Sand amount sensing device of 3D printing sanding device

Abstract

The utility model relates to the technical field of sand mould 3D printers, in particular to a sand quantity sensing device of a 3D printing sand paver, which comprises a sand tank, a suspension type support and a contact type sensing probe, the suspension type support is fixed inside the sand tank and used for storing sand materials, and the contact type sensing probe is fixed inside the sand tank and used for sensing the sand quantity of the 3D printing sand paver. The contact type sensing probe is detachably arranged on the suspension type bracket along the vertical direction and is used for sensing the change of the sand amount in the sand tank; according to the sand amount sensing device of the 3D printing sand paver, the contact type sensing probe is arranged in the sand groove to sense the change of the sand amount in the sand groove, the sand amount in the sand paver can be conveniently detected, meanwhile, the failure rate can be effectively reduced, the stability and reliability of 3D sand mold printing equipment are improved, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sand mold 3D printers, in particular to a sand quantity sensing device for a 3D printing sand spreading device. Background Art

[0002] 3D sand mold printing is a process in which the original sand is mixed with a curing agent and fully stirred, then evenly spread by a sand spreading device, and then the numerical value is sprayed according to the data selection area by a nozzle, and finally a sand shell is formed, such as a sand mold 3D printer disclosed in CN117444144A.

[0003] In a 3D sand mold printer, the main function of the sand spreading device is to evenly lay layer upon layer of sand during the printing process to form the basis of the sand mold. Traditional sand spreading devices usually use the method of weight sensing to control the addition amount of sand. However, due to the high vibration frequency (up to 2000r / min) during the sand spreading process, the measuring instrument under the weight sensing method is very easy to fail, so the failure rate of traditional sand spreading devices is relatively high. Summary of the Utility Model

[0004] In view of this, the utility model provides a sand quantity sensing device for a 3D printing sand spreading device, which senses the change of the sand quantity in the sand tank by arranging a contact type sensing probe in the sand tank, is convenient for detecting the sand quantity in the sand spreading device, can effectively reduce the failure rate, improve the stability and reliability of the 3D sand mold printing equipment, and improve the production efficiency.

[0005] The technical solution of the utility model is realized as follows:

[0006] The utility model provides a sand quantity sensing device for a 3D printing sand spreading device, including a sand tank, and further including a suspension bracket and a contact type sensing probe, wherein,

[0007] The suspension bracket is fixed inside the sand tank, and the sand tank is used for storing sand;

[0008] The contact type sensing probe is detachably arranged on the suspension bracket vertically for sensing the change of the sand quantity in the sand tank.

[0009] On the basis of the above technical solution, preferably, the contact type sensing probe is an admittance type level gauge.

[0010] On the basis of the above technical solution, preferably, it further includes a locking member, wherein,

[0011] An installation hole is vertically and penetratingly arranged on the suspension bracket, and one end of the contact type sensing probe is vertically slidably arranged in the installation hole;

[0012] The locking member is disposed at the installation hole for fixing the relative positions of the contact type induction probe and the suspension bracket.

[0013] Based on the above technical solutions, preferably, the suspension bracket includes a fixing plate, a cross arm, a vertical arm, and a mounting plate, wherein,

[0014] One end of the cross arm is fixedly connected to the upper end of the vertical arm, and the other end is fixedly connected to the fixing plate, and the fixing plate is fixedly connected to the sand groove;

[0015] The mounting plate is parallel to the cross arm, one end of the mounting plate is fixedly connected to the lower end of the vertical arm, and the installation hole is provided at the other end.

[0016] Based on the above technical solutions, preferably, the locking member includes a nut, wherein,

[0017] The contact type induction probe is cylindrical, and an external thread is provided on the side of the contact type induction probe;

[0018] Two nuts are screwed on the contact type induction probe;

[0019] The mounting plate is clamped and fixed between the two nuts.

[0020] Based on the above technical solutions, preferably, the locking member includes a bolt, wherein,

[0021] One end of the mounting plate away from the vertical arm is bent 90 degrees upward, and the bolt is screwed on the bent portion of the mounting plate;

[0022] One end of the bolt abuts against the side of the contact type induction probe.

[0023] Based on the above technical solutions, preferably, at least one suspension bracket is provided in the sand groove, and one contact type induction probe is provided on each suspension bracket.

[0024] Based on the above technical solutions, preferably, the bottom of the sand groove is in the shape of an inverted isosceles trapezoid.

[0025] Based on the above technical solutions, preferably, a sand outlet is vertically and penetratingly provided at the bottom of the sand groove, and the contact type induction probe is directly above the sand outlet.

[0026] Based on the above technical solutions, preferably, a wire passing hole is horizontally and penetratingly provided on one side of the sand groove.

[0027] The sand amount induction device of the 3D printing sand spreading device of the present utility model has the following beneficial effects compared with the prior art:

[0028] (1) By arranging a contact type induction probe in the sand tank to sense the change of the sand quantity in the sand tank, it is convenient to detect the sand quantity in the sand spreading device. At the same time, compared with the metering instrument under the traditional weight induction method, the failure rate can be effectively reduced, the stability and reliability of the 3D sand mold printing equipment can be improved, and the production efficiency can be enhanced.

[0029] (2) By arranging the contact type induction probe to be detachably arranged on the hanging bracket in the vertical direction, it is convenient to replace the contact type induction probe, convenient for maintenance, and convenient to adjust the installation height of the contact type induction probe. Furthermore, it is convenient to select the highest efficiency sand sending time according to different printing materials and sand spreading speeds, thereby improving the printing efficiency.

[0030] (3) By arranging a locking piece, it is convenient for the disassembly and installation of the contact type induction probe. Description of the Drawings

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 It is a perspective view of the sand quantity induction device of a 3D printing sand spreading device of the present invention;

[0033] Figure 2 It is a top view of the sand quantity induction device of a 3D printing sand spreading device of the present invention;

[0034] Figure 3 It is a cross-sectional view taken along the A-A direction of the present invention;

[0035] Figure 4 It is a perspective view of the hanging bracket of the present invention;

[0036] Figure 5 It is a perspective view of the nut part of the present invention;

[0037] Figure 6 It is a side view of the bolt part of the present invention;

[0038] In the figure: 1, sand tank; 2, hanging bracket; 3, contact type induction probe; 4, locking piece; 21, fixing plate; 22, cross arm; 23, vertical arm; 24, mounting plate; 41, nut; 42, bolt; 101, sand outlet; 102, wire routing hole; 201, mounting hole. Detailed Embodiments

[0039] The technical solutions in the present utility model will be clearly and completely described below in conjunction with the specific embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0040] As Figure 1-6 shown, a sand quantity sensing device of a 3D printing sand spreading device of the present utility model includes a sand tank 1, a suspension bracket 2 and a contact type induction probe 3. Among them, the sand tank 1, the suspension bracket 2 and the contact type induction probe 3 jointly form a sand spreading device of a 3D sand mold printing device. A vibration motor is arranged on the side of the sand spreading device for vibrating out sand.

[0041] The sand tank 1 is used to be installed on a 3D sand mold printer. Its function is to store the sand material for printing and to spread the sand material on the printing table. As Figure 1 shown, its specific structure is: the sand tank 1 is a square tank, and its bottom is in the shape of an inverted isosceles trapezoid, which is convenient for the concentration of sand material downward; as Figure 3 shown, a sand outlet 101 is also vertically and throughly arranged at the bottom of the sand tank 1 for discharging sand material; as Figure 1 shown, a wire routing hole 102 is horizontally and throughly arranged on one side of the sand tank 1 for the cable routing of the contact type induction probe 3.

[0042] As Figure 3 shown, the suspension bracket 2 is fixed inside the sand tank 1, and the contact type induction probe 3 is detachably arranged on the suspension bracket 2 vertically for sensing the change of the sand quantity in the sand tank 1. Specifically, the contact type induction probe 3 is directly above the sand outlet 101. The printer sends the mixed sand material into the sand tank 1 through a transfer pipe and fills the sand tank 1. At the same time, the suspension bracket 2 and the contact type induction probe 3 are submerged by sand. After the sand sending is completed, the sand spreading device moves uniformly on the printing table. During the movement process, the sand spreading device continuously vibrates to evenly spread the sand on the printing worktable and repeats this process. During the process, the sand surface continuously drops with the sand spreading process. When the sand surface drops below the contact type induction probe 3, the contact type induction probe 3 transmits the signal of the sand quantity change to the control computer of the 3D sand mold printer. At this time, the computer will stop spreading sand and simultaneously perform the next sand sending operation, and continuously repeat this process until the printing is completed.

[0043] The contact induction probe 3 is an admittance type level gauge. An admittance type level gauge is a sensor used to measure the level of materials in a container. It determines the height of the materials based on the change in capacitance or admittance (the reciprocal of capacitance). In this device, the admittance type level gauge is used to monitor the change in the amount of sand in the sand tank 1. Compared with the metering instruments under the traditional weight induction method, it can effectively reduce the failure rate of the equipment, improve the stability and reliability of the 3D sand mold printing equipment, and enhance the production efficiency.

[0044] To facilitate the installation of the contact induction probe 3, the sand amount induction device further includes a locking member 4. Among them, an installation hole 201 is vertically penetrated through the hanging bracket 2. One end of the contact induction probe 3 is vertically slidably arranged in the installation hole 201; the locking member 4 is arranged at the installation hole 201 for fixing the relative positions of the contact induction probe 3 and the hanging bracket 2.

[0045] Specifically, the hanging bracket 2 includes a fixing plate 21, a cross arm 22, a vertical arm 23, and an installation plate 24. Among them, one end of the cross arm 22 is fixedly connected to the upper end of the vertical arm 23, and the other end is fixedly connected to the fixing plate 21. The fixing plate 21 is fixedly connected to the sand tank 1; the installation plate 24 is parallel to the cross arm 22. One end of the installation plate 24 is fixedly connected to the lower end of the vertical arm 23, and the installation hole 201 is arranged at the other end.

[0046] When installing the contact induction probe 3, insert the contact induction probe 3 into the installation hole 201 and make the contact induction probe 3 at a suitable height. Then, lock and fix the contact induction probe 3 and the hanging bracket 2 through the locking member 4 to complete the installation of the contact induction probe 3. When it is necessary to adjust the height of the contact induction probe 3, loosen the locking member 4, and then move the contact induction probe 3 to a suitable height and lock it.

[0047] In the above structure, the locking member 4 includes two embodiments. Figure 5 Figure 14 shows the first embodiment of the locking member 4. Among them, the locking member 4 includes a nut 41. The contact induction probe 3 is cylindrical, and an external thread is arranged on the side of the contact induction probe 3; two nuts 41 are screwed on the contact induction probe 3; the installation plate 24 is clamped and fixed between the two nuts 41.

[0048] During installation, first screw the first nut 41 on the contact induction probe 3. After adjusting the position of the nut 41, insert the contact induction probe 3 into the installation hole 201, and then screw the second nut 41 on the contact induction probe 3 and tighten it. After tightening, the installation plate 24 is clamped and fixed between the two nuts 41 to realize the locking and fixing of the contact induction probe 3 and the hanging bracket 2.

[0049] When it is necessary to increase the height of the contact induction probe 3, loosen the lower nut 41 and screw it downward, then move the contact induction probe 3 upward, and then tighten the upper nut 41. On the contrary, when it is necessary to decrease the height of the contact induction probe 3, loosen the upper nut 41 and screw it upward, then move the contact induction probe 3 downward, and then tighten the lower nut 41.

[0050] Figure 6 Fig. shows a second embodiment of the locking member 4, wherein the locking member 4 includes a bolt 42. One end of the mounting plate 24 away from the vertical arm 23 is bent upward by 90 degrees, and the bolt 42 is screwed onto the bent portion of the mounting plate 24; One end of the bolt 42 abuts against the side of the contact induction probe 3.

[0051] During installation, insert the contact induction probe 3 into the installation hole 201, and then tighten the bolt 42 so that one end of it abuts against the contact induction probe 3, realizing the locking and fixing of the contact induction probe 3 and the suspension bracket 2.

[0052] When it is necessary to adjust the height of the contact induction probe 3, loosen the bolt 42, move the contact induction probe 3 up and down to the appropriate height, and then tighten the bolt 42.

[0053] In addition, to improve the reliability of detection, a plurality of contact induction probes 3 are arranged in the sand tank 1. Specifically, at least one suspension bracket 2 is arranged in the sand tank 1, and one contact induction probe 3 is arranged on each suspension bracket 2. Figure 1 In [the specific situation], three contact induction probes 3 are provided.

[0054] The usage method of the sand amount induction device of the 3D printing sand spreading device of the present utility model is as follows:

[0055] The sand tank 1 is installed at the installation position of the spreader of the 3D sand mold printer. The mixed sand material is sent into the sand tank 1 through the transfer pipe and the sand tank 1 is filled. At the same time, the suspension bracket 2 and the contact induction probe 3 are submerged by the sand. After the sand sending is completed, the sand spreader passes uniformly on the printing table. During the passing process, the sand spreader vibrates continuously to spread the sand evenly on the printing workbench. During the process, the sand surface continuously drops with the sand spreading process. When the sand surface drops below the contact induction probe 3, the contact induction probe 3 transmits a signal to the control computer of the 3D sand mold printer. At this time, the computer will stop spreading the sand and simultaneously perform the next sand sending operation. This process is continuously repeated until the printing is completed.

[0056] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A sand quantity sensing device for a 3D printing sand spreading device, comprising a sand tank (1), characterized in that: It also includes a hanging bracket (2) and a contact induction probe (3), wherein, the hanging bracket (2) is fixed inside the sand tank (1), and the sand tank (1) is used for storing sand materials; the contact induction probe (3) is detachably arranged on the hanging bracket (2) vertically and is used for sensing the change of the sand quantity in the sand tank (1).

2. The sand amount sensing device of a 3D printing sand spreading device according to claim 1, characterized in that: The contact induction probe (3) is an admittance level gauge.

3. The sand amount sensing device of a 3D printing sand spreading device according to claim 1, characterized in that: It also includes a locking member (4), wherein, a mounting hole (201) is vertically and penetratingly arranged on the hanging bracket (2), and one end of the contact induction probe (3) is slidably arranged in the mounting hole (201) vertically; the locking member (4) is arranged at the mounting hole (201) and is used for fixing the relative positions of the contact induction probe (3) and the hanging bracket (2).

4. The sand quantity sensing device of a 3D printing sand spreading device according to claim 3, characterized in that: The hanging bracket (2) includes a fixing plate (21), a cross arm (22), a vertical arm (23) and a mounting plate (24), wherein, one end of the cross arm (22) is fixedly connected to the upper end of the vertical arm (23), and the other end is fixedly connected to the fixing plate (21), and the fixing plate (21) is fixedly connected to the sand tank (1); the mounting plate (24) is parallel to the cross arm (22), one end of the mounting plate (24) is fixedly connected to the lower end of the vertical arm (23), and the mounting hole (201) is arranged at the other end.

5. The sand quantity sensing device of a 3D printing sand spreading device according to claim 4, characterized in that: The locking member (4) includes a nut (41), wherein, the contact induction probe (3) is cylindrical, and an external thread is arranged on the side of the contact induction probe (3); two nuts (41) are screwed on the contact induction probe (3); the mounting plate (24) is clamped and fixed between the two nuts (41).

6. The sand quantity sensing device of a 3D printing sand spreading device according to claim 4, characterized in that: The locking member (4) includes a bolt (42), wherein, one end of the mounting plate (24) away from the vertical arm (23) is bent 90 degrees upward, and the bolt (42) is screwed on the bent part of the mounting plate (24); one end of the bolt (42) abuts against the side of the contact induction probe (3).

7. The sand quantity sensing device of a 3D printing sand spreading device according to claim 5 or 6, characterized in that: At least one hanging bracket (2) is arranged in the sand tank (1), and one contact induction probe (3) is arranged on each hanging bracket (2).

8. The sand quantity sensing device of a 3D printing sand spreading device according to claim 1, characterized in that: The bottom of the sand tank (1) is in an inverted isosceles trapezoid shape.

9. The sand amount sensing device of a 3D printing sand spreading device according to claim 1, characterized in that: A sand outlet (101) is vertically and penetratingly arranged at the bottom of the sand tank (1), and the contact induction probe (3) is directly above the sand outlet (101).

10. The sand quantity sensing device of a 3D printing sand spreading device according to claim 1, characterized in that: A wire passing hole (102) is horizontally and penetratingly arranged on one side of the sand tank (1).

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