CN213860583U - TPU film production line - Google Patents

Abstract

A TPU film production line comprises a film blowing machine head, wherein the film blowing machine head is provided with an extrusion opening die, the extrusion opening die is provided with a circular ring-shaped gathering flow channel, the upper end of the circular ring-shaped gathering flow channel is a circular ring-shaped extrusion opening, a herringbone clamping plate is arranged above the circular ring-shaped extrusion opening, and a traction clamping roller is arranged above the herringbone clamping plate; the number of layers of the annular sleeve is five, the number of layers of the annular gap is four, and the number of the extruders is four; the film storage mechanism comprises a plurality of fixed rollers and movable rollers, the vertical positions of the fixed rollers and the movable rollers are arranged in a crossed manner, and each movable roller is arranged on a movable roller bracket; and an electric driving mechanism for driving the movable roller bracket is also arranged. The utility model discloses can peel off PE basic unit on line, the PE basic unit after peeling off moreover can not warp, avoids extravagant.

Description

TPU film production line

Technical Field

The utility model belongs to the technical field of film production facility, concretely relates to TPU film production line.

Background

TPU (thermoplastic polyurethanes) are thermoplastic elastomers, a plastic material that can be repeatedly softened or changed at a certain heat. The TPU film is manufactured by adopting TPU granules through a production line, inherits the excellent performance of TPU, and has good elasticity and viscosity.

However, due to the special properties of TPU, it is determined that TPU films cannot be formed by themselves, i.e., must be attached to other plastic substrates during the production process. The TPU film is most commonly formed by a casting coextrusion process, so that the TPU material layer is attached to the PE base layer for composite forming, and the TPU layer and the PE base layer are peeled after the composite forming.

However, the above production method has the following problems: in the production process, before the TPU layer and the PE base layer are peeled off, the TPU layer and the PE base layer at the front edge of the composite film material need to be manually separated by hands, then the TPU layer and the PE base layer are possibly respectively pulled and wound by utilizing two winding shafts to be gradually separated, but because the TPU layer has high viscosity, a period of time is consumed for manually separating the front edge of the composite film material, and the composite film produced at the upstream is continuously conveyed to the downstream, and the front edge of the composite film material is often not separated until the front edge of the composite film material is separated, so that the rolled composite film can be conveyed to a peeling mechanism for peeling after the composite film material is wound, the front edge of the composite film material is peeled off to separate the TPU layer and the PE base layer, but the TPU layer and the PE base layer cannot be peeled off as soon as possible (namely, the TPU layer and the PE base layer cannot be peeled off on line on a composite production line), in the time from compounding to waiting for peeling, the bonding force of the TPU layer and the PE base layer can be increased, the PE base layer is strongly stretched due to the fact that the TPU layer is large in viscosity, the PE base layer is not large in thickness, the PE base layer is seriously and irregularly deformed due to strong stretching, the peeled PE base layer cannot be utilized and becomes waste, and waste is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned shortcoming and provide a TPU film production line, it can peel off PE basic unit on line, and the PE basic unit after peeling off moreover can not warp, avoids extravagant.

The purpose can be realized according to the following scheme: a TPU film production line comprises a film blowing machine head, wherein the film blowing machine head is provided with an extrusion opening die, the extrusion opening die is provided with a circular ring-shaped gathering flow channel, the upper end of the circular ring-shaped gathering flow channel is a circular ring-shaped extrusion opening, a plurality of layers of circular ring-shaped sleeves which are sleeved with each other inside and outside and are concentrically arranged are arranged below the extrusion opening die, an annular gap is formed between every two adjacent internal and external circular ring-shaped sleeves, and the upper parts of the annular gaps of the layers are communicated and converged to the circular ring-shaped gathering flow channel; a plurality of spiral groove runners are formed in each layer of annular gap, the starting point of each spiral groove runner is located at the lower end of the annular gap, and the spiral groove runners of each layer of annular gap are uniformly distributed along the circumferential direction of the annular gap; each layer of annular gap is correspondingly provided with a feed inlet, a radial branch channel is arranged between each feed inlet and the starting point of the spiral groove channel of the corresponding layer of annular gap, and each feed inlet is correspondingly connected with an extruder; a herringbone clamping plate is arranged above the circular extrusion port, and a traction clamping roller is arranged above the herringbone clamping plate;

the extrusion molding machine is mainly characterized in that the number of layers of the annular sleeve is five, the number of layers of the annular gap is four, and the number of the extruders is four; the film storage mechanism comprises a plurality of fixed rollers and movable rollers, wherein each fixed roller is arranged into a vertical column, each movable roller is arranged into another vertical column, the vertical positions of the fixed rollers and the movable rollers are arranged in a cross way, and each movable roller is arranged on a movable roller bracket; and an electric driving mechanism for driving the movable roller bracket to horizontally move back and forth is also arranged.

The utility model has the advantages of it is following and effect:

the utility model utilizes the film blowing process to produce the TPU film; when the device works, a film blowing method is adopted to simultaneously extrude a TPU material and three layers of PE materials to form a circular composite film bubble, the composite film bubble is clamped and flattened by a herringbone clamping plate and a traction clamping roller to form a composite film material which is connected end to end in the circumferential direction, the composite film material which is connected end to end is cut by a cutting mechanism to form two superposed films, and each film comprises a TPU layer and three layers of PE; on the other hand, the utility model discloses be equipped with between traction nip roller and peeling means and store up membrane mechanism, therefore just begin to produce, when traction nip roller begins to carry out the composite film material downstream, can store up the composite film material temporarily by storing up membrane mechanism (specifically pull open the horizontal distance of fixed roller and activity roller, extension membrane material route), so, the workman can utilize during this period to take off separation with diaphragm front edge department TPU layer and PE layer leisurely, take off the TPU thin layer after the separation and PE thin film basic unit and guide TPU thin film rolling axle and PE thin film rolling axle respectively and carry out the rolling, TPU layer and PE basic unit just can realize carrying out online peeling off on the composite production line like this; due to on-line stripping, the TPU layer and the PE layer are not fully solidified during stripping, and the bonding force is small; on the other hand, the utility model discloses peel off the PE film basic unit that obtains and actually be the three-layer PE film of crowded altogether, its tensile strength who compares the individual layer PE film layer that obtains in traditional mode of production increases substantially, consequently, the utility model discloses the PE basic unit (the compound PE film of three-layer) that obtains after peeling off can not warp because of tensile basically, has kept the intact form of PE basic unit for the PE basic unit can carry out recycle as normal PE film, avoids extravagant.

Drawings

Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.

Fig. 2 is a schematic view of the film accumulating mechanism in fig. 1 in a state where the path of the film material is shortened.

Fig. 3 is a schematic view showing a state in which the film storing mechanism of fig. 1 is extended in the path of the film.

Fig. 4 is a schematic view of the internal structure of the blowing head.

FIG. 5 is a schematic horizontal projection structure of four extruders and a blowing head.

Fig. 6 is a schematic view of the connection structure of the radial branch channels between the feed inlet of each layer of materials and the starting point of each spiral groove channel.

Fig. 7 is a schematic view of the process of each layer of material flowing up through the spiral groove flow channels and gradually being evenly distributed in the circumferential direction.

Detailed Description

The TPU film production line shown in fig. 1, 4, 5, 6 and 7 comprises a film blowing machine head 1, wherein the film blowing machine head 1 is provided with an extrusion port die 11, the extrusion port die 11 is provided with a circular ring-shaped collecting flow channel 12, the upper end of the circular ring-shaped collecting flow channel 12 is provided with a circular ring-shaped extrusion port 10, five layers of circular ring-shaped sleeves 2 which are sleeved with each other from inside to outside and are concentrically arranged are arranged below the extrusion port die 11, an annular gap 3 is formed between every two adjacent circular ring-shaped sleeves 2 inside and outside, four layers of annular gaps 3 are formed in total, and the upper parts of the annular gaps 3 of all layers are communicated and converged to the circular ring-shaped collecting flow channel 12; eight spiral groove flow channels 4 are formed in each layer of the annular gap 3, the starting point 40 of each spiral groove flow channel is positioned at the lower end of the annular gap 3, and the spiral groove flow channels 4 of each layer of the annular gap 3 are uniformly distributed along the circumferential direction of the annular gap 3; each layer of annular gap 3 is correspondingly provided with one feed inlet 5, a radial shunt passage 51 is arranged between each feed inlet 5 and the starting point 40 of the spiral groove flow passage of the corresponding layer of annular gap, each feed inlet 5 is correspondingly connected with one extruder 52, and the total number of the extruders 52 is four; a herringbone clamping plate 6 is arranged above the circular extrusion port 10, a traction clamping roller 61 is arranged above the herringbone clamping plate 6, a film storage mechanism 7 is arranged at the downstream of the traction clamping roller 61, a splitting knife mechanism 9 is arranged at the downstream of the film storage mechanism 7, a stripping mechanism 62 is arranged at the downstream of the splitting knife mechanism 9, and a TPU film winding shaft 91 and a PE film winding shaft 92 are arranged at the downstream of the stripping mechanism 62.

As shown in fig. 2 and 3, the film storage mechanism 7 includes a plurality of fixed rollers 71 and movable rollers 72, wherein each fixed roller 71 is arranged in one vertical column, each movable roller 72 is arranged in another vertical column, the vertical positions of the fixed rollers 71 and the movable rollers 72 are arranged in a cross manner, each movable roller 72 is mounted on a movable roller support 73, and an electric driving mechanism for driving the movable roller support 73 to horizontally move back and forth is further provided.

The principle of use of the above embodiment is as follows:

when the device works, one extruder 52 extrudes TPU materials, the other three extruders 52 extrude PE materials, the materials enter the radial branch runners 51 through the corresponding feed inlets 5, the materials enter the starting points 40 of the spiral groove runners of the corresponding layer of annular gaps from the radial branch runners 51, then the materials flow and are distributed upwards in the spiral groove runners 4 of the annular gaps 3, as shown by arrows in figure 7, the materials of all layers are gradually and uniformly distributed in the circumferential direction of the annular gaps 3 and then are converged in the annular summarizing runner 12, wherein the TPU material layers are positioned at the outermost layer (or the innermost layer), the TPU layer and the three PE material layers are simultaneously extruded from the annular extrusion port 10 to form a film bubble 80 with four layers of composite layers (one layer is the TPU layer, the other three layers are the PE layers), the film bubble 80 is flattened by the herringbone clamping plate 6 and the traction clamping roller 61 to form a composite film material 8 which is connected end to end in the circumferential direction, the end-to-end composite membrane material 8 is slit by the slitting mechanism 9 in the longitudinal direction to form two superposed membrane sheets 83, and each membrane sheet 83 comprises a TPU layer and three PE layers, as shown in FIG. 1.

On the other hand, when the production is started and the composite film 8 is conveyed downstream by the pulling nip roller 61, the film storing mechanism 7 temporarily stores the composite film 8 (specifically, the horizontal distance between the fixed roller 71 and the movable roller 72 is pulled, for example, the state shown in fig. 2 is changed to the state shown in fig. 3, and the path of the composite film 8 is extended), so that a worker can easily separate the TPU layer and the PE layer at the front edge of the film sheet during the period, the TPU film 81 and the composite PE film 82 having three PE layers are formed after the separation, the TPU film 81 is guided to the TPU film winding shaft 91 for winding, the composite PE film 82 is guided to the PE film winding shaft 92 for winding, as shown in fig. 1, so that the TPU layer and the PE base layer can be peeled off on the composite production line, the adhesion force between the TPU layer and the PE base layer is small during the peeling, and the peeled PE base layer is actually a three-layer co-extruded PE film, compared with a single-layer PE film layer obtained in a traditional production mode, the tensile property of the single-layer PE film layer is greatly improved, so that the PE base layer 82 (a three-layer composite PE film) obtained after stripping basically cannot deform due to stretching, the intact form of the PE base layer 82 is kept, the PE base layer can be recycled as a normal PE film, and waste is avoided.

Claims (1)

1. A TPU film production line comprises a film blowing machine head, wherein the film blowing machine head is provided with an extrusion opening die, the extrusion opening die is provided with a circular ring-shaped gathering flow channel, the upper end of the circular ring-shaped gathering flow channel is a circular ring-shaped extrusion opening, a plurality of layers of circular ring-shaped sleeves which are sleeved with each other inside and outside and are concentrically arranged are arranged below the extrusion opening die, an annular gap is formed between every two adjacent internal and external circular ring-shaped sleeves, and the upper parts of the annular gaps of the layers are communicated and converged to the circular ring-shaped gathering flow channel; a plurality of spiral groove runners are formed in each layer of annular gap, the starting point of each spiral groove runner is located at the lower end of the annular gap, and the spiral groove runners of each layer of annular gap are uniformly distributed along the circumferential direction of the annular gap; each layer of annular gap is correspondingly provided with a feed inlet, a radial branch channel is arranged between each feed inlet and the starting point of the spiral groove channel of the corresponding layer of annular gap, and each feed inlet is correspondingly connected with an extruder; a herringbone clamping plate is arranged above the circular extrusion port, and a traction clamping roller is arranged above the herringbone clamping plate; the extrusion molding machine is characterized in that the number of layers of the annular sleeve is five, the number of layers of the annular gap is four, and the number of the extruders is four; the film storage mechanism comprises a plurality of fixed rollers and movable rollers, wherein each fixed roller is arranged into a vertical column, each movable roller is arranged into another vertical column, the vertical positions of the fixed rollers and the movable rollers are arranged in a cross way, and each movable roller is arranged on a movable roller bracket; and an electric driving mechanism for driving the movable roller bracket to horizontally move back and forth is also arranged.

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