Injection mold

Abstract

The application discloses an injection mold and relates to the field of chain 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 form a chain injection cavity extending along a first direction. The first auxiliary mold is provided with a first pin slot part and a first blocking part which can be switched to one end of the upper mold along the first direction, respectively. The second auxiliary mold is provided with a second pin slot part and a second blocking part which can be switched to one end of the lower mold along the first direction, respectively. When the first pin slot part and the second pin slot part are switched to one end of the upper mold and the lower mold, respectively, the first pin slot part and the second pin slot part are mutually buckled to form a latch injection cavity, and the latch injection cavity is communicated with the chain injection cavity. When the first blocking part and the second blocking part are switched to one end of the upper mold and the lower mold, respectively, the first blocking part and the second blocking part close the chain injection cavity. The application solves the problem that the latch and the chain cannot be simultaneously injected.

Description

Technical Field

[0001] This application belongs to the technical field of chain tooth manufacturing equipment, specifically relating to an injection mold. Background Technology

[0002] The chain teeth have pins at their ends along their length. In related technologies, the chain teeth are first injection molded, and then the pins are injection molded at the ends of the chain teeth after the chain teeth are completed. However, this injection molding method cannot injection mold the pins together with the chain teeth, which not only affects the injection molding efficiency, but also affects the positional accuracy between the pins and chain teeth due to asynchronous injection. Utility Model Content

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

[0004] To solve the above-mentioned technical problems, this application is implemented as follows:

[0005] This application provides an injection mold including: an upper mold, a lower mold, a first auxiliary mold, and a second auxiliary mold;

[0006] The upper mold and the lower mold can be interlocked to form a chain tooth injection cavity extending along the first direction;

[0007] The first auxiliary mold is provided with a first pin groove and a first sealing part that can be switched to one end of the upper mold along the first direction, and the second auxiliary mold is provided with a second pin groove and a second sealing part that can be switched to one end of the lower mold along the first direction.

[0008] When the first pin groove and the second pin groove are switched to one end of the upper mold and the lower mold respectively, the first pin groove and the second pin groove interlock with each other to form a pin injection cavity, and the pin injection cavity is connected to the chain tooth injection cavity.

[0009] When the first sealing part and the second sealing part are switched to one end of the upper mold and the lower mold respectively, the first sealing part and the second sealing part close the chain tooth injection cavity.

[0010] In the injection mold of this application embodiment, when it is necessary to injection mold chain teeth and 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 interlocked to form a pin injection cavity. At the same time, the interlocking of the upper mold and the lower mold can form a chain tooth injection cavity, and the pin injection cavity and the chain tooth injection cavity are interconnected. In this way, the injection material can enter the chain tooth injection cavity and the pin injection cavity, thereby simultaneously molding the pin located at one end of the chain tooth; when it is necessary to When re-injecting a chain tooth to extend it, the first sealing part of the first auxiliary mold can be switched to the end of the upper mold, and the second sealing part of the second auxiliary mold can be switched to the end of the lower mold. This allows the first and second sealing parts to respectively seal the chain tooth injection cavity. In this way, injection molding material can be injected again into the chain tooth injection cavity between the upper and lower molds to form another segment of the chain tooth, thus extending it. This process of individually injection molding chain teeth can be repeated to form more segments, continuously extending the chain tooth until the desired length is achieved. Compared to chain tooth injection molds in related technologies, the injection mold in this embodiment can inject chain teeth of different lengths according to actual needs, thereby adapting to different scenarios and improving the applicability of the injection mold. Attached Figure Description

[0011] Figure 1 This is a disassembly diagram of the injection mold disclosed in the embodiments of this application;

[0012] Figure 2 This is a disassembly diagram of the upper mold and the first auxiliary mold disclosed in the embodiments of this application;

[0013] Figure 3 This is a schematic diagram of the structure of the first auxiliary mold disclosed in the embodiments of this application;

[0014] Figure 4 This is a disassembly diagram of the lower mold, the second auxiliary mold, and the first sealing assembly disclosed in the embodiments of this application;

[0015] Figure 5 This is a schematic diagram of the structure of the second auxiliary mold disclosed in the embodiments of this application;

[0016] Figure 6 This is a schematic diagram showing the state in which the first pin groove portion disclosed in the embodiment of this application is switched to one end of the upper mold;

[0017] Figure 7 This is a schematic diagram showing the first sealing part of the present application being switched to one end of the upper mold.

[0018] Figure 8This is a schematic diagram of the chain teeth and pins formed by injection molding in the first mold according to the embodiments of this application;

[0019] Figure 9 This is a schematic diagram of the chain teeth and pins formed by injection molding of the first and second molds disclosed in the embodiments of this application;

[0020] Figure 10 This is a schematic diagram of the chain teeth, pins, and stops formed by injection molding in the first, second, and third molds disclosed in the embodiments of this application.

[0021] Explanation of reference numerals in the attached figures:

[0022] 10-Upper mold; 11-First chain tooth groove; 12-First slide rail; 13-Injection runner; 131-Opening; 14-First stop groove;

[0023] 20 - Lower mold; 21 - Second chain tooth groove; 22 - Second slide rail; 23 - Second stop groove;

[0024] 30-First auxiliary mold; 30a-First mold core; 30b-First driving component; 31-First pin groove; 311-First clearance groove; 32-First sealing part; 321-First receiving groove; 322-First baffle; 323-Third clearance groove; 33-First slide groove;

[0025] 40-Second auxiliary mold; 40a-Second mold core; 40b-Second driving component; 41-Second pin groove; 411-Second clearance groove; 42-Second sealing part; 421-Second receiving groove; 422-Second baffle; 423-Fourth clearance groove; 43-Second slide groove;

[0026] 50 - First sealing component; 51 - First sealing element; 52 - Third driving element. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0029] The embodiments of this application will be described in detail below with reference to the accompanying drawings and specific examples and application scenarios.

[0030] refer to Figures 1 to 10 This application discloses an injection mold for injection molding chain teeth and 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.

[0031] The upper mold 10 and the lower mold 30 are used together for injection molding of chain teeth. Optionally, the upper mold 10 and the lower mold 30 are arranged in the vertical direction, and the upper mold 10 and the lower mold 30 can be relatively close to each other to facilitate injection molding of chain teeth, or relatively separate to facilitate demolding of chain teeth.

[0032] 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 engaged, the first chain tooth groove 11 and the second chain tooth groove 21 engage with 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 molding process, injection molding material can be injected into the chain tooth injection cavity, and the chain teeth can be formed after the injection molding 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 set in a vertical direction, the first direction can be a horizontal direction or a front-back direction, etc.

[0033] Considering that a pin is also needed during the chain tooth injection molding process, this embodiment of the application utilizes the cooperation of a first auxiliary mold 30 and a second auxiliary mold 40 to form the pin. The first auxiliary mold 30 may have a first pin groove 31 and a first sealing part 32, and the first pin groove 31 and the first sealing part 32 can be switched to one end of the upper mold 10 along a first direction, so that the first pin groove 31 or the first sealing part 32 can mate with one end of the upper mold 10. It should be noted that the first pin groove 31 can be part of the injection-molded pin structure, and the function of the first sealing part 32 is to seal the area of ​​the chain tooth injection cavity located in the upper mold 10 to prevent injection material from leaking from the upper mold 10.

[0034] Accordingly, the second auxiliary mold 40 may be provided with a second pin groove portion 41 and a second sealing portion 42, and the second pin groove portion 41 and the second sealing portion 42 may be switched to one end of the lower mold 30 along the first direction, so as to facilitate the second pin groove portion 41 or the second sealing portion 42 to mate with one end of the lower mold 30. It should be noted here that the second pin groove portion 41 may be another part of the injection pin structure, and the function of the second sealing portion 42 is to seal 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.

[0035] Based on the above configuration, in the case of injection molding of chain teeth and pins, the first pin groove 31 is switched to one end of the upper mold 10, and the second pin groove 41 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 pin groove 31 and the second pin groove 41 are interlocked to form a pin injection cavity, and the pin injection cavity is connected to the chain tooth injection cavity. In this way, the injection material in the chain tooth injection cavity can flow into the pin injection cavity to realize the injection molding of the pin.

[0036] In the case of injection molding of the chain tooth alone, 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 seal the port at one end of the chain tooth injection cavity to close the chain tooth injection cavity and prevent the injection material from leaking.

[0037] It should be noted that during the injection molding of the first molded chain tooth, the chain tooth and the pin located at one end of the first molded chain tooth can be injection molded simultaneously to form a first molded chain tooth with a 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 it is necessary to extend the chain tooth, a second molded chain tooth can be injection molded again at the end of the first molded chain tooth away from the pin to extend the chain tooth. In this case, the first sealing portion 32 and the second sealing 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 molded chain tooth can be located between the first auxiliary mold 30 and the second auxiliary mold 40, so that one end of the first molded chain tooth is opposite to the second molded chain tooth to be injection molded between the upper mold 10 and the lower mold 30. By analogy, the number of injection molds for the chain tooth can be increased according to actual needs until the chain tooth length reaches the required length.

[0038] Compared to chain tooth injection molds in related technologies, the injection mold in this application embodiment 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.

[0039] 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. Optionally, the first auxiliary mold 30 may be connected to the end face of one end 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.

[0040] 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.

[0041] 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 the lower mold 30 along the first direction, or connected to the surface of the lower mold 30 facing the upper mold 10, which can be set according to actual needs.

[0042] Optionally, the movement path of the second auxiliary mold 40 relative to the lower mold 30 can be a straight line or a curve; the rotation mode of the second auxiliary mold 40 relative to the lower mold 30 can be rotation in a plane or flipping in space.

[0043] The upper mold 10 may be provided with a first slide rail 12 extending in the second direction at one end along the first direction and the first auxiliary mold 30 may be provided with a first slide groove 33, the first slide groove 33 being slidably connected to the first slide rail 12; the lower mold 20 may be provided with a second slide rail 22 extending in the second direction at one end along the first direction and the second auxiliary mold 40 may be provided with a second slide rail 22 extending in the second direction and the other auxiliary mold 40 may be provided with a second slide groove 43, the second slide groove 43 being slidably connected to the second slide rail 22.

[0044] In some more specific embodiments, the first auxiliary mold 30 can be slidably connected to the surface of the upper mold 10 facing the lower mold 30 along a straight direction. Specifically, one end of the upper mold 10 along the first direction and the surface facing the lower mold 30 can be provided with a first slide rail 12 extending along a second direction. Correspondingly, the first auxiliary mold 30 can be provided with a first slide groove 33, which is slidably connected to the first slide rail 12. Based on this, the first auxiliary mold 30 can slide relative to the upper mold 10 along the second direction, so as to allow the first pin groove portion 31 or the first sealing portion 32 to switch to a position that mates with one end of the upper mold 10.

[0045] Similarly, the second auxiliary mold 40 can be slidably connected to the surface of the lower mold 30 facing the upper mold 10 along a straight direction. Specifically, one end of the lower mold 30 along the first direction and the surface facing the upper mold 10 can be provided with a second slide rail 22 extending along the second direction. Correspondingly, the second auxiliary mold 40 can be provided with a second slide groove 43, which is slidably connected to the first slide rail. Based on this, the second auxiliary mold 40 can be slidable relative to the lower mold 30 along the second direction, so that the second pin groove portion 41 or the second sealing portion 42 can be switched to a position that mates with one end of the lower mold 30.

[0046] The first direction, the second direction, and the orientations of the upper mold 10 and the lower mold 30 are perpendicular to each other. For example, the upper mold 10 and the lower mold 30 can be arranged in the vertical direction, the first direction can be the horizontal direction, and the second direction can be the front-back direction.

[0047] To enable 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. The first mold core 30a may be provided with a first pin groove portion 31 and a first sealing portion 32. 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 sealing portion 32 are switched relative to the upper mold 10.

[0048] For example, when the first auxiliary mold 30 moves relative to the upper mold 10, the first driving member 30b can be a translation 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 can be a rotation driving member to drive the first mold core 30a to rotate relative to the upper mold 10.

[0049] In some more specific embodiments, the first pin groove portion 31 and the first sealing portion 32 can be arranged along the second direction, and the first driving member 30b can be a linear translation driving member. The first mold core 30a can be driven to move along the second direction by the linear translation driving member, so that the first pin groove portion 31 or the first sealing portion 32 can be connected with one end of the upper mold 10.

[0050] To enable 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. The second mold core 40a may have a second pin groove portion 41 and a second sealing 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, causing the second pin groove portion 41 and the second sealing portion 42 to switch relative to the lower mold 30.

[0051] For example, when the second auxiliary mold 40 moves relative to the lower mold 30, the second driving member 40b can be a translation 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 can be a rotation driving member to drive the second mold core 40a to rotate relative to the lower mold 30.

[0052] In some more specific embodiments, the second pin groove portion 41 and the second sealing portion 42 can be arranged along the second direction, and the second driving member 40b can be a linear translation driving member. The linear translation driving member can drive the second mold core 40a to move along the second direction so that the second pin groove portion 41 or the second sealing portion 42 can be connected with one end of the lower mold 30.

[0053] Optionally, both the first drive member 30b and the second drive member 40b can be pneumatic drive members (such as air cylinders), hydraulic drive members (such as hydraulic cylinders), or electric drive members (such as electric cylinders). Of course, other forms are also possible, which are not specifically limited here.

[0054] When it is necessary to injection mold the next batch of chain teeth based on the previous batch, the injection mold in this embodiment can accommodate the tail end of the previous batch of chain teeth so that the tail end of the previous batch of chain teeth can be connected with the head end of the next batch of chain teeth, so as to form chain teeth of the required length on the edge of the chain belt or fabric.

[0055] Based on the above, in this embodiment, the surface of the first sealing part 32 facing the second sealing part 42 may be provided with a first receiving groove 321 extending along the first direction. Correspondingly, the surface of the second sealing part 42 facing the first sealing part 32 may be provided with a second receiving groove 421 extending along the first direction. Thus, when the next molded chain tooth is injection molded, the first sealing part 32 and the second sealing part 42 are respectively switched to one end of the upper mold 10 and the lower mold 20, so that the first sealing part 32 and the second sealing part 42 are combined with each other, and the first receiving groove 321 and the second receiving groove 421 are engaged with each other to form a chain tooth receiving cavity. This allows the chain tooth receiving cavity to accommodate the tail end of the chain tooth from the previous mold, and the tail end of the chain tooth from the previous mold can be limited in a direction perpendicular to the first direction to ensure the positional accuracy of the tail end of the chain tooth from the previous mold.

[0056] Furthermore, during the injection molding of the next chain tooth, the end of the chain tooth injection cavity needs to be sealed. Based on this, a first baffle 322 can be provided at the end of the first receiving groove 321 near the upper mold 10, and correspondingly, a second baffle 422 can be provided at the end of the second receiving groove 421 near the lower mold 30. Thus, during the injection molding of the next chain tooth, the first sealing part 32 and the second sealing part 42 are switched to one end of the upper mold 10 and the lower mold 20, respectively, so that the first sealing part 32 and the second sealing part 42 are combined with each other, and the first baffle 322 and the second baffle 422 are aligned, thereby sealing the port of the chain tooth injection cavity to close the chain tooth injection cavity and prevent leakage of injection material.

[0057] It should be noted that the thickness of the first baffle 322 and the second baffle 422 can be smaller than the tooth spacing of the chain teeth. This can achieve sealing on the one hand, and avoid interference with the chain teeth on the other.

[0058] Considering that core wires are also threaded inside the chain teeth and pins, the issue of how to avoid misalignment of the core wires needs to be considered during the injection molding process of the chain teeth and pins. Based on this, in the embodiments of this application, the first pin groove portion 31 may be provided with a first clearance groove 311 extending along the first direction, and the second pin groove portion 41 may be provided with a second clearance groove 411 extending along the first direction; the first sealing portion 32 may be provided with a third clearance groove 323 extending along the first direction, and correspondingly, the second sealing portion 42 may be provided with a fourth clearance groove 423 extending along the first direction.

[0059] Based on the above configuration, in the case of injection molding of chain teeth and pins, the first pin groove 31 and the second pin groove 41 are switched to one end of the upper mold 10 and the lower mold 20, respectively, so that the first pin groove 31 and the second pin groove 41 are respectively connected to the upper mold 10 and the lower mold 30, so that a first clearance channel for threading the core wire is formed between the first clearance groove 311 of the first pin groove 31 and the second clearance groove 411 of the second pin groove 41. The first clearance channel can communicate with the pin injection cavity, so that the core wire can be connected to the injection-molded pin.

[0060] In the case of injection-molded chain teeth, the first sealing part 32 and the second sealing part 42 are switched to one end of the upper mold 10 and the lower mold 20, respectively, so that the first sealing part 32 and the second sealing part 42 are respectively connected to the upper mold 10 and the lower mold 30, so that a second clearance channel for passing the core wire is formed between the third clearance groove 323 of the first sealing part 32 and the fourth clearance groove 423 of the second sealing part 42. The second clearance channel can communicate with the chain tooth receiving cavity, so that the core wire can be connected to the injection-molded chain teeth.

[0061] Optionally, the third clearance groove 323 can be formed in the first baffle 322, and the fourth clearance groove 423 can be formed in the second baffle 422.

[0062] In some embodiments, the pin injection cavity may include a main flow channel, multiple branch flow channels, and multiple cavity units for injection molding pins of different shapes. The surface of the first pin groove portion 31 facing the second pin groove portion 41 may be provided with multiple first groove units, and the surface of the second pin groove portion 41 facing the first pin groove portion 31 may be provided with multiple second groove units. The multiple first groove units and the multiple second groove units are respectively engaged to form multiple cavity units.

[0063] For example, the multiple cavity units may include square pin cavity units and long pin cavity units, etc. Of course, they may also be other shapes, which are not specifically limited here.

[0064] In the case of injection molding 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 flow channel is connected to the chain tooth injection cavity, one end of each of the multiple branch flow channels is connected to the other end of the main flow channel, and the other end of each branch flow channel is connected to multiple cavity units. Based on this configuration, the injection material in the chain tooth injection cavity can be transported to multiple branch flow channels through the main flow channel, and then to multiple cavity units through the multiple branch flow channels, so as to simultaneously inject multiple pins.

[0065] The surface of the first pin groove 31 facing the second pin groove 41 may be provided with a first main groove and a plurality of first branch grooves. Correspondingly, the surface of the second pin groove 41 facing the first pin groove 31 may be provided with a second main groove and a plurality of second branch grooves. Thus, the first main groove and the second main groove can be interlocked to form a main flow channel, and the plurality of first branch grooves and the plurality of second branch grooves can be interlocked to form a plurality of branch flow channels.

[0066] In some embodiments, the pin injection cavity may further include a slide that corresponds to at least a portion of a plurality of branch channels.

[0067] Furthermore, the injection mold may also include a first sealing component 50, which can seal at least a portion of the multiple branch flow channels, thereby enabling the injection of injection material into a portion of the cavity units while leaving the other portion of the cavity units uninjected.

[0068] The first sealing assembly 50 may include a first sealing element 51 and a third driving element 52. The third driving element 52 is disposed on the first auxiliary mold 30 or the second auxiliary mold 40 and connected to the first sealing element 51. It is used to drive the first sealing element 51 into the slide rail and block at least a portion of the branch flow channel, or to drive the first sealing element 51 out of the slide rail to release the blockage of at least a portion of the branch flow channel.

[0069] Based on the above settings, the cavity unit for injecting molding material can be adjusted according to actual needs.

[0070] In some embodiments, the upper mold 10 may be provided with an injection channel 13 extending in a first direction to deliver injection material to the chain tooth injection cavity through the injection channel 13. In addition, the end of the injection channel 13 facing away from the first auxiliary mold 30 may be provided with an opening 131.

[0071] Furthermore, the injection mold may also include a second sealing assembly, which may include a second sealing member and a fourth driving member. The second sealing member extends into the injection channel 13 through an opening, and the fourth driving member is connected to the second sealing member to drive the second sealing member to move along a first direction to adjust the length space of the injection channel 13 that is blocked.

[0072] It should be noted that the length of the second sealing element moving into the injection channel 13 through the opening 131 can affect the length of the injection channel 13 that is blocked, thereby affecting the injection length of the chain teeth. For example, if the length of the second sealing element moving into the injection channel 13 is large, the length of the injection channel 13 that is blocked will be large, reducing the length of the chain teeth that can enter the injection cavity of the injection material, thus reducing the injection length of the chain teeth; conversely, the injection length of the chain teeth will increase.

[0073] In some embodiments, the upper mold 10 may have a first stop groove 14 at the end opposite to the first auxiliary mold 30, and correspondingly, the lower mold 30 may have a second stop groove 23 at the end opposite to the second auxiliary mold 40. When the upper mold 10 and the lower mold 20 are engaged, the first stop groove 14 and the second stop groove 23 engage to form a stop injection cavity communicating with the injection channel 13. The second sealing member can adjust the communication or isolation state between the stop injection cavity and the chain tooth injection cavity by moving along the first direction. Based on this, when it is necessary to inject the chain tooth separately, the stop injection cavity can be isolated from the chain tooth injection cavity to prevent the injection material from entering the stop injection cavity; when it is necessary to inject the stop, the stop injection cavity can be communicated with the chain tooth injection cavity so that the injection material can enter the stop injection cavity from the chain tooth injection cavity.

[0074] Optionally, when the second sealing member moves into the injection runner 13, the second sealing member can block the injection material from entering part of the chain tooth injection cavity and the injection cavity between them; when the second sealing member moves out of the injection runner 13 from the opening 131, the sealing of the chain tooth injection cavity and the sealing of the stop injection cavity can be released, so that the full length of the chain tooth and the stop in the current mold state can be injection molded.

[0075] In some embodiments, the first auxiliary mold 30 may also 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 and exceeding the preset position range, resulting in the first mold core 30a falling off.

[0076] Optionally, a limiting post can be provided on the surface of the first auxiliary mold 30 facing the second auxiliary mold 40 to limit the first mold core 30a. Alternatively, a limiting block can be provided at the end of the first slide rail 12 and / or the first slide groove 33 to limit the first mold core 30a.

[0077] In some embodiments, the second auxiliary mold 40 may also 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 and exceeding the preset position range, resulting in the second mold core 40a falling off.

[0078] Optionally, a limiting post can be provided on the surface of the second auxiliary mold 40 facing the first auxiliary mold 30 to limit the second mold core 40a. Alternatively, a limiting block can be provided at the end of the second slide rail 22 and / or the second slide groove 43 to limit the second mold core 40a.

[0079] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An injection mold, characterized in that, include: Upper mold (10), lower mold (20), first auxiliary mold (30), and second auxiliary mold (40); The upper mold (10) and the lower mold (20) can be interlocked to form a chain tooth injection cavity extending along the first direction; The first auxiliary mold (30) is provided with a first pin groove (31) and a first sealing part (32) that can be switched to one end of the upper mold (10) along the first direction, respectively. The second auxiliary mold (40) is provided with a second pin groove (41) and a second sealing part (42) that can be switched to one end of the lower mold (20) along the first direction, respectively. When the first pin groove (31) and the second pin groove (41) are switched to one end of the upper mold (10) and the lower mold (20) respectively, the first pin groove (31) and the second pin groove (41) are engaged with each other to form a pin injection cavity, and the pin injection cavity is connected to the chain tooth injection cavity; When the first sealing part (32) and the second sealing part (42) are switched to one end of the upper mold (10) and the lower mold (20) respectively, the first sealing part (32) and the second sealing part (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 disposed at one end of the upper mold (10) along the first direction; The second auxiliary mold (40) is movably or rotatably disposed at one end of the lower mold (20) along the first direction.

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

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 a first pin groove (31) and a first sealing part (32). 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 (31) and the first sealing part (32) are switched 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 a second pin groove (41) and a second sealing part (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 (41) and the second sealing part (42) switch relative to the lower mold (20).

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

6. The injection mold according to claim 1, characterized in that, The surface of the first sealing part (32) facing the second sealing part (42) is provided with a first receiving groove (321) extending along the first direction, and the end of the first receiving groove (321) near the upper mold (10) is provided with a first baffle (322). The second sealing part (42) has a second receiving groove (421) extending in the first direction on the surface facing the first sealing part (32), and a second baffle (422) is provided at the end of the second receiving groove (421) near the lower mold (20). When the first sealing part (32) and the second sealing part (42) are switched to one end of the upper mold (10) and the lower mold (20) respectively, 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) close the chain tooth injection cavity.

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

8. The injection mold according to claim 1, characterized in that, The pin injection cavity includes a main flow channel, multiple branch flow channels, and multiple cavity units for injection molding pins of different shapes. When the first pin groove (31) and the second pin groove (41) are switched to one end of the upper mold (10) and the lower mold (20) respectively, one end of the main channel is connected to the chain tooth injection cavity, one end of each of the multiple branch channels is connected to the other end of the main channel, and the other end of each is connected to the multiple cavity units respectively.

9. The injection mold according to claim 8, characterized in that, The pin injection cavity further includes a slide, which is configured to correspond to at least a portion of the plurality of branch flow channels; The injection mold also includes a first sealing member (51) and a third driving member (52) connected together. The third driving member (52) is disposed on the first auxiliary mold (30) or the second auxiliary mold (40) and is used to drive the first sealing member (51) to move into the slide and block at least part of the branch flow channel, or to move out of the slide and release the blockage of at least part of the branch flow channel.

10. The injection mold according to claim 1, characterized in that, The upper mold (10) is provided with an injection channel (13) extending along the first direction, and the end of the injection channel (13) facing away from the first auxiliary mold (30) is provided with an opening (131). The injection mold also includes a second sealing member and a fourth driving member connected together. The second sealing member extends into the injection channel (13) through the opening (131), and the fourth driving member is used to drive the second sealing member to move along the first direction to adjust the length space of the injection channel (13) that is blocked.

11. The injection mold according to claim 10, characterized in that, The upper mold (10) is provided with a first stop groove (14) at the end opposite to the first auxiliary mold (30). The lower mold (20) is provided with a second stop groove (23) at one end away from the second auxiliary mold (40); When the upper mold (10) and the lower mold (20) are engaged with each other, the first stop groove (14) and the second stop groove (23) are engaged with each other to form a stop injection cavity that communicates with the injection flow channel (13). The second sealing member can adjust the communication or isolation state between the stop 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 also 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; The second auxiliary mold (40) may also 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.

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