Views: 4 Author: Site Editor Publish Time: 2022-06-03 Origin: Site
The biodegradable plastic extruder can produce completely biodegradable plastics, which are mainly made from natural polymers (such as starch, cellulose, chitin) or agricultural and sideline products through microbial fermentation or synthesis of biodegradable polymers, such as thermoplastic starch plastics, fats Polyester, polylactic acid, starch/polyvinyl alcohol, etc. belong to this type of plastic.
What are the feeding devices of the biodegradable plastic extruder?
How to solve the problem of uneven discharge of biodegradable plastic extruder and black spots on extruded products
What is the temperature range of the biodegradable plastic extruder?
1. Hopper
The hopper of the biodegradable plastic extruder is generally made in a symmetrical form. There is a window on the side of the hopper to observe the material level and feeding situation, and there is an opening and closing door at the bottom of the hopper to stop and adjust the feeding amount. A cover is added above the hopper to prevent dust, moisture and impurities from falling into it. When selecting the material of the hopper, it is best to use light, corrosion-resistant and easy-to-process materials, generally aluminum and stainless steel. The volume of the hopper depends on the size of the extruder and the feeding method. Generally, the extrusion volume of the extruder is 1 to 1.5 hours.
2. Feeding
The feeding methods of biodegradable plastic extruder include manual feeding and automatic feeding. Automatic feeding mainly includes spring feeding, blast feeding, vacuum feeding, conveyor belt feeding and so on. In general, small extruders use manual feeding, and large extruders use automatic feeding.
The main thing is to adjust the temperature control of the heater. Generally, the biodegradable plastic extruder will be divided into several temperature zones. The temperature from the feed port to the head side is higher. If the head temperature is normal, the temperature of the feed port should be lower. About 20 degrees, and so on. If the temperature is too high, the plastic will easily decompose. The so-called black spot is the paste! Quickly pull the screw and clean it up!
The granulation temperature range of the biodegradable plastic extruder mainly depends on the type of plastic you produce. The temperature of the machine head can be slightly higher by 5 degrees, and the other areas are almost enough. The following is the approximate temperature range of several commonly used plastics.
PP temperature: 170~190 degrees,
ABS temperature: 175 ~ 205 degrees,
PS temperature: 170 ~ 190 degrees,
PA6 temperature: 230 ~ 250 degrees,
PC temperature: 260 ~ 280 degrees
Nanjing Haisi Extrusion Equipment Co., Ltd. is a High-Tech company, which is composed of well-experienced team in R & D design, manufacturing technique, sales service and bases on extruder industry for many years. Our production series contain single crew extruder, co-rotating twin-screw compounding extruder, auxiliary equipment etc.
