Clamping seat injection mold

Abstract

The utility model belongs to the technical field of injection molds, and particularly relates to a clamping seat injection mold which comprises a top plate, an upper die sleeve; a lower die sleeve; two side plates; a bottom plate; a synchronous jacking mechanism; wherein the upper mold core and the lower mold core are butted and matched to form a sub-runner, one end of the sub-runner is communicated with the injection molding runner, the other end of the sub-runner is divided into a plurality of branches, and each branch is communicated with one cavity; each cavity is formed by mutually matching an upper mold core, a lower mold core, a demolding assembly and a plurality of forming assemblies, and the demolding assembly is in transmission connection with the synchronous jacking mechanism. According to the utility model, the simultaneous injection molding of various clamping seats is realized, the production efficiency is obviously improved, the development cost is reduced, the problem of limiting clamping stagnation between a clamping seat finished product and a cavity in the mold opening process is solved, the smooth demolding of the product is ensured, the production efficiency is improved, and the production cost is reduced. In addition, possible damage to the finished clamping seat in the demolding process is effectively avoided, and the product quality is improved.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, and specifically relates to a card holder injection mold. Background Technology

[0002] A retainer is a component used to fasten parts, serving to connect and fix them, ensuring the stable and precise operation of each part. Retainers are generally made of plastic and, depending on the functional requirements of the application (e.g., limiting latches, precise fit, load-bearing capacity, and durability), often exhibit complex geometric shapes and various concave and convex structures on different areas of their outer surface. While this structure can improve the overall performance of the retainer, it also presents significant technical challenges to its manufacturing process, especially the injection molding process.

[0003] Conventional injection mold cavities are typically formed by interlocking grooves on upper and lower mold cores, allowing for relatively smooth molding and demolding when producing general injection molded products. However, when this mold design is applied to the production of the aforementioned card holder, it creates demolding difficulties.

[0004] Specifically, because the outer surface of the card holder has various concave and convex structures, the traditional mold opening method will cause the cavity and the finished product to be locked together, making it difficult for the product to be smoothly removed from the mold. This problem not only seriously affects production efficiency, but may also damage the finished card holder, increase production costs and reduce product quality. Utility Model Content

[0005] The purpose of this invention is to provide a card holder injection mold that solves the technical problem of card holders being difficult to demold in the prior art.

[0006] This utility model discloses a card holder injection mold, comprising:

[0007] Top plate, with injection molding channels on the top surface;

[0008] The upper mold sleeve is located on the lower side of the top plate and includes an upper template and an upper mold core embedded in the bottom surface of the upper template;

[0009] The lower mold sleeve, located below the upper mold sleeve, includes a lower template and a lower mold core embedded in the top surface of the lower template;

[0010] Two side plates are provided on both sides of the bottom surface of the lower template;

[0011] A base plate is provided on the bottom surface of the two side plates;

[0012] A synchronous lifting mechanism is provided between the two side plates;

[0013] The upper mold core and the lower mold core are connected to form a runner. One end of the runner is connected to the injection runner, and the other end branches out into multiple branches, each of which is connected to a cavity. Each cavity is formed by the upper mold core, the lower mold core, the demolding assembly, and several molding assemblies working together. The demolding assembly is connected to the synchronous lifting mechanism.

[0014] This application achieves simultaneous injection molding of multiple card holders by designing a runner system and multiple cavities, thereby significantly improving production efficiency and effectively reducing mold development costs. Furthermore, the cavity is composed of an upper mold core, a lower mold core, a demolding component, and several molding components, which cleverly solves the problem of limiting and jamming between the finished card holder and the cavity during the mold opening process, ensuring that the product can be smoothly demolded from the mold. This not only further improves production efficiency but also effectively avoids potential damage to the finished card holder during demolding, thereby improving product quality.

[0015] Based on the above technical solution, the solution of this application can be further improved as follows:

[0016] Preferably, the bottom surface of the upper mold sleeve is provided with multiple upper receiving grooves, and the top surface of the lower mold sleeve is provided with multiple lower receiving grooves. The upper receiving grooves and the lower receiving grooves can be matched one-to-one to form a receiving cavity for installing the molding component.

[0017] The molding component includes:

[0018] A forming slider is slidably installed in the lower cavity, and has a forming surface on one side;

[0019] The drive slide rod is fixedly installed in the upper cavity and inserted obliquely into the forming slider;

[0020] The limiting insert is located in the upper cavity and can be inserted into the lower cavity after mold closing, maintaining a tight fit with the side of the forming slider away from the cavity. This solution can automatically complete the position adjustment during the mold opening and closing process, adapting to the production needs of card holders of different sizes and shapes, and has the advantage of high versatility. Through precise displacement and stable support, it ensures forming accuracy and surface quality. In addition, its structure is simple and compact, with low production cost and easy installation.

[0021] Preferably, the contact surfaces of the limiting insert and the forming slider are inclined surfaces and parallel to the axis of the driving slide rod. With this design, the limiting insert will always be in contact with the forming slider after being inserted into the lower groove, thereby providing stable support for the forming slider and improving the smoothness and stability of the sliding.

[0022] Preferably, the lower cavity has assembly slots on both sides, and the molding assembly includes:

[0023] Two limiting strips are detachably installed in the assembly groove and extend into the lower cavity to form a vertical limiting engagement with the side of the forming slider. This solution serves to limit and guide the forming slider, enhancing the stability and accuracy of sliding, and facilitating the disassembly and replacement of the forming components, thus reducing maintenance costs and time.

[0024] Preferably, the bottom surface of the base plate has a connecting through hole, and the synchronous lifting mechanism includes:

[0025] Multiple guide rods are vertically arranged between the lower template and the base plate;

[0026] The push plate is horizontally positioned and forms a sliding sleeve with the guide rod;

[0027] Multiple guide rods are vertically installed on the top surface of the push plate and pass upward through the lower template;

[0028] Multiple reset springs are movably sleeved on the guide rod, corresponding one to one, and constrained between the lower template and the base plate. By adopting this solution, the synchronous driving of each demolding component is achieved by utilizing the synergistic effect between the components and the cooperation of the connecting through holes on the base plate. Its structure is simple and compact, its operation is smooth, and it ensures the stability of mold demolding.

[0029] Preferably, the lower mold sleeve has a movable cavity, and the demolding assembly includes:

[0030] The support rod is vertically installed on the top surface of the push plate and extends upward through the movable cavity;

[0031] A sleeve is fitted into the top surface of the lower mold sleeve and movably fitted onto the support rod;

[0032] The top block is fixedly installed on the top of the support rod and embedded in the top of the sleeve;

[0033] A drive spring is movably sleeved on the support rod and constrained between the bottom end of the sleeve and the bottom of the movable cavity;

[0034] The sleeve is provided with a limiting slider, and the lower mold sleeve is provided with a limiting groove for sliding cooperation with the limiting slider. By adopting this solution, the demolding process is divided into two stages, which effectively prevents the finished product of the card holder from being subjected to excessive force in a local area during the demolding process, thereby avoiding deformation or damage, thus improving the smoothness of demolding and product quality.

[0035] Preferably, it includes:

[0036] Multiple ejector pins are vertically mounted on the top surface of the ejector plate and inserted upwards into the lower mold sleeve, extending into the runner. This design allows for convenient and efficient cleaning of waste materials, ensuring mold cleanliness and smooth operation of the next injection molding process, thereby improving production efficiency and helping to maintain the long-term stability of the mold and product quality.

[0037] Preferably, the synchronous lifting mechanism includes:

[0038] Multiple stop blocks are installed on the top surface of the push plate;

[0039] Multiple support columns are installed on the top surface of the base plate, pass through the push plate, and abut against the bottom surface of the lower template. This design is used to limit the displacement of the push plate, prevent it from directly contacting the lower mold sleeve, avoid damage to the mold, and provide support to improve the stability of the mold structure.

[0040] Through the above technical solution, this utility model achieves the following beneficial effects:

[0041] 1. This application achieves simultaneous injection molding of multiple card holders by designing a runner and multiple cavities, thereby significantly improving production efficiency and effectively reducing mold development costs. Furthermore, the cavity is composed of an upper mold core, a lower mold core, a demolding component, and several molding components, which cleverly solves the problem of limiting and jamming between the finished card holder and the cavity during the mold opening process, ensuring that the product can be smoothly demolded from the mold. This not only further improves production efficiency but also effectively avoids damage to the finished card holder during the demolding process, thereby improving product quality.

[0042] 2. This application, by setting the molding components including mutually cooperating molding sliders, drive sliders and limiting blocks, can automatically complete the position adjustment during the mold opening and closing process, which can adapt to the production needs of card holders of different sizes and shapes, has high versatility, and ensures molding accuracy and surface quality through precise displacement and stable support. It also has the advantages of simple and compact structure, low production cost and easy installation and layout. Attached Figure Description

[0043] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the structure of the card holder injection mold according to a specific embodiment of this utility model;

[0045] Figure 2 for Figure 1 The image shows a transverse mid-section view of the injection mold for the card holder.

[0046] Figure 3 for Figure 1 The shown is a transverse side sectional view of the injection mold for the card holder.

[0047] Figure 4 for Figure 1 The image shows a longitudinal mid-section view of the injection mold for the card holder.

[0048] Figure 5 for Figure 1 The longitudinal side sectional view of the injection mold for the card holder shown;

[0049] Figure 6 for Figure 1 A schematic diagram of the top surface of the lower mold sleeve in the injection mold of the card holder shown;

[0050] Explanation of reference numerals in the attached figures:

[0051] 1. Top plate; 2. Upper mold sleeve; 2a. Upper template; 2b. Upper mold core; 3. Lower mold sleeve; 3a. Lower template; 3b. Lower mold core; 4. Side plate; 5. Bottom plate; 6. Synchronous lifting mechanism; 7. Runner; 8. Cavity; 9. Demolding assembly; 10. Molding assembly; 11. Ejector pin;

[0052] 101. Injection runner; 201. Upper cavity; 301. Lower cavity; 302. Assembly groove; 303. Movable cavity; 304. Limiting slide groove; 501. Connecting through hole; 601. Guide rod; 602. Push plate; 603. Guide rod; 604. Return spring; 605. Stop block; 606. Support column; 901. Support rod; 902. Sleeve; 903. Top block; 904. Drive spring; 1001. Molding slider; 1002. Drive slide rod; 1003. Limiting insert; 1004. Limiting strip;

[0053] 9021, Limiting slider; 10011, Forming surface. Detailed Implementation

[0054] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0055] First, it should be noted that some directional terms used in the following description to clearly illustrate the technical solution of this utility model, such as the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," are all derived from the normal orientation of the parts in the injection mold of the card holder. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0056] In this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0057] To better understand the above technical solutions, the following will provide a detailed description of the technical solutions in conjunction with the accompanying drawings and specific embodiments.

[0058] Example:

[0059] like Figures 1-6 As shown in the figure, this application discloses a card holder injection mold for injection molding a card holder. Its specific structure includes: a top plate 1, an upper mold sleeve 2, a lower mold sleeve 3, two side plates 4, a bottom plate 5, and a synchronous lifting mechanism 6.

[0060] The top surface of the top plate 1 is provided with an injection runner 101, which is used to guide molten plastic into the mold.

[0061] The upper mold sleeve 2 is located on the lower side of the top plate 1 and is attached and fixed to the top plate 1. It includes an upper template 2a and an upper mold core 2b embedded in the bottom surface of the upper template 2a.

[0062] The lower mold sleeve 3 is located below the upper mold sleeve 2 and includes a lower template 3a and a lower mold core 3b embedded in the top surface of the lower template 3a.

[0063] Two side plates 4 are placed on both sides of the bottom surface of the lower template 3a, serving to support and fix the mold.

[0064] The base plate 5 is located on the bottom surface of the two side plates 4, providing a stable base for the entire mold.

[0065] The synchronous lifting mechanism 6 is located between the two side plates 4, and is used to simultaneously drive all the demolding components 9 to perform demolding operations, thereby improving production efficiency.

[0066] The upper mold core 2b and the lower mold core 3b are connected to form a runner 7. One end of the runner 7 is connected to the injection runner 101, and the other end branches out into multiple branches, each of which is connected to a cavity 8. Each cavity 8 is formed by the cooperation of the upper mold core 2b, the lower mold core 3b, the demolding component 9, and several molding components 10. The demolding component 9 is connected to the synchronous lifting mechanism 6.

[0067] The working principle of the above technical solution is as follows:

[0068] When the mold is closed, the upper mold sleeve 2 and the lower mold sleeve 3 are tightly fitted together, and the upper mold plate 2a and the lower mold core 3b are aligned and fitted together, thus forming the runner 7. Together with the demolding component 9 and the molding component 10, they are assembled to form multiple cavities 8. Then, the molten injection material enters the runner 7 through the injection channel 101, and then flows to each cavity 8 through the branch channels, thus completing the synchronous molding of multiple card holders.

[0069] When the mold is separated, the top plate 1 and the upper mold sleeve 2 remain stationary, while the bottom plate 5 drives the side plate 4 and the lower mold sleeve 3 to move away from the top plate 1. As a result, the upper mold sleeve 2 and the lower mold sleeve 3 gradually separate, while the molding component 10 moves laterally away from the cavity 8, causing the card holder finished product to detach from the molding component 10.

[0070] When the mold is demolded, the synchronous lifting mechanism 6 simultaneously drives multiple demolding components 9 to work. Each demolding component 9 lifts and demolds the finished product of the card holder in a cavity 8, thereby separating the outer surface of the finished product of the card holder from the cavity 8.

[0071] This invention, through the design of a runner 7 and multiple cavities 8, enables the simultaneous injection molding of various card holders, thereby significantly improving production efficiency and effectively reducing mold development costs. Furthermore, the cavity 8 is composed of a carefully matched upper mold core 2b, lower mold core 3b, demolding component 9, and several molding components 10. This design cleverly solves the problem of limiting and jamming between the finished card holder and the cavity 8 during mold opening, ensuring that the product can be smoothly demolded from the mold. This not only further improves production efficiency but also effectively avoids potential damage to the finished card holder during demolding, thus improving product quality.

[0072] In some embodiments, such as Figure 4 and Figure 5 As shown, the bottom surface of the upper mold sleeve 2 is provided with multiple upper receiving grooves 201, and the top surface of the lower mold sleeve 3 is provided with multiple lower receiving grooves 301. The upper receiving grooves 201 and the lower receiving grooves 301 can be assembled one by one to form a receiving cavity for installing the molding component 10, which is used to avoid the molding component 10 interfering with the mold closing of the upper mold sleeve 2 and the lower mold sleeve 3.

[0073] In this embodiment, the molding assembly 10 includes: a molding slider 1001, a driving slider 1002, and a limiting block 1003, which are configured as follows:

[0074] The forming slider 1001 is slidably installed in the lower cavity 301, and has a forming surface 10011 on one side. The forming surface 10011 will assemble the cavity 8 when the mold is closed.

[0075] The drive slide bar 1002 is fixedly installed in the upper cavity 201 and is inserted obliquely into the forming slide bar 1001;

[0076] The limiting insert 1003 is located in the upper cavity 201 and can be inserted into the lower cavity 301 after the mold is closed. It is in close contact with the side of the molding slider 1001 away from the cavity 8, which ensures the stability of the molding slider 1001 when the mold is closed and prevents it from shifting during the molding process, thereby ensuring the molding accuracy and quality of the product.

[0077] During the opening and closing of the mold, the lower mold sleeve 3 moves closer to or further away from the upper mold sleeve 2, so the forming slider 1001 slides obliquely along the drive slide rod 1002, and then slides relative to it in the lower cavity 301; so when the mold is closed, it moves just enough to make the forming surface 10011 and other parts fit together to form the cavity 8, and when the mold is opened, it moves again to make the card holder completely separate from the forming surface 10011 without forming a limit jam.

[0078] Through the above design of the molding component 10, the position adjustment can be automatically completed during the mold opening and closing process, which can adapt to the production needs of card holders of different sizes and shapes, with high versatility. Through precise displacement and stable support, the molding accuracy and surface quality are guaranteed. It also has the advantages of simple and compact structure, low production cost and easy installation and layout.

[0079] Based on the above embodiments, such as Figure 5 As shown, the contact surfaces of the limiting insert 1003 and the forming slider 1001 are inclined surfaces and are parallel to the axis of the driving slider 1002.

[0080] With the above settings, the limiting block 1003 will always be in contact with the forming slider 1001 after being inserted into the lower cavity 301, thereby providing stable support for the forming slider 1001 and improving the smoothness and stability of sliding.

[0081] Based on the above embodiments, such as Figure 6 As shown, the lower container 301 has assembly slots 302 on both sides. The molding component 10 includes two limiting strips 1004, which are detachably installed in the assembly slots 302 and extend into the lower container 301 to form a vertical limiting engagement with the side of the molding slider 1001.

[0082] The above design serves to limit and guide the forming slider 1001, enhancing the stability and accuracy of sliding, and facilitating the disassembly and replacement of the forming component 10, thus reducing maintenance costs and time.

[0083] In some embodiments, such as Figure 2 and Figure 3 As shown, the bottom surface of the base plate 5 has a connecting through hole 501. The synchronous lifting mechanism 6 includes: multiple guide rods 601, a push plate 602, multiple guide rods 603, and multiple return springs 604, which are configured as follows:

[0084] Multiple guide rods 601 are vertically set and arranged between the lower template 3a and the base plate 5 to guide and support, ensuring that the push plate 602 moves smoothly and without deviation along the predetermined direction;

[0085] The push plate 602 is horizontally set and forms a sliding sleeve with the guide rod 601 to synchronously transmit the driving force to each demolding component 9. The push plate 602 is preferably composed of two plates, which facilitates the assembly and fixing of each component and subsequent inspection and maintenance.

[0086] Multiple guide rods 603 are vertically set on the top surface of the push plate 602 and pass upward through the lower template 3a, which plays a limiting and guiding role and prevents the reset spring 604 from deviating or twisting.

[0087] Multiple reset springs 604 are movably sleeved on the guide rod 603 in a corresponding manner and constrained between the lower template 3a and the base plate 5, and are used to drive the push plate 602 to reset by using the rebound force.

[0088] During operation, the piston rod of the drive mechanism passes through the bottom plate 5 via the connecting through hole 501, thereby pushing the push plate 602 to slide along the guide rod 601, which in turn drives the various demolding components 9 to move; at the same time, the return spring 604 is gradually compressed, and the guide rod 603 is used to prevent the return spring 604 from twisting during the compression process.

[0089] Through the above design of the synchronous lifting mechanism 6, the synergistic effect between the components and the cooperation of the connecting through holes 501 on the base plate 5 are used to realize the synchronous driving of each demolding component 9. Its structure is simple and compact, its operation is smooth, and it ensures the stability of mold demolding.

[0090] Based on the above embodiments, such as Figure 2 and Figure 5 As shown, the lower mold sleeve 3 has a movable cavity 303. The demolding assembly 9 includes: a support rod 901, a sleeve 902, an ejector block 903, and a drive spring 904, which are configured as follows:

[0091] The support rod 901 is set vertically and is located on the top surface of the push plate 602, and passes upward through the movable cavity 303;

[0092] Sleeve 902 is embedded in the top surface of lower mold sleeve 3 and is movably sleeved on support rod 901;

[0093] The top block 903 is fixedly installed on the top of the support rod 901 and embedded in the top of the sleeve 902;

[0094] The drive spring 904 is movably sleeved on the support rod 901 and constrained between the bottom end of the sleeve 902 and the bottom of the movable cavity 303;

[0095] The sleeve 902 is provided with a limiting slider 9021 on the outside, and the lower mold sleeve 3 is provided with a limiting groove 304 for sliding cooperation with the limiting slider 9021.

[0096] When the mold is demolded, the push plate 602 will drive the support rod 901 to rise, and the support rod 901 will drive the top block 903 to rise together. During this process, the sleeve 902 will maintain a nested relationship with the top block 903 and rise synchronously under the action of the rebound force of the drive spring 904. Then the sleeve 902 and the top block 903 will jointly apply force to the finished product of the card holder, thereby causing the finished product of the card holder to detach. Afterwards, when the limiting slider 9021 moves to the upper limit of the stroke in the limiting slide groove 304, the sleeve 902 will be limited and will not be able to rise further. At this time, the top block 903 continues to rise under the drive of the support rod 901, and gradually detaches from the top of the sleeve 902, thereby pushing the finished product of the card holder to separate from the top of the sleeve 902.

[0097] Through the further design of the demolding component 9 described above, the demolding process is divided into two stages, which effectively prevents the finished product of the card holder from being subjected to excessive force in local areas during the demolding process, thereby avoiding deformation or damage, thus improving the smoothness of demolding and product quality.

[0098] In some embodiments, such as Figure 2 It includes: multiple push rods 11, which are vertically arranged on the top surface of the push plate 602 and inserted upward into the lower mold sleeve 3, and can extend into the flow channel 7.

[0099] When the mold is demolded, the push plate 602 will drive the ejector pin 11 to rise. As the ejector pin 11 extends into the runner 7, it can effectively eject the waste material remaining in the runner 7.

[0100] The above settings allow for convenient and efficient cleaning of waste materials, ensuring mold cleanliness and smooth operation of the next injection molding process. This improves production efficiency and helps maintain the long-term stability of the mold and product quality.

[0101] In some embodiments, the synchronous lifting mechanism 6 includes: a plurality of stop blocks 605 and a plurality of support columns 606, configured as follows:

[0102] Multiple stop blocks 605 are installed on the top surface of the push plate 602 to limit the displacement of the push plate 602 and prevent it from directly contacting the lower mold sleeve 3, thus avoiding damage to the mold.

[0103] Multiple support columns 606 are installed on the top surface of the base plate 5, pass through the push plate 602, and abut against the bottom surface of the lower template 3a, which plays a supporting role and improves the stability of the mold structure.

[0104] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0105] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A card holder injection mold characterized by, The utility model relates to a multi-cavity injection moulding machine, comprising: a top plate provided with an injection flow channel on the top surface; an upper die sleeve provided on the lower side of the top plate, comprising an upper die plate and an upper die core embedded on the bottom surface of the upper die plate; a lower die sleeve provided on the lower side of the upper die sleeve, comprising a lower die plate and a lower die core embedded on the top surface of the lower die plate; two side plates provided on the bottom surface of the lower die plate; a bottom plate provided on the bottom surface of the two side plates; a synchronous lifting mechanism provided between the two side plates; wherein the upper die core and the lower die core are connected to form a branch flow channel, one end of the branch flow channel is connected to the injection flow channel, and the other end branches into multiple branches, each branch is connected to a cavity; each cavity is formed by the upper die core, the lower die core, a demoulding assembly and a plurality of forming assemblies, and the demoulding assembly is drivingly connected to the synchronous lifting mechanism; a connecting through hole is formed on the bottom surface of the bottom plate, and the synchronous lifting mechanism comprises: a plurality of guide rods vertically arranged between the lower die plate and the bottom plate; a push plate horizontally arranged and slidably connected to the guide rods; a plurality of guide rods vertically arranged on the top surface of the push plate and upwardly penetrating the lower die plate; a plurality of return springs correspondingly arranged on the guide rods and constrained between the lower die plate and the bottom plate; an active cavity is formed in the lower die sleeve, and the demoulding assembly comprises: a support rod vertically arranged on the top surface of the push plate and upwardly penetrating the active cavity; a sleeve embedded on the top surface of the lower die sleeve and slidably arranged on the support rod; a top block fixedly arranged on the top end of the support rod and embedded in the top end of the sleeve; a driving spring slidably arranged on the support rod and constrained between the bottom end of the sleeve and the bottom of the active cavity; 2. The card-injection mold of claim 1, wherein wherein a limiting sliding block is arranged outside the sleeve, and a limiting sliding groove is arranged in the lower die sleeve and slidably connected to the limiting sliding block. a plurality of upper accommodating grooves are formed on the bottom surface of the upper die sleeve, a plurality of lower accommodating grooves are formed on the top surface of the lower die sleeve, and the upper accommodating grooves and the lower accommodating grooves can be correspondingly combined to form accommodating cavities for mounting the forming assemblies; the forming assembly comprises: a forming sliding block slidably arranged in the lower accommodating groove and provided with a forming surface on one side; a driving sliding rod fixedly arranged in the upper accommodating groove and obliquely inserted into the forming sliding block; 3. The card-injection mold of claim 2, wherein, a limiting plug arranged in the upper accommodating groove and capable of being inserted into the lower accommodating groove after mould closing and closely abutting against the side of the forming sliding block away from the cavity.

4. The card-injection mold of claim 2, wherein, the contact surfaces of the limiting plug and the forming sliding block are inclined surfaces and parallel to the axis of the driving sliding rod. the two sides of the lower accommodating groove are provided with assembly grooves, and the forming assembly comprises:

5. The card-injection mold of claim 1, wherein, two limiting strips respectively detachably arranged in the assembly grooves and extending into the lower accommodating groove to form a vertical limiting clamping with the side surface of the forming sliding block. the utility model relates to a multi-cavity injection moulding machine, comprising:

6. The card-injection mold of claim 1, wherein, a plurality of top rods vertically arranged on the top surface of the push plate and upwardly inserted into the lower die sleeve and capable of extending into the branch flow channel. the synchronous lifting mechanism comprises: a plurality of stop blocks arranged on the top surface of the push plate; a plurality of support columns arranged on the top surface of the bottom plate, penetrating the push plate and abutting against the bottom surface of the lower die plate.

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