CN104568347B - Testing device and testing method for testing leakage of small cigarette case - Google Patents

Abstract

The invention relates to a device and method for nondestructive testing to a packaging body, and particularly relates to a testing device and testing method for testing the leakage of a small cigarette case. The testing device for testing the leakage of the small cigarette case comprises a testing housing, a compressed air device, a piston device and a three-way pipeline, wherein each of the testing housing, the compressed air device and the piston device is arranged at one end of the three-way pipeline, a first valve and a second valve are respectively arranged at the pipeline at one end connected with the piston device and at the pipeline at one end connected with the compressed air device, and a pressure sensor is arranged at the pipeline at one end connected with the testing housing. Due to the adoption of the technical scheme provided by the invention, compressed air is used for gas-filling and boosting, and the leakage rate can be determined according to the rate of displacement difference after balance. The device provided by the invention has a simple structure, is convenient to implement, and can be used for quickly and accurately judging whether leakage exists in the small cigarette case under a condition of not destroying a sample.

Description

A kind of test device and method of testing of test box cigarette small packaging leakage

Technical field

The present invention relates to a kind of apparatus and method of nondestructive testing package body, more particularly to test box cigarette small packaging The test device and method of testing of leakage.

Background technology

Sealing is very big to the impact for packing product quality, and sealing is bad to be affected, and made moist, salt fog, and mycete etc. in a large number should For curing the fields such as material equipment, medicine, food.In the packaging process of product, due to the impact of various factors, can in sealing Can produce Lou envelope, pressure to wear or because of crack, the micropore of material presence itself, and form the aperture of inside and outside connection, these all can be right Pack content has a negative impact.The particularly product packaging such as food, medicine, daily use chemicals, sealing will directly affect product Quality.If such as vacuum, gas flush packaging poor sealing, even if employing high barrier material also can directly shorten the shelf of product Phase, certain economic loss is caused to enterprise.It is enterprise to pack product to carry out sealing propertytest from for this aspect Image, a feasible road for obtaining long-term economic benefit.

Sealing is good again, can also there is certain leakage, and the packaging of positive confinement is not present, and is particularly similar to the capsule of Medicated cigarette Packaging, is that, using the heat-sealing of BOPP film, sealing is relevant with the temperature-time material of heat-sealing, and testing result sealing is not to manage very much Think.

The method for conducting leak test for adopting at present includes following several：

1. visual method, visual inspection be exactly direct visual perception whether there is because mechanical damage, it is poorly sealed the mistake that causes is sealed. Mainly check that those have the packaging for substantially losing envelope.

2. tallcum powder method Pulvis Talci inspection suspects on packing and loses where envelope, sprinkles Pulvis Talci, then squeezed with handss Briquetting is filled, if the air of the packaged interior discharge of Pulvis Talci blows, illustrates that packaging has lost envelope.

3. sealing property detector method, the detection method of sealing property detector is that a gas injection is played on packing is little Hole, then makes its pressure up to 1.2 atm highers by gas injection aperture to injecting compressed air in sealed bundle vanning, closes note Air cock, the pressure change observed in seal box, Jing after 5 seconds kinds, pressure is constant, illustrates favorable sealing property, otherwise loses envelope. At present, these three methods have applicable one side, there is also obvious defect.Visual inspection, it is simple and convenient, but It is only applicable to significantly lose envelope.Pulvis Talci checks that affected larger by package shape, anthropic factor, its reliability is not high.Inspection Survey instrument detection, although reliability is high, but while detection, pack destroyed, from punching to resealing, working link is numerous It is many, it is unfavorable for carrying out the work, to the packaging that testing result is good seal, detection process will cause many side effect.

4. discharge method, discharge method can be used to measuring cigarette case packaging, carton package and other are thin with polyethylene or polypropylene Film wrapped up it is hybrid packed on packaging film sealing.But the method is not suitable for using shrink wrapping, cellophane The packing box of packaging or foil packages.May not conformed to because of packaging quality using the effectiveness of discharge method testing package sealing There are loose film, wrinkle film or foreign body on lattice, such as packaging film and reduce.

The content of the invention

In order to solve above-mentioned technical problem, first purpose of the present invention is to provide a kind of test box cigarette small packaging and lets out The test device of leakage, the apparatus structure is simple, easy to implement, under conditions of sample is not destroyed, quick and precisely judges that Medicated cigarette is little Whether box packaging leaks.Second object of the present invention is to provide a kind of method of testing of test box cigarette small packaging leakage, should Method is quick and precisely judged whether box cigarette small packaging leaks using above-mentioned device.

In order to realize above-mentioned first purpose, following technical scheme is present invention employs：

A kind of test device of test box cigarette small packaging leakage, the device includes test cavity, blowing plant, work Plug device and triplate line, described test cavity, blowing plant and piston apparatus distinguish connect setting in triplate line One end, and respectively with piston apparatus, one end pipeline of blowing plant on be provided with the first valve and the second valve, Pressure transducer is provided with one end pipeline of test cavity.

Preferably, described test cavity is metal, volume is close with the volume of cigarette package body.

In order to realize above-mentioned second purpose, following technical scheme is present invention employs：

A kind of method of testing of test box cigarette small packaging leakage, the method adopts above-mentioned device, including following step Suddenly：

1）Test sample is not put, closure test cavity first by the plate washer of piston, moves to Far Left, closes the first valve V₁ With the second valve V₂；

2）Open the second valve V₂, allowing compressed air in cavity, air pressure reaches P₁, simultaneously close off the second valve V₂, beat Open the first valve V₁, after the plate washer movement of piston, write down mobile displacement S, blowdown pressure letdown；

3）Standard testing body is put in test chamber body, volume and the tested sample condition of standard testing body are worked as, it is same on Operation is stated, after balance, mobile displacement S is measured₀, it is completed, blowdown pressure letdown；

4）Tested sample is put in test cavity, equally by aforesaid operations, mobile displacement S is measured₁, opening first Valve V₁When, start to clock, after reaching balance, the equilibration time for measuring is t, is completed, blowdown pressure letdown；

5）According to time t, tested thing determines whether gross leak, under normal circumstances, t>0.5s, if t is less than 0.5 second, Illustrate gross leak；According to below equation：

Leakage rate size is judged according to the size of A；80% micro-leakage is more than to hard box Medicated cigarette A, it is qualified to be judged to；To soft It is qualified that box Medicated cigarette A is judged to more than 75%.

The present invention as a result of above-mentioned technical scheme, using compressed air plenum, according to the displacement after balance Poor ratio, judges leakage rate size, and the apparatus structure of the present invention is simple, easy to implement, under conditions of sample is not destroyed, soon It is fast accurately to judge whether box cigarette small packaging leaks.

Description of the drawings

Fig. 1 is the structural representation of the present invention.

Specific embodiment

The specific embodiment of the present invention is made a detailed explanation below in conjunction with the accompanying drawings.

A kind of test device of test box cigarette small packaging leakage as shown in Figure 1, the device includes test cavity 1, pressure Contracting air assembly 2, piston apparatus 3 and triplate line 4, test cavity 1 is metal and with sealing ring 5, volume and Medicated cigarette The volume of package body is close.Described test cavity 1, blowing plant 2 and piston apparatus 3 distinguish connect setting in tee T The one end on road 4, and respectively with piston apparatus 3, one end pipeline of blowing plant 2 on be provided with the first valve V₁With second Valve V₂, with test cavity 1 one end pipeline on be provided with pressure transducer P.

A kind of method of testing of test box cigarette small packaging leakage, the method adopts above-mentioned device, including following step Suddenly：

1）Test sample is not put, closure test cavity 1 first by the plate washer of piston, moves to Far Left, closes the first valve V₁ With the second valve V₂；

2）Open the second valve V₂, allowing compressed air in cavity, air pressure reaches P₁, simultaneously close off the second valve V₂, beat Open the first valve V₁, after the plate washer movement of piston, write down mobile displacement S, blowdown pressure letdown；

3）Standard testing body is put in test cavity 1, the volume of standard testing body is worked as with tested sample condition, it is same on Operation is stated, after balance, mobile displacement S is measured₀, it is completed, blowdown pressure letdown；

4）Tested sample is put in test cavity 1, equally by aforesaid operations, mobile displacement S is measured₁, opening the One valve V₁When, start to clock, after reaching balance, the equilibration time for measuring is t, is completed, blowdown pressure letdown；

5）According to time t, tested thing determines whether gross leak, under normal circumstances, t>0.5s, if t is less than 0.5 second, Illustrate gross leak；According to below equation：

Leakage rate size is judged according to the size of A.

Adopt and with the aforedescribed process detection data is as follows to be detected to box cigarette small packaging：

First compressed air is filled with into cavity, it is 5KPa to measure pressure, after emptying, measures S for 4.96 cm, standard testing body In test cavity 1, S is measured₀For 0.03 cm, this value changes according to manifold volume size.

Tested sample is put in test cavity 1, equally by aforesaid operations, for Medicated cigarette rigid pack, displacement S is measured₁ For 0.5 cm；For the soft box packaging of Medicated cigarette, displacement S is measured₁For 0.6cm；For gross leak sample, displacement S is measured₁For 1.2cm； According to repeatedly measurement, show that it is qualified to be judged to for Medicated cigarette rigid pack A is more than 85%；Box packaging A soft for Medicated cigarette is more than 80% It is qualified to be judged to, counts in stating sample by formula and obtains A（Firmly）=90.4%, A（It is soft）=88.4% is certified products.

Claims (2)

1. the method for testing that a kind of test box cigarette small packaging is leaked, it is characterised in that the method is included with sealing using device Enclose test cavity (1), blowing plant (2), piston apparatus (3) and the triplate line (4) of (5), described test cavity (1), blowing plant (2) and piston apparatus (3) difference connect setting are in one end of triplate line (4), and are filling with piston The first valve V is provided with one end pipeline for putting (3) connection₁, arrange on one end pipeline being connected with blowing plant (2) There is the second valve V₂, on one end pipeline being connected with test cavity (1) pressure gauge P is provided with；The method includes following step Suddenly：

1) tested sample is not put, the plate washer of piston is first moved to Far Left, closes the first valve V by closure test cavity (1)₁With Second valve V₂；

2) the second valve V is opened₂, allowing compressed air in cavity, air pressure reaches P₁, simultaneously close off the second valve V₂, open the One valve V₁, after the plate washer movement of piston, write down mobile displacement S, blowdown pressure letdown；

3) standard testing body is put in test cavity (1), volume and the tested sample condition of standard testing body are worked as, same above-mentioned Operation, after balance, measures mobile displacement S₀, it is completed, blowdown pressure letdown；

4) tested sample is put in test cavity (1), equally by aforesaid operations, measure mobile displacement S₁, opening the first valve Door V₁When, start to clock, after reaching balance, the equilibration time for measuring is t, is completed, blowdown pressure letdown；

5) according to time t, tested sample whether gross leak, under normal circumstances, t are judged>0.5s, if t is less than 0.5 second, says Bright gross leak；A is calculated according to below equation：

$A=\frac{{\mathrm{\ΔS}}_1}{{\mathrm{\ΔS}}_0}\×100\%=\frac{S-S_1}{S-S_0}\×100\%$

Leakage rate size is judged according to the size of A；80% micro-leakage is more than to hard box Medicated cigarette A, it is qualified to be judged to；Soft box is rolled up It is qualified that cigarette A is judged to more than 75%.

2. method according to claim 1, it is characterised in that：Test cavity (1) is metal, volume and box cigarette small The volume of packaging is close.