A mold for injection molding

Abstract

The utility model provides a mold for injection molding, including a male mold component and a female mold component that are relatively arranged, the female mold component including a female mold plate, a female mold core and a female mold insert, the female mold core is fixedly installed on the female mold plate; the female mold insert can movably penetrate the female mold plate and the female mold core, thereby forming a cavity for molding plastic products together with the female mold core and the male mold component. The mold for injection molding of the utility model has a simple structure, and the movably arranged female mold insert can move before the male mold component to achieve the purpose of core pulling, which is more suitable for the production of plastic products with high hole forming height, so that there is no risk of mold sticking during the molding and production process of plastic products.

Description

Technical Field

[0001] The utility model belongs to the technical field of mold manufacturing, in particular to a mold for injection molding. Background Art

[0002] Injection molds are tools for producing plastic products, and they are also tools that give plastic products a complete structure and precise dimensions. Injection molding is a processing method used in mass production of certain parts with complex shapes. Specifically, it means that the heated and melted plastic is injected into the mold cavity by the injection molding machine under high pressure, and after cooling and solidification, a molded product is obtained. However, for some molded products, the height of the holes to be formed is high, which can easily lead to the phenomenon of products sticking to the mother mold during production (if the product sticks to the side of the mother mold, the product cannot be taken out), and the appearance of the product is not complete and stable enough. Utility Model Content

[0003] In view of the above-mentioned problems existing in the existing mold manufacturing technology, the main purpose of the utility model is to provide a mold for injection molding. The provided mold for injection molding has a simple structure, and the movable female mold insert can move before the male mold component to achieve the purpose of core pulling. It is more suitable for the production of plastic products with high hole height, so that there is no risk of mold sticking during the molding and production process of plastic products.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] The utility model provides a mold for injection molding, which comprises a male mold component and a female mold component which are arranged relatively, wherein the female mold component comprises a female mold plate, a female mold core and a female mold insert, wherein the female mold core is fixedly mounted on the female mold plate; the female mold insert can movably penetrate the female mold plate and the female mold core, thereby forming a cavity for molding a plastic product together with the female mold core and the male mold component.

[0006] As a further description of the above technical solution, the female mold assembly also includes a front plate, which is arranged on the side of the female mold plate away from the male mold assembly, and the front plate can be relatively close to / far away from the female mold plate; the end of the female mold insert away from the cavity is connected to the front plate.

[0007] As a further description of the above technical solution, a middle plate is detachably connected to a side of the front plate facing the mother mold plate, and an end of the mother mold insert facing away from the cavity is connected to the middle plate.

[0008] As a further description of the above technical solution, one end of the female mold insert facing away from the cavity is connected to the middle plate through an opener.

[0009] As a further description of the above technical solution, along the direction in which the front plate can be relatively close to / away from the mother template, the mother template is further provided with a through hole;

[0010] A limit pull rod is movably inserted into the through hole, and one end of the limit pull rod faces the front plate and passes through the mother template and is fastened to the middle plate; one end of the limit pull rod faces away from the front plate is connected to a limit block, and the part of the end surface of the limit block facing the front plate can be abutted against the end surface of the mother template facing away from the front plate.

[0011] As a further description of the above technical solution, the limiting pull rod is slidably connected to the through hole.

[0012] As a further description of the above technical solution, the limit block and the limit pull rod are of an integrated / split design.

[0013] The outstanding effects of the utility model are:

[0014] In the injection mold provided by the utility model, the male mold component and the female mold component are arranged relatively, and the female mold insert in the female mold component can movably penetrate the female mold plate and the female mold core. Therefore, when opening the mold, the female mold insert can be controlled to withdraw from the hole of the plastic product first, and then the male mold component is relatively far away from the female mold component, so as to take out the molded plastic product. In the process of the female mold insert withdrawing from the hole of the plastic product, since the male mold component and the female mold core have a stable clamping effect on the inner and outer sides of the plastic product, the hole of the plastic product will not be damaged, so that after the male mold component is relatively far away from the female mold component, the integrity of the final molding of the plastic product can be guaranteed. Therefore, the female mold insert is movably arranged so that it can move before the male mold component during the mold opening process to achieve the purpose of core pulling, which is more suitable for the production of plastic products with high hole heights, so that there is no risk of mold sticking during the molding and production process of plastic products, the product appearance is complete and stable, and the cost of mold repair in production is also reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of a plastic product with a hole;

[0016] Figure 2 It is a partial cross-sectional view of the first working state of the injection mold (excluding the male mold component) in the utility model;

[0017] Figure 3 A partial cross-sectional view of the second working state of the injection mold (excluding the male mold component) in the utility model. Explanation of the accompanying reference numerals:

[0018] 1. Mother template; 11. Through hole; 12. First upper end surface; 13. Second upper end surface; 2. Mother mold core; 3. Mother mold insert; 4. Plastic product; 41. Hole; 5. Front plate; 6. Middle plate; 7. Opener and closer; 8. Limit rod; 9. Limit block. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present utility model, it should be noted that the terms "upper", "middle", "lower", "inner", "outer", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. The terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following describes the implementation method of the present utility model based on its overall structure.

[0021] See also Figures 1 to 3 An embodiment of the utility model discloses a mold for injection molding, which includes a male mold component (not shown in the figure) and a female mold component that are relatively arranged, and the female mold component includes a female mold plate 1, a female mold core 2 and a female mold insert 3, and the female mold core 2 is fixedly installed on the female mold plate 1; the female mold insert 3 can movably penetrate the female mold plate 1 and the female mold core 2, thereby forming a cavity for molding a plastic product 4 together with the female mold core 2 and the male mold component.

[0022] By means of the above structure, when molding an injection molded product, the heated and melted plastic is still injected into the cavity for molding the plastic product 4 formed by the female mold insert 3, the female mold core 2 and the male mold assembly, and then the mold is opened after cooling and solidification, wherein the female mold core 2 is used to mold the outer surface of the plastic product 4, the male mold assembly is used to mold the inner surface of the plastic product 4, and the female mold insert 3 is used to mold the hole 41 of the plastic product 4. Different from conventional injection molds, the female mold insert 3 is not fixedly connected to the female mold plate 1 and the female mold core 2, but can movably penetrate the female mold plate 1 and the female mold core 2. Therefore, when opening the mold, the female mold insert 3 can be controlled to withdraw from the hole 41 of the plastic product 4 first, and then the male mold assembly can be relatively away from the female mold assembly, so as to take out the molded plastic product 4. During the process of the female mold insert 3 withdrawing from the hole 41 of the plastic product 4, the hole 41 of the plastic product 4 will not be damaged because the male mold assembly and the female mold core 2 have a stable clamping effect on the inner and outer sides of the plastic product 4, so that after the male mold assembly is relatively far away from the female mold assembly, the integrity of the final molding of the plastic product 4 can be guaranteed. Therefore, the female mold insert 3 is movably arranged so that it can move before the male mold assembly during the mold opening process to achieve the purpose of core pulling, which is more suitable for the production of plastic products with high holes 41, so that there is no risk of mold sticking during the molding production of plastic products, the product appearance is complete and stable, and the cost of mold repair during production is reduced.

[0023] See also Figures 2 to 3 Specifically, in this embodiment, the male mold assembly (not shown in the figure) and the female mold assembly are arranged opposite to each other in the vertical direction, and the male mold assembly is located above the female mold assembly. The female mold core 2 is fixedly installed on the upper part of the female mold plate 1, and part of its upper end surface is recessed downward to form a female mold cavity as a part of the mold cavity. The female mold insert 3 is movably arranged in the vertical direction through the female mold plate 1 and the female mold core 2, and its part that passes through the female mold core 2 upward can form a mold cavity for molding the plastic product 4 together with the female mold core 2 and the male mold assembly. It should be understood that the initial height of the female mold insert 3 protruding upward from the female mold core 2 (that is, the height of the female mold insert 3 protruding upward from the female mold core 2 before the heated and melted plastic is injected into the mold cavity) is determined by the height of the hole 41 on the plastic product 4. When the mold is opened after cooling and solidification, the female mold insert 3 can be moved vertically downward by a preset distance first, and then the male mold assembly can be controlled to move upward away from the female mold insert 3 to remove the plastic product 4.

[0024] Specifically, in this embodiment, the female mold assembly further includes a front plate 5, which is disposed on the lower side of the female mold plate 1. The front plate 5 is driven by a driving component so that it can move upwards toward the female mold plate 1 or downwards away from the female mold plate 1, and the end of the female mold insert 3 that is away from the mold cavity is connected to the front plate 5, thereby driving the female mold insert 3 to move in the vertical direction relative to the female mold core 2. More specifically, a middle plate 6 is detachably connected to the upper side of the front plate 5, and the lower end of the female mold insert 3 is connected to the upper side of the front plate 5 through a middle plate 6. The middle plate 6 is detachably connected to the front plate 5, which is convenient for assembly and maintenance of the mold.

[0025] See also Figure 3 Specifically, in this embodiment, the lower end of the female mold insert 3 is connected to the middle plate 6 through an opener 7 to facilitate the assembly of the female mold insert 3. The opener 7 can be, for example, a resin opener 7. Of course, in other embodiments, the lower end of the female mold insert 3 can also be connected to the middle plate 6 in other connection methods. When opening the mold, the front plate 5 moves downward, and synchronously drives the middle plate 6 to move downward, thereby driving the female mold insert 3 to move downward through the opener 7, so that its upper end exits the hole 41 of the plastic product 4, and then the male mold assembly can be moved upward away from the female mold assembly to remove the plastic product 4.

[0026] Please continue reading Figures 2 to 3 Specifically, in this embodiment, the mother template 1 is further provided with a through hole 11 in the vertical direction; a limit rod 8 is movably inserted in the through hole 11, and the lower end of the limit rod 8 passes downward through the mother template 1 and is tightly connected to the middle plate 6; the upper end of the limit rod 8 is connected to a limit block 9, and the downward end surface of the limit block 9 can abut against the upper end surface of the mother template 1 to ensure that the front plate 5 is vertically downward and away from the limit of the mother template 1. In order to make the overall assembly of the mold more compact. Preferably, the mother template 1 has a first upper end surface 12 and a second upper end surface 13, and the second upper end surface 13 is formed by the first upper end surface 12 being recessed downward, and is a table surface in the through hole 11, so that it can abut against the end surface facing the limit block 9.

[0027] Specifically, in this embodiment, the limiting pull rod 8 is slidably connected to the through hole 11. More specifically, the through hole 11 has an upper part and a lower part, the upper part is the part between the first upper end face 12 and the second upper end face 13 of the mother template 1, and the lower part is the part from the second upper end face 13 to its bottom surface, which is in the shape of a stepped hole as a whole. The limiting pull rod 8 is slidably matched with the lower hole wall of the through hole 11. It should be understood that in order to ensure the verticality of the limiting pull rod 8 during the movement of the through hole 11, the lower part of the through hole 11 has an appropriate length.

[0028] Specifically, in this embodiment, the limit block 9 and the upper end of the limit rod 8 are of an integrated design. Of course, in other embodiments, the limit block 9 and the upper end of the limit rod 8 are of a split design. Since the mother mold assembly has a certain thickness, and the front plate 5 and the middle plate 6 will move downward synchronously away from the mother mold plate 1, the movement distance and the thickness of the mold assembly are superimposed, so that the overall length of the limit rod 8 is longer, so the limit rod 8 can also be of a split design to reduce the mold cost.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not limited to the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any changes, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mold for injection molding, characterized in that: It includes a male mold component and a female mold component that are relatively arranged. The female mold component includes a female mold plate, a female mold core and a female mold insert. The female mold core is fixedly installed on the female mold plate; the female mold insert can movably penetrate the female mold plate and the female mold core, thereby forming a cavity for molding plastic products together with the female mold core and the male mold component.

2. The injection mold according to claim 1, characterized in that: The female mold assembly also includes a front plate, which is arranged on the side of the female mold plate away from the male mold assembly, and the front plate can be relatively close to / far away from the female mold plate; the end of the female mold insert away from the cavity is connected to the front plate.

3. The injection mold according to claim 2, characterized in that: A middle plate is detachably connected to a side of the front plate facing the mother mold plate, and an end of the mother mold insert facing away from the mold cavity is connected to the middle plate.

4. The injection mold according to claim 3, characterized in that: The end of the female mold insert facing away from the mold cavity is connected to the middle plate through an opener and a shutter.

5. The injection mold according to claim 4, characterized in that: The mother template is also provided with a through hole along the direction in which the front plate can be relatively close to / away from the mother template; A limit pull rod is movably inserted into the through hole, and one end of the limit pull rod faces the front plate and passes through the mother template and is fastened to the middle plate; one end of the limit pull rod faces away from the front plate is connected to a limit block, and the part of the end surface of the limit block facing the front plate can be abutted against the end surface of the mother template facing away from the front plate.

6. The injection mold according to claim 5, characterized in that: The limiting pull rod is slidably connected to the through hole.

7. The injection mold according to claim 5, characterized in that: The limiting block and the limiting pull rod are of an integrated or split design.

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