CN112077939A

CN112077939A - Burr-free plastic plate contour cutting die

Info

Publication number: CN112077939A
Application number: CN202011000207.0A
Authority: CN
Inventors: 王俭华
Original assignee: Kunshan Shibaode Precision Die Co ltd
Current assignee: Kunshan Shibaode Precision Die Co ltd
Priority date: 2020-09-22
Filing date: 2020-09-22
Publication date: 2020-12-15

Abstract

The invention belongs to the technical field of dies, and relates to a contour cutting die for a burr-free plastic plate, which comprises an upper die and a lower die, wherein the upper die comprises a pressing plate with a penetrated middle part, and the lower die comprises a die holder, a supporting plate floating above the die holder and a limiting column upwards penetrating through the supporting plate and the pressing plate from the die holder; the die holder is provided with a floating plate capable of ascending and descending below the supporting plate, a movable plate limited above the floating plate and a cutter plate fixed above the movable plate and penetrating through the supporting plate, a guide mechanism surrounding the movable plate is further fixed above the die holder, the guide mechanism is provided with convex ridges facing the movable plate, the convex ridges comprise planes at the top and slope surfaces at two sides, each side surface of the movable plate is provided with a concave-convex belt structure matched with the corresponding convex ridges, and the concave-convex belt structures on the opposite side surfaces of the movable plate are opposite in concave-convex condition. The die can prevent burrs from being generated in the cutting of plastic products, ensure the product quality, reduce processing waste and save the processing cost.

Description

Burr-free plastic plate contour cutting die

Technical Field

The invention relates to the technical field of dies, in particular to a contour cutting die for a burr-free plastic plate.

Background

Sheet-like plastic products often require trimming. It is common practice in CNC machining to mill the sides with a milling cutter to the desired product profile. However, this method has the following problems:

firstly, burrs are easily left on the edges of plastic products during processing, which brings defects on appearance, and leads to post-treatment to meet the requirements of customers;

secondly, a large amount of heat generated by cutting can cause the deformation of the plastic product, so that the product precision can be influenced;

cutting produces a lot of waste materials that are broken in small, broken bits, again will use a large amount of water for the cooling, produce a large amount of waste water then, the easy polluted environment.

Therefore, it is necessary to develop a new cutting die to solve the above problems.

Disclosure of Invention

The invention mainly aims to provide a contour cutting die for a burr-free plastic plate, which can be used for processing the contour of the plastic plate in a die cutting mode and has low cost and high quality.

The invention realizes the purpose through the following technical scheme: a contour cutting die for a burr-free plastic plate comprises an upper die and a lower die, wherein the upper die comprises a pressing plate with a penetrating middle part, and the lower die comprises a die holder, a supporting plate floating above the die holder and a limiting column upwards penetrating through the supporting plate and the pressing plate from the die holder; the die holder is provided with a floating plate capable of ascending and descending below the supporting plate, a movable plate limited above the floating plate and a cutter plate fixed above the movable plate and penetrating through the supporting plate, a guide mechanism surrounding the movable plate is further fixed above the die holder, the guide mechanism is provided with convex ridges facing the movable plate, the convex ridges comprise planes at the top and slope surfaces at two sides, each side surface of the movable plate is provided with a concave-convex belt structure matched with the corresponding convex ridges, and the concave-convex belt structures on the opposite side surfaces of the movable plate are opposite in concave-convex condition.

Specifically, the slope surface forms an included angle of 45 degrees relative to the horizontal direction.

Specifically, a plurality of gas springs connected with the movable plate are arranged below the die holder.

Specifically, the guide mechanism is four guide blocks respectively arranged on the periphery of the movable plate.

Specifically, a limiting frame is arranged above the guide mechanism, and the hollow range of the limiting frame is smaller than the plate surface range of the movable plate and larger than the cross section range of the cutting plate.

By adopting the technical scheme, the technical scheme of the invention has the beneficial effects that:

the die can prevent burrs from being generated in the cutting of plastic products, ensure the product quality, reduce processing waste and save the processing cost.

Drawings

FIG. 1 is a front sectional view of a burr-free plastic plate profile cutting mold according to an embodiment before pressing;

FIG. 2 is a main sectional view of the burr-free plastic plate profile cutting mold according to the embodiment after pressing;

FIG. 3 is a perspective view of a guide block according to one embodiment;

fig. 4 is a perspective view of the movable plate of the embodiment.

The figures in the drawings represent:

1-upper die, 11-pressing plate;

2-lower die, 21-die holder, 211-limiting column, 22-supporting plate, 23-floating plate, 231-gas spring, 24-movable plate, 241-concave-convex belt structure, 25-knife plate, 26-guiding mechanism, 260-guiding block, 261-convex ridge, 262-plane, 263-slope and 27-limiting frame;

3-products.

Detailed Description

The present invention will be described in further detail with reference to specific examples.

Example (b):

as shown in fig. 1 to 4, the contour cutting die for a burr-free plastic plate of the present invention comprises an upper die 1 and a lower die 2, wherein the upper die 1 comprises a pressing plate 11 with a middle part penetrating through, the lower die 2 comprises a die holder 21, a supporting plate 22 floating above the die holder 21, and a spacing column 211 passing through the supporting plate 22 and the pressing plate 11 from the die holder 21 upwards; the die holder 21 is provided with a floating plate 23 capable of ascending and descending below the supporting plate 22, a movable plate 24 limited above the floating plate 23, and a knife plate 25 fixed above the movable plate 24 and penetrating through the supporting plate 22, a guide mechanism 26 surrounding the movable plate 24 is further fixed above the die holder 21, the guide mechanism 26 is provided with a convex ridge 261 facing the movable plate 24, the convex ridge 261 comprises a plane 262 at the top and slope surfaces 263 at two sides, each side surface of the movable plate 24 is provided with a concave-convex belt structure 241 matched with the corresponding convex ridge 261, and the concave-convex belt structures 241 on the opposite side surfaces of the movable plate 24 are opposite in concave-convex condition. In operation, the lowering of the pressure plate 11 will first cooperate with the pallet 22 to clamp the product 3 and then move downwards, and then the product 3 will contact the knife plate 25; when the knife board 25 moves downwards, the convex ridge 261 on the guide mechanism 26 brings a lateral acting force to the concave-convex belt structure 241, and then the movable plate 24 sequentially performs the translation in the X-axis direction and the translation in the Y-axis direction (the XY coordinate system is located in the horizontal plane) relative to the floating plate 23, so that the movable plate 24 moves back and forth on the floating plate 23 while moving up and down (i.e., the X-axis forward motion, the Y-axis forward motion, the X-axis reverse motion and the Y-axis reverse motion are sequentially performed), four edges on the corresponding product 3 profile can be cut off by the knife board 25, the obtained product profile can not leave burrs left after milling, and the product quality is ensured. And no powdery or liquid waste is left after processing, thereby saving the treatment cost.

As shown in fig. 1 and 2, the ramp 263 is angled at 45 ° relative to horizontal. During the molding process, the slope 263 provides an upward oblique thrust to the concave-convex belt structure 241 and transmits the thrust to the knife plate 25 as a shear force, and the slope 263 has a moderate inclination angle to balance the requirements of the stroke and the shear force.

As shown in fig. 1 and 2, a plurality of gas springs 231 connected with the movable plate 23 are arranged below the die holder 21. The movable plate 23 can be vertically lifted by the elastic force of the plurality of gas springs 231, so that the horizontal posture of the movable plate 24 when lifted is maintained, and the knife plate 25 is also made to trim the contour of the product 3.

As shown in fig. 3, the guiding mechanism 26 is four guiding blocks 260 respectively disposed around the movable plate 24. When the movable plate 24 is installed in this way, the guide blocks 260 can be respectively fixed on the die holders 21 after the movable plate 24 is in place, and the installation is convenient.

As shown in fig. 1 and 2, a limit frame 27 is provided above the guide mechanism 26, and a hollow range of the limit frame 27 is smaller than a plate surface range of the movable plate 24 and larger than a cross-sectional range of the knife plate 25. The limiting frame 27 and the guiding mechanism 26 form a space for the movable plate 24 to move only inside, so that the lower mold 2 has better integrity.

What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a no burr plastic slab profile cutting die which characterized in that: the die comprises an upper die and a lower die, wherein the upper die comprises a pressing plate with a penetrating middle part, and the lower die comprises a die holder, a supporting plate floating above the die holder and a limiting column penetrating through the supporting plate and the pressing plate from the die holder to the upper part; the die holder is provided with a floating plate capable of ascending and descending below the supporting plate, a movable plate limited above the floating plate and a cutter plate fixed above the movable plate and penetrating through the supporting plate, a guide mechanism surrounding the movable plate is further fixed above the die holder, the guide mechanism is provided with convex ridges facing the movable plate, the convex ridges comprise planes at the top and slope surfaces at two sides, each side surface of the movable plate is provided with a concave-convex belt structure matched with the corresponding convex ridges, and the concave-convex belt structures on the opposite side surfaces of the movable plate are opposite in concave-convex condition.

2. The contour cutting die for a burr-free plastic plate of claim 1, wherein: the slope surface forms an included angle of 45 degrees relative to the horizontal direction.

3. The contour cutting die for a burr-free plastic plate of claim 1, wherein: and a plurality of gas springs connected with the movable plates are arranged below the die holder.

4. The contour cutting die for a burr-free plastic plate of claim 1, wherein: the guide mechanism is four guide blocks which are respectively arranged on the periphery of the movable plate.

5. The contour cutting die for a burr-free plastic plate of claim 1, wherein: a limiting frame is arranged above the guide mechanism, and the hollow range of the limiting frame is smaller than the plate surface range of the movable plate and larger than the cross section range of the cutting plate.