ecomolding

Ecomolding, the world cost-effective plastic injection mold manufacturer, special in the plastic injection mold, custom mold making etc.

China Auto Mold Company Have To Enter The High-end Market

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Stronger china auto mold industrial provide support to the development of own brand cars, Therefore, we must continue to challenge the first high-tech mold in high-end products. Currently, the domestic high-end products which meet the rate of mold demand is less than 60%, a considerable part of the dependence on imports. With the rapid development of China’s own-brand cars, future demand for our high-grade mold market will be more urgent. A few years ago, many china auto mold factory is mainly responsible for the A-Class and a small amount of mold development B-Class mold development, along with more B-Class, C-Class models to market, high-end market of automotivemold,The demand will grow substantially.

In addition, the multinational group purchase more and more mold from China, the next 5-10 years the mold demand of European and American auto market will be a substantial mold growth, and gradually the Chinese and the low-end to high-end development, which objectively stimulated development of Chinese high-grade mold market. China mold industry must bear the burden of molds and welding fixtures,China’s auto development process required beneficiary of China’s mold industry is not only the progress of the industry itself, but the main thing is for own brand car industrial. Due to the progress of China’s mold industry, the mold price for international import fell by 30% compared to 2000, and even more, it is an advantage to the people of China by china mold industrail develop

When Chinese industrial grow up from “Made in China” to “Created in China”, there will be more Chinese brand cars in globle market. Auto mold industrial will be powerhouse to china auto industrial.

Injection molding defects the cause and solution

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1, filling defect

 

It always show uncomplete filling or edge collapse,it will dective product,waste material,labor and time.ther are many possible reason, such as nozzle temperature is too low,not enough supply,flowablity not good,injection pressure is low,the gate is too small or not right position,the mold surface is not smooth enough,nozzle is blocked,venting problem

 

2,flash or burr

 

It always happen in parting line,it will increase the difficulty of machining or dishape,even defective.the possible reason such as:nozzle temperature too high,injection too much material,flowbility is very good,injection pressure too high,clamping force too small

 

3,sink mark

 

It always caused by material shrink after injection molding,possible reason such as:nozzle temperature too high,resin supply not enough,shrinkage is too big,injection molding pressure too low,holding time too short,injection speed too slow,mold teperature too high,cooling time too short,the thickness of product is uneven,gate too small

 

4,welding line

 

It always happen in product which have holes or other shape,possible reason such as:nozzle temperature too low,material is not dry up enough,injection speed is too slow,gate too small,venting is not good,injection pressure too lowor other reason

 

As we can see the types and causes of injection molding defects, almost every kind of defect is formed by the combined effects of many factors. All these reasons are performance and molding machines, molding material character, mold design structure and material, filling control systems and different operating processes related. office for rent . Although injection molding technology development in some areas is very quickly, technology is relatively mature, but accompanied with increasing difficulty defect control, which requires us to to reduce and eliminate injection molding defects with the help of advanced theory and advanced technology tools.

Plastic injection Mold Check Procedure

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Plastic injection mold check

  • Mold surface is free of pits, rust, extra unused rings, water fitting, gas, other defect which affect the appearance of the hole, etc.,
  • More than 1.5mm chamfer on all mold plates.
  • The cooling fitting should be upper than the mold surface,and is better to locate in unoperate side
  • Every lift ring should be marked their size if their weigh over 10 kg,or make sure the friendly use.
  • Make sure supporter is higher than blocks by 0.05-0.15mm.
  • All cooling should be marked “IN” and “OUT”,adding sequence number if needed, such as IN1, OUT1, IN2, OUT2.
  • Each plates should be marked with datum symbols and numbers ,position at 10mm away from the edge, writing should be clear, beautiful, neat, spacing evenly.
  • Small molds must have lifting holes in A plate and B plate, all plates of large mold must have lifting holes.
  • All four corners of the mold should have pry slot between two plates.

Find A Proper Injection Mold Factory

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If you want to make plastic parts or develop some product and looking for some mold factory,there are six principles as below
Principle I: reliable team and good attitude
the injection mold factory should have rich experience engineer and team work., the team is equipped to fly. When you find injection mold factory, you can not allow manufacturers to ignore you, probably because too many orders start at the same time, probably because they didn’t pay attention to detail and so on, so to make a phone call in two days or three days a week, take a look. To maintain a relationship with them.
Principle II: The ability of descripe a good prospect
Tell him your project have a good future, rather than ask him to help you do that. Let him know that you give the best products to him, but also it is his chance. In fact, in the final analysis, it is to your supplier but also as one of your investors, so that they have an idea with you success. Share with your mold factory your understanding of the industry, From the boss to tool makers, should be enough respected.
Principle III: ID-MD, mold making and injection molding in one stop

Industrial design and structural design are done in one factory , although there may be some small problems, but the advantages in one factory should be bigger. Mold making and injection molding should be done the same

 

Principle IV: Not the best,but the proper
Not the biggest and best mold factory is suitable for you, nor is it a small mold factory is simply not considered. Select mold factory, depending on your project, precision,development cycle and costs. Precision and cycle always conflict with the cost. Here you have a balance. Also not a small mold factory, we can help you save money. Small mold factory will often respond quickly. But where there will be a lot of such irregularities proplem.
Principle V: The standard is the key
To avoid unnecessary fighting and possible miscommunications. You should record every design change,all drawing,spec and reports should be written in paper and signed

 

Principle VI: patent application or NDA
Normally you should sign a NDA or Patent application before you make molds,it will protect your product not to be coppied.

China Plastic Injection Molding Company Will Meet More Opportunities In Next Years

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According to the national policy of China’s automobile industry, in the coming years, the application of lightweight materials are fulfilled in automotive products to decrease fuel consumption.

In the process of automotive weight reduction, the plastic injection molded parts are widely considered as one of the best alternative materials. At present, more than 90 percent of automotive plastic products are produced by plastic injection molding. The rapid development of the automotive industry provides a huge market space for the relevant plastic products and plastic injection mold companies.

According to statistics, the average amount of plastic per vehicle achieve developed 150 kg, the average amount of plastic parts per car is only 100 kg in China Market, compared with developed countries, there is much room for growth. China’s automobile industry is expected to increase the ratio of the amount of plastic product in the coming years, thus increasing the demand for high-precision, high stability of plastic products. Meanwhile, the low-pressure injection mold and other high-end rapid prototyping plastic will also usher in good development opportunities

Also the plastic injection molded parts will be much cheaper than stamping or die casted parts, the more plastic parts used in Car, the cheaper price will be ,then it will stimulate the car market, let more and more medium income people can afford the car.at the meantime, China plastic mold company also get more order from market increase.

The Decription of China Mold Development

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1, uneven development, overall level is not very high

Although many mold companies have reached the international advanced level, but on the whole china mold field, the precision of mold, cavity surface roughness, the production cycle, life and other index with foreign advanced level ,there is a big gap compared.

2, In most china mold company, the ability of develop is weak, innovation capacity is obviously is not good

On the one hand is the low proportion of skilled tool maker, and their level is not high enough, on the other hand is less investment in research and development; more important is the idea behind, not enough emphasis on innovation and development.the mold company not only attach importance to the development of mould ,but need to pay attention to the innovation of the products.

3, difficult to meet supply and demand
In recent years, the china mold market has been less than 74% satisfaction rate, including large-scale, less sophisticated, long-life molds to meet the rate, estimated less than 60%. Meanwhile, the mold industry in developed countries is accelerating shift to China, more and more international procurement, international market prospects. Market demand, the development of production were unable to keep up, this supply situation will continue for some time.
before Solve

4, the shortage of trained engineer and skilled toolmaker will take time to overcome
5, laggad technology and equipment, poor organization and coordination
Although some china mold company grow up through technological innovation in recent years, more advanced equipment have been equipped,some foreign-funded enterprises are also not lagging behind in foreign countries, but most companies are still backward technology and equipment. More importantly, corporate organization and coordination is poor, difficult to integrate or mobilize social resources for our own use, so it is difficult to undertake large projects.

How To Calculate The Price Of Injection Mold

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The process of injection mold price estimation:

  1. First, we should choose the steel and manufacture process base on customer requirement.
  2. Afer choose the material, we should make a simple draft, then we will get the mold size and weight.
  3. Manufacture cost, the manufacturing cost is 1.5-3 times of material cost base on complexity.
  4. Every mold should consider risk cost, it normally is 10% of mold price
  5. Tax, it depends on local policy.
  6. Design fee, normally it is 10% of total mold cost
  7. Trial fee, it is 3-5% of total mold price

injection molding parts cost analytics

The way of injection mold price calculation

  1. Mold price=steel cost+design fee+manufacture cost+profit+tax+trial cost+package and transport fee
  2. The proportion
  • Material cost: steel and standard spare part take 15%-30% mold price
  • Manufacture and profit: normally 30-50% of mold cost
  • Design fee:10-15% of mold cost
  • Trial fee: within 3% for big size mold,5% for small mold
  • Package and transport: real cost or 3% mold price
  • VAT: 5%-17% of mold price

Still didn’t know how to calculate the plastic injection mold part price? Don’t worry, ecomolding have the pricing tags for each mold parts, you can check out here and see the general price.

The Document And Preparation Before Mold Shippment

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As we know,we as plastic injection mold manufacturer should make sure the mold meet customer’s requirement and the quality meet highest level,so the checking procedure should be followed as below.make sure all document needed are all packed in shipping box before mold shippment

mold shipping box

1, 2D mold assembly drawing with hard copy

2, 2D part drawing with hard copy

3, all the 2D drawing and 3D part drawing with PC copy(Buring in CD disk)

4, Hot runner drawig if have

5, short shot photos and 2 cycle auto injection vedio burn in the CD

6, all the electrodes for mold in case modification in customer side

7, 1 shorts sample for the last trial

8, 1 copy of injection molding parameter

9, steel certificate for core and cavity

10, the dimension measurement report for last samples

11, The hardness treatment certificate for cor and cavity steel

12, one copy nitriding certificate

13, measurement report for mold steels.

Two Color Plastic Injection Mold

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Most designers focus on one color plastic injection mold, so they don’t to how to design when we met two color plastic injection mold.so we will talk about the theory and important point about two color injection mold.two color mold have another name “two-shot mold”, they inject two resin on the same machine but injection two times,  typically consist of 2 sets of mold, the core side will rotate 180 degrees, but cavity side will be fixed.but the molding part is only ejected out one time.we always call it two-color injection molding and need special two-color injection machine.

 

The characteristics of two color mold:

  1. Two shape of the cavity is different, forming 1 kinds of products each. But core side has the same shape. (Note: if there are not the same, use sliders)
  2. After the cavity rotates 180 degrees, the cavity must fit another core, Designer should pay attention to this point.
  3. Please carefully check the data of color injection molding machine such as maximum mold thickness, the minimum allowable mold thickness, K.O. holes distance etc..
  4. The gate should be cut automatically in 3 plates two color mold, especially soft resin.
  5. When we design the second injection cavity, we should leave some space to avoid scratch, but must think about the seal area, the molding part have the possibility of deformation and cause flash
  6. We can make the first molding part a little bit bigger than spec.it will be pressed tighter when the second injection, reduce the risk of flash.
  7. Pay attention to in second injection molding if they will make the first molding part deformed by resin flow, If that is possible, we must think of a way to improve them.
  8. We should make the cooling system plenty, balance and same in two mold
  9. 99% we injection hard material first, before soft is easy to deform
  10. In order to make the two plastic stick more tightly, we should consider “sticky” of two resin and the roughness of mold surface