The production of resin refrigerator magnets is a systematic process of transforming creative designs into physical products, involving multiple stages such as material preparation, mold making, molding and casting, post-processing, and quality inspection and packaging. Each stage is interconnected, and the precision of process control directly affects the integrity of the finished product's form, surface quality, and performance. Therefore, rigorous processes and standards must be followed in large-scale production.
The process begins with design and drawing confirmation. This stage requires clarifying the product's main shape, size proportions, detailed patterns, and magnet embedding positions, and drawing parting lines and structural cross-sections to predict demolding feasibility and magnet fixing methods. The design must balance aesthetic expression with molding process limitations, avoiding sharp angles, overhanging structures, or overly complex cutouts to reduce the difficulty of mold making and molding.
Then comes the mold making stage. High-temperature resistant, low-shrinkage silicone or polyurethane resin is commonly used for mold making to ensure replication accuracy and service life. A master mold is prepared based on the parting design, and then the working mold is formed through casting or coating. The mold wall thickness should be uniform, the parting surface should be simple, and draft angles and locating pins should be set when necessary to ensure clear outlines and neat edges of the molded parts. For three-dimensional or multi-layered products, combination molds or sliding molds should be used to achieve precise alignment between components.
After the mold is ready, prepare and proportion the materials. Select environmentally friendly unsaturated polyester or epoxy resin, strictly weigh the A/B components according to the manufacturer's recommended ratio, and mix them in clean containers to avoid introducing impurities. To reduce air bubbles, stir at low speed during mixing and perform vacuum defoaming or static defoaming treatment before pouring. Control of ambient temperature and humidity is also crucial to prevent affecting the curing reaction speed and molding quality.
Molding and pouring is the core process. Pour the prepared resin into the preheated mold at a uniform speed, supplementing with slight vibration or pressure pouring if necessary to ensure complete filling and full details. For multi-color layered or special effect styles, it is necessary to grasp the curing time window of each layer, pour sequentially, and avoid color bleeding. The curing process involves setting appropriate temperatures and times based on the resin type to ensure thorough hardening without cracks or warping defects.
After molding, the post-processing stage begins. First, burrs and excess material are removed, followed by gradual wet sanding to achieve a smooth surface. Matte, glossy, or material-mimicking coatings are applied according to design requirements, and epoxy resin or transparent overlay processes are used to enhance the three-dimensional effect and weather resistance. Magnets are embedded using a special high-strength adhesive and properly sealed to prevent magnetic attenuation and corrosion. Quality control at this stage focuses on adhesion strength and appearance consistency.
Finally, quality inspection and packaging are completed. Inspection items include dimensional accuracy, magnetic strength, surface defects, color stability, and structural integrity. Qualified products are categorized by theme or batch, packaged in pressure- and moisture-proof packaging, and labeled accordingly to ensure no damage during transportation and storage.
In summary, the production process of resin refrigerator magnets encompasses design, mold making, material preparation, casting, post-processing, and quality inspection and packaging. It is essential to maintain coordination and stability in material properties, process parameters, and operating procedures. Only in this way can we achieve the output of high-quality products that combine exquisite design, reliable performance, and lasting aesthetics, providing a solid guarantee for the sustainable development of this cultural and creative product category.
