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1254results about "Mould handling/dressing devices" patented technology

Chemical regeneration method in casting waste sand disposing process

The invention provides a chemical regeneration method in the casting waste sand disposing process, relating to a process for performing surface chemical processing on various impurities which are attached on the surface of waste sand and are better not be reused in casting-form sand materials. During the chemical regeneration, chemical surface conditioning liquid I or/and chemical surface conditioning liquid II is or are used, and the disposing sand temperature is not more than 400 DEG C. The chemical regeneration method in the invention is carried out before or after the hot-method regeneration disposing or mechanical regeneration disposing of the casting waste sand disposing processing, and the chemical disposing technique is combined with the traditional hot-method regeneration and mechanical friction regeneration. The regeneration new sand formed in the method has better quality of the new sand, can better meet the application requirement on multi-form sand producing technique (hot core box, warm core box and cold core box) for recycling different casting waste sands (hot core box resin casting waste sand, warm core box resin casting waste sand, gas or/and organic fat hardening cold core box resin casting waste sand and profile damp die casting sand), and has better economical efficiency.
Owner:CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP

Waste foundry sand regenerating process method

InactiveCN102009122AReduce roasting energy consumptionMould handling/dressing devicesFoundryCombustor
The invention discloses a waste foundry sand regenerating process method, which comprises the processes of crashing and screening, magnetic separation, roasting and graded screening. The roasting process particular comprises the following steps of: preheating waste sand which does not enter a furnace and air for combustion by using the heat of hot sand which is discharged from the furnace; controlling the roasting temperature of a roasting furnace to be between 780 and 850 DEG C by controlling a roasting furnace burner and the flow of the waste sand entering the furnace; separating roasted waste sand from waste gas by using a cyclone dust collector, a spraying dust collector and a bag type dust collector; and exhausting the separated waste gas to the atmosphere after passing through an alkali liquor washing tank and an adsorption tank, wherein the bag type dust collector has a high-pressure air flow blowback control bag dust-removing structure; and the dust-removing process and the normal operation of a system are maintained by controlling the bag dust-removing cycle of the bag type dust collector. Compared with the conventional method, the waste foundry sand regenerating process method has the advantages of greatly reducing energy consumption and guaranteeing the cleaness of the exhausted waste gas.
Owner:LIUZHOU AOKAI ENG MACHINERY

Waste sand recycling equipment and use method thereof

The invention relates to waste sand recycling equipment which comprises a vibration crushing screening machine, an old sand lifting machine, a magnetic separation machine, a hot-method regeneration device, a cooling bed, a vibration screen and a new sand lifting machine which are connected in sequence. A use method of the waste sand recycling equipment comprises the following steps of: a, adding waste sand into the vibration crushing screening machine, crushing the waste sand into small particles, feeding the small particles into the old sand lifting machine, conveying the small particles to the magnetic separation machine, and removing iron materials; b, feeding preheated waste sand into the hot-method regeneration device for sintering; c, cooling the high-temperature sintered sand through the cooling bed, feeding the cooled sintered sand into the vibration screen, and enabling the sintered sand to pass through the new sand lifting machine to obtain regenerated sand; d, preparing materials according to the following formula: 1.6-1.7kg of a methenamine solution, 2.7-2.8kg of phenolic resin, 100-300g of calcium stearate, 60-100g of silane and 150kg of the regenerated sand and/or raw sand; e, adding the materials into a stirring kettle in sequence and uniformly stirring to obtain precoated sand. The waste sand recycling equipment has the beneficial effects of simplicity for operation, high old sand recycling rate and simplicity for popularization.
Owner:金丰(新乡)矽砂有限公司

Process for regenerating forced scrubbing water glass used sand through wet method

InactiveCN101780521ANovel structureThe composition is compact and reasonableMould handling/dressing devicesMagnetic separatorEnvironmental engineering
The invention discloses a process for regenerating forced scrubbing water glass used sand through a wet method, which comprises the following steps of: firstly, loading collected old sand into a jaw crusher to perform crushing, and conveying the crushed old sand into a magnetic separator to perform magnetic separation; secondly, putting sand grains after the magnetic separation into a first stage spiral sand-water separator, a first stage wet method regenerator and a second stage spiral sand-water separator to perform sand-water separation on the old sand; thirdly, neutralizing the sand after the separation by a neutralizing sedimentation basin; fourthly, performing sand-water separation for the second time through a second stage wet method regenerator and a third stage spiral sand-water separator to ensure that water glass existing in the old sand can be thoroughly eliminated cleanly; and finally, performing dust elimination and drying to obtain sand grains namely the finished products which are put into a sand storage. The process adopts a device with a simple and novel structure, a compact and reasonable system composition and fewer wear-out parts. The process has a high elimination ratio of Na2O in the old sand, and the regenerated sand is good in quality and can be recycled repeatedly for use; besides, the process has small water consumption, realizes recycling by using water and plays a positive role in protecting the environment.
Owner:YIXING AOXING GANISTER SAND PROCESSING

Foundry used sand wet intermittent regeneration method and equipment thereof

A foundry used sand wet intermittent regeneration method and equipment thereof belong to a foundry used sand regeneration method and equipment thereof, aim to solve the problem of complicated process and narrow application scope of the conventional foundry used sand wet regeneration method, and further solve the problem of relatively complicated structure of the conventional regeneration equipment. The regeneration method comprises a scrubbing step, a second scrubbing step, a third scrubbing step and a checking step. The regeneration equipment comprises a stirrer and a sand-water separation device, wherein the stirrer comprises a support frame, a scrubbing cylinder, a drive cylinder, a motor and a main shaft, and the scrubbing cylinder is provided with a sand inlet and a water inlet and further provided with a water drainage valve and a sand discharge valve. By integrating the combined actions of mechanical stirring, water washing and acid cleaning, the regeneration method provided bythe invention has the advantages of convenience in control, low water consumption, high residual adhesive removal ratio and good sand regeneration quality; the regeneration equipment has the advantages of simple structure, low energy consumption, convenience in control and good sand regeneration quality; and the regeneration method and equipment are suitable for large-scale wet regeneration of used clay sand, used water glass sand and used alkaline phenolic resin sand.
Owner:包头市晟裕机械制造有限责任公司

Quick cooling device for sand of lost-foam production line

The invention discloses a quick cooling device for sand of a lost-foam production line, and relates to a cooling device. The quick cooling device comprises a cooling water tank, sand cooling metal tubes, a sand inlet hopper and a sand outlet hopper; the tank wall, close to the top end, of the cooling water tank is connected with a water outlet tube which extends into the cooling water tan; the tank wall, close to the bottom end, of the cooling water tank is connected with a water inlet tube which extends into the cooling water tank; the sand inlet hopper is connected with the outer surface of the tank wall at the top end of the cooling water tank; the sand outlet hopper is connected with the outer surface of the tank wall at the bottom end of the cooling water tank; the plurality of sand cooling metal tubes are uniformly arranged in the cooling water tank; the top end of each sand cooling metal tube is connected with the tank wall at the top end of the cooling water tank in a sealing manner; the top end of each sand cooling metal tube passes through the tank wall at the top end, and communicates with an inner cavity of the sand inlet hopper; the bottom end of each sand cooling metal tube is connected with the tank wall at the bottom end of the cooling water tank in the sealing manner; and the bottom end of each sand cooling metal tube passes through the tank wall at the bottom end, and communicates with the inner cavity of the sand outlet hopper. The quick cooling device has the advantages of being small in size, simple in structure, good in cooling effect, low in energy consumption, and the like.
Owner:LIUZHOU ZHIBAO MACHINERY

Casting mold forming apparatus and metal mold unit for use therein

This invention relates to an apparatus for molding a mold by pressurizing a foam mixture composed of particles of aggregate, water-soluble binders, and water, and injecting it into a cavity of a heated metal mold. This invention provides an apparatus which can use a foam mixture effectively, can fill the cavity of the metal mold with enough of a foam mixture, and can shorten the time to harden the foam mixture. To achieve these effects, the apparatus for molding a mold is comprised of a hollow rectangular-parallelepiped body 12 having a bottom plate 14, the bottom plate 14 having an injection hole 13 to inject the foam mixture, a means 10 for containing the foam mixture having functions as a mixing bath to mix particles of aggregate, water-soluble binders, and water, and as a pressurized vessel to inject the foam mixture into a metal mold, and a means 22 for closing and opening the injection hole 13. The apparatus is further provided with any means or any combination of means for measuring a temperature of the particles of aggregate or the foam mixture, viscosity of the foam mixture, and moisture of the foam mixture. Further, the means 103 for communicating gases from the cavity of the metal mold to the outside of the mold so that the particles of aggregate cannot pass through it is disposed in the metal mold.
Owner:SINTOKOGIO LTD

Combined treatment method for used water glass sand reclamation and reclamation treating liquid concentration

The invention relates to a combined treatment method for used water glass sand reclamation and reclamation treating liquid concentration. The combined treatment method comprises the steps of: adding used water glass sand reclamation treating liquid into a concentration device, and placing used water glass sand into a used water glass sand reclamation device; leading in water vapor being 100 DEG C or water vapor being above g 100 DEG C to the concentration device, heating, evaporating and concentrating the used water glass sand reclamation treating liquid; discharging secondary vapor from the concentration device to lead into the used water glass sand reclamation device; and spraying and leaching the used water glass sand with the led-in vapor, so as to obtain the reclaimed water glass sand. According to the combined treatment method for the used water glass sand reclamation and liquid concentration treatment, the removal rate on the residual adhesive films of the used sand is high, and the treating effect is good, the reclaimed sand subjected to dewatering and drying treatment can meet the casting requirement; and the water consumption is little, concentrated waste water is simply and feasibly utilized, the energy consumption is little, and the water glass sand can be effectively reclaimed and utilized, thereby saving resources and lowering the cost.
Owner:WUHAN TEXTILE UNIV
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