Plastic injection molding mold

Abstract

The utility model discloses a plastic injection molding mold, which relates to the technical field of plastic injection molds and comprises a bottom plate, an upper cover plate is arranged above the bottom plate, an injection molding mechanism is arranged in the upper cover plate and comprises an upper mold, the upper mold is fixedly mounted on the inner wall of the upper cover plate, and the upper cover plate is fixedly mounted on the inner wall of the upper mold. A feeding opening is formed in the top of the upper mold, sliding grooves are formed in the two sides of the feeding opening correspondingly, connecting plates are slidably connected into the sliding grooves, the connecting plates are of L-shaped structures, second springs are fixedly connected to the tops of the connecting plates, and the ends, away from the connecting plates, of the second springs are fixedly connected to the sliding grooves; and a baffle is fixedly mounted at the bottom of the connecting plate. According to the utility model, the feed port is blocked by the baffle plate, so that the problems that liquid plastic flows back into the injection pipe, the amount of plastic actually injected into the cavity is reduced, a molded plastic product is uneven in hardness, insufficient in strength or poor in toughness and the like are solved.

Description

Technical Field

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

[0002] Molds refer to various molds and tools used in industrial production to obtain the desired products by injection molding, blow molding, extrusion, die casting or forging, smelting, stamping and other methods. In short, molds are tools used to make molded objects. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the shape of the object by changing the physical state of the molded material. Injection molding molds are used in the production process of plastic parts.

[0003] However, in the prior art, when high-temperature liquid plastic is injected into the mold, the liquid plastic is affected by gravity, resulting in the liquid plastic not being evenly filled in the mold cavity. This uneven filling may cause defects such as bubbles and gaps inside the product, affecting product quality. In addition, the traditional natural cooling molding process of plastic products takes a long time, reducing production efficiency.

[0004] Therefore, it is necessary to propose a plastic injection molding die to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a plastic injection molding mold to solve the problem that when high-temperature liquid plastic is injected into the mold, the liquid plastic is affected by gravity, resulting in the liquid plastic not being evenly filled in the mold cavity. This uneven filling may cause defects such as bubbles and gaps inside the product, affecting product quality. In addition, the traditional natural cooling molding process of plastic products takes a long time, which reduces the production efficiency.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a plastic injection molding mold, comprising a base plate, an upper cover plate is arranged above the base plate, an injection molding mechanism is arranged inside the upper cover plate, the injection molding mechanism comprises an upper mold, the upper mold is fixedly mounted on the inner wall of the upper cover plate, a feed port is provided at the top of the upper mold, slide grooves are provided on both sides of the feed port, and a connecting plate is slidably connected in the slide groove, the connecting plate is L-shaped, a second spring is fixedly connected to the top of the connecting plate, one end of the second spring away from the connecting plate is fixedly connected to the slide groove, and a baffle is fixedly mounted on the bottom of the connecting plate.

[0007] Preferably, a lower cover plate is provided below the upper cover plate, a mold mounting platform is fixedly installed inside the lower cover plate, a lower mold is fixedly installed on the top of the mold mounting platform, a stripping plate is movably provided on the lower mold, and the stripping plate is slidably connected to the lower cover plate.

[0008] Preferably, a first spring is fixedly mounted on the bottom of the stripping plate, and one end of the first spring away from the stripping plate is fixedly connected to the lower cover plate.

[0009] Preferably, a material injection pipe is fixedly installed on the top of the upper cover plate, the material injection pipe is connected with the feed port, and a one-way valve is fixedly installed on the material injection pipe.

[0010] Preferably, limit rods are fixedly installed on both sides of the lower cover plate, four limit rods are provided, and the four limit rods are respectively arranged at the four corners of the lower cover plate, the limit rods are slidably connected to the limit plates, and the limit plates are fixedly installed on the upper cover plate.

[0011] Preferably, a support frame is fixedly installed on the top of the base plate, two support frames are provided, and the two support frames are distributed in a mirror image, a transmission shaft is rotatably connected to the support frame, and one end of the transmission shaft away from the support frame is fixedly connected to the upper cover plate.

[0012] Preferably, a motor is fixedly mounted on one of the support frames, and a rotating shaft of the motor is fixedly connected to the transmission shaft.

[0013] Preferably, a liquid cooling pipe is fixedly installed inside the upper mold, and the liquid cooling pipe is curved.

[0014] The beneficial technical effects of the utility model are as follows: the feed port is blocked by the baffle, thereby preventing the liquid plastic from flowing back into the injection tube, reducing the amount of plastic actually injected into the cavity, and causing problems such as uneven hardness, insufficient strength or poor toughness of the molded plastic product; the injection molding mechanism is driven to rotate by the transmission shaft, thereby shaking the liquid plastic in the cavity evenly, avoiding the presence of bubbles and voids in the molded plastic product; and the cooperation of the stripping plate and the liquid cooling tube accelerates the molding of the liquid plastic and the removal of the molded plastic product, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the plastic injection molding mold of the utility model.

[0016] Figure 2 This is a structural sectional view of the injection molding mechanism of the utility model when it is opened.

[0017] Figure 3 For this utility model Figure 2 A magnified view of the structure in the middle.

[0018] Figure 4 It is a structural cross-sectional view of the injection molding mechanism of the utility model when it is fitted.

[0019] In the figure: 1. bottom plate; 2. upper cover plate; 3. lower cover plate; 4. mold mounting table; 5. lower mold; 6. liquid cooling pipe; 7. upper mold; 8. injection pipe; 9. first spring; 10. stripping plate; 11. limit plate; 12. limit rod; 13. connecting plate; 14. second spring; 15. baffle; 16. transmission shaft; 17. support frame; 18. motor; 19. feed port. DETAILED DESCRIPTION

[0020] 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.

[0021] like Figure 1-Figure 4 As shown, the utility model provides a plastic injection molding mold, comprising a base plate 1 , an upper cover plate 2 is arranged above the base plate 1 , and a lower cover plate 3 is arranged below the upper cover plate 2 .

[0022] Limit rods 12 are fixedly installed on both sides of the lower cover plate 3. Four limit rods 12 are provided, and the four limit rods 12 are respectively arranged at the four corners of the lower cover plate 3. The limit rods 12 are slidably connected to the limit plates 11, and the limit plates 11 are fixedly installed on the upper cover plate 2. The limit rods 12 cooperate with the limit plates 11 to ensure the accurate positioning of the mold and prevent the mold from shifting during operation.

[0023] An injection molding mechanism is arranged inside the upper cover plate 2, and the injection molding mechanism includes an upper mold 7, which is fixedly mounted on the inner wall of the upper cover plate 2. A mold mounting platform 4 is fixedly mounted inside the lower cover plate 3, and the mold mounting platform 4 is used to mount the mold (lower mold 5). The lower mold 5 is fixedly mounted on the top of the mold mounting platform 4.

[0024] A feed port 19 is provided at the top of the upper mold 7 , and an injection pipe 8 is fixedly installed on the top of the upper cover plate 2 . The injection pipe 8 is used to inject high-temperature liquid plastic. The injection pipe 8 is connected to the feed port 19 , and a one-way valve is fixedly installed on the injection pipe 8 .

[0025] During specific operation, the upper cover plate 2 and the lower cover plate 3 are fitted and fixed, so that the upper mold 7 and the lower mold 5 form a cavity, and high-temperature liquid plastic is injected into the injection pipe 8 to form the high-temperature injection plastic in the mold.

[0026] Taking into account that the liquid plastic is affected by gravity, resulting in the liquid plastic not being evenly filled in the mold cavity, a support frame 17 is fixedly installed on the top of the base plate 1, and the support frame 17 is used to support the rotation of the mold. Two support frames 17 are provided, and the two support frames 17 are distributed in a mirror image. A transmission shaft 16 is rotatably connected to the support frame 17, and a motor 18 is fixedly installed on one of the support frames 17. The rotating shaft of the motor 18 is fixedly connected to the transmission shaft 16, and the end of the transmission shaft 16 away from the support frame 17 is fixedly connected to the upper cover plate 2.

[0027] During specific operation, the motor 18 is started, and the transmission shaft 16 is driven to rotate by the motor 18, and the transmission shaft 16 drives the injection molding mechanism to rotate, so as to shake the liquid plastic in the cavity evenly, avoiding bubbles and voids inside the molded plastic product.

[0028] Furthermore, a liquid cooling tube 6 is fixedly installed inside the upper mold 7. It should be noted that the liquid cooling tube 6 contains water cooling liquid, which is a common heat dissipation component in the prior art and will not be described in detail here. The liquid cooling tube 6 is curved, and the curved structure can save space when laid. More liquid cooling tubes 6 can be laid to speed up plastic molding. By rotating the mold, the liquid cooling liquid in the liquid cooling tube 6 can transfer heat to a place far away from the upper mold 7, thereby speeding up the natural cooling molding process of the plastic product and improving production efficiency.

[0029] Considering that a small amount of liquid plastic may flow back to the injection pipe 8 through the feed port 19 during the rotation of the mold, resulting in a reduction in the amount of plastic actually injected into the cavity, leading to problems such as uneven hardness, insufficient strength or poor toughness of the molded plastic product, therefore, a slide groove is provided on both sides of the feed port 19, and a connecting plate 13 is slidably connected in the slide groove. The connecting plate 13 is an L-shaped structure. The L-shaped structure can ensure that when the liquid plastic is injected, the connecting plate 13 will not block the liquid plastic from flowing into the cavity. The top of the connecting plate 13 is fixedly connected to a second spring. 14. The second spring 14 is used to reset the baffle 15. Because when liquid plastic is injected into the cavity, a certain pressure will be generated in the pipeline. The pressure pushes the baffle 15 and stretches the second spring 14, so that the liquid plastic can enter the cavity. When the injection of liquid plastic is stopped, the pressure in the pipeline will gradually decrease, and the second spring 14 will reset. The baffle 15 blocks the feed port 19. The end of the second spring 14 away from the connecting plate 13 is fixedly connected to the slide groove. The bottom of the connecting plate 13 is fixedly installed with a baffle 15. The baffle 15 is used to prevent the liquid plastic from flowing back.

[0030] During specific operation, when the mold rotates, the baffle 15 blocks the feed port 19, thereby preventing the liquid plastic from flowing back into the injection tube 8, reducing the amount of plastic actually injected into the cavity, and causing problems such as uneven hardness, insufficient strength or poor toughness of the molded plastic product.

[0031] Furthermore, a stripper plate 10 is movably provided on the lower mold 5 , and the stripper plate 10 is slidably connected to the lower cover plate 3 .

[0032] A first spring 9 is fixedly mounted on the bottom of the stripper plate 10 , and one end of the first spring 9 away from the stripper plate 10 is fixedly connected to the lower cover plate 3 .

[0033] During specific operation, when the upper mold 7 is fitted with the lower mold 5, the upper mold 7 squeezes the stripping plate 10, the first spring 9 is compressed, the upper mold 7 is fitted on the stripping plate 10, and forms a cavity together with the lower mold 5. The molded plastic product will be placed on the stripping plate 10. When the upper mold 7 is separated from the lower mold 5, the first spring 9 is reset, so that the stripping plate 10 can remove the molded plastic product on the lower mold 5, thereby improving production efficiency.

Claims

1. A plastic injection molding mold, characterized in that: The invention relates to a molded product comprising a bottom plate (1), an upper cover plate (2) being arranged above the bottom plate (1), an injection molding mechanism being arranged inside the upper cover plate (2), the injection molding mechanism comprising an upper mold (7), the upper mold (7) being fixedly mounted on the inner wall of the upper cover plate (2), a feed port (19) being arranged at the top of the upper mold (7), slide grooves being arranged on both sides of the feed port (19), and a connecting plate (13) being slidably connected in the slide groove, the connecting plate (13) being of an L-shaped structure, a second spring (14) being fixedly connected at the top of the connecting plate (13), an end of the second spring (14) away from the connecting plate (13) being fixedly connected to the slide groove, and a baffle (15) being fixedly mounted at the bottom of the connecting plate (13).

2. The plastic injection molding die according to claim 1, characterized in that: A lower cover plate (3) is arranged below the upper cover plate (2); a mold mounting platform (4) is fixedly installed inside the lower cover plate (3); a lower mold (5) is fixedly installed on the top of the mold mounting platform (4); a stripping plate (10) is movably inserted into the lower mold (5); and the stripping plate (10) is slidably connected to the lower cover plate (3).

3. The plastic injection molding die according to claim 2, characterized in that: A first spring (9) is fixedly mounted on the bottom of the stripper plate (10); one end of the first spring (9) away from the stripper plate (10) is fixedly connected to the lower cover plate (3).

4. The plastic injection molding die according to claim 1, characterized in that: A material injection pipe (8) is fixedly mounted on the top of the upper cover plate (2); the material injection pipe (8) is connected to a material feed port (19); and a one-way valve is fixedly mounted on the material injection pipe (8).

5. The plastic injection molding die according to claim 2, characterized in that: Limiting rods (12) are fixedly mounted on both sides of the lower cover plate (3), four limiting rods (12) are provided, and the four limiting rods (12) are respectively arranged at the four corners of the lower cover plate (3), and the limiting rods (12) are slidably connected to the limiting plates (11), and the limiting plates (11) are fixedly mounted on the upper cover plate (2).

6. The plastic injection molding die according to claim 1, characterized in that: A support frame (17) is fixedly mounted on the top of the base plate (1), two support frames (17) are provided, and the two support frames (17) are distributed in a mirror image, a transmission shaft (16) is rotatably connected to the support frame (17), and one end of the transmission shaft (16) away from the support frame (17) is fixedly connected to the upper cover plate (2).

7. The plastic injection molding die according to claim 6, characterized in that: A motor (18) is fixedly mounted on one of the support frames (17), and a rotating shaft of the motor (18) is fixedly connected to the transmission shaft (16).

8. The plastic injection molding die according to claim 1, characterized in that: A liquid cooling pipe (6) is fixedly installed inside the upper mold (7), and the liquid cooling pipe (6) is in a curved shape.

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