Metal insert positioning mold structure for reducing expansion coefficient of injection product

Abstract

The utility model relates to the technical field of positioning mold structures, and discloses a metal insert positioning mold structure capable of reducing the expansion coefficient of an injection molding product, which comprises a fixed mold and a movable mold, an injection molding pipe is arranged at the top of the fixed mold, an ejection mechanism is slidably connected in the movable mold, and positioning components are symmetrically arranged on two sides in the movable mold. Clamping assemblies are symmetrically arranged in the fixed mold; the positioning assembly comprises a high-temperature-resistant resin layer and a mounting groove, a powerful magnet is mounted in the high-temperature-resistant resin layer, the high-temperature-resistant resin layer is located in the mounting groove, and a cover plate is mounted at the top of the mounting groove. According to the utility model, the strong magnets are symmetrically embedded in the movable mold cavity and are coated with the high-temperature-resistant resin layer, and the metal insert is adsorbed by utilizing magnetic force, so that the stability of the metal insert in the injection molding process is ensured. Symmetrical clamping grooves are designed in the fixed mold cavity, elastic clamping assemblies are integrated, flexible clamping is provided through silica gel columns, and the inserts are prevented from loosening or deforming.

Description

TECHNICAL FIELD

[0001] The utility model relates to positioning mould structure technical field especially relates to the metal insert positioning mould structure of reducing the expansion coefficient of injection moulding product. BACKGROUND

[0002] Metal insert positioning mould structure refers to fixing metal inserts in injection mould through specific positioning design to ensure that it does not displace or deform in the plastic cladding process. This structure can adopt mechanical positioning, thermal expansion compensation, insert anchoring and other ways to make metal inserts stable in the mould, while reducing the influence of temperature change on product size.

[0003] However, in the existing injection mould, although there is a certain insert fixing and demoulding structure, it often depends on mechanical limiting or manual operation, which will lead to insufficient stability and low efficiency in the production process. For example, the traditional insert fixing method usually uses mechanical clamps or threaded structures, which will increase the complexity of the mould in some cases, leading to inaccurate positioning or displacement in the injection molding process. Moreover, the use of mechanical structure also occupies the internal space of the mould, limiting the flexibility of design. Furthermore, many traditional demoulding structures still require manual participation, reducing the automation level and posing the risk of surface damage to products due to improper manual operation.

[0004] In view of the above problems, the metal insert positioning mould structure for reducing the expansion coefficient of injection moulding product is proposed to solve the above problems. SUMMARY

[0005] In order to make up for the above shortcomings, the metal insert positioning mould structure for reducing the expansion coefficient of injection moulding product is provided to solve the problems of poor stability, insufficient positioning accuracy and low demoulding efficiency in the positioning process of metal inserts in the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: the metal insert positioning mould structure for reducing the expansion coefficient of injection moulding product, including fixed mould and movable mould, the top of the fixed mould is provided with injection pipe, the inside of the movable mould is slidably connected with ejection mechanism, the inside of the movable mould is provided with positioning assembly on both sides, the inside of the fixed mould is provided with clamping assembly symmetrically;

[0007] The positioning assembly comprises a high-temperature-resistant resin layer and a mounting groove, the inside of the high-temperature-resistant resin layer is provided with a strong magnet, the high-temperature-resistant resin layer is located in the inside of the mounting groove, and the top of the mounting groove is provided with a cover plate.

[0008] As a further description of the above technical scheme:

[0009] The top of the movable mold is provided with a movable mold cavity, and two cover plates are arranged in the movable mold cavity.

[0010] As a further description of the above technical solution:

[0011] The bottom of the fixed mold is provided with a fixed mold cavity, a clamping groove is symmetrically arranged in the fixed mold cavity, a plastic flow channel penetrates the center of the fixed mold, and a ejection hole is symmetrically arranged on both sides of the plastic flow channel.

[0012] As a further description of the above technical solution:

[0013] The top of the movable mold cavity abuts against the inside of the fixed mold cavity, and the two are not completely attached.

[0014] As a further description of the above technical solution:

[0015] The clamping assembly comprises clamping plates, a plurality of silica gel columns are mounted on the opposite sides of the two clamping plates, and a plurality of micro springs are fixedly connected to the side of the clamping plate close to the inside of the fixed mold.

[0016] As a further description of the above technical solution:

[0017] The two clamping plates are symmetrically arranged in the clamping groove, and the other ends of the plurality of micro springs are fixedly connected to the inside of the fixed mold.

[0018] As a further description of the above technical solution:

[0019] The bottom of the movable mold is provided with a driving mechanism.

[0020] As a further description of the above technical solution:

[0021] The top of the injection pipe is connected with a plastic injection machine, and the bottom of the injection pipe is connected with the plastic flow channel.

[0022] The utility model has the advantages that:

[0023] 1、In the utility model, strong magnets are symmetrically embedded in the predetermined insert placement area of the movable mold cavity, metal inserts are adsorbed by magnetic force, so that the inserts remain stable during the injection molding process and displacement or rotation caused by plastic flow pressure or thermal expansion is avoided. The outside of the magnet is coated with a high-temperature-resistant resin layer to prevent the influence of high temperature on the magnetism and to enhance the durability.

[0024] 2. The utility model discloses a two clamping grooves are designed in the fixed cavity for accurate positioning metal inserts, and the elastic clamping assembly is integrated in the clamping groove. The clamping assembly is composed of spring and clamping plate, and is provided with silica gel column, can provide flexible clamping for the insert, prevents it from loosening or deforming due to injection pressure. At the same time, pneumatic ejector pin is arranged near the runner, and the finished product is automatically ejected after injection molding, avoids the difficulty of manual part taking, improves production efficiency and reduces product surface damage. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The utility model discloses a metal insert positioning mold structure for reducing the expansion coefficient of injection molding product's three -dimensional schematic diagram is provided for the utility model,

[0026] Figure 2 The structure schematic diagram of high temperature resistant resin layer of metal insert positioning mold structure for reducing the expansion coefficient of injection molding product is provided for the utility model,

[0027] Figure 3 The structure schematic diagram of clamping groove of metal insert positioning mold structure for reducing the expansion coefficient of injection molding product is provided for the utility model,

[0028] Figure 4 The structure schematic diagram of clamping plate of metal insert positioning mold structure for reducing the expansion coefficient of injection molding product is provided for the utility model,

[0029] Figure 5 The structure schematic diagram of pneumatic ejector pin of metal insert positioning mold structure for reducing the expansion coefficient of injection molding product is provided for the utility model.

[0030] LEGEND:

[0031] 1, fixed mold, 11, fixed cavity, 12, clamping groove, 13, plastic runner, 14, ejection hole, 2, movable mold, 21, movable cavity, 3, injection tube, 4, ejection mechanism, 5, positioning assembly, 51, cover plate, 52, high temperature resistant resin layer, 53, strong magnet, 54, mounting groove, 6, clamping assembly, 61, clamping plate, 62, micro spring, 63, silica gel column, 7, pneumatic ejector pin. DETAILED DESCRIPTION

[0032] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0033] REFERENCE Figure 1 - Figure 5The utility model provides an embodiment: the metal insert positioning mould structure of reducing the expansion coefficient of injection product, including fixed mode 1 and movable mode 2. The bottom of fixed mode 1 is provided with the shaping mould cavity 11, the inside symmetry of this shaping mould cavity 11 is provided with the clamping groove 12 for accurate positioning metal insert. The center of fixed mode 1 is provided with the plastic flow channel 13, and this flow channel plays the role of transmission plastic in the injection process, ensures that plastic can flow into the mould inside evenly. The both sides of plastic flow channel 13 are provided with the ejection hole 14 for automatic ejection through pneumatic ejector pin 7 after injection molding. The top of movable mode 2 is provided with the dynamic mould cavity 21, and the dynamic mould cavity 21 cooperates with the shaping mould cavity 11 of fixed mode 1, ensures the accurate positioning of shape when mould closes. The bottom of movable mode 2 is provided with drive mechanism, and movable mode 2 can be driven to open and close through the mechanism. The top of dynamic mould cavity 21 and the inside of shaping mould cavity 11 abut, but the two do not completely adhere, and this design effectively avoids the influence of excessive friction and thermal expansion. The top of fixed mode 1 is provided with injection tube 3, and the tube is connected with plastic injection machine, realizes the injection of plastic. The bottom of injection tube 3 is connected with plastic flow channel 13, ensures that plastic can enter the mould smoothly and fill each part. The both sides of movable mode 2 are provided with positioning assembly 5, for further improving the positioning accuracy of metal insert, avoids its displacement in the injection process. The inside symmetry of fixed mode 1 is provided with clamping assembly 6, and the assembly clamps metal insert through elasticity, ensures that the insert does not loosen or deform in the whole injection process, thereby improving the precision and stability of injection product.

[0034] With reference to Figure 1 - Figure 2 Positioning assembly 5 includes high temperature resistant resin layer 52 and installation groove 54. High temperature resistant resin layer 52 is internally provided with strong magnet 53, and strong magnet 53 can attract metal insert through magnetic force, ensures its stability in the injection process. High temperature resistant resin layer 52 is located inside installation groove 54, can effectively fix magnet in the specified position, and prevents the influence of high temperature environment on the performance of magnet. The top of installation groove 54 is provided with cover plate 51, and the cover plate 51 not only provides additional protection, but also can ensure the firmness of magnet and resin layer, prevents its displacement or damage under high temperature or injection pressure. Two cover plates 51 are provided in the inside of dynamic mould cavity 21, further improves the stability of mould inside and the reliability of magnetic adsorption structure.

[0035] With reference to Figure 4The clamping assembly 6 comprises clamping plates 61. Two clamping plates 61 are symmetrically arranged inside the clamping groove 12, so as to ensure that the metal insert can be accurately clamped and positioned. The opposite side between the two clamping plates 61 is provided with a plurality of silica gel columns 63, which can provide a flexible clamping force, so as to ensure that the metal insert will not be loosened or deformed under the injection pressure, and at the same time, the surface of the insert can be effectively prevented from being damaged. The clamping plate 61 is fixedly connected with a plurality of micro springs 62 on the side close to the inside of the fixed mold 1, and the micro springs 62 can provide appropriate elastic force for the clamping plate 61, so that the clamping force can be automatically adjusted according to the size of the insert, and the stability of clamping can be ensured.

[0036] Working principle: The clamping groove 12 is symmetrically arranged in the shaping cavity 11 at the bottom of the fixed mold 1, which is used for positioning the metal insert. The center of the fixed mold 1 is provided with a plastic flow channel 13, and the flow channel is symmetrically provided with an ejection hole 14 on both sides. The movable cavity 21 of the movable mold 2 at the top is matched with the shaping cavity 11, which ensures the accurate positioning of the shape of the mold during the injection molding process. The fixed mold 1 is provided with an injection pipe 3 at the top, which is connected with a plastic injection machine, and the plastic is injected into the plastic flow channel 13 and fills each part of the mold. The bottom of the movable mold 2 is provided with a driving mechanism for driving the movable mold 2 to open and close, and the abutment between the top of the movable cavity 21 and the inside of the shaping cavity 11 ensures that the mold is closed. The positioning assembly 5 comprises a high-temperature-resistant resin layer 52 and a mounting groove 54, wherein the strong magnet 53 is magnetically adsorbed to the metal insert. The clamping plate 61 in the clamping assembly 6 clamps the metal insert through the micro spring 62 and the silica gel column 63. The ejection mechanism 4 is slidingly connected inside the movable mold 2, and the finished product is ejected through the sliding action after injection molding. The metal insert is kept stable during the injection molding process through the cooperation of the positioning assembly 5 and the clamping assembly 6, and the automatic demolding is realized through the pneumatic ejector pin 7 through the ejection hole 14.

[0037] Finally, it should be pointed out that: the above-mentioned only for preferred embodiments of the present application, and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. Metal insert positioning mold structure for reducing the coefficient of expansion of injection molded products, comprising a fixed mold (1) and a movable mold (2), characterized in that: The top of the fixed mold (1) is provided with an injection tube (3), the inside of the movable mold (2) is slidably connected with an ejection mechanism (4), the inside of the movable mold (2) is provided with a positioning assembly (5) on both sides, and the inside of the fixed mold (1) is provided with a clamping assembly (6) symmetrically. The positioning assembly (5) comprises a high-temperature-resistant resin layer (52) and a mounting groove (54), the inside of the high-temperature-resistant resin layer (52) is provided with a strong magnet (53), the high-temperature-resistant resin layer (52) is located in the mounting groove (54), and the top of the mounting groove (54) is provided with a cover plate (51).

2. The metal insert positioning mold structure for reducing the coefficient of expansion of an injection molded product according to claim 1, characterized by: The top of the movable mold (2) is provided with a movable mold cavity (21), and the inside of the movable mold cavity (21) is provided with two cover plates (51).

3. The metal insert positioning mold structure for reducing the coefficient of expansion of an injection molded product according to claim 2, characterized by: The bottom of the fixed mold (1) is provided with a fixed mold cavity (11), the inside of the fixed mold cavity (11) is provided with a clamping groove (12) symmetrically, the center of the fixed mold (1) penetrates a plastic flow channel (13), and the two sides of the plastic flow channel (13) are provided with an ejection hole (14) symmetrically, and the inside of the ejection hole (14) is provided with a pneumatic ejector pin (7).

4. The metal insert positioning mold structure for reducing the coefficient of expansion of an injection molded product according to claim 3, characterized by: The top of the movable mold cavity (21) abuts against the inside of the fixed mold cavity (11), and the two are not completely attached.

5. The metal insert positioning mold structure for reducing the coefficient of expansion of an injection molded product according to claim 3, characterized by: The clamping assembly (6) comprises a clamping plate (61), a plurality of silica gel columns (63) are installed on the opposite side between the two clamping plates (61), and a plurality of micro springs (62) are fixedly connected to the side of the clamping plate (61) close to the inside of the fixed mold (1).

6. The metal insert positioning mold structure for reducing the coefficient of expansion of an injection molded product according to claim 5, characterized by: The two clamping plates (61) are symmetrically distributed in the inside of the clamping groove (12), and the other end of the plurality of micro springs (62) is fixedly connected to the inside of the fixed mold (1).

7. The metal insert positioning mold structure for reducing the coefficient of expansion of an injection molded product according to claim 1, characterized by: The bottom of the movable mold (2) is provided with a driving mechanism.

8. The metal insert positioning mold structure for reducing the coefficient of expansion of an injection molded product according to claim 3, characterized by: The top of the injection tube (3) is connected with a plastic injection machine, and the bottom of the injection tube (3) is connected with the plastic flow channel (13).

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