Shortening the product development cycle is one of the effective means to win the market competition. Compared with the traditional mold processing technology, the rapid economic mold making technology has the characteristics of short mold making cycle and low cost, and the precision and service life can meet the production demand. It is a mold manufacturing technology with significant comprehensive economic benefits. Specifically, it mainly includes the following technologies.
(1) Rapid prototyping manufacturing technology (RPM). It includes laser stereo lithography (SLA); Laminated profile manufacturing technology (LOM); Laser powder selective sintering (SLS); Melt deposition forming technology (FDM) and three-dimensional printing forming technology (3d-p).
(2) Surface forming and die making technology of Guangdong machining plant. It refers to a process technology to form cavity surface and fine pattern by using new process methods such as spraying, electroforming and chemical corrosion.
(3) Casting molding technology. It mainly includes bismuth tin alloy die making technology, zinc base alloy die making technology, resin composite forming die technology and silicone rubber die making technology.
(4) Cold extrusion and superplastic forming die making technology.
(5) Dieless multi-point forming technology.
(6) Kevron steel strip blanking and die making technology.
(7) Rapid manufacturing technology of die blank. It mainly includes dry sand full mold casting, negative pressure full mold casting, resin sand full mold casting and wax loss precision casting.
(8) Other technical aspects. For example, nitrogen spring blank holder, unloading, rapid die change technology, stamping unit combination technology, edge surfacing technology and full mold casting die edge insert technology are adopted.
Die materials and surface treatment technology are developing rapidly
The material application is the key for the mold industry of Guangdong machining plant to reach a higher level. Due to improper material selection and use, the die fails prematurely, accounting for more than 45% of the failed die. In terms of die materials, common cold working die steels include CrWMn, Cr12, Cr12MoV and W6Mo5Cr4V2, flame quenched steels (such as aux2, sx105v (7CrSiMnMoV) in Japan, etc; Common new hot work die steels include American H13, Swedish qro80m, qro90supreme, etc; Common plastic mold steels include pre hardening steel (such as American P20), age hardening section steel (such as American p21, Japan nak55, etc.), heat treatment hardening section steel (such as American D2, Japan pd613, pd555, Sweden yishengbai 136, etc.), powder mold steel (such as Japan kad18 and kas440), etc; HT300, QT60-2, Mo Cr, mo-v cast iron, etc. are commonly used for panel drawing die, and HT250 is used for large die base. Steel bonded cemented carbide and cemented carbide YG20 are often used in multi station precision stamping dies. In the aspect of die surface treatment, the main trend is: from infiltration of single element to multi-element co infiltration and composite infiltration (such as TD method); From general diffusion to CVD, PVD, PCVD, ion infiltration and ion implantation; Available coatings include tic, tin, TiCN, TiAlN, CrN, Cr7C3, W2C, etc. at the same time, the means of heat treatment has developed from atmospheric heat treatment to vacuum heat treatment. In addition, more and more attention has been paid to laser strengthening, glow ion nitriding technology and electroplating (brush plating) anti-corrosion strengthening technology. The new process, new concept and new model of die and mould industry have been gradually recognized
In terms of forming process, Guangdong machining plant mainly includes stamping die function compounding, superplastic forming, plastic precision forming technology, plastic mold gas assisted injection technology, hot runner technology, high-pressure injection molding technology, etc. On the other hand, with the continuous development of advanced manufacturing technology and the improvement of the overall level of the mold industry, some new design, production and management concepts and modes have emerged in the mold industry. Machining mainly includes: flexible manufacturing technology to adapt to the characteristics of single die production; Create the best management and efficiency team spirit, lean production; New production philosophies such as concurrent engineering, virtual manufacturing, global agile manufacturing and network manufacturing to improve rapid response ability; Widely adopt the division of labor and cooperative production mode of standard parts and general parts; Green design and manufacturing to meet the requirements of sustainable development and environmental protection