A tear-free injection mold

Abstract

This utility model relates to a tear-free injection mold, belonging to the field of injection mold technology. It includes: a slider, a slanted guide post, a spring block, a limiting bolt, and a spring. The slider has a slanted guide hole and a countersunk hole. The top of the slanted guide post is fixed to the bottom surface of the upper mold plate and slides within the slanted guide hole. The side end of the spring block has a limiting groove. The screw end of the limiting bolt slides through the countersunk hole and is inserted into the limiting groove. The spring is sleeved outside the limiting bolt and passes through the limiting groove. In this utility model, a connecting block is fixed to the middle side end of the slider corresponding to the groove, and a spring block slides within a groove B at the top of the connecting block. Because a spring is placed in the limiting groove of the spring block, with one end of the spring contacting the bottom of the limiting groove and the other end contacting the slider, the spring block can be elastically pushed to contact the injection molded product after the slider slides away from the groove, preventing tearing of the injection molded product. Then, after the slider slides a predetermined distance away from the groove, the limiting bolt pulls the spring block to slide synchronously with the slider, facilitating demolding.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to a tear-free injection mold. Background Technology

[0002] Injection molds are tools used to produce plastic products, giving them a complete structure and precise dimensions. Injection molding is a processing method used for the mass production of certain complex-shaped parts. Specifically, it involves injecting molten plastic into a mold cavity under high pressure using an injection molding machine, where it is then cooled and solidified to obtain the molded product.

[0003] Currently, traditional injection molds mainly consist of an upper mold plate, a lower mold plate, a slider, and inclined guide pillars. The lower mold plate is located below the upper mold plate, and its top surface has a groove and a slide. The slide is arranged from the direction away from the groove to the direction closer to the groove. The slider slides on the slide and has inclined guide holes. The top of the inclined guide pillar is fixed to the upper mold plate and slides in the inclined hole. When the upper mold plate moves upward (mold opening), it pushes the slider away from the injection molded product, facilitating demolding. However, during injection molding, the injection molded product is very prone to sticking to the slider. Directly moving the upper mold plate upward to move the slider away from the injection molded product can easily lead to tearing of the injection molded product, reducing the yield rate.

[0004] Therefore, how to design a tear-free injection mold that is simple in structure, easy to operate, and not easily torn is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] This invention provides a tear-free injection mold, solving the technical problem of easy tearing of injection molded products when opening existing injection molds.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a tear-free injection mold, comprising: an upper mold plate, a lower mold plate, a slider, an inclined guide post, a spring block, a limiting bolt, and a spring.

[0007] The lower template is located below the upper template and its top surface is provided with a groove and a sliding groove A. The sliding groove A passes through the groove and is arranged from away from the groove to close to the groove. The slider slides in the sliding groove A and is provided with an oblique guide hole. A connecting block is fixed to the middle end of the slider corresponding to the groove, and the top surface of the connecting block is provided with a sliding groove B arranged along the sliding direction of the slider. A countersunk hole is provided above the connecting block and arranged along the sliding direction of the slider. The top end of the oblique guide post is fixed to the bottom surface of the upper template and slides in the oblique guide hole to push as the upper template moves upward. The slider slides away from the groove; the spring slides within the groove B and has a limiting groove corresponding to the side end of the slider and opposite to the countersunk hole; the screw end of the limiting bolt slides through the countersunk hole and is inserted into the limiting groove; the spring is sleeved outside the limiting bolt and passes through the limiting groove, with one end contacting the slider and the other end contacting the bottom of the limiting groove hole, so that after the slider slides away from the groove, it elastically pushes the slider and the spring apart, and then after the slider slides a predetermined distance away from the groove, it pulls the spring to slide synchronously.

[0008] The beneficial effects of this utility model are: improving the structure of traditional injection molds, fixing a connecting block at the middle side of the slider corresponding to the groove, and sliding a spring block in the groove B at the top of the connecting block. Since a spring is placed in the limiting groove of the spring block, one end of the spring contacts the bottom of the limiting groove and the other end contacts the slider. After the slider slides away from the groove, it can elastically push the spring block to contact the injection molded product to prevent the injection molded product from tearing. After the slider slides away from the groove for a predetermined distance (at this time the injection molded product is in contact with the cold external environment), the limiting bolt is used to pull the spring block to slide synchronously with the slider, which facilitates the injection molded product to leave the cavity.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the countersunk hole, the limiting groove, the limiting bolt, and the spring are all arranged in pairs opposite to each other.

[0011] The further beneficial effects of adopting the above are: firstly, by using two springs, the elastic thrust that pushes the spring block into contact with the injection-molded finished product can be enhanced; secondly, by using two bolts, the pulling force that allows the spring block and the slider to slide synchronously can be enhanced.

[0012] Furthermore, both the countersunk hole and the limiting groove are arranged in a downwardly inclined manner from the direction away from the groove to the direction closer to the groove. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the assembly of a slider, inclined guide post, connecting block, spring block and limiting bolt in a tear-free injection mold according to the present invention.

[0014] Figure 2 This is a structural diagram showing the disassembled components of a tear-free injection mold, including a slider, inclined guide post, connecting block, spring block, and limiting bolt.

[0015] The attached diagram lists the components represented by each number as follows:

[0016] 1. Slider, 11. Angled guide hole, 12. Countersunk hole, 2. Angled guide post, 3. Spring block, 4. Limiting bolt, 41. Limiting groove, 5. Spring. Detailed Implementation

[0017] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0018] like Figure 1 and Figure 2 As shown, a tear-free injection mold includes: an upper mold plate, a lower mold plate, a slider 1, an inclined guide post 2, a spring block 3, a limit bolt 4, and a spring 5.

[0019] The lower template is located below the upper template and its top surface is provided with a groove and a sliding groove A. The sliding groove A passes through the groove and is arranged from the direction away from the groove to the direction close to the groove. The slider 1 slides in the sliding groove A and is provided with an inclined guide hole 11. A connecting block 6 is fixed to the middle end of the slider 1 corresponding to the groove, and the top surface of the connecting block 6 is provided with a sliding groove B arranged along the sliding direction of the slider 1. The slider 1 is provided with a countersunk hole 12 arranged along the sliding direction of the slider 1 above the connecting block 6. The top end of the inclined guide post 2 is fixed to the bottom surface of the upper template and slides in the inclined guide hole 11 so as to push the slider 1 as the upper template moves upward. Slide away from the groove; the spring block 3 slides in the groove B and the side end of the corresponding slider 1 is provided with a limiting groove 41 opposite to the countersunk hole 12; the screw end of the limiting bolt 4 slides through the countersunk hole 12 and is inserted into the limiting groove 41; the spring 5 is sleeved on the limiting bolt 4 and passes through the limiting groove 41, one end of which contacts the slider 1 and the other end of which contacts the bottom of the limiting groove 41, so that after the slider 1 slides away from the groove, it elastically pushes the slider 1 and the spring block 3 apart, and after the slider 1 slides a predetermined distance away from the groove, it pulls the spring block 3 to slide synchronously.

[0020] In some specific embodiments, the countersunk hole 12, the limiting groove 41, the limiting bolt 4, and the spring 5 are all arranged in pairs opposite to each other.

[0021] In some specific embodiments, the countersunk hole 12 and the limiting groove 41 are arranged in a downwardly inclined manner from the direction away from the groove to the direction closer to the groove.

[0022] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A tear-free injection mold comprising: An upper die plate and a lower die plate, the lower die plate is below the upper die plate and the top surface of the lower die plate is provided with a mold groove and a sliding groove A, the sliding groove A is through the mold groove and is arranged from the direction away from the mold groove to the direction close to the mold groove; characterized in that, further comprising: A sliding block (1) is sliding in the sliding groove A and the sliding block (1) is provided with an inclined guide hole (11) on the top surface, the sliding block (1) is fixed with a connecting block (6) corresponding to the middle side end of the mold groove and the top surface of the connecting block (6) is provided with a sliding groove B arranged along the sliding direction of the sliding block (1), the sliding block (1) is provided with a countersunk hole (12) arranged along the sliding direction of the sliding block (1) corresponding to the upper side of the connecting block (6); An inclined guide column (2) is fixed on the bottom surface of the upper die plate and is sliding in the inclined guide hole (11) to push the sliding block (1) to slide in the direction away from the mold groove when the upper die plate moves upward; A spring block (3) is sliding in the sliding groove B and is provided with a limiting groove (41) corresponding to the side end of the sliding block (1) and opposite to the countersunk hole (12); A limiting bolt (4) is sliding through the countersunk hole (12) and is inserted into the limiting groove (41); A spring (5) is sleeved outside the limiting bolt (4) and is inserted into the limiting groove (41), one end of the spring (5) is in contact with the sliding block (1) and the other end of the spring (5) is in contact with the bottom of the limiting groove (41), so that the spring block (3) is pushed away after the sliding block (1) slides in the direction away from the mold groove, and then the spring block (3) is pulled to slide synchronously after the sliding block (1) slides in the direction away from the mold groove for a predetermined distance.

2. A tear-free injection mold according to claim 1, wherein The countersunk hole (12), the limiting groove (41), the limiting bolt (4) and the spring (5) are all arranged oppositely.

3. A tear-free injection mold according to claim 1, wherein The countersunk hole (12) and the limiting groove (41) are arranged downwardly and obliquely from the direction away from the mold groove to the direction close to the mold groove.

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