CN213321453U

CN213321453U - Silica gel mold using needle valve sealing glue

Info

Publication number: CN213321453U
Application number: CN202021623940.3U
Authority: CN
Inventors: 许俊豪; 罗俊; 陈海明
Original assignee: Changzhou Xingyu Automotive Lighting Systems Co Ltd
Current assignee: Changzhou Xingyu Automotive Lighting Systems Co Ltd
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2021-06-01
Anticipated expiration: 2030-08-07

Abstract

The utility model relates to a silica gel product technical field that moulds plastics, in particular to use silica gel mould that needle valve sealed glues, including last mould, it has the sprue that the sizing material that supplies liquid flows to go up the mould, and the sprue is branched to at least one subchannel, has the needle valve between subchannel and the die cavity, has the runner between needle valve and the die cavity, goes up the mould and includes outer ring spare, and outer ring spare cover is outside at the needle valve, and packs between outer ring spare and the needle valve outer wall and have cooling medium, the utility model discloses outer ring spare prevents that the silica gel mould from advancing the problem that the high temperature caused the system to block up to water ring structure dismantles simply easily and washs.

Description

Silica gel mold using needle valve sealing glue

Technical Field

The utility model relates to a silica gel product technical field that moulds plastics, in particular to use silica gel mould that needle valve sealed glue.

Background

The requirements on light sources are higher and higher along with the popularization of LED and ADB optics in the automobile lamp industry; the silica gel product has the light transmittance of 91-94% and has high temperature resistance of 200 ℃; therefore, the injection molding research of optical silica gel parts is more urgent. The silica gel injection molding has a long cycle of a thermal curing process, so that a plurality of holes are needed for a mold.

Needle valve (according to the injection principle): cylinder type and spring type. The cylinder type controls the cylinder to push the needle valve to be closed through the controller and the time schedule controller, the structure is complex, and the design is simple. The runner of needle valve formula hot runner combines together with the cylinder, and the structure is very compact, makes the die carrier space that occupies can great reduction, and cooperation bit architecture has the unicity, simple to operate, and the minimum jiao kou cross-section vestige shortens casting time and can improves effects such as production efficiency of product.

The defects and shortcomings of the prior art are as follows:

the existing mold generally adopts an open type pouring gate, a needle valve is not used for sealing glue, and the problem of wire drawing or the problem of side leakage of a silica gel raw material due to poor solidification or unstable temperature at the pouring gate can be caused; or the temperature may be unstable, and the gate may be clogged due to excessive solidification. The micro-control adjustment of the multi-cavity glue amount can not be carried out when the multi-cavity injection molding is carried out by adopting the open type pouring gate, and the problem of inconsistent gram weights of multi-cavity products is solved. The spring needle valve type structure is complex, the opening of the pouring gate is controlled by the top plate, and the pouring gate can be opened or closed simultaneously in multiple cavities. Patent No. CN101633229A discloses a cold runner silicone rubber molding die, which is cooled by a cooling plate, but the cooling plate has poor cooling effect on higher temperature.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the cooling effect that prior art exists is not good, the utility model provides a silica gel mould that use needle valve to seal glue that cooling effect is good.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model provides an use needle valve to seal silica gel mould of glue, includes the mould, last mould have the sprue that the sizing material that supplies liquid flows, sprue branch be at least one runner, runner and die cavity between have the needle valve, the runner has between needle valve and the die cavity, last mould include outer ring spare, outer ring spare cover outside the needle valve, and it has cooling medium to fill between outer ring spare and the needle valve outer wall.

Furthermore, a cooling cavity is formed between the outer ring piece and the outer wall of the needle valve, cooling water is filled in the cooling cavity, and a water inlet and a water outlet which are communicated with the cooling cavity are formed in the outer ring piece.

Furthermore, the water inlet and the water outlet are openings formed in the side wall of the outer ring piece, at least two sealing rings are arranged between the outer ring piece and the high-temperature template, and the water inlet and the water outlet of the outer ring piece are positioned between the two sealing rings.

Furthermore, the upper die comprises a high-temperature die plate, the die cavity is formed in the high-temperature die plate, the outer ring piece penetrates through the high-temperature die plate of the die, the upper die further comprises a normal-temperature die plate, a heat insulation plate is arranged between the high-temperature die plate and the normal-temperature die plate, a flow distribution plate is arranged in the normal-temperature die plate, and the flow distribution channel is arranged in the flow distribution plate.

Furthermore, a cooling water channel is arranged in the normal-temperature template, and the closest distance between the cooling water channel and the flow distribution plate is 8-10 mm.

Furthermore, a sealing ring for sealing the cooling cavity is arranged between the outer ring piece and the outer wall of the needle valve.

Further, the mould still includes into gluey template, the sprue set up on advancing gluey template, advance to be equipped with the cooling water route on the gluey template.

Has the advantages that:

(1) the outer ring piece of the utility model prevents the problem of system blockage caused by overhigh glue inlet temperature of the silica gel mold, and the water ring structure is simple to disassemble and easy to clean;

(2) the cooling water path and the cooling water path have simple structures, and the temperature control of the glue solution is ensured;

(3) the utility model has simple structure, realizes the purpose that one main glue inlet is divided into a plurality of sub glue inlets, and can respectively control the glue amount of the sub glue inlets;

(4) the utility model realizes the temperature partition control isolation;

(5) the utility model relates to an use needle valve to proclaim oneself structure that silica gel advances jiao kou, can seal silica gel completely and prevent to overflow and water the scheduling problem.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a front view of the mold of the present invention;

fig. 2 is a bottom view of the mold of the present invention;

FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2;

FIG. 5 is a cross-sectional view of a glue feeding template;

FIG. 6 is a block diagram of the outer ring member;

fig. 7 is a structural view of a needle valve (not including a valve needle).

The device comprises a main runner, a branch runner, a needle valve, an outer ring piece, a water inlet, a water outlet, a sealing ring, a high-temperature template, a normal-temperature template, a heat insulation plate, a flow distribution plate, a sealing ring, a normal-temperature template, a glue inlet template, a cooling water channel, a flow distribution plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

Referring to fig. 1 to 7, a silicone mold using a needle valve 3 for sealing a sealant structure comprises an upper mold, wherein the upper mold is provided with a main runner 1 for flowing of liquid rubber, the main runner 1 is branched into at least one branch runner 2, a needle valve 3 is arranged between the branch runner 2 and a mold cavity 13, a pouring gate is arranged between the needle valve 3 and the mold cavity 13, the upper mold comprises an outer ring member 4, the outer ring member 4 is sleeved outside the needle valve 3, and a cooling medium is filled between the outer ring member 4 and the outer wall of the needle valve 3. A cooling cavity is formed between the outer ring member 4 and the outer wall of the needle valve 3, cooling water is filled in the cooling cavity, and a water inlet 41 and a water outlet 42 which are communicated with the cooling cavity are arranged on the outer ring member 4. The cooling chamber may be a single strip, may be a turn, may be a spiral, etc., or may be an overall ring.

As shown in fig. 6, the water inlet 41 and the water outlet 42 are openings formed in the side wall of the outer ring member 4, the sealing rings 5 are arranged between the outer ring member 4 and the high-temperature template 6, the number of the sealing rings 5 is at least two, and the water inlet 41 and the water outlet 42 of the outer ring member 4 are located between two of the sealing rings 5.

As shown in fig. 4, the upper die comprises a high-temperature die plate 6, a die cavity 13 is formed in the high-temperature die plate 6, the outer ring member 4 is arranged in the high-temperature die plate 6 of the die in a penetrating manner, the upper die further comprises a normal-temperature die plate 7, a heat insulation plate 8 is arranged between the high-temperature die plate 6 and the normal-temperature die plate 7, a flow distribution plate 9 is arranged in the normal-temperature die plate 7, and the flow distribution channels 2 are arranged in the.

The normal temperature template 7 is internally provided with a cooling water channel, and the shortest distance between the cooling water channel and the flow distribution plate 9 is 8-10 mm.

As shown in fig. 4, a sealing ring 10 for sealing the cooling chamber is provided between the outer ring member 4 and the outer wall of the needle 3.

As shown in fig. 5, the mold further includes a mold plate 11, the main runner 1 is disposed on the mold plate 11, and the mold plate 11 is provided with a cooling water path 12.

As shown in fig. 1-2, the mold is provided with 2 groups of electromagnetic valves, the 2 groups of air passages are respectively controlled, and the purpose of opening and closing the air passages of the electromagnetic valves is achieved through electromagnetic control signals; make the air flue of arbitrary a set of open or close independent control, 2 air cylinders of group of installation control respectively in the system 2 groups go out opening or closing of gluing the point, follow a main gluey point and control 2 respectively and go out gluing the point. The cylinder drives the valve needle of the needle valve 3 to move.

As shown in fig. 1, the temperature of the mold needs to be kept at normal temperature during the injection molding of the silica gel raw material, and the temperature of the mold needs to be kept at high temperature, generally about 150 ℃ during the molding, so that the temperature needs to be controlled in a subarea manner, and a water path for keeping the normal temperature of the mold can be arranged on the side; the electromagnetic valve for controlling the cylinder to open and close and the control signal thereof are arranged at the top of the mould.

As shown in fig. 3 to 4, the difficulty of the silica gel glue feeding system is how to ensure the temperature of the glue feeding system to be constant, especially, the temperature of the glue feeding system extending into the high temperature region is controlled, the glue feeding system extending into the high temperature region needs to adopt a water ring structure, and a water path of the glue feeding system wraps a channel of the glue feeding system, so that the channel is kept at a constant temperature.

As shown in fig. 4, the mold structure with a main glue inlet divided into 2 glue dividing points includes a plurality of splitter plate structures; and cooling water channels (not shown in the figure) are arranged around the sub-channels, and the distance between each cooling water channel and the corresponding flow distribution plate is 8-10 mm, so that the temperature of the flow distribution plates is kept constant.

Referring to fig. 5, the cooling water path 12 of the mold glue inlet module 11 is configured to keep the glue inlet module 11 cooled at a constant temperature by the cooling water path 12 around the glue inlet module 11.

As shown in fig. 4 and 6, the outer ring member 4 is internally provided with a sealing groove, and the outer wall is provided with a sealing groove for installing the sealing ring 5 and the sealing ring 10.

As shown in FIG. 7, the needle valve 3 has a hollow structure with a flow channel in the middle, glue is conveyed from the outer ring part 4 to the flow channel in the middle of the needle valve 2, and the needle valve penetrates through the middle to realize sealing glue.

Above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the design of the present invention, equivalent replacement or change should be covered within the protection scope of the present invention.

Claims

1. The silicone rubber mold for sealing the glue by using the needle valve is characterized by comprising an upper mold, wherein the upper mold is provided with a main runner (1) for flowing of liquid glue, the main runner (1) is branched into at least one sub-runner (2), the needle valve (3) is arranged between the sub-runners (2) and a mold cavity (13), a pouring gate is arranged between the needle valve (3) and the mold cavity (13), the upper mold comprises an outer ring piece (4), the outer ring piece (4) is sleeved outside the needle valve (3), and a cooling medium is filled between the outer ring piece (4) and the outer wall of the needle valve (3).

2. The silicone mold using needle valve sealing compound of claim 1, wherein: a cooling cavity is formed between the outer ring piece (4) and the outer wall of the needle valve (3), cooling water is filled in the cooling cavity, and a water inlet (41) and a water outlet (42) which are communicated with the cooling cavity are arranged on the outer ring piece (4).

3. The silicone mold using needle valve sealing compound of claim 2, wherein: the water inlet (41) and the water outlet (42) are openings formed in the side wall of the outer ring piece (4), the sealing rings (5) are arranged between the outer ring piece (4) and the high-temperature template (6), the number of the sealing rings (5) is at least two, and the water inlet (41) and the water outlet (42) of the outer ring piece (4) are located between the two sealing rings (5).

4. The silicone mold using needle valve sealing compound of claim 1, wherein: the upper die comprises a high-temperature die plate (6), a die cavity (13) is formed in the high-temperature die plate (6), the outer ring piece (4) penetrates through the high-temperature die plate (6) of the die, the upper die further comprises a normal-temperature die plate (7), a heat insulation plate (8) is arranged between the high-temperature die plate (6) and the normal-temperature die plate (7), a flow distribution plate (9) is arranged in the normal-temperature die plate (7), and the flow distribution channel (2) is arranged in the flow distribution plate (9).

5. The silicone mold using needle valve sealing compound as claimed in claim 4, wherein: the normal temperature template (7) in have a cooling water course, cooling water course and flow distribution plate (9) between the nearest distance be 8 ~ 10 mm.

6. The silicone mold using needle valve sealing compound of claim 1, wherein: a sealing ring (10) for sealing the cooling cavity is arranged between the outer ring piece (4) and the outer wall of the needle valve (3).

7. The silicone mold using needle valve sealing compound of claim 1, wherein: the mold further comprises a glue inlet template (11), the main runner (1) is arranged on the glue inlet template (11), and a cooling water channel (12) is arranged on the glue inlet template (11).