A pressing die and a die casting method

Abstract

The present invention relates to the field of mold technology, and specifically to a pressing mold and a die-casting method: comprising a hydraulic cylinder, an upper mold base and a lower mold base; the output end of the hydraulic cylinder is fixedly connected to the top of the upper mold base; an L-shaped guide rod is fixedly connected to the outer wall of the upper mold base, and the number of the L-shaped guide rods is four; the L-shaped guide rod is close to the side of the upper mold base, and a guide magnet is embedded in it; the lower mold base comprises an outer mold and an inner mold, the inner mold is fixed in the outer mold, and the outer wall of the inner mold forms a gap with the inner wall of the outer mold; the inner mold and the upper mold base are used to press the mold; the side wall of the inner mold is provided with air vents, the number of the air vents is four, and they are evenly distributed around the inner mold; the present invention discharges the air in the inner mold through the design of the air vents and magnets opened on the inner mold wall, reduces the probability of air holes on the surface or inside of the pressed part, improves the pressing quality of the pressed part, and increases the speed at which the pressed part is taken out through the design of the top block.

Description

Technical Field

[0001] The invention relates to the technical field of molds, in particular to a pressing mold and a die-casting method. Background Art

[0002] In manufacturing, there are more and more requirements for part shapes, and the manufacture of a special-shaped part is inseparable from pressing dies. Pressing dies are widely used in the machinery industry. The structure of pressing dies is also relatively simple, and the stamping of the upper and lower dies is used to complete the pressing of the product shape.

[0003] The pressing die in the prior art generally places the filler in the lower die, and the upper die is driven downward by a motor or a hydraulic cylinder to punch the filler so that the filler is pressed into a desired shape. After the punching is completed, the upper die moves up and returns to its original position to take out the finished product. However, in the prior art, when the upper die punches downward, the air in the lower die cannot be discharged, which may cause the gas to drill into the filler under pressure during the punching process, resulting in air on the surface or inside of the finished product, thereby posing a safety hazard to the finished product during use. Moreover, after the punching is completed, the filler is tightly attached to the lower die, causing difficulty for the staff to take it out.

[0004] In view of this, in order to overcome the above technical problems, the present invention designs a pressing mold and a die-casting method to solve the above technical problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is: in the prior art, when the upper mold is stamped downward, the air in the lower mold cannot be discharged, which may cause the gas to drill into the filler under pressure during the stamping process, resulting in the presence of air inside the finished product, thereby posing a safety hazard to the finished product during use; and after the stamping is completed, the filler is tightly attached to the lower mold, making it difficult for the staff to take it out.

[0006] The present invention provides a pressing die, comprising a hydraulic cylinder, an upper die seat and a lower die seat; the output end of the hydraulic cylinder is fixedly connected to the top of the upper die seat;

[0007] The outer wall of the upper die seat is fixedly connected with an L-shaped guide rod, and the number of the L-shaped guide rods is four and evenly distributed around the upper die seat; a guide magnet is embedded in the L-shaped guide rod on the side close to the upper die seat;

[0008] The lower die seat comprises an outer die and an inner die, the inner die is fixed in the outer die, and an outer wall of the inner die forms a gap with an inner wall of the outer die; the inner die cooperates with the upper die seat to press the die;

[0009] The side wall of the inner mold is provided with four air outlet holes, which are evenly distributed around the inner mold.

[0010] The outer wall of the inner mold is fixedly connected with a sliding seat, and the sliding seat is slidably connected with a sliding assembly; the sliding assembly includes a slider, a closed magnet and a return spring; the slider is fixedly connected to the closed magnet, an exhaust hole is provided on the slider, and a return spring is connected between the end of the slider away from the inner mold and the side wall of the sliding seat; the end of the closed magnet away from the inner wall of the outer mold is fixedly connected with a sealing plug;

[0011] The guide magnet and the closing magnet repel each other when they come into contact.

[0012] Preferably, the area of ​​the guide magnet is 2-4 times larger than that of the closing magnet.

[0013] Preferably, a groove is provided at the bottom of the outer mold, a top block is provided above the groove, the top block is embedded in the bottom of the inner mold, and is spirally driven with the inner mold;

[0014] A screw is provided between the top block and the groove, one end of the screw is fixedly connected to the top block, and the other end is rotatably connected to the bottom of the groove. A torsion spring is sleeved on the end of the screw rotatably connected to the bottom of the groove, and the torsion spring is used for resetting the top block.

[0015] A rigid rope is connected between the L-shaped guide rod and the screw rod, one end of the rigid rope is fixedly connected to the L-shaped guide rod, and the other end is guided by a guide wheel. After passing through a channel opened inside the outer mold, the rigid rope is wound around the surface of the screw rod and fixedly connected to the screw rod. An anti-slip groove is opened on the side of the screw rod that contacts the rigid rope, and the rigid rope is wound in the anti-slip groove.

[0016] Preferably, an air chamber is provided inside the upper die seat and is connected to an external air pipe.

[0017] Preferably, the guide magnet is a neodymium magnet.

[0018] A die-casting method for a pressing die is applicable to the pressing die described above, and the die-casting method is as follows:

[0019] a. Through the control of the controller, the external air pipe introduces hot air into the air chamber in the upper die base to preheat the upper die, and then puts the filler to be pressed into the inner die. When the temperature of the upper die base reaches 85℃-120℃, the controller starts the hydraulic cylinder to move the upper die downward;

[0020] b. During the downward movement of the upper mold, the gas in the inner mold is discharged through the vent holes and exhaust holes;

[0021] c. The upper die seat continues to move downward. When the bottom of the upper die seat contacts the filler, the repulsive force between the guide magnet and the closing magnet causes the slider to drive the sealing plug to move until the air outlet is blocked.

[0022] d. The upper die seat presses the filler. When the filler is pressed into shape, the upper die seat is kept stationary;

[0023] e. When the upper die seat is stationary, the controller introduces cold air into the air chamber of the upper die seat through an external air pipe to cool down and shape the pressed part;

[0024] f. After the cooling and shaping is completed, the controller controls the hydraulic cylinder to move the upper die seat upward. During the upward movement of the upper die seat, the rigid rope is driven by the L-shaped guide rod, so that the screw rotates to drive the top block to move upward, and the top block drives the pressed part to move upward.

[0025] The beneficial effects of the present invention are as follows:

[0026] 1. The present invention provides a pressing mold and a die-casting method, which discharges the air in the inner mold through the design of air vents and magnets opened on the inner mold wall, reduces the probability of air holes on the surface or inside of the pressed part, and improves the pressing quality of the pressed part. In addition, the design of the L-shaped guide rod facilitates the upper mold base to accurately enter the inner mold, preventing the upper mold base from shifting when moving toward the inner mold, thereby improving the accuracy of mold pressing.

[0027] 2. The present invention provides a pressing mold and a die-casting method, in which a top block is arranged at the bottom of the inner mold, and the top block is connected to the bottom of the outer mold by a screw. A rigid rope is wrapped around the surface of the bolt. When the upper mold moves upward, the rigid rope drives the bolt and makes the top block protrude in the inner mold, so that the pressed part moves upward in the inner mold, thereby improving the efficiency of the staff in removing the pressed part, thereby improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] Figure 1 It is a front view of the present invention;

[0030] Figure 2 is a top view of the lower die base in the present invention;

[0031] Figure 3 yes Figure 1 The enlarged view of point A in the middle;

[0032] Figure 4 yes Figure 1 Enlarged view of point B in the middle;

[0033] In the figure: hydraulic cylinder 1, upper die base 2, lower die base 3, L-shaped guide rod 4, guide magnet 5, inner die 6, outer die 7, air vent 8, sliding seat 9, sliding assembly 10, air chamber 11, rigid rope 12, top block 13, screw 14, torsion spring 15, guide wheel 16, external air pipe 17, slider 101, closing magnet 102, sealing plug 103, exhaust hole 104. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0035] The present invention provides a pressing die, comprising a hydraulic cylinder 1, an upper die base 2 and a lower die base 3; the output end of the hydraulic cylinder 1 is fixedly connected to the top of the upper die base 2;

[0036] The outer wall of the upper die base 2 is fixedly connected with an L-shaped guide rod 4, and the number of the L-shaped guide rods 4 is four and evenly distributed around the upper die base 2; the L-shaped guide rod 4 is close to the side of the upper die base 2, and a guide magnet 5 is embedded inside thereof;

[0037] The lower die base 3 includes an outer die 7 and an inner die 6, the inner die 6 is fixed in the outer die 7, and the outer wall of the inner die 6 forms a gap with the inner wall of the outer die 7; the inner die 6 cooperates with the upper die base 2 to press the die;

[0038] The side wall of the inner mold 6 is provided with air outlet holes 8, and the number of the air outlet holes 8 is four and evenly distributed around the inner mold 6;

[0039] The outer wall of the inner mold 6 is fixedly connected to a sliding seat 9, and the sliding seat 9 is slidably connected to a sliding assembly 10; the sliding assembly 10 includes a slider 101, a closed magnet 102 and a return spring; the slider 101 is fixedly connected to the closed magnet 102, and an exhaust hole 104 is provided on the slider 101. The end of the slider 101 away from the inner mold 6 is connected to the return spring between the side wall of the sliding seat 9; the end of the closed magnet 102 away from the inner wall of the outer mold 7 is fixedly connected to a sealing plug 103;

[0040] The guide magnet 5 and the closing magnet 102 repel each other when they come into contact.

[0041] When the pressed part needs to be pressed, the filler required for pressing is first placed in the inner mold 6, and then the hydraulic cylinder 1 is controlled by the controller to work, so that the output end of the hydraulic cylinder 1 drives the upper mold base 2 to move downward. First, the design of the L-shaped guide rod 4 facilitates the upper mold base 2 to accurately enter the inner mold 6, preventing the upper mold base 2 from deviating when moving toward the inner mold 6, thereby improving the accuracy of mold pressing;

[0042] Secondly, when the upper die seat 2 enters the inner die 6, the residual air in the inner die 6 is discharged through the air outlet 8 and the air outlet 104, thereby preventing the residual air in the inner die 6 from entering the pressed part during the pressing of the pressed part, resulting in the phenomenon of pores on the surface or inside of the pressed part, thereby improving the quality of the pressed part;

[0043] Furthermore, as the L-shaped guide rod 4 moves downward, the guide magnet 5 embedded in the L-shaped guide rod 4 gradually approaches the closed magnet 102. When the bottom of the upper die seat 2 contacts the pressed filler in the inner die 6, the guide magnet 5 contacts and repels the closed magnet 102, causing the closed magnet 102 to move on the sliding seat 9 through the slider 101, thereby driving the sealing plug 103 to enter the air outlet 8, so that the sealing plug 103 blocks the air outlet 8, preventing the filler from flowing out of the air outlet 8 when the pressed part is pressed, resulting in flash on the pressed part, thereby improving the pressing quality of the pressed part.

[0044] The present invention uses the design of the air outlet 8 to allow the residual air in the inner mold 6 to be discharged when the pressed part is pressed, thereby improving the pressing quality of the pressed part. In addition, the mutual cooperation between the guide magnet 5 and the closing magnet 102 can close the air outlet 8 while the pressed part is being pressed, thereby preventing the pressed part from having flash during pressing, thereby further improving the quality of the pressed part.

[0045] As mentioned in the present invention, when the bottom of the upper mold base 2 contacts with the pressed filler in the inner mold 6, the guide magnet 5 contacts with the closed magnet 102 and generates repulsion. During actual production and manufacturing, the actual position of the guide magnet 5 on the L-shaped guide rod 4 can be reasonably designed according to the actual volumes of the upper mold base 2 and the inner mold 6, as well as the actual capacity of the inner mold 6, so as to achieve that when the bottom of the upper mold base 2 contacts with the pressed filler in the inner mold 6, the guide magnet 5 contacts with the closed magnet 102 and generates repulsion. This does not require creative labor for those skilled in the art, so it will not be elaborated here.

[0046] As a specific implementation of the present invention, the area of ​​the guide magnet 5 is 2-4 times that of the closing magnet 102 .

[0047] When the bottom of the upper mold base 2 contacts the filler, the repulsive force between the guide magnet 5 and the closing magnet 102 causes the closing magnet 102 to drive the sealing plug 103 into the air outlet 8 to block the air outlet 8. At this time, the upper mold base 2 continues to move downward to press the filler, and the L-shaped guide rod 4 also continues to move downward with the upper mold base 2. Since the area of ​​the guide magnet 5 is larger than the closing magnet 102, the closing magnet 102 continues to be subjected to the repulsive force during the process in which the guide magnet 5 continues to move downward with the L-shaped guide rod 4, so that the sealing plug 103 always blocks the air outlet 8 to prevent the filler from being squeezed into the air outlet 8, thereby further preventing the occurrence of flash on the pressed part and further improving the pressing quality of the pressed part.

[0048] As a specific embodiment of the present invention, a groove is provided at the bottom of the outer mold 7, and a top block 13 is provided above the groove. The top block 13 is embedded in the bottom of the inner mold 6 and is screw-driven with the inner mold 6;

[0049] A screw rod 14 is provided between the top block 13 and the groove, one end of the screw rod 14 is fixedly connected to the top block 13 , and the other end is rotatably connected to the bottom of the groove. A torsion spring 15 is sleeved on the end of the screw rod 14 rotatably connected to the bottom of the groove, and the torsion spring 15 is used to reset the top block 13 .

[0050] A rigid rope 12 is connected between the L-shaped guide rod 4 and the screw rod 14. One end of the rigid rope 12 is fixedly connected to the L-shaped guide rod 4, and the other end is guided by a guide wheel 16. After passing through a channel opened inside the outer mold 7, the rigid rope 12 is wound around the surface of the screw rod 14 and fixedly connected to the screw rod 14. An anti-skid groove is provided on the side of the screw rod 14 that contacts the rigid rope 12, and the rigid rope 12 is wound in the anti-skid groove.

[0051] After completing the pressing of the filler, the upper mold base 2 moves upward to return to the initial position, and the L-shaped guide rod 4 moves upward with the upper mold base 2. The rigid rope 12 fixed to the L-shaped guide rod 4 is tightened and straightened. Since the rigid rope 12 is wrapped around the screw 14, when the rigid rope 12 moves after being straightened, the screw 14 will be rotated by the rigid rope 12, and the rotation of the screw 14 will drive the top block 13 to rotate. During the rotation of the top block 13, it will slowly protrude from the inner film base, causing the pressed part to move upward, making it easier to take out the pressed part, thereby further improving the pressing efficiency; before the next filling, the controller controls the upper mold base 2 to move downward a certain distance to relax the wire rope, so that the top block 13 is reset under the action of the torsion spring 15, which is convenient for the next pressing.

[0052] As a specific embodiment of the present invention, an air chamber 11 is opened inside the upper mold base 2 and is connected to an external air pipe 17; before the pressing starts, hot air is introduced into the air chamber 11 through the external air pipe to preheat the upper mold base 2, thereby improving the pressing effect of the upper mold base 2 on the pressed part during the pressing process, and further improving the quality of the pressed part; after the pressing is completed, the upper mold base 2 needs to stay in the inner film to shape the pressed part. When the upper mold base 2 stays, cold air is introduced into the air chamber 11 through the external air pipe, thereby increasing the cooling speed and cooling effect of the pressed part, further improving the quality of the pressed part, and improving production efficiency.

[0053] As a specific embodiment of the present invention, the guide magnet 5 is a neodymium magnet; after the pressing starts, the guide magnet 5 approaches the closed magnet 102 along with the L-shaped guide rod 4, and under the action of the repulsive force between the magnets, the closed magnet 102 is pushed, and the sealing plug 103 is pushed by the closed magnet 102 until the air outlet is blocked. The guide magnet 5 is a neodymium magnet, and the magnetic energy of the neodymium magnet is much greater than that of an ordinary magnet, so the guide magnet 5 can generate enough repulsive force to push the sealing plug 103 on the slider 101 to fit more closely with the air outlet 8, thereby improving the sealing performance of the sealing plug 103, further preventing the filler from overflowing into the air outlet 8, and further preventing the flash of the pressed part, thereby further improving the quality of the pressed part.

[0054] A die-casting method for a pressing die, suitable for the pressing die described above, the die-casting method is as follows;

[0055] a. Through the control of the controller, the external air pipe 17 passes hot air into the air chamber 11 in the upper mold base 2 to preheat the upper mold, and then put the filler to be pressed into the inner mold 6. When the temperature of the upper mold base 2 reaches 85℃-120℃, the controller starts the hydraulic cylinder 1 to move the upper mold downward;

[0056] b. During the downward movement of the upper mold, the gas in the inner mold 6 is discharged through the gas outlet 8 and the exhaust hole 104;

[0057] c. The upper die base 2 continues to move downward. When the bottom of the upper die base 2 contacts the filler, the repulsive force between the guide magnet 5 and the closing magnet 102 causes the slider 101 to drive the sealing plug 103 to move until the air outlet 8 is blocked;

[0058] d. The upper die base 2 presses the filler. After the filler is pressed and formed, the upper die base 2 is kept stationary;

[0059] e. When the upper die base 2 is stationary, the controller introduces cold air into the air chamber 11 of the upper die base 2 through the external air pipe 17 to cool down and shape the pressed part;

[0060] f. After the cooling and shaping is completed, the controller controls the hydraulic cylinder 1 to move the upper die base 2 upward. During the upward movement of the upper die base 2, the rigid rope 12 is driven by the L-shaped guide rod 4, so that the screw 14 rotates to drive the top block 13 to move upward, and the top block 13 drives the pressed part to move upward.

[0061] The specific workflow is as follows:

[0062] When the pressed part needs to be pressed, hot air is introduced into the air chamber 11 through the external air pipe to preheat the upper die seat 2. First, the filler required for pressing is placed in the inner die 6, and then the hydraulic cylinder 1 is controlled by the controller to work so that the output end of the hydraulic cylinder 1 drives the upper die seat 2 to move downward. First, the design of the L-shaped guide rod 4 facilitates the upper die seat 2 to accurately enter the inner die 6, preventing the upper die seat 2 from deviating when moving toward the inner die 6, thereby improving the accuracy of mold pressing;

[0063] Secondly, when the upper die seat 2 enters the inner die 6, the residual air in the inner die 6 is discharged through the air outlet 8 and the air outlet 104, thereby preventing the residual air in the inner die 6 from entering the pressed part during the pressing of the pressed part, resulting in the phenomenon of pores on the surface or inside of the pressed part, thereby improving the quality of the pressed part;

[0064] Furthermore, as the L-shaped guide rod 4 moves downward, the guide magnet 5 embedded in the L-shaped guide rod 4 gradually approaches the closed magnet 102. When the bottom of the upper die seat 2 contacts the pressed filler in the inner die 6, the guide magnet 5 contacts and repels the closed magnet 102, causing the closed magnet 102 to move on the sliding seat 9 through the slider 101, thereby driving the sealing plug 103 to enter the air outlet 8, so that the sealing plug 103 blocks the air outlet 8, preventing the filler from flowing out of the air outlet 8 when the pressed part is pressed, resulting in The flash of the pressed part is reduced, thereby improving the pressing quality of the pressed part; since the area of ​​the guide magnet 5 is larger than the closed magnet 102, the closed magnet 102 is continuously subjected to a repulsive force when the guide magnet 5 continues to move downward with the L-shaped guide rod 4, and the guide magnet is a neodymium magnet 5, which can generate sufficient repulsive force to push the sealing plug 103 on the slider 101 to fit more closely with the air outlet 8, thereby improving the sealing performance of the sealing plug 103, so that the sealing plug 103 always blocks the air outlet 8, and prevents the filler from being squeezed into the air outlet 8;

[0065] After completing the pressing of the filler, the controller introduces cold air into the air chamber 11 through the external air pipe 17 to cool and shape the pressed part. After cooling and shaping, the upper mold base 2 moves upward to return to the initial position, and the L-shaped guide rod 4 moves upward with the upper mold base 2. The rigid rope 12 fixed to the L-shaped guide rod 4 is tightened and straightened. Since the rigid rope 12 is wrapped around the screw 14, when the rigid rope 12 moves after being straightened, the screw 14 will be rotated by the rigid rope 12, and the rotation of the screw 14 will drive the top block 13 to rotate. During the rotation of the top block 13, it will slowly protrude from the inner film base, causing the pressed part to move upward, making it easier to take out the pressed part; before the next filling, the controller controls the upper mold base 2 to move downward a certain distance to relax the wire rope, so that the top block 13 is reset under the action of the torsion spring 15, which is convenient for the next pressing.

[0066] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A pressing die, characterized in that: The invention comprises a hydraulic cylinder (1), an upper die seat (2) and a lower die seat (3); the output end of the hydraulic cylinder (1) is fixedly connected to the top of the upper die seat (2); an L-shaped guide rod (4) is fixedly connected to the outer wall of the upper die seat (2); the number of the L-shaped guide rods (4) is four and they are evenly distributed around the upper die seat (2); a guide magnet (5) is embedded in the L-shaped guide rod (4) on the side close to the upper die seat (2); the lower die seat (3) comprises an outer die (7) and an inner die (6); the inner die (6) is fixed in the outer die (7), and a distance is formed between the outer wall of the inner die (6) and the inner wall of the outer die (7); the inner die (6) cooperates with the upper die seat (2) for pressing the die; the side wall of the inner die (6) is provided with an air outlet (8), and the air outlet (8) is provided in the side wall of the inner die (6). 8) is four in number and is evenly distributed around the inner mold (6); the outer wall of the inner mold (6) is fixedly connected with a sliding seat (9), and the sliding seat (9) is slidably connected with a sliding assembly (10); the sliding assembly (10) comprises a slider (101), a closed magnet (102) and a return spring; the slider (101) is fixedly connected with the closed magnet (102), an exhaust hole (104) is provided on the slider (101), and a return spring is connected between the end of the slider (101) away from the inner mold (6) and the side wall of the sliding seat (9); the end of the closed magnet (102) away from the inner wall of the outer mold (7) is fixedly connected with a sealing plug (103); the guide magnet (5) and the closed magnet (102) repel each other when they come into contact; During the downward movement of the upper mold, the gas in the inner mold (6) is discharged through the vent hole (8) and the exhaust hole (104); the upper mold base (2) continues to move downward, and when the bottom of the upper mold base (2) contacts the filler, the repulsive force between the guide magnet (5) and the closing magnet (102) causes the slider (101) to drive the sealing plug (103) to move until the vent hole (8) is blocked.

2. A pressing die according to claim 1, characterized in that: The area of ​​the guide magnet (5) is 2-4 times that of the closing magnet (102).

3. A pressing die according to claim 1, characterized in that: A groove is provided at the bottom of the outer mold (7), and a top block (13) is provided above the groove. The top block (13) is embedded in the bottom of the inner mold (6) and is screwed with the inner mold (6). A screw rod (14) is provided between the top block (13) and the groove. One end of the screw rod (14) is fixedly connected to the top block (13), and the other end is rotatably connected to the bottom of the groove. A torsion spring (15) is sleeved on the end of the screw rod (14) rotatably connected to the bottom of the groove. The torsion spring (15) is used to rotate the top block (13). ) reset; a rigid rope (12) is connected between the L-shaped guide rod (4) and the screw rod (14); one end of the rigid rope (12) is fixedly connected to the L-shaped guide rod (4), and the other end is guided by a guide wheel (16), and after passing through a channel opened inside the outer mold (7), it is wound around the surface of the screw rod (14) and fixedly connected to the screw rod (14); an anti-skid groove is opened on the side of the screw rod (14) that contacts with the rigid rope (12), and the rigid rope (12) is wound in the anti-skid groove.

4. A pressing die according to claim 1, characterized in that: An air chamber (11) is provided inside the upper die seat (2) and is connected to an external air pipe (17).

5. A pressing die according to claim 1, characterized in that: The guide magnet (5) is a neodymium magnet.

6. A die-casting method for a pressing die, the die-casting method being applicable to the pressing die according to any one of claims 1 to 5, characterized in that: The molding method is as follows a. Through the control of the controller, the external air pipe (17) introduces hot air into the air chamber (11) in the upper mold base (2) to preheat the upper mold, and then the filler to be pressed and formed is placed in the inner mold (6). When the temperature of the upper mold base (2) reaches 85°C-120°C, the controller starts the hydraulic cylinder (1) to move the upper mold downward; b. During the downward movement of the upper mold, the gas in the inner mold (6) is discharged through the gas outlet (8) and the exhaust hole (104); c. The upper die base (2) continues to move downward. When the bottom of the upper die base (2) contacts the filler, the repulsive force between the guide magnet (5) and the closing magnet (102) causes the slider (101) to drive the sealing plug (103) to move until the air outlet (8) is blocked. d. The upper die base (2) presses the filler, and when the filler is pressed into shape, the upper die base (2) is kept stationary; e. When the upper die base (2) is stationary, the controller introduces cold air into the air chamber (11) of the upper die base (2) through the external air pipe (17) to cool and shape the pressed part; f. After the cooling and shaping is completed, the controller controls the hydraulic cylinder (1) to move the upper die seat (2) upward. During the upward movement of the upper die seat (2), the rigid rope (12) is driven by the L-shaped guide rod (4), so that the screw (14) rotates to drive the top block (13) to move upward, and the top block (13) drives the pressed part to move upward.

Images