Injection mold convenient to demold

Abstract

The utility model discloses an injection mold convenient to demold in the related technical field of injection molds, which comprises a main frame and a lower mold, the lower mold is arranged above the main frame, a lower support frame is fixedly arranged below the main frame, an air pump is fixedly arranged on the lower support frame, a refrigerator is arranged on the side edge of the air pump, and the refrigerator is connected with the main frame. And the air outlet end of the refrigerator is connected with a demolding main pipeline. According to the utility model, air subjected to cold treatment is utilized to jack up an injection molding product, and cold air can quickly cool the surface of the injection molding product, so that the condition that the surface of the injection molding product is easy to damage due to demolding when the injection molding product is not completely cooled due to errors of cooling time and cooling temperature is eliminated; and the multiple demolding pieces are arranged, so that the stress on the bottom surface of the injection molding product is uniform, the injection molding product is jacked up by the gas transmitting demolding pieces, no damage is caused to the injection molding product, the demolding efficiency is high, and the safety is good.

Description

Technical Field

[0001] The utility model belongs to the technical field related to injection molds, and in particular relates to an injection mold which is easy to demould. Background Art

[0002] An injection mold is a tool for producing plastic products and also a tool for giving plastic products a complete structure and precise size. Injection molding is a processing method used in the mass production of certain parts with complex shapes. Specifically, the heated and melted plastic is injected into the mold cavity by the injection molding machine under high pressure. After cooling and solidification, the molded product is obtained. Then, the mold is demoulded and the finished product is taken out. Patent number: CN202121623498.9 An injection mold that is easy to demould is provided with a demoulding plate and a demoulding drive part. The drive motor can be controlled to rotate the screw, so that the square rod can drive the demoulding plate in the injection mold. The stripper plate is used to slide upward in the inner cavity of the injection mold, so that the plastic part formed in the injection mold can be ejected from the inner cavity of the injection mold for demoulding. The operation is convenient and simple. The demoulding is performed using a stripper plate provided in the inner cavity of the injection mold, which can improve the demoulding efficiency. However, the stripper plate mainly serves as the bottom of the inner cavity of the mold or a part of the bottom. The lifting and lowering of the stripper plate is controlled by a threaded connection, and it is easy for the stripper plate to not fall into place. In order to lift the injection molded part, the stripper plate needs to be made of a hard material. Due to the errors in cooling time and cooling temperature, the mold may be demoulded before complete cooling, which makes the surface of the injection molded part easily damaged.

[0003] In view of this, the present utility model is proposed. Utility Model Content

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an injection mold that is easy to demould. To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0005] A mold for easy demoulding includes a main frame and a lower mold, wherein the lower mold is arranged above the main frame, and a lower support frame is fixedly arranged below the main frame. An air pump is fixedly arranged on the lower support frame, and a refrigerator is arranged on the side of the air pump. The air outlet end of the refrigerator is connected to a demoulding main pipeline, and the other end of the demoulding main pipeline is connected to the model cavity of the lower mold. A mold base plate is provided at the bottom of the lower mold, and a demoulding sheet is embedded in the mold base plate.

[0006] As a further solution of the present invention: nine demoulding sheets are provided, and the demoulding main pipe is divided into nine demoulding branch pipes through a pipe connector. The end positions of the demoulding branch pipes are located directly below the corresponding demoulding sheets, and gas can be supplied into the lower mold through the demoulding sheets.

[0007] As a further solution of the present invention: a top frame is provided above the main frame at a position on the side of the lower mold, a closing cylinder is installed on the top of the top frame, an upper mold is provided at the lower end of the cylinder rod of the closing cylinder, the upper mold and the lower mold are designed as a matching structure, and an injection port is provided on the side of the upper mold for connecting an injection pipe to inject molten raw materials into the mold cavity.

[0008] As a further solution of the present invention: a closing sealing groove is provided on the lower mold and the closing surface, and a sealing ring is provided in the closing sealing groove to enhance the overall sealing of the mold after closing. The four corners of the closing surface of the lower mold are processed with closing guide holes to ensure the closing accuracy and avoid misalignment.

[0009] As a further solution of the present invention: the lower support frame is fixedly arranged below the main frame by welding, the air pump and the refrigerator are connected by a pipeline, and the refrigerator can cool the gas supplied into the demoulding main pipeline.

[0010] As a further solution of the present invention: a pipe arrangement cavity is formed between the bottom of the mold base and the top surface of the main frame, and the demolding branch pipes are arranged in the pipe arrangement cavity. The demolding branch pipes are arranged in a cross-shaped structure, so that the bottom surface of the injection molded product is evenly stressed, and no damage is caused to the injection molded product. The demolding efficiency is high and the safety is good.

[0011] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art.

[0012] The utility model uses cold-treated gas to lift the injection molded product. The cold gas can quickly cool the surface of the injection molded part, eliminating the error in cooling time and cooling temperature, which causes the surface of the injection molded part to be easily damaged due to demoulding before complete cooling.

[0013] The demoulding sheet of the utility model is made of a polymer air-permeable and water-impermeable material, and a plurality of demoulding sheets are provided, so that the bottom surface of the injection molded product is evenly stressed. The gas-transmitting demoulding sheet lifts up the injection molded product without causing any damage to the injection molded product, and has high demoulding efficiency and good safety.

[0014] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are part of this application and are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. In the drawings:

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is the main view of the utility model;

[0018] Figure 3 This is a cross-sectional view of the lower mold of the present utility model;

[0019] Figure 4 It is a top view of the lower mold of the present utility model.

[0020] In the figure: 1. Main frame; 2. Top frame; 3. Lower mold; 4. Upper mold; 5. Closing cylinder; 6. Injection port; 7. Mold cavity; 8. Closing sealing groove; 9. Closing guide hole; 10. Lower support frame; 11. Air pump; 12. Refrigerator; 13. Demolding main pipeline; 14. Demolding sheet; 15. Demolding branch pipe; 16. Mold bottom plate; 17. Pipeline arrangement cavity; 18. Pipeline connector.

[0021] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0023] like Figures 1 to 4As shown, an injection mold that is easy to demold, includes a main frame 1 and a lower mold 3, the lower mold 3 is arranged above the main frame 1, and a lower support frame 10 is fixedly arranged below the main frame 1, an air pump 11 is fixedly arranged on the lower support frame 10, and a refrigerator 12 is arranged on the side of the air pump 11, the air outlet end of the refrigerator 12 is connected to a demolding main pipe 13, and the other end of the demolding main pipe 13 is connected to the model cavity 7 of the lower mold 3, and a mold base plate 16 is provided at the bottom of the lower mold 3, and a demolding sheet 14 is embedded on the mold base plate 16. The demolding sheet 14 is made of a polymer breathable and water-impermeable material, and a plurality of demolding sheets 14 are provided, so that the bottom surface of the injection molded product is evenly stressed, and the gas-transmitting demolding sheet 14 lifts the injection molded product without causing any damage to the injection molded product, with high demolding efficiency and good safety.

[0024] Among them, there are nine demoulding sheets 14, and the demoulding main pipe 13 is divided into nine demoulding branches 15 through the pipe connector 18. The end position of the demoulding branch pipe 15 is located directly below the corresponding demoulding sheet, and gas can be supplied into the lower mold 3 through the demoulding sheet 14.

[0025] A top frame 2 is provided above the main frame 1 at the side of the lower mold 3, and a closing cylinder 5 is installed on the top of the top frame 2. An upper mold 4 is provided at the lower end of the cylinder rod of the closing cylinder 5. The upper mold 4 and the lower mold 3 are designed as a matching structure. An injection port 6 is provided on the side of the upper mold 4 for connecting the injection pipe to inject molten raw materials into the model cavity 7.

[0026] The lower mold 3 and the closing surface are provided with a closing sealing groove 8, and a sealing ring is provided in the closing sealing groove 8 to enhance the overall sealing of the mold after closing. The four corners of the closing surface of the lower mold 3 are processed with closing guide holes 9 to ensure the closing accuracy and avoid misalignment.

[0027] The lower support frame 10 is fixedly arranged below the main frame 1 by welding, and the air pump 11 is connected to the refrigerator 12 by a pipeline. The refrigerator 12 can cool the gas supplied into the demoulding main pipeline 13.

[0028] A pipe arrangement cavity 17 is formed between the bottom of the mold base plate 16 and the top surface of the main frame 1. The demoulding branch pipe 15 is arranged in the pipe arrangement cavity 17. The demoulding branch pipe 15 is arranged in a cross-shaped structure, so that the bottom surface of the injection molded product is evenly stressed, without causing any damage to the injection molded product, and with high demoulding efficiency and good safety.

[0029] The working principle of the utility model is as follows: during the injection molding process, the upper mold 4 and the lower mold 3 are first closed, and the molten raw material is injected into the mold cavity 7 after the closing through the injection port 6. After a period of cooling, the mold can be demoulded. The air pump 11 and the refrigerator 12 are started, and the gas is cooled and cooled by the refrigerator 12 and then supplied to the demoulding main pipeline 13. Then, it is dispersed to the demoulding branch pipe 15 through the pipeline connector 18. The other end of the demoulding branch pipe 15 is provided with a demoulding sheet 14. The demoulding sheet 14 is made of a polymer breathable and water-impermeable material. Air can pass through the release sheet 14 into the mold cavity 7, but the molten raw material during the injection molding process will not pass through the release sheet 14. The injection molded product is lifted up by air pressure, and the cold air can quickly cool the surface of the injection molded part, eliminating the error caused by cooling time and cooling temperature, which causes the surface of the injection molded part to be easily damaged due to demoulding before complete cooling. There are multiple release sheets 14, so that the bottom surface of the injection molded product is evenly stressed. The gas-transmitting release sheet 14 lifts up the injection molded product without causing any damage to the injection molded product, and has high demoulding efficiency and good safety.

[0030] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments using the above-mentioned technical content without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. An injection mold for easy demoulding, comprising a main frame (1) and a lower mold (3), characterized in that: The lower mold (3) is arranged above the main frame (1), a lower support frame (10) is fixedly arranged below the main frame (1), an air pump (11) is fixedly arranged on the lower support frame (10), a refrigerator (12) is arranged on the side of the air pump (11), an air outlet end of the refrigerator (12) is connected to a demoulding main pipe (13), the other end of the demoulding main pipe (13) is connected to the mold cavity (7) of the lower mold (3), a mold base plate (16) is arranged at the bottom of the lower mold (3), and a demoulding sheet (14) is embedded on the mold base plate (16).

2. The injection mold for easy demoulding according to claim 1, characterized in that: Nine demoulding sheets (14) are provided, and the demoulding main pipe (13) is provided with nine demoulding branch pipes (15) through a pipe connector (18), and the end positions of the demoulding branch pipes (15) are located directly below the corresponding demoulding sheets (14).

3. The injection mold for easy demoulding according to claim 2, characterized in that: A top frame (2) is provided above the main frame (1) at a position on the side of the lower mold (3); a closing cylinder (5) is installed on the top of the top frame (2); an upper mold (4) is provided at the lower end of the cylinder rod of the closing cylinder (5); the upper mold (4) and the lower mold (3) are designed as a matching structure; an injection port (6) is provided on the side of the upper mold (4).

4. The injection mold for easy demoulding according to claim 3, characterized in that: The lower mold (3) and the box closing surface are provided with a box closing sealing groove (8), a sealing ring is provided in the box closing sealing groove (8), and the four corners of the box closing surface of the lower mold (3) are machined with box closing guide holes (9).

5. The injection mold for easy demoulding according to claim 4, characterized in that: The lower support frame (10) is fixedly arranged below the main frame (1) by welding, and the air pump (11) and the refrigerator (12) are connected via a pipeline.

6. The injection mold for easy demoulding according to claim 5, characterized in that: A pipe arrangement cavity (17) is formed between the bottom of the mold base plate (16) and the top surface of the main frame (1), and the demoulding branch pipes (15) are arranged in the pipe arrangement cavity (17). The demoulding branch pipes (15) are arranged in a cross-shaped structure.

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