Injection mold

Abstract

The invention relates to an injection mold. Comprising a front mold mechanism which comprises a first front mold part and a second front mold part which are connected in a sliding mode in the first direction, and a glue injection hole is formed in the first front mold part; the rear mold mechanism comprises a first rear mold part, a second rear mold part and a third rear mold part which are sequentially stacked, the third rear mold part makes contact with the second front mold part, a cavity is formed between the third rear mold part and the second front mold part, and the first rear mold part and the second rear mold part, the second rear mold part and the third rear mold part, and the third rear mold part and the second front mold part can relatively slide in the first direction; the thread twisting mechanism comprises a thread shaft and a pulling core, the pulling core is fixedly connected with the first rear module and is arranged in the second rear module and the third rear module in a sliding and penetrating mode, and the thread shaft is rotationally connected with the second rear module and is arranged in the third rear module in a sliding and penetrating mode; the inner slide mechanism comprises a fixed seat, an inner shoveling machine and an inner sliding piece; and the outer slide mechanism comprises an outer shoveling machine and an outer sliding piece, so that the production efficiency of the injection mold on products is improved.

Description

Technical Field

[0001] The present application relates to the technical field of injection molds, and in particular to an injection mold. Background Art

[0002] Injection molds are widely used in the field of plastic molding technology. Some products have complex internal and external structures. For traditional injection molds, it is usually difficult to mold the internal and external structures of the product at one time. After the injection mold processes the product once, it is necessary to use other equipment to perform secondary processing on the product to finally form the product. Therefore, traditional injection molds usually have the defect of low product production efficiency. Summary of the invention

[0003] A technical problem solved by the present application is how to improve the production efficiency of injection molds for products.

[0004] An injection mold, comprising:

[0005] The front mold mechanism comprises a first front mold member and a second front mold member which are slidably connected along a first direction, wherein a glue injection hole is provided on the first front mold member;

[0006] A rear mold mechanism, comprising a first rear mold, a second rear mold and a third rear mold stacked in sequence, wherein the third rear mold contacts the second front mold and a mold cavity is formed therebetween, and the first rear mold and the second rear mold, the second rear mold and the third rear mold, and the third rear mold and the second front mold can all slide relative to each other along the first direction;

[0007] The thread twisting mechanism comprises a thread shaft and a core puller, wherein the core puller is fixedly connected to the first rear mold and slidably penetrates the second rear mold and the third rear mold, and the thread shaft is rotatably connected to the second rear mold and slidably penetrates the third rear mold;

[0008] An inner position mechanism comprises a fixed seat, an inner shovel and an inner slide, wherein the fixed seat is fixedly connected to the second front mold, the inner shovel is fixedly connected to the first front mold and is slidably disposed in the fixed seat, and the inner shovel drives the inner slide to slide relative to the fixed seat in a second direction perpendicular to the first direction to move away from the cavity; and

[0009] The outer position mechanism includes an outer shovel and an outer sliding member. The outer shovel is fixedly connected to the second front mold. The outer shovel drives the outer sliding member to slide relative to the third rear mold along the second direction to move away from the cavity.

[0010] In one embodiment, the threading mechanism further includes a driving shaft, a driving gear and a driven gear, wherein the driving shaft is rotatably connected to the first rear module and the second rear module, the driving gear is fixedly sleeved on the driving shaft and meshes with the driven gear, and the driven gear is fixedly sleeved on the threading shaft.

[0011] In one embodiment, the tooth shaft includes a shaft portion and a convex ring, the convex ring is sleeved on the shaft portion, the shaft portion is rotatably connected to the second rear mold, and the second rear mold abuts between the driven gear and the convex ring.

[0012] In one embodiment, the shaft portion includes a cylindrical section and a conical section. Along the direction of the cylindrical section pointing to the conical section, the cross-sectional size of the cylindrical section is constant and is rotationally connected to the second rear module, and the cross-sectional size of the conical section is reduced and is slidingly connected to the third rear module.

[0013] In one embodiment, there are multiple tooth shafts, and the driven gears on the multiple tooth shafts are all meshed with the driving gear.

[0014] In one of the embodiments, the core-pulling sliding sleeve is arranged in the tooth axis.

[0015] In one embodiment, the fixed seat is provided with a receiving hole and a sliding hole that are interconnected, and the internal shovel machine includes an internal fixed portion and an internal guide portion, the internal guide portion is provided with a first inclined surface, the internal guide portion is protrudingly arranged on the first inclined surface, the internal sliding member has a second inclined surface, the second inclined surface is provided with an internal guide cavity that is slidably matched with the internal guide portion, the first inclined surface and the second inclined surface can contact each other and both and the internal guide cavity extend in a direction that is an acute angle with the first direction, and point from the front mold mechanism to the rear mold mechanism along the first direction, and the distance from the first inclined surface to the central axis of the fixed seat gradually decreases; the internal fixed portion is slidably matched with the receiving hole along the first direction, the internal sliding member is slidably matched with the sliding hole along the second direction, and the internal guide portion is slidably matched with the internal guide cavity.

[0016] In one embodiment, the external shovel includes an external fixing part and an external guiding part, the external fixing part is fixedly connected to the second front mold, the external fixing part has a first inclined surface, the external guide part is protruding on the first inclined surface, the external sliding part has a second inclined surface, and the second inclined surface is recessed to form an external guide cavity that slides with the external guide part. The first inclined surface and the second inclined surface can contact each other and both and the external guide cavity extend in a direction that is an acute angle to the first direction, and along the first direction from the front mold mechanism to the rear mold mechanism, the distance from the first inclined surface to the cavity gradually increases.

[0017] In one embodiment, the outer guide cavity has a first guide surface and a second guide surface arranged in parallel, the first guide surface and the first inclined surface have the same extension direction, the first guide surface is closer to the cavity than the second guide surface, and in the mold closing state, the outer guide portion is in contact with the first guide surface and is separated from the second guide surface by a set distance.

[0018] In one embodiment, the rear mold mechanism further includes an elastic member, and the elastic member abuts between the second rear mold and the third rear mold.

[0019] A technical effect of an embodiment of the present application is: since the tooth shaft, core pulling, fixed seat, inner sliding part and outer sliding part can all be used to mold the internal structure and external structure of the product at different positions on the same injection mold, the external structure and internal structure of the product are molded at one time by the same injection mold, which effectively avoids the external structure and internal structure of the product being molded by multiple different equipment, thereby reducing the transfer time and processing time of the product between different equipment, thereby improving the production efficiency of the injection mold for the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the three-dimensional cross-sectional structure of the product.

[0021] FIG. 2 is a schematic diagram of the three-dimensional structure of an injection mold provided in an embodiment.

[0022] FIG. 3 is a schematic diagram of a first example exploded structure of the injection mold shown in FIG. 1 .

[0023] FIG. 4 is a schematic diagram of a second example exploded structure of the injection mold shown in FIG. 1 .

[0024] FIG. 5 is a schematic diagram of a three-dimensional cross-sectional structure of the injection mold shown in FIG. 1 at a first position.

[0025] FIG. 6 is a schematic diagram of a three-dimensional cross-sectional structure of the injection mold in FIG. 1 at a second position.

[0026] FIG. 7 is a schematic diagram of a three-dimensional cross-sectional structure of the thread twisting mechanism and the inner position mechanism in the injection mold shown in FIG. 1 .

[0027] FIG8 is a schematic diagram of a three-dimensional cross-sectional structure of the tooth axis in the injection mold described in FIG1 .

[0028] FIG. 9 is a schematic three-dimensional cross-sectional view of the structure of the thread twisting mechanism and the inner position mechanism in the injection mold shown in FIG. 1 after being decomposed.

[0029] FIG. 10 is a schematic diagram of the exploded structure of the inner position structure in the injection mold shown in FIG. 1 .

[0030] FIG. 11 is a schematic diagram of a three-dimensional cross-sectional structure of FIG. 10 .

[0031] FIG. 12 is a schematic diagram of a three-dimensional cross-sectional structure of the injection mold in FIG. 1 at a third position.

[0032] FIG. 13 is a schematic diagram of the three-dimensional structure of the outer positioning mechanism in the injection mold of FIG. 1 .

[0033] FIG. 14 is a schematic diagram of the exploded structure of the outer position mechanism shown in FIG. 13 .

[0034] FIG. 15 is a schematic diagram of a three-dimensional cross-sectional structure of the outer position mechanism shown in FIG. 13 .

[0035] Reference numerals: injection mold 10, product 20, outer undercut 21, inner undercut 22, thread 23, screw 101, guide column 102, cavity 11, front mold mechanism 100, first front mold 110, injection hole 111, second front mold 120, rear mold mechanism 200, first rear mold 210, second rear mold 220, third rear mold 230, elastic member 240, thread mechanism 300, thread shaft 310, shaft portion 311, cylindrical section 3111, conical section 3112, convex ring 312, core pulling 320, drive shaft 330, driving gear 340, driven gear 350, inner positioning mechanism 400, fixed seat 430, receiving hole 431, sliding hole 432, inner shovel 410, inner fixing portion 411, first inclined surface 4111, inner guide portion 412, inner sliding member 420, second inclined surface 421, inner guide cavity 422, outer positioning mechanism 500, outer shovel 510, outer fixing portion 511, first inclined surface 5111, outer guide portion 512, outer sliding member 520, second inclined surface 521, outer guide cavity 522, first guide surface 5221, second guide surface 5222. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0037] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0038] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0040] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0042] 1, 2, 3 and 4, an injection mold 10 provided in one embodiment of the present application is used for injection molding a product 20, and the product 20 has structures such as an outer undercut 21, an inner undercut 22 and a thread 23. The injection mold 10 includes a front mold mechanism 100, a rear mold mechanism 200, a thread mechanism 300, an inner position mechanism 400 and an outer position mechanism 500.

[0043] Referring to FIG. 2 , FIG. 5 and FIG. 6 , in some embodiments, the front mold mechanism 100 includes a first front mold 110 and a second front mold 120, the first front mold 110 and the second front mold 120 are stacked on each other, and a glue injection hole 111 is provided on the first front mold 110. The first front mold 110 and the second front mold 120 are connected by sliding along a first direction, for example, the first front mold 110 and the second front mold 120 can be connected by sliding by means of a guide column 102 and a hole. The first front mold 110 can slide relative to the second front mold 120 and be pulled apart by a certain distance, so that there is a certain distance between the first front mold 110 and the second front mold 120 along the first direction, and the maximum distance between the first front mold 110 and the second front mold 120 can be limited by a screw 101.

[0044] Referring to FIG. 2 , FIG. 5 and FIG. 6 , in some embodiments, the rear mold mechanism 200 includes a first rear mold 210, a second rear mold 220 and a third rear mold 230, and the first rear mold 210, the second rear mold 220 and the third rear mold 230 are stacked in sequence, so that the second rear mold 220 is stacked between the first rear mold 210 and the third rear mold 230. The third rear mold 230 contacts the second front mold 120, so that a cavity 11 is formed between the third rear mold 230 and the second front mold 120. The cavity 11 is connected to the injection hole 111, and the molten plastic liquid is injected into the cavity 11 through the injection hole 111. It can be understood that along the first direction, the first rear mold 210, the second rear mold 220, the third rear mold 230, the second front mold 120 and the first front mold 110 are stacked in sequence. The first rear module 210 and the second rear module 220 are connected by sliding along the first direction. For example, the first rear module 210 and the second rear module 220 can be connected by sliding by means of the guide column 102 and the hole. The first rear module 210 can slide relative to the second rear module 220 and be pulled apart by a certain distance, so that there is a certain distance between the first rear module 210 and the second rear module 220 along the first direction. The maximum sliding distance between the first rear module 210 and the second rear module 220 can be limited by the screw 101. The second rear module 220 and the third rear module 230 are connected by sliding along the first direction, for example, the second rear module 220 and the third rear module 230 can be connected by sliding by means of the guide column 102 and the hole, and the second rear module 220 can slide relative to the third rear module 230 to be pulled apart by a certain distance, so that a certain distance exists between the second rear module 220 and the third rear module 230 along the first direction, and the maximum distance between the second rear module 220 and the third rear module 230 can be limited by the screw 101. The third rear module 230 and the second front module 120 are connected by sliding along the first direction, for example, the third rear module 230 and the second front module 120 can be connected by sliding by means of the guide column 102 and the hole, and the third rear module 230 can slide relative to the second front module 120 to be pulled apart by a certain distance, so that a certain distance exists between the third rear module 230 and the second front module 120 along the first direction.

[0045] Referring to FIG. 12 , in some embodiments, the rear mold mechanism 200 further includes an elastic member 240, and the elastic member 240 abuts between the second rear mold 220 and the third rear mold 230. For example, the second rear mold 220 and / or the third rear mold 230 are provided with mounting holes. In other words, only the second rear mold 220 may be provided with mounting holes, or only the third rear mold 230 may be provided with mounting holes, or both the second rear mold 220 and the third rear mold 230 may be provided with mounting holes, and the elastic member 240 may be accommodated in the mounting holes. When the mold is closed, the elastic member 240 is compressed and stores energy. When the first rear mold 210 and the second rear mold 220 are relatively slid and pulled apart by a certain distance under the action of external force, the elastic member 240 will release energy, thereby pushing the second rear mold 220 and the third rear mold 230 to relatively slide and also pull apart by a certain distance.

[0046] Referring to FIG. 4 , FIG. 6 and FIG. 7 , in some embodiments, the thread twisting mechanism 300 includes a thread shaft 310 and a core pull 320, one end of the core pull 320 is fixedly connected to the first rear mold 210, and the core pull 320 is slidably disposed in the second rear mold 220 and the third rear mold 230, so that the core pull 320 can slide relative to the second rear mold 220 and the third rear mold 230 along the first direction. The thread shaft 310 is rotatably connected to the second rear mold 220, and the thread shaft 310 is slidably disposed in the third rear mold 230. It can be understood that the thread shaft 310 can also rotate relative to the third rear mold 230. That is, the thread shaft 310 can rotate relative to the second rear mold 220 and the third rear mold 230 at the same time. When the second rear mold 220 and the third rear mold 230 slide relative to each other, the thread shaft 310 will also slide relative to the third rear mold 230. The threaded shaft 310 extends into the mold cavity 11 to form the thread 23 structure on the product 20 .

[0047] Referring to Fig. 4, Fig. 6 and Fig. 7, the threading mechanism 300 further includes a driving shaft 330, a driving gear 340 and a driven gear 350. The driving shaft 330 is rotatably connected with the first rear mold 210 and the second rear mold 220, the driving gear 340 is fixedly sleeved on the driving shaft 330, and the driven gear 350 is fixedly sleeved on the tooth shaft 310, and the driving gear 340 and the driven gear 350 are meshed with each other. When the driving shaft 330 rotates, the driving shaft 330 will drive the tooth shaft 310 to rotate through the driving gear 340 and the driven gear 350. The tooth shaft 310 has a thread 23 structure, and when the tooth shaft 310 rotates, the thread 23 structure on the tooth shaft 310 can form the thread 23 structure on the product 20. There can be multiple tooth shafts 310, and the driven gears 350 on the multiple tooth shafts 310 are all meshed with the same driving gear 340 on the driving shaft 330, that is, the driving shaft 330 can drive the multiple tooth shafts 310 to rotate at the same time, so that different tooth shafts 310 can form the thread 23 structure on different products 20, so the same injection mold 10 can form multiple products 20 at the same time, thereby improving the production efficiency of the injection mold 10.

[0048] Referring to FIG. 7 , FIG. 8 and FIG. 9 , in some embodiments, the tooth shaft 310 includes a shaft portion 311 and a convex ring 312, and the convex ring 312 is sleeved on the shaft portion 311, so that the convex ring 312 protrudes a certain length relative to the shaft portion 311 along the radial direction of the shaft portion 311. The shaft portion 311 is rotatably connected with the second rear module 220 and the third rear module 230, and the shaft portion 311 can slide relative to the third rear module 230. When the shaft portion 311 is inserted into the second rear module 220, the second rear module 220 abuts between the driven gear 350 and the convex ring 312 along the first direction, so the shaft portion 311 cannot slide relative to the second rear module 220 along the first direction through the limiting effect of the driven gear 350 and the convex ring 312, so the entire tooth shaft 310 will follow the second rear module 220 and slide relative to the third rear module 230 along the first direction.

[0049] Referring to FIG. 7 , FIG. 8 and FIG. 9 , in some embodiments, the core pull 320 is slidably sleeved in the tooth shaft 310, so the tooth shaft 310 can rotate relative to the core pull 320 or slide relative to the core pull 320. The core pull 320 extends into the mold cavity 11, so that the core pull 320 forms the internal structure of the product 20. By slidably sleeved on the tooth shaft 310, the core pull 320 can make full use of the space in the tooth shaft 310, reduce the space occupied by the entire thread twisting mechanism 300, and thus realize the compact design of the injection mold 10 in structure.

[0050] Referring to FIG. 7, FIG. 8 and FIG. 9, during the mold opening process, when the first rear mold 210 slides away from the second rear mold 220 along the first direction, since the core puller 320 is fixedly connected to the first rear mold 210, the core puller 320 and the first rear mold 210 will slide synchronously, that is, the first rear mold 210 will drive the core puller 320 to slide relative to the tooth axis 310 to move away from the product 20. After the first rear mold 210 and the second rear mold 220 are pulled apart by a certain distance, the core puller 320 will completely separate from the product 20. During the sliding process of the first rear mold 210 away from the second rear mold 220, the drive shaft 330 can be rotated, and then the drive shaft 330 drives the tooth axis 310 to rotate through the driving gear 340 and the driven gear 350. The tooth axis 310 will form the thread 23 mechanism of the product 20 during the rotation process. Under the action of the elastic member 240, the elastic member 240 will drive the second rear mold 220 to slide away from the third rear mold 230, so that the tooth axis 310 will rotate and slide relative to the third rear mold 230 at the same time, so that the tooth axis 310 will gradually withdraw from the product 20 while forming the thread 23 structure of the product 20. After the second rear mold 220 and the third rear mold 230 are pulled apart by a certain distance, the tooth axis 310 will completely leave the product 20.

[0051] Referring to FIG. 7 , FIG. 8 and FIG. 9 , in some embodiments, the shaft portion 311 includes a cylindrical section 3111 and a tapered section 3112. In the direction from the cylindrical section 3111 to the tapered section 3112, the cross-sectional size of the cylindrical section 3111 is constant, and the cross-sectional size of the tapered section 3112 gradually decreases. The cylindrical section 3111 can be rotatably connected to the second rear mold 220, and the tapered section 3112 can be slidably connected to the third rear mold 230. In the process of the tooth shaft 310 gradually withdrawing from the product 20, by providing the tapered section 3112, the contact area and friction resistance between the tapered section 3112 and the third rear mold 230 can be gradually reduced, so that the tooth shaft 310 can be quickly separated from the product 20, thereby improving the demoulding efficiency and production efficiency of the product 20. On the other hand, it can also prevent the tooth shaft 310 from pulling the product 20 and causing damage to the product 20, thereby improving the molding quality of the product 20.

[0052] Referring to FIGS. 7, 9, 10 and 11, in some embodiments, the inner position mechanism 400 includes a fixed seat 430, an inner shovel 410 and an inner slide 420. The fixed seat 430 is fixedly connected to the second front mold 120, the inner shovel 410 is fixedly connected to the first front mold 110, and the inner shovel 410 is slidably disposed in the fixed seat 430 along the first direction. The fixed seat 430 can be used to form the internal structure of the product 20. The inner shovel 410 can drive the inner slide 420 to slide relative to the fixed seat 430 along the second direction to move away from the cavity 11. The second direction is perpendicular to the first direction. The first direction can be understood as the vertical direction in the figure, and the second direction can be understood as the horizontal direction in the figure. The inner slide 420 can be used to form the inner undercut 22 of the product 20. When the inner slide 420 moves away from the product 20 along the second direction, the interference of the inner slide 420 with the product 20 along the first direction can be eliminated, so that the product 20 can move along the first direction to leave the cavity 11. When the first front module 110 slides relative to the second front module 120 and the distance is pulled away, the inner shovel 410 will follow the first front module 110 to move synchronously, so that the inner shovel 410 slides along the first direction relative to the fixed seat 430. When the second front module 120 slides relative to the third rear module 230 and the distance is pulled away, the fixed seat 430 will follow the second front module 120 to move synchronously, so that the fixed seat 430 gradually withdraws from the product 20.

[0053] 7, 9, 10 and 11, in some embodiments, the fixing seat 430 is provided with a receiving hole 431 and a sliding hole 432, and the sliding hole 432 is connected with the receiving hole 431 and the cavity 11. The inner shovel 410 includes an inner fixing portion 411 and an inner guide portion 412, the inner fixing portion 411 is fixedly connected to the first front mold 110, and the inner fixing portion 411 has a first inclined surface 4111, and the inner guide portion 412 is protrudingly arranged on the first inclined surface 4111. The inner sliding member 420 has a second inclined surface 421, and an inner guide cavity 422 is formed on the second inclined surface 421. The first inclined surface 4111 and the second inclined surface 421 can contact each other. The first inclined surface 4111 and the second inclined surface 421 have the same extension direction as the inner guide cavity 422, and the extension direction forms an acute angle with the first direction, that is, the first inclined surface 4111, the second inclined surface 421 and the inner guide cavity 422 are arranged to be inclined relative to the first direction. Along the first direction from the front mold mechanism 100 to the rear mold mechanism 200, the distance from the first inclined surface 4111 to the central axis of the fixed seat 430 gradually decreases. The inner fixing portion 411 slides with the receiving hole 431 along the first direction, the inner guide portion 412 slides with the inner guide cavity 422, and the inner sliding member 420 slides with the sliding hole 432 along the second direction. A portion of the inner sliding member 420 can be received in the receiving hole 431, and another portion of the inner sliding member 420 can extend into the cavity 11 through the sliding hole 432 to form the inner undercut 22 of the product 20.

[0054] Referring to FIG. 7, FIG. 9, FIG. 10 and FIG. 11, therefore, during the mold opening process, the first front mold 110 can slide relative to the second front mold 120, so that the first front mold 110 drives the inner fixing part 411 and the entire inner shovel 410 to slide relative to the fixing seat 430 along the first direction. Through the action of the inner guide cavity 422 inclined relative to the first direction, the inner guide part 412 slides relative to the inner slide 420 along a direction at an acute angle to the first direction, so that the inner guide part 412 can generate a component force along the second direction on the inner slide 420, and then the inner slide 420 gradually withdraws from the product 20. When the first front mold 110 stops sliding relative to the second front mold 120, the inner slide 420 will completely withdraw from the product 20, and the interference of the inner slide 420 on the product 20 along the first direction can be eliminated, so that the fixing seat 430 can slide relative to the product 20 along the first direction. It can be understood that before the inner sliding member 420 is not removed from the product 20, the inner sliding member 420 will interfere with the product 20 along the first direction, so that the fixing seat 430 cannot slide relative to the product 20 along the first direction to remove the product 20. Through the interaction between the first inclined surface 4111 and the second inclined surface 421, a good avoidance space can be provided for the sliding of the inner sliding member 420 in the second direction, thereby preventing the inner sliding member 420 from getting stuck during the sliding process.

[0055] Referring to FIGS. 12, 13, 14 and 15, in some embodiments, the outer position mechanism 500 includes an outer shovel 510 and an outer slide 520, the outer shovel 510 is fixedly connected to the second front mold 120, and the outer shovel 510 drives the outer slide 520 to slide relative to the third rear mold 230 along the second direction to move away from the cavity 11. The outer slide 520 is used to form an outer undercut 21 of the molded product 20. The outer shovel 510 includes an outer fixing portion 511 and an outer guide portion 512, the outer fixing portion 511 is fixedly connected to the second front mold 120, the outer fixing portion 511 has a first inclined surface 5111, and the outer guide portion 512 is protrudingly arranged on the first inclined surface 5111. The outer sliding member 520 has a second inclined surface 521, and the second inclined surface 521 is recessed to form an outer guide cavity 522. The first inclined surface 5111 and the second inclined surface 521 can contact each other. The first inclined surface 5111 and the second inclined surface 521 have the same extension direction as the outer guide cavity 522, and the extension direction forms an acute angle with the first direction, that is, the first inclined surface 5111, the second inclined surface 521 and the outer guide cavity 522 are inclined relative to the first direction. From the front mold mechanism 100 to the rear mold mechanism 200 along the first direction, the distance from the first inclined surface 5111 to the cavity 11 gradually increases.

[0056] Referring to FIG. 12, FIG. 13, FIG. 14 and FIG. 15, therefore, during the mold opening process, the second front mold 120 can slide relative to the third rear mold 230, so that the second front mold 120 drives the inner fixing part 411 and the entire outer shovel 510 to slide relative to the third rear mold 230 along the first direction, and through the action of the outer guide cavity 522 inclined relative to the first direction, the outer guide part 512 slides relative to the outer slide 520 along a direction at an acute angle to the first direction, so that the outer guide part 512 can generate a component force along the second direction on the inner slide 420, and then the inner slide 420 gradually withdraws from the product 20. When the second front mold 120 stops sliding relative to the second front mold 120, the outer slide 520 will completely withdraw from the product 20, and the interference of the outer slide 520 on the product 20 along the first direction can be eliminated, so that the product 20 is separated from the outer slide 520. Through the interaction between the first inclined surface 5111 and the second inclined surface 521 , a good avoidance space can be provided for the sliding of the outer sliding member 520 in the second direction, thereby preventing the outer sliding member 520 from getting stuck during the sliding process.

[0057] Referring to FIGS. 12, 13, 14 and 15, in some embodiments, the outer guide cavity 522 has a first guide surface 5221 and a second guide surface 5222, the first guide surface 5221 and the second guide surface 5222 are arranged in parallel, and the first guide surface 5221 and the second guide surface 5222 extend in the same direction as the first inclined surface 5111, so that the first guide surface 5221 and the first inclined surface 5111 are also arranged in parallel. The first guide surface 5221 and the second guide surface 5222 are spaced a certain distance apart along the sliding direction of the outer sliding member 520, that is, the first guide surface 5221 and the second guide surface 5222 are spaced a certain distance apart along the second direction, and the first guide surface 5221 is closer to the cavity 11 than the second guide surface 5222. In the mold closing state, the outer guide portion 512 contacts the first guide surface 5221 and is spaced a set distance apart from the second guide surface 5222.

[0058] It can be understood that during the sliding process of the second front module 120 relative to the third rear module 230, the fixed seat 430 will immediately slide relative to the product 20. Specifically, since in the mold closing state, the outer guide portion 512 contacts the first guide surface 5221 and is spaced apart from the second guide surface 5222 by a set distance, before the outer guide portion 512 contacts the second guide surface 5222, the outer guide portion 512 cannot generate a component force along the second direction on the outer sliding member 520, so the outer sliding member 520 cannot slide relative to the third rear module 230 and move away from the product 20, that is, the sliding of the outer sliding member 520 will produce a certain delay, so that the outer sliding member 520 still holds the product 20 tightly, so that relative movement between the fixed seat 430 and the product 20 can be ensured, and the fixed seat 430 can be smoothly separated from the product 20. After relative sliding occurs between the fixed seat 430 and the product 20, when the outer guide portion 512 contacts the second guide surface 5222, the outer guide portion 512 will generate a component force along the second direction on the outer sliding portion, so the outer sliding part 520 will slide relative to the third rear module 230 and away from the product 20, so that the product 20 detaches from the outer sliding part 520.

[0059] The working principle of the injection mold 10 is described below:

[0060] In the first step, the injection mold 10 is closed, molten plastic is injected into the cavity 11 through the injection hole 111 , and the molten plastic is gradually cooled under a certain pressure so that the molten plastic is solidified to form a product 20 .

[0061] In the second step, the first front module 110 is made to slide relative to the second front module 120. The first front module 110 drives the inner fixing portion 411 and the entire inner shovel 410 to slide relative to the fixed seat 430 along the first direction, so that the inner sliding member 420 completely withdraws from the product 20, thereby eliminating the interference of the inner sliding member 420 with the product 20 along the first direction, thereby laying the foundation for the subsequent sliding of the fixed seat 430 relative to the product 20 along the first direction.

[0062] In the third step, the first rear mold 210 is caused to slide away from the second rear mold 220 along the first direction, and the first rear mold 210 will drive the core puller 320 to slide relative to the tooth axis 310 to move away from the product 20. When the first rear mold 210 and the second rear mold 220 are separated by a certain distance, the core puller 320 will completely separate from the product 20. In the process of the first rear mold 210 sliding away from the second rear mold 220, the drive shaft 330 can be rotated. Under the action of the elastic member 240, the elastic member 240 will drive the second rear mold 220 to slide away from the third rear mold 230, so that the tooth axis 310 rotates and slides relative to the third rear mold 230 at the same time, so that the tooth axis 310 forms the thread 23 structure of the product 20 while gradually withdrawing from the product 20. After the second rear mold 220 and the third rear mold 230 are separated by a certain distance, the tooth axis 310 will completely separate from the product 20.

[0063] In the fourth step, the second front module 120 is caused to slide relative to the third rear module 230. In view of the delay effect of the outer sliding member 520, the outer sliding member 520 holds the product 20 tightly, so that the fixing seat 430 can slide relative to the product 20, and then the product 20 can be separated from the fixing seat 430. When the outer guide portion 512 contacts the first guide surface 5221, the outer guide portion 512 will generate a component force along the second direction on the outer sliding portion, and the outer sliding member 520 will slide relative to the third rear module 230 and away from the product 20, so that the product 20 is separated from the outer sliding member 520. In this way, the product 20 is smoothly demoulded.

[0064] Considering that the tooth axis 310, the core pulling part 320, the fixing seat 430, the inner sliding part 420 and the outer sliding part 520 can all be used to mold the internal structure and the external structure of the product 20 at different positions on the same injection mold 10, the external structure and the internal structure of the product 20 are molded at one time by the same injection mold 10, which effectively avoids the external structure and the internal structure of the product 20 being molded by multiple different equipment, thereby reducing the transfer time and processing time of the product 20 between different equipment, thereby improving the production efficiency of the injection mold 10 for the product 20.

[0065] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An injection mold, characterized in that: include: The front mold mechanism comprises a first front mold member and a second front mold member which are slidably connected along a first direction, wherein a glue injection hole is provided on the first front mold member; A rear mold mechanism, comprising a first rear mold, a second rear mold and a third rear mold stacked in sequence, wherein the third rear mold contacts the second front mold and a mold cavity is formed therebetween, and the first rear mold and the second rear mold, the second rear mold and the third rear mold, and the third rear mold and the second front mold can all slide relative to each other along the first direction; The thread twisting mechanism comprises a thread shaft and a core puller, wherein the core puller is fixedly connected to the first rear mold and slidably penetrates the second rear mold and the third rear mold, and the thread shaft is rotatably connected to the second rear mold and slidably penetrates the third rear mold; An inner position mechanism comprises a fixed seat, an inner shovel and an inner slide, wherein the fixed seat is fixedly connected to the second front mold, the inner shovel is fixedly connected to the first front mold and is slidably disposed in the fixed seat, and the inner shovel drives the inner slide to slide relative to the fixed seat in a second direction perpendicular to the first direction to move away from the cavity; and The outer position mechanism includes an outer shovel and an outer sliding member. The outer shovel is fixedly connected to the second front mold. The outer shovel drives the outer sliding member to slide relative to the third rear mold along the second direction to move away from the cavity.

2. The injection mold according to claim 1, characterized in that: The threading mechanism also includes a driving shaft, a driving gear and a driven gear. The driving shaft is rotatably connected to the first rear module and the second rear module. The driving gear is fixedly sleeved on the driving shaft and meshes with the driven gear. The driven gear is fixedly sleeved on the threading shaft.

3. The injection mold according to claim 2, characterized in that: The tooth shaft includes a shaft portion and a convex ring, the convex ring is sleeved on the shaft portion, the shaft portion is rotatably connected to the second rear mold, and the second rear mold abuts between the driven gear and the convex ring.

4. The injection mold according to claim 3, characterized in that: The shaft portion includes a cylindrical section and a conical section. Along the direction of the cylindrical section pointing to the conical section, the cross-sectional size of the cylindrical section is constant and is rotationally connected to the second rear module, and the cross-sectional size of the conical section is reduced and is slidingly connected to the third rear module.

5. The injection mold according to claim 2, characterized in that: There are multiple tooth shafts, and the driven gears on the multiple tooth shafts are all meshed with the driving gear.

6. The injection mold according to claim 1, characterized in that: The core-pulling sliding sleeve is arranged in the tooth shaft.

7. The injection mold according to claim 1, characterized in that: The fixing seat is provided with a receiving hole and a sliding hole that are interconnected, and the inner shovel machine includes an inner fixing portion and an inner guiding portion, the inner guiding portion is provided with a first inclined surface, the inner guiding portion is protrudingly arranged on the first inclined surface, the inner sliding member is provided with a second inclined surface, the second inclined surface is provided with an inner guiding cavity that is slidably matched with the inner guiding portion, the first inclined surface and the second inclined surface can contact each other and both and the inner guiding cavity extend in a direction that is an acute angle with the first direction, and point from the front mold mechanism to the rear mold mechanism along the first direction, and the distance from the first inclined surface to the central axis of the fixing seat gradually decreases; the inner fixing portion is slidably matched with the receiving hole along the first direction, the inner sliding member is slidably matched with the sliding hole along the second direction, and the inner guide portion is slidably matched with the inner guide cavity.

8. The injection mold according to claim 1, characterized in that: The external shovel includes an external fixing part and an external guiding part, the external fixing part is fixedly connected to the second front mold, the external fixing part has a first inclined surface, the external guiding part is protrudingly arranged on the first inclined surface, the external sliding part has a second inclined surface, and the second inclined surface is recessed to form an external guiding cavity that slides with the external guiding part, the first inclined surface and the second inclined surface can contact each other and both and the external guiding cavity extend in a direction that is an acute angle with the first direction, and along the first direction from the front mold mechanism to the rear mold mechanism, the distance from the first inclined surface to the cavity gradually increases.

9. The injection mold according to claim 8, characterized in that: The outer guide cavity has a first guide surface and a second guide surface arranged in parallel. The first guide surface and the first inclined surface have the same extension direction. The first guide surface is closer to the cavity than the second guide surface. In the mold closing state, the outer guide portion is in contact with the first guide surface and is separated from the second guide surface by a set distance.

10. The injection mold according to claim 1, characterized in that: The rear mold mechanism further includes an elastic member, and the elastic member abuts between the second rear mold and the third rear mold.

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