Manufacturing process for forming and joining together hollow plastic parts
The blow molding process
Blow molding (or moulding) is a manufacturing process for forming hollow plastic parts. It is also used for forming glass bottles or other hollow shapes.
In general, there are three main types of blow molding: extrusion blow molding, injection blow molding, and injection stretch blow molding.
The blow molding process begins with softening plastic by heating a preform or parison. The parison is a tube-like piece of plastic with a hole in one end through which compressed air can enter.
The plastic workpiece is then clamped into a mold and air is blown into it. The air pressure inflates the plastic which conforms to the mold. Once the plastic has cooled and hardened the mold opens and the part is ejected. Water channels within the mold assist cooling.
three main types of blowmolding: extrusion blowmolding, injection blowmolding, and injection stretch blowmolding. The blowmolding process begins with...
commercialization of plastic molding equipment, injection molding and extrusion molding became the most common industrialized processes. Blowmolding is the third-largest...
Rotational molding (BrE: moulding) involves a heated mold which is filled with a charge or shot weight of the material. It is then slowly rotated (usually...
Rotary wheel blowmolding systems are used for the high-output production of a wide variety of plastic extrusion blow molded articles. Containers may be...
design flexibility: suitability for coextrusion (coprocessing: molding, extrusion, blowmolding) with other polymers for multipart system designs; weight reduction:...
higher MFR will fill the plastic mold more easily during the injection or blow-molding production process. As the melt flow increases, however, some physical...
liquid form using a mould Blowmolding as in plastic containers or in the glass container industry – making hollow objects by blowing them into a mould Casting...
precise control of the cylinder. One example of servo valve use is in blowmolding where the servo valve controls the wall thickness of extruded plastic...
parts being formed. Thermoforming differs from injection molding, blowmolding, rotational molding and other forms of processing plastics. Thin-gauge thermoforming...
extrusion or injection molding of a conventional thermoplastic are generally suitable for TPEs. TPEs can also be processed by blowmolding, melt calendaring...
what the surrounding environment will be etc.). A common technique is blowmolding. Like any object made by extrusion, it is possible to produce multilayer...
products. The BFS process functions similarly to conventional extrusion blowmolding, and takes place within a BFS machine. First, a plastic polymer resin...
ink. The size ranges from very small bottles to large carboys. Consumer blow molded containers often have integral handles or are shaped to facilitate...
prevented entirely. As a result, bottles are obtainable via stretch blowmolding ("SBM"), which are both clear and crystalline enough to be an adequate...
form the plastic into almost any shape. Film blowing - Plastic films (carrier bags, sheeting) Blowmolding - Small thin-walled hollow objects in large...
extrusion and coextrusion, thermoforming, injection molding, extrusion blowmolding, and structural foam molding. ASA is mildly hygroscopic; drying may be necessary...
desired article. For example, in extrusion blowmolding it is common to use punching dies to remove tails, molding flash (scrap plastic) and handle slugs...
complex 3 dimensional shapes, by a range of different methods - such as blowmolding, vacuum forming, etc. A similar layout is possible for a cylindrical...
Global Information