Gas-assisted Injection Moulding

Large Enterprise Scale: Efficient and precise processing and testing equipment.

Wide Application Of Technology: A senior manufacturing enterprise with professional design, R&D and manufacturing teams.

Standardized Production: Passed ISO9001 certification and obtained relevant patent certificates.

High-Quality Customized Services: No intermediate links, providing one-stop service from design, processing, mold trial to mass production.

High-strength raw materials: The use of materials such as mold steel brings higher wear resistance, stronger toughness and better corrosion resistance to the mold.

Diversified product types: We design and manufacture plastic injection molds, including auto parts molds, household products molds, industrial product molds, crate molds, plastic container molds, pallet molds, etc.We also accept sample processing, including various plastic molding products.

Longer service life: Precision design and high-strength raw materials make the mold have a long service life. For example, the service life of Gas Aided Injection Mold can reach up to about 1,000,000 shots.

1. Saving Material

Compared with the conventional injection moulding process, it only requires 70% to 80% of the plastic material.

2. Creating Smooth Surfaces

It can improve the strength and stiffness of parts and eliminate dents in finished products.

3. Reducing Warping Deformation

To prevent dents and shrinkage, gas-assisted injection moulding pressurizes the exterior of the finished product. As a result, the finished product's internal tension won't increase and the warpage deformation issue can be reduced.

4. Reducing Cost

Due to the reduction of wall thickness, the total weight of the finished parts of parts is reduced.

Due to the reduction of mould locking power and injection moulding pressure, the cost of energy consumption is reduced.

Due to the integration of parts, the assembly cost is reduced.

Due to the low injection pressure, the mould locking pressure of the injection moulding machine can be reduced, and the injection moulding machine with a small tonnage can be used. Also, the cost of manufacturing is reduced, and the loss of the mould is reduced, thereby reducing the maintenance cost.

5. Reducing Cycle Time

It can save the finished product time before it reaches the market since the pressure holding technique was modified, which reduced the injection moulding cycle time. In most cases, this will lead to increased product production and increased productivity as a whole.

Before injection moulding can begin, manufacturers need to create custom moulds for their products, solving the basic problem of how to make plastic moulds. This process mainly considers four factors:

1. Design: First to consider the size, dimensions and complexity of the product.
2. Quantity: It matters how many parts you plan to make. The mould may make many items at once and have multiple cavities for the basic product. Moulds can be produced using more pliable, perhaps more expensive materials for high-volume production or lighter, less expensive materials for low-volume orders.
3. Material: Depending on the plastic or resin chosen for the product, the mould will require specific design features.
4. Budget: Consider the total budget available for the mould, this will determine the quality of the mold material and whether it will be for a single part or a multi-unit mold.

1. Prepare Misterdal & 3D Mould Design Confirmation
2. Material Hardness Testing & Size Measuring
3. CNC Rough Machining
4. Hardening & Tempering
5. Grinding
6. Deep Drilling
7. CNC Finish Milling
8. Wire Cutting
9. EDM
10. Drilling
11. Engraving
12. Polishing
13. Mould Match
14. Mould Trial Twice
15. Mould Disassembling Inspection Before Shipment
16. Photos ( oiling& packing )Before Shipment

There are many applications for gas-assisted injection moulding, including:

• Automobiles: seat backs, door panels, steering wheel, and instrument panels that are lightweight.
• Consumer goods: toys, basketball racks, appliance parts, and furniture items like chair backs.
• Aerospace: interior panels, seat frames, and air ducts.
• Electronics: cases, housings, and supporting elements.
• Industrial equipment: handles, and enclosures.
• Protective cover: the majority of the plastic casings on devices like laptops, eyewear, and medical gear.

1. Polypropylene (PP)

Polypropylene, a thermoplastic material, has a high melting point, good hardness, poor electrical conductivity, and good chemical resistance. PP is useful in electrical and electronic components due to its low electrical conductivity. Additionally, the moulds of food industry use it frequently because this material meets safety standards.

2. Acrylonitrile Butadiene Styrene (ABS)

ABS is useful for a variety of applications thanks to its combination of strength, toughness, and lightness. Due to its ability to withstand sudden forces without breaking, ABS with impact-resistant is useful in a number of daily object mould, including automotive parts, protective cases, household appliance parts, and more.

3. Polycarbonate (PC)

Polycarbonate can sustain severe impact forces, and it has a strong resistance to wear and abrasion, which prolongs the life of the moulded parts. It may be used for a variety of moulds, including autos, lighting fixtures, medical equipment, and more because it can maintain its toughness and mechanical capabilities throughout a broad temperature range.

4. High-Density Polyethylene (HDPE)

HDPE has outstanding weather resistance, high hardness and strength, and is chemically inert. It is a material used in a range of consumer and industrial product moulds, such as bottles, pipes and so on.

5. Low Density Polyethylene (LDPE)

LDPE has the advantages of being water resistant, having little chemical reactivity, and having good impact strength. For chemically delicate applications like toys, household goods, and agriculture, it is an excellent choice to made moulds.

6. Nolyamide (Nylon)

High damping coefficient, chemical and thermal resistance, high hardness and wear resistance all characterize nylon. It works best for moulds of rugged applications like wear pads, wheels, sports equipment, etc.

In gas-assisted injection moulding, only 70% to 80% of the mould's cavity is filled with plastic material. Nitrogen gas is fed into the mould through specially engineered and positioned air inlets, creating the pressure necessary to force the plastic toward the end of the cast as the molten plastic in contact with the mould walls starts to solidify. The bubble's route is controlled by centering it away from the cooler mould walls by following the path of least resistance through the hottest, least viscous plastic. The moulded part is then ejected. Compared to the hollow parts made by conventional injection moulding, those made with this technology are less expensive. During this procedure, the moulded components also cool more quickly. Shrinkage is typically less because of the hollowed-out region of the thicker wall.

Internal Gas-assisted Injection Moulding

The internal gas assisted injection moulding is forced to expand and fill the mould by injecting the gas into the center of the parts. There is a hollow channel in the middle of the part. After adding gas, inject the remaining resin, which helps the resin fill the parts before packaging. This method is specially used for thick section parts and lighter hollow parts.

External Gas-assisted Injection Moulding

External gas assisted injection moulding refers to where the gas injection occurs on one side of the part outside. High-pressure gases push out the undecomposed resin and fill it on the other side of the tool. Because the gas is responsible for filling the resin into the tool, the injection pressure can be lower. This method can easily fill the thick geometric shape to avoid shrinkage or warp. It is most suitable for plastic parts with high outlines and large surface areas, especially those parts that require meticulous texture and excellent surfaces.