Sand mould vacuum pressure casting technology and equipment
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of vacuum pressure casting and sand moulding, which is used in the field of high density production, can solve the problems of long production cycle, poor structural stability of cold-worked materials, deformation of parts, etc., and achieves the effect of ensuring cleanliness and avoiding shrinkage and thermal cracking.
Inactive Publication Date: 2005-06-01
李泽奇
View PDF0 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
However, the overall material consumes too much processing time, the production cycle is too long, and due to the poor stability of the cold-worked material structure, for some precision thin-walled parts, it often occurs that the parts are scrapped due to deformation at the end of processing.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0027] exist Figure 1 , Molding: Use quartz sand as the raw material of the sand mold, mix it with high-strength no-hardening resin, shape, repair, and temperature aging. The shape can withstand a pressure difference of ±1 MPa, and the temperature is aged for 8 hours. The casting tank is equipped with a pressure gauge 9, a vacuum negative pressure gauge 10, a vacuum valve 11, a pressure valve 12 and an exhaust valve 13. The vacuum valve is connected to the vacuum through the vacuum tube 14. Tank 15 and vacuum pump 16 are connected, pressure valve 12 is connected with pressure tank 18 and air compressor 19 through pressurized pipe 17, vacuum tank is equipped with pressure gauge 20, and pressure tank is equipped with safety valve 21 and pressure gauge 22.
[0028] exist Figure 5 , put the sand mold base 1 into the casting tank 7, fix the sand mold 2 and close the mold. The ladle 15 is hung on the casting frame 24, the casting cup and the pouring cup 4 are installed, the refi...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention provides a sand mold vacuum pressure casting process. The main feature is to use sand as raw material, use resin or mix well, shape, repair, temperature aging, clamp and position the sand mold, put the melt, pouring cup, and sand mold in the casting tank, and then vacuumize it before working Then cast and pressurize to cool and solidify to achieve a compact casting structure. After releasing the pressure, open the door to take the sand mold, and get the blank after sand cleaning. The present invention also provides a sand mold vacuum pressure casting equipment. The sand mold base, sand mold, castings, pouring cups, ladles, and molten metal are all packed in a casting tank, and the door is closed to form a system. Operated according to the process, the peripheral equipment of the casting tank is There are pressure gauges, negative pressure gauges, vacuuming, pressurizing and exhausting devices. Using this technology avoids the phenomenon of shrinkage and thermal cracking of castings, avoids pores and defects in castings, and completely feeds to form high-density castings. It is suitable for the production of high-strength, air-tight, leak-proof castings and high-pressure parts, high precision and high density. , high-stability main components, high-quality scientific research and military supporting products, the prospect of popularization and application is very broad.
Description
Technical field: [0001] The invention relates to a sand casting process and equipment, which is especially suitable for the production of high-density and high-quality casting products. Background technique: [0002] In the existing casting process, the cost of ordinary sand casting is low. The production cycle is short, but the density (pinhole degree) and casting quality of the casting cannot be guaranteed, which cannot meet the supporting requirements of scientific research and military products; the die-casting process requires expensive steel molds, and the production cycle is long, and the pores of the casting cannot be guaranteed. Elimination; gypsum precision castings can basically meet the technical requirements of users. However, plaster-type precision casting requires expensive high-precision metal molds. The baking time of gypsum molding is as long as more than 50 hours, and the energy consumption is huge. Because the gypsum type does not have the function of ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more