Injection mold

Abstract

The invention discloses an injection mold, and relates to the field of zipper tooth manufacturing equipment. The injection mold comprises an upper mold, a lower mold, a first auxiliary mold and a second auxiliary mold, the upper mold and the lower mold are mutually buckled to define a zipper tooth injection molding cavity extending in the first direction; the first auxiliary mold is provided with a first pin groove part and a first plugging part which can be switched to one end of the upper mold in the first direction, and the second auxiliary mold is provided with a second pin groove part and a second plugging part which can be switched to one end of the lower mold in the first direction; when the first pin groove part and the second pin groove part are switched to one end of the upper mold and one end of the lower mold respectively, the first pin groove part and the second pin groove part are buckled with each other to define a bolt injection molding cavity, and the bolt injection molding cavity communicates with the zipper tooth injection molding cavity; and when the first plugging part and the second plugging part are switched to one end of the upper mold and one end of the lower mold respectively, the zipper tooth injection molding cavity is sealed by the first plugging part and the second plugging part. The problem that bolts and zipper teeth cannot be injection-molded at the same time is solved.

Description

Technical Field

[0001] This application belongs to the technical field of chain tooth manufacturing equipment, and particularly relates to an injection mold. Background Art

[0002] A pin is provided at the end of the chain tooth along its length direction. In the related art, an injection mold is first used to inject the chain tooth. After the chain tooth injection is completed, the pin is then injected at the end of the chain tooth. However, this injection method cannot inject the pin and the chain tooth together, which not only affects the injection efficiency but also affects the positional accuracy between the pin and the chain tooth due to asynchronous injection. Summary of the Invention

[0003] The purpose of the embodiments of this application is to provide an injection mold that can solve problems such as the inability to inject the pin and the chain tooth simultaneously.

[0004] To solve the above technical problems, this application is implemented as follows: The embodiments of this application provide an injection mold, including: an upper mold, a lower mold, a first auxiliary mold, and a second auxiliary mold; The upper mold and the lower mold can be mutually buckled to enclose a chain tooth injection cavity extending in a first direction; The first auxiliary mold is provided with a first pin groove part and a first blocking part that can be respectively switched to one end of the upper mold along the first direction, and the second auxiliary mold is provided with a second pin groove part and a second blocking part that can be respectively switched to one end of the lower mold along the first direction; When the first pin groove part and the second pin groove part are respectively switched to one end of the upper mold and the lower mold, the first pin groove part and the second pin groove part are mutually buckled to enclose a pin injection cavity, and the pin injection cavity is communicated with the chain tooth injection cavity; When the first blocking part and the second blocking part are respectively switched to one end of the upper mold and the lower mold, the first blocking part and the second blocking part close the chain tooth injection cavity.

[0005] In the injection mold according to the embodiment of the present application, when it is necessary to inject the chain teeth and the pins, the first pin groove portion of the first auxiliary mold can be switched to the end of the upper mold, and the second pin groove portion of the second auxiliary mold can be switched to the end of the lower mold, so that the first pin groove portion and the second pin groove portion can be engaged with each other to form a pin injection cavity. At the same time, the upper mold and the lower mold can be engaged with each other to form a chain tooth injection cavity, and the pin injection cavity and the chain tooth injection cavity are communicated with each other. In this way, the injection material can enter the chain tooth injection cavity and the pin injection cavity, so that the pins at one end of the chain teeth can be injected simultaneously; when it is necessary to extend the chain teeth and inject the chain teeth again, the first blocking portion of the first auxiliary mold can be switched to the end of the upper mold, and the second blocking portion of the second auxiliary mold can be switched to the end of the lower mold, so that the first blocking portion and the second blocking portion respectively close the chain tooth injection cavity. In this way, the injection material can be injected into the chain tooth injection cavity between the upper mold and the lower mold again to inject and form another section of chain teeth, realizing the extension of the chain teeth; and so on, repeating the above process of injecting the chain teeth alone, more sections of chain teeth can be formed, realizing the continuous extension of the chain teeth, so that the chain teeth of the required length can be injected. Compared with the chain tooth injection mold in the related art, the injection mold in the embodiment of the present application can inject chain teeth of different lengths according to actual needs, so as to adapt to the needs in different scenarios and improve the applicability of the injection mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 is a disassembled schematic view of the injection mold disclosed in the embodiment of the present application; Figure 2 is a disassembled schematic view of the upper mold and the first auxiliary mold disclosed in the embodiment of the present application; Figure 3 is a structural schematic view of the first auxiliary mold disclosed in the embodiment of the present application; Figure 4 is a disassembled schematic view of the lower mold, the second auxiliary mold and the first blocking assembly disclosed in the embodiment of the present application; Figure 5 is a structural schematic view of the second auxiliary mold disclosed in the embodiment of the present application; Figure 6 is a schematic view of the state where the first pin groove portion is switched to one end of the upper mold in the embodiment of the present application; Figure 7 is a schematic view of the state where the first blocking portion is switched to one end of the upper mold in the embodiment of the present application; Figure 8 is a schematic view of the chain teeth and pins formed by the first mold injection in the embodiment of the present application; Figure 9 is a schematic view of the chain teeth and pins formed by the first mold and the second mold injection in the embodiment of the present application; Figure 10Schematic diagram of the tooth links, pins and stoppers formed by injection molding of the first mold, second mold and third mold disclosed in the embodiments of the present application.

[0007] Description of reference numerals: 10 - upper mold; 11 - first tooth link groove; 12 - first slide rail; 13 - injection runner; 131 - opening; 14 - first stopper groove 20 - lower mold; 21 - second tooth link groove; 22 - second slide rail; 23 - second stopper groove 30 - first auxiliary mold; 30a - first mold core; 30b - first driving member; 31 - first pin groove portion; 311 - first avoidance groove; 32 - first plugging portion; 321 - first receiving groove; 322 - first baffle; 323 - third avoidance groove; 33 - first chute 40 - second auxiliary mold; 40a - second mold core; 40b - second driving member; 41 - second pin groove portion; 411 - second avoidance groove; 42 - second plugging portion; 421 - second receiving groove; 422 - second baffle; 423 - fourth avoidance groove; 43 - second chute 50 - first plugging assembly; 51 - first plugging member; 52 - third driving member. Detailed implementation manners

[0008] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0009] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. generally belong to the same category, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally represents an "or" relationship between the associated objects before and after.

[0010] Next, the embodiments of the present application will be described in detail in conjunction with the accompanying drawings through specific embodiments and their application scenarios.

[0011] Refer to Figures 1 to 10, embodiments of the present application disclose an injection mold for injecting chain teeth, pins, etc. The disclosed injection mold includes an upper mold 10, a lower mold 30, a first auxiliary mold 30, and a second auxiliary mold 40.

[0012] The upper mold 10 and the lower mold 30 cooperate to inject chain teeth. Optionally, the upper mold 10 and the lower mold 30 are arranged in the up-down direction, and the upper mold 10 and the lower mold 30 can be relatively close to each other and fastened to facilitate the injection of chain teeth, or relatively separated to facilitate the demolding of the chain teeth.

[0013] To form the chain teeth, the surface of the upper mold 10 facing the lower mold 30 (e.g., the lower surface) may be provided with a first chain tooth groove 11 extending in a first direction; correspondingly, the surface of the lower mold 30 facing the upper mold 10 (e.g., the upper surface) may be provided with a second chain tooth groove 21 extending in the first direction. When the upper mold 10 and the lower mold 30 are fastened to each other, the first chain tooth groove 11 and the second chain tooth groove 21 are fastened to each other to form a chain tooth injection cavity extending in the first direction between the upper mold 10 and the lower mold 30. Thus, during the injection process, injection material can be injected into the chain tooth injection cavity, and the chain teeth can be formed after the injection material cools. Optionally, the first direction is perpendicular to the setting direction of the upper mold 10 and the lower mold 30. For example, when the upper mold 10 and the lower mold 30 are arranged in the up-down direction, the first direction may be the left-right direction or the front-back direction, etc.

[0014] Considering that pins also need to be injected during the injection process of the chain teeth, embodiments of the present application can form pins through the mutual cooperation of the first auxiliary mold 30 and the second auxiliary mold 40. Among them, the first auxiliary mold 30 may be provided with a first pin groove portion 31 and a first blocking portion 32, and the first pin groove portion 31 and the first blocking portion 32 can be respectively switched to one end of the upper mold 10 in the first direction to facilitate the docking of the first pin groove portion 31 or the first blocking portion 32 with one end of the upper mold 10. It should be noted here that the first pin groove portion 31 can be a partial structure for injecting pins, and the function of the first blocking portion 32 is to block the area of the chain tooth injection cavity located in the upper mold 10 to prevent the injection material from leaking from the upper mold 10.

[0015] Correspondingly, the second auxiliary mold 40 may be provided with a second pin groove portion 41 and a second blocking portion 42, and the second pin groove portion 41 and the second blocking portion 42 can be respectively switched to one end of the lower mold 30 in the first direction to facilitate the docking of the second pin groove portion 41 or the second blocking portion 42 with one end of the lower mold 30. It should be noted here that the second pin groove portion 41 can be another partial structure for injecting pins, and the function of the second blocking portion 42 is to block the area of the chain tooth injection cavity located in the lower mold 30 to prevent the injection material from leaking from the lower mold 30.

[0016] Based on the above-mentioned arrangement, in the case of injection molding chain teeth and latches, the first pin groove portion 31 is switched to one end of the upper mold 10, and the second pin groove portion 41 is switched to one end of the lower mold 30. Moreover, since the upper mold 10 and the lower mold 30 are combined with each other, the first pin groove portion 31 and the second pin groove portion 41 are interlocked with each other to form a latch injection cavity, and the latch injection cavity is connected to the chain tooth injection cavity. In this way, the injection molding material in the chain tooth injection cavity can flow into the latch injection cavity, thereby realizing the injection molding of the latch.

[0017] When the chain teeth are injected individually, the first sealing part 51 is switched to one end of the upper mold 10, and the second sealing part is switched to one end of the lower mold 30. Since the upper mold 10 and the lower mold 30 are combined with each other, the first sealing part 32 and the second sealing part 42 are combined with each other, and the two together block the port at one end of the chain tooth injection cavity to close the chain tooth injection cavity and prevent leakage of the injection material.

[0018] It should be noted here that when the first mold link tooth is injected, the link tooth and the pin located at one end of the first mold link tooth can be injected simultaneously to form the first mold link tooth with the pin. During this process, the first pin groove portion 31 and the second pin groove portion 41 can be switched to one end of the upper mold 10 and the lower mold 30 respectively. When the link tooth needs to be extended, the second mold link tooth can be injected again at the end of the first mold link tooth away from the pin to extend the link tooth. In this case, the first blocking portion 32 and the second blocking portion 42 can be switched to one end of the upper mold 10 and the lower mold 30 respectively, and one end of the first mold link tooth can be located between the first auxiliary mold 30 and the second auxiliary mold 40, so that one end of the first mold link tooth is arranged relative to the second mold link tooth to be injected between the upper mold 10 and the lower mold 30. Similarly, the injection mold number of the link tooth can be increased according to actual needs until the link tooth length reaches the required length.

[0019] Compared with the chain tooth injection mold in the related art, the injection mold in the embodiment of the present application can inject chain teeth of different lengths according to actual needs, thereby adapting to the needs of different scenarios and improving the applicability of the injection mold.

[0020] In some embodiments, the first auxiliary mold 30 is movably or rotatably disposed at one end of the upper mold 10 along the first direction. Alternatively, the first auxiliary mold 30 can be connected to the end surface of the upper mold 10 along the first direction, or to the surface of the upper mold 10 facing the lower mold 30, which can be set according to actual needs.

[0021] Optionally, the movement path of the first auxiliary mold 30 relative to the upper mold 10 can be a straight line or a curve; the rotation mode of the first auxiliary mold 30 relative to the upper mold 10 can be rotation in a plane or flipping in space.

[0022] Accordingly, the second auxiliary mold 40 is movably or rotatably disposed at one end of the lower mold 30 along the first direction. Optionally, the second auxiliary mold 40 may be connected to the end face of one end of the lower mold 30 along the first direction, or connected to the surface of the lower mold 30 facing the upper mold 10, which may be specifically set according to actual requirements.

[0023] Optionally, the movement path of the second auxiliary mold 40 relative to the lower mold 30 may be a straight line or a curve; the rotation mode of the second auxiliary mold 40 relative to the lower mold 30 may be rotation in a plane or flipping in space.

[0024] Wherein, one of the end of the upper mold 10 along the first direction and the first auxiliary mold 30 may be provided with a first slide rail 12 extending along the second direction, and the other is provided with a first chute 33, and the first chute 33 is slidably connected to the first slide rail 12; one of the end of the lower mold 20 along the first direction and the second auxiliary mold 40 may be provided with a second slide rail 22 extending along the second direction, and the other is provided with a second chute 43, and the second chute 43 is slidably connected to the second slide rail 22.

[0025] In some more specific embodiments, the first auxiliary mold 30 may be slidably connected to the surface of the upper mold 10 facing the lower mold 30 in a straight line direction. Specifically, the surface of one end of the upper mold 10 along the first direction and facing the lower mold 30 may be provided with a first slide rail 12 extending along the second direction. Accordingly, the first auxiliary mold 30 may be provided with a first chute 33, and the first chute 33 is slidably connected to the first slide rail 12. Based on this, the first auxiliary mold 30 can be slid relative to the upper mold 10 along the second direction, so as to facilitate switching the first pin slot portion 31 or the first plugging portion 32 to a position docked with one end of the upper mold 10.

[0026] Similarly, the second auxiliary mold 40 may be slidably connected to the surface of the lower mold 30 facing the upper mold 10 in a straight line direction. Specifically, the surface of one end of the lower mold 30 along the first direction and facing the upper mold 10 may be provided with a second slide rail 22 extending along the second direction. Accordingly, the second auxiliary mold 40 may be provided with a second chute 43, and the second chute 43 is slidably connected to the first slide rail. Based on this, the second auxiliary mold 40 can be slid relative to the lower mold 30 along the second direction, so as to facilitate switching the second pin slot portion 41 or the second plugging portion 42 to a position docked with one end of the lower mold 30.

[0027] Wherein, the first direction, the second direction and the setting directions of the upper mold 10 and the lower mold 30 are perpendicular to each other in pairs. Exemplarily, the upper mold 10 and the lower mold 30 may be arranged in the up-down direction, the first direction may be the left-right direction, and the second direction may be the front-back direction.

[0028] To achieve the switching of different positions of the first auxiliary mold 30, the first auxiliary mold 30 may include a first mold core 30a and a first driving member 30b. Among them, the first mold core 30a may be provided with a first pin groove portion 31 and a first plugging portion 32, and the first driving member 30b is connected to the first mold core 30a and is used to drive the first mold core 30a so that the first pin groove portion 31 and the first plugging portion 32 are switched relative to the upper mold 10.

[0029] Exemplarily, when the first auxiliary mold 30 moves relative to the upper mold 10, the first driving member 30b may be a translational driving member to drive the first mold core 30a to move relative to the upper mold 10; when the first auxiliary mold 30 rotates relative to the upper mold 10, the first driving member 30b may be a rotational driving member to drive the first mold core 30a to rotate relative to the upper mold 10.

[0030] In some more specific embodiments, the first pin groove portion 31 and the first plugging portion 32 may be arranged along a second direction, and the first driving member 30b may be a linear translational driving member. By the linear translational driving member, the first mold core 30a can be driven to move along the second direction so that the first pin groove portion 31 or the first plugging portion 32 is docked with one end of the upper mold 10.

[0031] To achieve the switching of different positions of the second auxiliary mold 40, the second auxiliary mold 40 may include a second mold core 40a and a second driving member 40b. Among them, the second mold core 40a may be provided with a second pin groove portion 41 and a second plugging portion 42, and the second driving member 40b is connected to the second mold core 40a and is used to drive the second mold core 40a so that the second pin groove portion 41 and the second plugging portion 42 are switched relative to the lower mold 30.

[0032] Exemplarily, when the second auxiliary mold 40 moves relative to the lower mold 30, the second driving member 40b may be a translational driving member to drive the second mold core 40a to move relative to the lower mold 30; when the second auxiliary mold 40 rotates relative to the lower mold 30, the second driving member 40b may be a rotational driving member to drive the second mold core 40a to rotate relative to the lower mold 30.

[0033] In some more specific embodiments, the second pin groove portion 41 and the second plugging portion 42 may be arranged along the second direction, and the second driving member 40b may be a linear translational driving member. By the linear translational driving member, the second mold core 40a can be driven to move along the second direction so that the second pin groove portion 41 or the second plugging portion 42 is docked with one end of the lower mold 30.

[0034] Optionally, both the first driving member 30b and the second driving member 40b may be pneumatic driving members (such as cylinders, etc.), hydraulic driving members (such as hydraulic cylinders, etc.) or electric driving members (such as electric cylinders, etc.). Of course, other forms are also possible and are not specifically limited here.

[0035] When it is necessary to inject the next mold chain teeth on the basis of the previous mold chain teeth, the injection mold in the embodiment of the present application can accommodate the tail end of the previous mold chain teeth, so that the tail end of the previous mold chain teeth can be butted against the head end of the next mold chain teeth, so as to form chain teeth with the required length at the edge of the chain belt or fabric.

[0036] Based on the above situation, in the embodiment of the present application, the surface of the first blocking portion 32 facing the second blocking portion 42 may be provided with a first receiving groove 321 extending in the first direction. Correspondingly, the surface of the second blocking portion 42 facing the first blocking portion 32 may be provided with a second receiving groove 421 extending in the first direction. In this way, in the case of injecting the next mold chain teeth, the first blocking portion 32 and the second blocking portion 42 are respectively switched to one end of the upper mold 10 and the lower mold 20, so that the first blocking portion 32 and the second blocking portion 42 are combined with each other, and the first receiving groove 321 and the second receiving groove 421 are buckled with each other to form a chain tooth receiving cavity. Thus, the tail end of the chain teeth of the previous mold can be accommodated through the chain tooth receiving cavity, and the tail end of the previous mold chain teeth can be limited in the direction perpendicular to the first direction to ensure the position accuracy of the tail end of the previous mold chain teeth.

[0037] In addition, during the process of injecting the next mold chain teeth, it is necessary to block the end of the chain tooth injection cavity. Based on this, the end of the first receiving groove 321 close to the upper mold 10 may be provided with a first baffle 322. Correspondingly, the end of the second receiving groove 421 close to the lower mold 30 may be provided with a second baffle 422. In this way, in the case of injecting the next mold chain teeth, the first blocking portion 32 and the second blocking portion 42 are respectively switched to one end of the upper mold 10 and the lower mold 20, so that the first blocking portion 32 and the second blocking portion 42 are combined with each other, and the first baffle 322 and the second baffle 422 are butted against each other, thereby blocking the port of the chain tooth injection cavity to close the chain tooth injection cavity and prevent the injection material from leaking.

[0038] It should be noted here that the thickness dimensions of the first baffle 322 and the second baffle 422 are both smaller than the tooth pitch of the chain teeth. On the one hand, it can achieve blocking, and on the other hand, it will not interfere with the chain teeth.

[0039] Considering that a core wire is also passed through the inside of the chain teeth and the pins, during the process of injecting the chain teeth and the pins, it is also necessary to consider how to avoid the core wire. Based on this, in the embodiment of the present application, the first pin groove portion 31 may be provided with a first avoidance groove 311 extending in the first direction, and the second pin groove portion 41 may be provided with a second avoidance groove 411 extending in the first direction; the first blocking portion 32 may be provided with a third avoidance groove 323 extending in the first direction, and correspondingly, the second blocking portion 42 may be provided with a fourth avoidance groove 423 extending in the first direction.

[0040] Based on the above settings, in the case of injection molding the chain teeth and pins, the first pin groove portion 31 and the second pin groove portion 41 are respectively switched to one end of the upper mold 10 and the lower mold 20, so that the first pin groove portion 31 and the second pin groove portion 41 are respectively docked with the upper mold 10 and the lower mold 30, and a first avoidance channel for threading the core wire is formed between the first avoidance groove 311 of the first pin groove portion 31 and the second avoidance groove 411 of the second pin groove portion 41. This first avoidance channel can be communicated with the pin injection cavity. In this way, the core wire can be connected to the pin formed by injection molding.

[0041] In the case of injection molding the chain teeth, the first blocking portion 32 and the second blocking portion 42 are respectively switched to one end of the upper mold 10 and the lower mold 20, so that the first blocking portion 32 and the second blocking portion 42 are respectively docked with the upper mold 10 and the lower mold 30, and a second avoidance channel for threading the core wire is formed between the third avoidance groove 323 of the first blocking portion 32 and the fourth avoidance groove 423 of the second blocking portion 42. This second avoidance channel can be communicated with the chain tooth accommodation cavity. In this way, the core wire can be connected to the chain tooth formed by injection molding.

[0042] Optionally, the third avoidance groove 323 can be opened on the first baffle 322, and the fourth avoidance groove 423 can be opened on the second baffle 422.

[0043] In some embodiments, the pin injection cavity can include a main runner, a plurality of branch runners, and a plurality of cavity units for injection molding pins of different shapes. Among them, the surface of the first pin groove portion 31 facing the second pin groove portion 41 can be provided with a plurality of first groove units, and the surface of the second pin groove portion 41 facing the first pin groove portion 31 can be provided with a plurality of second groove units. The plurality of first groove units and the plurality of second groove units are respectively buckled to form a plurality of cavity units.

[0044] Exemplarily, the plurality of cavity units can include a square pin cavity unit, a long pin cavity unit, etc. Of course, they can also be other shapes, which are not specifically limited here.

[0045] In the case of injection molding the chain teeth and pins, the first pin groove portion 31 and the second pin groove portion 41 are respectively switched to one end of the upper mold 10 and the lower mold 20, so that one end of the main runner is communicated with the chain tooth injection cavity, and one end of each of the plurality of branch runners is respectively communicated with the other end of the main runner, and the other end of each is respectively communicated with the plurality of cavity units. Based on this setting, the injection molding material in the chain tooth injection cavity can be respectively conveyed to the plurality of branch runners via the main runner, and respectively conveyed to the plurality of cavity units through the plurality of branch runners, so as to facilitate the simultaneous injection molding of a plurality of pins.

[0046] Among them, the surface of the first pin slot portion 31 facing the second pin slot portion 41 may be provided with a first main slot and a plurality of first branch slots. Correspondingly, the surface of the second pin slot portion 41 facing the first pin slot portion 31 may be provided with a second main slot and a plurality of second branch slots. In this way, the first main slot and the second main slot can be engaged with each other to form a main runner, and the plurality of first branch slots and the plurality of second branch slots can be engaged with each other to form a plurality of branch runners.

[0047] In some embodiments, the pin injection cavity may further include a slideway, and the slideway is correspondingly arranged with at least a part of the plurality of branch runners.

[0048] Moreover, the injection mold may further include a first blocking component 50. Through the first blocking component 50, at least a part of the plurality of branch runners can be blocked, so that injection material can be injected into a part of the cavity units while no injection material is provided for another part of the cavity units.

[0049] The first blocking component 50 may include a first blocking member 51 and a third driving member 52. Among them, the third driving member 52 is arranged on the first auxiliary mold 30 or the second auxiliary mold 40 and is connected to the first blocking member 51, and is used for driving the first blocking member 51 to move into the slideway and blocking at least a part of the branch runners through the first blocking member 51, or driving the first blocking member 51 to move out of the slideway to release the blocking of at least a part of the branch runners.

[0050] Based on the above settings, the cavity units into which the injection material is injected can be adjusted according to actual requirements.

[0051] In some embodiments, the upper mold 10 may be provided with an injection runner 13 extending in the first direction to convey injection material to the tooth link injection cavity through the injection runner 13. In addition, an opening 131 may be provided at one end of the injection runner 13 facing away from the first auxiliary mold 30.

[0052] Furthermore, the injection mold may further include a second blocking component. The second blocking component may include a second blocking member and a fourth driving member. The second blocking member extends into the injection runner 13 from the opening. The fourth driving member is connected to the second blocking member and is used for driving the second blocking member to move along the first direction to adjust the length space of the injection runner 13 blocked.

[0053] It should be noted here that the length dimension of the second blocking member moving into the injection runner 13 through the opening 131 can affect the length dimension of the injection runner 13 blocked, thereby affecting the injection length of the tooth link. For example, if the length dimension of the second blocking member moving into the injection runner 13 is relatively large, resulting in a relatively large dimension of the injection runner 13 blocked, the length dimension of the tooth link injection cavity into which the injection material can enter is reduced, thereby resulting in a reduction in the injection length of the tooth link; on the contrary, the injection length of the tooth link increases.

[0054] In some embodiments, a first stopper groove 14 may be provided at one end of the upper mold 10 facing away from the first auxiliary mold 30. Correspondingly, a second stopper groove 23 may be provided at one end of the lower mold 30 facing away from the second auxiliary mold 40. When the upper mold 10 and the lower mold 20 are engaged with each other, the first stopper groove 14 and the second stopper groove 23 are engaged with each other to form a stopper injection cavity communicating with the injection runner 13. The second plugging member can adjust the communication or blocking state between the stopper injection cavity and the tooth link injection cavity by moving in the first direction. Based on this, when it is necessary to inject the tooth link alone, the stopper injection cavity can be blocked from the tooth link injection cavity to prevent the injection material from entering the stopper injection cavity; when it is necessary to inject the stopper, the stopper injection cavity can be communicated with the tooth link injection cavity so that the injection material can enter the stopper injection cavity from the tooth link injection cavity.

[0055] Optionally, when the second plugging member is moved into the injection runner 13, the second plugging member can block the injection material from entering a part of the tooth link injection cavity and the intermediate injection cavity; when the second plugging member is moved out of the injection runner 13 from the opening 131, the blocking of the tooth link injection cavity can be released, and the blocking of the stopper injection cavity can also be released, so that the full-length tooth link and the stopper in the current mold state can be injected.

[0056] In some embodiments, the first auxiliary mold 30 may further be provided with a first limiting structure, which is used to limit the position range of the first mold core 30a during the switching process, so as to prevent the first mold core 30a from moving excessively beyond the preset position range, resulting in the problem of the first mold core 30a falling off.

[0057] Optionally, a limiting post may be provided on the surface of the first auxiliary mold 30 facing the second auxiliary mold 40 to limit the first mold core 30a through the limiting post. Of course, it may also be that a limiting block is provided at the end of the first slide rail 12 and / or the first chute 33 to limit the first mold core 30a through the limiting block.

[0058] In some embodiments, the second auxiliary mold 40 may further be provided with a second limiting structure, which is used to limit the position range of the second mold core 40a during the switching process, so as to prevent the second mold core 40a from moving excessively beyond the preset position range, resulting in the problem of the second mold core 40a falling off.

[0059] Optionally, a limiting post may be provided on the surface of the second auxiliary mold 40 facing the first auxiliary mold 30 to limit the second mold core 40a through the limiting post. Of course, it may also be that a limiting block is provided at the end of the second slide rail 22 and / or the second chute 43 to limit the second mold core 40a through the limiting block.

[0060] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative rather than restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. An injection mold, characterized in that, Including: an upper mold (10), a lower mold (20), a first auxiliary mold (30) and a second auxiliary mold (40); The upper mold (10) and the lower mold (20) can be buckled with each other to enclose a chain tooth injection cavity extending in a first direction; The first auxiliary mold (30) is provided with a first pin groove portion (31) and a first blocking portion (32) that can be respectively switched to one end of the upper mold (10) along the first direction, and the second auxiliary mold (40) is provided with a second pin groove portion (41) and a second blocking portion (42) that can be respectively switched to one end of the lower mold (20) along the first direction; When the first pin groove portion (31) and the second pin groove portion (41) are respectively switched to one ends of the upper mold (10) and the lower mold (20), the first pin groove portion (31) and the second pin groove portion (41) are buckled with each other to enclose a pin injection cavity, and the pin injection cavity is communicated with the chain tooth injection cavity; When the first blocking portion (32) and the second blocking portion (42) are respectively switched to one ends of the upper mold (10) and the lower mold (20), the first blocking portion (32) and the second blocking portion (42) close the chain tooth injection cavity.

2. The injection mold according to claim 1, characterized in that, The first auxiliary mold (30) is movably or rotatably arranged at one end of the upper mold (10) along the first direction; The second auxiliary mold (40) is movably or rotatably arranged at one end of the lower mold (20) along the first direction.

3. The injection mold according to claim 2, characterized in that, One of one end of the upper mold (10) along the first direction and the first auxiliary mold (30) is provided with a first slide rail (12) extending in a second direction, and the other is provided with a first slide groove (33), and the first slide groove (33) is slidably connected to the first slide rail (12); One of one end of the lower mold (20) along the first direction and the second auxiliary mold (40) is provided with a second slide rail (22) extending in the second direction, and the other is provided with a second slide groove (43), and the second slide groove (43) is slidably connected to the second slide rail (22); Wherein, the first direction, the second direction and the setting direction of the upper mold (10) and the lower mold (20) are perpendicular to each other in pairs.

4. The injection mold according to any one of claims 1 to 3, characterized in that The first auxiliary mold (30) includes a first mold core (30a) and a first driving member (30b), the first mold core (30a) is provided with the first pin groove portion (31) and the first blocking portion (32), and the first driving member (30b) is connected to the first mold core (30a) for driving the first mold core (30a) to switch the first pin groove portion (31) and the first blocking portion (32) relative to the upper mold (10); The second auxiliary mold (40) includes a second mold core (40a) and a second driving member (40b). The second mold core (40a) is provided with the second pin groove portion (41) and the second blocking portion (42). The second driving member (40b) is connected to the second mold core (40a) and is used to drive the second mold core (40a) so that the second pin groove portion (41) and the second blocking portion (42) are switched relative to the lower mold (20).

5. The injection mold according to claim 4, characterized in that, Both the first driving member (30b) and the second driving member (40b) are pneumatic driving members, hydraulic driving members or electric driving members.

6. The injection mold according to claim 1, wherein The surface of the first blocking portion (32) facing the second blocking portion (42) is provided with a first receiving groove (321) extending along the first direction. An end of the first receiving groove (321) close to the upper mold (10) is provided with a first baffle (322); The surface of the second blocking portion (42) facing the first blocking portion (32) is provided with a second receiving groove (421) extending along the first direction. An end of the second receiving groove (421) close to the lower mold (20) is provided with a second baffle (422); When the first blocking portion (32) and the second blocking portion (42) are respectively switched to one end of the upper mold (10) and the lower mold (20), the first receiving groove (321) and the second receiving groove (421) are engaged with each other to form a chain tooth receiving cavity, and the first baffle (322) and the second baffle (422) enclose the chain tooth injection cavity.

7. The injection mold according to claim 1 or 6, characterized in that The first pin groove portion (31) is provided with a first avoiding groove (311) extending along the first direction, and the second pin groove portion (41) is provided with a second avoiding groove (411) extending along the first direction; The first blocking portion (32) is provided with a third avoiding groove (323) extending along the first direction, and the second blocking portion (42) is provided with a fourth avoiding groove (423) extending along the first direction; When the first pin groove portion (31) and the second pin groove portion (41) are respectively switched to one end of the upper mold (10) and the lower mold (20), the first avoiding groove (311) and the second avoiding groove (411) are engaged with each other to form a first avoiding channel for threading a core wire; When the first blocking portion (32) and the second blocking portion (42) are respectively switched to one end of the upper mold (10) and the lower mold (20), the third avoiding groove (323) and the fourth avoiding groove (423) are engaged with each other to form a second avoiding channel for threading a core wire.

8. The injection mold according to claim 1, characterized in that, The pin injection cavity includes a main runner, a plurality of branch runners and a plurality of cavity units for injecting pins of different shapes; When the first pin groove portion (31) and the second pin groove portion (41) are respectively switched to one end of the upper mold (10) and the lower mold (20), one end of the main runner is communicated with the chain tooth injection cavity, and one end of each of the plurality of branch runners is respectively communicated with the other end of the main runner, and the other end of each is respectively communicated with the plurality of cavity units.

9. The injection mold according to claim 8, characterized in that, The plug injection cavity further includes a slideway, and the slideway is correspondingly arranged with at least a part of the plurality of branch runners; The injection mold further includes a first plugging member (51) and a third driving member (52) connected to each other. The third driving member (52) is arranged on the first auxiliary mold (30) or the second auxiliary mold (40) and is used to drive the first plugging member (51) to move into the slideway to plug at least a part of the branch runners, or move out of the slideway to release the plugging of at least a part of the branch runners.

10. The injection mold according to claim 1, characterized in that, The upper mold (10) is provided with an injection runner (13) extending along the first direction, and an opening (131) is provided at one end of the injection runner (13) facing away from the first auxiliary mold (30); The injection mold further includes a second plugging member and a fourth driving member connected to each other. The second plugging member extends into the injection runner (13) from the opening (131), and the fourth driving member is used to drive the second plugging member to move along the first direction so as to adjust the length space of the injection runner (13) that is plugged.

11. The injection mold according to claim 10, characterized in that, A first stopper groove (14) is provided at one end of the upper mold (10) facing away from the first auxiliary mold (30); A second stopper groove (23) is provided at one end of the lower mold (20) facing away from the second auxiliary mold (40); When the upper mold (10) and the lower mold (20) are buckled with each other, the first stopper groove (14) and the second stopper groove (23) are buckled with each other to form a stopper injection cavity communicating with the injection runner (13), and the second plugging member can adjust the communication or disconnection state between the stopper injection cavity and the chain tooth injection cavity by moving along the first direction.

12. The injection mold according to claim 4, characterized in that, The first auxiliary mold (30) may further be provided with a first limiting structure, and the first limiting structure is used to limit the position range of the first mold core (30a) during the switching process; The second auxiliary mold (40) may further be provided with a second limiting structure, and the second limiting structure is used to limit the position range of the second mold core (40a) during the switching process.

Images