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Plastic Injection Mold Has Great Superiority
Oct 13, 2017

Injection mold is a tool to produce plastic products, but also to give plastic products complete structure and precise size tools. Injection molding is a kind of processing method used in mass production of some complicated shape parts. Specifically refers to the melting of plastic by injection molding machine high-pressure injected into the mold cavity, after cooling solidification, to get the forming products.

Although the structure of the mould may be changeable due to the variety and properties of plastic, the shape and structure of plastic products and the type of injection machine, the basic structure is consistent. The mold is mainly composed of pouring system, thermostat system, forming parts and structural parts. wherein the gating system and the molded parts are directly contacting with the plastic, and vary with the plastic and the products, is the most complex in the plastic mold, the change is the biggest, requires the processing smoothness and the highest precision part.

The injection mold is composed of two parts, the dynamic mode and the fixed die, the movable mould is installed on the moving template of the injection molding machine, and the fixed die is installed on the fixing formwork of the injection moulding machine. During injection molding, the casting system and the mold cavity are formed by closing the die and fixed die, and the mould is separated to remove the plastic products. In order to reduce the heavy mold design and manufacturing workload, most of the injection mold used a standard mold frame.

Mold Maintenance

1, the processing enterprise should first give each pair of mold to equip the resume card, detailed records, statistics of its use, care (lubrication, cleaning, anti-rust) and damage, according to which parts, components have been damaged, the degree of wear and tear to provide information to detect and solve the problem, as well as the mold molding process parameters, products used materials, To shorten the commissioning time of the mould and improve the production efficiency.

2, processing enterprises should be in the injection molding machine, the normal operation of the mold, testing the various performance of the mold, and the final molded plastic parts size measurement, through this information to determine the existing state of the mold, to find the cavity, core, cooling system and the breakdown of the type, such as the damage, according to the information provided by plastic parts, Can determine the mold damage status and maintenance measures.

3, to the mold several important parts to carry on the key tracking detection: The role of the ejection and guide parts is to ensure the mold opening and closing movement and plastic parts top out, if any part of the damage caused by the card, will lead to discontinued, it should always keep the mold thimble, guide column lubrication (to choose the most suitable lubricant), and regularly check the thimble, Whether deformation and surface damage occurred in the Guide column, once found, to be replaced in a timely manner, after completion of a production cycle, the mold work surface, movement, guide parts coated professional anti-rust oil, especially on the gear, rack die bearing parts and spring mold elastic strength protection to ensure that it is always in the best working condition ; As the production time continues, the cooling channel is easy to deposit scale, rust, silt and algae, so that the section of the cooling runner becomes smaller, the cooling passage narrows, the heat exchange rate between the coolant and the mould is reduced greatly, and the production cost is increased, so the cleaning of the convection channel should be paid attention to; for hot runner die The maintenance of heating and control system is very important to prevent the occurrence of production failure. Therefore, each production cycle after the end of the mold with the belt heater, rod heaters, heating probes and thermocouples, such as the use of ohmmeter measurement, such as damage, to be replaced in a timely manner, and the mold resume to compare, do a good record, so that timely detection of problems, to take countermeasures.

4, to pay attention to the surface of the mold maintenance, it directly affects the surface quality of products, the focus is to prevent corrosion, therefore, choose a suitable, high-quality, professional anti-rust oil is particularly important. When the mold completion of the production task, according to different injection to take different methods to carefully remove residual injection molding, can be used copper rods, copper wire and professional mold cleaning agent to remove residual injection mold and other sediments, and then air-dry. Disable the removal of hard objects such as wire and steel bars to avoid scratching the surface. If corrosive injection-induced rust points, to use grinding polishing machine, and spray professional anti-rust oil, and then put the mold in a dry, cool, dust-free storage.

Application fields

Injection mold is the production of various industrial products important process equipment, with the rapid development of the plastic industry, as well as the application of plastic products in aviation, aerospace, electronics, machinery, shipbuilding and automobile industries, the requirements of the mold are more and more high, the traditional mold design method has been unable to meet the requirements of today. Compared with the traditional mold design, computer-aided Engineering (CAE) technology has great superiority in improving productivity, assuring product quality, reducing cost and reducing labor intensity.

Injection mold in the processing, all kinds of numerical control processing is useful, most applications are CNC milling and machining centers, CNC wire cutting and CNC EDM in the mold NC machining applications are also very common, wire cutting mainly used in a variety of straight-walled mold processing, such as stamping in the concave and convex mold, injection mold inserts, sliders, Electrical discharge machining electrodes and so on. For the high hardness of the mold parts, the use of machining methods can not be processed, most of the EDM, in addition to the mold cavity angle, deep cavity parts, narrow groove, etc. also use EDM processing. The CNC lathe is mainly used for processing the standard parts of the die rod, as well as the mold cavity or core of the rotary body, such as the injection mould of the bottle body and the basin type, the shaft type and the disc type parts forging die. In the mold processing, the application of CNC drilling machine can also improve the processing accuracy and shorten the role of the processing cycle.

The mould is widely used, and the product components in modern manufacturing are processed, and almost all of them need to be completed by molds. Therefore, the mold industry is an important part of the national High-tech industry, is an important and valuable technical resources. Optimizing the structure design of the mould system and the/of the type parts, and make it become intelligent, improve the molding process and mold standardization level, improve mold manufacturing precision and quality, reduce the surface grinding, polishing work volume and manufacturing cycle; research, application for various types of mold type parts used in High-performance, Easy to cut the special material to improve the performance of the mold, in order to adapt to market diversification and new product trial, the application of rapid prototyping manufacturing technology and rapid tooling technology, in order to rapidly manufacture molding die, plastic injection mold or die casting, etc., should be the next 5-20 years of mold production technology development trend.