Plastic product processing mold

Abstract

The utility model relates to the technical field of plastic processing, and discloses a plastic product processing mold which comprises a lower mold and an upper mold arranged on the lower mold, a forming cavity and an exhaust channel communicated with the forming cavity are formed in the lower mold, an exhaust needle piece is installed in the exhaust channel, and a plurality of air holes are formed in the exhaust needle piece; an air cylinder part connected with the upper die is installed on the outer side of the lower die, and the exhaust needle part is communicated with the air cylinder part through an air guide hose. The utility model provides a plastic product processing mould which solves the problem that plastic products are inconvenient to demould.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic processing, in particular to a plastic product processing mold. Background Art

[0002] Plastic products are a general term for daily and industrial products made of plastic as the main raw material. Plastic is a type of synthetic polymer material with plasticity. It is mainly composed of natural or synthetic resins and various additives. It can be molded into a certain shape under certain temperature and pressure conditions and keep the shape unchanged at room temperature. In the processing of plastic products, the thermoplastic plastic material is melted and injected into the mold cavity under high pressure. After the plastic cools and solidifies, the mold is opened to take out the product.

[0003] In the design of injection molds, an exhaust channel is usually set inside the mold, and an exhaust needle is installed in the exhaust channel. When the molten plastic is injected into the lower mold cavity under high pressure, the air and volatile gases originally in the cavity need to quickly escape through the preset exhaust channel. When the molten plastic flows and approaches the exhaust needle, due to the high pressure of the plastic, the exhaust needle will experience a passive downward pressure process, temporarily blocking part or all of the exhaust channel to limit the reverse flow of the plastic and maintain the exhaust efficiency;

[0004] After injection molding is completed and cooled and solidified, the plastic product has been formed, but due to its inherent viscosity and close fit with the mold surface, the plastic product is inconvenient to separate from the mold, which easily causes demoulding difficulties.

[0005] In order to solve the above problems, this application proposes a plastic product processing mold. Utility Model Content

[0006] Based on the technical problems existing in the background technology, the utility model proposes a plastic product processing mold.

[0007] The utility model provides a plastic product processing mold, comprising a lower mold and an upper mold arranged on the lower mold;

[0008] The lower mold is provided with a molding chamber and an exhaust channel connected with the molding chamber, an exhaust needle is installed in the exhaust channel, and a plurality of air holes are provided on the exhaust needle;

[0009] An air cylinder member connected to the upper mold is installed on the outer side of the lower mold, and the exhaust needle member is connected to the air cylinder member through an air guide hose.

[0010] Preferably, the exhaust needle member includes an exhaust pipe, a spring and a blocking block, the spring is installed at the bottom of the exhaust channel, the exhaust pipe is vertically arranged in the exhaust channel, and the bottom end of the exhaust pipe is connected to the top of the spring, a conical opening is formed at the top of the exhaust channel, the blocking block is installed at the top of the exhaust pipe and is located in the conical opening, the blocking block is a conical structure and is adapted to the conical opening, and an air passage is formed between the blocking block and the inner wall of the conical opening.

[0011] Preferably, the air holes are arranged at intervals on the exhaust pipe.

[0012] Preferably, the cylinder component includes a cylinder body, which is mounted on the outer side of the lower mold, and a fixed block located above the cylinder body is mounted on the outer side of the upper mold. An air cavity is opened in the cylinder body, a piston is arranged in the air cavity, a movable rod is mounted on the piston, and the top end of the movable rod slides through the top end of the cylinder body and is connected to the fixed block.

[0013] Preferably, the two ends of the air guide hose are respectively connected to the outer periphery of the top of the gas cylinder body and the bottom end of the exhaust pipe, the air guide hose is respectively connected to the air cavity and the exhaust pipe, and a channel for the air guide hose to pass through is opened in the lower mold.

[0014] The above technical solution of the utility model has the following beneficial technical effects:

[0015] By means of the exhaust needle piece, air hole and air cylinder piece, when the molten plastic is injected into the molding chamber of the lower mold under high pressure, the air originally existing in the molding chamber will be discharged through the preset exhaust channel. In the process of the molten plastic flowing and approaching the exhaust needle piece, due to the high pressure of the plastic, the exhaust needle piece will experience a passive downward pressure process to temporarily block the exhaust channel. After the plastic is molded, the port of the exhaust channel can be blocked at the periphery of the lower mold. When the mold is opened, the upper mold moves away from the lower mold to drive the air cylinder piece to move upward. The gas in the air cylinder piece can be guided to the exhaust needle piece along the air guide hose, and then discharged through the air hole opened on the exhaust needle piece. A certain pressure generated in the exhaust channel can support the plastic upward through the exhaust needle piece under the action of pressure, and the high-pressure gas can enter the molding chamber to exert a certain gas pressure on the plastic, so that the plastic can be better separated from the molding chamber. The structure utilizes the pressure of the gas to facilitate the demolding of the plastic and improve the demolding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a structural schematic diagram of a plastic product processing mold.

[0017] Figure 2 For this utility model Figure 1 Schematic diagram of the local structure in.

[0018] Figure numerals: 1, lower mold; 2, upper mold; 3, molding chamber; 4, exhaust channel; 5, exhaust needle; 51, exhaust pipe; 52, spring; 53, blocking block; 6, air hole; 7, cylinder part; 71, cylinder body; 72, movable rod; 73, piston; 8, air guide hose; 9, fixing block. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0020] like Figure 1 and Figure 2 As shown, a plastic product processing mold proposed by the utility model comprises a lower mold 1 and an upper mold 2 arranged on the lower mold 1;

[0021] In this embodiment, a molding chamber 3 and an exhaust channel 4 connected to the molding chamber 3 are provided in the lower mold 1. An exhaust needle 5 is installed in the exhaust channel 4. A plurality of air holes 6 are provided on the exhaust needle 5. The exhaust needle 5 includes an exhaust pipe 51, a spring 52 and a blocking block 53. The spring 52 is installed at the bottom of the exhaust channel 4. The exhaust pipe 51 is vertically arranged in the exhaust channel 4, and the bottom end of the exhaust pipe 51 is connected to the top end of the spring 52. A conical opening is formed at the top end of the exhaust channel 4. The blocking block 53 is installed at the top end of the exhaust pipe 51 and is located in the conical opening. The blocking block 53 is a conical structure and is adapted to the conical opening. An air passage is formed between the blocking block 53 and the inner wall of the conical opening. A plurality of air holes 6 are provided on the exhaust pipe 51 at intervals.

[0022] In this embodiment, the outer side of the lower mold 1 is provided with a cylinder member 7 connected to the upper mold 2, and the exhaust needle member 5 is connected to the cylinder member 7 through an air guide hose 8. The cylinder member 7 includes a cylinder body 71, which is provided on the outer side of the lower mold 1, and a fixed block 9 located above the cylinder body 71 is provided on the outer side of the upper mold 2. An air cavity is provided in the cylinder body 71, and a piston 73 is provided in the air cavity. A movable rod 72 is provided on the piston 73, and the top of the movable rod 72 slides through the top of the cylinder body 71 and is connected to the fixed block 9. The two ends of the air guide hose 8 are respectively connected to the outer periphery of the top of the cylinder body 71 and the bottom end of the exhaust pipe 51, and the air guide hose 8 is respectively connected to the air cavity and the exhaust pipe 51, and a passage for the air guide hose 8 to pass through is provided in the lower mold 1.

[0023] It should be noted that: when the molten plastic is injected into the molding chamber 3 of the lower mold 1 under high pressure, the air originally existing in the molding chamber 3 will be discharged through the preset exhaust channel 4. In the process of the molten plastic flowing and approaching the blocking block 53, due to the high pressure of the plastic, the blocking block 53 will experience a passive downward pressure process, and the spring 52 at the bottom end of the exhaust pipe 51 will be compressed, and the blocking block 53 will fit with the conical mouth at the top of the exhaust channel 4 to temporarily block the exhaust channel 4. After the plastic molding is completed, the port of the exhaust channel 4 can be blocked on the periphery of the lower mold 1. When the mold is opened, the upper mold 2 is away from the lower mold 1 and can drive the movable rod 72 to pull the piston 7 upward through the fixed block 9. 3. When the piston 73 moves upward, the gas in the cylinder body 71 can be guided to the exhaust pipe 51 along the air guide hose 8, and then discharged through the air hole 6 opened on the exhaust pipe 51. A certain pressure generated in the exhaust channel 4 can push the plastic upward through the blocking block 53 on the exhaust pipe 51 under the action of the gas pressure and the elasticity of the spring 52, and the high-pressure gas can enter the molding chamber 3 along the air passage formed between the blocking block 53 and the inner wall of the tapered mouth, and exert a certain gas pressure on the plastic, so that the plastic can be better separated from the molding chamber 3. This structure uses the gas pressure to facilitate the demolding of the plastic and improve the demolding effect.

[0024] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. A plastic product processing mold, comprising a lower mold (1) and an upper mold (2) arranged on the lower mold (1), characterized in that: The lower mold (1) is provided with a molding chamber (3) and an exhaust channel (4) connected to the molding chamber (3); an exhaust needle (5) is installed in the exhaust channel (4); and a plurality of air holes (6) are provided on the exhaust needle (5); An air cylinder component (7) connected to the upper mold (2) is installed on the outer side of the lower mold (1), and the exhaust needle component (5) is connected to the air cylinder component (7) via an air guide hose (8).

2. A plastic product processing mold according to claim 1, characterized in that: The exhaust needle member (5) comprises an exhaust pipe (51), a spring (52) and a blocking block (53); the spring (52) is installed at the bottom of the exhaust channel (4); the exhaust pipe (51) is vertically arranged in the exhaust channel (4); the bottom end of the exhaust pipe (51) is connected to the top end of the spring (52); a conical opening is formed at the top end of the exhaust channel (4); the blocking block (53) is installed at the top end of the exhaust pipe (51) and is located in the conical opening; the blocking block (53) is a conical structure and is adapted to the conical opening; an air passage is formed between the blocking block (53) and the inner wall of the conical opening.

3. A plastic product processing mold according to claim 2, characterized in that: A plurality of the air holes (6) are arranged at intervals on the exhaust pipe (51).

4. A plastic product processing mold according to claim 3, characterized in that: The cylinder member (7) comprises a cylinder body (71), the cylinder body (71) being mounted on the outer side of the lower mold (1), a fixing block (9) being mounted on the outer side of the upper mold (2) and being located above the cylinder body (71), an air cavity being provided in the cylinder body (71), a piston (73) being arranged in the air cavity, a movable rod (72) being mounted on the piston (73), the top end of the movable rod (72) slidingly passing through the top end of the cylinder body (71) and being connected to the fixing block (9).

5. A plastic product processing mold according to claim 4, characterized in that: The two ends of the air guide hose (8) are respectively connected to the outer periphery of the top end of the air cylinder body (71) and the bottom end of the exhaust pipe (51); the air guide hose (8) is respectively connected to the air cavity and the exhaust pipe (51); and a passage for the air guide hose (8) to pass through is provided in the lower mold (1).

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