Molds are the core process equipment in the manufacturing industry, and also the core supporting field that Ruichi Hardware has been deeply engaged in for 20 years. Ruichi focuses on the R&D, production and sales of roof drainage series products, HVAC ventilation series products, wooden structure connection hardware, garage door supporting series products and other customized products. With 20 years of production experience and 11 years of online service experience, we have long provided products and customized solutions for distributors, wholesalers and retailers in the United States, Canada, Australia and other countries. Our mold design and manufacturing are all carried out around the core needs of our own hardware products, accurately adapting to the processing of hardware base materials such as galvanized sheet, stainless steel and carbon steel.
The core principle of mold design and manufacturing is to design a cavity and structure with the characteristics of precise forming, efficient demolding and stable durability according to the product structure, material and forming process requirements, process the mold base material into finished products meeting the design standards through processing means, and finally realize the mass and standardized production of hardware products. Molds for different forming processes have significant differences in design logic and manufacturing principles due to the differences in processing requirements and product characteristics. Combined with the application scenarios of Ruichi Hardware products, the following focuses on the analysis of the design and manufacturing principles of various commonly used process molds in industrial production.
Stamping technology is widely used in the following industries: hardware products, household appliances, automobile manufacturing, heating, ventilation and air conditioning (HVAC), furniture fittings, wooden structure construction, electronic and electrical appliances, communication equipment, lighting fixtures, mechanical equipment, rail transit, kitchen and bathroom equipment, tool boxes, industrial sheet metal and other fields.
The core of a stamping mold is to make the sheet metal undergo plastic deformation or separation under the constraint of the mold cavity (punch and die) through the action of external force to obtain products with the required shape and size. It is a key equipment for Ruichi Hardware to produce core products such as gutter hanger bracket, endcaps, joist hanger, nail plates, damper blade, G-Clamp,duct corner.Combining Ruichi’s 20 years of hardware processing experience, the design of its stamping molds focuses on “forming accuracy”, “force balance” and “hardware base material adaptation”, accurately matching the characteristics of commonly used base materials such as galvanized steel, stainless steel and carbon steel. The key points include:
The gap between the punch and the die must be accurately matched (an excessive gap is prone to burrs, and an insufficient gap is prone to scratching products and damaging molds). Combined with Ruichi’s product scenarios, the gap value (usually 5%-10% of the sheet thickness) is determined according to the sheet thickness and material (such as galvanized steel, stainless steel), adapting to the precision requirements of stress-bearing hardware such as joist hanger and nail plates to ensure that products meet the foreign trade export standards.
The mold shall be equipped with a guiding mechanism (guide pillar and guide sleeve) to ensure the precise alignment of the punch and die movement and avoid product deformation caused by deflection; at the same time, a stripping mechanism (stripper plate and ejector pin) is designed to ensure the smooth demolding of products after stamping, avoid mold jamming, adapt to mass production needs, and improve the production efficiency of gutter hanger brackets, endcaps and other products. Relying on Ruichi’s existing processing equipment foundation, the guiding precision is further optimized to ensure product consistency.
Adjust the mold structure according to the stamping processes (blanking, bending, drawing, flanging) – blanking molds focus on the sharpness of the cutting edge to adapt to the cutting needs of damper blade and other products; bending molds focus on the cavity radian and springback compensation to adapt to the bending forming of hook codes and angle codes; drawing molds focus on lubrication and wrinkle prevention (equipped with blank holders) to adapt to the complex forming of various hardware fittings, fully meeting the diversified production needs of construction hardware.
The manufacturing of stamping molds focuses on the “precision processing of cavity and cutting edge”, following the process of “base material pretreatment → rough processing → finish processing → surface treatment → assembly and debugging”. Combined with the high-quality requirements of Ruichi Hardware’s foreign trade export, its manufacturing principles are reflected in:
Select high-strength and high-hardness mold steel (such as Cr12MoV, SKD11), reduce hardness and eliminate internal stress through annealing treatment for easy subsequent processing, and improve mold durability at the same time to adapt to Ruichi’s mass production needs and ensure the long-term stable operation of the mold.
First, rough processing is carried out by milling machine and lathe to remove excess base material and reserve a finish processing allowance of 0.1-0.3mm; then, high-precision processing of the cavity and cutting edge is realized by electrical discharge machining (EDM) and wire cutting machining (WEDM) to ensure that the dimensional error is controlled within ±0.005mm, and the cutting edge is sharp without chipping, which conforms to the precision standard of Ruichi Hardware’s export and ensures the dimensional consistency of products.
Quenching and tempering treatment are carried out on the cavity and cutting edge to improve the mold hardness (usually reaching HRC58-62) and enhance wear resistance; if necessary, nitriding and chrome plating treatment are carried out to reduce friction and prevent rust, adapting to the production needs of Ruichi’s outdoor hardware (such as garage door tracks, outdoor wooden house beam supports), and at the same time meeting the stringent requirements of the overseas market for anti-corrosion and rust prevention of hardware products, forming synergy with Ruichi’s product surface treatment process and improving the overall durability of products.
Precisely assemble the punch, die, guiding mechanism, stripping mechanism and other parts, test punch samples, adjust the gap, guiding precision and stripping force to ensure that the stamped products are qualified in size, free of surface defects, and the mold runs smoothly, adapting to the production needs of Ruichi’s hardware products for household, commercial, industrial and other scenarios. At the same time, it provides debugging support for molds with customized sizes, hole positions and shapes for customers, matching Ruichi’s all-round customized service concept.
Injection molding technology is widely used in: household appliances, auto parts, electronic and electrical appliances, furniture fittings, kitchen and bathroom products, industrial structural parts and other industries.
The core of an injection mold is to inject molten plastic melt into the mold cavity under high pressure and high speed, and form plastic products consistent with the cavity shape after cooling and solidification. Combined with Ruichi’s product positioning, its design focuses on three key points: “melt flow”, “cooling and solidification” and “smooth demolding”, taking into account the adaptability of plastic and hardware. The key points include:
The cavity shape completely replicates the product shape, and the shrinkage rate of plastic (different plastics have different shrinkage rates, such as PP with a shrinkage rate of 1.5%-3.0%) must be considered, and shrinkage allowance is reserved in the design to ensure the precise size of the product after cooling. At the same time, it adapts to the assembly needs of hardware connectors, avoids assembly dislocation between plastic parts and hardware parts, and ensures the one-stop supporting precision of products.
Design gates and runners to ensure that the molten plastic fills the entire cavity quickly, evenly and without air bubbles. The gate position shall avoid the key appearance surface of the product and be easy for subsequent trimming, which conforms to the aesthetic and practical requirements of Ruichi Hardware’s supporting products, ensures the adaptability of plastic fittings and hardware parts, and improves the overall quality.
Set cooling water channels around the cavity to take away the melt heat through circulating cooling water, so that the plastic can be quickly solidified and formed. The cooling water channels shall be evenly distributed to avoid product deformation and shrinkage marks caused by uneven cooling, improve production efficiency and adapt to Ruichi’s mass production needs.
According to the product structure (such as the presence or absence of undercuts and wall thickness), design demolding mechanisms such as ejector pins, ejector sleeves and lifters to ensure the smooth demolding of the product after solidification without scratching or deformation, ensure the quality of plastic fittings, and adapt to the assembly precision of hardware supporting.
The manufacturing of injection molds focuses on “high cavity precision, surface smoothness and system tightness”. The process is similar to that of stamping molds, but the processing precision and surface requirements are higher. Combined with Ruichi Hardware’s supporting needs, its core principles are:
Select mold steel with corrosion resistance and good thermal conductivity (such as P20, H13). Pre-hardened steel can be selected for small molds, and annealed steel must be selected for large molds for quenching treatment after rough processing, adapting to the mass production of Ruichi’s plastic fittings, ensuring mold durability and supporting the long-term supply of products such as accessory boxes.
After rough processing, semi-finish processing is carried out by CNC milling machine and CNC machining center, and then the cavity details are processed by electrical discharge machining and wire cutting; for products with high surface requirements, the cavity needs to be polished (polished to a mirror effect, Ra≤0.02μm) to ensure the smooth surface of plastic fittings, which conforms to the high-quality positioning of Ruichi Hardware products and matches the overseas customers’ requirements for product details.
Precisely assemble the gating system, cooling system, demolding system, guiding system and other systems to ensure the coordinated operation of each system – no leakage of cooling water channels, smooth movement of ejector pins, and smooth connection between gates and runners, ensuring production efficiency and product qualification rate, adapting to Ruichi’s mass production needs, and providing mold support for customized packaging and accessory combination at the same time.
Install the mold on the injection molding machine, inject molten plastic for trial molding, observe the melt filling speed, cooling time and demolding effect, adjust the injection parameters (temperature, pressure, speed) and mold structure until qualified products are produced, ensure the precise adaptation of plastic fittings and hardware products, and guarantee the consistency of supporting products.
Die casting technology is widely used in automobile, home appliance, furniture fitting, electronic and electrical appliance, hardware lock, mechanical equipment, plumbing and bathroom, medical equipment, communication equipment, new energy accessory and other industries, and is suitable for mass production of high-precision and high-strength metal structural parts and components.
The principle of die casting molds is similar to that of injection molds, but aiming at the characteristics of non-ferrous metals (high melting temperature and strong fluidity), it focuses on optimizing “high temperature resistance, rapid forming and smooth exhaust”, and is mainly used for the production of high-strength aluminum alloy and zinc alloy fittings in building formwork. Combined with Ruichi’s 20 years of foreign trade production experience, its core design logic is:
Consider the shrinkage rate of non-ferrous metals (such as aluminum alloy with a shrinkage rate of 0.8%-1.2%) and reserve shrinkage allowance; at the same time, design exhaust grooves to discharge the air and fuel gas in the cavity, avoid air holes and sand holes in products, ensure the strength of aluminum alloy and zinc alloy fittings, and meet the stringent standards of the overseas market for hardware strength.
Adopt a combined structure of sprue, runner and ingate to ensure that the molten metal (temperature 600-700℃) fills the cavity quickly and stably, reduce splashing and oxidation, ensure the surface quality and internal strength of non-ferrous metal fittings, conform to the high-quality positioning of Ruichi Hardware, and support the production of high-end furniture fittings.
The mold cavity must have high temperature resistance, increase the cavity wall thickness in the design, and set a heat dissipation mechanism at the same time to avoid mold deformation and wear caused by long-term high temperature; vulnerable parts such as ejector pins are made of high temperature resistant materials to adapt to Ruichi’s mass production needs, ensure the long-term stable operation of the mold, and support the production of multi-specification and customized non-ferrous metal hardware fittings.
The manufacturing of die casting molds focuses on “high temperature resistance, wear resistance and high precision”. Due to contact with high-temperature molten metal, the requirements for base material and surface treatment are extremely high. Combined with Ruichi’s production needs of non-ferrous metal hardware fittings, its core principles are:
Select hot work die steel with high temperature resistance and high strength (such as H13, SKD61), improve the mold hardness and high temperature stability through quenching and tempering treatment, ensure that it does not soften or deform in a high-temperature environment for a long time, adapt to the mass production of Ruichi’s aluminum alloy and zinc alloy fittings, and support the large-scale procurement needs of overseas customers.
Adopt CNC machining center, electrical discharge machining and wire cutting for high-precision processing, and carry out nitriding treatment on the cavity surface (improve surface hardness and wear resistance) to avoid cavity wear caused by high-temperature metal scouring, ensure the dimensional precision of non-ferrous metal fittings, conform to the precision standard of Ruichi Hardware’s export and ensure product consistency.
Process fine exhaust grooves (0.05-0.1mm in width) at the edge and dead angle of the cavity to ensure smooth exhaust and prevent molten metal from overflowing, avoid air holes and sand holes in products, improve the product qualification rate, and meet the stringent quality control of the overseas market for products.
Strictly control the matching precision of each part to ensure the tight mold clamping without leakage; adjust the die casting temperature, pressure and speed during trial molding, optimize the exhaust effect, solve the problems of product air holes and deformation, ensure the precise adaptation of non-ferrous metal fittings and other Ruichi hardware products, and provide mold support for customers’ customized size and shape fittings at the same time.
Extrusion technology is widely used in building profiles, aluminum alloy doors and windows, furniture fittings, auto parts, electronic and electrical appliances, rail transit, aerospace, sports equipment, new energy equipment and other industries, and is mainly used to produce various long profiles and structural parts with uniform cross-section shape, high strength and stable precision.
The core of an extrusion mold is to extrude metal or plastic billets into shape under pressure through the extrusion hole (die hole) of the mold to obtain profiles with uniform cross-section and precise size. It is mainly used for the production of Ruichi’s roof drainage series products. Combined with Ruichi’s product scenarios, its design core is “die hole structure and force balance”:
The shape of the die hole is consistent with the profile cross-section, and the material fluidity must be considered. For profiles with complex cross-sections (such as gutters of roof drainage systems), a shunt bridge and a diversion cavity are designed to distribute the billet evenly, avoid uneven wall thickness and deformation of the profile, adapt to Ruichi’s conventional specifications of gutters such as 5/6/7/8 inches and customized profile needs, and ensure the precise guiding and uniform force of the gutter.
The mold must withstand huge extrusion pressure (up to several thousand tons), so the mold structure must have sufficient strength and rigidity, and the wall thickness around the die hole is increased to avoid mold cracking caused by excessive stress, adapting to the production needs of Ruichi’s high-strength track and support profiles, and ensuring that the profiles can bear the long-term stress of garage doors and wooden structure buildings.
The inner wall of the die hole must be smooth to reduce the friction between the billet and the mold, and an outlet guiding mechanism is designed at the same time to ensure the smooth forming of the profile after extrusion without bending or deformation, improve production efficiency, adapt to Ruichi’s mass production needs, and ensure the dimensional consistency of tracks and other profiles, meeting the procurement standards of overseas customers.
The manufacturing of extrusion molds focuses on “die hole precision, mold strength and surface smoothness”. Combined with Ruichi’s production needs of roof drainage system products, its core processes are:
Select high-strength and high-toughness mold steel (such as H13, W6Mo5Cr4V2). For large extrusion molds, the base material is processed by forging technology to improve the compactness and strength of the mold, adapt to the high-strength requirements of Ruichi’s gutters and support profiles, ensure the long-term stable operation of the mold, and support multi-specification and mass production.
First, process the preliminary die hole shape by drilling and milling, then process the die hole details by wire cutting and electrical discharge machining to ensure that the dimensional error of the die hole is controlled within ±0.01mm; the inner wall of the die hole is polished and nitrided to reduce friction and improve wear resistance, ensure the smooth surface and precise size of the profile, conform to the high-quality positioning of Ruichi Hardware, and match the overseas market’s requirements for profile precision.
Carry out quenching, tempering and aging treatment on the mold to improve the mold hardness and toughness, eliminate the internal stress of processing, ensure that the mold does not crack or deform under high-pressure extrusion, adapt to Ruichi’s mass production needs, and support the large-scale production of conventional specifications of roof drainage system products such as 5/6/7/8 inches and customized profiles.
Install the mold on the extruder, put the billet for trial extrusion, observe the cross-sectional size and surface quality of the profile, adjust the extrusion pressure, speed and mold temperature, optimize the die hole structure until qualified profiles are produced, ensure that the tracks and other profiles can adapt to the installation needs of Ruichi’s garage doors and wooden structure hardware, and provide support for customers’ customized track radian and size at the same time.
Spinning technology is mainly suitable for the forming of rotating body metal parts, and is widely used in ventilation and HVAC, fan air outlets, pipe fittings, metal end covers, kitchen and bathroom hardware, lamp housings, auto parts, aerospace containers and other industries. It is especially suitable for producing symmetrical structure products such as circular, conical, arc, cylindrical and bowl-shaped products with high forming precision, smooth surface and good sealing performance.
The core of a spinning mold is to make the rotating billet fit the mold and gradually form it under the pressure of the spinning wheel to realize the processing of weldless and high-precision rotating body parts. It is mainly used for the production of Ruichi’s circular air outlets, pipe heads, drain hoppers, ventilation pipe fittings and other products. The design core focuses on fitting precision, rotation stability and forming fluency:
The mold shape is completely consistent with the rotating contour of the product to ensure uniform radian and precise roundness of the product after spinning. For arc/conical products such as lamp shades, air outlets and pipe shrinkage, the mold surface transitions smoothly to avoid wrinkling, tearing and uneven wall thickness, and ensure the product sealing and appearance consistency
The mold works under high-speed rotation and radial pressure, requiring strong structural rigidity and stable dynamic balance to prevent product eccentricity or dimensional deviation caused by rotational runout.
The mold surface is smooth and the taper is reasonable, which is convenient for the smooth demolding of the product after spinning without scratching, sticking or deformation, improves the yield and production efficiency, and meets the high standards of overseas customers for appearance and precision.
The manufacturing of spinning molds focuses on ensuring rotation precision, surface smoothness, structural strength and dynamic balance stability. The core processes are as follows:
Select mold steel with high hardness, high wear resistance and deformation resistance to ensure that the mold does not crack or deform under high-speed rotation and continuous pressure, adapting to long-term mass production.
Process the mold shape by CNC lathe, grinding machine and precision milling to ensure that the roundness, coaxiality and surface precision meet high standards; the key parts are finely polished to make the product surface smooth without scratches, which meets the quality requirements of Ruichi’s export products.
Carry out quenching, tempering, nitriding and other treatments on the mold to improve hardness, wear resistance and service life, reduce mold wear, and ensure dimensional stability during continuous production.
Carry out dynamic balance correction and trial spinning after mold assembly, adjust the rotating speed, feed rate and spinning wheel pressure to ensure uniform wall thickness, regular shape and precise size of the product, perfectly adapting to the large-scale and customized production of Ruichi’s pipe fittings, metal end covers, lamp housings and other series products.
Regardless of the type of process, the design and manufacturing of molds follow three core common principles, which are the key to the qualification of molds and the core summary of Ruichi’s 20 years of mold production experience, fully adapting to the production and foreign trade export needs of Ruichi Hardware products:
The dimensional precision of the mold cavity and parts must match the product design precision, and at the same time take into account the feasibility of the processing process to avoid excessive pursuit of high precision leading to increased processing costs and extended cycles. It conforms to the precision standard of Ruichi Hardware’s export, ensures consistent product dimensions, and adapts to the assembly needs of overseas customers.
The mold must have sufficient hardness, wear resistance and stability, be able to withstand external force, high temperature, friction and other effects in mass production, reduce mold loss, improve service life, adapt to Ruichi’s mass production needs, and support the large-scale procurement of overseas distributors and wholesalers. At the same time, relying on Ruichi’s mature processing technology, the mold durability is further improved and the production cost is reduced.
The design and manufacturing of the mold must be fully adapted to the product material, forming process and production equipment to ensure convenient mold installation, smooth operation, and stable production of qualified products, and facilitate mold maintenance and repair. Combined with the characteristics of Ruichi’s commonly used base materials such as galvanized sheet, stainless steel and carbon steel, it adapts to the production of construction hardware products for multiple scenarios such as roof drainage systems, HVAC ventilation series, wooden structures and garage doors. At the same time, it supports all-round customized services such as size, material, shape and surface treatment, conforming to Ruichi’s core concept of “customization on demand and precise adaptation” and meeting the customized needs of different customers.
The core of mold design is to “adapt to products and processes”, and the core of manufacturing is “precision and durability”. Although molds for different processes have differences in design and processing due to product characteristics and forming requirements, they all focus on the goal of “producing qualified products in batches” and realize the functional value of molds through scientific design logic and precise processing means. For Ruichi Hardware, the design and manufacturing of molds are deeply bound to its 20 years of hardware production experience and foreign trade layout. All molds are accurately adapted to the production needs of its core products such as roof drainage systems, HVAC ventilation series, wooden structures and garage doors, taking into account standardization and customization, supporting Ruichi to provide high-quality hardware products and customized solutions for global customers. At the same time, relying on mature processing strength, the product quality is ensured to meet the stringent standards of the overseas market, and stable and trustworthy long-term cooperative relationships are established with domestic and foreign merchants.
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