Hello, landlord: Generally speaking, the melting point of alloy should be lower than that of pure metal. There are many kinds of aluminum alloys with different melting points. For example, the melting point of hard aluminum (aluminum, copper, magnesium) is 641℃; The melting point of Al-Mg alloy is 568-652℃; The melting point of cast aluminum alloy is 520-645℃; The melting point of aluminum alloy profiles is 580-650℃. As a general plastic product (including nylon, the injection temperature will not exceed 300 degrees at most), the mold is completely competent. The structural design requirements of aluminum mold for plastic products: firstly, try to choose plastic raw materials with low molding temperature; Try to choose plastic raw materials with good fluidity; Try to choose plastic products with relatively simple processing shape and easy demoulding; Not suitable for producing plastic products with high molding pressure; It is not advisable to choose plastic products with too frequent production cycles.