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Research and development of particular injection molding machine for thermosetting materials

Project basis for particular injection molding machine for thermosetting materials 

1) Current status, level, and development trends at home and abroad:  With the increasing development of science and technology, people’s requirements for the precision of plastic parts are getting higher and higher. Manufacturers began to develop special injection molding machines for thermosetting materials. The molding methods of thermosetting plastic products are compression molding and injection molding.

Therefore, most thermosetting plastics are also divided into pressed materials and injection materials. Generally, the cost of pressing is low, but the labor intensity of the workers is high, the precision of the product is low, and the yield of the finished product is not high. Compared with press molding, injection molding has a high one-time investment cost. Still, the labor intensity of workers is low, the product precision is high, and the yield is high, so it has a tendency to replace press molding gradually. 

2) The purpose and significance of the particular injection molding machine for thermosetting materials:

Thermosetting plastic is also called bakelite or bakelite. It refers to the chemical change of the resin during the processing, and the molecular structure changes from the linear structure before processing to the net-like structure. A type of polymer that cannot be softened by heating once it has been formed. Bakelite has many differences in performance from thermoplastics. In addition to being recycled, it has the advantages of high strength, good creep resistance, high heat resistance temperature, high processing dimensional accuracy, and good arc resistance.

A thermosetting plastic injection molding machine is also known as a Bakelite machine or a Bakelite machine. It uses a screw to reduce the viscosity of the heated barrel of the raw material and then inject it into a heated mold. Once the material is filled with the mold, the pressure is maintained. At this time, chemical cross-linking occurs, and the polymer becomes hard. The complex (i.e., cured) product can be ejected from the mold while it is hot to complete the production.

The particular injection molding machine for thermosetting materials uses injection molding instead of compression molding to change significantly the product molding cycle, product variation, product molding volume, and labor cost, which increases the product molding volume per unit time, thereby reducing costs and increasing Enterprise Competitiveness. 

3) Current level and market prospects:  

Fast molding cycle and production process automation; more minor product changes; lower labor costs; high production capacity. The particular injection molding machine for thermosetting materials satisfies manufacturers’ demands and provides manufacturers with a broader development space.

Development main content, goals, and technical key  

1) Development of primary content and goals:  

a. Background technology:  

The thermosetting material, a particular injection molding machine, is based on the traditional injection molding machine. It includes the unique injection system, mold clamping system, electrical control system, lubrication system, heating and cooling system, safety monitoring system, and other injection molding machine components. Precise raw material heating control, mold cavity temperature control, injection pressure, mold clamping force, and other design concepts. Realize a brand-new injection molding process concept with a brand-new electro-hydraulic control, detection, and execution mode. 

b. New content:  

The thermosetting material’s molding equipment, particularly the injection molding machine disclosed by the utility model, has a hydraulic drive clamping device that closes the mold and an injection device that can transport the material. It uses a special screw to reduce the viscosity of the heated barrel of the raw material, Injected into the heated mold. Once the material is full of mold, it will be kept under pressure. Through the particular exhaust function and mold clamping action, the material will harden in the mold cavity.

The cured product can be ejected from the mold while it is hot. The utility model adopts both barrel mold temperature machine heating and mold temperature controller heating to ensure temperature accuracy. The high-efficiency and precise servo power control system improves the injection molding performance. Smooth power. The clamping system has undergone finite element analysis. The template has low deformation. The connecting rod is designed with a large angle, and its fulcrum is close to the center.

The clamping force is transmitted to the center of the template to achieve uniform distribution of the clamping and maintain the accuracy of the mold. A computer professionally controls the injection molding machine. The whole machine adopts complete digital control to realize intelligent control of the whole machine.

2) Key technologies and innovations:  

a. Add iron plates and heat insulation panels to the movable and fixed templates to prevent the mold temperature from being transmitted to other parts of the machine, affecting the machine’s performance, and reducing heat loss to ensure the molding temperature. 

b. Straight-through nozzles and special control procedures are used to ensure that the pressure-holding stage is not blocked by solidification. 

c. The cylinder heating adopts a constant temperature medium heating system. 

d. The mold clamping device has an exhaust function to ensure the processing technology. 

e. Professional plastic injection barrel and special screw length-diameter ratio to ensure product quality.

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