Vacuumizing injection mold structure

Abstract

The utility model discloses a vacuumizing injection mold structure which comprises an injection mold body, the injection mold body is a rectangular body, the injection mold body comprises a front mold and a rear mold, an ejector plate is arranged in the front mold, two opposite side surfaces of the front mold are respectively provided with an opening, the two openings are respectively positioned on two sides of the ejector plate, and the ejector plate is arranged in the front mold. Exhaust pipes are respectively arranged on the other two opposite side surfaces of the front mold; the vacuumizing injection mold structure further comprises two sealing plates, the two sealing plates are located on the outer sides of the two openings respectively, each sealing plate is detachably and fixedly connected with the side face of the front mold, and each sealing plate is used for sealing the corresponding opening. According to the vacuumizing injection mold structure, the structure is reasonable, the sealing plates are additionally arranged to seal the openings in the two sides of the ejector plate, external air is prevented from entering the mold from the openings, a closed space is formed in the mold, the vacuum degree in the mold cavity can be improved, and then the production quality of products is improved.

Description

Technical Field

[0001] This utility model relates to a vacuum injection mold structure. Background Technology

[0002] Plastic products often encounter a series of problems during the production process, such as excessive porosity, poor mechanical properties, and poor appearance quality. To improve the quality and performance of plastic products, the mainstream approach is to use vacuum injection molds.

[0003] Existing vacuum injection molds typically include an ejector mechanism for easy product demolding. This mechanism usually consists of ejector pins and an ejector plate. The front mold of the injection mold has ejector holes through which the ejector pins pass and communicate with the mold cavity. The ejector pins can move within these holes to eject the product. Traditional injection mold structures have openings on both sides of the ejector plate. However, during vacuuming, outside air can easily be drawn into the mold through these openings. This air then flows out from one end of the ejector hole through the gap between the ejector pin and the ejector hole, and then back into the mold cavity from the other end. This prevents the mold cavity from achieving the required vacuum level, negatively impacting production quality. Summary of the Invention

[0004] The purpose of this utility model is to provide a vacuum injection mold structure with a reasonable structure. By adding a sealing plate to close the openings on both sides of the ejector plate, external air is prevented from entering the mold from the openings, thus forming a closed space inside the mold. This helps to improve the vacuum level in the cavity and thereby improve the production quality of the product.

[0005] To achieve the above objectives, the technical solution of this utility model is to design a vacuum injection mold structure, including an injection mold body, the injection mold body being a rectangular body, and the injection mold body including a front mold and a rear mold, the front mold having an ejector plate, and openings on two opposite sides of the front mold, the two openings being located on both sides of the ejector plate, and vacuum pipes on the other two opposite sides of the front mold.

[0006] The vacuum injection mold structure also includes two sealing plates, which are located on the outside of the two openings respectively. Each sealing plate is detachably and fixedly connected to the side of the front mold, and each sealing plate is used to close the corresponding opening.

[0007] Preferably, a sealing ring is pressed between the sealing plate and the side of the front mold, and the sealing ring is located at the periphery of the opening.

[0008] Preferably, the sealing plate is provided with an annular groove, and the sealing ring is embedded in the annular groove.

[0009] Preferably, the sealing plate is fixedly connected to the side of the front mold by screws.

[0010] Preferably, the front mold and the rear mold are closed to form a cavity, and the front mold is provided with a front mold sealing groove located on the periphery of the cavity, and the front mold sealing groove is used to embed a sealing element.

[0011] The vacuum injection mold structure provided by this utility model has at least the following advantages compared with the prior art:

[0012] This invention adds a sealing plate to seal the openings on both sides of the ejector plate, preventing outside air from entering the mold through the openings, thus creating a closed space inside the mold. This helps to improve the vacuum level inside the cavity and thereby improve the production quality of the product.

[0013] This invention improves the sealing effect of the sealing plate on the opening by setting a sealing ring; and by setting an annular groove on the sealing plate, the sealing ring is embedded in the annular groove, which facilitates the positioning and installation of the sealing ring.

[0014] This invention facilitates the installation and removal of the sealing plate by using screws to fix the sealing plate to the side of the front mold.

[0015] This invention improves the sealing effect of the cavity by setting a front mold sealing groove on the front mold located on the periphery of the cavity, and embedding a sealing element in the front mold sealing groove. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the present invention. Figure 1 .

[0017] Figure 2 This is a schematic diagram of the present invention. Figure 2 .

[0018] Figure 3 This is a schematic diagram of the front mold and the rear mold in this utility model.

[0019] Reference numerals in the attached drawings: 1. Front mold; 2. Rear mold; 3. Ejector plate; 4. Opening; 5. Air extraction pipe; 6. Sealing plate; 7. Sealing ring; 8. Annular groove; 9. Screw; 10. Front mold sealing groove. Detailed Implementation

[0020] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0021] The specific technical solution of this utility model is as follows:

[0022] In one specific embodiment, such as Figure 1 and Figure 2As shown, this utility model provides a vacuum injection mold structure, including an injection mold body, the injection mold body is a rectangular body, and the injection mold body includes a front mold 1 and a rear mold 2. The front mold 1 is provided with an ejector plate 3, and the two opposite sides of the front mold 1 are respectively provided with openings 4. The two openings 4 are respectively located on both sides of the ejector plate 3. The other two opposite sides of the front mold 1 are respectively provided with vacuum pipes 5.

[0023] The vacuum injection molding mold structure also includes two sealing plates 6, which are located on the outside of the two openings 4 respectively. Each sealing plate 6 is detachably and fixedly connected to the side of the front mold 1, and each sealing plate 6 is used to close the corresponding opening 4.

[0024] The above-mentioned solution involves the following: During operation, the external vacuum injection mold structure of this invention connects to the extraction pipe 5 on the mold via an external vacuum device, forming a closed loop. From the start of injection molding, the vacuum device continuously extracts air from the mold cavity until the entire injection cycle is complete. Furthermore, by adding a sealing plate 6 to seal the openings 4 on both sides of the ejector plate 3, external air is prevented from entering the mold through the openings 4 during extraction, creating a closed space inside the mold. This improves the vacuum level within the cavity, thereby enhancing the product's manufacturing quality.

[0025] In another specific embodiment, such as Figure 1 As shown, a sealing ring 7 is pressed between the sealing plate 6 and the side of the front mold 1, and the sealing ring 7 is located around the opening 4.

[0026] The above solution, by setting the sealing ring 7, helps to further improve the sealing effect of the sealing plate 6 on the opening 4.

[0027] In another specific embodiment, such as Figure 1 As shown, the sealing plate 6 is provided with an annular groove 8, and the sealing ring 7 is embedded in the annular groove 8.

[0028] The above solution is adopted: by setting an annular groove 8 on the sealing plate 6, the sealing ring 7 is embedded in the annular groove 8, which facilitates the positioning and installation of the sealing ring 7.

[0029] In another specific embodiment, such as Figure 2 As shown, the sealing plate 6 is fixedly connected to the side of the front mold 1 by screws 9.

[0030] The above solution is adopted: by setting the sealing plate 6 to be fixedly connected to the side of the front mold 1 with screws 9, the installation and disassembly of the sealing plate 6 are facilitated.

[0031] In another specific embodiment, such as Figure 3As shown, the front mold 1 and the rear mold 2 are closed to form a cavity. The front mold 1 is provided with a front mold sealing groove 10 located on the periphery of the cavity. The front mold sealing groove 10 is used to embed a sealing element.

[0032] The above solution is adopted: by setting a front mold sealing groove 10 on the front mold 1 located on the periphery of the cavity, the front mold sealing groove 10 is used to embed sealing elements, which helps to improve the sealing effect of the cavity.

[0033] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A vacuum injection mold structure, comprising an injection mold body, the injection mold body being a rectangular body, and the injection mold body comprising a front mold (1) and a back mold (2), a pin plate (3) being arranged in the front mold (1), and two opposite sides of the front mold (1) being respectively provided with an opening (4), the two openings (4) being respectively located at two sides of the pin plate (3), and the other two opposite sides of the front mold (1) being respectively provided with an air exhaust pipe (5), characterized in that: the vacuum injection mold structure further comprises two sealing plates (6), the two sealing plates (6) being respectively located outside the two openings (4), each sealing plate (6) being detachably fixedly connected with the side of the front mold (1), and each sealing plate (6) being used for closing the corresponding opening (4). A sealing ring (7) is tightly arranged between the sealing plate (6) and the side of the front mold (1), and the sealing ring (7) is located outside the opening (4).

2. The vacuum-assisted injection mold structure of claim 1, wherein, An annular groove (8) is arranged on the sealing plate (6), and the sealing ring (7) is embedded in the annular groove (8).

3. The vacuum-assisted injection mold structure of claim 2, wherein, The sealing plate (6) is fixedly connected with the side of the front mold (1) through a screw (9).

4. The vacuum-assisted injection mold structure of claim 1, wherein, The front mold (1) and the back mold are closed to form a cavity, a front mold sealing groove (10) is arranged on the front mold (1) and located outside the cavity, and the front mold sealing groove (10) is used for embedding a sealing element.

5. The vacuum-assisted injection mold structure of claim 1, wherein, ​

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