Patent Application
20190077567
The present invention relates to an airbag sealing structure and method, and more particularly to an airbag sealing structure and method simple in operation, ideal in sealing effects and lower in production cost.
An airbag is an inflatable cushioning material used to pack items; air is filled in a sealed bag to inflate it to form a cushioning protection structure. Currently, airbags are now the world's most popular packaging materials because the characteristics thereof are conform to current environmental protection and effective warehouse space use appeals, and are more eye-appealing and protective for items compared to traditional packaging materials such that may international famous enterprises all use airbags for the packaging of merchandises. A related document Taiwan Patent No. 1297319, titled “air sealing body having strengthening airtight function”, being an air hermetically sealing body having a strengthening airtight function, which includes two outer films stacked vertically and two inner films between the two outer films an interval line is formed between the upper and lower sides of the two inner films by means of hot sealing, an air filling passage between the upper side and interval line of the two inner films, at least one air chamber between the lower side and interval line of the two outer films, at least one air entrance on a location of the interval line stuck to the two inner films, adapted to be in communication with the air filling passage and air chamber, and a cushioning room between the two outer films and inner films after hot sealing is carried out between the upper side of the two outer films and interval line. Whereby, the air in the cushioning room is used to push the inner films to seal the air filling passage when the air in the air chamber leaks out to the cushioning room, prevent the air from leaking out through the air filling passage.
However, the above air hermetically sealing body having a strengthening airtight function has the following disadvantages to be overcome upon use and manufacturing:
The main object of the present invention is to provide an airbag sealing structure and method, using the designs of the minute passage portions and blocking portion to reduce the product cost thereof, and make airbags more simply.
To achieve the object mentioned above, the present invention proposes an airbag sealing structure, including: an airbag body; at least one opening portion, configured on the airbag body; at least one passage portion, configured inside the airbag body and positioned at one side of the opening portion, a diameter of the passage portion being smaller than 2.9 millimeters; at least one accommodation space far away from the side of the opening portion and configured on the passage portion; and at least one blocking portion, configured inside the accommodation space and positioned at one side of the passage portion. Thereupon, a pneumatic pump nozzle may be inserted in the opening portion of the airbag body to fill air into the airbag body, air will then enter the accommodation space through the passage portion to inflate the accommodation space; when the accommodation space is saturated with air, the airbag body will become tense and taut to press the blocking portion to seal the passage portion; thereafter, the passage portions are hot-sealed within 1.5 seconds after the passage portions are locked so that the airbag body can be filled with air almost completely, allowing the operation to be very simple without needing the check valve structure of the inner films used in conventional airbags so as to reduce the production cost.
Referring to
Referring to
(a) filling air into the opening portion 14 of the airbag body 1;
(b) entering air into the accommodation space 17 to inflate it through the passage portion 16;
(c) sealing the passage portion 16 by locking the inner wall of the accommodation space 17 with the blocking portion 18 to block air from entering the accommodation space 17 when the air in the accommodation space 17 is saturated; and
(d) hot-sealing the passage portion 16 within 1.5 seconds after the passage portion 16 is locked.
In the embodiment, the airbag body 1 is formed by connecting the first substrate 11 with second substrate 12, where the first and second substrates 11, 12 respectively are a hot melt material such as nylon, polyethylene terephthalate (PET), high density polyethylene (PE) or plastics; the first and second substrates 11, 12 are in connection with each other to form the connection portion 13, and the airbag body 1 is formed into an accommodation space 17 for the accommodation of air. Furthermore, the accommodation space 17 has the passage portion 16, which is a micro airway having a diameter below 2.9 millimeters. In addition, the inside of the accommodation space 17 is formed with a blocking portion 18 adapted to block the passage portion 16, which is also formed by means of hot melting, and the air entrance passage 15 is formed between the passage portion 16 and the opening portion 14, allowing only one single opening portion 14 can be in communication with a plurality of passage portions 16. Whereby, a pneumatic pump nozzle 2 is inserted in the opening portion 14 of the airbag body 1 to fill air into the airbag body 1 when the air-filling and sealing of the airbag body 1 are carried out, air will then enter the accommodation space 17 through the passage portion 16 to inflate the accommodation space 17, and the next accommodation space 17 will then be started to fill with air when the pressure in the air entrance passage 15 is equal to the one in the accommodation space 17, which will not stopped until all the accommodation spaces 17 are filled with air. When the accommodation space 17 is saturated with air, the material of the airbag body 1 is pulled and dragged to press the blocking portion 18 to lock the inner wall of the accommodation space 17, allowing the blocking portion 18 to lock the passage portion 17 and the passage portion 16 temporarily. Thereafter, a hot-sealing roll 3 is used to seal the passage portions within 1.5 seconds after the passage portions 16 are locked. Here, the passage portion 16 is very minute in diameter, allowing the blocking portion 18 to lock the passage portion 16 very stably, and the airbag body 1 to be filled with air completely. Therefore, the operation of the present invention is very simple, and the production cost can be saved compared to conventional airbags.
Referring to
Referring to
From the description mentioned above, it is obvious that the present invention has the following advantages; the designs of the minute passage portion 16 and blocking portion 18 allow the production cost thereof to be reduced, and an airbag to be made more simply.
