Twisted tooth structure of injection mold and injection mold

Abstract

The utility model belongs to injection molding technical field, specifically discloses a kind of tooth structure of screwing and injection mold.The tooth structure of injection mold provided by the utility model, the ratio of the tooth number of screw thread gear and the tooth number of screw gear is equal to the ratio of the pitch of first thread and the pitch of second thread, the structure of gear transmission can enlarge the pitch of second thread on screw rod piece, the pitch of second thread and the pitch of first thread are multiple relationship, realize the tooth of withdrawing tooth while improving the service life of screw rod piece, and suitable for the processing of internal thread with relatively small pitch and relatively thin tooth;The tooth structure is not easy to damage the tail tooth of internal thread, and improves the yield rate;In addition, the tooth structure is small in size, and the volume of injection mold can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, and in particular to a toothed 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 inserts to facilitate the molding of the internal threads in the product. During mold opening, the threaded inserts are rotated and moved by a drive device and transmission structure, causing the threaded inserts to unscrew from the product.

[0003] In existing technologies, most threaded structures in injection molds use racks or springs to drive the movement of threaded inserts. For rack-driven threaded structures, the rack is usually quite long, resulting in a large injection mold size. Furthermore, when the internal threads being molded have many teeth and a small pitch, the components of the rack-driven structure are prone to damage and have a short service life. For spring-driven threaded structures, the tail of the internal thread is easily damaged, especially for internal threads with a small pitch and fine teeth. Utility Model Content

[0004] The purpose of this utility model is to provide a threaded structure for injection molds and an injection mold, which is suitable for processing internal threads with small pitch and fine teeth, is less likely to damage the tail tooth of the internal thread, improves the yield, and the components of the threaded structure are less likely to be damaged, and can effectively reduce the volume of the injection mold.

[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] Coilless tooth module;

[0008] A threaded insert, wherein the first end of the threaded insert is rotatably connected to the threaded module, and the first end of the threaded insert is connected to a threaded toothed gear, and the second end of the threaded insert is provided with a first thread;

[0009] A screw component, wherein a second thread is provided at the first end of the screw component, a screw gear is connected to the second end of the screw component, and the second end of the screw component is rotatably connected to the coilover module;

[0010] A drive assembly drives the screw to rotate via the screw gear and drives the threaded insert to rotate via the screw tooth gear. The rotation of the screw causes the threaded module to move along the axial direction of the screw, thereby driving the second end of the threaded insert away from the injection cavity of the stationary mold. The threaded insert rotates synchronously with the screw.

[0011] The ratio of the number of teeth of the screw gear to the number of teeth of the screw gear is equal to the ratio of the pitch of the first thread to the pitch of the second thread.

[0012] As an optional technical solution for the aforementioned swivel structure of the injection mold, the swivel structure further includes a swivel seat, which is disposed on the side of the stationary mold. The second thread of the screw is threadedly connected to the swivel seat, and the swivel module and the swivel seat are slidably connected along the axial direction of the screw.

[0013] The driving assembly includes a driving member, a first gear, and a first intermediate transmission wheel set. The first gear is connected to the driving member. The first gear and the screw gear respectively mesh with the first intermediate transmission wheel set. The width of the gear meshing with the screw gear in the first intermediate transmission wheel set is greater than the width of the screw gear. The screw gear is connected to the helical gear. The driving member drives the screw gear to rotate through the first gear and the first intermediate transmission wheel set, causing the coiled gear module to slide along the axial direction of the screw member. The rotation of the screw gear drives the helical gear to rotate.

[0014] As an optional technical solution for the aforementioned auger structure of the injection mold, the auger structure further includes a support base. The auger base, the driving component, the first gear, and the first intermediate transmission wheel set are all disposed on the support base. The surface of the first gear is provided with a limiting groove along the circumferential direction. The support base is provided with a limiting block. The limiting block is slidably connected to the limiting groove. The limiting block can abut against both ends of the limiting groove to limit the rotation angle of the first gear.

[0015] As an optional technical solution for the aforementioned retractable tooth structure of the injection mold, the retractable tooth structure further includes a fixing sleeve, which is fixedly connected to the retractable tooth seat. The fixing sleeve is provided with a threaded hole, and the fixing sleeve is sleeved on the first end of the screw member, and the second thread is screwed into the threaded hole.

[0016] As an optional technical solution for the aforementioned auger structure of the injection mold, the auger structure includes a plurality of the aforementioned screw components, each of which is provided with a screw gear;

[0017] The driving assembly includes a driving element, a driving wheel, a first gear, a second intermediate transmission wheel set, and a third intermediate transmission wheel set. The driving wheel is connected to the driving element. The first gear meshes with both the driving wheel and the second intermediate transmission wheel set. The second intermediate transmission wheel set is connected to a plurality of screw gears and to the third intermediate transmission wheel set. The third intermediate transmission wheel set is connected to the helical gears. The driving element drives the plurality of screw gears to rotate synchronously via the driving wheel, the first gear, and the second intermediate transmission wheel set. Simultaneously, the driving element drives the helical gears to rotate via the driving wheel, the first gear, the second intermediate transmission wheel set, and the third intermediate transmission wheel set.

[0018] As an optional technical solution for the aforementioned auger structure of the injection mold, the second thread of the screw is used to screw into the stationary mold, and the auger module is disposed on the side of the stationary mold away from the injection mold cavity;

[0019] The coilover module includes a first gear plate and a second gear plate connected to the first gear plate. The first gear plate and the second gear plate are fastened together to form a cavity that accommodates the first gear, the second intermediate transmission wheel set and the third intermediate transmission wheel set. The driving member and the drive wheel are disposed on the first gear plate.

[0020] As an optional technical solution for the swivel gear structure of the above-mentioned injection mold, the surface of the first gear is provided with a limiting groove along the circumferential direction, and a limiting block is provided on the first gear plate. The limiting block is slidably connected to the limiting groove, and the limiting block can abut against both ends of the limiting groove to limit the rotation angle of the first gear.

[0021] As an optional technical solution for the aforementioned auger structure of the injection mold, the auger structure further includes a fixing sleeve, which is connected to the stationary mold. The fixing sleeve has a threaded hole, and the fixing sleeve is fitted onto the first end of the screw member, with the second thread screwed into the threaded hole.

[0022] As an optional technical solution for the threaded structure of the above-mentioned injection mold, the threaded insert is provided in multiple parts, and each threaded insert is provided with a threaded tooth wheel, and two adjacent threaded tooth wheels are staggered along the axial direction of the threaded insert.

[0023] In a second aspect, 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 mold cavity, and the second end of the threaded insert of the threaded structure can be placed inside or away from the injection mold cavity.

[0024] The beneficial effects of this utility model are:

[0025] The threaded structure of the injection mold provided by this utility model has a driving component that drives the screw to rotate via a screw gear. The driving component also drives the threaded insert to rotate via a threaded gear. The rotation of the screw causes the threaded module to move axially along the screw, thereby moving the second end of the threaded insert away from the injection cavity of the stationary mold. The threaded insert rotates synchronously with the screw. After injection molding and cooling, the threaded structure retracts the threaded insert. The ratio of the number of teeth on the threaded gear to the number of teeth on the screw gear is equal to the ratio of the pitch of the first thread to the pitch of the second thread. This gear transmission structure allows for... The pitch of the second thread on the large screw is a multiple of the pitch of the first thread, which improves the service life of the screw while achieving thread unwinding, and is suitable for machining internal threads with small pitch and fine teeth. The rotation of the screw causes the threaded die to move along the axial direction of the screw, and while the second end of the threaded die insert gradually moves away from the injection cavity of the stationary mold, the threaded die insert rotates, achieving thread unwinding. However, this threaded die structure is less likely to damage the tail of the internal thread, thus improving the yield rate. In addition, this threaded die structure is small in size, which can reduce the size of the injection mold. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the spiral groove structure of the injection mold provided in Embodiment 1 of this utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the screw gear, screw gear and drive assembly provided in Embodiment 1 of this utility model;

[0028] Figure 3 This is a schematic diagram of the distribution structure of the toothed gears provided in Embodiment 1 of this utility model;

[0029] Figure 4 This is a schematic diagram of the cooperation structure between the drive component and the coilover module provided in Embodiment 1 of this utility model;

[0030] Figure 5 This is a schematic diagram of the structure of the first gear and the limiting block cooperating as provided in Embodiment 1 of this utility model;

[0031] Figure 6 This is a schematic diagram of the overall structure of the spiral groove structure of the injection mold provided in Embodiment 2 of this utility model;

[0032] Figure 7 This is a schematic diagram of the internal structure of the coiled tooth structure provided in Embodiment 2 of this utility model;

[0033] Figure 8 This is a top view of the screw gear, screw gear, and drive assembly provided in Embodiment 2 of this utility model;

[0034] Figure 9This is a first axle side view of the screw gear, screw gear, and drive assembly provided in Embodiment 2 of this utility model;

[0035] Figure 10 This is a second axonometric view of the screw gear, screw gear, and drive assembly provided in Embodiment 2 of this utility model.

[0036] In the picture:

[0037] 100. Static mold; 200. Upper fixing plate;

[0038] 1. Coilover module; 2. Thread insert; 3. Threaded gear; 4. Screw; 5. Screw gear; 6. Drive assembly; 7. Coilover seat; 8. Fixing sleeve; 9. Support base;

[0039] 11. First gear plate; 12. Second gear plate; 13. Clearance groove;

[0040] 21. First thread;

[0041] 41. Second thread; 42. Bearing component;

[0042] 61. Driving component; 62. First gear; 621. Limiting groove; 63. First intermediate transmission gear set; 64. Driving wheel; 65. Second intermediate transmission gear set; 651. Second transmission gear; 652. Third transmission gear; 66. Third intermediate transmission gear set; 661. Fourth transmission gear; 662. Fifth transmission gear; 67. Limiting block; 68. Transition transmission gear set;

[0043] 71. First side seat; 72. Second side seat; 73. Connecting seat. Detailed Implementation

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] Example 1

[0049] like Figure 1 and Figure 2 As shown, this embodiment provides a threaded structure for an injection mold, comprising a threaded module 1, a threaded insert 2, a screw rod 4, and a drive assembly 6. The first end of the threaded insert 2 is rotatably connected to the threaded module 1, and a threaded gear 3 is connected to the first end of the threaded insert 2. The second end of the threaded insert 2 has a first thread 21. The first end of the screw rod 4 has a second thread 41, and a screw gear 5 is connected to the second end of the screw rod 4. The second end of the screw rod 4 is rotatably connected to the threaded module 1. The drive assembly 6 drives the screw rod 4 to rotate via the screw gear 5 and drives the threaded insert 2 to rotate via the threaded gear 3. The rotation of the screw rod 4 causes the threaded module 1 to move axially along the screw rod 4, thereby moving the second end of the threaded insert 2 away from the injection mold cavity of the stationary mold 100. The threaded insert 2 and the screw rod 4 rotate synchronously. The ratio of the number of teeth of the screw gear 3 to the number of teeth of the screw gear 5 is equal to the ratio of the pitch of the first thread 21 to the pitch of the second thread 41.

[0050] The drive assembly 6 drives the screw 4 to rotate via the screw gear 5. The drive assembly 6 also drives the threaded insert 2 to rotate via the threaded gear 3. The rotation of the screw 4 causes the threaded module 1 to move axially along the screw 4, thereby moving the second end of the threaded insert 2 away from the injection mold cavity of the stationary mold 100. The threaded insert 2 rotates synchronously with the screw 4. After injection molding and cooling, the threaded structure unwinds the threaded insert 2. The ratio of the number of teeth on the threaded gear 3 to the number of teeth on the screw gear 5 is equal to the ratio of the pitch of the first thread 21 to the pitch of the second thread 41. This gear transmission structure amplifies the thread on the screw 4. The pitch of the second thread 41 is multiple of that of the first thread 21, which improves the service life of the screw 4 while achieving thread unwinding, and is suitable for processing internal threads with small pitch and fine teeth. The rotation of the screw 4 causes the threaded die 1 to move along the axial direction of the screw 4. While driving the second end of the threaded die insert 2 to gradually move away from the injection mold cavity of the stationary mold 100, the threaded die insert 2 rotates, achieving thread unwinding. However, this threaded die structure is less likely to damage the tail tooth of the internal thread, thus improving the yield. In addition, the threaded die structure is small in size, which can reduce the size of the injection mold.

[0051] The drive assembly 6 includes a drive member 61, a first gear 62, and a first intermediate transmission wheel set 63. The first gear 62 is connected to the drive member 61. The first gear 62 and the screw gear 5 are respectively meshed with the first intermediate transmission wheel set 63. The screw gear 5 is connected to the screw tooth gear 3. The drive member 61 drives the screw gear 5 to rotate through the first gear 62 and the first intermediate transmission wheel set 63. The rotation of the screw gear 5 drives the screw tooth gear 3 to rotate. At the same time as the screw member 4 rotates, the screw thread insert 2 rotates. In practical applications, the screw thread insert 2 and the threaded module 1 move simultaneously along the axial direction of the screw member 4. At the same time, the screw thread insert 2 rotates, realizing the unthreading of the screw thread insert 2, so that the product forms an internal thread. During the unthreading process, the internal thread is not easily damaged.

[0052] Optionally, the first intermediate transmission gear set 63 includes a first transmission gear, which meshes with a first gear 62 and a screw gear 5. The driving member 61 drives the screw gear 5 to rotate through the first gear 62 and the first transmission gear. The rotation of the screw gear 5 drives the screw member 4 and the threaded gear 3 to rotate. The rotation of the threaded gear 3 drives the threaded insert 2 to rotate. The transmission structure is simple and achieves simultaneous rotation of the screw member 4 and the threaded insert 2, resulting in a small threaded structure and thus reducing the size of the injection mold. In some other embodiments, the first intermediate transmission gear set 63 may include multiple transmission gears, which are not specifically limited here.

[0053] The drive assembly 6 also includes a transition transmission gear set 68, with the screw gear 5 and the helical gear 3 meshing with the transition transmission gear set 68 respectively. The transition transmission gear set 68 enables the transmission connection between the screw gear 5 and the helical gear 3.

[0054] Optionally, the transition transmission gear set 68 includes a transition transmission gear, which meshes with the screw gear 5 and the helical gear 3 respectively. Multiple transition transmission gears can be provided, and the specific number is set according to the number of helical gears 3. For example, every two helical gears 3 can mesh with the same transition transmission gear, and multiple transition transmission gears mesh with the screw gear 5 respectively.

[0055] The screw gear 5 is fixedly connected to the screw component 4. A bearing component 42 is provided at the second end of the screw component 4. The inner ring of the bearing component 42 is connected to the screw component 4, and the outer ring of the bearing component 42 is connected to the coilover module 1, thus achieving a rotatable connection between the screw component 4 and the coilover module 1. To ensure the stability of the rotatable connection between the coilover module 1 and the screw component 4, bearing components 42 are provided on both sides of the screw gear 5.

[0056] like Figure 3 As shown, multiple threaded inserts 2 are provided, which can be set according to the number of internal threaded holes in the product to be injection molded. Each threaded insert 2 is provided with a threaded gear 3. Since the spacing between the internal threaded holes in the product to be injection molded is relatively small, the spacing between two adjacent threaded inserts 2 is also relatively small. In order to avoid interference between the threaded gears 3 on two adjacent threaded inserts 2, the two adjacent threaded gears 3 are staggered along the axial direction of the threaded insert 2. The threaded gears 3 are relatively small in size, so multiple threaded gears 3 mesh with the screw gear 5 respectively, reducing the number of components.

[0057] See also Figures 1 to 3 As shown, the swivel joint structure also includes a swivel joint seat 7, which is disposed on the side of the stationary mold 100. The second thread 41 of the screw 4 is threadedly connected to the swivel joint seat 7. The swivel joint module 1 and the swivel joint seat 7 are slidably connected along the axial direction of the screw 4. The width of the gear meshing with the screw gear 5 in the first intermediate transmission wheel set 63 is greater than the width of the screw gear 5. This swivel joint structure is suitable for side-pull swivel joints. After injection molding and cooling, the drive member 61 drives the screw gear 5 to rotate through the first gear 62 and the first intermediate transmission wheel set 63, causing the screw 4 to slide relative to the swivel joint seat 7 along the axial direction of the screw 4. This, in turn, drives the swivel joint module 1 to slide along the axial direction of the screw 4. The screw gear 5 moves relative to the first intermediate transmission wheel set 63 along the axial direction of the screw 4. Therefore, the width of the gear meshing with the screw gear 5 in the first intermediate transmission wheel set 63 needs to be greater than the width of the screw gear 5 to ensure that the screw gear 5 and the first intermediate transmission wheel set 63 always remain in a meshed state.

[0058] The coilover module 1 has a receiving cavity, in which the screw gear 5 and the threaded gear 3 are both disposed. The first end of the screw member 4 is located outside the coilover module 1, and the second end of the screw member 4 passes through the coilover module 1 and is connected to the coilover module 1 via a bearing member 42. The second end of the threaded insert 2 is located outside the coilover module 1, and the first end of the threaded insert 2 passes through the coilover module 1. The portion of the screw gear 5 that meshes with the first intermediate transmission gear set 63 is located outside the receiving cavity to facilitate meshing and connection with the first intermediate transmission gear set 63. Figure 4 As shown, the coilover module 1 has a recessed clearance groove 13 on the side facing the first intermediate transmission wheel set 63. The clearance groove 13 extends along the axial direction of the screw member 4, and the part of the first intermediate transmission wheel set 63 that meshes with the screw gear 5 is placed in the clearance groove 13.

[0059] like Figure 1 , Figure 3 and Figure 4 As shown, the coilover seat 7 includes a first side seat 71, a second side seat 72, and a connecting seat 73. One end of the connecting seat 73 is connected to one end of the first side seat 71, and the other end of the connecting seat 73 is connected to one end of the second side seat 72. The coilover module 1 is disposed between the first side seat 71 and the second side seat 72, and both sides of the coilover module 1 are in contact with the first side seat 71 and the second side seat 72. The first end of the screw member 4 is screwed to the connecting seat 73. The coilover module 1 can slide within the space enclosed by the first side seat 71, the second side seat 72, and the connecting seat 73.

[0060] The coiled tooth structure also includes a fixing sleeve 8, which is fixedly connected to the coiled tooth seat 7. The fixing sleeve 8 is provided with a threaded hole. The fixing sleeve 8 is sleeved on the first end of the screw member 4, and the second thread 41 is screwed into the threaded hole. In this embodiment, the fixing sleeve 8 is fixedly set on the connecting seat 73 of the coiled tooth seat 7, realizing the screw connection between the screw member 4 and the connecting seat 73.

[0061] The coilover structure also includes a support base 9. The coilover base 7, the drive component 61, the first gear 62 and the first intermediate transmission wheel set 63 are all mounted on the support base 9. The support base 9 is located on the side of the coilover module 1 that has the clearance groove 13.

[0062] Combination Figure 4 and Figure 5 As shown, the surface of the first gear 62 is provided with a limiting groove 621 along the circumferential direction, and the support base 9 is provided with a limiting block 67. The limiting block 67 is slidably connected to the limiting groove 621. The limiting block 67 can abut against both ends of the limiting groove 621 to limit the rotation angle of the first gear 62, thereby limiting the range of movement of the coilover module 1 along the axial direction of the screw member 4.

[0063] This embodiment also provides an injection mold, which includes a stationary mold 100 and the aforementioned threaded structure. The stationary mold 100 has an injection cavity, and the second end of the threaded insert 2 of the threaded structure can be placed inside or away from the injection cavity. This threaded structure is suitable for side-pulling threaded connections, has a simple structure, and is suitable for machining internal threads with small pitch and fine teeth. Other structures of the injection mold are existing technologies and will not be described in detail here.

[0064] Example 2

[0065] like Figure 6 and Figure 7 As shown, this embodiment provides a threaded structure for an injection mold, comprising a threaded module 1, a threaded insert 2, a screw rod 4, and a drive assembly 6. The first end of the threaded insert 2 is rotatably connected to the threaded module 1, and a threaded gear 3 is connected to the first end of the threaded insert 2. The second end of the threaded insert 2 has a first thread 21. The first end of the screw rod 4 has a second thread 41, and a screw gear 5 is connected to the second end of the screw rod 4. The second end of the screw rod 4 is rotatably connected to the threaded module 1. The drive assembly 6 drives the screw rod 4 to rotate via the screw gear 5 and drives the threaded insert 2 to rotate via the threaded gear 3. The rotation of the screw rod 4 causes the threaded module 1 to move axially along the screw rod 4, thereby moving the second end of the threaded insert 2 away from the injection mold cavity of the stationary mold 100. The threaded insert 2 and the screw rod 4 rotate synchronously. The ratio of the number of teeth of the screw gear 3 to the number of teeth of the screw gear 5 is equal to the ratio of the pitch of the first thread 21 to the pitch of the second thread 41.

[0066] The drive assembly 6 drives the screw 4 to rotate via the screw gear 5. The drive assembly 6 also drives the threaded insert 2 to rotate via the threaded gear 3. The rotation of the screw 4 causes the threaded module 1 to move axially along the screw 4, thereby moving the second end of the threaded insert 2 away from the injection mold cavity of the stationary mold 100. The threaded insert 2 rotates synchronously with the screw 4. After injection molding and cooling, the threaded structure unwinds the threaded insert 2. The ratio of the number of teeth on the threaded gear 3 to the number of teeth on the screw gear 5 is equal to the ratio of the pitch of the first thread 21 to the pitch of the second thread 41. This gear transmission structure amplifies the thread on the screw 4. The pitch of the second thread 41 is multiple of that of the first thread 21, which improves the service life of the screw 4 while achieving thread unwinding, and is suitable for processing internal threads with small pitch and fine teeth. The rotation of the screw 4 causes the threaded die 1 to move along the axial direction of the screw 4. While driving the second end of the threaded die insert 2 to gradually move away from the injection mold cavity of the stationary mold 100, the threaded die insert 2 rotates, achieving thread unwinding. However, this threaded die structure is less likely to damage the tail tooth of the internal thread, thus improving the yield. In addition, the threaded die structure is small in size, which can reduce the size of the injection mold.

[0067] In this embodiment, the swivel thread module 1 is disposed on the side of the stationary mold 100 opposite to the injection mold cavity, and the second thread 41 of the screw member 4 is screwed to the stationary mold 100. This swivel thread structure is suitable for stationary mold swivel situations where the injection mold volume is relatively large. To improve the stability of the swivel thread module 1 moving axially along the screw member 4, the swivel thread structure is provided with multiple screw members 4, and each screw member 4 is provided with multiple screw gears 5. Figure 7 and Figure 8 As shown, the drive assembly 6 includes a drive member 61, a drive wheel 64, a first gear 62, a second intermediate transmission wheel set 65, and a third intermediate transmission wheel set 66. The drive wheel 64 is connected to the drive member 61. The first gear 62 meshes with both the drive wheel 64 and the second intermediate transmission wheel set 65. The second intermediate transmission wheel set 65 is connected to multiple screw gears 5 and to the third intermediate transmission wheel set 66. The third intermediate transmission wheel set 66 is connected to the threaded gear 3. The drive member 61 drives multiple screw gears 5 to rotate synchronously through the drive wheel 64, the first gear 62, and the second intermediate transmission wheel set 65. At the same time, the drive member 61 drives the threaded gear 3 to rotate through the drive wheel 64, the first gear 62, the second intermediate transmission wheel set 65, and the third intermediate transmission wheel set 66, thus realizing the synchronous rotation of multiple screw components 4 and the synchronous rotation of screw components 4 and threaded inserts 2.

[0068] Optionally, such as Figure 10 As shown, multiple threaded inserts 2 are provided, which can be set according to the number of internal threaded holes in the product to be injection molded. Each threaded insert 2 is provided with a threaded gear 3. Since the spacing between the internal threaded holes in the product to be injection molded is relatively small, the spacing between two adjacent threaded inserts 2 is also relatively small. In order to avoid interference between the threaded gears 3 on two adjacent threaded inserts 2, the two adjacent threaded gears 3 are staggered along the axial direction of the threaded insert 2. The threaded gears 3 are relatively small in size, so multiple threaded gears 3 mesh with the screw gear 5 respectively, reducing the number of components.

[0069] For example, such as Figures 8 to 10As shown, there are four screw members 4 and eight threaded inserts 2. The four screw members 4 form a rectangle, and the eight threaded inserts 2 are located in the middle of the space enclosed by the four screw members 4. The second intermediate transmission gear set 65 includes a second transmission gear 651 and a third transmission gear 652. Each screw member 4 is provided with a corresponding second transmission gear 651. The second transmission gear 651 meshes with the corresponding screw gear 5. The third transmission gear 652 meshes with the first gear 62 and also meshes with two of the second transmission gears 651. The third intermediate transmission gear set 66 includes two fourth transmission gears 661 and two fifth transmission gears 662. One fourth transmission gear 661 is positioned between the second transmission gear 651 meshing with the third transmission gear 652 and one of the remaining second transmission gears 651. The other fourth transmission gear 661 is positioned between the other second transmission gear 651 meshing with the third transmission gear 652 and the remaining second transmission gear 651. The fourth transmission gear 661 meshes with the two corresponding second transmission gears 651. Each fourth transmission gear 661 is also meshed with a fifth transmission gear 662. Eight threaded inserts 2 are arranged in two rows, with four threaded inserts 2 in each row. The threaded gears 3 on adjacent threaded inserts 2 are offset along the axial direction of the threaded insert 2. Two fifth transmission gears 662 are positioned between the two rows of threaded inserts 2, and each fifth transmission gear 662 meshes with four threaded gears 3 positioned on either side of it. The drive unit 61 drives the third transmission gear 652 to rotate via the drive wheel 64 and the first gear 62. The third transmission gear 652 drives the two second transmission gears 651 meshing with it to rotate. Each second transmission gear 651 drives one of the remaining second transmission gears 651 to rotate via the fourth transmission gear 661, thus achieving synchronous rotation of the four screw components 4. Simultaneously, the rotation of the fourth transmission gear 661 drives the fifth transmission gear 662 meshing with it to rotate, and the fifth transmission gear 662 drives the threaded gears 3 meshing with it to rotate, thus achieving synchronous rotation of the eight threaded inserts 2.

[0070] The second intermediate transmission wheel set 65 and the third intermediate transmission wheel set 66 can also be other structures, which can be set according to the number and arrangement of the screw parts 4 and the number and arrangement of the thread inserts 2, without specific limitations here.

[0071] Continue to refer to Figure 6 and Figure 7 As shown, the threaded joint structure also includes a fixing sleeve 8, which is connected to the stationary mold 100. The fixing sleeve 8 has a threaded hole and is sleeved on the first end of the screw member 4, with the second thread 41 threaded into the threaded hole. In this embodiment, the fixing sleeve 8 is fixed to the stationary mold 100, and each screw member 4 is provided with a corresponding fixing sleeve 8, thus realizing the threaded connection between the screw member 4 and the stationary mold 100.

[0072] The coilover module 1 includes a first gear plate 11 and a second gear plate 12 connected to the first gear plate 11. The first gear plate 11 and the second gear plate 12 are fastened together to form a cavity that accommodates a first gear 62, a second intermediate transmission wheel set 65, and a third intermediate transmission wheel set 66. A drive member 61 and a drive wheel 64 are disposed on the first gear plate 11. The first end of the screw member 4 passes through the first gear plate 11 and is screwed to the fixing sleeve 8. By setting the coilover module 1 as a two-part structure, it is convenient to install the first gear 62, the second intermediate transmission wheel set 65, and the third intermediate transmission wheel set 66, and the first gear 62, the second intermediate transmission wheel set 65, and the third intermediate transmission wheel set 66 are not exposed on the outside, thus improving the safety of operation.

[0073] A bearing 42 is fitted onto the second end of the screw component 4. The inner ring of the bearing 42 is connected to the screw component 4, and the outer ring of the bearing 42 is connected to the coilover module 1, thus realizing the rotational connection between the screw component 4 and the coilover module 1. To ensure the stability of the rotational connection between the coilover module 1 and the screw component 4, bearings 42 are provided on both sides of the screw gear 5. The bearing 42 on one side of the screw gear 5 is connected to the first gear plate 11, and the bearing 42 on the other side of the screw gear 5 is connected to the second gear plate 12.

[0074] The surface of the first gear 62 is provided with a limiting groove 621 along the circumferential direction. The first gear plate 11 is provided with a limiting block 67. The limiting block 67 is slidably connected to the limiting groove 621. The limiting block 67 can abut against both ends of the limiting groove 621 to limit the rotation angle of the first gear 62, thereby limiting the range of movement of the coilover module 1 along the axial direction of the screw member 4.

[0075] After the injection molding process is completed and cooled, the drive unit 61 drives multiple screw gears 5 to rotate synchronously through the drive wheel 64, the first gear 62, and the second intermediate transmission wheel set 65, so that the threaded module 1 moves away from the stationary mold 100. At the same time, the drive unit 61 drives the threaded gear 3 to rotate through the drive wheel 64, the first gear 62, the second intermediate transmission wheel set 65, and the third intermediate transmission wheel set 66, so that the threaded insert 2 gradually separates from the injection-molded product, and the required internal thread is formed on the injection-molded product.

[0076] See Figure 6 As shown, this embodiment also provides an injection mold, which includes a stationary mold 100 and the aforementioned threaded structure of the injection mold. The stationary mold 100 is provided with an injection mold cavity, and the second end of the threaded insert 2 of the threaded structure can be placed inside or away from the injection mold cavity. This threaded structure is suitable for the case of threaded fixing of a stationary mold, has a simple structure, and is suitable for processing internal threads with relatively small pitch and fine threads.

[0077] The injection mold also includes an upper fixed plate 200, which is connected to the injection molding machine. The upper fixed plate 200 is positioned on the side of the threaded die assembly 1 away from the stationary mold 100. After injection molding and cooling, the threaded die assembly 1 and the stationary mold 100 move towards the side away from the upper fixed plate 200, so that the threaded die assembly 1 and the upper fixed plate 200 are spaced apart, providing space for the threaded insert 2 in the threaded die assembly 1 to exit the injection mold cavity of the stationary mold 100. After the threading is completed and the product in the injection mold cavity is removed, the threaded die assembly 1 moves towards the stationary mold 100 to reset, so that the second end of the threaded insert 2 is placed in the injection mold cavity, and the threaded die assembly 1 and the stationary mold 100 move towards the upper fixed plate 200 to reset.

[0078] Other structures of injection molds are existing technologies and will not be described in detail here.

[0079] 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: Coilover module (1); A threaded insert (2), the first end of which is rotatably connected to the threaded module (1), and the first end of the threaded insert (2) is connected to a threaded gear (3), and the second end of the threaded insert (2) is provided with a first thread (21); The screw component (4) has a second thread (41) at its first end and a screw gear (5) at its second end. The second end of the screw component (4) is rotatably connected to the coilover module (1). The drive assembly (6) drives the screw (4) to rotate via the screw gear (5) and drives the threaded insert (2) to rotate via the threaded gear (3). The rotation of the screw (4) causes the threaded module (1) to move along the axial direction of the screw (4) so ​​as to drive the second end of the threaded insert (2) away from the injection mold cavity of the stationary mold (100). The threaded insert (2) rotates synchronously with the screw (4). The ratio of the number of teeth of the screw gear (3) to the number of teeth of the screw gear (5) is equal to the ratio of the pitch of the first thread (21) to the pitch of the second thread (41).

2. The threaded structure of the injection mold according to claim 1, characterized in that, The coiled tooth structure also includes a coiled tooth seat (7), which is disposed on the side of the stationary mold (100). The second thread (41) of the screw (4) is threadedly connected to the coiled tooth seat (7), and the coiled tooth module (1) and the coiled tooth seat (7) are slidably connected along the axial direction of the screw (4). The drive assembly (6) includes a drive member (61), a first gear (62), and a first intermediate transmission wheel set (63). The first gear (62) is connected to the drive member (61). The first gear (62) and the screw gear (5) are respectively meshed with the first intermediate transmission wheel set (63). The width of the gear meshing between the first intermediate transmission wheel set (63) and the screw gear (5) is greater than the width of the screw gear (5). The screw gear (5) is connected to the helical gear (3) in a transmission connection. The drive member (61) drives the screw gear (5) to rotate through the first gear (62) and the first intermediate transmission wheel set (63), so that the coilover module (1) slides along the axial direction of the screw member (4), and the rotation of the screw gear (5) drives the helical gear (3) to rotate.

3. The threaded structure of the injection mold according to claim 2, characterized in that, The coilover structure also includes a support base (9). The coilover base (7), the drive member (61), the first gear (62), and the first intermediate transmission wheel set (63) are all disposed on the support base (9). The surface of the first gear (62) is provided with a limiting groove (621) along the circumferential direction. The support base (9) is provided with a limiting block (67). The limiting block (67) is slidably connected to the limiting groove (621). The limiting block (67) can abut against both ends of the limiting groove (621) to limit the rotation angle of the first gear (62).

4. The threaded structure of the injection mold according to claim 2, characterized in that, The coiled tooth structure also includes a fixing sleeve (8), which is fixedly connected to the coiled tooth seat (7). The fixing sleeve (8) is provided with a threaded hole. The fixing sleeve (8) is sleeved on the first end of the screw member (4), and the second thread (41) is screwed into the threaded hole.

5. The threaded structure of the injection mold according to claim 1, characterized in that, The coiled tooth structure includes a plurality of screw components (4), and each screw component (4) is provided with a screw gear (5); The drive assembly (6) includes a drive member (61), a drive wheel (64), a first gear (62), a second intermediate transmission wheel set (65), and a third intermediate transmission wheel set (66). The drive wheel (64) is connected to the drive member (61). The first gear (62) meshes with the drive wheel (64) and the second intermediate transmission wheel set (65). The second intermediate transmission wheel set (65) is connected to a plurality of screw gears (5) and to the third intermediate transmission wheel set (66). The third intermediate transmission wheel set (66) is connected to the helical gear (3). The drive member (61) drives the plurality of screw gears (5) to rotate synchronously through the drive wheel (64), the first gear (62), and the second intermediate transmission wheel set (65). At the same time, the drive member (61) drives the helical gear (3) to rotate through the drive wheel (64), the first gear (62), the second intermediate transmission wheel set (65), and the third intermediate transmission wheel set (66).

6. The threaded structure of the injection mold according to claim 5, characterized in that, The second thread of the screw member (4) is used to screw into the stationary mold (100), and the threaded module (1) is disposed on the side of the stationary mold (100) away from the injection mold cavity; The coilover module (1) includes a first gear plate (11) and a second gear plate (12) connected to the first gear plate (11). The first gear plate (11) and the second gear plate (12) are fastened together to form a cavity that accommodates the first gear (62), the second intermediate transmission wheel set (65) and the third intermediate transmission wheel set (66). The driving member (61) and the driving wheel (64) are disposed on the first gear plate (11).

7. The threaded structure of the injection mold according to claim 6, characterized in that, The surface of the first gear (62) is provided with a limiting groove (621) along the circumferential direction, and the first gear plate (11) is provided with a limiting block (67). The limiting block (67) is slidably connected to the limiting groove (621), and the limiting block (67) can abut against both ends of the limiting groove (621) to limit the angle of rotation of the first gear (62).

8. The threaded structure of the injection mold according to claim 6, characterized in that, The coiled tooth structure also includes a fixing sleeve (8), which is connected to the stationary mold (100). The fixing sleeve (8) has a threaded hole and is sleeved on the first end of the screw member (4), and the second thread (41) is screwed into the threaded hole.

9. The threaded structure of the injection mold according to any one of claims 2 to 5, characterized in that, The threaded insert (2) is provided in multiple ways, and each threaded insert (2) is provided with a threaded toothed gear (3). Two adjacent threaded toothed gears (3) are offset along the axial direction of the threaded insert (2).

10. An injection mold, characterized in that, The mold includes a stationary mold (100) and a threaded structure for the injection mold according to any one of claims 1-9. The stationary mold (100) is provided with an injection mold cavity, and the second end of the threaded insert (2) of the threaded structure can be placed inside or away from the injection mold cavity.

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