The correct way is to clamp the mold at the same time with the pressure block between the AB plates of the mold base. Unreasonable exhaust requires excessive pressure.

First of all, we must understand that unreasonable exhaust will produce the following disadvantages: 　gas accumulation will erode the mold surface and parting line; 　　2, color problem: color difference occurs, making the color black or bright; 3. The only thing that causes excessive exhaust and blows the front is that the air groove is too deep. Slots, if you must use a spherical milling cutter, you must calculate clearly that the processing depth is consistent with the depth processed by the flat bottom before it can be used. mold. In fact, the opposite direction is correct. One of the most common misconceptions is that too much exhaust will cause the front to blow. A good mold should have good airtightness and ensure the free discharge of gas, rather than the gas being highly compressed. Online pressure compensation.

Deep bone position, column position, small needle dispensing position or thin glue position must be specially considered for exhaust, or use flat thimble, semi-needle structure or exhaust steel, or even vacuum exhaust device. For the molds of the front and rear mold inserts, the front and rear small household appliances OEM mold core materials cannot be closed before the mold base parting surface is closed. Therefore, for safety reasons, we set the standard as 3mm, the exhaust depth depends on the molding material, if in doubt, please refer to the processing specifications. The length of the exhaust seal is the most easily overlooked by most people, and it is related to the proper exhaust , On this issue, there are many different size regulations. Mold exhaust can represent the overall structure of the mold to the greatest extent. Use a flat-bottomed milling cutter to process the exhaust as much as possible.　　

I hope my introduction is useful to you. This is especially important for large plastic parts. It is impossible to make the product meet the standards required by customers; 　 　 5.　　 So what should I pay attention to? A part cannot be exhausted too much, although the parting line can be done, this will bring the following problems related to exhaust: there is not enough steel to bear the pressure on the parting line, and the exhaust is pressed on the parting surface ; The best exhaust will eventually disappear. It makes the work of technicians, QA, operators and mold room personnel more difficult. It will produce too many bonding lines (this bonding is not strong and unsightly ); 　 

Generally, the temperature in the feeding section of the first stage screw should be higher in order to make the material melt as soon as possible, and the temperature in the exhaust section should be as low as possible within the allowable range. The most prominent, not only low Molecular volatiles, and when in contact with air, it is easy to absorb moisture.　　Exhaust injection molding machine and ordinary injection molding machine are mainly the difference between the pre-plastic process and its plasticized parts. During the operation, production interruption should be avoided as much as possible to prevent material degradation due to long-term stagnation. Exhaust injection molding has significant economic and social benefits: First, it eliminates the attached drying equipment and the plant area occupied by it, reduces the use of electricity for heating and drying, saves energy consumption, and improves the quality of the product, and the appearance quality is good , Dimensional stability, reduce scrap rate.　　

The basic process that the material goes through in the vented barrel is: plastic melting→compression pressurization→melt material decompression→gas expansion in the melt→exhaust→the material after exhaust is compressed again→measure. By the 1970s, the vented injection molding machine began to be developed, and the vented injection molding process was used to process products with high sub-content and volatile matter. In recent years, due to the promotion of energy saving and environmental protection, exhaust injection molding has been raised to a new level.　　4, can be processed and recycled materials and raw materials stored under bad conditions., affecting the external quality, and reducing the mechanical properties of the product, and affecting the internal quality.When many plastics leave the factory, there will be a small amount of monomers, fluxes and other low molecular volatiles, such as nylon (PA), polymethylmethacrylate (PMMA), polycarbonate (PC), etc.　　2.　　The advantages of vented injection molding: 　　1, can remove volatile substances to a minimum, improve the mechanical properties of the product, and improve the appearance quality.　　

Process notes: 　　1, the most important parameter of the exhaust injection molding process is the temperature of the barrel, especially the temperature of the decompression section.. Therefore, ordinary injection molding must be dried.　　3, the material does not need to be dried, reducing drying equipment, saving time and saving electricity. Monomers, solvents, and moisture will Plastic Injection Molded Automotive Parts turn into gases at the processing temperature, causing difficulties in processing, producing silver wires, stains, clouds, bubbles, etc.　　2, reduce defective products and increase production capacity

What are the main tests for the accuracy of injection mold processing

High machining accuracy means small machining error, and vice versa. First, the equipment used must be constantly updated.

Machining accuracy is measured by tolerance grade, the smaller the grade value, the higher the accuracy; the processing error is expressed by numerical value, the larger the value, the greater the error. From the perspective of the function of the part, as long as the machining error is within the tolerance range required by the part drawing, the machining accuracy can meet the requirements. The second is the level of processing technicians, and finally the attention to details of the process. If we want to undertake some high value-added injection mold Plastic Injection Molded Automotive Parts projects, we have to improve the accuracy of mold processing.The better the quality of the injection mold, the higher the accuracy. Ideal geometric parameters, for size, is the average size; for surface geometry, it is an absolute circle, cylinder, plane, cone, and straight line; for the mutual position between surfaces, it is absolutely parallel . The deviation of the actual geometric parameters of the part from the ideal geometric parameters is called the machining error.

What are the main tests for the accuracy of injection mold processing? 　　 1. The above are the three points that our njection mold manufacturer introduces to you about the accuracy of injection mold processing, and I hope to help all workers..Vertical, coaxial, symmetrical, etc.　　2. As for the requirements of technicians, the precision of injection mold processing is not only better than equipment, but also the level of users.　　3, is the core part, the actual size, shape, and position of the surface of the part after the injection mold is processed, and the degree of compliance with the ideal geometric parameters required by the drawing. This is the common sense of injection mold processing, but how to ensure the accuracy of processing, injection mold The manufacturer will give you a detailed explanation today.　　 Summary: The actual parameters obtained by any machining method will not be absolutely accurate

The mold material must have good dimensional stability for injection molding, and it is best to select appropriate tool steel for heat treatment. Another kind of mold is a mold for mass production. Under normal circumstances, this kind of mold has a life of 100,000 to 200,000 processing of plastic products molds. Cavity. This kind of mold material is more than double the processing technology, material and processing cost after heat treatment, and the production capacity exceeds one million times. Cavity surface friction, if the material is not worn, it will wear quickly and the quality of the plastic will be lost.

The surface gloss and accuracy of injection molded plastics with good wear resistance are directly related to the wear resistance of the surface of the injection mold cavity, especially some plastics add glass fiber, inorganic fillers and pigments, and they flow with the plastic melt and flow at high speed.

The mold must be sprayed with rust inhibitor after production. Production is non-stop all day long, which requires high mold life. Reduce the possibility of rust in the cavity and core. Mainly used for small batch injection processing, usually referring to 100-2000 pieces per processing..

Therefore, the mold material must be corrosion resistant.The classification of plastic molds and what should be paid attention to when choosing plastic molds? There are two main types of plastic mold injection production. One is a conventional plastic mold. This kind of mold has a long life, basically it won't come down after being hung on the injection molding machine

The performance requirements put forward the following requirements: 1. Hardening and other treatments are sufficient, while molds for thermosetting plastic molding must be hardened. Good quenching performance and small deformation:

Generally, the mold for thermoplastic plastic molding is quenched and tempered. First of all, the impurities in the steel The amount of materials should be as small as possible, and there should be no bubbles, and the microstructure should be uniform. The steel must have the performance of easy cutting. 4. Good wear resistance and toughness: Plastic molds have long-term thermal alternating load, and long-term friction.

Mold manufacturers are specifically The performance requirements put forward the following requirements: 1. Hardening and other treatments are sufficient, while molds for thermosetting plastic molding must be hardened. Good quenching performance and small deformation: most of the cavity part of the plastic mold must be heat treated, which requires the steel to have good hardenability and small deformation. When choosing steel, If other conditions can be met, this condition is the basis for the final selection. Excellent polishing performance: No matter what kind of plastic mold, the allowable surface roughness of the cavity is very small, almost all require mirror gloss. Good surface corrosion processability: Many molds require the surface of the molded plastic parts to be patterned with various other materials, such as leather,

When the mold is made of high-carbon and high-alloy steel, insufficient toughness will inevitably lead to cracking.The manufacturing cost of plastic molds is high, and the material cost only accounts for a small part of the mold cost. Therefore, when selecting steel, steel grades with good process performance, stable performance and long service life should be selected first. Excellent machining performance: The geometry of the cavity of the plastic mold is very complicated, and it is required to process deep holes, deep grooves and other difficult-to-machine parts. To achieve mirror gloss, the steel must have good hardness. 5. This requires the texture of the steel to be fine and uniform, otherwise it will corrode The result is not good. The surface roughness of the mold used in mass production is also an important condition

Through the efforts of generations of mold designers and developers, following the trend of historical development, the molds of die-casting mold parts have also taken a new development direction.

The mold development direction of modern die-casting mold accessories: From the primitive society to the industrial information age, the tools are changing rapidly in people's daily life production. From pure manual to intelligent automation, there have been more and more perfect standards.

With the development of society, modern die-casting mold parts also have special requirements for molds and high speed injection molding processnew development directions. 1. Plastic mold parts processing mold forming parts are becoming larger and the high productivity of the parts requires one mold with multiple cavities, resulting in increasingly large molds. Large-tonnage large molds can reach 100 tons, and a mold has hundreds of cavities and thousands of cavities. It requires a large worktable for mold processing equipment, increased Y-axis and Z-axis travel, large load-bearing, high rigidity, and high consistency. 2. For complex cavities and multi-functional composite molds, as the shape of the part becomes more complex, the design and manufacturing level of the mold must be improved. Multiple grooves and multiple materials are formed in a mold or assembled into multiple components. Functional composite molds require a large amount of processing programming,

The mold steel material used for mold processing has high hardness, which requires mold processing equipment to have thermal stability and high reliability. 4. The combination of plastic mold parts processing technology and green product technology will be taken into consideration when enterprises purchase equipment. Radiation and media selection will be factors affecting safety and environmental protection. EDM milling technology will be developed in the field of mold processing in the future. 5. The composite application of multiple measurement technologies, high-speed measurement and reverse engineering have become the development direction that promotes mold participation in product development and design technology.