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What is a die? What is the use of a die?
First, the origin and definition of the mold
Origin: When the mold originated, it has not been verified. In the Stone Age, more than two million years ago, it is said that human beings know that making molds is not practical. Because human beings at that time were mainly based on survival, there was no time or energy to think about things other than survival. The Stone Age is an era dominated by stone equipment. Of course, people also use wood, bamboo and bone as devices to engage in production activities.
Definition: Various molds and tools used in industrial production for injection molding, blow molding, extrusion, die casting or forging, smelting, stamping, drawing, etc. to obtain the desired product. In short, a mold is a tool for forming an article, and the tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the shape of the article by changing the physical state of the formed material. This special tool is collectively referred to as a mold.
Second, the definition and development of stamping die
China's archaeological discovery, as early as more than 2,000 years ago, China's existing stamping dies were used to manufacture bronzes, which proved that the achievements of ancient Chinese stamping and stamping dies were leading in the world. In 1953, Changchun First Automobile Manufacturing Co., Ltd. established the first die shop in China. In 1958, the factory began to manufacture automotive cover molds. China began to produce fine-punching molds in the 1960s. After a long and arduous development path, China has formed more than 30 billion yuan (excluding the statistics of Hong Kong, Macao and Taiwan, the same below.) The production capacity of various stamping dies. With the development of computer technology, computers have gradually entered various fields of mold production, including design, manufacturing, and management. The International Association for Production Research predicts that by 2000, drawings that are the means of communication between design and manufacturing will lose their primary role. The most fundamental point in the automatic design of molds is the need to establish mold part standards and design standards. In order to get rid of the design method that was centered on people's thinking judgments and practical experience, it is necessary to serialize, digitize, and digitize past experiences and methods of thinking, and store them in the computer as design criteria. Because the mold components are also different, it is almost impossible to create a design software that can adapt to various parts.
Compared with the traditional die-cutting process
The traditional die-cutting method is drawn with a pencil or a ballpoint pen on the knife template, and then sawn by a sawing saw, and a misalignment occurs during the moving process, which causes an error; the processing speed is slow;
After using the laser cutting machine, the drawing design can be directly carried out on the computer. The knife template is fully automated and cut by the laser cutting machine without manual intervention. The error is small and the speed is fast. The application of the laser die cutting machine can significantly accelerate the development of the enterprise and improve economic efficiency.
5, a variety of laser die
Know the knife mold; the type of knife from the blade angle, the hardness of the blade and the blade; the knife's texture, the blade and the surface of the blade to distinguish the surface processing, there are no more than 100 kinds, the following are common and common molds:
Engraving stripping die, etching die
Aluminum plate cutter
Wood cutter (laser cutter)
Hardware mold, QDC composite mold
Round knife roller die and hot stamping, embossing die, etc.
An electronic precision knife mold carved from a whole piece of die steel CNC, the material thickness is 8MM-10MM, the material thickness is up to 15MM, the accuracy is plus or minus 0.03MM, using imported steel, forming once, without cutting edge, In addition, high-precision high and low knives can be made on the same die, and the punching life is generally 100-200K times.
Repeatable grinding of the blade, that is, the blade can be rebuilt after being blunt, and it is a new knife.
Different process holes, steps, indentations, positioning, knife height, etc. can be designed to provide unlimited possibilities for special die cutting requirements.
The minimum distance between the blade and the blade can be 0.6MM
The die-cut product has a smooth cut surface, no connection, and long die-cutting life.
The closed hole can be used for waste disposal, eliminating the cost of manual waste.
Excellent single-edged knife, the highest blade can achieve 6mm;
The knife edge seamlessly cuts the line smoothly and has high repeatability; the price is slightly cheaper than the aluminum alloy knife
Suitable for products with extremely tight tolerances, the thickness of the product should not exceed 0.25mm
It is carved from CNC steel by a whole die steel.
1, the knife surface is flat, almost no need to adjust the height of the knife edge
2, the same set of die, can be combined according to different high and low knives (full break half cut)
The knife height is generally about 1.5mm
3, dimensional accuracy (0.03MM), suitable for precision cutting, the minimum distance between the blade and the blade can be 0.3MM
4. The section of the stamping product is smooth, but it is only suitable for stamping materials below 0.2mm.
5. Several of the same graphics are almost the same size on the same die. The same die repeats the error almost zero.
6, the normal stamping life is generally around 50-200K
Cut into a whole line of wood material
The blade height is 6mm and the bottom plate height is 18mm.
Accuracy is accurate to ±0.3mm
Suitable for the production of PCs up to 0.5mm, and can also produce small holes with a diameter of 3mm or less (springs can be installed in the holes)
The price is generally used for stamping some products with larger size, thicker materials, larger tolerances and harder materials.
The die-cutting life is normal at around 50K, and the die-cutting materials are not the same.
Wood board die processing equipment
The bottom plate of the die is a whole piece of aluminum plate, and the slit is laser-cut to cut through the entire aluminum plate, and then the blade is mounted.
Blade height is 3.5MM
High precision, up to ±0.1mm
The blade is not easily deformed, and the blade can be recycled.
Suitable for the production of PC materials below 0.5mm (including less than 0.5)
Aluminum plate cutter
The bottom plate is a plastic plate, and the blade plate is formed by laser cutting a whole piece of aluminum plate.
The blade is generally 3mm, the height of the aluminum plate is 5mm, the bottom plate is 3mm, and the overall height is 11mm.
High precision, accurate to ± 0.2mm
The blade is not easily deformed, and the blade can be replaced after the blade is broken.
Suitable for all kinds of PC printing below 0.5mm (including 0.5mm)
The plates are all cut from plastic sheets, and then the curved knife is loaded.
Blade height is 2.5----3mm
Less accurate, range is ±0.3mm
The blade is easily deformed and can be recycled
Suitable for the production of paper-based prints and simple prints for PCs up to 0.25 mm
The price and the etching die are cheaper, mainly used for some double-sided adhesive materials, and the products are large in quantity and less complicated in process.
Normal die cutting life is around 100-200K
The metal mold is used in industrial production, using various presses and special tools mounted on the press to produce metal parts of the desired shape or parts by pressure. This special tool is collectively called metal mold.
Metal molds can be classified according to various processes: punching die, bending die, drawing die, forming die
Other combination modes: single-process mode, composite mode, progressive mode (also called continuous mode), multi-station mode
Blanking die A separate mold, such as blanking die, punching die, cutting die, slit die, trimming die, cutting die, etc., along a closed or open contour.
Bending Mold A mold that bends a sheet blank or other blank along a straight line (curved line) to obtain a workpiece of a certain angle and shape.
The drawing die is a die in which the blank of the sheet is made into an open hollow member, or the hollow member is further changed in shape and size.
The forming die is a mold in which the blank or the semi-finished workpiece is directly copied and formed in the shape of the convex and concave molds, and the material itself only produces a partial plastic deformation. Such as bulging die, shrinking die, flaring die, undulating forming die, flanging die, shaping die, etc.
Single-step mold In the one stroke of the press, only one mold for the stamping process is completed.
Composite mold There is only one station, in the first stroke of the press, two or more stamping processes are completed simultaneously at the same station.
The progressive die press adopts the strip-shaped stamping raw material in one press stroke, and simultaneously completes the cold stamping die of multiple stamping processes on several pairs of molds on one pair of molds. Move once to the completion of the product.
In the multi-station die, the material strip always moves in one direction during the stamping process; the inner strip of the mold is cut into two or more directions and is called the progressive die; the feeding of the strip in the mold is called the automatic continuous die. In a stamping production chain, a stamping die with different processes is used with a robot or other automated facility, and the die or part moving is used to complete the workpiece stamping process. The rated die is called a multi-station die.
Metal molds and stampings
QDC composite mode
The QDC module adopts the combination of modules, and is mounted into the metal die holder by using a carving die or a corrosion die, for punching and stripping; because the die can be replaced according to different die cutting needs, taking into account the die cutter Advantages and precision and stability of the die can also be stamped according to the needs of die cutting. The tolerance of the two sets of holes can reach 0.05mm.
Mainly used to produce some products that are complicated in process and difficult to discharge.
Die cutting life can be repeated
QDC composite mode
Round knife roller mold, bronzing film, concave and convex mold
How to choose the angle of the die cutter according to the die cutting material
First, ordinary cardboard ordinary cardboard includes common cardboard, corrugated paper and so on. Die-cutting This type of paperboard can be selected from ordinary laser knives (edge angle 52o). If the die-cutting shape is complicated, it is necessary to select a tool with a slightly lower hardness and a better bending machine. In the die cutting process, if the die cutting pressure is required to be small, a blade having a blade angle of 42 o can be selected. Small die cutting pressure reduces blade wear and extends die cutting life
Second, rigid rubber sheet hard rubber sheet includes PVC, PET, electronic board, high-density materials, gaskets and so on. Molding of such materials requires the use of a high hardness tool. The ordinary laser cutter has a hardness of 39HRC and a blade hardness of 57HRC. If the die is hard-cut, it needs to use a blade with a hardness of 47HRC and a blade hardness of 59HRC. The smaller the blade angle, the greater the blade hardness, the better the wear resistance.
three. Flexible material flexible materials include aluminum foil, peritoneal material, soft plastic and so on. For die-cutting such materials, it is necessary to use a finely ground blade with a sharp edge. This type of blade has a smooth blade surface, requires less die-cutting pressure, can pass through the viscous material, and reduces the problem of brushing and fluffing.
four. Recycled paper die-cut recycled paper is very easy to produce paper powder, so choose a tool that can reduce the friction between the blade and the paper during die cutting. The blade surface is polished or coated to be very smooth and can meet this requirement; if the edge angle reaches 42o, the die cutting pressure can be further reduced, so that the die cutting dust reaches at least
Fourth, mold use specifications
Receive the corresponding mold according to the number on the processing instruction sheet
Must be registered on the "Mold and Fixtures" when you use it.
Check if there is a knife bag / die mark / with or without a sponge
Whether the die is qualified or not, if it is found that there is a problem with the die, it must be reported to the boss in time, and it cannot be handled privately, or it can be used to produce it!
The die that has been produced by the machine must be placed in the corresponding die pocket and placed in a uniform area.
The original employer must return the mold to the mold rack and register
If there is a problem with the die, the machine personnel must report the boss immediately and indicate where the die problem is indicated on the die.
The machine personnel must find out the cause of the bad die, so as to deal with it in time to prevent similar events from happening again.
Molding and demoulding
The die-cutting tool holder must be inserted in and out at the flat end, so that it cannot be tilted to avoid collision.
When disassembling the mold, take care of the knife and do not hit the knife.
When handling the die problem, the tool should be careful not to hit the knife.
Do not place metal tools on the dies of the die-cutting machine to avoid falling.
High elasticity of sponge
Sponge height requirement is 0.5mm higher than the blade
Must trim the sponge according to different printing requirements
The elastic strength of sponge is not high
Sponge height requirements are higher than
Properly trim the sponge according to the requirements of the print
1. Mold maintenance and maintenance when taking over or returning the mold
2. If you need to change the mold during production, you should not put the mold randomly. It must be placed on the countertop without other iron and other materials, and the knife edge must be placed face down or a protective plate should be placed on the knife edge to prevent it. Other objects fall and damage the tool
3. In the production process, if there is a broken joint at the joint of the mold knife, it must be cleaned in time to prevent the knife edge from opening and affecting the production.
4. Spray the rust inhibitor on the mold that is not commonly used to prevent the tool from rusting.
Five, the common die is abnormal --- knife edge
The blade interface is not received
Blade offset at the interface
The blade is not connected --- can be tapped at the ends of the blade towards the middle
The interface is not connected properly - you can use the needle-nosed pliers to gently clip the offset blade
Do not operate without professional
Try not to touch other blades during operation
Common die abnormalities --- gap
The blade is bruised during circulation
The blade is improperly handled during use.
Use a utility blade to gently wipe the sides of the blade, not too hard. Until the blade is not abnormal
Depending on the severity of the gap, if it is too serious, it must be replaced.
Moderate, not too hard
Special reminder that paper prints must increase the inspection frequency after scraping the blade