PT-719 Pressure Sensor

July 24, 2020

The injection molding machine is also known as an injection molding machine or injection machine. It is the main molding equipment for making thermoplastic or thermosetting plastics into various shapes of plastic products using plastic molding dies. Divided into vertical, horizontal, and all-electric. The injection molding machine can heat the plastic and apply high pressure to the molten plastic to make it shoot out and fill the mold cavity. The principle of the injection molding machine is to use the thrust of the screw (or plunger) to quickly inject the plasticized plastic in the molten state (that is, the viscous flow state) into the closed mold cavity at high pressure, and obtain the product after solidification and shaping. crafting process. It undergoes mold clamping, injection, pressure holding, cooling and plasticization, mold opening, demoulding, etc.


Injection molding machine pressure sensor

The use of sensors on injection molding machines


The main parameters of OULD sensor

Range Range
Output signal 0-10 VDC, 4- 20mA selectable
Supply voltage 9-33VDC/td>
Overload pressure 2 double
Operating temperature -45℃-125℃
Temperature drift ±0.02%/℃
Comprehensive accuracy 0.5%FS
Respond time Within 1ms
Electrical connection M12*1 industrial plug, Hirschmann GDM3009
Process connection G1/4, R1/4 and other connection methods

Advantages of OULD sensor


Status and trends of injection molding machine industry

1. Global Market

From a global perspective, the growth rate of the injection molding machine market is relatively stable. The global injection molding machine market is expected to rise steadily from 8.482 billion euros in 2016 to 11.557 billion euros in 2024, with a compound annual growth rate of nearly 3.94%.

The output of plastic molding equipment in Germany, Austria, China, Japan, South Korea and Canada accounts for about 80% of the total global output. Manufacturing powerhouses such as Europe and Japan attach great importance to innovation in the field of plastic machinery. More than 45% of the global plastic machinery patents are owned by European companies, and more than half of the annual export value also comes from Europe. The precision injection molding machines and large injection molding machines produced in European countries represented by Germany have high technology content and high added value, with high profit margins, and almost monopolize the high-end market.

Electric injection molding machines produced in Japan have a market share of 30% in North America, and they have obvious advantages in rapid cycle molding and high-precision miniaturized injection molding. In 2013, the market size of my country's injection molding machine was 42,000 units, higher than 35,000 units in Japan, 3,500 units in the United States, and 2,800 units in Germany. From the perspective of production and sales, by 2017, China's injection molding machine production accounted for 49.9% of the world, with an output of about 90,000 units and a consumption of 66,000 units.

2. China Market

With the continued boom in a series of sectors such as real estate, home appliances, and automobiles, and benefiting from the impact of the recovery of downstream industries, the demand for plastic products has also grown steadily. Although Germany and Japan master high-end advanced large-scale and electric injection molding machines, domestic injection molding machine companies continue to strengthen their competitiveness and become a new growth driver for companies, struggling to catch up and occupy the global high-end market. From 2009 to 2017, the compound growth rate of my country's plastic products output was 6.8%. In 2017, the industry output reached 75.155 million tons, a year-on-year increase of 3.4%. The output of plastic products has maintained steady growth in recent years.

In recent years, my country's injection molding machine imports have continued to decline, with a compound volume growth rate of -4.08% from 2010 to 2017, and a compound growth rate of -3.21% in the value of imports. China's injection molding machine exports from 2010 to 2017 are currently growing, with a compound growth rate of 9.12% in export volume and a compound growth rate of 9.38% in export value. In 2010, China had a trade deficit of 1.993 billion yuan in injection molding machines, and a trade surplus of 2.851 billion yuan in 2017. , Basically showing a situation of increasing year by year, from a deficit to a surplus, it shows that China's injection molding machine products have core competitiveness and have been recognized by foreign customers.

Application and development of injection molding machine

It has been half a century since the initial injection molding machine was developed, and 80% of the engineering plastics industry currently uses injection molding. In recent years, due to the increasing needs of industries such as automobiles, construction, household appliances, food, medicine, etc., the development and improvement of injection molding technology have been promoted. At present, from the perspective of major producing countries such as the United States and Europe, the output of injection molding machines is increasing year by year, accounting for the largest proportion of plastic machinery.

1. Motorization of small machines, electro-hydraulic hybridization

At present, the entire small injection molding machine is developing towards electrification and electro-hydraulic hybridization. Electricity has the advantages of environmental protection and synthesis of precision parts. Electro-hydraulic hybridization is a combination of the advantages of electric and hydraulic. By adopting electro-hydraulic hybrid power, it has the technical advantages of high precision, speed, energy saving, environmental protection, reliability and durability. If electric pre-molding is adopted, the plasticization is driven by electric and the rest of the injection molding process is driven by hydraulic pressure. Electric and electro-hydraulic composite injection molding machines are popular models in the 3C industry, medical and other industries that require high working environment and precision. Two-board mainframe.

With the rapid development of my country's national municipal engineering, rail transit and other fields, such as aircraft, high-speed rail, high-speed trains and other strategic needs, the demand for large two-plate injection molding machines for large plastic parts is increasing. The two-platen machine has the advantages of saving space and improving efficiency, and is currently becoming the main development direction of large injection molding machines.

2. Investment needs of downstream industries

The output of the plastic products industry has grown steadily, and the per capita plastic consumption is still lower than that of developed countries. From the perspective of the output of plastic products, its output has maintained a steady growth. From 2009 to 2016, the compound growth rate of China's plastic product output was 4.8%. In 2016, the industry output reached 77.17 million tons. From 2017 to 2018, China's plastic product products experienced a sharp decline. In 2019, domestic plastic product output resumed growth, reaching 81,841,700 tons, a significant year-on-year increase of 35.5%. This is mainly due to the shift of China's waste plastic imports from Europe and the United States to Southeast Asia and waste plastics The increase in recycling is related.

The downstream application industries of injection molding machines include building materials, automobiles, home appliances, packaging, 3C industries, toys and other industries, which basically cover the entire downstream manufacturing industry and are closely related to the overall macroeconomic operation. The main applications of injection molding machines in China are in four major industries: general plastics, automobiles, home appliances and packaging beverages. More than 90% of injection molding machines are used in these four major industries. According to the "China Plastic Machinery Industry Yearbook", general plastics accounted for 28%, automobiles accounted for 26%, household appliances accounted for 25%, and packaging accounted for 12%. According to the report of Interconnection Consulting Company, there is no big difference in the downstream applications of injection molding machines at home and abroad. The downstream injection molding machines in the world are 25%-30% for automobiles, 20%-25% for household appliances, and 12%-16% for packaging.

From the perspective of downstream industry output, new energy vehicles have grown rapidly since May 2017, mainly due to favorable policies such as the reduction of down payment ratios for new energy vehicles and second-hand vehicles in the “Auto Loan Management Measures”. At the same time, the two sessions in 2018 Proposing the development of new consumption business models and new models, extending the new energy vehicle purchase tax preferential policy for another three years, and completely abolishing the policy of restricted relocation of used vehicles. The output of new energy vehicles is expected to continue to maintain rapid growth; in the home appliance industry, household air conditioners and refrigerators Out of the trough of negative growth in 2015, it has continued to maintain a double-digit growth since February 2017; the year-on-year growth of special packaging machinery has slowed down; and the precision and light weight of the 3C industry is the overall development trend.

Relevant regulations and promotion policies of the injection molding machine industry

Industry authorities and regulatory system

My country's supervision of the plastic machinery industry mainly includes:

1. The National Development and Reform Commission and the Ministry of Industry and Information Technology have macro-control of the industry, including the formulation of industrial policies, industry regulations, and technical standards.

2. The State Administration of Quality Supervision, Inspection and Quarantine supervises and manages industry product quality and production licenses.

3. Industry self-discipline management of China Plastics Machinery Industry Association. In addition, the industry access of foreign-invested enterprises is managed by the commercial department.

Main industry regulations

Laws and regulations and related policies Release time Issued Related content and influence
"Industrial Transformation and Upgrading Investment Guide" 2011 Ministry of Industry and Information Technology Article 503: Energy-saving plastic processing and molding equipment. The development and industrialization of energy-saving plastic injection equipment, high-speed energy-saving plastic extrusion equipment and high-speed energy-saving plastic extrusion and blowing equipment, encourage the use of low-temperature and low-pressure injection molding and extrusion processing and molding technologies, servo drive technology, intelligent control technology, etc. Technical means to help reduce processing energy consumption.
"Guide to Priority Development of High-Tech Industrialization Key Fields" 2011 National Development and Reform Commission, Ministry of Science and Technology, Ministry of Commerce, State Intellectual Property Office "Seven. Advanced manufacturing 98, precision and high efficiency and forming equipment" clearly encourages the development of "high-precision plastic processing and forming equipment."
"Twelfth Five-Year" Development Plan for China's Plastic Machinery Industry 2011 China Plastics Industry Association The "Twelfth Five-Year" development plan of China's plastics machinery industry will list six major areas, including precision casting equipment and energy-saving plastic molding processing equipment, as development priorities.
"Guiding Catalogue for Independent Innovation of Major Technical Equipment" (2012 Edition) 2012 Ministry of Industry and Information Technology, Ministry of Science and Technology, Ministry of Finance, State-owned Assets Supervision and Administration Commission Include "All-electric Intelligent Plastic Injection Molding Machine (Mini)" and "Large Super Large Injection Volume Plastic Injection Molding Machine" in the catalog.
"The 12th Five-Year Plan for Industrial Energy Conservation" 2012 Ministry of Industry and Information Technology Plastic processing: Carry out energy-saving technology research and development for key plastic processing equipment such as injection machines, extruders, auxiliary equipment, and promote technologies such as fully closed-loop servo drives, dynamic molding processing, and the comprehensive utilization of electromagnetic induction heating old plastics to improve the energy efficiency of the plastics processing industry.

When my country's injection molding machine products enter overseas markets, they must also meet the market access standards of relevant countries and regions on product efficiency, energy consumption, environmental protection, and other aspects, and accept the constraints of relevant national and regional policies and laws.

Analysis of opportunities for the future development of the industry

During the "Tenth Five-Year Plan" period, with the development of petrochemical products and the increase of plastic products, plastic machinery has reached the "golden" era. After 5-10 years, plastic machinery is still a sunrise industry. There are domestic predictions that the material field in the 21st century is the world of plastics, and China is the largest market for the plastics industry (including the plastic machinery industry) in the 21st century.

At present, the annual output value of China's plastic machinery industry is about 10 billion yuan, and the domestic market demand is about 20 billion yuan, there is still a lot of room. In addition, it is now recognized that the per capita consumption of plastics in a country or region and the position of the plastics industry in the national economy are one of the important signs that reflect industrial development and progress. China is rich in plastic resources. At the beginning of the 21st century, the annual output of major synthetic resins reached 42 million tons. It is a veritable plastic power and ranks fourth in the world. It is predicted that from now on to the "Eleventh Five-Year Plan" period, China's synthetic resin output will increase at a rate of 5%-10%, and China is again a big consumer of plastics. According to statistics, its annual consumption accounts for the second place in the world, second only to the United States, while China’s per capita consumption is only 19kg, ranking 32nd in the world, 11%-20% of industrialized countries. Big development, the prospect of plastic machinery is broad, it follows the needs of plastic products and develops.

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