PA Injection Parts

Features: thermoplastic, light weight, good toughness, chemical resistance and durability, burning

Identification method: yellow flame on blue background, burning vegetable flavor

Density: (g/cm3) 1.14-1.15

Equilibrium water absorption: 3.5%, with good wear resistance, self-lubrication and solvent resistance

The main products of Zhongwei Precision Machinery Co., Ltd. are nylon products, plastic products, ABS series, rubber products, etc. Types of injection molding materials that can be processed: polyethylene (PE), polypropylene (PP), nylon (PA, PA6, PA66), polyoxymethylene (POM), ABS, polyurethane (TPU), polyphenylene sulfide (PPS), polystyrene Carbonate (PC), Polyetheretherketone (PEEK), etc.

Product Description

1. Implementation standards: the company strictly implements ISO9001, ISO14001, IATF16949, VDA6.3 certification, and products have passed ROHS, FDA EU certification, etc.

2. Product material standards: ISO, GB, ASTM, SAE, EN, DIN, BS, AMS, JIS, ASME, DMS, TOCT, GB

3. Main processes: plastic injection molding, metal insert injection molding, investment casting, die-casting aluminum,

4. Available materials for injection molding:

Processable nylon products, plastic products, ABS series; injection molding material types: polyethylene (PE), polypropylene (PP), nylon (PA, PA6, PA66), polyoxymethylene (POM), ABS, polyurethane (TPU), poly Phenyl sulfide (PPS), polycarbonate (PC), polyether ether ketone (PEEK) and 3D printing can be customized according to customer requirements.

Product Performance

Since PA6 absorbs moisture easily, the drying temperature is 105℃ for more than 4 hours.

Melting temperature: 230-280°C, 250-280°C for reinforced varieties. The mold temperature is 80-90 °C, and the temperature of the fiber-added material mold should be greater than 80 °C. The shrinkage of PA6 is between 1% and 1.5%. Adding glass fiber additives can reduce the shrinkage to 0.3%,

Injection pressure: generally between 750-1250bar (depending on material and product design)

Injection speed: high speed (slightly lower for reinforcing materials)

Runners and gates:

The solidification time for PA6 is very short, so the location of the gate is very important. The gate diameter should not be less than 0.5*T (where T is the thickness of the plastic part).

If a hot runner is used, the gate size should be smaller than with conventional runners, as the hot runner can help prevent premature solidification of the material. If a submerged gate is used, the minimum diameter of the gate should be 0.75mm.

It is widely used in structural components due to its good mechanical strength and stiffness. Because of its good wear resistance, it is also used to manufacture bearings.

• PA66

1. The specific gravity of PA66 is 1.15, which is heavier than water and can be submerged in water. The shrinkage rate is 1.5-2.2%. The melting point of PA66 is 265 degrees, the molding temperature is 250-290, and the temperature of the fiber material is higher. Mold temperature is 80-120. When PA66 burns, the flame is blue with yellow, white smoke is emitted, the flame is easily extinguished, and the smell of celery is emitted. PA66 is firm, tough, opaque, easy to cut, and the cut surface is smooth. PA66 is the highest mechanical strength and the most widely used variety in the PA series. Its crystallinity is high, so its rigidity, hardness and heat resistance are high.

2. Runner and gate: Since the solidification time of PA66 is very short, the location of the gate is very important. The gate diameter should not be less than 0.5*t (here t is the thickness of the plastic part). If a hot runner is used, the gate size should be smaller than with conventional runners, as the hot runner can help prevent premature solidification of the material. If a submerged gate is used, the minimum diameter of the gate should be 0.75mm. 3. PA66 is more widely used in the automotive industry, instrument housings and its plastic products are closely related to our lives. For plastic materials, there are food-grade and non-food-grade plastics. Food-grade plastics are safer, such as pp, pet Wait, there are some plastics that everyone is very unfamiliar with, such as PA plastics. Some friends are curious whether pa plastic is food grade. So is PA plastic food grade?

PA plastics are not food grade plastics and have not been certified by the US FDA or NSF. PA plastic is an engineering plastic, which is a high molecular polymer containing an amide group, which is obtained by the bicyclic polymerization of lactic acid and ammonia. There are many varieties of PA, including PA6, PA66, PAll, PA12, PA46, PA610, PA612, PA1010, etc., which are all important synthetic material qualities in life.

Advantages of PA plastics

1. The abrasion resistance of PA plastic is higher than that of all other fibers, such as wool and cotton. The abrasion resistance of PA plastic is 20 times that of wool and 10 times that of cotton, and PA plastic is non-toxic, light in weight and excellent in mechanical strength. and good corrosion resistance.

2. PA injection parts are widely used, generally used in machinery, automobiles, home appliances, aviation, metallurgy and other fields. In civilian use, they can be blended or spun into various medical and knitted products.

The disadvantage of PA plastic is that the thermal stability and light resistance are relatively poor. In the process of production, it is necessary to add a variety of preparations for modification treatment in order to improve these problems.

It requires products with impact resistance and high strength requirements.

Post Injection Molding Process

1. Processing equipment: CNC, WEDM, lathe, milling machine, drilling machine, grinder, etc.;

2. Surface treatment: For some products that require subsequent processing, we can provide surface treatment services to achieve the special purpose of customers. At present, we can provide degreasing, polishing, electroplating (gold, silver, nickel, tin, galvanized, etc.), anodizing, electrophoresis and other surface treatment services for precision parts.

Moulds and Inspection Fixtures

1. Mold service life: usually semi-permanent. (except for lost foam)

2. Mold delivery time: 10-25 days, (according to product structure and product size).

3. Tooling and mold maintenance: Zhongwei is responsible for precision parts.

Quality Control

1. Quality control: the defective rate is less than 0.1%.

2. Samples and trial run will be 100% inspected during production and before shipment, sample inspection for mass production according to ISDO standards or customer requirements

3. Testing equipment: automated visual inspection equipment can carry out 100% inspection of products, spectrum analyzer, golden elephant analyzer, three-coordinate measuring machine, hardness testing equipment, tensile testing machine.

Application