The invention includes methods and apparatus for demolding a tread from a mold. In particular embodiments, such methods include a step of demolding a first end of a tread from a mold to form a demolded portion of the tread, the tread extending lengthwise from the first end to a second end. A further step includes folding the tread such that at least a portion of the demolded portion is arranged overtop a portion of the tread remaining within the mold. Yet a further step includes applying lubricant to the tread to thereby lubricate relative translation between folded portions of the tread. A further step includes demolding additional portions of the tread by sliding at least a portion of the demolded portion along the portion of the tread remaining in the mold with the lubricant arranged between the demolded portion and the portion of the tread remaining within the mold.

A hydraulic advancement/postponement assembly is operably coupled to a first ejector plate and to a second ejector plate. The hydraulic advancement/postponement assembly includes a first hydraulic cylinder having a first housing defining a first volume and a first piston, the first housing connected to the first ejector plate and the first piston connected to a fixed element. The hydraulic advancement/postponement assembly includes a second hydraulic cylinder disposed in fluid communication with the first hydraulic cylinder, the second hydraulic cylinder having a second housing defining a second volume and a second piston, the second housing connected to the first ejector plate and a second piston connected to the second ejector plate.

An apparatus for taking out a molded product that is capable of suppressing displacement vibration of an attachment in a shorter time than ever without using a large-scaled electric actuator. An active controller performs active control in conjunction with the positioning, control by the servomotor. At the beginning of the active control, the positioning control is primarily performed by the servomotor, and then the active control is positively performed by the active controller using an electric actuator. Compared with when only the active control is performed for vibration suppression, a lighter and smaller electric actuator can be employed.

An apparatus for taking out a molded product that is capable of suppressing displacement vibration of an attachment in a shorter time than ever without using a large-scaled electric actuator. An active controller starts active control after the amplitude of displacement vibration of the take-out head as an attachment has been attenuated to a predetermined setting by means of positioning control by a servomotor or when the amplitude can be considered as having been attenuated to the predetermined setting. The positioning control is first performed by the servomotor, and then the active control is performed by the active controller using an electric actuator which is light in weight and small in size.

A three-dimensional printing system for printing out an object includes a support plate, a delivery module, one or multiple printing devices, and an object detaching member. The delivery module includes a belt covering the support plate. The belt includes a printing area above the support plate and a separation section of the support plate. The printing device is arranged corresponding to the support plate. The object is formed layer by layer in the printing area via the printing device and is moved with the belt. The object detaching member is arranged under the belt and between the support plate and the separation section. The object detaching member includes an abutment portion abutted against the belt. The abutment portion is at a position higher than the separation section to form a height level difference.

The disclosure provides a three-dimensional printing device and a three-dimensional printing method. The device includes a controller, a tank and a printing platform. The controller performs a three-dimensional printing operation according to a slice file, and judges the magnitude of shear force corresponding to a slice object in the slice file to determine a specific rotating angle. A carrying surface of the printing platform faces a bottom surface of the tank. When the controller performs the three-dimensional printing operation, the printed object corresponding to the slice object is formed between the carrying surface of the printing platform and the bottom surface of the tank. The controller controls the printing platform to move away the tank by a default vertical distance, and controls the tank to rotate by a specific rotating angle, such that the printed object is removed from the bottom surface of the tank.

In the method and the apparatus for releasing a molded article from a mold according to the embodiments, the lateral of the molded article in the mold is pressed, so that it is possible to minimize the damage of the mold and the molded article at the time of the release, while the amount of a mold release agent used is minimized.

The present invention provides a manufacturing device and a manufacturing method for molds. The manufacturing device includes a molding assembly including a mold table and a male mold. The mold table has an upper surface defining a depression thereon, and the male mold is configured to be disposed on a bottom surface of the depression. A height of the male mold is smaller than a depth of the depression. This manufacturing device can utilize a transfer molding method to manufacture molds in batches with higher mold production efficiency.

A method of estimating a normal vector to an attachment mounted to an approach frame of an apparatus for taking out a molded product and a normal vector to a die mounted to a molding machine is provided. A normal vector to a take-out head is estimated through computation using a coordinate/depth determination section and a normal vector computation section on the basis of depth data or coordinate data on three mounting members. Three or more extending portions are specified from the image, the extending portions being each a part of a fixed die or a movable die or a part of a surrounding component and extending in a direction that coincides with the open direction for the dies. A normal vector to the die is estimated through computation on the basis of the depth data or coordinate data on the specified extending portions.

A photocuring type 3D printer (4) includes a sink (41) for containing a forming liquid (40), a glass layer (42) disposed on the sink (41), a membrane (43) disposed above the glass layer (42), an emitting unit (46) disposed below the sink (41), and a forming platform (45) arranged to immerse in the forming liquid (40) for constructing a model (5). The 3D printer (4) further includes an adjusting unit (44) disposed at one side of the sink (41). One end of the membrane (43) is connected to the adjusting unit (44), and another end of the membrane (43) is connected to the other side of the sink (41) opposite to the adjusting unit (44). The 3D printer (4) controls the adjusting unit (44) to execute homing for tightening the membrane (43) before solidifying the model (5) and controls the adjusting unit (44) to move for relaxing the membrane (43) after the model (5) is solidified, and controls the forming platform (45) to move after the membrane (43) is relaxed for peeling the model (5) from the membrane (43).