Special-Purpose Plastic Injection Molding Machines

Advantages and Disadvantages of Compression Injection Molding Machines

Vorteile:

• Lower injection pressure

• Reduced shear stress

• Uniform holding pressure

• Lower internal stress

Benachteiligungen:

• Limited part geometry

• Complex processing requirements

• Requires advanced mold technologies

• Limited applicability due to structural constraints

Injection Compression Plastic Injection Molding Machines Applicable Products

The injection compression function can improve the quality of the product and reduce the load of the equipment, but due to the limitation of the difficulty of realizing the compression function, it is suitable for the large-size thin-walled or the products that do not have high spatial structural requirements, but have high quality requirements.

Injection Molding Foam Injection Molding Machine

Injection Molding Foam Plastic Injection Molding Machines: There is no big difference between the appearance and ordinary injection molding machine, only the function is different.

Principle of Injection Foaming Injection Molding Machine

Injection Foaming Plastic Injection Molding Machines, also known as microfoaming injection molding machine, as opposed to ordinary injection molding machine, foaming injection molding machine will contain high-pressure gas injection of raw materials into the mold cavity, and then through the closing mechanism of the mold micro-opening, to ensure that the raw materials in the mold cavity foaming molding. There are two types of foaming methods: physical and chemical.
Chemical foaming: by adding foaming agent to the injection molding raw materials, high pressure molten material injected into the mold cavity for foaming. This process does not require additional equipment, except for the addition of the proportion of foaming agent.
Physical foaming: High-pressure gas is injected into the molten section of the barrel of the injection molding machine through a high-pressure controller, mixing the material so that it is fully mixed with the raw material and maintain a continuous pressure into the mold cavity to complete the foaming process. The process needs to provide high-pressure gas, another supporting high-pressure controller, and integrated with the injection molding machine system. Physical foaming high-pressure gas to nitrogen-based, carbon dioxide and other inert gases can be used, but the corresponding process conditions need to be adjusted accordingly.
The advantage of physical foaming over chemical foaming is that the foaming is sufficient, no chemical residue in the product, and the subsequent production cost is low, but the equipment control is complicated, the input cost is high, and the quality of the product skin is poor.
Comparison between microfoam and traditional injection molding:

Similarly, injection foaming is realized in two forms: sequential foaming and simultaneous foaming, depending on the micro-opening intervention time.

Injection Foam Plastic Injection Molding Machines Advantages and Disadvantages

Vorteile:

• Precise dimensional control

• Improved warpage and deformation resistance

• Geringeres Produktgewicht

• Reduced internal stress

• Lower injection pressure

Benachteiligungen:

• Chemical foaming may leave residual chemicals in products

• Physical foaming may result in poor surface finish

• Lower impact resistance of finished parts

• Complex mold structure required

• Limited applicability due to structural constraints

Injection foam injection molding machine for products

The biggest advantage of the injection foam process is to reduce the use of raw materials to reduce costs, according to the different quality requirements of the product, can reduce the cost of raw materials by about 30%, so it is suitable for all kinds of products, especially for single-weight heavier products. However, due to the high requirements for the mold, it is necessary to fully consider whether the product structure is suitable for the foaming process.

Multi-color Plastic Injection Molding Machines

Multi-color injection molding machine is a multi-component machine, there are more than one set of injection part and molding part together, the shape and structure of the ordinary injection molding machine has a big difference.

Multi-color injection molding machine composition

Multi-color Plastic Injection Molding Machines is also known as multi-component molding injection molding machine, often referred to as two-color injection molding machine is one of the categories. Compared with a set of injection system corresponding to a multi-component machine with multiple mold parts, multi-color injection molding machine has multiple sets of injection system working together with a set of molding system. Multi-color injection molding machine combination of different forms, the common two-color injection molding mainly contains the following forms.

Take the common two-color injection molding machine as an example, due to the need to achieve alternate injection of different colors or composition of raw materials, the increase in the injection part at the same time need to close the mold part of the auxiliary mold changeover device to achieve, the industry can be achieved within 1 second to 180 ° rotation of the loading plate.

Multi-color injection molding machine applicable products

Multi-color Plastic Injection Molding Machines is mainly used for small-sized machines, which are mainly used in the automotive industry for lamps, multi-layer materials or products with simple structure that need to be assembled, and so on. At present, the industry has introduced the use of two-component machine to realize the instrument panel softening.

Energy-saving equipment

With the global energy shortage and the emergence of energy-saving technologies, the energy-saving Plastic Injection Molding Machines have also been the industry’s attention, and the energy-saving measures have been matured there are mainly two: the power part of the use of full servo drive, the heating part of the use of a new type of heating method, in addition, some of the Plastic Injection Molding Machines system suppliers began to focus on the development of more energy-efficient injection molding system.
For the traditional injection molding machine servo transformation work, also basically from these three aspects, but taking into account the technical and cost factors, the heating part of the transformation work is relatively low input cost, easy to promote; servo transformation, although energy saving efficiency is higher, but the transformation cost is higher; system energy-saving upgrade is generally dependent on the servo transformation, the industry has not yet been promoted.

Injection molding peripheral automation

In recent years, based on the maturity of the supporting industry technology and the pressure of production costs, the industry on injection molding peripheral automation and unmanned injection molding workshop calls for more and more urgent, the injection molding machine and its related peripheral facilities of the integration of the increasingly perfect. Taking Yanfeng-Piou as an example, the injection molding machine for bumper production is arranged as follows.

The body of the injection molding machine and its configuration:
Haitian JU33000-19300, KUKA robots, pickup workpiece, flame treatment, hot melt knife, edge crusher, electronic tags, hand-held flame gun, product identification system, mold change platform, mold preheating system and other 11 workpieces or equipment.
Process flow:
Robot pickup, spout pickup, flame treatment, product placement, manual handling, product identification labeling, manual flame treatment, manual packaging, and transit.
Machine edge crusher to realize the reuse of water spout.
Electronic labeling to achieve product information tracking, and traceability.
Staffing:
1 person.
In the full production process, the staffing needs from the industry generally recognized product processing aspects, transferred to handling, labeling and packaging, and this part of the work can also be synchronized by robots or automated tooling to complete.
As the degree of automation around the production of injection molding machines and unmanned warehousing systems improve, the combination of unmanned workshops and unmanned warehousing systems for injection molding machines will make the injection molding industry trend.

Industry Comparison

Plastic Injection Molding Machines Configuration
The injection molding machines in the factory are mainly Chenhsong machines, all of which are three-platen horizontal injection molding machines, and the models include HTF (traditional machine), MA (energy-saving Ⅰ generation machine), and VE (motor), of which the HTF model is 40%, and the equipment purchased before 2008 accounts for about 23%.
Automation configuration
is mainly realized by adding robot, the rate of addition is about 44%, mainly for small models. The robots are mainly Weili 3-axis servo robots, and the bumpers are picked up by ABB.
All injection molding machines above 780 tons in the factory have been installed with magnetic plates.
Degree of automation
The robot is mainly used to realize the picking up of parts, and automatic de-watering tooling has been developed for some products.
In the part of mold changing, there is no platform for mold changing, and the transferring of molds should be done manually.
The actual situation of the nodule factory, refer to Yanfeng for comparison.
Plastic Injection Molding Machines configuration, the factory injection molding machine HTF type proportion is larger, and part of the machine purchased about 7 years old, performance and new models there are differences. MA type and Yanfeng basically the same, but it is understood that the Yanfeng machine according to its production characteristics of the configuration of the optional, the performance of the overall performance may be higher than the performance of the factory’s standard injection molding machine.
The factory can choose high-performance injection molding machine according to the demand of subsequent models, or consider replacing the underutilized machine with a new injection molding machine to improve the overall performance of the equipment.
In terms of automation configuration, the rate of robot configuration is relatively low, especially for large-tonnage injection molding machines.
According to the characteristics of the products produced in the factory, the factory can install robots on the machines with high utilization rate to improve the configuration rate. Mold change system, taking into account the layout of the site and machine retention, is not suitable for the configuration of automatic mold changing platform, or targeted configuration needs to be evaluated.
In terms of automation utilization, most of the manipulators are only used for picking up parts, the utilization rate is relatively low, and the rest of the auxiliary functions, such as de-watering, handling, assembly, etc. should continue to be developed in order to reduce the demand for manpower and enhance the automation utilization rate.