Injection mold

Abstract

The invention relates to an injection mold. Comprising a first mold mechanism provided with a glue injection hole; a cavity communicated with the glue injection hole is defined by the second mold mechanism and the first mold mechanism; the thread twisting mechanism comprises a loose core and a thread shaft, the thread shaft is arranged on the first mold mechanism, the loose core is rotationally sleeved with the thread shaft which is used for forming an internal thread of a product, and the loose core is used for forming an internal structure of the product and can slide relative to the thread shaft in the axial direction of the thread shaft. By arranging the tooth shaft and the loose core, the internal thread and the internal structure of the product can be formed through the tooth shaft and the loose core respectively, that is, the internal thread and the internal structure of the product are formed at a time through the same injection mold, the product is prevented from being machined through different devices, the transfer time and the machining time of the product between the different devices are shortened, and the machining efficiency is improved. Therefore, 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 first mold mechanism is provided with a glue injection hole;

[0006] A second mold mechanism, which, together with the first mold mechanism, forms a mold cavity connected to the injection hole; and

[0007] The thread-twisting mechanism includes a core-pulling device and a thread shaft, wherein the thread shaft is arranged on the first mold mechanism, the thread shaft is rotatably sleeved outside the core-pulling device and is used for forming the internal thread of the product, the core-pulling device is used for forming the internal structure of the product and can slide relative to the thread shaft along the axial direction of the thread shaft.

[0008] In one embodiment, the first mold mechanism includes a cover plate, a mounting plate and a first template. The mounting plate is located between the cover plate and the first template and is used to install the tooth axis. Along the axial direction of the tooth axis, the mounting plate is slidingly connected to the cover plate and the first template. The tooth axis is rotatably connected to the first template, and one end of the core pulling is fixedly connected to the cover plate.

[0009] In one embodiment, the first mold mechanism also includes a first fastener, which includes a coaxially arranged first rod portion and a first cap portion, the first rod portion is protrudingly arranged on the end surface of the first cap portion, and the cross-sectional size of the first rod portion is smaller than the cross-sectional size of the first cap portion; a first large hole and a first small hole are opened on the cover plate, the aperture of the first large hole is larger than the aperture of the first small hole, and a first step surface is provided at the connection between the first large hole and the first small hole; the first rod portion is inserted into the first small hole and fixedly connected to the mounting plate; when the mold is closed, the first cap portion is located in the first large hole and is spaced apart from the first step surface; when the mold is opened, the first cap portion can abut against the first step surface.

[0010] In one embodiment, the first mold mechanism also includes a second fastener, the second fastener includes a coaxially arranged second rod portion and a second cap portion, the second rod portion is protrudingly arranged on the end surface of the second cap portion, and the cross-sectional size of the second rod portion is smaller than the cross-sectional size of the second cap portion; a second large hole and a second small hole are opened on the first template, the aperture of the second large hole is larger than the aperture of the second small hole, and a second step surface is provided at the connection between the second large hole and the second small hole; the second rod portion is inserted into the second small hole and fixedly connected to the mounting plate; when the mold is closed, the second cap portion is located in the second large hole and is spaced apart from the second step surface; when the mold is opened, the second cap portion can abut against the second step surface.

[0011] In one embodiment, the first mold mechanism further includes an elastic member, and a receiving hole is formed in the first template and / or the mounting plate. The elastic member is received in the receiving hole and abuts against the first template and the mounting plate.

[0012] In one of the embodiments, the first mold mechanism further includes a sliding rod, the sliding rod is fixedly connected to the cover plate, and the sliding rod is slidably disposed in the mounting plate, the first mold plate and the second mold mechanism.

[0013] In one embodiment, the threading mechanism further includes a first gear and a second gear, both of which are rotatably disposed on the first mold mechanism, the first gear is fixedly sleeved outside the thread shaft, and the second gear is meshed with the first gear.

[0014] In one embodiment, the thread-cutting mechanism further includes a driving shaft and a driving wheel, the driving shaft is rotatably connected to the first mold mechanism, and the driving wheel and the second gear are both spaced apart and fixedly sleeved on the driving shaft.

[0015] In one embodiment, the core pulling comprises a first core and a second core, the first core sleeve is arranged outside the second core, the tooth axis rotating sleeve is arranged outside the first core, the end of the second core close to the mold cavity is located inside the first core, and the end of the second core close to the mold cavity is separated from the end of the first core close to the mold cavity by a set distance.

[0016] In one embodiment, the tooth shaft includes a shaft portion and a convex ring, the convex ring is arranged outside the shaft portion and abuts against the first mold mechanism, the shaft portion includes a first shaft segment, a second shaft segment and a third shaft segment, the first shaft segment and the second shaft segment are located on both sides of the convex ring, the third shaft segment is connected to the end of the second shaft segment away from the convex ring and is used for forming the internal thread of the product, and the cross-sectional size of the second shaft segment gradually decreases along the direction from the first shaft segment to the second shaft segment.

[0017] A technical effect of an embodiment of the present application is: by setting a threaded shaft and a core pulling, the internal thread and the internal structure of the product can be formed by the threaded shaft and the core pulling respectively, that is, the internal thread and the internal structure of the product can be formed at one time through the same injection mold, avoiding the product from being processed by different equipment, 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

[0018] FIG. 1 is a schematic diagram of the three-dimensional structure of the first product.

[0019] FIG. 2 is a schematic diagram of the three-dimensional structure of the second product.

[0020] FIG. 3 is a schematic diagram of the three-dimensional structure of an injection mold provided in an embodiment.

[0021] FIG. 4 is a schematic diagram of a three-dimensional cross-sectional structure of the injection mold shown in FIG. 1 at a first position.

[0022] FIG. 5 is a schematic diagram of a three-dimensional cross-sectional structure of the injection mold shown in FIG. 1 at a second position.

[0023] FIG. 6 is a schematic diagram of a three-dimensional cross-sectional structure of the injection mold shown in FIG. 1 at a third position.

[0024] FIG. 7 is a schematic diagram of a three-dimensional cross-sectional structure of the injection mold shown in FIG. 1 at a fourth position.

[0025] FIG. 8 is a schematic diagram of the exploded structure of the injection mold shown in FIG. 1 .

[0026] FIG. 9 is a schematic diagram of a three-dimensional cross-sectional structure of the pressing shaft in the injection mold shown in FIG. 1 .

[0027] FIG. 10 is a schematic diagram of a three-dimensional cross-sectional structure of the core pulling in the injection mold shown in FIG. 1 .

[0028] FIG. 11 is a schematic diagram of a partial three-dimensional structure of the injection mold shown in FIG. 1 .

[0029] FIG. 12 is a schematic diagram of the structure of FIG. 11 from above.

[0030] FIG. 13 is a schematic diagram of the exploded structure of the sliding mechanism used for molding the first product in the injection mold shown in FIG. 1 .

[0031] FIG. 14 is a schematic diagram of the exploded structure of the slide assembly of the slide mechanism shown in FIG. 13 .

[0032] FIG. 15 is a schematic diagram of the exploded structure of the sliding mechanism used for molding the second product in the injection mold shown in FIG. 1 .

[0033] FIG. 16 is a schematic diagram of the three-dimensional structure of a forming block used in conjunction with the sliding mechanism shown in FIG. 15 .

[0034] Figure numerals: injection mold 10, product 20, first product 21, sleeve 201, boss 202, second product 22, first mold mechanism 100, cover plate 110, first large hole 111, first small hole 112, first step surface 113, mounting plate 120, first template 130, second large hole 131, second small hole 132, second step surface 133, accommodating hole 134, first fastener 140, first rod 141, first cap 142, second fastener 150, second rod 151, second cap 152, elastic member 160, sliding rod 170, glue injection hole 180, cavity 190, second mold mechanism 200, second template 210, substrate 211, molding block 212, sliding cavity 21 21. base 220. accommodating cavity 221. positioning column 230. threading mechanism 300. core pulling 310. first core 311. second core 312. tooth axis 320. axis portion 321. first axis section 3211. second axis section 3212. third axis section 3213. convex ring 322. first gear 330. second gear 340. driving shaft 350. driving wheel 360. sliding mechanism 400. sliding assembly 401. shovel 410. fixing portion 411. first inclined surface 4111. matching portion 412. slider 420. guide cavity 421. first cavity 4211. second cavity 4212. second inclined surface 422. pushing mechanism 500. pushing plate 510. ejector pin 520. limiting column 530. elastic body 540. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] Referring to Figures 1, 2, 3, 4 and 5, an injection mold 10 provided in one embodiment of the present application is used to process a product 20. For example, two different products 20 can be processed on the same injection mold 10, and the two different products 20 are respectively recorded as a first product 21 and a second product 22. The first product 21 includes a sleeve 201 and a boss 202. The boss 202 is arranged in the sleeve 201. The sleeve 201 is arranged around the boss 202. There is a gap between the sleeve 201 and the boss 202 along the radial direction of the sleeve 201. The inner surface of the sleeve 201 needs to be processed with an internal thread. The injection mold includes a first mold mechanism 100, a second mold mechanism 200, a threading mechanism 300, a sliding mechanism 400 and a pushing mechanism 500. The first mold mechanism 100 and the second mold mechanism 200 are stacked on each other, so that the first mold mechanism 100 and the second mold mechanism 200 jointly surround the molding cavity 190.

[0042] Referring to Figures 4, 5, 6 and 7, in some embodiments, the first mold mechanism 100 includes a cover plate 110, a mounting plate 120 and a first template 130. The cover plate 110, the mounting plate 120 and the first template 130 can be stacked on each other, the mounting plate 120 is located between the cover plate 110 and the first template 130, and along the stacking direction of the first mold mechanism 100 and the second mold mechanism 200, the mounting plate 120 is slidably connected to the cover plate 110 and the first template 130, that is, the cover plate 110 can slide relative to the mounting plate 120, and the mounting plate 120 can slide relative to the first template 130, and the first template 130 and the second mold mechanism 200 jointly surround the molding cavity 190. The cover plate 110 , the mounting plate 120 and the first template 130 are all provided with injection holes 180 , which are interconnected with the cavity 190 . Molten plastic liquid can be injected into the cavity 190 through the injection holes 180 . The plastic liquid maintains a certain pressure in the cavity 190 and is cooled and solidified, so that the plastic liquid solidifies to form a product 20 .

[0043] Referring to FIG. 6 , in some embodiments, the first mold mechanism 100 further includes a first fastener 140, which may be a bolt or the like. The first fastener 140 includes a first rod portion 141 and a first cap portion 142, the first rod portion 141 and the first cap portion 142 are coaxially arranged, the first rod portion 141 is protrudingly arranged on the end surface of the first cap portion 142 in the axial direction, and the cross-sectional dimension of the first rod portion 141 is smaller than the cross-sectional dimension of the first cap portion 142. The cover plate 110 is provided with a first large hole 111 and a first small hole 112. The first large hole 111 is farther away from the mounting plate 120 than the first small hole 112. The first large hole 111 and the first small hole 112 are coaxially arranged. The aperture of the first large hole 111 is larger than the aperture of the first small hole 112, so that the first large hole 111 and the first small hole 112 form a stepped hole together. The stepped hole runs through the entire cover plate 110 along the thickness direction. The first large hole 111 and the first small hole 112 have a first stepped surface 113 at the connection point. The first rod portion 141 is inserted into the first small hole 112, so that the first rod portion 141 extends into the mounting plate 120 and is fixedly connected to the mounting plate 120, for example, the first rod portion 141 is threadedly connected to the mounting plate 120. When the injection mold 10 is closed, the first cap portion 142 is located in the first large hole 111, and the first cap portion 142 is spaced apart from the first step surface 113, that is, there is a certain distance between the first cap portion 142 and the first step surface 113. When the injection mold 10 is opened, the first cap portion 142 can abut against the first step surface 113. In fact, during the mold opening process, relative sliding occurs between the cover plate 110 and the mounting plate 120, thereby increasing the distance between the cover plate 110 and the mounting plate 120. When the first cap portion 142 abuts against the first step surface 113, the distance between the cover plate 110 and the mounting plate 120 increases to the maximum, and the cover plate 110 and the mounting plate 120 will no longer be able to slide relative to each other. Therefore, the distance between the first cap portion 142 and the first step surface 113 can determine the maximum stroke of relative sliding between the cover plate 110 and the mounting plate 120.

[0044] Referring to FIG. 6 , in some embodiments, the first mold mechanism 100 further includes a second fastener 150, which may be a bolt or the like. The second fastener 150 includes a second rod portion 151 and a second cap portion 152, which are coaxially arranged. The second rod portion 151 is protrudingly arranged on the end surface of the second cap portion 152 in the axial direction, and the cross-sectional dimension of the second rod portion 151 is smaller than the cross-sectional dimension of the second cap portion 152. The first template 130 is provided with a second large hole 131 and a second small hole 132, the second large hole 131 is further away from the mounting plate 120 than the second small hole 132, the second large hole 131 and the second small hole 132 are coaxially arranged, the aperture of the second large hole 131 is larger than the aperture of the second small hole 132, so that the second large hole 131 and the second small hole 132 jointly form a stepped hole, which passes through the entire first template 130 in the thickness direction, and the second large hole 131 and the second small hole 132 have a second stepped surface 133 at the connection point. The second rod portion 151 is inserted into the second small hole 132, so that the second rod portion 151 extends into the mounting plate 120 and is fixedly connected to the mounting plate 120, for example, the second rod portion 151 is threadedly connected to the mounting plate 120. When the injection mold 10 is closed, the second cap portion 152 is located in the second large hole 131, and the second cap portion 152 is spaced from the second step surface 133, that is, there is a certain distance between the second cap portion 152 and the second step surface 133. When the injection mold 10 is opened, the second cap portion 152 can abut against the second step surface 133. In fact, during the process of opening the mold, relative sliding occurs between the first template 130 and the mounting plate 120, thereby increasing the distance between the first template 130 and the mounting plate 120. When the second cap portion 152 abuts against the second step surface 133, the distance between the first template 130 and the mounting plate 120 increases to the maximum, and the first template 130 and the mounting plate 120 will no longer be able to slide relative to each other. Therefore, the distance between the second cap portion 152 and the second step surface 133 can determine the maximum relative sliding stroke between the first template 130 and the mounting plate 120 .

[0045] Referring to FIG. 7 , in some embodiments, the first mold mechanism 100 further includes an elastic member 160, and a receiving hole 134 is provided on the first template 130 and / or the mounting plate 120. For example, the first template 130 may have a receiving hole 134, or the mounting plate 120 may have a receiving hole 134, or both the first template 130 and the mounting plate 120 may have receiving holes 134. The elastic member 160 may be a spring, etc., and the elastic member 160 is received in the receiving hole 134, and both ends of the elastic member 160 abut against the first template 130 and the mounting plate 120 at the same time. By providing the receiving hole 134, the elastic member 160 and the elastic force direction of the elastic member 160 can be effectively limited. Under the pushing action of the elastic member 160, the mounting plate 120 can slide relative to the first template 130. In fact, during the mold opening process, the cover plate 110 is first stationary, and a force is applied to the mounting plate 120 through an external device, so that the mounting plate 120 slides away from the cover plate 110. The sliding of the mounting plate 120 relative to the first template 130 does not require an external force, and the mounting plate 120 and the first template 130 can be automatically pushed to move relative to each other only by the elastic force of the elastic member 160. When the cover plate 110 and the mounting plate 120 are separated, the constraint of the cover plate 110 on the mounting plate 120 can be released, so that the elastic member 160 pushes the mounting plate 120 to slide away from the first template 130.

[0046] Referring to FIG. 6 , in some embodiments, the first mold mechanism 100 further includes a slide bar 170, and the number of the slide bars 170 may be multiple, for example, the number of the slide bars 170 may be four, and the four slide bars 170 may be respectively arranged near the four right angles of the cover plate 110, the slide bars 170 are fixedly connected to the cover plate 110, and the slide bars 170 are slidably arranged in the mounting plate 120, the first template 130, and the second mold mechanism 200. Thus, through the guiding effect of the slide bars 170, the relative sliding accuracy between the cover plate 110 and the mounting plate 120 can be improved, the relative sliding accuracy between the first template 130 and the mounting plate 120 can be improved, and the relative sliding accuracy between the second mold mechanism 200 and the first template 130 can also be improved.

[0047] Referring to FIG. 4, FIG. 5 and FIG. 8, in some embodiments, the threading mechanism 300 includes a core pull 310 and a tooth shaft 320. The tooth shaft 320 is arranged on the first mold mechanism 100. The tooth shaft 320 is rotatably sleeved outside the core pull 310 and is used to form the internal thread of the product 20. The core pull 310 is used to form the internal structure of the product 20 and can slide relative to the tooth shaft 320 along the axial direction of the tooth shaft 320. Specifically, one end of the core pull 310 is fixed on the cover plate 110, so that the core pull 310 and the cover plate 110 produce synchronous movement, and the core pull 310 extends into the mold cavity 190 to form the internal structure of the product 20. The tooth shaft 320 is rotatably connected with the mounting plate 120 and the first mold plate 130, so that the tooth shaft 320 can rotate around its own central axis. Of course, the tooth shaft 320 can also slide relative to the first mold plate 130. When the cover plate 110 slides relative to the mounting plate 120, the core pull 310 can slide relative to the tooth shaft 320. It can be understood that the first product 21 has an internal thread, so the first product 21 needs a tooth shaft 320 for molding; while the second product 22 does not have an internal thread, so the second product 22 does not need a tooth shaft 320 for molding.

[0048] Referring to FIG. 4 , FIG. 5 and FIG. 8 , in some embodiments, the threading mechanism 300 further includes a first gear 330, a second gear 340, a driving shaft 350 and a driving wheel 360. The driving shaft 350 is rotatably connected to the cover plate 110, and the driving wheel 360 and the second gear 340 are both fixedly sleeved on the driving shaft 350, so that the driving wheel 360 and the second gear 340 are arranged at intervals along the axial direction of the driving shaft 350. The driving wheel 360 can be a synchronous wheel, and a synchronous belt can be used to drive the driving wheel 360, so that the driving wheel 360 drives the driving shaft 350 and the second gear 340 to rotate. The first gear 330 is fixedly sleeved outside the tooth shaft 320, and the second gear 340 is meshed with the first gear 330. When the driving shaft 350 rotates, the first gear 330 is driven to rotate through the second gear 340, and then the tooth shaft 320 is rotated. The tooth shaft 320 is provided with an external thread. When the tooth shaft 320 rotates, the tooth shaft 320 can form the internal thread of the product 20. A recessed groove can be provided on the mounting plate 120, so that both the first gear 330 and the second gear 340 are accommodated in the recessed groove, so that the compactness of the structure of the injection mold 10 can be improved. In the process of rotating the tooth shaft 320 to form the internal thread of the product 20, the mounting plate 120 can be gradually moved away from the first template 130 through the pushing action of the elastic member 160, so that the mounting plate 120 drives the tooth shaft 320 to slide relative to the first template 130 and gradually withdraw from the product 20. When the internal thread of the product 20 is processed, the tooth shaft 320 can be completely withdrawn from the product 20.

[0049] Referring to FIG. 4 and FIG. 10 , in some embodiments, the core puller 310 includes a first core 311 and a second core 312, the first core 311 is sleeved outside the second core 312, the tooth shaft 320 is rotatably sleeved outside the first core 311, the end of the second core 312 close to the cavity 190 is located inside the first core 311, and the end of the second core 312 close to the cavity 190 and the end of the first core 311 close to the cavity 190 are separated by a set distance H. By sucking the first core 311 and the second core 312, the entire core puller 310 can form the convex column 202 in the sleeve 201 of the product 20 and the gap between the sleeve 201 and the convex column 202 at one time.

[0050] Referring to FIG. 4 and FIG. 9 , in some embodiments, the tooth shaft 320 includes a shaft portion 321 and a convex ring 322. The convex ring 322 is sleeved outside the shaft portion 321 and abuts against the first mold mechanism 100. Obviously, the outer diameter of the convex ring 322 is greater than the outer diameter of the shaft portion 321. The shaft portion 321 includes a first shaft segment 3211, a second shaft segment 3212 and a third shaft segment 3213. The second shaft segment 3212 is connected between the first shaft segment 3211 and the third shaft segment 3213. The first shaft segment 3211 and the second shaft segment 3212 are located on both sides of the convex ring 322. The third shaft segment 3213 is connected to one end of the second shaft segment 3212 away from the convex ring 322. The third shaft segment 3213 is provided with an external thread, so that the third shaft segment 3213 can form an internal thread of the product 20. Along the direction from the first shaft segment 3211 to the second shaft segment 3212, the cross-sectional size of the second shaft segment 3212 gradually decreases, so that the second shaft segment 3212 has a certain taper. Therefore, through the contact between the convex ring 322 and the first template 130, the tooth axis 320 can be well limited during the mold closing process, thereby improving the position and dimensional accuracy of the internal thread forming. At the same time, by setting the second shaft segment 3212 with a certain taper, during the process of forming the internal thread, the resistance of the tooth axis 320 to exit the product 20 can be reasonably reduced, thereby reducing the damage caused by the tooth axis 320 to the internal thread of the product 20 during the withdrawal process, and ultimately improving the molding quality of the product 20, and also facilitating the tooth axis 320 to quickly exit the product 20, thereby improving the processing efficiency of the product 20.

[0051] Therefore, by setting the tooth shaft 320 and the core pulling 310, the internal thread and the internal structure of the product 20 can be formed by the tooth shaft 320 and the core pulling 310 respectively, that is, the internal thread and the internal structure of the product 20 are formed at one time by the same injection mold 10, avoiding the product 20 from being processed by different equipment, 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.

[0052] Referring to FIG. 4 and FIG. 5 , in some embodiments, the second mold mechanism 200 includes a second mold plate 210, a base 220, and a positioning column 230. The second mold plate 210 and the first mold plate 130 are stacked on each other, and the second mold plate 210 can slide relative to the first mold plate 130, so that the entire second mold mechanism 200 can slide relative to the first mold mechanism 100. The second mold plate 210 and the first mold plate 130 are used to enclose the molding cavity 190. The base 220 is arranged on the side of the second mold plate 210 facing away from the first mold plate 130, so that the base 220 and the second mold plate 210 can be fixedly connected by bolt connection, so the base 220 and the second mold plate 210 can generate synchronous movement relative to the first mold plate 130. The base 220 and the second mold plate 210 enclose a receiving cavity 221. The positioning column 230 is located in the receiving cavity 221 , one end of the positioning column 230 is fixedly connected to the base 220 , and the other end of the positioning column 230 abuts against the second template 210 , so that the positioning column 230 provides a certain support to the second template 210 .

[0053] 11 , 12 and 13 , in some embodiments, the slide mechanism 400 includes a plurality of slide components 401 disposed around the same cavity 190 , that is, the external barbs and hole structures of the same product 20 are formed by the plurality of slide components 401 . The slide assembly 401 includes a shovel 410 and a slider 420. The relative sliding direction of the first mold mechanism 100 and the second mold mechanism 200 is taken as a reference direction, and the reference direction can also be understood as the axial direction of the tooth axis 320. The shovel 410 is fixedly connected to the first template 130 of the first mold mechanism 100, so that the shovel 410 is slidably connected to the second template 210 along the reference direction, the shovel 410 and the slider 420 are slidably connected in a direction at an acute angle to the reference direction, and the slider 420 is slidably connected to the second template 210 in a direction perpendicular to the reference direction. The slider 420 is used to form the external structure of the product 20; when the shovel 410 slides relative to the slider 420, the slider 420 gradually moves away from the cavity 190, that is, the slider 420 falls off the barb and hole structure on the outside of the product 20, thereby eliminating the interference of the slider 420 with the product 20, and finally the product 20 is smoothly taken out of the cavity 190 and smoothly demolded. The number of slide assemblies 401 disposed around the same cavity 190 may be four, that is, the number of slide assemblies 401 used to mold the same product 20 may be four. In other embodiments, the number of slide assemblies 401 used to mold the same product 20 may be two or three.

[0054] Referring to FIGS. 13 and 14, in some embodiments, the second template 210 includes a substrate 211 and a forming block 212, and the forming block 212 is detachably connected to the substrate 211, for example, the forming block 212 can be accommodated in a countersunk hole of the substrate 211. The forming block 212 is provided with a sliding cavity 2121, and the slider 420 is slidably matched with the sliding cavity 2121. Referring to FIGS. 13 and 14, for example, the sliding cavity 2121 is spaced apart from the end surface of the forming block 212, and the forming block 212 and the slider 420 are used to surround the forming cavity 190 to form the external structure of the product 20, and at this time, the sliding cavity 2121 can be understood as a tunnel-type cavity. Referring to FIG. 15 and FIG. 16, for another example, the sliding cavity 2121 penetrates the end surface of the forming block 212 facing the first mold mechanism 100, which can be understood as the sliding cavity 2121 being formed by the end surface of the forming block 212 facing the first mold mechanism 100 being recessed to a set depth, and the slider 420 is used to surround the forming cavity 190, and the forming block 212 does not directly participate in forming the external structure of the product 20. At this time, the sliding cavity 2121 can be understood as an open cavity. Therefore, according to the specific external structure of the product 20, the forming block 212 can be selected to have a tunnel-type cavity or an open cavity. For example, the tunnel-type cavity can process the first product 21, and the open cavity can process the second product 22.

[0055] Referring to FIG. 16 , in some embodiments, the extension tracks of any two sliding cavities 2121 are not on the same straight line. In this way, on the one hand, the slider 420 can be smoothly and accurately moved to the specified position, thereby improving the molding accuracy of the external structure of the product 20. On the other hand, the multiple sliders 420 can reduce the interference resistance in the process of exiting the sliding cavity 2121, avoiding the slider 420 from damaging the external structure of the product 20, improving the molding quality of the product 20, and allowing the slider 420 to quickly exit the sliding cavity 2121, thereby reducing the mold opening time and improving the production efficiency of the product 20.

[0056] Referring to FIG. 13 and FIG. 14 , in some embodiments, a guide cavity 421 is provided on the slider 420, and the shovel 410 is slidably matched with the guide cavity 421. The extension direction of the guide cavity 421 is set at an acute angle to the reference direction, and the distance from the guide cavity 421 to the mold cavity 190 gradually increases from the first mold mechanism 100 to the second mold mechanism 200 along the reference direction. Therefore, during the sliding process of the second mold mechanism 200 relative to the first mold mechanism 100, the shovel 410 can drive the slider 420 to gradually exit the guide cavity 421 in a direction perpendicular to the reference direction.

[0057] Referring to FIG. 13 and FIG. 14 , the shovel 410 includes a fixing portion 411 and a matching portion 412. The fixing portion 411 has a first inclined surface 4111, and the matching portion 412 is protrudingly arranged on the first inclined surface 4111. The slider 420 has a second inclined surface 422, and the second inclined surface 422 is in contact with the first inclined surface 4111. The guide cavity 421 includes a first cavity 4211 and a second cavity 4212, and the first cavity 4211 and the second cavity 4212 are connected to each other. The inner wall surface of the first cavity 4211 includes a side wall surface arranged parallel to the first inclined surface 4111, and the second cavity 4212 passes through the middle of the side wall surface and the second inclined surface 422, so that the second cavity 4212 maintains a certain distance from both ends of the side wall surface, so the cross section of the guide cavity 421 is roughly T-shaped. The matching portion 412 matches with the first cavity 4211 and the second cavity 4212, so that the cross section of the matching portion 412 is also roughly T-shaped. The first inclined surface 4111 and the second inclined surface 422 are both in the same extension direction as the guide cavity 421. In view of the special structure of the guide cavity 421, when the matching portion 412 is matched with the first cavity 4211 and the second cavity 4212, the matching portion 412 can only be separated from the guide cavity 421 along the extension direction of the guide cavity 421, and cannot be separated from the guide cavity 421 along other directions.

[0058] During the demoulding process, the first template 130 can be fixed, so that the entire second mold mechanism 200 gradually slides away from the first template 130. At this time, due to the action of the guide cavity 421, the matching portion 412 of the shovel 410 will generate a component force along the vertical reference direction on the slider 420, and the component force will push the slider 420 to gradually withdraw from the sliding cavity 2121 to move away from the product 20. Due to the action of the first inclined surface 4111 and the second inclined surface 422, the shovel 410 will provide sufficient avoidance space for the slider 420 during the movement, so that the slider 420 can smoothly withdraw from the sliding cavity 2121 to separate from the product 20.

[0059] Referring to FIG. 3, FIG. 4 and FIG. 7, in some embodiments, the push mechanism 500 includes a push plate 510 and a push pin 520. The push plate 510 is received in the receiving cavity 221 of the base 220. The positioning column 230 is slidably disposed in the push plate 510, so that the push plate 510 can slide relative to the positioning column 230. The positioning column 230 plays a good guiding role in the sliding of the push plate 510, which can improve the sliding accuracy and smoothness of the push plate 510. The push pin 520 is protrudingly disposed on the push plate 510. The push pin 520 can be slidably disposed in the second mold plate 210 and extend into the mold cavity 190 to abut against the product 20. When the push plate 510 slides relative to the positioning column 230, the push plate 510 can move closer to or away from the second mold plate 210.

[0060] Referring to FIG. 3 , FIG. 4 and FIG. 7 , in some embodiments, the push mechanism 500 further includes a limiting column 530 and an elastic body 540, wherein the limiting column 530 is fixedly connected to the push plate 510, and the limiting column 530 is slidably disposed in the second template 210. The elastic body 540 is located in the receiving cavity 221, and the elastic member 160 is sleeved on the limiting column 530, and the elastic member 160 abuts against the push plate 510 and the second template 210. By providing the limiting column 530, on the one hand, when the push plate 510 slides relative to the positioning column 230, the limiting column 530 will slide relative to the second template 210, and the limiting column 530 can also guide the sliding of the push plate 510 to a certain extent, further improving the sliding accuracy and smoothness of the push plate 510. On the other hand, the limiting column 530 can constrain the deformation of the elastic body 540, ensuring that the elastic force generated by the elastic body 540 extends along the axial direction of the limiting column 530.

[0061] After the slider 420 of the slide mechanism 400 is separated from the product 20, the push plate 510 can move close to the second template 210, and the elastic body 540 stores energy, so that the push plate 510 drives the ejector pin 520 to eject the product 20 from the cavity 190, and finally realizes the demoulding of the product 20. When the product 20 is completely demoulded, the force on the push plate 510 is cancelled, and the elastic body 540 releases energy, so the elastic body 540 will push the push plate 510 to automatically return to the initial position, so the elastic body 540 can play the role of automatic reset of the push plate 510.

[0062] Since the slide mechanism 400 includes a plurality of slide components 401 arranged around the same cavity 190, the plurality of slide components 401 can process and mold the entire external structure of the product 20 at one time. Therefore, the external structure of the product 20 is molded at one time by the same injection mold 10, thereby effectively avoiding the external structure of the product 20 from being molded by multiple different devices. This reduces the transfer time and processing time of the product 20 between different devices, thereby improving the production efficiency of the injection mold 10 for the product 20.

[0063] The following describes the working principle of injection mold 10 mold opening:

[0064] In the first step, the cover plate 110 is fixed, so that the mounting plate 120, the first template 130 and the entire second mold mechanism 200 move away from the cover plate 110. When the first cap portion 142 abuts against the first step surface 113, the distance between the cover plate 110 and the mounting plate 120 increases to the maximum, the cover plate 110 and the mounting plate 120 stop sliding relative to each other, and the core puller 310 completely detaches from the product 20. During the relative movement of the cover plate 110 and the mounting plate 120, the drive shaft 350 can drive the tooth shaft 320 to rotate to process the internal thread of the product 20. At the same time, under the pushing action of the elastic member 160, the mounting plate 120 will slide relative to the first template 130, so that the tooth shaft 320 will also slide relative to the first template 130 during the rotation relative to the first template 130, so that the tooth shaft 320 can form the internal thread while withdrawing from the product 20. When the second cap portion 152 abuts against the second step surface 133, the distance between the first template 130 and the mounting plate 120 increases to the maximum, and the first template 130 and the mounting plate 120 stop sliding relative to each other. The tooth axis 320 will completely withdraw from the product 20. Therefore, since the core puller 310 withdraws from the product 20 earlier than the tooth axis 320, it is avoided that both withdraw from the product 20 at the same time, which can reduce the withdrawal resistance of the tooth axis 320 on the one hand, and reduce the interference of the core puller 310 on the tooth axis 320 on the other hand, thereby further reducing the demoulding time of the product 20, thereby improving the production efficiency of the product 20.

[0065] In the second step, the first template 130 is fixed, and the second mold mechanism 200 slides relative to the first template 130, so that the shovel 410 slides relative to the second template 210 and the slider 420 at the same time, and then the shovel 410 drives the slider 420 to slide relative to the sliding cavity 2121 to move away from the product 20, that is, the slider 420 gradually withdraws from the external structures such as the barbs and holes of the product 20. When the slider 420 completely withdraws from the product 20, the sliding of the second mold mechanism 200 relative to the first template 130 stops.

[0066] The third step is to push the push plate 510 to move closer to the second template 210. The push plate 510 will drive the ejector pin 520 to separate the product 20 from the cavity 190, and finally achieve complete demolding of the product 20.

[0067] 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.

[0068] 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 first mold mechanism is provided with a glue injection hole; A second mold mechanism, which, together with the first mold mechanism, forms a mold cavity connected to the glue injection hole; and The thread-twisting mechanism includes a core-pulling device and a thread shaft, wherein the thread shaft is arranged on the first mold mechanism, the thread shaft is rotatably sleeved outside the core-pulling device and is used for forming the internal thread of the product, the core-pulling device is used for forming the internal structure of the product and can slide relative to the thread shaft along the axial direction of the thread shaft.

2. The injection mold according to claim 1, characterized in that: The first mold mechanism includes a cover plate, a mounting plate and a first template. The mounting plate is located between the cover plate and the first template and is used to install the tooth axis. Along the axial direction of the tooth axis, the mounting plate is slidingly connected to the cover plate and the first template. The tooth axis is rotatably connected to the first template. One end of the core pulling is fixedly connected to the cover plate.

3. The injection mold according to claim 2, characterized in that: The first mold mechanism also includes a first fastener, which includes a first rod portion and a first cap portion which are coaxially arranged, the first rod portion protrudingly arranged on the end surface of the first cap portion, and the cross-sectional size of the first rod portion is smaller than the cross-sectional size of the first cap portion; a first large hole and a first small hole are opened on the cover plate, the aperture of the first large hole is larger than the aperture of the first small hole, and a first step surface is provided at the connection between the first large hole and the first small hole; the first rod portion is inserted into the first small hole and fixedly connected to the mounting plate; when the mold is closed, the first cap portion is located in the first large hole and is spaced apart from the first step surface; when the mold is opened, the first cap portion can abut against the first step surface.

4. The injection mold according to claim 2, characterized in that: The first mold mechanism also includes a second fastener, which includes a coaxially arranged second rod portion and a second cap portion, the second rod portion protrudingly arranged on the end surface of the second cap portion, and the cross-sectional size of the second rod portion is smaller than the cross-sectional size of the second cap portion; a second large hole and a second small hole are opened on the first template, the aperture of the second large hole is larger than the aperture of the second small hole, and a second step surface is provided at the connection between the second large hole and the second small hole; the second rod portion is inserted into the second small hole and fixedly connected to the mounting plate; when the mold is closed, the second cap portion is located in the second large hole and is spaced apart from the second step surface; when the mold is opened, the second cap portion can abut against the second step surface.

5. The injection mold according to claim 2, characterized in that: The first mold mechanism further includes an elastic member. A receiving hole is provided in the first mold plate and / or the mounting plate. The elastic member is received in the receiving hole and abuts against the first mold plate and the mounting plate.

6. The injection mold according to claim 2, characterized in that: The first mold mechanism further includes a slide bar, which is fixedly connected to the cover plate and slidably penetrates the mounting plate, the first mold plate and the second mold mechanism.

7. The injection mold according to claim 1, characterized in that: The threading mechanism further includes a first gear and a second gear. Both the first gear and the second gear are rotatably arranged on the first mold mechanism. The first gear is fixedly sleeved outside the threading shaft, and the second gear is meshed with the first gear.

8. The injection mold according to claim 7, characterized in that: The thread-cutting mechanism further comprises a driving shaft and a driving wheel. The driving shaft is rotatably connected to the first die mechanism. The driving wheel and the second gear are both arranged at intervals and fixedly sleeved on the driving shaft.

9. The injection mold according to claim 1, characterized in that: The core pulling device includes a first core and a second core, the first core sleeve is arranged outside the second core, the tooth axis rotating sleeve is arranged outside the first core, the end of the second core close to the mold cavity is located in the first core, and the end of the second core close to the mold cavity is separated from the end of the first core close to the mold cavity by a set distance.

10. The injection mold according to claim 1, characterized in that: The tooth shaft includes a shaft portion and a convex ring, the convex ring is arranged outside the shaft portion and abuts against the first mold mechanism, the shaft portion includes a first shaft segment, a second shaft segment and a third shaft segment, the first shaft segment and the second shaft segment are located on both sides of the convex ring, the third shaft segment is connected to the end of the second shaft segment away from the convex ring and is used for forming the internal thread of the product, and the cross-sectional size of the second shaft segment gradually decreases along the direction from the first shaft segment to the second shaft segment.

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