Abstract: A platform structure of 3D printer includes a movable platform (1), a work carrier (2), an electromagnet (3) and a positioning structure (4). Either of the movable platform (1) and the work carrier (2) has a magnetically attractable portion (20). The electromagnet (3) is installed on another of the movable platform (1) and the work carrier (2) and is capable of magnetically attracting the MAP (20) to make the work carrier (2) removably connect to the movable platform (1). The positioning structure (4) includes a first positioning portion (41) formed on the movable platform (1) and a second positioning portion (42) formed on the work carrier (2). The first positioning portion (41) and the second positioning portion (42) engage with each other. Thereby, the platform structure (10) is convenient to use and has a function of fast assembling and dissembling the work carrier (2).

Abstract: An additive manufacturing system may include a carrier, a set of rails coupled to the carrier, and a transition housing movably attached to the set of rails. The additive manufacturing system may include an extruder having an extruder barrel coupled to the transition housing, and a melt pump fixedly attached to the carrier. The melt pump may be in fluid communication with the extruder barrel. Additionally, the additive manufacturing system may include a nozzle in fluid communication with the melt pump, and a roller rotatable about the nozzle.

Abstract: A core puller device for a block machine, a block machine with such a device as well as a method for the preparation of shaped stones in which at least one core puller arranged on the sliding facility of the core puller device is temporarily inserted into a stone mould of the block machine and retracted after a packing operation in the block machine are provided. Here, the core puller device is constructed or the method is configured such that the operative connection between the at least one core puller and the sliding facility of the core puller device is temporarily neutralized.

Abstract: A hamburger mold is provided, which refers to a mold that aims to greatly facilitate the preparation of handmade hamburgers, besides allowing the achievement of hamburgers of several formats, in relation to its thicknesses or containing or no containing fillings. Therefore, the disclosed embodiments present a singular and unique constructiveness, by the fact that the cradle in which the raw material of the hamburger is accommodated, is mobile and stands out from the main body. This feature even reduces or simplifies the cleaning and handling of the present mold for the preparation of hamburgers.

Abstract: A liquid blow molding apparatus including a support pin disposed in a blow mold. The support pin includes a head and a shaft. The support pin is configured to define a gap between the head and a bottom of the preform in a state where the preform is placed in the blow mold and is also configured to support the bottom of the preform at a time of a molding process and to be displaced downward in accordance with deformation of the preform.

Abstract: A stereolithography 3D printer (10) includes: a transporting mechanism (1) having a translucent conveyor belt (11) with its top divided into a discharge area (13) and a receiving area (14); a discharging mechanism (2) installed in the discharge area (13) and including a first material box (21) and a discharge nozzle (22) corresponsive to the first material box (21), and the first material box (21) having a discharge port (211); and a recycling mechanism (3) installed in the receiving area (14) and including a second material box (31) and a receiving sucker tip (32), and the first material box (21) and second material box (31) being disposed adjacent or attached to the translucent conveyor belt (11), and the receiving sucker tip (32) being corresponsive to the second material box (31), and the second material box (31) having a receiving port (311).