Injection mold

Abstract

An injection mold is used for injecting a metal insert into an injection product, the injection mold comprises an upper mold plate, a lower mold plate and a hot runner plate, the hot runner plate, the upper mold plate and the lower mold plate are sequentially arranged from top to bottom, the lower mold plate comprises a lower mold core, the injection mold further comprises two positioning insert pins and at least one interference insert pin, the positioning insert pins are arranged on the lower mold core, and the interference insert pins are arranged on the lower mold core. The positioning insert pins are matched with positioning holes in the metal insert, the metal insert is installed on the lower mold core through the positioning insert pins, a straight line passing through the two positioning insert pins is defined as a datum line, the interference insert pin is arranged on the lower mold core, and the metal insert is installed at a first position of the lower mold core. And the interference insert pin is arranged in a second position of the lower mold core, which is located at the mirror projection or the 180-degree rotation projection of the metal insert along the reference line, and the interference insert pin does not interfere with the metal insert at the first position.

Description

Technical Field

[0001] The utility model relates to the technical field of mold production, in particular to an injection mold. Background Art

[0002] At present, in injection molding products, due to the functional requirements of the products, they need to be completed by combining a variety of different materials. The insert needs to be placed in the mold before the injection mold is closed. After the mold is closed and injection molding is performed, the plastic part tightly covers the insert and is fixedly connected. There are strict requirements for the position of the insert in the mold, otherwise the position of the insert in the injection molded product will not meet the production requirements or even damage the mold. Therefore, the injection mold will be equipped with a pin or a positioning piece or a combination of the two to position the insert.

[0003] In addition, some injection molding products have strict requirements on the injection direction of the inserts. When workers place the inserts in the mold, it is easy to place the inserts in the wrong position, which not only causes damage to the mold, but also affects the product qualification rate and the efficiency of injection molding production.

[0004] Therefore, in view of the problem that the position of the insert in the current injection molded product is easily placed incorrectly, it is urgent to develop a new machine or new technology to solve the above problem. Utility Model Content

[0005] The utility model aims to provide an injection mold to solve the problem that the position of the insert in the current injection molded product is easily placed incorrectly.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An injection mold is used to inject a metal insert into an injection molded product. The injection mold includes an upper mold plate, a lower mold plate and a hot runner plate. The hot runner plate, the upper mold plate and the lower mold plate are arranged in sequence from top to bottom. The lower mold plate includes a lower mold core. The injection mold also includes two positioning pins and at least one interference pin. The positioning pin is arranged on the lower mold core. The positioning pin cooperates with the positioning hole on the metal insert and the metal insert is installed on the lower mold core through the positioning pin. The straight line passing through the two positioning pins is defined as a reference line. The interference pin is arranged on the lower mold core. The metal insert is installed at a first position of the lower mold core. The interference pin is arranged on the lower mold core in a second position where the metal insert is mirrored or rotated 180 degrees along the reference line and the interference pin does not interfere with the metal insert at the first position.

[0008] Further, the interference pin is located on one side of the reference line.

[0009] Furthermore, the injection mold includes at least two interference pins, and the at least two interference pins are distributed on both sides of the reference line.

[0010] Furthermore, the interference pin is movably arranged on the lower mold core, and the injection mold includes an open mold state and a closed mold state. When the injection mold is changed from the closed mold state to the open mold state, the interference pin is pushed upward; when the injection mold is changed from the open mold state to the closed mold state, the interference pin is retracted downward.

[0011] Furthermore, a molding groove for molding the injection molded product is concavely provided on the upper surface of the lower mold core, and the positioning pin and the interference pin are installed in the molding groove.

[0012] Furthermore, the end of the positioning pin and the end of the interference pin protrude upward from the upper surface of the lower mold core.

[0013] Furthermore, the end of the positioning pin and the end of the interference pin are flush with the upper surface of the lower mold core.

[0014] Furthermore, the positioning pins and the interference pins penetrate downwardly through the lower surface of the lower mold core.

[0015] Furthermore, the injection mold is provided with a fixing block below the positioning pin, the lower mold core is provided with a fixing hole corresponding to the fixing block, the fixing block is installed in the fixing hole, and the positioning pin is installed on the fixing block.

[0016] Furthermore, the fixing block is a magnetic part, which is used to adsorb the positioned metal insert on the lower mold core.

[0017] The utility model has the beneficial effects of an injection mold: not only the structure is simple, but also the mold is prevented from being damaged, thereby improving the qualified rate of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a cross-sectional view of an injection mold.

[0019] Figure 2 for Figure 1 An enlarged cross-sectional view of point A in the injection mold is shown.

[0020] Figure 3 for Figure 1 A top view of the lower mold core of the injection mold is shown.

[0021] Figure 4 for Figure 3 The enlarged schematic diagram of point B in the injection mold is shown. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] The terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "vertical", "horizontal", etc. in the specification and claims of the utility model indicate directions or position relationships based on the directions or position relationships shown in the drawings, and are only for the clarity of expressing the technical solutions and the convenience of description, and therefore cannot be understood as limitations on the present application.

[0024] See also Figure 1 , Figure 3 and Figure 4 , an injection mold, used for injecting a metal insert 100 into an injection molded product. The injection mold includes an upper mold plate 20, a lower mold plate 30, a hot runner plate 10, two positioning pins 40 and at least one interference pin 50. The hot runner plate 10, the upper mold plate 20, and the lower mold plate 30 are arranged in sequence from top to bottom, the hot runner plate 10 includes a hot runner 11, the upper mold plate 20 includes an upper mold core 21, and the lower mold plate 30 includes a lower mold core 31. The hot runner 11 penetrates downward to the lower surface of the upper mold core 21, and the hot runner 11, the upper mold core 21, and the lower mold core 31 together enclose an injection mold cavity.

[0025] The positioning pin 40 is arranged on the lower mold core 31, and the positioning pin 40 cooperates with the positioning hole 101 on the metal insert 100 and the metal insert 100 is installed on the lower mold core 31 through the positioning pin 40. The straight line passing through the two positioning pins 40 is defined as the reference line 200. The interference pin 50 is arranged on the lower mold core 31, and the metal insert 100 is installed at the first position 300 of the lower mold core 31. The interference pin 50 is arranged on the lower mold core 31 and is located in the second position 400 of the metal insert 100 along the reference line 200, which is a mirror projection or a rotation of 180 degrees, and the interference pin 50 does not interfere with the metal insert 100 at the first position 300.

[0026] The second position 400 is an incorrect placement position of the metal insert 100. When the worker places the metal insert 100 into the second position 400, although the positioning hole 101 of the metal insert 100 can be fitted onto the positioning pin 40, the interference pin 50 will push against the metal insert 100 so that the metal insert 100 cannot be placed flat on the lower mold core 31, thereby preventing the worker from placing the metal insert 100 in a wrong position.

[0027] From the above, the injection mold proposed in the utility model realizes the function of injection molding through the cooperation of the hot runner plate 10, the upper template 20, and the lower template 30, realizes the positioning of the metal insert 100 through the positioning pin 40, and prevents the metal insert 100 from being placed incorrectly through the interference pin 50 so that the product can be produced smoothly. It not only has a simple structure, but also prevents damage to the mold and improves the qualified rate of the product.

[0028] See also Figure 1 and Figure 3 The interference pin 50 may be multiple. In this embodiment, the injection mold includes one interference pin 50, and the interference pin 50 is located on one side of the reference line 200. In another embodiment, the injection mold includes at least two interference pins 50, and the interference pins 50 are distributed on both sides of the reference line 200, which can also prevent the metal insert 100 from being placed incorrectly.

[0029] In this embodiment, the interference pin 50 is fixed on the lower mold core 31, and the interference pin 50 protrudes upward.

[0030] In another embodiment, the interference pin 50 is movably arranged on the lower mold core 31, and the injection mold includes an open mold state and a closed mold state. When the injection mold changes from the closed mold state to the open mold state, the interference pin 50 is pushed up; when the injection mold changes from the open mold state to the closed mold state, the interference pin 50 is retracted downward. This arrangement can prevent the interference pin 50 from colliding with the upper mold core 21, thereby reducing the damage rate of the interference pin 50 and thus reducing production costs.

[0031] See also Figure 1-Figure 3 The upper surface of the lower mold core 31 is concavely provided with a molding groove 311 for molding the injection molded product, and the molding groove 311 is located in the injection mold cavity. The positioning pin 40 and the interference pin 50 are installed in the molding groove 311.

[0032] In this embodiment, the end of the positioning pin 40 and the end of the interference pin 50 are flush with the upper surface of the lower mold core 31 .

[0033] In another embodiment, the ends of the positioning pin 40 and the ends of the interference pin 50 protrude upward from the upper surface of the lower mold core 31 .

[0034] See also Figure 1 and Figure 3In this embodiment, the positioning pin 40 and the interference pin 50 are fixed on the lower mold core 31 , and the positioning pin 40 and the interference pin 50 penetrate downwardly through the lower surface of the lower mold core 31 .

[0035] In another embodiment, the injection mold is provided with a fixing block below the positioning pin 40, the lower mold core 31 is provided with a fixing hole corresponding to the fixing block, the fixing block is installed in the fixing hole, and the positioning pin 40 is installed on the fixing block through a fastener. More specifically, the fixing block is a magnetic part, which is used to adsorb the positioned metal insert 100 on the lower mold core 31.

[0036] The utility model has the beneficial effects of an injection mold: not only the structure is simple, but also the mold is prevented from being damaged, thereby improving the qualified rate of the product.

[0037] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An injection mold for injecting a metal insert into an injection molded product, the injection mold comprising an upper mold plate, a lower mold plate and a hot runner plate, the hot runner plate, the upper mold plate and the lower mold plate are arranged in sequence from top to bottom, characterized in that: The lower template includes a lower mold core, and the injection mold also includes two positioning pins and at least one interference pin. The positioning pin is arranged on the lower mold core, and the positioning pin cooperates with the positioning hole on the metal insert and the metal insert is installed on the lower mold core through the positioning pin. The straight line passing through the two positioning pins is defined as the reference line. The interference pin is arranged on the lower mold core, and the metal insert is installed at a first position of the lower mold core. The interference pin is arranged on the lower mold core in a second position of the metal insert which is a mirror projection or a rotation of 180 degrees along the reference line, and the interference pin does not interfere with the metal insert at the first position.

2. An injection mold according to claim 1, characterized in that: The interference pin is located on one side of the reference line.

3. An injection mold according to claim 1, characterized in that: The injection mold includes at least two interference pins, and at least two interference pins are distributed on both sides of the reference line.

4. An injection mold according to claim 1, characterized in that: The interference pin is movably arranged on the lower mold core, and the injection mold includes an open mold state and a closed mold state. When the injection mold is changed from the closed mold state to the open mold state, the interference pin is pushed upward; when the injection mold is changed from the open mold state to the closed mold state, the interference pin is retracted downward.

5. An injection mold according to claim 1, characterized in that: The upper surface of the lower mold core is concavely provided with a molding groove for molding the injection molded product, and the positioning pin and the interference pin are installed in the molding groove.

6. An injection mold according to claim 5, characterized in that: The end of the positioning pin and the end of the interference pin protrude upward from the upper surface of the lower mold core.

7. An injection mold according to claim 5, characterized in that: The end of the positioning pin and the end of the interference pin are flush with the upper surface of the lower mold core.

8. An injection mold according to claim 1, characterized in that: The positioning pin and the interference pin penetrate downwardly through the lower surface of the lower mold core.

9. An injection mold according to claim 1, characterized in that: The injection mold is provided with a fixing block below the positioning pin, the lower mold core is provided with a fixing hole corresponding to the fixing block, the fixing block is installed in the fixing hole, and the positioning pin is installed on the fixing block.

10. An injection mold according to claim 9, characterized in that: The fixing block is a magnetic part, which is used to adsorb the positioned metal insert onto the lower die core.

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