A type of injection mold for casing overmolding

Abstract

This utility model provides a casing overmolding injection mold, belonging to the field of mold technology. It includes: a fixed mold plate with a first mold core having a first forming part; a movable mold plate that can be close to or away from the fixed mold plate, with a second mold core having a second forming part; the first mold core also has a first parting part close to the first forming part, and the second mold core also has a second parting part close to the second forming part. The beneficial effect of this utility model is that by setting the first parting part on the first mold core near the first forming part, and setting the second parting part on the second mold core near the second forming part, the position of the partial parting surface is changed, thereby reducing the product assembly gap and eliminating steps on the product surface.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a casing overmolding injection mold. Background Technology

[0002] Deformation of injection molded products is a common problem. Factors such as product structure, improper mold cooling, unreasonable gate location, raw material properties, and injection molding process parameters can all affect product deformation. Some products, such as the two shells of a brushless drill housing, develop gaps after production, indicating significant room for improvement. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a casing overmolding injection mold.

[0004] The objective of this utility model can be achieved through the following technical solution: a casing overmolding injection mold, comprising:

[0005] A template is provided, which has a first mold core, and the first mold core is provided with a first forming part;

[0006] A movable template that can move closer to or further away from the fixed template; the movable template is provided with a second mold core; the second mold core is provided with a second forming part; when the movable template and the fixed template are closed, a cavity is formed between the first forming part and the second forming part.

[0007] The first mold core is also provided with a first parting part, which is close to the first forming part. The second mold core is also provided with a second parting part, which is close to the second forming part. When the moving mold plate and the fixed mold plate are closed, the first parting part and the second parting part come into contact.

[0008] In the aforementioned injection mold for overmolding a housing, the first parting portion is a parting protrusion, and the second parting portion is a parting recess, wherein the parting protrusion can be inserted into the parting recess.

[0009] In the aforementioned injection mold for overmolding a housing, the parting protrusion includes a first protrusion contact surface, a protrusion positioning surface, and a second protrusion contact surface. The protrusion positioning surface is located between the first protrusion contact surface and the second protrusion contact surface. The parting recess includes a first recess contact surface, a recess positioning surface, and a second recess contact surface. The recess positioning surface is located between the first recess contact surface and the second recess contact surface. The first protrusion contact surface can contact the first recess contact surface, the protrusion positioning surface can contact the recess positioning surface, and the second protrusion contact surface can contact the second recess contact surface.

[0010] In the aforementioned injection mold for overmolding a housing, the raised positioning surface is a first inclined surface, and the recessed positioning surface is a second inclined surface.

[0011] In the aforementioned casing overmolding injection mold, the height of the first protruding contact surface gradually decreases from near the protruding positioning surface to far away from the protruding positioning surface, and the depth of the first recessed contact surface gradually decreases from near the recessed positioning surface to far away from the recessed positioning surface.

[0012] In the aforementioned casing overmolding injection mold, the height of the second protruding contact surface gradually decreases from near the protruding positioning surface to far away from the protruding positioning surface, and the depth of the second recessed contact surface gradually decreases from near the recessed positioning surface to far away from the recessed positioning surface.

[0013] In the aforementioned injection mold for overmolding a housing, the width of the first protruding contact surface gradually decreases from near the protruding positioning surface to away from the protruding positioning surface, and the width of the first recessed contact surface gradually decreases from near the recessed positioning surface to away from the recessed positioning surface.

[0014] In the aforementioned casing overmolding injection mold, the width of the second protruding contact surface gradually decreases from near the protruding positioning surface to away from the protruding positioning surface, and the width of the second recessed contact surface gradually decreases from near the recessed positioning surface to away from the recessed positioning surface.

[0015] In the aforementioned injection mold for overmolding a housing, the first forming part is a forming recess, and the second forming part is a forming protrusion, wherein the forming protrusion can be inserted into the forming recess.

[0016] In the aforementioned injection mold for overmolding a housing, the first mold core is further provided with a positioning recess, and the second mold core is further provided with a positioning protrusion, wherein the positioning protrusion can be inserted into the positioning recess.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. By setting a first parting part on the first mold core near the first forming part and setting a second parting part on the second mold core near the second forming part, the position of the partial parting surface is changed, thereby reducing the product assembly gap and making the product surface free of steps.

[0019] 2. When the moving template and the fixed template are closed, the first protruding contact surface contacts the first recessed contact surface, the protruding positioning surface contacts the recessed positioning surface, and the second protruding contact surface contacts the second recessed contact surface.

[0020] 3. The raised positioning surface is the first inclined surface and the recessed positioning surface is the second inclined surface. Therefore, the contact area is larger than that of the horizontal surface, and it can also play a certain guiding role.

[0021] 4. The parting protrusion is close to the forming recess, and the parting recess is close to the forming protrusion, making the parting effect more obvious on the original basis.

[0022] 5. When the moving template and the fixed template are closed, the positioning protrusion is inserted into the positioning recess to position the first mold core and the second mold core during mold closing, ensuring the mold closing effect and parting effect, and preventing displacement. Attached Figure Description

[0023] Figure 1 This is an exploded view of the injection mold for overmolding the casing of this utility model.

[0024] Figure 2 for Figure 1 An enlarged view of part A.

[0025] Figure 3 This is an exploded view of the casing overmolding injection mold of this utility model from another perspective.

[0026] Figure 4 for Figure 3 An enlarged view of part B.

[0027] Figure 5 This is a schematic diagram of the structure of the first mold core of this utility model.

[0028] Figure 6 This is a schematic diagram of the structure of the second mold core of this utility model.

[0029] In the figure, 100 is the first mold core; 110 is the forming recess; 120 is the parting protrusion; 121 is the first protrusion contact surface; 122 is the first inclined surface; 123 is the second protrusion contact surface; 130 is the positioning recess; 200 is the second mold core; 210 is the forming protrusion; 220 is the parting recess; 221 is the first recess contact surface; 222 is the second inclined surface; 223 is the second recess contact surface; and 230 is the positioning protrusion. Detailed Implementation

[0030] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0032] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0035] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0036] like Figures 1-6 As shown, a casing overmolding injection mold includes: a fixed template (not shown in the figure) and a movable template (not shown in the figure).

[0037] The template is provided with a first mold core 100, and the first mold core 100 is provided with a first forming part.

[0038] Specifically, the fixed mold is the part of the mold connected to the stationary part of the injection molding machine. It usually includes structures such as a gating system. The gating system includes the main runner, branch runners, and gates, which are responsible for guiding the molten plastic into each cavity.

[0039] The movable template can be close to or away from the fixed template. The movable template is provided with a second mold core 200. The second mold core 200 is provided with a second forming part. When the movable template and the fixed template are molded together, a cavity is formed between the first forming part and the second forming part.

[0040] Specifically, the moving mold plate is the part of the mold connected to the moving part of the injection molding machine, which is responsible for demolding from the plastic part when the mold is opened.

[0041] The first mold core 100 is further provided with a first parting part, which is close to the first forming part. The second mold core 200 is further provided with a second parting part, which is close to the second forming part. When the moving mold plate and the fixed mold plate are closed, the first parting part and the second parting part come into contact.

[0042] In this embodiment, by providing a first parting portion on the first mold core 100 near the first forming portion and a second parting portion on the second mold core 200 near the second forming portion, the position of the partial parting surface is changed, thereby reducing the product assembly gap and making the product surface free of steps.

[0043] like Figures 1-6 As shown, based on the above embodiment, the first parting part is a parting protrusion 120, and the second parting part is a parting recess 220, wherein the parting protrusion 120 can be inserted into the parting recess 220.

[0044] In this embodiment, the parting protrusion 120 can be formed by welding to the outside of the first mold core 100, and the parting recess 220 can be formed by reducing iron in the second mold core 200.

[0045] like Figures 1-6 As shown, based on the above embodiment, the parting protrusion 120 includes a first protrusion contact surface 121, a protrusion positioning surface, and a second protrusion contact surface 123. The protrusion positioning surface is located between the first protrusion contact surface 121 and the second protrusion contact surface 123. The parting recess 220 includes a first recess contact surface 221, a recess positioning surface, and a second recess contact surface 223. The recess positioning surface is located between the first recess contact surface 221 and the second recess contact surface 223. The first protrusion contact surface 121 can contact the first recess contact surface 221, the protrusion positioning surface can contact the recess positioning surface, and the second protrusion contact surface 123 can contact the second recess contact surface 223.

[0046] In this embodiment, when the moving template and the fixed template are closed, the first protruding contact surface 121 contacts the first recessed contact surface 221, the protruding positioning surface contacts the recessed positioning surface, and the second protruding contact surface 123 contacts the second recessed contact surface 223.

[0047] like Figures 1-6 As shown, based on the above embodiment, the protruding positioning surface is a first inclined surface 122, and the recessed positioning surface is a second inclined surface 222.

[0048] In this embodiment, the raised positioning surface is the first inclined surface 122 and the recessed positioning surface is the second inclined surface 222. Therefore, the contact area is larger than that of the horizontal surface, and it can also play a certain guiding role.

[0049] like Figures 1-6 As shown, based on the above embodiment, the height of the first protruding contact surface 121 gradually decreases from near the protruding positioning surface to away from the protruding positioning surface, and the depth of the first recessed contact surface 221 gradually decreases from near the recessed positioning surface to away from the recessed positioning surface.

[0050] In this embodiment, the height of the first raised contact surface 121 gradually decreases from near the raised positioning surface to far away from the raised positioning surface, and the depth of the first recessed contact surface 221 that matches it gradually decreases from near the recessed positioning surface to far away from the recessed positioning surface, so as to adapt well to the product structure and ensure the effect of overmolding.

[0051] like Figures 1-6 As shown, based on the above embodiment, the height of the second protruding contact surface 123 gradually decreases from near the protruding positioning surface to away from the protruding positioning surface, and the depth of the second recessed contact surface 223 gradually decreases from near the recessed positioning surface to away from the recessed positioning surface.

[0052] In this embodiment, the height of the second protruding contact surface 123 gradually decreases from near the protruding positioning surface to far away from the protruding positioning surface, and the depth of the matching second recessed contact surface 223 gradually decreases from near the recessed positioning surface to far away from the recessed positioning surface, thereby adapting well to the product structure and ensuring the effect of overmolding.

[0053] like Figures 1-6 As shown, based on the above embodiment, the width of the first protruding contact surface 121 gradually decreases from near the protruding positioning surface to away from the protruding positioning surface, and the width of the first recessed contact surface 221 gradually decreases from near the recessed positioning surface to away from the recessed positioning surface.

[0054] In this embodiment, the width of the first protruding contact surface 121 gradually decreases from near the protruding positioning surface to away from the protruding positioning surface, and the width of the first recessed contact surface 221 that matches it gradually decreases from near the recessed positioning surface to away from the recessed positioning surface, so as to adapt well to the product structure and ensure the effect of overmolding.

[0055] like Figures 1-6 As shown, based on the above embodiment, the width of the second protruding contact surface 123 gradually decreases from near the protruding positioning surface to away from the protruding positioning surface, and the width of the second recessed contact surface 223 gradually decreases from near the recessed positioning surface to away from the recessed positioning surface.

[0056] In this embodiment, the width of the second protruding contact surface 123 gradually decreases from near the protruding positioning surface to away from the protruding positioning surface, and the width of the second recessed contact surface 223 gradually decreases from near the recessed positioning surface to away from the recessed positioning surface, thereby adapting well to the product structure and ensuring the effect of overmolding.

[0057] like Figures 1-6 As shown, based on the above embodiment, the first forming part is a forming recess 110, and the second forming part is a forming protrusion 210, wherein the forming protrusion 210 can be inserted into the forming recess 110.

[0058] Specifically, the forming protrusion 210 can be inserted into the forming recess 110, so a cavity is formed between the forming protrusion 210 and the forming recess 110 when the moving template and the fixed template are closed.

[0059] In this embodiment, the parting protrusion 120 is close to the forming recess 110 and the parting recess 220 is close to the forming protrusion 210, making the parting effect more obvious on the original basis.

[0060] like Figures 1-6 As shown, based on the above embodiment, the first mold core 100 is further provided with a positioning recess 130, and the second mold core 200 is further provided with a positioning protrusion 230, wherein the positioning protrusion 230 can be inserted into the positioning recess 130.

[0061] In this embodiment, when the moving template and the fixed template are closed, the positioning protrusion 230 is inserted into the positioning recess 130, thereby positioning the first mold core 100 and the second mold core 200 at the time of mold closing, ensuring the mold closing effect and the parting effect, and preventing displacement.

Claims

1. A casing overmolding injection mold, characterized in that, include: A template is provided, which has a first mold core, and the first mold core is provided with a first forming part; A movable template that can move closer to or further away from the fixed template; the movable template is provided with a second mold core; the second mold core is provided with a second forming part; when the movable template and the fixed template are closed, a cavity is formed between the first forming part and the second forming part. The first mold core is also provided with a first parting part, which is close to the first forming part. The second mold core is also provided with a second parting part, which is close to the second forming part. When the moving mold plate and the fixed mold plate are closed, the first parting part and the second parting part come into contact.

2. The casing overmolding injection mold as described in claim 1, characterized in that: The first parting part is a parting protrusion, and the second parting part is a parting recess, wherein the parting protrusion can be inserted into the parting recess.

3. The casing overmolding injection mold as described in claim 2, characterized in that: The parting protrusion includes a first protrusion contact surface, a protrusion positioning surface, and a second protrusion contact surface. The protrusion positioning surface is located between the first protrusion contact surface and the second protrusion contact surface. The parting recess includes a first recess contact surface, a recess positioning surface, and a second recess contact surface. The recess positioning surface is located between the first recess contact surface and the second recess contact surface. The first protrusion contact surface can contact the first recess contact surface, the protrusion positioning surface can contact the recess positioning surface, and the second protrusion contact surface can contact the second recess contact surface.

4. The casing overmolding injection mold as described in claim 3, characterized in that: The raised positioning surface is a first inclined surface, and the recessed positioning surface is a second inclined surface.

5. The casing overmolding injection mold as described in claim 3, characterized in that: The height of the first protruding contact surface gradually decreases from near the protruding positioning surface to far away from the protruding positioning surface, and the depth of the first recessed contact surface gradually decreases from near the recessed positioning surface to far away from the recessed positioning surface.

6. The casing overmolding injection mold as described in claim 3, characterized in that: The height of the second raised contact surface gradually decreases from near the raised positioning surface to far away from the raised positioning surface, and the depth of the second recessed contact surface gradually decreases from near the recessed positioning surface to far away from the recessed positioning surface.

7. The casing overmolding injection mold as described in claim 3, characterized in that: The width of the first protruding contact surface gradually decreases from near the protruding positioning surface to away from the protruding positioning surface, and the width of the first recessed contact surface gradually decreases from near the recessed positioning surface to away from the recessed positioning surface.

8. The casing overmolding injection mold as described in claim 3, characterized in that: The width of the second protruding contact surface gradually decreases from near the protruding positioning surface to away from the protruding positioning surface, and the width of the second recessed contact surface gradually decreases from near the recessed positioning surface to away from the recessed positioning surface.

9. The casing overmolding injection mold as described in claim 1, characterized in that: The first forming part is a forming recess, and the second forming part is a forming protrusion, wherein the forming protrusion can be inserted into the forming recess.

10. The casing overmolding injection mold as described in claim 1, characterized in that: The first mold core is also provided with a positioning recess, and the second mold core is also provided with a positioning protrusion, the positioning protrusion being able to be inserted into the positioning recess.

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