Polyetheretherketone High Temperature Injection Molding Parts

PEEK is a high melting point thermoplastic. When the melt temperature is below 380 °C, the viscosity is sensitive to temperature changes, and when it is greater than 380 °C, it is sensitive to shear rate changes. It can be used for injection, extrusion, molding, blow molding, lamination, electrostatic coating. All kinds of Polyetheretherketone high temperature injection molding parts are processed by methods such as coating and secondary processing.

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 process conditions

It has high melt viscosity and high processing temperature, but has good thermal stability and is not easy to decompose. Since the performance of Polyetheretherketone high temperature injection molding parts is closely related to the crystallinity and crystal structure, the process conditions that are conducive to improving the crystallinity should be used as much as possible during processing. If a higher mold temperature is used in injection molding, a product with higher crystallinity may be obtained when the mold temperature is 180°C. When the mold temperature is 150~160°C, the surface layer of the product may be transparent and low in crystallinity, so the mold temperature is low. When the product should be annealed to remove internal stress and improve crystallinity, the heat treatment process is 200 ℃ x 1h or 300 ℃ x 20min. In addition, the raw materials need to be dried before processing, and the drying process is 150 ℃ x 3h.

The main process forming conditions are as follows:

(1) Injection molding

A screw injection machine can be used, and a screw with a high aspect ratio and a small compression ratio should be used when processing large or thin-walled and complex-shaped products.

The injection molding process is as follows:

PEEK can be extruded to process films

(2) Extrusion molding

Monofilament, rod, tube and wire, cable covering. When processing products with a diameter larger than 63mm and large products, the crystallinity of the inner and outer layers of the product is different, which will generate a large internal stress and cause the product to crack.

The PEEK extrusion molding process conditions are as follows:

Barrel temperature/℃

(3) Other molding

The mixture of PEEK and glass fiber, carbon fiber or mixed fiber is used to make high-performance composite laminates by lamination molding process. For example, the tensile strength of 70% unidirectional carbon fiber laminates can reach 1540MPa at 23 °C, and the tensile elastic modulus is 130GPa.

PEEK can use electrostatic spraying method or fluidized bed spraying method to form powder coating on metal products. The coating has heat resistance, corrosion resistance, water resistance and excellent electrical insulation.

PEEK can be processed by mechanical processing, ultrasonic welding, electroplating, sputtering and other methods for secondary processing, and can also be bonded with adhesives such as epoxy resin, polyurethane, and silicone.

PEEK can be rotationally molded or blow molded to process large containers or special containers for nuclear waste.

PEEK film can also be press-bonded with metal to make high-temperature reinforced composite materials.

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

Because PEEK has high performance and high price, it is mainly used for products with high temperature resistance, corrosion resistance, radiation resistance, high strength, high electrical performance and high performance requirements. It is used to replace stainless steel, non-ferrous metals, ceramics and thermosetting plastics. . The main uses of Polyetheretherketone high temperature injection molding parts and their modified and enhanced varieties are as follows:

1) In the sub-electrical industry

Using its solder resistance, flame retardancy, good toughness and other characteristics to make high-temperature welding electrical products, such as inlaid plugs, high-reliability connectors, cable plugs, chip cage coils, battery casings and IC packaging materials.

Corrosion-resistant, radiation-resistant, flame-retardant, low-smoke-resistant wire and cable cladding, junction boxes, and wiring leads used in aviation, aerospace, atomic energy, oil and gas wells, ships and marine equipment, chemical equipment, and high-temperature work equipment electrical insulating products.

It can be used as high temperature resistant, high frequency resistant, Class C insulating material, motor, generator slot insulation, capacitors, transformer films, high temperature terminals, connectors, terminators, flexible printed circuit boards and integrated circuit substrates, carrier band, etc.

2) In machinery and chemical equipment

Using its wear resistance, corrosion resistance, high temperature resistance (260 ℃), self-lubrication, oil resistance, fatigue resistance, good toughness, high strength, it can be used as bearings, gears, piston rings, bearing cages, metal bearing linings, gasoline Sealing rings (sheets), vacuum sealing rings, clutch parts, copier parts, high-strength and rigid, corrosion-resistant bolts; can be used as hot-water, steam-resistant high-strength parts, such as turbine loader blades, hot water and chemical pumps Body, impeller, steam valve, steam sealing ring, connectors for oil production, boiler pH meter sheath, boiler detection sensor parts, heat-resistant and anti-corrosion parts in chemical equipment, coatings, high-purity medium transmission pipelines, pipe fittings and valves, etc.

3) In aviation, aerospace and atomic power stations

It can be used as engine parts, sealing materials, exterior materials, wing deck packaging materials, igniter tubes, connectors, valves, turbine blades, brackets around motors, battery slots for rockets, fasteners, etc.

4) In automobiles, using its high strength, high rigidity, heat resistance, fatigue resistance, low wear and oil resistance and high lubricity, etc., make piston skirts, rotor brackets, bearings, bearing retainers, gears, gaskets, supports seat, tire internal pressure sensor housing, clutch gear ring, braking system, oil filter, etc.

5) In medical equipment, it can be used as surgical and dental instruments that are resistant to sterilization and repeated use. Because it is light, non-toxic, and can be organically combined with the body, it can be used as an artificial bone instead of metal. It can also be used as the heater and pressure sensor shell in the hemodialysis machine, and the membrane is also an excellent material for ion exchange.

6) In other respects, PEEK fiber and monofilament have better heat resistance, steam resistance, chemical resistance, abrasion resistance, creep resistance and toughness than polyester and nylon fibers, and can be commonly used as heat-resistant filter cloth, papermaking Machine-dried canvas, racket wire, reinforced plastic fibers can be used as heat-resistant, chemical-resistant textile belts and fabrics.

PEEK blow molding products can be used as nuclear waste containers, as well as microscope lampshades, laboratory tweezers, etc.