A mold conveyance roller unit includes: a rotatable roller main body on which a mold is to be placed; a roller support member that rotatably supports the roller main body; a base member to which the roller support member is attached together with the roller main body in a manner capable of vertical motion; and a resilient member that is fitted between the base member and the roller support member to elastically press the roller support member toward above the base member.

A feed device for a conveyor system for preforms which transports the preforms coming in an ordered manner from an upstream module of the conveyor system to a downstream module of the conveyor system in which the preforms are separated into singles, wherein the feed device has at least two oppositely arranged transport rails, on which the preforms rest in each case with a support ring. The feed device additionally includes at least two oppositely arranged belt transport units which preferably engage with a threaded portion of the preforms and transport them in a transport direction to the downstream module of the conveyor system, wherein the belt transport units each have a drive which applies a torque to the preforms accumulated in front of the downstream module, which torque the individual preforms are able to be transferred in a more reliable manner from the feed device into the downstream module.

A feed device for a conveyor system for preforms which transports the preforms coming in an ordered manner from an upstream module of the conveyor system to a downstream module of the conveyor system in which the preforms are separated into singles, wherein the feed device has at least two oppositely arranged transport rails, on which the preforms rest in each case with a support ring. The feed device additionally includes at least two oppositely arranged belt transport units which preferably engage with a threaded portion of the preforms and transport them in a transport direction to the downstream module of the conveyor system, wherein the belt transport units each have a drive which applies a torque to the preforms accumulated in front of the downstream module, which torque the individual preforms are able to be transferred in a more reliable manner from the feed device into the downstream module.

A coal dropping impact energy buffer monitoring device and method for a coal mine belt conveying system. The device comprises a buffer belt roller group, a buffer bracket, buffer springs, impact energy collecting dampers, a signal converting and sending device, and an installation bottom board, the buffer belt roller group being fixed to the buffer bracket, the upper ends and the lower ends of the buffer springs and the impact energy collecting dampers being respectively connected to the buffer bracket and the installation bottom board, and the impact energy collecting dampers being connected to the signal converting and sending device fixed to the installation bottom board through guide lines.

A coal dropping impact energy buffer monitoring device and method for a coal mine belt conveying system. The device comprises a buffer belt roller group, a buffer bracket, buffer springs, impact energy collecting dampers, a signal converting and sending device, and an installation bottom board, the buffer belt roller group being fixed to the buffer bracket, the upper ends and the lower ends of the buffer springs and the impact energy collecting dampers being respectively connected to the buffer bracket and the installation bottom board, and the impact energy collecting dampers being connected to the signal converting and sending device fixed to the installation bottom board through guide lines.

A high angle conveyor includes a frame, a lower conveyor belt, an upper conveyor belt, and a pressing assembly. The pressing assembly includes a bracket coupled to the frame, a roller supported on the bracket, a spring support coupled to the frame, a spring positioned between the bracket and the spring support, and a spring retainer coupling the spring to at least one selected from the group of the frame, the bracket, and the spring support. The spring urges the bracket and the roller toward the upper conveyor belt such that the pressing assembly biases the upper conveyor belt toward the lower conveyor belt.

A high angle conveyor includes a frame, a lower conveyor belt, an upper conveyor belt, and a pressing assembly. The pressing assembly includes a bracket coupled to the frame, a roller supported on the bracket, a spring support coupled to the frame, a spring positioned between the bracket and the spring support, and a spring retainer coupling the spring to at least one selected from the group of the frame, the bracket, and the spring support. The spring urges the bracket and the roller toward the upper conveyor belt such that the pressing assembly biases the upper conveyor belt toward the lower conveyor belt.