CN110884155B

CN110884155B - Efficient and stable plastic forming machine

Info

Publication number: CN110884155B
Application number: CN201911079146.9A
Authority: CN
Inventors: 吴丽彬; 沈益强; 王小波; 杨天银; 林孝啸
Original assignee: Wenzhou Oubo Machinery Co ltd
Current assignee: Zhejiang Ono Machinery Co ltd
Priority date: 2019-11-06
Filing date: 2019-11-06
Publication date: 2021-12-21
Anticipated expiration: 2039-11-06
Also published as: CN110884155A

Abstract

The invention discloses a high-efficiency stable plastic forming machine which comprises a rack, a feeding mechanism, a material pulling sheet mechanism, a heating mechanism, a forming mechanism, a punching mechanism, a blanking mechanism, a stacking and discharging mechanism and a waste collecting mechanism. Heating mechanism, forming mechanism, the mechanism of punching, blanking mechanism, pile up discharge mechanism, receive waste material mechanism and install in the frame in proper order, forming device includes forming motor forming mechanism, forming motor and forming structure setting are in the frame and interconnect, perforating device includes the motor of punching and the mechanism of punching, the motor of punching and the mechanism setting of punching are in the frame and interconnect, blanking device includes blanking motor and blanking mechanism, blanking motor and blanking mechanism set up in the frame and interconnect. When processing, a station is driven separately by a forming motor, a punching motor and a blanking motor respectively, so that the output force is prevented from being dispersed, and the situation that the force output by the motors is insufficient is avoided.

Description

Efficient and stable plastic forming machine

Technical Field

The invention relates to a plastic forming machine, in particular to a high-efficiency and stable plastic forming machine.

Background

Chinese patent application No. (201410730982. X; publication No. CN 104441587B) discloses a plastic cup cover thermoforming machine, wherein a die forming device, a punching device and a blanking device of the thermoforming machine are driven by a main motor to drive a main transmission shaft. In the process of equipment operation, the main motor needs to drive three devices simultaneously, the output power may not support the operation of the equipment, and in the event of single device failure, the devices are mutually associated, so that the maintenance is inconvenient.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the efficient and stable plastic forming machine, so that the equipment can stably run and is convenient to maintain.

In order to achieve the purpose, the invention provides the following technical scheme: a high-efficiency and stable plastic forming machine comprises a frame, a feeding mechanism, a material pulling sheet mechanism, a heating mechanism, a forming mechanism, a punching mechanism, a blanking mechanism, a stacking and discharging mechanism and a waste collecting mechanism, wherein the feeding mechanism is arranged at the front end of the frame; the heating mechanism, the forming mechanism, the punching mechanism, the blanking mechanism, the stacking and discharging mechanism and the waste collecting mechanism are sequentially arranged on the rack backwards; the material pulling sheet mechanism traverses the heating mechanism, the forming mechanism, the punching mechanism, the blanking mechanism and the stacking and discharging mechanism; the molding mechanism comprises a molding servo motor and a molding structure and is connected with the rack in a matching way; the punching mechanism comprises a punching servo motor and a punching structure and is matched and connected with the rack; the blanking mechanism comprises a blanking servo motor and a blanking structure and is connected with the rack in a matched mode.

As a further improvement of the invention, the heating mechanism comprises an upper heating support, a lower heating support, a telescopic cylinder and two groups of heating bodies, wherein the telescopic direction is vertical to the moving direction of the plastic sheet; be provided with the heating guide rail that two sets of directions and telescopic cylinder telescopic direction are the same in the frame, go up heating support and lower heating support and slide the setting respectively on heating guide rail, two sets of heating members are installed respectively on last heating support and lower heating support, go up heating support and lower heating support and be connected with telescopic cylinder movable one end, telescopic cylinder's the other end and frame are connected, when equipment continuous operation, telescopic cylinder promotes the heating member and moves to the vertical intermediate position of drawing material sheet mechanism, when equipment trouble or initial condition down, the heating member breaks away from and draws material sheet mechanism.

As a further improvement of the invention, a linear rail is arranged on the rack, the linear rail is horizontally arranged, the extension direction of the linear rail is the same as the movement direction of the plastic sheet, and a forming base, a punching base and a blanking base are slidably arranged on the linear rail; shaping linear servo motor is installed to shaping base bottom, and punching linear servo motor is installed to the base bottom that punches, and blanking linear servo motor is installed to blanking base bottom, and forming mechanism sets up on the shaping base, and the mechanism that punches sets up on the base that punches, and blanking mechanism sets up on the blanking base.

As a further improvement of the invention, the forming structure comprises an upper forming die fixing platform, a lower forming die fixing platform and a forming transmission mechanism, wherein the forming transmission mechanism comprises a forming speed reducer, a forming spline main shaft, four forming stand columns, two groups of first cranks, two groups of first connecting rods, two groups of second cranks and two groups of second connecting rods; four forming stand columns are arranged on the frame, and an upper forming die fixing platform and a lower forming die fixing platform are arranged on the four forming stand columns in a one-to-one matching manner; the forming spline main shaft is rotationally arranged on the rack, and the forming speed reducer is arranged on the rack and connected with the forming spline main shaft and the forming servo motor; the first crank and the second crank are fixed on the forming spline spindle; one end of the first connecting rod is connected with the first crank through a joint bearing, and the other end of the first connecting rod is connected with the upper forming die fixing platform; one end of the second connecting rod is connected with the second crank through a joint bearing, and the other end of the second connecting rod is connected with the lower forming die fixing platform.

As a further improvement of the invention, the punching structure comprises a punching upper die fixing platform, a punching lower die fixing platform and a punching transmission mechanism, wherein the punching transmission mechanism comprises a punching speed reducer, a punching spline main shaft, a punching upright post, two groups of third cranks, two groups of third connecting rods, two groups of fourth cranks and two groups of fourth connecting rods; the punching upright is arranged on the frame, and the punching upper die fixing platform and the punching lower die fixing platform are arranged on the punching upright in a one-to-one matching manner; the punching spline main shaft is rotatably installed on the rack, the punching speed reducer is arranged on the rack and connected with the punching spline main shaft and the punching servo motor, and the fourth crank and the third crank are fixed on the punching spline main shaft; one end of a third connecting rod is connected with a third crank through a joint bearing, and the other end of the third connecting rod is connected with the punching upper die fixing platform; one end of a fourth connecting rod is connected with the fourth crank through a joint bearing, and the other end of the fourth connecting rod is connected with the punching lower die fixing platform.

As a further improvement of the invention, the blanking structure comprises a blanking upper die fixing platform, a blanking lower die fixing platform and a blanking transmission mechanism, wherein the blanking transmission mechanism comprises a blanking speed reducer, a blanking spline main shaft, a blanking upright post, two groups of fifth cranks, two groups of fifth connecting rods, two groups of sixth cranks and two groups of sixth connecting rods; the blanking stand column is arranged on the frame, and the blanking upper die fixing platform and the blanking lower die fixing platform are arranged on the blanking stand column in a one-to-one matching manner; the blanking spline main shaft is rotatably arranged on the rack, and the blanking speed reducer is arranged on the rack and connected with the blanking spline main shaft and the blanking servo motor; the sixth crank and the fifth crank are fixed on the blanking spline main shaft; one end of a fifth connecting rod is connected with the fifth crank through a joint bearing, and the other end of the fifth connecting rod is connected with the blanking upper die fixing platform; one end of a sixth connecting rod is connected with the sixth crank through a joint bearing, and the other end of the sixth connecting rod is connected with the blanking lower die fixing platform.

The punching servo motor drives the punching mechanism independently, the blanking servo motor drives the blanking mechanism independently, and the forming servo motor, the punching servo motor and the blanking servo motor respectively drive a station independently, so that the output force is prevented from being dispersed, and the situation that the force output by the motor is insufficient is avoided. The forming mechanism, the punching mechanism and the punching mechanism respectively and independently operate, and the mechanisms are not related to each other, so that the mechanism is convenient to maintain when a fault occurs.

Drawings

FIG. 1 is an overall block diagram of the present invention;

FIG. 2 is a structural view of a heating apparatus;

FIG. 3 is a structural view of a molding apparatus;

FIG. 4 is a view showing the structure of the punching apparatus;

fig. 5 is a structural view of the punching device.

Detailed Description

The invention will be further described in detail with reference to the following examples, which are given in the accompanying drawings.

Referring to fig. 1 to 5, the efficient and stable plastic molding machine of the embodiment includes a frame 1, a feeding mechanism 2, a material pulling and sheet material mechanism 3, a heating mechanism 4, a molding mechanism 5, a punching mechanism 6, a blanking mechanism 7, a stacking and discharging mechanism 8, and a waste material receiving mechanism 9, wherein the feeding mechanism 2 is arranged at the front end of the frame 1; the heating mechanism 4, the forming mechanism 5, the punching mechanism 6, the blanking mechanism 7, the stacking and discharging mechanism 8 and the waste collecting mechanism 9 are sequentially installed on the rack 1 backwards; the material pulling sheet mechanism 3 transversely penetrates through the heating mechanism 4, the forming mechanism 5, the punching mechanism 6, the blanking mechanism 7 and the stacking and discharging mechanism 8; the forming mechanism 5 comprises a forming servo motor 51 and a forming structure and is matched and connected with the rack 1; the punching mechanism 6 comprises a punching servo motor 61 and a punching structure and is matched and connected with the rack 1; the blanking mechanism 7 comprises a blanking servo motor 71 and a blanking structure, and is matched and connected with the frame 1.

When processing, shaping servo motor 51 drives forming mechanism alone, and punching servo motor 61 drives the mechanism of punching alone, and blanking servo motor 71 drives blanking mechanism alone, and shaping servo motor 51, punching servo motor 61 and blanking servo motor 71 drive a station alone respectively, avoid the power of output to be dispersed, avoid the not enough condition of power of motor output to take place. The forming mechanism, the punching mechanism and the blanking mechanism respectively and independently operate, the mechanisms are not related to each other, and the punching mechanism is convenient to maintain when a fault occurs.

As a specific embodiment of the improvement, the heating mechanism 4 comprises an upper heating support 42, a lower heating support 43, a telescopic cylinder 45 and two groups of heating bodies 41, wherein the telescopic direction is perpendicular to the moving direction of the plastic sheet; be provided with the same heating guide rail 44 of two sets of directions and telescopic cylinder 45 flexible direction on the frame 1, go up heating support 42 and lower heating support 43 and slide respectively and set up on heating guide rail 44, two sets of heating members 41 are installed respectively on last heating support 42 and lower heating support 43, it is connected with telescopic cylinder 45 movable one end to go up heating support 42 and lower heating support 43, telescopic cylinder 45's the other end is connected with frame 1, when equipment continuous operation, telescopic cylinder 45 promotes heating member 41 and moves to the vertical intermediate position of drawing material sheet mechanism 3, when equipment trouble or initial state down, heating member 41 breaks away from and draws material sheet mechanism 3. In addition, an off-current protection switch is added to prevent the heating of the sheet from being too high and generating defective products.

Through the steps, the plastic sheet is prevented from being heated for too long, the forming quality is reduced, and the plastic sheet can be prevented from being burnt out.

As a specific embodiment of the improvement, a linear rail 11 is installed on the frame 1, the linear rail 11 is horizontally arranged and extends in the same direction as the moving direction of the plastic sheet, and a forming base 52, a punching base 62 and a blanking base 72 are slidably installed on the linear rail 11; shaping linear servo motor 511 is installed to shaping base 52 bottom, and punching linear servo motor 611 is installed to punching base 62 bottom, and blanking linear servo motor 711 is installed to blanking base 72 bottom, and forming mechanism sets up on shaping base 52, and the mechanism that punches sets up on punching base 62, and the mechanism that punches sets up on blanking base 72.

When products with different sizes are processed, the distances among the forming mechanism, the punching mechanism and the blanking mechanism are respectively and accurately adjusted by the forming linear motor 511, the punching linear motor 611 and the blanking linear motor 711, so that the distances among the mechanisms are suitable for the processing requirement, the distance of the products on the plastic materials can be reduced, the utilization rate of the plastic materials is improved, and raw materials are saved.

As an improved specific embodiment, the forming structure includes an upper forming die fixing platform 53, a lower forming die fixing platform 54 and a forming transmission mechanism, the forming transmission mechanism includes a forming speed reducer 512, a forming spline spindle 55, four forming columns 56, two groups of first cranks 57, two groups of first connecting rods 58, two groups of second cranks 59 and two groups of second connecting rods 510; four forming upright columns 56 are arranged on the frame 1, and an upper forming die fixing platform 53 and a lower forming die fixing platform 54 are arranged on the four forming upright columns 56 in a one-to-one matching manner; the forming spline main shaft 55 is rotationally arranged on the rack 1, and the forming speed reducer 512 is arranged on the rack 1 and is connected with the forming spline main shaft 55 and the forming servo motor 51; the first crank 57 and the second crank 59 are fixed on the forming spline spindle 55; one end of the first connecting rod 58 is connected with the first crank 57 through a joint bearing, and the other end is connected with the upper molding die fixing platform 53; one end of the second link 510 is connected to the second crank 59 via a joint bearing, and the other end is connected to the lower mold fixing platform 54.

During molding, the molding dies are arranged on the upper molding die fixing platform 53 and the lower molding die fixing platform 54, the molding servo motor 51 drives the molding spline main shaft 55 to rotate, two groups of first cranks 57 and two groups of second cranks 59 to move simultaneously, and the first cranks 57 drive the first connecting rods 58 to move, so that the upper molding die fixing platform 53 is driven to lift; the second crank 59 drives the second connecting rod 510 to move, so as to drive the lower forming die fixing platform 54 to lift, so that the upper forming die fixing platform 53 and the lower forming die fixing platform 54 move towards or away from each other, and the die opening or closing action is completed. Through the steps, the mold opening and closing actions can be realized only by one molding motor 51, and the cost is low. And the reciprocating motion of the upper forming die fixing platform 53 and the lower forming die fixing platform 54 can be realized through the structural linkage of the first crank 57, the first connecting rod 58, the second crank 59 and the second connecting rod 510, and the reset structures are not required to be arranged on the upper forming die fixing platform 53 and the lower forming die fixing platform 54, so that the structures of the upper forming die fixing platform 53 and the lower forming die fixing platform 54 are simplified.

As an improved specific embodiment, the punching structure comprises a punching upper die fixing platform 63, a punching lower die fixing platform 64 and a punching transmission mechanism, wherein the punching transmission mechanism comprises a punching speed reducer 612, a punching spline spindle 65, a punching upright post 66, two groups of third cranks 67, two groups of third connecting rods 68, two groups of fourth cranks 69 and two groups of fourth connecting rods 610; the punching upright column 66 is arranged on the frame 1, and the punching upper die fixing platform 63 and the punching lower die fixing platform 64 are arranged on the punching upright column 66 in a one-to-one matching manner; the punching spline main shaft 65 is rotatably installed on the rack 1, the punching speed reducer 612 is arranged on the rack 1 and is connected with the punching spline main shaft 65 and the punching servo motor 61, and the fourth crank 69 and the third crank 67 are fixed on the punching spline main shaft 65; one end of a third connecting rod 68 is connected with a third crank 67 through a joint bearing, and the other end is connected with the punching upper die fixing platform 63; one end of the fourth connecting rod 610 is connected with the fourth crank 69 through a joint bearing, and the other end is connected with the lower punching die fixing platform 64.

During punching, the punching servo motor 61 drives the punching spline main shaft 65 to rotate, drives the two groups of third cranks 67 and the two groups of fourth cranks 69 to move simultaneously, and the third cranks 67 drive the third connecting rods 68 to move, so that the punching upper die fixing platform 63 is driven to lift; the fourth crank 69 drives the fourth connecting rod 610 to move, so as to drive the punching lower die fixing platform 64 to lift, so that the punching upper die fixing platform 63 and the punching lower die fixing platform 64 move towards or away from each other, and the die opening or die closing action is completed. Through the steps, the die opening and closing actions can be realized only by one punching motor 61, and the cost is low. And through the structural linkage of the third crank 67, the third connecting rod 68, the fourth crank 69 and the fourth connecting rod 610, the reciprocating motion of the punching upper die fixing platform 63 and the punching lower die fixing platform 64 can be realized, reset structures do not need to be arranged on the punching upper die fixing platform 63 and the punching lower die fixing platform 64, and the structures of the punching upper die fixing platform 63 and the punching lower die fixing platform 64 are simplified.

As a specific embodiment of the improvement, the blanking structure includes a blanking upper die fixing platform 73, a blanking lower die fixing platform 74 and a blanking transmission mechanism, and the blanking transmission mechanism includes a blanking reducer 712, a blanking spline spindle 75, a blanking upright post 76, two sets of fifth cranks 77, two sets of fifth connecting rods 78, two sets of sixth cranks 79 and two sets of sixth connecting rods 710; the blanking upright 76 is arranged on the frame 1, and the blanking upper die fixing platform 73 and the blanking lower die fixing platform 74 are arranged on the blanking upright 76 in a one-to-one fit manner; the blanking spline main shaft 75 is rotatably installed on the frame 1, and the blanking reducer 712 is arranged on the frame 1 and is connected with the blanking spline main shaft 75 and the blanking servo motor 71; a sixth crank 79 and a fifth crank 77 are fixed on the blanking spline main shaft 75; one end of a fifth connecting rod 78 is connected with a fifth crank 77 through a joint bearing, and the other end is connected with the blanking upper die fixing platform 73; one end of the sixth link 710 is connected to the sixth crank 79 via a joint bearing, and the other end is connected to the lower blanking die fixing table 74.

During blanking, the blanking servo motor 71 drives the blanking spline main shaft 75 to rotate, drives the two groups of fifth cranks 77 and the two groups of sixth cranks 79 to move simultaneously, and the fifth cranks 77 drives the fifth connecting rods 78 to move, so as to drive the blanking upper die fixing platform 73 to lift; the sixth crank 79 drives the sixth connecting rod 710 to move, so as to drive the blanking lower die fixing platform 74 to lift, so that the blanking upper die fixing platform 73 and the blanking lower die fixing platform 74 move towards or away from each other, and the die opening or die closing action is completed. Through the steps, the die opening and closing actions can be realized only by one blanking motor 71, and the cost is low. And the reciprocating motion of the upper blanking die fixing platform 73 and the lower blanking die fixing platform 74 can be realized through the structural linkage of the fifth crank 77, the fifth connecting rod 78, the sixth crank 79 and the sixth connecting rod 710, and reset structures are not required to be arranged on the upper blanking die fixing platform 73 and the lower blanking die fixing platform 74, so that the structures of the upper blanking die fixing platform 73 and the lower blanking die fixing platform 74 are simplified.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. The utility model provides a high-efficient stable plastic molding machine which characterized in that: the punching and blanking machine comprises a rack (1), a feeding mechanism (2), a material pulling sheet mechanism (3), a heating mechanism (4), a forming mechanism (5), a punching mechanism (6), a blanking mechanism (7), a stacking and discharging mechanism (8) and a waste collecting mechanism (9), wherein the feeding mechanism (2) is arranged at the front end of the rack (1); the heating mechanism (4), the forming mechanism (5), the punching mechanism (6), the blanking mechanism (7), the stacking and discharging mechanism (8) and the waste collecting mechanism (9) are sequentially arranged on the rack (1) backwards; the material pulling sheet mechanism (3) transversely penetrates through the heating mechanism (4), the forming mechanism (5), the punching mechanism (6), the blanking mechanism (7) and the stacking and discharging mechanism (8); the forming mechanism (5) comprises a forming servo motor (51) and a forming structure and is connected with the rack (1) in a matching way; the punching mechanism (6) comprises a punching servo motor (61) and a punching structure and is connected with the rack (1) in a matching way; the blanking mechanism (7) comprises a blanking servo motor (71) and a blanking structure and is connected with the rack (1) in a matching way;

the forming structure comprises an upper forming die fixing platform (53), a lower forming die fixing platform (54) and a forming transmission mechanism, wherein the forming transmission mechanism comprises a forming speed reducer (512), a forming spline main shaft (55), four forming stand columns (56), two groups of first cranks (57), two groups of first connecting rods (58), two groups of second cranks (59) and two groups of second connecting rods (510); the four forming upright columns (56) are arranged on the rack (1), and the upper forming die fixing platform (53) and the lower forming die fixing platform (54) are arranged on the four forming upright columns (56) in a one-to-one matching manner; the forming spline main shaft (55) is rotationally arranged on the rack (1), and the forming speed reducer (512) is arranged on the rack (1) and is connected with the forming spline main shaft (55) and the forming servo motor (51); the first crank (57) and the second crank (59) are fixed on the forming spline spindle (55); one end of the first connecting rod (58) is connected with the first crank (57) through a joint bearing, and the other end of the first connecting rod is connected with the upper forming die fixing platform (53); one end of the second connecting rod (510) is connected with the second crank (59) through a joint bearing, and the other end of the second connecting rod is connected with the lower molding die fixing platform (54).

2. An efficient and stable plastic molding machine as defined in claim 1, wherein: the heating mechanism (4) comprises an upper heating support (42), a lower heating support (43), a telescopic cylinder (45) and two groups of heating bodies (41), and the telescopic direction is vertical to the moving direction of the plastic sheet; the heating device is characterized in that two groups of heating guide rails (44) with the same direction as the telescopic direction of a telescopic cylinder (45) are arranged on the rack (1), an upper heating support (42) and a lower heating support (43) are arranged on the heating guide rails (44) in a sliding mode respectively, the two groups of heating bodies (41) are arranged on the upper heating support (42) and the lower heating support (43) respectively, the upper heating support (42) and the lower heating support (43) are connected with one movable end of the telescopic cylinder (45), the other end of the telescopic cylinder (45) is connected with the rack (1), when the device works continuously, the telescopic cylinder (45) pushes the heating bodies (41) to move to the longitudinal middle position of the material pulling sheet mechanism (3), and when the device is in a failure or initial state, the heating bodies (41) are separated from the material pulling sheet mechanism (3).

3. An efficient and stable plastic molding machine as defined in claim 1, wherein: a linear rail (11) is installed on the rack (1), the linear rail (11) is horizontally arranged, the extending direction of the linear rail (11) is the same as the moving direction of the plastic sheet, and a forming base (52), a punching base (62) and a blanking base (72) are slidably installed on the linear rail (11); shaping sharp servo motor (511) is installed to shaping base (52) bottom, punching straight line servo motor (611) is installed to punching base (62) bottom, blanking straight line servo motor (711) is installed to blanking base (72) bottom, forming mechanism sets up on shaping base (52), punching mechanism sets up on punching base (62), punching mechanism sets up on blanking base (72).

4. An efficient and stable plastic molding machine as defined in claim 1, wherein: the punching structure comprises a punching upper die fixing platform (63), a punching lower die fixing platform (64) and a punching transmission mechanism, wherein the punching transmission mechanism comprises a punching speed reducer (612), a punching spline main shaft (65), a punching upright post (66), two groups of third cranks (67), two groups of third connecting rods (68), two groups of fourth cranks (69) and two groups of fourth connecting rods (610); the punching upright post (66) is arranged on the rack (1), and the punching upper die fixing platform (63) and the punching lower die fixing platform (64) are arranged on the punching upright post (66) in a one-to-one matching manner; the punching spline main shaft (65) is rotatably mounted on the rack (1), the punching speed reducer (612) is arranged on the rack (1) and is connected with the punching spline main shaft (65) and the punching servo motor (61), and the fourth crank (69) and the third crank (67) are fixed on the punching spline main shaft (65); one end of the third connecting rod (68) is connected with the third crank (67) through a joint bearing, and the other end of the third connecting rod is connected with the punching upper die fixing platform (63); one end of the fourth connecting rod (610) is connected with the fourth crank (69) through a joint bearing, and the other end of the fourth connecting rod is connected with the punching lower die fixing platform (64).

5. An efficient and stable plastic molding machine as defined in claim 1, wherein: the blanking structure comprises a blanking upper die fixing platform (73), a blanking lower die fixing platform (74) and a blanking transmission mechanism, wherein the blanking transmission mechanism comprises a blanking speed reducer (712), a blanking spline main shaft (75), a blanking upright post (76), two groups of fifth cranks (77), two groups of fifth connecting rods (78), two groups of sixth cranks (79) and two groups of sixth connecting rods (710); the blanking upright post (76) is arranged on the rack (1), and the blanking upper die fixing platform (73) and the blanking lower die fixing platform (74) are arranged on the blanking upright post (76) in a one-to-one matching manner; the blanking spline main shaft (75) is rotatably installed on the rack (1), and the blanking speed reducer (712) is arranged on the rack (1) and is connected with the blanking spline main shaft (75) and the blanking servo motor (71); the sixth crank (79) and the fifth crank (77) are fixed on the blanking spline main shaft (75); one end of the fifth connecting rod (78) is connected with a fifth crank (77) through a joint bearing, and the other end of the fifth connecting rod is connected with a blanking upper die fixing platform (73); one end of the sixth connecting rod (710) is connected with the sixth crank (79) through a joint bearing, and the other end of the sixth connecting rod is connected with the blanking lower die fixing platform (74).