Common Challenges in Rotomolding Mold Production and Solutions

Rotomolding is a unique process for manufacturers to produce hollow non-gasoline items that are typically found in our daily lives, including tank toys, large water tanks, and colorful traffic cones. This measure is very helpful as it helps to produce robust and lightweight articles. Unfortunately, mold making for Rotomolding Product can be difficult and even confusing. There are many problems that a mold makers can face while creating these molds. These issues can be rectified with good tips and tricks luckily, there are a lot of them that guide you through. So here are some solutions to common problems faced on rotomolding mold manufacturers;

Keeping Molded Parts Straight

There are occasions that the final rotomolding mold product shape may be warped or misalign during the forming process. This can be due to the mold not being level or due to too much heat or cold during the process. So how do you keep the molded parts straight and looking good?

The most significant way is to make sure you are pouring your plastic in a mold that is perfectly level. You can get a tool called a spirit level that will help you determine if the surface is flat. Getting this step right is crucial. You can also keep the mold at a consistent temperature using heating lamps or cooling fans. Maintaining a constant temperature ensures that the plastic settles correctly. Another helpful technique is getting a spinner arm. As the plastic is poured, this tool rotates the mold to evenly distribute the shape of the plastic to ensure that the final product doesn't come out skewed or distorted.

Rotational Molds: Fish Eyes and Sinking

When creating a rotomolding mold, there is sometimes an area where the plastic can sink. This can occur from uneven cooling or not enough plastic being utilized. So, what do you do when you identify this sinking problem?

First, lower the temperature of the mold or, leave it in the oven for a longer period. It can make the cooling process more uniform and promotes sinking. You could also consider using more plastic material. Properly fill the mold to the desired height for each product so that the end product comes out evenly shaped. The exact part geometry can also be modified by businesses using proper venting or gas-assist technology to allow the plastic to fill every portion of the mold accurately. These processes allow the plastic to reach all nooks and crannies, which is what makes a finished product.

How to Maintain Uniform Wall Thickness

The wall thickness is very consistent for the product which is one of the most important requirements when designing and producing a roto molding mound. It means the plastic thickens the same anywhere in the object. But how do you make this uniformity?

A balanced mold in both vertical and horizontal measure is required to ensure even wall thickness. Ensure the cavity of the mold gets evenly filled with the plastic. You also have to be careful about the speed at which the oven moves, ensuring that the plastic heats evenly from one side to the other. The products should be move forward with an even flow and constant pace, to guarantee the same wall thickness of all parts, which is essential for the quality.

Correcting Mold Stress Cracking Problems

Stress cracking is also more common when dealing with Rotomolding Steel Mould, and can be a problem for mold makers. This problem occurs when the plastic is placed under excessive pressure or stress, resulting in cracking or breaking. So, what steps can you take to avoid issues with stress cracking?

However, one way to overcome this is selecting the appropriate plastic material to create your mold. Not all plastics are created equal, as some are stronger than others, and some are made to last longer than others. Choosing the right one for your project, that’s crucial. You can also alter the mold design, adding additional ribs for support or reinforced areas that are most prone to break. Also, do your best to not have sharp corners and edges in your mold design, as these can create weak spots in the plastic.

Matos: Getting it Right in Rotomolding Molds

The quality of the rotomolded products is heavily reliant on consistency in mixing. This means that if colorants or other materials are added, they should be uniformly dispersed within the plastic. But how do you ensure this is done right?

To achieve even mixing, one common method is known as mix and dispense. What this means is that you first mix the plastic and colorant together very well and then add that to the mold. Once mixed, an automated machine dispensed the mixture into this mold. This action helps to keep the pigment and materials evenly distributed, an important part of producing a quality product. Furthermore, you need to make sure that you are always checking the ratio of the plastic to the additives so that you do not run into any mixing problems.

Thus, although creating Rotomolding Steel Mould does indeed have some frequently faced obstacles, it can ultimately become significantly easier to generate a winning mold when one uses the proper methods and the appropriate advice. Using the right techniques for keeping molded parts straight, addressing sink issues for rotational molds, ensuring uniform wall thickness, eliminating issues with mold stress cracking, and evenly mixing all meet the goal of producing high-quality products. Young Mould is a company certified in mold design and manufacture, with a dedicated team to work with you on any difficulties on the mold production process.