Double-color injection mold
By setting a clamping mechanism and a limiting mechanism on the moving mold core, the problem of displacement of the product during mold opening in a two-color injection mold is solved, ensuring the molding quality of the two-color product.
Patent Information
- Application Number
- CN202423011272.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-06
AI Technical Summary
In the two-color injection molding process, the product in one injection sticks to the fixed mold, causing displacement when the mold is opened, which affects the product quality.
A clamping mechanism is set on the moving mold core. The clamping block fixes a shot product when the mold is closed. The clamping block can be moved stably by the limit mechanism at different stations to limit and release the limit.
It effectively prevents the first-shot product from shifting during mold opening, ensuring the molding quality of the second-shot product. The structure is ingeniously designed and the operation is highly reliable.
Smart Images
Figure CN223493742U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of two-color injection molding technology, and specifically relates to a two-color injection mold. Background Technology
[0002] Two-color injection molding involves using a rotating and translating core on an injection molding machine to mold different cavities. The machine injects different colors of the same material or different materials of plastic into each cavity to create a two-color product. Typically, a first injection is formed, then the mold is opened and closed again to form the second injection. During mold opening, the first injection needs to remain in the moving mold cavity for the second injection. However, during mold opening, the first injection may stick to the fixed mold, potentially causing it to detach from the moving mold cavity or shift, affecting the quality of the two-color injection molded product. Utility Model Content
[0003] The purpose of this utility model is to provide a two-color injection mold to solve the problem that when a two-color injection mold is opened after the product has been molded, the product is easy to come out of the moving mold cavity or shift.
[0004] This utility model is achieved through the following technical solution:
[0005] Two-color injection molds, including:
[0006] A fixed mold, wherein the fixed mold is provided with a first fixed mold core for molding a first-shot product and a second fixed mold core for molding a second-shot product;
[0007] The moving mold has two identical moving mold cores, and multiple clamping mechanisms for fixing a shot product are provided on the outside of the moving mold cavity of the moving mold cores.
[0008] The clamping mechanism includes a clamping block that slides with the moving mold core, and the clamping block is capable of horizontal movement in a direction away from or towards the moving mold cavity;
[0009] When the fixed mold and the moving mold are closed, the clamping block on the moving mold core that is closed with the first fixed mold core can be pushed to move closer to the moving mold cavity, and the clamping block on the moving mold core that is closed with the second fixed mold core can be pushed to move away from the moving mold cavity.
[0010] In some embodiments, the clamping block is provided with a first driving part and a second driving part;
[0011] The fixed mold is provided with a third driving part that cooperates with the first driving part at a position corresponding to the first fixed mold core. When the fixed mold and the moving mold are closed, the clamping block on the corresponding moving mold core is driven to move towards the moving mold cavity through the cooperation between the third driving part and the first driving part.
[0012] The second fixed mold core is provided with a fourth driving part that cooperates with the second driving part. When the fixed mold and the moving mold are closed, the fourth driving part cooperates with the second driving part to drive the clamping block on the corresponding moving mold core to move away from the moving mold cavity.
[0013] In some embodiments, the clamping block includes a sliding part for slidingly engaging with the moving mold core, a cantilevered portion extending toward the moving mold cavity and disposed on the clamping part, and a driving part protruding onto the sliding part toward the fixed mold.
[0014] The first driving part and the second driving part are a first driving surface and a second driving surface disposed opposite to each other on the driving part, and the first driving surface and the second driving surface are inclined surfaces oriented in opposite directions;
[0015] The fixed mold is provided with a first recess for the drive part to extend into, and the third drive part is a third drive surface located on the first recess, and the third drive surface and the first drive surface are in contact.
[0016] The second fixed mold core is provided with a second recess for the drive part to extend into, and the fourth drive part is a fourth drive surface located on the second recess, and the fourth drive surface and the second drive surface are engaged.
[0017] The fixed mold has a third recess at the location of the second fixed mold core, into which the driving part extends. The third recess provides space for the driving part to move in a direction away from the moving mold cavity.
[0018] In some embodiments, a limiting mechanism is also included, which is used to limit the sliding of the clamping block on the moving mold core, and when the clamping block slides under the action of an external force, the limiting mechanism can release the restriction on the clamping block under the action of the force applied by the clamping block.
[0019] In some embodiments, the limiting mechanism includes a first limiting member and an elastic reset member. The first limiting member is slidably engaged with the moving mold core, enabling the first limiting member to move in the vertical direction. The elastic reset member is used to provide a force to the first limiting member to move in the direction of the clamping block.
[0020] The first limiting member is provided with a first limiting part, and the clamping block is provided with a second limiting part that cooperates with the first limiting part. The cooperation between the first limiting part and the second limiting part can limit the clamping block in the position of fixing a shot product and in the position of releasing the fixing of a shot product.
[0021] In some embodiments, the first limiting part is a protrusion provided on the first limiting member, and the second limiting part is two grooves provided on the bottom surface of the pressing block. When the protrusion extends into the groove, it can limit the pressing block, and when the pressing block is subjected to a sliding force, the protrusion can dislodge from the groove.
[0022] In some embodiments, the protrusions and grooves are provided with opposing wedge-shaped surfaces along the sliding direction.
[0023] In some embodiments, the limiting mechanism includes a limiting plate disposed on the moving mold core, the limiting plate being provided with a limiting hole, the first limiting member being disposed in the limiting hole, and the elastic reset member being a wave screw fixedly disposed on the first limiting member, the other end of the wave screw abutting against the moving mold.
[0024] Compared with the prior art, this utility model has the following advantages and beneficial effects:
[0025] In this utility model, a clamping mechanism for fixing the first injection product is provided on the moving mold core. The clamping mechanism fixes the first injection product in the moving mold cavity when the mold is opened, which effectively solves the problem of the first injection product shifting due to adhesion between the first injection product and the fixed mold.
[0026] By coordinating the clamping mechanism with other parts of the mold, when the mold is closed, the clamping block on the moving mold core that cooperates with the first fixed mold core can be pushed to the position to fix the first shot product, thereby clamping and fixing the first shot product; at the same time, the clamping block on the moving mold core that cooperates with the second fixed mold core can be pushed to the position to release the clamping and fixing of the first shot product, so as to avoid the impact of the clamping block on the molding of the second shot product and to allow the two-color product after the second shot molding to be topped out when the mold is opened.
[0027] By setting up a limiting mechanism and working in conjunction with the clamping mechanism, the position of the clamping block at two different workstations can be effectively limited, ensuring the stability of the clamping block's position. At the same time, through the design of the limiting mechanism structure, while limiting the clamping block, the limiting of the clamping block can be released by the mutual cooperation between the components when it is necessary to drive the clamping block to move. The structure is ingeniously designed and has high operational reliability. Attached Figure Description
[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0029] Figure 1 This is a schematic diagram of the closed state structure of a two-color injection mold according to an embodiment of this utility model.
[0030] Figure 2 This is a cross-sectional schematic diagram of the two-color injection mold in the mold-closed state according to an embodiment of the present invention.
[0031] Figure 3 This is a schematic diagram of the closed state structure of the first fixed mold core and the moving mold core in a two-color injection mold according to an embodiment of this utility model.
[0032] Figure 4 This is a schematic diagram of the clamping mechanism on the moving mold core of a two-color injection mold according to an embodiment of the present invention.
[0033] Figure 5 This is a cross-sectional schematic diagram of the two-color injection mold in the first fixed mold core position according to an embodiment of the present invention.
[0034] Figure 6 for Figure 5 A partial schematic diagram of point A in the middle.
[0035] Figure 7 This is a cross-sectional schematic diagram of the two-color injection mold at the second fixed mold core position in an embodiment of this utility model.
[0036] Figure 8 for Figure 7 A partial schematic diagram of point B in the middle.
[0037] Figure 9 This is a schematic diagram of the pressing mechanism in an embodiment of this utility model.
[0038] Figure 10 This is a schematic diagram of the cooperation structure between the first limiting member and the pressing block in the pressing mechanism of this utility model embodiment.
[0039] Figure 11 This is a schematic diagram of the limiting mechanism in the clamping mechanism of this utility model embodiment.
[0040] in:
[0041] 10. Fixed mold; 101. First recess; 102. Third driving surface; 103. Third recess; 11. First fixed mold core; 12. Second fixed mold core; 121. Second recess; 122. Fourth driving surface.
[0042] 20. Moving mold; 21. Moving mold core; 211. Moving mold cavity;
[0043] 30. Clamping mechanism; 31. Clamping block; 311. Driving part; 3111. First driving surface; 3112. Second driving surface; 312. Sliding part; 313. Clamping part; 314. Groove; 32. Limiting slide rail; 33. First limiting member; 331. Protrusion; 34. Elastic reset member; 35. Limiting plate.
[0044] 41. One-shot product; 42. Two-shot product. Detailed Implementation
[0045] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.
[0046] To address the problem of product adhesion between the first-shot product and the fixed mold during two-color injection molding, which causes product displacement, this invention provides a two-color injection mold. By setting a clamping mechanism on the moving mold core to fix the first-shot product, the clamping mechanism fixes the first-shot product in the moving mold cavity during mold opening, thus avoiding the problem of product displacement caused by adhesion between the first-shot product and the fixed mold.
[0047] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments of this utility model, the two-color injection mold includes:
[0048] The fixed mold 10 is provided with a first fixed mold core 11 for molding a first-shot product 41 and a second fixed mold core 12 for molding a second-shot product 42.
[0049] The moving mold 20 has two identical moving mold cores 21. Multiple clamping mechanisms 30 for fixing the injection product are provided on the outside of the moving mold cavity 211 of the moving mold cores 21. The clamping mechanisms are arranged around the moving mold cavity to fix the injection product at multiple points in various positions.
[0050] The clamping mechanism 30 includes a clamping block 31 that slides with the moving mold core. The clamping block 31 is capable of horizontal movement in a direction away from or towards the moving mold cavity.
[0051] When the fixed mold and the moving mold are closed, the clamping block on the moving mold core that is closed with the first fixed mold core can be pushed to move closer to the moving mold cavity, and the clamping block on the moving mold core that is closed with the second fixed mold core can be pushed to move away from the moving mold cavity.
[0052] By coordinating the clamping mechanism with other parts of the mold, when the mold is closed, the clamping block on the moving mold core that cooperates with the first fixed mold core can be pushed to the position to fix the first shot product, thereby clamping and fixing the first shot product; at the same time, the clamping block on the moving mold core that cooperates with the second fixed mold core can be pushed to the position to release the clamping and fixing of the first shot product, so as to avoid the impact of the clamping block on the molding of the second shot product and to allow the two-color product after the second shot molding to be topped out when the mold is opened.
[0053] In terms of the structural design of the clamping mechanism, since the clamping block needs to be located in different positions during the first and second injection molding processes, and the clamping block is located between the moving mold and the fixed mold, there are great difficulties in designing the motion control mechanism of the clamping block.
[0054] In some embodiments, refer to Figure 5 , Figure 6 , Figure 7 and Figure 8 The clamping block 31 is provided with a first driving part and a second driving part;
[0055] A third driving part is provided on the fixed mold 10 at a position corresponding to the first fixed mold core, which cooperates with the first driving part. When the fixed mold and the moving mold are closed, the clamping block on the corresponding moving mold core is driven to move towards the moving mold cavity through the cooperation between the third driving part and the first driving part.
[0056] The second fixed mold core 12 is provided with a fourth driving part that cooperates with the second driving part. When the fixed mold and the moving mold are closed, the fourth driving part cooperates with the second driving part to drive the clamping block on the corresponding moving mold core to move away from the moving mold cavity.
[0057] During mold closing, the clamping block is driven to move towards the moving mold cavity through the cooperation between the fixed mold and the clamping block, allowing the clamping block to move to a position that can fix the shot product. Through the cooperation between the second fixed mold core and the clamping block, the clamping block is driven to move away from the moving mold cavity, allowing the clamping block to move to a position that releases the fixation of the shot product.
[0058] In some embodiments, refer to Figure 9 and Figure 10 The clamping block 31 includes a sliding part 312 for slidingly engaging with the moving mold core, a cantilever structure extending out toward the moving mold cavity and a driving part 311 protruding on the sliding part toward the fixed mold.
[0059] The first driving unit and the second driving unit are a first driving surface 3111 and a second driving surface 3112 disposed opposite to each other on the driving unit. The first driving surface 3111 and the second driving surface 3112 are inclined surfaces that are inclined in opposite directions. The inclination angle of the first driving surface and the second driving surface is set to 17°.
[0060] The fixed mold 10 is provided with a first recess 101 into which the driving part extends. The third driving part is a third driving surface 102 located on the first recess, and the third driving surface 102 cooperates with the first driving surface 3111.
[0061] The second fixed mold core 12 is provided with a second recess 121 for the drive part to extend into, and the fourth drive part is a fourth drive surface 122 located on the second recess, and the fourth drive surface 122 cooperates with the second drive surface 3112.
[0062] A third recess 103 is provided on the fixed mold 10 at the location of the second fixed mold core, into which the drive part extends. The third recess 103 provides space for the drive part to move in a direction away from the moving mold cavity.
[0063] The sliding fit structure between the sliding part 312 and the moving mold core can be achieved by setting a limiting slide rail 32 on the moving mold core and setting a slider on the sliding part that fits with the limiting slide rail, so that the clamping block can make linear horizontal movement on the limiting slide rail, ensuring the stability and reliability of the clamping block movement.
[0064] The clamping part 313 adopts a cantilever structure, which clamps and fixes the edge of the shot product through its end. While clamping the shot product, it can reduce the volume of the clamping block and facilitate the setting of the clamping block on the moving mold core.
[0065] By setting the drive unit to protrude from the moving mold core, the drive unit can form an effective fit with the fixed mold and the fixed mold core. This allows for the effective use of the fit structure on the fixed mold and the fixed mold core to drive the clamping block effectively, thus solving the problem of driving the clamping block inside the mold.
[0066] By utilizing the mold closing action, a force is generated between the fixed mold, the fixed mold core, and the clamping block, which simplifies the mold structure and makes the operation more stable and reliable. Simultaneously, by differentiating the structures of the fixed mold, the first fixed mold core, and the second fixed mold core, the clamping blocks on the two moving mold cores can be driven to move to different positions during mold closing.
[0067] In some embodiments, a limiting mechanism is also included, which is used to limit the sliding of the clamping block on the moving mold core, and when the clamping block slides under the action of an external force, the limiting mechanism can release the restriction on the clamping block under the action of the force applied by the clamping block.
[0068] By setting up a limiting mechanism, the position of the clamping block is effectively limited at two different workstations, ensuring the stability of the clamping block's position.
[0069] In some embodiments, refer to Figure 10 and Figure 11 The limiting mechanism includes a first limiting member 33 and an elastic reset member 34. The first limiting member 33 slides with the moving mold core, enabling the first limiting member to move in the vertical direction. The elastic reset member 34 provides a force to the first limiting member to move in the direction of the clamping block.
[0070] The first limiting member 33 is disposed at the bottom of the pressing block, and a first limiting part is provided on the end face of the first limiting member 33 opposite to the pressing block;
[0071] The clamping block 31 is provided with a second limiting part that cooperates with the first limiting part. The cooperation between the first limiting part and the second limiting part can limit the clamping block in the position of fixing the product and in the position of releasing the fixing of the product.
[0072] In some embodiments, the first limiting part is a protrusion 314 provided on the first limiting member, and the second limiting part is two grooves 331 provided on the bottom surface of the pressing block. When the protrusion extends into the groove, it can limit the pressing block, and when the pressing block is subjected to a sliding force, the protrusion can dislodge from the groove.
[0073] Reference Figure 6 and Figure 11 Along the sliding direction, the protrusion 314 and the groove 331 are provided with opposing wedge-shaped surfaces. For example, the cross-section of the protrusion and the groove is an isosceles triangle. When the pressing block is subjected to external force and slides, the first limiting member can move downward away from the pressing block under the action between the groove and the protrusion. At this time, the protrusion can exit from one of the grooves and release the limiting of the pressing block. When the pressing block moves to another position, the protrusion moves to the position of the other groove. At this time, the first limiting member moves upward towards the position of the pressing block under the action of the elastic reset member, so that the protrusion is stuck into the groove and the pressing block is limited at this position.
[0074] In some embodiments, the limiting mechanism includes a limiting plate 35 disposed on the moving mold core, a limiting hole disposed on the limiting plate 35, a first limiting member 33 disposed in the limiting hole, and an elastic reset member 34 being a wave screw fixedly disposed on the first limiting member, with the other end of the wave screw abutting against the moving mold.
[0075] The sliding motion of the first limiting member in the vertical direction is achieved through the cooperation between the limiting plate and the first limiting member. The first limiting member is provided with an elastic force in the vertical direction by the wave screw, so that the first limiting member is floating on the moving mold core. The structure is simple and has good motion stability.
[0076] During mold closing, the clamping blocks on the two moving mold cores are driven by the fixed mold and the fixed mold core to move away from or towards the moving mold cavity, so that the clamping blocks on the two fixed mold cores are respectively in the station of fixing the first injection product and the station of contact fixing the first injection product. This effectively solves the problem of the first injection product shifting when the mold is opened in two-color injection molding, and ensures the molding quality of the two-color injection molded product.
[0077] When the first fixed mold core, the second fixed mold core, and the moving mold core are closed, a gap is formed between the end faces of the fixed mold and the moving mold, so that the moving mold core and the fixed mold core can effectively cooperate and ensure the effective driving of the clamping block.
[0078] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to 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.
[0079] Furthermore, the use of terms such as "horizontal" or "vertical" in the description of this utility model does not imply that the component is required to be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0080] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.
[0081] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. A two-color injection mold, characterized in that, include: A fixed mold, wherein the fixed mold is provided with a first fixed mold core for molding a first-shot product and a second fixed mold core for molding a second-shot product; The moving mold has two identical moving mold cores, and multiple clamping mechanisms for fixing a shot product are provided on the outside of the moving mold cavity of the moving mold cores. The clamping mechanism includes a clamping block that slides with the moving mold core, and the clamping block is capable of horizontal movement in a direction away from or towards the moving mold cavity; When the fixed mold and the moving mold are closed, the clamping block on the moving mold core that is closed with the first fixed mold core can be pushed to move closer to the moving mold cavity, and the clamping block on the moving mold core that is closed with the second fixed mold core can be pushed to move away from the moving mold cavity.
2. The two-color injection mold according to claim 1, characterized in that, The clamping block is provided with a first driving part and a second driving part; The fixed mold is provided with a third driving part that cooperates with the first driving part at a position corresponding to the first fixed mold core. When the fixed mold and the moving mold are closed, the clamping block on the corresponding moving mold core is driven to move towards the moving mold cavity through the cooperation between the third driving part and the first driving part. The second fixed mold core is provided with a fourth driving part that cooperates with the second driving part. When the fixed mold and the moving mold are closed, the fourth driving part cooperates with the second driving part to drive the clamping block on the corresponding moving mold core to move away from the moving mold cavity.
3. The two-color injection mold according to claim 2, characterized in that, The clamping block includes a sliding part for slidingly engaging with the moving mold core, a cantilever structure extending out toward the moving mold cavity and disposed on the clamping part, and a driving part disposed on the sliding part and protruding toward the fixed mold. The first driving part and the second driving part are a first driving surface and a second driving surface disposed opposite to each other on the driving part, and the first driving surface and the second driving surface are inclined surfaces oriented in opposite directions; The fixed mold is provided with a first recess for the drive part to extend into, and the third drive part is a third drive surface located on the first recess, and the third drive surface and the first drive surface are in contact. The second fixed mold core is provided with a second recess for the drive part to extend into, and the fourth drive part is a fourth drive surface located on the second recess, and the fourth drive surface and the second drive surface are engaged. The fixed mold has a third recess at the location of the second fixed mold core, into which the driving part extends. The third recess provides space for the driving part to move in a direction away from the moving mold cavity.
4. The two-color injection mold according to any one of claims 1, 2, or 3, characterized in that, It also includes a limiting mechanism, which is used to limit the sliding of the clamping block on the moving mold core. When the clamping block slides under the action of an external force, the limiting mechanism can release the restriction on the clamping block under the action of the force applied by the clamping block.
5. The two-color injection mold according to claim 4, characterized in that, The limiting mechanism includes a first limiting member and an elastic reset member. The first limiting member is slidably engaged with the moving mold core, enabling the first limiting member to move in the vertical direction. The elastic reset member is used to provide a force to the first limiting member to move in the direction of the clamping block. The first limiting member is provided with a first limiting part, and the clamping block is provided with a second limiting part that cooperates with the first limiting part. The cooperation between the first limiting part and the second limiting part can limit the clamping block in the position of fixing a shot product and in the position of releasing the fixing of a shot product.
6. The two-color injection mold according to claim 5, characterized in that, The first limiting part is a protrusion provided on the first limiting member, and the second limiting part is two grooves provided on the bottom surface of the pressing block. When the protrusion extends into the groove, it can limit the pressing block, and when the pressing block is subjected to a sliding force, the protrusion can dislodge from the groove.
7. The two-color injection mold according to claim 6, characterized in that, Along the sliding direction, the protrusion and the groove are provided with opposing wedge-shaped surfaces.
8. The two-color injection mold according to claim 5, characterized in that, The limiting mechanism includes a limiting plate disposed on the moving mold core, a limiting hole provided on the limiting plate, a first limiting member disposed in the limiting hole, and an elastic reset member being a wave screw fixedly disposed on the first limiting member, the other end of the wave screw abutting against the moving mold.