Sealing gasket injection mold convenient to demold

Abstract

The sealing gasket injection mold comprises a lower mold base, a plurality of guide rails are arranged on the upper surface of the lower mold base, an upper mold base is connected to the outer surfaces of the guide rails in a sliding mode, a female mold is arranged on the upper surface of the lower mold base, and a corresponding male mold is arranged on the lower surface of the upper mold base. The female die and the male die are combined to form an injection molding cavity, an injection molding opening is formed in the upper surface of the upper die base in a penetrating mode, a protruding block is arranged on the upper surface of the lower die base, and a groove clamped with the protruding block is formed in the corresponding position of the lower surface of the lower die base. According to the sealing gasket injection mold convenient to demold, a first cylinder is arranged in a lower mold base, an ejector block is arranged in the first cylinder and penetrates through the lower surface of a female mold, an air pipe is arranged below the cylinder and connected with a second cylinder on the side surface of the device, the second cylinder drives the ejector block in the first cylinder to move under the action on air, and therefore a finished product in the female mold is demolded.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a sealing gasket injection mold which is easy to demould. Background Art

[0002] A gasket is a sealing part used in places with fluids such as machinery, equipment, and pipelines. It is used inside and outside to seal. Most gaskets are made of elastic materials such as rubber and are made through cutting, stamping or tailoring. Injection molds are tools for producing plastic products. The heated and melted plastic is injected into the mold cavity under high pressure by the injection molding machine. After cooling and solidification, a molded product is obtained.

[0003] After the injection mold is formed, it will be bonded to the template and needs to be demolded to obtain the finished product. However, the lower mold of the current injection mold is mostly concave and the upper mold is convex. After the upper and lower molds are combined for injection and cooling, the finished product will be in the groove of the lower mold, which makes it difficult to demold the finished product from the mold. Utility Model Content

[0004] The utility model aims to provide a sealing gasket injection mold which is easy to demould. The device sets a moving top block in the concave mold, uses air pressure to push the top block to move and push the molded sealing gasket upward to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sealing gasket injection mold that is easy to demold, comprising a lower mold base, the upper surface of the lower mold base is provided with a plurality of guide rails, the outer surface of the guide rails is slidably connected with an upper mold base, the upper surface of the lower mold base is provided with a concave mold, the lower surface of the upper mold base is provided with a corresponding convex mold, the concave mold and the convex mold are combined into a completed injection cavity, the upper surface of the upper mold base is provided with an injection port, the upper surface of the lower mold base is provided with a convex block, the lower surface of the lower mold base is provided with a groove that engages with the convex block at a corresponding position, the lower surface of the concave mold is provided with an ejection structure, and the ejection structure uses the ejection block to eject the molded sealing gasket.

[0006] Preferably, the ejection structure includes a cylinder 1, which is an open hollow structure, and the upper surface of the cylinder 1 passes through the lower surface of the die, and a ejection block is slidably mounted on the inner wall of the cylinder 1, the cross-section of the ejection block is an inverted convex shape, a protrusion is provided on the inner wall of the cylinder 1 to fit the surface of the ejection block, the surface of the ejection block completely covers the opening of the cylinder 1, and a telescopic rod is symmetrically provided on the lower surface of the ejection block, the other end of the telescopic rod is fixed to the inner wall of the cylinder 1, and a spring is provided on the outer surface of the telescopic rod, one end of the spring is fixed to the lower surface of the ejection block, and the other end of the spring is fixed to the inner wall of the cylinder 1.

[0007] By adopting the above technical solution, the formed sealing gasket can be pushed out upwards by utilizing the movement of the ejector block on the inner wall of the cylinder.

[0008] Preferably, a plurality of the cylinders and top blocks are distributed in an annular manner on the bottom surface of the die.

[0009] By adopting the above technical solution, multiple top blocks move synchronously so that the sealing gasket is subjected to more uniform force.

[0010] Preferably, a blowing structure is provided on the side surface of the lower mold base, and the blowing structure drives the movement of the top block by utilizing the force during the mold closing and parting process between the lower mold base and the upper mold base.

[0011] By adopting the above technical solution, the top block can be driven to move by utilizing the air blowing structure.

[0012] Preferably, the blowing structure includes two cylinders, and the two cylinders are respectively fixedly mounted on the side surfaces of the lower mold base, and the structures at the two cylinders are exactly the same. The two cylinders are cylindrical with a hollow interior. A piston is slidably arranged on the inner wall of the two cylinders, and a connecting rod is arranged on the upper surface of the piston and passes through the upper surface of the two cylinders. A rack is arranged on one side of the two cylinders, and the rack is connected to the piston. A gear is rotatably installed on the side surface of the lower mold base, and one side of the gear is meshed with the rack. The side surface of the upper mold base is connected with a rack, and the rack is meshed with the gear. A branch pipe is arranged on the side surface of the two cylinders, and a one-way valve is arranged in the branch pipe of the two cylinders, and the flow direction of the one-way valve is from the outside to the inside of the two cylinders. Another one-way valve is arranged on the lower surface of the two cylinders, and the flow direction of the one-way valve there is from the two cylinders to the outside. A conduit is arranged below the two cylinders and connected to the lower surface of the one cylinder.

[0013] By adopting the above technical solution, the movement of the upper die seat drives the movement of the second rack, thereby driving the movement of the gear and the first rack, thereby realizing the movement of the piston in the second cylinder.

[0014] Preferably, a temperature control structure is provided on the outer surfaces of the concave mold and the convex mold, and the temperature control structure is provided with a cooling pipe and a heating sleeve to achieve heating and cooling of the mold.

[0015] By adopting the above technical solution, the mold can be heated before injection molding using the temperature control structure to prevent the temperature difference between the mold and the molten plastic from being too large and affecting the quality of the finished product.

[0016] Preferably, the temperature control structure includes a cooling tube, which is annularly arranged inside the lower mold base, and the water inlet and outlet of the cooling tube are both located on the front surface of the lower mold base, an electric connector 1 is slidably arranged on the outer surface of the water inlet end of the cooling tube, the portion where the electric connector 1 contacts the cooling tube is a magnetic material, an electric connector 2 is fixedly installed on the outer surface of the cooling tube, the inner wall of the cooling tube is slidably connected to a slider, a spring is arranged on the surface of the slider and is connected to the inner wall of the cooling tube, the slider is a magnet, heating sleeves are arranged on the outer surfaces of the concave mold and the punch, the power cord of the heating sleeve is connected to the electric connector 1, and the electric connector 2 is connected to an external power supply.

[0017] By adopting the above technical solution, the heating sleeve and the cooling pipe are used to heat and cool the mold, thereby improving the quality of the finished product.

[0018] Compared with the prior art, the utility model has the following beneficial effects: the sealing gasket injection mold which is easy to demould:

[0019] 1. The device is provided with a cylinder 1 in the lower die seat, a top block is provided in the cylinder 1 and penetrates the lower surface of the die, an air pipe is provided under the cylinder and connected with the cylinder 2 on the side surface of the device, and the top block in the cylinder 1 is driven to move by the action of the cylinder 2 on the air, so as to realize demoulding of the finished product in the die;

[0020] 2. Two one-way valves are arranged on the surface of cylinder 2 of the device, and a sliding piston is arranged on the inner wall of cylinder 2. During the movement of the upper die seat, rack 2 is driven to drive the piston to move in cylinder 2, and the outside air is sent to cylinder 1 through the two one-way valves to drive the top block to move, without the need to set up another driving device;

[0021] 3. The device is provided with heating sleeves on the outer surfaces of the concave mold and the convex mold to prevent uneven injection due to the low temperature of the inner wall of the mold during the injection molding process. A cold pipe is arranged inside the lower mold base to fully cool the injection molding process, and electric connectors 1 and 2 are arranged on the outer surface of the water inlet of the cooling pipe to connect with the power line of the heating sleeve, so that the heating sleeve and the cooling pipe cannot be turned on at the same time, thereby achieving the effect of saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the front section structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the connection structure between the concave mold and the convex mold of the utility model;

[0025] Figure 4 This is a schematic diagram of the cross-sectional structure of the lower die base and the concave die of the utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the second cylinder and the second rack of the utility model;

[0027] Figure 6 This is a schematic diagram of the cooling tube and slider structure of the utility model.

[0028] In the figure: 1. lower die base; 2. guide rail; 3. upper die base; 4. die; 5. punch; 6. bump; 7. cylinder 1; 8. top block; 9. telescopic rod; 10. spring; 11. cylinder 2; 12. piston; 13. rack 1; 14. gear; 15. rack 2; 16. one-way valve; 17. cooling pipe; 18. electrical connector 1; 19. electrical connector 2; 20. slider; 21. heating sleeve. DETAILED DESCRIPTION

[0029] 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.

[0030] See also Figure 1-6 The utility model provides a technical solution: a sealing gasket injection mold that is easy to demould, including a lower mold base 1, a guide rail 2, an upper mold base 3, a die 4, a punch 5, a convex block 6, a cylinder 7, a top block 8, a telescopic rod 9, a spring 10, a cylinder 11, a piston 12, a rack 13, a gear 14, a rack 15, a one-way valve 16, a cooling pipe 17, an electric connector 18, an electric connector 2 19, a slider 20, and a heating sleeve 21.

[0031] The device has the effect of facilitating demoulding, specifically:

[0032] The upper surface of the lower mold base 1 is provided with a plurality of guide rails 2, the outer surface of the guide rails 2 is slidably connected with the upper mold base 3, the upper surface of the lower mold base 1 is provided with a die 4, the lower surface of the upper mold base 3 is provided with a corresponding convex mold 5, the die 4 and the convex mold 5 are combined into a completed injection cavity, the upper surface of the upper mold base 3 is provided with an injection port, the upper surface of the lower mold base 1 is provided with a convex block 6, the lower surface of the lower mold base 1 is provided with a groove engaged with the convex block 6 at a corresponding position, the lower surface of the lower mold base 1 is provided with an ejection structure, the ejection structure uses the ejection block 8 to eject the molded sealing gasket, and the ejection structure includes a cylinder 7, a cylinder 8, and a cylinder 9. 7 is an open hollow structure, and the upper surface of the cylinder 7 penetrates the lower surface of the die 4, and a top block 8 is slidably installed on the inner wall of the cylinder 7. The cross section of the top block 8 is an inverted convex shape. The inner wall of the cylinder 7 is provided with a protrusion that fits the surface of the top block 8. The surface of the top block 8 completely covers the opening of the cylinder 7. The lower surface of the top block 8 is symmetrically provided with a telescopic rod 9, and the other end of the telescopic rod 9 is fixed to the inner wall of the cylinder 7. The outer surface of the telescopic rod 9 is provided with a spring 10, one end of the spring 10 is fixed to the lower surface of the top block 8, and the other end of the spring 10 is fixed to the inner wall of the cylinder 7. Multiple cylinders 7 The top block 8 is annularly distributed on the bottom surface of the die 4, and a blowing structure is arranged on the side surface of the lower die base 1. The blowing structure drives the movement of the top block 8 by using the force in the process of mold closing and mold separation between the lower die base 1 and the upper die base 3. The blowing structure includes a cylinder 11. The two cylinders 11 are respectively fixedly installed on the side surfaces of the lower die base 1, and the structures at the cylinders 11 are exactly the same. The cylinder 11 is a hollow cylinder. A piston 12 is slidably arranged on the inner wall of the cylinder 11. A connecting rod is arranged on the upper surface of the piston 12 to penetrate the upper surface of the cylinder 11. A rack 13 is arranged on one side of the cylinder 11, and the rack 11 3 is connected to the piston 12, a gear 14 is rotatably installed on the side surface of the lower die base 1, one side of the gear 14 is meshed with the rack 1 13, a rack 2 15 is connected to the side surface of the upper die base 3, the rack 2 15 is meshed with the gear 14, a branch pipe is arranged on the side surface of the cylinder 2 11, a one-way valve 16 is arranged in the branch pipe of the cylinder 2 11, and the flow direction of the one-way valve 16 is from the outside to the inside of the cylinder 2 11, another one-way valve 16 is arranged on the lower surface of the cylinder 2 11, and the flow direction of the one-way valve 16 is from the cylinder 2 11 to the outside, and a conduit is arranged below the cylinder 2 11 to connect with the lower surface of the cylinder 1 7;

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, when the upper mold base 3 is in use, an external driving device such as a cylinder and a hydraulic cylinder is connected. The upper mold base 3 slides downward on the surface of the guide rail 2, and the upper mold base 3 drives the punch 5 downward to close the mold with the die 4 on the surface of the lower mold base 1. At the same time, the convex block 6 on the upper surface of the lower mold base 1 is engaged with the groove on the surface of the upper mold base 3, and the die 4 and the punch 5 are tightly connected. At this time, the pouring port on the surface of the upper mold base 3 can be used for injection molding. When the upper mold base 3 moves downward, the upper mold base 3 drives the rack 2 15 to move downward. The downward movement of the rack 2 15 drives the gear 14 to rotate counterclockwise. The counterclockwise rotation of the gear 14 drives the rack 1 13 on the other side to move upward. The upward movement of the rack 13 drives the piston 12 to slide upward on the inner wall of the cylinder 2 11. The piston 12 slides upward on the inner wall of the cylinder 2 11 to remove the outside air from the cylinder 2 1 The one-way valve 16 on the side surface of 1 is drawn into the interior of the cylinder 2 11. When the sealing gasket is formed, the upper die seat 3 moves upward to drive the punch 5 and the die 4 to separate and demould. At this time, the upper die seat 3 moves upward, and the upper die seat 3 moves upward to drive the rack 2 15 to move upward. The rack 2 15 moves upward to drive the gear 14 to rotate clockwise. The gear 14 rotates clockwise to drive the rack 1 13 to move downward. The rack 13 moves downward to drive the piston 12 to move downward, so that the air in the cylinder 2 11 moves from the one-way valve 16 below through the conduit to the cylinder 1 7, pushing the top block 8 to move upward to push out the finished product. The top block 8 moves upward to drive the telescopic rod 9 to extend, and at the same time drives the spring 10 to stretch. After the top block 8 pushes the finished product upward, it rebounds under the action of the spring 10 and returns to its original position until it is pushed by air next time.

[0034] This device has the effect of adjusting the mold temperature to facilitate cooling, specifically:

[0035] A temperature control structure is arranged on the outer surface of the die 4 and the punch 5. The temperature control structure is provided with a cooling pipe 17 and a heating sleeve 21 to realize heating and cooling of the mold. The temperature control structure includes a cooling pipe 17. The cooling pipe 17 is arranged in an annular manner inside the lower die base 1, and the water inlet and the water outlet of the cooling pipe 17 are both located on the front surface of the lower die base 1. An electric contact piece 18 is slidably arranged on the outer surface of the water inlet end of the cooling pipe 17. The portion where the electric contact piece 18 contacts the cooling pipe 17 is a magnetic material. An electric contact piece 2 19 is fixedly installed on the outer surface of the cooling pipe 17. The inner wall of the cooling pipe 17 is slidably connected to a slider 20. A spring 10 is arranged on the surface of the slider 20 to be connected to the inner wall of the cooling pipe 17. The slider 20 is a magnet. A heating sleeve 21 is arranged on the outer surface of the die 4 and the punch 5. The power line of the heating sleeve 21 is connected to the electric contact piece 18, and the electric contact piece 2 19 is connected to an external power supply.

[0036] like Figure 1 , Figure 2 , Figure 3 and Figure 6As shown, before injection molding, the heating sleeve 21 is started to heat the mold to prevent quality problems of the finished product caused by excessive temperature difference between the mold surface and the plastic. After injection molding starts, cooling water is introduced into the cooling tube 17 to cool the plastic to increase the molding speed of the finished product. When the water flows in the cooling tube 17, the water pushes the slider 20 to slide on the inner wall of the cooling tube 17 and compresses the spring 10. The slider 20 drives the electric contact piece 1 18 to slide and separate from the electric contact piece 2 19, so that the power supply of the heating sleeve 21 is disconnected. Therefore, while the mold is being cooled, the heating sleeve 21 cannot be started, thereby avoiding energy waste. When the water flow in the cooling tube 17 stops, the slider 20 rebounds under the action of the spring 10, so that the electric contact piece 1 18 and the electric contact piece 2 19 are re-contacted, so that the power supply of the heating sleeve 21 is re-connected.

[0037] Working principle: when using the sealing gasket injection mold that is easy to demold, the upper mold base 3 moves to close and separate the die 4 and the punch 5, which will drive the rack 2 15 to move, and the rack 2 15 drives the gear 14 to rotate, thereby driving the piston 12 to move in the cylinder 2 11. The piston 12 drives the air to move in the cylinder 2 11, so that the air moves into the cylinder 1 7 through the conduit, and pushes the top block 8 to move upward to demold the finished product. A heating sleeve 21 is arranged on the outer surface of the die 4 and the punch 5 to prevent uneven injection due to the low temperature of the inner wall of the mold during the injection molding process. The cooling pipe 17 is used to fully cool the injection molding process. An electric connector 18 and an electric connector 2 19 are arranged on the outer surface of the water inlet of the cooling pipe 17. The electric connector 18 and the electric connector 2 19 are connected to the power line of the heating sleeve 21, so as to realize the power connection and disconnection of the heating sleeve 21, and control the heating sleeve 21 and the cooling pipe 17 to be unable to be turned on at the same time, so as to achieve the effect of energy saving and increase the overall practicality.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing gasket injection mold for easy demoulding, comprising a lower mold base (1), the upper surface of the lower mold base (1) is provided with a plurality of guide rails (2), the outer surface of the guide rails (2) is slidably connected with an upper mold base (3), the upper surface of the lower mold base (1) is provided with a concave mold (4), the lower surface of the upper mold base (3) is provided with a corresponding convex mold (5), the concave mold (4) and the convex mold (5) are combined to form a completed injection cavity, the upper surface of the upper mold base (3) is provided with an injection port, the upper surface of the lower mold base (1) is provided with a convex block (6), and the lower surface of the lower mold base (1) is provided with a groove engaging with the convex block (6) at a corresponding position, characterized in that: An ejection structure is arranged on the lower surface of the concave mold (4), and the ejection structure utilizes an ejection block (8) to eject the molded sealing gasket from the mold.

2. The sealing gasket injection mold that is easy to demould according to claim 1, characterized in that: The ejection structure comprises a cylinder (7), wherein the cylinder (7) is an open hollow structure, and the upper surface of the cylinder (7) penetrates the lower surface of the die (4); a ejection block (8) is slidably mounted on the inner wall of the cylinder (7); the cross section of the ejection block (8) is an inverted convex shape; a protrusion is arranged on the inner wall of the cylinder (7) and fits with the surface of the ejection block (8); the surface of the ejection block (8) completely covers the opening of the cylinder (7); a telescopic rod (9) is symmetrically arranged on the lower surface of the ejection block (8); the other end of the telescopic rod (9) is fixed to the inner wall of the cylinder (7); a spring (10) is arranged on the outer surface of the telescopic rod (9); one end of the spring (10) is fixed to the lower surface of the ejection block (8), and the other end of the spring (10) is fixed to the inner wall of the cylinder (7).

3. The sealing gasket injection mold that is easy to demould according to claim 2, characterized in that: A plurality of cylinders (7) and top blocks (8) are distributed in an annular shape on the bottom surface of the die (4).

4. The sealing gasket injection mold that is easy to demould according to claim 1, characterized in that: A blowing structure is arranged on the side surface of the lower mold base (1), and the blowing structure drives the movement of the top block (8) by utilizing the force during the mold closing and parting process of the lower mold base (1) and the upper mold base (3).

5. The sealing gasket injection mold that is easy to demould according to claim 4, characterized in that: The blowing structure comprises a second cylinder (11), wherein the two second cylinders (11) are respectively fixedly mounted on the side surface of the lower die seat (1), and the structures of the second cylinders (11) are completely the same, the second cylinder (11) is a hollow cylinder, a piston (12) is slidably mounted on the inner wall of the second cylinder (11), a connecting rod is mounted on the upper surface of the piston (12) and penetrates the upper surface of the second cylinder (11), a rack (13) is mounted on one side of the second cylinder (11), and the rack (13) is connected to the piston (12), a gear (14) is rotatably mounted on the side surface of the lower die seat (1), and the gear (14) is One side is meshed with rack one (13), the side surface of the upper mold base (3) is connected with rack two (15), the rack two (15) is meshed with gear (14), a branch pipe is arranged on the side surface of the cylinder two (11), a one-way valve (16) is arranged in the branch pipe of the cylinder two (11), and the flow direction of the one-way valve (16) is from the outside to the inside of the cylinder two (11), another one-way valve (16) is arranged on the lower surface of the cylinder two (11), and the flow direction of the one-way valve (16) is from the cylinder two (11) to the outside, and a conduit is arranged below the cylinder two (11) and connected to the lower surface of the cylinder one (7).

6. The sealing gasket injection mold that is easy to demould according to claim 1, characterized in that: The outer surfaces of the concave mold (4) and the convex mold (5) are provided with a temperature control structure, and the temperature control structure is provided with a cooling pipe (17) and a heating sleeve (21) to achieve heating and cooling of the mold.

7. The sealing gasket injection mold that is easy to demould according to claim 6, characterized in that: The temperature control structure comprises a cooling pipe (17), the cooling pipe (17) is arranged in an annular manner inside the lower die base (1), and the water inlet and the water outlet of the cooling pipe (17) are both located on the front surface of the lower die base (1); an electric contact piece (18) is slidably arranged on the outer surface of the water inlet end of the cooling pipe (17); the portion where the electric contact piece (18) contacts the cooling pipe (17) is made of magnetic material; an electric contact piece (19) is fixedly installed on the outer surface of the cooling pipe (17); the inner wall of the cooling pipe (17) is slidably connected to a slider (20); a spring (10) is arranged on the surface of the slider (20) and connected to the inner wall of the cooling pipe (17); the slider (20) is a magnet; heating sleeves (21) are arranged on the outer surfaces of the concave mold (4) and the convex mold (5); the power line of the heating sleeve (21) is connected to the electric contact piece (18), and the electric contact piece (19) is connected to an external power supply.

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