Core-making equipment and usage method for a casting sand core

Abstract

This application relates to the field of casting technology, and particularly to a core-making device and a usage method for casting sand cores, including an outer frame and an inner frame. A printing base plate is arranged on the inner frame, and a plurality of chill blocks are slidably arranged on the printing base plate. A sliding assembly for driving the movement of the chill blocks is arranged on the printing base plate. A surrounding plate tube is vertically slidably arranged on the printing base plate, and the circumferential outer side wall of the printing base plate is in close contact with the circumferential inner side wall of the surrounding plate tube. A lifting member for driving the lifting of the surrounding plate tube is arranged on the outer frame. A printing mechanism is arranged on the outer frame, and the printing mechanism is used to print the chill blocks on the sand core. The printing mechanism includes a sand covering assembly and a glue coating assembly arranged on the outer frame. The glue coating assembly is used to spray a casting binder on the casting sand, and the sand covering assembly is used to cover the casting sand on the sprayed casting binder. This application has the effects of improving the fixing strength between the chill blocks and the sand core and reducing the difficulty of installing the chill blocks.

Description

Technical Field

[0001] This application relates to the field of casting technology, and particularly to a core-making device for casting sand cores and a usage method thereof. Background Art

[0002] Casting is a metal hot working process. By pouring molten metal into a specific mold and waiting for it to cool and solidify, parts or blanks with the required shape and size are formed. Chill blocks play a crucial role in the casting process. Its main functions include reducing the size of risers, improving the feeding channels, controlling the solidification sequence of castings, eliminating local thermal stresses, preventing cracks, accelerating the solidification speed of castings, refining the grain structure, and improving the mechanical properties of castings.

[0003] With the popularization and application of 3D printing technology, the method of using 3D printed sand cores for casting production has gradually been applied in the industry. 3D printed sand cores are created by curing each layer covered with sand grains using a liquid connector to create a three-dimensional solid prototype. In the design of conventional 3D printed sand core casting processes, due to reasons such as the weight of chill blocks and the time required for the solidification of 3D printing materials, chill blocks cannot be directly placed during the 3D printing of sand cores. Therefore, chill block grooves for installing chill blocks need to be set on the sand cores. After the sand cores are printed and cured, the chill blocks are bonded into the chill block grooves.

[0004] However, since the volume changes when the liquid connector cures the sand grain layers, there will be a design error between the reserved chill block grooves and the dimensions of standard chill blocks. At the same time, during the long-term use of chill blocks, the dimensions of the chill blocks themselves will also change. Eventually, this will lead to the problem that the chill blocks cannot be installed in the chill block grooves or the gap between the chill block grooves and the chill blocks is too large, which will further cause casting defects in the castings, and there are deficiencies. Summary of the Invention

[0005] In order to improve the problem that there is a situation where the chill blocks cannot be installed or the installation gap is large between the chill blocks and the chill block grooves, this application provides a core-making device for casting sand cores and a usage method thereof.

[0006] In the first aspect, a core-making device for casting sand cores provided by this application adopts the following technical solution:

[0007] A core-making device for a casting sand core, comprising an outer frame and an inner frame. A printing base plate is arranged on the inner frame. A plurality of chill blocks are slidably arranged on the printing base plate. A sliding component for driving the movement of the chill blocks is arranged on the printing base plate. A baffle tube is vertically slidably arranged on the printing base plate. The circumferential outer side wall of the printing base plate is in close contact with the circumferential inner side wall of the baffle tube. A lifting component for driving the lifting of the baffle tube is arranged on the outer frame. A printing mechanism is arranged on the outer frame. The printing mechanism is used for printing the chill blocks on the sand core. The printing mechanism comprises a sand covering component and a glue covering component arranged on the outer frame. The glue covering component is used for spraying a casting binder on the casting sand. The sand covering component is used for covering casting sand on the sprayed casting binder.

[0008] By adopting the above technical solution, the worker sprays the casting binder on the printing base plate according to the cross-section of the sand core through the glue covering component, and then the sand covering component lays a layer of casting sand on the entire printing base plate. Then wait for the casting binder to cure. Then the glue covering component sprays the casting binder on the printing base plate according to the cross-section of the sand core again, and the sand covering component lays a layer of casting sand on the printing base plate. Repeat the above process until the cured sand core reaches the designed position of the chill block. Then the sliding component drives the chill block to move to the designed position of the sand core and remains stationary. At this time, there is a height difference between the chill block and the sand core. Then the glue covering component continues to spray the casting binder on the casting sand, and the sand covering component continuously lays casting sand until the height difference is filled. Then the glue covering component sprays the casting binder on the casting sand and the chill block, and the sand covering component lays casting sand until the entire sand core is completed. During this process, the chill block is fixed on the sand core by the cured casting sand, and there is no need for the worker to install and fix the chill block. It is fixed completely according to the size of the chill block, which is beneficial to reducing the possibility of the chill block accidentally falling off the sand core.

[0009] Optionally, the sliding component comprises a plurality of slide rails arranged on the inner frame. The slide rails correspond to the chill blocks one by one. A slide seat slides on the slide rail. A plurality of translation cylinders electrically connected to the control system are arranged on the inner frame. The translation cylinders correspond to the slide rails one by one. The slide seat is arranged on the piston rod of the translation cylinder. A lifting cylinder arranged vertically and electrically connected to the control system is arranged on the slide seat. An avoidance groove for the piston rod of the lifting cylinder to pass through and slide is formed on the printing base plate. The chill block is detachably arranged on the piston rod of the lifting cylinder. A leak-proof part for closing the avoidance groove is arranged on the printing base plate.

[0010] By adopting the above technical solution, after the solidified sand core reaches the designed position of the chill, the worker starts the translation cylinder and the lifting cylinder to work through the control system. The piston rod of the translation cylinder pushes the sliding seat to drive the lifting cylinder to slide, and the piston rod of the lifting cylinder drives the chill to move to the designed position of the sand core. During the movement of the lifting cylinder, the anti-leakage member prevents the casting sand from flowing out of the avoidance groove. After the sand core is solidified, the piston rod of the lifting cylinder is separated from the chill. At this time, the chill is prefabricated on the sand core, reducing the dimensional error problem in installation.

[0011] Optionally, the lifting member includes a lifting cylinder disposed on the outer frame. A connecting plate is disposed on the piston rod of the lifting cylinder. The connecting plate is disposed on the surrounding plate tube. The lifting cylinder is electrically connected to the control system.

[0012] By adopting the above technical solution, after the sand covering assembly lays a layer of casting sand, the control system starts the lifting cylinder. The piston rod of the lifting cylinder pushes the surrounding plate tube to rise a certain distance through the connecting plate, thereby reducing the possibility of the casting sand flowing out of the surrounding plate tube, and at the same time making the casting sand around the sand core play a supporting role on the sand core.

[0013] Optionally, the anti-leakage member includes an anti-leakage belt slidably sleeved on the piston rod of the lifting cylinder. The anti-leakage belt is arranged along the length direction of the avoidance groove. Rotating shafts are wound around both ends of the anti-leakage belt. A tape take-up box is arranged on the printing bottom plate. Pressing strips are arranged on both sides of the anti-leakage belt in the length direction between the two tape take-up boxes. The anti-leakage belt is slidably matched with the pressing strips. The rotating shafts are rotatably arranged in the tape take-up boxes, and torsion springs are arranged between the rotating shafts and the tape take-up boxes.

[0014] By adopting the above technical solution, when the piston rod of the lifting cylinder slides along the length direction of the avoidance groove, the piston rod of the lifting cylinder drives the rotating shaft at one end of the anti-leakage belt to unwind the anti-leakage belt, and the anti-leakage belt at the other end is wound up by the anti-leakage belt under the action of the torsion spring, thereby blocking the avoidance groove during the movement of the piston rod of the lifting cylinder. During this process, the pressing strips are beneficial to reducing the possibility of the anti-leakage belt being concave and opening the avoidance groove to cause the leakage of the casting sand.

[0015] Optionally, a first electric sliding table and a second electric sliding table are symmetrically arranged on the outer frame. A third electric sliding table and a fourth electric sliding table are slidably mounted between the first electric sliding table and the second electric sliding table. One end of the third electric sliding table is arranged on the slider of the first electric sliding table, and the other end is slidably matched with the second electric sliding table. One end of the fourth electric sliding table is arranged on the slider of the second electric sliding table, and the other end is slidably matched with the first electric sliding table. The first electric sliding table, the second electric sliding table, the third electric sliding table and the fourth electric sliding table are all electrically connected to the control system.

[0016] By adopting the above technical solution, the first electric slide table drives the third electric slide table to slide along the length direction of the first electric slide table through its slider, and the second electric slide table drives the fourth electric slide table to slide along the length direction of the second electric slide table through its slider.

[0017] Optionally, the rubber coating assembly includes a rubber coating cylinder electrically connected to the control system. The rubber coating cylinder is vertically arranged on the slider of the third electric slide table. A glue spraying head is arranged on the piston rod of the rubber coating cylinder, and a glue injection pipe joint for supplying glue is communicated with the glue spraying head.

[0018] By adopting the above technical solution, the first electric slide table drives the third electric slide table to slide along the length direction of the first electric slide table through its slider, and the third electric slide table drives the rubber coating cylinder to slide along the length direction of the third electric slide table through its slider. At the same time, the rubber coating cylinder drives the glue spraying head to move vertically, so that the glue spraying head can move to any position in the three-dimensional space, thereby enabling the glue spraying head to print a complex core shape.

[0019] Optionally, the sand covering assembly includes a sand covering cylinder electrically connected to the control system. The sand covering cylinder is arranged on the slider of the fourth electric slide table. A sand covering box is arranged on the piston rod of the sand covering cylinder. A sand covering notch is formed on the sand covering box. A sand inlet pipe for injecting sand is communicated with the sand covering box. A sealing sand cylinder electrically connected to the control system is arranged on the sand covering box. A plug board is arranged on the piston rod of the sealing sand cylinder. The plug board is slidably matched with the sand covering box, and the plug board is used for blocking the sand covering notch of the sand covering box.

[0020] By adopting the above technical solution, after the lifting cylinder drives the gusset pipe to rise, the control system starts the sand covering cylinder, so that the piston rod of the sand covering cylinder drives the sand covering box to rise by the same height. Then, the slider of the second electric slide table drives the fourth electric slide table to slide along the length direction of the second electric slide table. At the same time, the sealing sand cylinder drives the plug board to open the sand covering notch, and the casting sand in the sand covering box flows out from the sand covering notch, so as to cover the casting sand on the casting binder sprayed by the glue spraying head, thereby realizing the printing process of the core.

[0021] Optionally, a curing lamp is arranged on one side of the sand covering box facing away from its advancing direction, and the curing lamp is used for heating the casting sand flowing out of the sand covering box.

[0022] By adopting the above technical solution, after the casting binder is covered with casting sand, the curing lamp on the sand covering box heats and dries the covered casting sand, so that the casting binder can be quickly dried and cured, which is beneficial to reducing the time required for the curing of the casting binder.

[0023] Optionally, a brush is arranged on one side of the curing lamp facing away from the sand covering box, and the brush is used for leveling the casting sand in the gusset pipe.

[0024] By adopting the above technical solution, the brush can sweep the upper surface of the casting sand in the spacer tube flat, which is beneficial to improving the printing effect of the sand core. At the same time, the brush can sweep the casting sand covering the chill, thereby reducing the accumulation of casting sand on the chill and being beneficial to improving the fixing effect of the sand core on the chill.

[0025] Second, the present application provides a method for using a core-making device for a casting sand core, adopting the following technical solution:

[0026] A method for using a core-making device for a casting sand core includes the following steps:

[0027] S1. The glue-coating component sprays a casting binder on the printing bottom plate according to the cross-section of the sand core, and the sand-coating component lays a layer of casting sand on the printing bottom plate, and waits for the casting binder to cure;

[0028] S2. The lifting member pushes the spacer tube upward, the height of the spacer tube is higher than the upper surface of the casting sand, then the glue-coating component sprays the casting binder again according to the cross-section of the sand core, and then the sand-coating component lays a layer of casting sand again, and waits for the casting binder to cure again;

[0029] S3. Until the sand core reaches the designed position of the chill, the sliding component drives the chill to move to the designed position of the sand core. At this time, there is a height difference between the chill and the sand core;

[0030] S4. The glue-coating component continues to spray the casting binder on the casting sand, and the sand-coating component lays the casting sand on the sprayed casting binder until the height difference between the chill and the sand core is filled;

[0031] S5. Then the glue-coating component sprays the casting binder on the casting sand and the chill, and the sand-coating component lays the casting sand again until the entire sand core is completed.

[0032] By adopting the above technical solution, the chill can be directly fixed on the sand core, which is beneficial to reducing the difficulty for workers to install the chill, and at the same time is beneficial to reducing the requirement for the dimensional accuracy of the chill groove when reserving the chill groove on the sand core traditionally.

[0033] In summary, the present application includes at least one of the following beneficial technical effects:

[0034] 1. Workers spray casting binder on the printing base plate according to the cross-section of the core through the rubber coating component, and then the sand covering component lays a layer of casting sand on the entire printing base plate, and then waits for the casting binder to solidify. The above process is repeated until the solidified core reaches the designed position of the chill, and then the sliding component drives the chill to move to the designed position of the core and remains stationary. Then the rubber coating component continues to spray casting binder on the casting sand, and the sand covering component continuously lays casting sand until the entire core is completed. During this process, the chill is fixed on the core by the solidified casting sand, and there is no need for workers to install and fix the chill, and it is fixed completely according to the size of the chill;

[0035] 2. After the solidified core reaches the designed position of the chill, the worker starts the translation cylinder and the lifting cylinder to work through the control system. The piston rod of the translation cylinder pushes the sliding seat to drive the lifting cylinder to slide, and the piston rod of the lifting cylinder drives the chill to move to the designed position of the core. During the movement of the lifting cylinder, the leak-proof part prevents the casting sand from flowing out of the avoidance groove. When the core is solidified, the piston rod of the lifting cylinder is separated from the chill. At this time, the chill is prefabricated on the core, reducing the dimensional error problem in installation;

[0036] 3. The brush can sweep the upper surface of the casting sand in the baffle tube flat, which is beneficial to improving the printing effect of the core. At the same time, the brush can sweep the casting sand covering the chill, thereby reducing the occurrence of casting sand accumulation on the chill and being beneficial to improving the fixing effect of the core on the chill. Description of the Drawings

[0037] Figure 1 is a schematic structural diagram of an embodiment of the present application.

[0038] Figure 2 is a cross-sectional view of the positional relationship among the sand covering cylinder, the rubber coating cylinder and the built-in frame in an embodiment of the present application.

[0039] Figure 3 is a schematic structural diagram of the positional relationship among the chill, the lifting cylinder and the translation cylinder in an embodiment of the present application.

[0040] Figure 4 is Figure 2 an enlarged view of part A in

[0041] Figure 5 is Figure 3 an enlarged view of part B in

[0042] Description of reference numerals: 0, core sand; 1, outer frame; 2, built-in frame; 3, printing base plate; 4, chill; 5, sliding assembly; 51, slide rail; 52, slide block; 53, translation cylinder; 54, lifting cylinder; 55, avoidance groove; 56, leak prevention member; 561, leak prevention belt; 562, rotating shaft; 563, tape take-up box; 564, pressure strip; 565, torsion spring; 6, enclosing plate pipe; 7, lifting member; 71, lifting cylinder; 72, connecting plate; 8, printing mechanism; 81, sand covering assembly; 811, sand covering cylinder; 812, sand covering box; 813, sand covering notch; 814, sand inlet pipe; 815, sand sealing cylinder; 816, plug board; 82, glue covering assembly; 821, glue covering cylinder; 822, glue spraying head; 823, glue injection pipe joint; 9, first electric sliding table; 10, second electric sliding table; 11, third electric sliding table; 12, fourth electric sliding table; 13, curing lamp; 14, brush; 15, collection box; 16, sand discharge pipe; 17, solenoid valve. Detailed implementation manners

[0043] The following further elaborates on this application with reference to the Figures 1 - 5 drawings.

[0044] Embodiment 1

[0045] The embodiment of this application discloses a core-making device for casting core sand.

[0046] Referring to Figure 1 , a core-making device for casting core sand includes an outer frame 1 and a built-in frame 2. The built-in frame 2 is located inside the outer frame 1. A printing base plate 3 is welded on the built-in frame 2, and an enclosing plate pipe 6 is arranged to slide vertically on the printing base plate 3.

[0047] Referring to Figure 1 , Figure 2 and Figure 3 , the circumferential outer side wall of the printing base plate 3 is in close contact with the circumferential inner side wall of the enclosing plate pipe 6. A collection box 15 is arranged below the enclosing plate pipe 6. The top and bottom of the printing base plate 3 are connected by a vertical sand discharge pipe 16. The bottom of the sand discharge pipe 16 extends to the top of the collection box 15. A solenoid valve 17 electrically connected to the control system is arranged on the sand discharge pipe 16.

[0048] Referring to Figure 1 , Figure 2 and Figure 3 , a lifting member 7 for driving the enclosing plate pipe 6 to lift is arranged on the outer frame 1. The lifting member 7 includes a lifting cylinder 71 bolted to the outer frame 1 and placed vertically. The lifting cylinder 71 is electrically connected to the control system. The end of the piston rod of the lifting cylinder 71 is welded with a connecting plate 72, and the connecting plate 72 is welded to the outer side wall of the enclosing plate pipe 6.

[0049] Referring to Figure 1 , Figure 2 andFigure 3 On the printing base plate 3, a plurality of chill blocks 4 are slidably arranged. A sliding component 5 for driving the movement of the chill blocks 4 is arranged on the printing base plate 3. A printing mechanism 8 for printing the chill blocks 4 on the sand core 0 is arranged on the outer frame 1. The printing mechanism 8 includes a sand covering component 81 and a glue spraying component 82 arranged on the outer frame 1. The glue spraying component 82 is used for spraying a casting binder on the casting sand, and the sand covering component 81 is used for covering the casting sand on the sprayed casting binder.

[0050] The glue spraying component 82 sprays the casting binder on the printing base plate 3 according to the cross-section of the sand core 0. Then, the sand covering component 81 lays a layer of casting sand on the entire printing base plate 3. Then, wait for the casting binder to cure. Finally, the control system starts the lifting cylinder 71, and the piston rod of the lifting cylinder 71 pushes the shroud tube 6 to rise a certain distance through the connecting plate 72, so that the casting sand around the cured sand core 0 plays a supporting role on the sand core 0.

[0051] Refer to Figure 1 and Figure 2 As shown in

[0052] Refer to Figure 1 and Figure 2 One end of the third electric slide 11 is bolted to the slider of the first electric slide 9, and the other end is slidably engaged with the second electric slide 10. One end of the fourth electric slide 12 is bolted to the slider of the second electric slide 10, and the other end is slidably engaged with the first electric slide 9. The first electric slide 9, the second electric slide 10, the third electric slide 11, and the fourth electric slide 12 are all electrically connected to the control system.

[0053] Refer to Figure 1 and Figure 2 As shown in

[0054] Refer to Figure 1 and Figure 2, the sand covering component 81 includes a sand covering cylinder 811 electrically connected to the control system. The sand covering cylinder 811 is vertical and bolted to the slider of the fourth electric slide table 12. A sand covering box 812 is welded to the piston rod of the sand covering cylinder 811. A sand covering notch 813 is opened at the bottom of the sand covering box 812. A sand inlet pipe 814 for injecting sand is communicated with the sand covering box 812. A sealing sand cylinder 815 electrically connected to the control system is bolted to the sand covering box 812.

[0055] Referring to Figure 1 , Figure 2 and Figure 4 , a plug board 816 is welded to the piston rod of the sealing sand cylinder 815. The plug board 816 is slidably matched with the sand covering box 812. The plug board 816 is used to block the sand covering notch 813 of the sand covering box 812. A curing lamp 13 is bolted to one side of the sand covering box 812 facing away from its advancing direction. The curing lamp 13 is used to heat the casting sand flowing out of the sand covering box 812. A brush 14 is welded to one side of the curing lamp 13 facing away from the sand covering box 812. The brush 14 is used to level the casting sand in the formwork tube 6.

[0056] The control system starts the first electric slide table 9 and the third electric slide table 11. The slider of the first electric slide table 9 drives the third electric slide table 11 to slide along the length direction of the first electric slide table 9. The slider of the third electric slide table 11 drives the rubber coating cylinder 821 to slide along the length direction of the third electric slide table 11. At the same time, the rubber coating cylinder 821 drives the glue spraying head 822 to move vertically through its piston rod, so as to realize the printing and spraying operation in three-dimensional space.

[0057] When the glue spraying head 822 sprays a cross-section of a sand core 0, the control system drives the third electric slide table 11 to move to one side of the fourth electric slide table 12 through the first electric slide table 9. Then the control system starts the second electric slide table 10 and the fourth electric slide table 12. The slider of the second electric slide table 10 drives the third electric slide table 11 to slide along the length direction of the second electric slide table 10. The slider of the fourth electric slide table 12 drives the sand covering cylinder 811 to slide along the length direction of the fourth electric slide table 12.

[0058] Then the control system starts the sealing sand cylinder 815. The piston rod of the sealing sand cylinder 815 drives the plug board 816 to move. The plug board 816 opens the sand covering notch 813. The casting sand in the sand covering box 812 flows out from the sand covering notch 813 until a layer of casting sand completely covers the top of the formwork tube 6. During this process, the curing lamp 13 heats the casting sand to accelerate the curing of the casting binder. At the same time, the brush 14 levels the casting sand on the top of the formwork tube 6.

[0059] Referring to Figure 2 , Figure 3 and Figure 5, the sliding assembly 5 includes a plurality of slide rails 51 welded to the built-in frame 2. The slide rails 51 correspond to the chill blocks 4 one by one. A slide block 52 is slidably mounted on each slide rail 51. A plurality of translation cylinders 53 electrically connected to the control system are bolted to the built-in frame 2. The translation cylinders 53 correspond to the slide rails 51 one by one. The slide block 52 is bolted to the piston rod of the translation cylinder 53.

[0060] Referring to Figure 2 , Figure 3 and Figure 5 , a lifting cylinder 54 is bolted vertically on the slide block 52. The lifting cylinder 54 is electrically connected to the control system. A plurality of avoidance grooves 55 for the piston rod of the lifting cylinder 54 to pass through and slide are formed on the printing bottom plate 3. The avoidance grooves 55 correspond to the lifting cylinders 54 one by one. The chill block 4 is inserted into the end of the piston rod of the lifting cylinder 54. A leak-proof member 56 for closing the avoidance groove 55 is arranged on the printing bottom plate 3.

[0061] Referring to Figure 2 , Figure 3 and Figure 5 , the leak-proof member 56 includes a leak-proof belt 561 slidably sleeved on the piston rod of the lifting cylinder 54. The leak-proof belt 561 can be made of rubber material. The leak-proof belt 561 is arranged along the length direction of the avoidance groove 55. Rotating shafts 562 are wound around both ends of the leak-proof belt 561.

[0062] Referring to Figure 2 , Figure 3 and Figure 5 , tape collecting boxes 563 are welded on the printing bottom plate 3 at both ends of the leak-proof belt 561. Pressing strips 564 are bolted on both sides of the leak-proof belt 561 in the length direction between the two tape collecting boxes 563. The leak-proof belt 561 is slidably matched with the pressing strips 564. The rotating shafts 562 are rotatably arranged in the tape collecting boxes 563. A torsion spring 565 is arranged between the rotating shafts 562 and the tape collecting boxes 563.

[0063] When the printing and curing position of the sand core 0 reaches the designed position of the chill block 4, the control system starts the translation cylinder 53 and the lifting cylinder 54. The translation cylinder 53 drives the lifting cylinder 54 to move through the slide block 52. The piston rod of the lifting cylinder 54 drives the chill block 4 to approach the sand core 0. At this time, there is a height difference between the chill block 4 and the sand core 0. Then, during the spraying process of the glue spraying head 822, it will be driven by the glue coating cylinder 821 to move vertically.

[0064] To avoid hitting the chill block 4 until the height difference between the chill block 4 and the sand core 0 is filled. Finally, the glue spraying head 822 will spray the casting binder on both the chill block 4 and the cured sand core 0 at the same time. The sand covering box 812 lays the casting sand until the entire sand core 0 is completed. When the sand core 0 is cured, the translation cylinder 53 drives the lifting cylinder 54 to move away from the chill block 4. During the process of filling the height difference between the chill block 4 and the sand core 0, the brush 14 will sweep down the casting sand laid on the chill block 4.

[0065] During the process that the piston rod of the lifting cylinder 54 moves and slides along the length direction of the avoidance groove 55, the piston rod of the lifting cylinder 54 drives the rotating shaft 562 at one end of the leak-proof belt 561 to unreel the leak-proof belt 561, and the leak-proof belt 561 at the other end winds up the leak-proof belt 561 under the action of the torsion spring 565, so as to block the avoidance groove 55 during the movement of the piston rod of the lifting cylinder 54.

[0066] The implementation principle of Embodiment 1 is as follows: The rubber coating assembly 82 sprays the casting binder on the printing base plate 3 according to the cross-section of the sand core 0, then the sand covering assembly 81 lays a layer of casting sand on the entire printing base plate 3, then waits for the casting binder to cure, and finally the control system starts the lifting cylinder 71. The piston rod of the lifting cylinder 71 pushes the enclosure pipe 6 to rise a certain distance through the connecting plate 72, so that the casting sand around the cured sand core 0 plays a supporting role for the sand core 0.

[0067] The control system starts the first electric sliding table 9 and the third electric sliding table 11. The slider of the first electric sliding table 9 drives the third electric sliding table 11 to slide along the length direction of the first electric sliding table 9, and the slider of the third electric sliding table 11 drives the rubber coating cylinder 821 to slide along the length direction of the third electric sliding table 11. At the same time, the rubber coating cylinder 821 drives the glue spraying head 822 to move vertically through its piston rod, so as to realize the printing and spraying operation in three-dimensional space.

[0068] When the glue spraying head 822 sprays the cross-section of a sand core 0, the control system drives the third electric sliding table 11 to move to one side of the fourth electric sliding table 12 through the first electric sliding table 9, and then the control system starts the second electric sliding table 10 and the fourth electric sliding table 12. The slider of the second electric sliding table 10 drives the third electric sliding table 11 to slide along the length direction of the second electric sliding table 10, and the slider of the fourth electric sliding table 12 drives the sand covering cylinder 811 to slide along the length direction of the fourth electric sliding table 12.

[0069] Then the control system starts the sand sealing cylinder 815. The piston rod of the sand sealing cylinder 815 drives the inserting plate 816 to move. The inserting plate 816 opens the sand covering notch 813, and the casting sand in the sand covering box 812 flows out from the sand covering notch 813 until a layer of casting sand is completely laid on the top of the enclosure pipe 6. During this process, the curing lamp 13 heats the casting sand to accelerate the curing of the casting binder, and at the same time, the brush 14 sweeps the casting sand on the top of the enclosure pipe 6 flat.

[0070] After the printing and curing position of the core 0 reaches the designed position of the chill 4, the control system activates the translation cylinder 53 and the lifting cylinder 54. The translation cylinder 53 drives the lifting cylinder 54 to move through the sliding seat 52, and the piston rod of the lifting cylinder 54 drives the chill 4 to approach the core 0. At this time, there is a height difference between the chill 4 and the core 0. Then, during the spraying process, the glue spraying head 822 will be driven to move vertically by the glue coating cylinder 821.

[0071] Avoid hitting the chill 4 until the height difference between the chill 4 and the core 0 is filled. Finally, the glue spraying head 822 will spray the casting binder on both the chill 4 and the cured core 0 simultaneously. The sand covering box 812 lays the casting sand until the entire core 0 is completed. After the core 0 is cured, the translation cylinder 53 drives the lifting cylinder 54 to move away from the chill 4. During the process of filling the height difference between the chill 4 and the core 0, the brush 14 will sweep down the casting sand laid on the chill 4.

[0072] During the process of the piston rod of the lifting cylinder 54 sliding along the length direction of the avoidance groove 55, the piston rod of the lifting cylinder 54 drives the rotating shaft 562 at one end of the leak-proof belt 561 to unwind the leak-proof belt 561, and the leak-proof belt 561 at the other end winds up the leak-proof belt 561 under the action of the torsion spring 565, so as to block the avoidance groove 55 during the movement of the piston rod of the lifting cylinder 54.

[0073] Embodiment 2

[0074] The present application discloses a method for using a core-making device for casting cores in Embodiment 2, including the following steps:

[0075] S1. The control system activates the first electric slide 9, the third electric slide 11 and the glue coating cylinder 821. The glue coating cylinder 821 drives the glue spraying head 822 through its piston rod to spray the casting binder on the printing bottom plate 3 according to the cross-section of the core 0. Then, the control system drives the third electric slide 11 to move towards one end of the first electric slide 9 through the first electric slide 9.

[0076] S2. The control system activates the second electric slide 10 and the fourth electric slide 12. The sand covering cylinder 811 drives the sand covering box 812 to slide along the length direction of the second electric slide 10, so as to lay the casting sand on the casting binder. At the same time, the curing lamp 13 heats the casting sand flowing out of the sand covering box 812 to quickly cure the casting binder.

[0077] S3. The control system activates the lifting cylinder 71, and the piston rod of the lifting cylinder 71 pushes the fence tube 6 to rise a certain distance through the connecting plate 72.

[0078] S4. Repeat the above process until the core 0 reaches the designed position of the chill 4.

[0079] S5. The control system activates the translation cylinder 53 and the lifting cylinder 54, and the chill 4 moves to the designed position of the core 0. At this time, there is a height difference between the chill 4 and the core 0. Then, during the spraying process, the glue spraying head 822 cooperates with the sand covering box 812 to fill in the height difference.

[0080] S6. The glue spraying head 822 sprays the casting binder on the casting sand and the chill 4, and the sand covering box 812 lays the casting sand on the sprayed casting binder until the entire core 0 is completed.

[0081] S7. When the core 0 is completely cured, the translation cylinder 53 drives the lifting cylinder 54 to move away from the chill 4. The control system activates the solenoid valve 17, and the sand discharging pipe 16 discharges the casting sand in the baffle pipe 6 into the collection box 15, and then the worker can take out the core 0.

[0082] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A core-making device for casting sand cores, characterized in that: It includes an outer frame (1) and an inner frame (2). A printing base plate (3) is arranged on the inner frame (2). A plurality of chill blocks (4) are slidably arranged on the printing base plate (3). A sliding component (5) for driving the movement of the chill blocks (4) is arranged on the printing base plate (3). A gusset pipe (6) is vertically slidably arranged on the printing base plate (3). The circumferential outer wall of the printing base plate (3) is in close contact with the circumferential inner wall of the gusset pipe (6). A lifting component (7) for driving the lifting of the gusset pipe (6) is arranged on the outer frame (1). A printing mechanism (8) is arranged on the outer frame (1). The printing mechanism (8) is used to print the chill blocks (4) on the sand core (0). The printing mechanism (8) includes a sand covering component (81) and a glue coating component (82) arranged on the outer frame (1). The glue coating component (82) is used to spray a casting binder on the casting sand. The sand covering component (81) is used to cover casting sand on the sprayed casting binder until the cured sand core (0) reaches the designed position of the chill block (4). Then, the sliding component (5) drives the chill block (4) to move to the designed position of the sand core (0) and remains stationary. Then, the glue coating component (82) continues to spray the casting binder on the casting sand, and the sand covering component (81) continuously lays casting sand until the entire sand core (0) is completed. During this process, the chill block (4) is fixed on the sand core (0) by the cured casting sand.

2. The core-making equipment for a casting sand core according to claim 1, characterized in that: The sliding component (5) includes a plurality of slide rails (51) arranged on the inner frame (2). The slide rails (51) correspond to the chill blocks (4) one by one. A slide seat (52) slides on the slide rail (51). A plurality of translation cylinders (53) electrically connected to the control system are arranged on the inner frame (2). The translation cylinders (53) correspond to the slide rails (51) one by one. The slide seat (52) is arranged on the piston rod of the translation cylinder (53). A lifting cylinder (54) which is vertical and electrically connected to the control system is arranged on the slide seat (52). An avoidance groove (55) for the piston rod of the lifting cylinder (54) to pass through and slide is formed on the printing base plate (3). The chill block (4) is detachably arranged on the piston rod of the lifting cylinder (54). A leak prevention component (56) for closing the avoidance groove (55) is arranged on the printing base plate (3).

3. The core-making equipment for a casting sand core according to claim 2, characterized in that: The lifting component (7) includes a lifting cylinder (71) arranged on the outer frame (1). A connecting plate (72) is arranged on the piston rod of the lifting cylinder (71). The connecting plate (72) is arranged on the gusset pipe (6). The lifting cylinder (71) is electrically connected to the control system.

4. The core-making equipment for a casting sand core according to claim 2, characterized in that: The leak prevention member (56) includes a leak prevention belt (561) slidably sleeved on the piston rod of the lifting cylinder (54). The leak prevention belt (561) is arranged along the length direction of the avoidance groove (55). Both ends of the leak prevention belt (561) are wound with a rotating shaft (562). A tape collecting box (563) is arranged on the printing base plate (3). Pressing strips (564) are arranged on both sides of the leak prevention belt (561) in the length direction between the two tape collecting boxes (563). The leak prevention belt (561) is slidably matched with the pressing strips (564). The rotating shaft (562) is rotatably arranged in the tape collecting box (563). A torsion spring (565) is arranged between the rotating shaft (562) and the tape collecting box (563).

5. The core-making equipment for a casting sand core according to claim 3, characterized in that: A first electric sliding table (9) and a second electric sliding table (10) are symmetrically arranged on the outer frame (1). A third electric sliding table (11) and a fourth electric sliding table (12) are slidably mounted between the first electric sliding table (9) and the second electric sliding table (10). One end of the third electric sliding table (11) is arranged on the slider of the first electric sliding table (9), and the other end is slidably matched with the second electric sliding table (10). One end of the fourth electric sliding table (12) is arranged on the slider of the second electric sliding table (10), and the other end is slidably matched with the first electric sliding table (9). The first electric sliding table (9), the second electric sliding table (10), the third electric sliding table (11) and the fourth electric sliding table (12) are all electrically connected to a control system.

6. The core-making equipment for a casting sand core according to claim 5, characterized in that: The rubber coating assembly (82) includes a rubber coating cylinder (821) electrically connected to the control system. The rubber coating cylinder (821) is vertically arranged on the slider of the third electric sliding table (11). A glue spraying head (822) is arranged on the piston rod of the rubber coating cylinder (821). A glue injection pipe joint (823) for supplying glue is communicated with the glue spraying head (822).

7. The core-making equipment for a casting sand core according to claim 6, characterized in that: The sand coating assembly (81) includes a sand coating cylinder (811) electrically connected to the control system. The sand coating cylinder (811) is arranged on the slider of the fourth electric sliding table (12). A sand coating box (812) is arranged on the piston rod of the sand coating cylinder (811). A sand coating notch (813) is formed on the sand coating box (812). A sand inlet pipe (814) for injecting sand is communicated with the sand coating box (812). A sand sealing cylinder (815) electrically connected to the control system is arranged on the sand coating box (812). A plug board (816) is arranged on the piston rod of the sand sealing cylinder (815). The plug board (816) is slidably matched with the sand coating box (812). The plug board (816) is used for blocking the sand coating notch (813) of the sand coating box (812).

8. The core-making equipment for a casting sand core according to claim 7, characterized in that: A curing lamp (13) is arranged on one side of the sand coating box (812) facing away from its advancing direction. The curing lamp (13) is used for heating the casting sand flowing out of the sand coating box (812).

9. The core-making equipment for a casting sand core according to claim 8, characterized in that: A brush (14) is provided on one side of the curing lamp (13) facing away from the sand-covered box (812), and the brush (14) is used to level the casting sand in the spacer tube (6).

10. A method for using a core-making device for a casting sand core according to any one of claims 1-9, characterized in that: The method includes the following steps: S1. The rubber coating assembly (82) sprays a casting binder on the printing base plate (3) according to the cross-section of the sand core (0), and the sand covering assembly (81) lays a layer of casting sand on the printing base plate (3), and waits for the casting binder to cure. S2. The lifting member (7) pushes the spacer tube (6) to rise, and the height of the spacer tube (6) is higher than the upper surface of the casting sand. Then the rubber coating assembly (82) sprays the casting binder again according to the cross-section of the sand core (0), and then the sand covering assembly (81) lays a layer of casting sand again, and waits for the casting binder to cure again. S3. Until the sand core (0) reaches the designed position of the chill (4), the sliding assembly (5) drives the chill (4) to move to the designed position of the sand core (0). At this time, there is a height difference between the chill (4) and the sand core (0). S4. The rubber coating assembly (82) continues to spray the casting binder on the casting sand, and the sand covering assembly (81) lays the casting sand on the sprayed casting binder until the height difference between the chill (4) and the sand core (0) is filled. S5. Then the rubber coating assembly (82) sprays the casting binder on the casting sand and the chill (4), and the sand covering assembly (81) lays the casting sand again until the entire sand core (0) is completed.

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