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Photosensitive material pulsation release method and device

A photosensitive material and sensitive material technology, which is applied in manufacturing auxiliary devices, additive manufacturing, processing and manufacturing, etc., can solve the problems of affecting accuracy, difficulty in increasing the speed of resin reflow, and increasing cost, so as to reduce the deformation of the model under tension and improve the reflow. Speed, the effect of improving printing speed

Active Publication Date: 2021-03-16
YUANZHI TECH SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The release process in a photo-curing 3D printing device with a constrained liquid surface often determines a series of key characteristics such as printing speed and accuracy. In the traditional photo-curing printing process with a lower light source, the platform is generally moved up and then returned to its position. The model is separated from the release film by setting the layer thickness distance, the separation speed is slow, and the model bears the separation force during the separation process, which is easy to deform and affects the accuracy
If the method of tilting the release film first can increase the separation speed, but for the resin to flow back, the platform still needs a relatively large lifting height, and the model may still be subject to a large pulling force, which may easily cause the model to deform and affect the accuracy.
If the photopolymerization inhibitor is used to form a dead zone on the surface of the release film to avoid the bond between the model and the release film, the separation speed can be increased, but for larger models, the speed of resin reflow is difficult to increase due to the thin dead zone. It is still difficult to achieve fast printing and separation of large models, and due to the need to control inhibitors and material semi-permeable membranes, the printing device is complicated and the cost is greatly increased

Method used

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  • Photosensitive material pulsation release method and device
  • Photosensitive material pulsation release method and device
  • Photosensitive material pulsation release method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Example 1, figure 1 and figure 2 A light-curing printing device is shown, and the light-transmitting member and the cylinder liner 2 are fixedly and hermetically connected to form a printing working area equipped with a photosensitive material 5 . The light-transmitting member 30 can adopt a light-transmitting release film 33 (see Figures 7 to 11 ), the surface of the transparent release film 33 in contact with the photosensitive material 5 is the release surface 32 . And control the pressure and / or volume of the photosensitive material 5, when the photosensitive material 5 is the printing working pressure P1, or when it is the set volume, the release film 33 is in a flat state, and the platform 1 or model 51 and the release surface 32 is the preset distance, the light-transmitting member 30 is in the printing position, such as figure 1 As shown, the light beam 39 emitted by the light source 37 passes through the release film 33 and selectively irradiates the photo...

Embodiment 2

[0070] Example 2, Figure 7 It is a three-dimensional structure diagram of another embodiment, indicating that the light source 37 is placed on top, the light-transmitting member 30 includes a release film 33 , and the other side opposite to the photosensitive material 5 is provided with a support plate 35 that can transmit light in at least the middle area. There is a preset gap between the support plate 35 and the release film 33, which can limit the amount of deformation of the release film 33 under the action of the pressure P2. When the release film 33 is attached to the support plate 35, due to the support plate 35 The supporting effect makes the release film 33 stop further deformation, that is, it can prevent the release film 33 from excessive deformation and damage, and it is also beneficial to increase the pressure P2 of the photosensitive material 5 during the release process, and increase the separation speed between the model 51 and the release surface 32 . A pre...

Embodiment 3

[0071] Example 3, Figure 8-Figure 11 It illustrates another embodiment of a photocuring three-dimensional printing device. The light-transmitting member adopts a release film 33, and the other side of the release film 33 relative to the photosensitive material 5 or the model 51 is a support plate 35, and the middle part of the support plate 35 is a transparent areas of light, such as Figure 8 The area between the two vertical dashed lines in . At least a gap is provided between the release film 33 and the support plate 35 in the light-transmitting area, and the outer edge of the support plate 35 can protrude toward the direction of the release film 33. When the release film 33 is installed on this raised end face There is a preset gap between the transparent areas in the middle of the support plate 35 . The outer edge of the support plate 35 protrudes to press the release film against the end of the cylinder liner 2, and the release film 33 cooperates with the end of the c...

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PUM

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Abstract

The invention relates to a photosensitive material pulsation release method. A light beam selectively irradiates a photosensitive material through a light-transmitting part to print a forming model layer by layer in a working cavity, and the model and the light-transmitting part can be controlled to relatively move away from each other by a preset distance in a layer-by-layer printing process; inthe layer-by-layer printing process, the pressure intensity of the photosensitive material is controlled, so that the light-transmitting part is alternated between a printing working position and a stripping working position; when the pressure intensity of the photosensitive material is controlled to be the printing working pressure intensity, the light-transmitting part is located at the printingworking position, the light-transmitting part is in a flat state, a preset gap is formed between the light-transmitting part and the model, and the light beam selectively irradiates the photosensitive material through the light-transmitting part for photocuring layer printing; and when the pressure of the photosensitive material is controlled to be increased, the part, attached to the model, of the light-transmitting part moves towards the other side opposite to the model, and the light-transmitting part reaches the stripping working position and is stripped from the model. By means of the photosensitive material pulsation release method, the separation speed between the light-transmitting part and the model can be increased, and the three-dimensional printing speed and the printing precision are improved.

Description

technical field [0001] The invention belongs to the technical field of photocuring three-dimensional printing, and in particular relates to a method and device for pulsating release of a photosensitive material. Background technique [0002] The release process in a photo-curing 3D printing device with a constrained liquid surface often determines a series of key characteristics such as printing speed and accuracy. In the traditional photo-curing printing process with a lower light source, the platform is generally moved up and then returned to its position. The model is separated from the release film by setting the layer thickness distance, the separation speed is slow, and the model bears the separation force during the separation process, which is easy to deform and affects the accuracy. If the method of tilting the release film first can increase the separation speed, but for the resin to flow back, the platform still needs a relatively large lifting height, and the mod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/124B29C64/20B29C64/188B29C64/30B29C64/393B33Y10/00B33Y30/00B33Y40/00B33Y50/02
CPCB33Y10/00B33Y30/00B33Y40/00B33Y50/02B29C64/124B29C64/188B29C64/20B29C64/30B29C64/393
Inventor 季鹏凯
Owner YUANZHI TECH SHANGHAI CO LTD