Wooden molds are mainly used to make sand molds in the casting industry, and when making pump shell molds, special attention needs to be paid to the following points during the processing process:
1.Design Accuracy:
The wooden mold must be designed in strict accordance with the casting drawings to ensure that the size, shape and details of the mold are accurate, so as to ensure that the geometric accuracy and internal structure of the casting meet the design requirements.
2.Material Selection:
Choose dry, knot-free, crack-free, uniform wood to reduce shrinkage and improve mold life.
3.Machining fineness:
During machining, the mating surface and flatness of each part should be carefully treated, especially for the complex flow channels or internal structures that may exist in pump shell castings, to ensure that the wood mold can accurately replicate these characteristics.
4.Assembling & Fixing:
If the mold is composed of multiple parts, it is necessary to ensure that the splicing between the parts is tight, the gap is reasonable, and effective fixing measures should be taken to prevent the sand mold from loosening during the pouring process and causing casting defects.
5.Surface Treatment:
The surface of the wooden mold should be smooth and flat, avoiding burrs or unevenness, so as not to affect the quality of the sand mold. Sometimes a special coating or release agent needs to be applied to prevent resin sand or other binders from over-adhesion to the wood mold.
6.Durability Considerations:
Considering the reusability of the wood mold, it should be properly protected, such as anti-corrosion and moisture-proof, to ensure that it can still maintain good dimensional stability after multiple uses.
7.Exhaust and parting surface design:
Leave a suitable exhaust channel in the mold design to avoid problems such as porosity and sand hole caused by the inability of gas to be discharged during the casting process. At the same time, the correct design of the parting surface facilitates demoulding and reduces flash and burrs.
8.Safe Operation:
During the processing process, it is necessary to pay attention to the safety of operation, avoid sawdust splashing and injuring people, and comply with the operating procedures of relevant machinery and equipment.
9.Environmental Requirements:
With the improvement of environmental protection requirements, if conditions permit, the use of environmentally friendly wood mold materials or the gradual transition to other recyclable mold materials can be considered.
To sum up, processing wood mold pump casing mold not only requires high precision and high quality, but also should pay attention to the durability and safety of the mold to ensure that the final casting of qualified pump shell products.