South Korea Automotive Shock Absorber Dust Cover Case Study
| Customer Region: South Korea | Industry: Automotive | Resin: TPE / TPEE |
| Machine Model: JS-550E custom machine | Cavities: 1 | Stations: 1 |
| Drive System: Hybrid with servo system | Productivity: 211 pcs/hr | Product Type: Automotive shock absorber dust cover |
Customer Background and Production Need
The customer is a Korean automotive parts supplier with production sites in several countries. It supplies automotive ducts and shock absorber dust covers to vehicle manufacturers in Korea, Japan, India, and the United States. Shock absorber dust covers are functional safety-related parts, so the customer needed stable physical properties, chemical resistance, and dimensional consistency.
Technical Challenge
TPE and TPEE materials have high melt-flow behavior and are difficult to keep stable during parison extrusion. Dust covers also have corrugated geometry, and wall thickness consistency affects flex life. The customer required in-mold deflashing to reduce downstream work and keep the part clean. Compared with injection molding, extrusion blow molding offered flexibility, but required stronger dynamic machine control.
Jonh Huah's Solution
Jonh Huah redesigned and customized the JS-550E extrusion blow molding machine for this material and product. The machine integrates drying and weight control and uses an accumulator-style injection design for fast, controlled parison delivery. Combined with parison control and mold automation, the setup supports automatic upper and lower deflashing.
Project Result
After installation, the dedicated machine met the customer's CPK requirements and produced TPE/TPEE dust covers at a public output of 211 pcs/hr. The same production concept was later extended by the customer group to factories in the United States, Canada, Mexico, and India.
Why This Solution Worked
This case required machine customization, material understanding, parison stability, and mold automation. Jonh Huah configured the machine for the actual TPE/TPEE behavior and the corrugated dust cover geometry. You can review more automotive and industrial cases or read more about extrusion blow molding process control.