Blow Molders Manufacturers and Companies

IQS Directory provides a comprehensive list of blow molders and suppliers. Use our website to review and source top blow molders with roll over ads and detailed product descriptions. Find blow molders that can design, engineer, and manufacture blow molding products for your company. Then contact the blow molders through our quick and easy request for quote form. Website links, company profile, locations, phone, product videos and product information is provided for each company. Access customer reviews and keep up to date with product news articles. Whether you are looking for manufacturers of extrusion blow molds, stretch blow molds, plastic blow molds, or customized blow molding of every type, this is the resource for you.

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ARTICLES AND PRESS RELEASES

  • R&D Molders, Inc. Adds New Bekum BM406D Blow Molding Machine

    R&D Molders announces its increase in high end equipment with the addition of a new Belkum BM406D blow molding machine. This will add to R&D's expertise in consumer and medical packaging solutions. The Bekum machine included dual head, double station options for four cavity output, automatic de-flashing, as well as 100% leak checking capabilities. R&D has also incorporated a central material handling system which was crucial to the success of the project due to the multi material blend and the thin wall nature of the containers. The consumer packaging application...

  • Cooked Meats and Stadium Seats

    Blow molders mainly produce plastic bottles. However, production is not limit to hollow plastic containers. In earlier blog posts I have written about blow molded Halloween and Christmas shapes as well as many toys for toddlers. Stadium seating is another one of the products blow molders produce that aren't some sort of container. When first examined stadium seats look like one of the most uncomfortable chairs ever designed. However once you park your caboose in one of these bad boys you'll find it quite the opposite or at least I...

  • Blow Molding 102

    Blow molding appeared sometime in the 1800s but blow molding companies didn't produce polyethylene bottles until the early 1940s. Most of the products produced with blow molding are hollow plastic containers. However, production capabilities are not limited to that just that. Blow molding produces strong plastic containers because chains of polymers are held together by a strong and fluid bond. This is why pop bottles are strong enough to withstand carbonated pressure and still be relatively thin. Most blow molding processes are completed in one step. Basically a mold has...

  • Improve Blow Molding with Parison Control

    Blow molding is already an inexpensive way to manufacture a variety of plastic products from plastic bottles to toys. However, there are always new innovations that can make the process easier, faster, and less expensive. One of these new methods is to use a variable speed drive and parison control during the blow molding process. Parison control improves the quality of the process and also reduces the amount of power that the unit uses. This works by weighing down the parison which creates a thinner top and thicker bottom on...

  • R&D Molders, Inc. adds new Bekum BM406D blow molding machine for consumer and medical packaging.

    May 7, 2013 – AUSTIN, Texas – R&D Molders announces its increase in high end equipment with the addition of a new Belkum BM406D blow molding machine. This will add to R&D’s expertise in consumer and medical packaging solutions. The Bekum machine included dual head, double station options for four cavity output, automatic de-flashing, as well as 100% leak checking capabilities. R&D has also incorporated a central material handling system which was crucial to the success of the project due to the multi material blend and the thin wall nature...

Industry Information

Blow Molders

Blow molders, used in the formation of blow molded plastic products, create hollow, thin-walled plastic components and parts. Using continuously running extruders and a tuned die-head, a parison, or tube-like piece of plastic, is formed from thermoplastic resins such as high and low density polycarbonate, polypropylene, polyvinyl chloride, polystyrene, polyamide and acetal.

During the blow molding process, a parison is clamped into a mold cavity, and compressed air is then forced into the tube with the help of a blow pin. The plastic expands, or “balloons” due to the air pressure and fills the shape of the cavity. The cavity is then cooled, usually through the process of conduction using liquid, and the molten plastic hardens and sets in the shape of the mold. The flow of air pressure into the parison needs to be carefully controlled to ensure consistent expansion of the plastic and uniform thickness of the product walls. Varying wall thicknesses could compromise the strength and durability of the final product. Blowmolders use blow molded plastics to manufacture many different products including toys, blow molded cases and drums, plastic beverage bottles and containers, sports equipment and a broad range of products used in the consumer industry.


The purpose of plastic blow molding is to form a uniform finished product that is smooth and airtight and does not need to be joined together in any way. Blow molders can be continuous process machines, such as rotary wheel systems, producing a high-volume of products in a high-paced manner, or the machines can be intermittent, producing a certain number of products at a time rather than a continuous stream with single or multiple cavity capabilities. The processes of plastic blow molding can be extrusion, injection or stretch blow molding depending on elements of the pre-form process. Injection blow molders are used in the manufacturing of smaller, precision-focused items while extrusion blow molders produce large quantities of simple, wide-necked products and handleware. Stretch blow molding is most commonly used in the production of plastic bottles, especially those for use in the beverage industry. Blow molders have the capacity to produce a broad range of product sizes from single-serve bottles to larger containers up to 30 liters in volume, with possible diameters of 24 inches.  Apart from high-volume production, minimal material wastage and the versatility of the process, other advantages to blow molders are the low costs of mold versus product output return and the durability of the products produced.

Blow Molders
Blow Molders
Blow Molders - Custom-Pak, Inc.
Blow Molders - Custom-Pak, Inc.






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