Demolding mechanism and injection molding equipment

Abstract

The utility model provides a demolding mechanism and injection molding equipment, the demolding mechanism comprises a male mold insert core and a sliding block, the male mold insert core is provided with a containing cavity, the bottom wall of the containing cavity is provided with a first through hole, the sliding block is movably installed in the containing cavity, the demolding mechanism further comprises a transmission part, a rotating rod and a guide hole, the side wall of the transmission part is in transmission connection with the sliding block and is provided with a spiral inclined face, one end of the rotating rod extends into the containing cavity through the first through hole to be connected with the transmission part, the guide block is provided with a mounting hole, the side wall of the mounting hole is provided with a guide inclined face, and the rotating rod penetrates through the mounting hole and is connected with the sliding block through the guide inclined face. And the spiral inclined surface is rotatably connected with the guide inclined surface, so that the transmission piece axially rotates to drive the sliding block to move in the horizontal direction, the friction between the sliding block and a product can be reduced, the product quality can be improved, the service life of the demolding mechanism can be prolonged, and the demolding mechanism is convenient to maintain.

Description

Technical Field

[0001] This application relates to the field of die technology, and particularly to a demolding mechanism and an injection molding device. Background Art

[0002] Die forming is a commonly used manufacturing method in industry. Demolding is an important step in die production, mainly relying on a demolding mechanism to achieve demolding after the material is formed. When the product has a relatively complex structure, such as an undercut or an inverted hook, an angled lifter mechanism is required to achieve demolding. However, the angled lifter mechanism is prone to jamming and other failures, and it is easy to scratch the product, affecting the product quality. Summary of the Utility Model

[0003] In view of this, this application provides a demolding mechanism and an injection molding device to facilitate solving the problems of low product yield and inconvenient equipment maintenance in the prior art.

[0004] This application provides a demolding mechanism, which includes:

[0005] A male mold insert, which has a receiving cavity, and the bottom wall of the receiving cavity has a first through hole;

[0006] A slider, which is movably installed in the receiving cavity;

[0007] A transmission member, the side wall of which is in transmission connection with the slider;

[0008] A rotating rod, which has a spiral inclined surface, and one end of the rotating rod extends into the receiving cavity through the first through hole and is connected to the transmission member;

[0009] A guide block, which has a mounting hole, and the side wall of the mounting hole has a guide inclined surface. The rotating rod passes through the mounting hole so that the spiral inclined surface is rotationally connected to the guide inclined surface, thereby axially rotating the transmission member and driving the slider to move in the horizontal direction.

[0010] In a possible implementation manner, the guide block includes a first guide block and a second guide block. The first guide block and the second guide block respectively have grooves, and the first guide block and the second guide block are spliced, and the grooves enclose to form the mounting hole.

[0011] In a possible implementation manner, the transmission member has a gear, the transmission member is installed on the rotating rod and can rotate with the rotating rod, and the side wall of the slider has a rack. The transmission member and the slider are meshed with each other through the gear and the rack.

[0012] In a possible implementation, the slider includes a first slider and a second slider. The first slider is stacked on the second slider. The outer wall of the first slider has a first rack, and the outer wall of the second slider has a second rack.

[0013] The transmission member includes a first gear and a second gear. The first gear is stacked on the second gear. The diameter of the first gear is different from that of the second gear. The first gear meshes with the first rack, and the second gear meshes with the second rack.

[0014] In a possible implementation, the slider has a chute, and the demolding mechanism further includes a positioning member. One end of the positioning member is fixed to the bottom wall of the receiving cavity, and the other end is inserted into the slider to slidably connect with the chute.

[0015] In a possible implementation, the chute has a stepped portion, and the side wall of the positioning member has a protruding portion. The protruding portion is slidably clamped with the stepped portion.

[0016] In a possible implementation, the demolding mechanism further includes a ejector rod. The bottom wall of the receiving cavity has a second through hole. One end of the ejector rod extends into the receiving cavity through the second through hole to eject the molded product.

[0017] In a possible implementation, there are two groups of sliders. The two groups of sliders are respectively arranged on both sides of the transmission member. The transmission member can simultaneously drive the two sliders to move in the horizontal direction.

[0018] The present application also provides an injection molding device, including a mold and a demolding mechanism. The demolding mechanism is the demolding mechanism described in any of the above embodiments.

[0019] The demolding mechanism provided by the present application uses a horizontally moving slider for demolding. The slider is not easily jammed during horizontal movement, has a low failure rate and is easy to maintain, and reduces the possibility of the slider scratching the product, which can improve the quality and yield of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic structural diagram of an implementation of the demolding mechanism provided by the present application;

[0022] Figure 2Schematic diagram of the internal structure of an embodiment of the demolding mechanism provided by this application;

[0023] Figure 3 Schematic diagram of the structure of an embodiment of the guide block provided by this application;

[0024] Figure 4 Schematic diagram of the structure of an embodiment of the slider and the transmission member provided by this application;

[0025] Figure 5 Schematic diagram of the structure of an embodiment of the male mold insert provided by this application;

[0026] Figure 6 Cross-sectional view of the demolding mechanism provided by this application during product molding;

[0027] Figure 7 Cross-sectional view of the demolding mechanism provided by this application during demolding;

[0028] Figure 8 Cross-sectional view of an embodiment of the mold provided by this application.

[0029] Explanation of reference numerals:

[0030] 1 - male mold insert;

[0031] 11 - receiving cavity;

[0032] 12 - first through hole;

[0033] 13 - second through hole;

[0034] 2 - slider;

[0035] 21 - first slider;

[0036] 211 - first rack;

[0037] 22 - second slider;

[0038] 221 - second rack;

[0039] 23 - chute;

[0040] 231 - stepped portion;

[0041] 3 - rotating rod;

[0042] 31 - spiral inclined plane;

[0043] 4 - transmission member;

[0044] 41 - first gear;

[0045] 42 - second gear;

[0046] 5 - guide block;

[0047] 51 - Mounting hole;

[0048] 511 - Guide inclined plane;

[0049] 52 - First guide block;

[0050] 53 - Second guide block;

[0051] 6 - Positioning member;

[0052] 61 - Protrusion;

[0053] 7 - Ejector rod;

[0054] 8 - Mold;

[0055] 81 - First mounting plate;

[0056] 82 - Second mounting plate;

[0057] 83 - Third mounting plate;

[0058] A - Product;

[0059] B - Metal part. Detailed implementation manner

[0060] In order to better understand the technical solution of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0061] It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0062] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "a", "the" and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0063] It should be understood that the term " / and / " used herein is only a description of the associated relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0064] As shown in FIG. 1, the embodiment of the present application provides a demolding mechanism, which is applicable to equipment for material forming and demolding. The demolding mechanism includes a male mold insert 1 and a slider 2. As Figure 2As shown, the male mold insert 1 has a receiving cavity 11, and a slider 2 can be set inside the receiving cavity 11. The slider 2 can move inside the receiving cavity 11, and the slider 2 can slide against the inner wall of the receiving cavity 11. After the mold is closed, a cavity is formed between the inner wall of the receiving cavity 11 and the slider 2, which is used to inject materials to form product A. For example, the material can be plastic, etc. When the molten material is injected into the inside of the receiving cavity 11, the material will be confined between the slider 2 and the inner wall of the receiving cavity 11. When the material is formed, when the mold is opened, the slider 2 can move inside the receiving cavity 11, so as to separate from the formed product A, which is convenient for material demolding. According to the shape of the actual product A, the shape of the slider 2 can be set accordingly. For example, when the product has structures such as undercuts or hooks, a protrusion 61 can be set on the surface of the slider 2, so that the final formed product forms a corresponding depression, and finally obtains the target shape. The inner wall of the receiving cavity 11 can also be set with corresponding inclined structures according to the required shape of the formed product. A guide groove can be set on the inner wall of the accommodating cavity 11, and the slider 2 can be set inside the guide groove and slide along the guide groove. The guide groove can be formed by the inner wall of the accommodating cavity 11 being recessed toward the outside, or it can be formed by the inner wall of the accommodating cavity 11 protruding along the height direction of the demolding component.

[0065] The demoulding mechanism also includes a rotating rod 3 and a transmission member 4. Figure 5 As shown, the bottom wall of the accommodating cavity 11 has a first through hole 12, the rotating rod 3 has a spiral inclined surface 31, a part of the rotating rod 3 passes through the first through hole 12 and extends into the interior of the accommodating cavity 11, the end of the rotating rod 3 is connected to the transmission member 4, and the side wall of the transmission member 4 is transmission-connected to the slider 2. When the rotating rod 3 is driven to rotate, the transmission member 4 rotates with the rotating rod 3 and can drive the slider 2 to move inside the accommodating cavity 11. The transmission member 4 can be a gear or a transmission belt, as long as the rotating rod 3 can drive the slider 2 to move through the transmission member 4. Specifically, the slider 2 can move in a straight line inside the accommodating cavity 11. After the injected material is formed, the rotating rod 3 rotates in the opposite direction, and the slider 2 can move in a direction away from the product A, thereby separating from the already formed material, so as to facilitate further separation of the formed material from the male mold insert 1. In particular, there is a concave part on the product A, and the slider 2 has a corresponding convex part. After the slider 2 moves, the convex part can be completely separated from the concave part of the already formed material.

[0066] The demolding mechanism further includes a guiding block 5. The guiding block 5 has a mounting hole 51, and the side wall of the mounting hole 51 has a guiding inclined surface 511. The rotating rod 3 passes through the mounting hole 51 so that the spiral inclined surface 31 is rotationally connected with the guiding inclined surface 511, thereby enabling the transmission member 4 to rotate axially and further driving the slider 2 to move in the horizontal direction. The horizontal direction includes the x direction and / or the y direction, and the direction during mold opening and closing is the z direction. The x direction, the y direction, and the z direction are perpendicular to each other. There are two groups of sliders 2, and when the two groups of sliders 2 are arranged on the front side and the rear side of the transmission member 4 along the x direction respectively, or on the left side and the right side of the transmission member 4 along the y direction respectively, the transmission member 4 rotates axially and can drive the slider 2 to move in the x direction or the y direction; when there are four groups of sliders 2, and the four groups of sliders 2 are arranged on the front side, the rear side, the left side, and the right side of the transmission member 4 in the x direction and the y direction respectively, the transmission member 4 rotates axially and can drive the slider 2 to move in the x direction and the y direction.

[0067] For the demolding mechanism of this embodiment, through inclined plane spiral transmission, such a setting is convenient for reducing the volume of the demolding mechanism, simplifying the structure, saving the installation space, facilitating maintenance, and can stably drive the slider 2 to move with high precision.

[0068] The existing angled lifter mechanism uses an angled pin for demolding. During demolding, the angled lifter will move in a relatively inclined direction, and the contact friction between the angled lifter and the product surface is likely to cause product wear and reduce the product yield. On the other hand, the space occupied by the angled pin is large, and the longer the stroke of the angled pin and the larger the inclination angle, the more likely it is to cause demolding jamming. Therefore, the angled pin needs to be frequently maintained, increasing the production cost. The demolding mechanism provided by the embodiment of the present application uses a horizontally moving slider 2 for demolding. The slider 2 is not easily jammed when moving horizontally, has stable movement, high precision, low failure rate, and is convenient for maintenance, improving the production efficiency, and reducing the possibility of the slider 2 scratching the product, and can improve the product quality and the product yield.

[0069] The spiral inclined surface 31 extends along the height direction of the rotating rod 3. The height direction refers to the z direction or a direction approximately parallel to the z direction. Multiple spiral inclined surfaces 31 can be provided on the rotating rod 3, and the multiple spiral inclined surfaces 31 are arranged at intervals. When the guiding block 5 moves axially along the rotating rod 3, the guiding inclined surface 511 can push the spiral inclined surface 31 to make the rotating rod 3 rotate, thereby further driving the slider 2 to move, having the advantages of stable movement and high precision.

[0070] As Figure 3 shown, in a possible implementation manner, the guiding block 5 includes a first guiding block 52 and a second guiding block 53. The first guiding block 52 and the second guiding block 53 respectively have grooves, and the first guiding block 52 and the second guiding block 53 are spliced, and the grooves of the two enclose to form the mounting hole 51.

[0071] The first guide block 52 and the second guide block 53 can be spliced ​​and arranged, and the grooves are matched with each other, and the grooves can be enclosed to form the mounting hole 51. By designing the guide block 5 as a split body, it is convenient for the guide block 5 to be sleeved on the rotating rod 3. The first guide block 52 and the second guide block 53 can be fixedly connected, or the first guide block 52 and the second guide block 53 can be fixedly installed on the mounting plate of the mold at the same time, and move vertically with the mounting plate, so as to achieve relative fixation of the position and maintain the sleeved state with the rotating rod 3.

[0072] like Figure 2 As shown, in a possible implementation, the transmission member 4 has a gear, and the transmission member 4 can rotate with the rotating rod 3. The side wall of the slider 2 has a rack, and the transmission member 4 and the slider 2 are meshed with each other through the gear and the rack.

[0073] The transmission member 4 is mounted on the rotating rod 3, and the transmission member 4 can rotate with the rotating rod 3. The extension direction of the rack is consistent with the preset movement direction of the slider 2. When the rotating rod 3 rotates, the transmission member 4 can rotate with the rotating rod 3. Further, the rotation of the transmission member 4 can drive the slider 2 to move in the horizontal direction, thereby controlling the position of the slider 2 in the accommodating cavity 11 to achieve the molding and demoulding of the product A. By controlling the movement of the slider 2 through the cooperation of the gear and the rack, the movement accuracy of the slider 2 and the quality of the molded product A can be improved.

[0074] like Figure 4 As shown, in a possible embodiment, the slider 2 includes a first slider 21 and a second slider 22, the first slider 21 is stacked on the second slider 22, the outer wall of the first slider 21 has a first rack 211, and the outer wall of the second slider 22 has a second rack 221. The transmission member 4 includes a first gear 41 and a second gear 42, the first gear 41 and the second gear 42 are arranged along the height direction of the demoulding mechanism, the diameter of the first gear 41 is different from the diameter of the second gear 42, the first gear 41 and the first rack 211 are meshed with each other, and the second gear 42 and the second rack 221 are meshed with each other.

[0075] By setting multiple sliders 2, the first slider 21 and the second slider 22 can be set to different forms respectively, which is convenient for realizing more diverse forms and complex structures of product A. The first slider 21 is driven by the first gear 41, and the second slider 22 is driven by the second gear 42. The diameters of the first gear 41 and the second gear 42 are different, so the first slider 21 and the second slider 22 can be driven to move different distances in the same time. Because in actual production, the sizes of the first slider 21 and the second slider 22 will be different. Especially due to the shape requirements of product A, there are differences in the lengths of the protruding parts of the first slider 21 and the second slider 22, resulting in differences in the overall length dimensions of the first slider 21 and the second slider 22. When the rotating rod 3 rotates and the transmission member 4 drives the first slider 21 and the second slider 22 to move, the first slider 21 and the second slider 22 are driven to move different distances by two gears with different diameters, namely the first gear 41 and the second gear 42. Specifically, when the length of the first slider 21 is greater than that of the second slider 22, the first slider 21 needs to move a longer distance compared to the second gear 42 to completely separate from product A, while the second slider 22 only needs to move a relatively small distance. Therefore, the first rack 211 can cooperate with the first gear 41 with a larger diameter, and the second rack 221 cooperates with the second slider 22 with a relatively smaller diameter. After the rotating rod 3 rotates, both the first slider 21 and the second slider 22 can separate from product A, which is convenient for demolding. However, the second slider 22 will move a shorter distance relative to the first slider 21. Since the space inside the accommodating cavity 11 is limited, if there are certain processing errors in the first slider 21 and the second slider 22, it will cause damage by colliding with the inner wall of the accommodating cavity 11. Therefore, by accurately controlling the respective moving distances of the first slider 21 and the second slider 22, the possibility of the first slider 21 and the second slider 22 being damaged by collision can be minimized as much as possible when demolding is completed, and the service life of the demolding mechanism can be improved. The diameters and gear parameters of the first gear 41 and the second gear 42 can be flexibly adjusted and set according to the specific shapes of the first slider 21 and the second slider 22. For example, when the rotating rod 3 rotates 65°, the first slider 21 can move 8.5 mm, while the second slider 22 can move 6.8 mm.

[0076] As Figure 4 shown, in a possible implementation manner, the demolding mechanism includes a positioning member 6. The slider 2 has a chute 23. One end of the positioning member 6 is fixed to the bottom wall of the accommodating cavity 11, and the other end is inserted into the slider 2 to be slidably connected with the chute 23. Specifically, the slider 2 can move along the positioning member 6 through the chute 23.

[0077] The positioning member 6 extends along the height direction of the demolding mechanism. The positioning member 6 is fixedly installed on the bottom wall of the accommodating cavity 11. The side wall of the positioning member 6 is in sliding contact with the inner wall of the sliding groove 23. When the slider 2 moves, the positioning member 6 can guide the movement of the slider 2, improving the stability and accuracy of the movement of the slider 2. The cross-sectional shape of the positioning member 6 can be rectangular, and the shape of the sliding groove 23 is adapted to the shape of the positioning member 6.

[0078] As Figure 4 shown, in a possible implementation manner, the sliding groove 23 has a stepped portion 231, and the side wall of the positioning member 6 has a protruding portion 61. The protruding portion 61 is in sliding engagement with the stepped portion 231.

[0079] The stepped portion 231 extends in the horizontal direction. Correspondingly, the side wall of the positioning member 6 has a protruding portion 61. The protruding portion 61 can be in sliding engagement with the stepped portion 231 along the height direction of the demolding mechanism, thereby limiting the slider 2 along the height direction of the demolding mechanism and reducing the possibility of the slider 2 disengaging from the positioning member 6. When the slider 2 includes a first slider 21 and a second slider 22, the first slider 21 is stacked on the second slider 22. The stepped portion 231 is provided in the sliding groove 23 of the first slider 21, and the positioning member 6 penetrates through the first slider 21 and the second slider 22.

[0080] As Figure 1 shown, in a possible implementation manner, the demolding mechanism includes a ejector rod 7. As Figure 5 shown, the bottom wall of the accommodating cavity 11 has a second through hole 13. One end of the ejector rod 7 extends into the accommodating cavity 11 through the second through hole 13, and the ejector rod 7 can move along the height direction of the demolding mechanism.

[0081] The ejector rod 7 passes through the second through hole 13 and extends into the interior of the accommodating cavity 11. When the product A is demolded, the slider 2 first moves to separate from the product A, and then the ejector rod 7 moves along the height direction of the demolding assembly to lift the product A, facilitating the removal of the product A from the male mold insert 1. The demolding mechanism can be provided with multiple ejector rods 7 to lift the product A from different positions, improving the demolding efficiency and also enabling the product A to be evenly stressed and reducing the possibility of being damaged.

[0082] In another embodiment, the number of sliders 2 is not limited to two or four groups. The slider 2 can also be three or more groups. The inner wall of the accommodating cavity 11 can be provided with inner walls to divide the accommodating cavity 11 into multiple parts, facilitating the setting of three or more groups of sliders 2 such as three or four groups, forming different cavities, thereby respectively performing material molding and simultaneously producing multiple products A, improving the processing efficiency. Among them, the transmission member 4 can drive multiple groups of sliders 2 to move simultaneously, thereby simplifying the structure of the demolding mechanism and facilitating maintenance.

[0083] As Figure 1As shown in the figure, when the demolding mechanism provided by this application is working, a metal part B can be set to cooperate with the product A for molding. Specifically, an opening can be provided at the top of the male mold insert 1, and the metal part B is covered on the opening of the male mold insert 1 to form a cavity with the slider 2. The metal part B is provided with an injection hole so that materials can be injected into the cavity through the injection hole. Then, materials are injected into the cavity and finally molded. The product A formed by the injected materials can be connected to the metal part B to become an integral body. The injected materials can be plastics in a flowing state. Such a processing method can process more different types of products and meet more actual needs.

[0084] As Figure 8 shown in the figure, this application provides an injection molding device, including a mold 8 and a demolding mechanism, and the demolding mechanism is the demolding mechanism of any of the above embodiments.

[0085] The mold 8 provided by this application has a mounting plate. Along the height direction of the mold 8, the mounting plate is located at the bottom of the demolding mechanism. The mounting plate includes a first mounting plate 81, a second mounting plate 82, and a third mounting plate 83 arranged in sequence along the height direction. The first mounting plate 81 is located on the top of the second mounting plate 82, and the first mounting plate 81 is connected to the guide block 5. When the first mounting plate 81 moves along the height direction, it can drive the guide block 5 to move along the height direction, thereby driving the rotating rod 3 to rotate. The second mounting plate 82 is located on the top of the third mounting plate 83. The second mounting plate 82 has a cavity, and a part of the ejector rod 7 is arranged inside the cavity. The side wall of the ejector rod 7 has a stop portion, and the stop portion is located at a relatively middle position of the cavity and has a certain preset distance from the bottom wall of the cavity. The first mounting plate 81 and the second mounting plate 82 are connected to move synchronously. When the first mounting plate 81 moves, it first drives the guide block 5 to move and drives the slider 2 to separate from the product A. At this time, the bottom wall of the cavity of the second mounting plate 82 has not contacted the stop portion yet. When the slider 2 is completely separated from the product A, the bottom wall of the cavity just moves to the position where it contacts the stop portion. The bottom wall of the cavity abuts against the stop portion and drives the ejector rod 7 to move, ejecting the product A out of the inside of the accommodation cavity 11. The rotating rod 3 is rotatably installed on the third mounting plate 83, and the third mounting plate 83 plays a positioning role for the rotating rod 3.

[0086] This application provides a demolding mechanism and an injection molding device, which can reduce the friction between the slider and the product, is beneficial to improving the product quality processing efficiency, can improve the service life of the demolding mechanism, and is convenient for maintaining the demolding mechanism.

[0087] The above has detailed the structure, features, and function effects of this application according to the embodiments shown in the drawings. The above is only the preferred embodiment of this application, but this application does not limit the implementation scope according to the drawings shown. Any changes made according to the concept of this application, or modified into equivalent embodiments with equivalent changes, still within the spirit covered by the specification and the drawings, should be within the protection scope of this application.

Claims

1. A demolding mechanism, characterized in that, The demolding mechanism includes: A male mold insert (1), the male mold insert (1) having a receiving cavity (11), the bottom wall of the receiving cavity (11) having a first through hole (12); A slider (2), the slider (2) being movably installed in the receiving cavity (11); A transmission member (4), the side wall of the transmission member (4) being in driving connection with the slider (2); A rotating rod (3), having a spiral inclined surface (31), one end of the rotating rod (3) extending into the receiving cavity (11) through the first through hole (12) to be connected with the transmission member (4); A guide block (5), the guide block (5) having a mounting hole (51), the side wall of the mounting hole (51) having a guiding inclined surface (511), the rotating rod (3) passing through the mounting hole (51) so that the spiral inclined surface (31) is rotationally connected with the guiding inclined surface (511), thereby axially rotating the transmission member (4) and driving the slider (2) to move in the horizontal direction.

2. The demolding mechanism according to claim 1, characterized in that, The guide block (5) includes a first guide block (52) and a second guide block (53), the first guide block (52) and the second guide block (53) respectively having grooves, the first guide block (52) and the second guide block (53) being spliced, and the grooves enclosing to form the mounting hole (51).

3. The demolding mechanism according to claim 1, wherein, The transmission member (4) has gears, the transmission member (4) being installed on the rotating rod (3) and capable of rotating with the rotating rod (3), the side wall of the slider (2) having racks, and the transmission member (4) and the slider (2) being meshed with each other through the gears and the racks.

4. The demolding mechanism according to claim 3, characterized in that, The slider (2) includes a first slider (21) and a second slider (22), the first slider (21) being stacked on the second slider (22), the outer wall of the first slider (21) having a first rack (211), and the outer wall of the second slider (22) having a second rack (221); The transmission member (4) includes a first gear (41) and a second gear (42), the first gear (41) being stacked on the second gear (42), the diameter of the first gear (41) being different from the diameter of the second gear (42), the first gear (41) and the first rack (211) being meshed with each other, and the second gear (42) and the second rack (221) being meshed with each other.

5. The demolding mechanism according to claim 1, wherein The slider (2) has a chute (23), and the demolding mechanism further includes a positioning member (6), one end of the positioning member (6) being fixed to the bottom wall of the receiving cavity (11), and the other end being inserted into the slider (2) to be slidably connected with the chute (23).

6. The demolding mechanism according to claim 5, characterized in that, The chute (23) has a stepped portion (231), and the side wall of the positioning member (6) has a protruding portion (61), the protruding portion (61) being slidably clamped with the stepped portion (231).

7. The demolding mechanism according to any one of claims 1 to 6, characterized in that, The demolding mechanism further includes a ejector rod (7), the bottom wall of the receiving cavity (11) having a second through hole (13), and one end of the ejector rod (7) extending into the receiving cavity (11) through the second through hole (13) to eject the molded product.

8. The demolding mechanism according to claim 1, wherein The slider (2) is provided in two groups, and the two groups of sliders (2) are respectively arranged on both sides of the transmission member (4), and the transmission member (4) can simultaneously drive the two sliders (2) to move in the horizontal direction.

9. An injection molding device, characterized in that, It includes a mold (8) and a demolding mechanism, and the demolding mechanism is the demolding mechanism described in any one of claims 1 to 8.

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