Pressurizing and curing equipment for external wall thermal insulation rock wool board

Abstract

The invention relates to the technical field of rock wool board production, in particular to pressurizing and curing equipment for an external wall heat preservation rock wool board, which comprises an equipment frame, a pressurizing seat is arranged on the equipment frame in a sliding fit manner, a mounting seat is fixedly mounted in the lower end of the pressurizing seat, a mold seat is fixedly mounted on the mounting seat, and the rock wool board is placed in the mold seat; a driving mechanism is fixedly connected into the mounting seat, a plurality of lubricating pipes are fixedly connected into the mounting seat, hole forming rods are arranged in the lubricating pipes, and an adjusting mechanism is rotatably connected into the mounting seat. And stress concentration generated in the demolding process can be avoided, so that the hole forming rods can be smoothly extracted from the sound absorption holes, the risk that cracks or damage occurs on the surface of the rock wool board is reduced, and the integrity and quality of the board are kept.

Description

Technical Field

[0001] The present invention relates to the technical field of rock wool board production, and particularly relates to a pressure curing device for exterior wall thermal insulation rock wool boards. Background Art

[0002] Exterior wall thermal insulation rock wool boards (also often referred to as rock wool boards) are common materials used for building exterior wall thermal insulation, especially for buildings with high energy conservation, environmental protection, and fire protection requirements. They are mainly made of natural rocks (such as basalt or diabase) that are melted at high temperatures and then made into fibrous substances by the centrifugal blowing method, and then processed through processes such as curing, forming, and cutting.

[0003] The pressure curing device for rock wool boards is mainly used in the production process of rock wool boards. Through the pressure and curing processes, the rock wool fibers are fully combined with the binder, thereby ensuring the structural stability, density, and strength of the rock wool boards. This device usually plays a crucial role in the thermal curing and pressing stages of rock wool boards.

[0004] Rock wool boards with sound absorption holes are a type of rock wool board that has been specially designed and processed to enhance its sound absorption performance and is widely used in the fields of acoustic insulation and noise reduction. In the prior art, when performing pressure curing on rock wool boards with sound absorption holes, since the die heads in the mold are fixed and do not rotate or loosen, the rock wool boards may be stuck by the die heads inside the sound absorption holes, and relatively large force may be required to demold them when taking them out, which may cause the sound absorption holes of the rock wool boards to crack or cracks to appear on the surface of the board, affecting the quality of the board.

[0005] In summary, in the prior art, there is a lack of auxiliary demolding technology for rock wool boards with sound absorption holes. Summary of the Invention

[0006] The purpose of the present invention is to solve the deficiencies in the background art, and a pressure curing device for exterior wall thermal insulation rock wool boards is proposed.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is: A pressure curing device for exterior wall thermal insulation rock wool boards, including a device frame, a pressure seat is slidably and cooperatively arranged on the device frame, an installation seat is fixedly installed inside the lower end of the pressure seat, a mold seat is fixedly installed on the installation seat, a rock wool board is placed inside the mold seat, a driving mechanism is fixedly connected and arranged inside the installation seat, a plurality of lubricating pipes are fixedly connected and arranged inside the installation seat, a hole-forming rod is arranged inside the lubricating pipe, and an adjusting mechanism is rotatably connected and arranged inside the installation seat.

[0008] Preferably, a hydraulic cylinder is fixedly connected to the pressure seat, and the hydraulic cylinder is fixedly connected to the device frame.

[0009] Preferably, the driving mechanism includes an electric push rod, one end of which is fixedly connected to the inner wall of the mounting seat, the output end of the electric push rod is fixedly connected to a driving rack, the driving rack is provided with a plurality of driving wheels in meshing transmission, the driving wheel is fixedly connected to a rotating shaft, one end of the rotating shaft is rotatably connected to the inner wall of the mounting seat, and the rotating shaft is fixedly connected to a plurality of driving wheels in a linear structure.

[0010] Preferably, the outer wall of the hole-forming rod is slidably fitted with the inner wall of the mold base, and a guide head is fixedly connected to the outer wall of the bottom end of the hole-forming rod.

[0011] Preferably, a transmission rod is slidably provided on the inner wall of the bottom end of the hole-forming rod, one end of the transmission rod is rotatably connected to the inner wall of the lubrication tube, and a driven wheel is fixedly connected to the outer end of the transmission rod, and the driven wheel is meshed with the driving wheel for transmission.

[0012] Preferably, a spiral groove is provided on the inner wall of the lubrication tube, and the inner wall of the spiral groove is slidably matched with the outer wall of the guide head. A drain pipe is fixedly connected between one side of the bottom ends of the plurality of lubrication tubes, and the other end of the drain pipe extends to the outside through the inner wall of the mounting seat and is fixedly connected with a valve. A liquid inlet pipe is fixedly connected between the other sides of the bottom ends of the plurality of lubrication tubes, and one end of the liquid inlet pipe extends to the outside through the inner wall of the mounting seat and is fixedly connected with a pump body, and a liquid storage tank is fixedly connected to the input end of the pump body.

[0013] Preferably, the adjustment mechanism includes a threaded rod, one end of which is fixedly connected to one of the rotating shafts, a movable frame is threadedly connected to the outer wall of the threaded rod, the movable frame is slidably matched with the inner wall of the mounting seat, and one end of the movable frame is fixedly connected to an adjustment rack.

[0014] Preferably, an adjusting wheel is provided on one side of the adjusting rack for meshing transmission, the adjusting wheel is rotatably connected to the inner wall of the mounting seat, a worm is fixedly connected to the adjusting wheel, a worm wheel is provided on one side of the worm for meshing transmission, an adjusting rod is fixedly connected to one end of the worm wheel, and one end of the adjusting rod is rotatably connected to the inner wall of the mounting seat.

[0015] Preferably, a ejection ring is provided in a sliding cooperation with the inner wall of the bottom end of the mold base, one end of the ejection ring is fixedly connected with two guide rods, the other end of the guide rod passes through the inner wall of the mold base and extends into the mounting base, a contact frame is fixedly connected between the two guide rods, the lower surface of the contact frame is in sliding contact with the outer wall of one end of the adjusting rod, and a spring is fixedly connected with the upper surface of the contact frame, and the other end of the spring is fixedly connected with the inner wall of the mounting base.

[0016] Compared with the prior art, the present invention has the following beneficial effects: By setting up a driving mechanism, when it is necessary to demold the rock wool board, driven by the driving mechanism, the hole-forming rod will move downward and rotate, which can avoid stress concentration during the demolding process, enabling the hole-forming rod to be smoothly extracted from the sound-absorbing holes on the rock wool board, reducing the risk of cracks or damage on the surface of the rock wool board, and maintaining the integrity and quality of the board; Meanwhile, by setting up a lubricating pipe, when demolding the rock wool board, the hole-forming rod can be retracted into the lubricating pipe, and at this time, automatic lubrication of the hole-forming rod will be achieved. This can effectively reduce the friction between the hole-forming rod and the rock wool board mold during its movement, reduce wear, not only extend the service life of the hole-forming rod, but also avoid possible resistance or jamming during demolding, thereby improving the efficiency of the demolding process and the integrity of the rock wool board during demolding; By setting up an adjusting mechanism, when the driving mechanism drives the hole-forming rod to retract, it can drive the adjusting rod to rotate, thereby driving the ejecting ring to move upward automatically, pushing the rock wool board out of the mold seat, ensuring the stability of the rock wool board during demolding, and avoiding surface damage or crack problems that may be caused by traditional demolding methods. Especially for the sound-absorbing hole rock wool board with fine and complex shapes, automatic demolding is more accurate. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of a pressure curing device for an exterior wall thermal insulation rock wool board according to the present invention; Figure 2 It is a schematic diagram of a partial cross-sectional view of a part of the structure of a pressure curing device for an exterior wall thermal insulation rock wool board according to the present invention; Figure 3 It is a schematic diagram of the structure of the pressure seat of a pressure curing device for an exterior wall thermal insulation rock wool board according to the present invention; Figure 4 It is a schematic diagram of the structure of the driving mechanism of a pressure curing device for an exterior wall thermal insulation rock wool board according to the present invention; Figure 5 It is a partial cross-sectional view schematic diagram of the hole-forming rod and other structures of a pressure curing device for an exterior wall thermal insulation rock wool board according to the present invention; Figure 6 It is a partial cross-sectional view schematic diagram of the lubricating pipe structure of a pressure curing device for an exterior wall thermal insulation rock wool board according to the present invention; Figure 7 It is a schematic diagram of the structure of the adjusting mechanism of a pressure curing device for an exterior wall thermal insulation rock wool board according to the present invention; Figure 8 It is a partial cross-sectional view schematic diagram of the mold seat structure of a pressure curing device for an exterior wall thermal insulation rock wool board according to the present invention.

[0018] The labels in the figure are: 1. Equipment rack; 2. Pressing seat; 3. Mounting seat; 4. Mold seat; 5. Rock wool board; 6. Driving mechanism; 7. Lubricating pipe; 8. Hole-forming rod; 9. Adjusting mechanism; 201. Hydraulic cylinder; 601. Electric push rod; 602. Driving rack; 603. Driving wheel; 604. Rotating shaft; 605. Driving gear; 801. Guide head; 802. Transmission rod; 803. Driven wheel; 701. Spiral groove; 702. Drain pipe; 703. Valve; 704. Liquid inlet pipe; 705. Pump body; 706. Liquid storage tank; 901. Threaded rod; 902. Moving frame; 903. Adjusting rack; 904. Adjusting wheel; 905. Worm; 906. Worm gear; 907. Adjusting rod; 401. Ejector ring; 402. Guide rod; 403. Contact frame; 404. Spring. Detailed implementation manners

[0019] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations.

[0020] As Figures 1 - 8 shown, a pressing and curing device for exterior wall thermal insulation rock wool board includes an equipment rack 1. A pressing seat 2 is slidably and cooperatively arranged on the equipment rack 1. An installation seat 3 is fixedly installed inside the lower end of the pressing seat 2. A mold seat 4 is fixedly installed on the installation seat 3. A rock wool board 5 is placed inside the mold seat 4. A driving mechanism 6 is fixedly connected inside the installation seat 3. A plurality of lubricating pipes 7 are fixedly connected inside the installation seat 3. A hole-forming rod 8 is arranged inside the lubricating pipe 7. An adjusting mechanism 9 is rotatably connected inside the installation seat 3.

[0021] As Figure 3 shown, a hydraulic cylinder 201 is fixedly connected to the pressing seat 2, and the hydraulic cylinder 201 is fixedly connected to the equipment rack 1. The connected pressing seat 2 is driven by the hydraulic cylinder 201 to be taken out from inside the mold seat 4.

[0022] As Figure 4 shown, the driving mechanism 6 includes an electric push rod 601. One end of the electric push rod 601 is fixedly connected to the inner wall of the installation seat 3. A driving rack 602 is fixedly connected to the output end of the electric push rod 601. A plurality of driving wheels 603 are meshingly driven on the driving rack 602. A rotating shaft 604 is fixedly connected to the driving wheel 603. One end of the rotating shaft 604 is rotatably connected to the inner wall of the installation seat 3. A plurality of driving gears 605 are fixedly connected to the rotating shaft 604 in a linear structure. The connected driving rack 602 is driven to move by the electric push rod 601. At this time, the driving rack 602 will drive the meshing driving wheel 603 to rotate, so that the driving wheel 603 drives the connected rotating shaft 604 to rotate, and the rotating shaft 604 drives a plurality of driving gears 605 to rotate.

[0023] AsFigure 5 As shown, the outer wall of the hole-forming rod 8 is in sliding fit with the inner wall of the mold base 4 through penetration, and a guiding head 801 is fixedly connected to the outer wall at the bottom end of the hole-forming rod 8.

[0024] A transmission rod 802 is in sliding fit with the inner wall at the bottom end of the hole-forming rod 8. One end of the transmission rod 802 is in rotational connection with the inner wall of the lubricating pipe 7 through penetration. A driven wheel 803 is fixedly connected to the outer end of the transmission rod 802, and the driven wheel 803 is in meshing transmission with the driving wheel 605. When the driving wheel 605 rotates, it will drive the driven wheel 803 to rotate, so that the driven wheel 803 drives the connected transmission rod 802 to rotate. At this time, the transmission rod 802 will drive the hole-forming rod 8 to rotate. At this time, the guiding head 801 at the bottom of the hole-forming rod 8 will slide in the spiral groove 701, so that the hole-forming rod 8 moves downward and is taken out from the rock wool board 5.

[0025] By setting the driving mechanism 6, when it is necessary to demold the rock wool board 5, driven by the driving mechanism 6, the hole-forming rod 8 will move downward and rotate, which can avoid stress concentration during the demolding process, so that the hole-forming rod 8 can be smoothly extracted from the sound-absorbing holes on the rock wool board 5, reducing the risk of cracks or damage on the surface of the rock wool board 5 and maintaining the integrity and quality of the board.

[0026] As Figure 6 shown, a spiral groove 701 is formed on the inner wall of the lubricating pipe 7. The inner wall of the spiral groove 701 is in sliding fit with the outer wall of the guiding head 801. A drain pipe 702 is fixedly connected between one sides at the bottom ends of multiple lubricating pipes 7. The other end of the drain pipe 702 passes through the inner wall of the mounting seat 3 and extends to the outside and is fixedly connected with a valve 703. A liquid inlet pipe 704 is fixedly connected between the other sides at the bottom ends of multiple lubricating pipes 7. One end of the liquid inlet pipe 704 passes through the inner wall of the mounting seat 3 and extends to the outside and is fixedly connected with a pump body 705. A liquid storage tank 706 is fixedly connected to the input end of the pump body 705. A capacitive sensor is installed in the lubricating pipe 7 to determine the liquid level height by measuring the capacitance change of the lubricating oil. The liquid level change will cause the change of the capacitance at both ends of the sensor, and then transmit the signal to the monitoring system to realize the timely addition of lubricating oil.

[0027] By opening the valve 703, the used lubricating oil in the lubricating pipe 7 will be discharged through the drain pipe 702 at this time. Then, the pump body 705 is used to pump out the lubricating oil in the liquid storage tank 706 and inject it into the lubricating pipe 7 through the liquid inlet pipe 704. At this time, the capacitive sensor in the lubricating pipe 7 can monitor the amount of lubricating oil added in real time.

[0028] The model of the pump body 705 is a gear pump of the Baldor 1800 series. Its principle is that through the mutual rotation of two meshing gears, the lubricating oil is driven to be sucked from the suction port, and the oil is pushed to the discharge port through the movement of the gears. The meshing of the gears clamps and presses the oil out, so the output flow is relatively stable.

[0029] As Figure 7 shown, the adjusting mechanism 9 includes a threaded rod 901. One end of the threaded rod 901 is fixedly connected to one of the rotating shafts 604. A moving frame 902 is threadedly connected to the outer wall of the threaded rod 901. The moving frame 902 is slidably engaged with the inner wall of the mounting seat 3. One end of the moving frame 902 is fixedly connected to an adjusting rack 903.

[0030] An adjusting wheel 904 is meshed and driven on one side of the adjusting rack 903. The adjusting wheel 904 is rotatably connected to the inner wall of the mounting seat 3. A worm 905 is fixedly connected to the adjusting wheel 904. A worm gear 906 is meshed and driven on one side of the worm 905. One end of the worm gear 906 is fixedly connected to an adjusting rod 907. One end of the adjusting rod 907 is rotatably connected to the inner wall of the mounting seat 3. When the rotating shaft 604 rotates, it will drive the connected threaded rod 901 to rotate, causing the threaded rod 901 to drive the moving frame 902 to move. At this time, the moving frame 902 will drive the connected adjusting rack 903 to move. At this time, the adjusting rack 903 will drive the adjusting wheel 904 to rotate, causing the adjusting wheel 904 to drive the connected worm 905 to rotate, enabling the worm 905 to drive the worm gear 906 to rotate, causing the worm gear 906 to drive the connected adjusting rod 907 to rotate.

[0031] As Figure 8 shown, a blanking ring 401 is slidably engaged with the inner wall of the bottom end of the mold base 4. Two guide rods 402 are fixedly connected to one end of the blanking ring 401. The other ends of the guide rods 402 pass through the inner wall of the mold base 4 and extend into the mounting seat 3. A contact frame 403 is fixedly connected between the two guide rods 402. The lower surface of the contact frame 403 is in sliding contact with the outer wall of one end of the adjusting rod 907. A spring 404 is fixedly connected to the upper surface of the contact frame 403. The other end of the spring 404 is fixedly connected to the inner wall of the mounting seat 3. The spring 404 realizes the automatic reset of the blanking ring 401. The adjusting rod 907 rotates, thereby contacting and lifting the contact frame 403, causing the contact frame 403 to drive the blanking ring 401 connected to the guide rods 402 to move upward, enabling the blanking ring 401 to eject the rock wool board 5 from the mold base 4 to complete demolding.

[0032] Working principle: When it is necessary to demold the rock wool board 5, first use the hydraulic cylinder 201 to drive the connected pressure seat 2 to be taken out of the mold base 4, and then use the electric push rod 601 to drive the connected drive rack 602 to move. At this time, the drive rack 602 will drive the engaged drive wheel 603 to rotate, causing the drive wheel 603 to drive the connected rotating shaft 604 to rotate, enabling the rotating shaft 604 to drive a plurality of driving wheels 605 to rotate; Then when the driving wheel 605 rotates, it will drive the driven wheel 803 to rotate, causing the driven wheel 803 to drive the connected transmission rod 802 to rotate. At this time, the transmission rod 802 will drive the hole-forming rod 8 to rotate. At this time, the guiding head 801 at the bottom of the hole-forming rod 8 will slide in the spiral groove 701, so that the hole-forming rod 8 moves downward, is taken out from the rock wool board 5, and retracted into the lubricating pipe 7. At this time, the lubricating oil in the lubricating pipe 7 adheres to the hole-forming rod 8 for lubrication; At the same time, when the rotating shaft 604 rotates, it will drive the connected threaded rod 901 to rotate, causing the threaded rod 901 to drive the moving frame 902 to move. At this time, the moving frame 902 will drive the connected adjusting rack 903 to move. At this time, the adjusting rack 903 will drive the adjusting wheel 904 to rotate, causing the adjusting wheel 904 to drive the connected worm 905 to rotate, so that the worm 905 can drive the worm gear 906 to rotate, causing the worm gear 906 to drive the connected adjusting rod 907 to rotate, thereby contacting and lifting the contact frame 403, so that the contact frame 403 will drive the ejector ring 401 connected to the guiding rod 402 to move upward, so that the ejector ring 401 ejects the rock wool board 5 from the mold base 4 to complete demolding; After the device has been used for a period of time, by opening the valve 703, the used lubricating oil in the lubricating pipe 7 will be discharged through the drain pipe 702 to replace the lubricating oil. Then, the lubricating oil in the liquid storage tank 706 is pumped out by the pump body 705 and injected into the lubricating pipe 7 through the inlet pipe 704. At this time, the capacitive sensor in the lubricating pipe 7 can monitor the amount of lubricating oil added in real time.

[0033] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressurized curing device for exterior wall thermal insulation rock wool panels, comprising a device frame (1), characterized in that: A pressurizing seat (2) is slidably provided on the equipment frame (1), a mounting seat (3) is fixedly installed in the lower end of the pressurizing seat (2), a mold seat (4) is fixedly installed on the mounting seat (3), a rock wool board (5) is placed in the mold seat (4), a driving mechanism (6) is fixedly connected to the mounting seat (3), a plurality of lubrication pipes (7) are fixedly connected to the mounting seat (3), a hole forming rod (8) is provided in the lubrication pipe (7), and an adjustment mechanism (9) is rotatably connected to the mounting seat (3).

2. The pressurized curing equipment for exterior wall thermal insulation rock wool board according to claim 1 is characterized in that: A hydraulic cylinder (201) is fixedly connected to the pressurizing seat (2), and the hydraulic cylinder (201) is fixedly connected to the equipment frame (1).

3. The pressurized curing equipment for exterior wall thermal insulation rock wool board according to claim 1, characterized in that: The driving mechanism (6) comprises an electric push rod (601), one end of the electric push rod (601) being fixedly connected to the inner wall of the mounting seat (3), the output end of the electric push rod (601) being fixedly connected to a driving rack (602), a plurality of driving wheels (603) being meshingly provided on the driving rack (602), a rotating shaft (604) being fixedly connected to the driving wheel (603), one end of the rotating shaft (604) being rotatably connected to the inner wall of the mounting seat (3), and a plurality of driving wheels (605) being fixedly connected to the rotating shaft (604) in a linear structure.

4. The pressurized curing equipment for exterior wall thermal insulation rock wool board according to claim 1 is characterized in that: The outer wall of the hole-forming rod (8) is slidably fitted into the inner wall of the mold base (4), and a guide head (801) is fixedly connected to the outer wall of the bottom end of the hole-forming rod (8).

5. The pressurized curing equipment for exterior wall thermal insulation rock wool board according to claim 3 is characterized in that: A transmission rod (802) is slidably provided on the inner wall of the bottom end of the hole-forming rod (8); one end of the transmission rod (802) is rotatably connected to the inner wall of the lubrication tube (7); a driven wheel (803) is fixedly connected to the outer end of the transmission rod (802); and the driven wheel (803) is meshed with the driving wheel (605) for transmission.

6. The pressurized curing equipment for exterior wall thermal insulation rock wool board according to claim 4, characterized in that: The inner wall of the lubrication tube (7) is provided with a spiral groove (701), and the inner wall of the spiral groove (701) is slidably matched with the outer wall of the guide head (801). A liquid discharge pipe (702) is fixedly connected between one side of the bottom ends of the plurality of lubrication tubes (7), and the other end of the liquid discharge pipe (702) passes through the inner wall of the mounting seat (3) to extend to the outside and is fixedly connected to a valve (703). A liquid inlet pipe (704) is fixedly connected between the other sides of the bottom ends of the plurality of lubrication tubes (7), and one end of the liquid inlet pipe (704) passes through the inner wall of the mounting seat (3) to extend to the outside and is fixedly connected to a pump body (705), and the input end of the pump body (705) is fixedly connected to a liquid storage tank (706).

7. The pressurized curing equipment for exterior wall thermal insulation rock wool board according to claim 1, characterized in that: The adjustment mechanism (9) comprises a threaded rod (901), one end of the threaded rod (901) being fixedly connected to one of the rotating shafts (604), a movable frame (902) being threadedly connected to the outer wall of the threaded rod (901), the movable frame (902) being slidably matched with the inner wall of the mounting seat (3), and one end of the movable frame (902) being fixedly connected to an adjustment rack (903).

8. The pressurized curing equipment for exterior wall thermal insulation rock wool board according to claim 7, characterized in that: An adjusting wheel (904) is provided on one side of the adjusting rack (903) in meshing transmission, the adjusting wheel (904) is rotatably connected to the inner wall of the mounting seat (3), a worm (905) is fixedly connected to the adjusting wheel (904), a worm wheel (906) is provided on one side of the worm (905) in meshing transmission, an adjusting rod (907) is fixedly connected to one end of the worm wheel (906), and one end of the adjusting rod (907) is rotatably connected to the inner wall of the mounting seat (3).

9. The pressurized curing equipment for exterior wall thermal insulation rock wool board according to claim 8, characterized in that: A material ejection ring (401) is slidably provided on the inner wall of the bottom end of the mold base (4); one end of the material ejection ring (401) is fixedly connected to two guide rods (402); the other end of the guide rod (402) passes through the inner wall of the mold base (4) and extends into the mounting base (3); a contact frame (403) is fixedly connected between the two guide rods (402); the lower surface of the contact frame (403) is slidably contacted with the outer wall of one end of the adjustment rod (907); a spring (404) is fixedly connected to the upper surface of the contact frame (403); the other end of the spring (404) is fixedly connected to the inner wall of the mounting base (3).

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