Specific comparisons can be made in the following ways:

1. Mold design and manufacturing:
Small Plastic Parts: Molds are relatively smaller in size, but the aspect ratio (the ratio of depth to width of a molded part) is usually higher. Hence, finer machining may be required to produce small part details. Another consideration of mold design is the cooling system, which also has to be detailed to contribute to the proper distribution of cool air to eliminate any distortion.
Large parts: The molds are large and therefore machining takes into consideration the weight and strength of the material and also the most appropriate way to cool the mold to prevent bowing due to heat-induced stress.

2. Machining methods:
Small parts: Typically employ precision Injection Molded Products, micro injection molding, and multi-material injection molding, which provides the capability of fine detailed dimensions and tolerances of the part, and that is suitable when the size of the part is small and the structure is complex.
Large parts: Blow molding, injection molding Rubber Parts, rotary molding and the like may be applied due to their applicability in the production of large, hollow or large flat surfaced parts.

3. Material selection:
Small parts: High-performance engineering plastics, which can offer the necessary strength, wear, and chemical resistant properties, plus lightweight character of the part with wider availability of materials to at least say, engineer properly.
Large Parts: Improved fluidity and better processability of the material may be essential to achieve better material flow characteristics and compact the material in large molds.

4. Accuracy control:
Small parts: Higher accuracy is needed because even slight dimensional deviation may cause issues with the part’s functionality and joining. Hence he needs stringent tolerance control and numerous rigorous checks on the quality of the product.
Large parts: While accuracy is also important, the allowable limit of tolerances in parts that are big may be relatively bigger when compared to that on small parts, this is because big parts may have some room for being adjusted during the assembling process.

5. Production efficiency:
Small parts: Because of this it is often possible to use one multi-cavity mold to produce several corresponding parts simultaneously, which in the long run will help to save both time and money.
Large parts: As the size of the mold and cost is limited single cavity mold is normally used which means that the productivity is comparatively low. 

Product Categories : Injection Molded Products