Lab Two Roll Mill Machine

AmadeTech laboratory-type rubber mixing mill features two parallel rolls of the same size that can rotate inwards in opposite directions. Two rolls have heating and cooling functions under control. You can customize the size of the rolls according to your test needs. The roll on the operator’s side is called the front roll, and its position can be adjusted horizontally within a preset range. The other roll is called the rear roll, and its position is fixed.

When rotating, the speed of the two rolls is different. The rear roll rotates faster than the front one to produce an intended shearing force. The regular ratio of the peripherical speeds of the rolls is about 1.2:1. The friction ratio and the shearing force are positively correlated. Based on different configurations (single or dual motor), this ratio is fixed or adjusted yourself according to the test requirements. The roll speed is allowed to be adjusted within the default range. Prior to the test, you are required to manually or electrically adjust the distance between the two rolls to achieve the desired sheet thickness of the compound.

• The roll is made of KDB high-carbon steel with a high-temperature quenching treatment.
• The surface is plated with high-hardness chrome and mirror polished, whose hardness is up to 60 HRC. (thickness of chrome plating is 0.1 mm)
• A built-in heating device to heat the roll evenly to a preset value. (Supports electric/oil/steam heating)
• The roller inside is drilled to allow the circulating water to flow to achieve cooling purposes.
• Supports auto reverse and quick ejection (optional) of the rolls once pressing the emergency stop.

• With manual roll nip adjustment devices to adjust the distance between the two rolls (The electric adjustment is optional).
• The metal disc with slots can accept up to 8 points as the starting point of turning, which greatly facilitates the operation.
• The extended handle uses the principle of leverage to achieve a labor-saving effect.
• The distance between the rolls is accurately displayed on the corresponding meter for easy adjustment.

• The control interface consists of physical keys and digital screens.
• PLC + touch screen are optional.
• Japanese RKC thermostats are used, and the temperature can be preset and displayed in real time.
• Front and rear roll speeds can be set independently if double FM is configured.
• Reasonable button layout, convenient operation, and user-friendly.

• The side in front of the operator is equipped with 2 pressure-sensitive gates.
• The operator can tap the gate with either knee in an emergency.
• The roller will automatically stop rotating and reverse 1/4 turn to eliminate the danger once the gate is tapped.
• In addition, multiple safety measures, such as protective brackets over the rolls with the emergency stop function, can be added to our open mixing mills.

In addition to the mainstream electric heating and oil heating two rolling mills, we also provide lab roller mills that use steam to heat the rolls. An interface is reserved for each roll to connect to the steam source you prepare. When the external steam circulates into the roll to heat it, the temperature detection device will transmit the temperature information in real time and display it on digital screens, which is convenient for you to monitor and control the temperature. The rolls also support water cooling if required. Like regular heating models, you can customize various parameters, functions, and safety features, such as roll sizes, roll friction ratio, control method, etc.

In order to meet the needs of high-end use, we also provide PLC automatic two roll mixing mills. The machine is equipped with German Siemens PLC and a high-definition touch screen to replace the traditional button-type control panel. Various real-time parameters and command switches are integrated on the screen, including real-time roll temperature, roll nip, roll speed, roll friction ratio, power switch, reset, cooling instructions, etc. With the support of PLC, it is possible to install more personalized configurations, such as a device that can electrically adjust the distance between the two rolls.

PLC offers the possibility of adding more advanced configurations, such as the automatic material turning system, which features a rotatable head that can move horizontally left and right. When the rolls are fed and running normally, the head on the device replaces the scraper held by the operator, automatically approaches, and rests on the surface of the font roll under the control of a preset program. It is able to move from either end of the roll to the other end folding the rubber mixture and automatically reciprocating until the mixing operation is complete. This humanized design improves machine operation’s convenience and safety, liberates the operator’s hands, reduces labor intensity, and improves work efficiency.

For further safety considerations, we are available to equip the rear roll with an extra safety feature named roll ejection device if required. This device consists of two hydraulic units connected to both ends of the rear roll. It allows a quick-action of opening for the roll once triggering any of the emergency stop switches on the mill. In case the operator’s hand gets stuck in the rolls, this hydraulic device can help in minimizing the injury to the body to the utmost extent.