Injection mold sprue bush

Abstract

The utility model relates to the technical field of injection molds, in particular to an injection mold sprue bush which comprises a feeding section, a diffusion hole is formed in the feeding section, a first pouring hole is formed in the bottom of the diffusion hole, one end of the first pouring hole communicates with the bottom of the feeding section, and the bottom of the feeding section is sleeved with a communicating section; an assembling section matched with the feeding section is machined and formed at the top of the communicating section, an assembling hole is formed in the assembling section, the bottom of the assembling hole is communicated with a second pouring hole, one end of the second pouring hole is communicated to the bottom of the communicating section, a fastening hole is formed in the top of the feeding section, and a fastening assembly is inserted into the fastening hole. The injection mold comprises a mold body, the mold body abuts against the assembly section, a fixing hole corresponding to the fastening hole is formed in the mold body, the fastening assembly can be inserted and clamped into the fixing hole, and the effects of simplifying the mounting steps of the sprue bush and improving the injection molding work efficiency are achieved.

Description

Technical Field

[0001] This application relates to the technical field of injection molds, and particularly to a sprue bushing of an injection mold. Background Art

[0002] An injection mold is a tool for producing plastic products. The plastic melted by heating is injected into the cavity of the injection mold from the sprue bushing by a high pressure of an injection molding machine. After cooling and solidifying, a formed product is obtained. The sprue bushing is also called a nozzle, a pouring nozzle, or a sprue pouring nozzle. It is a part of the runner that allows the molten plastic material to be injected from the nozzle of the injection molding machine into the mold interior, and is a metal fitting for connecting the molding mold and the injection molding machine.

[0003] The existing sprue bushing and the connecting pipe are integrally formed and fixed on the casting mold by bolts. In order to ensure accurate installation of the sprue, generally, the sprue bushing is embedded in the end face of the mold. When the pouring hole is blocked during pouring, the sprue bushing needs to be removed and the pouring hole needs to be cleaned.

[0004] The above-mentioned existing technical solutions have the following defects: The sprue bushing is fixedly connected to the casting mold by bolts, and the disassembly and assembly process is cumbersome. Frequent disassembly of the sprue bushing will reduce the efficiency of the injection molding work. Summary of the Utility Model

[0005] This application provides a sprue bushing for an injection mold in order to simplify the installation steps of the sprue bushing and improve the injection molding work efficiency.

[0006] The above technical object of this application is achieved through the following technical solutions:

[0007] The sprue bushing of the injection mold includes a feeding section. A diffusion hole is provided on the feeding section. A first pouring hole is provided at the bottom of the diffusion hole. One end of the first pouring hole communicates with the bottom of the feeding section. A connecting section is sleeved at the bottom of the feeding section. An assembly section matching with the feeding section is formed at the top of the connecting section. An assembly hole is provided on the assembly section. A second pouring hole communicates with the bottom of the assembly hole. One end of the second pouring hole communicates with the bottom of the connecting section. A fastening hole is provided at the top of the feeding section. A fastening component is inserted into the fastening hole. The injection mold includes a mold body. The mold body abuts against the assembly section. A fixing hole corresponding to the fastening hole is provided on the mold body. The fastening component can be inserted into and clamped in the fixing hole.

[0008] By adopting the above technical solutions, the feeding section can be taken out from the connecting section, which is convenient for the staff to clean the plastic in the first pouring hole and the second pouring hole. After cleaning, the bottom of the feeding section is inserted into the top of the connecting section, and the fastening component is used to fix the feeding section and the connecting section on the mold body. It can reduce the operation steps of the staff for disassembling and assembling the sprue bushing, reduce the time for disassembling and assembling the sprue bushing, and at the same time ensure the overall structural strength and sealing performance of the sprue bushing, and improve the injection molding work efficiency.

[0009] Optionally, the fastening assembly includes a plug rod inserted into the fastening hole. One end of the plug rod is formed with a large head end, and a rotating column is inserted into the large head end. A counterbore with a hexagonal inner wall is formed on the rotating column. A rotating rod is integrally formed at the bottom of the rotating column. The rotating rod is inserted into the plug rod, and one section of the rotating rod is threadedly connected to the inner wall of the plug rod. A retaining hole is formed at the bottom of the plug rod, and a steel ball is slidably arranged in the retaining hole. The diameter of the orifice of the retaining hole is smaller than the diameter of the steel ball.

[0010] By adopting the above technical solutions, the feeding section and the connecting section can be fixed on the mold body. When disassembling and assembling the nozzle sleeve, the steel ball is controlled to be embedded in the annular groove by moving the rotating rod up and down in the plug rod, so as to realize the fixation of the fastening assembly and the mold body, which can reduce the operation steps of the staff when disassembling and assembling the nozzle sleeve, and at the same time ensure the tight connection between the feeding section and the connecting section and the mold body.

[0011] Optionally, the bottom of the plug rod is formed with a spherical end.

[0012] By adopting the above technical solutions, it is convenient for the staff to insert the plug rod into the fastening hole, and at the same time it is convenient for the plug rod to be inserted into the fixing groove.

[0013] Optionally, the bottom of the feeding section is formed into a conical shape with an arc-shaped peripheral wall, and the inner wall of the assembly hole is formed with an arc shape matching the bottom of the feeding section.

[0014] By adopting the above technical solutions, it is convenient for the staff to connect the feeding section and the connecting section, and at the same time it can increase the sealing performance at the connection between the feeding section and the connecting section, and ensure the stability and reliability during the injection molding work of the nozzle sleeve.

[0015] Optionally, a first sealing ring groove is formed on the inner wall of the assembly hole, a second sealing ring groove is formed at the bottom of the feeding section, and the orifices of the first sealing ring groove and the second sealing ring groove are opposite to each other, and a sealing gasket is jointly embedded in the first sealing ring groove and the second sealing ring groove.

[0016] By adopting the above technical solutions, the sealing performance at the connection between the feeding section and the connecting section can be increased, and the stability and reliability during the injection molding work of the nozzle sleeve can be ensured.

[0017] Optionally, the diameter of the orifice at one end of the second pouring hole is smaller than the diameter of the inner wall of the second pouring hole.

[0018] By adopting the above technical solutions, it is convenient for the cooled plastic to break away from the second pouring hole.

[0019] Optionally, positioning blocks are provided on the peripheral wall of the feeding section. A positioning rod is fixedly connected to the positioning block. The positioning rod can be inserted into the feeding section, and a positioning groove matching the positioning block is provided on the mold body.

[0020] By adopting the above technical solution, it is ensured that the pressure of the injection molding machine during the injection molding operation will not cause the sprue bushing to move, and the stability of the sprue bushing during the injection molding operation is ensured.

[0021] Optionally, a first annular groove is provided on the peripheral wall of the feeding section, a second annular groove is provided on the peripheral wall of the assembly section, and a clamping strip is fixedly connected to the positioning block. At least two clamping strips are provided. When the feeding section and the connecting section are connected, the two clamping strips can be respectively inserted into the first annular groove and the second annular groove.

[0022] By adopting the above technical solution, the feeding section and the assembly section can be limited, the tightness of the connection between the feeding section and the connecting section is ensured, and the stability and reliability of the sprue bushing during the injection molding operation are ensured.

[0023] In summary, the present application has the following technical effects:

[0024] 1. By providing a feeding section, an assembly section, a connecting section and a fastening assembly, the operation steps of the staff for disassembling and assembling the sprue bushing can be reduced, the time for disassembling and assembling the sprue bushing can be reduced, and at the same time, the overall structural strength and sealing performance of the sprue bushing are ensured, and the injection molding work efficiency is improved;

[0025] 2. By providing a plug rod, a rotating rod, an anti-detachment hole and steel balls, the operation steps of the staff when disassembling and assembling the sprue bushing can be reduced, and at the same time, the tight connection between the feeding section and the connecting section and the mold body is ensured;

[0026] 3. By providing a positioning block, a positioning groove, a clamping strip, a first annular groove and a second annular groove, the feeding section and the assembly section can be limited, the tightness of the connection between the feeding section and the connecting section is ensured, and the stability and reliability of the sprue bushing during the injection molding operation are ensured. Description of the Drawings

[0027] Figure 1 is the external shape structure diagram of the present application;

[0028] Figure 2 is the vertical sectional structure diagram of the present application;

[0029] Figure 3 is the present application Figure 2 The enlarged view at A in.

[0030] Description of reference numerals: 1. Feeding section; 11. Diffusion hole; 12. First pouring hole; 13. Fastening hole; 14. Second sealing ring groove; 15. First ring groove; 2. Connecting section; 21. Assembly section; 211. Assembly hole; 212. First sealing ring groove; 213. Second ring groove; 22. Second pouring hole; 3. Fastening assembly; 31. Plug rod; 311. Big head end; 312. Spherical end; 32. Rotating column; 33. Countersunk hole; 34. Rotating rod; 35. Anti - detachment hole; 36. Steel ball; 4. Mold body; 41. Fixed hole; 42. Annular groove; 43. Positioning groove; 5. Sealing gasket; 6. Positioning block; 61. Positioning rod; 62. Card strip. Detailed implementation mode

[0031] The following further details this application in conjunction with the attached drawings.

[0032] The embodiment of this application discloses a sprue bushing for an injection mold. Referring to Figure 1 and Figure 2 the sprue bushing for an injection mold includes a feeding section 1. At the center position of the top of the feeding section 1, a diffusion hole 11 for abutting against an injection molding machine is provided. At the bottom of the diffusion hole 11, a first pouring hole 12 is provided. One end of the first pouring hole 12 communicates with the diffusion hole 11, and the other end communicates with the bottom of the feeding section 1. A connecting section 2 is sleeved at the bottom of the feeding section 1. At the top of the connecting section 2, an assembly section 21 is formed by machining, and the diameter of the top surface of the assembly section 21 is the same as that of the top surface of the feeding section 1. An assembly hole 211 matching the bottom of the feeding section 1 is provided on the top surface of the assembly section 21. The bottom of the assembly hole 211 communicates with a second pouring hole 22. One end of the second pouring hole 22 communicates with the top surface of the assembly hole 211, and the other end communicates with the bottom of the connecting section 2.

[0033] At the top of the feeding section 1, four fastening holes 13 are provided at intervals along the edge of the top surface of the feeding section 1, and the fastening holes 13 communicate with the side of the connecting section 2 away from the feeding section 1. A fastening assembly 3 is inserted into the fastening holes 13. The injection mold includes a mold body 4. The top surface of the mold body 4 abuts against the bottom surface of the assembly section 21. Four fixed holes 41 are provided on the top surface of the mold body 4 and correspond to the four fastening holes 13 one by one, and the bottom end of the fastening assembly 3 is inserted into and clamped in the fixed holes 41.

[0034] When using this sprue bushing for an injection mold, after inserting the bottom of the feeding section 1 of the sprue bushing for an injection mold into the top of the connecting section 2, insert the bottom of the connecting section 2 into the mold body 4. Insert the fastening assembly 3 into the fastening holes 13. At the same time, the bottom of the fastening assembly 3 is inserted into and clamped in the fixed holes 41 of the mold body 4. The feeding section 1 and the connecting section 2 are limited by the fastening assembly 3 and the feeding section 1 and the limiting section are fixed on the mold body 4. During pouring, the injection molding machine abuts against the diffusion hole 11, and the molten plastic flows into the injection mold through the first pouring hole 12 and the second pouring hole 22.

[0035] When the pouring hole of the gate sleeve is blocked, the staff can release the connection between the mold body 4 and the feed section 1 and the connecting section 2 by turning the fastening component 3 to unlock it. After the staff removes the feed section 1 and the connecting section 2, the feed section 1 can be taken out of the connecting section 2, which is convenient for the staff to clean the plastic in the first pouring hole 12 and the second pouring hole 22. After cleaning, the bottom of the feed section 1 is inserted into the top of the connecting section 2, and the fastening component 3 is used to fix the feed section 1 and the connecting section 2 on the mold body 4. This can reduce the operating steps for the staff to disassemble and assemble the gate sleeve, reduce the time for disassembling and assembling the gate sleeve, and at the same time ensure the overall structural strength and sealing of the gate sleeve, thereby improving the efficiency of injection molding.

[0036] Reference Figure 2 The fastening assembly 3 includes an insertion rod 31 inserted into the fastening hole 13, the top of the insertion rod 31 is processed to form a large head end 311, a rotating column 32 is inserted into the large head end 311, the top surface of the rotating column 32 is provided with a countersunk hole 33, the inner wall of the countersunk hole 33 is hexagonal, and the bottom of the rotating column 32 is integrally formed with a rotating rod 34, the rotating rod 34 is inserted and rotated in the insertion rod 31, a section at the bottom of the rotating rod 34 is processed to form an external thread, and a section at the bottom of the insertion rod 31 is processed to form a threaded section corresponding to the threaded section The rotating rod 34 is equipped with a matching internal thread. When the rotating rod 34 rotates, the rotating rod 34 can move up and down in the insertion rod 31. An anti-drop hole 35 is provided at the bottom of the insertion rod 31. Two anti-drop holes 35 are symmetrically provided along the diameter of the insertion rod 31. A steel ball 36 is slidably arranged in the anti-drop hole 35. The diameter of the hole of the anti-drop hole 35 located on the peripheral wall of the insertion rod 31 is smaller than the diameter of the steel ball 36, which can prevent the steel ball 36 from falling out of the anti-drop hole 35. The inner wall of the fixing hole 41 is provided with an annular groove 42 that matches the steel ball 36.

[0037] When using the injection mold gate sleeve, insert the insertion rod 31 into the fastening hole 13, insert the hex wrench into the countersunk hole 33 and rotate it. At this time, the rotating rod 34 rotates in the insertion rod 31 and moves along the insertion rod 31 toward the steel ball 36. As the rotating rod 34 moves, the steel ball 36 in the anti-drop hole 35 is pushed into the annular groove 42. By embedding the steel ball 36 into the annular groove 42, the feeding section 1 and the connecting section 2 can be fixed to the mold body 4. When disassembling the gate sleeve, the rotating rod 34 is moved up and down in the insertion rod 31 to control the steel ball 36 to embed into the annular groove 42, so as to realize the fixation of the fastening component 3 and the mold body 4. It can reduce the operating steps of the staff when disassembling the gate sleeve, and at the same time ensure the tight connection between the feeding section 1 and the connecting section 2 and the mold body 4.

[0038] Reference Figure 2 The bottom of the plug rod 31 is processed to form a spherical end 312. When the injection mold gate sleeve is used, the spherical end 312 of the plug rod 31 is convenient for the staff to insert the plug rod 31 into the fastening hole 13, and is convenient for the plug rod 31 to be inserted into the fixing groove.

[0039] Reference Figure 2 , the bottom of the feeding section 1 is processed into a conical shape with an arc-shaped peripheral wall, and the inner wall of the assembly hole 211 is processed into an arc shape that matches the bottom of the feeding section 1. When using this injection mold nozzle sleeve, the conical section at the bottom of the feeding section 1 facilitates the connection between the feeding section 1 and the connecting section 2 by the staff, and at the same time can increase the sealing performance at the connection between the feeding section 1 and the connecting section 2, ensuring the stability and reliability during the injection molding work of the nozzle sleeve.

[0040] Reference Figure 2 , a first sealing ring groove 212 is provided on the inner wall of a section of the assembly hole 211 close to the second pouring hole 22, and a second sealing ring groove 14 is provided at the bottom of the feeding section 1. The notch of the second sealing ring groove 14 is opposite to that of the first sealing ring groove 212, and a sealing gasket 5 is jointly embedded in the first sealing ring groove 212 and the second sealing ring groove 14. When using this injection mold nozzle sleeve, the sealing gasket 5 can increase the sealing performance at the connection between the feeding section 1 and the connecting section 2, ensuring the stability and reliability during the injection molding work of the nozzle sleeve.

[0041] Reference Figure 2 , the hole diameter of the second pouring hole 22 close to the assembly hole 211 is smaller than the diameter of the inner wall of the second pouring hole 22. When using this injection mold nozzle sleeve, the hole diameter at one end of the second pouring hole 22 is smaller than the diameter of the inner wall of the second pouring hole 22, which facilitates the separation of the cooled plastic from the second pouring hole 22.

[0042] Reference Figure 2 and Figure 3 , a positioning block 6 is connected to the peripheral wall of the top of the feeding section 1. There are four positioning blocks 6 which are arranged at intervals along the peripheral wall of the top of the feeding section 1. The two sides of the positioning block 6 in the length direction are processed into arc surfaces, and one side arc surface is attached to the peripheral wall of the top of the feeding section 1. A positioning rod 61 is welded to the side of the positioning block 6 attached to the feeding section 1, and the positioning rod 61 is inserted into the feeding section 1. The top surface of the mold body 4 is processed into positioning grooves 43 that match the positioning blocks 6. There are four positioning grooves 43 which correspond to the positioning blocks 6 one by one.

[0043] When using this injection mold nozzle sleeve, insert the positioning rod 61 into the feeding section 1 and make the positioning block 6 fit with the feeding section 1. When placing the feeding section 1 on the mold body 4, the positioning block 6 is embedded in the positioning groove 43 to limit the feeding section 1, ensuring that the pressure of the injection molding machine during the injection molding work will not cause the nozzle sleeve to move, and ensuring the stability during the injection molding work of the nozzle sleeve.

[0044] Reference Figure 3, a first annular groove 15 is formed in the peripheral wall at the top of the feeding section 1, a second annular groove 213 is formed in the peripheral wall of the assembly section 21, a clamping strip 62 is welded to the side of the positioning block 6 where the positioning rod 61 is provided, two clamping strips 62 are provided and are respectively located at the top and bottom of the positioning block 6. When the feeding section 1 is connected to the communication section 2, the two clamping strips 62 can be respectively inserted into the first annular groove 15 and the second annular groove 213.

[0045] When using the sprue bushing of this injection mold, the two clamping strips 62 on the positioning block 6 are respectively inserted into the first annular groove 15 and the second annular groove 213, which can limit the feeding section 1 and the assembly section 21, ensure the tightness of the connection between the feeding section 1 and the communication section 2, and ensure the stability and reliability of the sprue bushing during the injection molding work.

[0046] This specific embodiment is only an explanation of the present application, and it does not limit the present application. Those skilled in the art can make modifications without creative contributions to this embodiment according to needs after reading this specification, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

Claims

1. Injection mold sprue bushing, characterized in that: The sprue bushing includes a feed section (1). A diffusion hole (11) is formed in the feed section (1). A first pouring hole (12) is formed at the bottom of the diffusion hole (11). One end of the first pouring hole (12) communicates with the bottom of the feed section (1). A connecting section (2) is sleeved at the bottom of the feed section (1). An assembly section (21) matching with the feed section (1) is formed at the top of the connecting section (2). An assembly hole (211) is formed in the assembly section (21). A second pouring hole (22) communicates with the bottom of the assembly hole (211). One end of the second pouring hole (22) communicates with the bottom of the connecting section (2). A fastening hole (13) is formed at the top of the feed section (1). A fastening component (3) is inserted into the fastening hole (13). The injection mold includes a mold body (4). The mold body (4) abuts against the assembly section (21). A fixing hole (41) corresponding to the fastening hole (13) is formed in the mold body (4). The fastening component (3) can be inserted into and clamped in the fixing hole (41).

2. The gate bushing of the injection mold according to claim 1, characterized in that: The fastening component (3) includes a plug rod (31) inserted into the fastening hole (13). A big head end (311) is formed at one end of the plug rod (31). A rotating column (32) is inserted into the big head end (311). A counterbore (33) with a hexagonal inner wall is formed in the rotating column (32). A rotating rod (34) is integrally formed at the bottom of the rotating column (32). The rotating rod (34) is inserted into the plug rod (31), and a section of the rotating rod (34) is threadedly connected with the inner wall of the plug rod (31). An anti - detachment hole (35) is formed at the bottom of the plug rod (31). A steel ball (36) is slidably arranged in the anti - detachment hole (35). The diameter of the orifice of the anti - detachment hole (35) is smaller than the diameter of the steel ball (36).

3. The gate bushing of the injection mold according to claim 2, characterized in that: A spherical end (312) is formed at the bottom of the plug rod (31).

4. The gate bushing of the injection mold according to claim 3, characterized in that: The bottom of the feed section (1) is formed in a conical shape with an arc - shaped peripheral wall. The inner wall of the assembly hole (211) is formed in an arc shape matching with the bottom of the feed section (1).

5. The gate bushing of the injection mold according to claim 4, characterized in that: A first sealing ring groove (212) is formed in the inner wall of the assembly hole (211). A second sealing ring groove (14) is formed at the bottom of the feed section (1). The orifices of the first sealing ring groove (212) and the second sealing ring groove (14) are opposite to each other. A sealing washer (5) is jointly embedded in the first sealing ring groove (212) and the second sealing ring groove (14).

6. The gate bushing of the injection mold according to claim 1, characterized in that: The diameter of the orifice at one end of the second pouring hole (22) is smaller than the diameter of the inner wall of the second pouring hole (22).

7. The gate bushing of the injection mold according to claim 6, wherein: A positioning block (6) is arranged on the peripheral wall of the feed section (1). A positioning rod (61) is fixedly connected to the positioning block (6). The positioning rod (61) can be inserted into the feed section (1). A positioning groove (43) matching with the positioning block (6) is formed in the mold body (4).

8. The gate bushing of the injection mold according to claim 7, characterized in that: The peripheral wall of the feeding section (1) is provided with a first annular groove (15), the peripheral wall of the assembly section (21) is provided with a second annular groove (213), a clamping strip (62) is fixedly connected to the positioning block (6), at least two clamping strips (62) are provided, and when the feeding section (1) is connected to the communication section (2), the two clamping strips (62) can be respectively embedded into the first annular groove (15) and the second annular groove (213).

Images