Plastic mold mechanism with cooling and exhausting functions

Abstract

The utility model discloses a plastic mould mechanism with cooling and exhausting functions, which comprises an upper mould, a lower mould, a support frame, four inclined top blocks, four inclined top grooves, a top block and a top rod, the four inclined top blocks are respectively matched in the four inclined top grooves, a plurality of crossed grooves which are arranged in a crossed manner are arranged on the side surfaces of the inclined top blocks, and the top rod is arranged in the crossed grooves. All the crossed grooves form a crossed combined groove, and the crossed combined groove is used for reducing the contact area of the inclined ejection block and the inclined ejection groove and forming an exhaust channel. According to the utility model, the contact area of the inclined ejector block and the inclined ejector groove is reduced, the heat generation is reduced, the inclined ejector block is not easy to deform, and the exhaust channel is arranged, so that air generated in the inclined ejector groove can be effectively exhausted, and the demolding effect is ensured.

Description

Technical Field

[0001] The utility model belongs to the field of injection molding, relates to plastic molds, and specifically relates to a plastic mold mechanism with heat dissipation and exhaust functions. Background Art

[0002] A plastic mold is a mold used for injection molding of products. It forms a mold cavity by pressing an upper mold and a lower mold together, and then injects plastic into the mold cavity to form a product with a specified structure. After injection molding, demolding is required. The existing method mainly realizes inclined ejection demolding through an inclined ejector block. In actual applications, because the inclined ejector block moves and rubs in the inclined ejector slot, the generated heat will cause the inclined ejector block to deform. Once the deformation degree is relatively large, the inclined ejector block will be stuck, resulting in the suspension of the demolding work and the need for shutdown for maintenance, seriously affecting production efficiency.

[0003] In addition, the reciprocating movement of the inclined ejector block along the inclined ejector slot will generate air in the inclined ejector slot, which will cause air resistance to the inclined ejector block and affect the smooth movement of the inclined ejector block, thus affecting the demolding effect. Summary of the Invention

[0004] Object of the Invention: To solve the problems that the inclined ejector block is prone to deformation and the movement of the inclined ejector block is affected by air resistance in the prior art, a plastic mold mechanism with heat dissipation and exhaust functions is provided, which not only reduces the contact area between the inclined ejector block and the inclined ejector slot, reduces heat generation, and makes the inclined ejector block not easily deformed, but also has an exhaust channel, can effectively discharge the air generated in the inclined ejector slot, and ensures the demolding effect.

[0005] Technical Solution: To achieve the above object, the utility model provides a plastic mold mechanism with heat dissipation and exhaust functions, including an upper mold, a lower mold, a support frame, four inclined ejector blocks, four inclined ejector slots, a top block, and a top rod. The four inclined ejector blocks are respectively fitted in the four inclined ejector slots. A plurality of cross grooves arranged in a cross pattern are formed on the side surface of the inclined ejector block, and all the cross grooves form a cross combination groove. The cross combination groove is used to reduce the contact area between the inclined ejector block and the inclined ejector slot and form an exhaust channel.

[0006] Further, the length of the cross groove is 1 - 2 mm, and the depth is 0.05 - 0.1 mm.

[0007] Further, a bolt hole is provided at the bottom end of the inclined ejector block, and the inclined ejector block is fixedly connected to the top block through a bolt.

[0008] Further, a return spring is provided between the top block and the lower mold.

[0009] Further, a mutually matching positioning groove and positioning post are respectively provided on the upper mold and the lower mold.

[0010] Beneficial effects: Compared with the prior art, the utility model has the following advantages:

[0011] 1. By arranging the cross-combined groove on the side surface of the lifter block, without affecting the normal movement of the lifter block, the contact area between the lifter block and the lifter groove is reduced, the generation of frictional heat is lowered, making the lifter block not easily deformed, ensuring the continuous use effect of the lifter block, and guaranteeing the production efficiency.

[0012] 2. The cross structure of the cross-combined groove forms an exhaust channel in the lifter groove, which can timely and effectively discharge the air generated in the lifter groove, ensuring the demolding effect. Description of the drawings

[0013] Figure 1 It is a top view of the lower mold in the utility model;

[0014] Figure 2 It is a structural schematic diagram of the utility model in the mold-closing state;

[0015] Figure 3 It is a structural schematic diagram of the utility model in the state after demolding;

[0016] Figure 4 It is a structural schematic diagram of the lifter block. Specific embodiments

[0017] The following further clarifies the utility model in conjunction with the drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the utility model and not to limit the scope of the utility model. After reading the utility model, various equivalent forms of modification by those skilled in the art fall within the scope defined by the appended claims of this application.

[0018] As Figures 1 to 4 shown, the utility model provides a plastic mold mechanism with heat reduction and exhaust functions, including an upper mold 1, a lower mold 2, a support frame 11, four lifter blocks 3, four lifter grooves 4, a top block 8, a top rod 6. The four lifter blocks 3 are respectively fitted in the four lifter grooves 4. A plurality of cross grooves 31 arranged crosswise are formed on the side surface of the lifter block 3. All the cross grooves 31 form a cross-combined groove 5. The length of the cross groove 31 is 2 mm, and the depth is 0.1 mm. A bolt hole 32 is arranged at the bottom end of the lifter block 3. The lifter block 3 is fixedly connected to the top block 8 by a bolt through the bolt hole 32. A return spring 7 is arranged between the top block 8 and the lower mold 2. Matching positioning grooves 9 and positioning posts 10 are respectively arranged on the upper mold 1 and the lower mold 2. The top rod 6 is located below the top block 8. The lower mold 2 is provided with two mold cores 21. The four lifter grooves 4 are respectively distributed in pairs on the sides of the two mold cores 21.

[0019] In this embodiment, the above plastic mold mechanism is used for the injection molding of product 100. Refer to Figures 1 to 3 , and the specific process is as follows: First, the upper mold 1 is pressed down on the lower mold 2 to achieve mold closing. At this time, the mold core 21 forms a mold cavity, and the product 100 is formed by injecting plastic into the mold cavity through the injection port. Then, the upper mold 1 is lifted, and then the ejector block 8 is pushed upward by the ejector rod 6, so as to drive the angled ejector block 3 to move upward along the angled ejector slot 4 until the product 100 in the mold core 21 is ejected, realizing demolding. After demolding, under the action of the return spring 7, the ejector block 8 and the angled ejector block 3 are reset, and the staff takes out the product 100 through the fixture.

[0020] During the above process, when the angled ejector block 3 is moving, due to the existence of the cross-combination slot 5, on the basis of ensuring the demolding effect, the contact area between the angled ejector block 3 and the angled ejector slot 4 is reduced, so the heat generated by the movement is also significantly reduced. In this way, the angled ejector block 3 is not easily deformed due to heat. Moreover, due to the ingenious structure of the cross-combination slot 5, the contacting cross-slots 31 are connected to each other, so that the cross-combination slot 5 forms an exhaust channel. The air generated during the movement of the angled ejector block 3 can be discharged in time through this exhaust channel, avoiding the excessive influence of air resistance on the angled ejector block 3 and ensuring a good and stable demolding effect.

Claims

1. A plastic mold mechanism with heat reduction and exhaust functions, comprising an upper mold, a lower mold, a support frame, four inclined ejector blocks, four inclined ejector grooves, an ejector block, and an ejector rod, wherein the four inclined ejector blocks are respectively matched in the four inclined ejector grooves, and characterized in that: A plurality of cross grooves arranged crosswise are provided on the side surface of the inclined top block, and all the cross grooves form a cross combination groove, which is used to reduce the contact area between the inclined top block and the inclined top groove and form an exhaust channel.

2. A plastic mold mechanism with heat reduction and exhaust functions according to claim 1, characterized in that: The length of the cross groove is 1-2 mm, and the depth is 0.05-0.1 mm.

3. The plastic mold mechanism with heat reduction and exhaust functions according to claim 1, characterized in that: The bottom end of the inclined top block is provided with a bolt hole, and the inclined top block is fixed on the top block by bolt connection.

4. The plastic mold mechanism with heat reduction and exhaust functions according to claim 1, characterized in that: A return spring is arranged between the top block and the lower mold.

5. The plastic mold mechanism with heat reduction and exhaust functions according to claim 1, characterized in that: The upper mold and the lower mold are respectively provided with positioning grooves and positioning columns which match each other.

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