Injection mold capable of preventing product deformation

Abstract

The utility model relates to the technical field of injection molds, and discloses an injection mold capable of preventing product deformation, which comprises a base, an injection molding module is arranged on the upper surface of the base, the injection molding module comprises a support rod, the bottom end of the support rod is fixedly mounted on the upper surface of the base, and the bottom end of the support rod is fixedly mounted on the base. A top plate is fixedly mounted at the top ends of the supporting rods. According to the injection mold capable of preventing the product from deforming, the softening assembly is arranged, a draught fan is started, external air can make contact with a spiral pipe when being blown into an air inlet pipe, the air makes contact with the spiral pipe so that the temperature can be increased, and finally the heated air enters a mold cavity through a one-way air valve; and meanwhile, through upward pushing of the demolding plate, the injection molding part formed in the lower mold is ejected out, so that demolding work is achieved, and the situation that defects and deformation are generated on the surface of the injection molding part due to direct demolding is avoided.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold that prevents product deformation. Background Technology

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. In injection molding, plastic is first added into the mold, and then the mold is continuously rotated along two vertical axes and heated. Under the action of gravity and heat, the plastic inside the mold is gradually and evenly coated, melted and adhered to the entire surface of the mold cavity, forming the desired shape. After cooling and solidification, the product is obtained.

[0003] According to a publicized injection mold for preventing product deformation (Announcement No.: CN215849397U), the above application achieves the function of separating the product from the moving mold by setting a first lifting plate, a connecting plate, a first spring and a first ejector pin; and achieves the function of separating the product from the fixed mold by setting a second ejector pin, a second spring, a lifting rod and a second lifting plate; and achieves the function of facilitating demolding by setting a connecting seat, a limiting block, a limiting groove and a third spring. It can effectively prevent deformation and has strong practicality.

[0004] However, in actual use, when the above-mentioned equipment is demolded, there are usually some small burrs that adhere between the product surface of the injection mold and the lower mold due to the injection molding process. If the mold is demolded directly, these small burrs will pull on the product surface of the injection mold, which will cause deformation or defects in the injection mold and affect the product quality. In view of this, we propose an injection mold to prevent product deformation. Utility Model Content

[0005] The purpose of this invention is to provide an injection mold that prevents product deformation, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an injection mold for preventing product deformation, comprising a base, an injection module disposed on the upper surface of the base, the injection module comprising a support rod, the bottom end of the support rod being fixedly installed on the upper surface of the base, a top plate being fixedly installed on the top end of the support rod, a fixed platform being fixedly installed through the outer wall of the support rod, a lower mold being fixedly installed on the upper surface of the fixed platform, an upper cylinder being fixedly installed on the upper surface of the top plate, an upper mold being fixedly installed at the output end of the upper cylinder, and a softening component being disposed above the base;

[0007] The softening component includes a lower cylinder, which is fixedly installed on the upper surface of the base. A lifting plate is fixedly installed at the output end of the lower cylinder. A fan is fixedly installed on the lower surface of the lifting plate. An air inlet pipe is fixedly installed through the inner wall of the lifting plate. A stripping template is fixedly installed at the top end of the air inlet pipe. A one-way air valve is fixedly installed on the inner wall of the stripping template. A circulation pump is fixedly installed on the lower surface of the fixed platform. A heat exchange tube and a spiral tube are fixedly connected to the output and input ends of the circulation pump.

[0008] Preferably, the bottom inner wall of the lower mold has a hole that matches the outer diameter of the air inlet pipe, and the blower is located directly below the air inlet pipe, so that when the blower is started, air can be continuously blown into the interior of the air inlet pipe. The number of one-way air valves is set in multiple sets, and the multiple sets of one-way air valves are evenly distributed at the connection between the air inlet pipe and the ejector plate, so that when the air inlet pipe is inlet, gas can be blown into the mold cavity of the lower mold through the one-way air valves.

[0009] Preferably, the bottom inner wall of the lower mold has a receiving cavity adapted to the heat exchange tube, and the heat exchange tube is frame-shaped, while the spiral tube is spirally arranged in the air inlet pipe.

[0010] Preferably, the heat exchange tube and the spiral tube are filled with heat-conducting oil.

[0011] Preferably, the intake pipe is internally provided with a striking assembly, which includes a mounting ring fixedly mounted on the inner wall of the intake pipe. A rotating rod is rotatably mounted on the inner surface of the mounting ring. An impeller is fixedly mounted through the outer wall of the rotating rod. A top rod is slidably mounted on the inner wall of the top of the rotating rod. A return spring is fixedly mounted on the outer wall of the bottom of the top rod. A connecting ring is fixedly connected to the top of the return spring. The upper surface of the connecting ring is rotatably connected to the inner wall of the top of the rotating rod. A sliding rod is slidably mounted on the inner wall of the top of the top rod. A striking ball is fixedly mounted on the top of the sliding rod. A small spring is fixedly connected between the bottom of the sliding rod and the inner wall of the top rod. A lever is fixedly mounted on the arc-shaped inner wall of the top of the rotating rod. An arc-shaped block is fixedly mounted on the arc-shaped outer wall of the bottom of the top rod.

[0012] Preferably, a rectangular strip is provided on the arc-shaped inner wall of the mounting ring located at the top of the inner wall of the air intake pipe, and a rectangular groove adapted to the rectangular strip is provided on the arc-shaped outer wall of the push rod, so that the push rod can rotate relative to the rotating rod when the rotating rod rotates, and can undergo relative displacement in the vertical direction.

[0013] Preferably, the outer surface of the lever is arc-shaped, and the arc-shaped block is thicker on the side closer to the center of the top rod and thinner on the side farther away from the center of the top rod. In the initial state, the lever and the arc-shaped block are set in the same plane. When the airflow moves in the intake pipe, the lever rotates by driving the impeller. At this time, the top rod jumps repeatedly in the vertical direction under the cooperation of the lever and the arc-shaped block.

[0014] Compared with the prior art, this utility model provides an injection mold to prevent product deformation, which has the following beneficial effects:

[0015] 1. This injection mold designed to prevent product deformation incorporates a softening component. When the fan is activated, external air is blown into the air inlet pipe, where it comes into contact with the spiral tube. The air heats up upon contact with the spiral tube, and this heated air then enters the mold cavity through a one-way valve. This heats the burrs on the edges of the injection molded part within the mold cavity, softening them. Simultaneously, the upward pushing of the ejector platen pushes the molded part out of the lower mold, thus achieving demolding and preventing defects and deformation on the surface of the injection molded part caused by direct demolding.

[0016] 2. This injection mold for preventing product deformation is equipped with a striking component. When the airflow moves in the air inlet pipe, it drives the impeller to rotate the rod. At this time, with the cooperation of the lever and the arc block, the ejector rod repeatedly bounces in the vertical direction. With the help of the small spring, the sliding rod drives the striking ball to strike upwards in an almost irregular manner, so that the demolding mold plate can generate continuous vibration during the upward movement, thereby increasing the breaking speed of burrs on the surface of the injection molded part during demolding, thus ensuring the demolding quality of the injection molded part. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0018] Figure 2 This is a cross-sectional view of the lower mold and fixing platform of this utility model;

[0019] Figure 3 This is a partial three-dimensional structural diagram of the softening component of this utility model;

[0020] Figure 4 This is a schematic cross-sectional view of the intake pipe of this utility model;

[0021] Figure 5 This is a schematic cross-sectional view of the top of the rotating rod of this utility model;

[0022] Figure 6 This is a cross-sectional view of the top rod structure of this utility model.

[0023] In the diagram: 1. Base; 2. Injection module; 21. Support rod; 22. Fixing platform; 23. Lower mold; 24. Top plate; 25. Upper cylinder; 26. Upper mold; 3. Softening component; 31. Lower cylinder; 32. Lifting plate; 33. Fan; 34. Air inlet pipe; 35. Demolding plate; 36. One-way valve; 37. Circulating pump; 38. Heat exchanger tube; 39. Spiral tube; 4. Impact component; 41. Mounting ring; 42. Rotating rod; 43. Impeller; 44. Push rod; 45. Return spring; 46. Connecting ring; 47. Slide rod; 48. Impact ball; 49. Small spring; 410. Toggle lever; 411. Arc block. Detailed Implementation

[0024] like Figures 1-6 As shown, this utility model provides a technical solution: an injection mold for preventing product deformation, including a base 1, an injection module 2 provided on the upper surface of the base 1, the injection module 2 including a support rod 21, the bottom end of the support rod 21 being fixedly installed on the upper surface of the base 1, the top end of the support rod 21 being fixedly installed on a top plate 24, a fixed platform 22 being fixedly installed through the outer wall of the support rod 21, a lower mold 23 being fixedly installed on the upper surface of the fixed platform 22, an upper cylinder 25 being fixedly installed on the upper surface of the top plate 24, an upper mold 26 being fixedly installed at the output end of the upper cylinder 25, and a softening component 3 provided above the base 1, the softening component 3 including a lower cylinder 31, a lifting plate 32, a fan 33, an air inlet pipe 34, a template release 35, a one-way air valve 36, a circulating pump 37, and a heat exchange pipe 38 and a spiral pipe 39.

[0025] In one embodiment of this utility model, a lower cylinder 31 is fixedly installed on the upper surface of the base 1. A lifting plate 32 is fixedly installed at the output end of the lower cylinder 31. A fan 33 is fixedly installed on the lower surface of the lifting plate 32. An air inlet pipe 34 is fixedly installed through the inner wall of the lifting plate 32. A demolding template 35 is fixedly installed at the top end of the air inlet pipe 34. A one-way air valve 36 is fixedly installed on the inner wall of the demolding template 35. A circulation pump 37 is fixedly installed on the lower surface of the fixed platform 22. A heat exchange tube 38 and a spiral tube 39 are fixedly connected to the output end and the input end of the circulation pump 37.

[0026] Furthermore, two sets of upper cylinders 25 are provided, and a column is provided between the fixed platform 22 and the top plate 24. The side wall of the upper mold 26 is provided with connecting ears that penetrate through the column and are slidably connected. Under the control of the upper cylinders 25, the upper mold 26 can move stably in the vertical direction, thereby cooperating with the lower mold 23 to close and open the mold. At the same time, the bottom inner wall of the lower mold 23 is provided with a hole that matches the outer diameter of the air inlet pipe 34, and the blower 33 is located directly below the air inlet pipe 34. When the blower 33 is started, it can continuously blow air into the interior of the air inlet pipe 34. Specifically, multiple sets of one-way air valves 36 are provided, and the multiple sets of one-way air valves 36 are evenly distributed at the connection between the air inlet pipe 34 and the demolding plate 35. This allows the air inlet pipe 34 to blow air into the mold cavity of the lower mold 23 through the one-way air valves 36 when air is introduced, thereby promoting the demolding of the injected plastic in the mold cavity.

[0027] In addition, the bottom inner wall of the lower mold 23 is provided with a receiving cavity adapted to the heat exchange tube 38, and the heat exchange tube 38 is frame-shaped. Meanwhile, the spiral tube 39 is spirally arranged within the air inlet pipe 34, so that when the fan 33 starts, external air blown into the air inlet pipe 34 can contact the spiral tube 39. Specifically, the heat exchange tube 38 and the spiral tube 39 are filled with heat-conducting oil. After the upper mold 26 and the lower mold 23 are closed, during injection molding, the heat in the mold cavity is assisted in heat dissipation through the continuously flowing heat-conducting oil in conjunction with the heat exchange tube 38 and the spiral tube 39. However, the heat-conducting oil itself... It also generates a certain amount of heat. When demolding is required, the lower cylinder 31 is activated to control the lifting plate 32 to move upward. At the same time, the fan 33 is activated to allow air from the external environment to enter the air inlet pipe 34. The air comes into contact with the spiral pipe 39 and thus heats up. Finally, this heated air enters the mold cavity through the one-way air valve 36, thereby heating the burrs at the edge of the injection molded part in the mold cavity and causing them to soften. At the same time, the upward pushing of the demolding plate 35 pushes the injection molded part formed in the lower mold 23 out, thereby realizing the demolding work and avoiding the situation where direct demolding causes defects and deformation on the surface of the injection molded part.

[0028] Please refer to the attached instruction manual. Figures 4-6The intake pipe 34 is equipped with a striking assembly 4, which includes a mounting ring 41. The mounting ring 41 is fixedly installed on the inner wall of the intake pipe 34. A rotating rod 42 is rotatably mounted on the inner surface of the mounting ring 41. An impeller 43 is fixedly mounted through the outer wall of the rotating rod 42. A push rod 44 is slidably mounted on the inner wall of the top end of the rotating rod 42. A return spring 45 is fixedly mounted on the outer wall of the bottom end of the push rod 44. A connecting ring 46 is fixedly connected to the top end of the return spring 45. The upper surface of the connecting ring 46 is rotatably connected to the inner wall of the top end of the rotating rod 42. A sliding rod 47 is slidably mounted on the inner wall of the top end of the push rod 44. A striking ball 48 is fixedly mounted on the top end of the sliding rod 47. A small spring 49 is fixedly connected between the bottom end of the sliding rod 47 and the inner wall of the push rod 44. A lever 410 is fixedly mounted on the arc-shaped inner wall of the top end of the rotating rod 42. An arc-shaped block 411 is fixedly mounted on the arc-shaped outer wall of the bottom end of the push rod 44.

[0029] In this embodiment of the invention, two sets of mounting rings 41 are provided, and the two sets of mounting rings 41 are mirror images of each other on the inner walls of the upper and lower ends of the intake pipe 34 to ensure the vertical installation of the rotating rod 42 inside the intake pipe 34. Simultaneously, a return spring 45 is sleeved on the outer side of the top rod 44 and is rotatably connected to the inner wall of the top end of the rotating rod 42 via a connecting ring 46. This allows the return spring 45 to cause the top rod 44 to vibrate repeatedly as it moves up and down inside the rotating rod 42. Furthermore, a rectangular strip is provided on the arc-shaped inner wall of the mounting ring 41 at the top of the inner wall of the intake pipe 34, and a rectangular groove matching the rectangular strip is provided on the arc-shaped outer wall of the top rod 44, allowing the top rod 44 to rotate relative to the rotating rod 42 when the rotating rod 42 rotates. Relative displacement can occur in the vertical direction. Specifically, the outer surface of the lever 410 is set in an arc shape, and the arc block 411 is set with a thicker side near the center of the ejector rod 44 and a thinner side away from the center of the ejector rod 44. In the initial state, the lever 410 and the arc block 411 are set in the same plane. When the airflow moves in the air inlet pipe 34, it drives the impeller 43 to rotate the rotating rod 42. At this time, with the cooperation of the lever 410 and the arc block 411, the ejector rod 44 repeatedly jumps in the vertical direction. With the setting of the small spring 49, the slide rod 47 drives the striking ball 48 to strike upwards in an almost irregular manner, so that the demolding mold 35 can generate continuous vibration during the upward movement, thereby increasing the breaking speed of the burrs on the surface of the injection molded part during demolding, thus ensuring the demolding quality of the injection molded part.

[0030] In this invention, during use, the upper cylinder 25 is controlled to drive the upper mold 26 downward, thereby closing with the lower mold 23. At this time, injection molding is performed into the cavity formed by the upper mold 26 and the lower mold 23 through the injection port. After injection molding is completed, the circulating pump 37 is started, working in conjunction with the heat exchange pipe 38 and the spiral pipe 39, to allow the heat-conducting oil flowing inside to carry away the heat from the lower mold 23, thus promoting rapid cooling of the cavity. Then, the upper cylinder 25 is started to drive the upper mold 26 upward, causing the upper mold 26 to disengage from the lower mold 23. At this point, the lower cylinder is controlled... 31 is activated to move the lifting plate 32 upward. At the same time, the fan 33 is activated, and external air is blown into the air inlet pipe 34 to come into contact with the spiral tube 39. The air heats up upon contact with the spiral tube 39. Finally, this heated air enters the mold cavity through the one-way air valve 36, thereby heating and softening the burrs at the edge of the injection molded part in the mold cavity. At the same time, the upward pushing of the ejector plate 35 pushes the injection molded part formed in the lower mold 23 out, thereby realizing the demolding work and avoiding defects and deformation on the surface of the injection molded part caused by direct demolding.

[0031] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. An injection mold for preventing product deformation, comprising a base (1), wherein an injection module (2) is disposed on the upper surface of the base (1), the injection module (2) includes a support rod (21), the bottom end of the support rod (21) is fixedly installed on the upper surface of the base (1), a top plate (24) is fixedly installed on the top end of the support rod (21), a fixed platform (22) is fixedly installed through the outer wall of the support rod (21), a lower mold (23) is fixedly installed on the upper surface of the fixed platform (22), an upper cylinder (25) is fixedly installed on the upper surface of the top plate (24), and an upper mold (26) is fixedly installed at the output end of the upper cylinder (25), characterized in that: A softening component (3) is provided above the base (1); The softening component (3) includes a lower cylinder (31), which is fixedly installed on the upper surface of the base (1). A lifting plate (32) is fixedly installed at the output end of the lower cylinder (31). A fan (33) is fixedly installed on the lower surface of the lifting plate (32). An air inlet pipe (34) is fixedly installed through the inner wall of the lifting plate (32). A stripping template (35) is fixedly installed at the top end of the air inlet pipe (34). A one-way air valve (36) is fixedly installed on the inner wall of the stripping template (35). A circulation pump (37) is fixedly installed on the lower surface of the fixed platform (22). A heat exchange tube (38) and a spiral tube (39) are fixedly connected at the output and input ends of the circulation pump (37).

2. The injection mold for preventing product deformation according to claim 1, characterized in that: The bottom inner wall of the lower mold (23) is provided with a hole that matches the outer diameter of the air inlet pipe (34), and the fan (33) is located directly below the air inlet pipe (34), so that when the fan (33) is started, air can be continuously blown into the interior of the air inlet pipe (34). The number of one-way air valves (36) is provided in multiple sets, and the multiple sets of one-way air valves (36) are evenly distributed at the connection between the air inlet pipe (34) and the stripping plate (35).

3. The injection mold for preventing product deformation according to claim 1, characterized in that: The bottom inner wall of the lower mold (23) is provided with a receiving cavity that is compatible with the heat exchange tube (38), and the heat exchange tube (38) is frame-shaped, while the spiral tube (39) is spirally arranged in the air inlet pipe (34).

4. The injection mold for preventing product deformation according to claim 1, characterized in that: The heat exchange tube (38) and the spiral tube (39) are filled with heat-conducting oil.

5. The injection mold for preventing product deformation according to claim 1, characterized in that: The intake pipe (34) is equipped with a striking assembly (4). The striking assembly (4) includes a mounting ring (41), which is fixedly mounted on the inner wall of the intake pipe (34). A rotating rod (42) is rotatably mounted on the inner surface of the mounting ring (41). An impeller (43) is fixedly mounted through the outer wall of the rotating rod (42). A push rod (44) is slidably mounted on the inner wall of the top end of the rotating rod (42). A return spring (45) is fixedly mounted on the outer wall of the bottom end of the push rod (44). The top end of the return spring (45) is... A connecting ring (46) is fixedly connected, and the upper surface of the connecting ring (46) is rotatably connected to the top inner wall of the rotating rod (42). A sliding rod (47) is slidably installed on the top inner wall of the top rod (44). A striking ball (48) is fixedly installed at the top of the sliding rod (47). A small spring (49) is fixedly connected between the bottom end of the sliding rod (47) and the inner wall of the top rod (44). A lever (410) is fixedly installed on the arc-shaped inner wall at the top of the shrinking rotating rod (42). An arc-shaped block (411) is fixedly installed on the arc-shaped outer wall at the bottom end of the top rod (44).

6. The injection mold for preventing product deformation according to claim 5, characterized in that: A rectangular strip is provided on the arc-shaped inner wall of the mounting ring (41) located at the top of the inner wall of the air intake pipe (34), and a rectangular groove adapted to the rectangular strip is provided on the arc-shaped outer wall of the top rod (44).

7. The injection mold for preventing product deformation according to claim 5, characterized in that: The outer surface of the lever (410) is arc-shaped, and the arc-shaped block (411) is thicker on the side closer to the center of the top rod (44) and thinner on the side farther away from the center of the top rod (44). The lever (410) and the arc-shaped block (411) are arranged in the same plane.

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