高压造型机的压头分为平压头
1.震压式造型机:
对震实的砂型再进行压实,可以获得上下部紧实的砂型。常用的是微震压实式造型机,利用工作台下落与浮动的震铁相撞,微震紧实型砂,再进行压实。微震是以较高频率(500~1000次/分),小振幅(5~25毫米)的振动代替震击式造型机的低频率
(60~120次/分)、大振幅的振动。这种造型机造出的砂型质量好,对基础要求也较低。
1., the vibro pressure molding machine: compaction of the vibrating sand
mold can obtain the compact sand mold on the upper and lower parts. The
commonly used microtremor compacting molding machine is to compacted
the molding sand and compacted it by using the collision between the
falling of the worktable and the vibrating iron. Microearthquakes are
the vibration of low frequency (60~120 / sub) and large amplitude of the
shock type molding machine by vibration of high frequency (500~1000 /
sub) and small amplitude (5~25 millimeter). The sand mould produced by
this molding machine is of good quality and low requirement for
foundation.
2.震实式造型机: 此种造型机又可分为震击式和微震式造型机两种。砂箱和模样固定在造型机的工作台上,利用工作台下落时与砧座撞击面的相撞、砂粒的惯性来紧实砂型。这种造型机噪声严重,所造砂型上部的紧实度很低,已被微震压实造型机所代替。
2., the vibro molding machine: it can be divided into two types: jar and
micro shock molding machine. The sand box and the pattern are fixed on
the worktable of the moulding machine, and the sand type is compact by
using the collision between the table and the impact surface of the
anvil and the inertia of the sand grains. The noise of this molding
machine is serious, and the compactness of the upper part of the sand
mold is very low, which has been replaced by the microseismic compaction
molding machine.
3.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。
3., 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.