Description
Since PTFE will not flow above its melting point, it cannot be injection molded and requires special processing techniques. Molded PTFE is processed by first compression molding the powder into preforms, and then sintering the preforms in a process analogous to sintered metal processing. This process creates geometric shapes that can then be machined, fused, and/or welded.
Automatic molding, a semi-automated form of compression molding, is the process Sunkoo uses for the manufacture of medium-volume to large-volume net molded and near net molded PTFE components. The automatic molding process requires dedicated tooling, typically requires minimal operator intervention and plastic parts can be fabricated relatively rapidly.
With the use of precise tooling and processing, parts manufactured using the automatic molding process can be produced to relatively close tolerances, but not to the accuracy of a fully machined part. Components are economically molded by utilizing a process of automated filling of the die cavity, applying pressure, and part ejection.
Other advantages of the Automatic molding process include:
· Little or no scrap material as compared to the “typical” PTFE machining process from stock shapes (rod or tube)
· Lower part cost, with minimal or sometimes no machining steps required
· Components that are molded and sintered into final forms and shapes have reduced stress defects compared to machined parts (from cutting, milling, etc.)
Product Description for Compression Molding:
The Sunkoo molding department has the capability to produce compression molded PTFE rod and tube stock to meet and exceed your exact specifications and tolerances. Sunkoo has over 1,000 mold sizes to manufacture stock shapes from 1” OD to 26” OD in Virgin PTFE, as well as all industry standard and custom blended materials. One of the benefits of compression molded rod or tube is the relatively low cost of this method. It typically does not require special tooling beyond what Sunkoo already possesses.
With an extensive array of in-house equipment, Sunkoo is your one-stop source to handle all aspects of your compression molding component requirements. Call the specialists at Sunkoo for immediate assistance.
The knowledgeable Sunkoo staff can work with you from initial concept, through to design, production and finish. With our expertise in a wide range of plastic materials, Sunkoo can recommend the best plastic resins, plastic compounds and fillers to maximize performance and be cost-effective in your specific application. Contact the Sunkoo staff and see if automatic molding is suitable and economical for your application.
The molding machine is equipped with automatic push-out function (as shown in the picture).
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| Model no | Cylinder DIA | Structure | Motor Power |
| 5T 200*200 | >Φ70 | upward pressing | 1.1 KW |
| 10T 200*200 | Φ100 | upward or downward pressing | 1.5 KW |
| 20T 250*250 | Φ140 | upward or downward pressing | 1.5 KW |
| 30T 300*300 | Φ160 | upward or downward pressing | 0.75 KW + 1.1 KW |
| 60T 350*350 | Φ220 | upward or downward pressing | 1.1 KW + 1.5 KW |
| 100T 420*420 | Φ280 | upward or downward pressing | 1.5 KW + 1.5 KW |
| 150T 520*520 | Φ320 | upward or downward pressing | 1.5 KW + 2.2 KW |
| 200T 560*560 | Φ360 | upward or downward pressing | 2.2 KW + 2.2 KW |
| 300T 600*600 | Φ420 | upward or downward pressing | 2.2 KW + 2.2 KW |
| 400T 800*800 | Φ500 | upward or downward pressing | 2.2 KW + 3 KW |
| 500T 1000*1000 | Φ560 | upward or downward pressing | 2.2 KW + 5.5 KW |
| 800T 1200*1200 | Φ750 | upward or downward pressing | 3 KW + 5.5 KW |
| 1000T 1500*1500 | Φ800 | upward or downward pressing | 4 KW + 5.5 KW |
| 1200T 1600*1600 | Φ900 | upward or downward pressing | 4.5 KW + 5.5KW |
| 1500T 1800*1800 | Φ1000 | upward or downward pressing | 4.5 KW + 5.5 KW |
| 2000T 2000*2000 | Φ1100 | upward or downward pressing | 4 KW + 11 KW |
| 2500T 1500*1500 | Φ1250 | upward or downward pressing | 5.5 KW + 11 KW |
| 3500T 2400*2600 | Φ1500 | upward or downward pressing | 5.5 KW + 15 KW |
| 5000T 2500*2800 | Φ900*4 | upward or downward pressing | 7 KW + 22.5 KW |
