Resin Sand Casting: Pros & Cons Decoded

Advantages of Resin Sand Casting

Simple process, short production cycle

Resin sand casting process has significant advantages over other casting processes. Its fast molding rate, without the need for drying and repair operations, which greatly reduces the casting deformation that may be caused by baking and repair. The sand has good fluidity and does not need to be compacted, which reduces damage and deformation of the core box. These features make the production cycle and delivery time of castings much shorter.

Wide Range of Application

Resin sand casting can be widely used in the production of castings of various specifications and models. It is not subject to the limitations of part shape, complexity and alloy type, and it can show its flexibility when producing complex shaped castings. Whether large or small castings, resin sand casting is capable of. At the same time, the process is suitable for large-scale batch production of castings, and low processing costs, for enterprises to reduce production costs and improve market competitiveness.

High Molding Precision and Good Surface Quality

Resin sand casting in the production process, the casting mold has high hardness and good dimensional stability, to ensure that the castings produced are dimensionally stable, high molding accuracy. Its surface quality is good, not easy to appear scar and burr and other surface defects. Resin sand mold has high temperature resistance, good air permeability and thermal stability, which is conducive to the realization of the casting organization is close. The casting surface produced using resin sand process is relatively smooth, with clear angles and high dimensional accuracy, which can greatly reduce the casting defects such as sand holes, porosity, cracks, etc., and provide a reliable guarantee for casting high-standard and stringent requirements of the casting products.

Resin Sand Casting Shortcomings

High Material Cost

Resin sand casting requires the use of resin, hardener and other additives, these materials are usually more expensive than traditional sand casting materials. For example, the resin sand resin price is generally around 10,000 yuan / t, casting costs have a greater impact. At the same time, due to the uneven production equipment of manufacturers, the quality of the resin produced also varies greatly. If you choose a poor quality resin, not only affect the quality of resin sand, resulting in increased casting scrap, but also increase the amount of resin added, the direct result is to increase casting costs.

High Equipment Cost

Resin sand casting requires specialized equipment, such as sand mixer, core shooter, pouring machine, etc., purchase and maintenance costs are high. The quality and performance of these equipments directly affect the productivity and casting quality of resin sand casting. The price and quality of equipment from different manufacturers vary greatly, and enterprises need to comprehensively consider their own production needs and economic strength when choosing equipment.

Longer Production Cycle

The production cycle of resin sand casting is usually longer than traditional sand casting because of the need to wait for the resin to cure, which may take hours or even longer. For example, after a resin sand model is made, it takes some time for the resin to cure before the operation of pouring metal can take place. If the curing time is not properly controlled, the quality and productivity of the casting may be affected. In addition, temperature and humidity have a large impact on the hardening rate of the resin, further extending the production cycle.

Prospects for the Application of Resin Sand Casting Process

With the continuous improvement of the market requirements on the appearance quality of casting products, the advantages of resin sand castings in terms of quality have been increasingly emphasized, and its process is bound to be rapidly developed and popularized.

First of all, resin sand castings have the advantages of high dimensional accuracy, clear external contour, smooth surface and dense organization, which can meet the market demand for high-quality castings. In the automobile, machinery manufacturing and other fields, the casting precision and surface quality requirements are increasingly high, resin sand casting process can be well adapted to these needs.

Secondly, from the perspective of the global market, the resin sand casting industry is developing rapidly. the global resin sand casting revenue has reached a certain scale in 2023, and is expected to grow further by 2030. The Asia-Pacific region will play a more important role in the global market, and China, as an important market in the Asia-Pacific region, its CAGR is also showing a good development trend. Continuous competition among the major resin sand casting producers in the global market is driving the industry. In terms of product type, alkali phenolic resin sand casting holds a significant position and its share is expected to increase further by 2030. In terms of applications, the demand for resin sand castings in the automotive industry is growing, with a sizable CAGR over the next few years.

In addition, the continuous development of resin sand casting technology also provides support for its application prospects. For example, the development of sequential solidification technology, rapid solidification technology, composite material preparation solidification technology and semi-solid casting technology provides more possibilities for resin sand casting. These technologies can improve the performance and quality of castings and meet the special needs of different fields.

In short, with the continuous growth of market demand and the continuous progress of technology, the application of resin sand casting process has a broad prospect and will certainly play a more important role in the future casting field.

Conclusion 

EATHU Foundry is a well-known company specializing in resin sand casting. With our advanced resin sand casting technology, we provide high-quality castings for customers all over the world.

Our advantages are: excellent craftsmanship, short production cycle and high efficiency, and the ability to cast a variety of complex precision castings with high molding accuracy and good surface quality. We strictly control the sand temperature, curing agent dosage and other process points to ensure stable casting quality. At the same time, we optimize the mold design according to the characteristics of resin sand to further improve the casting quality.

We have a professional team, from research and development to production, all-round to ensure product quality and service level, committed to meet the needs of automotive, aerospace, machinery manufacturing and other industries, and constantly innovate and develop, is your trustworthy casting partner.