Anti-deformation structure for insert in injection mold

Abstract

The utility model belongs to the technical field of injection molds, and discloses an anti-deformation structure for an insert in an injection mold, which comprises a base mechanism, the base mechanism comprises a lower mold seat, the top of the lower mold seat is provided with two sliding chutes, the interiors of the two sliding chutes are both connected with sliding blocks in a sliding manner, and the sliding blocks are connected with the lower mold seat in a sliding manner. Clamping blocks are fixedly connected to the sides, close to each other, of the two sliding blocks, the sides, close to each other, of the two sliding blocks are elastically connected with the inner walls of the sliding grooves through first springs, a lower mold cavity is formed in the top of the lower mold base, and two inclined blocks are slidably connected to the interior of the lower mold cavity; according to the anti-deformation structure for the insert in the injection mold, through clamping connection between the clamping blocks and the clamping grooves, the insert main body is fixed in the lower mold cavity, the insert main body is prevented from moving in the injection molding and upper mold base lifting process, the deformation of the insert main body is avoided, and the deformation of the insert main body is avoided. And therefore, the insert main body is abraded and even deformed.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds, and specifically relates to an anti-deformation structure for inserts in an injection mold. Background Art

[0002] With the development of modern industrial products, the demand for the appearance decoration of industrial products is getting higher and higher. In-mold decoration injection molding technology combines technologies and methods such as thin-film printing, pre-forming, and injection molding to manufacture molds for plastic products with inserts. Inserts are important components in injection molds and are usually used to form complex internal or external features.

[0003] Currently, most of the insert structures in injection molds on the market only fix the inserts through positioning pins, making the inserts prone to move during the injection process and the lifting of the upper mold base, resulting in wear and deformation of the inserts. At the same time, the inserts are also prone to deformation due to thermal expansion and contraction during the injection process. Therefore, we propose an anti-deformation structure for inserts in an injection mold. Summary of the Utility Model

[0004] To solve the problem proposed in the above background art that only fixing the inserts through positioning pins makes the inserts prone to move during the injection process and the lifting of the upper mold base, resulting in wear and deformation of the inserts, and at the same time, the inserts are also prone to deformation due to thermal expansion and contraction during the injection process, the utility model provides an anti-deformation structure for inserts in an injection mold.

[0005] To achieve the above object, the utility model provides the following technical solutions: including a base mechanism, an insert mechanism is arranged above the base mechanism, and an injection mechanism is arranged above the insert mechanism. The base mechanism includes a lower mold base. Two chutes are opened at the top of the lower mold base. Sliders are slidably connected inside both of the two chutes. Blocks are fixedly connected to one side of both of the two sliders close to each other. One side of both of the two sliders close to each other is elastically connected to the inner wall of the chute through a first spring. A lower mold cavity is arranged at the top of the lower mold base. Two inclined blocks are slidably connected inside the lower mold cavity. One side of both of the two inclined blocks away from each other is elastically connected to the inner wall of the lower mold cavity through a second spring. Four positioning pins are fixedly connected to the inner wall of the lower mold cavity.

[0006] Preferably, the top of the slider penetrates through the inner wall of the chute and extends above the lower mold base. The top of the slider is provided with an inclined surface. The lower mold cavity is located between the two chutes. The four positioning pins are evenly distributed inside the positioning pins.

[0007] Preferably, the insert mechanism includes an insert main body. Card slots are respectively opened on both sides of the insert main body. Four positioning holes are evenly opened at the bottom of the insert main body. Two heat conducting plates are fixedly connected to the bottom of the insert main body.

[0008] Preferably, the two heat conducting plates are respectively located above the two inclined blocks. The size of the insert body is adapted to the size of the lower die cavity. The size of the positioning hole is adapted to the size of the positioning pin. The size of the clamping groove is adapted to the size of the clamping block.

[0009] Preferably, the injection molding mechanism includes an upper die base. An upper die cavity is provided at the bottom of the upper die base. Injection holes are formed in the inner wall of the upper die cavity. A plurality of air outlet holes are uniformly formed in the inner wall of the upper die cavity. Grooves are respectively formed on both sides of the upper die cavity. Two driving blocks are fixedly connected to the bottom of the upper die base.

[0010] Preferably, the injection holes penetrate through the inner wall of the upper die cavity and extend above the upper die base. The plurality of air outlet holes penetrate through the inner wall of the upper die base and extend above the upper die base. The upper die cavity is located between the two driving blocks.

[0011] Preferably, the upper die cavity is located above the insert body. The size of the upper die cavity is adapted to the size of the lower die cavity. The groove is located above the clamping block. The size of the groove is adapted to the size of the clamping block. The two driving blocks are respectively located above the two sliders.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] In the present utility model, the insert body is fixed inside the lower die cavity by the clamping connection between the clamping block and the clamping groove, avoiding the movement of the insert body during the injection molding and the lifting of the upper die base, thus preventing the wear and even deformation of the insert body. At the same time, heat conducting plates are provided at the bottom of the insert body, which can quickly cool the insert body during the injection molding process, avoiding the expansion and deformation of the insert body due to high temperature. The inclined blocks and the second springs are provided on the side of the heat conducting plates, which can absorb the stress generated by thermal expansion and can also compensate for the gaps caused by material shrinkage or other reasons after the heat conducting plates are cooled, improving the anti-deformation performance of the insert. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present utility model;

[0015] Figure 2 is a schematic bottom view structural diagram of the injection molding mechanism of the present utility model;

[0016] Figure 3 is a schematic sectional structural diagram of the base mechanism of the present utility model;

[0017] Figure 4 is a schematic sectional structural diagram of the insert mechanism of the present utility model;

[0018] Figure 5This is a schematic top view of the base mechanism of the present utility model;

[0019] Figure 6 This is a schematic bottom view of the insert mechanism of the present utility model;

[0020] Figure 7 This is a schematic bottom view of the injection molding mechanism of the present utility model.

[0021] In the figure: 1. Base mechanism; 101. Lower mold base; 102. Slide groove; 103. Slide block; 104. Clamping block; 105. First spring; 106. Lower mold cavity; 107. Inclined block; 108. Second spring; 109. Positioning pin; 2. Insert mechanism; 201. Insert main body; 202. Card slot; 203. Positioning hole; 204. Heat conduction plate; 3. Injection molding mechanism; 301. Upper mold base; 302. Upper mold cavity; 303. Injection hole; 304. Air outlet hole; 305. Groove; 306. Driving block. Detailed implementation manner

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] As Figures 1 to 5 shown, the present utility model provides an anti-deformation structure for inserts in an injection mold, including a base mechanism 1. An insert mechanism 2 is arranged above the base mechanism 1, and an injection molding mechanism 3 is arranged above the insert mechanism 2. The base mechanism 1 includes a lower mold base 101. Two slide grooves 102 are opened at the top of the lower mold base 101. Slide blocks 103 are slidably connected inside both of the two slide grooves 102. Clamping blocks 104 are fixedly connected to the sides of the two slide blocks 103 close to each other. The sides of the two slide blocks 103 close to each other are elastically connected to the inner walls of the slide grooves 102 through first springs 105. A lower mold cavity 106 is arranged at the top of the lower mold base 101. Two inclined blocks 107 are slidably connected inside the lower mold cavity 106. The sides of the two inclined blocks 107 away from each other are elastically connected to the inner walls of the lower mold cavity 106 through second springs 108. Four positioning pins 109 are fixedly connected to the inner wall of the lower mold cavity 106.

[0024] The top of the slide block 103 penetrates through the inner wall of the slide groove 102 and extends above the lower mold base 101. The top of the slide block 103 is provided with an inclined surface. The lower mold cavity 106 is located between the two slide grooves 102. The four positioning pins 109 are evenly distributed inside the positioning pins 109.

[0025] Adopting the above solution: By the clamping connection between the clamping block 104 and the clamping groove 202, the insert main body 201 is fixed inside the lower die cavity 106, preventing the insert main body 201 from moving during the injection molding process and the lifting of the upper die base 301, thus avoiding the situation of wear or even deformation of the insert main body 201, achieving the effect of preventing the insert from deforming.

[0026] As Figures 2 to 7 shown, the insert mechanism 2 includes an insert main body 201. Clamping grooves 202 are respectively formed on both sides of the insert main body 201. Four positioning holes 203 are evenly formed at the bottom of the insert main body 201. Two heat conducting plates 204 are fixedly connected to the bottom of the insert main body 201. The two heat conducting plates 204 are respectively located above the two inclined blocks 107. The size of the insert main body 201 is adapted to the size of the lower die cavity 106. The size of the positioning holes 203 is adapted to the size of the positioning pins 109. The size of the clamping grooves 202 is adapted to the size of the clamping blocks 104.

[0027] The injection molding mechanism 3 includes an upper die base 301. An upper die cavity 302 is arranged at the bottom of the upper die base 301. Injection holes 303 are formed on the inner wall of the upper die cavity 302. A plurality of air outlet holes 304 are evenly formed on the inner wall of the upper die cavity 302. Grooves 305 are respectively formed on both sides of the upper die cavity 302. Two driving blocks 306 are fixedly connected to the bottom of the upper die base 301. The injection holes 303 penetrate through the inner wall of the upper die cavity 302 and extend above the upper die base 301. The plurality of air outlet holes 304 penetrate through the inner wall of the upper die base 301 and extend above the upper die base 301. The upper die cavity 302 is located between the two driving blocks 306.

[0028] The upper die cavity 302 is located above the insert main body 201. The size of the upper die cavity 302 is adapted to the size of the lower die cavity 106. The grooves 305 are located above the clamping blocks 104. The size of the grooves 305 is adapted to the size of the clamping blocks 104. The two driving blocks 306 are respectively located above the two sliders 103.

[0029] Adopting the above solution: By arranging the heat conducting plates 204 at the bottom of the insert main body 201, the insert main body 201 can be quickly cooled during the injection molding process, avoiding the insert main body 201 from expanding and deforming due to high temperature. By arranging the inclined blocks 107 and the second springs 108 on the side of the heat conducting plates 204, the stress generated by thermal expansion can be absorbed, and the gap caused by material shrinkage or other reasons can be compensated after the heat conducting plates 204 are cooled. At the same time, the air outlet holes 304 are arranged to facilitate the demolding of the injection molded workpiece, avoiding the workpiece from moving when the upper die base 301 moves upward, causing pulling on the insert main body 201 and resulting in deformation.

[0030] Working principle and usage process of the present utility model: First, the staff needs to align the positioning hole 203 at the bottom of the insert main body 201 with the positioning pin 109 inside the lower die cavity 106, and make the heat conducting plate 204 located above the inclined block 107. Then, move the insert main body 201 downward, so that the bottom of the heat conducting plate 204 presses the inclined surface of the inclined block 107. Through the inclined surface, the inclined block 107 slides away from the insert main body 201, thereby moving the insert main body 201 into the lower die cavity 106, and making the positioning pin 109 and the positioning hole 203 engage with each other. At this time, the second spring 108 is in a compressed state. Then, through external driving, the upper die base 301 moves downward. During the downward movement of the upper die base 301, the driving block 306 will press the inclined surface of the slider 103. Through the inclined surface, the two sliders 103 respectively move in the chute 102 towards the insert main body 201, making the clamping block 104 and the clamping groove 202 engage with each other, and pressing the first spring 105, fixing the insert main body 201 inside the lower die cavity 106. At this time, the lower die cavity 106 and the upper die cavity 302 are closed to form a cavity, and the groove 305 and the clamping block 104 engage with each other. Subsequently, the molding material is injected into the cavity through the injection hole 303, and the injection work can be carried out. After the injection is completed, only need to inject air into the air outlet hole 304, and through the air, the workpiece is demolded from the upper die cavity 302. Then, make the upper die base 301 move upward, so that the slider 103 drives the clamping block 104 to slowly move out of the clamping groove 202 through the elastic force of the first spring 105. Finally, take out the workpiece.

[0031] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0032] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An anti-deformation structure for an insert in an injection mold, comprising a base mechanism (1), characterized in that: An insert mechanism (2) is arranged above the base mechanism (1), and an injection molding mechanism (3) is arranged above the insert mechanism (2). The base mechanism (1) comprises a lower mold base (101), and two slide grooves (102) are arranged on the top of the lower mold base (101). Slide blocks (103) are slidably connected inside the two slide grooves (102), and a clamping block (104) is fixedly connected to the sides of the two slide blocks (103) that are close to each other. The two slide blocks (103) are mutually connected. The sides approaching each other are elastically connected to the inner wall of the slide groove (102) through a first spring (105); a lower mold cavity (106) is arranged on the top of the lower mold base (101); two inclined blocks (107) are slidably connected inside the lower mold cavity (106); the sides of the two inclined blocks (107) away from each other are elastically connected to the inner wall of the lower mold cavity (106) through a second spring (108); and four positioning pins (109) are fixedly connected to the inner wall of the lower mold cavity (106).

2. The anti-deformation structure for inserts in injection molds according to claim 1, characterized in that: The top of the slider (103) passes through the inner wall of the slide groove (102) and extends to the top of the lower mold base (101). The top of the slider (103) is provided with an inclined surface. The lower mold cavity (106) is located between the two slide grooves (102). The four positioning pins (109) are evenly distributed inside the positioning pins (109).

3. The anti-deformation structure for inserts in injection molds according to claim 1, characterized in that: The insert mechanism (2) comprises an insert body (201), two sides of the insert body (201) are respectively provided with slots (202), the bottom of the insert body (201) is evenly provided with four positioning holes (203), and the bottom of the insert body (201) is fixedly connected with two heat conducting plates (204).

4. The anti-deformation structure for inserts in an injection mold according to claim 3, characterized in that: The two heat conducting plates (204) are respectively located above the two inclined blocks (107); the size of the insert body (201) is matched with the size of the lower mold cavity (106); the size of the positioning hole (203) is matched with the size of the positioning pin (109); and the size of the card slot (202) is matched with the size of the card block (104).

5. The anti-deformation structure for inserts in an injection mold according to claim 3, characterized in that: The injection molding mechanism (3) comprises an upper mold base (301), an upper mold cavity (302) is arranged at the bottom of the upper mold base (301), an injection hole (303) is opened on the inner wall of the upper mold cavity (302), a plurality of air outlet holes (304) are evenly opened on the inner wall of the upper mold cavity (302), grooves (305) are respectively opened on both sides of the upper mold cavity (302), and two driving blocks (306) are fixedly connected to the bottom of the upper mold base (301).

6. The anti-deformation structure for inserts in an injection mold according to claim 5, characterized in that: The injection hole (303) penetrates the inner wall of the upper mold cavity (302) and extends to the top of the upper mold base (301), and a plurality of the air outlet holes (304) penetrate the inner wall of the upper mold base (301) and extend to the top of the upper mold base (301), and the upper mold cavity (302) is located between the two driving blocks (306).

7. The anti-deformation structure for inserts in an injection mold according to claim 6, characterized in that: The upper mold cavity (302) is located above the insert body (201), and the size of the upper mold cavity (302) is adapted to the size of the lower mold cavity (106). The groove (305) is located above the block (104), and the size of the groove (305) is adapted to the size of the block (104). The two driving blocks (306) are respectively located above the two sliders (103).

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