CN212218943U

CN212218943U - Efficient polyester resin mixing arrangement

Info

Publication number: CN212218943U
Application number: CN201921947619.8U
Authority: CN
Inventors: 张澜
Original assignee: SUZHOU SIRGEL SPECIALTY RESINS CO Ltd
Current assignee: SUZHOU SIRGEL SPECIALTY RESINS CO Ltd
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2020-12-25
Anticipated expiration: 2029-11-12

Abstract

The utility model relates to the technical field of accessory devices for processing and producing special materials, in particular to an efficient polyester resin mixing device; the working modes are various, the inside of the working cavity can be effectively cleaned after the device works for a long time, partial waste materials can be prevented from being retained in the working cavity after the device works for a long time, and convenience is brought to a user; the electric heating device comprises a case, a driving motor, a speed reducer, an installation frame and an electric heating rod, wherein a working cavity is arranged in the case, feed inlets are formed in the top end and the side plates of the case, the speed reducer is positioned at the output end of the driving motor, the electric heating rod is installed on the installation frame and is in contact with the bottom end of the case; still include two sets of mounts, two sets of servo motor, two sets of connecting bands, two sets of adjustable shelves, link, activity motor, adjustable shelf and scraper blade, two sets of servo motor's output all is provided with the movable roller, and the top of two sets of adjustable shelves all is provided with the second and drives the frame, is provided with the connecting rod on the adjustable shelf, and the scraper blade bottom is provided with the multiunit brush hair.

Description

Efficient polyester resin mixing arrangement

Technical Field

The utility model relates to a technical field of special material processing production auxiliary device especially relates to an efficient polyester resin mixing arrangement.

Background

As is well known, a polyester resin mixing device is a device for mixing and stirring a plurality of raw materials used for producing resin special materials so as to meet the requirement of production and processing on the proportion concentration of the special materials, and is widely used in the field of special material processing; the existing polyester resin mixing device comprises a case, a driving motor, a speed reducer, a mounting frame and an electric heating rod, wherein a working cavity is arranged in the case, a feeding hole is formed in the top end and a side plate of the case, the feeding hole and the discharging hole are communicated with the working cavity, a first baffle and a second baffle driving motor are arranged on the side walls of the feeding hole and the discharging hole and are mounted at the bottom end of the case, the speed reducer is fixedly mounted at the bottom end of the case, the speed reducer is located at the output end of the driving motor, a transmission shaft is arranged at the output end of the speed reducer, a plurality of groups of stirring blades are arranged at the outer side output end of the transmission shaft, the mounting frame is fixedly mounted at the bottom end of the; when the existing polyester resin mixing device is used, a user opens the first baffle and puts various raw materials required by work into the work cavity, and the drive motor is started to drive the multiple groups of stirring blades to move through the transmission shaft after the speed reduction action of the speed reducer, so that the raw materials in the work cavity are mixed; however, the existing polyester resin mixing device is found in use that the working mode of the device is single, the inside of the working cavity is inconvenient to clean after the device works for a long time, and the waste materials in the working cavity are easy to be retained after the device works for a long time, so that inconvenience is brought to a user, and the use reliability of the device is low.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a mode is comparatively various, can effectually clean the work cavity inside after the long-time work of device, can prevent that long-time work intracavity from being detained partial waste material, offers convenience for the user to improve its efficient polyester resin mixing arrangement who uses the reliability.

The utility model discloses an efficient polyester resin mixing arrangement, the load simulator comprises a case, driving motor, a speed reducer, mounting bracket and electrical heating rod, be provided with the working chamber in the machine case, be provided with the feed inlet on the top of machine case and the curb plate, and feed inlet and discharge gate all communicate with the working chamber, all be provided with first baffle and second baffle driving motor on the lateral wall of feed inlet and discharge gate and install the bottom at the machine case, the fixed ann of reduction gear changes in the bottom of machine case, the speed reducer is located driving motor's output, the output of speed reducer is provided with the transmission shaft, and be provided with multiunit stirring leaf on the external survey output of transmission shaft, mounting bracket fixed mounting is in the machine case bottom, electrical heating rod installs on the mounting bracket and electrical heating rod contacts with; the automatic cleaning device is characterized by further comprising two groups of fixed frames, two groups of servo motors, two groups of connecting belts, two groups of movable frames, connecting frames, movable motors, movable frames and scraping plates, wherein the two groups of fixed frames are respectively and fixedly arranged on the front side and the rear side of the left side wall of the working cavity, the right ends of the two groups of fixed frames are respectively provided with a fixed groove, the two groups of servo motors are respectively and fixedly arranged in the two groups of fixed grooves, the output ends of the two groups of servo motors are respectively provided with movable rollers, the two groups of movable rollers are respectively and fixedly provided with two groups of first driving frames, the top ends of the two groups of movable frames are respectively provided with a second driving frame, the top ends and the bottom ends of the two groups of connecting belts are respectively and fixedly arranged on the two groups of first driving frames and the two groups of second driving frames, the front end and the rear end, the movable frame is provided with a movable groove, the movable plate is clamped in the movable groove, the movable frame is provided with a connecting rod, the connecting rod is connected with the scraper, the bottom end of the scraper is provided with a plurality of groups of bristles, and the left end of the movable frame is hinged to the side wall of the working cavity.

The utility model discloses an efficient polyester resin mixing arrangement still includes two sets of arm-tie and limiting plate, the top of first baffle and the right-hand member of second baffle all are provided with the drawing groove, and two sets of arm-tie difference fixed mounting are at two sets of drawing inslots, and the right-hand member of machine case is provided with the spiral shaft, be provided with the hole soon on the limiting plate, the limiting plate is installed on the spiral shaft and the contact of spiral shaft lateral wall and the downthehole lateral wall that revolves.

The utility model discloses an efficient polyester resin mixing arrangement still includes two sets of last bracing pieces and two sets of bottom suspension daggers, and two sets of bottom suspension dagger hinges respectively in the front side and the rear side of work intracavity, and two sets of last bracing pieces hinge respectively in the front side and the rear side of second baffle bottom, and inside two sets of bottom suspension dagger tops were inserted respectively to two sets of bottom suspension dagger bottoms.

The utility model discloses an efficient polyester resin mixing arrangement still includes transparent plate and two sets of baffling boards, two sets of baffling boards are fixed mounting respectively on the left side wall and the right side wall of working chamber, are provided with the observation hole on the lateral wall of machine case, observe the hole and communicate with each other with the working chamber, transparent plate fixed mounting is on the lateral wall of observing the hole.

The utility model discloses an efficient polyester resin mixing arrangement still detains including cleaning plate and activity, and the activity is detained the fixed installation and is provided with the spout on the preceding lateral wall of working chamber at the left end of cleaning plate, the activity is detained the card and is adorned in the spout, the left end of cleaning plate is provided with the foam-rubber cushion to foam-rubber cushion and transparent plate contact are provided with the rocker on the transparent plate, the front end of rocker stretches out to the outside of working chamber.

The utility model discloses an efficient polyester resin mixing arrangement still includes four group's landing legs and push rods, and four group's landing legs are fixed mounting respectively and are all provided with the gyro wheel in the left front side, right front side, left rear side and the right rear side of quick-witted bottom half, four groups landing leg bottom all is provided with two sets of supports, and the front side and the rear side of quick-witted case right-hand member are fixed respectively and are provided with two sets of supports, the front end and the rear end of push rod respectively with two sets of leg joint.

The utility model discloses an efficient polyester resin mixing arrangement still includes two sets of fixed anchors, and the front side and the rear side of machine bottom of the case portion are provided with two sets of installation poles respectively, and two sets of fixed anchors are installed respectively in two sets of installation pole bottoms, and the bottom of two sets of fixed anchors all is provided with the slipmat, and is two sets of the bottom of slipmat all is provided with multiunit antiskid line.

The utility model discloses an efficient polyester resin mixing arrangement still includes spacing, and spacing fixed mounting is in the spread groove, be provided with spacing hole on the spacing, the connecting rod passes spacing hole.

Compared with the prior art, the beneficial effects of the utility model are that: servo motor passes through the movable roll and drives first drive frame and remove thereupon, the rotatory accessible connecting band of first drive frame drives the frame to stimulate the second, thereby adjust spacing position, make spacing bottom and working chamber bottom wall contact, movable motor work accessible fly leaf drives the adjustable shelf and removes, drive the connecting rod and drive the scraper blade simultaneously and carry out periodic removal, thereby utilize the brush hair to clean the working chamber bottom, the working mode is comparatively various, can effectually clean the working chamber inside after the long-time work of device, can prevent to detain partial waste material in the long-time working chamber, bring the facility for the user, thereby improve its reliability in utilization.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view showing an internal structure of a connecting frame;

FIG. 3 is a schematic view of the structure of the cleaning plate and the transparent plate;

FIG. 4 is a schematic view of the internal structure of the fixing frame;

FIG. 5 is a schematic structural view of an upper support pole and a lower support pole;

in the drawings, the reference numbers: 1. a chassis; 2. a drive motor; 3. a speed reducer; 4. a mounting frame; 5. An electrical heating rod; 6. a first baffle plate; 7. stirring blades; 8. a fixed mount; 9. a servo motor; 10. A connecting belt; 11. a movable frame; 12. a connecting frame; 13. a movable motor; 14. a movable roller; 15. An adjusting bracket; 16. a second driving frame; 17. a movable plate; 18. brushing; 19. a squeegee; 20. Pulling a plate; 21. a limiting plate; 22. an upper support rod; 23. a lower support bar; 24. a transparent plate; 25. A baffle plate; 26. cleaning the plate; 27. a sponge cushion; 28. a rocker; 29. a support leg; 30. a push rod; 31. a roller; 32. fixing an anchor; 33. a non-slip mat; 34. a limiting frame.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in figures 1 to 5, the high-efficiency polyester resin mixing device of the utility model comprises a machine case 1, a driving motor 2, a speed reducer 3, a mounting rack 4 and an electric heating rod 5, wherein a working chamber is arranged in the machine case 1, feed inlets are arranged on the top end and the side plate of the machine case 1, the feed inlet and the discharge outlet are communicated with the working cavity, the side walls of the feed inlet and the discharge outlet are respectively provided with a first baffle 6 and a second baffle driving motor 2 which are arranged at the bottom end of the case 1, the reducer is fixedly arranged at the bottom end of the case 1, the reducer 3 is positioned at the output end of the driving motor 2, the output end of the reducer 3 is provided with a transmission shaft, a plurality of groups of stirring blades 7 are arranged at the outer output end of the transmission shaft, the mounting frame 4 is fixedly mounted at the bottom end of the case 1, the electric heating rod 5 is mounted on the mounting frame 4, and the electric heating rod 5 is in contact with the bottom end of the case 1; the automatic cleaning device comprises two groups of fixed frames 8, two groups of servo motors 9, two groups of connecting belts 10, two groups of movable frames 11, a connecting frame 12, a movable motor 13, an adjusting frame 15 and a scraper 19, wherein the two groups of fixed frames 8 are respectively and fixedly arranged at the front side and the rear side of the left side wall of the working cavity, the right ends of the two groups of fixed frames 8 are respectively provided with a fixed groove, the two groups of servo motors 9 are respectively and fixedly arranged in the two groups of fixed grooves, the output ends of the two groups of servo motors 9 are respectively provided with movable rollers 14, the two groups of movable rollers 14 are respectively and fixedly provided with two groups of first driving frames, the top ends of the two groups of movable frames 11 are respectively provided with a second driving frame 16, the top ends and the bottom ends of the two groups of connecting belts 10 are respectively fixed on the two groups of first driving frames and the two groups of second driving frames 16, the front end, the output end of the movable motor 13 is provided with a movable plate 17, the adjusting frame 15 is provided with a movable groove, the movable plate 17 is clamped in the movable groove, the adjusting frame 15 is provided with a connecting rod, the connecting rod is connected with a scraper 19, the bottom end of the scraper 19 is provided with a plurality of groups of bristles 18, and the left end of the movable frame 11 is hinged on the side wall of the working cavity; servo motor passes through the movable roll and drives first drive frame and remove thereupon, the rotatory accessible connecting band of first drive frame drives the frame to stimulate the second, thereby adjust spacing position, make spacing bottom and working chamber bottom wall contact, movable motor work accessible fly leaf drives the adjustable shelf and removes, drive the connecting rod and drive the scraper blade simultaneously and carry out periodic removal, thereby utilize the brush hair to clean the working chamber bottom, the working mode is comparatively various, can effectually clean the working chamber inside after the long-time work of device, can prevent to detain partial waste material in the long-time working chamber, bring the facility for the user, thereby improve its reliability in utilization.

The utility model discloses an efficient polyester resin mixing arrangement still includes two sets of arm-tie 20 and limiting plate 21, and the top of first baffle 6 and the right-hand member of second baffle all are provided with the kerve, and two sets of arm-tie 20 are fixed mounting respectively in two sets of kerves, and the right-hand member of machine case 1 is provided with the spiral shaft, is provided with the spiral hole on the limiting plate 21, and limiting plate 21 installs on the spiral shaft and the spiral shaft lateral wall contacts with the spiral hole inside wall; the user removes the arm-tie and can drive first baffle and second baffle and remove to make things convenient for the user to open or close first baffle and second baffle.

The utility model discloses an efficient polyester resin mixing arrangement still includes two sets of upper support rods 22 and two sets of lower support rods 23, and two sets of lower support rods 23 articulate respectively in the front side and the rear side in the working chamber, and two sets of upper support rods 22 articulate respectively in the front side and the rear side of second baffle bottom end, and two sets of upper support rods 22 bottom are inserted respectively to inside two sets of lower support rods 23 top; go up bracing piece and lower support bar and can support the second baffle to the stability of second baffle when improving the user and opening the second baffle.

The utility model discloses an efficient polyester resin mixing device, further comprising a transparent plate 24 and two groups of baffle plates 25, wherein the two groups of baffle plates 25 are respectively and fixedly installed on the left side wall and the right side wall of the working chamber, the side wall of the case 1 is provided with an observation hole, the observation hole is communicated with the working chamber, and the transparent plate 24 is fixedly installed on the side wall of the observation hole; the transparent plate can be used for observing the condition of the material mixing and stirring operation in the working cavity, and the practicability of the device can be improved.

The utility model discloses an efficient polyester resin mixing arrangement, still include cleaning plate 26 and activity are detained, and the activity is detained the fixed installation and is provided with the spout on the preceding lateral wall of working chamber at the left end of cleaning plate 26, and the activity is detained the card and is adorned in the spout, and the left end of cleaning plate 26 is provided with foam-rubber cushion 27 to foam-rubber cushion 27 and transparent plate 24 contact, is provided with rocker 28 on transparent plate 24, and the front end of rocker 28 stretches out to the outside of working chamber; the user removes the rocker and can improve the cleaning strip and drive the foam-rubber cushion and remove to clean the surface of transparent plate, can improve the clean and tidy degree in surface of transparent plate.

The utility model discloses an efficient polyester resin mixing device, still include four groups of landing legs 29 and push rod 30, four groups of landing legs 29 are fixed mounting respectively in the left front side, right front side, left rear side and right rear side of machine case 1 bottom, four groups of landing legs 29 bottom all are provided with gyro wheel 31, the front side and the rear side of machine case 1 right-hand member are fixed mounting respectively have two sets of supports, the front end and the rear end of push rod 30 are connected with two sets of supports respectively; the user promotes the push rod accessible two sets of supports and drives quick-witted case and remove, and quick-witted case removes the accessible landing leg and removes and drive the gyro wheel and roll to move the device to suitable operating position.

The utility model discloses an efficient polyester resin mixing device, which also comprises two groups of fixed anchors 32, wherein the front side and the rear side of the bottom end of the case 1 are respectively provided with two groups of mounting rods, the two groups of fixed anchors 32 are respectively mounted at the bottom ends of the two groups of mounting rods, the bottom ends of the two groups of fixed anchors 32 are respectively provided with a non-slip mat 33, and the bottom ends of the two groups of non-slip mats 33 are respectively provided with a plurality of groups of non-slip lines; the user moves the anchor on the mounting rod into contact with the supporting ground, which improves the operational stability of the device.

The utility model discloses an efficient polyester resin mixing device, which also comprises a limiting frame 34, wherein the limiting frame 34 is fixedly arranged in a connecting groove, a limiting hole is arranged on the limiting frame 34, and a connecting rod passes through the limiting hole; the scraper blade can drive the connection lid at the in-process that removes and carry out the position and remove, and spacing can carry out the position to the connecting rod and prescribe a limit to improve the mobility stability of scraper blade.

The utility model discloses an efficient polyester resin mixing device, when in operation, a user firstly pushes a push rod to drive a case to move through two groups of supports, the case can move to drive a roller to roll through a support leg to move the device to a proper working position, the user moves a fixing anchor on an installation rod to contact with a supporting ground, the user moves a pull plate to drive a first baffle and a second baffle to move so as to facilitate the user to open or close the first baffle and the second baffle, the first baffle is opened and a plurality of raw materials required by work are put into a working cavity, a plurality of groups of stirring blades are driven to move through a transmission shaft after a driving motor is opened through the deceleration action of a speed reducer, so as to mix the raw materials in the working cavity, a servo motor drives a first driving frame to move along with the first driving frame through a movable roller, the first driving frame can rotate to drive a second driving frame through a connecting belt, thereby adjusting the position of the limiting frame, leading the bottom end of the limiting frame to be contacted with the bottom wall of the working cavity, leading the movable motor to drive the movable frame to move through the movable plate to drive the connecting rod to drive the scraper blade to move periodically, thereby utilizing the brush hair to clean the bottom of the working cavity, leading the working modes to be various, effectively cleaning the inner part of the working cavity after the device works for a long time, preventing partial waste materials from being retained in the working cavity for a long time, leading the upper supporting rod and the lower supporting rod to support the second baffle plate, improving the stability of the second baffle plate when a user opens the second baffle plate, leading the user to observe the condition of material mixing and stirring work in the working cavity through the transparent plate, leading the cleaning plate to move the sponge pad to move by moving a rocker of the user, leading the surface cleanness degree of the transparent plate to be improved, leading the scraper blade to drive the connecting cover to move in the, the limiting frame can limit the position of the connecting rod, so that the moving stability of the scraper is improved.

In the high-efficiency polyester resin mixing device of the present invention, unless otherwise stated, the terms "up, down, left, right, front, back, inner, front, rear, inner, and vertical, horizontal" and the like are included in the terms only to indicate the orientation of the term in the normal use state, or be a trivial term understood by those skilled in the art, and should not be considered as limiting the term, at the same time, the terms "first," "second," and "()" do not denote any particular quantity or order, but rather are used to distinguish one name from another, furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements, but also includes other elements not expressly listed or inherent to such process, method, article, or apparatus.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A high-efficiency polyester resin mixing device comprises a case (1), a driving motor (2), a speed reducer (3), a mounting rack (4) and an electric heating rod (5), wherein a working cavity is arranged in the case (1), feed inlets are arranged on the top end and the side plates of the case (1), the feed inlet and the discharge outlet are communicated with the working cavity, the side walls of the feed inlet and the discharge outlet are respectively provided with a first baffle (6) and a second baffle driving motor (2) which are arranged at the bottom end of the case (1), the reducer is fixedly arranged at the bottom end of the case (1), the reducer (3) is positioned at the output end of the driving motor (2), the output end of the reducer (3) is provided with a transmission shaft, a plurality of groups of stirring blades (7) are arranged at the outer output end of the transmission shaft, the mounting rack (4) is fixedly mounted at the bottom end of the case (1), the electric heating rod (5) is mounted on the mounting rack (4), and the electric heating rod (5) is in contact with the bottom end of the case (1); it is characterized by also comprising two groups of fixed frames (8), two groups of servo motors (9), two groups of connecting belts (10), two groups of movable frames (11), a connecting frame (12), a movable motor (13), an adjusting frame (15) and a scraper (19), wherein the two groups of fixed frames (8) are respectively and fixedly arranged at the front side and the rear side of the left side wall of the working cavity, the right ends of the two groups of fixed frames (8) are respectively provided with a fixed groove, the two groups of servo motors (9) are respectively and fixedly arranged in the two groups of fixed grooves, the output ends of the two groups of servo motors (9) are respectively provided with a movable roller (14), the two groups of movable rollers (14) are respectively and fixedly provided with two groups of first driving frames, the top ends of the two groups of movable frames (11) are respectively provided with a second driving frame (16), and the top ends and the bottom ends of the two groups of connecting, the front end and the rear end of link (12) are connected with two sets of adjustable shelf (11) respectively, the left end of link (12) is provided with the spread groove, and activity motor (13) are installed in the spread groove, the output of activity motor (13) is provided with fly leaf (17), is provided with movable groove on adjusting bracket (15), and fly leaf (17) clamp in movable groove, are provided with the connecting rod on adjusting bracket (15), the connecting rod is connected with scraper blade (19), and scraper blade (19) bottom is provided with multiunit brush hair (18), and adjustable shelf (11) left end articulates on the working chamber lateral wall.

2. The efficient polyester resin mixing device according to claim 1, further comprising two sets of pulling plates (20) and limiting plates (21), wherein the top end of the first baffle (6) and the right end of the second baffle are both provided with pulling grooves, the two sets of pulling plates (20) are respectively and fixedly installed in the two sets of pulling grooves, the right end of the case (1) is provided with a rotating shaft, the limiting plate (21) is provided with a rotating hole, the limiting plate (21) is installed on the rotating shaft, and the outer side wall of the rotating shaft is in contact with the inner side wall of the rotating hole.

3. The efficient mixing apparatus for polyester resin according to claim 2, further comprising two sets of upper support rods (22) and two sets of lower support rods (23), wherein the two sets of lower support rods (23) are respectively hinged to the front side and the rear side of the working chamber, the two sets of upper support rods (22) are respectively hinged to the front side and the rear side of the bottom end of the second baffle, and the bottom ends of the two sets of upper support rods (22) are respectively inserted into the top ends of the two sets of lower support rods (23).

4. A high-efficiency polyester resin mixing device as claimed in claim 3, further comprising a transparent plate (24) and two sets of baffle plates (25), wherein the two sets of baffle plates (25) are respectively and fixedly installed on the left side wall and the right side wall of the working chamber, the side wall of the case (1) is provided with an observation hole, the observation hole is communicated with the working chamber, and the transparent plate (24) is fixedly installed on the side wall of the observation hole.

5. The efficient polyester resin mixing device as claimed in claim 4, further comprising a cleaning plate (26) and a movable buckle, wherein the movable buckle is fixedly installed at the left end of the cleaning plate (26), a sliding groove is formed in the front side wall of the working chamber, the movable buckle is clamped in the sliding groove, a sponge pad (27) is arranged at the left end of the cleaning plate (26), the sponge pad (27) is in contact with the transparent plate (24), a rocker (28) is arranged on the transparent plate (24), and the front end of the rocker (28) extends out of the working chamber.

6. The efficient polyester resin mixing device according to claim 5, further comprising four sets of legs (29) and push rods (30), wherein the four sets of legs (29) are respectively and fixedly installed at the front left side, the front right side, the rear left side and the rear right side of the bottom end of the case (1), the bottom ends of the four sets of legs (29) are respectively provided with the rollers (31), the front side and the rear side of the right end of the case (1) are respectively and fixedly provided with two sets of brackets, and the front end and the rear end of the push rod (30) are respectively connected with the two sets of brackets.

7. The efficient polyester resin mixing device according to claim 6, further comprising two sets of fixing anchors (32), wherein two sets of mounting rods are respectively disposed on the front side and the rear side of the bottom end of the casing (1), two sets of fixing anchors (32) are respectively disposed at the bottom ends of the two sets of mounting rods, non-slip pads (33) are disposed at the bottom ends of the two sets of fixing anchors (32), and a plurality of sets of non-slip patterns are disposed at the bottom ends of the two sets of non-slip pads (33).

8. The efficient polyester resin mixing device according to claim 7, further comprising a limiting frame (34), wherein the limiting frame (34) is fixedly installed in the connecting groove, a limiting hole is formed in the limiting frame (34), and the connecting rod passes through the limiting hole.