What is the key role of the exhaust design of bakelite molds in the injection molding quality of drill linkers?
Publish Time: 2024-12-16
In the fine process of bakelite molds for manufacturing drill linkers, the exhaust design is often hidden behind the scenes, but it firmly controls the lifeline of the final molding quality of the product.
At the beginning of injection molding, the molten bakelite material rushes into the mold cavity with air. If there is no proper exhaust planning, the air is trapped in it, just like a naughty "invisible wedge", causing many drawbacks in the drill linker after molding. If the material in the trapped air area is not fully filled, the surface of the finished product will be concave, just like the cratered surface of the moon, which seriously affects the dimensional accuracy and appearance flatness. When used for high-precision drilling operations, the connection with the drill bit is unstable, which greatly reduces the performance.
Furthermore, air compression generates heat, and local high temperature can easily cause bakelite to solidify prematurely, forming fragile "scars" inside the product - stratification or bubbles. These defects become potential stress concentration points. After being put into use, they are easily broken and shattered by the stress of the drill bit rotation, causing safety hazards. Especially when producing drill linkers with complex internal structures, air is more likely to accumulate in narrow gaps and corners. If one place is not vented smoothly, the chain reaction will cause the entire product to be scrapped.
The carefully crafted exhaust system is a good way to resolve the dilemma. By opening a narrow exhaust groove in the natural "airway" such as the mold parting surface and the insert joint, the width is precisely controlled at 0.02-0.05 mm, just like paving a secret path for air escape; deeply adapting to the flow characteristics of the material to ensure that the air goes out smoothly without interfering with the advancement of the melt. For the dead corners that are difficult to vent, metal sintered breathable components are implanted, and the fine pores are like a microscopic "breathable net", which efficiently absorbs and evacuates air without causing melt leakage.
Under reasonable exhaust design, the melt fills every corner of the cavity evenly and smoothly, the pressure distribution is balanced and stable, the finished product has consistent density, dense texture, no internal defects, and a smooth and smooth appearance. The drilled connectors are precise in size and fit perfectly with the drill bit. Whether it is industrial-grade heavy-duty drilling or precision instrument processing, they can stably transmit torque and withstand high-intensity operational impacts, becoming a reliable and durable tool accessory, demonstrating the key value of exhaust design in bakelite mold injection molding.
