CN215825851U

CN215825851U - Air-line-preventing glue feeding structure of injection mold

Info

Publication number: CN215825851U
Application number: CN202122253620.4U
Authority: CN
Inventors: 杨国润
Original assignee: Kunshan Goldberry Electronics Co ltd
Current assignee: Kunshan Goldberry Electronics Co ltd
Priority date: 2021-09-17
Filing date: 2021-09-17
Publication date: 2022-02-15
Anticipated expiration: 2031-09-17

Abstract

The utility model discloses an air-vein-preventing glue-feeding structure of an injection mold, which comprises: the lower mold core and the upper mold core surround to form a cavity for molding a product, a glue inlet flow channel is arranged on the lower mold core, the glue inlet flow channel is provided with a pouring gate and a cold material well positioned below the pouring gate, and the pouring gate is connected to the position, used for molding the inner side surface of the product, of the cavity; the lower die core is provided with an inclined top insert capable of sliding relatively, an insert is arranged at the top of the inclined top insert, the glue inlet runner is communicated with the die cavity by winding the bottom of the insert, and the inclined top insert can slide laterally relative to the product during die opening so that the insert is separated from a stub bar in the glue inlet runner. This injection mold prevents that gas line advances glued structure can be applicable to and carry out injection moulding to transparent product to the higher especially of product appearance quality requirement, and the runner design does not influence the outward appearance face, does not have the gas line, advances gluey volume sufficient.

Description

Air-line-preventing glue feeding structure of injection mold

Technical Field

The utility model relates to the technical field of injection molds, in particular to an air-line-resistant glue inlet structure of an injection mold.

Background

The injection mold is a common mold for molding plastic products, and the plastic products with various forms can be molded through the injection mold so as to meet various requirements of people.

At present, in the process of injection molding of products, the traditional glue injection mode generally injects glue materials into a cavity directly through a glue injection runner, and the mode has the following defects: 1. A gate mark exists on the surface of the product, and the gate is not easy to trim, so that the product appearance is influenced; 2. the product surface is easy to generate air lines, material punching marks and the like, so that the product appearance can not meet the requirements, and the product quality is not high; 3. the glue feeding amount is insufficient, and the product production yield is low. Accordingly, there is a need for improvements in the art that overcome the deficiencies in the prior art.

Disclosure of Invention

The utility model aims to solve the problem of providing an air-line-preventing glue inlet structure of an injection mold, and aims to overcome the defects that a traditional glue inlet mode is easy to cause sprue marks and air lines on the surface of a product, the attractiveness of the product is influenced, the appearance of the product cannot meet the requirement, and the quality of the product is not high due to insufficient glue inlet amount.

The technical scheme adopted by the utility model for solving the technical problem is as follows: the utility model provides an injection mold prevents that air line advances glued structure, includes: the lower mold core and the upper mold core surround to form a cavity for molding a product, a glue inlet flow channel is arranged on the lower mold core, the glue inlet flow channel is provided with a pouring gate and a cold material well positioned below the pouring gate, and the pouring gate is connected to the position, used for molding the inner side surface of the product, of the cavity; the lower die core is provided with an inclined top insert capable of sliding relatively, an insert is arranged at the top of the inclined top insert, the glue inlet runner is communicated with the die cavity by winding the bottom of the insert, and the inclined top insert can slide laterally relative to the product during die opening so that the insert is separated from a stub bar in the glue inlet runner.

As a further improvement of the utility model, the mold further comprises a lower template and a push plate, wherein the lower mold core is fixedly arranged at the top of the lower template, the push plate is movably arranged below the lower template, a plurality of first ejector pins are arranged on the push plate, and the top ends of the first ejector pins penetrate through the lower template and the lower mold core and extend into the mold cavity.

As a further improvement of the utility model, a movable slide block is arranged on the push plate, and the lower end of the pitched roof insert penetrates through the lower template and is fixedly connected to the slide block.

As a further improvement of the utility model, the slide block is provided with a guide hole, the bottom of the lower template is fixedly provided with an inclined guide post, and the inclined guide post is in sliding fit in the guide hole.

As a further improvement of the utility model, a second thimble is further mounted on the push plate, and the top end of the second thimble penetrates through the lower template and the lower die core and extends into the glue inlet runner.

As a further improvement of the utility model, one end of the insert close to the sprue is positioned at the bottom of the inner side surface of the formed product.

As a further improvement of the present invention, the gate has a thickness smaller than that of the product and has a certain width.

The utility model has the beneficial effects that: the utility model provides an air-vein-preventing glue inlet structure of an injection mold, which can be suitable for injection molding of products with higher requirements on appearance quality, particularly transparent products, wherein a glue inlet runner is arranged on a lower mold core, and a sprue of the glue inlet runner is connected to a position, used for molding the inner side surface of the product, on a cavity, so that sprue marks can be effectively prevented from being generated on the appearance surface of the product, and the attractiveness of the appearance of the product is ensured; the lower mold core is provided with a pitched roof insert which can slide relatively, the rubber inlet flow passage is communicated with the cavity by winding the bottom of the insert passing through the pitched roof insert, and the pitched roof insert can slide laterally relative to the product during mold opening so that the insert is separated from a stub bar in the rubber inlet flow passage, so that the product can be smoothly demoulded; meanwhile, a cold material well is arranged below the pouring gate in the glue inlet flow channel, and can store cold materials, so that the cold materials are prevented from being injected into the cavity to generate air lines on the surface of a product, the appearance of the product can meet the requirement, and the quality of the product is improved; the size of the sprue is configured according to the size of the product, so that not only can the glue feeding be ensured to be sufficient, but also the trimming can be facilitated, and the production yield of the product is improved.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a perspective view of the lower mold core and the pitched roof insert of the present invention;

fig. 4 is a schematic structural diagram of a product, a glue inlet runner and a pitched-roof insert of the present invention.

The following description is made with reference to the accompanying drawings:

1-lower mold core; 101-enter the glue runner;

1011-a gate; 1012-cold charge well;

2-product; 3-pitched roof insert;

301-insert; 4-lower template;

5-push plate; 6-first thimble;

7-a slide block; 8-inclined guide post.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1 to 4, the present invention provides an anti-air-streak glue-feeding structure for an injection mold, including: a lower mold core 1 and an upper mold core (not shown in the figure), wherein the lower mold core 1 and the upper mold core surround to form a cavity for molding a product 2. The lower mold core 1 is positioned on the upper surface and is provided with a glue inlet flow channel 101 close to the cavity, and the glue inlet flow channel 101 is communicated with the cavity and used for injecting hot-melt glue into the cavity to form a product 2. The glue inlet flow channel 101 is provided with a gate 1011, and the gate 1011 is connected to the position on the cavity for molding the inner side surface of the product 2. It should be noted that the inner side surface of the product 2 is a bottom side surface showing the thickness of the product, and the gate 1011 is arranged at this position, so that glue is fed, the appearance of the product 2 is not affected, gate marks on the appearance surface of the product 2 can be effectively avoided, and the attractiveness of the appearance of the product is ensured.

Referring to fig. 2 and 4, the lower mold core 1 is provided with a relatively slidable pitched-roof insert 3, an upper end portion of the pitched-roof insert 3 is provided with an integrally formed insert 301, and the insert 301 is located on the glue inlet flow passage 101. The glue inlet flow passage 101 is communicated with the cavity by winding the bottom of the insert 301 of the pitched-roof insert 3, so that the glue inlet mode of the application is realized. The pitched-roof insert 3 can slide laterally relative to the product 2 during mold opening to separate the insert 301 from a stub bar in the glue inlet flow channel 101, so that the product 2 can be smoothly demoulded.

Specifically, refer to fig. 2, this application injection mold prevents that air mark advances glued structure still includes lower bolster 4 and push pedal 5, and lower mold core 1 fixed mounting is at 4 tops of lower bolster, and the activity of push pedal 5 sets up in the below of lower bolster 4, is provided with a plurality of first thimbles 6 on the push pedal 5, and lower bolster 4 and lower mold core 1 are run through on the top of first thimble 6 and extend to the die cavity for upwards ejecting product 2 when the drawing of patterns. The push plate 5 is also provided with a second ejector pin, the top end of the second ejector pin penetrates through the lower template 4 and the lower die core 1 and extends into the glue inlet flow channel 101, the second ejector pin can move upwards synchronously along with the push plate 5, and when the first ejector pin 6 ejects the product 2, the stub bar is ejected upwards from the glue inlet flow channel 101 through the second ejector pin. Wherein, still install mobilizable slider 7 on the push pedal 5, the lower extreme of pitched roof mold insert 3 runs through lower bolster 4 fixed connection on slider 7, and pitched roof mold insert 3 can remove for lower bolster 4 relatively. An inclined guide post 8 is fixedly installed at the bottom of the lower template 4, a guide hole is formed in the sliding block 7, and the inclined guide post 8 is in sliding fit in the guide hole. Further, an end of the insert 301 close to the gate 1011 is located at the bottom of the inner side surface of the molded product 2. The concrete mold opening process is as follows: the power device drives the push plate 5 to move upwards, the push plate 5 drives the first ejector pin 6, the second ejector pin and the pitched roof insert 3 to synchronously move upwards, the product 2 and the stub bar are jacked upwards under the pushing of the first ejector pin 6, the second ejector pin and the insert 301, and in the process, the sliding block 7 drives the pitched roof insert 3 to simultaneously move laterally in the upwards moving process under the guiding of the pitched guide pillar 8, so that the pitched roof insert is separated from the stub bar in the glue inlet flow passage 101, and the demoulding is smoothly carried out.

Referring to fig. 2 and 4 again, a cold material well 1012 is disposed below the gate 1011 in the glue inlet channel 101, and the cold material well 1012 can store cold materials, so as to prevent the cold materials from being injected into the cavity to generate air lines on the surface of the product 2, ensure that the appearance of the product 2 can meet the requirement, and improve the product quality.

Referring to fig. 3 and 4, the gate 1011 has a thickness smaller than that of the product 2 and has a certain width. The thickness of the product 2 injected in this embodiment is 4mm, and the length is 250mm, so it is preferable to configure the thickness of the gate 1011 to be 1.5mm, and the width to be 10mm, and the gate 1011 is designed to have such a size, which not only can ensure sufficient glue injection, but also can facilitate trimming. It is understood that the size of the gate 1011 is configured according to the size of the product 2, and the specific size thereof is not limited in this application.

Therefore, the anti-air-mark glue feeding structure of the injection mold can be suitable for injection molding of products with high requirements on appearance quality, particularly transparent products, and can effectively avoid the generation of gate marks on the appearance surface of the products and ensure the attractiveness of the appearance of the products by arranging the glue feeding runner on the lower mold core and connecting the gate of the glue feeding runner to the position of the cavity for molding the inner side surface of the products; the lower mold core is provided with a pitched roof insert which can slide relatively, the rubber inlet flow passage is communicated with the cavity by winding the bottom of the insert passing through the pitched roof insert, and the pitched roof insert can slide laterally relative to the product during mold opening so that the insert is separated from a stub bar in the rubber inlet flow passage, so that the product can be smoothly demoulded; meanwhile, a cold material well is arranged below the pouring gate in the glue inlet flow channel, and can store cold materials, so that the cold materials are prevented from being injected into the cavity to generate air lines on the surface of a product, the appearance of the product can meet the requirement, and the quality of the product is improved; the size of the sprue is configured according to the size of the product, so that not only can the glue feeding be ensured to be sufficient, but also the trimming can be facilitated, and the production yield of the product is improved.

In the previous description, numerous specific details were set forth in order to provide a thorough understanding of the present invention. The foregoing description is only a preferred embodiment of the utility model, which can be embodied in many different forms than described herein, and therefore the utility model is not limited to the specific embodiments disclosed above. And that those skilled in the art may, using the methods and techniques disclosed above, make numerous possible variations and modifications to the disclosed embodiments, or modify equivalents thereof, without departing from the scope of the claimed embodiments. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention.

Claims

1. The utility model provides an injection mold prevents that air line advances glued structure, includes lower mold core (1) and goes up the mold core, lower mold core (1) with it surrounds the die cavity that constitutes and is used for shaping product (2) to go up the mold core, its characterized in that: a glue inlet flow channel (101) is arranged on the lower mold core (1), a pouring gate (1011) and a cold material well (1012) positioned below the pouring gate (1011) are arranged on the glue inlet flow channel (101), and the pouring gate (1011) is connected to the position, on the cavity, for molding the inner side surface of the product (2); the lower mold core (1) is provided with a pitched roof insert (3) capable of sliding relatively, an insert (301) is arranged at the top of the pitched roof insert (3), the glue inlet runner (101) is communicated with the mold cavity by winding the bottom of the insert (301), and the pitched roof insert (3) can slide laterally relative to the product (2) during mold opening to enable the insert (301) to be separated from a stub bar in the glue inlet runner (101).

2. The air-groove glue inlet preventing structure of an injection mold according to claim 1, characterized in that: still include lower bolster (4) and push pedal (5), lower mold core (1) fixed mounting is in lower bolster (4) top, push pedal (5) activity sets up the below of lower bolster (4), be provided with a plurality of first thimbles (6) on push pedal (5), the top of first thimble (6) is run through lower bolster (4) with lower mold core (1) extends to in the die cavity.

3. The air-groove glue inlet preventing structure of an injection mold according to claim 2, characterized in that: the push plate (5) is provided with a movable sliding block (7), and the lower end of the pitched roof insert (3) penetrates through the lower template (4) and is fixedly connected to the sliding block (7).

4. The air-groove glue inlet preventing structure of an injection mold according to claim 3, characterized in that: the sliding block (7) is provided with a guide hole, the bottom of the lower template (4) is fixedly provided with an inclined guide post (8), and the inclined guide post (8) is arranged in the guide hole in a sliding fit mode.

5. The air-groove glue inlet preventing structure of an injection mold according to claim 2, characterized in that: and a second ejector pin is further installed on the push plate (5), and the top end of the second ejector pin penetrates through the lower template (4) and the lower mold core (1) and extends into the glue inlet flow channel (101).

6. The air-groove glue inlet preventing structure of an injection mold according to claim 1, characterized in that: one end of the insert (301) close to the sprue (1011) is positioned at the bottom of the inner side surface of the formed product (2).

7. The air-groove glue inlet preventing structure of an injection mold according to claim 1, characterized in that: the thickness of the gate (1011) is smaller than the thickness of the product (2).