EPS machine -Expandable polystyrene machine


1.The EPS machine adopts PLC and touch screen,automatic filling,electronic weighing,temperature control,material level control to realize automatic production
2.Machine is complete with Screw Conveyor and Electronic Weight system
3.Closed expansion chamber enables expansion under constant pressure.high steaming efficiency and steam saving
4.With proportional valves to control steam and air flow
5.With photocell or vibration sensor to control material level.ensuring density tolerance within¡À3%
6.The machine is equipped with fluidized bed dryer.including drying.automatic sieving.delumping and material conveying to silos

Cutting machine key technology

Laser cutting machine cutting several key technologies is light, mechanical and electrical integration of integrated technology. Laser beam parameters, machine and numerical control system performance and accuracy have a direct impact on the efficiency and quality of laser cutting. Especially for the cutting accuracy or thickness of the larger parts, we must master and solve the following key technologies:
1, the focus position control technology:
One of the advantages of laser cutting is the high energy density of the beam, typically> 10 W / cm2. Since the energy density is proportional to 4 / πd2, the focal spot diameter is as small as possible to produce a narrow slit; the focal spot diameter is also proportional to the focal depth of the lens. The smaller the focusing lens focal depth, the smaller the focal spot diameter. But the cutting is spattered, the lens is too close to the workpiece is easy to damage the lens, so the general high power laser cutting industry widely used 5〃 ~ 7.5〃 “(127 ~ 190mm) focal length. The actual focal spot diameter of 0.1 ~ 0.4mm For high-quality cutting, the effective depth of focus is also related to the diameter of the lens and the material to be cut, for example, with a 5-inch lens cut carbon steel, the depth of focus is within +2% of the focal length, In the cut material surface is very important.Consider the cutting quality, cutting speed and other factors, in principle <6mm of metal material, the focus on the surface;> 6mm carbon steel, the focus on the surface;> 6mm stainless steel, The focus is under the surface. The exact size is determined experimentally.
2, there are three easy ways to determine the focus position in industrial production:
(1) printing method: the cutting head from top to bottom movement, laser beam printing on the plastic plate, print the smallest diameter at the focus. (2) Ramp method: Use a plastic plate diagonal to the vertical axis to pull it horizontally to find the smallest point of the laser beam. (3) blue spark method: Remove the nozzle, blowing air, the pulse laser hit the stainless steel plate, the cutting head from top to bottom movement, until the maximum blue laser focus.
For the flying light path of the cutting machine, due to the beam divergence angle, cutting the proximal end and distal end of the optical path length is different, there is a certain difference between the beam size before focusing. The larger the diameter of the incident beam, the smaller the diameter of the focal spot. In order to reduce the change of focal spot size caused by the change of beam size before focusing, domestic and foreign laser cutting system manufacturers provide some special devices for users to choose:
(1) collimator. This is a commonly used method, that is, a parallel light pipe is added at the output end of the CO2 laser to expand the beam, the expanded beam diameter becomes larger and the divergence angle becomes smaller, so that the proximal end and the distal end within the cutting working range The beam size before focusing is nearly the same. (2) Add a separate movable lens lower shaft to the cutting head, which is independent of the Z axis that controls the nozzle stand off from the material surface. When the machine table is moved or the optical axis is moved, the beam moves from the near end to the far end F-axis at the same time. After the beam is focused, the spot diameter is consistent throughout the machining area.

Article Source: Fuyang rules plastic machinery

Foam packaging

Foam packaging, simply put, is the use of foam made of packaging. Commonly referred to as foam packaging, mainly refers to the expandable polystyrene (EPS) raw materials through the mold by the thermal processing, the production of packaging products commonly known as “foam.” Expandable polystyrene is an ideal packaging material, through the molding process, according to the need to be processed into a variety of shapes, different thickness of the packaging products. In the case of high load, the material through the deformation, energy absorption, decomposition of energy to achieve the buffer, damping effect, at the same time with insulation, thermal insulation function. EPS packaging products are generally white, according to the requirements of production color.

The main use of features:
1, light weight. Part of the space for EPS packaging products is replaced by gas, which contains between 300 and 6 million closed-cell blisters per cubic decimeter. So it is several times larger than the plastic volume to several times.
2, with the ability to absorb the impact load. EPS packing products by the impact load, the bubble of gas through the stagnation and compression, so that external energy consumption, dissipation, foam with a smaller negative acceleration, and gradually terminate the impact load, it has a better anti-shock effect.
3, good thermal insulation. Thermal conductivity is the weighted average of pure EPS thermal conductivity (108 cal / m.h. ° C) and air thermal conductivity (90 cal / m.h. ° C or so).
4, good sound insulation. EPS products mainly through sound insulation in two ways, one is to absorb the sound energy, reduce reflection and transmission; the second is to eliminate resonance and reduce noise.
5, anti-aging, corrosion performance. In addition to prolonged exposure to high-energy radiation, the product no obvious aging phenomenon. Can withstand many chemicals, such as dilute acid, dilute alkali, methanol, lime, asphalt and so on.
6, anti-static performance. Because EPS products have lower electrical conductivity, they are easy to produce self-charging phenomenon in friction, and will not affect general user’s products. For high-precision electronic products, especially modern large-scale integrated components of electrical components, should use anti-static EPS products.