大丸工業 List of Products and Services

Daimaru Industrial Co., Ltd. has been engaged in the manufacturing of various valves and bronze alloy sand castings since its establishment in 1973. In recent years, the global economy has progressed towards globalization, forcing us into global competition. To survive in this competition, we will not only focus on improving manufacturing technology but also strive for innovation in customer development. We kindly ask for your continued guidance and encouragement. 【Business Activities】 ■ Casting, processing, polishing, and assembly of faucet parts, piping connection parts, general valves, and marine valves. *For more details, please refer to the PDF document or feel free to contact us.

• valve
• Piping Materials
• Processing Contract

This document provides fundamental knowledge about castings that you may feel hesitant to ask about. Castings are items made by melting metal, pouring it into a mold, and allowing it to cool and solidify. These are also referred to as cast products, and there are many cast products in our everyday lives. Please make use of it. 【Contents (excerpt)】 ■ Trivia about castings ■ Manufacturing process of castings ■ History of castings ■ Basic properties of copper alloy castings ■ Metal melting *Currently offering the "Fundamental Knowledge of Castings You May Hesitate to Ask About" for free. You can view it immediately via "PDF Download." *For more details, please refer to the PDF document or feel free to contact us.

• Other metal materials

This document contains information about casting TECHNOLOGY techniques. It provides clear explanations on topics such as "the viscosity of molten metal," "three-dimensional structure strainers," and "toward the practical application of three-dimensional structure strainers." Please take a moment to read it. [Contents] ■ Viscosity of molten metal ■ Three-dimensional structure strainers ■ Toward the practical application of three-dimensional structure strainers ■ Company information * Currently, we are offering the [TECHNOLOGY technical information] for free. You can view it immediately via "PDF download." * For more details, please refer to the PDF document or feel free to contact us.

• filter

Daimaru Industrial Co., Ltd. has been engaged in the manufacturing of bronze castings, primarily focusing on various types of valves, since its establishment in 1973. In 2004, we established a subsidiary, Dalian Daimaru Industrial Co., Ltd., in Dalian, China, providing a wide range of products to domestic customers. We respond to various customer needs, including small-lot production and the creation of original products, under a consistent system from mold design to casting, machining, assembly, inspection, and shipping. 【Strengths of Daimaru Industrial】 ■ Well-equipped facilities and production capacity - Maintaining a production capacity of 200 tons of product weight per month ■ Abundant production track record - Long-standing transactions with major housing equipment, various valve manufacturers, and equipment manufacturers ■ Reliable technology and quality - Thorough quality control at each stage to stabilize quality *For more details, please refer to the PDF document or feel free to contact us.

• Casting Machine
• Contract manufacturing

Our company established Dalian Daimaru Industrial Co., Ltd. in July 2004, creating a production base in China. By consistently handling everything from casting, processing, polishing, and plating (outsourced) to the assembly of valves, we are able to respond with short delivery times and low costs. Additionally, our partition valves have obtained JIS B 2011 (bronze valve) certification, and our factory is certified with ISO 9001 and ISO 14001. With many years of extensive manufacturing experience and know-how, each staff member is committed to thorough quality control. By monitoring each process in real-time and coordinating closely, we ensure reliable manufacturing. 【Features】 - We have established a production base in China. - By handling everything up to assembly, we can respond with short delivery times and low costs. - Our partition valves have obtained JIS B 2011 certification, and our factory is certified with ISO 9001 and ISO 14001. - Each staff member is dedicated to thorough quality control. - We monitor each process in real-time. *For more details, please refer to the PDF document or feel free to contact us.*

• Casting Machine
• Contract manufacturing

Since our establishment in 1973, we have responded to various customer requests regarding quality, cost, and delivery time, building trust as an invaluable partner to our clients. We can accommodate a wide range of materials, including CAC406, 407, 408, 901, and 905. Our customers have praised us for the beautiful appearance and internal casting surfaces compared to other companies. We have a track record of producing large-diameter water meters of 75 and 50, as well as partition valves up to 4 inches. 【Features】 ■ Responding to various requests regarding quality, cost, and delivery time ■ Wide range of materials available, including CAC406, 407, 408, 411, 901, and 905 ■ Proven production of large-diameter water meters of 75 and 50, and partition valves up to 4 inches 【Overseas Production】 ■ Materials include CAC406, 407, and 905 (bronze) ■ Different materials can be handled by subcontractors, including FCD + aluminum assemblies, SUS13 stainless steel, and zinc die-cast, among various other materials. ■ We also accommodate polished products, plated products, and processed items. *For more details, please refer to the PDF document or feel free to contact us.

• Casting Machine
• Contract manufacturing

Our company maintains a production capacity of 200 tons of melting weight and 100 tons of product weight per month. We can accommodate relatively large products with a mold frame size of 600(W)×400(L)×130(H)/130, and we can produce items ranging from large ones with a flange diameter of φ220, a total length of 320mm, and a product weight of 25kg, to smaller items. We respond to various customer needs, including requests for small lot orders and the production of original prototypes. We conduct thorough discussions during the prototype stage to achieve mass production of the highest quality that meets the usage environment. 【Features】 ■ Maintains a production capacity of 200 tons of melting weight and 100 tons of product weight per month ■ Capable of producing items ranging from large ones with a flange diameter of φ220, a total length of 320mm, and a product weight of 25kg to smaller items ■ Responds to various customer needs ■ Achieves high-quality mass production that meets the usage environment *For more details, please refer to the PDF document or feel free to contact us.

• Casting Machine
• Contract manufacturing

We would like to introduce the manufacturing process of castings at Daimaru Industrial Co., Ltd. We carry out the entire process from order and estimation, molding, pouring, breaking, cutting and deburring, shot blasting, to finishing and inspection, all the way to delivery. In the "pouring" process, where molten metal is injected into the mold, a technique is required to pour it quietly and quickly to avoid trapping air. "Deburring" is an important task related to finishing within the process. It plays an indispensable role in achieving better quality. 【Features】 ■ We respond reliably to each of our customers' requests. ■ We accommodate needs for high-difficulty product manufacturing and small lots. ■ We actively respond to challenging requests. ■ We provide consistent support from casting to assembly. *For more details, please refer to the PDF document or feel free to contact us.

• Casting Machine
• Contract manufacturing

The three-dimensional structure strainer, unlike two-dimensional structure filters, eliminates the straight flow of molten metal, resulting in a static flow effect. However, using a three-dimensional structure inevitably leads to temperature drops and flow rate drops, which can be fatal for copper alloys with low pouring temperatures. Therefore, our company has reduced the thickness of the filter and redesigned the entire system, including the runner system. In practice, it has provided better flow effects beyond just the removal of inclusions. If you are struggling with issues such as excessive pouring speeds, turbulence, or entrapment, you might want to consider this solution. [Towards the Practical Application of the Three-Dimensional Structure Strainer] - Reduce the thickness of the filter (to be addressed by the manufacturer) - Redesign the entire system, including the runner system *For more details, please refer to the PDF document or feel free to contact us.

• others
• filter

Casting involves pouring liquid metal into a mold, and if the viscosity resistance increases, it will take longer to fill the mold, with the possibility of solidifying along the way. The viscosity of a liquid is represented by a numerical value known as the viscosity coefficient (symbol η) in physics. In the case of liquid flow, the viscosity resistance is influenced not only by the viscosity coefficient but also by the density (symbol ρ). The value obtained by dividing η by ρ (known as kinematic viscosity or kinematic coefficient, symbol ν) is given by ν = η / ρ, and it is a key factor governing viscosity resistance. Since the value of η for molten metal is originally small and combined with a high ρ, the value of ν becomes extremely small. [Kinematic Viscosity ν (10^-2 × cm²/s)] ■ Water: 1 ■ Ethyl Alcohol: 1.5 ■ Steel: 0.5 ■ Cast Iron: 0.7 ■ Copper: 0.4 *For more details, please refer to the PDF document or feel free to contact us.

• others

We would like to introduce the production achievements of Daimaru Industrial Co., Ltd. We have numerous production achievements, including "general-purpose valves," "faucet fittings," and "meter equipment." We make the most of the technology, experience, and know-how we have cultivated over the years to meet the needs for high-difficulty product manufacturing and small lot production. 【Production Achievements】 ■ General-purpose valves ■ Faucet fittings ■ Meter equipment ■ Air equipment *For more details, please refer to the external link page or feel free to contact us.

• Contract manufacturing

At Daimaru Industrial Co., Ltd., we carry out the manufacturing of castings consistently from casting to assembly. We make the most of the technology, experience, and know-how we have cultivated over the years to meet the needs for high-difficulty product manufacturing and small lots. We actively respond to our customers' challenging requests and continue to pursue new possibilities. [Features] ■ Consistent support from casting to assembly ■ Responding to needs for high-difficulty product manufacturing and small lots ■ Addressing difficult requests *For more details, please refer to the PDF materials or feel free to contact us.

• Casting Machine
• Contract manufacturing

Our company specializes in the manufacturing of bronze alloy sand castings, primarily focusing on various types of valves. We can accommodate relatively large products with a molding machine frame size of 600(W) x 400(L) x 130(H)/130. Additionally, we respond to various customer needs, including requests for small lot orders and the production of original prototypes. We have a track record of producing large-diameter water meters of 75 and 50, as well as partition valves up to 4 inches. Please feel free to contact us with your requests. 【Strengths】 ■ Well-equipped facilities and production capacity ■ Abundant production experience ■ Reliable technology and quality *For more details, please download the PDF or feel free to contact us.

• valve
• Contract manufacturing