Search This Blog

Monday, 26 November 2012

Characteristics and advantages of Hot Runner as compared to Cold Runner

Hot Runner System
Hot runner system is the great widely used plastic forming system. Mainly depend on the heating device and the electric temperature control. Makes the melt plastic would not be curdle, Let the plastic filling into the mould cavity. Under the without injection pressure circumstance, the melt plastic would not flowing automatic, and also would not appear drawing and over flow during the plastic product ejection. So the hot runner mould also called no runner or little runner mould.

1.  Hot runner and cold runner compared advantage 

A.  Cold Runner:

  • During the injection filling process, as the front of the melt plastic energy lost, the surface of the melt plastic would be curdle. And also would make the injection pressure loss bigger; affect the injection machine using life directly.
  • During the injection filling process, as the front of the melt plastic energy lost, the surface of the melt plastic would be curdle. Make the plastic temperature not uniform which filling into the mould cavity. This may lead to the plastic appear   splay mark, weld line, warped, sink marks, short of filling and a serious problem,  after forming to plastic product. Makes the plastic product can not reach the requirement.
  • Because of the cold runner existing, urge some factory set special waste secondary processing equipment. Cause the waste of the human resource and the material resource.
  • Some mould structure gate can not separate automatically with the plastic product. Request to add the processing of clip vestige. Low automation degree.
  • Long time mould cooling, long time filling, make the low production efficiency.

B.  Hot Runner:

  • After heating, the hot runner temperature, injection machine charging barrel temperature and injection nozzle temperature are almost equal. Avoid the plastic curdle phenomenon appear in the runner. And the injection pressure waste will be smaller. 
  • After forming, high quality appearance. Because when the plastic inject to the cavity, the temperature, pressure and the density is uniform. After forming, the plastic inside pressure is small. Little shape change and stable dimension.
  • Without waste material, save the material, save the resource and cost.
  • Mould quick cooling, quick filling, short molding cycle and high production efficiency.

2.  Hot runner mould characteristic:

  • The temperature range of the melt plastic is widely. when in low temperature, the liquidity is very good. At high temperature provide with the heat stability.
  • Sensitive to the pressure. No pressure without flow, but if forcing flowing instantly.
  • Good thermal conductively. Heating quick and cooling fast.

3.  Hot Runner Mould disadvantage:

  • Since the hot runner system contain the heating system and the manifold system, request to occupy large space. So the total height of mould must to enlarge, add the mould cost directly.
  • Heat losing seriously, hard to control.
  • After heating will lead to serious thermal expansion.
  • Hot runner system price is expensive, increase whole mould price.

4.  Some questions need to awareness when design the hot runner

  • Because after heating will lead to thermal expansion, between hot runner system and the mould, we suggest leave enough space for thermal expansion.
  • Hot runner and mould should avoid large area to connect.
  • Because serious heat losing, so please add an insulation base plate between mould and injection machine, to reduce the heat lose. Insulation base plate must be insulation material. Commonly like the Bakelite plate, all kinds of plastic plate or fiberglass and etc.

Thursday, 22 November 2012

Anole hot runner system supplier uses high quality steel material and the best heating elements

With the development of plastic injection domain, hot runner system has emerged to replace cold runner system. Except some raw materials, which are not suitable for hot runner, such as PVC, nylon plastic, etc. what’s the reason of increasing numbers of plastic injection products companies are big on hot runner product? Here I list some root causes according to above question.

First, in virtue of hot runner system feature, there is no cold plastic material in the runner and mould, which would dispense with recycling cold waste material. Especially for expensive plastic materials and cannot reclaim the waste materials, hot runner system can help you saving raw material cost greatly. According to some statistics, hot runner will recover hot runner charge within 2 to 3 months when during a normal production. 

Second, hot runner can improve products quality. Because the melted plastic material temperature will not lower easily that compare with three plates mould. Nevertheless, cold runner mould should make up melted plastic temperature by increasing the injection temperature. As a result, hot runner technology makes melted plastic material flowing easier. Large, thin wall, difficult to treating plastic products are particularly suitable for putting in use hot runner product. 

Third, hot runner system made by good hot runner supplier can achieve automated production and enhance the rate of production. Due to injection mold with hot runner does not need to take the waste plastic material out after injection molding processing. It is conducive to spurge and production separate automatically, in order to reduce injection cycle time. 

Forth, strengthen injection machine function. The melted plastic material in hot runner system has contributed to the impression of pressure. It reduces pressure losing and injection pressure, clamping power further. In addition, it cut down injection pressure holding time. In addition, it can form big plastic products in small injection machine when using hot runner not cold runner. 

Fifth, hot runner will advance consistency and balance of plastic products.

If, however, you want your injection mold achieve above standards. You should choose a good hot runner supplier to design and process your hot runner system. A good hot runner supplier will offer you a perfect solution by Mold flow. What’s more, they have a strong design and processing team, which has rich experience in injection molding line. Anole hot runner supplier research and development in hot runner market for more than 10 years. Every yeah, we put up big money in new products development. Up to now, we become stronger and stronger. Hot half system, multi-tip for one nozzle, small hot nozzle, long hot nozzle, etc. in the meanwhile, we are the agent of German heating elements (GC & HOTSET) in China, which praised as the most durable and most stable heating system in Germany. 

Anole hot runner system supplier selects and uses high quality steel material and the best heating elements to assure our quality. We have many leading manufacturing equipments, such as 5 axis milling machine, high speed milling machine, precision EDM machine and wire cutting machine. 

Welcome to come and visit our company. You are going to obtain the best service and perfect solution from Anole hot runner supplier.

Tuesday, 20 November 2012

Anole Hot Runner System for Injection Moulds

Mould heaters are basically used in hot runner system(anole) for injection moulds, the purpose is heating the whole hot runner system up to keep the plastic material under melting state so there won't any cold sub-runners or any vestige left on the molded part surface. Anole is one of the best mould heaters makers in China, can provide you mould heaters with best cost performance. Mould heaters-hot nozzle ( heater or hot sprue bush heaters.

These series of mould heaters are used for the hot nozzles. Usually it has round or square at the cutting surface. Anole provides the square type nozzle injection molding heaters at 4.2*2.2mm but also can be customized according to the customers' requirements.

Hot nozzle mould heaters applications:

·         Hot runner system nozzle and bushings
·         Hot runner injection moulds
·         PET preform and thin wall container moulds
·         Hot runner crate moulds
·         Valve gate hot runner system
·         Pump mould injection molding

Hot runner nozzle mould heaters can be used either with or without thermocouples. If it is used with thermocouples, then it can be well installed and well connected with the nozzle body, but the disadvantage is: it can be interred with each other .If it is used without thermocouple. Then the hot runner system supplier has to install the heater and the thermocouple very well.

Anole hot runner system can offer flexible mould heaters with a layer of Ni outside of the heater which can cover the heat more than 80% back to the manifold. This series of fixable heaters has a lot of good advantages: easily installation fast heating full used headlong heating life easily replacement.etc. Anole supplies standard with 6mm×6mm and also can be customized.

If you have any requirements on Anole mould heaters or injection molding heaters, please contact us. Anole team will do the very best to satisfy you.

Thursday, 15 November 2012

Hot Runner Supplier for the Manufacturers of Molds for Medical Field

The hot runner supplier can be unique for these machines as there are very few numbers of such suppliers that are there to take up the supplying part for the manufacturers of the injection molds and different other instruments that are used in the medical field. There are some local companies that manufacturers these injection mold but they are not up to the standard as the plastics should be of a high quality and to melt them and get them in a molten state you would need special apparatus that are helpful and easy.

The hot runner system can be seen as the most efficient service provider of the manufacturing the molds that are going to give a better business for the manufacturing unit that are there to bring up the market by supplying the proper specification of the mold that are to be supplied to the market. The market are to be judged to find out the requirement and then if the demand of such plastic mold making devices and the molds are high then any design will be good for them.  The demand being low, the manufacturers will specify the designs so that they can achieve more customers depending on the design of the molds or the machines that will prepare the mold.

There are different types of requirement of the system and you need to find the way to bring out the perfection for providing the hot runner manifold system and several other systems that are to be supplied as per the requirement. The different styles are X-style and the H-style manifold system. You will find there is a requirement of the T-style, the I-style, the y and the K-style too. They have different specification and the devise and parts are to be prepared in the way the specification goes. These differences are going to be the result of the extensive research and development of the company that are going to serve you with the parts and the types of machine parts.

The heater coils are the different parts that are important for such measures and you can get the quality heaters that can be the ideal machine part that will help you with the heater performance. The hot runner heaters have a good demand for the molds and the other goods are going to need the heater for the general way to manufacturing the materials. The heaters are of different types and you can find the control of quality delivered by the manufacturer and they find the best for the different demand of the market and their own customers.

The designing plastic that are used as the injection molding design are going to be the main ingredient that is needed for hot runner injection mould and the hot runner manufacturing units are also going to find out how the molds are prepared from the units to be able to help in preparing the units for helping in the production of the molds. The molten plastic is poured into the molds and then is cooled inside the cavity that is shaped according to the thing that is going to be prepared. The injection mold part and the design are the one that they will assemble and manufacturing.

Click here to know more about hot runner system and hot runner injection molding.