Injection mold convenient to demold

Abstract

The utility model belongs to the technical field of injection molds, and particularly relates to an injection mold convenient for demolding, which comprises a base, an installation hole is formed in the base, an injection molding pipe is fixedly installed in the installation hole, sliding grooves are formed in the four corners of the inner side of the base, sliding rods are installed in the sliding grooves in a sliding mode, the other ends of the sliding rods are fixedly connected with a female die, first springs are arranged between the female die and the base and arranged on the sliding rods in a sleeving mode, and a forming hole is formed in the surface of one side of the female die. A sealing block is fixedly installed on the other side of the female die, a sliding hole is formed in the sealing block, a sliding block is arranged in the sliding hole in a sliding mode, the sliding block is fixedly installed on the injection molding pipe, a feeding hole is formed in the sliding block and communicates with the injection molding pipe, and a movable die is fixedly installed on the inner side of the second positioning plate; a male die is fixedly installed on one side of the fixing plate through a fixing block, and a die frame is arranged at the other end of the male die in a sliding mode. Through the arrangement, demolding is completed in the mold separation process.

Description

Technical Field

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

[0002] Injection molds can be divided into two categories according to their molding characteristics: thermosetting plastic molds and thermoplastic plastic molds. According to the molding process, they can be divided into transfer molds, blow molds, casting molds, thermoforming molds, hot pressing molds and injection molds.

[0003] The working principle of injection mold is to fill the molten plastic into the mold, cool and solidify it, and finally form the desired plastic product. This process has high production efficiency and low cost, and is widely used in the production of plastic products.

[0004] The existing injection mold needs to start the equipment again for demoulding after injection is completed. The work process is not coherent enough, and the demoulding work cannot be completed when the molds are separated, which reduces the production efficiency of the injection mold. Therefore, an injection mold that is easy to demould is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the shortcomings of the prior art, the existing injection mold needs to start the equipment again for demolding when the injection is completed. The work flow is not coherent enough, and the demolding work cannot be completed when the molds are separated, which reduces the production efficiency of the injection mold. The utility model proposes an injection mold that is easy to demold.

[0006] The technical solution adopted by the utility model to solve its technical problems is: the utility model is an injection mold that is easy to demould, comprising a base; support plates are fixedly installed at both ends of the upper part of the base, an injection hole is opened on the outer side of one of the support plates, guide rods are arranged at four corners between the support plates, both ends of the guide rods are fixedly connected to the inner side of the support plate, a first positioning plate and a second positioning plate are respectively arranged at both ends of the guide rod, the No. 1 positioning plate is fixedly installed on the inner side of the support plate with the injection hole, a fixed mold is fixedly installed on the inner side of the No. 1 positioning plate, the fixed mold comprises a base, a mounting hole is opened in the base, an injection tube is fixedly installed in the mounting hole, a slide groove is opened at the four corners of the inner side of the base, a slide rod is slidably installed in the slide groove, and the other end of the slide rod is fixedly connected with A concave mold, a No. 1 spring is arranged between the concave mold and the base and is sleeved on the sliding rod. A molding hole is opened on the surface of one side of the concave mold, and a sealing block is fixedly installed on the other side of the concave mold. A sliding hole is opened in the sealing block, and a sliding block is slidably arranged in the sliding hole. The sliding block is fixedly installed on the injection tube, and a feeding hole is opened in the sliding block and is connected with the injection tube. A movable mold is fixedly installed on the inner side of the No. 2 positioning plate, and the movable mold includes a mold base, connecting plates are fixedly connected on both sides of the mold base, and fixed plates are fixedly installed at both ends of the connecting plates. A punch is fixedly installed on one side of the fixed plate through a fixed block, and a mold frame is slidably arranged on the other end of the punch. When the concave mold is separated from the punch, the concave mold and the sliding block are separated to separate the injection molded product in the concave mold, and the mold frame pushes the injection molded product to separate from the punch.

[0007] Preferably, an annular cooling groove is provided on the other side of the die, a T-shaped air inlet hole is provided on the upper part of the sealing block near the die, one end of the T-shaped air inlet hole is connected to the sliding hole, and the other end is connected to the annular cooling groove, an L-shaped exhaust hole is provided at the bottom of the sealing block, one end of the L-shaped exhaust hole is connected to the annular cooling groove, and the air inlet hole is connected to the refrigerator through a connecting pipe, so as to cool the mold cavity during injection molding and accelerate the cooling of the mold, and to cool the inside of the die when the slide block is separated from the die, so as to reduce the cooling time of the mold.

[0008] Preferably, a mounting plate is provided between the mold base and the fixed plate, and stepped holes are provided at the four corners of the fixed block away from the fixed plate. A limit rod is slidably installed in the stepped hole, and a No. 2 spring is slidably provided in the stepped hole and sleeved on the limit rod. One end of the limit rod passes through the fixed block, and the other end is slidably installed on the fixed plate and passed through the fixed plate and fixedly connected to the mounting plate. The mold frame is fixedly installed on the limit rod, and the limit rod passes through the mold frame. After injection molding, the mold frame is driven by the No. 2 spring to separate the punch from the injection molded product.

[0009] Preferably, a sliding hole is opened in the center of the fixed plate and the punch, and the sliding holes are connected. An ejector is slidably installed in the sliding hole. Both ends of the ejector pass through the fixed plate and the punch respectively, and one end of the ejector is fixedly installed on the mounting plate. The ejector cooperates with the mold frame to demould the injection molded product to ensure the integrity of the product.

[0010] Preferably, limiting grooves are provided on four corners of the opposite side of the concave mold and the punch, and the position of the limiting grooves corresponds to the limiting rod, so that the mold clamping accuracy is ensured by the cooperation between the limiting rod and the limiting grooves.

[0011] Preferably, a hydraulic cylinder is fixedly installed on the outer side of the support plate on one side of the male mold, and the front end of the piston rod of the hydraulic cylinder is fixedly connected to the second positioning plate, so that the mold can be quickly closed and separated by the hydraulic cylinder.

[0012] The utility model is beneficial in that:

[0013] 1. The utility model uses an injection mold to perform injection molding on the mold after the mold is closed by an injection molding machine, and then starts the hydraulic cylinder to pull the No. 2 positioning plate to drive the movable mold to move to the other end of the base. The No. 2 positioning plate pulls the movable mold backward through the mold base. At this time, the No. 1 spring and the No. 2 spring both begin to stretch, and the No. 1 spring pushes the concave mold and the sealing block away from the base. At the same time, one end of the slider slides in the sealing block to expose the pores connected to the inside of the sealing block, and the cold air blows the outer surface of the product to demold the product from the concave mold. The No. 2 spring pushes the limit rod to drive the mold frame away from the fixed plate, and at the same time, the ejector pin is pushed through the mounting plate to demold the product from the convex mold. When the movable mold is separated from the fixed mold, the product falls down, and the structural design of demolding is completed, which realizes the function of automatic demolding, solves the problem that the existing injection mold needs to start the equipment again for demolding when injection molding is completed, the work flow is not coherent enough, and the demolding work cannot be completed when the molds are separated, which reduces the production efficiency of the injection mold and improves the production efficiency of the injection mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a schematic diagram of the side structure of the injection mold;

[0016] Figure 2 It is a schematic diagram of the structure of the injection mold from a top view;

[0017] Figure 3 It is a schematic diagram of the fixed mold cross-sectional structure;

[0018] Figure 4 It is a structural schematic diagram of the movable mold demoulding device;

[0019] Figure 5 It is a schematic diagram of the cross-sectional structure of the movable mold.

[0020] In the figure: 1. base; 2. support plate; 3. guide rod; 4. No. 1 positioning plate; 5. base; 6. die; 7. slide rod; 8. No. 1 spring; 9. injection tube; 10. slide block; 11. sealing block; 12. No. 2 positioning plate; 13. mold base; 14. connecting plate; 15. fixing plate; 16. fixing block; 17. punch; 18. ejector pin; 19. mounting plate; 20. limit rod; 21. mold frame; 22. No. 2 spring; 23. hydraulic cylinder. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figure 1-5As shown, an injection mold for easy demoulding includes a base 1; support plates 2 are fixedly installed at both ends of the upper part of the base 1, and an injection hole is opened on the outer side of one of the support plates 2, and guide rods 3 are arranged at the four corners between the support plates 2, and both ends of the guide rods 3 are fixedly connected to the inner side of the support plate 2, and a first positioning plate 4 and a second positioning plate 12 are respectively arranged at both ends of the guide rods 3, and the first positioning plate 4 is fixedly installed on the inner side of the support plate 2 with the injection hole, and a fixed mold is fixedly installed on the inner side of the first positioning plate 4, and the fixed mold includes a base 5, and a mounting hole is opened in the base 5, and an injection tube 9 is fixedly installed in the mounting hole. The four corners of the inner side of the base 5 are provided with slide grooves, and a slide rod 7 is slidably installed in the slide groove. The other end of the slide rod 7 is fixedly connected to a die 6. A No. 1 spring 8 is provided between the die 6 and the base 5 and is sleeved on the slide rod 7. A molding hole is provided on one side of the die 6. A sealing block 11 is fixedly installed on the other side of the die 6. A slide hole is provided in the sealing block 11. A slider 10 is slidably provided in the slide hole. The slider 10 is fixedly installed on the injection tube 9, and a feed hole is provided in the slider 10 to communicate with the injection tube 9. A movable mold is fixedly installed on the inner side of the No. 2 positioning plate 12. The movable mold includes a mold base 13. The mold Both sides of the seat 13 are fixedly connected with connecting plates 14, and both ends of the connecting plates 14 are fixedly installed with fixing plates 15. One side of the fixing plate 15 is fixedly installed with a punch 17 through a fixing block 16, and the other end of the punch 17 is slidably provided with a mold frame 21; when working, the existing injection mold needs to start the equipment again for demoulding after the injection molding is completed. The work process is not coherent enough, and the demoulding work cannot be completed when the mold is separated, which reduces the production efficiency of the injection mold. When the injection mold is used, after the mold is injection molded by the injection molding machine, the hydraulic cylinder 23 is started to pull the second positioning plate 12 with the movable mold to the base 1 and the other end move, the No. 2 positioning plate 12 pulls the movable mold backward through the mold base 13, at this time, the No. 1 spring 8 and the No. 2 spring 22 begin to stretch, the No. 1 spring 8 pushes the concave mold 6 and the sealing block 11 away from the base 5, and at the same time, one end of the slider 10 slides in the sealing block 11, so that the pores connected to the inside of the sealing block 11 are exposed, and the cold air blows the outer surface of the product to demould the product and the concave mold 6, the No. 2 spring 22 pushes the limit rod 20 to drive the mold frame 21 away from the fixed plate 15, and at the same time pushes the ejector pin 18 through the mounting plate 19 to demould the product and the convex mold 17, when the movable mold is separated from the fixed mold, the product falls, and the demoulding is completed.

[0023] An annular cooling groove is provided on the other side of the die 6, and a T-shaped air inlet hole is provided on the upper part of the sealing block 11 near the die 6, one end of the T-shaped air inlet hole is connected to the sliding hole, and the other end is connected to the annular cooling groove. An L-shaped exhaust hole is provided at the bottom of the sealing block 11, and one end of the L-shaped exhaust hole is connected to the annular cooling groove; during operation, when the injection mold is used, when the mold is in the closed state, the air inlet end of the T-shaped air inlet hole is connected to the refrigerator, and cold air enters the annular cooling groove of the die 6 to cool the product in the mold cavity and accelerate mold forming, and then is discharged through the L-shaped exhaust hole. When the mold is separated, the slider 10 exposes the other end of the T-shaped air inlet hole, and a part of the cold air enters the die 6 to cool and clean the inner wall of the die 6.

[0024] A mounting plate 19 is arranged between the mold base 13 and the fixed plate 15, and stepped holes are opened at the four corners of the fixed block 16 away from the fixed plate 15. A limit rod 20 is slidably installed in the stepped hole, and a No. 2 spring 22 is slidably arranged in the stepped hole and sleeved on the limit rod 20. One end of the limit rod 20 passes through the fixed block 16, and the other end is slidably installed on the fixed plate 15 and passes through the fixed plate 15 and is fixedly connected to the mounting plate 19. The mold frame 21 is fixedly installed on the limit rod 20, and the limit rod 20 passes through the mold frame 21; during operation, when the injection mold is used, the movable mold and the fixed mold are separated after the product is formed, and the movable mold moves backward, and the No. 2 spring 22 pushes the limit rod 20 to move the mold frame 21 to push the product on the punch 17 toward the die 6, so that the product is separated from the punch 17, and at the same time, the limit rod 20 drives the mounting plate 19 to move away from the mold base 13 toward the fixed plate 15.

[0025] The fixed plate 15 and the punch 17 are both provided with sliding holes in the center, and the sliding holes are connected. An ejector pin 18 is slidably installed in the sliding hole. The two ends of the ejector pin 18 respectively pass through the fixed plate 15 and the punch 17, and one end of the ejector pin 18 is fixedly installed on the mounting plate 19. During operation, when the injection mold is used, the mounting plate 19 drives the ejector pin 18 to move toward the die 6 in the punch 17 under the action of the No. 2 spring 22 to push the punch 17 onto the product.

[0026] The four corners of the opposite side of the die 6 and the punch 17 are provided with limiting grooves, and the position of the limiting grooves corresponds to the limiting rod 20; during operation, when the injection mold is used and the mold is closed, the front end of the limiting rod 20 slides into the upper limiting groove of the die 6, and at the same time the punch 17 moves the die 6 to form an injection molding cavity.

[0027] A hydraulic cylinder 23 is fixedly installed on the outer side of the support plate 2 on one side of the punch 17, and the front end of the piston rod of the hydraulic cylinder 23 is fixedly connected to the second positioning plate 12; during operation, when the injection mold is used, the hydraulic cylinder 23 is started to drive the second positioning plate 12 to slide on the guide rod 3, and the second positioning plate 12 drives the movable mold to move.

[0028] Working principle: when using the injection mold, after the mold is injection molded by the injection molding machine, the hydraulic cylinder 23 is started to pull the No. 2 positioning plate 12 with the movable mold to move to the other end of the base 1, and the No. 2 positioning plate 12 pulls the movable mold backward through the mold base 13. At this time, the No. 1 spring 8 and the No. 2 spring 22 both begin to stretch, and the No. 1 spring 8 pushes the die 6 and the sealing block 11 away from the base 5. At the same time, one end of the slider 10 slides in the sealing block 11 to expose the pores connected to the inside of the sealing block 11, and the cold air blows the outer surface of the product to demold the product and the die 6. The No. 2 spring 22 pushes the limit rod 20 to drive the mold frame 21 away from the fixed plate 15, and at the same time pushes the ejector pin 18 through the mounting plate 19 to demold the product and the punch 17. When the movable mold is separated from the fixed mold, the product falls and the demolding is completed.

[0029] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0030] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. An injection mold that is easy to demould, characterized in that: The invention comprises a base (1); support plates (2) are fixedly installed at both ends of the upper part of the base (1); an injection hole is provided on the outer side of one of the support plates (2); guide rods (3) are provided at four corners between the support plates (2); both ends of the guide rods (3) are fixedly connected to the inner side of the support plates (2); a first positioning plate (4) and a second positioning plate (12) are provided at both ends of the guide rods (3); the first positioning plate (4) is fixedly installed on the inner side of the support plate (2) with the injection hole; a fixed mold is fixedly installed on the inner side of the first positioning plate (4); the fixed mold comprises a base (5); a mounting hole is provided in the base (5); an injection molding tube (9) is fixedly installed in the mounting hole; slide grooves are provided at four corners of the inner side of the base (5); a slide rod (7) is slidably installed in the slide groove; the other end of the slide rod (7) is fixedly connected to a concave mold (6); the concave mold (6) ) and the base (5), a first spring (8) is provided between the first and second positioning plates (12) and is sleeved on the slide bar (7); a molding hole is provided on one side of the surface of the die (6); a sealing block (11) is fixedly installed on the other side of the die (6); a sliding hole is provided in the sealing block (11); a sliding block (10) is slidably provided in the sliding hole; the sliding block (10) is fixedly installed on the injection tube (9); a feed hole is provided in the sliding block (10) and is connected to the injection tube (9); a movable mold is fixedly installed on the inner side of the second positioning plate (12); the movable mold includes a mold base (13); connecting plates (14) are fixedly connected on both sides of the mold base (13); fixed plates (15) are fixedly installed at both ends of the connecting plates (14); a punch (17) is fixedly installed on one side of the fixed plate (15) through a fixing block (16); a mold frame (21) is slidably provided on the other end of the punch (17).

2. The injection mold for easy demoulding according to claim 1, characterized in that: An annular cooling groove is provided on the other side of the die (6); a T-shaped air inlet hole is provided on the upper portion of the sealing block (11) near the die (6); one end of the T-shaped air inlet hole is connected to the slide hole and the other end is connected to the annular cooling groove; an L-shaped exhaust hole is provided at the bottom of the sealing block (11); one end of the L-shaped exhaust hole is connected to the annular cooling groove.

3. The injection mold for easy demoulding according to claim 1, characterized in that: A mounting plate (19) is arranged between the mold base (13) and the fixed plate (15); stepped holes are formed at four corners of a side of the fixed block (16) away from the fixed plate (15); a limit rod (20) is slidably mounted in the stepped hole; and a second spring (22) is slidably mounted in the stepped hole and sleeved on the limit rod (20); one end of the limit rod (20) passes through the fixed block (16); the other end of the limit rod (20) is slidably mounted on the fixed plate (15) and passes through the fixed plate (15) to be fixedly connected to the mounting plate (19); the mold frame (21) is fixedly mounted on the limit rod (20), and the limit rod (20) passes through the mold frame (21).

4. The injection mold for easy demoulding according to claim 1, characterized in that: The fixing plate (15) and the punch (17) are both provided with sliding holes in the center, and the sliding holes are connected. An ejector pin (18) is slidably installed in the sliding hole. Both ends of the ejector pin (18) pass through the fixing plate (15) and the punch (17) respectively, and one end of the ejector pin (18) is fixedly installed on the mounting plate (19).

5. The injection mold for easy demoulding according to claim 1, characterized in that: Limiting grooves are formed at four corners of the opposite side of the concave die (6) and the convex die (17), and the positions of the limiting grooves correspond to the limiting rods (20).

6. The injection mold for easy demoulding according to claim 1, characterized in that: A hydraulic cylinder (23) is fixedly mounted on the outer side of a support plate (2) on one side of the punch (17), and a front end of a piston rod of the hydraulic cylinder (23) is fixedly connected to the second positioning plate (12).

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