SINO MOULD – A Professional plastic mold making company in Zhejiang

Chinese plastic molds are developing very fast in the last 10 years and become more and more famous in the world. Customers from foreign country are fond of buying Chinese plastic molds for the reason that Chinese molds are both outstanding in the mold quality and competitive price.

China famous plastic mold maker are distributed mainly over Yangtze River Delta and Pearl River Delta. Such like Shanghai, Ningbo, Guangdong, Shenzhen, Taizhou, Jiangsu, etc. Represented by Ningbo and Taizhou, recently, mould industry is developing 15% to 20% per year. Totally, there are around 5,000 professional plastic mold making company in Zhejiang, among them, over 50% plastic molds makers are from Huangyan mould city in Taizhou.

 

Taizhou mainly plastic mold industry is focus on Huangyan city. However, when talked about plastic mold, Huangyan mould city is always been mentioned. Huangyan is a famous mold city with long molding history. Huangyan mould market is already has more than 20 years history.

SINO MOULD is the most famous and most experienced plastic mold maker in Huangyan mould city. SINO MOULD has a complete line of molding equipment in its factory , such like large quantity CNC milling machine , 5 axis high speed CNC milling machine from Italy , EDM machines from Japan , turn-lathe machine , grinding machine , deep hole drilling machine , 3 coordinates measuring machine , SINO also has its own inspection center. The entire needed plastic mold production machine are all in readiness in our factory, it extremely decrease the plastic mold production cycle time and the mould cost. That makes SINO MOULD has strong competitive ability in the mould market in China, also in the world mould market.

How to select a good plastic mold maker?

How to select a good plastic mold maker is a question confused most of the mould purchaser. Because there are so many plastic mold maker in China, and their scale, mould quality and price are various.

Personally, I regard a responsible plastic mold maker as a good plastic mold maker. Take SINO MOULD as a sample. SINO is regarding “Responsibility” as their core philosophy. Responsibility is one’s recognition, sensibility and belief. If a mould maker can have all this spirit, then they can do the job better than any other ordinary company.

A good plastic mold maker should have excellent engineer term. Mould design is the soul of a mould. Many plastic mold maker can’t making the mould very well is mostly because the un-reasonable mould design, and their engineers can’t shooting the trouble. Only excellent mould designer can design correct drawing, can find good solution for a difficult structure product. They will always considering more about not influence the product function. 

Company’s administrate is an important factor to the mould production. If a company do not have an impeccable administrate regulation, then do not place your orders there. Your mould production arrangement will be kind of mass. You are not going to get your mould in time.

Good plastic mold maker should have complete production equipment. If most of the mould production progresses need to be done by outside workshop, the delivery time will be longer.

However, SINO MOULD is a plastic mold maker who has high theory, perfect administrate regulation, strong design team with over 30% engineers, more than 150 sets production machine in its own factory that do not need any machining outside the factory. The delivery time and price is very competitive from SINO. SINO MOULD is already becomes a world leader plastic mold maker.

Advanced plastic Injection Moulding System

Plastic injection moulds develop day after day. Each time, on exhibition, we can see that all manufacturers will exhibitor their newest and most advanced mould technology to attract customers. K fair in German is one of the most famous plastic industry exhibitions, there are many famous plastic injection moulds manufacturer will attend the fair and display their newest and most advanced plastic injection moulds. Besides K fair, NPE in America, Italy Milano PLAST, Plastic Magen in Mexico, brazilplast, Canton fair and Chinaplast, they are all world famous plastic injection moulds industry exhibition where can learn a lot of advanced plastic injection moulds technology.

In recent years, gas assistant molding system and RHCM (Rapid Heat Cycle Molding) are top two advanced plastic injection moulds technology.

Gas assistant molding system

Gas assistant molding is a kind of new technology which brings the high pressure air into plastic molding parts to let the plastic product with hollow section. Compare to traditional plastic injection moulds molding, it can reduce the weight of the product; realize thick wall and thin wall at the same time. The product surface will be more beautiful than traditional mould, without shrink mark, deformation and other molding defects. This kind of molding technology is more and more widely used in commodity products plastic injection moulds, household appliances product plastic injection moulds.

Sino Mould after some years’ research and development, it succeeds on gas assistance molding technology on various kinds product, such as for plastic chair, plastic handle and so on. Below is the picture of our design of gas assistant chair for your reference.

Besides, injection machine and plastic injection mould, gas assistance equipments including Nitrogen Generator, pressure controller unit and air inlet parts.

RHCM (Rapid Heat Cycle Molding)

It is a kind of high speed and high temperature molding technology. Put some Glass Fiber into plastic raw material to get the plastic product with high hardness and reflective surface. RHCM can remove the molding defects like melt line and flow mark which will appear in traditional plastic molding.

RHCM use high steam to make the mould cavity surface to reach the plastic raw material distortion temperature. Mould with high temperature ensures the good flow of plastic raw material; it makes the material fast flow and filled. It can avoid material become solider. This kind technology realizes no cooling molding and product with high glossy appearance without molding defects like deformation, melt line, flow mark, sliver line. This kind of mould with short cycle time, reduce around 70% compare to traditional molding.

RHCM mould have its advantage, it also have some disadvantages

·         Mould steel will be easy crack - As there are a rapid transfer from high temperature to low temperature, so RHCM mould have high demands on mould steel, it must have good resistance to cold and hot fatigue. Once the steel is not good, it will be appearing very series problem, mould steel will be crack and it appears frequency.

·         Oil stain - As the mould temperature will be exceeding 130 ℃, it will lead to liquid oil leakage; it will make a mark on product. This problem only can be solved by using slide lubrication.

·         Gate area will appear white mark - As RHCM molding material also with GF, GF has high hardness, it impacts gate area time by time, so after some time using, the mould will have the mark that lead to product become white on this area.

Even though, RHCM technology is not wisely used on market, but it will be a main technology in future as more and more customer require for high quality product, especially for outer parts. Nowadays, RHCM mould is mainly used in outer part product, like TV case and some automotive parts.

The main factors need to be considered in making of good quality PET mould

PET mould has a long history on the world; there are several famous companies which have rich experience of PET preform mould and lead the PET preform mould industry, like Husky from Canada, Hasco from German…PET preform mould has become with more and more cavities to reach high production efficiency. Even Chinese preform mould start later than European countries, it has a rapid development in last few decades.

 

To achieve high quality PET moulds, Chinese PET preform mould makers do a lot of research and development. To make good quality PET preform mould, mould life, mould cycle time, mould injection stability are the main factors need to be considered.

How to make PET mould with long mould life?

First, Mould steel is one of the main factors of mould life. Preform mould steel must be durable with high hardness around HRC 48-52 to ensure the mould won’t be wear too much during production. And the mould steel must stainless and with good polish ability to ensure high transparent of PET preform. Generally, good Chinese mould maker will use Sweden Assab mould steel S136 to make mould core and cavity inserts. As for the mould base, it is important as well to ensure long mould life. LKM mould base is one of the famous standard mould bases, mould maker can use LKM mould base, some mould maker make the mould base them, to ensure the quality, and the mould base steel should no bad than P20.

Second, good mould design is another important factor to ensure long mould life.

Mould structure should be as simple as possible to make the mould easy running and easy to do maintenance. Good mould structure should with less part which will be damaged easily. As to PET mould, good cooling system is one of the most important factors to ensure long mould life and reach high quantity output. The water channel should with bigger diameter to let more water in and the water should go to cooling as much as surface near to the molding surface.

Third, hot runner system is a very important part to multi cavities PET mould molding.

Hot runner system is the main part which ensures the mold injection balance and stable. PET preform mould generally adapt valve gate, there are many heating parts is easily broken, many customers will buy many heating parts as spare parts. There are several world famous hot runner brands, like Husco hot runner, Husky hot runner, Synventive Hot runner, Yudo hot runner… of course, there are many Chinese hot runner brand developed, for example, Anole Hot runner, it is a branch company of Sino Holdings Group, Sino Package mould make preform mould with Anole Hot runner, it success to make the preform mould with 72 cavities. Now we have design preform mould with 96 cav and 128 cav, in near future, I think it will be successful to make into production.

After finish PET mould R&D, how to realize the mould, mould tooling is the important stage. Before, Chinese PET preform mould maker have good design, but their tooling facility cannot ensure the mould quality, so even they have good design, they cannot reach a high quality mould. Now in China, there is more and more advance and precision tooling equipments, many factories are able to buy world famous tooling equipments and the tooling tolerance can be controlled within 0.01 to 0.05mm, so Chinese PET moulds are improved day by day.

Besides the hardware, Chinese PET mould maker with more and more advance mentality, the scale of the factory is bigger and bigger, it can offer very well after sale service in time. Good after sale service help Chinese PET mould maker walk into world class. In near future, I believe Chinese PET preform mould will be the top of world PET preform mould.

Things to consider when choosing a good mold factory

China plastic molds market becoming popular in global molding field. More and more mold buyers over the world come to china looking for suitable plastic mold maker. Also more and more investors from different countries choose china to set new molding factory.  

There are many plastic molds factories in china, and most of them are concentrated in three area: Guangdong province, Zhejiang province Ningbo and Huangyan Taizhou. As recent year’s china mold factory and china mold plant rapidly increasing, then how to choose the suitable mold factory? How to find the mold factory that offers you required plastic molds china?

Each mold factory can say: We’re the best mold maker in China. We provide good quality plastic molds china. Is it true? Nobody knows, especially new plastic molds buyers or new flesh in plastic molding field.

A good mold factory, direct viewing, you should check how their tooling equipments. When you first time visit a mold factory, they are very new to you, and you have no idea about them. But you can see how their equipments. This is the most basic factor. Precision tooling equipments ensure high precision mould dimension, thus ensure you good quality plastic molds that you need. Such as Japan Sodick precision EDM, tooling tolerance can be 0.01mm; Sodick precision wire cutting machine can make it 0.005mm. Besides, Italy Fidia three axes high speed CNC, Switzerland Agie Charmilles wire cutting machine and EDM machine rank top.

Second, you may ask them how their technology is. Updated technology is the most important thing for a mold factory survives in today’s plastic molding field. New technology can attract more customers, if it also helps convenient in molding; I think nobody can refuse it. For example, vegetable plastic crate Turnkey molding is popular. To molds manufacturers, injecting cycle time and gram weight of plastic part are the most concerned item, because it directly infects investor’s return on investment. Sino Mould finds a solution to solve highly required output of vegetable crate part, and becomes the pioneer of four cavity crate mold manufacturer in China. With special mold system, cycle time of this four cavities crate mould can realize 23 seconds, making a great breakthrough in long time one cavity plastic crate molding. Also it wins SINO top ranks plastic molds china. 

To choose good plastic molds china, third, you may check their molding experience. Experience is another important item to a mold factory. Without any experience, molds buyers feel worried about the quality. Even in the manufacturing process, it will be somehow difficult for both sides understanding. You may check their product samples room, or if you’re an expert in plastic molding field, you may ask some related questions to check their abilities. 

The last, and also the most important item of choose good plastic molds china factory, is how they control delivery time of projects. Time is money, especially to molds buyers. As buyers need time to manufacture plastic parts before they have demands in market, otherwise you will miss the best time of selling. Buyers also will lose a lot. That is to say, if the mold factory takes too much time in mold manufacturing, it causes delay of the mold, thus mold buyer is not able to have it. Without the mold, buyers can not start manufacturing, and more delivery time delay, more economic benefit loses. Above all, time control of mold delivery plays an important role. Also it can be an important item to choose good quality plastic molds china factory.