Steel doors are typically made from medium-thickness steel plates, known for their excellent heat resistance and fireproofing properties. The door panels are often filled with special fire-resistant materials such as rock wool and fireproof calcium silicate boards to enhance their fire resistance.

Currently, metal door manufacturers are mainly located in China, Germany, France, Italy, the United Kingdom, India, etc. Due to the high production costs in European countries, the prices of complete sets of equipment or production lines are also higher. China and India have a large number of metal door manufacturing enterprises, but China has more mature technology and a more complete industrial chain. It is possible to purchase door production lines or door making machines from a single enterprise.

You do not need any special certifications to start your own metal door production line business. However, it would be beneficial for you to study production engineering, metal and materials science, or related courses before starting this type of venture. It will provide you with a better understanding of the business and opportunities to maximize its potential.

If you are considering starting a metal door manufacturing company, it means you should be prepared to purchase industrial punching machines, industrial cutting machines, metal sheet forming machines, and other door machinery. You can also directly purchase a complete metal door production line.

Door frames are manufactured using different door frame profiles based on their thickness and national standards. A common and efficient method is roll forming, where door frames are continuously produced and aligned using a roll forming line.

Sheet metal forming, also known as sheet metalworking, sheet metal forming and sheet metal fabrication, is a manufacturing process that involves cutting and shaping relatively thin metal sheets, strips, and coils to create desired sheet metal parts. This process is widely used in the door manufacturing industry.

In the metal door industry, common sheet metal processing techniques include sheet metal rolling, sheet metal punching, sheet metal flanging, sheet metal cutting, and more.

In the metal door manufacturing process, sheet metal forming is used to shape metal sheets into various forms such as door frames or door panels. It utilizes the strength and ductility of sheet metal to fabricate structural components of metal doors, offering lower production costs compared to forging and similar manufacturing processes.

In the door manufacturing industry, various metal materials can be selected depending on the final application of the metal doors. Common metals suitable for sheet metal forming in the metal door industry include stainless steel, aluminum, cold-rolled steel, galvanized steel, and more.

Rolling is a process of forming metal into thin, elongated layers by passing it through the gap between two rotating rolls in different directions (clockwise and counterclockwise). The gap between the rolls should be smaller than the thickness of the workpiece being formed.

Sheet metal forming does not force the metal to flow into new shapes like rolling, forging, or extrusion. Instead, it induces plastic deformation within the overall material without significantly changing its thickness or grain structure.

For door manufacturing companies, using the rolling technique ensures processing progress and time efficiency for metal doors. It is particularly suitable for mass production of metal doors and is well-suited for large-scale metal door processing companies. It accommodates the processing of structural components for different types of doors, fulfilling the diversity in manufacturing metal doors. The rolling process ensures precision and consistency in metal doors.

Metal flanging is a bonding and forming technique used in the shaping of metal sheets. It involves bending the edges of a metal sheet using a flanging machine, which can reinforce the bent edges or create connections composed of multiple components.

A flanging machine is a specialized device designed for creating flanges or edges on metal sheets or plates. These machines employ a combination of bending and forming techniques to form raised edges or lips, enhancing structural integrity and improving joint connections.

In the metal door processing industry, the current equipment can process materials such as galvanized sheets, cold-rolled sheets, hot-rolled sheets, color-coated sheets, stainless steel sheets, etc., with thicknesses ranging from 0.2mm to 1.8mm.

A hydraulic punching machine is a machine that operates using hydraulic pressure. It consists of a piston inside a cylinder connected to a punch head. The punch head drives into the workpiece, creating a hole on the surface. In the door manufacturing industry, it is mainly used for punching holes in door panels and door frames.

Sheet metal punching is a process of shaping metal surfaces by applying pressure or impact with steel punch tools. During the metal punching process, material is removed from a metal sheet by applying sufficient cutting force. Various metals can be punched, including steel, iron, copper, aluminum, and more.

Punching is a sheet metal manufacturing process performed using a punch press. The process can involve a single tool head and die design or a multiple-tool turret design. In the CNC punch press process, the metal sheet is positioned accurately beneath the punching head to prepare for punching or forming of the metal. Similar to most metal fabrication machinery, a punch press consists of a bed, table-style punch head, dies, rotating turret, and frame.

Using our punching technology, it is possible to achieve punching of both plate and coil materials, for the production of stainless steel doors such as security doors, fire-rated doors, hospital doors, etc.

Sheet metal punching is a cutting process that removes material from a metal sheet by applying sufficient shearing force. Metal punching can be used to produce holes and cutouts of various shapes and sizes.