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Company profile

JDmoulding is an injection total solution provider, we ensure services from idea to drawing to mold design to finished products launched to market.Its engineering team has many years and much experience on high precision molds design and manufacturing, rapid heating and cooling central temperature control system. Its research ranges cover rapid heating and cooling mold designs, equipment and central control system. Its team members are with much experience on injection production also.we can use RHC technology to solve wrpage.weldlines issues.

warpage

When plastic material is injected into a mold cavity, it is cooled and solidifies to form a part that is made to final part dimensions. However, if the cooling of this part in the mold is not uniform differences in part shrinkage can occur, causing the part to distort. This condition is referred to in the injection molding industry as warpage. Warpage is also the result of excessive stresses that are built into a part during the molding process.

Causes

1. An injection speed that is too fast will increase the melt temperature, forcing the melt to overpack the cavity. This overpacking creates molded-in stresses in the part, which warp the part

2. The injection speed is too slow, the viscosity of the material increases the amount of packing pressure needed to fill the cavity. This higher packing pressure adds molded-in stresses in the part, causing warpage

3. Long injection forward times contribute to part warpage by allowing more time for more material to overpack the cavity

4. Check ring wear can cause shot-to-shot consistency, creating overpacked parts

5. If the gate has not sealed off before the cavity is full, overpacking occurs causing warpage

6. If not enough gates are used to fill a part, higher packing pressures occur to

ill out the part, producing molded-in stresses

7. Smaller gate sizes cause a high degree of molecular orientation in the polymer that causes different shrinkage in different directions of the part (machine vs transverse)

8. Insufficient cooling times do not provide enough time for the part to cool, Increasing shrinkage

9. Running the mold halves at different temperatures can cause shrinkage in one direction to help overall warpage. Parts have a tendency to warp toward hotter mold halves since this causes higher shrinkage

10. If ejection forces are uneven due to ejector pin placement or length stresses can be induced in the part causing warpage

11. Differences in wall thickness promote warpage since thin sections cool faster. thicker sections cool slower

12. Sharp corners can promote molded-in stresses that can cause warpage

Solutions

1. Decreasing the melt temperature if the injection speed is too fast

2. Increasing the injection speed to decrease the holding pressure needed to fill the cavity

3. Limiting the injection forward time

4. Replacing check ring

5. The gate seal needs to be measured to assure that the cavity is not full before gate seal takes place

6. Increasing the number of gates reduces the packing pressure by distributing the pressure over a number of gates

7. Larger gate sizes reduce orientation

8. Increasing cooling time or fixturing the part are options to prevent the part from distorting

9. Location and placement of cooling lines should be reviewed to ensure that even efficient cooling is taking place to the part

10. Improving or modifying pin design can reduce part warpage

11. Uniform wall thickness helps avoid warpage Issues

12. Removing sharp corners can reduce molded-in stresses and reduce stresses that can be caused during part ejection

Plastic Mold (Moulds)production process Description

Shenzhen Jiding Technology Co., Ltd(JiDing) is a high tech company with independent R&D Capability. Its engineering team has many years and much experience on high precision molds design and manufacturing, rapid heating and cooling central temperature control system. Its research ranges cover rapid heating and cooling mold designs, equipment and central control system. Its team members are with much experience on injection production also.

The company has intelligent properties and patents on mold temperature controlling mahcine. JiDing’s mold machine got CE certification and was underwritten by international insurance company(Fubon Insurance) .

JiDing had designed more than 1000 sets of mirror or texture molds for customers. Now its one cycle heating and cooling mold temperature machine has developed into its 7^th generation also.

JDmoulding is an injection total solution provider, we ensure services from idea to drawing to mold design to finished products launched to market.

Our Moto: Best Energy Saving, Best Service

Rapid Heating and Rapid Cooling injection Technology Faetures and Advantages

1.Make plastic part structure more sturdy,stress tolerance and falling tolerance,after eliminating flow mark,vent mark and welding line on product surface.

2.Eliminate rich fiber on product surface made by fiber glass material,can reach Mirror effect of fiber glass material product and strength its hardness and anti-scartching(PC+50%GF Applicable)

3.Eliminate welding line,vent mark and improve stress marks on textured surface,and reach more clear and natural texture under even mold temperature.

4.Rapid temperature rising and cooling inside mold may improve or eliminate rib mark,stress mark and inner stress mark,and so on.

5.Eliminate welding lines on plastic parts to be plated,reduce cracks on plated surface.Free of polishing process before plating,increase yield rate of plating parts and make plated parts with perfect appearance.

6.Rapid temperature rising and cooling,front mold and rear mold temperatures can be adjusted independently,issues of shrinkage,

transform and warpage are settled,injection part dimension is more precise.

7.When moulding under high mold temperature,melt resin flow well inside mold,injection pressure reduced,energy save and lifespan of injection machine last long.

8.Can eliminate hot runner mark and make injection part perfect.

9.For thick wall of plastic parts,rapid heating and rapid cooling production advantage is obvious,and reduces 30-40% cycle time.

10.Rapid heating and rapid cooling injection technology coordinates with many paint free materials,it's not limited by product structure.Parts made by Rapid heating and rapid cooling injection technology are perfect in appearance,and realize painting free to avoid second time processing and cost saving.

What we do :

1. High precision mold design and manufacturing

2. Mold Temperature Controlling machine Design and Manufacturing

3. Plastic Injection Production

4. Product Total Solution Provider

5. Game Station accessories design and manufacturing

6. Electronic Products Design and Manufacturing

7. Mirror or Texture Molds Design and Manufacturing

8. Home Apliance Molds Design and Manufacturing

9. Medical Product Molds Design and Manufacturing

10. Automobile Interior Parts and Precision Accessory Design and Manufacturing

11.Daily Skin Care Package Molds Design and Manufacturing

12.Painting Free Injection Parts design and manufacturing

13.Home Apliance Frames design and manufacturing

14. Rich Fiber Parts design and manufacturing

15. Plating Parts design and manufacturing

Our Clients: