Plastic LED Lead Frame Mold Cold Runner

What is a Plastic LED Lead Frame Mold Cold Runner?

An LED plastic frame mold is a specialized tool used to manufacture plastic frames for LEDs (light-emitting diodes). These plastic frames support and secure the LED chips or diodes. Through an injection molding process, plastic raw material is heated until molten, then injected into the mold cavity. After cooling and solidification, it forms the predetermined shape of the LED frame.

What is a Cold Runner in LED Plastic Frame Molds?

In plastic molds, a cold runner is an injection system that guides molten plastic from the injection molding machine nozzle to the mold cavity. The role of the cold runner in the injection process is to ensure the plastic smoothly and evenly fills the cavity, forming the desired plastic product.

Main Components of a Cold Runner System:

1.Main Runner: The channel connecting the injection machine nozzle to the mold’s secondary runners. Molten plastic first flows through the main runner into the mold.

2.Secondary Runners: Channels branching from the main runner, directing plastic to each cavity’s entrance.

3.Gates: The final portion through which plastic enters the cavity, typically designed as small holes or slits to control the flow rate and pressure of the plastic into the cavity.

Features of a Cold Runner System:

● Operates at Ambient Temperature: The cold runner system remains at ambient temperature during each injection cycle. After injection, the plastic in the runner cools and solidifies, being ejected along with the finished product.

● Waste Handling: The cooled runner plastic must be trimmed or separated from the finished product after each cycle, creating waste material.

Advantages of a Cold Runner System:

1.Simple Design: Compared to hot runner systems, cold runners are simpler to design and manufacture, reducing costs.

2.Wide Applicability: Suitable for various plastic materials and product types, especially for smaller production runs or cost-sensitive situations.

3.Material Waste: Each injection cycle produces waste plastic from the runner, which needs recycling or disposal, increasing material waste and handling costs.

4.Longer Cycle Time: Since the runner plastic needs to cool and solidify after each injection, the production cycle time is relatively longer.

5.Impact on Product Quality: The solidified plastic in the runner may sometimes affect the product’s appearance and quality, requiring additional processing steps.

Our Capabilities

Our LED plastic frame molds, compared to standard multi-cavity molds, feature higher cavity counts, more complex designs, and higher precision requirements. This demands extremely high manufacturing equipment precision, advanced technology, and extensive experience. In plastic molds, runners can be hot or cold, and LED plastic frame molds typically use cold runners, applicable to most SMD models such as SMD2835, SMD3134, SMD5050, SMD1516, SMD1515, and more.

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