Seahow Industrial Seahow Group

The main components of a garage / overhead / sectional garage door includes: door panel, strut, side post (end cap), central post (mullions), horizontal angle, vertical track, etc. can all be fabricated by rollformer and related equipment. As well as various insulated products such as compartment wall board.

Various Panels: Embossed, Tiled, Insulated, Combination Insulated Compartment Board Post & Track
| garage door panels and related parts |

A complete layout of the standard door panel manufacturing processes can be done in the following order:

  1. Uncoiler with Coil Car
  2. Embossing Machine More Information »
  3. Rotary Trimming Rollers with Scrap Choppers
  4. Rollformer with Dynamic Width Adjust  More Information »
  5. Pre-Cut / Post-Cut (depending on applications)
  6. Hydraulic Tile Press
  7. PU Foam Injection
  8. Transfer/Assembly Table
  9. Packaging

Embossing Machine: More Information »

Standard Embosser Dimension: 1,300 mm (W) X 1,300 mm (H) X 1,800 mm (L)

The embossing machine is equipped with Frequency Converter when it is to be incorporated in a production line to match the overall production speed. Hydraulic Cylinder is also added so the engagement can be controlled in the main system.

Products can be embossed with different textures, which can be either aesthetic or structural or both reasons. The most popular textures are the wood-grained and the pebble-grained patterns.

In cases where the patterns on both sides of the panels have to be matched, a set of well-matched engraved counter rollers will be necessary. This will ensure the panels are aesthetic and durable from the inside as well as outside. Other applications such as insulation (foam), where the inside of the panel will not be visible, only one engraved roller is necessary.

Rollforming Machine: More Information »

Standard Rollformer Dimension: 1,350 mm (W) x 1,500 mm (H) x 12,000 mm (L)
Standard Un-coiler Dimension: 1,100 mm (W) x 1,500 mm (H) x 2,400 mm (L)

SEAHOW Rollformers are now available with Dynamic Width Adjust where the width can be simply adjusted via touch screen.

Multiple reinforced rib lines are automatically calculated so they are evenly spaced across the panels. So when the door is installed, the rib lines will look perfectly uniform. Rollers to roll form the rib lines are also fitted with Hydraulic Cylinder to easily switch to producing a completely flat panel, to either stay flat or to press raised tiles.

Rotary Trimming Rollers eliminate the need to change coil when producing varying width of panels, cutting slitting costs as well as minimizing the stockpile of different width of steel coils. The Scrap Choppers chop up the slit edges to smaller and manageable sizes, as well as reducing health hazard versus Scrap Re-winders.

Trimming Rollers Trimming Rollers Trimming Rollers

We utilize the latest model of brand name PLC's such as Mitsubishi to compute and control our components. Workers can as easy as simply input a door opening size and quantity, then the system will calculate the required number and the width of panels to cover the opening. The numbers of reinforcement posts (mullions) and side posts (end caps) can be passed on to individual rollformers for production as well.

The rollformer is the core of the production line. With the above features integrated with advanced PLC programming & algorithm with user-friendly interface, we offer the best investment for your equipment purchase.

Hydraulic Tile Press:

Standard Hydraulic Tile Press Dimensions: 1,900 mm (W) x 4,000 mm (H) x 1,700 mm (D)

Hydraulic Press Layout

Key Features:

  • 200 ~ 800 Metric Ton depending on application
  • Equivalent CQ grade colour steel, 0.4 mm ~ 1.0 mm thickness used commonly for door manufacturer
  • Hydraulic pressing die material: SKD11, S50C and S400, one cavity per die per operation
  • Four-post construction press frame design with adjustable capacity range and slide stroke
  • Shock reducing dies
  • Control system by push button or PLC
  • Hydraulic oil cooling and filtration unit
  • Seahow provides technicians to assist with installation and pilot run, if needed

Normally when the roll forming machine forms the flushed sectional standard garage door panels for the tile pressing, the plain surface will have around ±2mm visible wave after forming. The area of four rectangular angles of tile will shrink, even break out sometimes, after pressing. It is absolutely critical to design a machine to eliminate the possibility of deformation.

The most flawless way in producing a tile pressed panel is to have a die with the exact number of tiles desired, capable of sufficient force to press. Usually the cost is very high and not economical for most of the customers. However, we are capable in designing the rollforming machine and hydraulic pressing machines for the most cost effective, flexible options, and simple to operate with high efficient productivity, keeping the deformation minimum.

Tile Press Assortment
click for larger images

PU Foam Injection:

Standard PU Foam Injection Dimension: 260,000 mm (L) x 1,500 mm (D) x 2,500 mm (H)

Key Features:

  • Produce 0.4 mm up to 0.8 mm thickness of color steel (CQ grade), with insulated polyurethane foam material.
  • Foam density is around 20 ~ 45 Kg/M3
  • Hydraulic pressing die material: SKD11, S50C and S400, one cavity per die per operation
  • Production speed around 2 ~ 6 meters per minute
  • Optimum material temperature around 500 ~ 600 C
  • Total production power capacity around 60 K.W.
  • Size of foamed product around 530 ~ 610 mm in width x 40 mm in thickness


  • Stainless steel (# SUS 304) material tank, 600 liter & foaming exchange tank, 200 liter
  • Hot air system
  • Foam material cooler
  • Auto paper cutting system
  • Frequency inverter
PU Foam Injection Machine Layout
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Roll forming machine → Formed product pre-heating → Inject PU foaming material → PVC paper → Compound panel compressing transmission → Heating panel-shaping process → Foamed panel cutting → PU panel (final product) → Formed steel cutting machine.

The system is used for the application of producing insulated sandwich-type garage door panel, roller door panel, rolling shutter door slat, corrugated roofing sheet, inner and outside wall panels, automobile accessories, building and transportation, etc.

Based on the requirement of customers, the production line to fabricate sandwich insulated sectional garage door panel can be specified as semi-automatic and fully automatic PU form injection system.

We reserve the right to modify the technical details and data listed above as a result of ongoing, technical improvement programs.