Share this page on

Dip Molding

IQS Directory provides a comprehensive list of dip molding companies and suppliers. Use our website to review and source top dip molding companies with roll over ads and detailed product descriptions. Find dip molding companies that can design, engineer, and manufacture dip moldings to your companies specifications. Then contact the dip molding companies 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 new articles. Whether you are looking for manufacturers of dip molded plastics, dip molding rubber, dip molding coatings, or customized dip moldings of every type, this is the resource for you.

Related Categories

We are plastic experts, and we offer many services for our customers, including dip molding and a whole lot more. No matter who our customers are, we will work our hardest to ensure that you are fully satisfied with our products. We serve a huge variety of customers, and can find the ideal product to use for any industry. Find out more when you give us a call today!
Read Reviews
When it comes to dip molding, experience and quality are a must. There are many ways to manufacture molded plastic parts, but our experience and research has led us to one of the most efficient and cost-effective methods in the industry today. Find out how we can help you when you visit us online today! We would love to start manufacturing your plastic products!
Read Reviews
Let Precision Dip Coating show you what expert dip molding looks like. We match any color and offer great services to meet your specs for decorative and protective coatings and soft plastic parts. Send us your drawings or samples today for highly efficient, low cost plastisol and fluid bed powder coating; hot dip, cast and rotational molding. We may even have the tooling in stock already!
Read Reviews
Carlisle Plastics is a dip molding plastics manufacturer offering end caps, plastisol paint masks, thread protectors, tube closures, protective caps and decorative caps. We provide a wide selection of standard sizes and colors. Custom colors as well as nonstandard shapes and sizes are a specialty. We are ISO 9001 certified. Our mission is to provide quality products and services.
Read Reviews
Harman has 50 years of experience in manufacturing dip molding with the materials, equipment and flexibility to rapidly prototype. We provide standard and custom designed high-temp paint masks, caps, grips and plugs. We have quality plastic dip moldings for a variety of applications and markets. Contact us today to learn more information!
Read Reviews
More Dip Molding Companies More Dip Molding Companies GO TO TOP
Industry Information
View A Video on Dip Molding - A Quick Introduction

Dip Molding

Dip molding is the process of manufacturing plastic parts, products and components by dipping a mold into liquid plastic and allowing it to set before removing it from the plastic. The process is common in manufacturing items for the consumer, medical, electronic and retail industries, producing parts such as plastic caps, plastic plugs and other sorts of plastic closures, handles and grips for appliances, sports and recreational equipment, gloves and small plastic products.

Dip molding is an important plastic product formation process. Dip coating is a similar service that is also offered by many dip molders that partially or fully coats products with a protective material. Dip coaters apply coatings to products in the same method as dip molding, by dipping them in liquid plastic. Plastic coatings are typically polymer coatings or vinyl coatings. The most common however are PVC coatings and plastisol coatings although other materials also used in dip molding include latex, neoprene, urethane, epoxy etc. Plastisol, a vinyl compound, is already a liquid at room temperature and therefore is an ideal material choice for the process of dip molding as it requires even less energy to undergo manufacturing. Plastisol also hardens permanently once heated which is ideal for the manufacturing of many plastic products. Products used for outdoor applications use UV coating to protect products and surfaces from damaging ultraviolet rays.


During the process of dip molding, the polymer or vinyl is kept in a liquid state and heated if necessary to bring it to optimum viscosity. Two variables to be considered that can affect both the quality and appearance of the product are the temperature of the mold and the temperature of the material. Next, it is important to determine a consistent speed for dipping, or immersing, and withdrawing the mold from the liquid. Mandrels, or molds, are heated to ensure the adherence of the molten polymer to the surface of the mold. The mold is slowly lowered into the liquid plastic allowing for uniform surface coverage of the mold and even wall thickness. The longer a mold is allowed to be immersed in the liquid for, the thicker the wall of the product will be, and so it is important to consider this manufacturing aspect before undergoing dip molding. Once the desired "dwell time" has been reached, the mold is slowly removed from the liquid and allowed to harden. The mold has to be removed slowly and consistently to ensure a smooth finish on the surface, and to prevent wall thickness irregularities. Some polymers, such as plastisol, are further heat treated in an oven to fully set the mold. The polymer is then stripped from the mandrel and moved on to secondary finishing if necessary. However, dip molded products are relatively precise and do not often require extra finishing. A broad range of parts and products are made from this method including pump grips, plastic bags, handle bars, plugs and numerous small plastic parts.

Dip coating is a very similar process to dip molding, but it is used to provide a protective layer on the surface of an existing part. Some products and parts may be fully coated, such as plastic coated fences, wire forms or racks, while others are half coated to serve as grips, tool handles or electrical connectors. The purpose of dip molding or dip coating is both decorative and protective. For example, covering the handles of many everyday objects improves the comfort and grip, and can add an element of design to an object. Plastic can be manufactured in many different colors and by using different techniques, texture, hardness and surface appearance of the coatings can all be adjusted aesthetically. However, the more important reason for dip coating is its protective and insulative properties. For example, electrical wires and components such as jumper cables or extension cords are dip coated to provide electrical insulation. Plastic coating also improves a product's noise reducing and vibration dampening properties, adds excellent thermal insulation and eliminates the needs for deburring as it reduces sharp edges on metal parts. Coating around wires and fences improves the corrosion resistance of the products and extends their lifespan, especially when used outdoors.

There are many advantages to dip molding and dip coating and these processes are used commonly in plastics manufacturing. Dip molding is suitable for fast prototyping due to its short lead times and unlike other manufacturing methods, there are minimal setup costs because both the equipment and process are basic. Labor costs are low as the process is almost entirely automated, and as the process is straightforward, there are relatively high turnaround times. The parts being made are highly flexible and malleable and therefore even the most complex parts are able to be stripped easily from the molds. Dip molded products or coatings require little or no secondary processing due to the nature of dipping and removing, and this ensures that there is minimal material wastage during the process. In addition to providing a colorful and attractive finish to various products, plastic coatings provide corrosion resistance, scratch and wear protection and a smooth, tactile grip for safe and easy handling. A range of wall thicknesses are achievable through using controlled temperature, dip speed and time, and the rate at which a piece is removed from the plastisol.


plastic dip molders
dip moulders
Image Provided By Innovative Coatings Inc
 Image Provided By U.S. Plastic Coatings Corporation



  • Cast molding involves dispensing plastisol into a mold, placing it in an oven and then heating it so the plastisol fuses into the finished part. This process is capable of producing multi-colored parts.
  • Cold dip coating is used mostly for thin coatings of plastisol. In this process, the object is dipped in plastisol without preheating, and then placed in a heated chamber.
  • Dip coating is the process of submersing an object in a tank full of coating material.
  • Dip molding is a thermal process by which metal molds are dipped and coated.
  • Hot dip coating is the process in which an object is heated, dipped in plastisol and then placed in a heated chamber where fusion takes place.
  • Plastic caps are plastic covers formed through the process of dip molding.
  • Plastic dip coating is a process in which metals are coated with plastic.
  • Plastic plugs are plastic caps formed through the process of dip molding.
  • Polymer coatings act as a protective covering in corrosive environments by enhancing the abrasion resistance of the component's surface.
  • Rotational molding is a method that involves placing a limited amount of plastisol in a mold and then rotating it as heating takes place so the liquid is equally distributed. This is used to create hollow products.
  • Saturation coating is the method of completely immersing an object in liquid plastisol and then letting it gel so that the object is totally covered.
  • Vinyl coatings are wear resistant vinyl compounds that undergo dip coating processes to form rigid smooth or textured protective coatings over substrate surfaces, typically metals.


Dip Molding Terms

Air Release - A test that determines the ease of removing air bubbles from plastisol.
 
Automatic Rack Transfer System (ARTS) Station - Used mostly with rotary dip molding machines. The advantage of this system is that it raises the amount of operator positions for reloading and unloading without taking the racks offline, and also permits extra positions for cooling and priming metal parts for coating preparation or for automatically lubricating mandrels.  
 
Blister - An irregularity on the surface of fused plastisol, caused by the contamination of water, air or solvents.
 
Blower - A high temperature air mover that raises turbulence and heat transfer to the mandrel or tool in the preheat oven, also used in the cure oven to accelerate curing and lower heat stratification.
 
Brookfield Viscosity - A measure of the viscosity of plastisol.
 
Closeable Dam - A device in the dip tank that completely stops the flow of plastisol over the weir during the dip cycle. Its use requires synchronization with the dip tank agitation and recirculation pump cycle.
 
Deaeration - Removal of trapped air from plastisol by using a vacuum during mixing or later in the process.
 
Dip Line - The uppermost edge of the dipped plastic coating.
 
Elastomer - A material that upon being stretched to twice its length at room temperature will immediately snap back into place.
 
Elongation - A measure of how far fused plastisol can be stretched without breaking.
 
Fillers - Added materials used to reduce costs or modify the finished product.
 
Gelatin - When plastisol becomes immobile after its liquid has been absorbed by the resin.
 
Leaching - When plastisol travels out of fused or partially-fused vinyl film.
 
Mandrel
- Forms the internal shape of a dip molded part, made of steel, aluminum or other alloys. Multiple mandrels are usually mounted to a bar that is placed into a master rack or mounted directly on the arm of a machine.
 
Master Rack - A frame of aluminum or steel with pins or indentations symmetrically positioned for retaining adapter bars. Typically, the designs of master racks are for specific dip molding machines and can be used with many similar bars of tooling.
 
Organosol - A plastisol into which solvent has been added.
 
Overhead Dip Station - Used for multiple dips or several colors or grades in a constant process. The two-axis design removes preheated racks of parts or tools from the machine by using the vertical axis, and then moves the parts laterally to any of up to four dip tanks.
 
Pawl - Overhead dip stations use this J-shaped gripper to grab the rack of tools to be dip coated. Typically these are used in pairs.
 
Plasticizers - Solids with low melting points or liquids with high boiling points that are used to give flexibility to PVC resins.
 
Plastisol - A liquid substance made of a blend of polyvinyl chloride (PVC) resins and liquid plasticizers. It is a thermoplastic that can be used to produce coatings or moldings through a heat process.  
 
Profile Dripping - Uses programmed positions, speeds and dwell times to alter the dip speeds of a tool or mandrel. This is for controlling the drip and the thickness, and may be used with traditional moving tank designs or with overhead dip systems.
 
PVC Dispersion Resin
- Small particles of PVC that are mixed with plasticizer to form plastisol.
 
Severs Viscosity - A measure of the viscosity of plastisol.
 
Specks - Dark specks in fused plastisol of burnt resin caused by overheating.
 
Strip Heater - An electric heater in most cure ovens that is typically mica insulated. Airflow over these heaters moves the heat from the strip heater to the plastic coating to be cured.  
 
Surfactant - An agent that is used in plastisol to reduce its viscosity and enhance air release.
 
Tubular Heater - An electric heater with a high surface temperature, typically in the preheat section of the machine. Air flow as well as infrared radiation over the elements moves the heat to the mandrel or tool to be coated.
 
Viscosity Aging - The tendency of plastisol to become more viscous while in storage.

 




GO TO TOP