Heat preservation protective cover and heat preservation protective device of 3D printer

Abstract

The invention belongs to the technical field of 3D printing, and discloses a heat preservation protective cover. The protective cover comprises a plurality of compressible and stretchable heat preservation units which are connected in sequence, the section of any heat preservation unit in the length direction of the heat preservation unit is in a regular hexagon shape, the corresponding side surfaces of every two adjacent heat preservation units are partially or completely overlapped, and reinforcing units which are used for reinforcing the strength of the heat preservation units and improvingthe thermal insulation performance is arranged in the at least partial heat preservation units. The heat preservation protective cover is particularly suitable for printing large-size products of large-size 3D printers, the structure rigidity is good, compression and stretching are easy, and excellent thermal insulation and anti-toppling functions are achieved. The invention further discloses a heat preservation protective device of the 3D printer at the same time. The heat preservation protective device is suitable for printing the large-size products.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular to a thermal insulation protective cover and a thermal insulation protection device for a 3D printer. Background technique [0002] The 3D printer based on the fused deposition rapid prototyping process uses plastic filaments with a diameter of about 1-2 mm, and melts and extrudes the plastic filaments into filaments of about 0.2-0.4 mm through a computer-controlled printing extrusion head and scans them layer by layer. Print stacks into three-dimensional objects. Different materials for 3D printing have different printing environment requirements: PLA, a common printing material, can be printed stably at room temperature, while ABS is susceptible to large shrinkage and deformation due to temperature changes, and requires a molding space temperature condition of 60°C to 80°C Stable printing can only be achieved under low temperature conditions. Since the temperature of the form...

AI Technical Summary

Problems solved by technology

Different materials for 3D printing have different printing environment requirements: PLA, a common printing material, can be printed stably at room temperature, while ABS is susceptible to large shrinkage and deformation due to temperature changes, and requires a molding space temperature condition of 60°C to 80°C Stable printing can only be achieved under low temperature conditions. Since the temperature of the forming space is not high when printing such materials, the printer can meet the requirements by installing an ordinary shell to achieve overall sealing; while some high-temperature materials require a higher temperature in the forming space when printing stably, and heating is required. The device heats the molding space to a constant high temperature state. Since the print head needs to move and work in the molding space, and the moving parts cannot work at such a high temperature for a long time, the general sealing method of the shell can no longer meet the requirements. High temperature resistant, The retractable heating and heat preservation protection device realizes the precise heating and heat preservation of the forming space, and isolates the moving parts from the high temperature forming space

[0003] Existing 3D printers’ high-temperature-resistant and retractable protective devices all use a wave-shaped organ shield, which is prone to problems such as the collapse of the protective device during the printing process, especially when the protective device has a large span. Most of the reasons are Due to the poor structural design of the retractable protective device, the lateral rigidity is insufficient. Generally, several support frames are arranged at intervals to enhance the insufficient lateral rigidity.

However, due to the V-shaped structural characteristics of the wave-shaped protective cover and the error in the installation position of the supporting frame, the center of gravity of the V-shaped wave-shaped protective cover will shift with the movement during the telescopic movement, resulting in partial dumping, which shortens the effective stroke of the print head. and the thermal insulation effect of the printer, eventually leading to printing failure

CN106584856A discloses a protective cover for 3D printers. It uses a double-layer retractable wave-shaped protective cover structure. Although it has a good heat preservation effect, the structure is complicated and takes up space, and it is impossible to avoid the protective device under the condition of large-span use. The emergence of collapse and dumping problems

This device can meet the heating requirements of the small-sized 3D printer's forming space, but it takes a long time to reach a constant high temperature state for heating the large-sized forming space, and it is difficult to achieve precise temperature control of important areas, which affects the 3D printer. Excellent forming efficiency and printing quality

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