阅读说明：本技术 一种水性湿法制造汽车顶棚发泡材料的工艺 (Process for manufacturing automobile ceiling foaming material by water-based wet method ) 是由 张剑 于 2021-08-02 设计创作，主要内容包括：本发明涉及汽车制造技术领域,尤其是一种水性湿法制造汽车顶棚发泡材料的工艺,针对现有技术中干法发泡限制大、切割装置使用不方便的问题,现提出如下方案,其包括以下步骤：S1、原料配置：多元醇100份、异氰酸酯类45-47份,发泡剂3.5-4.5份,催化剂0.5-1份,泡沫稳定剂0.5份,阻燃剂15-20份,防老剂0.1-0.5份,以上组分均按重量份计。本发明结构合理,结构稳定,操作简单,不仅有效的节省了发泡材料的生产工时,有效的对VOC进行控制,还能够对发泡材料进行快速切割,有效的提高了生产效率,并且对切割过程产生的碎屑进行收集,有效的对生产环境进行保护,易于推广使用。(The invention relates to the technical field of automobile manufacturing, in particular to a process for manufacturing an automobile ceiling foaming material by a water-based wet method, which aims at solving the problems of large limitation on dry foaming and inconvenient use of a cutting device in the prior art and provides the following scheme, comprising the following steps of: s1, raw material preparation: 100 parts of polyol, 45-47 parts of isocyanate, 3.5-4.5 parts of foaming agent, 0.5-1 part of catalyst, 0.5 part of foam stabilizer, 15-20 parts of flame retardant and 0.1-0.5 part of anti-aging agent, wherein the components are calculated according to parts by weight. The device has the advantages of reasonable structure, stable structure and simple operation, not only effectively saves the production time of the foaming material and effectively controls VOC, but also can quickly cut the foaming material, effectively improves the production efficiency, collects the scraps generated in the cutting process, effectively protects the production environment and is easy to popularize and use.)

1. The process for manufacturing the automobile ceiling foaming material by the water-based wet method is characterized by comprising the following steps of:

s1, raw material preparation: 100 parts of polyol, 45-47 parts of isocyanate, 3.5-4.5 parts of foaming agent, 0.5-1 part of catalyst, 0.5 part of foam stabilizer, 15-20 parts of flame retardant and 0.1-0.5 part of anti-aging agent, wherein the components are calculated according to parts by weight;

s2, sequentially adding the components weighed in the step S1 into a reaction kettle, adjusting the rotating speed of a stirring paddle in the reaction kettle to be 380 and 420r/min, and stirring for 30min to fully foam;

s3, introducing the raw material foamed in the step S2 into an extruder, fixedly connecting an output end of the extruder with an input end of a die, and extruding and molding the foamed raw material from the die to obtain a foamed material;

s4, detecting the foam material extruded and molded in the step S3, and performing the next production operation after the detection is qualified;

s5, cutting the qualified foaming material obtained in the step S4 by using a cutting device to obtain a foaming material with a designed size;

and S6, carrying out die pressing on the foaming material obtained in the step S5 by using a die to obtain a finished product of the automobile roof.

2. The process for preparing the foaming material for the automobile ceiling by the aqueous wet method according to claim 1, wherein the polyol is polyether polyol or polyester polyol, the isocyanate is toluene diisocyanate or 4,4' -diphenylmethane diisocyanate, the foaming agent is water, the catalyst is prepared by mixing organic tin and tertiary amine, wherein the organic tin is 0.3-0.5 part, the tertiary amine is 0.2-0.3 part, the flame retardant is any one of TDCPP, MMP, FB, ammonium polyphosphate and triphenyl phosphate, and the anti-aging agent is antioxidant 1076 (beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate).

3. The process for preparing foamed material for automobile roofs by aqueous wet method according to claim 1, it is characterized in that the cutting device comprises a box body (1), the top of the inner side of the box body (1) is fixedly connected with a mounting plate (2), the top of the mounting plate (2) is provided with two groups of clamping mechanisms, the top of the box body (1) is fixedly connected with a U-shaped bracket (3), a PLC (programmable logic controller) controller (23) is arranged outside one side of the U-shaped bracket (3), a plurality of groups of first electric telescopic rods (4) are fixedly connected with the outer parts of the two sides of the U-shaped bracket (3), the extension ends of the plurality of groups of first electric telescopic rods (4) extend to the inner side of the U-shaped bracket (3) and are fixedly connected with the outer parts of the sides of the two groups of clamping mechanisms which are far away from each other respectively, two sets of cutting machines (19) are installed at the top of U-shaped support (3), and are two sets of cutting machines (19) all are located mounting panel (2) directly over.

4. The process for manufacturing the automobile ceiling foaming material by the aqueous wet method according to claim 3, wherein the clamping mechanism comprises a clamping plate (5), a first transmission belt (7), a butt plate (9), a second electric telescopic rod (10) and a second transmission belt (24), the clamping plate (5) is of a U-shaped structure, the outer wall of the clamping plate (5) is fixedly connected with the extending end of the first electric telescopic rod (4), the first transmission belt (7) is installed at the bottom of the clamping plate (5), a plurality of groups of the second electric telescopic rods (10) are fixedly connected at the top of the outer side of the clamping plate (5), the extending ends of the plurality of groups of the second electric telescopic rods (10) extend into the clamping plate (5) and are fixedly connected with the top of the butt plate (9), and the second transmission belt (24) is installed on the butt plate (9).

5. The process for manufacturing the foaming material for the automobile ceiling by the aqueous wet method according to claim 4, wherein the two ends of the bottom of the clamping plates (5) are respectively provided with a driving roller (6), the first transmission belt (7) is movably sleeved outside the two groups of driving rollers (6), and the outside of one side of the two groups of clamping plates (5) away from each other is provided with a driving motor (8) for driving the driving rollers (6) to rotate.

6. The process for manufacturing the automobile ceiling foaming material by the aqueous wet method according to claim 4, wherein rotating rollers (11) are mounted at both ends of the abutting plate (9), two sets of the rotating rollers (11) are arranged along the width direction of the abutting plate (9), and the second transmission belt (24) is movably sleeved outside the two sets of the rotating rollers (11).

7. The process for manufacturing the foaming material for the automobile ceiling by the aqueous wet method according to claim 4, wherein a bottom plate (12) is fixedly connected to the bottom of the clamping plate (5), a plurality of groups of balls (13) are roll-mounted on the bottom of the bottom plate (12), and the bottoms of the plurality of groups of balls (13) extend to the bottom of the bottom plate (12) to be abutted against the top plate of the mounting plate (2).

8. The process for manufacturing the foaming material for the automobile ceiling by the aqueous wet method according to claim 3, wherein the top of the U-shaped support (3) is provided with a mounting groove (14) along the length direction thereof, the inside of the mounting groove (14) is slidably connected with two sets of sliding blocks (15), the tops of the two sets of sliding blocks (15) are fixedly connected with mounting sleeves (16), both ends of the top of the U-shaped support (3) are fixedly connected with third electric telescopic rods (17), the extending ends of the two sets of third electric telescopic rods (17) are fixedly connected with the outer walls of the sides of the two sets of mounting sleeves (16) far away from each other, the bottoms of the two sets of mounting sleeves (16) extend to the inside of the U-shaped support (3) through the mounting groove (14), the tops of the inner sides of the two sets of mounting sleeves (16) are fixedly connected with fourth electric telescopic rods (18), and the cutting machine (19) is slidably connected inside the mounting sleeves (16), and the top of the cutting machine (19) is fixedly connected with the extending end of the fourth electric telescopic rod (18).

9. The process for manufacturing the foaming material for the automobile ceiling by the aqueous wet method according to claim 3, wherein two sets of slide rails (20) are fixedly connected to the bottom of the inner side of the box body (1), a storage box (21) is slidably connected to the tops of the two sets of slide rails (20), the top of the storage box (21) is provided with an opening, the storage box (21) is positioned right below the mounting plate (2), and a cleaning door (22) is externally mounted on one side of the front surface of the box body (1).

Technical Field

The invention relates to the field of automobile manufacturing, in particular to a process for manufacturing an automobile ceiling foaming material by a water-based wet method.

Background

The new material technology is the leader of modern social economy, is safe and environment-friendly, and has light weight, which is the mainstream trend of the current automobile industry.

According to the clear requirements in the mandatory standard quotation comments of "air quality evaluation guidelines in passenger cars", which is newly released by the ministry of environmental protection: from 1 month 1 day 2017, all newly-sized sales vehicles must meet the requirements of the standard; and for the vehicle which is fixed before, strict execution is started from 7/1 in 2018. The new standard suggestions are further limited by the limits of harmful substances such as benzene, toluene and the like.

The automobile ceiling forming in the prior art mostly uses dry foaming, and due to the limitation of materials and processes, the dry foaming has great limitations in the aspects of VOC, deformation, forming rate, process adaptability and the like, but the dry process cannot be effectively improved due to the high use ratio of hard foam polyether and foaming auxiliary agent, the current dry sheet cannot meet the national mandatory VOC requirement, the produced foaming material needs further operations such as cutting, mould pressing and the like, the structure of the traditional cutting device is often simpler, the use is inconvenient, and the production efficiency is lower.

Disclosure of Invention

The invention provides a process for manufacturing a foaming material for an automobile ceiling by a water-based wet method, which solves the problems of large limitation of dry foaming and inconvenient use of a cutting device in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

a process for manufacturing a foaming material for an automobile ceiling by an aqueous wet method comprises the following steps:

s1, raw material preparation: 100 parts of polyol, 45-47 parts of isocyanate, 3.5-4.5 parts of foaming agent, 0.5-1 part of catalyst, 0.5 part of foam stabilizer, 15-20 parts of flame retardant and 0.1-0.5 part of anti-aging agent, wherein the components are calculated according to parts by weight;

s2, sequentially adding the components weighed in the step S1 into a reaction kettle, adjusting the rotating speed of a stirring paddle in the reaction kettle to be 380 and 420r/min, and stirring for 30min to fully foam;

s3, introducing the raw material foamed in the step S2 into an extruder, fixedly connecting an output end of the extruder with an input end of a die, and extruding and molding the foamed raw material from the die to obtain a foamed material;

s4, detecting the foam material extruded and molded in the step S3, and performing the next production operation after the detection is qualified;

s5, cutting the qualified foaming material obtained in the step S4 by using a cutting device to obtain a foaming material with a designed size;

and S6, carrying out die pressing on the foaming material obtained in the step S5 by using a die to obtain a finished product of the automobile roof.

Preferably, the polyol is polyether polyol or polyester polyol, the isocyanate is toluene diisocyanate or 4,4' -diphenylmethane diisocyanate, the foaming agent is water, the catalyst is prepared by mixing organic tin and tertiary amine, wherein the organic tin is 0.3-0.5 part, the tertiary amine is 0.2-0.3 part, the flame retardant is any one of TDCPP, MMP, FB, ammonium polyphosphate and triphenyl phosphate, and the anti-aging agent is an antioxidant 1076 (beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate).

Preferably, cutting device includes the box, the inboard top rigid coupling of box has the mounting panel, the top of mounting panel is provided with two sets of fixture, the top rigid coupling of box has the U-shaped support, one side externally mounted of U-shaped support has the PLC controller, the equal rigid coupling in both sides outside of U-shaped support has the first electric telescopic handle of multiunit, multiunit the inboard of first electric telescopic handle all extends to the U-shaped support one side outside rigid coupling of keeping away from each other with two sets of fixture respectively, two sets of cutting machines are installed at the top of U-shaped support, and are two sets of the cutting machine all is located the mounting panel directly over.

Preferably, fixture includes grip block, first transmission belt, butt plate, second electric telescopic handle, second transmission belt, the grip block is the U-shaped structure, the outer wall of grip block and first electric telescopic handle's extension end rigid coupling, first transmission belt installs in the bottom of grip block, the multiunit the equal rigid coupling of second electric telescopic handle is at the outside top of grip block, and multiunit second electric telescopic handle's extension end all extends to the inside of grip block and the top rigid coupling of butt plate, second transmission belt installs on the butt plate.

Preferably, the driving roller is all installed at the bottom both ends of grip block, first transmission belt movable sleeve is established in the outside of two sets of driving rollers, and is two sets of one side outside that the grip block kept away from each other is all installed and is used for driving roller pivoted driving motor.

Preferably, the two ends of the butt plate are provided with the rotary rollers, the rotary rollers are arranged along the width direction of the butt plate, and the second transmission belt is movably sleeved outside the two rotary rollers.

Preferably, the bottom rigid coupling of grip block has the bottom plate, the bottom roll of bottom plate installs the multiunit ball, the multiunit the bottom of ball all extends to the bottom of bottom plate and the roof butt of mounting panel.

Preferably, the mounting groove has been seted up along its length direction at the top of U-shaped support, the inside sliding connection of mounting groove has two sets of sliders, and is two sets of the equal rigid coupling in top of slider has the installation cover, the equal rigid coupling in top both ends of U-shaped support has third electric telescopic handle, and is two sets of third electric telescopic handle's extension end respectively with the mutual one side outer wall rigid coupling of keeping away from of two sets of installation covers, two sets of the bottom of installation cover all runs through the inside that the mounting groove extended to the U-shaped support, and the equal rigid coupling in inboard top of two sets of installation covers has fourth electric telescopic handle, the cutting machine sliding connection is in the inside of installation cover, and the top of cutting machine and fourth electric telescopic handle's extension end rigid coupling.

Preferably, the inboard bottom rigid coupling of box has two sets of slide rails, and is two sets of the top sliding connection of slide rail has the receiver, the opening has been seted up at the top of receiver, and the receiver is located the mounting panel under, the positive one side externally mounted of box has the cleaning door.

The invention has the beneficial effects that:

1. compared with the traditional dry foaming process, the deformation amount of the wet foaming can be freely adjusted according to the design and the industry of the vehicle type, the wet foaming process can effectively save 15-30% of working hours, and the VOC can be effectively controlled by adopting full water foaming.

2. Through mutually supporting such as first electric telescopic handle, grip block, butt joint board, second electric telescopic handle, first transmission belt, second transmission belt, the realization carries out centre gripping and transport to expanded material, and installation cover, third electric telescopic handle, fourth electric telescopic handle, cutting machine mutually support, realize cutting the expanded material of transport to adjust wantonly the cutting width to expanded material, the effectual cutting efficiency who improves expanded material.

3. Through mutually supporting such as mounting panel, slide rail, receiver, clearance door, the piece that the realization produced the cutting process is collected, prevents that the piece that the cutting produced from diffusing everywhere and polluting the production environment, keeps the production environment clean and tidy.

The device has the advantages of reasonable structure, stable structure and simple operation, not only effectively saves the production time of the foaming material and effectively controls VOC, but also can quickly cut the foaming material, effectively improves the production efficiency, collects the scraps generated in the cutting process, effectively protects the production environment and is easy to popularize and use.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a front cross-sectional view of the present invention.

Fig. 3 is an enlarged view of the present invention at a.

Fig. 4 is a right side cross-sectional view of the present invention.

Fig. 5 is an enlarged view of the invention at B.

Reference numbers in the figures: 1. a box body; 2. mounting a plate; 3. a U-shaped bracket; 4. a first electric telescopic rod; 5. a clamping plate; 6. a driving roller; 7. a first transfer belt; 8. a drive motor; 9. a butt joint plate; 10. a second electric telescopic rod; 11. rotating the roller; 12. a base plate; 13. a ball bearing; 14. mounting grooves; 15. a slider; 16. installing a sleeve; 17. a third electric telescopic rod; 18. a fourth electric telescopic rod; 19. a cutter; 20. a slide rail; 21. a storage box; 22. cleaning the door; 23. a PLC controller; 24. a second transfer belt.

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.

Referring to fig. 1 to 4, a process for manufacturing a foamed material for an automobile ceiling by an aqueous wet method includes the following steps:

s1, raw material preparation: 100 parts of polyol, 45-47 parts of isocyanate, 0.3-0.5 part of organic tin and 0.2-0.3 part of tertiary amine, wherein the polyol is polyether polyol or polyester polyol, the foaming agent is toluene diisocyanate or 4,4' -diphenylmethane diisocyanate, the foaming agent is water, the catalyst is 0.5-1 part of catalyst, the catalyst is prepared by mixing organic tin and tertiary amine, the organic tin is 0.3-0.5 part of the tertiary amine and mainly promotes the reaction between isocyanate and hydroxyl, the tertiary amine is mainly promotes the reaction between isocyanate and water, the organic tin and the tertiary amine are matched with each other to adjust the balance among the chain growth speed, the gel speed and the foaming speed in the foaming process, the foam stabilizer is 0.5 part of the foam stabilizer, 15-20 parts of flame retardant, the flame retardant is any one of TDCPP, MMP, FB, ammonium polyphosphate and triphenyl phosphate, and the anti-aging agent is 0.1-0.5 part of the flame retardant, the anti-aging agent is antioxidant 1076 beta-3, 5-di-tert-butyl-4-hydroxyphenyl propionic acid n-octadecyl ester, and the components are calculated according to parts by weight;

s2, sequentially adding the components weighed in the step S1 into a reaction kettle, adjusting the rotating speed of a stirring paddle in the reaction kettle to be 380 and 420r/min, and stirring for 30min to fully foam;

s3, introducing the raw material foamed in the step S2 into an extruder, fixedly connecting an output end of the extruder with an input end of a die, and extruding and molding the foamed raw material from the die to obtain a foamed material;

s4, detecting the foam material extruded and molded in the step S3, and performing the next production operation after the detection is qualified;

s5, cutting the qualified foaming material obtained in the step S4 by using a cutting device to obtain a foaming material with a designed size;

and S6, carrying out die pressing on the foaming material obtained in the step S5 by using a die to obtain a finished product of the automobile roof.

The cutting device comprises a box body 1, an opening is formed in the top of the box body 1, a mounting plate 2 is fixedly connected to the top of the inner side of the box body 1, the mounting plate 2 is arranged along the length direction of the box body 1, a mounting groove 14 is formed in the top of a U-shaped support 3 along the length direction of the U-shaped support, the mounting groove 14 is located right above the mounting plate 2 and is parallel to the mounting plate 2, two groups of sliders 15 are slidably connected to the inside of the mounting groove 14, mounting sleeves 16 are fixedly connected to the tops of the two groups of sliders 15, the bottoms of the two groups of mounting sleeves 16 extend into the U-shaped support 3 through the mounting groove 14, a fourth electric telescopic rod 18 is fixedly connected to the top of the inner side of the two groups of mounting sleeves 16, a cutting machine 19 is slidably connected to the inside of the mounting sleeves 16, the top of the cutting machine 19 is fixedly connected to the extending end of the fourth electric telescopic rod 18, the cutting machine 19 is an electric double-saw type cutting machine, the fourth electric telescopic rod 18 extends, the cutting machine 19 is pushed out of the mounting sleeves 16, the saw blade descends, be convenient for cut foaming material, 18 shrink of fourth electric telescopic handle, 19 motions of cutting machine are to the inside of installation cover 16, the equal rigid coupling in top both ends of U-shaped support 3 has third electric telescopic handle 17, the extension end of two sets of third electric telescopic handle 17 respectively with the one side outer wall rigid coupling that 16 two sets of installation covers kept away from each other, through the extension or the shrink of controlling two sets of third electric telescopic handle 17, the convenience is adjusted foaming material's cutting width and cutting orbit, effectual improvement foaming material's cutting efficiency.

The top of mounting panel 2 is provided with two sets of fixture, fixture includes grip block 5, grip block 5 is the U-shaped structure, the bottom rigid coupling of grip block 5 has bottom plate 12, bottom plate 12's bottom is rolled and is installed multiunit ball 13, the bottom of multiunit ball 13 all extends to bottom plate 12's bottom and mounting panel 2's roof butt, multiunit ball 13 is effectual to have reduced the frictional force between bottom plate 12 and the mounting panel 2, there is the first electric telescopic handle 4 of multiunit in the outside rigid coupling in both sides of U-shaped support 3, the extension end of the first electric telescopic handle 4 of multiunit all extends to the inboard of U-shaped support 3 respectively with the outside rigid coupling in one side that two sets of fixture kept away from each other, two sets of first electric telescopic handle 4 extensions, with the 5 one side motions that are close to each other of two sets of grip blocks, and then conveniently carry out the centre gripping to the expanded material of different widths.

Be provided with butt plate 9 in grip block 5 inside, there are multiunit second electric telescopic handle 10 at the outside top rigid coupling of grip block 5, and the extension end of multiunit second electric telescopic handle 10 all extends to the inside of grip block 5 and the top rigid coupling of butt plate 9, and multiunit second electric telescopic handle 10 extension promotes butt plate 9 and descends, and the bottom of butt plate 9 and the top butt of expanded material for expanded material is by the centre gripping.

All install driving roller 6 at the bottom both ends of grip block 5, the outside movable sleeve that is equipped with first transmission belt 7 at two sets of driving roller 6, one side outside of keeping away from each other of two sets of grip blocks 5 is all installed and is used for driving 6 pivoted driving motor 8 of driving roller, change roller 11 is all installed at the both ends of butt board 9, two sets of width direction settings of all following butt board 9 of changeing roller 11, the outside movable sleeve that is equipped with second transmission belt 24 at two sets of commentaries on classics roller 11, when expanded material is by the centre gripping, expanded material's bottom and the top laminating of first transmission belt 7, expanded material's top and the laminating of second transmission belt 24's bottom, driving motor 8 drive driving roller 6 rotates, driving roller 6 drives first transmission belt 7 and rotates, and then drive expanded material moves along the length direction of grip block 5.

There are two sets of slide rails 20 at box 1's inboard bottom rigid coupling, there is receiver 21 two sets of slide rails 20's top sliding connection, the opening has been seted up at receiver 21's top, and receiver 21 is located mounting panel 2 under, when cutting foaming material, the piece of production drops to box 1's inside from mounting panel 2's both sides, collected by box 1's inside receiver 21, and then avoid the piece to spread all around and pollute the production environment, there is cleaning door 22 at box 1's positive one side externally mounted, open cleaning door 22 and conveniently pull out box 1's the outside with receiver 21 and clear up receiver 21.

The working principle is as follows: when in use, the raw materials for foaming are configured according to the raw material configuration proportion, then the two configured raw materials are put into a reaction kettle, the rotating speed of a stirring paddle in the reaction kettle is adjusted to be 380-420r/min, the raw materials are stirred for 30min to be fully foamed, the foamed raw materials are led into an extruder, the output end of the extruder is fixedly connected with the input end of a mold, the foamed raw materials are extruded and molded from the mold to obtain a foamed material, the extruded and molded foamed material is detected, a cutting device is used for cutting after the detection is qualified to obtain the foamed material with the designed size, when the foamed material is cut, the foamed material is placed at the top of an installation plate 2 and is connected with the power supply of a plurality of groups of first electric telescopic rods 4, the plurality of groups of first electric telescopic rods 4 are synchronously extended to push the clamping plates 5 to approach each other, so that two sides of the foamed material respectively extend to the inner parts of one sides of the two groups of clamping plates 5 which approach each other, then a plurality of groups of second electric telescopic rods 10 extend, the butt plate 9 descends to clamp the foaming material, a power supply of a driving motor 8 is connected, the driving motor 8 drives a driving roller 6 to rotate so as to drive a first transmission belt 7 to rotate, the foaming material is driven to move along the length direction of the clamping plate 5, the number of cutting machines 19 used according to needs is determined, if two groups of cutting machines 19 are used simultaneously, two groups of fourth electric telescopic rods 18 extend synchronously to push the two groups of cutting machines 19 out of the bottom of the mounting sleeve 16, the cutting machines 19 are started, the foaming material moving along the length direction of the clamping plate 5 is cut through the mutual matching of the two groups of third electric telescopic rods 17 and the driving motor 8, the cutting track is adjusted, when only one cutting machine 19 needs to be used, one group of fourth electric telescopic rods 18 contracts, one group of fourth electric telescopic rods 18 extends, through controlling the third electric telescopic handle 17 with the outside rigid coupling of the cutting machine 19 that uses, the convenience is cut the expanded material along 5 length direction movements of grip block, and adjust the cutting orbit, the piece that produces in the cutting process, drop to the inside of box 1 from the both sides of mounting panel 2, receiver 21 in box 1 inside is collected, after the cutting is accomplished, collect the expanded material who cuts out, and mould pressing is carried out to the expanded material that has cut, obtain the finished product of car roof, after the use is accomplished, open clearance door 22 and pull out receiver 21 to the outside of box 1 and clear up receiver 21, when waiting to use next time, repeated above-mentioned operation can.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

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.