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Plastic materials and their characteristics

      Plastic materials refer to materials that use polymer synthetic resin as the main component, have plasticity and fluidity at a certain temperature and pressure, can be molded into a certain shape, and keep the shape unchanged under certain conditions. Commonly used plastic materials are divided into thermosetting plastic materials and thermoplastic plastic materials. Thermosetting plastic materials are characterized by being able to solidify into insoluble materials under heat or other conditions. Thermoplastic materials are characterized by repeated heating to soften or cooling to solidify within a specific temperature range. In terms of performance, plastic machining service have the advantages of light weight, good strength, corrosion resistance, good insulation, easy coloring, products can be processed into any shape, high production efficiency, and low price.

      The versatility of the application of plastic materials is inseparable from its own characteristics. The composition characteristics of plastic materials are introduced below.

(1) Molecular structure of plastic materials

The main component of plastic machining  is resin. There are two types of resin, natural resin and synthetic resin.



(2) Composition of plastic materials

Resin: The main function is to bond other components of the plastic material and determine the main properties of the plastic material, such as mechanical, physical, electrical, and chemical properties. The proportion of resin in plastic materials is generally 40% to 65%.

Filler: also known as filler. Correct choice of filler can improve the performance of the plastic material and expand its scope of use.

Plasticizer: Some resins have very little plasticity and poor flexibility. In order to reduce the melt viscosity and melting temperature of the resin, improve its molding processing performance, improve the flexibility, elasticity and other necessary properties of plastic materials, usually Add a non-volatile high-boiling organic compound that is compatible with the resin. Such substances are called plasticizers.

Coloring agent: also known as coloring material, mainly for aesthetics and decoration, including paint part.

Stabilizer: Any substance that can delay the deterioration of plastic materials is called stabilizer, light stabilizer, heat stabilizer and antioxidant.

Lubricant: improve the fluidity of plastic material melt, reduce or avoid friction and adhesion to equipment or molds, and improve the surface finish of Plastic Machining Parts.

 

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What Is PTJ?
PTJ adopts flexible manufacturing methods to help our customers to control the product cost but best quality guranteed. Some frequently used machining processes include CNC milling, CNC turning, precision grinding, EDM machining, laser cutting, welding, CNC punching, sheet metal stamping, profile extrusion, die casting, forging, and more. Most of the custom precision cnc machining china parts and plastic machining components we made are related to automation machines, robotics, medical devices, fiber optics, aerospace/aircraft, test and measurement, sensors, telecom components, scientific devices, audio equipments, bicycles, boats, camera, cars, drones, electronic enclosures, front panels, furniture and architecture hardware, lighting, motorcycles, scooters, utv, jeeps, trucks, sports equipments, machinery, music instruments, and so on.
For Surface Finishes
Thanks to our mature supplier management and continuously experience accumulation. Now we have very stable surface finish suppliers to assist us to do different surface finishes with stable and excellent quality. Some Frequently used surface finishes are Anodizing, Oxide, Nickel Plating, Chrome Plating, Gold / Silver Plating, Powder Coating, Zinc Plating, PVD Coating, Passivation, Heat Treatment, Electrochemical machining, Brushing, Polishing, Sandblasting, etc.
General Tolerance of Equipments
1. CNC Milling tolerance: +/-0.01mm
2. CNC turning tolerance: +/-0.01mm
3. Precision grinding tolerance: +/-0.005mm
4. EDM machining tolerance: +/-0.005mm
How to Control Quality?
1. Inspection by machinist himself who is responsible for a specific part machining.
2. First article part inspection by QA.
3. IPQC patrol inspection during production.
4. PQC inspection before shipping according to ISO9001 sampling inspection standard for large quantity production. And for small quantity, 100% full inspection.
5. Material Certificates and outgoing inspection reports could be provided.
Our CNC machine and swiss machining shop sets full and advanced inspection instruments such as CMM, projector, height instrument, industrial microscope, micrometer, calipers, thread gauges, pin gauges, block gauges, etc. so as to inspect all details on drawings and confirm quality is good and issue the ourgoing reports accordingly.
How to Start Working with Our Company?
1) Sending detailed RFQ with 2D and 3D drawings to through email to info@pintejin.com. General drawing formats like PDF/ STEP/IGES/X_T etc are accepted.
2) We check and confirm about materials, surface finish and quantiy, and evaluate. If any question, our sales engineer would double check with customers until everything is clear. We will quote accordingly if we are ok to make the parts with best quality. If no question and everything is clear, we send quotation with best prices within 24 hours. Our sales engineer team is online for 7/24 for offering customers the best cnc machining services.
3) We recommend to start from few pcs prototypes for approval at the beginning. If nothing wrong after customer’s test and approval, then we proceed to volume cnc manufacturing.
Some Tips for Customers
a. We accept Paypal payment of small amount payment for samples or small batch orders for building mutual trust at the beginning. General payment terms is 30% by wire transfer, and balance before shipping.
b. Delivery time for few pcs samples are generally 5 to 7 days, and 15 to 25 days for volume production. If the order quantity was too big, we would check and confirm delivery time sepertely.
c. Our company has concrete promise to all customers that if any quality problem caused by our factory, we would remake all parts for free or send money back.
Safe Packing Methods to Prevent Goods from Damage during Transportation
Due to long distance transportation to overseas countries, safe and strong packing is very important to gurantee the parts to be in good conditions when arriving at customer’s hand. We choose different packing materials according to different parts and quantity. Some commonly used packing materials are pp/bubble bag, oil paper, foam, blister tray, 5 layer carton, wood box, etc. See below some packing pictures.