Corrosion-resistant POM Injection Molded Parts

POM materials are not resistant to strong alkalis and oxidants, and have certain stability to alkenoic acids and weak acids. It is resistant to hydrocarbons, alcohols, aldehydes, ethers, gasoline, lubricating oils and weak bases, and can maintain considerable chemical stability at high temperatures. Low water absorption and good dimensional stability. The weather resistance of Corrosion-resistant POM injection molded parts is not good. Under the action of ultraviolet rays for a long time, the mechanical properties will decline, and the surface will chalk and crack.

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

1. What material is POM?

POM is a kind of linear polymer with no side chain, high density and high crystallinity. It has excellent comprehensive properties and is known as "super steel" or "race steel", also known as polyoxymethylene.

2. Characteristics of POM material:

(1) The density of POM material is 1.42g/cm3, which has very high mechanical strength and rigidity, so it is commonly known as "Saigang".

(2) POM material has excellent properties such as fatigue resistance, creep resistance, wear resistance, heat resistance and impact resistance, and has a small friction coefficient and good self-lubrication.

(3) POM material is not easy to absorb moisture, and the water absorption rate is 0.22-0.25%. It has good dimensional stability in a humid environment, and its shrinkage rate is 2.1% (larger), and it is difficult to control the size during injection molding. The heat distortion temperature is 172°C, so the environmental resistance is very good.

(4) POM material has strong resistance to repeated impact, good resistance to organic solvents, and has a wide range of operating temperatures (-40℃~120℃);

(5) POM material has good electrical properties, good recovery, good wear resistance, and excellent dimensional stability.

But the fly in the ointment is that the pom material has poor weather resistance, poor adhesion, thermal decomposition and softening temperatures are close, and the oxygen limit index is small.

3. Is POM plastic toxic?

Although its scientific name is called polyoxymethylene, POM plastic is actually non-toxic.

(1) POM plastic is a non-toxic, hard and dense material with a smooth and shiny surface. POM plastics are linear polymers with high density and crystallinity. According to the different chemical structures in its molecular chain, it can be divided into two types: homo-formaldehyde and co-formaldehyde.

(2) POM plastic has high strength and stiffness, good elasticity and good wear resistance, and also has excellent mechanical properties, very close to metal. The mechanical properties of POM plastics are relatively stable and change little with temperature.

(3) POM plastics have a wide range of uses. They can be used to synthesize high-quality automotive paints, urea-formaldehyde resins, phenolic resins, etc. and various adhesives. They can also be used to synthesize paper strengtheners, and even medical * and disinfection.

4. The difference between POM and nylon

The difference between POM and nylon is quite big, as follows:

(1) The ingredients are different

POM is a kind of synthetic resin, also known as polyoxymethylene resin, POM plastic, steel material and so on. Nylon is the first synthetic fiber in the world, a common name for polyamide fiber (nylon), which can be made into long or short fibers.

(2) Different in nature

POM is generally presented as white or black plastic particles, and then processed into various products, which have the characteristics of high hardness, high rigidity and high wear resistance. Nylon has high mechanical strength, good toughness, and high tensile and compressive strength.

Corrosion-resistant POM injection molded parts have good solvent resistance, oil resistance, weak acid, weak alkali and other properties, and also have high hardness and rigidity, high creep resistance and stress relaxation ability, excellent wear resistance properties and self-lubricating properties.

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

Nylon has non-toxic, light weight, excellent mechanical strength, wear resistance and good corrosion resistance, so it can be used to replace copper and other metals in the manufacture of bearings, gears, pump blades in machinery, chemical industry, instrumentation, automobile and other industries and other parts.