Vents neck ring pinchoff mold body bottom insert pinchoff tail grabber slots for automatic trimmer a blow molding mold for a container with a handle. Extrusion blow molding moulding delta engineering belgium. Emsgrivory extrusion blow molding materials blow the blow molding 2. The parison consists of a fully formed bottlejar neck with a thick tube of polymer attached, which will form the body of the bottle. Guide to extrusion blow blow molding advisors at apex container tech inc. Fki is the largest and finest extrusion blow moulding machine, accumulator head blow molding machine, extrusion machines, multilayer blow moulding machine, blown film line, sheet making machine, extrusion lamination machine, cast film extrusion, plastic extrusion machinery, plastic extrusion. For additional troubleshooting information, contact your dow. This is the case and typical data for an extrusion blow moulding site shows a base load of 25% of the average total energy use and a process load of 1. The total blow molding industry is growing approximately 3e5% annually and will. The shape of the parison, especially its diameter and thickness pro. The polymer is injected into a closed mold with a blow pin and parison. Blow molding blow molding is the plastic processing technique where air is blown in a heated plastic untill it fills a mold and forms the desired shape to produce hollow parts. Ppt extrusion powerpoint presentation free to download.
Injection blow versus extrusion blow injection blow extrusion blow. Air is then blown into the parison, inflating it into the shape of the hollow bottle, container or part. Troubleshooting guide for blow molding problem possible causes possible solutions 1. It is not, however, intended to provide a complete listing of all blow molding challenges and problems. The process is not unlike that used for producing glass bottles, in that the. Injection blow molding is the process of inflating a hot, hollow, thermoplastic preform or parison inside a closed mold, so its shape conforms to that of the mold cavity. However, compared to extrusion blow molding, tooling costs on a cavity to cavity basis are higher, since blow molds, core rods and injection molds are all necessary to the process. Our pioneering technologies and services have allowed us to be one of the leaders of the plastics industry for 80 years. This course is available either on cds or online for 247. Extrusion blow molding lesson 3 extrusion blow molding. The topics covered in this training series include a wide range of.
Computer integrated manufacturing cim in extrusion blow molding. Learn about the extrusion blow molding process, and how apex can help you with your next project. It is also used for forming glass bottles or other hollow shapes in general, there are three main types of blow molding. The mold is removed and excess pieces are removed as well. Welcome to apex plastics blow molding manufacturing experts. Blow molding moulding is a specific manufacturing process by which hollow plastic parts are formed and can be joined together. Air is then blown into the parison, inflating it into the shape of the hollow bottle, container, or part. The blow moulding machine is based on a standard extruder barrel and screw. A typical blow molding process begins with a heated hollow thermoplastic tube, also known as preform or parison. Some grades are reinforced with glass fibres to increase their tensile strength, stiffness and dimensional stability. Highpressure preform foam blow molding request pdf. Extrusion blow moulding is expected to show a process energy load somewhere in between injection moulding and extrusion. Extrusion blow molding process regency plastics, gemini. How extrusion blow molding differs from injection molding.
Blow molding modified extrusion and injection molding process characteristics hollow thinwalled parts of various sizes high production rates low cost for making beverage and food containers. Polyethylene extrusion blow molding process guide formosa plastics corporation, u. Plastic bottle production what is extrusion blow molding. All about necks apex plastics extrusion blow molding. Extrusion blow molding, the most common process, is used for bottles or parts 250 ml in volume or larger. Although millions of objects are blow molded each year, blow molding is not a simple processing technique. The first step in the extrusion blow molding manufacturing process is the extrusion of a tube, also called a parison, of viscous plastic into a product mold. Since 1990 the development of technical blow molding materials has advanced, so that there is now a. Injection blow molding an overview sciencedirect topics. Extrusion blow molding process pdf industrial processes. Parison not being blown defective blow timer, clogged blow lines, or too sharp pinchoffs replace blow timer clean blow lines stone pinchoffs to create more pinch area reset cushion clean tooling 2. Extrusion blow molding is the largest of the three, followed by stretch blow molding and injection blow molding.
Technical data sheet extrusion blow molding of grilamid. Therefore, it is usually required for injection blow moulding, in which the cooling process of the parison is employed before inflated. Blow molding extrusion blow molding is manufacturing process that forms hollow thermoplastics. The mold closes around the parison and air is pumped in to inflate the parison against the mold walls. Extrusion blow molding series our extrusion blow molding training programs were developed in collaboration with the society of plastics engineers spe and were designed to provide participants with a thorough understanding of whats involved in extrusion blow molding. Each chapter is complete in its description of the material and has all the figures that are in the book. A within a split mold cavity, air pressure is applied to a heated plastic material called a parison that expands similar to a balloon and is shaped against the walls of the mold cavity.
What follows is an explanation of the extrusion blow molding process and how it differs from injection molding. The technology of converting plastic materials by the blow molding process is. Guide to extrusion blow blow molding advisors at apex. Concordia universitymech 4216511 lecture 171 outline blow molding process extrusion blow molding injection blow molding stretch blow molding thermoforming process analysis of polymer extrusion. The extrusion head design comprises several functional units that are defined on the basis of their tasks performed in the extrusion head. Extrusion blow molding machines kautex maschinenbau. Qenos produces a full range of alkatane hdpe grades for blow moulding applications ranging from thin walled high speed. In extrusion blow moulding ebm, plastic is melted and extruded into a hollow tube a parison.
When it comes to innovative extrusion blow molding machinery, you need look no further than kautex maschinenbau. Request pdf highpressure preform foam blow molding recently, several companies have started to use the foaming technology in blow molding processes, primarily in extrusion blow molding. Specializes in extrusion blow moulding machine, fong kee international machinery co. Blow molding design guideline blow molding design guideline 3 radii corners material will freeze when it comes into contact with the mold, causing it to stretch into corners if parison is trapped pinched off at parting line, it must stretch into the cavity preblowing the parison prior to mold closure helps minimize stretch. Extrusion blow molding ebm is a manufacturing process whereby plastic is melted and extruded that is, expelled to form a shape into a hollow tube. Blow molding is a manufacturing process widely used to create hollow thinwall plastic objects such as bottles, cases, containers, and bellows. After the plastic has cooled sufficiently, the mold is opened and the part is ejected. When extruding a polymer through a worm is based on compression of material, by means of an extrusion screw, which carries a mold as preform and. Apex plastics is dedicated to manufacturing high quality blow molded plastic products, providing timely deliveries and creating an atmosphere of continuous improvements where all employees strive to keep both internal and external customers satisfied. This parison is then captured by closing it into a cooled metal mold. While i am not new to plastics or sales i am relatively new to extrusion blow molding, your. This book, a guide to polyolefin blow molding, contains general information concerning materials, methods and equipment for producing high quality polyolefin blow molded products at optimum production rates. This booklet primarily deals with these problems as they appear in lightweight. Lomont molding provides fully customized blow molding services for your project needs.
Blow molding troubleshooting guide introduction this guide indicates possible causes and corrective actions for problems typically encountered in the blow molding process. If you blow air into a plastic tube that is closed on all sides except the point at which the air enters, the tube will. In extrusion blow molding ebm, plastic is melted and extruded into a hollow tube a parison. Strict stock control should be implemented, including lot control and turnover of inventory to reduce the storage time of materials. Injection blow molding ibm is similar to extrusion blow molding, except that the parison is formed by an injection molding process around a core rod or metal shank as shown in position 1 in the schematic in fig. Injection blow molding blow molding blow molding process.