Klarm Mould Blog

How to calculate injection molding cost

07/02/2018Klarm Mould

The question is a straightforward one, but there are various things to consider while calculating the cost. Factors like the durability of the mold, shipping cost, material selection, maintenance costs, etc. affects the final cost. The cost differs for every purchaser in different situations. You can go from the lowest to the highest depends on your choice and budget.

The durability of the mold – The injection mold you are choosing for should last for the entire program; if it loses its shape or characteristics then buying it will be just a waste of money. Also making a purchase from a trusted source is better to avoid future complications if the product turns out defective.

Shipping cost – It is a matter of concern for those who are buying mold on a foreign land. Getting it shipped to your workplace could be costly. It can cost a good share of the final price you pay for the product.

Maintenance cost – If you are making purchase offshore then its maintenance is your responsibility and getting it home with safety and looking after requires more money. If something misshapen during shipping then it may affect the product’s productivity. In such conditions, you will be obliged to make another purchase. And precaution is better than cure. It is better to invest a little more in its safety than buying altogether a new one.

Material selection – It is an important factor to keep in mind while selecting. Your payment rate depends upon the type of material you choose. The material should be strong enough to endure all the mechanical pressure it is about to go through.

Roughly the cost of the injection molding is the price finalized on the RFO but apart from this the cost of the mold also includes many factors that cannot be measured. That is the experience of the builder and what technique he is using. If the builder is good at his job and is experienced then work becomes easier and the cost of repeating the cycle again reduces bringing monetary savings. These things are not written on papers, but if you give it a thought then can cost you a good whooping amount. Plus there is always little wiggle room in the final cost of any product. It is better to keep a little sum aside for safety purposes. It will keep you ready in hard situations.

In case if you have already a fixed amount in your mind and don’t want to spend any extra buck then you should tell so to your mold builder. That way the mold will be designed with your instructions and budget in mind. If the number of cavities is higher in every per cycle then the parts will be less expensive allowing higher input. You can also opt for the basic products supplied by you rather than paying for it as part of the final product. Through these small hacks, you could save much money.

Need more insights on injection mold selection and costing then visit https://www.injectionmouldchina.com. They will not only provide you proper guidance but are also makers of best injecting mould in China. Here you will get all the details on China injection molding cost.

Difficulties of making injection molds of transparent plastic products

05/04/2018Klarm Mould

Making injection mold is a difficult process. Even small mistakes can cost you almost a fortune. Such work should be done with immense attention and prior experience. While making, injection molds one faces many problems like the machine, the mold, but most of the trouble arises due to the plastic. Many people today are opting for plastic and its demand is increasing, but we cannot overlook the difficulties of transparent plastic products in making injection molds. Use of plastic in making injection modules is difficult. There are several reasons behind this. First, the process through which the plastic goes through is a tough one. It passes to the heating cylinder from the hopper on the way into the cavity. After facing such dreadful situations, its shape and size are ought to change. Other reasons are that the valve spring may leak or the heater band might be burned.

The kind of plastic you choose for your mold could also create problems. If you choose wrong plastic it can affect your material adversely. In case you think that all plastics are the same, then you are wrong. They are not. It is important to learn first about your material, your work design about it, its peculiarities. Making all these decisions earlier can be of great help and will also save you the trouble of making changes later.

ABS – The ABS plastic which is generally used has the tendency to get scratch or scars that are clearly visible. During the cooling process, it also has problems sinking. And if you use an opaque plastic, then good luck with it.

Glass-filled nylon – Good thing about the glass – filled nylon is that it can resist many harsh solvents that that could damage other plastics like ABS and polycarbonate but its main con that causes problem is that Glass-filled nylon is extremely vulnerable to sinking. The material design is of no help.

Polycarbonate – Polycarbonate’s price is higher than that of ABS. It also has the tendency to sink. And if there is some kind of defect in your material then it can affect the plastic’s performance.

If you want more strength from the plastic, then you can combine the ABS & Polycarbonate for better results.

Next problem you face from the plastic is due to its color. The majority of the colors in which plastic is available only vary between dark brown or black. You don’t have many options to choose from. After its finishing, the outlook and appearance of the product depend on its final color. If you want, then you can have it spray painted, but that will increase your production cost.

Although the final cost of your product depends on all the investment the choice of plastic plays a major part. In general cases the price is low, but in extreme cases, it can revolve around the figure of $10000 to $12000.

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What Is A Quality Injection Mould Maker

03/28/201810/11/2018Klarm Mould

An injection mould maker is a machine for producing parts by injecting at high pressure, usually plastic material into a mould. The plastic used are thermoplastic and thermosetting polymers. Material for moulding is conveyed into a heated barrel where it is mixed and then injected into a mould cavity where it hardens by cooling into the shape of the mould. Mould may be made of steel, aluminium and are themselves made with extreme precision so that the desired parts are created to match the design. Vice versa, those parts are also designed so that they are well suited for injection moulding. The adaptability of injection moulding lies in this breadth of design consideration and possibilities, of both the injection mould maker in China and the item to be moulded.

Injection moulding finds application in almost all manufactured items, from plastic bottles to car parts.

A quality injection mould maker (person) should support his customer right from the concept stage to the mass production stage. He should know what questions to ask and anticipate where he is going to face difficulties in the moulding process while the part is being designed
A quality injection mould maker should be complete and integrated and yet have a variety of systems for different applications.
It would by virtue of being a quality item, be assisted by robotic systems.
They should be environmentally friendly, and have energy and space saving features.
The manufacturers should offer technical support and systems for factory automation.
Water circuits in a mould maker should not be looped as this leads to warpage.
The quality injection mould maker (person) should be present at the design stage of the part to anticipate difficulties in mould making and design.
Use of 3D rapid prototyping from 3D computer models is useful in injection moulding eg. To design water cooling channels along the contour of the mould which improves the quality of the parts and improves cycle times.
An internal storage memory for 50 molds is available
Fault diagnosis with alarm messages is possible
The command control centre should be shielded against magnetic interference.
A weekly schedule should be incorporated.
A quality injection mould maker that is driven by an electric motor has the following advantages over a hydraulic moulding machine

A significant energy reduction of 40% to 50% is possible by electric compared to a hydraulic injection mould
Stabilization of the molding process is achieved by use of the servo motor in the injection process
Noise generation level is much lower.
Molding cycle can be shortened by using different motors for different stages of the moulding cycle and running them in parallel, like opening, closing, injection, ejection, and weighing
Injection speed can be increased
Since no oil is used, it is an environmentally cleaner process.
A digital display is always welcome

They should be low maintenance
A two year warranty which covers the replacement and or repair of any part that has a manufacturing defect.

Injection mold makers in China are supplying plastic injection moulding machines all over the world, at very competitive rates. They are also setting up offices all over the world to serve their customers better.

Resource box: This article is originally posted from https://www.injectionmouldchina.com.