Drinking straw machine extrusion

Drinking Straw Making Machine data
drinking straw machinePP drinking straw

Polypropylene Drinking straw making machine extrusion have 1 color, 2 colors,3 colors,4 colors,5 colors
drinking straw diameter from 3mm to 15mm.
Suit market:Drinking bar,milk drinking straw,cocktail stir straws,cocktail drinking straws,cofa bar,Lollipop.

This model is a tube extrusion line, composed of extruder and die ,Vacuum calibration and cooling unit,haul-off unit, rotary cutter unit, The series machines can produce all kinds of drinking straw,spiral strip straw,medical pipe, all the machine’s controls base with the control elements ergonomically adapted to permit easy operation.

TECHNICAL FEATURE

1.The extrusion die can be special designed and easy exchanged to produce pipe and shaping stuff,
2.Water bath in stainless steel can be adjusted in three planes ,
3.The haul-off unit can be belt or rollers, it is customizable.
4.Fitted with single or double rotary cutter .

Video of drinking straw making machine
Kingdom Machine Co.,ltd
Tel.:0086-577-66881211;      Fax:0086-577-66881311
Mobile:0086-13088651008;       
Whatsapp:0086-13958812663;

www.kingdommachine.com;
[email protected];
Whatsapp/Viber/Tango:+86-13088651008
Skype:Kingdombillwang
Ruian Economic Zone,Wenzhou,China 325200 

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Blown Film Extrusion Introduction

Blown Film Extrusion Introduction
Blown film extrusion is a technology that is the most common method to make plastic films, especially for the packaging industry. The process involves extruding a tube of molten polymer through a die and inflating to several times its initial diameter to form a thin film bubble. This bubble is then collapsed and used as a lay-flat film or can be made into bags. Usually polyethylene is used with this process, and other materials can be used as blends with these polymers. A diagram of a polyethylene chain is shown in Figure 1 to the right.
Background Theory on Polymers

In the cooling step of blown film extrusion, the amorphous, transparent melt crystallizes to form a translucent, hazy, or opaque film. The point where opacity begins in the bubble is known as the frost line. 
Fig 1: Model of polytheylene chain frompolyethylene Wikipedia article.The frost line height is controlled by several parameters: the air flow, film speed, and temperature difference between the film and the surroundings. Properties of the film, such as tensile strength, flexural strength, toughness, and optical properties, drastically change depending on the orientation of the molecules. As the transverse or hoop direction properties increase, the machine or longitudinal direction properties decrease. For instance, if all the molecules were aligned in the machine direction, it would be easy to tear the film in that direction, and very difficult in the transverse direction.

The Film Blowing machine Process

Fig 2: Schematic of set-up from User:J.Chiang.

Typically, blown film extrusion is carried out vertically upwards, however horizontal and downward extrusion processes are now becoming more common. Figure 2 shows a schematic of the set-up for blown film extrusion. This procedure consists of four main steps: The polymer material starts in a pellet form, which are successively Read More ...

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