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Jug Mould
The plastic can be pure resin or a mixture with various additives. The resin acts as a binder. The purpose of adding additives is to improve the physical and mechanical properties of pure resin, improve processing performance or to save resin.
Therefore, the most basic Plastic medical mould physical and chemical properties of plastics are determined by the properties of the resin. Resin can be divided into natural resin and artificial resin, the latter is also called synthetic resin.
Resins are all polymers, these polymers have unique molecular internal structure and molecular external structure. The internal structure of the polymer determines the most basic physical and chemical properties of the polymer; the external structure of the polymer determines the processing and physical mechanical properties of the polymer.
Polymers can be divided into non-crystalline (amorphous), semi-crystalline and crystalline according to the structural morphology between the chains after solidification. Therefore, plastics are also divided into amorphous and crystalline types.
When the crystalline plastic is solidified, there is a process of nucleation to crystal grain formation, forming a certain body state. Such as PE, PP, PA, POM, etc. are all crystalline.
When amorphous plastics solidify, the growth process without crystal nuclei and crystal grains is just the "freezing" of free macromolecular chains such as PS, PVC, PMMA, PC, etc.
According to the reflection of its plastics on heat, it can be divided into two types: thermoplastics and thermosetting plastics: Thermoplastics are characterized by being softened by heating and returning to solid state when cooled. This reversible process can be repeated many times. Such as: PS, PVC, PA, PP, POM, etc.; while thermosetting plastics are characterized by being transformed into plastic melts at a certain temperature, but if you continue to increase the temperature and extend the heating time, the inside of the polymer will undergo cross-linking and solidify. It can no longer be softened to the original state by heating, and can not be processed repeatedly. Such as: epoxy, furan, amino, phenolic, etc.
Garbage bin mould
It is a method in which the plastic material is first heated and melted in the heating barrel of the injection molding machine, and then the melt is pushed into the cavity of the closed mold by the reciprocating screw.
It can not only produce high-precision, high-quality products under high productivity,Bucket mould but also has a wide variety of plastics that can be processed, a large output (about 1/3 of the total amount of plastic) and a wide range of uses. Therefore, injection molding is an important part of plastic processing One of the molding methods
Extrusion molding
Extrusion is a method in which the plastic is continuously passed through the die in a flowing state by heating and pressing in an extruder.
It is generally used in the molding of plates, pipes, monofilaments, flat wires, films, wire and cable coatings, etc., with a wide range of uses and high yields. Therefore, it is one of the important molding methods in plastics.
Foam molding
It refers to the addition of suitable foaming agents to the foaming materials to produce porous or foamed products. The foamed products have low relative density, high specific strength, low raw material consumption, sound insulation, heat insulation and other volt points. There are PVC, PE and PS etc.
Products include: films, sheets, pipes, and profiles, etc. Foaming can be divided into chemical foaming and physical foaming.
Blow molding
Blowing (expanding film) molding (or hollow blow molding) refers to a molding method in which the hot thermoplastic parison or sheet in a closed mold is inflated into a hollow product by means of fluid (compressed air) pressure.
Plastic containers produced by this method. Such as various bottles, square, round or flat barrels, gasoline tanks, etc. have been widely used, and newly developed various industrial parts and daily products, such as double-walled box-shaped products, L-ring large drums. Stacking boards. Surfboards. Seat backs and desks, as well as front spoilers for automobiles, belt covers, instrument panels, air-conditioning vent pipes, etc., which have been applied in practice and processed materials From daily-use plastics to engineering plastics, blow molding has become one of the important molding methods in plastic processing.
After the general plastics are synthesized, they are all flour-like powders coming out of the synthesis towers of large petrochemical plants, which cannot be used to directly produce products. This is what people often say that the components of fat extracted from tree sap are the same. Plastic medical mould Known as resin powder, this is a pure plastic with poor fluidity, low thermal stability, easy aging and decomposition, and not resistant to environmental aging.
In order to improve the above defects, heat stabilizers, anti-aging agents, anti-ultraviolet agents, plasticizers, etc. are added to the resin powder. After granulation modification, its fluidity is increased, and the resin powder is produced to adapt to various processing techniques. Plastic varieties with special properties and different grades. Therefore, there are many grades of the same type of plastic. According to the processing method, there are injection molding grade, extrusion grade, and blown film grade; according to performance, there are high rigidity, toughened, etc. .
The plastic materials commonly used by medical device manufacturers are plastic particles that can be used directly after modification. For products with special properties that are not available in the market, equipment factories can introduce granulation production lines and process and produce plastic granules through different formulation designs.
Since it is in contact with the liquid medicine or the human body, the basic requirements of medical plastics are chemical stability and biological safety. In simple terms, the components in the plastic material cannot be precipitated into the liquid medicine or the human body, will not cause toxicity and damage to the tissues and organs, and are non-toxic and harmless to the human body. In order to ensure the biological safety of medical plastics, medical plastics usually sold on the market are certified and tested by medical authorities, and users are clearly informed which grades are medical grade.
According to the structure and strength requirements of the equipment products, we choose the appropriate plastic type and the appropriate brand, and determine the material processing technology. These properties include processing performance, mechanical strength, use cost, assembly method, sterilization and so on. The processing properties and physical and chemical properties of several commonly used medical plastics are now introduced.
The plastic can be pure resin or a mixture with various additives. The resin acts as a binder. The purpose of adding additives is to improve the physical and mechanical properties of pure resin, improve processing performance or to save resin.
Therefore, the most basic physical and chemical properties of plastics are determined by the properties of the resin. Resin can be divided into natural resin and artificial resin, the latter is also called synthetic resin.
Resins are all polymers, these polymers have unique molecular internal structure and molecular external structure. The internal structure of the polymer determines the most basic physical and chemical properties of the polymer; the external structure of the polymer determines the processing and physical mechanical properties of the polymer.
Polymers can be divided into non-crystalline (amorphous), semi-crystalline and crystalline according to the structural morphology between the chains after solidification. Therefore, plastics are also divided into amorphous and crystalline types.
When the crystalline plastic is solidified, there is a process of nucleation to crystal grain formation, forming a certain body state. Such as PE, PP, PA, POM, etc. are all crystalline.
When amorphous plastics are solidified, the growth process without crystal nuclei and crystal grains is just the "freezing" of free macromolecular chains such as PS, PVC, PMMA, PC, etc.
According to the reaction of plastics to heat, it can be divided into two types: thermoplastics and thermosetting plastics: Thermoplastics are characterized by being softened by heating, and returning to solid state when cooled. This reversible process can be repeated many times. Such as: PS, PVC, PA, PP, POM, etc.; while thermosetting plastics are characterized by being transformed into plastic melts at a certain temperature, but if the temperature is continued to increase, and the heating time is extended, the inside of the polymer will undergo cross-linking and solidification. It can no longer be softened to the original state by heating, and can not be processed repeatedly. Such as: epoxy, furan, amino, phenolic, etc.
What is the mold used to make a resin table?
1. What is the mold used to make the resin table?
A typical fence structure can be done. Because the river table is mostly in the form of a board surface and not very thick, it can generally be made without any special molds. You can find some pvc boards or other flat boards as frame fences, both are ok. If you use glass plates or metal plates, you can use some mold release materials, such as mold release wax, for smoother demolding.
What is the mold used to make a resin table?
2. What material is used to make resin mold?
A typical resin glue mold is referred to as a glass fiber reinforced plastic mold, or glass fiber mold, which is generally composed of glass fiber and resin hand-laid laminated composite.
The main materials of the resin glue mold are glass fiber, resin glue and mold gel coat. Other materials include some mold release wax, curing agent, polishing wax and so on. Glass fiber has 30g surface mat without alkali, 300g chopped strand mat and 400g gingham cloth. The resin includes vinyl resin or unsaturated resin and epoxy resin, etc. The mold gel coat generally uses vinyl system.
If you want to know the specific mold materials to be used, it is recommended that you contact your local composite material distributor. Generally, they will provide you with a complete list of mold making materials based on your actual situation.
. The underdevelopment of the mold industry will seriously affect the production of manufacturing products such as automobiles, IT and electronic technology products, mechanical and electrical products, aviation (sky), ships, building materials, and household appliances.
Moulds are special forming tools and special tooling for forming manufacturing product parts (including stamping parts, plastic parts, forgings, rubber parts, glass and ceramic parts, etc.), as well as special technical products.
The mold will be specially designed and manufactured according to the technical requirements and production batches of the shape, size and dimensional accuracy, surface quality of the manufacturing product parts.
Therefore, study the modern design and manufacturing technology of molds, study the practical experience in the mold design and manufacturing process, and the technical management and process control of the production process, and form a standard, form an expert system, which is helpful to improve the mold production technology and management level, Improving the core competitiveness of mold companies will be of utmost importance.
Modern mold production method and production process
Before the 1930s, simple tools and equipment were used to form a workshop-style production method of hand-made molds. During this period, only simple molds can be manufactured. The manufacturing accuracy and quality of molds are completely dependent on manual skills and practical experience.
From the 1930s to the late 1970s, it was the development process of industrialized production methods for molds. Its main achievements and characteristics are:
Widely use milling process, precision forming and grinding process, and realize round hole and shape with precise pitch
EDM processing technology and NC wire EDM processing technology are widely used, providing key processing technology for high-hard materials.
Realize the specialization, serialization and standardization of mold materials.
In the meantime, the high development of mold standardization, the comprehensive use of standard parts and components for design and manufacturing in mold production, is not only a major achievement and feature of the industrialized production method of molds, but also an important technical basis for realizing modern mold production methods.
With the progress and development of the computer and machine tool industry, since 1980, mold CAD/CAM and CAD/CAM/CAE have become widely used production technologies. They cooperate with the high degree of standardization to form a modern mold production method, that is, an informatized and digital mold production method that realizes mold design and manufacturing.
Taizhou Huangyan Jtp Mould Co.,ltd is known as one of the best China Plastic Bucket mould Manufacturers and Plastic Bucket mould factory for plastic household items