Injection molding is a manufacturing process that produces parts through injection molding machines and molds. Injection molding uses plastic molding molds to make thermoplastics or thermosets into plastic products of various shapes. Products usually use rubber injection molding and plastic injection molding.

KENENG has professional thermoplastic injection molding equipment and has the ability to provide customers with short-term to long-term, small batch to large batch production. We manufacture custom injection molded plastic parts, where custom injection molding needs are specific. So if you have a product in production and are looking for a higher level of custom injection molding service, you can contact KENENG. We’ll help develop the most efficient mold for your product and help you make your existing mold more cost-effective.

Injection Molding Parts

Our Injection Molding Advantages

High product qualification rate

We have a strict quality control system, and the product qualification rate is as high as 99%.

Recognized by international customers

We became the designated supplier of Medtronic and BBC.


Rich manufacturing experience

KENENG has more than 20 years of experience in injection molding manufacturing.

Sincere customer service

Our 24*7 online service will ensure you get instant quotes.

Rich export experience

We specially set up a subsidiary company for foreign trade business and have 15 years of foreign trade experience.

Have a professional factory

KENENG’s factory covers an area of 10,000 square meters and employs more than 150 people.

Obtained multiple certifications

KENENG has obtained ISO9001, ROHS, Dun & Bradstreet certification.

Strong market share

We have occupied 50% of China’s electronics market (Keyu series battery box and holder).

Products Display

Injection Molding Materials We Can Provide

KENENG’s factory has professional and advanced thermoplastic injection molding equipment, which can provide customers with a full range of customized services for various materials.

Polyethylene

Polyethylene
  • Polyethylene, abbreviated as PE, is a thermoplastic resin obtained by the polymerization of ethylene.
  • Polyethylene resin is an odorless, non-toxic, white powder or granule with a milky white appearance.
  • Low water permeability but high air permeability, not suitable for fresh-keeping packaging but suitable for moisture-proof packaging.
  • The mechanical properties are relatively general, the tensile strength is low, but the impact resistance is good.
  • The heat resistance is not high, and the low-temperature resistance is good.
  • Low dielectric loss and high dielectric strength.
  • It has good chemical stability. It is resistant to acid, alkali, and saline solution at room temperature, but it is not resistant to strong oxidants such as concentrated nitric acid.
  • With low processing temperature and moderate viscosity, it is a kind of plastic with good processing performance.

Advantages of Injection Molding

  • The production speed is fast and the efficiency is high.
  • Automated operation is possible.
  • There are many types to choose from: there are many varieties of colors, shapes can be simple or complex, and sizes can be from small to large.
  • The size is accurate, the product is easy to replace, and it can be made into complex shapes.
  • Injection molding is suitable for complex-shaped products or mass production.

Main Types of Injection Molding

Rubber Injection

The molding method of injecting the rubber material directly from the barrel into the model for vulcanization is called the rubber injection method. The advantages of rubber injection molding are short molding cycles, simple processes, high production efficiency, low labor intensity, and excellent product quality.

Plastic Injection

The molten plastic is injected into the mold under pressure, and after cooling and molding, the various plastic parts formed are called plastic injection molding. The most commonly used plastics are ABS, PA, polyethylene, polypropylene, polystyrene, etc.

The Process of Injection Molding

Temperature Control

The temperature that needs to be controlled in the injection molding process mainly includes barrel temperature and mold temperature. The temperature of the barrel mainly affects the plasticization and flow of the plastic. The temperature of the mold mainly affects the flow and cooling of the plastic.

  • Barrel Temperature

Every plastic has a different flow temperature. Even if it is the same plastic, due to different sources or grades, the flow temperature and decomposition temperature are also different. The plasticizing process in different types of injection machines is also different, so the selection of barrel temperature is also different.

The barrel temperature is controlled in sections, which can be roughly divided into 3 areas:

1. Unloading area. In the area near the hopper, the temperature is generally set around the melting point of the plastic, and the temperature is lower. The purpose is mainly to preheat the material.

2. Plasticizing area. In the middle of the barrel, the temperature gradually rises above the melting point. The purpose is mainly to melt the material.

3. Anti-salivation section. It is at the front end of the barrel, the nozzle part. The temperature is usually slightly lower than the plasticizing section. The temperature of the nozzle should not be too low, otherwise, it will cause the early solidification of the melt to block the nozzle and increase the injection pressure, or the performance of the product will be affected due to the injection of the early solidified melt into the mold cavity. The purpose is mainly to prevent the molten material from flowing out of the nozzle under the action of internal pressure.

  • Mold temperature

Mold temperature affects the intrinsic properties and appearance quality of the product. The mold temperature generally depends on the size and structure of the plastic product, the performance requirements for the finished product, as well as the melt temperature, injection speed, and injection pressure.

Which Products Can be Processed Using Injection Molding Service?

Other services about KENENG

FAQ

A: For injection molding custom products, we have no MOQ.

A: KENENG understands the unique advantages and characteristics offered by different types of plastics and can provide you with sincere advice to find the type of plastic that best suits your requirements.

A: There are three main methods of the plastic injection molding process, namely hydraulic, electric, and hybrid. Each has unique advantages and disadvantages. KENENG can provide you with the most reliable and cost-effective processes and parts according to your specific requirements.

A: We provide customized services such as CNC machining, metal stamping, injection molding, etc. Besides that, we are mainly manufacturers and wholesalers of fasteners, springs, battery cases, button battery cases, etc.