Injection mold for improving parting line

Abstract

The utility model relates to an injection mold for improving a parting line, which comprises a front mold, a rear mold, a sliding block and an insert, the insert is positioned between the front mold and the rear mold and is respectively matched with the front mold and the rear mold, and the insert is respectively provided with a first positioning hole and a second positioning hole, the first positioning hole is used for positioning and locking the front mold, and the second positioning hole is used for positioning and locking the rear mold. According to the injection mold, the step difference at the parting line can be reduced, the parting line is eliminated or improved, and the appearance commodity of a product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold with improved parting lines. Background Art

[0002] Plastic trims used in automobiles and motorcycles have parting lines on their products due to production process limitations. The parting line is the joining line between the front mold and the rear mold. When the front mold and the rear mold are matched, there will inevitably be a step difference in the traditional mold structure, such as Figure 1 and Figure 2 As shown, Figure 1 It shows the reverse step difference. Figure 2 The display shows a positive step difference. If there is a significant step difference at the parting line that is easily visible, it will seriously affect the product's appearance and commodity quality. Therefore, if the step difference at the parting line can be reduced, the parting line can be improved, thereby improving the appearance and commodity quality of the plastic trim. Utility Model Content

[0003] The utility model aims to design an injection mold for improving a parting line, so as to reduce the step difference at the parting line, thereby improving the parting line and improving the commodity appearance of the product.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] An injection mold with improved parting line includes a front mold, a rear mold and a slider, and also includes an insert, wherein the insert is located between the front mold and the rear mold and cooperates with the front mold and the rear mold respectively, and the insert is respectively provided with a first positioning hole for positioning and locking with the front mold and a second positioning hole for positioning and locking with the rear mold.

[0006] Furthermore, in the above-mentioned injection mold with improved parting line, the insert is positioned and locked with the front mold and the rear mold by screws.

[0007] Furthermore, in the above-mentioned injection mold with improved parting line, the first positioning hole and the second positioning hole are located on the same straight line and are connected.

[0008] Furthermore, in the above-mentioned injection mold with improved parting line, a convex section is provided at the connection point between the first positioning hole and the second positioning hole.

[0009] Furthermore, in the above-mentioned injection mold with improved parting line, the junction between the front mold and the insert facing the product is located on the appearance surface of the product.

[0010] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides an injection mold for improving the parting line, in which the insert is first positioned and locked on the front mold, and the parting surface and parting line formed between the front mold and the insert are processed and polished, and then the insert is positioned and locked on the rear mold. When the front mold and the rear mold are closed, the insert will be matched with the front mold again. Because the insert was previously matched with the front mold alone and processed and polished, the step difference of the parting line formed by the insert and the front mold must be smaller than the step difference of the parting line formed by the rear mold and the front mold in the prior art. Therefore, the injection mold can reduce the step difference at the parting line, improve the parting line, and improve the product appearance and commerciality. The injection mold is easy to make, simple in structure, safe, durable and highly reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 A schematic diagram of a structure that produces an inverse step difference in a conventional mold structure;

[0013] Figure 2 A schematic diagram of a structure that produces a positive step difference in a conventional mold structure;

[0014] Figure 3 It is a schematic diagram of the structure of positioning the insert on the front mold of the utility model;

[0015] Figure 4 It is a schematic diagram of the structure of positioning the insert on the rear mold of the utility model;

[0016] Figure 5 It is a schematic diagram of the utility model applied to injection molding;

[0017] Figure 6 A schematic diagram of the improvement of the step difference of the product produced by the utility model;

[0018] The names of the components marked in the figure are as follows:

[0019] 1. Rear mold; 2. Front mold; 3. Slider; 4. Product; 5. Insert; 51. Protruding section; 52. First positioning hole; 53. Second positioning hole; 6. Screw. DETAILED DESCRIPTION

[0020] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0021] Example: Please refer to Figure 3-6 , an injection mold with improved parting line, includes a front mold 2, a rear mold 1, an insert 5 and a slider 3. In this embodiment, the front mold 2 is a fixed mold, and the rear mold 1 is a movable mold.

[0022] The insert 5 is located between the front mold 2 and the rear mold 1. The front mold 2 and the rear mold 1 are respectively provided with grooves that match the insert 5. The insert 5 is provided with a first positioning hole 52 for positioning and locking with the front mold 2; the insert 5 is provided with a second positioning hole 53 for positioning and locking with the rear mold 1. The insert 5 is driven into the front mold 2 through the first positioning hole 52 by the screw 6 to achieve the positioning and locking of the insert 5 and the front mold 2; the insert 5 is driven into the rear mold 1 through the second positioning hole 53 by the screw 6 to achieve the positioning and locking of the insert 5 and the rear mold 1. Preferably, in this embodiment, the first positioning hole 52 and the second positioning hole 53 are located on the same straight line and communicate with each other. A convex section 51 is provided at the communication point between the first positioning hole 52 and the second positioning hole 53, which can simplify the structure of the insert 5 without affecting the function. When the insert 5 and the front mold 2 are positioned and locked, for example, the front mold 2 is located at the bottom, the screw 6 passes through the convex section 51 from top to bottom, so that the thread of the screw 6 enters the front mold 2, and the head of the screw 6 is blocked by the convex section 51. Figure 3 When the insert 5 and the rear mold 1 are positioned and locked, the screw 6 passes through the convex section 51 from bottom to top, so that the thread of the screw 6 enters the rear mold 1, and the head of the screw 6 is blocked by the convex section 51, as shown in FIG. Figure 4 shown.

[0023] The joint between the front mold 2 and the insert 5 facing the product 4 is located on the appearance surface of the product 4, replacing the joint between the rear mold 1 and the front mold 2 facing the product 4 in the prior art, which is located on the appearance surface of the product 4; while the joint between the rear mold 1 and the insert 5 facing the product 4 is not located on the appearance surface of the product 4.

[0024] Working principle of this embodiment: This embodiment provides an injection mold for improving the parting line. First, the screw 6 is drilled from top to bottom through the convex section 51 and the first positioning hole 52 into the front mold 2, so that the insert 5 is positioned and locked on the front mold 2, and then the joint between the front mold 2 and the insert 5 facing the product 4, that is, the parting surface and the parting line, is polished to eliminate the step difference at the parting line. The joint between the front mold 2 and the insert 5 facing the product 4 is located on the appearance surface of the product 4, replacing the joint between the rear mold 1 and the front mold 2 facing the product 4 in the prior art. It is located on the appearance surface of the product 4. Therefore, by polishing Grinding the joint between the front mold 2 and the insert 5 facing the product 4 improves the parting line of the product 4 at a position that is easily observed by sight, thereby improving the commercial appearance of the product 4. Then loosen the screw 6, place the insert 5 on the groove where the rear mold 1 and the insert 5 cooperate, and drill the screw 6 into the rear mold 1 from bottom to top through the convex section 51 and the second positioning hole 53, so as to achieve the positioning and locking of the insert 5 on the rear mold 1, and then the movable mold rear mold 1 moves to close with the fixed mold front mold 2, and a cavity is formed between the front mold 2, the insert 5, the rear mold 1, and the slider 3, and molding is performed by injection molding into the cavity, such as Figure 5 shown.

[0025] During processing, the insert 5 is positioned and locked on the front mold 2 and processed together with the front mold 2. Since the parting surface formed between the front mold 2 and the insert 5 is a contact surface and an open space, it can be directly machined or manually polished to achieve zero step difference, that is, eliminate the step difference, such as Figure 6 As shown, in the prior art, there are only the front mold 2 and the rear mold 1, but no insert 5. When the front mold 2 and the rear mold 1 are closed, the parting line cannot be directly machined or manually polished. It can only be printed on a FIT mold machine with red lead to match the parting line of the front mold 2 and the rear mold 1. Multiple matches are required, and it is difficult to achieve a zero-order difference.

[0026] After the mating is completed, the insert 5 and the front mold 2 are unhard-connected, and then positioned and locked on the rear mold 1. When the front mold 2 and the rear mold 1 are closed, the insert 5 will be mated with the front mold 2 again. Because the insert 5 was previously mated with the front mold 2 alone and processed and polished, the step difference of the parting line formed by the insert 5 and the front mold 2 must be smaller than the step difference of the parting line formed by the rear mold 1 and the front mold 2 in the prior art. Therefore, the injection mold provided by the utility model reduces the step difference at the parting line, improves the parting line, and improves the appearance of the product 4. The injection mold is easy to make, simple in structure, safe, durable and reliable.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "upper", "lower", "left", "right", "front", "rear" and similar expressions used herein are for illustrative purposes only.

[0028] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An injection mold for improving a parting line, comprising a front mold (2), a rear mold (1) and a slider (3), characterized in that: The invention also comprises an insert (5), wherein the insert (5) is located between the front mold (2) and the rear mold (1) and cooperates with the front mold (2) and the rear mold (1) respectively, and the insert (5) is provided with a first positioning hole (52) for positioning and locking with the front mold (2) and a second positioning hole (53) for positioning and locking with the rear mold (1).

2. The injection mold with improved parting line according to claim 1, characterized in that: The insert (5) is positioned and locked with the front mold (2) and the rear mold (1) by means of screws (6).

3. The injection mold with improved parting line according to claim 1, characterized in that: The first positioning hole (52) and the second positioning hole (53) are located on the same straight line and are connected.

4. The injection mold with improved parting line according to claim 3, characterized in that: A convex section (51) is provided at the connection point between the first positioning hole (52) and the second positioning hole (53).

5. The injection mold with improved parting line according to claim 1, characterized in that: The junction between the front mold (2) and the insert (5) facing the product (4) is located on the appearance surface of the product (4).

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