CN216465947U

CN216465947U - Novel self-sealing valve

Info

Publication number: CN216465947U
Application number: CN202122652624.XU
Authority: CN
Inventors: 李贤军
Original assignee: Dalian Nissin Precision Plastic Molding Co ltd
Current assignee: Dalian Nissin Precision Plastic Molding Co ltd
Priority date: 2021-11-02
Filing date: 2021-11-02
Publication date: 2022-05-10
Anticipated expiration: 2031-11-02

Abstract

The utility model discloses a novel self-closing valve, which comprises a shell, wherein the shell consists of a front shell (1) and a rear shell (2) which are connected with each other, one end of the shell is fixedly connected with the end surface of a sprue bush interchanging block (3), the other end of the shell is communicated with the inlet end of a hot runner of a mold, a support frame (4) is arranged in the shell (1), a shunting cone (5) is arranged in the support frame (4), the shunting cone (5) is integrally fusiform, a valve needle (6) is movably connected in the shunting cone (5), one end of the valve needle (6) is matched with a feeding port (7) formed in the shell, an elastic metal cage (8) is further connected on the support frame (4), a through hole is formed in the center of the elastic metal cage (8), the shunting cone (5) is movably connected with the through hole, and a limiting step (9) is further arranged on the shunting cone (5), the outer contour of the limiting step (9) is larger than the through hole.

Description

Novel self-sealing valve

Technical Field

The utility model relates to the field of injection molds, in particular to a novel self-closing valve.

Background

During the injection of many injection molds, particularly glass-edge-cladding molds, the nozzle of the molding machine is intermittently disengaged from the sprue bushing. When the nozzle is separated from the sprue bush, the glue inlet side becomes an opening, and the sol can generate salivation through the opening. After drooling, can leave the cavity at the feed end, can influence the shaping measurement when the one shot forming next, still have certain probability to produce unfavorable consequences such as bubble simultaneously, also cause the material waste in addition. Many molds do not avoid the need for nozzle stripping during molding. The above-mentioned adverse effects cannot be avoided as long as the separation is avoided, and the hot runner is most obvious.

The conventional method in the current market is that a needle valve is driven by an air cylinder to move along the direction vertical to the flowing direction of a flow channel, and the flow channel is blocked by the needle valve, but the structure cannot be completely blocked due to large volume, and an additional electric control system is required to control the opening and closing of the structure, so that higher additional cost is generated.

There is therefore a need for a method or apparatus that addresses the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provides a novel self-closing valve which is simple in structure, ingenious in design and low in cost, can be automatically opened when materials are injected and can be automatically closed when the injection is stopped.

The technical solution of the utility model is as follows: a novel self-closing valve is characterized in that: the self-closing valve comprises a shell, wherein the shell is composed of a front shell 1 and a rear shell 2 which are connected with each other, one end of the shell is fixedly connected with the end face of a sprue bush exchange block 3, the other end of the shell is communicated with the inlet end of a hot runner of a mold, a support frame 4 is arranged in the shell 1, a sprue spreader 5 is arranged in the support frame 4, the sprue spreader 5 is integrally shuttle-shaped, a valve needle 6 is movably connected in the sprue spreader 5, one end of the valve needle 6 is matched with a feeding port 7 formed in the shell, an elastic metal cage 8 is further connected to the support frame 4, a through hole is formed in the center of the elastic metal cage 8, the valve needle 6 is movably connected with the through hole, a limiting step 9 is further arranged on the valve needle 6, and the outline of the limiting step 9 is larger than the through hole.

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

this kind of structural style's novel from sealing valve, its simple structure, it is in the course of the work to some traditional moulds, and it is required to break away from with the runner cover according to certain frequency to the problem that the material flows out after the mouth breaks away from that leads to of penetrating designs a special valve body structure. The valve body is provided with a metal cage made of elastic metal material for providing pressure for the valve needle for plugging the feeding port, so that the valve needle can plug the inlet of the sprue bush at all times on one hand and can be automatically opened under the action of injection molding pressure on the other hand, and normal operation of injection molding is guaranteed. Because it directly sets up in the pan feeding mouth department of sprue bush, consequently can not leave the cavity outside the sprue bush to guaranteed the shaping quality of goods, it utilizes the elastic component as the power supply simultaneously, and the whole process of closing and opening is full automatic to be accomplished, does not need artifical watch on and intervenes, saves the manual work, improves work efficiency. And the manufacturing process is simple, the manufacturing cost is low, so that the novel LED lamp has multiple advantages, is particularly suitable for popularization and application in the field, and has a very wide market prospect.

Drawings

Fig. 1 is a schematic perspective view of a valve core part in an embodiment of the utility model.

Fig. 2 is a sectional view (closed state) of the embodiment of the present invention.

Fig. 3 is a sectional view (on state) of the embodiment of the present invention.

Detailed Description

The following description will explain embodiments of the present invention with reference to the accompanying drawings. As shown in fig. 1, 2, and 3: the utility model provides a novel self-sealing valve, it includes the casing, and here casing comprises interconnect's procapsid 1 and back casing 2 two parts, the one end and the pouring basin of casing exchange the terminal surface fixed connection of piece 3, the other end then is linked together with the entry end of mould hot runner, is provided with support frame 4 in casing 1, be provided with spreader 5 in the support frame 4, spreader 5 wholly be fusiformis, swing joint has needle 6 in spreader 5, pan feeding mouth 7 that sets up on the one end of needle 6 and the casing matches each other, still be connected with elastic metal cage 8 on support frame 4, the via hole has been seted up in elastic metal cage 8's center department, needle 6 with via hole swing joint still is provided with spacing step 9 on needle 6, spacing step 9's outline is greater than the via hole.

The working process of the novel self-closing valve provided by the embodiment of the utility model is as follows: after the device is arranged, the valve needle 6 is ejected outwards under the action of the elastic metal cage 8, and the end part of the valve needle 6 is always clamped at the feeding port 7 to seal the feeding port 7;

when the injection molding machine injects materials in a molten state into the cavity, under the pressure of the materials, the valve needle 6 is ejected, the valve needle 6 moves towards the direction far away from the feeding port 7, and as the limiting step 9 on the valve needle 6 is in contact with the elastic metal cage 8 and the outline of the limiting step is larger than that of the through hole, the elastic metal cage 8 elastically deforms (is compressed) in the moving process of the valve needle 6;

after entering the inner cavity of the shell, the material passes through the elastic metal cage 8 and the support frame 4 and then flows backwards, finally enters a hot runner of the mold and is extruded into the cavity, and a product is formed after cooling;

after the pressure is released at the material inlet 7, the elastic metal cage 8 can push the valve needle 6 to move reversely, and the valve needle 6 closes the material inlet 7 again.

This kind of valve body structure is when closing, and the feed end can not leave the cavity, and it utilizes the elastic potential energy of elasticity metal cage 8 to come automatic drive needle 6 to do the shutoff action simultaneously, just need not maintain once the installation after, and whole operation process is full-automatic goes on, and is very convenient.

Claims

1. A novel self-closing valve is characterized in that: the self-closing valve comprises a shell, the shell consists of a front shell (1) and a rear shell (2) which are connected with each other, one end of the shell is fixedly connected with the end face of a sprue bush interchanging block (3), the other end of the shell is communicated with the inlet end of a hot runner of a mold, a support frame (4) is arranged in the front shell (1), a shunting cone (5) is arranged in the support frame (4), the shunting cone (5) is integrally fusiform, a valve needle (6) is movably connected in the shunting cone (5), one end of the valve needle (6) is matched with a feeding port (7) formed in the shell, an elastic metal cage (8) is further connected on the support frame (4), a via hole is formed in the center of the elastic metal cage (8), the valve needle (6) is movably connected with the via hole, and a limiting step (9) is further arranged on the valve needle (6), the outer contour of the limiting step (9) is larger than the through hole.