CN212147281U

CN212147281U - Cloth pressing device of low-pressure injection mold

Info

Publication number: CN212147281U
Application number: CN202020760007.4U
Authority: CN
Inventors: 汪明威; 包唤宇; 项杰
Original assignee: Zhejiag Taizhou Meiduo Mould Co ltd
Current assignee: Zhejiag Taizhou Meiduo Mould Co ltd
Priority date: 2020-05-10
Filing date: 2020-05-10
Publication date: 2020-12-15
Anticipated expiration: 2030-05-10

Abstract

The utility model relates to a low pressure injection mold's compress device, insert with the cover half including the movable mould, the movable mould insert with the cover half cooperation of inserting forms the die cavity, be fixed with a plurality of cloth hanging needle on the cover half is inserted, be equipped with the cloth on the cloth hanging needle, the movable mould is inserted and is provided with two compress mechanisms, compress mechanism includes the cylinder, be fixed with the kicking block on the piston rod of cylinder, the movable mould inserts the system in and has the kicking block groove, the kicking block is located the kicking block inslot, the cylinder is connected with barometer and relief valve through the trachea. Compared with the prior art, the utility model discloses a cylinder control kicking block is ejecting to through relief valve adjusting cylinder, thereby adjust the kicking block to the pressure of cloth, need not dismantle the installation repeatedly, avoid compound die in-process cloth to be broken because of pressure is too big, perhaps because of the too little fold of appearance of pressure, guarantee the appearance quality of product, practice thrift the manpower, improve the efficiency of moulding plastics.

Description

Cloth pressing device of low-pressure injection mold

Technical Field

The utility model relates to a low pressure injection mold's compress device belongs to injection mold technical field.

Background

The low-pressure injection molding process is a process method for smoothly injecting fully molten plastic into a cavity of a mold by using a small injection pressure (less than or equal to 10MPa) and quickly solidifying and molding. In order to enhance or modify the appearance of the product, to enhance the soft touch and texture, it is often necessary to add a thin covering layer to the outer surface of the hard form plastic article. The low pressure injection molding process is suitable for such composite molded plastic products, such as fabrics, carpet layers, fabrics, etc., and the low pressure injection molding process can integrate the fabrics and the plastic parts.

The cloth is laid in the mould, and a reasonable fixing and pressing device is needed, otherwise the cloth is easy to wrinkle, and meanwhile, the plastic is easy to seep out of the surface of the cloth. In order to lay the cloth in the mould, adopt rigidity fixed block directly to compact on the cloth usually, perhaps cooperate elastic component such as metal spring to press the cloth, but these modes have the pressure of being difficult to adjust, the unsatisfactory scheduling problem of compress effect, the too big cloth that tears of drawing easily of pressure, the too little tight cloth that draws of pressure causes the fold, the most suitable pressure needs the trial and error just can confirm, it is very troublesome to dismantle the installation, waste time, manpower and material cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the shortcoming of prior art, provide a cloth pressing device of low pressure injection mold that can adjust pressure.

For realizing the purpose the utility model adopts the technical proposal that:

the cloth pressing device of the low-pressure injection mold comprises a movable mold and a fixed mold, wherein a movable mold insert is arranged on the movable mold, a fixed mold insert is arranged on the fixed mold, the movable mold insert and the fixed mold insert are matched to form a mold cavity, a plurality of cloth hanging needles are fixed on the fixed mold insert, cloth is arranged on the cloth hanging needles, two cloth pressing mechanisms are arranged on the movable mold insert, the two cloth pressing mechanisms respectively correspond to two side edges for pressing cloth, each cloth pressing mechanism comprises an air cylinder, a top block is fixed on a piston rod of the air cylinder, a top block groove is formed in the movable mold insert, the top block is positioned in the top block groove, a limiting groove is formed in the top block, a positioning screw is arranged in the limiting groove, a rod part of the positioning screw penetrates through the top block and is fixed on the movable mold insert, and the distance between the cap head of the positioning screw and the bottom of the limiting groove is, the air cylinder is connected with an air pressure gauge and a pressure release valve through an air pipe.

As a further optimization of the above technical solution: the ejector block is in a long strip shape, the air cylinders are arranged on two sides of the bottom of the ejector block, and the limiting grooves and the positioning screws are also provided with two positions which are respectively located on two sides of the ejector block.

Compared with the prior art, the utility model discloses a cylinder control kicking block is ejecting to through relief valve adjusting cylinder, thereby adjust the kicking block to the pressure of cloth, need not dismantle the installation repeatedly, avoid compound die in-process cloth to be broken because of pressure is too big, perhaps because of the too little fold of appearance of pressure, guarantee the appearance quality of product, practice thrift the manpower, improve the efficiency of moulding plastics.

Drawings

Fig. 1 is a schematic view of the sectional structure of the mold opening state of the present invention.

Fig. 2 is a schematic sectional structure view of the mold closing state of the present invention.

Fig. 3 is a schematic structural diagram of the cloth pressing mechanism of the present invention.

Fig. 4 is a schematic sectional structure diagram of the middle top block and the movable mold insert of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description. As shown in fig. 1-4, the cloth pressing device of the low-pressure injection mold comprises a movable mold and a fixed mold, wherein a movable mold insert 1 is arranged on the movable mold, a fixed mold insert 2 is arranged on the fixed mold, the movable mold insert 1 and the fixed mold insert 2 are matched to form a mold cavity, a plurality of cloth hanging needles 3 are fixed on the fixed mold insert 2, cloth matched with a plastic product is arranged on the cloth hanging needles 3, two cloth pressing mechanisms are arranged on the movable mold insert 1, and the two cloth pressing mechanisms correspond to two side edges for pressing the cloth respectively. The cloth pressing mechanism comprises an air cylinder 4, a top block 5 is fixed on a piston rod of the air cylinder 4, a top block groove 11 is formed in the movable die insert 1, the top block 5 is located in the top block groove 11, a limiting groove 51 is formed in the top block 5, a positioning screw 9 is arranged in the limiting groove 51, and a rod part of the positioning screw 9 penetrates through the top block 5 and is fixed on the movable die insert 1. When the die is closed, the distance between the cap head of the positioning screw 9 and the bottom of the limiting groove 51 is 20 mm.

In the above technical scheme: in order to press the two sides of the cloth more completely, in this embodiment, the top block 5 is a strip, and the cylinders 4 are disposed on the two sides of the bottom of the top block 5. The limiting groove 51 and the positioning screw 9 are also provided with two positions which are respectively positioned at two sides of the top block 5.

In the above technical scheme: as shown in fig. 3, each cylinder 4 is connected with a barometer 7 and a pressure release valve 8 through an air pipe 6, the barometer 7 is convenient for checking the internal air pressure, and the pressure release valve 8 can adjust the pressure of the top block 5 on the cloth by adjusting the pressure inside the cylinder. In the mould production process, operating personnel can be according to the actual conditions that the cloth was pressed, constantly adjust the threshold value knob on the relief valve 8, control cylinder internal pressure, until kicking block 5 is enough to push down the cloth to the pressure of cloth, be unlikely to again to pull the cloth open.

The utility model discloses an operating process is as follows, and cylinder 4 drives kicking block 5 ejecting upwards during the mould die sinking, and the head of kicking block 5 exposes kicking block groove 11 gradually, and the cap head of up to set screw 9 is inconsistent with the tank bottom of spacing groove 51, and kicking block 5 stops ejecting motion, and whole ejecting process is only ejecting 20 mm.

In the die assembly process of the die, the movable die and the fixed die gradually approach, and the top block 5 is contacted with the cloth; and (3) continuing die assembly, pressing the cloth to the parting surface on the fixed die insert 2 by the top block 5, extruding the top block 5 by the fixed die insert 2, gradually moving downwards until the bottom of the top block 5 is abutted against the bottom of the top block groove 11, and finishing die assembly.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, all should fall into the protection scope of the utility model, the technical scheme that the design of this technical field technical personnel according to the utility model can be obtained through logic analysis, reasoning or limited experiment on prior art's basis, all should fall into.

Claims

1. The cloth pressing device of the low-pressure injection mold comprises a movable mold and a fixed mold, wherein a movable mold insert (1) is arranged on the movable mold, a fixed mold insert (2) is arranged on the fixed mold, the movable mold insert (1) and the fixed mold insert (2) are matched to form a mold cavity, a plurality of cloth hanging needles (3) are fixed on the fixed mold insert (2), cloth is arranged on the cloth hanging needles (3), two cloth pressing mechanisms are arranged on the movable mold insert (1), the two cloth pressing mechanisms respectively correspond to two side edges for pressing cloth, the cloth pressing device is characterized in that the cloth pressing mechanism comprises an air cylinder (4), a top block (5) is fixed on a piston rod of the air cylinder (4), a top block groove (11) is formed in the movable mold insert (1), the top block (5) is located in the top block groove (11), a limit groove (51) is formed in the top block (5), and a positioning screw (9) is arranged in the limit groove (51, the rod part of the positioning screw (9) penetrates through the ejector block (5) and is fixed on the movable die insert (1), the distance between the cap head of the positioning screw (9) and the groove bottom of the limiting groove (51) is 20mm when the die is closed, and the air cylinder (4) is connected with an air pressure gauge (7) and a pressure release valve (8) through an air pipe (6).

2. The cloth pressing device of the low-pressure injection mold according to claim 1, wherein the top block (5) is strip-shaped, the air cylinder (4) is arranged on both sides of the bottom of the top block (5), and the limiting groove (51) and the positioning screw (9) are also provided with two positions which are respectively arranged on both sides of the top block (5).