Color-mixing injection molding machine

The existing general injection molding machines can only produce single-color or one-color products. To enrich the surface patterns and textures of plastic parts, a secondary surface treatment is applied after injection molding, which includes surface painting and electroplating to enhance the product's aesthetics. Through years of research and development, Tongshihai has developed a new injection molding process that eliminates the need for painting and electroplating, allowing for direct injection through a color-mixing injection molding machine. This process achieves a multicolored mixed surface effect on the plastic. Color-mixing injection molding involves injecting two different colored plastic materials into the mold cavity without vigorous stirring (or becoming one color). The key technical aspect is to display two, three, or more colors on the surface of the part, with control over the thickness and size of the mixed patterns. The products produced using this color-mixing injection molding process have gained widespread customer recognition and will be widely applied to more injection molded parts in the future.

Specs: HYH70, HYH90, HYH130, HYH170, HYH230, HYspan50, HYspan80, HYH480, HYH650, HYH780, HYH850, HYH900, HYH1300

Injection molding machines, also known as molding machines or presses, are the primary equipment used to produce various shaped plastic products by utilizing plastic molding molds to shape thermoplastic or thermosetting plastics. They are categorized into vertical, horizontal, and all-electric types. Injection molding machines can heat plastics, apply high pressure to the molten plastic, and force it to be extruded and fill the mold cavity.

Injection molding machines, also known as molding machines or presses, are often referred to as "啤机" (píjī) in many factories, and the products they produce are called "啤件." They are the primary molding equipment used to manufacture various shaped plastic products by utilizing plastic molding molds to shape thermoplastic or thermosetting materials. Injection molding machines can be classified into vertical, horizontal, and vertical-horizontal composite types based on the arrangement of their clamping units and mold fixtures.

Industry Development Status

Injection molding robots are automated production equipment that can mimic some functions of the human upper limbs, enabling automatic control to deliver products or handle tools for production operations according to predetermined requirements. Chinese plastic processing factories in the coastal areas of South and East China have shown increasing interest in robots, but their penetration rate in the domestic plastic machinery industry is less than 10%. Robots can ensure consistent cycle times, improve quality, and enhance safety. With the rapid development of the plastic processing industry in China, the degree of automation in injection molding equipment is also increasing. Modern injection molding machines often come with robots to enhance production efficiency. The number of exported and imported injection molding machines in China is roughly equal, around 15,000 units each. However, the import value is $9.2 billion, while the export value is $3.5 billion. Precision injection molding machines are mainly overseas, as are equipment such as bi-axially oriented PET, film units, and precision conduit extrusion units, which have always been the domain of foreign companies. Developing domestically produced precision injection and extrusion equipment with independent intellectual property rights is very necessary. It can not only replace imports but also allow China to occupy a position in the international plastic machinery market. Traditional plastic machinery still has potential for energy savings due to the past design's focus on individual machine production capacity. In the design of energy-saving plastic machinery, production speed is no longer a key indicator; the key is the energy consumption per unit weight of the product processed. Therefore, it is necessary to optimize the mechanical structure, control mode, and operating process conditions based on low energy consumption.

As energy conservation and consumption reduction rise to the level of national strategy, the energy-saving issue of injection molding machines has also received extensive attention. In the conventional field of injection molding machines, energy-saving measures for the motor include two relatively mature methods: variable-frequency drives and servo motors, with servo motors increasingly being widely accepted.

Servo Energy-Saving Series Injection Molding Machines, equipped with high-performance servo variable speed power control systems, provide different frequency outputs during the molding process based on varying pressure and flow rates, and implement closed-loop control of pressure and flow. This achieves rapid response, matching, and automatic adjustment of the servo motor to the energy demands of the injection molding machine.

1. Utilizing energy-saving components such as high-performance servo controllers and servo motors.

2. Responsive servo control system with a quick start-up reaction time of just 0.04 seconds.

3. Servo motors and hydraulic systems form a closed-loop control, significantly improving the repeat accuracy compared to traditional models.

4. Reduce the impact on the mold opening, extending the service life of mechanical parts and molds.

5. Reduce power consumption, with an energy-saving efficiency of up to 20% - 80% compared to traditional injection molding machines under ideal operating conditions.

6. The system generates significantly less heat than traditional injection molding machines, saving about 30% of the cooling water usage and extending the lifespan of oilway seals and hydraulic components.

7. Operating noise is significantly lower during full-line operation, compared to traditional injection molding machines.

Dual-color injection molding machine

Now, standard injection molding machines can only produce plastic products in a single color. To achieve a specific color, you simply add the corresponding color powder or masterbatch to the plastic material. With the advancement of technology, a new type of injection molding machine capable of producing mixed-color plastic products has emerged, known as the dual-color injection molding machine. Once a plastic products manufacturer has such a machine, they can use the existing molds without the need for new mold creation and can produce mixed-color plastic products without additional equipment. These mixed-color plastic products are aesthetically pleasing with a wide range of colors. The working principle of the dual-color injection molding machine is as follows: the clamping mechanism is similar to that of a standard injection molding machine, but it features two sets of mechanisms, two sets of screw barrels, two power systems, and two oil pumps. The injection system is doubled. Both systems share a single nozzle. The two system units inject two different colored plastic materials simultaneously or alternately into the mold cavity, achieving a mixed-color effect on the surface of the plastic.

Specs: HYW68, HYW98, HYW138, HYW168, 8HYW208, HYW288, HYW368, HYW428, HYW528, HYW630, HYW728, HYW850, HYW1100