A finished product storage and filling integrated machine for electrophoretic paint production

Abstract

The present invention discloses an all-in-one machine for storing and filling finished products for producing electrophoretic paint, which is applied to the technical field of electrophoretic paint production equipment. The present invention starts an electric telescopic rod to push a connecting block downward, and a second stirring rod can rotate between the connecting block and the first stirring rod, so that the first stirring rod and the second stirring rod are expanded. Then, the first rotating motor is turned on to drive the first stirring rod and the second stirring rod to rotate through the transmission of a transmission rod, so that the electrophoretic paint stored in the storage barrel can be stirred, thereby achieving the purpose of preventing the storage of the electrophoretic paint finished products from condensing. By rotating the filling head, the limiting slider is allowed to slide on the bottom of the filling barrel, and then the overlap between the first flow limiting hole and the second flow limiting hole is controlled by rotating at different angles, so that the hole through which the diluted electrophoretic paint can flow out becomes larger or smaller, thereby achieving the function of conveniently controlling the filling amount of the electrophoretic paint.

Description

Technical Field

[0001] The invention belongs to the field of electrophoretic paint production equipment, and in particular relates to a finished product storage and filling integrated machine for electrophoretic paint production. Background Art

[0002] Electrophoretic paint, also known as electrophoretic coating, is still used by many people instead of electrophoretic coating. As the defects of conventional spraying continue to emerge, electrophoresis has become more and more popular, and electrophoretic paint has also been continuously updated, from anode electrophoretic paint to cathode electrophoretic paint, from single-component electrophoretic paint to two-component electrophoretic paint. The development of electrophoretic paint has also promoted the development of electrophoretic coating, so that more products no longer use spraying technology but electrophoresis. The electrophoretic paint can be stirred, mixed and stored in a stirring storage device to achieve a rapid fusion effect, thereby completing the corresponding addition.

[0003] At present, the Chinese invention with the announcement number of CN111645899A discloses a filling device for the production of mirror back paint electrophoretic paint, including a base, a support plate symmetrically fixedly connected to the upper end of the base, a top plate fixedly connected to the upper ends of the two support plates, a connecting plate fixedly connected to the opposite side walls of the two support plates, a plurality of slides fixedly connected to the connecting plate, a discharge pipe fixedly connected to the lower end of the slide, a feed pipe fixedly connected to the side wall of the slide near the lower end, an external feed pipe fixedly connected to the other ends of the plurality of feed pipes, a one-way valve installed on the feed pipe, an electromagnetic valve installed on the discharge pipe, a piston slidably connected to the slide, a push rod fixedly connected to the upper end of the piston, and the upper ends of the plurality of push rods pass through the opening of the slide and extend upward. The present invention does not require the use of a flow valve, can avoid unnecessary troubles caused by a flow valve failure, and can accurately quantitatively fill.

[0004] Since electrophoretic paint is relatively viscous, the traditional solenoid valve filling method is prone to clogging the filling pipe. Long-term use may cause valve failure, resulting in changes in the filling volume and inaccurate filling volume. In addition, the viscous electrophoretic paint products are also prone to condensation during daily storage, which in turn affects subsequent filling. Summary of the invention

[0005] The object of the present invention is to provide an integrated storage and filling machine for electrophoretic paint production, which has the advantages of preventing condensation of the electrophoretic paint finished products during storage, facilitating the filling of the electrophoretic paint, and conveniently controlling the filling amount of the electrophoretic paint.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: a finished product storage and filling integrated machine for electrophoretic paint production, comprising a storage barrel, a stirring mechanism is arranged inside the storage barrel, a filling barrel is welded to the bottom of the storage barrel, an extrusion mechanism is arranged inside the filling barrel, and current limiting mechanisms used in conjunction with the extrusion mechanism are arranged on both sides of the bottom of the filling barrel.

[0007] By adopting the above technical solution, by turning on the electric telescopic rod to push the connecting block downward, the second stirring rod can rotate between the connecting block and the first stirring rod, so that the first stirring rod and the second stirring rod are expanded, and then the first rotating motor is turned on to drive the first stirring rod and the second stirring rod to rotate through the transmission of the transmission rod, and the electrophoretic paint stored in the storage barrel can be stirred, so as to achieve the purpose of preventing the storage of the finished electrophoretic paint from condensing, thereby facilitating the later filling of the electrophoretic paint. By using the diluent addition port to inject diluent into the interior of the storage barrel, and then turning on the stirring mechanism to stir the electrophoretic paint to dilute the electrophoretic paint, and finally turning on the second rotating motor to drive the threaded transmission rod to rotate, the extrusion plate can be limited by the limit block and the limit groove and move up and down on the surface of the threaded transmission rod, so as to squeeze out the diluted electrophoretic paint flowing into the filling barrel and flow out from the current limiting mechanism, so as to achieve the effect of facilitating the filling of the electrophoretic paint, thereby effectively preventing the electrophoretic paint from clogging the pipeline. The diluted electrophoretic paint is squeezed out through the extrusion mechanism, and then the filling head is rotated to slide on the bottom of the filling barrel under the limit of its limit slider, and then the overlap between the first flow limiting hole and the second flow limiting hole is controlled by rotating at different angles, so that the hole through which the diluted electrophoretic paint can flow out can be enlarged or reduced, thereby achieving the function of conveniently controlling the filling amount of the electrophoretic paint, and solving the problem that the traditional solenoid valve filling is prone to malfunction, causing the filling amount to change and resulting in inaccurate filling amount.

[0008] The present invention is further configured as follows: the stirring mechanism includes a first rotating motor bolted to the top of the inner cavity of the storage barrel, the first rotating motor is installed with a transmission rod through a coupling, both sides of the bottom of the transmission rod are rotatably connected with the first stirring rod, the bottom of the transmission rod is installed with an electric telescopic rod, the output end of the electric telescopic rod is installed with a connecting block, and the end of the first stirring rod away from each other is rotatably connected with a second stirring rod rotatably connected to the connecting block.

[0009] By adopting the above technical solution, the electrophoretic paint can be stirred to avoid condensation during storage.

[0010] The present invention is further configured as follows: the extrusion mechanism includes a threaded transmission rod rotatably connected to the filling barrel, a second rotating motor fixedly sleeved with the threaded transmission rod is provided at the bottom of the filling barrel, an extrusion disk is threadedly connected to the surface of the threaded transmission rod, a limiting block is welded inside the filling barrel, a limiting groove is provided on the surface of the extrusion disk which is slidably connected to the limiting block, a rubber ring is bonded to the surface of the extrusion disk, and a sealing sleeve fixedly sleeved with the filling barrel is provided on the surface of the threaded transmission rod.

[0011] The adoption of the technical solution makes it easier to fill the electrophoretic paint.

[0012] The present invention is further configured as follows: the flow limiting mechanism is a filling head rotatably connected to the filling barrel, a limiting slider slidably connected to the filling barrel is welded to the top of the inner cavity of the filling head, a first flow limiting hole is opened at the bottom of the inner cavity of the filling head, and second flow limiting holes connected to the first flow limiting hole are opened on both sides of the bottom of the filling barrel.

[0013] The above technical solution is adopted to facilitate the control of the filling amount of the electrophoretic paint.

[0014] The present invention is further configured as follows: a mounting plate is bolted to the bottom of the storage bucket, and supporting legs are bolted to the four corners of the bottom of the mounting plate.

[0015] By adopting the above technical solution, the storage barrel can be supported and fixed.

[0016] The present invention is further configured as follows: a supporting base plate is welded to the bottom of the supporting leg, and an anti-slip pad is bonded to the bottom of the supporting base plate.

[0017] By adopting the above technical solution, the friction between the supporting bottom plate and the ground can be increased, thereby improving the stability of the storage barrel.

[0018] The present invention is further configured as follows: a first protective cylinder used in conjunction with a first rotating motor is bolted to the top of the storage barrel, and a heat dissipation filter is bolted to the top of the first protective cylinder.

[0019] By adopting the above technical solution, the first rotating motor can be protected and the heat dissipation of the first rotating motor can be facilitated.

[0020] The present invention is further configured as follows: a diluent inlet and an electrophoretic paint inlet are respectively connected on both sides of the storage barrel surface; and a sealing cover is threadedly connected to the diluent inlet and the electrophoretic paint inlet at one end away from the storage barrel.

[0021] The above technical solution makes it easy to add diluent or finished electrophoretic paint, and can be sealed when not in use to reduce dust entry.

[0022] The present invention is further configured as follows: a through groove is opened on one side of the surface of the storage barrel, a transparent plate is bonded inside the through groove, and a scale is engraved on the surface of the transparent plate.

[0023] The above technical solution makes it easy to observe the amount of electrophoretic paint inside the storage barrel and the dilution degree of the electrophoretic paint.

[0024] The present invention is further configured as follows: a second protective cylinder bolted to the second rotating motor is provided at the bottom of the filling barrel, a heat dissipation hole is opened on the surface of the second protective cylinder, and a filter is bolted inside the heat dissipation hole.

[0025] By adopting the above technical solution, the second rotating motor can be protected and the heat dissipation of the second rotating motor can be facilitated.

[0026] In summary, the present invention has the following beneficial effects:

[0027] 1. By turning on the electric telescopic rod to push the connecting block downward, the second stirring rod can rotate between the connecting block and the first stirring rod, so that the first stirring rod and the second stirring rod are expanded, and then the first rotating motor is turned on to drive the first stirring rod and the second stirring rod to rotate through the transmission of the transmission rod, so that the electrophoretic paint stored in the storage barrel can be stirred, thereby achieving the purpose of preventing the storage of the electrophoretic paint finished product from condensing, thereby facilitating the later filling of the electrophoretic paint;

[0028] 2. By using the diluent adding port to inject diluent into the storage barrel, then starting the stirring mechanism to stir the electrophoretic paint to dilute the electrophoretic paint, and finally starting the second rotating motor to drive the threaded transmission rod to rotate, the extrusion plate can be limited by the limit block and the limit groove and move up and down on the surface of the threaded transmission rod, so as to squeeze out the diluted electrophoretic paint flowing into the filling barrel and flow out from the current limiting mechanism, so as to achieve the effect of facilitating the filling of the electrophoretic paint, thereby effectively preventing the electrophoretic paint from clogging the pipeline due to viscosity;

[0029] 3. The diluted electrophoretic paint is squeezed out through the extrusion mechanism, and then the filling head is rotated to slide on the bottom of the filling barrel under the limit of the limit slider, and then the overlap between the first flow limiting hole and the second flow limiting hole is controlled by rotating at different angles, so that the hole through which the diluted electrophoretic paint can flow out can be enlarged or reduced, thereby achieving the function of conveniently controlling the filling amount of the electrophoretic paint, and solving the problem that the traditional solenoid valve filling is prone to malfunction, causing the filling amount to change and resulting in inaccurate filling amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0031] Figure 2 is a three-dimensional structural cross-sectional view of the present invention;

[0032] Figure 3 It is a front cross-sectional view of a local structure of the present invention;

[0033] Figure 4 The present invention Figure 2 A in the enlarged view;

[0034] Figure 5 The present invention Figure 2 The enlarged view of point B in the figure;

[0035] Figure 6 The present invention Figure 3 The enlarged view of point C in the figure;

[0036] Figure 7 It is a top sectional view of a local structure of the present invention.

[0037] 1. Storage barrel; 201. First rotating motor; 202. Drive rod; 203. First stirring rod; 204. Second stirring rod; 205. Connecting block; 206. Electric telescopic rod; 3. Filling barrel; 401. Second rotating motor; 402. Threaded drive rod; 403. Extrusion plate; 404. Limit block; 405. Limit groove; 406. Rubber ring; 501. Filling head; 502. Limit slider; 503. First flow limiting hole; 504. Second flow limiting hole; 6. Mounting plate; 7. Support leg; 8. Support bottom plate; 9. First protective cylinder; 10. Heat dissipation filter; 11. Dilution inlet; 12. Electrophoretic paint inlet; 13. Sealing cover; 14. Transparent plate; 15. Scale; 16. Second protective cylinder; 17. Heat dissipation hole; 18. Sealing sleeve. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0039] Embodiment 1:

[0040] refer to Figure 1 , Figure 2 , Figure 4 A finished product storage and filling integrated machine for electrophoretic paint production includes a storage barrel 1. A stirring mechanism is arranged inside the storage barrel 1. By turning on the electric telescopic rod 205 to push the connecting block 206 downward, the second stirring rod 204 can rotate between the connecting block 206 and the first stirring rod 203, so that the first stirring rod 203 and the second stirring rod 204 are expanded. Then, the first rotating motor 201 is turned on to drive the first stirring rod 203 and the second stirring rod 204 to rotate through the transmission of the transmission rod 202. The electrophoretic paint stored in the storage barrel 1 can be stirred, thereby achieving the purpose of preventing the storage of the electrophoretic paint finished product from condensing, thereby facilitating the later filling of the electrophoretic paint.

[0041] refer to Figure 1 , Figure 2 , Figure 4 The stirring mechanism includes a first rotating motor 201 bolted to the top of the inner cavity of the storage barrel 1, and the first rotating motor 201 is installed with a transmission rod 202 through a coupling. Both sides of the bottom of the transmission rod 202 are rotatably connected with first stirring rods 203, and an electric telescopic rod 205 is installed at the bottom of the transmission rod 202. A connecting block 206 is installed at the output end of the electric telescopic rod 205. One end of the first stirring rod 203 that is away from each other is rotatably connected with a second stirring rod 204 that is rotatably connected to the connecting block 206, so that the electrophoretic paint can be stirred to avoid condensation during storage.

[0042] refer to Figure 1 , Figure 2 , Figure 3 A mounting plate 6 is bolted to the bottom of the storage barrel 1 , and support legs 7 are bolted to the four corners of the bottom of the mounting plate 6 , which can support and fix the storage barrel 1 .

[0043] refer to Figure 1 , Figure 2 , Figure 3 A supporting base plate 8 is welded to the bottom of the supporting leg 7 , and an anti-skid pad is bonded to the bottom of the supporting base plate 8 , which can increase the friction between the supporting base plate 8 and the ground and improve the stability of the storage barrel 1 .

[0044] refer to Figure 1 , Figure 2 A first protective tube 9 for use with the first rotating motor 201 is bolted to the top of the storage barrel 1. A heat dissipation filter 10 is bolted to the top of the first protective tube 9, which can protect the first rotating motor 201 and facilitate heat dissipation of the first rotating motor 201.

[0045] Brief description of the usage process: when it is necessary to prevent the storage of the finished electrophoretic paint from condensing, first turn on the electric telescopic rod 205 to push the connecting block 206 downward, and the second stirring rod 204 can be rotated between the connecting block 206 and the first stirring rod 203 by the push of the electric telescopic rod 205, and the first stirring rod 203 is rotated on both sides of the transmission rod 202 to expand the first stirring rod 203 and the second stirring rod 204. Finally, turn on the first rotating motor 201 to drive the first stirring rod 203 and the second stirring rod 204 to rotate through the transmission of the transmission rod 202, so that the electrophoretic paint stored in the storage bucket 1 can be stirred.

[0046] Embodiment 2:

[0047] refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7A finished product storage and filling integrated machine for electrophoretic paint production includes a storage barrel 1, a filling barrel 3 is welded at the bottom of the storage barrel 1, an extrusion mechanism is arranged inside the filling barrel 3, and both sides of the bottom of the filling barrel 3 are provided with a current limiting mechanism used in conjunction with the extrusion mechanism. The diluent is injected into the storage barrel 1 through a diluent inlet 11, and then the stirring mechanism is turned on to stir the electrophoretic paint to dilute the electrophoretic paint. Finally, the second rotating motor 401 is turned on to drive the threaded transmission rod 402 to rotate, so that the extrusion disk 403 can move up and down on the surface of the threaded transmission rod 402 through the limit block 404 and the limit groove 405, thereby squeezing out the diluted electrophoretic paint flowing into the filling barrel 3 and flowing out from the current limiting mechanism, thereby achieving the effect of facilitating the filling of the electrophoretic paint, thereby effectively preventing the electrophoretic paint from clogging the pipeline due to viscosity. The diluted electrophoretic paint is squeezed out through the extrusion mechanism, and then the filling head 501 is rotated to slide on the bottom of the filling barrel 3 under the limit of its limit slider 502, and then the overlap between the first flow limiting hole 503 and the second flow limiting hole 504 is controlled by rotating at different angles, so that the hole through which the diluted electrophoretic paint can flow out can be enlarged or reduced, thereby achieving the function of conveniently controlling the filling amount of the electrophoretic paint, and solving the problem that the traditional solenoid valve filling is prone to malfunction, causing the filling amount to change and resulting in inaccurate filling amount.

[0048] refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 The extrusion mechanism includes a threaded transmission rod 402 rotatably connected to the filling barrel 3, a second rotating motor 401 fixedly sleeved with the threaded transmission rod 402 is arranged at the bottom of the filling barrel 3, an extrusion disk 403 is threadedly connected to the surface of the threaded transmission rod 402, a limiting block 404 is welded inside the filling barrel 3, a limiting groove 405 slidably connected to the limiting block 404 is opened on the surface of the extrusion disk 403, a rubber ring 406 is bonded to the surface of the extrusion disk 403, and a sealing sleeve 18 fixedly connected to the filling barrel 3 is fixedly sleeved on the surface of the threaded transmission rod 402, which is convenient for filling the electrophoretic paint.

[0049] refer to Figure 3 , Figure 6 , Figure 7 The flow limiting mechanism is a filling head 501 rotatably connected to the filling barrel 3, a limiting slider 502 slidably connected to the filling barrel 3 is welded on the top of the inner cavity of the filling head 501, a first flow limiting hole 503 is opened at the bottom of the inner cavity of the filling head 501, and second flow limiting holes 504 connected to the first flow limiting hole 503 are opened on both sides of the bottom of the filling barrel 3, which is convenient for controlling the filling amount of the electrophoretic paint.

[0050] refer to Figure 1 , Figure 2The two sides of the surface of the storage barrel 1 are respectively connected with a diluent addition port 11 and an electrophoretic paint addition port 12. The diluent addition port 11 and the electrophoretic paint addition port 12 are threadedly connected with a sealing cover 13 at one end away from the storage barrel 1, which is convenient for adding diluent or finished electrophoretic paint. It can also be sealed when idle to reduce dust entry.

[0051] refer to Figure 1 , Figure 2 A through groove is provided on one side of the surface of the storage barrel 1, a transparent plate 14 is bonded inside the through groove, and a scale 15 is engraved on the surface of the transparent plate 14, so as to facilitate observation of the amount of electrophoretic paint inside the storage barrel 1 and the dilution degree of the electrophoretic paint.

[0052] refer to Figure 1 , Figure 2 , Figure 3 A second protective tube 16 bolted to the second rotating motor 401 is provided at the bottom of the filling barrel 3. A heat dissipation hole 17 is opened on the surface of the second protective tube 16. A filter is bolted inside the heat dissipation hole 17, which can protect the second rotating motor 401 and facilitate heat dissipation of the second rotating motor 401.

[0053] Brief description of the use process: when it is necessary to facilitate the filling of the electrophoretic paint, firstly, the diluent is injected into the storage barrel 1 through the diluent adding port 11, and then the stirring mechanism is turned on to stir the electrophoretic paint to dilute the electrophoretic paint, and then the second rotating motor 401 is turned on to drive the threaded transmission rod 402 to rotate, and the threaded engagement between the threaded transmission rod 402 and the extrusion plate 403 allows the extrusion plate 403 to move up and down on the surface of the threaded transmission rod 402 through the limit block 404 and the limit groove 405, and then the extrusion plate 403 moves to the threaded transmission rod 402 so that the electrophoretic paint can be discharged from the rubber The paint flows through the gap between the rubber ring 406 and the storage barrel 1 to the interior of the filling barrel 3, and finally the second rotating motor 401 drives the extrusion plate 403 and the rubber ring 406 to move downward to squeeze the electrophoretic paint out from the current limiting mechanism. When it is necessary to conveniently control the filling amount of the electrophoretic paint, the diluted electrophoretic paint is first squeezed out through the extrusion mechanism, and then the filling head 501 is rotated to slide on the bottom of the filling barrel 3 under the limit of the limit slider 502, and then the overlap between the first flow limiting hole 503 and the second flow limiting hole 504 is controlled by rotating at different angles, so that the hole through which the diluted electrophoretic paint can flow out can be enlarged or reduced.

[0054] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A finished product storage and filling machine for electrophoretic paint production, comprising a storage barrel (1), characterized in that: The storage barrel (1) is provided with a stirring mechanism inside, a filling barrel (3) is welded to the bottom of the storage barrel (1), an extrusion mechanism is provided inside the filling barrel (3), and both sides of the bottom of the filling barrel (3) are provided with flow limiting mechanisms used in conjunction with the extrusion mechanism; the extrusion mechanism comprises a threaded transmission rod (402) rotatably connected to the filling barrel (3), a second rotating motor (401) fixedly sleeved with the threaded transmission rod (402) is provided at the bottom of the filling barrel (3), an extrusion disk (403) is threadedly connected to the surface of the threaded transmission rod (402), a limiting block (404) is welded inside the filling barrel (3), and the surface of the extrusion disk (403) is A limiting groove (405) is provided which is slidably connected to the limiting block (404); a rubber ring (406) is bonded to the surface of the extrusion disk (403); a sealing sleeve (18) which is fixedly connected to the filling barrel (3) is fixedly sleeved on the surface of the threaded transmission rod (402); a filling head (501) which is rotatably connected to the filling barrel (3) is provided in the flow limiting mechanism; a limiting slider (502) which is slidably connected to the filling barrel (3) is welded to the top of the inner cavity of the filling head (501); a first flow limiting hole (503) is provided at the bottom of the inner cavity of the filling head (501); and second flow limiting holes (504) which are in communication with the first flow limiting hole (503) are provided on both sides of the bottom of the filling barrel (3).

2. The finished product storage and filling integrated machine for electrophoretic paint production according to claim 1, characterized in that: The stirring mechanism comprises a first rotating motor (201) bolted to the top of the inner cavity of the storage barrel (1); the first rotating motor (201) is mounted with a transmission rod (202) via a coupling; both sides of the bottom of the transmission rod (202) are rotatably connected to first stirring rods (203); an electric telescopic rod (205) is mounted at the bottom of the transmission rod (202); a connecting block (206) is mounted at the output end of the electric telescopic rod (205); and one end of the first stirring rod (203) that is away from each other is rotatably connected to a second stirring rod (204) rotatably connected to the connecting block (206).

3. The finished product storage and filling integrated machine for electrophoretic paint production according to claim 1, characterized in that: The bottom of the storage barrel (1) is bolted with a mounting plate (6), and the four corners of the bottom of the mounting plate (6) are bolted with supporting legs (7).

4. The finished product storage and filling integrated machine for electrophoretic paint production according to claim 3 is characterized in that: A support base plate (8) is welded to the bottom of the support leg (7), and an anti-slip pad is bonded to the bottom of the support base plate (8).

5. The finished product storage and filling integrated machine for electrophoretic paint production according to claim 2, characterized in that: A first protective cylinder (9) used in conjunction with a first rotating motor (201) is bolted to the top of the storage barrel (1), and a heat dissipation filter (10) is bolted to the top of the first protective cylinder (9).

6. The finished product storage and filling integrated machine for electrophoretic paint production according to claim 1, characterized in that: The two sides of the surface of the storage barrel (1) are respectively connected with a diluent inlet (11) and an electrophoretic paint inlet (12), and the ends of the diluent inlet (11) and the electrophoretic paint inlet (12) away from the storage barrel (1) are threadedly connected with a sealing cover (13).

7. The finished product storage and filling integrated machine for electrophoretic paint production according to claim 1, characterized in that: A through groove is provided on one side of the surface of the storage barrel (1), a transparent plate (14) is bonded to the interior of the through groove, and a scale (15) is engraved on the surface of the transparent plate (14).

8. The finished product storage and filling integrated machine for electrophoretic paint production according to claim 1, characterized in that: A second protective tube (16) bolted to the second rotating motor (401) is provided at the bottom of the filling barrel (3), a heat dissipation hole (17) is provided on the surface of the second protective tube (16), and a filter is bolted inside the heat dissipation hole (17).

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