Die for producing thread product

Abstract

The utility model discloses a die for producing a threaded product. A front die comprises a first front die block, a second front die block fixedly connected with the first front die block, and a thread withdrawing structure, the thread withdrawing structure comprises an air cylinder driving device fixedly connected with the outer side of the first front module, a side tooth transmission rail in transmission connection with the air cylinder driving device, a driving gear pair in gear connection with the side tooth transmission rail, a driven gear pair in gear connection with the driving gear pair, and a rotating structure in transmission connection with the driven gear pair. After a threaded product is formed, the front mold retreats upwards under the action of external driving force, in the retreating process of the front mold, the side tooth transmission rail drives the driving gear pair to rotate, then the rotating structures are driven to rotate to retreat from the threaded product, the multiple rotating structures are arranged to ensure that the mold can form multiple threaded products at a time, the production efficiency is high, and the production cost is low. And the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of injection molding, especially a mold for producing threaded products. BACKGROUND

[0002] The existing mold for producing internal threads of products is an equipment that utilizes the rotation of the thread mold to separate the mold and the part. However, when the thread mold is separated from the part, the thread mold and the part are in a threaded cooperation state. If the part is forcibly separated, the part will be deformed, which will seriously affect the shape and quality of the part, and even cause damage to the part. Therefore, the threaded product can only be ejected after the threaded core in the mold is rotated out. The existing mold structure is complex, and a set of mold can only produce one type of product, which occupies a large space, has a long processing cycle during production, low production efficiency, and high cost. SUMMARY

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a mold for producing threaded products.

[0004] The technical scheme adopted by the utility model to solve its technical problems is: a mold for producing threaded products, comprising a front mold and a rear mold, the front mold comprises a first front mold block, a second front mold block fixedly connected with the first front mold block, and a thread withdrawing structure fixedly connected with the first front mold block and extending out of the first front mold block, the thread withdrawing structure extends into the interior of the second front mold block, the thread withdrawing structure comprises a cylinder driving device fixedly connected with the outer side of the first front mold block, a side tooth transmission rail in transmission connection with the cylinder driving device, a driving gear pair in gear connection with the side tooth transmission rail, a driven gear pair in gear connection with the driving gear pair, and a rotating structure in transmission connection with the driven gear pair, the driving gear pair is defined in the first front mold block, the driven gear pair is defined in the second front mold block, and the rotating structure extends out from the second front mold block towards the rear mold.

[0005] Preferably, the first front mold block is provided with a guide rail groove, a first main tooth accommodating cavity communicated with the side surface of the guide rail groove, a second main tooth accommodating cavity communicated with the upper side of the first main tooth accommodating cavity, and a third main tooth accommodating cavity communicated with the side surface of the second main tooth accommodating cavity, the second main tooth accommodating cavity and the third main tooth accommodating cavity penetrate the top of the first front mold block, the side tooth transmission rail is in transmission with the cylinder driving device and is defined in the guide rail groove, the length of the guide rail groove is greater than that of the side tooth transmission rail, and the side surface of the side tooth transmission rail towards the first main tooth accommodating cavity is provided with a linear tooth.

[0006] Preferably, the driving gear pair is defined by a first main gear contained in a first main gear containing cavity, a second main gear contained in a second main gear containing cavity, and a third main gear contained in a third main gear containing cavity, the first main gear is hinged to the bottom of the first front module, the first main gear is engaged with the linear teeth of the side tooth transmission rail, the center of the first main gear is provided with a first rotation shaft towards the second main gear, the first rotation shaft is provided with a first tangent plane, the second main gear is rotationally connected with the first rotation shaft, the third main gear is engaged with the second main gear, the center of the third main gear is provided with a third rotation shaft towards the second front module, and the third rotation shaft is provided with a third tangent plane.

[0007] Preferably, the driven gear pair is provided with a first driven gear rotationally connected with the third rotation shaft, two second driven gears engaged with the two sides of the first driven gear respectively, and four third driven gears engaged with the second driven gears, the second front module is provided with a first driven containing cavity containing the first driven gear, a second driven containing cavity containing the second driven gear, and a third driven containing cavity containing the third driven gear on the side of the second front module facing the first front module, and the second front module is provided with a detachable replacement plate on the side of the second front module facing the rear module, and the rotation structure passes through the detachable replacement plate and extends to the outside of the detachable replacement plate.

[0008] Preferably, the rotation structure includes a shaft type threaded core in transmission connection with the third driven gear and in threaded connection with the first front module, a first bearing and a second bearing hinged to the shaft type threaded core, the first bearing and the second bearing are in interference fit connection with the second front module, the shaft type threaded core includes a rotation shaft body in transmission connection with the third driven gear, a flange fixed in the middle of the rotation shaft body and protruding from the periphery of the rotation shaft body, and a threaded shaped core provided at the bottom of the rotation shaft body, the first bearing is provided on the upper side of the third driven gear, the second bearing is provided on the upper side of the flange, the rotation shaft body extends out of the second front module, the part of the rotation shaft body extending out of the second front module is provided with external threads, and the first bearing and the second bearing are interference fit assembled in the second front module.

[0009] The beneficial effect of this utility model is that it provides a mold for producing threaded products. In application, the threaded product is formed by injection molding on the top of a rotating structure. After the threaded product is formed, the front mold retracts upwards under external driving force. During the retraction of the front mold, the cylinder drive device drives the side gear transmission rail to move linearly. The side gear transmission rail drives the drive gear pair to rotate, which in turn drives the driven gear pair to rotate, thereby driving the rotating structure to rotate and eject the threaded product. Multiple rotating structures are provided, ensuring that the mold can form multiple threaded products at once, resulting in high production efficiency and reduced production costs. As the front mold retracts upwards, the rotating structure rotates and ejects the threaded product until it is completely ejected. The formed threaded product remains in the rear mold, which then ejects it, completing the injection molding process. The side gear transmission rail, drive gear pair, and driven gear pair are all confined within the front mold, making the overall mold structure compact and the overall mold volume small. When different models of threaded products need to be produced, the rotating structure and detachable plate can be replaced to produce multiple models of threaded products, saving production costs.

[0010] This utility model has a compact structure, occupies a small volume, has high production efficiency, and reduces production costs. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of a mold for producing threaded products according to this utility model.

[0012] Figure 2 This is an exploded structural diagram of a mold for producing threaded products according to this utility model.

[0013] Figure 3 This is a partial structural diagram of the front mold of a mold for producing threaded products according to this utility model.

[0014] Figure 4 yes Figure 3 A schematic diagram of the structure of area A.

[0015] Figure 5 This is a schematic diagram of the side gear transmission rail and driven gear pair of a mold for producing threaded products according to this utility model.

[0016] Figure 6 This is a partial structural diagram of the front mold of a mold for producing threaded products according to this utility model, taken from another direction.

[0017] Figure 7 yes Figure 6 A schematic diagram of the structure of area B.

[0018] Figure 8 This is a partial structural diagram of the front mold and driven gear pair of a mold for producing threaded products according to this utility model.

[0019] Figure 9 This is a schematic diagram of the rotating structure of a mold for producing threaded products according to this utility model. Detailed Implementation

[0020] The embodiments of this utility model will be described below with reference to the accompanying drawings and related examples. The embodiments of this utility model are not limited to the following examples, and this utility model relates to relevant necessary components in this technical field, which should be regarded as well-known technology in this technical field and can be known and mastered by those skilled in this technical field.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, 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. Furthermore, the terms "one," "two," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. It should also be noted in the description of this utility model that, unless otherwise explicitly specified and limited, the terms "set" and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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 connection of 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.

[0022] Reference Figures 1 to 9 The present invention is implemented as follows: A mold for producing threaded products includes a front mold 001 and a rear mold 002. The front mold 001 includes a first front module 1, a second front module 2 fixedly connected to the first front module 1, and a thread-unscrewing structure 3 fixed to and extending out of the first front module 1. The thread-unscrewing structure 3 extends into the interior of the second front module 2. The thread-unscrewing structure 3 includes a cylinder drive device 31 fixedly connected to the outside of the first front module 1, a side gear drive rail 32 driven by the cylinder drive device 31, a drive gear pair 33 gearedly connected to the side gear drive rail 32, a driven gear pair 34 gearedly connected to the drive gear pair 33, and a rotating structure 35 drivenly connected to the driven gear pair 34. The drive gear pair 33 is confined within the first front module 1, the driven gear pair 34 is confined within the second front module 2, and the rotating structure 35 extends from the second front module 2 toward the rear mold 002. Multiple rotating structures 35 are provided.

[0023] In application of this utility model, a threaded product 003 is formed on the top of the rotating structure 35 by injection molding. After the threaded product 003 is formed, the front mold 001 retracts upward under the action of external driving force. During the retraction of the front mold 001, the cylinder drive device 31 drives the side gear transmission rail 32 to move linearly. The side gear transmission rail 32 drives the drive gear pair 33 to rotate, which in turn drives the driven gear pair 34 to rotate, which in turn drives the rotating structure 35 to rotate. Multiple rotating structures 35 are provided, and each rotating structure 35 has an external thread. After the threaded product 003 is formed, it is wrapped around the external thread of the rotating structure 35. The multiple rotating structures 35 ensure that the mold can form multiple threaded products 003 at one time. During the upward retraction of the front mold 001, the rotating structure 35 rotates and exits the threaded product 003 until the rotating structure 35 is completely exited from the threaded product 003. The formed threaded product 003 without the rotating structure 35 remains in the rear mold 002. The rear mold 002 ejects the threaded product 003 to complete the entire injection molding process.

[0024] This utility model has a compact structure and can form multiple threaded products 003 in one go, resulting in high production efficiency. During the process of the front mold 001 retracting upward, the cylinder drive device 31 drives the rotating structure 35 to exit the threaded product 003. The structure is compact and occupies little space.

[0025] Based on the above embodiments, as a further preferred embodiment, the first front module 1 is provided with a guide rail groove 11, a first main tooth receiving cavity 12 communicating with the side of the guide rail groove 11, a second main tooth receiving cavity 13 communicating with the upper side of the first main tooth receiving cavity 12, and a third main tooth receiving cavity 14 communicating with the side of the second main tooth receiving cavity 13. The second main tooth receiving cavity 13 and the third main tooth receiving cavity 14 penetrate the top of the first front module 1. The side tooth transmission rail 32 is driven by the cylinder drive device 31 and confined within the guide rail groove 11. The length of the guide rail groove 11 is greater than that of the side tooth transmission rail 32, which facilitates the linear movement of the tooth transmission rail 32 within the guide rail groove 11. The side of the side tooth transmission rail 32 facing the first main tooth receiving cavity 12 is provided with linear teeth 321.

[0026] The active gear pair 33 includes a first main gear 331 confined in the first main gear receiving cavity 12, a second main gear 332 confined in the second main gear receiving cavity 13, and a third main gear 333 confined in the third main gear receiving cavity 14. The first main gear 331 and the third main gear 333 are respectively hinged to the bottom of the first front module 1. The first main gear 331 meshes with the linear teeth 321 of the side gear transmission rail 32. The center of the first main gear 331 is provided with a first rotating shaft 3311 facing the second main gear 332. The first rotating shaft 3311 is provided with a first tangent plane 3312. The second main gear 332 is rotatably connected to the first rotating shaft 3311. The third main gear 333 meshes with the second main gear 332. The center of the third main gear 333 is provided with a third rotating shaft 3331 facing the second front module 2. The third rotating shaft 3331 is provided with a third tangent plane 3332.

[0027] The driven gear pair 34 includes a first driven wheel 341 rotatably connected to the third rotating shaft 3331, two second driven wheels 342 meshing with both sides of the first driven wheel 341 respectively, and four third driven wheels 343 meshing with the second driven wheels 342. The second front module 2, facing the first front module 1, has a first driven receiving cavity 21 for accommodating the first driven wheel 341, a second driven receiving cavity 22 for accommodating the second driven wheel 342, and a third driven receiving cavity 23 for accommodating the third driven wheels 343. The second front module 2, facing the rear mold 002, has a removable replacement plate 24. The rotating structure 35 passes through the removable replacement plate 24 and extends to the outside of the removable replacement plate 24.

[0028] The cylinder drive device 31 drives the side gear transmission rail 32 to move linearly within the guide rail groove 11. The side gear transmission rail 32 drives the first main gear 331 to rotate, which in turn drives the first rotating shaft 3311 to rotate. The first rotating shaft 3311 has a first tangent plane 3312. The second main gear 332 is sleeved on the outside of the first rotating shaft 3311 and rotatably connected to the first rotating shaft 3311. Therefore, the first rotating shaft 3311 drives the second main gear 332 to rotate. The rotation of the second main gear 332 drives the third main gear 333 to rotate, which in turn drives the third rotating shaft 3331 to rotate. The third rotating shaft 3331 has a third tangent plane 3332. The first driven wheel... 341 is sleeved on the outside of the third rotating shaft 3331 and is connected to the third rotating shaft 3331 for transmission. The rotation of the third rotating shaft 3331 drives the first driven wheel 341 to rotate, which in turn drives the second driven wheel 342 to rotate. The second driven wheel 342 is located on both sides of the first driven wheel 341. The second driven wheel 342 drives the third driven wheel 343. Each second driven wheel 342 drives four smaller diameter third driven wheels 343 to rotate in four directions. The third driven wheels 343 drive the rotating structure 35 to rotate. As the front mold 001 retracts upward, the rotating structure 35 rotates and exits the threaded product 003 until the rotating structure 35 is completely exited from the threaded product 003.

[0029] This utility model embodiment can form eight threaded products 003 in one go, which has high production efficiency and reduces production costs.

[0030] The guide rail groove 11, the first main gear receiving cavity 12, the second main gear receiving cavity 13, and the third main gear receiving cavity 14 are disposed in the first front module 1, and the first driven receiving cavity 21, the second driven receiving cavity 22, and the third driven receiving cavity 23 are disposed in the second front module 2. Thus, the side gear transmission rail 32, the driving gear pair 33, and the driven gear pair 34 are all confined within the front mold 001, making the overall structure of the mold compact and the overall mold volume small.

[0031] Based on the above embodiments, as a further preferred embodiment, the rotating structure 35 includes a shaft-type threaded core 351 that is driven by the third driven wheel 343 and threadedly connected to the first front module 1, a first bearing 352 and a second bearing 353 hinged to the shaft-type threaded core 351, the first bearing 352 and the second bearing 353 being interference-fitted with the second front module 2, and the shaft-type threaded core 351 including a rotating shaft 3511 that is driven by the third driven wheel 343, and a component fixed in the middle of the rotating shaft 3511 and protruding out of the rotating shaft 3511. The rotating shaft 3511 has a flange 3512 and a threaded core 3513 at the bottom of the rotating shaft 3511. The top of the rotating shaft 3511 is threadedly connected to the first front module 1. The first bearing 352 is located on the upper side of the third driven wheel 343, and the second bearing 353 is located on the upper side of the flange 3512. The rotating shaft 3511 extends out of the second front module 2, and the portion of the rotating shaft 3511 extending out of the second front module 2 is provided with external threads. The first bearing 352 and the second bearing 353 are interference-fitted into the removable replacement plate 24.

[0032] The first bearing 352 and the second bearing 353 are interference-fitted in the detachable replacement compartment. At the same time, the rotating cores of the first bearing 352 and the second bearing 353 are interference-fitted with the rotating shaft 3511. When the third driven wheel 343 drives the rotating shaft 3511, the first bearing 352 and the second bearing 353 ensure the stability of the rotating shaft 3511 during rotation, and at the same time ensure that the position of the rotating shaft 3511 will not wobble due to rotation.

[0033] The shaft-type threaded core 351 is threadedly connected to the first front module 1, making the position of the shaft-type threaded core 351 more accurate and stable. Under the rotation of the third driven wheel 343, the shaft-type threaded core 351 continues to rotate into the first front module 1 and drives the shaft-type threaded core 351 to retract into the first front module 1, thereby realizing that the entire shaft-type threaded core 351 can be more stably exited from the threaded product 003 under the drive of the rotation of the third driven wheel 343.

[0034] The specific shape of the thread shaping core 3513 can be replaced according to the specific structure of the product to be produced. When it is necessary to change to produce other threaded products 003, the rotating structure 35 suitable for other threaded products 003 can be replaced. In order to make the rotating structure 35 more stable when rotating, the detachable replacement plate 24 can be replaced, thereby ensuring the stability of the rotating structure 35 when rotating. It can also allow the same set of molds to produce different threaded products 003, reducing production costs.

[0035] It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A die for producing a threaded product, comprising a front die (001) and a back die (002), characterized in that The front mold (001) includes a first front module (1), a second front module (2) fixedly connected with the first front module (1), a thread stripping structure (3) fixedly extended from the first front module (1), the thread stripping structure (3) extending into the interior of the second front module (2), the thread stripping structure (3) including a cylinder driving device (31) fixedly connected with the outside of the first front module (1), a side tooth transmission rail (32) in transmission connection with the cylinder driving device (31), a driving gear pair (33) in gear connection with the side tooth transmission rail (32), a driven gear pair (34) in gear connection with the driving gear pair (33), a rotating structure (35) in transmission connection with the driven gear pair (34), the driving gear pair (33) being defined in the first front module (1), the driven gear pair (34) being defined in the second front module (2), the rotating structure (35) extending out from the second front module (2) towards the rear mold (002).

2. A die for producing a threaded product as claimed in claim 1, characterized in that The first front module (1) is provided with a guide rail groove (11), a first main tooth accommodating cavity (12) in communication with the side of the guide rail groove (11), a second main tooth accommodating cavity (13) in communication with the upper side of the first main tooth accommodating cavity (12), a third main tooth accommodating cavity (14) in communication with the side of the second main tooth accommodating cavity (13), the second main tooth accommodating cavity (13) and the third main tooth accommodating cavity (14) penetrating the top of the first front module (1), the side tooth transmission rail (32) being in transmission with the cylinder driving device (31) and being defined in the guide rail groove (11), the length of the guide rail groove (11) being greater than that of the side tooth transmission rail (32), the side of the side tooth transmission rail (32) towards the first main tooth accommodating cavity (12) being provided with a linear tooth (321).

3. A die for producing a threaded product as claimed in claim 2, characterized in that The driving gear pair (33) includes a first main gear (331) defined in the first main tooth accommodating cavity (12), a second main gear (332) defined in the second main tooth accommodating cavity (13), and a third main gear (333) defined in the third main tooth accommodating cavity (14), the first main gear (331) being hingedly connected with the bottom of the first front module (1), the first main gear (331) being in mesh with the linear tooth (321) of the side tooth transmission rail (32), the center of the first main gear (331) being provided with a first rotating shaft (3311) towards the second main gear (332), the first rotating shaft (3311) being provided with a first tangent plane (3312), the second main gear (332) being in rotational connection with the first rotating shaft (3311), the third main gear (333) being in mesh with the second main gear (332), the center of the third main gear (333) being provided with a third rotating shaft (3331) towards the second front module (2), the third rotating shaft (3331) being provided with a third tangent plane (3332).

4. A die for producing a threaded product as claimed in claim 3, characterized in that The driven gear pair (34) is provided with a first driven gear (341) rotatably connected with the third rotating shaft (3331), two second driven gears (342) respectively engaged with the two sides of the first driven gear (341), and four third driven gears (343) engaged with the second driven gears (342). The second front module (2) is provided with a first driven accommodating cavity (21) accommodating the first driven gear (341), a second driven accommodating cavity (22) accommodating the second driven gear (342), and a third driven accommodating cavity (23) accommodating the third driven gear (343) on the side of the second front module (2) facing the first front module (1). The second front module (2) is provided with a detachable replacement plate (24) on the side facing the rear module (002). The rotating structure (35) passes through the detachable replacement plate (24) and extends to the outside of the detachable replacement plate (24).

5. A die for producing a threaded product as claimed in claim 4, characterized in that The rotating structure (35) includes an axial threaded core (351) threadedly connected with the first front module (1) and drivingly connected with the third driven gear (343), a first bearing (352) and a second bearing (353) hingedly connected with the axial threaded core (351), and the first bearing (352) and the second bearing (353) are connected with the second front module (2) in an interference fit. The axial threaded core (351) includes a rotating shaft body (3511) drivingly connected with the third driven gear (343), a flange (3512) fixed in the middle of the rotating shaft body (3511) and protruding from the periphery of the rotating shaft body (3511), and a threaded shaping core (3513) arranged at the bottom of the rotating shaft body (3511). The first bearing (352) is arranged on the upper side of the third driven gear (343), and the second bearing (353) is arranged on the upper side of the flange (3512). The rotating shaft body (3511) extends out of the second front module (2), and the portion of the rotating shaft body (3511) extending out of the second front module (2) is provided with external threads. The first bearing (352) and the second bearing (353) are assembled in the second front module (2) in an interference fit.

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