Core-pulling mold

Abstract

The utility model relates to the technical field of dies, in particular to a core-pulling die which comprises a lower die and a core-pulling mechanism, the lower die is provided with a lower cavity, the core-pulling mechanism comprises a fixing seat, a core and a sliding block, the fixing seat is connected to the lower die, the core is slidably connected to the fixing seat in the axial direction of the core, the core is used for being embedded into the lower cavity, and the sliding block is slidably connected to the fixing seat. The end, close to the lower cavity, of the sliding block is coaxially connected to one end of the mold core, an air outlet is formed in the outer wall of the mold core and used for blowing air to the inner wall of a product, the sliding block is provided with an air inlet communicated with the outside, the core pulling mechanism is provided with an air channel, and the air channel is communicated with the air inlet and the air outlet. Gas is introduced from the gas inlet, passes through the gas channel and then flows out from the gas outlet, so that after a product is slightly expanded, the inner wall of the product is separated from the surface of the cavity, the product is not bonded with the mold core, the product is not damaged when the mold core is drawn out, and the qualified rate of the product is improved.

Description

Technical Field

[0001] The present application relates to the technical field of molds, and in particular to a core-pulling mold. Background Art

[0002] Currently, a large number of molds in use have core-pulling structures due to the structural relationship of the products produced to meet the needs of product structure. Since the mold has a core-pulling structure, it is necessary to perform core pulling when demoulding during production so that the product can be separated from the mold.

[0003] After traditional plastic products are formed using molds, they need to be cored out to remove the product from the mold. There is a situation where the product and the core are still bonded. Direct core pulling will cause product damage and affect the product qualification rate. Utility Model Content

[0004] In order to facilitate product removal, reduce product damage, and improve product qualification rate, the present application provides a core-pulling mold.

[0005] The core-pulling mold provided in this application adopts the following technical solution:

[0006] A core-pulling mold comprises a lower mold and a core-pulling mechanism, wherein the lower mold is provided with a lower cavity, and the core-pulling mechanism comprises a fixed seat, a core and a slider, wherein the fixed seat is connected to the lower mold, and the core is connected to the fixed seat along its own axial sliding connection, and the core is used to be embedded in the lower cavity, and the slider is slidably connected to the fixed seat, and one end of the slider close to the lower cavity is coaxially connected to one end of the core, an air outlet is provided on the outer wall of the core, and the air outlet is used to blow air to the inner wall of the product, and the slider is provided with an air inlet, and the air inlet is connected to the outside, and the core-pulling mechanism is provided with an air duct, and the air duct connects the air inlet and the air outlet.

[0007] By adopting the above technical solution, gas is introduced from the air inlet, passes through the air duct, and then flows out from the air outlet, so that after the product expands slightly, the inner wall of the product is separated from the surface of the cavity, so that the product and the core are not adhered, and the product will not be damaged when the core is pulled out, thereby improving the product qualification rate.

[0008] Preferably, a plurality of the air outlets are provided, and the plurality of the air outlets are spaced apart from each other along the axial direction of the core.

[0009] By adopting the above technical solution and providing multiple air outlets, it is ensured that the core is completely separated from the product, so that the product will not be damaged during the core pulling process, thereby improving the product qualification rate.

[0010] Preferably, it also includes an upper mold, which is provided with an upper cavity, and the upper cavity, the lower cavity and the core are used to process the product. The upper mold is connected to a fixed block, and the lower mold is provided with an embedding groove, and the embedding groove is used for embedding the fixed block.

[0011] By adopting the above technical solution, the fixed block is embedded in the embedding groove to prevent the upper mold from moving relative to the lower mold in a direction perpendicular to the length of the fixed block.

[0012] Preferably, the sliding block is provided with a limiting groove, and the limiting groove is used for the fixing block to be embedded.

[0013] By adopting the above technical solution, the fixed block is embedded in the limiting groove to realize the positioning of the slider, prevent the slider and the core from being separated from the upper cavity and the lower cavity in the mold closing state, and improve the product qualification rate.

[0014] Preferably, a guide slope 1 is provided at one end of the fixed block away from the upper mold, and the guide slope 1 is located on the side of the fixed block close to the lower cavity. The distance from any point on the guide slope 1 to the side surface of the upper mold facing the lower mold increases as the point moves away from the lower cavity.

[0015] By adopting the above technical solution, the fixing block can be smoothly embedded in the limiting groove to fix the sliding block.

[0016] Preferably, a second guide bevel is provided at one end of the fixed block away from the upper mold, and the second guide bevel is located on the side of the fixed block away from the lower cavity. The distance from any point on the second guide bevel to the surface of the upper mold facing the lower mold increases as the point approaches the lower cavity. The second guide bevel is in contact with the wall of the embedding groove, and the first guide bevel is in contact with the wall of the limiting groove.

[0017] By adopting the above technical solution, it is convenient for the fixed block to be embedded in the embedding groove, the first guide bevel of the fixed block fits with the wall of the limiting groove, and the second guide bevel fits with the wall of the embedding groove, thereby locking the slider and ensuring that the core will not move axially during the injection molding process.

[0018] Preferably, there is a gap between a side surface of the fixing block away from the lower cavity and the wall of the limiting groove.

[0019] By adopting the above technical solution, space is provided for the fixed block to deform due to temperature changes, so that when the upper mold and the lower mold are separated, the fixed block can be smoothly separated from the limiting groove.

[0020] Preferably, there is a gap between a side surface of the fixing block close to the lower cavity and the wall of the embedding groove.

[0021] By adopting the above technical solution, space is provided for the fixed block to deform due to temperature changes, so that when the upper mold and the lower mold are separated, the fixed block can be smoothly separated from the embedding groove.

[0022] Preferably, two limiting grooves are provided, and the two limiting grooves are located on both sides of the axis of the slider, and the number of the fixing blocks is the same as the number of the limiting grooves and corresponds one to one.

[0023] By adopting the above technical solution, the stability of the locking of the slider by the fixed block is improved, ensuring that the slider remains stable during the injection molding process.

[0024] Preferably, the core is provided with a liquid storage cavity, the slider is provided with a cavity, the cavity is connected with the liquid storage cavity, the slider is provided with a liquid inlet connected with the cavity, and the slider is provided with a liquid outlet connected with the cavity.

[0025] By adopting the above technical solution, the cooling efficiency of the mold and the product is improved by introducing liquid, thereby improving production efficiency.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. The gas is introduced from the air inlet, passes through the airway, and then flows out from the air outlet, so that the product expands slightly, and the inner wall of the product is separated from the surface of the cavity, so that the product and the core are not adhered, and the product will not be damaged when the core is pulled out, thereby improving the product qualification rate;

[0028] 2. Set up multiple air outlets to ensure that the core is completely separated from the product, so that the product will not be damaged during the core pulling process, and the product qualification rate is improved;

[0029] 3. It is convenient for the fixed block to be embedded in the embedding groove. The first guide slope of the fixed block fits with the wall of the limiting groove, and the second guide slope fits with the wall of the embedding groove, so as to lock the slider and ensure that the core will not move axially during the injection molding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural diagram of a core pulling mold.

[0031] Figure 2 It is a schematic diagram of the explosion structure of the core pulling mold.

[0032] Figure 3 It is a cross-sectional view of the core pulling mechanism.

[0033] Figure 4 It is a structural schematic diagram of the upper die and the upper mounting seat.

[0034] Figure 5 It is a partial cross-sectional view of the core-pulling mold.

[0035] Figure 6 It is a partial cross-sectional view of the core-pulling mold.

[0036] Description of reference numerals:

[0037] 1. Lower die; 11. Lower cavity; 12. Embedding groove; 13. Mounting groove; 14. Guide column;

[0038] 2. core pulling mechanism; 21. fixed seat; 211. slide groove; 212. positioning block; 22. core; 221. air outlet; 222. liquid storage cavity; 223. air outlet channel; 23. slider; 231. limit groove; 232. cavity; 233. liquid inlet; 234. liquid outlet; 235. positioning groove; 236. air inlet channel; 237. air inlet; 24. airway;

[0039] 3. Upper mold; 31. Upper cavity; 32. Fixed block; 321. Guide slope 1; 322. Guide slope 2; 33. Positioning hole; 34. Injection runner;

[0040] 4. Lower mounting seat;

[0041] 5. Upper mounting seat; 51. Injection port. DETAILED DESCRIPTION

[0042] The present application is further described in detail below in conjunction with the accompanying drawings.

[0043] Reference Figure 1 The embodiment of the present application discloses a core-pulling mold including a lower mold 1 and a lower mounting seat 4. The lower mold 1 is fixedly connected to one side of the lower mounting seat 4.

[0044] Reference Figure 1 and Figure 2 A lower cavity 11 is provided on a side surface of the lower mold 1 away from the lower mounting seat 4 .

[0045] A core-pulling mold also includes a core-pulling mechanism 2. The outer wall of the lower mold 1 is provided with a mounting groove 13. The mounting groove 13 is connected to the lower cavity 11. The core-pulling mechanism 2 includes a fixed seat 21, a slider 23 and a core 22. One end of the fixed seat 21 extends into the mounting groove 13, and the fixed seat 21 is fixedly connected to the lower mold 1.

[0046] A slide groove 211 is provided on the surface of one side of the fixed seat 21 away from the lower mounting seat 4. The slider 23 slides along its own axis and is embedded in the slide groove 211. A positioning groove 235 is provided on the outer wall of the slider 23. The positioning groove 235 extends along the axis of the slider 23. A positioning block 212 is provided on the groove wall of the slide groove 211. The positioning groove 235 is used for the positioning block 212 to be embedded. The core 22 is coaxially fixedly connected to one end of the slider 23 close to the lower cavity 11, and the core 22 is used to be embedded in the lower cavity 11. In this embodiment, two core pulling mechanisms 2 are provided. The axes of the cores 22 of the two core pulling mechanisms 2 are not parallel, and one end of one core 22 is attached to the outer wall of the other core 22.

[0047] Reference Figure 3, the slider 23 is provided with an air inlet 237, and the air inlet 237 is connected to the outside. The air inlet 237 is located at one end of the slider 23 away from the core 22, and the air inlet 237 is located outside the mounting groove 13. The outer wall of the core 22 is provided with an air outlet 221, and the outer wall of the core 22 is used to form the inner wall of the product, so that the air outlet 221 is used to blow air to the inner wall of the product. The core pulling mechanism 2 is provided with an air duct 24, and the air duct 24 connects the air inlet 237 and the air outlet 221. There are a plurality of air outlets 221, and for any core 22, a plurality of air outlets 221 are distributed at intervals along the axial direction of the core 22. In this embodiment, the slider 23 is provided with an air inlet channel 236 connected to the air inlet 237, and the core 22 is provided with an air outlet channel 223 connected to the air outlet 221, and the air outlet channel 223 is connected to the air inlet channel 236, and the air duct 24 includes the air outlet channel 223 and the air inlet channel 236.

[0048] The slider 23 is provided with a cavity 232, and the slider 23 is provided with a liquid inlet 233 connected with the cavity 232, and the liquid inlet 233 is located at one end of the slider 23 away from the core 22, and the liquid inlet 233 is located outside the mounting groove 13. The slider 23 is provided with a liquid outlet 234 connected with the cavity 232, and the liquid outlet 234 is located at one end of the slider 23 away from the core 22, and the liquid outlet 234 is located outside the mounting groove 13. In this embodiment, the liquid inlet 233, the liquid outlet 234 and the air inlet 237 are located on the same side of the axis of the slider 23. The axis of the liquid inlet 233 is perpendicular to the axis of the slider 23, and the axis of the liquid outlet 234 is perpendicular to the axis of the slider 23. The core 22 is provided with a liquid storage cavity 222, and the liquid storage cavity 222 is connected with the cavity 232.

[0049] Reference Figure 2 and Figure 4 A core-pulling mold also includes an upper mold 3. The upper mold 3 is slidably connected to the lower mold 1, and the mold closing direction of the upper mold 3 and the lower mold 1 is parallel to the height direction of the lower mold 1. In this embodiment, the mold closing direction of the lower mold 1 and the upper mold 3 is vertical. An upper mold cavity 31 is provided on one side surface of the upper mold 3 facing the lower mold 1. The upper mold cavity 31, the lower mold cavity 11 and the core 22 are matched to process the product.

[0050] A guide post 14 is connected to a side surface of the lower mold 1 facing the upper mold 3. A positioning hole 33 is provided on a side surface of the upper mold 3 facing the lower mold 1, and the positioning hole 33 is used for the guide post 14 to be embedded. In this embodiment, four guide posts 14 are provided. The number of the positioning holes 33 is the same as the number of the guide posts 14 and corresponds one to one.

[0051] Reference Figure 2 and Figure 5, a fixed block 32 is connected to the surface of the upper mold 3 facing the lower mold 1. A embedding groove 12 is provided on the surface of the lower mold 1 facing the upper mold 3. The embedding groove 12 is located at the groove wall of the installation groove 13, and the embedding groove 12 is used for the fixed block 32 to be embedded. A second guide slope 322 is provided at the end of the fixed block 32 away from the upper mold 3. The second guide slope 322 is located on the side of the fixed block 32 away from the lower mold cavity 11. The surface of the second guide slope 322 from any point to the side of the upper mold 3 facing the lower mold 1 increases as the point approaches the lower mold cavity 11. The second guide slope 322 fits the groove wall of the embedding groove 12, and there is a gap between the surface of the fixed block 32 on the side close to the lower mold cavity 11 and the groove wall of the embedding groove 12.

[0052] Reference Figure 2 and Figure 6 The slider 23 is provided with a limiting groove 231, and the limiting groove 231 is used for the fixing block 32 to be embedded. In this embodiment, one slider 23 is provided with two limiting grooves 231. The two limiting grooves 231 are located on both sides of the axis of the slider 23. The number of the fixing blocks 32 is the same as the number of the limiting grooves 231 and corresponds one to one, and the number of the embedding grooves 12 is the same as the number of the fixing blocks 32 and corresponds one to one.

[0053] A guide slope 1 321 is provided at one end of the fixed block 32 away from the upper mold 3. The guide slope 1 321 is located on the side of the fixed block 32 close to the lower mold cavity 11. The distance from any point on the guide slope 1 321 to the surface of the upper mold 3 facing the lower mold 1 increases as the point moves away from the lower mold cavity 11. The guide slope 1 321 fits the groove wall of the limiting groove 231. There is a gap between the surface of the side of the fixed block 32 away from the lower mold cavity 11 and the limiting groove 231.

[0054] Reference Figure 2 and Figure 4 A core-pulling mold further includes an upper mounting seat 5. The upper mounting seat 5 is fixedly connected to a side of the upper mold 3 away from the lower mold 1. An injection port 51 is provided on a side of the upper mounting seat 5 away from the upper mold 3. The upper mold 3 is provided with an injection flow channel 34, and the injection flow channel 34 connects the injection port 51 and the upper cavity 31.

[0055] The implementation principle of a core-pulling mold in the embodiment of the present application is as follows: before the upper mold 3 and the lower mold 1 are molded together, the core 22 is embedded in the lower mold cavity 11, the upper mold 3 moves along the mold-closing direction, and the guide slope 321 of the fixed block 32 abuts against the groove wall of the limiting groove 231. When the upper mold 3 and the lower mold 1 are molded together, the fixed block 32 is embedded in the embedded groove 12, and the guide slope abuts against the groove wall of the embedded groove 12 to fix the slider 23 and the core 22. Glue is injected into the mold cavity through the injection port 51, and the upper mold cavity 31, the lower mold cavity 11 and the core 22 are used to process the product. After the product is cooled and formed, the upper mold 3 is separated from the lower mold 1, and the air inlet 237 is fed, and the gas is transported to the air outlet 221 through the air inlet channel 236 and the air outlet channel 223, and the gas is discharged to the inner wall of the product, so that the product is separated from the core 22, and then the core is pulled out of the gap to separate the core 22 from the product, which is convenient for taking out the product.

[0056] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A core-pulling mold, characterized in that: The invention comprises a lower mold (1) and a core pulling mechanism (2); the lower mold (1) is provided with a lower mold cavity (11); the core pulling mechanism (2) comprises a fixed seat (21), a core (22) and a slider (23); the fixed seat (21) is connected to the lower mold (1); the core (22) is connected to the fixed seat (21) in a sliding manner along its own axial direction; the core (22) is used to be embedded in the lower mold cavity (11); the slider (23) is connected to the fixed seat (21) in a sliding manner; the slider (23) is connected to the fixed seat (21) in a sliding manner One end of the block (23) close to the lower cavity (11) is coaxially connected to one end of the core (22); an air outlet (221) is provided on the outer wall of the core (22); the air outlet (221) is used to blow air to the inner wall of the product; the slider (23) is provided with an air inlet (237); the air inlet (237) is connected to the outside; the core pulling mechanism (2) is provided with an air duct (24); the air duct (24) connects the air inlet (237) and the air outlet (221).

2. The core-pulling mold according to claim 1, characterized in that: A plurality of the air outlets (221) are provided; the plurality of air outlets (221) are distributed at intervals along the axial direction of the core (22).

3. The core-pulling mold according to claim 1, characterized in that: The mold further comprises an upper mold (3); the upper mold (3) is provided with an upper mold cavity (31); the upper mold cavity (31), the lower mold cavity (11) and the mold core (22) cooperate to process the product; the upper mold (3) is connected to a fixing block (32); the lower mold (1) is provided with an embedding groove (12); the embedding groove (12) is used for embedding the fixing block (32).

4. The core-pulling mold according to claim 3, characterized in that: The sliding block (23) is provided with a limiting groove (231); the limiting groove (231) is used for the fixing block (32) to be embedded.

5. The core-pulling mold according to claim 4, characterized in that: A guiding slope 1 (321) is provided at one end of the fixed block (32) away from the upper die (3); the guiding slope 1 (321) is located on a side of the fixed block (32) close to the lower die cavity (11); and the distance from any point on the guiding slope 1 (321) to a side surface of the upper die (3) facing the lower die (1) increases as the point moves away from the lower die cavity (11).

6. The core-pulling mold according to claim 5, characterized in that: A second guiding bevel (322) is provided at one end of the fixed block (32) away from the upper die (3); the second guiding bevel (322) is located on a side of the fixed block (32) away from the lower die cavity (11); the distance from any point on the second guiding bevel (322) to the surface of the upper die (3) facing the lower die (1) increases as the point approaches the lower die cavity (11); the second guiding bevel (322) is in contact with the wall of the embedding groove (12); and the first guiding bevel (321) is in contact with the wall of the limiting groove (231).

7. The core-pulling mold according to claim 6, characterized in that: There is a gap between a side surface of the fixing block (32) away from the lower cavity (11) and the wall of the limiting groove (231).

8. The core-pulling mold according to claim 6, characterized in that: There is a gap between a side surface of the fixing block (32) close to the lower cavity (11) and the wall of the embedding groove (12).

9. The core-pulling mold according to claim 4, characterized in that: Two limiting grooves (231) are provided; the two limiting grooves (231) are located on both sides of the axis of the slider (23); the number of the fixing blocks (32) is the same as the number of the limiting grooves (231) and corresponds one to one.

10. The core-pulling mold according to claim 1, characterized in that: The core (22) is provided with a liquid storage cavity (222); the slider (23) is provided with a cavity (232); the cavity (232) is communicated with the liquid storage cavity (222); the slider (23) is provided with a liquid inlet (233) communicated with the cavity (232); and the slider (23) is provided with a liquid outlet (234) communicated with the cavity (232).

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