CN-224211379-U - Kraft paper bag closing device

Abstract

The utility model discloses a kraft paper bag sealing device which comprises a fixed plate and a movable plate, wherein an electric heating wire installation groove is formed in the fixed plate, a glass fiber plate is arranged in the electric heating wire installation groove, an upper pressing strip accommodating cavity for accommodating an upper pressing strip and a lower pressing strip accommodating cavity for accommodating a lower pressing strip are formed in the electric heating wire installation groove at two sides of the glass fiber plate, an electric heating wire is arranged on the glass fiber plate, one end of the electric heating wire is connected with a spring, the upper pressing strip and the lower pressing strip are arranged on the movable plate, a silicon rubber strip is arranged between the upper pressing strip and the lower pressing strip, the movable plate is connected with a power device, and the movable plate moves towards the fixed plate through the power device. The utility model can lead the heating wire to be always in a tight state through the spring, thereby not only avoiding the bending deformation of the heating wire caused by heat expansion and cold contraction and improving the sealing effect, but also being better applicable to the sealing of the narrow hot melt adhesive tape.

Inventors

• LU YUFENG
• Jin Xiangheng
• CHU JIAN

Assignees

• 常熟市百联自动机械有限公司

Dates

Publication Date

20260508

Application Date

20240611

Claims (4)

1. 1. The kraft paper bag sealing device is characterized by comprising a fixed plate and a movable plate, wherein an electric heating wire installation groove is formed in the fixed plate, a glass fiber plate is arranged in the electric heating wire installation groove, an upper pressing strip accommodating cavity for accommodating an upper pressing strip and a lower pressing strip accommodating cavity for accommodating a lower pressing strip are formed in the electric heating wire installation groove at two sides of the glass fiber plate, an electric heating wire is arranged on the glass fiber plate, one end of the electric heating wire is connected with a spring, the upper pressing strip and the lower pressing strip are arranged on the movable plate, a silicon rubber strip is arranged between the upper pressing strip and the lower pressing strip, the movable plate is connected with a power device, and the movable plate moves towards the fixed plate through the power device.
2. 2. The kraft paper bag sealing device according to claim 1, wherein the other end of the heating wire is connected with another spring.
3. 3. The kraft paper bag sealing device according to claim 1, wherein the power device is a cylinder.
4. 4. The kraft paper bag sealing device according to claim 1, wherein the movable plate is provided with a first guide post on one side of the fixed plate and a second guide post on the other side of the fixed plate.

Description

Kraft paper bag closing device Technical Field The utility model relates to the technical field of logistics package packaging, in particular to a kraft paper bag sealing device for a packaging machine. Background The kraft paper bag has wide application in the packaging field because of the advantages of environmental protection, durability and the like. The common kraft paper bag opening part is provided with hot melt adhesive or hot melt adhesive tape, through heating and pressfitting together the opening both sides of kraft paper bag, and then realize sealing. The sealing device comprises a fixed plate and a movable plate which are fixedly arranged, wherein the movable plate is movably arranged, electric heating elements for heating by hot melting are arranged on the fixed plate and the movable plate, particularly heating wires are arranged on the fixed plate, a high-temperature-resistant soft adhesive tape is arranged on the movable plate, a plastic bag conveyed by the conveying device sags under the action of gravity and is positioned between the fixed plate and the movable plate, when the movable plate moves towards the fixed plate through an air cylinder, the fixed plate and the electric heating elements arranged on the movable plate seal the plastic bag by hot melting, and after sealing is completed, the movable plate is driven by the air cylinder to leave the fixed plate. The sealing device not only can be used for sealing the plastic bags of the continuous rolling bags, but also can be used for sealing the kraft paper bags, but also has poor sealing effect and is not attractive, and the sealing leakage can occur frequently for narrower hot melt adhesive tapes. Disclosure of utility model The utility model aims to provide a kraft paper bag sealing device for a packaging machine, which can be suitable for sealing a narrow hot melt adhesive tape and is attractive and reliable. In order to achieve the technical purpose, the technical scheme of the utility model is as follows: The kraft paper bag sealing device comprises a fixed plate and a movable plate, wherein an electric heating wire installation groove is formed in the fixed plate, a glass fiber plate is arranged in the electric heating wire installation groove, an upper pressing strip accommodating cavity for accommodating an upper pressing strip and a lower pressing strip accommodating cavity for accommodating a lower pressing strip are formed in the electric heating wire installation groove at two sides of the glass fiber plate, an electric heating wire is arranged on the glass fiber plate, one end of the electric heating wire is connected with a spring, the upper pressing strip and the lower pressing strip are arranged on the movable plate, a silica gel strip is arranged between the upper pressing strip and the lower pressing strip, the movable plate is connected with a power device, and the movable plate moves towards the fixed plate through the power device. When the device is used, the kraft paper bag is positioned between the fixed plate and the movable plate, the hot-melt adhesive tape of the kraft paper bag opening is positioned between the electric heating wire and the silica gel strip, the power device drives the movable plate to move towards the fixed plate, the upper pressing strip and the lower pressing strip are matched with the glass fiber plates to clamp the kraft paper bag, and the electric heating wire which heats is matched with the silica gel strip to seal the kraft paper bag. The other end of the heating wire is connected with another spring. I.e. springs are respectively arranged at the two ends of the heating wire. The power device is a cylinder. The movable plate is provided with a first guide post on one side of the fixed plate, and a second guide post on the other side of the fixed plate. The utility model can lead the heating wire to be always in a tight state through the spring, thereby not only avoiding the bending deformation of the heating wire caused by heat expansion and cold contraction and improving the sealing effect, but also being better applicable to the sealing of the narrow hot melt adhesive tape. According to the utility model, the electric heating wire is arranged in the groove, so that accidents caused by the electric heating wire with heat in a non-working state are effectively avoided. Drawings The utility model will be described in further detail with reference to the drawings and the detailed description. FIG. 1 is a schematic diagram of the structure of the present utility model. Fig. 2 is a schematic view of the connection relationship of the fixing plate according to the present utility model. Fig. 3 is a schematic view of a fixing plate structure of the present utility model. Fig. 4 is a schematic diagram of a connection relationship structure of a movable plate according to the present utility model. Detailed Description As shown in fig. 1-4, the kraft paper bag sealing device comprises a fix