Demolding structure of high-precision injection mold

Abstract

The utility model relates to the technical field of injection molds, in particular to a demolding structure of a high-precision injection mold, which comprises an upper mold, a lower mold, a threaded core mold, a first mechanism and a second mechanism, one end of the spiral lifting part is fixedly connected with the threaded core mold so as to push the threaded core mold to enter or exit from the hole channel, the second mechanism is provided with a jacking part, and one end of the jacking part is connected with the upper mold and used for separating or closing the upper mold and the lower mold; the injection molding product is an internal thread product, and the thread core mold can be screwed in or out by using the spiral lifting part by adopting the demolding structure, so that a thread product satisfying a customer can be obtained by selecting and matching a proper thread core mold, and the mold has excellent adaptability.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a demoulding structure of a high-precision injection mold. Background Art

[0002] Precision injection molds are tools used to produce plastic products. Existing precision injection molds are difficult to remove from threaded fasteners due to factors such as the shape and texture of the product after molding. Frequent removal of the product can damage it, leading to product scrapping and resulting in economic losses. Utility Model Content

[0003] The purpose of the utility model is to provide a demoulding structure of a high-precision injection mold, which solves the problem of poor demoulding effect of threaded fasteners after injection molding.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a demolding structure of a high-precision injection mold, comprising an upper mold, a lower mold and a threaded core mold, the lower mold being provided with a channel for installing the threaded core mold, and further comprising a first mechanism and a second mechanism, the first mechanism having a spiral lifting part, one end of which is fixedly connected to the threaded core mold to push the threaded core mold into or out of the channel, the second mechanism having a lifting part, one end of which is connected to the upper mold, and is used for separating or closing the upper mold and the lower mold.

[0005] By adopting the above technical solution: the injection molded product is an internal thread product, and the demoulding structure can use the spiral lifting part to screw the thread core mold in or out, so that by selecting a suitable thread core mold, a customer-satisfied thread product can be obtained, which has excellent adaptability.

[0006] The spiral lifting part includes a first mold base, in which a lifting head and a first driving part for driving the lifting head to rotate are installed. The bottom end of the lower mold is fixedly connected to a threaded sleeve, one end of the threaded sleeve is used to provide a guide for the lifting head, and the other end is provided with a hole groove adapted to the lifting head. The lifting head has a thread groove and is threadedly matched with the hole groove.

[0007] By adopting the above technical solution: the lifting head is used to push the thread core mold to vertically move, and the first driving part used to drive the lifting head to rotate can make the lifting head move up and down along the inner wall of the hole groove, thereby ensuring the accuracy of the thread core mold entering.

[0008] The second mechanism includes a second mold base fixedly connected to the first mold base and a second driving part. The lifting part includes a lifting rod and a lifting seat. One end of the lifting rod is fixedly connected to the upper mold, and the other end is fixedly connected to the lifting seat. The lifting seat is slidably arranged between the first mold base and the second mold base. The second driving part is used to control the lifting seat to move along the axial direction of the lifting rod.

[0009] By adopting the above technical solution: the second driving part is combined with the lifting part to be used for closing and separating the mold between the first mold base and the lifting base, thereby realizing the function of overall demoulding of the product.

[0010] The first driving part includes a rack and a driving gear meshing with the rack. A guide groove adapted to the rack is provided on the first mold base. The driving gear is sleeved on the lifting head and linked to the lifting head. A telescopic cylinder for driving the rack to move along the guide groove is provided on the first mold base.

[0011] By adopting the above technical solution: the linear motion of the rack drives the driving gear to rotate. Since the driving gear is connected to the lifting head, when the driving gear rotates, the lifting head also rotates, so that the lifting head can move up and down along the threaded hole groove. In order to realize the automatic demoulding function, a telescopic cylinder is installed. Through the autonomous movement of the telescopic cylinder, the automatic up and down movement function of the lifting head can be realized, thereby realizing automatic demoulding.

[0012] The lifting seat is provided with a plurality of guide holes, and a guide rod is provided in the guide hole. One end of the guide rod is connected to the first mold base, and the other end is connected to the second mold base. A return spring is installed on the lifting rod between the first mold base and the lifting seat. A demolding rod is fixedly connected to the end surface of the lifting seat facing the first mold base. A first channel for inserting the demolding rod is provided in the lifting head, and a second channel connected to the first channel is provided on the threaded core mold. When the upper mold and the lower mold are closed, the top surface of the demolding rod is flush with the top surface of the threaded core mold.

[0013] By adopting the above technical solution: the lifting seat improves the displacement accuracy through the cooperation of the guide rod and the guide hole, and a return spring is installed on the lifting seat to facilitate the return of the lifting seat. In addition, the lifting seat is installed with ejector pins, which lift the threaded product in the lower mold as the lifting seat rises to facilitate demoulding. In addition, the ejector pins are rotatably installed on the lifting seat to support the lifting head, that is, the lifting head is rotatably installed in the mold through the ejector pins, thereby ensuring the stability of the mold during use.

[0014] A U-shaped bracket is connected to one side of the first mold base, and a telescopic cylinder is installed at one end of the U-shaped bracket. One end of the telescopic cylinder is fixedly connected to one end of the rack, and the telescopic cylinder is a gravity cylinder.

[0015] By adopting the above technical solution: a gravity oil cylinder is used to adjust the displacement change of the rack to ensure the rising accuracy of the lifting head.

[0016] The technical effects and advantages of this utility model are:

[0017] 1. In this solution, the injection molded product is an internal thread product. By adopting this demoulding structure, the thread core mold can be screwed in or out by using the spiral lifting part, so that by selecting the appropriate thread core mold, a customer-satisfied thread product can be obtained, which has excellent adaptability.

[0018] 2. In this solution, the lifting head is used to push the thread core mold to vertically displace, and the first driving part used to drive the lifting head to rotate can make the lifting head move up and down along the inner wall of the hole groove, thereby ensuring the accuracy of the thread core mold entering. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a cross-sectional structural diagram of the demoulding structure of the high-precision injection mold according to an embodiment of the present utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0021] Figure 3 This is a structural diagram of a threaded sleeve of a demoulding structure of a high-precision injection mold according to an embodiment of the present utility model;

[0022] Figure 4 A schematic structural diagram of the first mechanism provided in an embodiment of the present utility model;

[0023] Figure 5 A schematic diagram of a state of the second mechanism provided in an embodiment of the present utility model;

[0024] Figure 6 This is a schematic diagram of another state of the second mechanism provided in an embodiment of the present utility model.

[0025] Figure numerals: 1. Upper mold; 2. Lower mold; 3. Threaded core mold; 4. Lifting head; 401. Threaded groove; 5. Threaded sleeve; 501. Hole groove; 6. Rack; 7. Driving gear; 8. First mold base; 801. Guide groove; 9. Lifting seat; 10. Lifting rod; 11. Telescopic cylinder; 12. Upper mold mounting seat; 13. Guide rod; 14. Second mold base; 15. U-shaped bracket; 16. Ejector rod; 17. Return spring; 18. Positioning rod. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] This embodiment provides Figure 1 、 2 A demolding structure of a high-precision injection mold shown in Figure 3 includes an upper mold 1, a lower mold 2 and a threaded core mold 3. The lower mold 2 is provided with a channel for installing the threaded core mold 3. This embodiment also includes a first mechanism and a second mechanism, wherein the first mechanism has a spiral lifting part, one end of the spiral lifting part is fixedly connected to the threaded core mold 3 to push the threaded core mold 3 into or out of the channel, and the second mechanism has a lifting part, one end of the lifting part is connected to the upper mold 1, and is used for separating or closing the upper mold 1 and the lower mold 2.

[0028] Specifically, since the injection molded product of this embodiment is an internal thread product, the present demoulding structure can use the spiral lifting part to screw the thread core mold 3 in or out, so that by selecting a suitable thread core mold 3, a customer-satisfied thread product can be obtained, which has excellent adaptability.

[0029] refer to Figure 5 Or 6. In this embodiment, the spiral lifting part includes a first mold base 8, the lifting head 4 and the first driving part that drives the lifting head 4 to rotate are both installed in the first mold base 8, and the bottom end of the lower mold 2 is fixedly connected to a threaded sleeve 5. One end of the threaded sleeve 5 is used to provide a guide for the lifting head 4, and the other end is provided with a hole groove 501 adapted to the lifting head 4. The lifting head 4 has a threaded groove 401 and a hole groove 501 that is threadedly matched.

[0030] Furthermore, the lifting head 4 is used to push the thread core mold 3 to vertically move, and the first driving part used to drive the lifting head 4 to rotate can make the lifting head 4 move up and down along the inner wall of the hole groove 501 of the threaded sleeve 5, thereby ensuring the accuracy of the entry of the thread core mold 3.

[0031] In addition, the second mechanism of this embodiment includes a second mold base 14 fixedly connected to the first mold base 8 and a second driving part, and the lifting part includes a lifting rod 10 and a lifting seat 9, one end of the lifting rod 10 is fixedly connected to the upper mold 1, and the other end is fixedly connected to the lifting seat 9. Specifically, Figure 6As shown, this embodiment also has an upper mold mounting base 12, and the upper mold 1 is fixedly mounted on the bottom of the upper mold mounting base 12, and positioning rods 18 are connected around the bottom end of the upper mold mounting base 12. Positioning grooves that cooperate with the positioning rods 18 are opened around the first mold base 8. The upper mold mounting base 12 and the first mold base 8 are matched with the positioning grooves through the positioning rods 18 to improve the matching accuracy between the upper mold 1 and the lower mold 2.

[0032] In addition, the lifting seat 9 is slidably disposed between the first mold base 8 and the second mold base 14. The second driving unit is used to control the movement of the lifting seat 9 along the axis of the lifting rod 10. The second driving unit is combined with the lifting unit to close and separate the molds between the first mold base 8 and the lifting seat 9, thereby realizing the function of demolding the entire product.

[0033] like Figure 4 As shown, the first driving part includes a rack 6 and a driving gear 7 meshing with the rack 6. A guide groove 801 adapted to the rack 6 is provided on the first mold base 8. The driving gear 7 is mounted on the lifting head 4 and is arranged in a linkage with the lifting head 4. The first mold base 8 is provided with a telescopic oil cylinder 11 for driving the rack 6 to move along the guide groove 801. During operation, the linear motion of the rack 6 drives the driving gear 7 to rotate. Since the driving gear 7 is also arranged in a linkage with the lifting head 4, that is, the rotation axis of the driving gear 7 coincides with the rotation axis of the lifting head 4, when the driving gear 7 rotates, the lifting head 4 also rotates, so that the lifting head 4 can move up and down along the threaded hole 501. In order to realize the automatic demoulding function, a telescopic oil cylinder 11 is also installed on the first mold base 8 of this embodiment. Through the autonomous movement of the telescopic oil cylinder 11, the automatic up and down movement function of the lifting head 4 can be realized, thereby realizing automatic demoulding.

[0034] like Figure 5 and Figure 6As shown, a plurality of guide holes are provided on the lifting seat 9, and a guide rod 13 is provided in the guide hole. One end of the guide rod 13 is connected to the first mold base 8, and the other end is connected to the second mold base 14. A return spring 17 is installed on the lifting rod 10 between the first mold base 8 and the lifting seat 9. A demolding rod 16 is fixedly connected to the end face of the lifting seat 9 facing the first mold base 8. A first channel for inserting the demolding rod 16 is provided in the lifting head 4, and a second channel connected to the first channel is provided on the threaded core mold 3. When the upper mold 1 and the lower mold 2 are closed, the top surface of the demolding rod 16 is flush with the top surface of the threaded core mold 3. Since the lifting seat 9 improves the displacement accuracy through the cooperation of the guide rod 13 and the guide hole, a return spring 17 is also installed on the lifting seat 9 to facilitate the return of the lifting seat 9. In addition, the lifting seat 9 is installed with ejector rods 16. These ejector rods 16 lift the threaded product in the lower mold 2 after the lifting seat 9 rises to facilitate demoulding. In addition, the ejector rods 16 are rotatably installed on the lifting seat 9 to support the lifting head 4, that is, the lifting head 4 is rotatably installed in the mold through the ejector rods 16, thereby ensuring the stability of the mold during use.

[0035] In this embodiment, a U-shaped bracket 15 is connected to one side of the first mold base 8. A telescopic cylinder 11 is mounted on one end of the U-shaped bracket 15. One end of the telescopic cylinder 11 is fixedly connected to one end of the rack 6. The telescopic cylinder 11 is a gravity cylinder. The gravity cylinder is used to adjust the displacement of the rack 6 to ensure the lifting accuracy of the lifting head 4.

[0036] When demoulding, the threaded core mold 3 is demoulded first, and the rack is pulled along the guide groove 801 by the gravity cylinder, driving the lifting head 4 to rotate and descend, and separate from the product without damaging the product's accuracy.

[0037] Furthermore, when the demolding continues after the threaded core mold is demolded, a lifting machine is installed at the bottom of the second mold base 14 to push the lifting base 9 to move upward. At this time, the lifting base 9 moves upward to compress the return spring 17 and lift the upper mold mounting base 12. At this time, since the ejector rod 16 is also fixedly linked to the ejector seat 9, when the ejector seat 9 rises, the ejector rod 16 will also lift the finished product in the injection cavity to complete the demolding of the product.

[0038] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A demoulding structure for a high-precision injection mold, comprising an upper mold (1), a lower mold (2) and a threaded core mold (3), wherein the lower mold (2) is provided with a channel for installing the threaded core mold (3), characterized in that: The invention also includes a first mechanism and a second mechanism, wherein the first mechanism has a spiral lifting portion, one end of which is fixedly connected to the threaded core mold (3) to push the threaded core mold (3) into or out of the channel, and the second mechanism has a lifting portion, one end of which is connected to the upper mold (1) to separate or close the upper mold (1) and the lower mold (2).

2. A demoulding structure for a high-precision injection mold according to claim 1, characterized in that: The spiral lifting part comprises a first die base (8), in which a lifting head (4) and a first driving part for driving the lifting head (4) to rotate are installed. The bottom end of the lower die (2) is fixedly connected to a threaded sleeve (5), one end of the threaded sleeve (5) is used to provide a guide for the lifting head (4), and the other end is provided with a hole groove (501) adapted to the lifting head (4). The lifting head (4) has a threaded groove (401) and is threadedly matched with the hole groove (501).

3. A demoulding structure for a high-precision injection mold according to claim 2, characterized in that: The second mechanism comprises a second die base (14) fixedly connected to the first die base (8) and a second driving part, the lifting part comprises a lifting rod (10) and a lifting seat (9), one end of the lifting rod (10) is fixedly connected to the upper die (1), and the other end is fixedly connected to the lifting seat (9), the lifting seat (9) is slidably arranged between the first die base (8) and the second die base (14), and the second driving part is used to control the lifting seat (9) to move along the axial direction of the lifting rod (10).

4. A demoulding structure for a high-precision injection mold according to claim 3, characterized in that: The first driving part comprises a rack (6) and a driving gear (7) meshing with the rack (6); a guide groove (801) adapted to the rack (6) is provided on the first die base (8); the driving gear (7) is sleeved on the lifting head (4) and is arranged in linkage with the lifting head (4); and a telescopic oil cylinder (11) for driving the rack (6) to move along the guide groove (801) is provided on the first die base (8).

5. A demoulding structure for a high-precision injection mold according to claim 4, characterized in that: The lifting seat (9) is provided with a plurality of guide holes, in which a guide rod (13) is provided. One end of the guide rod (13) is connected to the first die seat (8), and the other end is connected to the second die seat (14). A return spring (17) is installed on the lifting rod (10) between the first die seat (8) and the lifting seat (9). A demolding rod (16) is fixedly connected to the end face of the lifting seat (9) facing the first die seat (8). A first channel for inserting the demolding rod (16) is provided in the lifting head (4). A second channel connected to the first channel is provided on the threaded core mold (3). When the upper mold (1) and the lower mold (2) are closed, the top surface of the demolding rod (16) is flush with the top surface of the threaded core mold (3).

6. A demoulding structure for a high-precision injection mold according to claim 4, characterized in that: One side of the first mold base (8) is connected to a U-shaped bracket (15), and a telescopic oil cylinder (11) is installed on one end of the U-shaped bracket (15). One end of the telescopic oil cylinder (11) is fixedly connected to one end of the rack (6), and the telescopic oil cylinder (11) adopts a gravity oil cylinder.

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