Embedded nut injection mold structure

Abstract

The utility model relates to the field of injection mold design, in particular to an embedded nut injection mold structure which comprises a lower mold and an upper mold, the upper mold is clamped at the top of the lower mold, a first mounting groove is formed in the middle of the top of the upper mold, a mounting seat is clamped in the first mounting groove, and the first mounting groove and the mounting seat are fixedly connected through a screw; a second mounting groove is formed in the end, located in the upper mold cavity, of the mounting base, second protruding blocks on the two sides of one end of the fixing block slide into the first sliding grooves, the fixing block is rotated, the second protruding blocks enter the second sliding grooves to be fixed, the fixing block and the mounting base are detachable, the nut position is convenient to clean and replace, and arc-shaped plates are mounted in the middles of the two sides of the fixing block in a clamped mode. A plurality of limiting blocks are evenly arranged on the side, close to the groove, of the arc-shaped plate and clamped into reserved clamping grooves of the nuts, the fixing effect is achieved, and the nuts are prevented from moving in the injection molding process.

Description

Technical Field

[0001] This utility model relates to the field of injection mold design, specifically to a pre-embedded nut injection mold structure. Background Technology

[0002] In many injection molded products, nuts are often pre-embedded in the product to facilitate subsequent assembly or fixing.

[0003] However, the existing technology has the following drawbacks:

[0004] However, due to insufficient mold positioning accuracy, the pre-embedded nut may be misaligned or have an incorrect angle, affecting subsequent assembly. In other cases, due to unreasonable mold design, the injection pressure may cause the nut to shift or fall off, resulting in pre-embedding failure. Furthermore, traditional pre-embedded nut molds have complex structures, are inconvenient to disassemble and clean, and are difficult to replace the nut position, increasing maintenance costs. Utility Model Content

[0005] The purpose of this utility model is to provide a pre-embedded nut injection mold structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pre-embedded nut injection mold structure, including a lower mold and an upper mold, wherein the top of the lower mold is engaged with the bottom of the upper mold, a first mounting groove is provided in the middle of the top of the upper mold, a mounting seat is engaged inside the first mounting groove, a second mounting groove is provided in the middle of one end of the mounting seat in the cavity of the upper mold, a fixing block is fixedly installed inside the second mounting groove, a slot is provided in the middle of both sides of the fixing block, and an arc-shaped plate is engaged inside the slot, and three limiting blocks are evenly distributed on the concave side of the arc-shaped plate.

[0007] The above technical solution features a fixing block with a pre-embedded nut fixed at the bottom of the mounting base. Both the mounting base and the fixing block are detachable, facilitating cleaning and replacement of the nut position.

[0008] A fixing plate is fixedly installed at the bottom of the lower mold. The length and width of the fixing plate are both greater than the length and width of the bottom of the lower mold. Each of the four corners of the fixing plate is provided with a first threaded through hole. The opening end of the lower mold is provided with a concave structure and a sealing gasket is adhered to the outer wall of the concave structure. The opening end of the upper mold is provided with a convex structure. The concave structure and the convex structure are engaged and connected.

[0009] Using the above technical solution, the two arc-shaped plates are respectively snapped into place on both sides of the fixing block, and the limiting block is snapped into the groove reserved in the nut along with the arc-shaped plates, so as to play a limiting and fixing role.

[0010] The first mounting groove has a concave structure on the inner side of the top, and threaded holes are opened at the four corners of the bottom inner wall of the concave structure. The mounting base has a convex plate around its top, and a second threaded through hole is opened at the four corners of the convex plate. Screws are threaded into the second threaded through hole and the threaded hole in sequence.

[0011] The above technical solution incorporates a sealing gasket bonded to the inner wall of the first mounting groove, which enhances the sealing performance.

[0012] The top of the front and back inner walls of the second mounting groove are provided with a first sliding groove, and the middle of the inner walls on both sides of the second mounting groove are provided with a second sliding groove. The second sliding groove is arc-shaped and one end of it is connected to the bottom of the first sliding groove. The bottom of both sides of the fixing block is provided with a second protrusion.

[0013] In the above technical solution, the second protrusion is inserted from the top of the first groove, slides down to the bottom, and then rotates the fixing block, which enters the second groove to play a fixing role.

[0014] Several first protrusions are evenly fixedly installed around the top of the side wall of the fixing block. The cross-sectional shape of the first protrusion is an isosceles trapezoid, and the top cross-sectional shape of the fixing block is gear-shaped. A temperature control device is provided inside the fixing block near the end of the first protrusion.

[0015] Using the above technical solution, the temperature control device can be wirelessly connected to an external controller. The controller can adjust the temperature to ensure that the temperature in the area is stable, thus avoiding uneven material shrinkage caused by temperature fluctuations that could affect the nut positioning.

[0016] The inner walls of the card slot are stepped and a sealing gasket is adhered to the inner wall of the card slot. A second groove is provided in the middle of the end of the fixing block away from the mounting base, and a rubber gasket is adhered to the inner wall of the second groove.

[0017] The above technical solution includes a rubber pad inside the second groove to accommodate minor errors, enabling automatic correction and nut fixation.

[0018] A first injection port is provided on one side of the top of the upper mold, a second injection port is provided at the middle position of the top of the upper mold near the first mounting groove, two transverse cooling pipes are symmetrically provided in the middle of the upper mold, and a plurality of first grooves are evenly provided at the bottom of one side of the upper mold.

[0019] The above technical solution allows the first groove to be easily pried open from the upper mold, and the second injection port to be close to the mounting base, which enables the molten plastic to evenly cover the pre-embedded nut during injection, while avoiding the plastic from directly impacting the nut and causing displacement.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] The high-precision machined pre-embedded positioning groove, combined with the elastic sealing ring, enables automatic correction and stable positioning of the nut. The arc plate locks and fixes the nut with the limit block to prevent the nut from shifting during injection molding. The mounting base and fixing block adopt a detachable modular design, which facilitates quick replacement and maintenance, and improves the mold production efficiency and adaptability. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a front sectional view of the upper mold of this utility model.

[0024] Figure 3 This is a schematic diagram of the connection structure between the mounting base and the fixing block of this utility model;

[0025] Figure 4 This is a schematic diagram of the mounting base structure of this utility model;

[0026] Figure 5 This is a top view of the fixing block structure of this utility model;

[0027] Figure 6 This is a planar schematic diagram of the arc-shaped plate structure of this utility model.

[0028] In the diagram: 1. Fixing plate; 2. Lower mold; 3. Upper mold; 4. First injection port; 5. Mounting base; 6. Second injection port; 7. First groove; 8. First threaded through hole; 9. Cooling pipe; 10. First mounting groove; 11. Threaded hole; 12. Second threaded through hole; 13. Second mounting groove; 14. Temperature control device; 15. Fixing block; 16. Second groove; 17. Rubber pad; 18. First protrusion; 19. Slot; 20. Arc plate; 21. Second protrusion; 22. First slide groove; 23. Second slide groove; 24. Limiting block. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-6This utility model provides a pre-embedded nut injection mold structure, including a lower mold 2 and an upper mold 3. The top of the lower mold 2 is engaged with the bottom of the upper mold 3. A first mounting groove 10 is provided in the middle of the top of the upper mold 3. A mounting seat 5 is engaged inside the first mounting groove 10. A second mounting groove 13 is provided in the middle of one end of the mounting seat 5 in the cavity of the upper mold 3. A fixing block 15 is fixedly installed inside the second mounting groove 13. A slot 19 is provided in the middle of both sides of the fixing block 15, and an arc plate 20 is engaged inside the slot 19. Three limiting blocks 24 are evenly distributed on the concave side of the arc plate 20. The corners of the mounting seat 5 are rounded and chamfered.

[0031] A fixing plate 1 is fixedly installed at the bottom of the lower mold 2. The length and width of the fixing plate 1 are both greater than the length and width of the bottom of the lower mold 2. The four corners of the fixing plate 1 are provided with first threaded through holes 8. The opening end of the lower mold 2 is provided with a concave structure and a sealing gasket is bonded to the outer wall of the concave structure. The opening end of the upper mold 3 is provided with a convex structure. The concave structure and the convex structure are engaged and connected. The lower mold 2 is fixed to the table surface by bolts through the first threaded through holes 8 at the four corners of the fixing plate 1.

[0032] The first mounting groove 10 has a concave structure on the inner side of its top, and threaded holes 11 are provided at the four corners of the bottom inner wall of the concave structure. The mounting base 5 has a convex plate around its top, and a second threaded through hole 12 is provided at the four corners of the convex plate. Screws are threaded into the second threaded through hole 12 and the threaded hole 11 in sequence. The mounting base 5 is detachable.

[0033] The top of the inner wall of the front and back of the second mounting groove 13 is provided with a first sliding groove 22, and the middle of the inner wall of both sides of the second mounting groove 13 is provided with a second sliding groove 23. The second sliding groove 23 is arc-shaped and one end of it is connected to the bottom of the first sliding groove 22. The bottom of both sides of the fixing block 15 is provided with a second protrusion 21, and the length of the second sliding groove 23 is a quarter arc.

[0034] Several first protrusions 18 are evenly fixedly installed around the top of the side wall of the fixing block 15. The cross-sectional shape of the first protrusion 18 is an isosceles trapezoid, and the top cross-sectional shape of the fixing block 15 is gear-shaped. A temperature control device 14 is provided inside the fixing block 15 near the first protrusion 18. The temperature control device 14 is model BWY-804J.

[0035] The inner walls of the slot 19 are stepped and a sealing gasket is bonded to the inner wall of the slot 19. A second groove 16 is provided in the middle of the end of the fixing block 15 away from the mounting base 5. A rubber gasket 17 is bonded to the inner wall of the second groove 16. The two ends of the arc plate 20 are stepped.

[0036] A first injection port 4 is provided on one side of the top of the upper mold 3. A second injection port 6 is provided at the middle position of the top of the upper mold 3 near the first mounting groove 10. Two horizontal cooling pipes 9 are symmetrically provided in the middle of the upper mold 3. Multiple first grooves 7 are evenly provided at the bottom of one side of the upper mold 3. The cooling pipes 9 extend outward at both ends.

[0037] Working principle: When using this utility model, first place the lower mold 2 in a suitable position on the table, then use bolts to fix it through the first threaded through holes 8 at the four corners of the fixing plate 1, insert one end of the nut into the second groove 16 on the fixing block 15, and respectively snap the two arc plates 20 into the slots 19 on both sides of the fixing block 15. The limiting block 24 is snapped into the groove reserved by the nut. The second protrusions 21 on both sides of the bottom of the fixing block 15 are inserted from the top of the first slide groove 22, and then slide down to the bottom of the first slide groove 22. Then rotate the fixing block 15 so that the second protrusions 21 enter the second slide groove 23 for fixing. Then snap the mounting base 5 into the first mounting groove 10 and fix it with screws at the four corners. Snap the upper mold 3 into the top of the lower mold 2, and inject the molten liquid through the first injection port 4 and the second injection port 6. After the injection is completed, cool water is introduced from one end of the cooling pipe 9.

[0038] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pre-embedded nut injection mold structure, comprising a lower mold (2) and an upper mold (3), characterized in that: The top of the lower mold (2) is engaged with the bottom of the upper mold (3). A first mounting groove (10) is provided in the middle of the top of the upper mold (3). A mounting seat (5) is engaged inside the first mounting groove (10). A second mounting groove (13) is provided in the middle of one end of the upper mold (3) cavity of the mounting seat (5). A fixing block (15) is fixedly installed inside the second mounting groove (13). A slot (19) is provided in the middle of both sides of the fixing block (15), and an arc plate (20) is engaged inside the slot (19). Three limiting blocks (24) are evenly distributed on the concave side of the arc plate (20).

2. The pre-embedded nut injection mold structure according to claim 1, characterized in that: The bottom of the lower mold (2) is fixedly installed with a fixing plate (1). The length and width of the fixing plate (1) are both greater than the length and width of the bottom of the lower mold (2). The four corners of the fixing plate (1) are provided with first threaded through holes (8). The opening end of the lower mold (2) is provided with a concave structure and a sealing gasket is bonded to the outer wall of the concave structure. The opening end of the upper mold (3) is provided with a convex structure. The concave structure and the convex structure are engaged and connected.

3. The pre-embedded nut injection mold structure according to claim 1, characterized in that: The first mounting groove (10) has a concave structure on the inner side of its top, and threaded holes (11) are opened at the four corners of the bottom inner wall of the concave structure. The mounting base (5) has a convex plate around its top, and a second threaded through hole (12) is opened at the four corners of the convex plate. Screws are installed in sequence inside the second threaded through hole (12) and the threaded hole (11).

4. The injection mold structure for pre-embedded nuts according to claim 1, characterized in that: The top of the front and back inner walls of the second mounting groove (13) are provided with a first sliding groove (22), and the middle of the inner walls on both sides of the second mounting groove (13) are provided with a second sliding groove (23). The second sliding groove (23) is arc-shaped and one end of it is connected to the bottom of the first sliding groove (22). The bottom of both sides of the fixing block (15) is provided with a second protrusion (21).

5. The pre-embedded nut injection mold structure according to claim 1, characterized in that: Several first protrusions (18) are evenly fixed around the top of the side wall of the fixing block (15). The cross-sectional shape of the first protrusion (18) is an isosceles trapezoid, and the top cross-sectional shape of the fixing block (15) is gear-shaped. A temperature control device (14) is provided inside the fixing block (15) near the first protrusion (18).

6. The injection mold structure for pre-embedded nuts according to claim 1, characterized in that: The inner walls of the slot (19) are stepped and the inner walls of the slot (19) are bonded with sealing gaskets. The middle of the fixed block (15) away from the mounting base (5) is provided with a second groove (16) and the inner wall of the second groove (16) is bonded with a rubber gasket (17).

7. The pre-embedded nut injection mold structure according to claim 1, characterized in that: The upper mold (3) has a first injection port (4) on one side of its top, and a second injection port (6) is provided at the middle position of the upper mold (3) near the first mounting groove (10). Two transverse cooling pipes (9) are symmetrically provided in the middle of the upper mold (3), and multiple first grooves (7) are evenly provided at the bottom of one side of the upper mold (3).

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