CN221659967U - Three-plate injection mold - Google Patents

Abstract

The utility model relates to a three-plate injection mold in the field of mold technology, comprising: a mother mold plate, a male mold plate connected to the bottom of the mother mold plate, and a stripping plate located above the mother mold plate; a mother mold core and a male mold core are connected between the mother mold plate and the male mold plate, a molding cavity is arranged between the mother mold core and the male mold core, a material head groove is arranged on the mother mold core, and an injection channel connecting the material head groove and the molding cavity is arranged in the mother mold core; the mother mold plate is provided with a first groove connected to the material head groove, an insert adapted to the first groove is connected to the bottom of the stripping plate, an injection port is arranged at the bottom of the insert, the injection port is connected to the material head groove, a hot nozzle for injection extends from the stripping plate to the insert, and the injection material is injected into the injection port from the hot nozzle. The utility model reduces the amount of injection plastic by lowering the height of the injection plastic head without changing the function of the three-plate injection mold, saves energy and reduces consumption, and reduces production costs.

Description

A three-plate injection mold

Technical Field

The utility model relates to the technical field of molds, in particular to a three-plate injection mold.

Background Art

In daily production injection molding, three-plate injection molds, two-plate injection molds, and hot glue injection molds are usually used. These three mold structures are different and applicable to different scenarios. Among them, the three-plate injection mold usually has a mother mold plate, a stripping plate, and a mother mold core. The hot nozzle is in the stripping plate. The raw material enters the injection channel of the mother mold core through the injection channel in the mother mold plate, and then enters the molding cavity through the injection channel of the mother mold core. Three-plate molds are usually used to produce parts that require high precision and complex structures.

The existing three-plate injection mold is provided with an injection channel on the mother mold plate and the mother mold core, through which the raw material is guided into the molding cavity during the injection molding process. There are the following problems:

1. Due to the presence of injection molding channels on the mother mold plate and the mother mold core, the amount of injection molding head used is relatively large. For example, as shown in Figure 6, the injection molding head includes the mother mold plate and the mother mold core section, and is relatively high, which leads to an increase in production costs.

2. The raw materials must flow through these two channels, resulting in a relatively long injection molding cycle and limiting production efficiency.

The increase in the amount of injection molding heads directly leads to the waste of raw materials, which is a resource loss that cannot be ignored in modern injection molding production. The extension of the injection molding cycle also makes the production cycle longer, which restricts the improvement of production efficiency.

Utility Model Content

The utility model discloses a three-plate injection mold, which is used to solve relevant technical problems in the background technology.

The utility model provides a three-plate injection mold, comprising: a female template, a male template connected to the bottom of the female template, and a stripping plate located above the female template;

A female mold core and a male mold core are connected between the female mold core and the male mold core, a molding cavity is arranged between the female mold core and the male mold core, a sprue groove is arranged on the female mold core, and an injection channel connecting the sprue groove and the molding cavity is arranged in the female mold core; the female mold core is provided with a first groove connected with the sprue groove, an insert matched with the first groove is connected to the bottom of the stripping plate, an injection port is arranged at the bottom of the insert, the injection port is connected with the sprue groove, a hot injection nozzle for injection extends from the stripping plate to the insert, and the injection material is injected into the injection port from the hot injection nozzle.

In some embodiments, the insert is movably connected to the stripping plate.

In some embodiments, the insert is integrally formed with the stripper plate.

In some embodiments, the hot injection nozzle has a hot injection sleeve on the outside, and the outside of the hot injection sleeve and the insert are sealed.

In some embodiments, there are multiple injection channels, and the material head groove is a through-going branch-like structure.

In some embodiments, a second groove is formed inwardly at the bottom of the master mold plate, and the master mold core is embedded and connected in the second groove.

In some embodiments, a third groove is formed on the top of the male mold plate, and the male mold core is embedded and connected in the third groove.

Compared with the prior art, the beneficial effects of the utility model are:

(1) The three-plate injection mold of the utility model has a first groove formed on the mother mold plate, an insert is connected to the bottom of the stripping plate, and an injection port for discharging raw materials is provided at the bottom of the insert, so that the raw materials can be directly injected into the injection channel in the mother mold core. Without changing the function of the three-plate injection mold, the amount of injection molding head is reduced, energy is saved, consumption is reduced, and production costs are reduced.

(2) The three-plate injection mold of the utility model designs the sprue groove into a through branch-like structure, thereby reducing the volume of the sprue while ensuring the injection molding process, thereby further reducing the amount of injection sprues used and saving production costs.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of a three-plate injection mold of the utility model;

FIG2 is a cross-sectional view of a three-plate injection mold of the present invention;

FIG3 is a partial enlarged view of FIG2 of the present utility model;

FIG4 is a cross-sectional view of the female mold core of the present invention;

FIG5 is a schematic structural diagram of the material head and the product obtained by the three-plate injection mold of the utility model;

FIG. 6 is a schematic structural diagram of a material head and a product obtained by a three-plate injection mold in the prior art of the utility model.

The figure numbers are as follows: 1. female mold plate; 11. first groove; 12. second groove; 2. male mold plate; 21. third groove; 3. stripping plate; 4. female mold core; 41. material head groove; 42. injection channel; 5. male mold core; 6. molding cavity; 7. insert; 71. injection port; 8. hot injection nozzle; 81. hot injection sleeve.

DETAILED DESCRIPTION

The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

As shown in Fig. 1-4, the utility model provides a three-plate injection mold, including: a female mold plate 1, a male mold plate 2, a stripping plate 3, a female mold core 4, a male mold core 5, an insert 7 and a hot injection nozzle 8. The male mold plate 2 is connected to the female mold plate 1, and the stripping plate 3 is located on the female mold plate 1 and can be separated from the female mold plate 1. The female mold core 4 and the male mold core 5 are connected between the female mold plate 1 and the male mold plate 2, and a product molding cavity 6 is opened between the female mold core 4 and the male mold core 5. A through injection channel 42 is opened in the female mold core 4, and a material head groove 41 connected to the injection channel 42 is opened on the female mold core 4. A first groove 11 connected to the injection channel 42 is opened on the female mold plate 1. When the injection molding process is performed, the insert 7 is placed in the first groove 11, and the raw material is discharged from the injection port 71 into the material head groove 41, and then flows from the injection channel 42 to the molding cavity 6 for molding. The hot injection nozzle 8 for injection molding extends from the stripping plate 3 to the insert 7, and the injection molding material is injected into the injection port 71 from the hot injection nozzle 8. The outside of the hot injection nozzle 8 is embedded and connected in the stripping plate 3 and the insert 7 through the hot injection sleeve 81, and the injection molding material is injected into the injection port 71 from the discharge port of the hot injection nozzle 8, so as to achieve the technical effect that the raw material directly enters the injection channel 42 in the mother mold core 4, thereby reducing the amount of injection molding head without changing the function of the three-plate injection mold, reducing the waste of injection molding raw materials, and saving production costs.

The bottom of the female mold plate 1 is provided with a second groove 12 inwardly, the female mold core 4 is embedded and connected in the second groove 12, and the bottom surface of the female mold core 4 is recessed in the second groove 12. The top of the male mold plate 2 is provided with a third groove 21, the male mold core 5 is embedded and connected in the third groove 21, and the top of the male mold core 5 is protruding outside the third groove 21. The male mold plate 2 and the female mold core 4 are in contact with each other on both sides, and grooves are respectively formed inwardly according to the shape of the product on the two contacting surfaces to form a molding cavity 6 for forming the product.

The working principle of the three-plate injection mold provided in this embodiment is as follows: during injection molding, the stripping plate 3 contacts the mother mold plate 1, the insert 7 is placed in the first groove 11, and the raw material comes out from the discharge port of the hot injection nozzle 8, that is, the injection port 71, to the material head groove 41, and the raw material then flows from the injection channel 42 to the molding cavity 6 to form a product; when discharging the material, the insert 7 moves up with the stripping plate 3, and after lifting the mother mold core 4, the material head and the product are obtained. The three-plate injection mold provided in this embodiment opens the first groove 11 on the mother mold plate 1, connects the protruding insert 7 at the bottom of the stripping plate 3, and sets the injection port 71 for raw material discharge at the bottom of the insert 7, so that the raw material is directly injected into the injection channel 42 in the mother mold core 4. Without changing the function of the three-plate injection mold, the amount of injection plastic head is reduced, the production output of the three-plate injection mold is improved, energy is saved and consumption is reduced, and production costs are reduced. As shown in Figures 5-6, compared with the prior art, the height of the injection molding head of the present application is only the height of the mother mold core, reducing the height of the mother mold plate part. The head height is reduced from 85cm to 40cm, and the head weight is reduced from 52g to 32g, a weight reduction of 38%.

In some embodiments, the insert 7 in this embodiment is detachably connected to the stripping plate 3 through a screw, making the overall installation of the mold more convenient and flexible. When producing different products, some parts can be replaced, making the mold more adaptable. In other embodiments, the insert 7 is integrally formed with the stripping plate 3, and the mold is more stable in use while ensuring its function.

As shown in FIG3 , in some embodiments, there are multiple injection channels 42 opened in the mother mold core 4 to ensure the quality of product molding. The sprue groove 41 is a through-branch structure and is connected to each injection channel 42. By designing the sprue groove 41 to be a through-branch structure, the volume of the sprue can be reduced while ensuring the injection molding process, so as to further reduce the amount of injection sprues used and save production costs.

In this application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the utility model and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (7)

1. A three-plate injection mold, comprising: a female template (1), a male template (2) connected with the bottom of the female template (1), and a stripping plate (3) positioned above the female template (1);

A female die core (4) and a male die core (5) are connected between the female die plate (1) and the male die plate (2), a forming cavity (6) is arranged between the female die core (4) and the male die core (5), a stub bar groove (41) is formed in the female die core (4), and an injection molding channel (42) which is communicated with the stub bar groove (41) and the forming cavity (6) is formed in the female die core (4); the female die plate (1) is provided with a first groove (11) communicated with the stub bar groove (41), the bottom of the stripper plate (3) is connected with an insert (7) matched with the first groove (11), the bottom of the insert (7) is provided with a material injection port (71), the material injection port (71) is communicated with the stub bar groove (41), a thermal injection nozzle (8) for injection molding extends from the stripper plate (3) to the insert (7), and injection molding materials are injected from the thermal injection nozzle (8) into the material injection port (71).

2. The three-plate injection mold according to claim 1, characterized in that the insert (7) is movably connected with the stripper plate (3).

3. The three-plate injection mold according to claim 1, characterized in that the insert (7) is integrally formed with the stripper plate (3).

4. A three-plate injection mold according to any one of claims 1 to 3, characterized in that the heat nozzle (8) is provided with a heat-injection sleeve (81) on the outside, and the heat-injection sleeve (81) is sealed with the insert (7).

5. A three-plate injection mold according to any one of claims 1-3, wherein there are a plurality of injection channels (42), and wherein the stub bar grooves (41) are in a through dendritic structure.

6. The three-plate injection mold according to claim 1, wherein a second groove (12) is formed in the bottom of the female mold plate (1) inwards, and the female mold insert (4) is connected in the second groove (12) in an embedded manner.

7. The three-plate injection mold according to claim 1, wherein a third groove (21) is formed at the top of the male mold plate (2), and the male mold core (5) is connected in the third groove (21) in an embedded manner.