Threaded plastic part forming mold capable of achieving accurate limiting
By introducing a combination of a drive unit and a limit unit into the injection mold, precise control of the molding sleeve is achieved, the problem of high-precision molding of the threaded part of the injection mold is solved, and the quality of the plastic part is improved.
Patent Information
- Application Number
- CN202422950621.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-12-02
AI Technical Summary
Existing injection molds are difficult to meet the high-precision molding requirements of the threaded parts of plastic parts and cannot accurately control the position of the movable mold, resulting in poor quality of the injection molded parts.
The thread sleeve movable die assembly including the driving unit, the bearing shaft, the forming sleeve and the limit unit is adopted. Through the transmission cooperation of the driving motor and the reducer, combined with the limit bolt, the elastic sleeve and the limit switch, the moving distance of the forming sleeve is accurately controlled to ensure the high-precision forming of the thread.
The molding accuracy of the threaded part of the injection mold is improved, the accurate positioning and high-precision molding of the plastic part thread are ensured, and the problem of insufficient accuracy existing in the prior art is solved.
Smart Images
Figure CN223407360U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection molds, and in particular to a precisely limited threaded plastic part molding mold. Background Art
[0002] In the field of injection molding, some injection molded parts require threads to be formed through injection molding. Generally, the threads can be injection molded by setting a movable mold. However, some plastic parts require more accurate position and length of the molded threads. However, the existing injection molds have relatively rough control over dimensional accuracy and cannot meet the requirements of high-precision injection molding. Therefore, it is necessary to more accurately control the position of the movable mold to improve the quality of the injection molded parts. Therefore, a new injection mold is needed to solve the above problems. Utility Model Content
[0003] The utility model provides a precisely limited thread plastic part molding die, which solves the problem in the prior art that injection molds are difficult to meet the high-precision molding requirements for the threaded portion of the plastic part.
[0004] The technical solution of the utility model is as follows:
[0005] A precisely limited threaded plastic part forming mold, the threaded plastic part forming mold comprising a lower mold assembly, an upper mold assembly and a movable mold assembly, the movable mold assembly comprising a through-hole movable mold assembly and a threaded sleeve movable mold assembly, the threaded sleeve movable mold assembly comprising a driving unit, a bearing shaft, a molding sleeve and a limiting unit, wherein the molding sleeve is arranged on the bearing shaft and can move along the axial direction of the bearing shaft, one end of the molding sleeve is a movable mold thread segment, and the other end is a movable thread segment, the driving unit cooperates with the movable thread segment to drive the molding sleeve to move, the limiting unit is arranged on the driving unit and is used to position the distance of movement of the molding sleeve in the direction of movement of the molding sleeve, the through-hole movable mold assembly, the movable mold thread segment, the upper mold assembly and the lower mold assembly form an injection molding space.
[0006] The driving unit includes a driving motor and a reducer, the bearing shaft passes through the reducer, the forming sleeve is arranged on the bearing shaft and the forming sleeve forms a transmission fit with the reducer, the inner wall of the reducer is provided with a matching thread section, and the movable thread section cooperates with the matching thread section, the limiting unit includes a limiting bolt, an elastic sleeve and a limit switch, the limiting bolt is movably arranged on the inner wall of the reducer and can pass through the inner wall of the reducer, the elastic sleeve is arranged on the limiting bolt and is located between the nut of the limiting bolt and the inner wall of the reducer, the limiting bolt is in the direction of movement of the forming sleeve, the limit switch is arranged on the outer wall of the reducer and the limit switch is located in the movable direction of the limiting bolt.
[0007] The through-hole movable mold assembly includes a first telescopic oil cylinder and a forming rod. The forming rod is arranged on the telescopic end of the first telescopic oil cylinder, and one end of the forming rod close to the bearing shaft is plugged into the bearing shaft.
[0008] The threaded plastic part forming mold further includes a positioning oil cylinder and an ejection block. The ejection block is arranged on the telescopic end of the positioning oil cylinder, and the ejection block abuts against the driving unit.
[0009] The lower mold assembly includes a lower fixed plate and a lower mold unit, and the lower mold unit is arranged above the lower fixed plate.
[0010] The upper mold assembly includes an upper fixed plate, an upper mold unit and an injection port. The upper mold unit is arranged below the upper fixed plate. The injection port is arranged on the upper mold unit and is used to communicate with the injection molding space.
[0011] The working principle and beneficial effects of the utility model are as follows:
[0012] The utility model discloses a precisely limited threaded plastic part forming mold, wherein the upper mold assembly and the lower mold assembly can be closed, and the through-hole movable mold assembly and the threaded sleeve movable mold assembly form a movable mold assembly. After the upper mold assembly and the lower mold assembly are closed, the through-hole movable mold assembly and the threaded sleeve movable mold assembly move together to form an injection molding space. Specifically, the threaded sleeve movable mold assembly is driven by a driving unit to rotate a bearing shaft, and a molding sleeve is arranged on the bearing shaft. The rotation of the bearing shaft drives the molding sleeve to rotate. One end of the molding sleeve is a movable thread segment, and the movable thread segment cooperates with the driving unit. When the driving unit drives When the bearing sleeve rotates, the molding sleeve can move along the axial direction of the bearing shaft. The other end of the molding sleeve is the movable mold thread section, and the movable mold thread section is the movable mold that forms the threaded part of the plastic part. By arranging a limiting unit on the driving unit, and the limiting unit is located in the direction of the axial movement of the molding sleeve, the distance the molding sleeve moves can be known through the limiting unit, thereby improving the dimensional accuracy of the movement of the movable mold molding sleeve and improving the molding accuracy of the threaded part of the molded plastic part, thereby solving the problem that the injection mold in the prior art is difficult to meet the high-precision molding of the threaded part of the plastic part. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.
[0014] Figure 1 This is a schematic diagram of the structure of the utility model;
[0015] Figure 2 This is a schematic diagram of the internal structure of the utility model Figure 1 ;
[0016] Figure 3 This is a schematic diagram of the internal structure of the utility model Figure 2 ;
[0017] Figure 4 for Figure 3 A partial enlarged view of point A in the middle;
[0018] In the figure: 1. Lower mold assembly, 2. Upper mold assembly, 3. Through-hole movable mold assembly, 4. Threaded sleeve movable mold assembly, 5. Drive unit, 6. Load-bearing shaft, 7. Forming sleeve, 8. Limit unit, 9. Movable mold thread segment, 10. Moving thread segment, 11. Drive motor, 12. Reducer, 13. Matching thread segment, 14. Limit bolt, 15. Elastic sleeve, 16. Limit switch, 17. First telescopic cylinder, 18. Forming rod, 19. Positioning cylinder, 20. Ejector block, 21. Lower fixed plate, 22. Lower mold unit, 23. Upper fixed plate, 24. Upper mold unit, 25. Injection port. DETAILED DESCRIPTION
[0019] The following will be combined with 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.
[0020] like Figures 1 to 4 As shown, this embodiment proposes a threaded plastic part molding mold with accurate positioning, the threaded plastic part molding mold includes a lower mold assembly 1, an upper mold assembly 2 and a movable mold assembly, the movable mold assembly includes a through-hole movable mold assembly 3 and a threaded sleeve movable mold assembly 4, the threaded sleeve movable mold assembly 4 includes a driving unit 5, a bearing shaft 6, a molding sleeve 7 and a limiting unit 8, wherein the molding sleeve 7 is sleeved on the bearing shaft 6 and can move along the axial direction of the bearing shaft 6, one end of the molding sleeve 7 is a movable mold thread segment 9, and the other end is a movable thread segment 10, the driving unit 5 cooperates with the movable thread segment 10 to drive the molding sleeve 7 to move, the limiting unit 8 is arranged on the driving unit 5 and in the direction of movement of the molding sleeve 7 to position the moving distance of the molding sleeve 7, the through-hole movable mold assembly 3, the movable mold thread segment 9, the upper mold assembly 2 and the lower mold assembly 1 form an injection molding space.
[0021] In this embodiment, a precisely limited threaded plastic part molding mold is disclosed. The upper mold assembly 2 and the lower mold assembly 1 can be molded together. The through-hole movable mold assembly 3 and the threaded sleeve movable mold assembly 4 constitute a movable mold assembly. After the upper mold assembly 2 and the lower mold assembly 1 are molded together, the through-hole movable mold assembly 3 and the threaded sleeve movable mold assembly 4 are moved together to form an injection molding space. Specifically, the threaded sleeve movable mold assembly 4 is driven by the driving unit 5 to rotate the bearing shaft 6. The molding sleeve 7 is sleeved on the bearing shaft 6. The bearing shaft 6 rotates to drive the molding sleeve 7 to rotate. One end of the molding sleeve 7 is a movable thread segment 10. The movable thread segment 10 cooperates with the driving unit 5. When the driving unit 5 is driven, the through-hole movable mold assembly 3 and the threaded sleeve movable mold assembly 4 are moved together to form an injection molding space. Specifically, the threaded sleeve movable mold assembly 4 is driven by the driving unit 5 to rotate the bearing shaft 6. The molding sleeve 7 is sleeved on the bearing shaft 6. The bearing shaft 6 rotates to drive the molding sleeve 7 to rotate. One end of the molding sleeve 7 is a movable thread segment 10. The movable thread segment 10 cooperates with the driving unit 5. When the unit 5 drives the bearing sleeve to rotate, the molding sleeve 7 can move along the axial direction of the bearing shaft 6. The other end of the molding sleeve 7 is the movable mold thread segment 9. The movable mold thread segment 9 is the movable mold for forming the threaded part of the plastic part. By arranging a limiting unit 8 on the driving unit 5, and at the same time the limiting unit 8 is located in the direction of the axial movement of the molding sleeve 7, the distance the molding sleeve 7 moves can be known through the limiting unit 8, thereby improving the dimensional accuracy of the movement of the movable mold molding sleeve 7, and improving the molding accuracy of the threaded part of the molded plastic part, thereby solving the problem that the injection mold in the prior art is difficult to meet the high-precision molding of the threaded part of the plastic part.
[0022] The driving unit 5 includes a driving motor 11 and a reducer 12, the bearing shaft 6 passes through the reducer 12, the forming sleeve 7 is sleeved on the bearing shaft 6 and the forming sleeve 7 forms a transmission fit with the reducer 12, the inner wall of the reducer 12 is provided with a matching thread section 13, the movable thread section 10 cooperates with the matching thread section 13, the limiting unit 8 includes a limiting bolt 14, an elastic sleeve 15 and a limit switch 16, the limiting bolt 14 is movably provided on the inner wall of the reducer 12 and can pass through the inner wall of the reducer 12, the elastic sleeve 15 is sleeved on the limiting bolt 14 and is located between the nut of the limiting bolt 14 and the inner wall of the reducer 12, the limiting bolt 14 is in the direction of movement of the forming sleeve 7, the limit switch 16 is provided on the outer wall of the reducer 12 and the limit switch 16 is located in the movable direction of the limiting bolt 14.
[0023] In this embodiment, the driving unit 5 is a driving motor 11 combined with a reducer 12. The driving motor 11 drives the reducer 12 to move and reduce the speed. The load-bearing shaft 6 passes through the reducer 12. A forming sleeve 7 is provided on the load-bearing shaft 6. The forming sleeve 7 forms a transmission match with the gear in the reducer 12. When the forming sleeve 7 rotates, the moving thread segment 10 at one end of the forming sleeve 7 will rotate relative to the matching thread segment 13 on the inner wall of the reducer 12, and then the forming sleeve 7 will move along the axial direction of the load-bearing shaft 6. In order to further improve the accuracy of the position, the limiting unit 8 is specifically A limit bolt 14, an elastic sleeve 15 and a limit switch 16 are used. The limit bolt 14 is set in a hole on the inner wall of the reducer 12 and can move along its hole. The elastic sleeve 15 is set on the limit bolt 14. After the forming sleeve 7 moves into place, it will abut against the limit bolt 14 and trigger the limit switch 16 located in its axial direction, so as to judge that it has moved into place. This position is the initial position of the forming sleeve 7. When forming is required, the motor 11 drives it to move a certain distance from this position, so that the forming sleeve 7 can reach the specified position, thereby improving the accuracy of forming.
[0024] The through-hole movable mold assembly 3 includes a first telescopic oil cylinder 17 and a forming rod 18 . The forming rod 18 is arranged on the telescopic end of the first telescopic oil cylinder 17 , and one end of the forming rod 18 close to the bearing shaft 6 is plugged into the bearing shaft 6 .
[0025] On the basis of the above embodiment, the first telescopic cylinder 17 and the molding rod 18 constitute a through-hole movable mold assembly 3. The molding rod 18 is arranged at the telescopic end of the first telescopic cylinder 17. The molding rod 18 forms a hole channel structure of the plastic part. When molding is required, the first telescopic cylinder 17 drives the molding rod 18 to be inserted into the injection molding space. When demolding is required, the first telescopic cylinder 17 is recovered and the molding rod 18 is withdrawn.
[0026] The threaded plastic part forming mold further includes a positioning oil cylinder 19 and an ejection block 20 . The ejection block 20 is disposed on the telescopic end of the positioning oil cylinder 19 , and the ejection block 20 abuts against the driving unit 5 .
[0027] In this embodiment, the ejection block 20 is driven by the positioning oil cylinder 19 to press the driving unit 5 against the lower mold assembly 1 and the upper mold assembly 2 so as to form a sealed injection molding space.
[0028] The lower mold assembly 1 includes a lower fixing plate 21 and a lower mold unit 22 . The lower mold unit 22 is disposed above the lower fixing plate 21 .
[0029] The upper mold assembly 2 includes an upper fixed plate 23 , an upper mold unit 24 and an injection port 25 . The upper mold unit 24 is disposed below the upper fixed plate 23 . The injection port 25 is disposed on the upper mold unit 24 and is used to communicate with the injection molding space.
[0030] In this embodiment, the lower mold assembly 1 is a lower mold unit 22 installed on the lower top plate, and the upper mold assembly 2 is a upper mold unit 24 installed on the upper fixed plate 23. The lower mold unit 22 and the upper mold unit 24 form a combined mold. The upper mold assembly 2 also includes an injection port 25, and the molding material is injected into the injection molding space through the injection port 25.
[0031] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. 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 precisely limited threaded plastic part forming mold, characterized in that: The threaded plastic part molding die comprises a lower mold assembly (1), an upper mold assembly (2) and a movable mold assembly, the movable mold assembly comprises a through-hole movable mold assembly (3) and a threaded sleeve movable mold assembly (4), the threaded sleeve movable mold assembly (4) comprises a driving unit (5), a bearing shaft (6), a molding sleeve (7) and a limiting unit (8), wherein the molding sleeve (7) is sleeved on the bearing shaft (6) and can move along the axial direction of the bearing shaft (6), one end of the molding sleeve (7) is a movable mold thread segment (9), and the other end is a movable thread segment (10), the driving unit (5) cooperates with the movable thread segment (10) to drive the molding sleeve (7) to move, the limiting unit (8) is arranged on the driving unit (5) and is positioned in the direction of movement of the molding sleeve (7) to determine the distance the molding sleeve (7) moves, the through-hole movable mold assembly (3), the movable mold thread segment (9), the upper mold assembly (2) and the lower mold assembly (1) form an injection molding space.
2. The accurately limited thread plastic part forming mold according to claim 1, characterized in that: The driving unit (5) includes a driving motor (11) and a reducer (12), the bearing shaft (6) passes through the reducer (12), the forming sleeve (7) is sleeved on the bearing shaft (6), and the forming sleeve (7) and the reducer (12) form a transmission match, the inner wall of the reducer (12) is provided with a matching thread section (13), the moving thread section (10) cooperates with the matching thread section (13), the limiting unit (8) includes a limiting bolt (14), an elastic sleeve (15) and a limit switch (16), The limiting bolt (14) is movably arranged on the inner wall of the reducer (12) and can pass through the inner wall of the reducer (12); the elastic sleeve (15) is sleeved on the limiting bolt (14) and is located between the nut of the limiting bolt (14) and the inner wall of the reducer (12); the limiting bolt (14) is in the direction in which the forming sleeve (7) moves; the limit switch (16) is arranged on the outer wall of the reducer (12) and the limit switch (16) is located in the direction in which the limiting bolt (14) can move.
3. The accurately limited thread plastic part forming mold according to claim 1, characterized in that: The through-hole movable mold assembly (3) comprises a first telescopic oil cylinder (17) and a forming rod (18), wherein the forming rod (18) is arranged on the telescopic end of the first telescopic oil cylinder (17), and one end of the forming rod (18) close to the bearing shaft (6) is plugged into the bearing shaft (6).
4. The accurately limited threaded plastic part forming mold according to claim 2, characterized in that: The threaded plastic part forming mold further comprises a positioning oil cylinder (19) and an ejection block (20), wherein the ejection block (20) is arranged on the telescopic end of the positioning oil cylinder (19), and the ejection block (20) abuts against the driving unit (5).
5. The accurately limited thread plastic part forming mold according to claim 1, characterized in that: The lower mold assembly (1) comprises a lower fixed plate (21) and a lower mold unit (22), wherein the lower mold unit (22) is arranged above the lower fixed plate (21).
6. The accurately limited thread plastic part forming mold according to claim 1, characterized in that: The upper mold assembly (2) comprises an upper fixed plate (23), an upper mold unit (24) and an injection port (25); the upper mold unit (24) is arranged below the upper fixed plate (23); and the injection port (25) is arranged on the upper mold unit (24) and is used to communicate with the injection molding space.