This paper discusses the general situation of mold and mold industry, the present situation and development trend of mold industry in China, and points out the mold in China.

There is a gap between technology and foreign countries, and the domestic and foreign mold markets are analyzed.

Key words: mold manufacturing technology; Development; Mould industry

1 Introduction

Mould is the main work widely used in industrial production today.

Art equipment is the most important means of industrial production and the development direction of technology.

The industrial level of a country depends largely on molds.

The development level of industry and mold industry is a national industry.

One of the important symbols of the industry level. Mold industry is called "gold industry".

Five pillar industries of the national economy: machinery, electronics, automobiles and stone.

Culture and architecture require the development of mold industry to adapt to it. Maulde is.

"Benefit amplifier", the final product value produced by the mold, is often

The value of the mold itself is dozens or hundreds of times, and the production level of the mold is high.

Low, has become an important standard to measure a country's manufacturing level.

Chi, also largely determines the product quality, efficiency and new output.

Product development capacity, therefore, the revitalization and development of China's mold industry, Japanese.

Benefit has aroused people's attention and attention.

2 Overview of Mould and Mould Industry

Mould is a special tool for molding various metals or plastics.

Non-metallic materials required parts molding products, this special tool system.

Weighing mould.

Mould is the most basic equipment in industrial production, which is to realize less cutting.

It is an indispensable non-cutting tool and widely used in industrial production.

Various fields, such as automobiles, motorcycles, household appliances, instruments, meters, electric power.

Sub-grade, in which 60% ~ 80% parts need to be manufactured by molds.

Made; Efficient mass production of plastic parts, screws, nuts and washers.

Quasi-parts also need molds to produce; Engineering plastics, powder metallurgy, rubber,

Alloy die casting, glass forming, etc. It needs to be molded with a mold.

2. 1 Current situation of mold industry in China

It has been more than half a year since the mold industry in China started to develop rapidly.

In recent years, China's mold technology has made great progress in 2 1 century.

And improve; Large-scale, precise, complex, efficient and long-life molds are on the scene again.

At a new level, the quality and service life of the mould are obviously improved, and the delivery time of the mould is also improved.

Greatly shortened. Mold CAD/CAE/CAM technology has been widely used.

The software of mould CAD/CAE/CAM with independent copyright has been developed.

Pieces. Electrical machining and numerical control machining have played an important role in the development of mold manufacturing technology.

Important role.

2.2 Development trend of China mold industry

At present, China's industrial production is characterized by diversification and renewal of products.

Rapid and fierce market competition, in this case, users are interested in mold manufacturing.

The requirements are short loan delivery cycle, high accuracy, good quality and low price.

The development of mould technology should meet these requirements.

Modern mold manufacturing technology is marked by the application of two major technologies.

Yes, one is CNC machining technology, and the other is computer application technology.

(1) CNC machining technology includes: CNC machining technology.

Electrical machining technology and numerical control special machining technology.

NC machining technology: NC turning technology in mold manufacturing.

Technology, CNC milling technology, these technologies are developing in the direction of high-speed cutting.

To develop.

CNC EDM technology: such as CNC EDM technology, CNC

Wire cutting technology.

Numerical control special processing technology: usually use light energy, sound energy and ultrasonic wave.

Wave to complete processing, such as rapid prototyping manufacturing technology. , they are

Modern mold manufacturing provides new technical methods and processing approaches.

(2) Computer technology.

CAD/CAM technology: used for modeling and providing NC for NC machining.

Program.

CAE technology: mainly for different mold types, so as to correspond.

Based on the basic theory, the product forming can be predicted by numerical simulation.

The purpose of this process is to improve the mold design.

Simulation technology: mainly testing the NC program of mold NC machining,

Reduce the errors in the actual machining process.

Network technology: realize synchronous communication in different places through LAN and WAN.

Letter, the purpose of solving problems in time.

2.3 China mold technology gap with foreign countries.

Although the mold industry in China has made great progress in the past 10 years.

The development is remarkable, but there are still many aspects compared with industrialized countries.

There is a big gap. For example, precision machining equipment accounts for a large proportion in mold processing equipment.

Low specific gravity; The popularization of CAD/CAE/CAM technology is not high; many

Advanced mold technology has not been widely used and so on, resulting in a considerable part.

Large, precise, complex and long-life molds depend on imports.

(1) contradiction between production and demand.

With the continuous improvement of industrial development level, the upgrading speed of industrial products is accelerated.

Fast, the demand for molds is getting higher and higher, although since the reform and opening up, molds

Industry has made great progress, but in quantity and quality

The world still can't meet the demand of the domestic market, and the current satisfaction rate can only be reached.

About 70%, which leads to the contradiction between production and demand: first, specialization and standardization.

The degree of standardization is low, except for a small number of standard parts, most of the work needs to be shaped.

With the completion of the factory and the restriction of the management system of processing enterprises, the mold system has been produced.

Long manufacturing cycle, unable to meet market demand; Second, the gap between design and technology.

After that, if the popularity of mold CAD/CAM technology is not high, the processing equipment will be numerically controlled.

The low degree of chemical conversion also leads to the low production efficiency and long cycle of the mold.

(2) product level.

To measure the level of mold products, there are mainly manufacturing accuracy of mold processing.

Degree and surface roughness, the complexity of processing mold, the use of mold

Life and manufacturing cycle, etc. The level of mould products at home and abroad is still very poor.

See table 1, table 2 and table 3 for the distance.

(3) technical equipment level.

China's machine tool industry has been able to provide high-precision complete sets of equipment.

Mold processing equipment, such as machining center, CNC milling machine and CNC copying milling machine.

Machine bed, EDM machine tool, coordinate grinder, optical curve grinder, coordinate measuring machine.

Wait a minute. However, machining positioning accuracy, machining surface roughness, machine tool rigidity

Sex, stability, reliability, matching of tool parts, and porcelain.

Compared with foreign countries, the gap is still very large.

3 Development trend of mold technology in China

At present, China's industrial production is characterized by product diversification.

The new rapid and fierce market competition, in this case, users are interested in mold manufacturing.

The requirements of manufacturing industry are short delivery time, high precision, good quality and low price. Therefore,

The development trend of mold industry is very obvious.

3. 1 large precision mould products

More and more large-scale molding (molding) parts of mold products, as well as due to

Efficient production requires multiple cavities in one mold (for example, the plastic packaging mold has reached several cavities in one mold).

One hundred cavities), making the mold bigger and bigger.

With the miniaturization of parts and the development of die structure (such as multiplexing)

With the increase of the number of progressive die bits, the stepping accuracy is improved), precision die

The accuracy is improved from 5μm to 2 ~ 3 μ m, and some modules will be used in the future.

The tolerance of machining accuracy is required to be below 65438 0 μ m, which requires the development of ultra-precision.

I'm sorting it out.

3.2 Multifunctional Composite Mould

The new multifunctional compound die is based on the multi-station progressive die.

A multifunctional die was developed. Except for stamping parts,

It can also undertake assembly tasks such as indexing, laminating, tapping, riveting and locking.

Too many multi-functional molds no longer produce individual parts, but batches.

Components of.

3.3 New Hot Runner Mold

Due to the application of hot runner technology in plastic mold, the mold manufacturing level has been improved.

The production efficiency and quality are improved, and the production raw materials can be greatly saved.

And the wide application of this technology is a major part of plastic molds.

Change, half of foreign molds have adopted hot runner technology, and there are some enterprises.

The industry has even reached more than 80%, and the effect is very obvious.

3.4 Gas-assisted injection mold and high-pressure injection molding process mold

Gas-assisted injection molding is a new plastic molding process.

It has the advantages of low injection pressure, small warping deformation of products, good surface and easy processing.

Type, wall thickness difference, etc. Under the premise of ensuring product quality.

, greatly reducing the cost.

3.5 rapid and economical mold

At present, the proportion of rapid and economical molds in production will reach 75%.

In fact, on the one hand, the product has a short service life and a fast variety update; on the other hand,

The pattern of products changes frequently, which requires the production cycle of molds to be faster and faster.

All right. Therefore, people pay more and more attention to developing fast and economical molds.

3.6 High-speed milling

The high-speed milling developed abroad in recent years can achieve the spindle speed.

When it reaches 40000 ~ 100000 rpm, the fast feed speed can reach 30 ~.

40m/min, the tool changing time can be increased to 1 ~ 3s, thus greatly improving.

In order to improve the processing efficiency, for example, when processing die-casting dies, it can be improved by 7-8 times, and it can

The machined surface roughness of Ra≤ 10μm is obtained, and the shape accuracy can reach.

10 micron. In addition, modules with hardness as high as 60HRC can be processed to form.

The challenge to EDM. Therefore, high-speed milling technology

The development of mould processing, especially automobile and household appliances, has been promoted.

The manufacturing of large cavity molds in the industry has injected new vitality.

4 mold market analysis

Judging from the overall trend of mold market development, it should be stable.

In fact, experts at home and abroad say that the modern mold industry is an industry that will never die.

Although the overall trend of the mold market is stable and upward, the table of various molds

It is impossible to be consistent now, and the sum of stamping die, plastic die and die casting die is average.

In the future mold market, plastics will account for about 80% of the total mold.

The development speed of dies and die-casting dies will be higher than that of stamping dies, and it will be in the total number of dies.

The proportion will gradually increase.

Mold demand is based on the output of main engine and its technical development.

Predict, the development speed of mold demand is higher than that of main engine.

Ordinary. The mould market of domestic automobile and motorcycle industry is mould.

The biggest market,

4. 1 household appliances industry

A single refrigerator needs about 150 parts produced by molds, and * * * needs.

There are about 350 pairs of dies, worth more than 4 million yuan, including stamping dies and plastics.

The ratio of modules is 2: 1. The parts that a washing machine needs to produce with molds are probably

More than 500, * * * need 200 pairs of molds, worth about 20 million yuan to 3.

0 million yuan, of which the ratio of punching die to plastic die is 1: 2 ~ 1: 3. Single station no-load

The regulator needs nearly 20 plastic molds, worth about 1.5 million yuan.

A single microwave oven needs nearly 100 molds, which is worth about 2 million yuan.

4.2 Electronic and Communication Products

In electronic products, audio-visual products are the main market for molds, among which

Mainly color TV, a single color TV has about 150 parts to use.

Mold production, * * * needs about 140 pairs of molds, worth about 7 million yuan, of which

There are about 10 pairs of plastic molds, with a value of about10.2 million yuan.

4.3 Building materials industry

With the development of the construction industry, the demand for building materials will increase greatly.

The demand for long plastic profiles and aluminum alloy profiles will increase day by day.

The growth rate of plastic profile mould will be higher than the overall development level of mould industry.

4.4 Plastic products

By 2005, China's plastic products will reach180,000 tons, of which engineering

Plastics is a key industry supported and given priority to in China, and the current satisfaction rate is

Only 36.2%, it is expected to have an annual growth rate of 25%.

4.5 Analysis of International Mould Market

At present, the world mold market is in short supply. In recent years, the world mold

The total market has reached 60-65 billion US dollars, the United States, Japan, France and

The molds exported by Switzerland and other countries account for about 1/ of the total mold output value of the country.

3。 There are few die exports in China, although die standard parts have begun to smell good.

Hong Kong and Southeast Asia, but the quantity is not much, 1998 die out.

The total export value is about 96 million US dollars, accounting for about 1% of the total die output value in China.

3.6%, a big gap compared with other advanced countries. China mold assembler

High technical level, low labor cost, as long as equipped with some advanced figures.

Control mold equipment, improve mold processing quality, shorten production cycle and communication.

Foreign trade channels and mold exports will be greatly developed.

With the rapid development of economy, the proportion of middle and high-grade molds will continue.

Increase, which is also the market trend brought about by product structure adjustment.

To sum up, in the next few decades, the demand of domestic and international mold market is very large.

Wang's prospects are very good.

5 references

[1] ginger. Mold NC machining technology [M]. Beijing: Electronic Industry Press, 2005.

Li fazhi Advanced mould manufacturing technology [M]. Beijing: Machinery Industry Press, 2003.

Kong Deyin. Mold manufacturing [M]. Beijing: Machinery Industry Press, 1998.

Ginger. Nc machining technology and training [M]. Beijing: Electronic Industry Press,

2003