A reverse precision cutting die and method for high-gloss metal decorative parts for vehicles

Abstract

The present invention relates to a reverse finishing die and method for high-gloss metal decorative parts for vehicles, comprising an upper die seat, a lower die seat, a material pressing positioning mechanism and a reverse bevel mechanism, wherein the material pressing positioning mechanism comprises an upper die fixing seat fixed to the lower side of the upper die seat and a lower die fixing seat fixed to the lower die seat, a lower die core for supporting decorative parts is installed on the upper side of the lower die fixing seat, a material pressing seat is installed on the lower side of the upper die fixing seat, a material pressing plate for pressing decorative parts is installed on the lower side of the material pressing seat, and a cutter is provided on the rear side of the lower die core, which is controlled to rise by the reverse bevel mechanism to punch the end of the decorative part. The reverse finishing die for high-gloss metal decorative parts for vehicles of the present invention is reasonably designed, optimizes the die structure, improves the overall service life of the die, avoids the phenomenon of line breakage and delays in the production period during mass production, ensures the mass production rate of the product, and changes the punching method, which can reduce or even avoid the occurrence of burrs in the punching process of the product, and improves the appearance quality of the product.

Description

Technical Field

[0001] The present invention relates to a reverse fine cutting die and method for a high-gloss metal automotive decorative part. Background Art

[0002] The cross-section of a high-gloss metal automotive decorative part is arched. Currently, the fine cutting dies for the ends of high-gloss metal automotive decorative parts all adopt a structure that punches the ends from top to bottom. During the punching process, the product is fixed and pressed firmly by a blank holder and a lower die core. Using the lower die core and the cutting tool as the cutting edges, the cutting tool is then driven to punch the product end from top to bottom to achieve the fine cutting effect of the product end. Since the side wall height of the product cannot be guaranteed to reach the digital model size during the actual die adjustment process, the lower die core needs to be recessed at both sides of the product end. This recess will cause burrs and surface light change phenomena on both sides of the product end during the punching process, and it requires the die adjuster to perform multiple rounds of repair and fitting to solve the product appearance problem. The structure of the lower die core supporting the product is relatively weak, which easily causes the cutting edges of the cutting tool and the lower die core to crack, resulting in product breakage during production and affecting the mass production rate of the product. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a reverse fine cutting die and method for a high-gloss metal automotive decorative part, which optimizes the die structure, improves the overall service life of the die, and ensures the mass production rate of the product.

[0004] The present invention is realized by the following scheme: A reverse fine cutting die for a high-gloss metal automotive decorative part, including an upper die base, a lower die base, a blank holding and positioning mechanism, and a reverse inclined wedge mechanism located behind the blank holding and positioning mechanism. The blank holding and positioning mechanism includes an upper die fixing base fixed to the lower side of the upper die base and a lower die fixing base fixedly installed on the lower die base. A lower die core for supporting the decorative part is installed on the upper side of the lower die fixing base. A blank holder is installed on the lower side of the upper die fixing base, and a blank holder plate for pressing the decorative part is installed on the lower side of the blank holder. A cutting tool for punching the end of the decorative part by rising controlled by the reverse inclined wedge mechanism is arranged behind the lower die core.

[0005] Further, the reverse inclined wedge mechanism includes a plug cutter arranged vertically and fixedly connected to the upper die base at the upper end. The cutting tool is fixedly installed on a reverse pushing block below it. A pushing block that can slide back and forth is arranged below the middle of the reverse pushing block and the plug cutter. The pushing block is in abutting cooperation with the reverse pushing block and the plug cutter through 45° inclined surfaces to realize that when the plug cutter descends, the reverse pushing block moves upward through the pushing block.

[0006] Further, a retaining block is fixedly connected to the lower die base behind the lower end of the plug cutter. The front side of the retaining block abuts against the rear side of the lower end of the plug cutter. A pull rod arranged in the front-rear direction penetrates through the middle of the retaining block. The front end of the pull rod is connected to the pushing block. A return spring for pushing the pull rod backward is sleeved on the pull rod. A buffer block is arranged on the front side of the retaining block.

[0007] Further, wear-resistant plates are installed on the front side of the anti-reverse block and the inclined surfaces on the front and rear sides of the pushing block. A chute is formed at the bottom of the pushing block, and a guiding block that is slidably engaged with the chute of the pushing block is installed on the lower die fixing base; convex guide rails are provided at the lower parts on both sides of the pushing block, and an L-shaped pressing block that is fixedly connected to the lower die fixing base and slidably engaged with the convex guide rails of the pressing pushing block is provided.

[0008] Further, a pressing spring is arranged between the blank holder and the upper die fixing base; hooks extending upward are connected to both sides of the blank holder, and hook grooves that are hooked and engaged with the hook parts at the upper ends of the hooks are formed on both sides of the upper die fixing base; limiting cones located on both sides of the pressing plate are arranged on the lower side of the blank holder, and tapered holes that are engaged with the limiting cones are formed on the upper side of the lower die fixing base.

[0009] Further, a notch for installing a reverse pushing block is formed at the rear part of the lower die fixing base. The rear end of the lower die insert extends into the notch. Vertical guiding grooves are formed on the inner walls on both sides of the notch. Guiding blocks that are slidably engaged with the vertical guiding grooves are arranged on both sides of the reverse pushing block. A chip discharging groove is arranged on one side at the upper end of the notch of the lower die fixing base. A chip discharging hole is formed on the lower die base and is located below the discharging end of the discharging groove. A drawer box for collecting the powder chips falling from the chip discharging hole and capable of being pulled outwards is arranged below the lower die base.

[0010] Further, a tool retracting spring for pulling the reverse pushing block downward to reset is connected to the lower end of the reverse pushing block, and a stop baffle for restricting the downward movement distance is fixedly connected to the lower die fixing base and is located below the reverse pushing block.

[0011] Further, the upper side surface of the lower die insert is a convex arched surface that bulges upward and is adapted to the concave surface of the decorative part, the lower side surface of the pressing plate is a concave arched surface that is concave upward and is adapted to the convex surface of the decorative part, the cutting edge part of the cutting tool is also convex arched, and the distance between the cutting edge part of the cutting tool and the convex arched surface of the lower die insert gradually becomes smaller from the middle to both ends.

[0012] Another technical solution of the present invention: A processing method for a reverse precision cutting die for a vehicle high-gloss metal decorative part as described above, comprising the following steps: (1) placing the concave surface of the product decorative part downward on the lower die insert; (2) closing the die by a punching press. The upper die base moves downward first to drive the upper die fixing base to move downward, and the upper die fixing base drives the blank holder to move downward together so that the pressing plate presses and fixes the decorative part; (3) the upper die base continues to move downward to drive the inserting tool to push the pushing block downward so that the pushing block moves forward. During the forward movement, the pushing block contacts the reverse pushing block and pushes the reverse pushing block to drive the cutting tool to move upward together to punch the product; (4) opening the die by the punching press. The upper die base moves upward to drive the upper die fixing base, the blank holder and the pressing plate to move upward to release the decorative part, and at the same time drives the inserting tool to move upward and the cutting tool to move downward to retract the tool.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The reverse fine cutting die for the high-gloss metal decorative parts for vehicles of the present invention is reasonably designed, the die structure is optimized, the overall service life of the die is improved, the phenomenon of wire breakage and project delay during mass production of products is avoided, the mass production rate of products is ensured, and the punching method is changed, which can reduce or even avoid burrs on the products during the punching process and improve the appearance quality of the products.

[0014] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below through specific embodiments and related drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the three-dimensional view of the overall structure of the embodiment of the present invention;

[0016] Figure 2 is the schematic diagram of the blank holding and positioning mechanism and the reverse inclined wedge mechanism in the embodiment of the present invention;

[0017] Figure 3 is Figure 2 the longitudinal sectional view of

[0018] Figure 4 is the three-dimensional view of the blank holding and positioning mechanism in the embodiment of the present invention;

[0019] Figure 5 is the rear view of the blank holding and positioning mechanism in the embodiment of the present invention;

[0020] Figure 6 is the three-dimensional view of the reverse inclined wedge mechanism in the embodiment of the present invention;

[0021] Description of the reference numerals in the drawings: 100 - upper die base, 200 - lower die base, 210 - chip removal hole, 300 - blank holding and positioning mechanism, 310 - upper die fixing seat, 311 - hook groove, 320 - lower die fixing seat, 321 - lower die core, 322 - notch, 323 - chip removal groove, 330 - blank holding seat, 331 - blank holding plate, 332 - hook, 333 - limit cone, 340 - cutting tool, 350 - reverse pushing block, 360 - blank holding spring, 370 - tool retracting spring, 380 - anti-retreat baffle, 390 - stop plate, 400 - reverse inclined wedge mechanism, 410 - inserting tool, 420 - pushing block, 430 - anti-retreat block, 440 - pull rod, 441 - return spring, 450 - wear-resistant plate, 460 - L-shaped pressing block, 500 - drawer box. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] As Figures 1-6As shown in the figure, a reverse precision cutting die for a high-gloss metal automotive decorative part includes an upper die base 100, a lower die base 200, a blank-holding and positioning mechanism 300, and a reverse inclined wedge mechanism 400 located behind the blank-holding and positioning mechanism. The blank-holding and positioning mechanism 300 includes an upper die fixing base 310 fixed to the lower side of the upper die base and a lower die fixing base 320 fixedly installed on the lower die base. A lower die core 321 for supporting the decorative part is installed on the upper side of the lower die fixing base 320. A blank-holding seat 330 is installed on the lower side of the upper die fixing base 310. A blank-holding plate 331 for pressing the decorative part is installed on the lower side of the blank-holding seat 330. The blank-holding plate is installed on the blank-holding seat 330 through bolts and pins, and the lower die core is installed on the lower die fixing base 320 through bolts and pins. The rear ends of the blank-holding plate and the lower die core are flush. A cutter 340 controlled by the reverse inclined wedge mechanism 400 to rise for punching the end of the decorative part is arranged at the rear side of the lower die core 321. The processed product decorative part is placed concave-side down on the lower die core, and the concave surface on the lower side of the decorative part fits the upper surface of the lower die core. The end of the decorative part extends out from the rear end of the lower die core. During the mold closing process, the blank-holding plate first presses the decorative part, and then the upper die base drives the cutter to move upward through the reverse inclined wedge mechanism 400 to punch the end of the decorative part. Moreover, this structure from bottom to top uses the blank-holding plate and the cutter as the cutting edge, optimizing the linear shape of the cutting edge of the cutter, reducing the punching force received by the cutting edge during the punching process, and can reduce or even avoid burrs on the product during the punching process, ensuring the service life of the cutting edge; during punching, a reverse supporting force is provided by the blank-holding plate, avoiding the product from breaking the wire during the production process due to the cracking of the lower die core, improving the overall service life of the mold, and ensuring the mass production rate of the product.

[0023] In this embodiment, the upper surface of the lower die core is a convex arched surface that bulges upward and is adapted to the concave surface of the decorative part, and the lower surface of the blank-holding plate is a concave arched surface that is concave upward and is adapted to the convex surface of the decorative part. The cutting edge part of the cutter is also convex arched, and the distance between the cutting edge part of the cutter and the convex arched surface of the lower die core gradually decreases from the middle to both ends. The draft angle of the cutting edge part of the cutter is 50°. By optimizing the cutting edge of the cutter, during the punching process, the two ends of the cutting edge part of the cutter first contact the two sides of the concave surface of the decorative part, changing the mode of punching the entire product cross-section simultaneously to non-simultaneous punching, that is, the cutting edge of the cutter first contacts the two ends of the product cross-section and then gradually punches to the middle part of the decorative part cross-section. The punching process principle is similar to the principle of scissors cutting, which well improves the light distortion phenomenon on the product surface and basically will not cause appearance problems after the end of the product is precisely cut.

[0024] In this embodiment, the reverse wedge mechanism 400 includes a cutting tool 410 vertically arranged and fixedly connected to the upper die base at the upper end. The cutting tool 340 is fixedly installed on a reverse pushing block 350 below it. A pushing block 420 capable of sliding back and forth is arranged below the middle of the reverse pushing block 350 and the cutting tool 410. The pushing block 420 is in abutting cooperation with the reverse pushing block 350 and the cutting tool 410 through 45° inclined surfaces respectively, so that when the cutting tool moves downward, the reverse pushing block moves upward through the pushing block, and the transmission of motion is realized through the cooperation of the 45° inclined surfaces. When the cutting tool moves downward, the pushing block moves forward, and when the pushing block moves forward, the reverse pushing block moves upward to drive the cutting tool to complete the punching work.

[0025] In this embodiment, a retaining block 430 is fixedly connected to the lower die base 200 behind the lower end of the cutting tool 410. The front side of the retaining block 430 abuts against the rear side of the lower end of the cutting tool. A pull rod 440 arranged in the front-rear direction penetrates through the middle of the retaining block 430. The front end of the pull rod 440 is connected to the pushing block. A return spring 441 for pushing the pull rod backward is sleeved on the pull rod 440. One end of the return spring abuts against the retaining block, and the other end abuts against the retaining ring at the rear end of the pull rod. A buffer block is arranged on the front side of the retaining block. When the cutting tool moves upward, the return spring 441 pulls the pushing block to move backward for reset.

[0026] In this embodiment, wear-resistant plates 450 are installed on the front side of the retaining block 430 and the inclined surfaces on the front and rear sides of the pushing block 350. A chute is formed at the bottom of the pushing block 350, and a guide block slidably matched with the chute of the pushing block is installed on the lower die fixing base; convex guide rails are arranged at the lower parts on both sides of the pushing block 350, and an L-shaped pressing block 460 fixedly connected to the lower die fixing base and slidably matched with the convex guide rails of the pushing block is provided to ensure the smooth movement of the pushing block without shaking.

[0027] In this embodiment, a blank holding spring 360 is arranged between the blank holding seat 330 and the upper die fixing base 310. The blank holding spring includes a helical spring and a nitrogen spring. During the whole movement process, by controlling the stroke of the blank holding spring, it is ensured that the product is first pressed and fixed on the lower die insert before punching; Hooks 332 extending upward are connected to both sides of the blank holding seat 330, and hook grooves 311 slidably matched with the hook parts at the upper ends of the hooks are formed on both sides of the upper die fixing base 310. When the upper die fixing base moves upward a certain distance first, the hooks hook the hook grooves, and then the blank holding seat is driven to move upward together through the hooks; Limiting cones 333 are arranged on the lower side of the blank holding seat 330 on both sides of the blank holding plate, and tapered holes matched with the limiting cones are formed on the upper side of the lower die fixing base.

[0028] In this embodiment, a notch 322 for installing a reverse pushing block is formed at the rear of the lower die fixing base 320. The rear end of the lower die core extends into the notch. Vertical guide grooves are formed on the inner walls on both sides of the notch. Guide blocks that are slidably engaged with the vertical guide grooves are arranged on both sides of the reverse pushing block to ensure that it can slide up and down without shaking. A chip discharging groove 323 is arranged on one side at the upper end of the notch of the lower die fixing base. A chip discharging hole 210 is formed on the lower die base 200 and located below the discharging end of the discharging groove. A drawer box 500 is arranged below the lower die base 200 to collect the powder chips that fall from the chip discharging hole and can be drawn outwards. The metal chips generated by punching fall into the drawer box through the chip discharging groove and the chip discharging hole for collection.

[0029] In this embodiment, a baffle plate 390 for preventing chip waste is arranged beside the rear side of the cutting tool 340 and the chip discharging groove 323.

[0030] In this embodiment, a retracting spring 370 for pulling the reverse pushing block downward to reset is connected to the lower end of the reverse pushing block. A stop baffle 380 is fixedly connected to the lower die fixing base and located below the reverse pushing block to limit the downward distance, thereby limiting the extreme position of the downward movement of the cutting tool.

[0031] The punching process of the reverse fine cutting die for the vehicle high-gloss metal decorative part of the present invention: Place the concave surface of the product decorative part downward on the lower die core. During the closing process of the punching press, the upper die base moves downward first to drive the upper die fixing base to move downward. The upper die fixing base drives the pressure holding seat to move downward together, so that the pressure holding plate presses and fixes the decorative part. The upper die base continues to move downward to drive the inserting tool to push the pushing block downward, so that the pushing block moves forward. During the forward movement, the pushing block contacts the reverse pushing block and pushes the reverse pushing block to drive the cutting tool to move upward together to punch the product.

[0032] The present invention can reduce or even avoid the appearance of burrs during the punching process of the product, and change the punching process by improving the cross-section of the cutting edge. The original mode of punching the entire cross-section of the product simultaneously is changed to non-simultaneous punching, thereby well improving the light distortion phenomenon on the surface of the product, and basically not causing appearance problems after the end of the product is finely cut. Moreover, the strength of the cutting edge of the optimized cutting tool is greatly enhanced, improving the overall service life of the die, avoiding the phenomenon of wire breakage and project delay during mass production of the product, and ensuring that the product manufacturer will not suffer a large amount of time and economic losses due to die problems. The structure of the present invention is scientific and reasonable, avoiding the need for debuggers to spend a lot of time repairing the cutting edge, reducing the die debugging time, improving the die production and repair efficiency, reducing the labor cost invested by the die manufacturing factory, and reducing the die delivery time.

[0033] It includes the following steps: (1) Place the concave side of the product decorative part downward on the lower die core; (2) The punching press closes the mold. The upper die base moves downward first to drive the upper die fixing base to move downward. The upper die fixing base drives the pressure plate seat to move downward together, so that the pressure plate presses and fixes the decorative part; (3) The upper die base continues to move downward to drive the inserting knife to push the pushing block downward, so that the pushing block moves forward. During the forward movement, the pushing block contacts the reverse pushing block and pushes the reverse pushing block to drive the cutting knife to move upward together to punch the product. During the punching process, that is, the cutting edge of the cutting knife first contacts both ends of the product cross-section, and then gradually punches to the middle part of the decorative part cross-section; (4) The punching press opens the mold. The upper die base moves upward to drive the upper die fixing base, the pressure plate seat and the pressure plate to move upward to release the decorative part. At the same time, it drives the inserting knife to move upward. The pushing block moves backward under the action of the return spring, and the reverse pushing block moves downward under the action of the retracting knife spring to drive the cutting knife to move downward to retract the knife.

[0034] For any of the technical solutions disclosed in the present invention above, unless otherwise stated, if it discloses a numerical range, the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is only the numerical values with obvious technical effects or representativeness among many implementable numerical values. Since there are too many numerical values to list exhaustively, the present invention only discloses some numerical values to illustrate the technical solutions of the present invention. Moreover, the above-listed numerical values should not constitute a limitation to the protection scope of the present invention.

[0035] If the present invention discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected by bolts or screws), or it can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integral structure (for example, manufactured by integral casting process) (except when it is obviously impossible to adopt the integral forming process).

[0036] In addition, for the terms used to represent the positional relationship or shape in any of the technical solutions disclosed in the present invention above, unless otherwise stated, their meanings include states or shapes that are approximate, similar or close to them.

[0037] Any component provided by the present invention can either be assembled from multiple separate components or be a single component manufactured by an integral forming process.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the specific implementation manners of the present invention or perform equivalent replacements on some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. A reverse precision cutting die for high-gloss metal decorative parts for vehicles, characterized in that: The present invention comprises an upper die seat, a lower die seat, a material pressing positioning mechanism and a reverse bevel mechanism located behind the material pressing positioning mechanism, wherein the material pressing positioning mechanism comprises an upper die fixing seat fixed to the lower side of the upper die seat and a lower die fixing seat fixedly installed on the lower die seat, a lower die core for supporting the decorative part is installed on the upper side of the lower die fixing seat, a material pressing seat is installed on the lower side of the upper die fixing seat, a material pressing plate for pressing the decorative part is installed on the lower side of the material pressing seat, a cutter which is controlled to rise by the reverse bevel mechanism to punch the end of the decorative part is arranged on the rear side of the lower die core, the upper die seat pushes the cutter to move upward through the reverse bevel mechanism to punch the end of the decorative part, and the material pressing plate and the cutter are used as the cutting edge; the upper side surface of the lower die core is a convex arch surface which is raised upward and matched with the concave surface of the decorative part, the lower side surface of the material pressing plate is a concave arch surface which is concave upward and matched with the convex surface of the decorative part, and the blade of the cutter It is also convex arched, and the distance between the cutting knife blade and the convex arch surface of the lower die core gradually decreases from the middle to the two ends; the reverse bevel mechanism includes a plunger arranged vertically and the upper end of which is fixedly connected to the upper die seat, and the cutting knife is fixedly installed on the reverse push block below it, and a push block that can slide back and forth is arranged between the reverse push block and the plunger, and the push block, the reverse push block and the plunger are all abutted and matched by a 45° inclined surface to achieve the upward movement of the reverse push block through the push block when the plunger moves downward; a press spring is arranged between the press seat and the upper die fixing seat; upwardly extending pull hooks are connected to both sides of the press seat, and hook grooves are provided on both sides of the upper die fixing seat to hook and cooperate with the hook portion at the upper end of the pull hook; a limiting cone located on both sides of the press plate is arranged on the lower side of the press seat, and a conical hole cooperating with the limiting cone is opened on the upper side of the lower die fixing seat.

2. The reverse precision cutting die for high-gloss metal decorative parts for vehicles according to claim 1, characterized in that: A stop block located behind the lower end of the insert knife is fixedly connected to the lower die base, the front side of the stop block abuts against the rear side of the lower end of the insert knife, a pull rod arranged along the front and rear directions passes through the middle of the stop block, the front end of the pull rod is connected to the pushing block, a return spring for pushing the pull rod backwards is sleeved on the pull rod, and a buffer block is arranged on the front side of the stop block.

3. The reverse precision cutting die for high-gloss metal decorative parts for vehicles according to claim 2, characterized in that: Wear-resistant plates are installed on the front side of the stop block and the inclined surfaces on the front and rear sides of the pushing block. A sliding groove is opened at the bottom of the pushing block, and a guide block that slides with the sliding groove of the pushing block is installed on the lower mold fixing seat; there are raised guide rails on the lower parts of both sides of the pushing block, and the lower mold fixing seat is fixedly connected with an L-shaped pressing block that presses the raised guide rail of the pushing block and slides with it.

4. The reverse precision cutting die for high-gloss metal decorative parts for vehicles according to claim 1, characterized in that: The rear part of the lower die fixing seat is provided with a slot for installing a reverse pushing block, the rear end of the lower die core extends into the slot, the inner walls on both sides of the slot are provided with vertical guide grooves, and the reverse pushing block is provided with guide blocks slidingly matched with the vertical guide grooves on both sides. The lower die fixing seat is provided with a chip removal groove on one side of the upper end of the slot, the lower die seat is provided with a chip removal hole located below the discharge end of the removal groove, and a drawer box is provided below the lower die seat for collecting powder and chips falling from the chip removal hole and being able to be pulled out.

5. The reverse precision cutting die for high-gloss metal decorative parts for vehicles according to claim 1, characterized in that: The lower end of the reverse push block is connected with a retraction spring for pulling it downward to reset, and the lower die fixing seat is fixedly connected with a retraction stop plate located below the reverse push block to limit the downward distance.

6. A method for processing a reverse precision cutting die for a high-gloss metal decorative part for a vehicle as claimed in claim 1, characterized in that: The following steps are involved: (1) Place the product decorative part with the concave surface facing downward on the lower die core; (2) The punch press closes the mold, and the downward movement of the upper die seat first drives the upper die fixed seat to move downward, and the upper die fixed seat drives the pressure plate to move downward together so that the pressure plate presses and fixes the decorative part; (3) The upper die seat continues to move downward to drive the insert knife to push the push block downward so that the push block moves forward. During the forward movement, the push block contacts the reverse push block and pushes the reverse push block to drive the cutter to move upward together to punch and cut the product; (4) The punch press opens the mold, and the upward movement of the upper die seat drives the upper die fixed seat, the pressure plate and the pressure plate to move upward to release the decorative part, and at the same time drives the insert knife to move upward and the cutter to move downward to retract.

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