Definition injection mold cooling and delay

Injection molding machine mold cooling time for the quality of the mold has a great influence mold needs to seriously consider this issue when the production, we use every day household items, plastic products and other products will need to be made before the mass shape molds, dies after good, appearance of products on the use of a mold to mass production, visible mold our lives have a huge impact, injection mold making mold cooling time is a major issue. It has a great impact on the mold, and therefore, it is necessary to study the factors.

Injection mold cooling refers to the cooling water in the injection mold cooling system circulates inside, take away the heat of the molten plastic to promote products in the injection mold internal cooling stereotypes. While cooling, and by turning the screw after the retreat, a new radio station molten material into the molten plastic tube and heated, ready for the next injection cycle.

Delay refers to the injection mold injection remains separate state, the product automatically fall off or are considered mechanical devices removed. An artificial control, i.e. manual or semi-automatic injection of injection; the other is automatic injection molding, and injection delay length has been set, the injection molding machine after a preset period of time automatically to the next work cycle.

Injection mold pressure principle to decide life

China injection mold pressure center refers to the role of various stamping force position, in order to ensure the normal operation of the press and mold should be made with the press ram pressure center coincides with the center of the die. Otherwise, it will die and press slide produce eccentric load, so between the slider and the rail excessive wear, mold-oriented parts accelerate wear and reduce the life of the mold and the press.

Mold pressure center, safety following principles to determine:

1. symmetric parts of a single blanking pieces blanking die pressure center piece geometric center.

2. The shape of the workpiece and the distribution of the same symmetry, the center of pressure of the die part with the center of symmetry coincides.

3. Each component of the torque of an axis of algebra, and so Yuzhu force force the shaft torque. Find the coordinates of the point of force position 0,0 (x = 0, y = 0), is the center of pressure of the mold are asking.

When should you consider to us hot runner system?

When:

1. The resin is sensitive to shear rate

2. The part is big or thin wall

3. The cold runner is too long

4. The part is heavy

Below is the advantage of hot runner china injection mold

1. No waist for sprue or runner, no need to grind and recycle them

The recycled material has gone through the “heat-history”, it raise the rate of material degrade, color change. Especially when the cold runner is heavier than the part. Also recycled material is easier to mix with other impurity.

2. Shorten the cycle time

The cold runner is usually thicker than the part wall and it’s closer to the injection machine nozzle so the temperature is higher, it comes to a result the runner takes more time to cold down then the part, also the opening of the runner plate is also increase the cycle time

3. Reduce the size deviation in multi-cavity mold

Multi-cavity mold will face the problem of “corner effect”, because the turning in the runner, there is a difference with the shear rate of the melt by the inner side and outer side, the cavity with same turning side are tend to be filled faster than other cavity. This will cause the difference in packing time thus cause the deviation of size

4. Reduce the rejection rate

The temperature in hot runner can be precisely controlled separately. The plastic melt goes into the cavity, the result is same quality parts.

5. Eliminate the post-process, facilitate for production automation

Hot runner eliminate the post-process such as gate trimming and runner recycling, also facilitate for automatic production

6. Widen the range of molding

Lots of molding technology is developed by the base of hot runner technology such as PET pre molding, two-color mold, multi-material injection, stack mold .etc

But hot runner also have it disadvantage:

1. If the mold is low-volume the cost may higher than cold runner mol

2. If the material stuck in the manifold and nozzle tip could degrade

3. Hard to change material color

Robot technology help injection molding enterprise dig out potential profit

In the modern manufacturing process, injection molding enterprise has been wildly used in automotive production line. The research and development of robot has become a burgeoning high technology. Thus Injection molding enterprise can better combine the mechanical and automation.

Facing with the raise of molding cost and the increasing demand from customer, in this a rat race, injection molding enterprise should find potential way have low cost by replace human labor by robot.

Industrial robot is high-tech automation manufacturing equipment which has been developed in recent decades. It can be programed to process different kind of mission, it combines the advantage of both human and common machine. The accurate processing ability and the adaptive capacity to different environment bring it a vast prospect in different area. As injection molding is a traditional industry, robot technology reduce the dependency to human labor, reduce the production cost, to realize the sustainable development. Robot industry drives the development of traditional industry, its competition is no less than other raising industry.

Improve enterprise management innovation consciousness of injection mold products

China injection mold products enterprise management innovation refers to the injection mold industry in the context of innovation and control new injection mold technology initiative to try new injection mold processing environment, and then push the new changes in the quality and quantity of injection mold on. Injection mold enterprise management innovation to do, should grasp the following aspects:

First, the active pursuit of sustainable growth of enterprises injection mold, injection mold in today's rapid pace of growth sustainability has become a more important issue than the management efficiency of the injection mold companies are facing. Injection mold manufacturing process is an artificial system that is able to transform its internal system, which is able to achieve sustainable business growth objective conditions.

Second, to enhance the operational capabilities of injection mold companies, and "agile management."

1. On the production side, there are in accordance with customer orders, any volume manufacturing of products and improve the ability of the service.

2. Marketing deleted, there is value to the customer-centric, rich customer value, production characteristics of personalized products and services portfolio.

3. In terms of organization, to integrate internal and external business processes associated with the production of resources, through interaction with suppliers and customers to create and leverage resources to play a competitive advantage.

4. In the management, command and control change emphasizes the conversion to lead, motivate, support and confidence up.

5. The mold changing modes of cooperation between enterprises, mold companies only provide a variety of products and services only, you must also know how to put their core competencies and technical expertise to properly combine various favorable competitive with other resources to make up for their lack of and limitations. Mold enterprise survival principle, the "exclusive" to be "cooperative" inclusive replaced. Therefore, companies need to change the mold and cooperation model for other companies or organizations.

Now injection mold competitive market at this time. Management innovation is an important means of production of injection mold products companies to modernize management. Mold enterprise management innovation, can help enterprises increase economic efficiency and promote the rapid development of china mold industry.

Injection mold material selection requirements

ABS \ PC \ AS \ PS etc. are china injection mold material selection objects, many users are very urgent injection mold reasonably want to know the selection criteria, the appropriate materials to create the ideal injection mold products.

Injection mold material selection criteria, as follows:

1. High corrosion resistance many resins and additives have a corrosive effect on the cavity surface, which makes the cavity surface corrosion of metal corrosion, peeling, surface conditions deteriorate, plastic parts quality deteriorates. Therefore, the best use of corrosion resistant steel, or cavity surface chrome, nickel cymbals.

2. When the gloss and precision injection mold plastic parts, good wear resistance and abrasion resistance of the surface of the mold cavity are directly related to the surface, especially in some plastics joined the fiberglass, mineral fillers and some paint, they Gao plastic melt together and flow velocity in the flow channel, the mold cavity, the cavity surface friction of the great, if the material does not wear, will soon wear, damage the quality of the plastic parts.

3. Good dimensional stability during the injection molding, injection mold cavity temperature should reach 300 ℃. For this reason, the best selection of properly tempered tool steel. Otherwise it will cause changes in the microstructure of the material, resulting in changes in the size of the plastic mold.

4. The ease of processing mold parts are mostly made of metal, and some very complex structure and shape, in order to shorten the production cycle, improve efficiency, ease of processing the material requirements of injection molds and precision drawing into the shape required.

5. Good polishing performance injection molded plastic parts are usually required to have good gloss and surface state, thus requiring cavity surface roughness is very small, so that the surface of the cavity surface must be processed, such as polishing, grinding. Therefore, the choice of steel should not contain coarse impurities and pores, etc.

6. Affected by heat treatment in order to extract a small Gao hardness and wear resistance, generally injection mold subjected to heat treatment, but this deal should make changes in small sizes. Thus, preferred to use a pre-hardened steel cutting.

Study predicts sharp increase in bioplastics production, leading by Asia

European Bioplastics’ annual market data predicts that, the bioplastic plastic mould production will greatly increase in four years, reach 6.7 million tons in 2018. The data was announced on the 9th European Bioplastics Conference in Brussels, the prediction is basing on the 2013 output 1.6million tons. The study was compiled in cooperation with scientific partners the Institute for Bioplastics and Biocomposites in Hannover, Germany and the Nova-Institute in Hürth.

Biobased, non-biodegradable plastics, such as biobased polyethylene and biobased PET, is appearing the biggest increase, and local produced renewable and compostable plastics are more likely to be benefit by the new European union   directive on the reduction of shopping bags.

European Bioplastics chairman François de Bie said: “Flexible and rigid package remains by far the leading application field for bioplastics.”

"Besides this, a decisive growth can be observed in textiles and automotive injection mold applications. From functional sports garments with enhanced breathability to fuel lines — bioplastics are constantly spreading into new markets.”

The study found that Asia will expand its role as major production hub. Most of the currently planned projects are being implemented in Thailand, India and China.

"We urge the EU legislators to consider and make efficient use of the immense environmental, economic growth and job creation potential of our industry. In this context, the Circular Economy Package should remain in the Commission’s 2015 Work Program and the Waste Target Review should proceed as planned,” de Bie added.

A successful project for industrial equipment handle grip over molding tool

This is 2 sets of over molding tool WIT MOLD built for industrial equipment mold  handle grip, the first shot hard material is PA-GF30 and second shot over molding material is blue TPE, part weight is totally 293g+52g, the mould size is 396*596*480mm & 346*496*420mm, the mold weight is 854kg & 600kg. The build time is 7 weeks and after the 3rd trial the customer approve the mold.

The mold applies Hasco standard. Injection scheme is cold runner sub-gate. Over molding the part with two separated mold, 1st mold create the handle body and secondly put the body into the 2nd mold to do the over molding

This is one of our successful projects we made recently, and visit blow link for more:http://www.witmold.com/references/Successful_projects/

Prodways release 9 new product on Euromold

On Nov 24th 2014, the 3D printing company Prodways—which a subsidiary of French engineering company GroupeGorgé, unreleased 9 brand-new 3D printer mould and material.

At first, Prodways release a new 3D printer brand—Promakers, there are two series in it, the L series using Liquid photosensitive resin and V series using composite material.

Prodways released nine new products in these two series to meet the diverse needs of the market, of which 8 are L Series 3D printer, 1 are V-Series models. These products are used Prodways proprietary MOVINGLight technology, which combines UVALED and mobile DLP makes printing speed boost (10 times faster than the market standard), and print out parts have unmatched resolution and accuracy.

On EuroMold, Prodways will release its latest material brand --PLASTCureMaterials. These materials are developed by Prodways with its partners. Now has 14 kinds of different china injection mold materials, a total of about 20 kinds of products, most of which is the first appearance.

WIT MOLD attent Euromold show in December

EuroMold 2014 successfully held from Nov.25-Nov.28 last month in Frankfurt,Germany. WIT MOLD attent Euromold show as the china injection mold visitor.

EuroMold is the world’s leading trade fair for tooling and mould construction, design and product development. Based on the process chain “from design to prototype to series”, it presents products and services, technologies and innovations, trends and tendencies for the markets of the future.

WIT MOLD learnt a lot by visiting this show, including some new technologies and collected some important information for our company’s future development.

After the show, we also visited some customers in Germany. Seeing some molds running in our customer’s facility. We have known more about customer’s needs and will keep continuous improvement and make the progess year by year.

The machinability and mold life of injection mold have great relationship with the steel

The machinability and plastic injection mold life of injection mold have great relationship with the steel, so the mold steel is very important, generally saying mold steel must have below characteristics.

(1) High wear resistance

In order to improve the rigidity and mechanical property, glass fiber and inorganic filler are variously filled into plastic material use to reinforce the plastic material, they are injected into the mold cavity with the melted plastic in high speed, it causing a great wear to the mold cavity, there for mold steel should have high wear resistance.

(2)High corrosion resistance

 Lots of resin additive such as fire retardant, even the plastic material itself may be corrosive. When the resin material is mixed with filler, it could intensify the damage to the cavity, there for the cavity must apply chroming or nickeling.

(3) High thermo conductive

During the molding process, good temperature control is very important to the quality of the part. Usually copper alloy have better thermo conductive than steel, but it has lower elastic modulus, hardness and wear resistance. The low thermo conductive of steel can be compensate by cooling system.

(4) Good dimension stableness

In the molding process, the cavity temperature can be up to 300℃, great temperature difference can cause thermal expansion and thus cause the unstable of the part dimension, therefor heat-treated and pre-harden steel is preferred for better dimension stableness.

(5) Polishing ability

The surface quality of the plastic part is determined by the cavity surface quality. So the polishing ability of the steel is important for injection mold. The steel must have a good polishing ability and have no defect such as pore.

The world's largest injection mold

Nothing can replace the role of plastic injection mold in the batch production, known as "the mother of industrial" Most of our articles for daily use is inseparable from the mold. Computers, telephones, fax machines, keyboards, glass and so on these plastic products is needless to say, like a car and motorcycle engine metal cover is also made of mold, a car will used more than 20000 kinds of mold.

This mold can take cover the MINI directly below, is the world's largest mold, the overall weight of 160 tons .Germany's GRAF use it to produce a huge collection and purify rainwater storage tank, the volume of a storage for 6500 litres. Through the wholechina injection molding, saves 30% of energy and 30-40% and raw materials. Due to the closed cooling water circulation, water consumption has been reduced a lot, and to provide manufacturers warranty for 25 years. GRAF has 60 patent for the tank and nominated for "the award of federal republic of Germany" and several awards, sell well in more than 60 countries.

Future tooling technology development--unmanned machining

Mold industry was late developed in China, gradually transform from a high mold manufacturing output country toward a highplastic injection mould quality country. In terms of the domestic market, both supply and demand are large, enterprise investment are enthusiastic, larger technological upgrading and new projects appear constantly.

With the development of economy, the innovation of industry, more and more requirement to the tooling equipment. Mold expert said, mold has a wide range of applications. Mold is single production, and with a particular user, its characteristics to participate in product design process, each mold are complex, need large amount of processing procedures, the unit price is high. At present, the rapid growth of the mold business gives machine tool field some momentum. At the same time, due to the improvement of mold technology, new requirements to the mold technical machine tool emerged.

In the Mold manufacturing process, should be in accordance with user requirements to innovate and retrofit combined with the design, in the process of installation and debugging is to constantly change and adjustment, the timely monitoring is very important, this gives special requirements to mold processing equipment and measuring equipment.

The current mold manufacturing are believed to have the developing direction of mold design, analysis and manufacture of three-dimensional; Mold software function integration, network, intelligence; No PIC of mold production; Single high precision parallel processing; Less humanization, unmanned processing. For NC machine tool meet the high speed, high dynamic accuracy, high rigidity, high thermal stability, reliability, and has the personalized characteristic of control system, all kinds of advanced software overall openness and compatibility of die casting tools supplier.

A new way out for mold industry

China mold manufacturer is fighting price war in a very long time, cause Chinese mold product stay in lower level in the world, China must change its strategy of competition, from the competition of product to the competition of brand, from the competition of market share to the competition of response speed to the market, from the competition of price to the competition of technology and additional value. Chinese mold enterprise should change the strategy of competition to get into higher level of world mold industry competition and get rid of cutthroat competition of price.

Mold industry is the integration of mechanical, electrical, chemical, optical, material and computer-assisted, precision inspection and IT technology, it’s a comprehensive system engineering. The tendency of molding technology development is larger in scale, more precision, more complex and shorter in lead time. Constantly improve the technical content of china custom mold, constantly shorten the mold manufacturing cycle, mold production towards informationize, refinement, automation, mold companies toward technology integration, well-equipped, product branding, management informationization and internationalization direction.

Use of injection mold to do ideal package material products

In the packaging industry, package injection mold process more and more people of all ages, the reason is that people use the multi-mold, hot runner technology which is an improvement. Through the use of thin-walled injection molding process can save costs of raw materials, other processes such as: Molds notation and multi-component technology, but also in order to reduce processing steps, increase production and improve efficiency has played a positive role.

Plastic packaging materials, especially in the industrial sector, due to its light weight and durability and good, in order to improve the standard of living today, we made a great contribution. Also take out the big industrial production and distribution of products around the world, if not the packaging material, it is unimaginable.

Overall, in the past few years the entire plastics packaging market, injection mold products for packaging materials, such as boxes or cups, are on the rise, and gradually replace the thermoformed packaging materials. From that point, you can infer the following trends: higher material costs and additional fees emissions, prompting people to use lightweight packaging materials. Performance packaging materials have become increasingly demanding. Due to globalization, processing and marketing of packaging materials, packaging materials to promote the rapid growth of output. The result is a multi-layer cavity mold has been widely used. This development not only for the production of an impact, but also spread to the product itself. While increasing productivity and reducing product weight has been a factor to be a priority, but still there will be some other issues, the use of plastic china injection mold products with good economic package.

Bring a new Double-head EDM in WIT MOLD

The advantages for Double-head EDM:

1. High efficiency: comparing with normal single EDM, Double-head EDM has two electrodes. When machining medium or big size part, the two electrodes can running at the same time in two different positions. Thus can greatly improve efficiency for customer’s big china mold, ensuring delivery time.

2. Reduce cost: Although the expense for CNC EDM is much higher than hands-on EDM, the high efficiency can reduce greatly in labor cost under the same capacity, thus help us offering more cost-efficient price to our customer.

The detailed parameters :

1. Machining size: 2000mm×1000mm

2. Stroke of X, Y, Z aixs: 1200mm×800mm×600mm

3. Maximal electrode: 200kg

4. Maximal machining weight: 1 ton

5. Surface roughness: up to 0.2μm

6. Operation system: DMEC system

As a china mold manufacturer, we have the more new technical to bring.

100% biodegradable plastics is supposed to put into production in Hainan province

By adding a special ferment into common polyethylene material, can makes polyethylene 100% degradable in natural environment. China Hainan province is supposed to put this unique plastic material into mass production.

The outcome into soil of the degrading is the same as traditional degradable material. The ferment helps to break the molecular structure of the polymer thus to achieve real biodegrading. This production is made by mixing ferment master batch into common polyethylene and achieve 100% degradable standard. Currently Hainan plastic resin enterprise and ferment technology supplier is doing market research. By the principal says, this is the unique 100% biodegradable resin in the world and already got the certification of CE. Currently British, German, Brazil, Taiwan and some other region had start to produce this material. Once the agreement is achieved, Hainan province will be produce this kind of plastic mold.

Mold knowledge training

Witmold Co.Ltd organize regular training of employees, and constantly improve the knowledge of plastic injection molds, to maximize service to customers, which is the spirit of our witmold!

Raise awareness of injection mold product management innovation of enterprises

Management Innovation injection mold products business refers to the injection mold industry in the context of innovation and control over new injection mold technology, the initiative to try new injection mold products processing environment, and then push the new changes in the quality and quantity on the injection mold. Injection mold enterprises should make management innovation, should grasp the following aspects:

First, the active pursuit of sustainable growth of enterprises injection mold, injection mold in today's rapid pace of growth sustainability has become a more important issue than the management efficiency of the injection mold companies are facing. Injection mold production process is an artificial system, its internal system can be reformed, which is the enterprise to achieve sustainable growth objective conditions.

Second, to enhance the operational capabilities of injection mold companies, and "agile management."

1. On the production side, there are in accordance with customer orders, any volume manufacturing of products and improve the ability of the service.

2. In marketing, there is value to the customer as the center, rich customer value, the production features personalized products and services portfolio.

3. In terms of organization, able to integrate internal and external business processes associated with the production and resources, through interaction and cooperation with suppliers and customers to create and play a competitive advantage resource leverage.

4. In management, change emphasizes command and control, conversion to lead, motivate, support and confidence up.

5. The mold changing modes of cooperation between enterprises, mold companies not only provide a variety of products and services only, you must also know how to put their core capabilities and technical expertise to properly combine the favorable competitive with other types of resources, to make up for their lack of and limitations.

Now the injection mold competitive market at this time. Management innovation is one of the important means of production and injection mold products business to modernize management. Mold enterprise management innovation can help companies increase economic efficiency, while driving the rapid development of the injection mold industry.