Injection mold with adjustable cavity size

Abstract

The utility model relates to the field of injection molds, and discloses an injection mold capable of adjusting the size of a cavity, which comprises a lower mold, the lower mold is arranged above a placing plate, an upper mold is arranged above the lower mold, a pouring pipe is arranged on the upper mold, the upper mold corresponds to the lower mold, and the lower mold is arranged above the placing plate. Mounting holes are formed in the left side and the right side of the lower mold and communicate with an inner cavity of the lower mold, two through holes are formed in the left side and the right side of each of the lower mold and the upper mold, air cylinders are fixed to the inner walls of the through holes, and limiting plates are fixed to one ends of telescopic rods of the air cylinders; and the limiting plate and the inner cavity of the lower mold are arranged in a sliding manner. According to the utility model, the air cylinder is matched with the scale hole, so that a worker can flexibly adjust the position of the limiting plate according to the injection molding requirement, the displacement phenomenon of the limiting plate is effectively prevented under the action of the positioning pin, the change of the cavity is effectively prevented, and the injection molding quality of a product is further ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold with adjustable cavity size. Background Art

[0002] In the production of small parts, injection molding is often used. Molds are various molds and tools used to produce the desired product through methods such as injection molding, blow molding, and stamping. Injection molds have limitations in their molding range. For molded parts of varying heights, multiple matching molds must be produced, increasing the cost of equipment production for the molding factory.

[0003] The Chinese patent with announcement number CN217916517U is an adjustable injection mold, including a lower mold and a movable support assembly arranged inside the lower mold for space adjustment. The upper surface of the lower mold is provided with an electric telescopic rod, and the top of the electric telescopic rod is provided with an upper mold. A mold cavity is provided on one side of the lower mold and the upper mold, and an injection port is provided on the upper surface of the upper mold.

[0004] In the above scheme, the height distance between the adjustment plate and the upper surface of the mold cavity is adjusted by a moving mechanism, so that the mold can meet the injection molding requirements of injection molded products of different heights during the injection molding process. However, it has the following disadvantages: the moving mechanism of this mold is not provided with a limiting structure, resulting in the bidirectional screw being easily rotated due to pressure during the injection molding process, which makes the product prone to defects and reduces the injection molding quality of the product. Utility Model Content

[0005] The purpose of the utility model is to provide an injection mold with adjustable cavity size to solve the problem that the moving mechanism of the mold is not provided with a limit structure, resulting in the bidirectional screw being easily rotated by pressure during the injection molding process of the product.

[0006] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical solutions: an injection mold with adjustable cavity size, including a lower mold, the lower mold is arranged above a placement plate, an upper mold is arranged above the lower mold, a casting tube is arranged on the upper mold, the upper mold corresponds to the lower mold, and mounting holes are provided on the left and right sides of the lower mold, the mounting holes are connected to the internal cavity of the lower mold, the lower mold and the upper mold have two through holes on the left and right sides, a cylinder is fixed on the inner wall of the through hole, one end of the cylinder telescopic rod is fixed to a limit plate, and the limit plate It is slidingly arranged with the internal cavity of the lower mold, and two connecting columns are fixed on one side of the limit plate, and the connecting columns are slidably connected to the through holes. The outer wall of the connecting column on the lower mold is provided with a scale hole, and a positioning pin is clamped in the scale hole. The top surface of the limit plate on the lower mold is fixed with two clamping plates, and the bottom surface of the limit plate on the upper mold is provided with two clamping grooves, and the clamping plates are clamped with the clamping grooves. The cooperation between the cylinder and the limit plate enables the upper mold and the lower mold to adapt to the production needs of various products, thereby reducing the cost of the upper mold and the lower mold, and thus improving the flexibility of product production.

[0007] Preferably, the top surface of the clamping plate is provided with an arc surface, which enables the clamping plate to quickly clamp with the clamping groove when the lower mold and the upper mold are closed, so that the lower limit plate can drive the upper limit plate to move when moving, thereby adjusting the internal cavities of the upper and lower molds at the same time.

[0008] Preferably, a mounting bracket is fixed to the top surface of the placement plate, and a driving member is fixed on the mounting bracket. The driving member can drive the upper mold to move, which can effectively prevent position deviation caused by manual mold closing, thereby improving the accuracy of mold closing while saving a lot of labor.

[0009] Preferably, a support frame is fixed to the bottom surface of the driving member, and the support frame corresponds to the pouring port. The support frame can provide protection for the pouring pipe when the driving member is working to prevent damage such as rupture at the connection part.

[0010] Preferably, limiting holes are provided at the four corners of the top surface of the upper mold, and limiting columns are fixed at the four corners of the top surface of the lower mold. The limiting columns are slidably connected to the limiting holes, and a larger clamping force will be generated during injection molding. The structure of the limiting columns and the limiting holes can withstand part of the clamping force, share the force on other components of the upper mold and the lower mold, and improve the overall structural strength of the upper mold and the lower mold.

[0011] Preferably, a sealing gasket is fixed to the top surface of the lower mold, and the top surface of the sealing gasket contacts the bottom surface of the upper mold. Since the sealing gasket prevents plastic from overflowing, the amount of plastic inside the cavity can be accurately controlled, which helps to improve the final dimensional accuracy of the product.

[0012] Preferably, the front and rear sides of the lower mold and the upper mold are provided with mounting grooves, and the inner walls of the mounting grooves are fixed with cooling modules. The rapid cooling of the cooling modules can shorten the injection molding cycle. When the cooling modules effectively reduce the temperature of the lower mold and the upper mold, the plastic can reach the demolding temperature faster, so that the next injection molding operation can be performed faster.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. Through the cooperation of the cylinder and the scale hole, the staff can flexibly adjust the position of the limit plate according to the injection molding requirements, so that the limit plate can be effectively prevented from shifting under the action of the positioning pin, and the cavity can be effectively prevented from changing, thereby ensuring the injection molding quality of the product. When the size of the cavity needs to be adjusted, the staff can first close the upper mold and the lower mold, and then start the cylinder. The cylinder will drive the limit plate to move in the cavity. When it moves to the appropriate position, the upper mold can be moved. After checking the size of the injection molding cavity, the positioning pins can be respectively inserted into the two inner and outer card scale holes of the lower mold, and then the mold can be closed again for injection molding.

[0015] Second, the support frame can be used to limit and fix the casting tube. When plastic flows at high pressure and speed, it will exert a large impact on the casting tube. The support frame can enhance the structural stability of the casting tube and prevent it from shaking or deforming during the injection molding process. The cooperation between the limit column and the limit hole can provide the correct direction guidance for the closing of the upper and lower molds, preventing deviation during the closing process, thereby ensuring the accurate closing of the upper and lower molds.

[0016] Third, the sealing gasket can improve the sealing between the upper and lower molds, effectively preventing the material from overflowing from the connection between the upper and lower molds, thereby saving material and preventing the overflow from polluting the upper and lower molds and the environment. During the injection molding process, the cooling module can quickly remove the heat from the lower and upper molds, allowing the plastic to solidify at the appropriate temperature, thereby improving product molding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0018] Figure 2 It is an explosion diagram of the utility model;

[0019] Figure 3 for Figure 2 Explosion diagram of the middle limit plate and connecting column;

[0020] Figure 4 for Figure 2 Enlarged schematic diagram of point A in the middle.

[0021] In the figure: 1. Lower mold; 2. Placement plate; 3. Upper mold; 4. Mounting hole; 5. Through hole; 6. Cylinder; 7. Limit plate; 8. Connecting column; 9. Scale hole; 10. Snap-in plate; 11. Snap-in groove; 12. Mounting frame; 13. Driving part; 14. Support frame; 15. Limit hole; 16. Limit column; 17. Sealing gasket; 18. Mounting groove; 19. Cooling module. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0023] like Figure 1-Figure 4 As shown, the injection mold with adjustable cavity size includes a lower mold 1, which is arranged above a placement plate 2, an upper mold 3 is arranged above the lower mold 1, a casting tube is arranged on the upper mold 3, the upper mold 3 corresponds to the lower mold 1, and mounting holes 4 are provided on the left and right sides of the lower mold 1, the mounting holes 4 are connected to the internal cavity of the lower mold 1, and two through holes 5 are provided on the left and right sides of the lower mold 1 and the upper mold 3, and a cylinder 6 is fixed to the inner wall of the through hole 5, and one end of the telescopic rod of the cylinder 6 is fixed with a limited The positioning plate 7 and the limit plate 7 are slidingly arranged with the internal cavity of the lower mold 1. Two connecting columns 8 are fixed on one side of the limiting plate 7. The connecting columns 8 are slidingly connected with the through holes 5. The outer wall of the connecting column 8 on the lower mold 1 is provided with a scale hole 9. A positioning pin is clamped in the scale hole 9. Two clamping plates 10 are fixed on the top surface of the limiting plate 7 on the lower mold 1. Two clamping grooves 11 are provided on the bottom surface of the limiting plate 7 on the upper mold 3. The clamping plate 10 is clamped with the clamping groove 11, and the top surface of the clamping plate 10 is provided with an arc surface.

[0024] During use, through the cooperation of the cylinder 6 and the scale hole 9, the staff can flexibly adjust the position of the limit plate 7 according to the injection molding requirements, thereby effectively preventing the limit plate 7 from shifting under the action of the positioning pin, effectively preventing the cavity from changing, and thus ensuring the injection molding quality of the product. When it is necessary to adjust the size of the cavity, the staff can first close the upper mold 3 and the lower mold 1. After closing the mold, the cylinder 6 can be started. The cylinder 6 will drive the limit plate 7 to move in the cavity. When it moves to the appropriate position, the upper mold 3 can be moved. After checking the size of the injection molding cavity, the positioning pins can be respectively inserted into the two inner and outer card scale holes 9 of the lower mold 1, so that the mold can be closed again for injection molding. Through the cooperation of the cylinder 6 and the limit plate 7, the upper mold 3 and the lower mold 1 can adapt to the production needs of various products, thereby reducing the cost of the upper mold 3 and the lower mold 1, and thus improving the flexibility of product production. The arc surface allows the clamping plate 10 to quickly engage with the clamping groove 11 when the lower mold 1 and the upper mold 3 are closed, so that the lower limit plate 7 can drive the upper limit plate 7 to move when moving, thereby adjusting the internal cavities of the upper mold 3 and the lower mold 1 at the same time.

[0025] like Figure 1 、 Figure 2 and Figure 4 As shown, a mounting bracket 12 is fixed to the top surface of the placement plate 2, a driving member 13 is fixed on the mounting bracket 12, a support frame 14 is fixed to the bottom surface of the driving member 13, the support frame 14 corresponds to the pouring port, and limiting holes 15 are provided at the four corners of the top surface of the upper mold 3, and limiting columns 16 are fixed at the four corners of the top surface of the lower mold 1, and the limiting columns 16 are slidably connected to the limiting holes 15.

[0026] During use, the upper mold 3 can be moved by the driving member 13, effectively preventing positional deviation caused by manual mold closing, thereby improving mold closing accuracy while saving a lot of labor. The support frame 14 can limit and fix the pouring tube. When plastic flows at high pressure and speed, it will generate a large impact force on the pouring tube. The support frame 14 can enhance the structural stability of the pouring tube and prevent it from shaking or deforming during the injection molding process. At the same time, the support frame 14 can provide protection for the pouring tube when the driving member 13 is working, preventing damage such as cracking at the connection. The cooperation between the limiting column 16 and the limiting hole 15 can provide correct directional guidance for the closing of the upper mold 3 and the lower mold 1, preventing deviation during the closing process, thereby ensuring the accurate closing of the upper mold 3 and the lower mold 1. At the same time, the structure of the limiting column 16 and the limiting hole 15 can withstand part of the clamping force generated during injection molding, sharing the force on other components of the upper mold 3 and the lower mold 1, and improving the overall structural strength of the upper mold 3 and the lower mold 1.

[0027] like Figure 1 、 Figure 2 and Figure 4 As shown, a sealing gasket 17 is fixed to the top surface of the lower mold 1, and the top surface of the sealing gasket 17 contacts the bottom surface of the upper mold 3. The front and rear sides of the lower mold 1 and the upper mold 3 are both provided with mounting grooves 18, and the inner wall of the mounting groove 18 is fixed with a cooling module 19.

[0028] During use, the sealing gasket 17 can increase the sealing between the upper mold 3 and the lower mold 1, and can effectively prevent the raw material from overflowing from the connection between the upper mold 3 and the lower mold 1, thereby saving raw materials and preventing the overflowed raw materials from polluting the upper mold 3, the lower mold 1 and the environment. At the same time, because the sealing gasket 17 prevents the plastic from overflowing, the amount of plastic inside the cavity can be accurately controlled, which helps to improve the final dimensional accuracy of the product. During the injection molding process, the plastic raw material can be heated and melted in the cavity and then cooled and formed by the cooling module 19. The cooling module 19 can quickly take away the heat from the lower mold 1 and the upper mold 3, so that the plastic can solidify at a suitable temperature, thereby improving the molding efficiency of the product. At the same time, the rapid cooling of the cooling module 19 can shorten the injection molding cycle. When the cooling module 19 effectively reduces the temperature of the lower mold 1 and the upper mold 3, the plastic can reach the demoulding temperature more quickly, so that the next injection molding operation can be performed more quickly.

[0029] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An injection mold with adjustable cavity size, comprising a lower mold (1), wherein the lower mold (1) is arranged above a placement plate (2), and is characterized in that: An upper mold (3) is provided above the lower mold (1), a casting pipe is provided on the upper mold (3), the upper mold (3) corresponds to the lower mold (1), mounting holes (4) are provided on the left and right sides of the lower mold (1), the mounting holes (4) are communicated with the inner cavity of the lower mold (1), two through holes (5) are provided on the left and right sides of the lower mold (1) and the upper mold (3), a cylinder (6) is fixed to the inner wall of the through hole (5), a limit plate (7) is fixed on one end of the telescopic rod of the cylinder (6), and the limit plate (7) is in contact with the lower mold The tool (1) has an internal cavity sliding arrangement, two connecting columns (8) are fixed on one side of the limiting plate (7), the connecting columns (8) are slidingly connected to the through hole (5), a scale hole (9) is provided on the outer wall of the connecting column (8) on the lower mold (1), a positioning pin is provided in the scale hole (9), two clamping plates (10) are fixed on the top surface of the limiting plate (7) on the lower mold (1), and two clamping grooves (11) are provided on the bottom surface of the limiting plate (7) on the upper mold (3), and the clamping plates (10) are clamped with the clamping grooves (11).

2. The injection mold with adjustable cavity size according to claim 1, characterized in that: The top surface of the clamping plate (10) is provided with a curved surface.

3. The injection mold with adjustable cavity size according to claim 1, characterized in that: A mounting frame (12) is fixed on the top surface of the placement plate (2), and a driving member (13) is fixed on the mounting frame (12).

4. The injection mold with adjustable cavity size according to claim 3, characterized in that: A support frame (14) is fixed to the bottom surface of the driving member (13), and the support frame (14) corresponds to the pouring port.

5. The injection mold with adjustable cavity size according to claim 1, characterized in that: Limiting holes (15) are provided at the four corners of the top surface of the upper mold (3), and limiting columns (16) are fixed at the four corners of the top surface of the lower mold (1), and the limiting columns (16) are slidably connected to the limiting holes (15).

6. The injection mold with adjustable cavity size according to claim 5, characterized in that: A sealing gasket (17) is fixed to the top surface of the lower mold (1), and the top surface of the sealing gasket (17) is in contact with the bottom surface of the upper mold (3).

7. The injection mold with adjustable cavity size according to claim 6, characterized in that: The front and rear sides of the lower mold (1) and the upper mold (3) are both provided with mounting grooves (18), and a cooling module (19) is fixed to the inner wall of the mounting groove (18).

Images