A plastic runner cutting machine is used to remove excess plastic from injection molded parts. Here are some key details about plastic runner cutting machines:
- In injection molding, molten plastic flows through runners or channels to fill the mold cavities. This leaves behind excess plastic in the runners after the parts are molded.
- The runner cutting machine automatically removes these excess plastic runners to separate the molded parts.
- It consists of a feeding system, cutting mechanism (rotary blades or reciprocating guillotine), discharge chute and collection bin.
- The plastic parts come runner-attached from the injection molding machine into the feeder.
- As the parts pass through, the cutting blades trim off the runners right at the part surface.
- The runners fall off and are collected separately from the finished parts.- This facilitates easy recycling of the excess plastic runner material.
- Pneumatic, hydraulic or servo motors power the cutting mechanism for precise trimming.
- Blades are made of tough steel or carbide materials to withstand abrasion from the plastic.
- Different blade styles and angles are used based on runner size and plastic material.
- Automated systems synchronize the feed rate, cutting and discharge for high throughput.
- It allows processing parts from different molding machines since cutting is done separately after molding.In summary, plastic runner cutting machines automate the removal of sprues and runners from injection molded parts for improved efficiency and scrap recycling.
