Block Mould

Brick mold: that is to brick series machine as the core of the mold tool. Construction machinery such as a block machine, pad machine and other machines brick core. It can be produced by mold bricks needed. Such as standard brick, brick, brick bread, the Netherlands brick, grass brick, hollow brick, large tiles, Curb brick, brick-like pads, etc.. Mold is part of modern brick building green environment necessary.

This Kind of Block mould adopt heat treat ment. We can make many kinds of moulds with different shape and sizes for hollow blocks, solid blocks, curbstone and pavers.


Mold design requirements are: precise size, smooth surface; reasonable structure, high production efficiency, ease of automation; easy to manufacture, high life, low cost; designed to meet the technology needs of economic rationality.
Die structure design and parameters to be considered rigid, orientation, discharge mechanism, positioning method, the gap size and other factors. Wearing parts should be easy to replace the mold. For the plastic mold and die casting mold, also we need to consider reasonable gating system, molten plastic or metal flowing state, enter the location and orientation of the cavity. In order to increase productivity, reduce the loss of flow channel gating, can be multi-cavity mold, the mold can be completed in a simultaneous plurality of the same or different products. It should be used in mass production of high efficiency, high precision, high life of the mold.
Stamping die should adopt multi-position progressive die, carbide inserts can be progressive die, in order to improve life. In small batch production and new product trial, you should use simple structure, fast, low-cost simple mold, such as a combination of die, die plate, urethane rubber mold, low melting point alloy mold, zinc alloy die, superplastic alloy molds. Mold has begun using computer-aided design (CAD), through a set of computer-centric systems optimize the design of the mold. This is the development direction of mold design.
Mold manufacturing according to structural features, into the plane of the blanking die and mold having a cavity space. Use blanking die punch and the die size of a precise fit, some even without a clearance fit. Other die as cold extrusion die, die-casting mold, powder metallurgy mold, plastic, rubber mold cavity mold belong to the workpiece for forming three-dimensional shapes. Cavity mold in length, width and height three directions have size requirements, complex shape, make it difficult. Mold production is generally single, small-batch production, manufacture demanding, precise use of sophisticated machining equipment and measuring devices.
Available flat blanking die early EDM forming, shaping and then grinding, coordinate grinding and other methods to further improve the accuracy. Available optical projection form grinding curve grinder, or with a reduced copy, repair playing surface grinder wheel mechanism can also be formed using a dedicated tool grinding on grinding precision surface grinder. Coordinate grinding machine can be used for precise positioning of the mold in order to ensure accurate pore diameter and pitch. Also available CNC (CNC) Grinding continuous path coordinate any punch and die curve shape. Multi-cavity mold contour milling, EDM and ECM. The profiling milling and CNC applications and increase joint three-level movable head means EDM, can improve processing quality of the cavity. ECM inflatable electrolysis increased production efficiency can be improved.


Meet working conditions
 
1, wear resistance
Variability in the blank plastic mold cavity, the cavity surface along both flow and slide, so that the cavity surface generated intense friction between the blank, resulting in mold due to wear and failure. So wear resistance is essential mold, one of the most important performance.
Hardness is a major factor affecting wear resistance. In general, the higher the hardness of the mold parts, the smaller amount of wear, the better the wear resistance. In addition, the wear resistance of the type, quantity, shape, size and distribution of materials related carbide.
2, toughness
Die mostly very poor working conditions, some often bear a larger impact load, resulting in brittle fracture. To prevent mold parts suddenly brittle fracture at work, the mold should have a high strength and toughness.
Mold toughness depends mainly on the carbon content of the material, grain size and organization status.
3, fatigue fracture properties
Die working process, under the cyclic stress of long-term effects, often leading to fatigue fracture. In the form of many small energy impact fatigue fracture, fatigue fracture contact fatigue fracture tensile and bending fatigue fracture.
Fatigue fracture properties of the mold depends on its strength, toughness, hardness, and the content of the material inclusions.
4, high temperature performance
When the mold into a higher operating temperature, hardness and strength will decline, leading to early die wear or plastic deformation and failure. Thus, the mold material should have high resistance to tempering stability, to ensure that mold at operating temperature, high hardness and strength.
5, resistance to thermal fatigue properties
Some die in the course of their work repeated heating and cooling status, so that the cavity surface tension, the pressure becomes stress, causing surface cracking and spalling, increasing friction, hinder plastic deformation, reducing the dimensional accuracy, resulting in die failure. Thermal fatigue is one of the main forms of hot die failure, helped mold this kind should have a high resistance to thermal fatigue performance.
6, corrosion resistance
Some molds such as plastic at work, due to the chlorine, fluorine and other elements are present in plastics, precipitation decomposition when heated HCI, HF and other strong corrosive gases, mold cavity surface erosion, increasing its surface roughness, increased wear failure

Mold manufacturing generally go through forging, machining, heat treatment, few processes. To ensure the quality of the mold manufacturing, lower production costs, the material should have good malleability, machinability, hardenability, hardenability and can be grinding; also have a small oxidation, decarbonization sensitivity and quenching deformation cracking tendency.
1, malleable
Forging deformation resistance has a lower, plastic, forging a wide temperature range, forging crack cold cracking and network carbide precipitation tends to be low.
2, the annealing process of
Ball annealing temperature range, low annealing hardness and small fluctuation range, the ball higher.
3, machinability
Cutting the amount of large, low-loss tool, low surface roughness.
4, oxidation, decarbonization sensitivity
Antioxidant pregnant when heated to high temperatures can be good, decarbonization slow the heating medium is not sensitive to pitting tendency is small.
5, hardenability
After quenching with a uniform and high surface hardness.
6, hardenability
After quenching can get deeper hardened layer, use mild quenching medium can be hardened.
7, quenching distortion cracking tendency
Conventional quenching small volume change, shape warping, slight distortion, abnormal deformation tends to be low. Conventional quenching cracking sensitivity is low, and the shape of the workpiece quenching temperature insensitive.
8, can be grinding
Wheel relatively small loss, no grinding burn limit large amount of wheel quality and cooling conditions are not sensitive, less prone to injuries mill grinding cracks.