CN204269323U - A kind of proving installation tested box cigarette small packaging and leak - Google Patents

Abstract

The utility model relates to a test device for testing the leakage of cigarette small box packaging. The device comprises a test cavity of a sealing ring, a compressed air device, a piston device and a tee pipeline. The devices are respectively connected to one end of the three-way pipeline, and are respectively provided with a first valve and a second valve on one end of the pipeline with the piston device and the compressed air device, and a pressure sensor is provided on the one end of the pipeline with the test chamber. Because the utility model adopts the above-mentioned technical scheme, the compressed air is used to inflate and pressurize, and the leakage amount is judged according to the ratio of the balanced displacement difference. The device of the utility model has the advantages of simple structure and convenient implementation, and can quickly and accurately judge whether the cigarette small box package leaks under the condition of not destroying the sample.

Description

A test device for testing leakage of small cigarette packs

technical field

The utility model relates to a device for non-destructive testing of packaging bodies, in particular to a testing device for testing the leakage of cigarette small box packaging.

Background technique

Sealing has a great influence on the quality of packaging products. If the seal is not good, it will be affected by moisture, salt spray, mold, etc. It is widely used in medical equipment, medicine, food and other fields. In the packaging process of the product, due to the influence of various factors, there may be leakage, pressure penetration or small holes connecting the inside and outside due to cracks and micropores in the material itself, which will affect the packaging content. substances have adverse effects. Especially in food, medicine, daily chemical and other product packaging, the airtightness will directly affect the quality of the product. For example, if the airtightness of vacuum and air-filled packaging is not good, even if high-barrier materials are used, the shelf life of the product will be directly shortened, causing certain economic losses to the enterprise. From this perspective, airtight testing of packaging products is a feasible way to enhance corporate image and obtain long-term economic benefits.

No matter how good the seal is, there will be some leakage. Absolutely airtight packaging does not exist, especially the small box packaging similar to cigarettes, which is heat-sealed with BOPP film. The airtightness is related to the temperature and time of the heat-sealing material. Not ideal.

Currently used leak detection methods include the following:

1. Visual method, visual inspection is to directly observe with the naked eye whether there is a loss of seal due to mechanical damage or poor sealing. It is mainly to check those packages that are obviously broken.

2. Talc powder method Talcum powder inspection Sprinkle talcum powder on the place where there is a suspected loss of seal on the sealed package, and then squeeze the package by hand. If the talcum powder is blown by the air discharged from the package, it means that the package has lost its seal.

3. Sealing performance tester method, the test method of the sealing performance tester is to make a small hole for air injection on the sealed package, and then inject compressed air into the sealed packing box through the small hole for air injection to make the pressure reach about 1.2 atmospheres. Turn off the gas injection switch and observe the pressure change in the sealed box. After 5 seconds, if the pressure remains unchanged, it means that the sealing performance is good, otherwise the seal will be broken. Judging from the current situation, these three methods are applicable, but also have obvious defects. Visual inspection is simple and convenient, but only for obvious leaks. Talc powder inspection is greatly affected by packaging shape and human factors, and its reliability is not high. Although the reliability of the detector is high, the sealed package is damaged at the same time as the test. From punching to resealing, there are many working links, which is not conducive to work. The test result is a well-sealed package, and the test process will cause many side effects .

4. Flow method, flow method can be used to measure the tightness of packaging film on cigarette box packaging, carton packaging and other mixed packaging wrapped with polyethylene or polypropylene film. However, this method is not suitable for shrink-wrapped, cellophane-wrapped or foil-wrapped boxes. The effectiveness of using the flow method to test package tightness may be compromised by substandard package quality, such as loose film, wrinkled film, or foreign material on the packaging film.

Contents of the invention

In order to solve the above-mentioned technical problems, the first object of this utility model is to provide a test device for testing the leakage of small cigarette packs. Whether the small box packaging is leaking.

In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

A test device for testing the leakage of small cigarette packs, the device includes a test cavity for a sealing ring, a compressed air device, a piston device and a three-way pipeline, and the test cavity, compressed air device and piston device are respectively connected and arranged At one end of the three-way pipeline, a first valve and a second valve are respectively arranged on the pipeline with the piston device and the compressed air device, and a pressure sensor is arranged on the pipeline with the test cavity.

Preferably, the test chamber is made of metal, and its volume is close to that of the cigarette package.

Because the utility model adopts the above-mentioned technical scheme, the compressed air is used to inflate and pressurize, and the leakage amount is judged according to the ratio of the balanced displacement difference. The device of the utility model has the advantages of simple structure and convenient implementation, and can quickly and accurately judge whether the cigarette small box package leaks under the condition of not destroying the sample.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, specific embodiment of the present utility model is described in detail.

The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, a test device for testing cigarette packet leakage, the device includes a test cavity 1, a compressed air device 2, a piston device 3 and a three-way pipeline 4, and the test cavity 1 is made of metal and With a sealing ring 5, the volume is similar to that of the cigarette package. The test cavity 1, the compressed air device 2 and the piston device 3 are respectively connected to one end of the three-way pipeline 4, and a first valve V is arranged on the end pipeline with the piston device 3 and the compressed air device 2 respectively. ₁ and the second valve V ₂ , a pressure sensor P is provided on the pipeline connected to the test chamber 1 at one end.

A test method for testing the leakage of cigarette small packs, the method adopts the above-mentioned device, comprising the following steps:

1) Close the test chamber 1 without placing the test sample, first move the baffle plate of the piston to the far left, and close the first valve V ₁ and the second valve V ₂ ;

2) Open the second valve V ₂ to let the compressed air enter the cavity, and the air pressure reaches P ₁ . At the same time, close the second valve V ₂ and open the first valve V ₁ . After the baffle plate of the piston moves, record the displacement S, vent pressure;

3) Put the standard test body in the test chamber 1. The volume of the standard test body is equivalent to the sample to be tested. The same operation as above, after balancing, measure the displacement S ₀ of the movement. After the test is completed, vent the pressure;

4) Put the sample to be tested in the test chamber 1, and follow the above operation to measure the displacement S ₁ of the movement. When the first valve V ₁ is opened, start timing. After reaching the balance, the measured balance time is t , after the test, vent the pressure;

5) According to the time t, determine whether there is a large leakage of the tested object. Under normal circumstances, t>0.5s, if t is less than 0.5 seconds, it means a large leakage; according to the following formula:

Determine the size of the leakage according to the size of A.

The above-mentioned method is used to detect the cigarette small box packaging, and the detection data are as follows:

First fill the chamber with compressed air, and the measured pressure is 5KPa. After venting, the measured S is 4.96 cm. The standard test body is in the test chamber 1, and the measured S ₀ is 0.03 cm. This value is based on the volume of the pipeline. And change.

Put the sample to be tested in the test chamber 1, and operate as above. For cigarette hard box packaging, the measured displacement S ₁ is 0.5 cm; for cigarette soft box packaging, the measured displacement S ₁ is 0.6 cm; for large leakage samples , the measured displacement S ₁ is 1.2cm; according to multiple measurements, it is determined that the cigarette hard box packaging A is greater than 85%, and it is judged as qualified; the cigarette soft box packaging A is greater than 80%, and it is judged as qualified, and the above samples are calculated according to the formula. A (hard) = 90.4%, A (soft) = 88.4% are qualified products.

Claims (2)

1. the proving installation tested box cigarette small packaging and leak, it is characterized in that: this device comprises with the test cavity (1) of O-ring seal (5), blowing plant (2), piston apparatus (3) and triplate line (4), described test cavity (1), blowing plant (2) are connected with piston apparatus (3) one end being arranged on triplate line (4) respectively, and respectively with one end pipeline of piston apparatus (3), blowing plant (2) on be provided with the first valve V ₁with the second valve V ₂, with test cavity (1) one end pipeline on be provided with pressure transducer.

2. a kind of proving installation tested box cigarette small packaging and leak according to claim 1, is characterized in that: test cavity (1) is metal, and the volume of volume and cigarette package body is close.