Mold industry and its development
trend
Die
& Mould Industry Status
Due
to historical reasons for the formation of closed, "big and complete"
enterprise features, most enterprises in China are equipped with mold workshop,
in factory matching status since the late 70s have a mold the concept of
industrialization and specialization of production. Production efficiency is not high, poor
economic returns. Mold production industry
is small and scattered, cross-industry, capital-intensive, professional,
comme cnc milling machinercial and technical management level are relatively low.
According to incomplete statistics, there are now specialized in
manufacturing mold, the product supporting mold factory workshop (factory) near
17 000, about 600 000 employees, annual output value reached 20 billion yuan
mold. However, the existing capacity of
the mold and die industry can only meet the demand of 60%, still can not meet
the needs of national economic development.
At present, the domestic needs of large, sophisticated, complex and long
life of the mold also rely mainly on imports.
According to customs statistics, in 1997 630 million U.S. dollars worth
of imports mold, not including the import of mold together with the equipment;
in 1997 only 78 million U.S. dollars export mold. At present the technological level of China
Die & Mould Industry and manufacturing capacity, China's national economy
in the weak links and bottlenecks constraining sustainable economic development。
Research on the Structure of industrial
products mold
In
accordance with the division of China Mould Industry Association, China mold is
divided into 10 basic categories, which, stamping die and plastic molding two
categories accounted for the main part. cnc milling machine Calculated by output, present, China accounts for about 50% die
stamping, plastic molding die about 20%, Wire Drawing Die (Tool) about 10%of
the world's advanced industrial countries and regions, the proportion of
plastic forming die die general of the total output value 40%.
Most of our stamping die mold for the simple, single-process mode and
meet the molds, precision die, precision multi-position progressive die is also
one of the few, die less than 100 million times the average life of the mold
reached 100 million times the maximum life of more than accuracy 3 ~ 5um, more
than 50 progressive station, and the international life of the die 600 million
times the highest average life of the die 50 million times compared to the mid
80s at the international advanced level。
China's plastic molding mold design,
production technology started relatively late, the overall level of low. Currently a single cavity, a simple mold
cavity 70%, and still dominant. A sophisticated multi-cavity mold plastic
injection mold, plastic injection mold has been able to multi-color preliminary
design and manufacturing. Mould is about
80 million times the average life span is about, the main difference is the
large deformation of mold components, excess burr side of a large, poor surface
quality, erosion and corrosion serious mold cavity, the mold cavity exhaust
poor and vulnerable such as, cnc milling machine injection mold 5um accuracy has reached below the
highest life expectancy has exceeded 20 million times, the number has more than
100 chamber cavity, reaching the mid 80s to early 90s the international
advanced level.
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