高压造型机
高压造型机的压头分为平压头、成形压头和多触头压头等几种结构形式。其中以高压多触头造型机应用最为广泛。高压多触头造型机压头分割成许多可上下运动的小方块─触头,通过液压缸可获得很大的压实力。压实时,各触头按其下面的模样高度(即受压砂层厚度)施加相应的压力,使砂型获得很高的、均匀的紧实度和硬度。这类造型机都设有微震震击机构,能够适应复杂模样的造型。高压多触头造型机多采用四立柱结构,有单工位式和双工位式。为了适应中小批量铸件的生产,这种造型机多附有模板快换装置,更换模板时,造型机不必停机。采用高压多触头造型,砂型铸造能浇出薄壁、尺寸精确、表面光洁的铸件。
The head of the high pressure molding machine is divided into several structural forms, such as flat head, forming head and multi contact head. Among them, the high-voltage multi contact molding machine is the most widely used. The head of high pressure multi contact molding machine is segmented into many small blocks and contacts that can move up and down, and a large compaction force can be obtained through hydraulic cylinders. When compacted, the contact pressure is applied according to the height of the underneath, that is, the thickness of the pressed sand layer, so that the sand mold can obtain high, uniform compaction and hardness. This kind of molding machine is equipped with microtremor and shock mechanism, which can adapt to the modeling of complex patterns. High pressure multi contact molding machine mostly adopts four column structure, with single station type and double station type. In order to adapt to the production of small and medium batch castings, the moulding machine is mostly equipped with the template quick change device. When changing the template, the molding machine does not need to stop. With high pressure and multi contact molding, sand casting can produce thin walled, precise and smooth casting.