The plastic injection device consists of various parts and components, each of which has a vital role in the proper functioning of the device. The defect or absence of any piece can stop the production process and bring significant costs.
In this article, we introduce you to the components of the plastic injection machine and the importance of each.
Mechanical components of plastic injection machine
Plastic injection machine also has various mechanical components, each of which has its own unique performance. One of the most important mechanical components of the plastic injection machine is the carriage, hydromotor, element, cylinders, spirals, pumps and valves that are introduced below.
Carriage
The carriage part of the device to inject material into the mold includes the following parts:
1. Mardon cylinder
2. Hydromotor
3. Funnel
4. Jack Injection
5. The lions associated with it
The process of implementation
material enters the cylinder from the funnel by spiral rotation and its shear heat and heat from the heaters, melting materials and directed to the front of the cylinder. The cylinder directs the spiral injection forward and the molten material accumulated in the front of the spiral is injected into the form.
Hydro Motor
The gearbox is done by the hydromotor. Hydromotor or hydraulic engine is a continuous period that is used to create the required torque for rotational load period. In fact, in the plastic injection stations, the hydro -motor motor has the duty to move the Mardon.
Cylinder
The cylinder is made of a steel cylinder with a spiral that has a return movement. The heater, which is often electric heaters, is located around the cylinder as a source of heating. The thermocouples are mounted in different areas of the cylinder, controlling the temperature with a slight deviation relative to the adjustable temperature. The cylinder, with the exception of the nozzle, consists of three areas of feed, compression and measurement. The cylinder of the injection machine is designed to fit the spiral reciprocal movement.
Increasing temperatures from the beginning to the end of the cylinder is not a good idea for all kinds of components. Cylinder temperature profile by mold size and product can be increased, reduced, uniform or curved. In order to use the optimal injecting capacity, it is necessary to determine the process and quality of the component, from the feed hopper to the nozzle. Overall, the cylinder temperature of the injectable molding machine is gradually increasing with a very low slope, but there are exceptions, for example, often adjusted in the PVC linear temperature or with a very low slope. Decreases to prevent falling or overflowing in the nozzle.
Element
First I have to say what is the element? In various devices, a device called element is used to control temperature and heat. Plastic apparatus devices are no exception. The enclosures have been created from conductive wires that pass power and heat and are highly resistant to them. These elements are electric or gas.
Spiral
lower spiral speed improves the distribution of additives and helps maintain temperature in thick parts. Changing spiral rounds and loading rates affect the output. As the loading rate increases and the spiral speed increases the amount of output increases.
During the production process, the polymer material is melted due to the spiral mechanical energy of the rotary and the thermal energy of the cylinder. As soon as the production is stopped, the spiral stands for a short period of time and the cylinder may cool the rest of the material, especially when the canal is semi -full or the depth of the canal is high, in which case the molten material distribution may change. Stopping the injection machine is an undesirable and processing process, but it constantly occurs to produce parts with different conditions.
In this case, the polymer melt stays in the cylinder and causes thermal and oxidation. Short stops for polymers such as polyethylene are not problematic, but it is critical for polymers containing unsaturated ABS or PVC chains. The clamp part of the injection machine provides the force needed to open and close, hold the mold and exit the final piece. This unit contains fixed and moving bars and parts to open, close and lock the mold. As shown in the figure below, the constant part of this unit is inserted to maintain the balance between the forces from the four corners by the four beads.
Pump
generally refers to a device that takes mechanical energy from an external source and transfers to the fluid it passes. As a result, fluid energy increases after exiting the pump. It moves from one point to one point. Pumps have different types. Different categories classify pumps based on different features. In one of the most common of these classifications, the pumps are divided into two of these classifications:
Hydraulic Tap
Hydraulic Tap is one of the components of a plastic injection device used to control the flow and hydraulic pressure. This valve is used to direct the flow of plastic material into the mold and adjust the pressure required for the injection. This valve operates manually or using the hydraulic control system and plays an important role in the process of plastic injection.
Project valve can simply control the performance of the hydraulic system. It is useful to use Pro -Coat Milk instead of a regular valve to control the movement of the device clamp. At this point, as the PLC consumes, this valve directs the oil to the system at a significant speed and variable pressures, and due to the precise control of the oil consumption in this model, the oil tank will be lower (temperature). In addition, it has less power consumption than other devices.
Hydromotor Pump Controller Valve
Hydromotor Pump Controller Valve is also one of the components of a plastic injection device used to control the current and hydraulic pressure in the hydromotor pump. This valve is used to adjust the current and pressure needed to move the mold and inject plastic material into the mold. This valve can also operate manually or using the hydraulic control system and plays an important role in the process of precision and process control in the process of plastic injection.