Features of hardware mold accessories:
1. Wear resistance
When the blank is plastically deformed in the mold cavity, it both flows and slides along the surface of the cavity, causing severe friction between the surface of the cavity and the blank, resulting in the failure of the mold due to wear. Therefore, the wear resistance of the material is one of the most basic and most important properties of the mold.
Hardness is the main factor affecting wear resistance. In general, the higher the hardness of the mold parts, the smaller the amount of wear and the better the wear resistance. In addition, wear resistance is also related to the type, quantity, shape, size and distribution of carbides in the material.
2. Strong toughness
Most of the working conditions of the mold are very bad, and some often bear a large impact load, which leads to brittle fracture. In order to prevent sudden brittle fracture of mold parts during operation, the mold must have high strength and toughness. The toughness of the mold mainly depends on the carbon content, grain size and organizational state of the material.

The casting process is a process of unifying pressure, speed and time by using three major elements: machine, mold and alloy. For metal thermal processing, the presence of pressure is the main feature that distinguishes the die casting process from other casting methods. Die casting is a special casting method that develops rapidly in modern metal processing technology. It is the process of filling the mold with molten metal under high pressure and high speed, and crystallizing and solidifying under high pressure to form a casting.
In the industrial field, precision parts are divided into many types. Since the technology involved in each industry is different, so are the parts that are employed and used. Due to the different shapes of the parts, in many cases they have to be processed by various processing methods to enhance its quality and related attribute functions.

Metal molds are classified according to the processing method of the product.
(1) Punching and shearing dies: The work is completed by shearing. Commonly used methods include shearing dies, blanking dies, punching dies, trimming dies, edge trimming dies, punching dies and punching dies.
(2) zigzag die: it is to bend the flat blank into the shape of a viewpoint, depending on the shape, precision and production volume of the part, there are many different ways of die, such as ordinary zigzag die, cam zigzag die, roll Side punching die, arc bending punching die, bending punching punching die and distorted punching die, etc.
(3) Drawing mold: Drawing mold is to make flat blank into seamless container with bottom.
(4) Forming die: It refers to changing the shape of the blank by various partial deformation methods, such as convex forming die, curl forming die, necking forming die, hole flange forming die, and round edge forming die.

Stamping dies are technology-intensive products, which have been widely used in various fields of the national economy and all walks of life. The level of design and manufacturing technology of stamping dies and plastic molds is an important indicator to measure the level of a country's manufacturing industry, and to a large extent determines the quality, efficiency and new product development capabilities of products. The following plastic mold manufacturers will describe some design skills of precision metal stamping molds:
1. Design skills: generally first trimming, punching, punching, pre-breaking, pressing, punching, tearing, punching and blanking, pressing burrs, forming, bending in two steps, forming half first, After forming the other half.
2. When punching and blanking of metal mold stamping parts, generally punch small holes first, then punch large holes: first punch the waste around the forming, and then drop the remaining materials in other parts: because if the punching holes are placed at the back, then When it is punching, there may be gaps in the corresponding parts of the material belt around the punch, so that the punch will cause uneven force during the punching process. The original small hole punch is weak, and the force is uneven. , It is very easy to break. Of course, this is only in most cases.

Features of hardware mold accessories:
1. Wear resistance
When the blank is plastically deformed in the mold cavity, it both flows and slides along the surface of the cavity, causing severe friction between the surface of the cavity and the blank, resulting in the failure of the mold due to wear. Therefore, the wear resistance of the material is one of the most basic and most important properties of the mold.
Hardness is the main factor affecting wear resistance. In general, the higher the hardness of the mold parts, the smaller the amount of wear and the better the wear resistance. In addition, wear resistance is also related to the type, quantity, shape, size and distribution of carbides in the material.
2. Strong toughness
Most of the working conditions of the mold are very bad, and some often bear a large impact load, which leads to brittle fracture. In order to prevent sudden brittle fracture of mold parts during operation, the mold must have high strength and toughness. The toughness of the mold mainly depends on the carbon content, grain size and organizational state of the material.

Metal molds are classified according to the nature of the process
(1) The blanking die is a die that separates materials along a closed or open contour. Such as blanking dies, punching dies, cutting dies, incision dies, trimming dies, cutting dies, etc.
(2) The zigzag die is a die that bends and deforms the sheet blank or other blank along a straight line (zigzag line), thereby obtaining a workpiece with a certain viewpoint and shape.
(3) The deep drawing die is a die that makes the sheet blank into an open hollow part, or further changes the shape and size of the hollow part.
(4) The forming mold is a mold that directly imitates the blank or semi-finished workpiece according to the shape of the convex and concave molds, and the material itself only undergoes partial plastic deformation. Such as bulging die, shrinking die, flaring die, rugged forming die, flanging die, shaping die, etc.

Metal molds are classified according to the degree of process combination
(1) A single-process die is a die that only completes one stamping process in one stroke of the press.
(2) The composite mold has only one station. In one stroke of the press, two or more stamping processes are completed together at the same station.
(3) The progressive die (also known as the continuous die) has two or more stations in the feeding direction of the blank. In one stroke of the press, two or two passes are completed at different stations one after another. Dies for the stamping process above.
(4) The transfer mold summarizes the characteristics of the single-process mold and the progressive mold. Using the robot transfer system to complete the rapid transfer of the product in the mold can greatly improve the production efficiency of the product, reduce the production cost of the product, save the cost of materials, and improve the quality of the product. Safe and reliable.

Process analysis of plastic mold products. Before designing, we must first conduct a comprehensive analysis and research on the performance of the plastic mold product, and carefully discuss with the plastic mold manufacturer to reach an agreement. During this process, the product geometry, dimensional accuracy and appearance requirements need to be discussed to avoid unnecessary complexity in mold making.
Mold structure design. A good mold requires not only good processing equipment and skilled molds, but also good mold design, especially for complex molds. Mold design quality accounts for more than 80% of mold quality.
The mold design is: under the premise of meeting customer requirements, the processing cost is low, the processing difficulty is high, and the processing time is short. Therefore, we must not only fully digest the needs of customers, but also understand the injection molding machine, mold structure, processing technology and the processing capacity of the mold itself. Therefore, in order to improve the level of mold design, the following operations should be performed.

The ideal scrap should have a reasonable crushing angle and a uniform bright band. This keeps the stamping pressure as small as possible, creating a neat round hole with the smallest burr. Therefore, in order to prolong the service life of the mold, the clearance should be increased considering the quality of the finished hole.
Selection of plastic mold gap. The die gap is related to the die material and thickness. Not having a reasonable interval can lead to the following problems:
(1) If the gap is too large, the burr of the stamping part is relatively large, and the stamping quality is poor. If the gap is too small, although the punching quality is good, the die wear is serious, the die life is greatly reduced, and the punch is prone to breakage.
(2) If the gap is too large or too small, it is easy to cause bonding to the punching material, resulting in the formation of strip-shaped material during punching. If the gap is too small, a vacuum is likely to be formed between the bottom surface of the punch and the plate, and the waste material will rebound.

How do plastic mold manufacturers deal with white edges? Generally, people who do not understand this profession first consider changing materials. Why do you say that? Because this is a method that many people who do not understand plastic injection processing know, but this method has a drawback, which is waste. Is there no other solution other than changing the material? So how is the white border formed?
White edge is a unique injection defect of modified polyethylene and plexiglass, mainly on the edge of the part near the parting surface. The white edge is an aggregate composed of many tiny spaces between directly stretched oriented molecules and the flow direction. There is still a polymer link phase in the direction of the white edge, so the white edge is not a crack. Under proper heating, the stretched-direction molecules may return to their natural bending state, causing the white edge to drop.

The so-called parting surface is to open the mold and take out the surface of the product. The choice of fractal surface is also the mold design, which is affected by many factors such as product shape, appearance, wall thickness, dimensional accuracy, and the number of holes. Whether the selection of the parting surface of the mold is reasonable is related to the life of the mold, the structure of the mold and the molding of the plastic parts, which are all very important links.
​ 1. It is beneficial to the processing and manufacture of plastic mold inserts, inner molds or other molding parts. Conducive to plastic mold matching.
2. The parting surface of the plastic mold should be as simple as possible without skipping too much. If there are too many steps, not only the processing of injection mold parts is difficult, but also the difficulty of clamping the mold will be greatly increased.

Selection of plastic mold gap. The die gap is related to the die material and thickness. Not having a reasonable interval can lead to the following problems:
(1) If the gap is too large, the burr of the stamping part is relatively large, and the stamping quality is poor. If the gap is too small, although the punching quality is good, the die wear is serious, the die life is greatly reduced, and the punch is prone to breakage.
(2) If the gap is too large or too small, it is easy to cause bonding to the punching material, resulting in the formation of strip-shaped material during punching. If the gap is too small, a vacuum is likely to be formed between the bottom surface of the punch and the plate, and the waste material will rebound.