Injection molding machine is one of commonly used equipment in plastic processing industry. It usually has to work for a long time. Therefore, how to ensure that injection machine works normally and stably in continuous production is a matter worthy of attention and attention for both manufacturer and user of injection machine. From user's perspective, regular preventive maintenance is an effective way to ensure normal operation of injection machine on premise of correctly selecting injection machine model.
Tag: injection molding machine
For an injection molding product factory, injection molding process accounts for approximately 60% of energy consumption. Therefore, effectively reducing energy consumption of injection molding machine is an important way for injection molding factories to save energy. As energy-saving technology of injection molding machine itself continues to improve, reducing overall energy consumption of injection molding factory requires comprehensive consideration from aspects such as production management, processing technology and materials, and production workshop facilities.
In manufacturing industry, injection molds and die-casting molds are two key tools that play a vital role in production of plastic and metal parts. Although the two molds may look similar in appearance, they have significant differences in structure, working principles, operating conditions and materials, application fields, advantages and disadvantages.
Most of methods for marking specifications of injection molding machines use three methods: injection volume, mold clamping force, injection volume and mold clamping force expressed simultaneously.
Full name of LCP plastic raw material is LIQUID CRYSTAL POLYMER. It is a new type of polymer material that generally exhibits liquid crystallinity in molten state. These materials have excellent heat resistance and molding processability. Polymerization method is mainly based on melt polycondensation, and solid phase polycondensation is often supplemented by fully aromatic LCP to obtain high molecular weight products.
According to characteristics of material and supply situation, appearance and process performance of material should generally be tested before molding. Supplied pellets often contain varying degrees of moisture, flux and other volatile low-molecular substances. In particular, moisture content of TPR, which has a tendency to absorb moisture, always exceeds allowable limit for processing.
First, dry plastic according to material requirements. For example, ABS drying temperature is 80℃ and drying time is 1-2 hours, or engineering materials must be dehumidified with a dehumidifier to achieve effect of no moisture or moisture. Then start pre-molding process: externally heat melting cylinder, and achieve required temperature inside melting cylinder through thermal balance. Then add material in solid particle state to hopper, and send particles to melting solution through screw return. Due to high temperature conduction, granular plastic is plasticized by thermal energy, transformed from particle state into a viscous liquid state, is sheared and compressed by screw thread to make density and viscosity uniform. This is the first process of completing pre-molding.
Definition of sink mark: partial collapse of surface of molded product (either in shape of dimples or in shape of ravines). 1. Products 1. Rib is too thick When rib is thick, place where rib and bottom plate meet is also thick, where plastic concentrates. When cooling, surrounding ribs and plates solidify first, center of intersection of this rib and plate remains liquid, plastic that solidifies later is ahead of plastic that solidifies first. It shrinks upward and has a sucking-in effect on surrounding plastic. If settling layer is weak in any one place (usually just at mold face opposite to rib), it may collapse into a sink mark at that place. Thickness of rib is preferably 50% of thickness of bottom plate, and can even be thinner.
As shown in Figure 1, NdFeB magnetic sensor is an E-shaped piece with a total width of 59 mm. Among the three branch forks, length of a single branch fork is 26 mm and thickness is 7 mm. Branch fork has two layers and a single layer thickness is 2 mm. After parts are magnetized, connecting beam is S pole of magnetic pole, three branch forks are N pole of magnetic pole.
Q 1. Manual operation is normal. In semi-automatic mode, you have to wait until mold opening is terminated before opening door. Thimble can be ejected, but ejector cannot be ejected before opening door. A 1. Is it an imported machine? There is an interlocking device, just change mode to Asian mode. 2. An error occurred in computer program.
Gud Mould 