Twisted tooth structure of injection mold and injection mold

Abstract

The utility model belongs to injection mold technical field, specifically discloses a kind of screw thread structure and injection mold of injection mold, the utility model provides the screw thread structure of injection mold, when the one end of positioning piece is resisted to spiral groove, driving part stops working, screw thread insert realizes tooth, when the other end of positioning piece is resisted to spiral groove, driving part stops working, screw thread insert enters the injection cavity of injection mold, positioning piece and spiral groove cooperate and realize the rotational positioning of driving part, the number of turns of driving part rotation can be accurately controlled by setting the length of spiral groove, and then the number of turns of screw thread insert rotation is accurately controlled, so that screw thread insert will not damage the internal thread of product when tooth, or guarantee the position accuracy of screw thread insert in injection cavity;In addition, spiral groove extends along the axial direction of positioning shaft, and positioning piece cooperates with spiral groove to realize positioning, which does not occupy space and is suitable for small injection mold.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to a threaded structure for an injection mold and an injection mold. Background Technology

[0002] When injection molds process and mold products with internal threads, threaded inserts are usually required. External threads are made on the threaded inserts, and the threaded portion of the insert is placed inside the injection cavity to facilitate the molding of the product's internal threads. During mold opening, a drive unit and transmission structure drive the threaded insert to rotate and move, causing the insert to unscrew from the product.

[0003] In the existing technology, the threaded structure of the injection mold is driven by a hydraulic motor to control the rotation and movement of the threaded insert. When the hydraulic motor stops, it has inertia, which makes it impossible to accurately control the number of rotations of the threaded insert, thus damaging the internal threads of the product. Utility Model Content

[0004] The purpose of this utility model is to provide a threaded structure for injection molds and an injection mold, which solves the problem that the drive component has inertia when it stops, which makes it impossible to accurately control the number of rotations of the threaded insert, thus damaging the internal threads of the product.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] In a first aspect, a threaded structure for an injection mold is provided, comprising:

[0007] Drive components;

[0008] A positioning shaft, one end of which is connected to the driving component, is provided with a helical groove, which is arranged around the circumference of the positioning shaft and extends along the axial direction of the positioning shaft;

[0009] A transmission assembly, one end of which is fixed to the other end of the positioning shaft, and the other end of which is connected to a threaded insert;

[0010] The positioning assembly includes a positioning seat and a positioning element. One end of the positioning element slides and engages with the positioning seat along the axial direction of the positioning shaft, and the other end of the positioning element is placed in the spiral groove. The driving element is used to drive the positioning shaft to rotate. The rotation of the positioning shaft causes the positioning element to slide and causes the transmission assembly to drive the threaded insert to move. When the positioning element abuts against the end of the spiral groove, the driving element stops working, and the threaded insert disengages or enters the injection cavity of the injection mold.

[0011] As an optional technical solution for the spiral groove structure of the above-mentioned injection mold, the positioning component includes a positioning block and a positioning pin. One end of the positioning block is slidably connected to the positioning seat, one end of the positioning pin is connected to the other end of the positioning block, and the other end of the positioning pin is placed in the spiral groove.

[0012] As an optional technical solution for the reamer structure of the above-mentioned injection mold, multiple positioning pins are provided, and the multiple positioning pins are spaced apart along the axial direction of the positioning shaft.

[0013] As an optional technical solution for the aforementioned reamer structure of the injection mold, the positioning seat is provided with a sliding groove, the sliding groove includes a first groove and a second groove communicating with the first groove, the width of the first groove is greater than the width of the second groove, the positioning block includes a first slider and a second slider connected to the first slider, the first slider is slidably disposed in the first groove, the second slider is slidably disposed in the second groove, and the positioning pin is provided on the side of the second slider away from the first slider, the positioning pin protruding from the second groove.

[0014] As an optional technical solution for the aforementioned reamer structure of the injection mold, the positioning seat is provided with an installation cavity, the driving component is disposed outside the installation cavity and fixedly connected to the positioning seat, the positioning shaft is placed inside the installation cavity, the driving end of the driving component passes through the positioning seat and is connected to one end of the positioning shaft, and the positioning component is slidably connected to the cavity wall of the installation cavity.

[0015] As an optional technical solution for the threaded structure of the above-mentioned injection mold, the transmission component is a gear transmission component, which includes an input gear, an intermediate transmission wheel set and an output gear. The input gear and the output gear are respectively meshed with the intermediate transmission wheel set. The input gear is fixed to the other end of the positioning shaft. The output gear is connected to the threaded insert. The input gear is located on the side of the positioning seat away from the driving member.

[0016] As an optional technical solution for the aforementioned injection mold threaded structure, a protective plate is connected to the side of the positioning seat away from the driving member. The protective plate is recessed with a receiving groove on the side facing the positioning seat. One side wall of the receiving groove is open. The input gear is placed in the receiving groove and is rotatably connected to the bottom of the receiving groove.

[0017] As an optional technical solution for the aforementioned auger structure of the injection mold, the positioning shaft and the input gear are integrally connected.

[0018] As an optional technical solution for the aforementioned threaded structure of the injection mold, the driving component is a hydraulic motor.

[0019] Secondly, an injection mold is provided, including a stationary mold and the aforementioned threaded structure of the injection mold, wherein the stationary mold is provided with an injection cavity, and the threaded insert of the threaded structure can be placed in the injection cavity or removed.

[0020] The beneficial effects of this utility model are:

[0021] The threaded structure of the injection mold provided by this utility model has a positioning shaft between the transmission component and the driving component. The positioning shaft has a helical groove. The driving component drives the positioning shaft to rotate, and the rotation of the positioning shaft causes the positioning component to slide and the transmission component to drive the threaded insert to move. When the positioning component abuts against one end of the helical groove, the driving component stops working, and the threaded insert is disengaged. When the positioning component abuts against the other end of the helical groove, the driving component stops working, and the threaded insert enters the injection cavity of the injection mold. The positioning component and the helical groove cooperate to achieve rotational positioning of the driving component. By setting the length of the helical groove, the number of rotations of the driving component can be precisely controlled, thereby precisely controlling the number of rotations of the threaded insert, so that the threaded insert will not damage the internal thread of the product when disengaging, or ensure the positional accuracy of the threaded insert in the injection cavity. In addition, the helical groove extends along the axial direction of the positioning shaft, and the positioning component cooperates with the helical groove to achieve positioning. This structure does not occupy space and is suitable for use in small injection molds. Attached Figure Description

[0022] Figure 1 This is a partial structural schematic diagram of the spiral tooth structure of the injection mold provided in this embodiment of the utility model;

[0023] Figure 2 This is a structural schematic diagram of the positioning shaft, positioning component, driving component, and transmission assembly provided in this embodiment of the utility model;

[0024] Figure 3 This is a schematic diagram of the positioning component provided in an embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the driving component, positioning shaft, input gear and positioning seat provided in the embodiment of this utility model;

[0026] Figure 5 This is a schematic diagram of the positioning seat provided in an embodiment of the present utility model;

[0027] Figure 6 This is a schematic diagram of the structure of the protective plate provided in this embodiment of the utility model.

[0028] In the picture:

[0029] 1. Drive component; 2. Positioning shaft; 3. Transmission assembly; 4. Threaded insert; 5. Positioning assembly; 6. Protective plate;

[0030] 21. Spiral groove;

[0031] 31. Input gear; 32. Output gear; 33. Intermediate transmission gear set;

[0032] 51. Positioning seat; 511. Sliding groove; 5111. First groove; 5112. Second groove; 512. Mounting cavity; 52. Positioning component; 521. Positioning block; 5211. First slider; 5212. Second slider; 522. Positioning pin;

[0033] 61. Receiving tank. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0035] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0038] like Figure 1 and Figure 2 As shown, this embodiment provides a threaded structure for an injection mold, which includes a drive component 1, a positioning shaft 2, a transmission assembly 3, and a positioning assembly 5. One end of the positioning shaft 2 is connected to the drive component 1, and the positioning shaft 2 is provided with a spiral groove 21, which is arranged circumferentially around the positioning shaft 2 and extends axially along the positioning shaft 2. One end of the transmission assembly 3 is fixed to the other end of the positioning shaft 2, and the other end of the transmission assembly 3 is connected to a threaded insert 4. The positioning assembly 5 includes a positioning seat 51 and a positioning element 52. One end of the positioning element 52 slides and engages with the positioning seat 51 along the axial direction of the positioning shaft 2, and the other end of the positioning element 52 is placed in the spiral groove 21. The drive component 1 is used to drive the positioning shaft 2 to rotate. The rotation of the positioning shaft 2 causes the positioning element 52 to slide and causes the transmission assembly 3 to drive the threaded insert 4 to move. When the positioning element 52 abuts against the end of the spiral groove 21, the drive component 1 stops working, and the threaded insert 4 disengages or enters the injection cavity of the injection mold.

[0039] A positioning shaft 2 is provided between the transmission assembly 3 and the driving component 1. The positioning shaft 2 has a spiral groove 21. The driving component 1 drives the positioning shaft 2 to rotate. The rotation of the positioning shaft 2 causes the positioning component 52 to slide and causes the transmission assembly 3 to drive the threaded insert 4 to move. When the positioning component 52 abuts against one end of the spiral groove 21, the driving component 1 stops working, and the threaded insert 4 disengages. When the positioning component 52 abuts against the other end of the spiral groove 21, the driving component 1 stops working, and the threaded insert 4 enters the injection cavity of the injection mold. 2. The spiral groove 21 cooperates with the positioning shaft 2 to achieve rotational positioning of the driving component 1. By setting the length of the spiral groove 21, the number of rotations of the driving component 1 can be precisely controlled, thereby precisely controlling the number of rotations of the threaded insert 4. This ensures that the threaded insert 4 will not damage the internal thread of the product when it is disengaged, or ensures the positional accuracy of the threaded insert 4 in the injection cavity. In addition, the spiral groove 21 extends along the axial direction of the positioning shaft 2. The positioning component 52 cooperates with the spiral groove 21 to achieve positioning. This structure does not occupy space and is suitable for use in small injection molds.

[0040] In some embodiments, such as Figures 1 to 3 As shown, the positioning component 52 includes a positioning block 521 and a positioning pin 522. One end of the positioning block 521 is slidably connected to the positioning seat 51, and one end of the positioning pin 522 is connected to the other end of the positioning block 521. The other end of the positioning pin 522 is placed in the spiral groove 21. The rotation of the positioning shaft 2 can drive the positioning pin 522 to move along the extension direction of the spiral groove 21, thereby causing the positioning block 521 to slide relative to the positioning seat 51. This achieves both a stable connection between the positioning component 52 and the positioning seat 51, and a connection between the positioning component 52 and the spiral groove 21.

[0041] Optionally, multiple positioning pins 522 are provided, spaced apart along the axial direction of the positioning shaft 2. These pins are positioned within spiral grooves 21 at different heights, enabling multiple point connections between the positioning element 52 and the spiral grooves 21, thus improving the stability of the connection. Alternatively, two positioning pins 522 are provided, spaced apart by a spiral groove 21. When one positioning pin 522 abuts against one end of the spiral groove 21, the driving element 1 stops operating; when the other positioning pin 522 abuts against the other end of the spiral groove 21, the driving element 1 stops operating. The spacing between the two positioning pins 522, the length of the spiral groove 21, and the number of rotations of the driving element 1 are interconnected and can be set according to actual needs. Therefore, no specific limitations are made on the spacing between the positioning pins 522 and the length of the spiral groove 21.

[0042] Optionally, such as Figures 3 to 5 As shown, the positioning seat 51 is provided with a sliding groove 511, which includes a first groove 5111 and a second groove 5112 connected to the first groove 5111. The width of the first groove 5111 is greater than the width of the second groove 5112. The positioning block 521 includes a first slider 5211 and a second slider 5212 connected to the first slider 5211. The first slider 5211 is slidably disposed in the first groove 5111, and the second slider 5212 is slidably disposed in the second groove 5112. A positioning pin 522 is provided on the side of the second slider 5212 opposite to the first slider 5211, and the positioning pin 522 protrudes from the second groove 5112. The structure of the sliding groove 511 ensures that the positioning block 521 does not detach from the sliding groove 511, and the positioning block 521 can only slide along the direction of extension of the sliding groove 511. The positioning pin 522 protruding from the second groove 5112 does not affect the engagement and connection between the positioning pin 522 and the spiral groove 21. The shape of the first slider 5211 is adapted to the shape of the first groove 5111, and the shape of the second slider 5212 is adapted to the shape of the second groove 5112.

[0043] In some other feasible embodiments, the positioning base 51 is provided with a slide rail, and the positioning block 521 is slidably connected to the slide rail.

[0044] In some embodiments, the positioning seat 51 has a mounting cavity 512, the driving member 1 is disposed outside the mounting cavity 512 and fixedly connected to the positioning seat 51, the positioning shaft 2 is placed inside the mounting cavity 512, the driving end of the driving member 1 passes through the positioning seat 51 and is connected to one end of the positioning shaft 2, and the positioning member 52 is slidably connected to the cavity wall of the mounting cavity 512. Specifically, the cavity wall of the mounting cavity 512 is provided with a sliding groove 511, and the positioning member 52 is slidably connected to the sliding groove 511. By placing the positioning shaft 2 and the positioning member 52 inside the mounting cavity 512, the positioning shaft 2 and the positioning member 52 are protected from damage, improving the safety of the injection mold and the structural compactness of the threaded joint structure.

[0045] Combination Figure 1 , Figure 2 and Figure 6 As shown, transmission component 3 is a gear transmission component, which includes an input gear 31, an intermediate transmission gear set 33, and an output gear 32. The input gear 31 and output gear 32 mesh with the intermediate transmission gear set 33, respectively. The input gear 31 is fixed to the other end of the positioning shaft 2, and the output gear 32 is connected to the threaded insert 4. The input gear 31 is positioned on the side of the positioning seat 51 opposite to the driving component 1. Transmission component 3 is a gear transmission component, providing good transmission stability. The input gear 31 is positioned outside the mounting cavity 512 for easy meshing with the intermediate transmission gear set 33. The number of gears and the transmission method of the intermediate transmission gear set 33 can be set according to actual needs and are not specifically limited here. The connection structure between the output gear 32 and the threaded insert 4 is not specifically limited here.

[0046] Optionally, a protective plate 6 is connected to the side of the positioning seat 51 opposite to the driving component 1. A receiving groove 61 is recessed on the side of the protective plate 6 facing the positioning seat 51. One side wall of the receiving groove 61 is open, and the input gear 31 is placed inside the receiving groove 61, rotatably connected to the bottom of the groove. This prevents the positioning shaft 2 and the input gear 31 from shaking when rotating, thus avoiding interference with the normal transmission of the transmission component 3. Placing the input gear 31 inside the receiving groove 61 protects the input gear 31 and improves the safety of the injection mold. The opening on one side wall of the receiving groove 61 allows part of the input gear 31 to extend out of the opening, or a portion of the gear meshing with the input gear 31 to extend into the opening, facilitating meshing between the input gear 31 and other gears.

[0047] In some embodiments, the positioning shaft 2 and the input gear 31 are integrally connected, eliminating the need for subsequent assembly of the input gear 31 and the positioning shaft 2, thus simplifying the assembly process.

[0048] In some embodiments, the drive element 1 is a hydraulic motor, which has the characteristics of low inertia, high torque, precise speed regulation, fast response, and high reliability. In other embodiments, the drive element 1 is a servo motor or a stepper motor, which is not specifically limited here.

[0049] This embodiment also provides an injection mold, which includes a stationary mold and the aforementioned threaded structure for injection molds. The stationary mold has an injection cavity, and the threaded insert 4 of the threaded structure can be placed in the injection cavity or disengaged. The structure of the stationary mold is prior art and will not be described in detail here. The injection mold also includes other structures, which are all prior art and will not be described in detail here.

[0050] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A threaded structure for an injection mold, characterized in that, include: Drive component (1); A positioning shaft (2) is provided, one end of which is connected to the driving member (1). The positioning shaft (2) is provided with a spiral groove (21), which is arranged around the circumference of the positioning shaft (2) and extends along the axial direction of the positioning shaft (2). Transmission assembly (3), one end of which is fixed to the other end of the positioning shaft (2), and the other end of which is connected to a threaded insert (4); The positioning component (5) includes a positioning seat (51) and a positioning element (52). One end of the positioning element (52) slides and engages with the positioning seat (51) along the axial direction of the positioning shaft (2). The other end of the positioning element (52) is placed in the spiral groove (21). The driving element (1) is used to drive the positioning shaft (2) to rotate. The rotation of the positioning shaft (2) causes the positioning element (52) to slide and causes the transmission component (3) to drive the threaded insert (4) to move. The positioning element (52) abuts against the end of the spiral groove (21). The driving element (1) stops working, and the threaded insert (4) disengages or enters the injection cavity of the injection mold.

2. The threaded structure of the injection mold according to claim 1, characterized in that, The positioning component (52) includes a positioning block (521) and a positioning pin (522). One end of the positioning block (521) is slidably connected to the positioning seat (51), and one end of the positioning pin (522) is connected to the other end of the positioning block (521). The other end of the positioning pin (522) is placed in the spiral groove (21).

3. The threaded structure of the injection mold according to claim 2, characterized in that, Multiple positioning pins (522) are provided, and the multiple positioning pins (522) are spaced apart along the axial direction of the positioning shaft (2).

4. The threaded structure of the injection mold according to claim 2, characterized in that, The positioning seat (51) is provided with a sliding groove (511), the sliding groove (511) includes a first groove body (5111) and a second groove body (5112) communicating with the first groove body (5111). The width of the first groove body (5111) is greater than the width of the second groove body (5112). The positioning block (521) includes a first slider (5211) and a second slider (5212) connected to the first slider (5211). The first slider (5211) is slidably disposed in the first groove body (5111), and the second slider (5212) is slidably disposed in the second groove body (5112). The positioning pin (522) is provided on the side of the second slider (5212) away from the first slider (5211), and the positioning pin (522) protrudes out of the second groove body (5112).

5. The threaded structure of the injection mold according to claim 1, characterized in that, The positioning seat (51) is provided with a mounting cavity (512). The driving member (1) is disposed outside the mounting cavity (512) and fixedly connected to the positioning seat (51). The positioning shaft (2) is placed inside the mounting cavity (512). The driving end of the driving member (1) passes through the positioning seat (51) and is connected to one end of the positioning shaft (2). The positioning member (52) is slidably connected to the cavity wall of the mounting cavity (512).

6. The threaded structure of the injection mold according to claim 5, characterized in that, The transmission assembly (3) is a gear transmission assembly, which includes an input gear (31), an intermediate transmission gear set (33), and an output gear (32). The input gear (31) and the output gear (32) are respectively meshed with the intermediate transmission gear set (33). The input gear (31) is fixed to the other end of the positioning shaft (2). The output gear (32) is connected to the threaded insert (4). The input gear (31) is placed on the side of the positioning seat (51) away from the driving member (1).

7. The threaded structure of the injection mold according to claim 6, characterized in that, The positioning seat (51) is connected to a protective plate (6) on the side away from the driving member (1). The protective plate (6) is recessed with a receiving groove (61) on the side facing the positioning seat (51). One side wall of the receiving groove (61) is open. The input gear (31) is placed in the receiving groove (61) and is rotatably connected to the bottom of the receiving groove (61).

8. The threaded structure of the injection mold according to claim 6, characterized in that, The positioning shaft (2) and the input gear (31) are integrally connected.

9. The threaded structure of the injection mold according to claim 1, characterized in that, The driving component (1) is a hydraulic motor.

10. An injection mold, characterized in that, The mold includes a stationary mold and a threaded structure for an injection mold according to any one of claims 1-9, wherein the stationary mold is provided with an injection cavity, and the threaded insert (4) of the threaded structure can be placed in the injection cavity or removed.

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