1. metal top cover: metal materials (such as aluminum alloy and stainless steel) can be selected to make the top cover. First, a top cover mold suitable for hand cranks should be designed and manufactured. Then, metal materials should be selected and processed by cutting, bending and welding. Finally, surface treatment (such as spraying and polishing) should be carried out.
2. Plastic top cover: You can also choose to use plastic materials (such as ABS and polypropylene) to make the top cover. The manufacturing process usually includes designing and manufacturing a mold, then heating the selected plastic material to a molten state, injecting the molten plastic into the mold through injection molding, demoulding after the plastic is cooled and solidified, and finally carrying out subsequent processing (such as trimming and polishing). ).
It should be noted that the manufacturing details of the handle top cover need to be determined according to the model and structural design of the handle, and customized according to the use environment and requirements. If you do it yourself, it is recommended to refer to relevant production tutorials or consult professional producers.