A liquid reagent filling, sealing and leak detection device for thin-walled plastic bottles

Abstract

The technical solution of this invention is a liquid reagent filling, sealing, and leak detection device for thin-walled plastic bottles. It includes a plastic bottle to be filled, comprising a flexible body and a neck. The wall thickness of the flexible body is 0.4mm-0.5mm, the outer diameter of the flexible body is 15mm-30mm, and the inner diameter of the neck is 0.8mm-1mm. It also includes a filling device, a sealing device, and a leak detection device. The filling device fills the plastic bottle with reagents by first vacuuming and then filling. The sealing device melts and seals the plastic bottle using heat. The leak detection device vacuums the sealed bottle; if the bottle is not properly sealed, the reagent inside will flow out. After being placed in the air, the bottle will be filled with air and then poured into a water tank where it will float on the surface. This invention, using these three simple devices, can realize the reagent filling, sealing, and leak detection process for plastic bottles without errors. Compared to a complete automated production line, it is lower in cost and more efficient.

Description

Technical Field

[0001] The invention relates to a liquid reagent filling, sealing and leakage detection device for a thin-wall plastic bottle. Background Art

[0002] Thin-walled plastic bottles are common bottles on the market. They are used to hold various liquid reagents, such as liquid cosmetics, disinfectant, etc. The structure of the bottle is as follows: Figure 1 As shown, it includes a soft bottle body and a bottleneck. The wall thickness of the bottle body is generally between 0.4mm and 0.5mm, the aperture of the bottle mouth is 0.8mm-1mm, and the outer diameter of the soft bottle body is 15mm-30mm. The whole is blow-molded. The production efficiency of the bottle is very high and the quality is reliable. However, when filling reagents, an entire automated filling production line is usually used to fill each bottle with reagents. In addition to the subsequent automatic sealing equipment and automatic leak detection equipment, the cost of a production line is at least millions, and the parts on the production line are complicated and diverse. Subsequent failures require the entire line to be shut down for maintenance, which leads to high production costs. Therefore, the applicant has been committed to developing a low-cost filling, sealing and leak detection equipment that can ensure high production efficiency. Summary of the invention

[0003] In view of the above problems, the present invention aims to provide a thin-wall plastic bottle liquid reagent filling, sealing and leak detection equipment, which has low manufacturing cost and ensures high production efficiency.

[0004] The technical solution of the present invention is a thin-wall plastic bottle liquid reagent filling, sealing and leak detection equipment, comprising a plastic bottle to be filled, the plastic bottle comprising a soft bottle body and a bottleneck, the wall thickness of the soft bottle body is 0.4mm-0.5mm, the outer diameter of the soft bottle body is 15mm-30mm, and the inner hole diameter of the bottleneck is 0.8mm-1mm;

[0005] It also includes filling equipment, sealing equipment and leak detection equipment;

[0006] The filling equipment comprises a box body and a box cover, wherein a series of trays neatly arranged vertically are arranged in the box body, and a series of the above-mentioned plastic bottles uniformly arranged in the horizontal and vertical directions are arranged on the trays, a water pipe is connected to the bottom of the box body, a valve is arranged in the water pipe, and the other end of the water pipe is connected to a water pump, and the water pump is located in the medicine pool, and the interior of the box body is in a sealed state when the box cover is closed, and a first vacuum pumping tube is connected to the top of the box cover, and the other end of the first vacuum pumping tube is connected to the top of the liquid collection bottle, and the top of the liquid collection bottle is connected to a second vacuum pumping tube, and the second vacuum pumping tube is connected to a vacuum pump, and the box body is vacuumed by the vacuum pump so that all the plastic bottles are in a shriveled state, and when the set vacuum degree is reached in the box body, the water pump is started to inject medicine through the bottom water pipe to immerse all the plastic bottles therein, and the plastic bottles absorb the medicine and return to a full state;

[0007] The sealing device comprises a frame with an external power cord, a workbench for positioning and placing a tray in a flat position is arranged in the middle of the frame, a heating plate is arranged above the workbench, a high-temperature adhesive tape is connected to the bottom of the heating plate to prevent plastic from sticking, the top of the heating plate is controlled to rise and fall by a connected lifting cylinder, a control panel is arranged on the top of the frame, the heating plate is connected to the control panel through a line for electric heating, the length and width of the heating plate are larger than the length and width of the tray, and the heating plate descends to melt and seal the tops of all the plastic bottles on the tray;

[0008] The leak detection equipment includes a sealed container and a sealed cover. The sealed container or the sealed cover is connected to a vacuum pump through a pipeline. The sealed plastic bottle is placed in the sealed container. After the sealed cover is closed, the vacuum pump is started to evacuate the interior. The reagent in the loosely sealed plastic bottle will be sucked out and become shrunken.

[0009] Preferably, a vacuum detection gauge for detecting the internal vacuum degree is provided on the box cover of the filling equipment.

[0010] Preferably, a vacuum detection gauge for detecting the internal vacuum degree is provided on the sealing cover or the sealed container of the leak detection device.

[0011] Preferably, the leak detection equipment also includes a recovery pool, and the above-mentioned plastic bottles are all poured into the recovery pool after being vacuumed. Unsealed plastic bottles float on the water surface because the materials inside are evacuated and air enters the inside, while well-sealed plastic bottles sink to the bottom of the water.

[0012] Preferably, there are two liquid collecting bottles, and the tops of the front and rear bottles are connected in series through a pipeline, the former is connected to the box cover through the other end of the first vacuum pipe, and the latter is connected to the vacuum pump through the second vacuum pipe.

[0013] Preferably, the plastic bottle is made of PE.

[0014] The present invention can realize the reagent filling, sealing and leak detection processes of plastic bottles through the above three simple devices without any mistakes. Compared with a complete set of automated production lines, the equipment manufacturing cost is significantly reduced. The work that originally took a production line of millions or even tens of millions to complete can be completed with an equipment cost of tens of thousands, while also ensuring high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the plastic bottle of the present invention;

[0016] Figure 2 It is a structural schematic diagram of the filling equipment in the present invention;

[0017] Figure 3It is a structural schematic diagram of the tray in the present invention;

[0018] Figure 4 This is a schematic diagram of the structure of the tray after loading plastic bottles in the present invention;

[0019] Figure 5 It is a structural schematic diagram of the sealing device in the present invention;

[0020] Figure 6 It is a structural schematic diagram of the leakage detection device in the present invention;

[0021] Among them: 1—plastic bottle; 11—soft bottle body; 12—neck; 3—filling equipment; 31—box body; 32—box cover; 33—water pipe; 34—valve; 36—first vacuum tube; 37—liquid collection bottle; 38—second vacuum tube; 39—vacuum pump; 4—sealing equipment; 41—rack; 42—workbench; 43—heating plate; 5—leak detection equipment; 51—sealed container; 52—sealing cover; 6—tray. DETAILED DESCRIPTION

[0022] The invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] like Figures 1 to 6 As shown, the present invention provides a thin-wall plastic bottle liquid reagent filling, sealing and leak detection equipment, comprising a plastic bottle 1 to be filled, the plastic bottle 1 comprising a soft bottle body 11 and a bottleneck 12, the wall thickness of the soft bottle body 11 is 0.4mm-0.5mm, the outer diameter of the soft bottle body 11 is 15mm-30mm, and the inner hole diameter of the bottleneck 12 is 0.8mm-1mm;

[0024] It also includes filling equipment 3, sealing equipment 4 and leak detection equipment 5;

[0025] The filling equipment 3 comprises a box body 31 and a box cover 32. A series of trays 6 neatly arranged vertically are arranged in the box body 31. A series of the above-mentioned plastic bottles 1 uniformly arranged in the horizontal and vertical directions are arranged on the trays 6. A water pipe 33 is connected to the bottom of the box body 31. A valve 34 is arranged in the water pipe 33. The other end of the water pipe 33 is connected to a water pump, which is located in the medicine pool. When the box cover 32 is closed, the inside of the box body 31 is in a sealed state. A first vacuum pipe 36 is connected to the top of the box cover 32. The other end of the first vacuum pipe 36 is connected to the top of a liquid collection bottle 37. The top of the liquid collection bottle 37 is connected to a second vacuum pipe 38. The second vacuum pipe 38 is connected to a vacuum pump 39. The box body 31 is vacuumed by the vacuum pump 39 so that all the plastic bottles 1 are in a shriveled state. When the box body 31 reaches a set vacuum degree, the water pump is started to inject medicine through the bottom water pipe 33 to immerse all the plastic bottles 1 therein, and the plastic bottles 1 absorb the medicine and return to a full state.

[0026] The sealing device 4 includes a frame 41 with an external power cord, a workbench 42 for positioning and placing the tray 6 in a horizontal position is arranged in the middle of the frame 41, a heating plate 43 is arranged above the workbench 42, the bottom surface of the heating plate 43 is connected with a high-temperature adhesive tape to prevent plastic adhesion, the top of the heating plate 43 is controlled to rise and fall by a connected lifting cylinder, a control panel is arranged on the top of the frame 41, and the heating plate 43 is connected to the control panel through a line for electric heating, the length and width of the heating plate 43 are larger than the length and width of the tray, and the heating plate 43 descends to melt and seal the tops of all the plastic bottles 1 on the tray 6;

[0027] The leak detection device 5 includes a sealed container 51 and a sealed cover 52. The sealed container 51 or the sealed cover 52 is connected to a vacuum pump through a pipeline. The sealed plastic bottle 1 is placed in the sealed container 51. After the sealed cover 52 is covered, the vacuum pump is started to evacuate the interior. The reagent in the loosely sealed plastic bottle 1 will be sucked out and become shrunken.

[0028] In the above solution, a vacuum detection gauge for detecting the internal vacuum degree is provided on the box cover 32 of the filling device 3 .

[0029] In the above solution, a vacuum detection gauge for detecting the internal vacuum degree is provided on the sealing cover 52 or the sealing container 51 of the leak detection device 5 .

[0030] In addition, the leak detection equipment 5 also includes a recovery pool. The above-mentioned plastic bottles 1 are all poured into the recovery pool after being vacuumed. The unsealed plastic bottles 1 float on the water surface because the materials inside are evacuated and air enters the inside, while the well-sealed plastic bottles 1 sink to the bottom of the water.

[0031] Specifically, there are two liquid collecting bottles 37 , and the tops of the front and rear bottles are connected in series through a pipeline. The former is connected to the box cover 32 through the other end of the first vacuum pipe 36 , and the latter is connected to the vacuum pump 39 through the second vacuum pipe 38 .

[0032] Furthermore, the plastic bottle 1 is made of PE material.

[0033] The workflow of the present invention is as follows:

[0034] First, workers place and load the plastic bottles 1 onto the pallet 6. The side walls of the pallet 6 extend upward to form guardrails. After all the plastic bottles 1 are loaded, they fit the side walls. In addition, the plastic bottles 1 themselves can be slightly deformed, so they have a self-positioning and fastening effect after they are all installed, and they will not fall off when placed sideways. In fact, the pallet 6 used has different length and width dimensions. It can hold 20 plastic bottles 1 in the length direction and 13 plastic bottles 1 in the width direction. One pallet 6 can hold 260 plastic bottles 1. Of course, the size of the pallet 6 can be changed, and at least more than 200 plastic bottles 1 can be filled at a time. In addition, in practice, the box 31 of the filling equipment 3 can be vertically inserted into 28 trays, and 7280 plastic bottles 1 can be filled at a time. Of course, the size of the box 31 can be changed as needed. In general, a filling can be at least for several thousand plastic bottles or tens of thousands of plastic bottles. After all the trays 6 are inserted vertically into place, cover the box cover 32, close the valve 34 in the water pipe 33, control the vacuum pump 39 to evacuate, and read the internal vacuum degree according to the vacuum detection meter. At this time, a large amount of air inside all the plastic bottles 1 is extracted, and the plastic bottles 1 become shriveled. When the vacuum degree reaches the set value, turn off the vacuum pump 39, open the valve 34, start the water pump to inject the medicine through the bottom water pipe 33 to immerse all the plastic bottles 1. All the plastic bottles 1 absorb the medicine and return to a full state. After a period of time, open the box cover 32, take out the tray 6, and each plastic bottle 1 in the tray 6 is filled with the reagent. This filling time usually takes 7-8 minutes to complete.

[0035] Then, the worker moves the tray 6 to the sealing equipment 4, places the tray steadily on the workbench 42, controls the lifting cylinder to drive the heating plate 43 to descend, and the high-temperature tape at the bottom of the heating plate 43 contacts the top of the plastic bottle 1 and melts the bottleneck 12 of the plastic bottle 1. The temperature of the heating plate 43 and the high-temperature tape is about 320°C, and the contact time between the two is 3 seconds. The melted plastic raw material blocks the inner hole. After the sealing is completed, the lifting cylinder is reset, and the worker takes out the tray 6. The entire sealing time is generally about 30 seconds.

[0036] Finally, the worker puts multiple trays 6 into the sealed container 51 of the leak detection equipment 5 and performs a vacuum operation. The liquid inside the plastic bottles 1 that have not been successfully sealed will flow out, and the plastic bottles 1 will become shriveled. After the trays 6 are taken out, the unsealed plastic bottles 1 will regain their full state because of the air entering the inside. All the above-mentioned plastic bottles 1 are poured into a recycling pool. The unsealed plastic bottles 1 float on the water surface, while the well-sealed plastic bottles 1 sink to the bottom of the water. Finally, the plastic bottles 1 floating on the water surface are removed, and the leak detection work is completed. The whole work lasts about 5 minutes.

[0037] Finally, the plastic bottles 1 at the bottom of the recycling pool are collected and are qualified products. The plastic bottles 1 at the bottom can be salvaged directly during the collection process, or the plastic bottles 1 can be salvaged after the water in the recycling pool is drained.

[0038] The filling method of the present invention is completely different from the traditional liquid filling, and has broken through the understanding of filling by those skilled in the art. As for the filling efficiency on the automated production line, the present invention can fill 7280 plastic bottles 1 in 7-8 minutes, and can reach an average filling speed of 1000 bottles per minute, which is far higher than the filling speed on the automated production line. In addition, the manufacturing cost of the filling equipment can be controlled within several thousand yuan, and the cost can be greatly reduced. For those skilled in the art, this is a significant improvement.

[0039] Similarly, leak detection equipment and sealing equipment also use simple structures to achieve corresponding functions, greatly reducing production costs while ensuring high production efficiency.

[0040] The above description is only a preferred embodiment of the present invention and does not impose any form of limitation on the invention. Any simple modification, equivalent change or modification made to the above embodiments based on the technical principle of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A thin-wall plastic bottle liquid reagent filling, sealing and leak detection device, comprising a plastic bottle (1) to be filled, the plastic bottle (1) comprising a soft bottle body (11) and a bottleneck (12), the wall thickness of the soft bottle body (11) being 0.4 mm-0.5 mm, the outer diameter of the soft bottle body (11) being 15 mm-30 mm, and the inner hole diameter of the bottleneck (12) being 0.8 mm-1 mm; It also includes filling equipment (3), sealing equipment (4) and leak detection equipment (5); The filling device (3) comprises a box body (31) and a box cover (32). A series of trays (6) neatly arranged vertically are arranged in the box body (31). A series of the above-mentioned plastic bottles (1) are arranged evenly in the horizontal and vertical directions on the trays (6). A water pipe (33) is connected to the bottom of the box body (31). A valve (34) is arranged in the water pipe (33). The other end of the water pipe (33) is connected to a water pump, which is located in the medicine pool. When the box cover (32) is closed, the interior of the box body (31) is in a sealed state. The box cover (32) is 2) A first vacuum tube (36) is connected to the top, the other end of the first vacuum tube (36) is connected to the top of a liquid collection bottle (37), the top of the liquid collection bottle (37) is connected to a second vacuum tube (38), the second vacuum tube (38) is connected to a vacuum pump (39), the vacuum pump (39) is used to evacuate the box (31) so that all the plastic bottles (1) are in a shrunken state, and when the box (31) reaches a set vacuum degree, the water pump is started to inject the agent through the bottom water pipe (33) to immerse all the plastic bottles (1) therein. The plastic bottle (1) absorbs the medicine and returns to a full state; The sealing device (4) comprises a frame (41) connected to an external power cord, a workbench (42) for positioning and placing the tray (6) in a horizontal position is arranged in the middle of the frame (41), a heating plate (43) is arranged above the workbench (42), a high-temperature adhesive tape for preventing plastic from sticking is connected to the bottom surface of the heating plate (43), the top of the heating plate (43) is controlled to rise and fall by a connected lifting cylinder, a control panel is arranged on the top of the frame (41), the heating plate (43) is connected to the control panel through a line for electric heating, the length and width of the heating plate (43) are larger than the length and width of the tray, and the heating plate (43) descends to melt and seal the tops of all the plastic bottles (1) on the tray (6); The leak detection device (5) comprises a sealed container (51) and a sealed cover (52). The sealed container (51) or the sealed cover (52) is connected to a vacuum pump via a pipeline. The sealed plastic bottle (1) is placed in the sealed container (51). After the sealed cover (52) is closed, the vacuum pump is started to evacuate the inside of the sealed plastic bottle (1). The reagent in the loosely sealed plastic bottle (1) will be sucked out and become shrunken.

2. The thin-wall plastic bottle liquid reagent filling, sealing and leak detection equipment according to claim 1, characterized in that: The box cover (32) of the filling device (3) is provided with a vacuum detection gauge for detecting the internal vacuum degree.

3. The thin-wall plastic bottle liquid reagent filling, sealing and leak detection equipment according to claim 1, characterized in that: The sealing cover (52) or the sealing container (51) of the leak detection device (5) is provided with a vacuum detection gauge for detecting the internal vacuum degree.

4. The thin-wall plastic bottle liquid reagent filling, sealing and leak detection equipment according to claim 1, characterized in that: The leak detection device (5) further comprises a recovery pool. After being evacuated, the plastic bottles (1) are all poured into the recovery pool. Plastic bottles (1) that are not well sealed float on the water surface because the materials inside are evacuated and air enters the inside, while plastic bottles (1) that are well sealed sink to the bottom of the water.

5. The thin-wall plastic bottle liquid reagent filling, sealing and leak detection equipment according to claim 1, characterized in that: There are two liquid collecting bottles (37), and the tops of the front and rear bottles are connected in series via a pipeline. The former is connected to the box cover (32) via the other end of the first vacuum pipe (36), and the latter is connected to the vacuum pump (39) via the second vacuum pipe (38).

6. The thin-wall plastic bottle liquid reagent filling, sealing and leak detection equipment according to claim 1, characterized in that: The plastic bottle (1) is made of PE material.

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