Embossing roller for food packaging bag

Abstract

The utility model relates to the field of embossing rollers, in particular to an embossing roller for food packaging bags, which comprises a roller core (1), a channel (2) arranged in the middle of the roller core (1) and used for being fixed with a roller press, mounting plates (3) arranged at two ends of the roller core (1), an embossing component (4) arranged on the outer surface of the roller core (1) and detachably matched with the roller core (1), and a cavity (5) arranged in the roller core (1). Heating liquid is injected into the cavity (5), a heating assembly (6) is installed in the roller core (1), and the heating assembly (6) heats the heating liquid. The embossing roller has the advantages of being reliable in embossing and wide in application range.

Description

Technical Field

[0001] This utility model relates to the field of embossing rollers, and mainly to embossing rollers used for food packaging bags. Background Technology

[0002] Embossing rollers are generally used for creating patterns on the surface of packaging bags or products. Specifically, in the plastic bag industry, cold-pressing rollers or hot-pressing rollers are commonly used. Cold-pressing rollers, also known as embossing rollers, are at room temperature, while the packaging bags or products to be pressed are hot, allowing for direct shaping. Hot-pressing rollers, on the other hand, rely on the heat of the roller to deform the product and create the embossing. For example, Chinese patent CN2541491Y discloses a silicone embossing roller.

[0003] However, this type of embossing roller is difficult to control in terms of temperature, whether it is cold or hot pressing, resulting in poor embossing effect. The pattern on the embossing roller needs to be one pattern per roller, which is costly. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by providing an embossing roller for food packaging bags.

[0005] An embossing roller for food packaging bags includes a roller core with a channel in the middle for fixing to a roller press. Mounting plates are provided at both ends of the roller core. An embossing assembly is provided on the outer surface of the roller core. The embossing assembly and the roller core are detachably connected. A cavity is provided inside the roller core, and a heating liquid is injected into the cavity. A heating assembly is installed inside the roller core to heat the heating liquid.

[0006] Preferably, the inner surface of the channel is provided with a rubber pad or an insulating pad.

[0007] Preferably, the inner wall of the roller core is provided with multiple sets of mounting cavities, and heating units are installed in the mounting cavities.

[0008] Preferably, the heating fluid injected into the cavity is water or oil.

[0009] Preferably, a temperature sensor is installed inside the cavity.

[0010] Preferably, the mounting plate includes a first mounting plate integrally formed with the roller core and a second mounting plate whose other end is threaded with the roller core, with the liquid injection port of the cavity located on the first mounting plate.

[0011] Preferably, the outer surface of the roller core is provided with guide strips along its axial direction.

[0012] Preferably, the inner side of the embossing component is provided with a guide groove, and the embossing component is a rubber roller skin or a steel roller skin.

[0013] Compared with existing technologies, this solution has the following advantages: The embossing roller in this solution uses liquid heating, which has a better specific heat capacity. During cold pressing, it can reduce the temperature difference between the packaging bag and the roller, thereby avoiding large local shrinkage and deformation of the packaging bag during the embossing process. Secondly, since the temperature of the roller is basically uniform during hot pressing, the product yield is high, and the pattern on the roller is easier to create and smoother, saving costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the roller core structure.

[0015] Figure 2 for Figure 1 The main view.

[0016] Figure 3 yes Figure 2 The cross-sectional view was added, along with structural schematic diagrams of the heating and embossing components.

[0017] The technical names of the reference numerals in the figure are: 1—roller core, 2—channel, 3—mounting plate, 4—embossing assembly, 5—cavity, 6—heating assembly, 7—mounting cavity, 8—first mounting plate, 9—second mounting plate, 10—guide strip. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0019] Example 1

[0020] An embossing roller for food packaging bags includes a roller core 1, a channel 2 in the middle of the roller core 1 for fixing to a roller pressing machine, mounting plates 3 at both ends of the roller core 1, an embossing assembly 4 on the outer surface of the roller core 1 (the embossing assembly 4 and the roller core 1 are detachably fitted), a cavity 5 inside the roller core 1 filled with heating liquid, and a heating assembly 6 installed inside the roller core 1 to heat the heating liquid. The roller core 1 can be heated by using an inner ring that is a poor conductor of heat and an outer ring that is a good conductor of heat, thus avoiding heat loss. In this design, an insulation layer is provided on the inner side of the inner ring of the roller to achieve this function.

[0021] The inner surface of the specific channel 2 is provided with a rubber pad or an insulating pad.

[0022] In this design, the inner wall of the roller core 1 is provided with multiple sets of mounting cavities 7, and heating units are installed in the mounting cavities 7. Specifically, the heating units are heating resistance wires.

[0023] The heating liquid injected into cavity 5 is either water or oil. When the temperature of the heating roller does not exceed 100 degrees Celsius, the water-level heating unit is selected; otherwise, the selection is adjusted according to actual needs. In this design, a temperature sensor is installed inside cavity 5, which can collect data in real time.

[0024] In this design, the mounting plate 3 includes a first mounting plate 8 integrally formed with the roller core 1 and a second mounting plate 9 with its other end threadedly engaged with the roller core 1. The liquid injection port of the cavity 5 is located on the first mounting plate 8. The second mounting plate 9 is fixed to the roller core 1 by threaded engagement. When the embossing assembly 4 is installed, the second mounting plate 9 is threadedly mounted on the roller core 1, and the second mounting plate 9 abuts against the embossing assembly 4.

[0025] In this embodiment, a guide strip 10 is provided on the outer surface of the roller core 1 along its axial direction. The guide strip 10 facilitates the installation of the embossing assembly 4 and ensures that the roller embossing assembly 4 does not spin idly.

[0026] The embossing component 4 has a guide groove on its inner side. The embossing component 4 is made of rubber roller skin or steel roller skin. Different embossing roller structures can be replaced as needed for the embossing component 4.

[0027] In summary, the embossing roller in this solution utilizes liquid heating, which has a good specific heat capacity. During cold pressing, it can reduce the temperature difference between the packaging bag and the roller, thereby avoiding large local shrinkage and deformation of the packaging bag during the embossing process. Secondly, because the roller temperature is basically uniform during hot pressing, the product yield is high, and the roller pattern is easier to create and smoother, saving costs.

[0028] Example 2

[0029] The difference between this embodiment and Embodiment 1 is that the embossing roller has a rubber outer skin and a metal support on the inner side.

[0030] Example 3

[0031] The embossing machine is equipped with the aforementioned embossing rollers.

Claims

1. An embossing roller for food packaging bags, characterized in that: The roller core (1) includes a channel (2) in the middle of the roller core (1) for fixing with the roller press. Mounting plates (3) are provided at both ends of the roller core (1). Embossing components (4) are provided on the outer surface of the roller core (1). The embossing components (4) and the roller core (1) are detachably connected. A cavity (5) is provided inside the roller core (1). Heating liquid is injected into the cavity (5). A heating component (6) is installed inside the roller core (1) to heat the heating liquid.

2. The embossing roller for food packaging bags according to claim 1, characterized in that: The inner surface of the channel (2) is provided with a rubber pad or an insulating pad.

3. The embossing roller for food packaging bags according to claim 2, characterized in that: The inner wall of the roller core (1) is provided with multiple sets of mounting cavities (7), and heating units are installed in the mounting cavities (7).

4. The embossing roller for food packaging bags according to claim 1, characterized in that: The heating liquid injected into the cavity (5) is water or oil.

5. The embossing roller for food packaging bags according to claim 4, characterized in that: A temperature sensor is installed inside the cavity (5).

6. The embossing roller for food packaging bags according to claim 4, characterized in that: The mounting plate (3) includes a first mounting plate (8) integrally formed with the roller core (1) and a second mounting plate (9) threaded to the roller core (1) at the other end. The liquid injection port of the cavity (5) is located on the first mounting plate (8).

7. The embossing roller for food packaging bags according to claim 1, characterized in that: Guide strips (10) are provided on the outer side of the roller core (1) along its axial direction.

8. The embossing roller for food packaging bags according to claim 5, characterized in that: The inner side of the embossing component (4) is provided with a guide groove, and the embossing component (4) is a rubber roller skin or a steel roller skin.

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