CN113507787A - A conveyer with adjustable a distance for through-hole reflow soldering - Google Patents
A conveyer with adjustable a distance for through-hole reflow soldering Download PDFInfo
- Publication number
- CN113507787A CN113507787A CN202110682413.2A CN202110682413A CN113507787A CN 113507787 A CN113507787 A CN 113507787A CN 202110682413 A CN202110682413 A CN 202110682413A CN 113507787 A CN113507787 A CN 113507787A
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- CN
- China
- Prior art keywords
- negative pressure
- reflow soldering
- adjustable
- conveying
- pcb
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/3494—Heating methods for reflowing of solder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G17/00—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface
- B65G17/12—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface comprising a series of individual load-carriers fixed, or normally fixed, relative to traction element
- B65G17/123—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface comprising a series of individual load-carriers fixed, or normally fixed, relative to traction element arranged to keep the load-carriers horizontally during at least a part of the conveyor run
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G17/00—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface
- B65G17/26—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface comprising a series of co-operating units, e.g. interconnected by pivots
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G17/00—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface
- B65G17/30—Details; Auxiliary devices
- B65G17/32—Individual load-carriers
- B65G17/323—Grippers, e.g. suction or magnetic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/22—Devices influencing the relative position or the attitude of articles during transit by conveyors
- B65G47/26—Devices influencing the relative position or the attitude of articles during transit by conveyors arranging the articles, e.g. varying spacing between individual articles
- B65G47/28—Devices influencing the relative position or the attitude of articles during transit by conveyors arranging the articles, e.g. varying spacing between individual articles during transit by a single conveyor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
- B65G47/84—Star-shaped wheels or devices having endless travelling belts or chains, the wheels or devices being equipped with article-engaging elements
- B65G47/841—Devices having endless travelling belts or chains equipped with article-engaging elements
- B65G47/842—Devices having endless travelling belts or chains equipped with article-engaging elements the article-engaging elements being grippers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/02—Articles
- B65G2201/0214—Articles of special size, shape or weigh
- B65G2201/022—Flat
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Abstract
The invention discloses a conveying device with adjustable space for through-hole reflow soldering, which belongs to a conveying device and comprises a fixed frame, two groups of conveying belts which are symmetrically arranged, two negative pressure rails which are parallel to each other and a pneumatic clamping mechanism, wherein the two groups of conveying belts are arranged on the fixed frame; when the slide block is clamped into the negative pressure rail, the telescopic rod is driven by air pressure to extend until the clamping jaws clamp the PCB on the material guide plate, the PCB enters a welding processing area under the conveying of the conveying belt, after the slide block leaves the negative pressure rail, the return spring drives the telescopic rod to retract, and the clamping jaws are released from the PCB, so that the blanking is realized, the telescopic rod is automatically adapted to the position of the PCB, the PCB with different long specifications can be clamped, the universality is strong, the machine halt adjustment is not needed when the PCB with different specifications is replaced and processed, and the working hours are saved.
Description
Technical Field
The invention belongs to a conveying device, and particularly relates to a spacing-adjustable conveying device for through hole reflow soldering.
Background
Reflow soldering is widely used for soldering of chip components and through hole soldering of package components by heating air or nitrogen to a sufficiently high temperature and blowing the heated air or nitrogen to a circuit board on which components are already mounted to melt solder on both sides of the components and then bonding the melted solder to a main board.
Chinese patent (CN201821164339.5) discloses a conveying device for a reflow soldering machine with adjustable spacing, which belongs to the technical field of reflow soldering and solves the technical problem that the prior reflow soldering machine can only operate one type of PCB (printed circuit board), the technical scheme is characterized in that the conveying device comprises a machine body provided with an input end and an output end, a conveying track is arranged in the machine body, the conveying track is provided with the PCB, a conveying frame body is arranged in the machine body and comprises a first conveying frame and a second conveying frame which are opposite to each other, the first conveying frame is fixedly connected with the machine body, the conveying track comprises a first conveying chain which is rotatably connected with the first conveying frame and a second conveying chain which is rotatably connected with the second conveying frame, an adjusting screw rod is rotatably connected on the machine body and is vertical to the conveying direction of the conveying track, and two ends of the adjusting screw rod are respectively rotatably connected with the machine body and the first conveying frame, and is in threaded connection with the second conveying frame.
At present, when carrying out reflow soldering to different specification circuit boards, need adjust the conveyer in the reflow soldering machine, current conveyer all carries out whole interval control, this will make the width of the circuit board that is reflow soldering must keep unanimous, so, when the circuit board of changing different specifications carries out reflow soldering, just need the lamp area before a batch of circuit board all take out from conveyer after can adjust conveyer's interval, it is long when this lamp area that will increase processing, waste necessary man-hour.
Disclosure of Invention
The invention aims to: the space-adjustable conveying device for the through hole reflow soldering is provided for solving the problems that the conveying device can only adjust the whole width, and the space of the conveying device can be adjusted after all circuit boards in the conveying device are taken out, so that the machine halt waiting time is long, and the working hours are wasted.
In order to achieve the purpose, the invention adopts the following technical scheme: a conveying device with adjustable interval for through-hole reflow soldering comprises a fixing frame, two groups of conveying belts which are symmetrically arranged, two negative pressure tracks which are parallel to each other and a pneumatic clamping mechanism, wherein the two groups of conveying belts are arranged on the fixing frame;
pneumatic fixture includes telescopic link, slider and clamping jaw, telescopic link fixed connection in on the conveyer belt, the slider is located the one end of telescopic link, the slider joint in the negative pressure track, clamping jaw fixed connection in the other end of telescopic link, the air flue has been seted up on the slider, the air flue intercommunication orbital inside of negative pressure with the inside of telescopic link.
As a further description of the above technical solution:
the section of the negative pressure track is concave, and the section of the sliding block is T-shaped.
As a further description of the above technical solution:
and a sealing strip is arranged on the negative pressure track and is propped against the side wall of the sliding block.
As a further description of the above technical solution:
the both ends of negative pressure track all articulate there is the shrouding, the shrouding is located in the negative pressure track.
As a further description of the above technical solution:
and a return spring is connected between the clamping jaw and the sliding block.
As a further description of the above technical solution:
the clamping jaw is C-shaped.
As a further description of the above technical solution:
the fixed frame is provided with a material guide plate, the material guide plate is positioned between the two groups of conveyor belts, and the material guide plate is positioned at the end parts of the conveyor belts.
As a further description of the above technical solution:
the clamping jaw is provided with a flat pressing mechanism, the flat pressing mechanism comprises a flat pressing plate and an adjusting bolt, the flat pressing plate is located in the clamping jaw, the adjusting bolt penetrates through the clamping jaw and is connected with the flat pressing plate, and the adjusting bolt is in threaded connection with the clamping jaw.
As a further description of the above technical solution:
and the negative pressure track is connected with a plurality of air pressure holes.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the invention, when the slide block is clamped into the negative pressure track, the telescopic rod is driven by air pressure to extend until the clamping jaws clamp the PCB on the material guide plate, the PCB enters a welding processing area under the conveying of the conveying belt, after the slide block leaves the negative pressure track, the return spring drives the telescopic rod to retract, and the clamping jaws are released from the PCB, so that the blanking is realized, the telescopic rod is automatically adapted to the position of the PCB, the PCB with different long specifications can be clamped, the universality is strong, the machine halt adjustment is not needed when the PCB with different specifications is replaced and processed, and the working hours are saved.
2. According to the invention, the width of the clamping jaw can be adjusted by screwing the adjusting bolt, so that the clamping jaw is suitable for PCBs with different thicknesses, and the universality is strong.
Drawings
Fig. 1 is a schematic overall structure diagram of a pitch-adjustable transfer device for through-hole reflow soldering.
Fig. 2 is a partially enlarged view of a portion a in fig. 1.
FIG. 3 is a schematic view of a negative pressure rail in a pitch-adjustable transfer apparatus for through-hole reflow soldering.
FIG. 4 is a schematic diagram of a pneumatic clamping mechanism in a pitch-adjustable transfer apparatus for reflow soldering of through holes.
Illustration of the drawings:
1. a fixed mount; 2. a conveyor belt; 3. a negative pressure rail; 4. a pneumatic clamping mechanism; 41. a telescopic rod; 42. a slider; 43. a clamping jaw; 5. an airway; 6. a sealing strip; 7. closing the plate; 8. a return spring; 9. a material guide plate; 10. a flat pressing mechanism; 101. flattening the plate; 102. adjusting the bolt; 11. and an air pressure hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: a conveying device with adjustable interval for through-hole reflow soldering comprises a fixing frame 1, two groups of conveying belts 2 which are symmetrically arranged, two negative pressure rails 3 and a pneumatic clamping mechanism 4, wherein the two groups of conveying belts 2 are arranged on the fixing frame 1, the negative pressure rails 3 are fixedly connected to the fixing frame 1, the negative pressure rails 3 are located on one side of the conveying belts 2, a plurality of groups of pneumatic clamping mechanisms 4 are fixedly connected to the conveying belts 2, and one end of each pneumatic clamping mechanism 4 is slidably connected into the negative pressure rails 3;
the pneumatic clamping mechanism 4 comprises an expansion link 41, a sliding block 42 and a clamping jaw 43, the expansion link 41 is fixedly connected to the conveyor belt 2, the sliding block 42 is arranged at one end of the expansion link 41, the sliding block 42 is clamped in the negative pressure rail 3, the clamping jaw 43 is fixedly connected to the other end of the expansion link 41, an air passage 5 is formed in the sliding block 42, and the air passage 5 is communicated with the inside of the negative pressure rail 3 and the inside of the expansion link 41;
the section of the negative pressure track 3 is concave, and the section of the sliding block 42 is T-shaped, so that the sliding block 42 and the negative pressure track 3 are stably clamped, and the sliding block 42 can smoothly slide along the negative pressure track 3;
the sealing strip 6 is arranged on the negative pressure track 3, the sealing strip 6 props against the side wall of the sliding block 42, the sealing performance between the sliding block 42 and the negative pressure track 3 is guaranteed, air flow in the negative pressure track 3 stably acts on the telescopic rod 41, and the clamping jaw 43 is favorable for stably clamping a PCB;
both ends of the negative pressure track 3 are hinged with sealing plates 7, the sealing plates 7 are positioned in the negative pressure track 3, so that the sliding blocks 42 push the sealing plates 7 to rotate and smoothly enter in and out when entering in and out, and in other time, the sealing plates 7 plug both ends of the negative pressure track 3 under the action of air flow in the negative pressure track 3, so that the air tightness in the negative pressure track 3 is ensured;
a return spring 8 is connected between the clamping jaw 43 and the sliding block 42, after the sliding block 42 leaves the negative pressure rail 3, the telescopic rod 41 loses the air pressure effect in the negative pressure rail 3, and the return spring 8 drives the telescopic rod 41 to retract, so that the clamping jaw 43 is separated from the PCB;
the clamping jaw 43 is C-shaped;
the fixed frame 1 is provided with a material guide plate 9, the material guide plate 9 is positioned between the two groups of conveyor belts 2, the material guide plate 9 is positioned at the end part of the conveyor belts 2, when the PCB is positioned on the material guide plate 9, the slide block 42 is just clamped into the negative pressure track 3, and the telescopic rod 41 extends under the action of air pressure, so that the clamping jaw 43 clamps the PCB, and the PCB is brought into a processing area along the conveyor belts 2;
the clamping jaw 43 is provided with a flat pressing mechanism 10, the flat pressing mechanism 10 comprises a flat pressing plate 101 and an adjusting bolt 102, the flat pressing plate 101 is located in the clamping jaw 43, the adjusting bolt 102 penetrates through the clamping jaw 43 and is connected with the flat pressing plate 101, the adjusting bolt 102 is in threaded connection with the clamping jaw 43, and the flat pressing plate 101 can be driven to slide in the clamping jaw 43 by screwing the adjusting bolt 102, so that the PCB clamping device is suitable for PCBs with different thicknesses, and the universality is high;
be connected with a plurality of atmospheric pressure holes 11 on the negative pressure track 3, a plurality of atmospheric pressure holes 11 distribute on negative pressure track 3 for divide into a plurality of atmospheric pressure storehouses in the negative pressure track 3, thereby make slider 42 can obtain equal pressure in the different places homoenergetic that move in the negative pressure track 3, make the air current in the negative pressure track 3 act on telescopic link 41 steadily, be favorable to clamping jaw 43 steadily centre gripping PCB board.
The working principle is as follows: firstly, connecting a plurality of air pressure holes 11 on a negative pressure rail 3 with external air pressure equipment, so that the inside of the negative pressure rail 3 is divided into a plurality of air pressure bins, at the moment, closing plates 7 at two ends in the negative pressure rail 3 are in a closed state, placing a PCB (printed Circuit Board) at a material guide plate 9, secondly, a conveyor belt 2 operates to drive an expansion rod 41 to be linked with each other, when a slide block 42 is clamped in the negative pressure rail 3, the expansion rod 41 is driven by air pressure to extend until a clamping jaw 43 clamps the PCB on the material guide plate 9, the slide block 42 slides in the negative pressure rail 3 under the conveying of the conveyor belt 2, the PCB enters a welding processing area, then, after the slide block 42 leaves the negative pressure rail 3, a return spring 8 drives the expansion rod 41 to retract, the clamping jaw 43 is released from the PCB, so as to realize blanking, and finally, when the PCB with different thicknesses are processed, a flat pressing plate 101 can be driven to slide in the clamping jaw 43 by screwing an adjusting bolt 102, so as to adapt to the PCB with different thicknesses, the universality is strong.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The utility model provides a conveyer with adjustable a spacing for through-hole reflow soldering which characterized in that: the conveying device comprises a fixing frame (1), two groups of conveying belts (2) which are symmetrically arranged, two mutually parallel negative pressure rails (3) and a pneumatic clamping mechanism (4), wherein the two groups of conveying belts (2) are arranged on the fixing frame (1), the negative pressure rails (3) are fixedly connected to the fixing frame (1), the negative pressure rails (3) are positioned on one side of the conveying belts (2), a plurality of groups of pneumatic clamping mechanisms (4) are fixedly connected to the conveying belts (2), and one ends of the pneumatic clamping mechanisms (4) are slidably connected into the negative pressure rails (3);
pneumatic fixture (4) include telescopic link (41), slider (42) and clamping jaw (43), telescopic link (41) fixed connection in on conveyer belt (2), slider (42) are located the one end of telescopic link (41), slider (42) joint in negative pressure track (3), clamping jaw (43) fixed connection in the other end of telescopic link (41), air flue (5) have been seted up on slider (42), air flue (5) intercommunication the inside of negative pressure track (3) with the inside of telescopic link (41).
2. The adjustable-pitch conveying device for through-hole reflow soldering of claim 1, wherein the section of the negative pressure rail (3) is concave, and the section of the sliding block (42) is T-shaped.
3. The adjustable-spacing conveying device for through-hole reflow soldering of claim 1, wherein a sealing strip (6) is arranged on the negative pressure rail (3), and the sealing strip (6) abuts against the side wall of the sliding block (42).
4. The adjustable-pitch conveying device for through-hole reflow soldering of claim 1, wherein sealing plates (7) are hinged to both ends of the negative pressure rail (3), and the sealing plates (7) are located in the negative pressure rail (3).
5. The adjustable-pitch conveyor for through-hole reflow soldering according to claim 1, wherein a return spring (8) is connected between the clamping jaw (43) and the slider (42).
6. The adjustable-pitch conveyor for through-hole reflow soldering of claim 1, wherein the clamping jaws (43) are C-shaped.
7. The adjustable-pitch conveying device for through-hole reflow soldering according to claim 1, wherein a guide plate (9) is arranged on the fixing frame (1), the guide plate (9) is located between two sets of the conveying belts (2), and the guide plate (9) is located at the end of the conveying belts (2).
8. The conveying device with the adjustable spacing for through hole reflow soldering of claim 1, wherein a flat pressing mechanism (10) is arranged on the clamping jaw (43), the flat pressing mechanism (10) comprises a flat pressing plate (101) and an adjusting bolt (102), the flat pressing plate (101) is located in the clamping jaw (43), the adjusting bolt (102) penetrates through the clamping jaw (43) and is connected with the flat pressing plate (101), and the adjusting bolt (102) is in threaded connection with the clamping jaw (43).
9. The adjustable-pitch transfer device for through-hole reflow soldering according to claim 1, wherein a plurality of air pressure holes (11) are connected to the negative pressure rail (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110682413.2A CN113507787A (en) | 2021-06-18 | 2021-06-18 | A conveyer with adjustable a distance for through-hole reflow soldering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110682413.2A CN113507787A (en) | 2021-06-18 | 2021-06-18 | A conveyer with adjustable a distance for through-hole reflow soldering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113507787A true CN113507787A (en) | 2021-10-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110682413.2A Pending CN113507787A (en) | 2021-06-18 | 2021-06-18 | A conveyer with adjustable a distance for through-hole reflow soldering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113507787A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114506627A (en) * | 2021-12-29 | 2022-05-17 | 山西煤矿机械制造股份有限公司 | Detachable middle trough |
| CN114516432A (en) * | 2022-03-08 | 2022-05-20 | 保定一勺果球自动化科技有限公司 | Solid filling equipment, filling line and filling method |
| CN115091253A (en) * | 2022-07-26 | 2022-09-23 | 广东品图科技有限公司 | Transmission equipment who possesses tool transmission |
| CN117600543A (en) * | 2023-11-06 | 2024-02-27 | 河北卓骏汽车股份有限公司 | Plate shearing machine is used in semitrailer production |
-
2021
- 2021-06-18 CN CN202110682413.2A patent/CN113507787A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114506627A (en) * | 2021-12-29 | 2022-05-17 | 山西煤矿机械制造股份有限公司 | Detachable middle trough |
| CN114516432A (en) * | 2022-03-08 | 2022-05-20 | 保定一勺果球自动化科技有限公司 | Solid filling equipment, filling line and filling method |
| CN115091253A (en) * | 2022-07-26 | 2022-09-23 | 广东品图科技有限公司 | Transmission equipment who possesses tool transmission |
| CN117600543A (en) * | 2023-11-06 | 2024-02-27 | 河北卓骏汽车股份有限公司 | Plate shearing machine is used in semitrailer production |
| CN117600543B (en) * | 2023-11-06 | 2024-05-14 | 河北卓骏汽车股份有限公司 | Plate shearing machine is used in semitrailer production |
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