Analysis Of Hot Bending Forming Of Polycarbonate PC Solid sheet

Polycarbonate PC solid endurance panels are suitable for high-rise buildings, schools, hospitals, residential buildings, and bank lighting facilities, as well as places where shatter-resistant glass must be used. It is widely used in large-area lighting roofs and staircase guardrails. Polycarbonate PC solid endurance sheet, like other thermoplastic sheets, can be bent and formed.

Hot bending is a commonly used method for forming polycarbonate PC solid sheets. It involves heating the sheet to a specific temperature and then bending it along an axis to achieve the desired shape. Here is an analysis of hot bending forming of polycarbonate PC solid sheets based on the search results:

Hot Bending Process:

Hot bending is a relatively simple forming method that is frequently used to obtain parts that are bent along an axis.

A radiant heater, such as an infrared emitter or a resistance heater, is used to heat the bending line of the sheet .

The temperature required for hot bending is typically around 150-160℃, and pre-drying is usually not necessary unless the forming temperature is very high .

The sheet should be rotated while heating on one side to ensure uniform heating .

Once the appropriate plate temperature is reached, the plate is removed from the heater and pressure is applied until the plate is bent to the required angle .

For higher precision and when bending sheets that are 3mm or thicker, double-sided heating is recommended for better results .

The minimum bending radius for polycarbonate PC solid sheets is three times the thickness of the sheet, and the width of the heating zone can be adjusted to achieve different bending radii.

To reduce deflection and maintain the shape, a simple shaping bracket can be used to cool the plate in place after bending.

It is important to note that local heating can cause internal stress in the product, and chemicals used for hot bending should be used with caution.

 

 

 

Cold Line Bending:

Cold line bending is a technique where a polycarbonate sheet is bent without heating.

It is recommended to use tools with sharp edges and allow sufficient time after bending for the best results.

Overbending may be required to compensate for springback, which is the tendency of the bent polycarbonate to revert to its original position .

Cold line bending is not suitable for polycarbonate variants that are hard coated or UV-protected, as it may weaken the additives along the bend line.

Cold Curving:

Cold curving involves bending the entire polycarbonate sheet to create a dome or an arch shape.

The minimum cold forming radius is determined by multiplying the sheet thickness by 100

The harder the variant of polycarbonate, the greater the minimum cold forming radius required.

Break Bending:

Break bending utilizes a press brake to alter the polycarbonate sheet into the desired final form.

Manual press brakes, hydraulic press brakes, and CNC press brakes are commonly used for break bending.

Hot Line Bending:

Hot line bending takes advantage of the thermoplastic nature of polycarbonates.

It involves softening a length of the sheet using a heated strip, such as a hot wire or an electric heater .

The sheet can be heated on one side or both sides, depending on its thickness .

Double-sided heating is recommended for sheets thicker than 3mm .

The heated region becomes pliable enough to be bent to the desired angle at temperatures between 155oC and 165oC .

It is important to test the hot line bending setup with a small sample before bending the larger sheet to ensure efficacy and check for any compromise in the sheet's integrity .

Hot bending is a relatively simple forming method, but it is also a frequently used method to obtain parts that are bent along an axis. These parts are often used for machine guard plates and the like. A radiant heater (such as an infrared emitter or a resistance heater) can be used to heat the bending line of the sheet. Usually, the temperature required for this simple thermoforming is 150-160℃, and it is usually not necessary to pre-dry (if the forming temperature is high) It must be pre-dried, and you should try it with a small board first).

When heating on one side, the plate should be rotated continuously in order to obtain a uniform heating effect. When the appropriate plate temperature is reached, remove the plate from the heater and maintain the pressure until the plate is bent to the required angle. For higher requirements and hot bending of 3mm or more plates, the double-sided heating effect is better.