Blow Molding Machine is a machine for producing hollow products by using gas pressure to blow and blow hot molten parison into the mold. The way the extrusion blow molding machine works is that it puts the raw material extruded from the extruder and the thermoplastic coating of the intestine, which is still in a softening state, into the mold. Then, through compressed air, using air pressure, it deforms the blank along the mold cavity, so it blows into the mold to mold the plastic into the shape of the mold.
Blow molding machine or blow molding extrusion is the most important shaping technology for the production of hollow plastic products. Almost all thermoplastics can be used in the extrusion blow molding machine, such as polyethylene PE, PVC, polypropylene PP, PET, linear polyester, polycarbonate PC, polyamide, cellulose acetate and formaldehyde polyacid resin and etc.
With this molding technology, it can not only produce bottles with a small volume of a few milliliters, but also barrels and water storage tanks with a capacity of thousands of liters, as well as floating balls, car fuel tanks and kayaks.
extrusion blow molding machine for the production of medical products
In the medical field, many products are produced using the technology of extrusion blow molding machine and using different polymer materials: HDPE, LDPE, PVC, PET, PP, PC, EVA, as well as techno-polymer materials such as Teflon, polytetraamides and many others. . The selection of the most suitable material is of particular importance, especially when the application involves the fabrication of a machines that is in contact with human tissue or must maintain continuous sterilization in an autoclave.
extrusion blow molding machine
In the past years, Pars Machinery Co., Ltd. has designed a lot of extrusion blow molding machine for the production of medical products such as test tubes and tubes for laboratory analysis, small pumps for ECG suction. Containers made of thermoplastic rubber, soft PVC containers and Teflon products for hospital use, inhalation and feeding bottles made in Macrolon, polypropylene bottles for physiological solutions, PVC dialysis tubing, as well as small bottles and cans for Tablets, eye or nose wash dropper containers made of PE, PVC or PETG. Each of these projects requires special technology in planning, design and regulation, which sometimes requires the use of special alloys suitable for very high working temperatures to process unusual plastic materials or special automations for finishing, handling and packaging of different products.
With the introduction of electric drives, Pars extrusion blow molding machine became more advanced in the field of packaging medical products, because the complete absence of hydraulic machines prevents contamination of products or the environment and allows the machines to be used in sterile rooms or in controlled atmospheres.
The new generation of extrusion blow molding machine
Consistency of movements, because without oil, there is no difference in movement when the working temperature changes.
More production, thanks to faster cycle times and reduced production waste due to more continuous movements.
Lower running costs due to lower energy consumption
Lower maintenance cost due to the absence of hydraulic components.
Reducing environmental pollution due to the absence of oil and reducing the noise level.
For example, by examining a specific product, Pars Pharma has gained significant experience in making extrusion blow molding machine for the production of laboratory Pasteur pipettes, which are basically droppers for laboratory use, which are named after their inventor, Louis Pasteur. A pipette is made up of a thin capillary and a wider top that acts as a pump. The capillary section is engraved with a graduated scale, usually 1 to 3 ml. The operation of a pipette basically consists of squeezing the dropper in order to expel the air from the small tube and submerge it into the fluid. When the pump is released, there is no pressure balance, so the fluid rises in the tube and cannot leave until the pump is compressed once more. Due to the type of performance, it is important that the material is sufficiently elastic and soft.
However, the production of pipettes using a blow molding plastic extrusion machine involves the presence of sprue around the perimeter, and the sprue must be automatically removed in the machine. Therefore, it is appropriate that the material is also hard enough to enable the cutting of scraps. To meet all these requirements, the pipette must be made with a suitable mixture of LDPE and EVA. The PB250/S has a three-cavity mold that produces 2,000 pieces per hour, as well as extrusion blow molding machine to produce 16,000 pieces per hour. For medium productions, the most interesting electric blow molding machine is a single station, mod. PB2E/S, with 60mm extruder and 3 output heads to produce more than 6500 pipettes with a compact and easy to manage extrusion blow molding machine
Features of extrusion blow molding machine
Another application of the extrusion blow molding machine is the packaging of injectable solutions, where plastic bottles are quickly replacing ordinary glass bottles for economic and practical reasons, and as a result, they are lightweight, unbreakable and easily portable. The study of new shapes with limited thickness has led to the production of folding bottles like flexible bags, but with more affordable costs.
Different plastics, mainly PP, LDPE or HDPE, can be used for the production of bottles intended for different types of serums. These materials are approved for use in injectable liquid packaging. Materials are selected based on cost, availability, sterilization temperature, and compatibility with the packaging liquid.
Advantages and characteristics of extrusion blow molding machine
Flexible design, high performance and low production cost.
Processing technology can change the thickness of the bottle.
During processing, the thickness of the product can be changed as desired without changing the mold.
Low pressure molding (mold internal stress is much smaller than injection molding), so as to improve dimensional stability, chemical corrosion resistance and high temperature performance.
Variety of assembly
Simple format, low cost and short processing cycle.
Low cost sample mold can be produced quickly.
Blown plastic is a manufacturing process in which hollow plastic parts are formed, it is also used to shape all kinds of bottles, cans, yogurt pots and plastic gallons for the chemical and petrochemical industries, etc. In general, there are three main types of blow molding: extrusion blow molding, injection blow molding, and stretch injection molding.
Features of extrusion blow molding machine
Stable operation with advanced PLC
Transfer products automatically with a conveyor belt
Ability to adjust the thickness of the product
High safety with an automatic security locking machines in any mechanical action that causes the safety mode to be activated in the event of failure of any part.
Basically, blow molding is the production of a hollow plastic piece and creates a container in various shapes and sizes. Blow Molding and Injection Molding is one of the most used techniques and usually by using this technique we produce high quality plastic parts with minimal cost so it is a great cost effective method. Blow molding is an old technique used to create hollow objects. There are many factors involved in the molding of plastic and injection molding, including “type of plastic, speed and temperature”. Air is one of the most important factors and plays a vital role in the molding of blowing plastic. Air is blown into the parison placed inside the mold to expand it and give it the desired shape. The blow molding process is very easy, widely used and involves low-cost machinery, making plastic bottles using this process is much cheaper than injection molding.
The price of extrusion blow molding machine
Molding with plastic blow molding machines – is a very special production process in which hollow plastic parts are formed and can be connected to each other.
The purchase of extrusion blow molding machine is widely used in the production of packaging products in the pharmaceutical and health industry, cosmetics, food industry, dairy, petrochemical, commercial drinks, etc. Blow molding machines create a plastic bottle according to a specific recipe, for example, it specifies the capacity of the bottle made. This machines consists of molds, a programmable logic controller, and mechanical and electronic tools.
Therefore, the price range of these machines can be very wide and diverse according to its type and field of use.
Among the most used extrusion blow molding machine, we can mention the 4-literextrusion blow molding machine, the 20-liter extrusion blow molding machine, the 60-liter extrusion blow molding machine, etc.
Dear artisans who work in various industries, from the pharmaceutical industry to the food and petrochemical industries, beverages, etc., can buy all kinds of extrusion blow molding machine, , PET bottle blowers and injection blow molding machine through communication channels. Get in touch with our experts.