A multi-step one-shot molding die

Abstract

The application discloses a multi-step one-time forming die, which comprises a main sliding block and a forming cavity located on one side of the main sliding block, the forming cavity is suitable for forming a forming part, a movable channel is formed in the main sliding block and is communicated with the forming cavity, a secondary sliding block is arranged in the movable channel and is slidable, one end of the secondary sliding block is suitable for extending into the forming cavity and dividing the forming cavity, so that part of the forming cavity forms a first cavity, and the secondary sliding block is suitable for retreating into the movable channel, so that the remaining forming cavity and part of the movable channel cooperatively form a second cavity which is connected with the first cavity, the application has the characteristics of convenient and efficient production and strong applicability, can form two kinds of materials or two kinds of colors into one product, and increases the diversification of products.

Description

Technical Field

[0001] This application relates to the field of mold equipment technology, specifically to a multi-step one-time molding mold. Background Technology

[0002] Injection molds are steel tools used to inject, cool, and shape molten plastic into the final part. One type of injection molding process is multi-component injection molding, also known as multi-color injection molding. This process involves injecting two or more colors of material or different materials into a mold with one or more runners.

[0003] However, existing multi-component injection molding dies have the following drawbacks: Two-color molds usually have two sets of molds. One half is mounted on the fixed mold platen of the two-color injection molding machine, which is the side with the injection gate, and the other half is mounted on the moving mold rotating platen, which is the side where the mold is ejected. The rear molds of the two sets of molds are usually exactly the same, while the front molds are different. By changing the front mold, the semi-finished product and the finished product are formed in sequence. This molding method is inefficient, costly, and the mold occupies a large space. Utility Model Content

[0004] One objective of this application is to provide a multi-step one-time molding die that is convenient, efficient, and widely applicable in production.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a multi-step one-time molding mold, comprising a main slider and a molding cavity located on one side of the main slider, the molding cavity being adapted to mold a part, the main slider having an active channel communicating with the molding cavity, a slidable secondary slider being disposed within the active channel, one end of the secondary slider being adapted to extend into the molding cavity and divide the molding cavity, such that a portion of the molding cavity forms a first cavity, the secondary slider being adapted to retract into the active channel, such that the remaining molding cavity and a portion of the active channel cooperate to form a second cavity that engages with the first cavity.

[0006] In some embodiments, the first cavity and the second cavity have a plurality of contact surfaces, and each contact surface engages the first cavity and the second cavity in a different direction.

[0007] In some embodiments, one end of the secondary slider is provided with a protruding blocking portion, the blocking portion being spaced apart from the side near the first cavity and the corresponding side of the movable channel, and when one end of the secondary slider extends into the molding cavity, the blocking portion is adapted to close the remaining molding cavity.

[0008] In some embodiments, the distance between the blocking portion near the first cavity and the corresponding side of the active channel is not less than half the width of the active channel.

[0009] In some embodiments, the included angle between adjacent contact surfaces is greater than 90°.

[0010] In some embodiments, the side of the active channel near the first cavity protrudes in a first direction from the side of the active channel near the second cavity.

[0011] In some embodiments, when one end of the secondary slider extends into the molding cavity, the side of the secondary slider near the first cavity engages with the corresponding side of the movable channel; when the secondary slider retracts into the movable channel, the side of the secondary slider near the second cavity engages with the corresponding side of the movable channel.

[0012] In some embodiments, a secondary driving device is provided on the main slider. The secondary driving device includes a first slider, a second slider, and a secondary driver. The first slider, the second slider, and the secondary driver are sequentially connected to the other end of the secondary slider. The first slider is arranged along a first direction of sliding of the secondary slider, and the second slider is arranged along a second direction of driving of the secondary driver. The first slider and the second slider are adapted to adapt to the first direction and the second direction to slide at an angle.

[0013] In some embodiments, the main slider is provided with a main drive device, the main drive device including a main driver fixed to the outside, the main driver being adapted to operate after the secondary drive device, and the main driver being adapted to drive the main slider away from the molding part.

[0014] In some embodiments, the molded part has a surface structure, and the sliding direction of the secondary slider is perpendicular to the surface of the molded part; the first cavity is molded with a rigid material, and the second cavity is molded with a flexible material.

[0015] Compared with the prior art, the beneficial effects of this application are as follows: The molding die of this application integrates a secondary slider structure on the main slider, so that the shape and structure of the molding cavity can change and switch with the movement of the secondary slider, thereby realizing step-by-step injection molding within the same mold. Compared with using multiple molds to mold products sequentially, this application can achieve rapid production with a single mold, without the need for mold opening and changing steps, and has a smaller size, making production more convenient and efficient. It can meet the different production needs of multi-component injection molded products and improve product diversification. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the first cavity during injection molding according to a preferred embodiment of this application.

[0017] Figure 2 This is a schematic diagram of the second cavity during injection molding according to a preferred embodiment of this application.

[0018] Figure 3 This is a schematic diagram of the molding of the first cavity according to a preferred embodiment of this application.

[0019] Figure 4 This is a molding schematic diagram of a preferred embodiment of the present application where the first cavity and the second cavity have two contact surfaces.

[0020] Figure 5 This is a molding schematic diagram of a preferred embodiment of the present application, where the first cavity and the second cavity have four contact surfaces.

[0021] In the figure: 1. Main slider; 11. Molding cavity; 111. First cavity; 112. Second cavity; 113. Contact surface; 12. Movable channel; 2. Molded part; 3. Secondary slider; 31. Blocking part; 4. Secondary drive device; 41. First slider; 42. Secondary slider; 43. Secondary driver; 5. Main drive device; 51. Main driver. Detailed Implementation

[0022] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0023] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. They should not be construed as limiting the specific protection scope of this application.

[0024] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0025] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0026] The following description, in conjunction with the accompanying drawings, further illustrates this application: like Figures 1 to 5 As shown, this application provides a multi-step one-time molding die, including a main slider 1 and a molding cavity 11 located on one side of the main slider 1. Normally, the main slider 1 is adapted to cooperate with the moving mold and the fixed mold to form the molding cavity 11. The molding cavity 11 is adapted to form the molded part 2. The main slider 1 has an active channel 12 communicating with the molding cavity 11. A slidable secondary slider 3 is provided in the active channel 12. One end of the secondary slider 3 is adapted to extend into the molding cavity 11 and divide the molding cavity 11, so that part of the molding cavity 11 forms a first cavity 111. After the molding cavity 11 is divided by the secondary slider 3, there is still space left in the molding cavity 11. When the secondary slider 3 retracts into the active channel 12, the remaining molding cavity 11 and part of the active channel 12 are adapted to cooperate to form a second cavity 112 that engages with the first cavity 111.

[0027] It is understandable that this application achieves two-step or even multi-step molding of the product by adjusting the molding sequence of different parts of the molding cavity 11 through the secondary slider 3. This application is preferably applied to the molding of automotive trim panels. Automotive trim panels are mostly surface structures. Considering that if the first cavity 111 and the second cavity 112 are simply joined together using the original molding cavity 11, the joint area between the product molded in the first cavity 111 and the product molded in the second cavity 112 is small, the connection strength between the two is low, the structural stability is poor, and separation is likely to occur. Therefore, this application utilizes part of the space of the movable channel 12 to allow the product molded in the second cavity 112 to overlap and cover the edge of the product molded in the first cavity 111, thereby increasing the contact joint area of ​​the two parts and thus improving the stability of the finished molded part 2.

[0028] When the molded part 2 has a surface structure, the sliding direction of the secondary slider 3 is perpendicular to the surface of the molded part 2, so that the first cavity 111 and the second cavity 112 can be overlapped in the thickness direction of the molded part 2, thereby improving the structural compactness of the molded part 2.

[0029] In some embodiments, the first cavity 111 and the second cavity 112 have a plurality of contact surfaces 113, and each contact surface 113 engages the first cavity 111 and the second cavity 112 in different directions, so that the product in the first cavity 111 and the product in the second cavity 112 can be combined in multiple directions, and the bonding force in other directions can overcome the shear force generated in the current direction, thereby effectively reducing the probability of separation.

[0030] like Figure 3 and 4In the embodiment shown, there are two contact surfaces 113 between the first cavity 111 and the second cavity 112. The design of the two contact surfaces 113 can not only ensure the bonding strength of the product in the first cavity 111 and the product in the second cavity 112, but also reduce the design difficulty and complexity of the mold and facilitate its use.

[0031] like Figure 5 In the embodiment shown, there are four contact surfaces 113 between the first cavity 111 and the second cavity 112. It is understood that reasonably increasing the number of contact surfaces 113 can further improve the bonding strength between the product in the first cavity 111 and the product in the second cavity 112.

[0032] like Figure 3 and 4 In the embodiment shown, one end of the secondary slider 3 is provided with a protruding blocking part 31. The blocking parts 31 are spaced apart on the side near the first cavity 111 and the corresponding side of the movable channel 12. When one end of the secondary slider 3 extends into the molding cavity 11, the blocking part 31 is suitable for closing the remaining molding cavity 11. Compared with directly closing the remaining molding cavity 11 using one end of the secondary slider 3, the blocking part 31 with its protruding design can reduce the difficulty of closing, improve the sealing accuracy, and prevent liquid from flowing out. At the same time, the design of the blocking part 31 can also make the first cavity 111 and the second cavity 112 join in the movable channel 12, thereby realizing the overlapping and joining of the products in the two cavities.

[0033] like Figure 3 and 4 In the illustrated embodiment, the distance between the blocking part 31 near the first cavity 111 and the corresponding side of the active channel 12 is not less than half the width of the active channel 12. It can be understood that the distance between the blocking part 31 near the first cavity 111 and the corresponding side of the active channel 12 determines the overlap range of the product in the first cavity 111 and the product in the second cavity 112. The larger the distance, the larger the overlap range and the higher the bonding strength between them. Therefore, this application ensures the overall structural strength and structural stability of the molded part 2 by setting this distance.

[0034] like Figures 4 to 5 In the embodiment shown, the included angle α between adjacent contact surfaces 113 is greater than 90°, which can disperse the shear force borne by the adjacent contact surfaces 113, effectively improve the bonding strengthening effect between adjacent contact surfaces 113, and thus increase the overall bonding strength.

[0035] like Figures 1 to 5In the embodiment shown, the active channel 12 protrudes from the side of the active channel 12 near the first cavity 111 in a first direction, which is the sliding direction of the secondary slider 3. This design can reduce the thickness of the product formed by the first cavity 111, and is suitable for the case where the first cavity 111 is formed of hard materials.

[0036] like Figure 3 and 4 In the embodiment shown, when one end of the secondary slider 3 extends into the molding cavity 11, the side of the secondary slider 3 near the first cavity 111 connects and cooperates with the corresponding side of the movable channel 12 to reduce the drop cross section of the product in the first cavity 111 and improve surface integrity and smoothness.

[0037] like Figure 3 and 4 In the embodiment shown, when the secondary slider 3 retracts into the movable channel 12, the side of the secondary slider 3 near the second cavity 112 engages with the corresponding side of the movable channel 12 to reduce the drop cross section of the product in the second cavity 112 and improve surface integrity and smoothness.

[0038] like Figure 1 and 2 In the illustrated embodiment, a secondary driving device 4 is provided on the main slider 1. The secondary driving device 4 includes a first slider 41, a second slider 42, and a secondary driver 43. The first slider 41, the second slider 42, and the secondary driver 43 are sequentially connected to the other end of the secondary slider 3. The first slider 41 is arranged in a first direction of sliding along the secondary slider 3, and the second slider 42 is arranged in a second direction of driving along the secondary driver 43. The first slider 41 and the second slider 42 are adapted to slide in an inclined manner to adapt to the first and second directions (slanted slider connection). This design can change the sliding direction of the secondary slider 3, so that the secondary driving device 4 is led out from different sides of the main slider 1, has a higher degree of freedom of arrangement, and does not interfere with the main driving device 5. The secondary driving device 4 is used for partial demolding of the product in the first cavity 111, and at the same time for forming the second cavity 112.

[0039] like Figure 1 and 2 In the embodiment shown, a main drive device 5 is provided on the main slider 1. The main drive device 5 includes a main driver 51 fixed to an external device (e.g., a fixed mold, a moving mold, etc.). The main driver 51 is adapted to run after the secondary drive device 4. The main driver 51 is adapted to drive the main slider 1 away from the molded part 2. The main drive device 5 is used for the overall demolding of the molded part 2.

[0040] In some embodiments, the secondary actuator 43 and the primary actuator 51 are hydraulic cylinders, electric cylinders, or pneumatic cylinders.

[0041] This application enables the molding and combination of two different materials and / or two different colors, improving the diversity of product appearance and structure, and making it suitable for more scenarios.

[0042] In some embodiments, the first cavity 111 is formed with a rigid material and serves as a base support, the second cavity 112 is formed with a flexible material and overlaps with the rigid material at the edge, and then the overall structure of the molded part 2 is supported by the rigid material, thereby achieving a stable composite structure.

[0043] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are only the principles of this application. Various changes and modifications can be made to this application without departing from the spirit and scope of this application. All such changes and modifications fall within the scope of this application as claimed. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A multi-step one-time molding die, characterized in that: The device includes a main slider and a molding cavity located on one side of the main slider. The molding cavity is adapted to mold a part. The main slider has a movable channel communicating with the molding cavity. A slidable secondary slider is provided in the movable channel. One end of the secondary slider is adapted to extend into the molding cavity and divide the molding cavity, so that part of the molding cavity forms a first cavity. The secondary slider is adapted to retract into the movable channel, so that the remaining molding cavity and part of the movable channel cooperate to form a second cavity that engages with the first cavity.

2. The multi-step one-time molding die as described in claim 1, characterized in that: The first cavity and the second cavity have multiple contact surfaces, and each contact surface engages the first cavity and the second cavity in a different direction.

3. The multi-step one-time molding die as described in claim 2, characterized in that: One end of the secondary slider is provided with a protruding blocking part. The blocking part is distributed at intervals on the side near the first cavity and the corresponding side of the movable channel. When one end of the secondary slider extends into the molding cavity, the blocking part is adapted to close the remaining molding cavity.

4. The multi-step one-time molding die as described in claim 3, characterized in that: The distance between the blocking part near the first cavity and the corresponding side of the active channel is not less than half the width of the active channel.

5. A multi-step one-time molding die as described in claim 2, characterized in that: The included angle between adjacent contact surfaces is greater than 90°.

6. The multi-step one-time molding die as described in claim 1, characterized in that: The active channel protrudes from the side of the active channel near the first cavity in a first direction from the side of the active channel near the second cavity.

7. The multi-step one-time molding die as described in claim 1, characterized in that: When one end of the secondary slider extends into the molding cavity, the side of the secondary slider near the first cavity engages with the corresponding side of the movable channel; when the secondary slider retracts into the movable channel, the side of the secondary slider near the second cavity engages with the corresponding side of the movable channel.

8. The multi-step one-time molding die as described in claim 1, characterized in that: The main slider is provided with a secondary driving device, which includes a first slider, a second slider and a secondary driver. The first slider, the second slider and the secondary driver are sequentially connected to the other end of the secondary slider. The first slider is arranged along a first direction of sliding of the secondary slider, and the second slider is arranged along a second direction of driving of the secondary driver. The first slider and the second slider are adapted to slide in an inclined manner to adapt to the first direction and the second direction.

9. A multi-step one-time molding die as described in claim 8, characterized in that: The main slider is provided with a main drive device, which includes a main driver fixed to the outside. The main driver is adapted to operate after the secondary drive device and is adapted to drive the main slider away from the forming part.

10. A multi-step one-time molding die as described in claim 1, characterized in that: The molded part has a surface structure, and the sliding direction of the secondary slider is perpendicular to the surface of the molded part; the first cavity is molded with a rigid material, and the second cavity is molded with a flexible material.

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