Structure for improving side implantation of nut in two-color product mold

Abstract

This utility model relates to the field of two-color injection molding. It discloses an improved structure for side-mounted nuts in two-color product molds, comprising an injection molded product and a two-color mold for molding the product. The injection molded product includes a first injection position, a nut, and a second injection position. The first injection position has a recessed insertion groove, and the second injection position covers the insertion groove. The two-color mold includes a first-shot moving mold and a second-shot moving mold. The first-shot moving mold includes a first-shot core, a first-shot sliding seat, and a stud. The first-shot core has a molding groove on its side, and one end of the stud has a positioning structure. The insertion groove is sandwiched between the molding groove and the positioning structure. The second-shot moving mold includes a second-shot core and a second-shot sliding seat. This utility model simultaneously changes the nut embedding method and position. The first-shot sliding mechanism forms a hole on the first injection position to accommodate one end of the nut. The nut is clamped and fixed by the positioning platform on the first and second injection sliding positions, effectively solving the problem of the nut falling off.

Description

Technical Field

[0001] This utility model relates to the field of two-color injection molding, and in particular to a structure for improving the side insertion of nuts in two-color product molds. Background Technology

[0002] Currently, most consumer products, such as home appliances, communication devices, and mid-to-high-end toys, widely use engineering plastics for their housings. To install and secure internal components, copper nuts need to be directly embedded into the plastic housing. Typically, a pin is installed in the sliding mechanism to fix the nut, and the nut is automatically inserted into the mold by positioning the pin.

[0003] In such Figure 7 , Figure 8 When the nut 3 is embedded in the side of the two-color plastic shell, the thickness of both the first injection position 1 and the second injection position 2 of the plastic shell is relatively thin. When the nut 3 is inserted into the side of the two-color plastic shell, one end of the nut 3 is inserted into the first injection position 1, causing the head of the nut 3 to be located outside the first injection position 1 and penetrate to the outer surface of the second injection position 2. During the mold opening and the change of injection position of the two-color mold, vibration will occur, and the head of the nut 3 will shake, which may cause the nut 3 to fall into the mold. The nut 3 is easy to fall out, and the molding risk is high.

[0004] This utility model provides an improved structure for embedding nuts on the side of a two-color product mold, in order to solve the problem that nuts are prone to falling off when using a sliding mechanism to embed nuts on the side of a two-color product with a thin wall thickness. Utility Model Content

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a structure for improving the side-mounted nut insertion of a two-color product mold, comprising an injection molded product and a two-color mold for molding the injection molded product;

[0006] The injection molded product includes a first injection position, a nut, and a second injection position. The first injection position is recessed with an insertion groove for accommodating the nut, and the second injection position covers the insertion groove.

[0007] The two-color mold includes: a first injection mold for molding one injection position and a second injection mold for molding two injection positions;

[0008] A single injection mold includes a single injection core, a single injection slide seat disposed on one side of the single injection core, and an insert. The single injection slide seat is provided with a single injection molding area for molding the single injection part. The insert penetrates through the single injection molding area. A molding groove is opened on the side of the single injection core. A positioning structure is provided at one end of the insert. The insertion groove is sandwiched between the molding groove and the positioning structure.

[0009] The two-shot moving mold includes a two-shot core for fixing the first-shot part and a two-shot sliding seat. The two-shot sliding seat is provided with a two-shot molding area for molding the two-shot part. The two-shot molding area is provided with a positioning platform. One end of the nut is set inside the insertion groove, and the other end of the nut passes through the two-shot part and abuts against the positioning platform.

[0010] Preferably, the positions of the inserts correspond one-to-one with the positions of the positioning platforms.

[0011] Preferably, the nut has an annular groove in the middle, and the annular groove is located between the first injection position and the second injection position.

[0012] Preferably, the injection mold further includes an insert that penetrates an injection position seat. The insert includes a body and a molding head, both of which are cuboid in shape. The cross-section of the body is larger than that of the molding head. The injection position is provided with an elongated groove through which the molding head passes.

[0013] Preferably, the two-shot molding area is provided with a positioning body, which is a cuboid and is fitted inside the elongated groove.

[0014] Preferably, the cross-section of the positioning body is less than or equal to the cross-section of the forming head.

[0015] Preferably, the depth h of the implantation groove and the height m of the nut satisfy the following relationship: h = a * m, where a is a constant value, a ∈ [0.6, 0.8]; the depth h of the implantation groove and the width b of the annular groove satisfy the following relationship: h ≥ b.

[0016] Preferably, the positioning structure is a metal cylinder with a regular hexagonal cross-section.

[0017] Preferably, the positioning structure includes an annular body and a cylinder coaxially disposed at one end of the insert post. The cylinder is fitted inside the nut, and the annular body is arranged around the cylinder. The annular body is composed of a positioning ring and a connecting ring. The positioning ring, the connecting ring and the insert post are connected in sequence. The positioning ring is fitted inside the annular groove, and the end of the nut away from the injection position is fitted inside the connecting ring.

[0018] Preferably, the positioning ring, connecting ring, and insert are integrally formed and connected in sequence. When the nut is fitted onto the cylinder, the positioning ring can be engaged inside the annular groove of the nut, preventing the nut from detaching from the positioning structure during mold opening. The nut fitted onto the positioning structure will form an insertion groove at an injection point. The insertion groove is formed by the nut as an insert, ensuring a full fit between the insertion groove and the nut, reducing gaps and tolerances.

[0019] The beneficial effects of this utility model are as follows: This utility model simultaneously changes the nut embedding method and position. A hole for accommodating one end of the nut is formed on the first injection molding position by the injection molding mechanism. The nut is clamped and fixed by the positioning platform on the second injection molding position, while the second injection molding position covers and wraps the other end of the nut, effectively solving the problem of the nut falling off. It also improves the accuracy of nut insertion, increasing product yield and efficiency. Attached Figure Description

[0020] The accompanying drawings further illustrate the present invention, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0021] Figure 1 This is a schematic diagram of the structure of a shooting mold provided in an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of a two-shot mold provided in one embodiment of the present invention;

[0023] Figure 3 for Figure 1 A magnified view of a portion of region A in the middle;

[0024] Figure 4 for Figure 2 A magnified view of a portion of region B in the middle;

[0025] Figure 5 A partial cross-sectional view of an injection-molded product provided in an embodiment of this utility model;

[0026] Figure 6 A partial cross-sectional view of a shooting mold provided in an embodiment of the present utility model;

[0027] Figure 7 This is a schematic diagram of the structure of an injection-molded product provided in an embodiment of the present invention;

[0028] Figure 8 An exploded view of an injection-molded product provided in an embodiment of this utility model;

[0029] Markings in the diagram: 1: First injection position; 2: Second injection position; 3: Nut; 4: First injection slide seat; 5: Insert; 6: Insert; 61: Molding head; 7: First injection core; 8: Second injection slide seat; 9: Positioning platform; 10: Second injection core. Detailed Implementation

[0030] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0031] It should be noted that, in this utility model, unless otherwise stated, when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or may have an intervening element present simultaneously. "Inner" and "outer" refer to the inner and outer contours of a specific part. "Far" and "near" refer to the distance from or near to a certain component.

[0032] like Figures 1-4 As shown in the figure, an embodiment of the present invention provides an improved structure for inserting a nut 3 on the side of a two-color product mold, including an injection molded product and a two-color mold for molding the injection molded product;

[0033] The injection molded product includes a first injection position 1, a nut 3 and a second injection position 2. The first injection position 1 is recessed with an insertion groove for accommodating the nut 3, and the second injection position 2 covers the insertion groove.

[0034] The two-color mold includes: a primary injection mold for molding a primary injection position 1, and a secondary injection mold for molding a secondary injection position 2;

[0035] A single injection mold includes a single injection core 7, a single injection slide seat 4 disposed on one side of the single injection core 7, and an insert 5. The single injection slide seat 4 is provided with a single injection molding area for molding a single injection position 1. The insert 5 penetrates the single injection molding area. A molding groove is opened on the side of the single injection core 7. A positioning structure is provided at one end of the insert 5. The insertion groove is sandwiched between the molding groove and the positioning structure.

[0036] The two-shot moving mold includes a two-shot core 10 for fixing the first-shot injection position 1 and a two-shot sliding seat 8. The two-shot sliding seat 8 is provided with a two-shot molding area for molding the two-shot injection position 2. The two-shot molding area is provided with a positioning platform 9. One end of the nut 3 is disposed inside the insertion groove, and the other end of the nut 3 penetrates the two-shot injection position 2 and abuts against the positioning platform 9. The positioning platform 9 penetrates the two-shot injection position 2.

[0037] The positions of the inserts 5 and the positions of the positioning platforms 9 are set in a one-to-one correspondence.

[0038] The nut 3 has an annular groove in its middle, which is located between the first injection position 1 and the second injection position 2. By providing an annular groove in the middle of the nut, the molten material injected during the second injection can flow into the annular groove, fixing the nut at the second injection position and the first injection position.

[0039] The injection mold also includes an insert 6 that penetrates an injection seat 4. The insert 6 includes a main body and a molding head 61, both of which are cuboid in shape. The cross-section of the main body is larger than the cross-section of the molding head 61. An injection position 1 has an elongated groove through which the molding head 61 passes. The insert 6 forms a pre-defined groove on the injection position.

[0040] The two-shot molding area is equipped with a positioning body, which is a cuboid and is fitted inside the elongated groove. The positioning body further shapes a groove on the two-shot molding area, based on the groove formed on the first-shot molding area.

[0041] The cross-section of the positioning body is less than or equal to the cross-section of the forming head 61.

[0042] like Figure 5 As shown, the depth h of the implantation groove and the height m of the nut 3 satisfy the following relationship: h = a * m, where a is a constant, a ∈ [0.6, 0.8]; the depth h of the implantation groove and the width b of the annular groove satisfy the following relationship: h ≥ b. Further, a = 0.7, h = b.

[0043] The positioning structure is a metal cylinder with a regular hexagonal cross-section. The outline of the positioning structure is the same as that of the end of the nut 3 near the injection position 1, and the positioning structure is integrally formed and connected with the insert 5.

[0044] like Figure 6 As shown, the positioning structure includes an annular body and a cylinder coaxially disposed at one end of the insert 5. The cylinder is fitted inside the nut 3, and the annular body surrounds the cylinder. The annular body consists of a positioning ring and a connecting ring, which are sequentially connected to the insert 5. The positioning ring is fitted inside an annular groove, and the end of the nut 3 away from the injection position 1 is fitted inside the connecting ring. The positioning ring is used to fix the nut, securing it to one end of the insert 5, thereby forming an implantation groove at the injection position through the nut.

[0045] The positioning ring, connecting ring, and insert 5 are integrally formed and connected in sequence. When the nut 3 is fitted onto the cylinder, the positioning ring can be engaged in the annular groove of the nut 3, preventing the nut 3 from detaching from the positioning structure during mold opening. The nut 3 fitted onto the positioning structure will form an insertion groove on an injection position 1. The insertion groove is formed by the nut 3 as an insert 6, ensuring a full fit between the insertion groove and the nut 3, reducing gaps and tolerances. Furthermore, the nut 3 can be disassembled.

[0046] The working principle of this utility model is as follows: The insert 5 forms a hole in the first injection position 1. After the first injection molding is completed, the mold is opened and rotated 180° to the second injection position. One end of the nut 3 is fitted into the insertion groove on the first injection position 1. The mold is closed for the second injection molding. The second injection position 2 covers and wraps the nut 3 and the side of the first injection position 1, completing the product injection molding. To prevent the nut 3 from falling off due to vibration during the rotation of the two-color mold, the second injection position 2 covers the nut 3 to prevent it from peeling off from the product.

[0047] The technical features of the embodiments described above can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these should all be considered to be within the scope of this specification.

Claims

1. A structure for improving the side-mounted nut insertion in a two-color product mold, characterized in that: This includes injection molded products and two-color molds used to mold injection molded products; The injection molded product includes a first injection position, a nut, and a second injection position. The first injection position is recessed with an insertion groove for accommodating the nut, and the second injection position covers the insertion groove. The two-color mold includes: a first injection mold for molding one injection position and a second injection mold for molding two injection positions; A single injection mold includes a single injection core, a single injection slide seat disposed on one side of the single injection core, and an insert. The single injection slide seat is provided with a single injection molding area for molding the single injection part. The insert penetrates through the single injection molding area. A molding groove is opened on the side of the single injection core. A positioning structure is provided at one end of the insert. The insertion groove is sandwiched between the molding groove and the positioning structure. The two-shot moving mold includes a two-shot core for fixing the first-shot part and a two-shot sliding seat. The two-shot sliding seat is provided with a two-shot molding area for molding the two-shot part. The two-shot molding area is provided with a positioning platform. One end of the nut is set inside the insertion groove, and the other end of the nut passes through the two-shot part and abuts against the positioning platform.

2. The structure for improving the side-mounted nut insertion in a two-color product mold according to claim 1, characterized in that: The positions of the inserts are set to correspond one-to-one with the positions of the positioning platforms.

3. The structure for improving the side-mounted nut insertion in a two-color product mold according to claim 1, characterized in that: The nut has an annular groove in the middle, which is located between the first injection point and the second injection point.

4. The structure for improving the side-mounted nut insertion in a two-color product mold according to claim 1, characterized in that: The injection mold also includes an insert that penetrates an injection position. The insert includes a main body and a molding head. Both the main body and the molding head are cuboid in shape. The cross-section of the main body is larger than the cross-section of the molding head. The injection position has an elongated groove through which the molding head passes.

5. The structure for improving the side-mounted nut insertion in a two-color product mold according to claim 4, characterized in that: The two-shot forming area is provided with a positioning body, which is a cuboid and is fitted inside the elongated groove.

6. The structure for improving the side-mounted nut insertion in a two-color product mold according to claim 5, characterized in that: The cross-section of the positioning body is less than or equal to the cross-section of the forming head.

7. The structure for improving the side-mounted nut insertion in a two-color product mold according to claim 3, characterized in that: The depth h of the implantation groove and the height m of the nut satisfy the following relationship: h = a * m, where a is a constant value, a ∈ [0.6, 0.8]; the depth h of the implantation groove and the width b of the annular groove satisfy the following relationship: h ≥ b.

8. The structure for improving the side-mounted nut insertion in a two-color product mold according to claim 3, characterized in that: The positioning structure is a metal cylinder with a regular hexagonal cross-section.

9. The structure for improving the side-mounted nut insertion in a two-color product mold according to claim 3, characterized in that: The positioning structure includes an annular body and a cylinder coaxially disposed at one end of the insert. The cylinder is fitted inside the nut. The annular body is arranged around the cylinder. The annular body is composed of a positioning ring and a connecting ring. The positioning ring, the connecting ring and the insert are connected in sequence. The positioning ring is fitted inside the annular groove. The end of the nut away from the injection position is fitted inside the connecting ring.

10. The structure for improving the side-mounted nut insertion in a two-color product mold according to claim 9, characterized in that: The positioning ring, connecting ring, and insert are integrally formed and connected in sequence.

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