What is the material forming method of plastic molded parts manufacturer?
Beginner’s Guide to learn basic plastic molding methods
What is plastic molding? Plastic molded parts manufacturer
Plastic molded parts manufacturer uses plastic molding in silicone to obtain strong products of any complexity and design. The thickness of the elements obtained can also be different, as well as the volume.
Furthermore, special molds are used for work. Which allow reproducing several hundreds or thousands of identical elements. The methodology is used by enterprises and individuals for small-scale and large-scale production.
The so-called color-changing substance produced by Plastic molded parts manufacturer
Molding is the process of making various forms of polymers like:
- Powders
- Pellets
- solutions or dispersions
into products of the desired shape. It is the most important in the entire process of plastic material molding and processing. It is the production of all polymer materials or profiles the necessary process. Plastic molding methods include the following:
- extrusion molding
- injection molding
- compression molding
- transfer molding
- lamination molding
- blow molding
- calendar molding
- foam molding, thermoforming, etc.
Various molding methods have their adaptability which are introduced by Plastic molded parts manufacturer
What happens when the molded product changes color?
The so-called color-changing means, that the chemical properties of some substances contained in the molded product may change.
The reason for the color-changing needs to be considered according to various constituent substances. Plastics are composed of several of the following 5 substances:
(1) polymers (resins)
(2) stabilizers
(3) performance-imparting substances
(4) filler
(5) other resins.
Plastic molded parts manufacturer Discoloration of polymers
Many products made by Plastic molded parts manufacturer hardly have the problem of discoloration of ” polymer. In organic substances, because the structure of the color is limited, it can be judged whether it is prone to a certain degree of discoloration according to the structure of the polymer.
For example, it is known, the basic skeleton of resins. Such as urethane series is easy to form covalent double bonds. So it is susceptible to discoloration due to ultraviolet rays and other factors.
Plastic molded parts manufacturers stabilized properties
The stabilizer added to the color-changing resin material has some properties. It absorbs the light energy of ultraviolet rays and other substances or captures free radicals.
Since ultraviolet energy and free radicals will decompose the polymer, their stabilizers are used instead of polymerization React to prevent the deterioration of the polymer. However, the more effective the stabilizer the more likely it is to change color after the reaction.
Especially the quinone type and other stabilizers formed by Plastic molded parts manufacturer with an aromatic or fluorine ring structure. Although, there are the most varieties and the best performance on the market but the discoloration is also the most obvious.
Plastic molded parts manufacturer Performance-imparting substances
The performance-imparting substances differ in their properties and methods of use. So, Plastic molded parts manufacturers should judge individually and cannot be generalized.
What is the function of the Filler?
Many fillers can be said to have almost no problem with discoloration. Such as:
- engineering plastic glass fiber and
- Mineral fillers.
However, in glass fiber and other materials sold as products, a small amount is added due to that addition. So these resins have the possibility of discoloration due to thermal degradation, although this possibility is very small.
(5) Other resins
The discoloration problems of other resins are basically the same as:
- In summary, the substance most likely to cause discoloration is a stabilizer. However Plasticmolded parts manufacturer uses it in order to prevent the deterioration of the polymer.
- At present, stabilizer manufacturers are still developing stabilizers with higher effects and less discoloration. At the same time, many resin and plastic molded parts manufacturers are also studying ways to better use stabilizers.
Factors involved in Plastic molded parts manufacturers resins
The factors that cause discoloration of materials can be summarized as follows:
- Caused by thermal energy.
If the resin is thermally decomposed in a high-temperature environment, free radicals are sometimes generated. Furthermore, in general, if the resin stays in the molding machine barrel for a long time. Then tar-like substances will be generated. Causing the color changes to brown or black.
The daylight caused by light energy do not need to repeat. Even fluorescent lamps emit ultraviolet rays. If placed in this environment for a long time, the resin will change color due to the action of ultraviolet rays.
Because the nature of the stabilizer reacts, the color ranges from yellow to Between brown. The amount of energy absorbed varies depending on the color of the molded product created by plastic molded parts manufacturer. The speed of discoloration also varies depending on the color of the molded product.
Plastic molded parts manufacturers mechanical energy
Sometimes the mechanical energy becomes heat energy, causing resin discoloration. Specifically, when the molding machine wants to forcefully transfer the resin without sufficiently heating the resin in the metering area
What are the ways of Plastic molded parts manufacturers discoloration countermeasures?
- Discoloration caused by molding
The biggest factor of plastic molded parts manufacturer discoloration during molding is the retention of resin in the cylinder. To this end, measures can be taken to shorten. The residence time of the resin and take measures to fully replace the resin after a long period of storage.
Because of the higher the temperature, the greater the retention, and color change. So, the key is to not increase the barrel temperature excessively. Furthermore
- The color change caused by light
The color change caused by light is used indoors and it is very slow. If it is a daily necessity, etc. A plastic molded parts manufacturer probably be ignored. At this time, it is helpful special attention is paid to fluorescent lamps.
For example, when storing products in warehouses and other places. It is best to block the light to avoid direct irradiation. And to turn off the fluorescent lamps at any time. When used in places where direct sunlight is shining outdoors and in automobiles.
It is recommended to choose weather-resistant products by plastic molded parts manufacturers.
Electrons usually exist in pairs within the atom. However, in very rare cases, such paired electrons are destroyed by the action of heat and light. And exist in a separate form.
The atom or atomic group containing this electron is called Free radicals. Free radicals have high activity and are extremely unstable. Once produced, they will quickly decompose the substance or react with other substances.
When the free radicals react with the resin, they often decompose their main chain, which reduces their mechanical properties.
The material forming method of plastic molded parts manufacturer
It is an important part of the part design. It is also a problem that plastic molded parts manufacturers are extremely concerned about. And it is also a key factor in the material processing process.
In addition to injection molding, plastic molding also has extrusion molding. Such as:
- sheets and pipes
- Blow molding, such as mineral water bottles.
But no matter what molding method, there should be a “limited” way of existence. This thing you can Understanding as a mold. Compared with other molding methods, injection molding is undoubtedly the most common processing method among molding methods
What are the molding methods of plastic molding machines? Plastic molded parts manufacturer
Plastic molding machine processing is engineering technology. which involves various processes for converting plastics into plastic products. During the plastic molded parts manufacturer transformation process, one or more of the following conditions often occur. Such as the rheology of the polymer and changes in physical and chemical properties.
The main equipment for compression molding and compression molding is a press and a mold. Presses are self-contain hydraulic presses, with tonnages ranging from tens of tens to hundreds of tons.
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