Name: China Customized Rotational Closure Moulding Process Manufacturers, Suppliers, Factory - Jeepine
Brand: Jeepine
SKU: 224317631

Company Profile

Architectural design & planning cepteur sint occaecat cupidatat proident, taken possession of my entire soul, like these sweet mornings of Established in 2008,Guangzhou Jeepine Intelligent Compression Molding Machine Co., Ltd is one of the leading manufacturer of The High-compacity Cap Compression Molding Machine ,dedicated to High-efficiency and cost-saving compressing molding technology.especially for the bottled water cap compression molding,beverage cap moulding,dairy cap molding,liquor cap molding,condiment cap molding,cosmetics closure molding and pharmaceutical rotary closure molding machine. Jeepine are leading the advanced compression technology for plastic closures in China,with the aim of creating value for customers.
We have a professional R&D team,CAE academicians , overseas returnees ,doctors and masters who dedicated to make a superb design for caps and research the newest technique to create the value for customers. Whatever platform strategy, mature technology and innovative solution would be brought to you, optimal combination possibilities for high efficiency,high capacity,high stability and offered you the right solution as you need, enhancing your benefits.

Why Choose Us

One-stop Solution

We're committed to quality and concrete actions. That means we always deliver solutions in a professional and practical way.

Rich Experience

Established in 2008, We have more than 10 years rich experiences in cap compression molding machine. Up to now,We're obtained nearly 100 national patents,in science&Technology"and has winned the certifications of UL,ISO9001 :2015 and TUV.

Professional Team

We have a professional R&D team,CAE academicians , overseas returnees ,doctors and masters who dedicated to make a superb design for caps and research the newest technique to create the value for customers.

24H Online Service

You can contact us about pre-sale, in-sale and after-sale services, we will give you a very satisfactory answer, and we serve you online 24 hours a day.

Comprssion Thermoforming Machine

Plastic Cap Printing Machine

Bottle Caps Making Machine

Compression Molding Machines

Compression Moulding Machines

Cap Compression Machine

Plastic Bottle Cap Machine

Plastic Closure Making Machine

Compression Moulding

What is Rotational Closure Moulding Process?

Rotational molding, commonly referred to as "rotomolding", is a plastic casting technique used to produce large hollow, seamless, and double-walled parts. It is a three-stage process that involves a mold on a rotating frame, a heating chamber, and a cooling chamber. Molds for the rotomolding process are specially designed and are capable of producing single and double wall products.
Rotational molding is a non-pressure molding process, which makes the toolings of the molds less expensive since they do not have to endure the stress of being pressured. The sizes for rotationally molded products are limitless since the molds and equipment are capable of creating very large complex plastic shapes. There are also few restrictions when it comes to part design, giving the designer freedom to add complicated details.

Benefits of Rotational Closure Moulding Process

Low-cost tooling:

Low operating pressures allow rotomold tooling to be crafted from low-cost metals such as aluminum.

Consistent wall thickness:

The constant rotation of the mold coats the walls evenly during both the heating and cooling processes.

Double-wall construction:

Complex double-walled open containers can be produced without secondary processing.

High durability:

Parts are molded as one solid piece, eliminating the need for joining techniques such as welding and joint fabrication which creates weak spots.

High stability:

The molding material isn't exposed to external pressure, increasing its stability and reducing the risk of defects in the finished part.

High strength:

Rotomolding creates thicker corners, reducing the risk of failure in these stress-concentration points.

Process of Rotational Closure Moulding Process

1.Fill the hollow mold with powdered plastic resin.

2.Initiate bi-axial rotation of the mold.

3.Transfer the rotating mold into an oven.

4.Maintain the rotation while the resin melts and evenly coats the inner walls of the mold.

5.Cool the rotating mold to allow the resin to harden and take the desired shape.

6.Stop the rotation and open the mold.

7.Carefully remove the finished part from the mold.

Certifications

Our Factory

Jeepine CCM has been accepted by many well-know and market-leading beverage manufacturers such as Wuliangye,Mengniu,COFCO and HuiYuan.Moreover,Jeepine CCM also entered the market of southeast Asia,the middle east,Africa,South Korea,Japan,US,etc.,Contributing to various packaging industry,including beverage,pharmaceutical,cosmetics and daily commodities.

factory look

FAQ

Q: What are the advantages of rotational molding?

A: Rotational moulding machine costs are low compared to other processes and the investment required is small. There is great production flexibility with the process. There is almost no limit to the size of products and several different products can be moulded at the same time.

Q: Why is rotational moulding used?

A: Rotomolding is often used for parts that require high-quality finishes, uniform wall thicknesses, and high stability. Features such as inserts and spin weld attachments can be incorporated directly into the rotomold and foaming can be used to create thermal insulation and stiffness.

Q: Why is rotational moulding better than injection moulding?

A: Because rotational molding produces a more even application of the plastic material, the resulting product is more flexible and durable. Meaning, it's less likely to crack in extreme temperatures or when beaten up by waste handlers on their runs.

Q: Is rotational moulding sustainable?

A: The process of rotomoulding is an environmentally-friendly one. No chemicals or dangerous toxins are released during production. There is also less material wastage compared to manufacturing with other materials, like metal or concrete.

Q: What is the principle of rotational moulding?

A: The principle of rotational molding of plastics is simple. Basically the process consists of introducing a known amount of plastic in powder, granular, or viscous liquid form into a hollow, shell-like mold.

Q: What is the best material for rotational molding?

A: Polyethylene (or polythene, as it is also known) is by far the material most used for Rotational Moulding. It has ease of processing, good low temperature impact strength and excellent chemical resistance.

Q: What is the temperature for rotational molding?

A: Temperatures ranging from 250 °C – 288 °C (482 °F – 550 °F) are recommended. The best results can be obtained when the Peak Internal Air Temperature (PIAT) is between 255 °C – 275 °C (491 °F – 527 °F). Due to excessive heat loss, some rotomolding equipment requires higher air temperatures.

Q: What are the parameters of rotational molding?

A: Critical parameters of the rotational molding process are heating time, cooling rate, and rotation ratio. These settings determine the mechanical properties and dimensional quality of the parts to be produced.

Q: Why do some rotational molds have vent holes?

A: Rotational molding produces strong, hollow plastic parts. Sometimes, holes or vents are required to equalize the pressure on the part's inner and outer walls during the heating and cooling of the mold.

Q: What is the draft angle for rotational molding?

A: Draft angles are primarily used to release the part from the mold. A simple rotomolded part like cylindrical tank may not require draft because the plastic naturally shrinks away from the mold as it cools. Some heavy textures require 3 degrees of draft while male sections and undercuts may need 5 degrees or more.

Q: What are the possible causes of low impact strength in rotationally molded parts?

A: Shrinkage and Deformation: Residual stress during cooling can cause the plastic to shrink and deform. Proper cooling methods and structural design can mitigate these defects. Reduced Impact Strength: Factors like heating temperature and time, cooling speed, particle size, mold, and material influence impact strength.

Q: What is meant by rotational casting?

A: A method for molding hollow plastic objects by placing finely divided particles in a hollow mold that is rotated about two axes, exposing it to heat and then to cold.

Q: What is the technique of rotomolding?

A: Rotomoulding is a casting technique in which powder is nearly always used rather than granules, meaning the material must be ground. Polyethylene is relatively easy to grind at ambient temperatures. For comprehensive information on the different materials that are used during rotational moulding click here.

Q: What is the mechanism of rotational molding?

A: The rotational molding process is a high-temperature, low-pressure plastic-forming process that uses heat and biaxial rotation (i.e., angular rotation on two axes) to produce hollow, one-piece parts.

Q: What is the primary purpose of rotational molding?

A: The primary purpose of rotational molding is to produce parts with high-quality finishes, uniform wall thicknesses, and excellent stability. This manufacturing process allows inserts and spin weld attachments to be directly added to the rotomolded product.

Q: What is the history of rotational molding?

A: The history of rotational molding, or roto molding, can be traced back to 1855. British manufacturer R. Peters utilized biaxial rotation and heat to produce hollow metal artillery shells and other vessels. The process was later adapted for plastics around 1950 for manufacturing doll heads. Since then, roto molding has evolved and expanded to become a common and versatile method for producing plastic products.

Q: What is another term for rotational molding?

A: Rotational molding is also known as roto molding, roto casting, or roto mold. In all cases, the process is the same: plastic powder is put into a mold designed to rotate on multiple axes. When heated, the plastic melts and coats the interior surface of the mold to form the desired shape. Rotomolding is renowned for its affordability and capacity to create sizable plastic components with uniform wall thickness.

Q: What is the lifespan of rotational molding products?

A: Rotational molding products' lifespans can vary depending on variables like application, material, and environmental conditions. However, rotational molding products generally last for a very long time with proper use and maintenance.

Q: Is rotational molding expensive?

A: No. Rotational molding can be considered an affordable process compared to other molding techniques. The initial investment in rotational molding machines is relatively low. The inherent production flexibility also lets you mold large products or multiple products simultaneously.

Q: What is rotational molding?

A: Rotational molding is an innovative manufacturing technique that starts by filling a heated mold with plastic material. Hollow components are formed by rotating the mold around two perpendicular axes. This causes the molten plastic to spread evenly and stick to the mold's interior walls. A uniform thickness throughout is ensured by the mold's continuous rotation during both the heating and cooling phases, preventing any unwelcome sagging or deformations. This technique can produce hollow plastic products with consistent wall thicknesses, intricate geometries, and exceptional strength.

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