阅读说明：本技术 脱模治具及脱模方法 (Demolding jig and demolding method ) 是由 凌文兵 杨湾湖 黄鹤源 桂培炎 于 2019-09-02 设计创作，主要内容包括：本发明公开了一种脱模治具以及脱模方法,其中所述脱模治具包括集液盘、连接罩和承托槽,所述集液盘位于所述脱模治具的底部,用于收集残留的树脂；所述连接罩分别位于所述脱模治具的左侧与右侧,并且所述连接罩分别自所述集液盘的两个侧边向上延伸；所述承托槽分别位于所述脱模治具的左侧与右侧,并且所述承托槽位于所述连接罩的顶部,所述承托槽用于供3D打印装置的成型平台的侧边插入并卡合。采用本发明的脱模治具以及脱模方法,使得脱模工序易于操作,并且避免残留的树脂污染工作台。(The invention discloses a demoulding jig and a demoulding method, wherein the demoulding jig comprises a liquid collecting disc, a connecting cover and a supporting groove, wherein the liquid collecting disc is positioned at the bottom of the demoulding jig and is used for collecting residual resin; the connecting covers are respectively positioned on the left side and the right side of the demolding jig, and extend upwards from the two side edges of the liquid collecting disc respectively; the supporting groove is respectively located on the left side and the right side of the demolding jig, the supporting groove is located at the top of the connecting cover, and the supporting groove is used for allowing the side edge of a forming platform of the 3D printing device to be inserted and clamped. By adopting the demolding jig and the demolding method, the demolding procedure is easy to operate, and the workbench is prevented from being polluted by residual resin.)

1. The utility model provides a demolding jig which characterized in that, demolding jig includes:

the liquid collecting disc is positioned at the bottom of the demolding jig and used for collecting residual resin;

the connecting covers are respectively positioned on the left side and the right side of the demolding jig and respectively extend upwards from the two side edges of the liquid collecting disc;

and the bearing groove is respectively positioned on the left side and the right side of the demolding jig, the bearing groove is positioned at the top of the connecting cover, and the bearing groove is used for inserting and clamping the side of the forming platform of the 3D printing device.

2. The demolding jig of claim 1, wherein the drip pan is disposed obliquely, or the surface of the drip pan is a curved surface having a lowest position.

3. The demolding jig of claim 2, wherein the drip pan is further provided with a pouring nozzle located at the lowest end of the drip pan which is obliquely arranged or near the lowest position of the curved surface of the drip pan.

4. The demolding jig as claimed in claim 1, wherein the channel extending direction of the supporting groove is a front-rear direction, the demolding jig further comprises a drainage portion, the drainage portion is located at a front end of the connecting cover in the front-rear direction, and the drainage portion extends substantially in an up-down direction and connects the supporting groove and the drip pan.

5. The demolding jig of claim 4, wherein the flow guide portion is a pipe structure, a guide groove structure or a step structure.

6. The demolding jig of claim 1, wherein a handrail portion is further provided at the top of the demolding jig.

7. The demolding jig of claim 6, wherein the holding groove has a groove bottom surface and two groove wall surfaces, the two groove wall surfaces are substantially horizontal surfaces, the groove bottom surface is substantially vertical surfaces, and the groove bottom surface protrudes outward relative to the connecting cover to form the armrest portion.

8. The demolding jig according to claim 1, further comprising a support groove and a support plate, wherein the support groove is located at the top of the demolding jig and is used for inserting and clamping one corner of the molding platform, and the support plate extends in an up-down direction and is used for supporting the erected molding platform.

9. The demolding jig according to claim 8, wherein the support locking groove has two positions, the extending directions of the channels of the two positions of the support locking groove are collinear, and the extending directions of the channels of the two positions of the support locking groove are approximately along the left-right direction.

10. The demolding jig as claimed in claim 1, wherein the extending direction of the channel of the supporting groove is a front-back direction, and the demolding jig viewed from front to back generally presents an isosceles trapezoid with a narrow upper part and a wide lower part.

11. The demolding jig according to claim 10, wherein an included angle between the outer contour enveloping surface of the left connecting cover and the outer contour enveloping surface of the right connecting cover and the horizontal surface where the supporting groove is located is equal, and the included angle ranges from 75 degrees to 80 degrees.

12. The demolding jig as claimed in any one of claims 1 to 11, wherein the demolding jig is of an integrally molded structure.

13. A method of demolding, comprising:

unlocking a forming platform of the 3D printing device;

inserting the bottom of the forming platform into the supporting groove of the demolding tool as claimed in any one of claims 1 to 12, so that the position of the forming platform is fixed by the demolding tool;

the forming platform and the demolding jig are detached from the 3D printing device together, and the forming platform and the demolding jig are transferred to a working area of a demolding procedure;

and separating the printed part from the forming platform by adopting an ejector rod or a scraper knife.

Technical Field

The invention relates to the technical field of additive manufacturing, in particular to an auxiliary tool in a 3D printing process and a demolding method.

Background

After 3D printing, particularly photocuring 3D printing, is finished, the forming platform and the printed part are still connected together, the forming platform and the printed part need to be transferred to a workbench, and the printed part is detached from the forming platform by using a scraper knife or an ejector rod so as to finish a demolding step and separate the forming platform from the printed part. In the above process, the position of the forming platform cannot be fixed due to the lack of necessary supporting tools, which makes the demolding process very difficult. In addition, residual resin on the forming table or print often contaminates the platen.

Disclosure of Invention

The main object of the present invention is to provide a demolding jig and a demolding method using the same, which can facilitate the operation of the demolding process and reduce the problem that the workbench is usually polluted by the residual resin.

According to a first aspect of the embodiments of the present invention, there is provided a demolding jig including:

the liquid collecting disc is positioned at the bottom of the demolding jig and used for collecting residual resin;

the connecting covers are respectively positioned on the left side and the right side of the demolding jig and respectively extend upwards from the two side edges of the liquid collecting disc;

and the bearing groove is respectively positioned on the left side and the right side of the demolding jig, the bearing groove is positioned at the top of the connecting cover, and the bearing groove is used for inserting and clamping the side of the forming platform of the 3D printing device.

The bearing groove of the demolding jig can be used for the side edge of the molding platform to be inserted and clamped, so that the molding platform in the demolding procedure can be positioned, and the demolding procedure is convenient to operate; the liquid collecting disc at the lower part of the demolding jig can collect residual resin, so that the workbench is prevented from being polluted by the residual resin.

Further, the drip pan is disposed obliquely, or the surface of the drip pan is a curved surface having the lowest position.

Further, the drip pan is also provided with an pouring nozzle, and the pouring nozzle is positioned at the lowest end of the drip pan which is obliquely arranged or is positioned near the lowest position of the curved surface of the drip pan. The pour spout is designed to facilitate the operator to pour the resulting pool of residual resin out of the drip pan.

Furthermore, the channel extending direction of the supporting groove is taken as the front-back direction, the demolding jig further comprises a drainage part, the drainage part is located at the front end of the connecting cover in the front-back direction, and the drainage part extends approximately in the up-down direction and is connected with the supporting groove and the liquid collecting disc. The drainage part is used for promoting residual resin from the forming platform to be collected to a liquid collecting disc below by the bearing groove as soon as possible.

Further, the drainage part is of a pipeline structure, a guide groove structure or a step structure.

Further, the top of the demolding jig is also provided with a handrail part. The handrail part is used for an operator to grab the whole demoulding jig.

Further, the support channel has a channel floor and two channel walls, the two channel walls being substantially horizontal surfaces, the channel floor being substantially vertical surfaces, the channel floor projecting outwardly relative to the attachment housing to form the armrest portion.

Furthermore, the demolding jig further comprises a supporting clamping groove and a supporting plate, the supporting clamping groove is located at the top of the demolding jig and used for allowing one corner of the forming platform to be inserted and clamped, and the supporting plate extends approximately in the vertical direction and is used for supporting the erected forming platform. By means of the supporting clamping grooves and the supporting plates, the forming platform can be erected, and therefore demolding operation can be conducted conveniently by means of tools such as a scraper knife.

Further, the support clamping groove is provided with two positions, the extending directions of the channels of the two positions of the support clamping groove are collinear, and the extending directions of the channels of the two positions of the support clamping groove are approximately along the left-right direction.

Further, the extending direction of the groove of the supporting groove is taken as the front-back direction, and the demolding jig is observed from front to back, and the whole demolding jig is approximately in an isosceles trapezoid with a narrow upper part and a wide lower part. The appearance of the demoulding jig through special design can reduce the problems of side eversion and side bending.

Furthermore, the included angles between the outer contour enveloping surfaces of the left connecting cover and the right connecting cover and the horizontal surface where the bearing groove is located are equal, and the value range of the included angles is 75-80 degrees.

Furthermore, the demolding jig is of an integrally formed structure.

According to a second aspect of embodiments of the present invention, there is provided a method of demolding. The demolding method comprises the following steps:

unlocking a forming platform of the 3D printing device;

inserting the bottom of the forming platform into the bearing groove of the demolding jig in any one of the technical schemes, so that the position of the forming platform can be fixed through the demolding jig;

the forming platform and the demolding jig are detached from the 3D printing device together, and the forming platform and the demolding jig are transferred to a working area of a demolding procedure;

and separating the printed part from the forming platform by adopting an ejector rod or a scraper knife.

Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic structural diagram of a 3D printing system with a demolding jig according to an embodiment of the disclosure;

fig. 2 is a schematic perspective view illustrating a demolding jig according to an embodiment of the disclosure;

FIG. 3 is a perspective view of FIG. 2 from another perspective;

FIG. 4 is a side view of FIG. 2;

FIG. 5(a) is a schematic view of a front view of a demolding jig according to a comparative embodiment;

fig. 5(b) is a schematic diagram of a front view of a demolding tool in one embodiment of the present disclosure;

FIG. 6 is a schematic structural view of an ejector pin according to an embodiment of the present disclosure;

fig. 7 is a schematic view illustrating a state in which the demolding jig and the molding platform are used in cooperation according to an embodiment of the disclosure;

FIG. 8 is a schematic view of a demolding procedure in one embodiment of the present disclosure;

fig. 9 is a schematic view of a demolding procedure in another embodiment of the present disclosure;

fig. 10 is a schematic view of fig. 9 from another perspective.

Reference numerals: in the figure, 10-demoulding jig, 11-supporting groove, 12-connecting cover, 121-mask reinforcing rib, 13-drip pan, 14-drainage part, 15-handrail part, 16-connecting bar, 17-supporting clamping groove, 18-supporting plate, 181-supporting plate reinforcing rib and 19-pouring nozzle; 20-material tray; 30-forming platform, 31-through hole; 40-a locking mechanism; 50-a lifting mechanism; 60-an optical machine; 70-ejector pin, 71-boss.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, and may be, for example, a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship.

The following text will describe a 3D printing system with a demolding jig in one embodiment of the disclosure with reference to the accompanying drawings of fig. 1.

Fig. 1 is a schematic structural diagram of a 3D printing system in one embodiment of the present disclosure. As shown in fig. 1, the 3D printing system includes a demolding jig 10, a tray 20, a forming platform 30, a locking mechanism 40, a lifting mechanism 50 and a light machine 60, wherein the light machine 60 is located at the lowest part of the whole 3D printing system, the tray 20 is located above the light machine 60, the demolding jig 10 and the forming platform 30 are sequentially located above the tray 20, the locking mechanism 40 is arranged at the upper part of the forming platform 30, and the forming platform 30 and the locking mechanism 40 are located at the highest part of the whole 3D printing system. In the embodiment shown in fig. 1, a lifting mechanism 50 is attached to the right end of the forming table 30. The forming platform 30 can be translated in the up-down direction by the up-down translational movement of the lifting mechanism 50. Note that the apparatus shown in fig. 1 is configured at the point in time when the mold-releasing step is to be performed immediately after the 3D printing is completed. The demolding jig 10 itself does not participate in the 3D printing process, and is only used to transfer the molding platform 30 to the workbench of the demolding process. In other words, the schematic structure of the 3D printing system in the 3D printing process can be shown by deleting the demolding jig 10 from fig. 1.

The demolding jig 10 is used for engaging and supporting the molding platform 30. After the forming platform 30 and the demolding jig 10 are engaged with each other, they can be separated from the 3D printing system and transferred to a workbench of a demolding process.

The tray 20 is used for carrying the photosensitive resin liquid, and the tray 20 is located between the optical machine 60 and the forming platform 30 in the up-down direction. The bottom surface of the tray 20 allows light to pass through so that the light emitted by the light engine 60 can penetrate through the bottom surface of the tray 20.

The bottom surface of the molding platform 30 is a molding end surface for carrying the photosensitive resin that has been cured, which is laminated to form a print. The shaped end face is directed toward the projection direction of the light emitted by the light engine 60. After the 3D printing is completed, the printed material is solidified on the molding end surface of the molding platform 30, and the printed material and the molding end surface need to be separated in a demolding process.

The locking mechanism 40 is used to lock and secure the forming table 30. With the locking mechanism 40 in the unlocked state, the forming platform 30 can be separated from the entire 3D printing system.

The lifting mechanism 50 is used for driving the forming platform 30 to move in the up-and-down direction.

The optical engine 60 is a light source device, and the light emitted by the optical engine 60 can cure the photosensitive resin liquid, and the projection direction of the light emitted by the optical engine 60 is aligned with the bottom surface of the forming platform 30.

The following text will describe the demolding jig according to some embodiments of the disclosure with reference to the drawings of the specification and fig. 2-4.

Fig. 2 is a schematic structural view of a demolding jig according to an embodiment of the disclosure, fig. 3 is a schematic perspective structural view of another view angle of fig. 2, and fig. 4 is a side view of fig. 2. As shown in fig. 2, the demolding jig 10 includes a receiving groove 11, a connection hood 12, and a liquid collecting tray 13. The whole demolding jig 10 is substantially U-shaped in the vertical cross section perpendicular to the front-back direction, that is, the demolding jig 10 is an upper opening type. The relative positional relationship among the support groove 11, the connection cover 12, and the drip pan 13 is such that the drip pan 13 is positioned at the lowermost part among the three, the support groove 11 is positioned at the uppermost part among the three, and the support groove 11 and the drip pan 13 are connected by the connection cover 12.

The support slot 11 is located on the top of the connecting cover 12 for the side edge of the forming platform 30 of the 3D printing device to be inserted and engaged. The inner surface of the bracket 11 may be divided into a slot bottom and two slot wall surfaces, the two slot wall surfaces being substantially horizontal surfaces and the slot bottom being substantially vertical surfaces. Therefore, the shape of the support bracket 11 in a vertical section perpendicular to the front-rear direction is a horizontally placed U-shape. It will be understood that the vertical section of the groove 11 may also be C-shaped or have other shapes that facilitate insertion and snap-fit.

As shown in fig. 2, the demolding jig 10 has a left-right symmetric structure, which is left-right symmetric with respect to the neutral vertical cross section. The number of the supporting slots 11 is two. Similarly, the two support brackets 11 are symmetrical left and right with respect to the neutral vertical section, and the notches of the two support brackets 11 are disposed in opposite directions, so that the two sides of the forming platform 30 can be smoothly inserted into the notches of the left and right support brackets 11 of the demolding jig 10. The height of the notches of the two support brackets 11 (the height of the notch defined as the distance of the resin from the liquid collecting tray 13 at the same position below the notch) is the same, and the width of the notch is also the same, so that the forming platform 30 can be kept substantially horizontal after the two sides of the forming platform 30 are inserted into the notches of the left and right support brackets 11. In addition, the longitudinal direction of the receiving slot 11 is the front-rear direction as shown in fig. 2, i.e., the slot of the receiving slot 11 extends in the front-rear direction.

The number of the connecting covers 12 is also two, and the left and right connecting covers 12 are symmetrical with respect to a neutral vertical section of the demolding jig 10. The left and right connecting covers 12 extend upwards from two sides of the liquid collecting tray 13 respectively, and the upper ends of the left and right connecting covers 12 are provided with a left and right supporting brackets 11 respectively. As shown in FIG. 2, the surface of the connecting cover 12 is a curved surface, and the connecting area of the connecting cover and the drip pan 13 is in smooth transition.

As shown in fig. 2, the connecting cover 12 forms a cover structure on the left and right sides of the demolding jig 10, and serves as an enveloping curved surface on the left and right sides of the demolding jig 10, which helps to prevent residual resin from splashing outside in the process of dripping onto the liquid collecting tray 13.

The outer surface of the connecting cover 12 is also provided with a plurality of face guard reinforcing ribs 121, so that the strength of the connecting cover 12 is improved, and the service life of the whole demolding jig 10 is prolonged. The adjacent face guard reinforcing ribs 121 are equally spaced, and the orientation of the face guard reinforcing ribs 121 is matched with the curved shape of the connecting cover 12.

The drip pan 13 is located at the bottom of the demolding jig 10 for collecting the residual resin. As shown in fig. 2, the drip pan 13 is disposed obliquely. Specifically, the surface of the drip pan 13 has a certain inclined angle with respect to the plane on which the uppermost tank wall surfaces of the left and right support brackets 11 are located. In the demolding jig 10 shown in fig. 2, the front end of the surface of the drip pan 13 is slightly higher than the rear end, so that the residual resin will be collected at the rear end of the drip pan 13. Of course, the surface of the drip pan 13 may also be arranged slightly lower at the front end than at the rear end. It will be appreciated that the surface of the drip pan 13 may also be curved, the curved surface having a lowermost position so that the residual resin will pool at the lowermost position.

As shown in fig. 2, the demolding jig 10 has a flow guide portion 14. The drainage part 14 is used for guiding residual resin of the forming platform 30 to flow from the support bracket 11 to the drip pan 13.

During the process of inserting the forming platform 30 into the support slot 11, the front end of the support slot 11 is continuously moved relative to the forming platform 30, which is equivalent to scraping, so that the residual resin on the side of the forming platform 30 is usually accumulated at the front end of the support slot 11. FIG. 2 shows that the drain portion 14 is located at the front end of the connecting cover 12, and the drain portion 14 extends substantially in the vertical direction and connects the receiving slot 11 with the drip pan 13. The drainage parts 14 are two, the two drainage parts 14 are bilaterally symmetrical relative to a neutral vertical section, and the drainage parts 14 are of a guide groove structure along which residual resin can smoothly flow into the surface of the liquid collecting tray 13. It is understood that the drain 14 may also be a pipe structure embedded in the front end of the connection cover 12, along which the residual resin can flow; alternatively, the drain portion 14 has a plurality of steps along which the residual resin can descend to the surface of the drip pan 13.

As shown in fig. 2, the top of the demolding jig 10 further has an armrest portion 15. The armrest part 15 is convenient for an operator to hold the position and transfer the demolding jig 10 together with the molding platform 30. The bottom surface of the supporting slot 11 protrudes outwards relative to the connecting cover 12 to form a handrail part 15, and the protruding structure is convenient for an operator to grab. Alternatively, the armrest portion 15 is a separately provided lug, or the armrest portion 15 is a recessed structure.

The demolding jig 10 is further provided with a supporting clamping groove 17 and a supporting plate 18, the supporting clamping groove 17 is located at the top of the demolding jig 10 and is used for inserting and clamping one corner of the forming platform, and the supporting plate 18 extends approximately in the vertical direction and is used for supporting the erected forming platform 30.

As shown in fig. 2 to 3, the support slot 17 has two positions, the extending directions of the channels of the two support slots 17 are collinear, and the extending directions of the channels of the two support slots 17 are approximately along the left-right direction. The channel of the support bracket 11 extends in a generally forward-rearward direction, so that the channel of the support slot 17 extends in a direction generally perpendicular to the channel of the support slot 11, and the channels of both extend generally in a horizontal plane. The two support clamping grooves 17 are bilaterally symmetrical relative to the neutral vertical section, and the notches of the two support clamping grooves 17 are arranged in opposite directions, so that two corners (for example, a lower left corner and a lower right corner) of the molding platform 30 can be smoothly inserted into the notches of the two support clamping grooves 17. The width and height of the notches of the two supporting slots 17 are the same, and after the two corners of the forming platform 30 are inserted into the notches of the left and right supporting brackets 11, the forming platform 30 can be erected or obliquely erected, but the lowest side edge of the forming platform 30 in the erected state or the obliquely erected state is still kept basically horizontal.

As shown in fig. 2-3, the supporting plate 18 is disposed at the rear portion of the demolding jig 10, and the supporting plate and the drainage portion 12 are respectively located at two ends of the demolding jig 10 in the front-rear direction. Of course, the support plate 18 and the drainage portion 12 may be both located at the front of the demolding jig 10. In order to erect the forming platform 30 as much as possible after standing up, the distance between the support slot 17 and the support plate 18 in the front-back direction of the demolding jig 10 should not be too long.

As shown in fig. 2 to 3, the demolding jig 10 further has a connecting bar 16, the connecting bar 16 extends in the left-right direction, and the connecting bar 16 connects the left and right connecting covers 12, so that the whole demolding jig 10 forms a stable structure. The connecting bar 16 is approximately at or about the same height as the support slot 11. The support plate 18 is mounted to the connecting bar 16 or extends upwardly from the connecting bar 16 as an integral part thereof. The support pallet 18 shown in figure 2 is not erected perfectly vertically and the support pallet 18 is angled approximately 75-85 from the horizontal. All edges of the support pallet 18, especially at the point where the support forming platform 30 is erected, are provided with a rounded corner transition structure to avoid scratching the forming platform 30 by sharp edges. Furthermore, the sharp edges make the contact area at the support location too small, and also the pressure under the action of gravity is too high. The support blade 18 shown in fig. 2 has a notch in the middle region and both left and right end regions in the left-right direction, that is, the support blade 18 has three notch regions in total in the left-right direction, and the support effect is ensured while reducing the material used for the support blade 18.

As shown in fig. 3, the back surface of the supporting plate 18 further has a supporting plate stiffener 181, and the function and the structural form of the supporting plate stiffener are the same as those of the mask stiffener 121, and therefore, the description thereof is omitted.

As shown in FIGS. 3-4, the drip pan 13 is further provided with a pouring nozzle 19, the pouring nozzle 19 being located at the lowermost end of the drip pan 13 which is obliquely arranged. Specifically, the pouring spout 19 is located at the rear end of the drip pan 13, since the drip pan is high in front and low in rear. Of course, the drip pan 13 may be arranged low in front and high in rear so that the pouring nozzle 19 is located at the front end of the drip pan 13. Alternatively, the drip pan 13 is curved with a lowermost position near which the spout 19 is disposed. As shown in fig. 3, the pouring nozzle 19 has a mouth shape to facilitate pouring of the residual resin. It will be appreciated that the pouring spout 19 may also be provided as a through hole with a ball valve or plug. When the residual resin needs to be poured out, an operator can twist the ball valve or pull out the plug, and the residual resin can flow out through the through hole.

The parts of the demolding jig 10 shown in fig. 2 to 4 may be fixedly connected by means of a connecting element, a self-fitting structure, or riveting, and the like, and the fixed connection may be a detachable connection or a non-detachable connection. Preferably, the demolding jig 10 is an integrally molded structure. For example, the demolding jig 10 itself is made by 3D printing. More specifically, the demolding jig 10 is integrally formed by photocuring 3D printing a photosensitive resin material.

As shown in fig. 2, the left and right connecting covers 12, the drip pan 13, and the connecting bar 16 form a substantially isosceles trapezoid in a front view from the front to the rear. Specifically, the distance between the left and right connecting covers 12 in the left-right direction is smaller than the length of the drip pan 13 in the left-right direction, and the entire structure has a shape that is narrow at the top and wide at the bottom. The inclined included angles between the outer contour enveloping surfaces of the left connecting cover 12 and the right connecting cover 12 and the horizontal plane where the bearing groove 11 is located are equal, so that the visual impression of an isosceles trapezoid with a narrow upper part and a wide lower part is formed in the front view of the whole demolding jig 10.

Fig. 5 is a schematic diagram showing a front view of a demolding jig, in which fig. 5(a) is a schematic diagram showing a front view of a demolding jig as a comparative technical solution, and fig. 5(b) is a schematic diagram showing a front view of a demolding jig as an embodiment of the present disclosure. It is understood that fig. 5(a) and 5(b) are schematic views, and do not reflect the actual structure of the demolding jig. In fig. 5(a), the front view of the whole demolding jig 10 is rectangular, that is, the outer contour enveloping surfaces of the left and right connecting covers 12 are vertical, so that the included angles between the outer contour enveloping surfaces and the horizontal plane where the supporting groove 11 is located are right angles; in fig. 5(b), the inclined included angles between the outer contour enveloping surfaces of the left and right connecting covers 12 and the horizontal plane where the supporting groove 11 is located are both alpha. In comparison with fig. 5(a) and 5 (b): when the angle α is a right angle, the demolding jig 10 may have a problem of side eversion, further causing the molding platform to be clamped into the demolding jig 10; if α is too small, the component force F of the pressure F₂Larger, will cause the side of the demolding jig 10 to bend.

Fig. 6 is a schematic structural view of an ejector rod used in cooperation with the demolding jig in the embodiment of the disclosure. As shown in fig. 6, the bottom of the ejector pin 70 is provided with a plurality of protrusions 71, and the shape, size and spacing of the protrusions 71 are matched with the through holes (see the through holes 31 in fig. 7, 9 and 10) on the forming platform 30. The raised portion 71 of the ejector pin 70 is adapted to pass through a through hole in the forming table 30 and eject a print member attached to the forming table 30 downward so as to be detached from the forming table 30. Fig. 6 also shows the shape of the gripping portion of the ejector pin 70. It can be understood that the shape and structure which is in accordance with the ergonomics and is convenient for the operator to hold can be used as the structural design of the holding part.

Fig. 7 shows a state where the demolding jig is used in cooperation with the molding platform, for example, the demolding jig is transferred to the work table together with the molding platform and a demolding process is pending. As shown in fig. 7, the forming platform 30 has a plurality of through holes 31. As described above, the shape, size, and pitch of the through holes 31 are adapted to the bosses 71.

Fig. 8 shows a state in which the demolding jig, the molding platform, and the ejector pin are used in cooperation, that is, an embodiment of the demolding process. As shown in fig. 8, the protrusion 71 of the ejector pin 70 abuts against the through hole 31 of the forming platform 30, and the operator presses down with force to separate the printed product from the forming platform 30 as soon as possible.

In fig. 8, the left and right sides of the forming platform 30 are inserted into the supporting slots 31, so that the two rows of the left and right through holes are shielded, and cannot be pushed down and lifted by the ejector pin 70 to separate the printing member.

In view of this, fig. 9-10 illustrate another embodiment of the demolding process. As shown in fig. 9-10, the forming table 30 is erected by the cooperation of the support slot 17 and the support blade 18. Specifically, as shown in fig. 10, the lower left corner and the lower right corner of the forming platform 30 are inserted into the two left and right supporting slots 17 of the demolding jig 10, and the back surface of the forming platform 30 is supported by the supporting plate 18, so that the forming platform 30 is raised. In the state shown in fig. 9 to 10, all the through holes 31 of the forming table 30 are exposed to the outside, which facilitates the separation of the printed material from the forming table 30 by the operator. Preferably, the operator separates the print from the forming table 30 using a spatula (not shown).

The embodiment of the disclosure also provides a demolding method. The following text describes the flow steps of the demolding process. The demolding method comprises the following steps:

unlocking a molding platform 30 of the 3D printing device;

the bottom of the forming platform 30 is inserted into the supporting groove 11 of the demolding jig 10 in any of the embodiments described above, so that the forming platform 30 has a supporting groove 11

The position is fixed by a demoulding jig 10;

the forming platform 30 and the demolding jig 10 are detached from the 3D printing device together, and the forming platform 30 and the demolding jig 10 are transferred to a working area of a demolding procedure;

the print is separated from the forming table 30 using an ejector pin 70 or a blade.

Specifically, the demolding process flow is as follows:

1) after printing, the forming platform 30 is driven by the lifting mechanism 50 to move to the highest point;

2) unlocking the forming platform 30 by the locking mechanism 40;

3) the demolding jig 10 is matched with the molding platform 30, and the bottom of the molding platform 30 is inserted into the bearing groove 11 of the demolding jig 10;

4) the operator transfers the demolding jig 10 by means of the armrest portion 15 of the demolding jig 10, thereby also transferring the molding platform 30 at the same time;

5) the print is separated from the forming table 30 using an ejector pin 70 or a blade.

In the description herein, references to the description of "one embodiment," "another embodiment," or "certain embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.