1. Principles of furan resin self-hardening sand production line design.
1.1 The production line links should be few and the structure should be compact.
1.2 The equipment host should be reliable, and the equipment of reliable production plant should be chosen according to the economic strength.
1.3 The investment should be small, and the auxiliary link should be prepared by ourselves as much as possible.
2. resin sand production line mainly includes sand mixing molding system and sand regeneration system.
2.1 sand mixing molding system including resin sand mixer, pneumatic vibration solid table and roller conveyor and other equipment, since the choice of hard sand mixer has a great impact on the performance of resin sand, the requirements of the sand mixer is accurate quantification, mixing and grinding uniformity, good film effect, but also consider the quality of equipment, maintenance and product prices. At present, the more common resin sand mixer is divided into intermittent and continuous type. According to the output of small workshop, cantilever type continuous resin sand mixer of 5~10t/h can be used. If the core quantity is large, it can be equipped with an intermittent sand mixer to mix the core sand.
2.2 The sand enters the sand mixer from the storage hopper through the screw feeder, and the resin and curing agent are controlled by the quantitative pump according to the required ratio.
2.3 The non-motorized rollerway can be made in-house. The use of stick channel and transition molding trolley can effectively expand the molding space, and the installation of vibration solidification table in the stick channel under the sand mixer can increase the compactness of the sand and improve the quality of the casting.
2.4 According to the characteristics of small casting workshop products of many varieties of small batch or single production, molding system should mainly use manual molding, do not have to form a mechanized assembly line.
3. Resin sand drop sand regeneration equipment to meet the quality requirements of recycled sand
3.1 Micronized content: If the micronized content is high, the amount of resin added should be high, so that the strength of resin sand is reduced. In order to reduce the micronized powder content, generally configure the dust removal system to take the measure of forced ash removal to achieve.
3.2 Scorch amount: small scorch amount is the main factor leading to defects such as porosity in castings, generally the scorch amount of cast iron parts is controlled at less than 3.0%.
3.3 Sand temperature determines the hardening speed of the sand: according to the production cycle, decide whether to configure sand temperature adjustment equipment. If continuous production, 2~3 days to open a furnace, can not be equipped with sand temperature regulator.
3.4 The main item of sand falling regeneration equipment is vibrating sand falling machine. Sanzhuji design and production of S56 vibrating crushing regenerator, with two cross-symmetrical vibration motor installed at the bottom, so that the old sand blocks hit each other, sand blocks in the vibration process broken, while relying on the friction between the sand blocks to remove the surface of the sand particles Resin film is removed from the surface of the sand and the old sand is regenerated. The equipment has the functions of sand dropping, crushing, screening and regeneration at the same time.
4. The sand conveying and lifting equipment can be flexibly combined
The belt conveyor with magnetic separation is used for horizontal conveying, and the bucket elevator can be used for vertical conveying. In the conveying process, dust removal equipment with forced ash removal should be equipped. Sand storage can be used for old things, if new system can be used cone type sand storage, the inclination of sand storage should be more than 60° to increase the effective capacity.
5. Dust removal and wind selection design
In resin sand production, there are several main sources of dust: dust formed after burning of resin film; powder formed after burning of paint; dust formed in the original sand after adding belt and sand crushing. Therefore, the dust removal equipment is required to have not only sufficient air volume, but also proper negative pressure. In the transformation of the small foundry, the original dust removal equipment can be used, and supplement the new dust removal points and air ducts, if the new equipment, can be used for the wind pressure of 5.2kPa fan, each ton of material each time the free air consumption of the suction and dust removal process for 500m? In addition, the upper part of the sand vibrating machine is installed with a suction hood to absorb dust when the sand is vibrating. At the outlet of the bucket elevator, dust removal equipment with adjustable wind power is installed to carry out wind selection.
6. The production of resin sand cast iron parts generally adopts alcohol-based coating
Spraying or brushing the alcohol-based coating onto the resin sand casting, and then igniting it to achieve surface drying, the coating and drying process can be completed within a few minutes, and the production cycle is short. According to the variety and batch of castings, you can purchase or make your own flow coating machine.
7. After manual sand dropping, the old sand enters the vibrating sand dropping machine through the feeding belt machine to complete sand dropping, crushing, screening, regeneration, and enters the bucket elevator through the conveying belt with by magnetic selection, and new sand is added manually in the conveying process. At the outlet of the bucket elevator, the wind-selected type sand enters the sand storage hopper through the belt conveyor. During production, the type sand enters the sand mixer from the sand hopper through the screw feeder.
Qingdao Sanzhuji Equipment Manufacturing Co., Ltd. specializes in the production of Green Sand Molding Line,Self-hardening sand molding line,foundry machines,Sand molding machine,Sand casting equipment,sand mixer,GS high efficiency rotary mixer,Resin sand mixer,no-bake resin sand mixer,Jolt squeeze molding machine/Jolt-squeezing moulding machines,Multi- Piston Moulding Machine/Hydraulic multi-piston moulding machine,sand casting molding machine,sand reclamation equipment，foundry molding machine,flaskless moulding machine,shot blasting machine,dust collector,according to the amount of old sand recovered Carry out plan customization, and provide sand reclamation equipment installation, commissioning, and training. Welcome guests to visit the factory.
