Plastic injection molding machine

clamping tonnage 650TON to 1080TON

Plastic chair raw material:
Most of the plastic chair material are useing COPO-PP with MFI 6-30, the higher MFI the plastic chair will be softer, but the plastic filling  will be easier. Many plastic chair producer add 10 to 20% Talcum powder or other kind of calcium carbonate into the COPO-PP to make the plastic chair backrest, armrest and leg harder. In the same time to reduce some production cost due to the heavy competitive market.

Plastic production related auxiliary machineries

• water chiller or cooling tower

• autoloader

• mixer

• crusher

The chain safety device can protect the safety ofoperator and machine.
The material is thick ,strong and durable.
Well-distributed mixing can be done in a shot time, low energy consumption and high efficiency.
Time setting can be controlled easily and preciselyin the range of 0-15 minutes.
Chiller also provided cooling to cool lubrication oil in mian shaft.and transmission medium in hydraulic system of numerically-controlled machine tools, jig boring machines, grinding machines, processing unit,combined machine tools and all kinds of precision machines. Able to provided accurately temperature & effectively, reduce machine tools' deformation and improve processing accuracy.
Save energy & user friendly, no training required;
Strong cooling system without adjust thermostats, able to cool system rapidly;
Simple and easy to operate.

Good design ensures each device easy to service.

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·         Auto Loader

·         DKM - 330 / 360 series adopt single phase carbon brush motor with superior suction power and easy installation. It is particularly suitable for conveying new materials. SAL - 430 / 460 series use a three phase inductive motor with low noise level and long service life. It also has an automatic motor reverse cleaning device.

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·         Hopper Dryer

·         DKM series " Econo " hopper dryers offer an effective and low-cost method for plastic material drying. Hot air is used to dry wet materials that due to moisture absorption during packaging, transportation, and recycling cycles. They can be directly mounted on the moulding machine for quick drying and space saving. For this series, hot air blows evenly from bottom to the top ( both SHD-800 and SHD-1000 have down-blowing air pipe and accessible door for easy material clearance ) of the hopper with capacity ranging from 12 1000 kg.

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·         Crusher

·         DKM - 16 / 20 series low - speed granulators are suitable for by - the - press recycling of sprues they feature easy operation, excellent performance, low noise and dust level. They are in " Euro " style design and compact in size. High quality blades ensure long - life span. The high security grade also conforms with CE safety standard.

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·         Mixer

·         Both mixing pail and vane are made of stainlesssteel, easy to clean and absolutely no pollution.

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·         Water Chiller

·         The water chiller is to provided cooling process to plastic moulds to improve molded products quality & cut down injection cycle time.Hence maximizes plastic molding machines`productivity.

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·         Cooling Tower

·         Remove heat from the water discharged from the condenser so that the water can be discharged to the river or recirculated and reused.

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·         Mold Temperature Controller

·         Adopts PlD thermostat to provide dual(heating & cooling)control,maintains temperature, Precise temperature control within ±1℃；

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·         Air Compressor

·         The compact construction may meet the requirements of stable operation Many sets of compressors may be as- sembled on a steel baseplate with internal piping and line connecting each other, easily to fix. A complete set of sino-pm compressor equipped with efficient motor, Vee-belt drive, beltguard, high pressure switch and (delta-star, on-line) starter.

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·         Air Filter

·         Atmospheric air contains a mass of pollutants including dust, water aerosols, hydrocarbon and other gaseous contaminants by the addition of liquid oil, oil aerosols, oil vapor, (if an oil-lubricated compressor is used) liquid water, water aerosols, water vapor, pipe rust and scale as well as any extra micro-organisms that may be living, growing and multiplying in the compressed air lines. All of these unwanted, contaminants will arrive at the point-of-use of a compressed air system but can be removed by various filters depending on the level of clean compressed air required.

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·         Robot

·         PET Preform Beam Robots is dedicated to 350-1500CC PET Preform, applicable to PET Preform machine among 200-600 tons to get preform out, and also suitable for 1.16 cav. 1.48cav. preform production. Being installed on a fixed plate, take preform out and move to the outside of safe door. It is equipped with cooling system, so the forced air cooling after coming out preform can reduce the inmould cooling time sharply, so as to increase the production cavity.

Plastic injection molding is the primary process for manufacturing plastic parts. Plastic is known to be a very versatile and economical material that is used in many applications. Although the tooling is expensive, the cost per part is very low. Complex geometries are possible and limited only to mold manufacturability. Your computer monitor, mouse and keyboard are injection molded plastics.
Injection molding involves taking plastic in the form of pellets or granules and heating this material until a melt is obtained. Then the melt is forced into a split-die chamber/mold where it is allowed to "cool" into the desired shape. The mold is then opened and the part is ejected, at which time the cycle is repeated.
Design Considerations
Part design should include draft features (angled surfaces) to facilitate removal from the mold. Depending surface length draft angles down to half a degree are reasonable. Typical draft angles should be about 1 too 2 degrees for part surfaces not exceeding 5 inches. Dimensional tolerance specification will govern the part cost and manufacturability. If you have a small region of the part that needs higher tolerances, say the location of a critical feature used for alignment. DO NOT specify tight tolerance, instead design and plan for post molding processes such as machining using "assembly intent" fixturing.
Wall Thickness
Wall thickness for thin parts such as a soda bottle or ball point pen ink inserts are quite possible and economical. Thick wall sections are possible as well. Uneven wall thickness present challenges to the plastic molder manufacturer. Designing your part with uniform walls and cross section will simplify manufacturing and costing. At wall intersection or "tees" sinking will occur. Thick walls cool slower and greater shrinking will occur. Thin walls cool faster as thus, less shrinkage.
Radii and Corners
Maintain uniform wall thickness at corners. External and internal radius should share the same center point . External radii = internal radii + wall thickness. The minimum radii should not be less than 1/4 minimum wall thickness. Design for radii to be 1/2 to 3/4 of the nominal wall thickness. When significant stress is present, design in larger radius as larger radius distributes stress uniformly.
Ribs
Ribs should be 1/2 to 2/3 of the nominal wall thickness and less than 3 times thickness in height. Taper of 1 deg. is typical. Note: excess thickness promotes shrinkage. Excess rib height combined with taper will produce thin sections requiring extra fill time at the mold .
Bosses

·         Diameter = (Outside Diameter) \ (Inside Diameter) = 2 to 3

·         Thickness = 1/2 to 2/3 nominal wall thickness

·         Gusset Height = 2/3 Height

·         Height = Fastener minimum requirements

·         Taper = 1 deg. all around

·         Diameter Ratio should be minimum ratio of 2., this will reduce risk of failure.

Weld (Part) lines

location should be considered by design and the molder. Weld lines are formed at the mating of the flow fronts of the plastic during molding. The weld line area is more susceptible to cracks and stress failure.