Mold and injection molding method

Abstract

The application relates to a mold and an injection molding method, wherein the mold comprises: a back mold assembly, the back mold assembly comprising a back mold structure and a limiting pressing structure, the back mold structure being provided with a product placing part, the limiting pressing structure being movably arranged on the back mold structure so that the back mold structure moves between a avoiding position and a pressing position, and the projection of the limiting pressing structure along the moving direction of the limiting pressing structure partially overlaps with the product placing part; and a front mold assembly, the front mold assembly being matched with the back mold assembly, and the front mold assembly and the back mold assembly having an injection molding position and an opening mold position. The technical scheme of the application effectively solves the problem of abnormal injection molding of the terminal of the connecting wire and the plastic part in the prior art.

Description

Technical Field

[0001] This application relates to the technical field of molds, and more specifically, to a mold and an injection molding method. Background Technology

[0002] In electronic products, the connector terminals and plastic parts of the connecting wires are connected together by injection molding. The method of injection molding the connector terminals and plastic parts into one piece typically involves embedding the connector terminals and plastic parts into a male mold, followed by compression molding.

[0003] When the connecting wire is embedded in the mold, problems such as incomplete or misaligned embedding may occur. This can lead to abnormal molding of the connecting wire terminals and plastic parts during injection molding. Summary of the Invention

[0004] This application provides a mold and injection molding method to solve the problem of abnormal injection molding of terminals and plastic parts of connecting wires in the prior art.

[0005] This application provides a mold, including: a rear mold assembly, the rear mold assembly including a rear mold structure and a limiting and pressing structure, the rear mold structure having a product placement part, the limiting and pressing structure being movably disposed on the rear mold structure so that the rear mold structure can move in an avoidance position and a pressing position, the projection of the limiting and pressing structure along the moving direction of the limiting and pressing structure partially overlaps with the product placement part; and a front mold assembly, the front mold assembly cooperating with the rear mold assembly, the front mold assembly and the rear mold assembly having an injection position and a mold opening position.

[0006] Furthermore, the rear mold assembly also includes a positioning structure located within the rear mold structure, and the limiting and pressing structure has a mating part that cooperates with the positioning structure.

[0007] Furthermore, the rear mold structure includes a rear template and a rear mold core. The rear template has a receiving portion, and the rear mold core is located within the receiving portion. The rear mold core has a through hole, and a limiting and pressing structure is movably disposed within the through hole. The sidewall of the through hole has a positioning structure mounting hole, and the positioning structure is installed within the positioning structure mounting hole. The positioning structure portion is located within the through hole.

[0008] Furthermore, the positioning structure includes a housing, an elastic element, and a ball. The housing has a mounting groove with the opening facing the limiting and pressing structure. The ball portion is located within the mounting groove and the ball portion is located within the through hole. The elastic element is located within the mounting groove between the ball and the bottom wall of the mounting groove.

[0009] Furthermore, the mating part includes multiple positioning grooves, which are spaced apart along the moving direction of the limiting and pressing structure.

[0010] Furthermore, the rear mold structure also includes a rear mold insert located within the rear mold core. The limiting and pressing structure includes a moving block and a pressing part, with the pressing part located at one end of the moving block near the front mold assembly and extending toward the rear mold insert.

[0011] Furthermore, the rear mold insert has a placement groove, and the pressing part is a pressing block. The projection of the pressing block along the moving direction of the limiting pressing structure is located in the placement groove.

[0012] Furthermore, the movable block is wedge-shaped, and its cross-sectional area gradually decreases along the direction from approaching to moving away from the front mold assembly. The through hole is wedge-shaped to fit the movable block.

[0013] Furthermore, the planar cutting moving block in the vertical limiting and pressing structure's moving direction is T-shaped.

[0014] According to another aspect of this application, an injection molding method is also provided. The injection molding method uses the above-described mold and includes: placing a connecting wire into a product placement section; moving a limiting and pressing structure from a clearance position to a pressing position; placing the plastic part and the terminal of the connecting wire corresponding to each other; and closing the front mold assembly and the rear mold assembly for injection molding.

[0015] By applying the technical solution of this application, when the connecting wire is placed in the product placement section, the limiting and pressing structure acts as a limit for the connecting wire. The limiting and pressing structure moves from a clearance position to a pressing position, thus preventing the connecting wire from being improperly embedded or misaligned under the action of the limiting and pressing structure. Furthermore, the limiting and pressing structure also provides a fixing function for the connecting wire. When the plastic part corresponds to the terminal of the connecting wire, the alignment between the terminal of the connecting wire and the plastic part is good, thus preventing abnormal problems during injection molding of the terminal of the connecting wire and the plastic part. The technical solution of this application effectively solves the problem of abnormal injection molding of the terminal of the connecting wire and the plastic part in the prior art. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A three-dimensional structural schematic diagram of the mold according to an embodiment of this application is shown;

[0019] Figure 2 It shows Figure 1 A partial structural diagram of the mold;

[0020] Figure 3 It shows Figure 2 A top view of the mold;

[0021] Figure 4 It shows Figure 3 A schematic diagram of the mold in a C-C section;

[0022] Figure 5 It shows Figure 1 A partial structural diagram of the rear mold assembly of the mold;

[0023] Figure 6 It shows Figure 5 A schematic diagram of the cooperation structure between the limiting and pressing structure and the positioning structure;

[0024] Figure 7 It shows Figure 6 A partial structural diagram of the limiting and compressing structure;

[0025] Figure 8 It shows Figure 6 A three-dimensional structural diagram of the positioning structure;

[0026] Figure 9 It shows Figure 8 A cross-sectional view of the positioning structure.

[0027] The above figures include the following reference numerals:

[0028] 10. Rear mold assembly; 11. Rear mold structure; 111. Rear template; 112. Rear mold core; 113. Rear mold insert; 12. Limiting and pressing structure; 121. Moving block; 122. Pressing part; 123. Mating part; 13. Positioning structure; 131. Shell; 132. Elastic element; 133. Ball bearing; 14. Support body; 20. Front mold assembly; 100. Connecting line; 200. Plastic part. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0031] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, rotated 90 degrees, or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0032] like Figures 1 to 9 As shown, the mold in this embodiment includes a rear mold assembly 10 and a front mold assembly 20. The rear mold assembly 10 includes a rear mold structure 11 and a limiting and pressing structure 12. The rear mold structure 11 has a product placement portion. The limiting and pressing structure 12 is movably disposed on the rear mold structure 11 so that the rear mold structure 11 can move between a clearance position and a pressing position. The projection of the limiting and pressing structure 12 along the moving direction of the limiting and pressing structure 12 partially overlaps with the product placement portion. The front mold assembly 20 cooperates with the rear mold assembly 10, and the front mold assembly 20 and the rear mold assembly 10 have an injection position and a mold opening position.

[0033] Applying the technical solution of this embodiment, when the connecting wire 100 is placed in the product placement section, the limiting and pressing structure 12 limits the connecting wire 100. The limiting and pressing structure 12 moves from a clearance position to a pressing position, thus preventing the connecting wire 100 from being improperly inserted or misaligned under the action of the limiting and pressing structure 12. Furthermore, the limiting and pressing structure 12 also provides a fixing function for the connecting wire 100. When the plastic part 200 is placed corresponding to the terminals of the connecting wire 100, the correspondence between the terminals of the connecting wire 100 and the plastic part 200 is good, thus preventing abnormal problems during injection molding of the terminals of the connecting wire 100 and the plastic part 200. The technical solution of this embodiment effectively solves the problem of abnormal injection molding of the terminals of the connecting wire and the plastic part in the prior art.

[0034] It should be noted that the rear mold assembly 10 can also be called the male mold assembly or the fixed mold assembly; the front mold assembly 20 can also be called the female mold assembly or the moving mold assembly. Generally speaking, plastic mold structures are classified by function as follows: gating system, temperature control system, molding parts system, venting system, guiding system, and ejection system, etc. This embodiment only describes the improved parts; the remaining parts will not be elaborated upon.

[0035] like Figures 5 to 9 As shown, in the technical solution of this embodiment, the rear mold assembly 10 further includes a positioning structure 13, which is located within the rear mold structure 11. The limiting and pressing structure 12 has a mating part 123 that cooperates with the positioning structure 13. The above structure makes the positioning of the limiting and pressing structure 12 more accurate, and the limiting and pressing structure 12 is less prone to loosening.

[0036] like Figures 5 to 9 As shown, in this embodiment, the rear mold structure 11 includes a rear template 111 and a rear mold core 112. The rear template 111 has a receiving portion, and the rear mold core 112 is located within the receiving portion. The rear mold core 112 has a through hole, and a limiting and pressing structure 12 is movably disposed within the through hole. The sidewall of the through hole has a positioning structure mounting hole, and a positioning structure 13 is installed within the positioning structure mounting hole, with a portion of the positioning structure 13 located within the through hole. The above structure is compact and occupies little space. In this embodiment, the through hole is provided by the rear mold core 112 itself, and the limiting and pressing structure 12 is disposed within the through hole, avoiding the need for other auxiliary structures. The through hole penetrates the upper and lower surfaces of the rear mold core 112, making the limiting and pressing structure 12 easy to operate, for example, by providing an ejection structure in the direction away from the front mold assembly 20 of the limiting and pressing structure 12.

[0037] like Figure 6 , Figure 8 and Figure 9 As shown, in this embodiment, the positioning structure 13 includes a housing 131, an elastic element 132, and a ball bearing 133. The housing 131 has a mounting groove, the opening of which faces the limiting and pressing structure 12. Part of the ball bearing 133 is located within the mounting groove, and another part is located within the through hole. The elastic element 132 is located within the mounting groove between the ball bearing 133 and the bottom wall of the mounting groove. This structure is ingeniously designed and easy to operate. The elastic force of the elastic element 132 causes the ball bearing 133 to automatically engage with the mating part 123. It should be noted that the inner diameter of the opening of the mounting groove is 4 / 5 of the outer diameter of the ball bearing 133, and the inner diameter of the mounting groove is slightly larger than the outer diameter of the ball bearing 133, specifically by 0.5mm to 1mm.

[0038] like Figures 7 to 9 As shown, in this embodiment, the mating part 123 includes multiple positioning grooves, which are spaced apart along the moving direction of the limiting and pressing structure 12. This structure has low processing cost and is easy to operate. It should be noted that the multiple positioning grooves are located on the same side of the limiting and pressing structure 12. In this embodiment, the limiting and pressing structure 12 has multiple positioning grooves on both opposite sides. Each side has two positioning grooves; the upper positioning groove corresponds to the avoidance position, and the lower positioning groove corresponds to the pressing position. The distance between the two positioning grooves can be changed, ranging from 1mm to 8mm.

[0039] like Figures 2 to 5 As shown, in this embodiment, the rear mold structure 11 further includes a rear mold insert 113, which is located within the rear mold core 112. The limiting and pressing structure 12 includes a moving block 121 and a pressing part 122. The pressing part 122 is located at the end of the moving block 121 near the front mold assembly 20 and extends towards the rear mold insert 113. This structure allows the limiting and pressing structure 12 to both limit and press the connecting line 100 without interfering with other components, such as the mating structure between the plastic part 200 and the terminal of the connecting line 100.

[0040] like Figures 2 to 5 As shown, in this embodiment, the rear mold insert 113 has a placement groove, and the pressing part 122 is a pressing block. The projection of the pressing block along the moving direction of the limiting pressing structure 12 is located within the placement groove. The placement groove can provide initial positioning for the connecting line 100, thus minimizing the possibility of misalignment of the connecting line 100. It should be noted that the placement groove is a wedge shape that gradually narrows from the opening to the bottom. This ensures that if the connecting line 100 is misaligned, it is easier for the connecting line 100 to enter the placement groove under the combined action of the limiting pressing structure 12 and the placement groove. The width of the pressing block is adapted to the width of the bottom of the placement groove. The product placement groove is a through structure, meaning that the end of the placement groove near the rear mold core 112 is a through structure, which facilitates processing and operation. The pressing part 122 can press the product by moving downwards, effectively preventing deformation of the product after it is placed in the mold. The width of the pressing block is between 1mm and 5mm.

[0041] like Figures 2 to 7 As shown, in this embodiment, the movable block 121 is wedge-shaped, and its cross-sectional area gradually decreases along the direction from approaching to moving away from the front mold assembly 20. The through hole is wedge-shaped and adapted to the movable block 121. This structure makes the movable block 121 easy to move and avoids jamming during movement. It should be noted that when the limiting and pressing structure 12 is in the pressing position, the limiting and pressing structure 12 completely fills the through hole.

[0042] like Figure 7As shown, in the technical solution of this embodiment, the planar cutting moving block 121 of the vertical limiting and pressing structure 12 in the moving direction is T-shaped. The above structure ensures that the moving accuracy of the limiting and pressing structure 12 is relatively high. It should be noted that the rear mold structure 11 also includes a support body 14, which has a support groove. The rear mold core 112 has a support mounting part, and the support body 14 is installed in the support mounting part. The above structure ensures that the wire part of the connecting line 100 is not prone to misalignment or that the suction is more firm during negative pressure suction. The width of the support groove gradually increases in the direction away from the front mold assembly 20 and towards the front mold assembly 20. The above structure makes the product positioned correctly and the product is not prone to deformation. The support body has negative pressure through holes, which have the function of suctioning the product.

[0043] This application also provides an injection molding method using the aforementioned mold. The injection molding method includes: placing the connecting wire 100 into the product placement section; moving the limiting and pressing structure 12 from a clearance position to a pressing position; placing the plastic part 200 corresponding to the terminal of the connecting wire 100; and closing the front mold assembly 20 and the rear mold assembly 10 for injection molding.

[0044] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0045] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0046] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A mold characterized in that, The application relates to a mold assembly. The mold assembly comprises a rear mold assembly (10) and a front mold assembly (20), the rear mold assembly (10) comprises a rear mold structure (11) and a limiting and pressing structure (12), the rear mold structure (11) has a product placing part, and the limiting and pressing structure (12) is movably arranged on the rear mold structure (11) to move the limiting and pressing structure (12) to an avoiding position and a pressing position, and a projection of the limiting and pressing structure (12) along a moving direction of the limiting and pressing structure (12) partially overlaps the product placing part. The front mold assembly (20) is matched with the rear mold assembly (10), and the front mold assembly (20) and the rear mold assembly (10) have an injection position and an opening position. The rear mold assembly (10) further comprises a positioning structure (13) arranged in the rear mold structure (11), and the limiting and pressing structure (12) has a matching part (123) matched with the positioning structure (13). The rear mold structure (11) comprises a rear mold plate (111) and a rear mold core (112), the rear mold plate (111) has a containing part, the rear mold core (112) is arranged in the containing part, the rear mold core (112) has a through hole, the limiting and pressing structure (12) is movably arranged in the through hole, a side wall of the through hole has a positioning structure mounting hole, the positioning structure (13) is mounted in the positioning structure mounting hole, and the positioning structure (13) is partially arranged in the through hole.

2. The mold of claim 1, wherein The positioning structure (13) comprises a shell (131), an elastic piece (132) and a ball (133), the shell (131) has a mounting groove, an opening of the mounting groove faces the limiting and pressing structure (12), the ball (133) is partially arranged in the mounting groove, the ball (133) is partially arranged in the through hole, and the elastic piece (132) is arranged in the mounting groove between the ball (133) and a bottom wall of the mounting groove.

3. The mold of claim 2, wherein, The matching part (123) comprises a plurality of positioning grooves, and the plurality of positioning grooves are arranged at intervals along the moving direction of the limiting and pressing structure (12).

4. The mold of claim 1, wherein The rear mold structure (11) further comprises a rear mold insert (113) arranged in the rear mold core (112), the limiting and pressing structure (12) comprises a moving block (121) and a pressing part (122), the pressing part (122) is arranged at one end of the moving block (121) close to the front mold assembly (20), and the pressing part (122) extends towards the rear mold insert (113).

5. The mold of claim 4, wherein, The rear mold insert (113) has a placing groove, and the pressing part (122) is a pressing block, and a projection of the pressing block along the moving direction of the limiting and pressing structure (12) is arranged in the placing groove.

6. The mold of claim 4, wherein, The moving block (121) is wedge-shaped, a cross-sectional area of the moving block (121) gradually decreases along a direction close to and away from the front mold assembly (20), and the through hole is wedge-shaped and matched with the moving block (121).

7. The mold of claim 4, wherein The movement block (121) is cut by a plane perpendicular to the movement direction of the limiting pressing structure (12) into a T shape.

8. A method of injection molding, characterized in that, The injection molding method adopts the mold according to any one of claims 1 to 7, and the injection molding method comprises: Placing the connecting line (100) into the product placing part; Moving the limiting pressing structure (12) from the avoiding position to the pressing position; Placing the plastic part (200) corresponding to the terminal of the connecting line (100); Molding injection of the front mold assembly (20) and the rear mold assembly (10).

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