PVC film extrusion cooling line

Abstract

The utility model discloses a PVC (polyvinyl chloride) film extrusion cooling line which comprises a cooling tank and a bracket, the whole support is a rectangular frame, the cooling tank is fixedly installed in the support, and the top of the cooling tank is open. A plurality of cooling rollers are uniformly arranged in the cooling tank at intervals; the cooling roller comprises a roller cylinder and a roller core, the roller cylinder is fixedly arranged on the roller core in a sleeving mode, the two ends of the roller cylinder are sealed, and an oil inlet runner and an oil return runner are formed in the left end and the right end of the roller core correspondingly. The roller is divided into an outer-layer roller body and an inner-layer roller body, and a spiral cooling flow channel is arranged between the outer-layer roller body and the inner-layer roller body; wherein the oil inlet flow channel is communicated with the left end of the cooling flow channel, and the right end of the oil return flow channel is communicated with the oil return flow channel; according to the utility model, a plurality of groups of cooling rollers are adopted, so that the PVC film is in a tensioned state, and meanwhile, the PVC film can be supported, so that the PVC film which is just extruded is prevented from being shrunk.

Description

Technical Field

[0001] The utility model relates to the field of plastic film preparation, in particular to a PVC film extrusion cooling line. Background Art

[0002] The main component of PVC is polyvinyl chloride, which is slightly yellow and translucent and shiny. It is more transparent than polyethylene and polypropylene, but less transparent than polystyrene. Depending on the amount of additives used, it is divided into soft and hard polyvinyl chloride. Soft products are soft and tough, and feel sticky. The hardness of hard products is higher than that of low-density polyethylene, but lower than that of polypropylene, and whitening will occur at the bends. Common products: plates, pipes, soles, toys, doors and windows, wire sheaths, stationery, etc. It is a polymer material that uses a chlorine atom to replace a hydrogen atom in polyethylene. The PVC film needs to be cooled after extrusion.

[0003] For example, the patent with authorization announcement number CN212331620U previously applied by our company discloses a calendering film cooling device, which belongs to the field of cooling technology and includes a base, a box body is installed on the top of the outer wall of the base, a condenser is installed on the top of the box body, a conduit is installed at the output end of the condenser and the conduit passes through the top of the box body, a condensation outlet is installed at one end of the conduit and the condensation outlet is located at the top of the inner wall of the box body, a fixed box is installed on the right side of the top of the base, a motor is installed on the inner wall of the fixed box, a connector is installed at the output end of the motor and the connector passes through the top of the fixed box, a rotating drum is installed on the top of the connector, and a groove is opened on the top of the rotating drum.

[0004] The above patent can cool the calendered film on a large scale by cooperating with each other through the box, condenser and condensation outlet, and can increase the practicality of storing the calendered film by cooperating with each other through the motor, rotating drum and T-shaped cover plate, and is suitable for being widely promoted and used; however, the disadvantage of the above patent is that when the film material is cooled inside the box, the film material lacks a shaping mechanism, which causes irregular shrinkage of the film material, thereby resulting in a decrease in the quality of the finished product.

[0005] Therefore, it is necessary for us to improve such a structure to overcome the above-mentioned defects. Utility Model Content

[0006] The purpose of the utility model is to provide a PVC film extrusion cooling line to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A PVC film extrusion cooling line comprises a cooling trough and a bracket; the bracket is in the shape of a rectangular frame as a whole and the cooling trough is fixedly installed inside the bracket, and the top of the cooling trough is opened; a plurality of cooling rollers are evenly spaced in the cooling trough; the cooling roller comprises a roller and a roller core, the roller is fixedly sleeved on the roller core, and both ends of the roller are sealed, and the left and right ends of the roller core are respectively provided with an oil inlet channel and an oil return channel; the roller is divided into an outer layer cylinder and an inner layer cylinder, wherein a spiral cooling channel is arranged between the outer layer cylinder and the inner layer cylinder; wherein the oil inlet channel is connected to the left end of the cooling channel, and the right end of the oil return channel is connected to the oil return channel.

[0009] Furthermore, an oil inlet branch pipe and an oil return branch pipe are extended outward along the radial direction on the roller core, and the two ends of the oil inlet branch pipe are respectively connected to the left end of the cooling channel and the oil inlet channel; the two ends of the oil return branch pipe are respectively connected to the right end of the cooling channel and the oil return channel.

[0010] Furthermore, a drainage pipe is provided on one side of the bottom of the cooling tank.

[0011] Furthermore, at least three cooling rollers are provided.

[0012] Furthermore, both ends of the roller core are rotatably arranged in a bearing seat through bearings, and the bearing seat is fixedly mounted on the bracket.

[0013] Furthermore, a power device is also provided on one side of the bracket, and the power device includes a driving motor and a chain transmission mechanism, and the driving motor drives the roller core connected to the cooling roller through the chain transmission mechanism.

[0014] Furthermore, the chain transmission mechanism includes a driving sprocket, a driven sprocket and a transmission chain, wherein the driving sprocket is fixedly mounted on the output shaft of the driving motor, the driven sprocket is fixedly mounted on the left end of the roller core, and the transmission chain is connected between the driving sprocket and the driven sprocket.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The double-layer roller setting is conducive to reducing the weight of the cooling roller. At the same time, the spiral cooling channel is conducive to the cooling medium staying time in the roller, thereby enhancing the cooling effect.

[0017] At the same time, multiple groups of cooling rollers are used to keep the PVC film in a tensioned state, and at the same time, they can also support the PVC film and prevent the newly extruded PVC film from shrinking. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the PVC film extrusion cooling line.

[0019] Figure 2 Front view of the PVC film extrusion cooling line.

[0020] Figure 3 Side view of a PVC film extrusion cooling line.

[0021] Figure 4 Top view of the PVC film extrusion cooling line.

[0022] Figure 5 for Figure 3 Sectional view along AA direction

[0023] Figure 6 It is a schematic diagram of the PVC film passing through the PVC film extrusion cooling line in this embodiment. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0025] See also Figure 1-5 , a PVC film extrusion cooling line, comprising a cooling trough 1 and a bracket 2; the bracket 2 is a rectangular frame as a whole and the cooling trough 1 is fixedly installed inside the bracket 2, the top of the cooling trough 1 is opened, and a drain pipe 101 is connected to one side of the bottom of the cooling trough 1;

[0026] A plurality of cooling rollers 3 are evenly spaced in the cooling tank 1, and at least three cooling rollers 3 are provided; the cooling roller 3 comprises a roller 301 and a roller core 302, the roller 301 is fixedly sleeved on the roller core 302, and both ends of the roller are sealed, and the left and right ends of the roller core 302 are respectively provided with an oil inlet channel 303 and an oil return channel 304;

[0027] The roller 301 is divided into an outer layer cylinder 305 and an inner layer cylinder 306, wherein a spiral cooling channel 307 is arranged between the outer layer cylinder 305 and the inner layer cylinder 306; wherein the oil inlet channel 303 is connected with the left end of the cooling channel 307, and the right end of the oil return channel 304 is connected with the oil return channel 304,

[0028] Specifically, an oil inlet branch pipe 308 and an oil return branch pipe 309 are provided on the roller core 302 extending outward along the radial direction, and the two ends of the oil inlet branch pipe 308 are respectively connected to the left end of the cooling channel 307 and the oil inlet channel 303; the two ends of the oil return branch pipe 309 are respectively connected to the right end of the cooling channel 307 and the oil return channel 304;

[0029] In this embodiment, a power device 4 is further provided on one side of the bracket 2. The power device 4 includes a driving motor 401 and a chain transmission mechanism 402. The driving motor 401 drives a roller core 302 connected to the cooling roller 3 through the chain transmission mechanism 402.

[0030] Specifically, the chain transmission mechanism 402 includes a driving sprocket 403, a driven sprocket 404 and a transmission chain 405, wherein the driving sprocket 403 is fixedly mounted on the output shaft of the driving motor 401, the driven sprocket 404 is fixedly mounted on the left end of the roller core 302, and the transmission chain 405 is transmission-connected between the driving sprocket 403 and the driven sprocket 404;

[0031] The utility model adopts the roller core 302 with a double-layer roller, which is beneficial to reducing the weight of the cooling roller 3. At the same time, the spiral cooling channel is used, which is beneficial to the cooling medium staying time in the roller 301, thereby enhancing the cooling effect.

[0032] like Figure 6 As shown, the PVC film to be cooled just extruded passes through the cooling roller; when the utility model is used, the two ends of the roller core 302 are connected to the water inlet and the water return port of the chiller through a rotary joint and a pipeline respectively, and the cold water provided by the chiller enters the cooling channel 307 from the oil inlet branch pipe 308 to achieve the cooling of the roller surface, and the return water after the PVC film is heated is discharged through the oil return channel 304; and the cooled roller can cool the just extruded PVC passing through the surface of the cooling roller;

[0033] In this solution, both ends of the roller core 302 are rotatably arranged in the bearing seat 201 through bearings, and the bearing seat 201 is fixedly mounted on the bracket 2.

[0034] In the description of the present utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the equipment or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "connection" and the like should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

Claims

1. PVC film extrusion cooling line, including cooling trough and bracket; characterized in that: The bracket is in the shape of a rectangular frame as a whole and the cooling groove is fixedly installed inside the bracket, and the top of the cooling groove is opened; a number of cooling rollers are evenly spaced in the cooling groove; the cooling roller includes a roller and a roller core, the roller is fixedly sleeved on the roller core, and both ends of the roller are sealed, and the left and right ends of the roller core are respectively provided with an oil inlet channel and an oil return channel; the roller is divided into an outer cylinder and an inner cylinder, wherein a spiral cooling channel is arranged between the outer cylinder and the inner cylinder; wherein the oil inlet channel is connected to the left end of the cooling channel, and the right end of the oil return channel is connected to the oil return channel.

2. The PVC film extrusion cooling line according to claim 1, characterized in that: An oil inlet branch pipe and an oil return branch pipe are extended outward along the radial direction on the roller core, and the two ends of the oil inlet branch pipe are respectively connected to the left end of the cooling channel and the oil inlet channel; the two ends of the oil return branch pipe are respectively connected to the right end of the cooling channel and the oil return channel.

3. The PVC film extrusion cooling line according to claim 1, characterized in that: A drainage pipe is provided on one side of the bottom of the cooling tank.

4. The PVC film extrusion cooling line according to claim 1, characterized in that: At least three cooling rollers are provided.

5. The PVC film extrusion cooling line according to claim 1, characterized in that: The two ends of the roller core are rotatably arranged in the bearing seat through bearings, and the bearing seat is fixedly installed on the bracket.

6. The PVC film extrusion cooling line according to claim 1, characterized in that: A power device is also provided on one side of the bracket, and the power device includes a driving motor and a chain transmission mechanism. The driving motor drives the roller core connected to the cooling roller through the chain transmission mechanism.

7. The PVC film extrusion cooling line according to claim 6, characterized in that: The chain transmission mechanism includes a driving sprocket, a driven sprocket and a transmission chain, wherein the driving sprocket is fixedly mounted on the output shaft of the driving motor, the driven sprocket is fixedly mounted on the left end of the roller core, and the transmission chain is connected between the driving sprocket and the driven sprocket.

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