CN215661786U - Auxiliary shaping device for hot melt adhesive film - Google Patents
Auxiliary shaping device for hot melt adhesive film Download PDFInfo
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- CN215661786U CN215661786U CN202122231156.9U CN202122231156U CN215661786U CN 215661786 U CN215661786 U CN 215661786U CN 202122231156 U CN202122231156 U CN 202122231156U CN 215661786 U CN215661786 U CN 215661786U
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- hot melt
- melt adhesive
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- auxiliary
- adhesive film
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Abstract
The utility model relates to the technical field of production equipment, in particular to an auxiliary shaping device for a hot melt adhesive film, which comprises a mold and an auxiliary shaping assembly, wherein the auxiliary shaping assembly is fixed below the mold; the mould comprises a mould cavity and a mould opening, the mould opening is formed in the bottom wall of the mould cavity, the mould opening is in a longitudinal shape, the mould cavity is used for receiving the melted hot melt adhesive colloid, and the mould opening is used for allowing the hot melt adhesive colloid to flow out and forming a longitudinal hot melt adhesive film; the auxiliary shaping assembly is used for adjustably emitting transverse airflow with the air pressure being greater than or equal to 0.2MPa, the transverse airflow faces the film surface of the hot melt adhesive film, and the transverse airflow is used for limiting the width of the hot melt adhesive film flowing out of the die opening. The utility model can send a stable airflow transversely covering the whole material flow between the die opening and the pressing point of the pressing roller and the rubber roller, and the stable airflow acts on the surface of the material flow to lock the material flow without obviously changing the material flow in the transverse contraction aspect, so that the thickness and the width of the film are correspondingly stabilized, and the production of the hot melt adhesive film is facilitated.
Description
Technical Field
The utility model relates to the technical field of production equipment, in particular to an auxiliary shaping device for a hot melt adhesive film.
Background
The hot melt adhesive film is a plastic adhesive, the physical state of the hot melt adhesive film changes along with the temperature change within a certain temperature range, namely the hot melt adhesive film is in a solid state at normal temperature, can be quickly bonded after being heated and melted, has unchanged chemical characteristics, and is widely applied to bonding application of common materials such as fabrics, paper, high polymer materials, metals and the like.
The existing hot melt adhesive film is produced by adopting a hot processing method, wherein a heating device is mainly used for melting granular sizing materials, the material flow is formed into a sheet-shaped film after flowing out through a die, and the sheet-shaped film is pressed and formed by an embossing roller and a rubber roller, cooled and shaped, and then is pulled and wound by a winding device to obtain the hot melt adhesive film (as shown in figure 1). However, the product has the problems of unstable transverse width (small time, fluctuation range reaching +/-5 cm), unstable film thickness (small thickness when the width is large, small thickness when the width is small, and fluctuation range reaching +/-20 mu m) (as shown in figure 2), and exceeds the qualified standard range of the product.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an auxiliary shaping device for a hot melt adhesive film, which can produce the hot melt adhesive film with stable width and stable thickness by adjusting process conditions.
In order to achieve the purpose, the utility model adopts the following technical scheme:
an auxiliary shaping device of a hot melt adhesive film comprises a mold and an auxiliary shaping assembly, wherein the auxiliary shaping assembly is fixed below the mold;
the mould comprises a mould cavity and a mould opening, the mould opening is formed in the bottom wall of the mould cavity, the mould opening is long, the mould cavity is used for receiving the melted hot melt adhesive colloid, and the mould opening is used for allowing the hot melt adhesive colloid to flow out and forming a long hot melt adhesive film;
the auxiliary shaping assembly is used for adjustably emitting transverse airflow with the air pressure being greater than or equal to 0.2MPa, the transverse airflow faces the film surface of the hot melt adhesive film, and the transverse airflow is used for limiting the width of the hot melt adhesive film flowing out of the die opening.
Preferably, the auxiliary shaping assembly can adjustably introduce a transverse airflow with the air pressure of 0.2-0.6 MPa.
Preferably, the auxiliary shaping assembly comprises an installation back plate, a U-shaped ring, a connecting air pipe, an adjusting air valve, a pressure gauge and an auxiliary piece, the connecting air pipe is fixedly connected with the auxiliary piece through the adjusting air valve and the pressure gauge, and the auxiliary piece is fixedly arranged on the installation back plate through the U-shaped ring;
the auxiliary part comprises an air inlet, an air cavity and an air outlet, the air inlet and the air outlet are communicated through the air cavity, the auxiliary part is of a transverse square body or a transverse cylindrical structure, the air cavity is a transverse square body cavity or a transverse cylindrical cavity, the number of the air inlets is two, the two air inlets are arranged at two ends of the transverse direction of the auxiliary part, the air outlet is arranged on the side wall of the auxiliary part, the air outlet is in a longitudinal shape, the length of the air outlet is the same as that of the mold opening, and the width of the air outlet is 0.1 mm.
Preferably, the air outlet direction of the air outlet is perpendicular to the direction of the hot melt adhesive film flowing out of the die opening, the distance between the air outlet and the longitudinal direction of the die opening is 3-5cm, and the distance between the air outlet and the transverse direction of the die opening is 1-3 mm.
Preferably, the distance between the air outlet and the longitudinal direction of the die opening is 4cm, and the distance between the air outlet and the transverse direction of the die opening is 2 mm.
Preferably, the mould further comprises a temperature control assembly, wherein the temperature control assembly comprises a first temperature sensor, a second temperature sensor and a temperature controller, the first temperature sensor is arranged close to the mould opening, and the second temperature sensor is arranged on the connecting air pipe;
the inner wall of the connecting air pipe is provided with a heating layer, a heating wire is arranged in the heating layer, and the heating wire is electrically connected with the temperature controller through the second temperature sensor.
Preferably, the outer wall of the auxiliary element is further provided with a heat insulation layer.
Compared with the prior art, the technical scheme has the following beneficial effects: the auxiliary shaping device can emit a stable airflow transversely covering the whole material flow between the die opening and the pressing point of the pressing roller and the rubber roller, acts on the surface of the material flow, locks the material flow without obviously changing the material flow in the transverse contraction direction, correspondingly stabilizes the thickness and the width of the film, and is beneficial to the production of hot melt adhesive films.
Drawings
FIG. 1 is a schematic diagram of the production of a prior art hot melt adhesive film;
FIG. 2 is a schematic front view of a prior art flow of molten hot melt adhesive film exiting a die;
FIG. 3 is a schematic structural view of the auxiliary setting device of the present invention;
FIG. 4 is a schematic side sectional view of the auxiliary setting device of the present invention;
FIG. 5 is a schematic structural view of an auxiliary styling member of the present invention;
FIG. 6 is a labeled schematic view of the air outlet of the auxiliary styling assembly of the present invention;
in the drawings: the device comprises a mould 1, a mould cavity 11, a mould opening 12, an auxiliary shaping component 2, an installation back plate 21, a U-shaped ring 22, a connecting air pipe 23, an adjusting air valve 24, a pressure gauge 25, an auxiliary part 26, an air outlet 27, a molten hot melt adhesive colloid 31, a hot melt adhesive film 32, a press-fit roller 33, a rubber roller 34, a winding device 35, a distance ly between the air outlet and the mould opening in the longitudinal direction, a distance lx between the air outlet and the mould opening in the transverse direction, a length a of the air outlet and a width b of the air outlet.
Detailed Description
The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
An auxiliary shaping device of a hot melt adhesive film comprises a mold 1 and an auxiliary shaping assembly 2, wherein the auxiliary shaping assembly 2 is fixed below the mold 1;
the mold 1 comprises a mold cavity 11 and a mold opening 12, the mold opening 12 is formed in the bottom wall of the mold cavity 11, the mold opening 12 is long, the mold cavity 11 is used for receiving the molten hot melt adhesive colloid 31, and the mold opening 12 is used for allowing the hot melt adhesive colloid to flow out and forming a long hot melt adhesive film 32;
the auxiliary shaping assembly 2 is used for adjustably emitting a transverse airflow with the air pressure greater than or equal to 0.2MPa, the transverse airflow faces the film surface of the hot melt adhesive film 32, and the transverse airflow is used for limiting the width of the hot melt adhesive film 32 flowing out of the die opening 12.
As mentioned in the background art, the thickness and width of the hot melt adhesive film produced by the existing thermal processing are unstable, and experiments prove that the distance from the outlet of the mold 12 to the pressing point of the pressing roller 33 and the rubber roller 34 of the hot melt adhesive film 32 is in a relatively free state, and the hot melt adhesive film is stretched and thinned only by the longitudinal forward traction force, but not transversely subjected to any action force, so that the material flow is transversely contracted and the contraction degree is irregular and unstable (small time), the width and the thickness of the film are large when the contraction degree is large, and the width and the thickness of the film are large and small when the contraction degree is small, as shown in fig. 1-2. The utility model thus uses an auxiliary shaping device which is able to emit a stable transverse air flow over the entire material flow between the die orifice 12 and the pressure point of the laminating roller 33 and the glue roller 34, acting on the surface of the material flow, locking the material flow without significant changes in the transverse shrinkage, correspondingly stabilizing the thickness and width of the film, facilitating the production of hot-melt adhesive films, as shown in fig. 3-4.
It should be noted that, the auxiliary shaping assembly 2 emits a transverse airflow with an air pressure greater than or equal to 0.2MPa, the thickness of the hot melt adhesive film 32 is 10-150 μm, and experiments prove that when the air pressure of the transverse airflow is less than 0.2MPa, the material flow swings indefinitely; therefore, by adjusting the process conditions, a hot melt adhesive film with stable width and stable thickness in the thickness range can be produced, and the transverse gas flow can be pure gas or mixed gas, but does not react with the components of the hot melt adhesive film 32.
In a further elaboration, the auxiliary shaping assembly 2 is adjustably introduced with a transverse air flow with an air pressure of 0.2-0.6 MPa. Because the size of the airflow is changed, the strength of the emitted airflow is different, so that films with different widths can be obtained, specifically, the width of the hot melt adhesive film is large when the airflow is large, and the width of the hot melt adhesive film is small when the airflow is small. But the airflow cannot be too small, and when the airflow is less than 0.2MPa, the material flow can swing; when the airflow reaches 0.2MPa, the material flow is stable and does not swing, and the width is stable and is 18 cm; when the airflow is increased, the width of the material flow is increased, the width reaches and stabilizes to 30cm when the airflow is 0.6MPa, but the airflow blows the material flow when the airflow exceeds 0.6MPa, and the production quality of the hot melt adhesive film is affected.
In a further description, the auxiliary sizing assembly 2 includes a mounting back plate 21, a U-shaped ring 22, a connecting air pipe 23, a regulating air valve 24, a pressure gauge 25 and an auxiliary member 26, the connecting air pipe 23 is connected and fixed to the auxiliary member 26 through the regulating air valve 24 and the pressure gauge 25, and the auxiliary member 26 is fixed to the mounting back plate 21 through the U-shaped ring 22;
the auxiliary part 26 comprises an air inlet, an air cavity and an air outlet 27, the air inlet and the air outlet 27 are communicated through the air cavity, the auxiliary part 26 is of a transverse square body or transverse cylindrical structure, the air cavity is a transverse square body cavity or a transverse cylindrical cavity, the number of the air inlets is two, the two air inlets are arranged at two ends of the auxiliary part 26 in the transverse direction, the air outlet 27 is arranged on the side wall of the auxiliary part 26, the air outlet 27 is in a longitudinal shape, the length a of the air outlet 27 is the same as that of the mold opening 12, and the width b of the air outlet is 0.1 mm.
In the embodiment, the air flow is led into the transverse air cavity through the air inlets in two directions and led out through the air outlet 27 in the longitudinal and long shape, so that stable air flow can be formed, and experiments prove that when the length and the width of the air outlet 27 are limited, the production cost can be saved, namely, the effective rate of the air flow is the highest, and the quality of the hot melt adhesive film is better.
It should be noted that the connecting air pipe 23 is externally connected with a gas storage cylinder, and the gas storage cylinder stores gas.
Preferably, the auxiliary member 26 is a horizontal cylindrical steel pipe in this embodiment, and the length a of the air outlet 27 and the length of the die opening 12 are 30 cm.
Further, the air outlet direction of the air outlet 27 is perpendicular to the direction of the hot melt adhesive film flowing out of the die opening 12, the distance ly between the air outlet 27 and the longitudinal direction of the die opening 12 is 3-5cm, and the distance lx between the air outlet and the transverse direction of the die opening 12 is 1-3 mm.
To be further described, the distance between the air outlet 27 and the longitudinal direction ly of the die opening 12 is 4cm, and the distance lx between the air outlet 27 and the transverse direction of the die opening 12 is 2 mm. The air outlet direction of the air outlet 27 is perpendicular to the hot melt adhesive film flowing out from the die opening 12, and the whole material flow can be covered in the transverse direction, so that the hot melt adhesive film 32 can generate stable air flow by receiving air from all positions; experiments show that the hot melt adhesive film starts to shrink within 3-5cm of the flow-out die opening 12, so that the air outlet 27 is arranged at a position where the distance ly between the air outlet 27 and the die opening 12 in the longitudinal direction is 4mm and the distance lx in the horizontal direction is 2mm, and the good quality of the formed hot melt adhesive film 32 is ensured.
Further, the mold further comprises a temperature control assembly, wherein the temperature control assembly comprises a first temperature sensor, a second temperature sensor and a temperature controller, the first temperature sensor is arranged close to the mold opening 12, and the second temperature sensor is arranged on the connecting air pipe 23;
the inner wall of connecting trachea 23 is equipped with the zone of heating, be equipped with the heater strip in the zone of heating, the heater strip passes through second temperature sensor with the temperature controller electricity is connected.
The experiment shows that the temperature of the hot melt adhesive film flowing down from the die opening 12 is high and can reach 180 ℃, and the quality of the hot melt adhesive film can be influenced by the overhigh or overlow temperature of the air flow sent by the auxiliary shaping assembly, so that the outflow temperature of the die opening 12 is monitored in real time through the first temperature sensor, the temperature data is transmitted back to the temperature controller through the electric connection, the heating wire is controlled to be started or closed, and the temperature difference between the heating wire and the temperature controller is reduced. Further, the temperature controller controls the heating temperature of the heating wire, and further controls the temperature emitted by the air flow to be 25-80 ℃ so as to improve the production quality of the hot melt adhesive film.
To explain further, the outer wall of the auxiliary element 26 is also provided with a thermal insulation layer. The thermal insulation layer is used for preventing temperature heat loss and insulating heat transfer of the auxiliary element 26 to prevent scalding.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the utility model and should not be construed in any way as limiting the scope of the utility model. Other embodiments of the utility model will occur to those skilled in the art without the exercise of inventive faculty based on the explanations herein, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined in the appended claims.
Claims (7)
1. The utility model provides a supplementary setting device of hot melt adhesive membrane which characterized in that: the device comprises a mould and an auxiliary shaping assembly, wherein the auxiliary shaping assembly is fixed below the mould;
the mould comprises a mould cavity and a mould opening, the mould opening is formed in the bottom wall of the mould cavity, the mould opening is long, the mould cavity is used for receiving the melted hot melt adhesive colloid, and the mould opening is used for allowing the hot melt adhesive colloid to flow out and forming a long hot melt adhesive film;
the auxiliary shaping assembly is used for adjustably emitting transverse airflow with the air pressure being greater than or equal to 0.2MPa, the transverse airflow faces the film surface of the hot melt adhesive film, and the transverse airflow is used for limiting the width of the hot melt adhesive film flowing out of the die opening.
2. The auxiliary shaping device of the hot melt adhesive film as claimed in claim 1, wherein: the auxiliary shaping component can adjustably introduce transverse airflow with the air pressure of 0.2-0.6 MPa.
3. The auxiliary shaping device of the hot melt adhesive film as claimed in claim 1, wherein the auxiliary shaping assembly comprises a mounting back plate, a U-shaped ring, a connecting air pipe, a regulating air valve, a pressure gauge and an auxiliary member, the connecting air pipe is connected and fixed to the auxiliary member through the regulating air valve and the pressure gauge, and the auxiliary member is fixed to the mounting back plate through the U-shaped ring;
the auxiliary part comprises an air inlet, an air cavity and an air outlet, the air inlet and the air outlet are communicated through the air cavity, the auxiliary part is of a transverse square body or a transverse cylindrical structure, the air cavity is a transverse square body cavity or a transverse cylindrical cavity, the number of the air inlets is two, the two air inlets are arranged at two ends of the transverse direction of the auxiliary part, the air outlet is arranged on the side wall of the auxiliary part, the air outlet is in a longitudinal shape, the length of the air outlet is the same as that of the mold opening, and the width of the air outlet is 0.1 mm.
4. The auxiliary shaping device of claim 3, wherein the air outlet direction of the air outlet is perpendicular to the direction of the hot melt adhesive film flowing out of the die opening, the distance between the air outlet and the longitudinal direction of the die opening is 3-5cm, and the distance between the air outlet and the transverse direction of the die opening is 1-3 mm.
5. The auxiliary shaping device of claim 4, wherein the distance between the air outlet and the longitudinal direction of the mold opening is 4cm, and the distance between the air outlet and the transverse direction of the mold opening is 2 mm.
6. The auxiliary shaping device of the hot melt adhesive film as claimed in claim 3, further comprising a temperature control assembly, wherein the temperature control assembly comprises a first temperature sensor, a second temperature sensor and a temperature controller, the first temperature sensor is disposed close to the mold opening, and the second temperature sensor is disposed in the connecting air pipe;
the inner wall of the connecting air pipe is provided with a heating layer, a heating wire is arranged in the heating layer, and the heating wire is electrically connected with the temperature controller through the second temperature sensor.
7. The auxiliary shaping device of claim 3, wherein the outer wall of the auxiliary member is further provided with a heat insulation layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122231156.9U CN215661786U (en) | 2021-09-15 | 2021-09-15 | Auxiliary shaping device for hot melt adhesive film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122231156.9U CN215661786U (en) | 2021-09-15 | 2021-09-15 | Auxiliary shaping device for hot melt adhesive film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215661786U true CN215661786U (en) | 2022-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122231156.9U Active CN215661786U (en) | 2021-09-15 | 2021-09-15 | Auxiliary shaping device for hot melt adhesive film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215661786U (en) |
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2021
- 2021-09-15 CN CN202122231156.9U patent/CN215661786U/en active Active
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