The plastic raw materials undergo rigorous pre-processing, including drying, screening, and mixing, to ensure that they are suitable for injection molding. After preparation, the materials enter the heating barrel of the injection molding machine, where they are heated and plasticized into a uniform molten state. Then, the plunger or screw pushes the plasticized plastic into the nozzle of the machine. When a sufficient amount of plastic has accumulated in the nozzle, the injection molding machine injects it into the pouring system of the mold under pressure, filling the mold cavity. At the same time, the mold's cooling system starts to work, taking away heat from the plastic through cooling channels or media, ensuring rapid cooling and solidification in the mold cavity. This critical step allows the plastic to solidify and form the shape of the mold cavity, achieving the physical properties and dimensions required for the molded product. After the plastic cools and hardens, the mold is opened and the molded plastic product is pushed out or removed from the mold cavity. This process is called mold opening and demolding, and then the mold is closed to prepare for the next cycle.
Feature
1. Efficient production capacity: The automatic injection horizontal molding machine has impressive production capacity and is ideal for mass production. With advanced automation features such as robotic arms and conveyor systems, these machines can operate continuously without human intervention, significantly increasing output. Automated machines can reduce cycle times by up to 50% compared to manual processes. This is due to precise timing and control of the injection, holding, cooling, and ejection phases.
2. Fast injection speed: The fast injection speed of the automatic injection horizontal molding machine is crucial for producing high-quality molded parts. Rapid injection ensures that molten plastic fills the mold cavity quickly and evenly, minimizing defects such as air pockets and dents. Machines with high-speed injection capabilities can achieve injection speeds up to 500 mm/s. This allows the production of thin-walled parts and complex designs that require rapid filling of molds.
3. Stable clamping force: The stable clamping force of the automatic horizontal injection molding machine is crucial for producing parts with consistent dimensions and surface finish. Machines with strong clamping mechanisms and high-precision locking systems can maintain consistent clamping force throughout the entire molding cycle, ensuring parts are not deformed or damaged. Machine clamping forces range from a few tons to several thousand tons, depending on the size and complexity of the parts being produced.
Automatic Horizontal VS Vertical Injection Molding Machine
Machine Structure And Floor Area
Automatic horizontal injection molding machine: The design feature of an automatic horizontal injection molding machine is that its body is usually larger and lower, and the injection device and mold are arranged in a horizontal direction. This design allows the injection molding machine to handle large volumes of melt, enabling the production of large plastic products. However, this layout also leads to a disadvantage in the floor space of the horizontal injection molding machine. Due to their significant increase in width and length, horizontal injection molding machines typically require larger factory space to accommodate them. A standard horizontal injection molding machine may require at least 20-30 square meters of working area, not including peripheral equipment, raw material storage, and personnel operating space.
Automatic vertical injection molding machines: In contrast, vertical injection molding machines offer significant floor space savings through their vertically oriented injection unit and mold layout. Vertical injection molding machines have a compact design, making them ideal for factory environments with limited space. Vertical injection molding machines with the same injection molding capacity usually occupy only half or less of horizontal injection molding machines, about 10-15 square meters. This not only reduces rental costs but also improves the space utilization of the factory, making small batch and multi-variety production more flexible and efficient.
Characteristics Of Molded Products
Automatic horizontal injection molding machine: The automatic horizontal injection molding machine has powerful injection molding capacity and wide mold installation space, which is very suitable for producing large injection molded parts. For example, shoe soles, large containers (such as bottles), car parts, etc. These products often require higher injection pressures and larger melt volumes. The design of horizontal injection molding machines also allows for the use of more complex mold structures, enabling the production of large parts with complex geometries and high dimensional accuracy requirements.
Automatic vertical injection molding machine: Since the opening and closing direction of the mold is perpendicular to the direction of gravity, deviation, and shaking caused by the mold's weight are avoided, thus ensuring accurate centering of the mold when closing the mold. This stability is crucial for the molding of precision parts, as any slight deviation may lead to product dimensional deviations, surface defects, and other issues. The advantage of vertical injection molding machines in mold opening and closing stability makes the dimensional accuracy of its molded products usually within ±0.05mm or even higher, which is undoubtedly a huge advantage for small precision products such as connectors, plug-ins, and electronic component housings.
Injection Molding Method And Influence Of Gravity
Automatic horizontal injection molding machine: The automatic horizontal injection molding machine adopts the horizontal injection molding method, and the plastic melt is injected into the mold in a horizontal direction. This injection molding method reduces the influence of gravity on melt flow, which is beneficial to achieving uniform filling and reducing dents. However, when opening and closing the mold, due to the weight of the mold itself, there may be a forward tilt phenomenon, which affects the accurate opening and closing of the mold, especially in the case of large molds and high-speed opening and closing.
Automatic vertical injection molding machine: The melt of a vertical injection molding machine is injected vertically into the mold. Although this increases the impact of gravity on the melt flow, it is helpful to eliminate gas in the mold and reduce the generation of bubbles. At the same time, the mold is supported by a horizontal template when opening and closing the mold, effectively avoiding mold opening and closing problems caused by the mold's weight and ensuring accurate centering of the mold, which is crucial for precision molding.
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