Paper roll packaging machine and method for preventing packaging film pattern dislocation

Abstract

The invention discloses a paper roll packaging machine capable of preventing packaging film pattern dislocation. The paper roll packaging machine comprises a clamping and pressing part and an edge closing plate, wherein the clamping and pressing part is used for clamping and hot melting the opening end of a packaging film to form the sealing end of the packaging film, the edge closing plate is used for bending and converging the packaging film at the end of a paper roll to be attached to the end face of the paper roll, and the clamping and pressing part is provided with a vacant part which has no hot melting effect on the packaging film. The invention further discloses a method for preventing the packaging film pattern dislocation of the paper roll packaging machine, in the process that the packaging film is bent, converged and attached to the end face of a paper roll through the edge closing plate, air wrapped in the packaging film is exhausted through the air leakage opening, and in the process that the packaging film is subjected to hot ironing and shaping through the heating plate, the air leakage opening is sealed through hot melting through the heating plate. According to the packaging device, impact airflow generated when air wrapped in the packaging film extrudes and explodes the packaging film can be avoided, axial displacement of a paper roll caused by airflow impact is avoided, dislocation of patterns on the packaging film due to axial displacement of the paper roll is prevented, and the packaging quality is improved.

Description

Technical Field

[0001] The invention relates to packaging equipment, in particular to a paper roll packaging machine which can seal and shape a packaging film wrapping a paper roll at the end surface of the paper roll. Background Art

[0002] The paper roll packaging machine seals and shapes the packaging film that wraps the paper roll at the end face of the paper roll by first using a clamping piece to clamp and hot-melt the open end of the packaging film protruding from the end of the paper roll to form a sealed end of the packaging film protruding from the end of the paper roll, then uses a trimming plate to bend and converge the packaging film protruding from the end of the paper roll to fit it to the end face of the paper roll, and then uses a heating plate to heat and shape the packaging film attached to the end face of the paper roll.

[0003] The sealing end of the packaging film formed by the clamping parts of the existing paper roll packaging machine clamping the hot-melt packaging film is completely sealed, and the packaging film sealed by the clamping parts forms an airtight closed space. The volume of the closed space will shrink when the edge plate bends and converges the packaging film protruding from the end of the paper roll to fit it to the end face of the paper roll. If the volume shrinks too much, the air wrapped in the packaging film will burst the packaging film and produce air flow impact. The paper roll wrapped in the packaging film will be axially displaced by the air flow impact, causing the pattern on the packaging film to be misaligned relative to the position of the paper roll. For example, the packaging film pattern that should cover the circumferential surface of the paper roll is offset to the end face of the paper roll, which ultimately affects the packaging quality of the paper roll product. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a paper roll packaging machine that prevents the pattern of the packaging film from being misaligned. For the same purpose, the present invention also provides a method for preventing the pattern of the packaging film from being misaligned in the paper roll packaging machine.

[0005] The present invention is implemented as follows: a paper roll packaging machine that prevents the pattern of a packaging film from being misaligned includes a clamping piece that clamps and hot-melts an open end of the packaging film protruding from the end of the paper roll to form a sealed end of the packaging film, a trimming plate that bends and converges the packaging film protruding from the end of the paper roll to adhere to the end surface of the paper roll, and a heating plate that hot-scales and shapes the packaging film adhered to the end surface of the paper roll. In particular, the clamping piece is provided with a vacant portion that has no hot-melting effect on the packaging film, so that the sealed end of the packaging film formed by the clamping piece clamping the hot-melt packaging film has an air vent.

[0006] As the best implementation method, when viewed from the end face of the paper roll, the missing portion is located at a portion of the clamping member that deviates from the center of the paper roll; the surface of the edge trimming plate is close to the end face of the rolling paper roll, and when viewed from the end face of the paper roll, the edge trimming plate is divided into two separated pieces, and the interval between the two edge trimming plates gradually decreases from large to small along the rolling direction of the paper roll and approaches the center of the paper roll.

[0007] The method described in the present invention is achieved as follows: a method for preventing the pattern of a packaging film from being misaligned in a paper roll packaging machine, firstly, a clamping piece is used to clamp and hot-melt the open end of the packaging film protruding from the end of the paper roll to form a sealed end of the packaging film protruding from the end of the paper roll, and then a trimming plate is used to bend and converge the packaging film protruding from the end of the paper roll to fit it to the end face of the paper roll, and then a heating plate is used to heat-scaling and shaping the packaging film attached to the end face of the paper roll. In particular, the clamping piece is provided with a vacant portion that has no hot-melting effect on the packaging film, so that an air vent is left at the sealed end of the packaging film formed by the clamping piece clamping the hot-melt packaging film, and the air vent is used to discharge the air wrapped in the packaging film during the process of the trimming plate bending and converging the packaging film protruding from the end of the paper roll to fit it to the end face of the paper roll, and the air vent is used to heat-scaling and sealing the packaging film attached to the end face of the paper roll during the process of the heating plate hot-scaling and shaping the packaging film attached to the end face of the paper roll.

[0008] As the best implementation mode, when viewed from the end face of the paper roll, the missing portion is located at a portion of the clamping piece that deviates from the center of the paper roll, so that the air vent is located at a portion of the sealing end of the packaging film that deviates from the center of the paper roll; after the sealing end of the packaging film is formed, the paper roll is rolled, and the plate surface of the edge trimming plate is close to the end face of the rolling paper roll. When viewed from the end face of the paper roll, the edge trimming plate is divided into two separated pieces, and the interval between the two edge trimming plates gradually approaches the center of the paper roll from large to small along the rolling direction of the paper roll. In the process of rolling the paper roll, the packaging film protruding from the end of the paper roll is gradually bent and converged to fit onto the end face of the paper roll by utilizing the gradually shrinking interval between the two edge trimming plates.

[0009] The advantages of the present invention are as follows: an air vent is left at the sealed end of the packaging film formed by the hot-melt packaging film clamped by the clamping piece, and in the process of the packaging film being bent and converged by the edge plate to fit the packaging film to the end surface of the paper roll, the air wrapped in the packaging film can be discharged from the air vent, thereby avoiding the air from squeezing and bursting the packaging film to generate airflow impact, thereby avoiding the axial displacement of the paper roll due to the airflow impact, preventing the pattern on the packaging film from being dislocated due to the axial displacement of the paper roll, and improving the packaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 1 is a schematic diagram of the structure of the clamping and pressing member in the paper roll packaging machine of the present invention, wherein the clamping and pressing member is in a closed state; Figure 2 It is a schematic structural diagram of the edge trimming plate in the paper roll packaging machine of the present invention, and the edge trimming plate is drawn transparently to facilitate the display of the packaging film on the end surface of the paper roll; Figure 3 yes Figure 2 A top view of Figure 4 It is a schematic diagram of the structure of the heating plate in the paper roll packaging machine of the present invention, and the heating plate is drawn transparently to facilitate the display of the packaging film on the end surface of the paper roll; Figure 5 yes Figure 4A top view of Figure 6 yes Figure 1 The left side view of the clamping part in the figure and the paper roll on the right; Figure 7 yes Figure 6 A schematic diagram of the clamping member after it is opened; Figure 8 Is driven Figure 2 A schematic diagram of an embodiment of paper roll rolling in FIG. 1 , in which the Figure 2 The edge trimming board. DETAILED DESCRIPTION

[0011] To facilitate understanding of the present invention, the present invention is described more fully below by way of examples. The examples provide embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in the examples.

[0012] The paper roll packaging machine of the present invention comprises Figure 1 The clamping member 1 shown, Figure 2 The edge trimming board 2 shown, and Figure 4 The heating plate 3 shown. When the clamping member 1 is as Figure 1 When the clamping member 1 is closed, the open end of the packaging film 4 protruding from the end of the paper roll 8 is clamped and hot-melted to form a sealed end of the packaging film. In this embodiment, a cutter 5 is installed inside the clamping member 1. When the clamping member 1 is closed, the cutter 5 cuts the packaging film. After the sealed end of the packaging film is formed, Figure 2 and Figure 3 As shown, the packaging film 4 protruding from the end of the paper roll is bent and converged by the edge plate 2 to fit the end surface of the paper roll 8. Figure 4 , Figure 5 As shown, the packaging film attached to the end surface of the paper roll 8 is heat-stamped and shaped by the heating plate 3. It should be noted that in order to clearly show the main structure related to the purpose of the present invention, Figures 1 to 5 The mechanism used for supporting and driving the paper roll and the packaging film to move together, which is the same as that of the existing paper roll packaging machine, is omitted.

[0013] See also Figure 6 , the clamping piece 1 is provided with a vacant portion 6 which has no heat-melting effect on the packaging film. Specifically, the vacant portion 6 of this embodiment is a notch provided on the clamping surface of the clamping piece 1. When the clamping piece 1 is closed, Figure 6 As shown in FIG. 1 , the vacant portion 6 does not clamp the packaging film and has no hot-melting effect on the packaging film, so that the sealed end of the packaging film formed by the clamping and pressing member 1 clamping the hot-melting packaging film is as shown in FIG. Figure 6 , Figure 7 As shown, a vent hole 7 is provided.

[0014] As the best implementation, Figure 6As shown, from the end face of the paper roll 8, the gap 6 is located at the part of the clamping member 1 that deviates from the center of the paper roll, so that the formed air leakage port 7 is located at the part of the sealing end of the packaging film that deviates from the center of the paper roll. Figure 2 , Figure 3 As shown in FIG. 1 , the plate surface of the edge trimming plate 2 is close to the end surface of the rolling paper roll 8. When viewed from the end surface of the paper roll, as shown in FIG. Figure 2 As shown, the edge trimming plate 2 is divided into two separated pieces, and the interval 9 between the two edge trimming plates 2 gradually approaches the center of the paper roll from large to small along the rolling direction of the paper roll. Figure 2 and Figure 3 As shown, as the paper roll rolls from left to right, the gradually narrowing interval 9 of the two edge trimming plates plays a role in gradually bending and converging the packaging film 4 protruding from the end of the paper roll to fit it to the end surface of the paper roll, and the packaging film attached to the end surface of the paper roll forms spiral laminated wrinkles 10 at a position deviating from the center of the paper roll. Since the air vent 7 is also located at a position deviating from the center of the paper roll, the spiral laminated packaging film wrinkles 10 play a role in pinching and covering the air vent 7, which is conducive to closing the air vent 7 but does not affect the air venting function of the air vent 7.

[0015] The following is a method for preventing the pattern of the packaging film from being misaligned in the paper roll packaging machine of this embodiment, with reference to the accompanying drawings. Figure 1 As shown, the open end of the packaging film 4 protruding from the end of the paper roll 8 is clamped and hot-melted by the clamping member 1 to form a sealed end of the packaging film protruding from the end of the paper roll. Figure 6 , Figure 7 As shown in FIG. 1 , the vacant portion 6 on the clamping member 1 leaves an air vent 7 at the sealed end of the packaging film at a position deviating from the center of the paper roll. Figure 2 , Figure 3 As shown, the paper roll 8 is rolled, and the edge trimming board 2 is close to the end face of the paper roll. As the paper roll rolls from left to right, the packaging film 4 protruding from the end of the paper roll is gradually bent and converged to fit the end face of the paper roll by using the gradually narrowing gap 9 between the two edge trimming boards 2. Figure 7 The air vent 7 shown in the figure discharges the air wrapped in the packaging film, preventing the packaging film from being squeezed and exploded by the air and causing airflow impact, thereby preventing the paper roll from being impacted by the airflow and causing axial displacement, and preventing the pattern on the packaging film from being misaligned due to the axial displacement of the paper roll. Figure 2 The spirally stacked corrugations 10 shown in FIG. Figure 4 , Figure 5As shown, the packaging film attached to the end surface of the paper roll 8 is heat-stamped and shaped by the heating plate 3. Since the vent 7 is covered by the spirally laminated packaging film wrinkles 10 on the end surface of the paper roll, as long as the heating plate 3 heats and shaped the spirally laminated packaging film wrinkles 10, the vent 7 is sealed by heat melting.

[0016] The clamping member 1 of the above embodiment is as follows Figure 6 As shown, two vacant portions 6 are provided, thereby leaving two air vents 7 at the sealed end of the packaging film. As another embodiment, the clamping member 1 may also be provided with only one vacant portion, leaving only one air vent at the sealed end of the packaging film.

[0017] Drive Figure 2 An embodiment of the paper roll 8 rolling in the Figure 8 As shown, the paper roll 8 is sandwiched between the upper and lower circulating belts 11 and 12, and the speed difference between the two circulating belts 11 and 12 is used to roll the paper roll 8. The paper roll 8 can roll along the lower circulating belt 12, that is, Figure 8 The paper roll 8 in the middle moves to the right while rotating clockwise. The paper roll 8 can also roll along the upper circulating belt 11, that is, Figure 8 The paper roll 8 in the paper roll moves to the right while rotating counterclockwise. The movement and rotation direction of the paper roll are determined by the speed difference of the two circulating belts 11, 12.

[0018] It should be noted that the vacant portion having no heat-melting effect on the packaging film of the present invention is not limited to Figure 6 The notch structure shown. For example, the clamping surface of the clamping piece may not have a notch, and the clamping piece can completely clamp the open end of the packaging film. However, the clamping piece only has a sufficient temperature to heat-melt the packaging film at the part close to the center of the paper roll, and the part of the clamping piece that is far from the center of the paper roll maintains a lower temperature and is not enough to heat-melt the packaging film. Therefore, even if the clamping piece completely clamps the open end of the packaging film, the sealed end of the packaging film formed can still form a vent at the part with insufficient temperature. The clamping piece of this structure also belongs to a type that is provided with a vacant part that has no heat-melting effect on the packaging film.

[0019] In order to enable the clamping piece to heat-melt the packaging film, an electric heating element such as an electric heating wire or an electric heating tube may be provided in the clamping piece. However, the clamping piece of the present invention may also not use an electric heating element. For example, an ultrasonic element may be provided on the clamping surface of the clamping piece to heat-melt the open end of the packaging film to form a sealed end using ultrasonic waves.

[0020] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A paper roll packaging machine for preventing the pattern of a packaging film from being misaligned, comprising a clamping member for clamping and hot-melting the open end of the packaging film protruding from the end of the paper roll to form a sealed end of the packaging film, a trimming plate for bending and converging the packaging film protruding from the end of the paper roll to adhere to the end surface of the paper roll, and a heating plate for hot-stamping and shaping the packaging film adhered to the end surface of the paper roll, wherein the characteristics are: The clamping piece is provided with a vacant part which has no hot-melting effect on the packaging film, so that an air leakage hole is left at the sealed end of the packaging film formed by the clamping piece clamping the hot-melt packaging film.

2. The paper roll packaging machine for preventing the dislocation of packaging film patterns as claimed in claim 1, characterized in that: Seen from the end face of the paper roll, the gap is located at a portion of the clamping piece that deviates from the center of the paper roll; the surface of the edge trimming plate is close to the end face of the rolling paper roll, and seen from the end face of the paper roll, the edge trimming plate is divided into two separated pieces, and the interval between the two edge trimming plates gradually decreases from large to small along the rolling direction of the paper roll and approaches the center of the paper roll.

3. A method for preventing the pattern of the packaging film from being misaligned in a paper roll packaging machine is to first clamp and heat-melt the open end of the packaging film protruding from the end of the paper roll with a clamping member to form a sealed end of the packaging film protruding from the end of the paper roll, and then use a trimming plate to bend and converge the packaging film protruding from the end of the paper roll to fit it to the end surface of the paper roll, and then use a heating plate to heat and shape the packaging film attached to the end surface of the paper roll, which is characterized by: The clamping piece is provided with a vacant portion which has no hot-melting effect on the packaging film, so that an air vent is left at the sealed end of the packaging film formed by the clamping piece clamping the hot-melt packaging film. The air vent is used to discharge the air wrapped in the packaging film when the edge plate bends and converges the packaging film protruding from the end of the paper roll to fit it to the end surface of the paper roll. The air vent is used to hot-melt and seal the packaging film when the heating plate heats and shapes the packaging film attached to the end surface of the paper roll.

4. The method for preventing the pattern dislocation of the packaging film of the paper roll packaging machine according to claim 3, characterized in that: Seen from the end face of the paper roll, the vacant portion is located at a portion of the clamping piece that deviates from the center of the paper roll, so that the air vent is located at a portion of the sealing end of the packaging film that deviates from the center of the paper roll; after the sealing end of the packaging film is formed, the paper roll is rolled, and the plate surface of the edge trimming plate is close to the end face of the rolling paper roll. Seen from the end face of the paper roll, the edge trimming plate is divided into two separated pieces, and the interval between the two edge trimming plates gradually approaches the center of the paper roll from large to small along the rolling direction of the paper roll. In the process of rolling of the paper roll, the packaging film protruding from the end of the paper roll is gradually bent and converged to fit onto the end face of the paper roll by utilizing the gradually shrinking interval between the two edge trimming plates.

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