Core considerations for making resin process display models

Core considerations for making resin process display models

The production of resin process display models is a work that combines precision, creativity, and patience. Whether used for commercial display, industrial design validation, or collection appreciation, the final quality of the model depends on meticulous control over each production process. Here are some key considerations aimed at helping you systematically improve your production success rate and work expressiveness.

🎯   1、 Material selection and precise proportioning

Rational selection of resin types

It is crucial to choose the appropriate resin material based on the purpose and requirements of the display model. For example, epoxy resin is known for its high adhesion and low shrinkage rate, which can finely replicate mold details and is very suitable for producing high-precision miniature landscapes or precision parts; However, polyester resin has relatively low cost and good fluidity, which may be more suitable for large models that do not require extremely high precision

Strictly control the ratio and mixing

The ratio of resin to curing agent must be precise, which is the foundation for successful curing

Inaccurate proportioning can lead to quality issues such as incomplete curing (surface stickiness), weak or unstable physical properties, etc

It is recommended to use an accurate electronic scale for weighing. When mixing, it should be thoroughly stirred for at least 3 minutes and the sides and bottom of the container should be scraped to ensure complete and even fusion, but excessive stirring should be avoided to introduce too many bubbles

🔧   2、 Mold preparation and optimization

Carefully handle molds

The quality of the mold directly determines the final effect of the model. Silicone molds are widely used due to their excellent flexibility and demolding performance, which can replicate the details of complex prototypes and are not easily damaged during demolding

Before pouring resin, it is essential to ensure that the interior of the mold is clean, free from dust or oil stains

Apply appropriate release agent as needed to ensure smooth demolding and protect the model and mold.

Pay attention to the structure and rigidity of the mold

For precision models, the structural design and rigidity of the mold are very important

Unreasonable structures or molds with insufficient rigidity may deform during the production process, affecting the dimensional accuracy of the product

At the same time, a reasonable mold temperature control circuit design helps the mold maintain a uniform temperature, which is crucial for controlling the molding shrinkage rate and reducing deformation

💦   3、 Casting and curing environment control

Master pouring techniques

The speed and path should be controlled during pouring. It is recommended to slowly pour along the edge of the mold or at specific points to allow the resin to flow naturally and fill the fine areas, reducing the generation of bubbles. For complex molds, staged pouring or pressure injection systems can be considered.

Ensure stable curing conditions

The curing of resin is significantly affected by temperature. Low temperature environment can cause slow or even abnormal curing of resin

The poured mold should be placed in a well ventilated, dry, and temperature stable environment for curing. To avoid drastic fluctuations in ambient temperature, it may be necessary to create a warm curing environment or use heating devices in some cases

At the same time, a clean environment can prevent dust particles from falling on the uncured resin surface, which can affect the smoothness

👷   4、 Safety protection and standardized operation

Take personal protective measures

When handling chemicals such as resins and curing agents, it is necessary to wear safety equipment such as gloves, protective masks (to prevent organic vapors), and goggles to avoid direct skin contact with harmful substances or inhalation of volatile gases. If discomfort such as skin allergies occurs during use, the operation should be stopped in a timely manner and medical treatment should be sought

Maintain a safe working environment

The workplace should be well ventilated and kept away from open flames and high temperature sources. After use, tools and residual materials should be cleaned up in a timely manner to maintain a clean environment and reduce safety hazards

✨   5、 Post processing and quality improvement

Fine tuning and polishing

The resin model after demolding may have parting lines or small bubbles. Use sandpaper (gradually polishing from low to high grit), files, and other tools to carefully adjust and polish the surface to make it smooth and even. For the details, tools such as carving knives can be used for further carving to make the texture clearer

Scientific coloring and protection

Before coloring, it is usually necessary to apply a primer to the surface of the model to enhance the adhesion of the pigment

Coloring can be done by hand or spray according to your needs, and spraying usually results in a more uniform color effect

It should be noted that adding too much coloring agent may interfere with the normal curing process of the resin

After coloring, protective paint (such as gloss or matte paint) can be sprayed to protect the paint surface, enhance durability and aesthetics.

Pay attention to the maintenance and storage of finished products

Resin models should avoid prolonged exposure to direct sunlight, high temperatures, and humid environments to prevent fading, deformation, or aging

It is best to use dust covers or display boxes when storing and displaying to avoid collisions and scratches

Gently wipe with a soft cloth during cleaning.