CN103158232A - A mold suitable for producing inner undercut products - Google Patents

Abstract

The invention discloses a die suitable for producing an inside back-off product, which utilizes two ejection actions, wherein the first ejection action firstly ejects a large push block together with the product out of a rear die core; the product is ejected to a certain inclination angle by the ejection force of the secondary ejection ejector pad in the moment in the second ejection action, the product is separated from the large ejector pad, the product can be easily taken out at the moment, the product cannot be damaged, convenience in demolding and injection molding of the product can be guaranteed, and the attractive appearance and the working performance of the product can be guaranteed.

Description

A mold suitable for producing inner undercut products

technical field

The invention relates to the field of moulds, in particular to a mold suitable for producing inner undercut products.

Background technique

At present, with the continuous progress of society, the continuous development of science and technology, and the continuous increase of labor costs, the current products must not only meet their own functional requirements, but also must meet fashion and aesthetics, and must also constantly control costs. Improve product quality, so that your products can win the market and seize the market. In view of the needs of the product and the market, the requirements for the processing technology and production method of the mold of the product are higher and more ingenious. In order to meet the usage requirements of many products, the entire inner circle of the product is undercut. The conventional method of mold making is to use inclined ejector, which will affect the appearance of the product and the special performance of the product; Will lead to the generation of many bad products.

Contents of the invention

In view of the above-mentioned defects, the technical problem to be solved by the present invention is to provide a mold suitable for producing inner undercut products, which will not damage the products, can not only ensure the convenience of product buckle release from the mold and injection molding, but also ensure that the products are beautiful Appearance and its working performance.

In order to solve the above technical problems, the mold suitable for producing inner undercut products provided by the present invention includes a male template and a female template, wherein:

The male formwork is provided with a guide post, the female formwork is provided with a guide sleeve hole socketed on the guide post, the upper part of the male formwork is also provided with a rear mold core, and the lower part of the female formwork is also provided with a The front mold core, the rear mold core is provided with a large push block, and the front mold core, the rear mold core and the large push block are cooperatively pressed to form an inner undercut product;

The upper side of the master template is connected to the hot runner plate, and the upper side of the hot runner plate is connected to the upper fixing plate. The upper fixing plate is provided with a positioning ring, and the lower side of the positioning ring is provided with a ring extending into the hot runner plate. Hot mouth;

The lower side of the male formwork is connected with the square iron, the lower side of the square iron is connected with the lower fixing plate, and the male formwork, the square iron and the lower fixing plate jointly form a cavity; There is a first group of ejector plates consisting of a No. 1 ejector plate and a No. 2 ejector plate and a second group of ejector plates composed of a No. 3 ejector plate and a No. 4 ejector plate, the No. 1 ejector plate and the No. 2 ejector plate The No. 3 thimble plate and the No. 4 thimble plate are connected by bolts, and the No. 2 thimble plate and the No. 3 thimble plate are connected by a rubber plug interference fit;

The ejector column passes through the first group of ejector plates and directly bears against the No. 3 ejector plate, and the large push block link connected to the No. 2 ejector plate passes through the second group of ejector plates and the male template ejector. Hold the big push block, the inner wall of the square iron is provided with a clamping platform, and the first group of thimble plates are displaced upward by a certain distance and then limited by the clamping platform; The connecting rod is connected with the No. 4 ejector plate, and the secondary ejection push block is driven upward by the No. 4 ejector plate. When the secondary ejection push block moves upward, the formed inner undercut product is ejected. .

Preferably, the surface of the upper fixing plate is covered with an upper heat insulation plate, and the surface of the lower fixing plate is covered with a lower heat insulation plate.

Preferably, a limiting block is provided on the No. 4 ejector plate, and when the second group of ejector plates moves upward for a certain distance, the limiting block bears against the bottom of the male template.

Preferably, the male template and the female template are provided with positioning side locks that cooperate with each other.

The mold provided by the invention is applicable to the production of inner undercut products. After the product is injection molded, the mold is opened from the parting surface, and the female template and the front mold core are separated from the male template, the rear mold core, the large push block and the product; then The first set of thimble plates and the second set of thimble plates are pushed out by the ejector column together. When the ejection reaches a certain distance, that is, when the No. 2 thimble plate of the first set of thimble plates is limited by the limiting platform of the square iron , the first group of thimble plates stops ejecting, and the first ejection is completed. At this time, the large push block and the second ejector block also move upward along with the first set of thimble plates and the second set of thimble plates, and the large push block Together with the mold core after the product is separated, when the first set of ejector plates stops ejecting, the large push block and the product stop ejecting accordingly; the ejector column continues to drive the second set of ejector plates to move upwards, and then continues to drive the push block linkage and the secondary The product is ejected from the ejection block, and the product is pushed to a certain inclination angle and separated from the large push block by the instantaneous ejection force of the second ejection block, and the buttons around the product are forcibly ejected and loosened, and then injected Workers can take out the product with a light break. Compared with the prior art, the mold suitable for producing inner undercut products provided by the present invention uses two ejection actions, the first ejection action first ejects the large push block together with the product from the mold core; the second ejection action The ejection action ejects the product to a certain inclination angle through the instantaneous ejection force of the second ejection block, and the product is separated from the large push block. At this time, the product can be easily taken out without damaging the product, which can ensure that the product is buckled and released from the mold And the convenience of injection molding and pick-up, and can ensure the beautiful appearance and working performance of the product.

Description of drawings

Fig. 1 is a schematic diagram of the side structure suitable for producing an inner undercut product in an embodiment of the present invention;

Fig. 2 is a schematic view of the front structure suitable for producing inner undercut products in an embodiment of the present invention;

Fig. 3 is a structural schematic diagram of the first group of ejector plates, the second group of ejector plates and the ejector columns in the embodiment of the present invention applicable to the production of inner undercut products;

Fig. 4 is a schematic side view of working step 1 suitable for producing inner undercut products in an embodiment of the present invention;

Fig. 5 is a schematic front view of working step 1 suitable for producing inner undercut products in an embodiment of the present invention;

Fig. 6 is a schematic side view of working step 2 suitable for producing inner undercut products in an embodiment of the present invention;

Fig. 7 is a schematic front view of working step 2 suitable for producing inner undercut products in an embodiment of the present invention;

Fig. 8 is a schematic side view of working step 3 suitable for producing inner undercut products in an embodiment of the present invention;

Fig. 9 is a schematic front view of working step 3 suitable for producing inner undercut products in an embodiment of the present invention.

Detailed ways

In order for those skilled in the art to better understand the technical solutions provided by the present invention, the following will be described in conjunction with specific embodiments.

Please refer to Fig. 1-Fig. 3, Fig. 1 is a schematic diagram of the side structure suitable for producing inner undercut products in the embodiment of the present invention; Fig. 2 is a schematic diagram of the front structure suitable for producing inner undercut products in the embodiment of the present invention; Fig. 3 It is a structural schematic diagram of the first set of ejector plates, the second set of ejector plates and the ejector posts in the embodiment of the present invention applicable to the production of inner undercut products.

The mold suitable for producing inner undercut products provided by the embodiment of the present invention includes a male template 7 and a female template 4, wherein: the male template 7 is provided with a guide post 16, and the female template 4 is provided with a The guide sleeve hole 13, the upper part of the male template 7 is also provided with a rear mold core 15, the lower part of the female template 4 is also provided with a front mold core 14, the rear mold core 15 is provided with a large push block 23, the front mold core 14, the rear mold core 15 and the big push block 23 cooperate and press to form the inner undercut product 6; the upper side of the mother template 4 is connected with the hot runner plate 3, and the upper side of the hot runner plate 3 is connected with the upper fixing plate 2, and the upper fixing plate 2 is provided with a positioning ring 11 for positioning The bottom of the ring 11 is provided with a hot nozzle 12 extending into the hot runner plate 3; the lower side of the male template 7 is connected with the square iron 8, the lower side of the square iron 8 is connected with the lower fixing plate 9, the male template 7, the square iron 8 and the lower fixing plate 9 together form a cavity 28; the cavity 28 is provided with the first group of ejector plates S1 composed of the No. 1 ejector plate 21 and the No. The second set of thimble plates S2, No. 1 thimble plate 21 and No. 2 thimble plate 20 are connected by bolts, No. 3 thimble plate 19 and No. 4 thimble plate 18 are connected by bolts, and No. The plates 19 are connected by an interference fit of rubber plugs 27; the ejector posts 22 pass through the first set of thimble plates S1 to directly withstand the No. The two sets of thimble plates S2 and the male template 7 withstand the large push block 23, and the inner wall of the square iron 8 is provided with a clamping platform, and the first set of thimble plates S1 is displaced upward by a certain distance and is limited by the clamping platform; The push block 25 is connected to the No. 4 ejector plate 18 through the push block link 26, and the second ejection push block 25 is driven upward by the No. 4 ejector plate 18. When the second ejection push block 25 moves upward, it ejects the inner side of the molding Inverted products6. The No. 4 ejector plate 18 is provided with a limiting block 17 , and when the second group of ejector plates S2 moves upward for a certain distance, the limiting block 17 withstands the bottom of the male template 7 .

The surface of the upper fixing plate 2 is covered with the upper heat insulating plate 1, which has a better thermal insulation effect. The surface of the lower fixing plate 9 is covered with a lower heat insulating plate 10, which has a better thermal insulation effect.

The male template 7 and the female template 4 are provided with positioning side locks 5 that cooperate with each other, so that the male template 7 and the female template 4 are pressed together more tightly, ensuring the molding quality of the product.

The working principle of the mold suitable for producing inner undercut products provided by the present invention includes three working steps:

Work step one:

Please refer to Fig. 4 and Fig. 5, Fig. 4 is a schematic side view of working step 1 suitable for producing inner undercut products in the embodiment of the present invention; Fig. 5 is a working step 1 suitable for producing inner undercut products in the embodiment of the present invention front view diagram.

After the product 6 is injection molded, the mold is opened from the parting surface, the guide sleeve hole 13 on the female template 4 is separated from the guide post 16 on the male template 7, and the female template 4 and the front mold core 14 are connected to the male template 7 and the rear mold. Kernel 15, large push block 23 and product 6 are separated.

Working step two:

Please refer to Fig. 6 and Fig. 7, Fig. 6 is a schematic side view of the second working step suitable for producing inner undercut products in the embodiment of the present invention; Fig. 7 is a second working step suitable for producing inner undercut products in the embodiment of the present invention front view diagram.

Then the first set of thimble plates S1 and the second set of thimble plates S2 are ejected together by the ejector column 22. After a certain distance is ejected, that is, when the No. 2 thimble plate 20 of the first set of thimble plates S1 is pushed out by the square iron 8 After the limiting table body is limited, the ejector plate S1 of the first group stops ejecting, and the first ejection is completed. At this time, the large push block 23 and the second ejection push block 25 are also under the action of the push block linkage 26 As the first set of thimble plates S1 and the second set of thimble plates S2 move upward, the large push block 23 and the product 6 leave the rear mold core 15. When the first set of thimble plates S1 stop ejecting, the large push block 23 and the product 6 Correspondingly stop the ejection;

Working steps three:

Please refer to Fig. 8 and Fig. 9, Fig. 8 is a schematic side view of the third working step suitable for producing inner undercut products in the embodiment of the present invention; Fig. 9 is a third working step suitable for producing inner undercut products in the embodiment of the present invention front view diagram.

The ejector column 22 continues to drive the second group of thimble plates S2 to move upwards, and then continues to drive the push block linkage 26 and the secondary ejection push block 25 to eject the product 6, and the product 6 is pushed out by the instantaneous ejection force of the secondary ejection push block 25. Push it to a certain angle of inclination and separate it from the big push block 23, and forcefully push out and loosen the buttons around the product 6, and then the injection molding worker can take out the product 6 with a light snap.

Compared with the prior art, the mold suitable for producing inner undercut products provided by the present invention uses two ejection actions, the first ejection action first ejects the large push block together with the product from the mold core; the second ejection action The ejection action ejects the product to a certain inclination angle through the instantaneous ejection force of the second ejection block, and the product is separated from the large push block. At this time, the product can be easily taken out without damaging the product, which can ensure that the product is buckled and released from the mold And the convenience of injection molding and pick-up, and can ensure the beautiful appearance and working performance of the product.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (4)

1. A mold suitable for producing inner undercut products, characterized in that: it includes a male template and a female template, wherein: The male formwork is provided with a guide post, the female formwork is provided with a guide sleeve hole socketed on the guide post, the upper part of the male formwork is also provided with a rear mold core, and the lower part of the female formwork is also provided with a The front mold core, the rear mold core is provided with a large push block, and the front mold core, the rear mold core and the large push block are cooperatively pressed to form an inner undercut product; The upper side of the master template is connected to the hot runner plate, and the upper side of the hot runner plate is connected to the upper fixing plate. The upper fixing plate is provided with a positioning ring, and the lower side of the positioning ring is provided with a ring extending into the hot runner plate. Hot mouth; The lower side of the male formwork is connected with the square iron, the lower side of the square iron is connected with the lower fixing plate, and the male formwork, the square iron and the lower fixing plate jointly form a cavity; There is a first group of ejector plates consisting of a No. 1 ejector plate and a No. 2 ejector plate and a second group of ejector plates composed of a No. 3 ejector plate and a No. 4 ejector plate, the No. 1 ejector plate and the No. 2 ejector plate The No. 3 thimble plate and the No. 4 thimble plate are connected by bolts, and the No. 2 thimble plate and the No. 3 thimble plate are connected by a rubber plug interference fit; The ejector column passes through the first group of ejector plates and directly bears against the No. 3 ejector plate, and the large push block link connected to the No. 2 ejector plate passes through the second group of ejector plates and the male template ejector. Hold the big push block, the inner wall of the square iron is provided with a clamping platform, and the first group of thimble plates are displaced upward by a certain distance and then limited by the clamping platform; The connecting rod is connected with the No. 4 ejector plate, and the secondary ejection push block is driven upward by the No. 4 ejector plate. When the secondary ejection push block moves upward, the formed inner undercut product is ejected. . 2. The mold suitable for producing inner undercut products according to claim 1, characterized in that, the surface of the upper fixing plate is covered with an upper heat insulation plate, and the surface of the lower fixing plate is covered with a lower heat insulation plate . 3. The mold suitable for producing inner undercut products according to claim 1, wherein a limit block is set on the No. 4 ejector plate, and when the second group of ejector plates moves upward for a certain distance, the The limiting block bears against the bottom of the male template. 4. The mold suitable for producing undercut products according to claim 1, characterized in that, the male template and the female template are provided with positioning side locks that cooperate with each other.

Images