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In the modern material transportation system and precision movement, timing belt plays a vital role. Perforation of timing belt is a kind of post-process of the belt, which has its unique structure and functions. So what are perforated timing belt and there are how many types of holes, and what their functions? This article will explore into perforated timing belt.
What is Perforated Timing Belt?
The perforated timing belt is a rubber or polyurethane timing belt with regular holes on the belt surface. These holes are precisely designed for various function in transmission system, like accurate , positioning delivery or vacuum suction.
Types of Perforations
- Through holes: Completely penetrates the belt, mainly used for vacuum adsorption, generally circular shape holes.
- Counter bores: Only partial depth, suitable for lightweight adsorption or positioning function, the hole shape has round, square, oval, diamond and so on.
- The perforations pitch, size and positions can be customized.
Timing Belt Perforations Processing Methods
- Mechanical Punching: Use the mold punching needle to punch out the hole on the synchronization belt directly. It fits for large hole diameter and mass production, but it is not suitable for particularly high accuracy requirements.
- Laser Drilling: Use laser beam to cut the surface of the toothed belt to form regular holes with high accuracy and controllable position. The holes has smooth edge, not easy to produce burr. It is preferred for high precision demand occasions.
- CNC Machining: The perforations are made on belt surface CNC equipment with drills. It is highly flexible and can be customized according to CAD drawings of any arrangement. It is suitable for diversified and small batch customization. The processing efficiency is low, but the accuracy is high.
- Hot Punching: A heating punch is used to “melt through” the hole on the toothed belt. The perforations has smooth edge, not easy to crack, which is especially suitable for polyurethane timing belt.
| Punching Methods | Process | Advantages | Disadvantages | Applications |
|---|---|---|---|---|
| Mechanical Punching | Molding punching needle to punch holes directly | Fast and for mass production | Accuracy is not high, holes have burr | Package, paper transportation |
| Laser Drilling | Laser ablate perforations | High accuracy, smooth edge | High cost | PCB transportation |
| CNC Machining | CNC machine drill holes | Flexible customization, complex holes are available | Low efficiency | Special vacuum convey customization |
| Hot Punching | Heating punch burn through holes | Smooth edge, clean and sanitary | Holes size is limited | Food and medicine industry |
Functions of Perforated Timing Belt
- Air Suction: When the perforated timing belt is running, it can absorb the products firmly on it.
- Accurate Position: The positioning holes punched in the horizontal or vertical direction of the belt can perform the precise transmission function, which woks well in the system with high alignment requirements such as label printing and packaging machinery, and provides favorable help for the precise installation of accessories.
- Drainage: The toothed belt need to be cleaned and maintained regularly and when it convey cleaning products, the perforations can make the cleaning liquid flow away from the surface quickly.
- Improve Belt Heat Dissipation: The friction will generate heat during transmission process, and if the heat cannot be dissipated in time, it will affect the performance and life of the timing belt. Holes increases the heat dissipation area and accelerates heat dissipation, thus ensuring the stability and reliability of the synchronous belt during long operation.
Applications of Perforated Timing Belt
| Industries | Machines | Main Functions |
|---|---|---|
| Package | Vacuum Packaging Machine,Vertical Form Fill Seal Packing Machine | Vacuum adsorption film or package bag to prevent slip and position offset |
| Printing and labeling | Label Printer, Die-cutting Machine | The hole positioning is used to achieve accurate printing, cutting and labeling |
| Electronics | PCB transmission line, SMT patch machine | Adsorb circuit board or component to ensure high-speed transmission and stability |
| Food and medicine | Biscuit dispensing machine, medicine blister packaging machine | Hygienic delivery, vacuum fixed lightweight food packaging |
| Logistics and sorting | Automatic sorting machine, small parcel sorting line | Vacuum adsorption of small parts to prevent jumping and deviation from the line |
| Testing and automation equipment | Photoelectric detection line, automatic counting sorting machine | Holes are used for vacuum transmission and also as sensor identification points |
Perforated Timing Belt VS General Timing Belt
| Items | Perforated timing belt | General timing belt |
|---|---|---|
| Surface structure | Perforations on the surface | Complete surface |
| Function | Suction and position transmission | Power transmission |
| Applications | Vacuum, labeling and precision machining | General synchronous transmission |
