Problems to be aware of when selecting mold materials for custom plastic molding in China

Principle of selecting mold material is based on processing batch, mold manufacturing process, and processing object in moulding die design. For ordinary molds that are easy to deform and break, high-strength and high-toughness carbon tool steel should be selected. For punching molds with easy edge wear, material with high hardness, wear resistance, good processing performance, small deformation and high hardenability during heat treatment quenching should be used. Main failure mode of stamping die is surface peeling caused by surface fatigue crack, steel with good surface toughness is used; material with particularly low friction coefficient is suitable for drawing die; hot forging die requires material with strong toughness, strength, wear resistance to cold and heat fatigue, alloy tool steel is more suitable; for die-casting molds subjected to cyclic thermal stress, hot work die steel with high heat fatigue, high temperature environment should be selected; plastic mold should use materials that are easy to cut, have a dense structure and a good surface finish; when designing punch and die, matching of molds with different hardness or different materials should be considered to prolong their respective life. In addition, selected mold material should have a weak affinity with finished part to prevent part from sticking to mold, wear parts of mold, and shorten service life of mold.

Problems that need to be solved in mold manufacturing process of plastic parts

Mold manufacturing process refers to molding process, heat treatment specifications and surface treatment technology. In order to ensure life of mold, mold manufacturing process should also be mentioned as a very important position, and factors affecting its service life are mainly processing method and precision for mold manufacturers in china.

(source:https://www.hthc-tech.com/analysis-of-methods-to-improve-service-life-of-molds-2/）

Plastic cloth hanger must be strong and at the same time non-brittle, must have some flexibility. The cloth hanger we are using at home are made from PE, PP, and PC. It is usually made via a way called plastic injection molding. Therefore, it is a home Appliance molded parts. Here it is the details:

Processing of plastic:
Plastic granules are melted and pressurized into a tool called mold. A mold is template or pattern that gives the plastic melt a desired form.Plastic granules are melted and pressurized/injected into mold by help of a machine called injection molding machine.

Mold of plastic hangers are shown below:

Typical Injection molding machine is shown below:

At present, energy conservation and environmental protection have become the development trend of plastic and rubber industry. Green plastic parts industry and its application are also receiving increasing attention. As a representative of emerging materials, CPVC has lower cost and better products, and the safety and closure of products have been improved to a greater extent. Lightweight technology will also bring great convenience to the development of the Plastic Injection Molding industry. In the future, lightweight materials will be widely used in automobiles, airplanes and rail transit. Precision is an embodiment of processing technology of plastic products industry, which is of great significance to the industry. Clean production and ecological, for the plastics industry to create a new level of energy conservation and emission reduction.

What about injection molding? Can be simply understood as the melting of plastic particles, into the mold cooling shape. Injection molding: thermoplastic injection molding is the process by which a plastic material is melted and then injected into a membrane cavity. Once the molten plastic enters the mold, it is cooled and molded into a certain shape. The resulting shape is often the final product(injection molded parts), and no further processing is required before installation or use as the final product. Many details, such as raised parts, ribs, and threads, can be molded in one step by injection molding.

1. High space utilization. To save space, plastic furniture can be reasonable arrangement, sweet and comfortable.
2. Good moisture resistance. Simple and easy plastic furniture has the space of a paragraph of distance with the ground commonly, like the office equipment plastic parts can effective waterproof, at the same time space of interval, also can place shoe shoes box to be able to object, to the room with insufficient space, the effect is quite good.
3.Affordable, general simple plastic furniture price between 100-1000 yuan. Move to compare the whole furniture price of thousands of person on market more substantial.
4. Various styles are the only choice for those who pursue personalized life and even like DIY operation.

(source:https://www.hthc-tech.com/advantages-of-plastic-furniture/)

First, large Plastic Injection Molding processing in the production, must be produced after a period of time in gradually improve the feed tube temperature, mainly because of just powered on the melt injection molding machine material tube with heating time is long, low melt viscosity, good fluidity, the product easy to run front, production after a period of time due to the melt constantly take heat away, cause insufficient melt, viscosity, liquidity is poor, make the products lack of glue.
Second, use three points into the glue so that the product into the glue evenly, to prevent the production of oval. When remanufacturing metal inserts, preheat the inserts to prevent cracking of the inserts.
Third, for the brittle phenomenon of products, increase the proportion of new materials and reduce the number of times to solve it, generally no more than three times.

With the development of automobile manufacturing technology, many auto parts are injection molded parts, which has resistance to stretch, impact and bending, with better functional performance.
In order to ensure the quality of auto injection parts, series of tests are required after the production. Usually, the parts need to be immersed in water for 4 hours, keeping water temperature at 60 degrees, and then special tools are used for testing. If there is no big change in size, the quality of the product is good, otherwise the injection parts are not up to standard.
How can this situation be improved? On the one hand, reducing the mold temperature and extend the cooling time; improving the injection pressure, or the production on the other hand.

It is made by plastic injection molding machine.
Plastic hangers is made by plastic injection molding machine, with advantages of environmental friendly, energy saving, high production efficiency and low cost. Plastic hangers are mainly made of ABS plastic parts, the shapes are divided into two categories. One is with a flat and long frame, and a relatively narrow cross section. The inclined slope of the frame is small, and its shape is light and thin, which is more suitable for drying light clothes.

1. The color of child safety seats made by blow molding is generally black. The surface of seats is rough with particulate matter, which is not smooth to the touch. The surface of the injection molding is smooth and flat, and the color is usually light.
2. Since the blow molding child safety seat is hollow, while the injection molding seat is solid, there is a big difference in weight. The net weight of blow molding product is generally no more than 15kg, while injection molded parts is generally more than 20kg.
In general, injection molded child safety seats have better compression resistance and flexibility, so they are safer and more comfortable, but they are also much more expensive. Parents can choose seats according to their actual situation and spending power. Even if choosing blows molding product, it have to be specialized factory to manufacture which passes the safety test.
As an Plastic Injection Molding child safety seats manufacturing enterprise for several years, suzhou huitong huichuang technology Co., LTD. provide with exquisite technology in the past 20 years of long-term supply stability, that meet your needs in Consumer Electronics plastic parts processing and assembly, if you are interested please contact Mr. Xu at yong@htsj.com.cn.

One, strong and durable. ABS material is injection molded parts with high strength, wear and scratch resistance, erosion (anti – alkali, etc.).
Two, simple structure. The bedside cabinet consists of cabinet body, cover, cabinet door, drawer, pull plate, towel rack, etc.
Three, convenience. ABS bedside table is designed for convenience, we should pay attention to the difference in the choice of bedside table. Abs bedside cabinet has the characteristics of beauty, lightness, firm structure and so on. It is widely used in various hospitals, rest homes, nursing homes, health centers and other treatment units.

(source:https://www.hthc-tech.com/what-advantages-does-abs-bedside-table-have/)