CN114682693A

CN114682693A - Mold assembly and method for closing mold assembly

Info

Publication number: CN114682693A
Application number: CN202210352502.5A
Authority: CN
Inventors: 张继发
Original assignee: Chuzhou Xinjiacheng Mould Manufacturing Co ltd
Current assignee: Chuzhou Xinjiacheng Mould Manufacturing Co ltd
Priority date: 2022-04-05
Filing date: 2022-04-05
Publication date: 2022-07-01
Anticipated expiration: 2042-04-05
Also published as: CN114682693B

Abstract

The invention discloses a die assembly which comprises a die base and a die frame, wherein the die frame is welded on the die base, hydraulic push rods are fixed on two sides inside the die base, a die mounting groove and transmission grooves are formed in the die frame, the transmission grooves are located on two sides of the die mounting groove, air cylinders are fixed on two sides of the top of the die frame, a top die and a bottom die are arranged inside the die mounting groove, and the top die and the bottom die are both in a triangular structure. Through the design of the top die and the bottom die of the triangular structure, the plastic dies of corresponding types can be installed on the punching surfaces of the three die bodies of the top die and the bottom die, the motors on different transmission blocks can respectively drive the rotation of the top die and the bottom die, the exchange between different plastic dies is realized, the automatic switching of different punching types is effectively realized, the speed is high, and the efficiency is high.

Description

Mold assembly and method for closing mold assembly

Technical Field

The invention relates to the technical field of die assemblies, in particular to a stamping die assembly and a closing method of the stamping die assembly.

Background

The mould is a tool for making shaped articles, the tool is composed of various parts, different moulds are composed of different parts, and the processing of the appearance of the articles is realized mainly by changing the physical state of the shaped materials.

At present, when different types of stamping are carried out on a stamping die, the replacement mode of the die is mainly divided into the following two modes, 1. because the shape and the structure of the traditional stamping die are limited, the plastic dies on the top die and the bottom die of the stamping die need to be replaced manually respectively. 2. Change the mold processing of different grade type wholly, because it is fixed that multiunit locking Assembly or screw mostly between mould and top mould and the die block, relate to locking Assembly and screw size, structure and the difference of kind, when the manual work is changed, need be with the help of the assembly and disassembly tools of multiple difference, the flow is loaded down with trivial details, wastes time and energy, because the mould includes mould body and mould control assembly, multiple different grade type stamping die's purchase can certainly lead to the fact the too high problem of expenditure cost. Accordingly, we propose herein a mold assembly and a method of closing a mold assembly.

Disclosure of Invention

The invention provides a die assembly and a closing method of the die assembly aiming at the defects in the background art, and effectively solves the problems of complicated flow, time and labor waste caused by manual replacement of the traditional stamping die and the problem of overhigh expenditure cost caused by purchasing a plurality of groups of stamping dies of different types.

The invention adopts a modified technical scheme to solve the technical defects, and the die assembly comprises a die base and a die frame, wherein the die frame is welded on the die base, hydraulic push rods are fixed on two sides inside the die base, a die mounting groove and a transmission groove are arranged on the die frame, the transmission groove is positioned on two sides of the die mounting groove, air cylinders are fixed on two sides of the top of the die frame, a top die and a bottom die are arranged inside the die mounting groove, the top die and the bottom die are both in a triangular structure, a first rotating connecting disc and a second rotating connecting disc are respectively welded on two sides of the top die and the bottom die, stamping seats are respectively welded on stamping surfaces of three-end die bodies of the top die, first plastic dies are arranged on the stamping seats, stamping grooves are respectively arranged on stamping surfaces of three-end die bodies of the bottom die, and a second plastic die is arranged inside the stamping grooves, the groove plates at the two sides of the transmission groove are respectively provided with a first sliding groove and a second sliding groove, the transmission groove is internally embedded with a first transmission block and a second transmission block, a first sliding block and a second sliding block are respectively arranged at two sides of the first transmission block and the second transmission block, the first sliding blocks of the first transmission block and the second transmission block are respectively fixed with a motor, the second sliding blocks of the first transmission block and the second transmission block are both provided with rotating assemblies, the rotating assemblies on the second transmission block are connected with a first rotating connecting disc at the side end of the top die, the motor transmission end on the second transmission block is connected with the rotating component on the second transmission block, the rotating component on the first transmission block is connected with the second rotating connecting disc at the side end of the bottom die, the motor transmission end on the first transmission block is connected with the rotating assembly on the first transmission block, and the first transmission block and the second transmission block are respectively locked and fixed with the pushing end of the hydraulic pushing rod and the pushing end of the air cylinder.

As a further preferable mode of the present invention, the top die and the bottom die have the same size and structure, the first shaping dies on the stamping surface of the three-end die body of the top die have different structures, the second shaping dies on the stamping surface of the three-end die body of the bottom die have the same structure as the first shaping dies on the stamping surface of the three-end die body of the top die, and the first shaping dies and the second shaping dies are fixed on the stamping seat and the stamping groove by screws, respectively.

As a further preferable mode of the present invention, the first rotating connecting discs on both sides of the top die and the second rotating connecting discs on both sides of the bottom die have the same size and structure, each of the first rotating connecting discs and the second rotating connecting discs is composed of a welding disc and a limit ring buckle, the limit ring buckle is welded on the welding disc, and first fixing holes are distributed on the welding disc.

As a further preferable mode of the present invention, the rotating assemblies on the first transmission block and the second transmission block have the same structure, each rotating assembly includes a rotating connection pad and a fixed disk, the rotating connection pads are respectively welded on the second sliding blocks of the first transmission block and the second transmission block, the rotating connection pads are provided with annular grooves, the annular grooves are in embedded connection with the limit ring fasteners, the fixed disk is welded with a rotating shaft, the rotating shaft respectively penetrates through the first transmission block and the second transmission block to be connected with the transmission end of the motor on the first sliding block, second fixing holes are distributed on the disk body of the fixed disk, and the second fixing holes are the same as the first fixing holes in size, number and position.

As a further preferable mode of the present invention, the first slider and the second slider are respectively welded to two sides of the first transmission block and the second transmission block, the two sides of the first slider and the second slider are respectively welded with a limiting block, two sides of the first sliding groove and the second sliding groove are respectively provided with a limiting slideway, and the limiting blocks at two sides of the first slider and the second slider are respectively connected with the second sliding groove and the limiting slideways at two sides of the first sliding groove in an embedded manner.

In a further preferred aspect of the present invention, the closing method comprises the steps of:

s1, die installation: respectively installing a first shaping die and a second shaping die of three commonly used dies on a punching seat and a punching groove of punching surfaces of three-end die bodies of a top die and a bottom die sequentially through screws;

s2, die adjustment: according to the type of the current pre-stamping, the shaping dies corresponding to the type of the pre-stamping on the top die and the bottom die are required to be adjusted to the stamping position, the bottom die is moved out of the limiting groove through a hydraulic push rod, motors on the first transmission block and the second transmission block are respectively started, and the motors drive the top die and the bottom die to rotate through the rotating assemblies respectively, so that the position adjustment can be realized;

s3: closing and punching: the stamping material is placed in a second shaping die of the bottom die, the cylinders on two sides of the top of the die frame are started, and the cylinders drive a second transmission block to move in the transmission groove, so that the top die is moved, and the stamping material in the second shaping die is shaped through the first shaping die after the top die and the bottom die are closed;

s4: separating and taking materials: and after the punching is finished, starting the air cylinder again, separating the top die from the bottom die, taking out the molding material, cleaning corners, and performing secondary punching.

The invention has the following beneficial effects:

through the design of the top mould and the die block of triangle-shaped structure, can install the mould that moulds of corresponding type on the three die body punching press face of top mould and die block, through the motor on the different transmission blocks, can drive the rotation of top mould and die block respectively, realize the change between the different moulds, effectively realized the automatic switch-over of different punching press types, fast, efficient, solved manual operation and caused the mould that the flow is loaded down with trivial details and purchase the multiunit different grade type and cause problem with high costs.

Drawings

FIG. 1 is a schematic view of the overall structure of the mold of the present invention;

FIG. 2 is a schematic view of the top mold structure of the present invention;

FIG. 3 is a schematic view of a bottom mold according to the present invention;

FIG. 4 is a schematic view of the structure of the transmission block of the present invention;

FIG. 5 is an enlarged view of the structure at A of FIG. 4 according to the present invention;

FIG. 6 is a schematic view of the mold base structure of the present invention.

In the figure, 1-a mold base, 2-a mold frame, 3-a mold installation groove, 4-a transmission groove, 5-a top mold, 6-a bottom mold, 7-a first transmission block, 8-a second transmission block, 9-a limit groove, 10-a cylinder, 11-a first sliding groove, 12-a second sliding groove, 13-a punching seat, 14-a first shaping mold, 15-a first rotary joint disc, 16-a limit ring buckle, 17-a first fixing hole, 18-a punching groove, 19-a second shaping mold, 20-a second rotary joint disc, 21-a first sliding block, 22-a second sliding block, 23-a motor, 24-a limit block, 25-a rotating component, 26-a rotary joint disc, 27-an annular groove, 28-a fixing disc, 29-a second fixing hole, 30-rotating shaft, 31-hydraulic pushing rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a technical scheme that: a die assembly comprises a die base 1 and a die frame 2, wherein the die frame 2 is welded on the die base 1, hydraulic push rods 31 are fixed on two sides of the interior of the die base 1, a die mounting groove 3 and a transmission groove 4 are arranged on the die frame 2, the transmission groove 4 is positioned on two sides of the die mounting groove 3, cylinders 10 are fixed on two sides of the top of the die frame 2, a top die 5 and a bottom die 6 are arranged in the die mounting groove 3, the top die 5 and the bottom die 6 are both in a triangular structure, a first rotating connecting disc 15 and a second rotating connecting disc 20 are respectively welded on two sides of the top die 5 and the bottom die 6, stamping seats 13 are welded on stamping surfaces of three-end dies of the top die 5, first plastic dies 14 are arranged on the stamping seats 13, stamping grooves 18 are arranged on stamping surfaces of three-end dies of the bottom die 6, and second plastic dies 19 are arranged in the stamping grooves 18, the groove plates on two sides of the transmission groove 4 are respectively provided with a first sliding groove 11 and a second sliding groove 12, the transmission groove 4 is embedded with a first transmission block 7 and a second transmission block 8, two sides of the first transmission block 7 and the second transmission block 8 are respectively provided with a first sliding block 21 and a second sliding block 22, the first sliding blocks 21 of the first transmission block 7 and the second transmission block 8 are respectively fixed with a motor 23, the second sliding blocks 22 of the first transmission block 7 and the second transmission block 8 are respectively provided with a rotating component 25, the rotating component 25 on the second transmission block 8 is connected with a first rotating connecting disc 15 on the side end of the top die 5, the driving end of the motor 23 on the second transmission block 8 is connected with the rotating component 25 on the second transmission block 8, the rotating component 25 on the first transmission block 7 is connected with a second rotating connecting disc 20 on the bottom die 6, the side end of the motor 23 on the first transmission block 7 is connected with the rotating component 25 on the first transmission block 7, the first transmission block 7 and the second transmission block 8 are respectively locked and fixed with the pushing end of the hydraulic pushing rod 31 and the pushing end of the air cylinder 10.

Top mould

5 and 6 sizes of die block, the structure are the same, first shaping mould 14 on the 5 three-terminal die body stamping surface of top mould is the die body of isostructure, second shaping mould 19 on the 6 three-terminal die body stamping surface of die block corresponds unanimously with first shaping mould 14 structure on the 5 three-terminal die body stamping surface of top mould respectively, first shaping mould 14 and second shaping mould 19 are fixed in respectively on punching press seat 13 and punching press groove 18 through the screw, it has the locking hole to equally divide cloth on punching press seat 13 and the punching press groove 18, and top mould 5 and die block 6 of equidimension have guaranteed the uniformity of mould structure, and the design of three-terminal die body stamping surface can freely change the stamping structure to different, changes fastly, and is efficient, has avoided artifical dismouting to cause the loaded down with trivial details problem of flow.

The first rotation of top mould 5 both sides links up dish 15 and the second rotation of die block 6 both sides links up dish 20 size, the same structure, first rotation links up dish 15 and second rotation and links up dish 20 and constitute by welding dish and spacing latch closure 16, spacing latch closure 16 welds on the welding dish, it has first fixed orifices 17 to distribute on the welding dish, rotates and links up dish 20 and mainly provides the transmission for the rotation of top mould 5 and die block 6 and connect, and spacing latch closure 16 provides spacing effect for rotating assembly 25's connection and transmission, guarantees the stability of top mould 5 and die block 6 transmission in-process and the fastness that top mould 5 and die block 6 and rotating assembly 25 are connected.

The structure of the rotating component 25 on the first transmission block 7 and the second transmission block 8 is the same, the rotating component 25 is composed of a rotating connection disc 26 and a fixed disc 28, the rotating connection disc 26 is respectively welded on the second sliding blocks 22 of the first transmission block 7 and the second transmission block 8, an annular groove 27 is arranged on the rotating connection disc 26, the annular groove 27 is connected with the limit ring buckle 16 in an embedded mode, a rotating shaft 30 is welded on the fixed disc 28, the rotating shaft 30 respectively penetrates through the first transmission block 7 and the second transmission block 8 and is connected with the transmission end of the motor 23 on the first sliding block 21, a shaft coupling is connected between the transmission end of the motor 23 and the rotating shaft 30, second fixing holes 29 are distributed on the disc body of the fixed disc 28, the second fixing holes 29 correspond to the first fixing holes 17 in size and number, and the positions, and the rotating component 25 mainly plays a transmission effect by means of the motor 23, the motor 23 drives the rotating assembly 25 to realize transmission of the top die 5 and the bottom die 6, so that the top die 5 and the bottom die 6 can rotate, and the purpose of exchanging different types of molding dies is achieved.

First slider 21 and second slider 22 weld respectively in the both sides of first drive block 7 and second drive block 8, stopper 24 has all been welded in the both sides of first slider 21 and second slider 22,

first spout

11 and 12 both sides of second spout all are equipped with spacing slide, stopper 24 of

first slider

21 and 22 both sides of second slider is connected with the spacing slide gomphosis of

second spout

12 and 11 both sides of first spout respectively, and first slider 21 and second slider 22 provide the effect of sliding support for the drive block, have also realized motor 23 and rotating assembly 25's linking simultaneously, have guaranteed that the drive block drives the spacing removal of top mould 5 and die block 6 respectively in, have also realized the transmission of motor 23 to top mould 5 and die block 6.

The steps of the method of closing the mold assembly of the present invention are as follows:

s1, die installation: before stamping, a first plastic die 14 and a second plastic die 19 of three commonly used dies are required to be sequentially installed on a stamping seat 13 and a stamping groove 18 of stamping surfaces of three end dies of a top die 5 and a bottom die 6 through screws respectively, in the installation and fixation process, the first plastic die 14 and the second plastic die 19 of three different types can be respectively installed on any stamping surface of the three end dies of the top die 5 and the bottom die 6, extension plates are welded on two sides of the first plastic die 14 and the second plastic die 19, the extension plates directly penetrate through locking holes in the extension plates through screws and are locked and fixed with locking holes in the stamping surfaces of the dies, and the first plastic die 14 and the second plastic die 19 are correspondingly processed and manufactured according to the structure and the fixing mode of the die;

s2, die adjustment: according to the type of the current pre-stamping, the shaping dies corresponding to the pre-stamping type on the top die 5 and the bottom die 6 are required to be adjusted to the stamping position, firstly, the position of the top die 5 is adjusted, when the adjustment is performed, the motor 23 on the second transmission block 8 is respectively started, the rotation component 25 is driven by the motor 23 to realize the rotation of the top die 5, the corresponding first shaping die 14 on the top die 5 is adjusted to the stamping position, then, the position of the bottom die 6 is adjusted, when the adjustment is performed, the hydraulic push rod 31 in the die base 1 is started, the hydraulic push rod 31 drives the first transmission block 7 to displace, so that the distance between the bottom die 6 and the limiting groove 9 is kept at 15-20cm, the motor 23 on the first transmission block 7 is respectively started, the motor 23 on the first transmission block 7 drives the bottom die 6 to rotate through the rotation component 25, so that the corresponding second shaping die 19 on the bottom die 6 is adjusted to the stamping position, at the moment, the first shaping die 14 on the top die 5 corresponds to the second shaping die 19 on the bottom die 6 in position, and finally the triangular end of the bottom die 6 is received into the limiting groove 9 through the hydraulic pushing rod 31 for limiting, the types of the motors 23 adopted on the first transmission block 7 and the second transmission block 8 are YS6314, the types of the hydraulic pushing rods 31 on the two sides inside the die base 1 are DYT (B), the motors 23 and the hydraulic pushing rods 31 are integrally controlled through the control end of the die, and the main board in the control end can adopt a GAMX-2007-T type main board or a GAMX-2014H type main board;

s3: closing and punching: the punching material is placed in a second plastic die 19 of a bottom die 6, the cylinders 10 on two sides of the top of the die frame 2 are started, the cylinders 10 drive a second transmission block 8 to move in a transmission groove 4, so that the top die 5 is moved, after the top die 5 and the bottom die 6 are closed, a punching seat 13 on the top die 5 firstly enters a punching groove 18 of the bottom die 6 to realize the limiting embedding between die bodies, the embedded top die 5 and the bottom die 6 drive a first plastic die 14 to shape the punching material in the second plastic die 19 through the impact force generated by the cylinders 10, the first punching can be finished, the types of the cylinders 10 on two sides of the top of the die frame 2 are DGSL-25-80-Y3A, and the cylinders 10 are also subjected to integrated control through a control end in S2;

s4: separating and taking materials: after the punching press is accomplished, cylinder 10 is restarted, with top mould 5 and die block 6 separation, take out forming material, the clearance corner, carry out the secondary punching press, if the punching press of secondary punching press is the punching press of different grade type, need to change first plastic mould 14 and second plastic mould 19 on top mould 5 and the die block 6, the process of changing, the flow the same with above-mentioned S2, after changing the plastic mould, place the material in second plastic mould 19, drive top mould 5 through cylinder 10, realize moulding the punching material on second plastic mould 19 through first plastic mould 14.

In summary, the die of the invention can respectively perform different types of stamping on the same die, thereby achieving the effect of one die with multiple purposes, and can achieve the switching of different stamping surfaces and the automatic stamping control of the die by respectively controlling the electronic element and the mechanical element through the control end, thereby enhancing the functionality and the practicability of the die, reducing the expenditure of manpower, and simultaneously reducing the operation cost of enterprises.

Example 1

S1, disassembling the die: the top die and the bottom die are disassembled through the external tools, and during disassembling, different types of locking assemblies and screws on the shaping dies are manually disassembled through a plurality of groups of external tools of different types;

s2, installing a die; respectively installing and fixing corresponding shaping dies on a top die and a bottom die through an external tool, respectively placing the shaping dies on the top die and the bottom die during installation, respectively and manually installing different types of locking assemblies and screws on the shaping dies by means of the external tool, wherein according to S1 and S2, the time for use is about 20-25min if one person replaces the shaping dies, and the time for use is about 10-14min if two persons replace the shaping dies of the top die and the bottom die at the same time;

s3, closing the punch: the stamping material is placed on a shaping die of a bottom die, a top die is driven by a cylinder, and shaping is realized by means of stamping force after the shaping die on the top die is contacted with the stamping material on the bottom die;

s4, separating and taking: after the shaping is completed, the top die is driven to reset through the air cylinder, the shaped material is taken out, and the rim charge is cleaned.

Example 2

S1, replacing the die: selecting a mould with a matched plastic mould and punching type, connecting the electronic element on the mould and connecting the control end with an external power supply, wherein the connection of the electronic element and the power connection of the control end is about 1-2min, and can be completed by only one person;

s2, closing the punch: the stamping material is placed on the shaping die of the bottom die, the top die is driven by the air cylinder, and the shaping die on the top die is in contact with the stamping material on the bottom die, so that the shaping is realized by means of the stamping force;

s3, separating and taking: after the shaping is completed, the top die is driven to reset through the air cylinder, the shaped material is taken out, and the rim charge is cleaned.

Example 3

S1, die adjustment: according to the type of the current pre-stamping, the shaping dies corresponding to the type of the pre-stamping on the top die 5 and the bottom die 6 are required to be adjusted to stamping positions, the bottom die 6 is moved out of the limiting groove 9 through the hydraulic push rod 31, the motors 23 on the first transmission block 7 and the second transmission block 8 are respectively started, the motors 23 respectively drive the top die 5 and the bottom die 6 to rotate through the rotating assemblies 25, the position adjustment can be realized, the whole process is about 3-5min in use, and the operation can be completed only by one person through a control end;

s2, closed stamping: the stamping material is placed on a shaping die of a bottom die 6, a top die 5 is driven by a cylinder 10, and shaping is realized by means of stamping force after the shaping die on the top die 5 is contacted with the stamping material on the bottom die 6;

s3, separating and taking: after the shaping is finished, the air cylinder 10 drives the top die to reset, the shaped material is taken out, and the rim charge is cleaned.

In the above embodiments 1 to 3, three modes of manual replacement of the plastic mold, replacement of the entire mold, and automatic rotary replacement of the plastic mold are respectively adopted, and the following table shows the changes of the replacement time, the number of people involved, and the replacement cost of the three different replacement modes.

It is obvious that, through the table, under the condition of keeping the cost unchanged, the time used by one person and two persons in the first embodiment is far longer than that of the second embodiment and the third embodiment, and under the condition of keeping the same number of persons in the second embodiment and the third embodiment, the replacement cost of the second embodiment is higher than that of the first embodiment, but the replacement time of the third embodiment is slightly longer than that of the second embodiment and is between the three embodiments, and the third embodiment is the best option under the condition of keeping the number of persons and the cost unchanged.

While there have been shown and described what are at present considered to be the basic principles and essential features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The mold assembly is characterized by comprising a mold base (1) and a mold frame (2), wherein the mold frame (2) is welded on the mold base (1), hydraulic push rods (31) are fixed on two sides of the interior of the mold base (1), a mold mounting groove (3) and a transmission groove (4) are arranged on the mold frame (2), the transmission groove (4) is located on two sides of the mold mounting groove (3), cylinders (10) are fixed on two sides of the top of the mold frame (2), and a top mold (5) and a bottom mold (6) are arranged in the mold mounting groove (3);

the stamping die comprises a top die (5), a bottom die (6) and stamping seats (13), wherein the top die (5) and the bottom die (6) are of triangular structures, a first rotating connecting disc (15) and a second rotating connecting disc (20) are welded on two sides of the top die (5) and the bottom die (6) respectively, the stamping surfaces of three end die bodies of the top die (5) are welded with the stamping seats (13), the stamping seats (13) are provided with first shaping dies (14), the stamping surfaces of the three end die bodies of the bottom die (6) are provided with stamping grooves (18), and second shaping dies (19) are arranged in the stamping grooves (18);

a first sliding groove (11) and a second sliding groove (12) are respectively formed in the groove plates on the two sides of the transmission groove (4), a first transmission block (7) and a second transmission block (8) are embedded in the transmission groove (4), and a first sliding block (21) and a second sliding block (22) are respectively arranged on the two sides of the first transmission block (7) and the second transmission block (8);

all be fixed with motor (23) on first slider (21) of first drive block (7) and second drive block (8), all be equipped with rotating assembly (25) on second slider (22) of first drive block (7) and second drive block (8), rotating assembly (25) on second drive block (8) link up with first rotation of top mould (5) side links up in the dish (15), motor (23) drive end on second drive block (8) is connected with rotating assembly (25) on second drive block (8), rotating assembly (25) on first drive block (7) rotate with the second of die block (6) side and link up in the dish (20), motor (23) drive end on first drive block (7) is connected with rotating assembly (25) on first drive block (7), first drive block (7) and second drive block (8) respectively with the promotion pole (31) the promotion end of hydraulic pressure cylinder (31) and the promotion end (10) of locking end (10) are connected .

2. A die assembly according to claim 1, wherein the top die (5) and the bottom die (6) are identical in size and structure, the first plastic die (14) on the stamping surface of the three-end die body of the top die (5) is a die body with different structures, the second plastic die (19) on the stamping surface of the three-end die body of the bottom die (6) is respectively corresponding to the first plastic die (14) on the stamping surface of the three-end die body of the top die (5), and the first plastic die (14) and the second plastic die (19) are respectively fixed on the stamping seat (13) and the stamping groove (18) through screws.

3. The die assembly according to claim 1, characterized in that the first rotary joint disk (15) on both sides of the top die (5) and the second rotary joint disk (20) on both sides of the bottom die (6) are the same in size and structure, the first rotary joint disk (15) and the second rotary joint disk (20) are both composed of a welding disk and a limit ring fastener (16), the limit ring fastener (16) is welded on the welding disk, and the welding disk is distributed with first fixing holes (17).

4. The mold assembly according to claim 1, wherein the structures of the rotating assemblies (25) on the first transmission block (7) and the second transmission block (8) are the same, the rotating assemblies (25) comprise a rotating connecting disc (26) and a fixed disc (28), the rotating connecting disc (26) is welded on the second sliding block (22) of the first transmission block (7) and the second transmission block (8) respectively, an annular groove (27) is arranged on the rotating connecting disc (26), the annular groove (27) is connected with the limit ring buckle (16) in an embedding manner, a rotating shaft (30) is welded on the fixed disc (28), the rotating shaft (30) penetrates through the first transmission block (7) and the second transmission block (8) respectively and is connected with the transmission end of the motor (23) on the first sliding block (21), and second fixing holes (29) are distributed on the disc body of the fixed disc (28), the second fixing holes (29) are the same as the first fixing holes (17) in size and number and correspond to the first fixing holes in position.

5. The mold assembly according to claim 1, wherein the first slider (21) and the second slider (22) are welded to two sides of the first transmission block (7) and the second transmission block (8) respectively, the two sides of the first slider (21) and the second slider (22) are welded with limit blocks (24), two sides of the first sliding chute (11) and the second sliding chute (12) are provided with limit slideways, and the limit blocks (24) on two sides of the first slider (21) and the second slider (22) are connected with the second sliding chute (12) and the limit slideways on two sides of the first sliding chute (11) in an embedded manner respectively.

6. Method for closing a mould assembly according to claims 1-5, characterised in that the steps of the closing method are as follows:

s1, die installation: a first plastic mould (14) and a second plastic mould (19) of three common moulds are respectively arranged on a stamping seat (13) and a stamping groove (18) of the stamping surfaces of three end mould bodies of a top mould (5) and a bottom mould (6) through screws in sequence;

s2, die adjustment: according to the type of the current pre-stamping, the shaping dies corresponding to the type of the pre-stamping on the top die (5) and the bottom die (6) are required to be adjusted to stamping positions, the bottom die (6) is moved out of the limiting groove (9) through the hydraulic push rod (31), the motors (23) on the first transmission block (7) and the second transmission block (8) are respectively started, and the motors (23) respectively drive the top die (5) and the bottom die (6) to rotate through the rotating assemblies (25), so that the position adjustment can be realized;

s3: closing and punching: the stamping material is placed in a second molding die (19) of the bottom die (6), the cylinders (10) on the two sides of the top of the die frame (2) are started, the cylinders (10) drive a second transmission block (8) to move in the transmission groove (4), so that the top die (5) is moved, and after the top die (5) and the bottom die (6) are closed, the first molding die (14) molds the stamping material in the second molding die (19);

s4: separating and taking materials: and after the punching is finished, the air cylinder (10) is started again, the top die (5) is separated from the bottom die (6), the forming material is taken out, corners are cleaned, and secondary punching is carried out.