A heat press includes a clutch and a linkage that moves the upper platen relative to the lower platen from a first position to a second position. The distance between the upper and lower platen is less in the second position than in the first position. The clutch is coupled to the linkage and mounted to the upper platen. The clutch is configured to adjust the distance between the upper and lower platens in the second position in response to movement of the upper platen from the first position to the second position being impeded by a work piece positioned between the lower platen and the upper platen.

A heat press includes a clutch and a linkage that moves the upper platen relative to the lower platen from a first position to a second position. The distance between the upper and lower platen is less in the second position than in the first position. The clutch is coupled to the linkage and mounted to the upper platen. The clutch is configured to adjust the distance between the upper and lower platens in the second position in response to movement of the upper platen from the first position to the second position being impeded by a work piece positioned between the lower platen and the upper platen.

A heat press includes a clutch and a linkage that moves the upper platen relative to the lower platen. A first link is pivotably coupled to the base and pivotably coupled to an intermediate link. The intermediate link can rotate in a first rotational direction from a first rotational position to a second rotational position. A first clutch member can be coupled to the intermediate link. A second clutch member can be mounted to the upper platen for common movement with the upper platen. When the intermediate link is in the first rotational position, the clutch can be disengaged to permit relative movement in the clamping direction between the first and second clutch members. When the intermediate link is in the second rotational position, the clutch can be engaged to inhibit relative movement between the first and second clutch members.

A heat press includes a clutch and a linkage that moves the upper platen relative to the lower platen. A first link is pivotably coupled to the base and pivotably coupled to an intermediate link. The intermediate link can rotate in a first rotational direction from a first rotational position to a second rotational position. A first clutch member can be coupled to the intermediate link. A second clutch member can be mounted to the upper platen for common movement with the upper platen. When the intermediate link is in the first rotational position, the clutch can be disengaged to permit relative movement in the clamping direction between the first and second clutch members. When the intermediate link is in the second rotational position, the clutch can be engaged to inhibit relative movement between the first and second clutch members.

A spindle drive having a spindle, a spindle nut which is arranged on the spindle, a housing which surrounds the spindle nut, and an overload clutch which is arranged in the housing. The spindle nut and the housing are connected to one another via the overload clutch. The overload clutch is set up to disconnect the spindle nut from the housing in a torque-free manner if a defined overload torque which acts between the spindle nut and the housing is exceeded.

A spindle drive having a spindle, a spindle nut which is arranged on the spindle, a housing which surrounds the spindle nut, and an overload clutch which is arranged in the housing. The spindle nut and the housing are connected to one another via the overload clutch. The overload clutch is set up to disconnect the spindle nut from the housing in a torque-free manner if a defined overload torque which acts between the spindle nut and the housing is exceeded.

A press machine comprises a moveable press ram, an actuator, a first motor system, a second motor system, and a belt system. The moveable press ram holds a tool that forms a part. The actuator linearly moves the moveable press ram by use of a male-female thread mechanism. The actuator includes an actuator sprocket coupled to the male-female thread mechanism. The first motor system produces a high-force linear movement condition to the press ram, and includes a clutch coupled to a first motor and a first motor sprocket coupled to the clutch. The second motor system produces a high-speed linear movement condition to the press ram. The belt system couples the actuator sprocket, the first motor sprocket, and the second motor sprocket. The clutch allows the first motor to partially or fully disengage from rotational movement of the first sprocket when the belt is being driven by the second motor.

A press machine comprises a moveable press ram, an actuator, a first motor system, a second motor system, and a belt system. The moveable press ram holds a tool that forms a part. The actuator linearly moves the moveable press ram by use of a male-female thread mechanism. The actuator includes an actuator sprocket coupled to the male-female thread mechanism. The first motor system produces a high-force linear movement condition to the press ram, and includes a clutch coupled to a first motor and a first motor sprocket coupled to the clutch. The second motor system produces a high-speed linear movement condition to the press ram. The belt system couples the actuator sprocket, the first motor sprocket, and the second motor sprocket. The clutch allows the first motor to partially or fully disengage from rotational movement of the first sprocket when the belt is being driven by the second motor.

The present invention relates to a mini hot press apparatus, and more particularly, to an apparatus which can be used for making or annealing a polycrystalline material by pressurization and heating in various surrounding environments such as in a low vacuum, high vacuum, ultrahigh vacuum, high pressure gas, gas flow, even in air, etc.

A clutch includes: a first clutch tooth that rotates integrally with a first rotation element included in a speed reducer; a second clutch tooth that rotates integrally with a second rotation element included in the speed reducer; and a fixed clutch tooth that moves between the first clutch tooth and the second clutch tooth. The fixed clutch tooth includes: a first mode in which the speed reducer operates at a second reduction ratio by meshing only with the first clutch tooth to fix the first rotation element, a second mode in which the speed reducer operates at a first reduction ratio by meshing only with the second clutch tooth to fix the second rotation element, and a both-engaging mode of meshing with each of the first clutch tooth and the second clutch tooth when changing a mode between the first mode and the second mode.