Injection molds are hollow, like common positioning component, guide bush, etc. - usually made of stainless steel - into which molten plastic is injected to make the desired part or product. They have holes in the middle of the shape of the part or product - called the mold cavity. In addition to the shape of the mold cavity, the number of mold cavities can also vary depending on the number of different components or individual parts that need to be produced in each cycle.

Injection molds can be divided into three main categories: single cavity, multi-cavity and series.

Single cavity injection mold

Single-cavity injection molds have only one cavity that can be used to produce one product at a time. They are an efficient and cost-effective option for production operations with low order quantities or very large or complex parts. Single-cavity molds allow operators to pay more attention to each individual product to ensure there are no air pockets, unfilled parts of the mold, or other potential defects. These molds also cost less than multi-cavity injection molds for the same part.

Multi-cavity injection mold

Multi-cavity injection molds have multiple identical cavities. They enable manufacturers to inject molten plastic into all cavities at once and produce multiple products simultaneously. As a result, they offer shorter lead times for bulk shipments, increasing production efficiency, reducing delays, and lowering costs for high-volume or rush orders.

Home Injection Mold

Home injection molds are very similar to multi-cavity molds. However, instead of having multiple identical cavities, each cavity has a different shape. Manufacturers can use these molds to produce prototypes or different products that are sold together in single-variety packages. This type of mold facilitates the production of different products made from the same elastic material. However, careful arrangement and sizing of the cavities is required; if the family mold is not balanced, the fluid will not be injected evenly and may cause production defects.

Taizhou Huangyan Jinhong Plastic Mould Parts Co., Ltd. is an injection mold maker from China, its own plastic mold factory specializes in the production of positioning component, and guide bush.