1 to 9.

Technical Field

The invention belongs to the technical field of paper pulp molding equipment, and particularly relates to a paper pulp molding product forming device and a paper-plastic mold thereof.

Background

The pulp molding technology uses waste paper as raw material, and uses a special mold to mold a pulp molding product with a certain shape on a molding machine, and the manufacturing process comprises the working procedures of pulping, adsorption molding, drying and shaping and the like.

A pulp molding apparatus is used in the production of pulp molded products. The forming equipment is provided with a paper-plastic mould consisting of an upper mould and a lower mould, and is provided with a guide structure consisting of a positioning socket fixed on the lower mould and a positioning bolt fixed on the upper mould, for example, the paper-plastic mould with the guide function disclosed in the invention patent with the publication number of CN207031930U, the upper mould and the lower mould are guided to be matched at the correct positions through the guide function of the guide structure, the matching precision is effectively provided, the problems of large and small edges, thickness deviation and the like of a pulp molding product caused by coaxiality of the upper mould and the lower mould are avoided, and the product quality is improved.

In the prior art, the upper die and the upper die plate are fixedly connected by adopting a screw installation mode, and screws positioned at the corner positions of the upper die are respectively in threaded connection with the upper die and the upper die plate.

However, in the actual operation of the pulp molding apparatus, it was found that the hot press mold expands with heat and contracts with cold in the heating process. Because the upper die is in threaded connection with the screws, the upper die can be hindered by the screws in the process of absorbing heat to expand all around, so that the upper die expands and deforms towards the middle part, the position of the positioning bolt in the guide structure is changed, the positioning bolt cannot be accurately inserted into the positioning socket during die assembly, qualified pulp molded products cannot be manufactured, and the production benefit is greatly reduced.

It is seen that improvements and enhancements to the prior art are needed.

Disclosure of Invention

In view of the defects of the prior art, the invention aims to provide the paper pulp molding product forming device and the paper plastic mold thereof, which have unique and novel structure, are practical and stable, and solve the technical problem that the guide structure of the existing paper plastic mold is deformed due to expansion caused by heat and contraction caused by cold, so that the mold can not be accurately guided to be closed.

In order to achieve the purpose, the invention adopts the following technical scheme:

a paper-plastic mould comprises a forming mould with a guide structure and a mould mounting plate, wherein the paper-plastic mould also comprises a fastening screw for connecting the forming mould with the mould mounting plate;

the forming die is provided with a plurality of axially vertical mounting holes;

the fastening screw comprises a head part, a column part and an external thread part which are sequentially and integrally connected; an outer diameter of the post is smaller than an inner diameter of the mounting hole, and a length of the post is equal to or greater than a height of the mounting hole; the outer diameter of the external thread part is smaller than the inner diameter of the mounting hole, and the inner diameter of the external thread part is larger than the outer diameter of the column part;

and the die mounting plate is correspondingly provided with a connecting hole in threaded connection with the external thread part.

In the paper-plastic mold, an inner wall of the mounting hole is provided with an inner threaded part which is suitable for being in threaded connection with the outer threaded part and radially inwards protrudes at one end, close to the head, of the inner wall; the internal thread portion has an inner diameter larger than an outer diameter of the cylindrical portion.

In the paper-plastic mold, the length of the internal thread part is smaller than that of the external thread part.

In the paper-plastic mold, the head is an inner hexagonal head or an outer hexagonal head.

In the paper-plastic mold, an arc transition part is arranged at the joint of the head part and the column part.

In the paper-plastic mould, the outer diameter of the head part is larger than the inner diameter of the mounting hole.

In the paper-plastic mold, the cross section of the cylindrical part is circular.

In the paper-plastic mold, the mounting hole array is arranged at the corner and the side of the forming mold.

In the paper-plastic mold, the height of the mounting hole is smaller than or equal to half of the height of the forming mold.

In addition, the invention also provides a paper pulp molding product forming device, wherein the paper pulp molding product forming device is provided with the paper-plastic mold.

Has the advantages that:

the invention provides a paper pulp molding product forming device and a paper-plastic mold thereof, which have unique and novel structure, are practical and stable, and can prevent the problem that the existing paper-plastic mold cannot be accurately guided to mold due to deformation of a guide structure caused by expansion with heat and contraction with cold.

The invention designs the fastening screw with unique structure, the forming die is fixedly connected on the die mounting plate by utilizing the external thread part of the fastening screw, the connection strength is high, and the cylindrical part with the inner diameter smaller than that of the mounting hole of the forming die is arranged between the head part and the external thread part, when the forming die is fixedly connected with the die mounting plate, the cylindrical part is positioned in the mounting hole, the forming die can freely expand around the cylindrical part when subjected to thermal expansion, the obstruction of the cylindrical part of the fastening screw is avoided, thereby ensuring that the positioning bolt of the guide structure can be accurately inserted into the positioning socket, keeping high die assembly precision and finally ensuring that the quality of a pulp molding product reaches the standard.

Drawings

Fig. 1 is a schematic structural view of a paper-plastic mold provided by the invention.

Fig. 2 is a structural perspective view of a forming mold in the paper-plastic mold provided by the invention.

Fig. 3 is a top view of the forming die provided in fig. 2.

Fig. 4 is a sectional view of section a-a in fig. 3.

Fig. 5 is a schematic structural view of an inner hexagonal fastening screw in the paper-plastic mold provided by the invention.

Fig. 6 is a schematic structural view of an outer hexagonal fastening screw in the paper-plastic mold provided by the invention.

Fig. 7 is a schematic working diagram of an internal thread portion of a forming mold in the paper-plastic mold provided by the invention.

Detailed Description

The invention provides a paper pulp molding product forming device and a paper-plastic mold thereof, and in order to make the purpose, technical scheme and effect of the invention clearer and clearer, the invention is further described in detail by referring to the attached drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it should be understood that the terms "vertical", "upper", "lower", "horizontal", etc. indicate the orientation or positional relationship of the present invention based on the drawings, and are only for convenience of description and simplicity of description.

Referring to fig. 1, 2, 3, 4, 5 and 6, the present invention provides a paper-plastic mold, which comprises a forming mold 1 with a guiding structure and a mold mounting plate 2, wherein the mold mounting plate 2 is driven by a telescopic cylinder thereon to lift, so as to drive the forming mold 1 to perform mold closing and mold opening, the guiding structure is composed of a positioning socket fixed on a lower mold and a positioning plug fixed on an upper mold, the upper mold and the lower mold are closed at correct positions through the guiding function, so as to effectively provide mold closing precision, and the positioning plug can be mounted in a mounting groove 13 of the forming mold 1 through screws.

The paper-plastic mould further comprises a fastening screw 3 for connecting the forming mould 1 and the mould mounting plate 2.

The forming die 1 is provided with a plurality of axially vertical mounting holes 11, and the inner wall surfaces of the mounting holes 11 can be smooth.

The fastening screw 3 includes a head 31, a column 32, and an external thread 33 integrally connected in this order. The outer diameter of the cylindrical portion 32 is smaller than the inner diameter of the mounting hole 11, and the length of the cylindrical portion 32 is equal to or greater than the height of the mounting hole 11. The external thread portion 33 has an outer diameter smaller than the inner diameter of the mounting hole 11, and the external thread portion 33 has an inner diameter larger than the outer diameter of the cylindrical portion 32.

The die mounting plate 2 is correspondingly provided with a connecting hole 21 which can be in threaded connection with the external thread part 33.

This fastening screw 3 unique novelty, the external screw thread portion that the internal diameter is less than mounting hole 11 is designed on fastening screw 3, not only can be with forming die 1 fixed connection on die holding board 2, have strong joint strength, moreover, can directly insert fastening screw 3 in forming die 1's mounting hole 11, change the current mode of screwing the screw into forming die's screw hole, make external screw thread portion 33 stretch out mounting hole 11 and be connected with die holding board 2's connecting hole 21, and, the head 31 that is located outside mounting hole 31 sticiss at forming die 1, realize that forming die 1 tightly is fixed in die holding board 2, thereby the installation time of greatly reduced fastening screw 3, reach the technical purpose of quick assembly disassembly fastening screw.

And, set up the cylinder portion 32 that is less than the mounting hole 11 internal diameter of forming die 1 between head 31 and external screw thread portion 33, after forming die 1 and die mounting panel 2 fixed connection, cylinder portion 32 is located the mounting hole 11, so, forming die 1 can be expanded freely around it when being heated the inflation, avoid suffering the hindrance of the cylinder portion 32 of fastening screw 3, thereby guarantee that guide structure's location bolt can insert the location socket accurately, keep high compound die precision, finally ensure that pulp moulded product quality is up to standard.

The invention solves the problem that the existing paper-plastic mould cannot accurately guide to mould closing because the guide structure of the existing paper-plastic mould deforms due to expansion with heat and contraction with cold by designing a unique fastening screw.

The forming die 1 can be an upper extrusion die made of cast aluminum material, and the cast aluminum material has excellent casting performance, easy processability and good thermal conductivity and is suitable for forming dies of pulp molded products.

The mounting holes 11 are arranged in an array at the corners and sides of the forming die 1, as shown in fig. 2 and 3. Locate forming die 1's the die cavity outside with mounting hole 11, avoid fastening screw pine to take off so that influence forming die's work to strengthen joint strength, be favorable to fixing forming die 1 at mould mounting panel 2 steadily. In the present embodiment, four mounting holes 11 are provided at regular intervals along the longitudinal direction of the molding die 1 on the long side of the molding die 1, and two mounting holes 11 are provided along the width direction of the short side of the molding die 1.

In addition, the height of the mounting hole 11 is less than or equal to half the height of the molding die 1, as shown in fig. 2 and 4, thereby providing a sufficient height space, facilitating mounting and dismounting of the fastening screw, and enabling the fastening screw to be tightened or removed even in a clamped state.

The manufacturing process of the fastening screw 3 is as follows: the general screw having the external thread portion 33 with an outer diameter smaller than the inner diameter of the mounting hole 11 is manufactured by a screw forming machine, and then the general screw is processed by a turning process to manufacture the cylindrical portion 32 having a smooth surface, and the outer diameter of the cylindrical portion 32 is made smaller than the inner diameter of the external thread portion 33.

The head 31 may be an inner hexagonal head, and the outer side surface of the head 31 has a smooth circumference, as shown in fig. 5, and is screwed down and loosened by an inner hexagonal wrench; alternatively, the head 31 may be an outer hexagonal head having no burr on the surface, and as shown in fig. 6, it is screwed and unscrewed with an outer hexagonal wrench. The connecting part of the head part 31 and the column part 32 is provided with a circular arc transition part 34, so that the contact area between the column part 32 and the head part 31 is increased, the connecting strength between the head part 31 and the column part 32 is enhanced, and the head part 31 and the column part 32 are prevented from being easily broken.

The outer diameter of the head 31 is larger than the inner diameter of the mounting hole 11, as shown in fig. 1, and the two end faces of the head 31 are flat and can be tightly attached to a forming die; and can be directly mounted to the mounting hole 11 of the molding die 1 without using a gasket during mounting. Of course, it is also possible to use spacers during the mounting of the fastening screws 3.

Preferably, the cross-sectional shape of the cylindrical portion 32 is circular, and the cylindrical portion can be directly machined through a turning process in a rotating state of a common screw, so that the machining difficulty is effectively reduced, and the manufacturing time of the fastening screw is shortened. Of course, the cross-sectional shape of the column portion 32 may be square.

As shown in fig. 4, 5 and 7, further, the inner wall of the mounting hole 11 has an internal threaded portion 12 protruding radially inward at an end thereof adjacent to the head portion 31 and adapted to be screwed with the external threaded portion 33; the internal thread portion 12 has an inner diameter larger than an outer diameter of the cylindrical portion 32.

The internal thread portion 12 is provided in the mounting hole 11 for the purpose of preventing the fastening screw 3 from falling off from the molding die 1. When the fastening screw 3 is mounted, the male screw portion 33 is screwed into the female screw portion 12 from the bottom up; then, the male screw portion 33 is screwed to the upper side of the female screw portion 12, and the fastening screw 3 is directly pushed upward until the male screw portion 33 is protruded out of the mounting hole 11 and screwed into the coupling hole 21 of the die mounting plate 2. If the fastening screw 3 is loosened from the mold mounting plate 2, it falls down to directly move down to the female screw portion 12, thereby preventing the loosened fastening screw 3 from falling off from the molding die 1.

If the former fastening mode is adopted, the loosened screw can still be in threaded connection with the forming die, the loosening phenomenon is common and is not easy to find. By adopting the structural design, the loosening phenomenon of the fastening screw can be more remarkable, and the fastening screw can be conveniently tightened by a worker after being discovered in time.

The length of the female screw portion 12 is smaller than the length of the male screw portion 33. By setting the length of the internal thread portion 12 to be smaller than the length of the external thread portion 33, the time for the external thread portion 33 to pass through the internal thread portion 12 can be shortened.

In addition, the invention also provides a paper pulp molding product forming device, wherein the paper pulp molding product forming device is provided with the paper-plastic mold. The paper-plastic mould with the structure is arranged on the paper pulp molding product forming device, so that the mould closing precision can be effectively improved, and the phenomenon that the guide structure cannot normally work due to the fact that the positioning plug pin cannot be accurately inserted into the positioning socket is avoided, so that the quality of the paper pulp molding product is reduced.

In conclusion, the invention provides the paper pulp molding product forming device and the paper-plastic mold thereof, which have unique and novel structures, are practical and stable, and can prevent the problem that the existing paper-plastic mold cannot accurately guide and mold closing due to deformation of a guide structure of the paper-plastic mold caused by expansion with heat and contraction with cold.

The invention designs the fastening screw with unique structure, the forming die is fixedly connected on the die mounting plate by utilizing the external thread part of the fastening screw, the connection strength is high, and the cylindrical part with the inner diameter smaller than that of the mounting hole of the forming die is arranged between the head part and the external thread part, when the forming die is fixedly connected with the die mounting plate, the cylindrical part is positioned in the mounting hole, the forming die can freely expand around the cylindrical part when subjected to thermal expansion, the obstruction of the cylindrical part of the fastening screw is avoided, thereby ensuring that the positioning bolt of the guide structure can be accurately inserted into the positioning socket, keeping high die assembly precision and finally ensuring that the quality of a pulp molding product reaches the standard.

It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.