3D printer hotbed, 3D printer and heating control method

Abstract

The invention provides a 3D printer hotbed, a 3D printer and a heating control method. The 3D printer hotbed comprises a base plate; a plurality of heating modules staggered on the base plate and used for heating different areas of the base plate; driving modules electrically connected to the heating modules separately so as to drive each heating module for heating according to the received driving signals; a controller connected to the driving modules through a signal line or a wireless communication unit so as to transmit diving signals to the driving modules. According to the technical scheme of the invention, the heating areas can be flexibly adjusted according to the shape of an actual initial print area, and the heating power is adjusted in time according to the temperature feedback of the print area; and the temperature equilibrium of the hotbed surface and the temperature control flexibility are improved, and at the same time the energy consumption is reduced.

Description

Technical field [0001] The present invention relates to the technical field of 3D printing, in particular to a 3D printer hot bed, a 3D printer and a heating control method. Background technique [0002] The hot bed is one of the main functional components of the Fused Deposition Modeling (FDM) 3D printer. It is not only a physical platform that carries the printed object, but also the object of the initial deposition effect. In order to make the high-temperature molten material spit out by the extruder of the 3D printer form a thin and flat initial printing surface on the hot bed, and to ensure that the printing surface is firmly bonded to the surface of the hot bed, 3D printers generally use constant temperature heating control for the hot bed. Since the high-temperature molten 3D printing material is directly ejected onto the low-temperature cold printing platform, not only can it not be reliably bonded, but the sharp change in temperature will cause the initial printing surfa...

AI Technical Summary

Problems solved by technology

[0004] (1) The temperature is not balanced. Since the installation points of the temperature sensitive resistor and thermocouple are very small, and the plane area and lateral thermal resistance of the hot bed are large, the constant temperature control process only uses the local point temperature as the control feedback, resulting in the surface of the hot bed uneven temperature distribution

[0005] (2) High energy consumption. Even if the initial printing surface of the printing object is small, the heating bed must be heated as a whole, resulting in high heating energy consumption

[0006] (3) The flexibility of temperature control is poor. Different areas of the hot bed have different heat dissipation conditions depending on whether there are printed objects or not. A single heating element cannot adjust the local heating power for local temperature deviations.

Especially when the temperature sensitive resistor and thermocouple are installed outside the initial printing area, the initial printing surface will not get effective temperature feedback, which will affect the 3D printing effect

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