Automobile part injection mold and injection molding method thereof

Abstract

The invention discloses an automobile part injection mold, and relates to the technical field of mold injection molding, the automobile part injection mold comprises an upper mold and a lower mold arranged under the upper mold, the bottom end of the lower mold is fixedly connected with a base, the automobile part injection mold comprises a liquid collection tank, the upper mold is in threaded connection with the bottom end of the lower mold, and the liquid collection tank is communicated with the lower mold through a liquid discharge hole; the limiting column is fixedly connected to the top end of the base; the material pushing and liquid collecting mechanism is arranged between the lower die and the base, and the material pushing and liquid collecting mechanism is used for being matched with the limiting column to control the upper die and the lower die to be in an opening and closing state and a sealing state, and pushing a formed part in a reciprocating mode when the upper die and the lower die are in the opening and closing state. And the formed part in the lower mold cavity can be intermittently jacked, the demolding efficiency of the formed part is improved, and abrasion generated by demolding of the formed part is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of mold injection, in particular to an automobile component injection mold and an injection molding method thereof. Background Art

[0002] Auto parts are the units that make up the whole of auto parts processing and the products that serve auto parts processing. Injection molds are tools for producing plastic products and also tools that give plastic products complete structures and precise dimensions. Injection molding is a processing method used in batch production of certain parts with complex shapes. Specifically, it refers to injecting heated and melted plastic into the mold cavity under high pressure by an injection molding machine, and obtaining a molded product after cooling and solidification. When demoulding the existing injection molds for automobile parts, personnel usually need to separate the upper mold from the lower mold first, and then insert the tool into the gap between the molded parts and the lower mold to remove the warped parts. In this process, the demoulding process of the molded parts is complicated and inefficient, and is easily worn by the warping of the tools. In view of this, the present invention provides an automobile component injection mold and an injection molding method thereof to compensate for and improve the deficiencies of the prior art. Summary of the invention

[0003] In order to solve the above technical problems, the technical solution adopted by the present invention is: an injection mold for automobile parts, comprising an upper mold and a lower mold arranged directly below the upper mold, wherein the bottom end of the lower mold is fixedly connected to a base, and the injection mold for automobile parts comprises: The liquid collecting tank is screwed to the bottom of the lower mold by the upper mold thread, and the liquid collecting tank is connected with the lower mold through the drainage hole; A limit column, which is fixedly connected to the top of the base; The material pushing and liquid collecting mechanism is arranged between the lower mold and the base, and is used to cooperate with the limit column to control the upper mold and the lower mold to be in the open and closed state and the sealed state, and reciprocate the molding parts when the upper mold and the lower mold are in the open and closed state.

[0004] Preferably, the material pushing and liquid collecting mechanism includes a servo motor installed at the bottom end of the base, the output end of the servo motor is fixedly connected to a cam, the outer surface of the cam abuts against a supply and movement wheel, the top of the supply and movement wheel is fixedly connected to a lifting rod, the top of the lifting rod is fixedly connected to a universal ball table, the top of the universal ball table is rotatably connected to a moving rod, and the top of the moving rod is fixedly connected to a piston column.

[0005] Preferably, the material pushing and liquid collecting mechanism also includes a support platform fixedly connected to the top of the base, a balance rod is hinged at the middle section of the support platform, one end of the balance rod is fixedly connected to a knocking column, the other end of the balance rod is hinged to a connecting rod, and the end of the connecting rod away from the balance rod is hinged to a swing rod.

[0006] Preferably, the material pushing and liquid collecting mechanism also includes a toothed disc rotatably connected to the swing arm via a rotating shaft, a main shift block is hinged on the inner wall of the swing arm, and the main shift block is meshed with the toothed disc, a baffle is fixedly connected to the inner wall of the swing arm, and a secondary shift block is rotatably connected to the outer surface of the base, and the secondary shift block is meshed with the toothed disc.

[0007] Preferably, the material pushing and liquid collecting mechanism also includes a main bevel gear fixedly connected to the gear disk through a rotating shaft, a threaded rod is rotatably connected to the base, a secondary bevel gear is fixedly connected to the bottom end of the threaded rod, and the secondary bevel gear is meshed with the main bevel gear, and the threaded rod is threadedly connected to the upper mold.

[0008] Preferably, a spring is fixedly connected to the bottom end of the balancing rod, and one end of the spring away from the balancing rod is fixedly connected to the base, the balancing rod is fixedly connected to the lifting rod, and the lifting rod is located between the support platform and the knocking column.

[0009] Preferably, the material pushing and liquid collecting mechanism further comprises a liquid storage tube provided on the lower mold, one end of the liquid storage tube is communicated with the mold cavity of the lower mold, and the other end of the liquid storage tube is communicated with the liquid discharge hole.

[0010] An injection molding method for an automobile component injection mold specifically comprises the following steps: Step 1: The staff controls the control panel to drive the servo motor to rotate its output end clockwise, thereby making the balance bar swing up and down along the support platform through the cooperation of the cam and the supply wheel, and then the balance bar is linked to the threaded rod through the quantitative rotating component to follow the rotation, so that the upper mold continues to move downward toward the lower mold until the upper mold and the lower mold are in a sealed state, at which time the drive of the servo motor is stopped; Step 2: The staff injects the heated and melted plastic mold liquid into the mold cavity between the upper mold and the lower mold through the material pipe at the center of the upper mold, and the excess plastic mold liquid flows into the liquid storage tube and the piston rod in the high-pressure chamber for storage, while the plastic mold liquid in the mold cavity is cooled and solidified; Step 3: The staff controls the operation panel to drive the servo motor to rotate its output end counterclockwise, causing the balance bar to carry the knocking column and the supply wheel to swing back and forth up and down, and then the balance bar is linked to the threaded rod through the quantitative rotating component to follow the rotation, so that the upper mold continues to move upward in the direction away from the lower mold. At the same time, the up and down swinging of the piston column causes the excess plastic mold pressure stored in the liquid storage tube to be pressed into the liquid collecting tank, and the molded parts in the mold cavity are pushed and loosened, while the up and down swinging of the knocking column knocks the lower mold, making the molded parts easier to loosen and remove.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The present invention uses the coordinated use of the structures such as the balance rod, the connecting rod and the swing rod, and can utilize the counterclockwise rotation of the cam to make the supply wheel linked with the balance rod and the piston column to move up and down reciprocatingly, so that the piston column intermittently lifts the molded parts in the lower mold cavity, so that personnel can take the molded parts. The reciprocating up and down movement of the balance rod can also be linked to make the gear plate intermittently rotate, and the cooperation of the main bevel gear and the auxiliary bevel gear can promote the rotation of the threaded rod to drive the upper mold to rise vertically along it, which can not only separate the upper mold from the lower mold, but also intermittently lift the molded parts in the lower mold cavity, thereby improving the demoulding efficiency of the molded parts and reducing the wear caused by the demoulding of the molded parts. The present invention uses the coordinated use of the structures such as the balance bar, the spring and the knocking column, so that when the supply wheel links the balance bar to move up and down reciprocatingly, the balance bar moves and intermittently knocks the lower mold, thereby vibrating the molded parts in the mold cavity of the lower mold, so as to accelerate the loosening of the molded parts and further improve the demoulding efficiency of the molded parts. The present invention uses a liquid storage tube in conjunction with a piston column and other structures, so that when the upper mold and the lower mold are in a sealed state, the liquid storage tube can store excess injection liquid. When the upper mold and the lower mold are in an open and closed state, the piston column moves up and down in coordination, so that the excess injection liquid stored in the liquid storage tube can be collected into a liquid collecting tank by the pressurization of the piston column and accelerated, thereby effectively recycling the excess injection liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the present invention; Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention; Figure 3 The present invention shows Figure 2 The enlarged structural diagram at A in the middle; Figure 4 The present invention shows Figure 2 The enlarged structural diagram at B in the middle; Figure 5 It is a schematic diagram of the connection structure between the main bevel gear and the auxiliary bevel gear shown in the present invention; Figure 6 It is a schematic diagram of the connection structure between the toothed disc and the main shifting block shown in the present invention.

[0013] The numbers in the figure are: 1. Upper die; 2. Lower die; 3. Material pushing and liquid collecting mechanism; 4. Base; 5. Liquid collecting tank; 6. Limiting column; 31. Servo motor; 32. Cam; 33. Supply and shift wheel; 34. Support platform; 35. Balance bar; 36. Spring; 37. Knocking column; 38. Lifting rod; 39. Universal ball table; 310. Moving rod; 311. Piston column; 312. Liquid storage tube; 313. Connecting rod; 314. Swinging rod; 315. Baffle bar; 316. Main shift block; 317. Toothed plate; 318. Auxiliary shift block; 319. Main bevel gear; 320. Auxiliary bevel gear; 321. Threaded rod. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] Embodiment 1 of the present invention Please refer to Figures 1 to 6 As shown, an injection mold for automobile parts includes an upper mold 1 and a lower mold 2 arranged directly below the upper mold 1, wherein the bottom end of the lower mold 2 is fixedly connected to a base 4. An injection mold for automobile parts includes: The liquid collecting tank 5, the upper mold 1 is screwed to the bottom end of the lower mold 2, and the liquid collecting tank 5 is connected with the lower mold 2 through the drainage hole; A limiting column 6, the limiting column 6 is fixedly connected to the top of the base 4; The material pushing and liquid collecting mechanism 3 is arranged between the lower mold 2 and the base 4, and the material pushing and liquid collecting mechanism 3 is used to cooperate with the limiting column 6 to control the upper mold 1 and the lower mold 2 to be in the open and closed state and the sealed state, and reciprocate the molding parts when the upper mold 1 and the lower mold 2 are in the open and closed state; The material pushing and liquid collecting mechanism 3 includes a servo motor 31 installed at the bottom end of the base 4, the output end of the servo motor 31 is fixedly connected to a cam 32, the outer surface of the cam 32 abuts against a supply and transfer wheel 33, the top of the supply and transfer wheel 33 is fixedly connected to a lifting rod 38, the top of the lifting rod 38 is fixedly connected to a universal ball table 39, the top of the universal ball table 39 is rotatably connected to a moving rod 310, and the top of the moving rod 310 is fixedly connected to a piston column 311; The material pushing and liquid collecting mechanism 3 also includes a support platform 34 fixedly connected to the top of the base 4, a balance bar 35 is hingedly connected at the middle section of the support platform 34, one end of the balance bar 35 is fixedly connected to a knocking column 37, the other end of the balance bar 35 is hingedly connected to a connecting rod 313, and the end of the connecting rod 313 away from the balance bar 35 is hingedly connected to a swinging rod 314; The material pushing and liquid collecting mechanism 3 also includes a toothed disc 317 rotatably connected to the swing rod 314 through a rotating shaft, a main shifting block 316 is hingedly connected to the inner wall of the swing rod 314, and the main shifting block 316 is meshed and matched with the toothed disc 317, a stopper 315 is fixedly connected to the inner wall of the swing rod 314, and an auxiliary shifting block 318 is rotatably connected to the outer surface of the base 4, and the auxiliary shifting block 318 is meshed and matched with the toothed disc 317; The material pushing and liquid collecting mechanism 3 also includes a main bevel gear 319 fixedly connected to the toothed disc 317 through a rotating shaft, a threaded rod 321 is rotatably connected to the base 4, a secondary bevel gear 320 is fixedly connected to the bottom end of the threaded rod 321, and the secondary bevel gear 320 is meshed and matched with the main bevel gear 319, and the threaded rod 321 is threadedly connected to the upper mold 1; The bottom end of the balance bar 35 is fixedly connected with a spring 36, and one end of the spring 36 away from the balance bar 35 is fixedly connected to the base 4, the balance bar 35 is fixedly connected to the lifting rod 38, and the lifting rod 38 is located between the support platform 34 and the knocking column 37; The material pushing and liquid collecting mechanism 3 also includes a liquid storage tube 312 opened on the lower mold 2, one end of the liquid storage tube 312 is connected to the mold cavity of the lower mold 2, and the other end of the liquid storage tube 312 is connected to the liquid discharge hole; Supplementary explanation: the connecting rod 313, the swing rod 314, the main shifting block 316, the toothed disc 317, the auxiliary shifting block 318, and the rotating shaft constitute a certain amount of rotating parts, and the quantitative rotating parts facilitate personnel to accurately control the distance between the upper mold 1 and the lower mold 2; The stop bar 315 is fixed obliquely to the inner wall of the swing rod 314 so as to support the main shift block 316 obliquely so that it can be precisely engaged with the gear plate 317 when moving; The staff can conduct multiple experiments and tests to ensure that when the balance rod 35 is in a horizontal state, the top of the piston rod 311 is just flush with the inner bottom surface of the lower mold 2, so as to ensure the integrity of the molded parts in the mold cavity of the lower mold 2, and at this time, the piston rod 311 blocks the liquid storage tube 312, so as to ensure that the upper mold 1 and the lower mold 2 are in a sealed state; The limiting column 6 is slidably connected to the upper mold 1, and the limiting column 6 is used to cooperate with the rotation of the threaded rod 321 to limit the upper mold 1 so that the upper mold 1 can rise and fall vertically along it; The above scheme is adopted: through the coordinated use of the structures such as the balance bar 35, the connecting rod 313 and the swing rod 314, the counterclockwise rotation of the cam 32 can be used to make the supply and transfer wheel 33 link the balance bar 35 and the piston rod 311 to move up and down reciprocatingly, so that the piston rod 311 intermittently lifts the molded parts in the cavity of the lower mold 2, so that personnel can take the molded parts. The reciprocating up and down movement of the balance bar 35 can also link the toothed disc 317 to rotate intermittently, and the cooperation of the main bevel gear 319 and the auxiliary bevel gear 320 can cause the threaded rod 321 to rotate and drive the upper mold 1 to rise vertically along it, which can not only separate the upper mold 1 from the lower mold 2, but also intermittently lift the molded parts in the cavity of the lower mold 2, thereby improving the demoulding efficiency of the molded parts and reducing the wear caused by the demoulding of the molded parts. By using the coordinated structures such as the balancing rod 35, the spring 36 and the knocking column 37, when the supply wheel 33 links the balancing rod 35 to move up and down, the lower mold 2 can be knocked intermittently following the movement of the balancing rod 35, so as to vibrate the molded parts in the mold cavity of the lower mold 2, so as to accelerate the loosening of the molded parts and further improve the demoulding efficiency of the molded parts; By using the liquid storage tube 312 in conjunction with the piston column 311 and other structures, when the upper mold 1 and the lower mold 2 are in a sealed state, the liquid storage tube 312 can store excess injection liquid. When the upper mold 1 and the lower mold 2 are in an open and closed state, the piston column 311 reciprocates up and down to allow the excess injection liquid stored therein to be collected into the liquid collecting tank 5 by the pressurization of the piston column 311, thereby effectively recycling the excess injection liquid.

[0016] Embodiment 2 of the present invention An injection molding method for an automobile component injection mold specifically comprises the following steps: Step 1: The staff controls the control panel to drive the servo motor 31 to rotate its output end clockwise, thereby making the balance bar 35 swing up and down along the support platform 34 through the cooperation of the cam 32 and the supply wheel 33, and then the balance bar 35 is linked to the threaded rod 321 by the quantitative rotating component to follow the rotation, so that the upper mold 1 continues to move downward toward the lower mold 2 until the upper mold 1 and the lower mold 2 are in a sealed state, at which time the driving of the servo motor 31 is stopped; Step 2: The staff injects the heated and melted injection liquid into the mold cavity between the upper mold 1 and the lower mold 2 through the material passing pipe at the center of the upper mold 1 by the injection molding machine under high pressure. The excess injection liquid flows into the liquid storage tube 312 and the piston rod 311 in the high-pressure chamber for storage, and the injection liquid in the mold cavity is cooled and solidified to form; Step three: The staff controls the operation panel to drive the servo motor 31 to rotate its output end counterclockwise, so that the balance bar 35 carries the knocking column 37 and the supply wheel 33 to swing back and forth up and down, and then the balance bar 35 is linked to the threaded rod 321 through the quantitative rotating component to follow the rotation, so that the upper mold 1 continues to move upward in the direction away from the lower mold 2. At the same time, the up and down swinging of the piston column 311 causes the excess injection molding fluid stored in the liquid storage tube 312 to flow into the liquid collecting tank 5, and pushes the molded parts in the mold cavity to loosen them, and the up and down swinging of the knocking column 37 knocks on the lower mold 2, making the molded parts easier to loosen and take.

[0017] The working principle and use process of the present invention: For the convenience of description and understanding, this working process is mainly described by the opening and closing state and the sealing state: In the sealed state: the staff controls the control panel to drive the servo motor 31 to rotate its output end clockwise. Since the output end of the servo motor 31 is fixedly connected to the cam 32, the outer surface of the cam 32 abuts against the supply and transfer wheel 33, causing the cam 32 to intermittently squeeze the supply and transfer wheel 33 and carry the lifting rod 38 to rise. In addition, since the middle section of the support platform 34 is hinged with the balance bar 35, the two ends of the spring 36 are respectively fixed to the balance bar 35 and the base 4, causing the balance bar 35 to intermittently move up and down, and one end of the balance bar 35 is hinged to the connecting rod 313, and one end of the connecting rod 313 is hinged with a swing rod 314. The swing rod 314 is hinged to the swing rod 314. 14 is connected to the toothed disc 317 by rotating the rotating shaft, the swing rod 314 is hinged to the main shifting block 316, the swing rod 314 is fixedly connected to the blocking bar 315, and the outer surface of the base 4 is rotatably connected to the auxiliary shifting block 318, and the auxiliary shifting block 318 is meshed with the toothed disc 317, so that the balance rod 35 is intermittently moved up and down to link the toothed disc 317 to rotate, and the auxiliary bevel gear 320 is meshed with the main bevel gear 319 to link the threaded rod 321 to rotate, so as to drive the upper mold 1 to move vertically downward until the upper mold 1 and the lower mold 2 are in a sealed state, at which time the driving of the servo motor 31 is stopped; The staff injects the heated and melted plastic mold liquid into the mold cavity between the upper mold 1 and the lower mold 2 through the material passing pipe at the center of the upper mold 1 by the injection molding machine under high pressure. The excess plastic mold liquid flows into the liquid storage tube 312 and the piston rod 311 in the high pressure chamber for storage, and the plastic mold liquid in the mold cavity is cooled and solidified to form; In the open and closed state, the staff controls the operation panel to drive the servo motor 31 to rotate its output end counterclockwise, and the above working process is reversed to move the upper mold 1 vertically upward. Since one end of the balance rod 35 is fixedly connected to the knocking column 37, and the lifting rod 38 is fixedly connected to the universal ball table 39, the universal ball table 39 is rotatably connected to the moving rod 310, and the moving rod 310 is fixedly connected to the piston column 311, so that the piston column 311 and the knocking column 37 follow the balance rod 35 and move up and down intermittently, so that the upper mold 1 continues to move upward in the direction away from the lower mold 2. At the same time, the up and down swing of the piston column 311 causes the excess injection molding fluid stored in the liquid storage tube 312 to be pressed into the liquid collecting tank 5, and the molded parts in the mold cavity are pushed and loosened, and the up and down swing of the knocking column 37 knocks the lower mold 2, making the molded parts easier to loosen and take.

[0018] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0019] 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. An injection mold for automobile parts, comprising an upper mold (1) and a lower mold (2) arranged directly below the upper mold (1), wherein the bottom end of the lower mold (2) is fixedly connected to a base (4), characterized in that: The automotive parts injection mold comprises: A liquid collecting tank (5), wherein the upper mold (1) is screwed to the bottom end of the lower mold (2), and the liquid collecting tank (5) is connected to the lower mold (2) through a drainage hole; A limiting column (6), wherein the limiting column (6) is fixedly connected to the top of the base (4); A material pushing and liquid collecting mechanism (3) is arranged between the lower mold (2) and the base (4), and is used to cooperate with the limiting column (6) to control the upper mold (1) and the lower mold (2) to be in an open and closed state and a sealed state, and to reciprocate and push the molded parts when the upper mold (1) and the lower mold (2) are in the open and closed state.

2. The automotive parts injection mold according to claim 1, characterized in that: The material pushing and liquid collecting mechanism (3) comprises a servo motor (31) mounted on the bottom end of a base (4); the output end of the servo motor (31) is fixedly connected to a cam (32); the outer surface of the cam (32) is in contact with a supply and transfer wheel (33); the top end of the supply and transfer wheel (33) is fixedly connected to a lifting rod (38); the top end of the lifting rod (38) is fixedly connected to a universal ball table (39); the top end of the universal ball table (39) is rotatably connected to a moving rod (310); the top end of the moving rod (310) is fixedly connected to a piston column (311).

3. The automotive parts injection mold according to claim 2, characterized in that: The material pushing and liquid collecting mechanism (3) further comprises a support platform (34) fixedly connected to the top of the base (4); a balance rod (35) is hingedly connected at the middle section of the support platform (34); one end of the balance rod (35) is fixedly connected to a knocking column (37); the other end of the balance rod (35) is hingedly connected to a connecting rod (313); and the end of the connecting rod (313) away from the balance rod (35) is hingedly connected to a swing rod (314).

4. The automotive component injection mold according to claim 3, characterized in that: The material pushing and liquid collecting mechanism (3) further comprises a toothed disc (317) rotatably connected to the swing rod (314) via a rotating shaft; a main shifting block (316) is hingedly connected to the inner wall of the swing rod (314), and the main shifting block (316) and the toothed disc (317) are meshed and matched; a retaining bar (315) is fixedly connected to the inner wall of the swing rod (314); and an auxiliary shifting block (318) is rotatably connected to the outer surface of the base (4), and the auxiliary shifting block (318) and the toothed disc (317) are meshed and matched.

5. The automotive component injection mold according to claim 4, characterized in that: The material pushing and liquid collecting mechanism (3) further comprises a main bevel gear (319) fixedly connected to the toothed disc (317) via a rotating shaft, a threaded rod (321) is rotatably connected to the base (4), a secondary bevel gear (320) is fixedly connected to the bottom end of the threaded rod (321), and the secondary bevel gear (320) is meshed and matched with the main bevel gear (319), and the threaded rod (321) is threadedly connected to the upper die (1).

6. The automotive component injection mold according to claim 3, characterized in that: The bottom end of the balancing rod (35) is fixedly connected to a spring (36), and one end of the spring (36) away from the balancing rod (35) is fixedly connected to the base (4). The balancing rod (35) is fixedly connected to a lifting rod (38), and the lifting rod (38) is located between the support platform (34) and the knocking column (37).

7. The automotive component injection mold according to claim 2, characterized in that: The material pushing and liquid collecting mechanism (3) further comprises a liquid storage tube (312) provided on the lower mold (2), one end of the liquid storage tube (312) being in communication with the mold cavity of the lower mold (2), and the other end of the liquid storage tube (312) being in communication with the liquid discharge hole.

8. The method for injection molding of an automobile component injection mold according to any one of claims 1 to 7, characterized in that: The specific steps include: Step 1: The staff controls the control panel to drive the servo motor (31) so that its output end rotates clockwise, thereby causing the balance bar (35) to swing back and forth along the support platform (34) through the cooperation of the cam (32) and the supply wheel (33), and then the balance bar (35) is linked to the threaded rod (321) through the quantitative rotating component to rotate accordingly, so that the upper mold (1) continues to move downward toward the lower mold (2) until the upper mold (1) and the lower mold (2) are in a sealed state, at which time the driving of the servo motor (31) is stopped; Step 2: The staff injects the heated and melted injection liquid into the mold cavity between the upper mold (1) and the lower mold (2) through the material passage at the center of the upper mold (1) by the high pressure of the injection molding machine. The excess injection liquid flows into the liquid storage tube (312) and the piston rod (311) in the high pressure chamber for storage, and the injection liquid in the mold cavity is cooled and solidified to form; Step 3: The staff controls the control panel to drive the servo motor (31) to rotate its output end counterclockwise, so that the balance bar (35) carries the knocking column (37) and the supply wheel (33) to swing back and forth up and down, and then the balance bar (35) is linked to the threaded rod (321) through the quantitative rotating component to follow the rotation, so that the upper mold (1) continues to move upward in the direction away from the lower mold (2). At the same time, the up and down swinging of the piston column (311) causes the excess injection fluid stored in the liquid storage tube (312) to flow into the liquid collecting tank (5), and pushes the molded parts in the mold cavity to loosen them, while the up and down swinging of the knocking column (37) knocks the lower mold (2), making the molded parts easier to loosen and take out.

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