Characteristics of point Gate in Injection Molds
A point gate typically refers to a gate designed as a single small hole in a mold, whose primary function is to inject molten plastic into the cavity uniformly. Due to its simple structure and stable material discharge, point gates are often the preferred solution for small, complex parts and products with high aesthetic requirements.
I. Structural Design Characteristics
1. Simple and Compact
The point gate is usually small in size and structurally straightforward, making it easy to position in the mold.
Its single discharge outlet design leaves minimal gate marks on the product surface, reducing post-processing steps.
2. Concentrated Molding Pressure
Due to the point gate's short runner, molten plastic rapidly generates localized high pressure as it passes through, ensuring uniform cavity filling and reducing defects such as weld lines and air pockets.
3. High Precision Requirements
point gates demand high precision in mold manufacturing and machining. Strict control over dimensions, positioning, and angles is critical to avoid flow instability or poor mold closure.
II. Advantages
1. Minimal Gate Marks
The residual traces left by the point gate are barely noticeable, making it ideal for products with stringent surface quality requirements.
2. Simple Structure and Easy Maintenance
The straightforward design simplifies mold manufacturing, assembly, and repairs. Troubleshooting and corrections are relatively easy.
3. Uniform Filling Performance
With proper process parameters, point gates help maintain stable filling pressure, ensuring rapid cavity filling and minimizing internal defects.
III. Applications
1. Small, Precision Components
point gates are widely used in manufacturing small, high-precision products such as electronic device housings and medical device components, which require excellent surface quality.
2. Aesthetically Demanding Products
Products with strict appearance standards, such as household appliance panels and premium plastic goods, often use point gates to reduce post-processing and polishing efforts.
