Guida per principianti per imparare i metodi di stampaggio della plastica di base

Cos'è lo stampaggio di plastica? Produttore di parti stampate in plastica

Il produttore di parti stampate in plastica utilizza lo stampaggio di plastica in silicone per ottenere prodotti resistenti di qualsiasi complessità e design. Anche lo spessore degli elementi ottenuti può essere diverso, così come il 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
• stampaggio a iniezione
• 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 Il produttore di parti stampate inwith 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:

1. 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.
2. Al momento, i produttori di stabilizzatori stanno ancora sviluppando stabilizzatori con effetti più elevati e meno scolorimento. Allo stesso tempo, molti produttori di parti stampate in stanno anche studiando modi per utilizzare meglio gli stabilizzanti.

Fattori coinvolti nelle resine dei produttori di parti stampate in plastica

I fattori che causano lo scolorimento dei materiali possono essere riassunti come segue:

• Causato dall'energia termica.

Se la resina viene decomposta termicamente in un ambiente ad alta temperatura, a volte vengono generati radicali liberi. Inoltre, in generale, se la resina rimane a lungo nella canna della macchina formatrice. Quindi verranno generate sostanze simili al catrame. Causando il colore cambia in marrone o nero.

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?

1. Discoloration caused by molding

The biggest factor of produttore di parti stampate in plastica 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

2. 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 produttore di parti stampate in plastica 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 produttori di parti stampate in plastica.

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 produttori di parti stampate in plastica 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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