Innovation Of Injection Molding Technology In Shoemaking Field

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A special aspect of shoemaking is that different machines are used in different steps of manufacturing process, and the machines also depend on the structural complexity of shoes, the quality of products and their manufacturing materials. The coverage includes simple table equipment, relatively compact equipment such as shaving machines and sewing machines, rocker cutting machines and other types of cutting machines, and more heavy equipment, and finally to the most complicated machine, such as the CNC (NC) die free cutting system, and the electronic servo bandage machine.

In this series of shoe making machines that need to be purchased, no matter complexity or investment scale, the injection molding system is more important.

From the point of view of technical complexity, even the simplest dual workstation injection system can catch up with all other shoe making equipment. When we think of a large scale high output rotary injection molding machine with rotating and clamping devices equipped with 30 or more workstations, we know that they represent the top of the complexity of the development of shoemaking machine series.

To this end, it is not surprising that companies that develop and produce such series of machines must focus on this particular technology field and invest heavily in R & D activities to achieve and maintain global technology and market leadership.

If we know that the production injection molding equipment requires proprietary technology with many different capabilities, this situation will be better understood. These know-how are: mechanical, electronic and software technology, and material science, which are used to design the machine itself, to manufacture the mold (because the mold is an important element of the whole solution), and only because all the processes are carried out around the finished product (outsole or the whole pair of shoes / boots) from the particle or liquid compound "molding".

In 1980s, Main Group set up the injection molding technology standard for the footwear industry.

For example, the company has achieved the following technological achievements in its long history: a static injection machine equipped with two or more workstations, with simple management and high production efficiency; the injection molding system used for the shoe / shoe rotary clamping device is equipped with a mold clamping device, which is characterized by fast coupling and opening of the convex template; the EVA injection system is considered to be a better substitute for the traditional hot forming rubber injection gating system, and polyurethane and TPU+PU are injected into the opening / closing operation of the same machine during the integration cycle.

All of these have shown the success story of Main Group based on the more than 16000 global customers' machines. In many cases, these machines have been running for many years, but they still get the technical support and spare parts distribution of Main Group.

At the end of 2009, Main Group launched an important reorganization, which was acquired by Atom Group, a world-renowned cutting system enterprise, and set up a new company called Main Group Technologies.

The new company has launched a new wave of technology development and pformation. In recent three years, the company has made an important pformation of its best sales model and developed a brand-new machine.

The most relevant aspects of these new developments will be highlighted below.

The first relevant aspect of these technological developments is to focus on all aspects of process automation. Focusing on injection molding operations, especially robots, is regarded as an important contribution to machine efficiency (see the June 2012 "injection molding system - materials, molds and equipment", Yi Wen).

The technical attention and sensitivity of Main Group have been oriented towards optimizing the whole production cycle: effective working procedures must also include durable and reliable machines.

In accordance with this direction, the company continues to develop and research and develop solutions to achieve higher productivity and cost savings.

In this particular social and economic stage of vigorous manufacturing activity, production technology has never been so important to satisfy customer needs, such as reducing costs (controlling the cost of finished products) and improving the quality of the product itself.

Automation also means saving labor, especially in western countries (and for other countries). Labor costs will have a huge impact on the finished products.

In particular, traditional footwear and safety boots and work boots require rough and / or gluing processes. Automation is particularly important in this respect.

Similar applications and processing also include the finishing process of products such as boots.

The other form of automation is the so-called small automation, which is no less important than the cost reduction.

The injection molding machine can not be regarded as an end point of its own, but should be considered as an integral part of the equipment in the entire production process. Therefore, even if the automation system is deployed on a small scale, it can make a great contribution to the overall efficiency of the process.

Many small but important jobs that the operator uses manually with new technology can also be completed by automatic equipment, which greatly reduces the manpower used.

Here we refer to robot manipulators, robots ejecting silicone release agents, robot manipulators for controlling grinding heads, and robots for loading steel midsole during the automatic period.

However, it is necessary to use an intelligent device that can achieve the efficiency of the entire equipment to manage all these automatic components and equipment applied to injection molding machines.

For this reason, Main Group has developed the entire new series of software tools to optimize functions while allowing for the convenience of diagnosing the real problems that may arise throughout the daily production.

In particular, management system software detects and monitors all the causes of failure or downtime during the normal working period (for example, the later work report can determine how many minutes the machine has actually produced and how many minutes it wastes and classify it according to type). Therefore, simple and quick intervention will not cause delay.

Material processing innovation is another important part of Main Group's market strategy.

In addition to the precise control of the complexity of its die casting and the need to carefully monitor the whole process, EVA is obviously a very attractive material for all kinds of materials used in the production of outsole or all rubber and plastic footwear or boots.

The new E266 EVALUTION machine for two-color EVA represents an important step towards this field.

These new machines integrate all the experience and know-how that Main Group has accumulated in EVA injection, especially in two-color EVA production.

The machines include 2, 4, 6 or 8 workstations. All models can handle two colors or two different EVA density composite materials: the versatile level is high, which ensures excellent comfort / stability ratio, velvet / rubber feeling, small density, light material, and excellent thermal / cold insulation performance.

In addition, due to the longer gate of the hot runner mold, no scrap is a factor that must be considered in the production of EVA, thus achieving higher productivity and material and cost savings.

Because of the innovative design, the mold cleaning in E266 EVALUTION machine is extremely simple and fast.

The operator can work more easily in the best condition, so as to greatly reduce the time required for the cleaning mould, thus greatly increasing the output.

After careful evaluation, it is identified that 4 injection heads can be used as the best solution. Therefore, more pigment is more flexible during the typical production cycle of EVA shoes, sandals, rubber overshoes and boots.

The entire design of the machine has been adopted for the purpose of major energy saving.

Solution.

This is another leading aspect of all new machines in Main Group; sustainability and lean production are becoming more and more important for end users.

Machines must be "energy sensitive" in all aspects, especially for devices that we consider to be complex, such as injection molding systems.

Main Group then gradually integrated a technology in all its products. This technology is similar to that of start and stop, which is familiar to us in cars. In short, it cuts off all main power sources when it is not needed, and then reactivates it when needed.

This design concept affects several components of the machine; for E266, the typical example is the closing stage.

The mechanism can greatly increase the speed of movement, thus greatly reducing the time, increasing the oil flow rate for achieving the quality and productivity of all final products, and saving energy.

In general, in E266 EVALUTION, the design solution will be designed.

It is suitable for the entire hydraulic system and hydraulic unit, so the energy dissipation is very low, and no refrigeration unit is needed, thus saving energy.

PU, TPU or rubber combination is directly linked to shoe upper injection molding as a pair of shoes / boots, which is another important technology in shoemaking, especially for military boots and safety boots, and also for casual shoes.

Main Group's machine in this market area is PRAGMA machine, which is based on combined injection - casting technology INCOM process. This kind of technology has excellent aesthetic effect, good abrasion resistance and durable service. Because of its lightweight material, it is comfortable to wear, low thickness material can guarantee high cost performance, so the cost control is better.

The manufacture of these machines ensures that the design and optimization of pneumatic and hydraulic systems, electronic control and all mechanical components can be ensured.

The highest level.