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Plastic Injection Molding Machine - Blog
Double color injection molding is mixed dual color jet and two components jet which are matched with special designing complex nozzle can produce special patterns, need use the Double colorinjection machine with the revolve table system, and different colors on the base of using original mould, and increase the additive production value.
Dakumar is China professional for Double color injection machine, the model have: DKM140D,DKM260D,DKM280D,DKM400,
if you are looking for the Double color injection machine or two short injection machine,
Contact me about the double color machine:
Post by:Vivian
Tag: Double Color injection machinechina duoble color machinedual color injection machinerevolve table of dual color machineplatic double color productsbuy double color machine
Injection molding machines are widely used in the plastic injection molding industry.There are various of injection machine manufacturers and suppliers in the world for new injection molding machines and second hand injeciton molding machines.
For the second hand injection molding machines,as we are not sure its quality,and the after sales service is not as long as new injection molding machines.We are not suggest to buy second hand injection molding machines.
We may consider that why people want to sell their old machines,one thing is for the machine is not good,always in repairing,it affect the production efficiency;Second is that the old machine consume more power;The supplier won't be in this industry any more.
If we buy new injection molding machines from famous injection molding machine supplier,we do not need to worry about this.Dakumar Machinery could offer you a fine turnkey solution.
Post by Celina
Email: dkm@dakumar.com
: sinomould.dakumar7Help our west Africa friends to set up new plastic molding factories, offering our best service and make plastic factory get profit in the shortest time is our mission. SINO HOLDINGS, as the group company, we can take the advantage of each branch company and start our service to help customers from West Africa to start factory easy and fast.
With our great experience for sell injection molding machines worldwide during the last 20 years, Dakumar set up injection molding machine distributor in Brazil, Plastic molding machine suppliers in Colombia, Chinese Plastic molding machine agent in Turnisia, PVC molding machine seller in Ecuador, buy Chinese plastic molding machine in West Africa, Chines injection molding machine distributor in Latin America. And all the sales and after sales service system, we come up with more than 10 top engineers fly over the world to help plastic molding factories to run the machines, adjusting the mould, producing the plastic parts.
We offer them the full system for running factory, and give training for staff of the company, and tell the secret to get the minimum investment and maximum profit by running the plastic factory.
With our professional support, the new plastic factory owner can start the factory easy and quickly into organized condition, saving plastic material, run with low management cost and low handling cost for you set up plastic molding factory.
Everything can make your business fast and quick in return profit.
Welcome your enquiry and SINO HOLDINGS are so glad to extend our business cooperation to your land.
Contact Fancy: dkm@dakumar.com
Skype on line: 
sinomould.dakumar2
During injection molding process, many factors can affect the quality of plastic injection molding products during injection melding process. Many different deflects of injection molding products may arise, such flash, silver mark, bubble…
Flash （Burr）
Flash refers to excess material in thin layer exceeding normal part geometry of injection molding products. Many reasons can lead to this problem, for example, mold is over packed or parting line on the tool is damaged, too much injection speed/material is injected, clamping force is too low. It can also be caused by dirt and contaminants around tooling surfaces. So we can try to solve this problem by respectively by reducing the amount of plastic injected into cavity, improve the mold parting line, lowering injection pressure, choosing a larger injection machine and cleaning the mold surface.
Voids
A void means empty space within part. The void could happen at any area or part. It is not limited by the thickness but by the resin flow and thermal conductivity, but it is more likely to happen at thicker areas like ribs or bosses of injection molding products.
Lack of holding pressure (holding pressure is used to pack out the part during the holding time) is one of reasons. Too high injection molding speed may also lead to this problem because the plastic filling the cavity too fast, not allowing the edges of the part to form.
Flow Marks (Flow lines)
Flow marks are directionally wavy lines or patterns caused by slow Injection speeds. The plastic has cooled down too much during injection. So injection speeds should be set as fast as is appropriate for the process and material used.
In this passage we talked about Flash, Flow Marks and Voids, more defects of injection molding products will be talked in other passage. Please visitDakumar for more information.
Edited by Cina Zhu
E-mail: dkm@dakumar.com
Skype: sinomould-13
MSN: dkm@dakumar.com
PET preform is required for hundred thousand pcs of each multi-cavity PET preform mould.We have to get high speed injection in order to satisfy the quantity requirement.For the high speed injection,we could pay attention on several points for the preform mould and molding machines.
PET preform mass production line include PET preform mould,PET high speed injection molding machine,Hopper dryer,Water chiller,autoloader,robot to get long time automatical running.For the robot,usually it is used for collect the PET preforms in the mould and for better cooling.
PET high speed injection molding machine is very important during injection,as the PET preforms have very thick wall thickness,we need long time for the cooling and injection.If we could reduce the injection time,and the high speed injection molding machine could add raw material and demolding at the same time with mould opening,that will save much time of the injection molding cycle time.
Dakumar Machinery could offer you PET preform molding line,PET bottle mass production line,we could give you suggestions about the workshop,molding technology,staff training and device maintenance.Please contact with me 
if you need more information.
Post by Miss Celina
Email: dkm@dakumar.com
Skype:sinomould.dakumar7
MSN: dkm@dakumar.com
We shouldn’t start the injection machine if the temperature of the material barrel hasn’t reached the preset temperature. Screw of injection machine can be handled after the temperature of electric heating reaches to the set point about 30 minutes.
Every time after the injection molding machine have exceeded half an hour, it will be better to shut up the blanking mouth and clean up the plastic in the material barrel. And then set the heat preservation.
Avoiding the foreign material dropping into the material barrel to damage the screw and barrel material. Prevent the flifler and sundries from dropping into the hopper. If process recycling material, it needs magnetic hopper prevent scrap iron from entering into material barrel.
Avoid the screw idling and skid.
When using the new plastic, we should clean up the excess material which in the material barrel. When using POM, PVC, PA+GF, we should reduce the degradation of the raw material. After the injection machine has stopped, we should use ABS or other degradedmaterial to wash out.
We should prevent the POM and PVC from dropping into the material barrel at the time. Because it may cause serious industrial accident under the melting temperature.
- When finding the molten plastic emerge black spot or change color on the occasion that the temperature of the molten plastic is normal. We should check whether the non-return valve of the screw is damaged.
sinomould-17Choose auxiliary equipment for injection machine. Dakumar is an auxiliary machine supplier who offers high performance molding machine auxiliary equipment.
Injection machine can’t run plastic mould without auxiliary machine. There are many auxiliary machine that main includes auto loader, dryer, water (air) chiller, crusher, mixer, air compressor, etc. Big auxiliary equipment manufacturers in the world mainly from USA, Japan and Europe, most of the supplier has more than 40 years of history and experience, more reliable product quality, technology can also be more advanced. But after 20 years of rapid development, China's plastics processing industry, seems to become the world's largest production base. You can buy high quality auxiliary equipment from Dakumar.
Dakumar also offers high quality injection molding machine. If you feel interest of our injection molding machine or auxiliary machine, please contact me for detail information. Your enquiry and down visit is welcomed.
Auxiliary equipments for plastic injection,auxiliary injection molding machines supplier Dakumar Machinery offers all needed machines to meet your molding requirements.
Auto loader
Hopper dryer
Crusher
Mixer
Water chiller
Cooling tower
Mold temperature controller
Air compressor
Air filter
Robot (robot for IML system, robot for PET preform system)
Auxiliary equipments, together with injection machine help realizing plastic injecting. Dakumar has rich experience in molding field. Give us your injection machine specifications, we'll choose you the most suitable auxiliary equipment. Dakumar not only offers auxiliary machines, also offers different types of molding machines. Find more detail informations of auxiliary equipments and injection machines for plastic molding in Dakuamr Machinery.
Lucia
Skype: sinogroup-11
Mail: dkm@dakumar.com
Injection molding industry has boomed in China since last few decades. The mainly market of injection molding machinein China is NingBo and Guangdong. During last few decades, Chinese injection molding machine manufacturers become more and more. Theleading injection molding machine manufacturer in China now is Haitian injection molding machine. Besides Haitian, also have several famous brands like Borche, Yizumi, Dakumar … each brand has its own features.
Dakumar Machinery located in Huangyan, Taizhou, Zhejiang Province, it is one of the branch companies of Sino Holdings Group. Sino Holdings Group not only has the machine factory, the other main business is plastic injection mould. So our engineers not only have knowledge of machine, also have knowledge of moulds. So we can offer better solution for customers consider fully of machine and mould.
If you want to custom injection machines, pls don’t hesitate to send your inquiry to me.
Posted by Elaine
E-mail: dkm@dakumar.com
During injection molding process, many factors can affect the quality of plastic products during injection molding process. Many different deflects of injection molding products may arise, such flash, silver mark, bubble…
In another passage we have talked about Flash, Flow Marks and Voids, in this passage we will talk about Warping, Weld line, Silver marks.
Warping (Twisting)
Warping is the distorted part caused by too short cooling time, too hot material, a lack of cooling around the tool, incorrect water temperatures (the parts inwards towards the hot side of the tool) and uneven shrinking between areas of the part in injection molding process. We can avoid warping respectively by lengthening holding time, reducing material temperature……
Weld line（Knit line / Meld line / Transfer line）
Weld line is discolored line where two flow fronts meet. Reasons cause weld line may be too low mold/material temperature during injection molding (the material is cold when they meet, so they don't bond). Weld line can be minimized or eliminated with a mold-flow study when the mold is in design phase. Once the mold is made and the gate is placed, one can minimize this flaw only by changing the melt and the mold temperature during injection molding process.
Silver marks (Splash mark / Silver streaks)
Silver marks means circular pattern around gate caused by hot gas because there exists some moisture in the material, usually when hygroscopic resins are dried improperly. Too hot material during injection molding is also one of reasons.
In this passage we talked about Warping, Weld line, Silver marks, and more defects of injection molding products will be talked in other passage. Please visit Dakumar for more information.
Edited by Cina Zhu
E-mail: dkm@dakumar.com
Skype: sinomould-13
MSN: dkm@dakumar.com
Auxiliary equipments for injection molding machine is necessary when customer buy new injection machine. The most common used plastic auxiliary equipments have auto loader, hopper dryer, water chiller, mould temperature controller, crusher, and air compressor and so on.
How to choose plastic auxiliary equipments accordingly?
Auto Loader and water chiller are necessary for each machine, different size machine and different product will choose different model equipments. However for other equipments, it is not all necessary, it can be chose accordingly. For example, air compressor is used for the mould which need air ejector, like the thin wall container mould or preform mould, it need air compressor to use the valve pin.
For mould temperature controller, it is used to molding some special material like PC, it needs to keep the mould temperature in a certain value.
For crusher and mixer, it can be used separately not together with injection machine. Several injection machines can use one crusher.
If you want to buy the plastic auxiliary equipments for your machine, feel free to send me your inquiry.
Posted By Elaine
E-mail: dkm@dakumar.com
Lubricationand maintenance is very important to an injection machine, it will affect the machine life directly. Injection machine need lubricating oil for all the moving parts. During the injection molding, lots of moving part on injection machine making energy transformation; so the lubricating oil can reduce the wear abrasion.
Injection machine have automatic lubrication system for clamping unit. During the machine working, lubricating oil pump will offer oil to clamping parts automatically. Of course common injection machine has manual lubrication system for injection unit.
Injection machine don't have requirement on the lubricating oil brand and type. But different lubricating oil could not be mixed together, because they have different ingredient, it may reduce the lubricating performance, and damage the steel casting.
Posed by Ellen
Email: dkm@dakumar.com
