Casting foundry clean-up on any of the terms of the production processes are necessary. In addition to casting types, such as size, shape, weight, and production speed, capacity requirements will affect the choice of shot blasting machine, there are other considerations. Various molding process to produce thousands of castings line type and structure, there are a variety of cool matches, a combination of falling sand method. All of these upstream processes will affect the cleaning process requirements. In addition, the downstream production, such as casting the views of end-users will also affect the casting plant for blast cleaning equipment selection.
Casting for the ideal shot blasting is the best temperature close to ambient temperature, but each foundry"s different cooling time, so casting into the shot room temperature varies widely. Shot blasting machine, therefore the design should take into account the user produce the highest possible temperature, assuming that customers need for such extreme heat to clean up the casting, shot blasting machine design must meet these requirements, so that it can reduce the future maintenance, downtime and other security risks, including operational issues. General foundry use shot blasting machine can handle a high surface temperature of about 100 ° C casting. In this temperature, the appropriate type of rubber track conveyor shot blasting machines, and to choose steel or manganese steel tracked crawler-type shot blasting machine conveyor. At high temperatures, such as up to 175 ° C, when, it must be supplemented by a special high temperature sealing, curtain and the elevator track.
The high temperature will also make special demands on equipment maintenance, hot parts, hot hot machine combined with abrasive, for equipment maintenance, operational safety are a challenge. In this production, the bearing lubrication, conveyor design, vulnerability pieces of material composition, ventilation and control systems often have to be replaced. Chain and other non-combustible material for the replacement of rubber seals, curtains and track. Therefore, high temperature castings will affect the choice of shot blasting equipment, proper cleaning equipment to meet the high efficiency, safety and reduce maintenance requirements.
For sand casting, most of the sand is falling through the sand This process is removed. This will help cooling and reduce the workload next shot blasting grit removal. There are also foundries, eliminates the shakeout process, directly from the shot blasting machine sand to complete the task. Sometimes, casting into the shot room on the sand may be more than the metal itself, therefore, for such applications, shot blasting equipment needs to be designed with a special recovery system to deal with blasting process produced a large number of sand material, then through the magnetic separator or air classifier separator to waste sieving sand and round steel shot abrasive open.
If you choose to air election-type separator, the need to rely on a two-tier air wind the device, and with a second magnetic / winnowing design. Cleaning sand castings for high temperature, we must carefully choose separator, because high temperature will reduce the effect of magnetic separation. Such as dealing with real casting mold, to improve clean-up coverage to ensure that all surfaces of the workpiece are clean, the mold is usually placed on the table or rotary hook basket, and then into the blast room, side spin, edges and clear sand clean-up.
If the shot off the sand before the vibration is usually choose a vibration device or roller. Drum off the sand, using roll media, can reduce the adhesion of the sand in the casting surface, easy to clean up the next shot.
In the analysis of the upstream process required for the blast effects, the next step is to choose a clean-up category, such as the batch type or continuous-through, Yihuo a clean single. General Batch model including crawler, hook type, rotary blast machine, the advantage is shot casting time can be different according to different structure, shape, size adjustable, enabling one-time clean-up.
Crawler shot blasting machine is a high efficiency of mass clean-up systems, roll casting can be side by side to clean and does not damage parts. Automatic, cutting further improve productivity. Rotary hook type shot blasting machine is suitable for clean-up Thin or fragile, breakable items. Rotary blast machine for large castings or those who can not be rolling on the hook / chain can not load or can not easily fixed it on the workpiece.
Requirements for the production of high foundry, tend to choose continuous cleaning systems, including continuous crawler shot blasting machine, a continuous drum blasting machine, shot blasting machine and vibration tunnel through the mesh belt type shot blasting machine. For most consecutive clean-up operations, particularly our customers to clean up a variety of different structures and sizes of castings to determine the transport capacity of the system size and shot blasting chamber is very important, which can minimize the need for rework. Continuous Shot Blasting Machine must determine the size of customers to clean up the weight of the heaviest parts, casting volume and average hourly volume by tonnage.
Select either continuous or batch-type blast cleaning equipment, casting density is another important consideration factor, some models are designed for clean-up special casting types, such as cleaning cylinder block, cylinder head of the mechanical hand Automatic shot blasting machine, Artificial shot blasting machine, cleaning brake drum inclined belt shot blasting machine, cleaning roller wheel rotating cast pipe shot blasting machine, cleaning cylinder, cylinder head with automatic nozzles within walking beam and the roll-type cleaning machine . Hanging shot blast machine is a combination of batch type and style of two parts by the means of transportation for a variety of castings in high production cleaning requirements.
For the foundry, the most common process when carried out after trimming off the sand and shot blasting. Sometimes, the radio attached to the casting material to clean up the gate together with the casting sand; times, gate cleaning process is a clean-up separately.