阅读说明：本技术 钢丝绳的pvc涂覆装置及方法 (PVC coating device and method for steel wire rope ) 是由 蒋红俊 曹光明 蒋红兵 周江 周海东 陆树骏 于 2020-04-15 设计创作，主要内容包括：本发明提供一种钢丝绳的PVC涂覆装置,包括烘干机、加温区和模具,烘干机设置在加温区之前,与加温区连接,加温区设置在模具之前,与模具相连接,模具上设置有回流装置,还包括控制单元。钢丝绳的PVC涂覆方法,包括：(1)PVC原料的烘干；(2)PVC原料的逐步升温；(3)挤压涂覆。PVC塑料的熔融速度稳定,在到达模具时刚好熔融,涂覆包裹在钢丝绳上,次品率降低；PVC原料在进行加热熔融之前先进行了烘干,防止PVC原料因存在水分而产生鼓泡；模具内设置有压强传感器、阀门和回流装置,当模具内压强过大时,阀门打开,熔融的PVC原料流入回流装置,经回流装置滴回加温区内,解决在PVC塑料的涂覆过程容易产生鼓泡,造成涂塑表面不光滑,容易断裂的问题。(The invention provides a PVC coating device for a steel wire rope, which comprises a dryer, a heating area and a mold, wherein the dryer is arranged in front of the heating area and connected with the heating area, the heating area is arranged in front of the mold and connected with the mold, a reflux device is arranged on the mold, and the PVC coating device also comprises a control unit. A PVC coating method for steel wire ropes, comprising: (1) drying the PVC raw material; (2) gradually heating the PVC raw material; (3) and (4) extrusion coating. The PVC plastic has stable melting speed, is just melted when reaching a die, is coated and wrapped on the steel wire rope, and reduces the defective rate; the PVC raw material is dried before being heated and melted, so that bubbling of the PVC raw material due to the existence of moisture is prevented; the pressure sensor, the valve and the reflux device are arranged in the die, when the pressure in the die is too high, the valve is opened, the molten PVC raw material flows into the reflux device and drips back into the heating area through the reflux device, and the problems that bubbling is easily generated in the coating process of PVC plastics, the plastic-coated surface is not smooth and the plastic-coated surface is easily broken are solved.)

1. Wire rope's PVC coating device, its characterized in that: the drying machine is arranged in front of the heating area and connected with the heating area, the heating area is arranged in front of the mould and connected with the mould, and the mould is provided with a reflux device and a control unit.

2. The PVC coating apparatus for steel wire rope according to claim 1, characterized in that: a pressure sensor is arranged in the die, a valve is arranged on the backflow device, and the pressure sensor is connected with the valve.

3. The PVC coating apparatus for steel wire rope according to claim 2, characterized in that: the pressure sensor comprises a data acquisition unit and a data sending unit, the control unit comprises a data receiving unit, a data processing unit and an instruction sending unit, and the valve comprises an instruction receiving unit.

4. A PVC coating apparatus for steel wire rope according to claim 3, characterized in that: the pressure sensor comprises a pressure sensor, a data acquisition unit, a data processing unit, a valve instruction receiving unit and a valve instruction transmitting unit, wherein the data acquisition unit of the pressure sensor acquires pressure data and transmits the pressure data to the data transmitting unit, the data receiving unit of the control unit receives the pressure data of the data transmitting unit and transmits the pressure data to the data processing unit, the data processing unit processes the pressure data into an opening instruction or a closing instruction and transmits the opening instruction or the closing instruction to the instruction transmitting unit, and the instruction receiving unit of the valve receives the opening instruction or the closing instruction from the instruction transmitting unit.

5. The PVC coating apparatus for steel wire rope according to claim 1, characterized in that: the drying machine is sequentially provided with a winding device and a roller wheel, and the roller wheel and the winding device are arranged behind the die.

6. The PVC coating method of the steel wire rope is characterized by comprising the following specific steps:

step S1: drying the PVC raw material;

step S2: gradually heating the PVC raw material;

step S3: and (4) extrusion coating.

7. The PVC coating method for steel cord according to claim 6, characterized in that: the drying of the PVC raw material is realized through a dryer, and the moisture in the PVC raw material is dried.

8. The PVC coating method for steel cord according to claim 6, characterized in that: the gradual heating of the PVC raw material is realized through six heating areas, the temperatures of the six heating areas are respectively set to be 200 ℃, 210 ℃, 220 ℃, 230 ℃, 240 ℃ and 245 ℃, so that the PVC raw material is melted in the last heating area.

9. The PVC coating method for steel cord according to claim 6, characterized in that: the extrusion coating is realized through a die, molten PVC raw materials are sent into the die, and a steel wire rope passes through the center of the die.

10. The PVC coating method for steel cord according to claim 8, characterized in that: and a lead screw is arranged in the heating area to push the PVC raw material to move forwards.

Technical Field

The invention relates to the field of plastic-coated steel wire rope production equipment and a plastic-coated steel wire rope production method, in particular to a PVC coating device and a PVC coating method for a steel wire rope.

Background

The plastic-coated steel wire rope for the steel structure is made of plastic-coated steel wires and plastic-coated rope strands twisted or a steel wire rope with plastic coated on the surface, also called a plastic-coated steel wire rope, generally, the plastic-coated steel wire rope is made of a phosphatized coated steel wire rope, a galvanized steel wire rope, a stainless steel wire rope and a plain steel wire rope, the steel wire rope is subjected to outer-layer plastic coating treatment, generally PVC plastic coating treatment, the surface of the plastic-coated steel wire rope looks more attractive, the steel wire rope has a more stable structure, certain cushioning and anti-extrusion effects are achieved, and the service life of the steel wire rope can be prolonged.

The plastic-coated steel wire rope has outstanding corrosion resistance, and the corrosion resistance in the atmosphere, mine water and seawater is 3.5-5 times of the service life of a common galvanized steel wire rope. The plastic-coated steel wire rope has the advantages that the inner wire and the wire of the rope are separated from each other, and the strand are coated with the coating, so that the plastic-coated steel wire rope is good in wear resistance, can be used under carrying loads such as lifting and transportation, and is 1.5-2 times as long as that of a common steel wire rope. The plastic coated steel wire rope has good fatigue resistance, for example, the durability of the steel wire rope with the nylon coating and the nylon core is about 2 times that of the common hemp core or metal core steel wire rope.

The production of the plastic coated steel wire rope uses a special device, namely a plastic coating machine, the plastic coating machine gradually heats and softens PVC plastics, the molten PVC plastics are uniformly wrapped on the outer surface of the steel wire rope by matching with the running speed of a motor to the steel wire rope, and a special die is matched to finally form a smooth plastic coated surface.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a PVC coating device and method for a steel wire rope.

In order to achieve the purpose, the invention adopts the following technical scheme:

the PVC coating device for the steel wire rope comprises a dryer, a heating area and a mold, wherein the dryer is arranged in front of the heating area, the heating area is arranged in front of the mold, is connected with the heating area and is connected with the mold, and a reflux device is arranged on the mold.

Preferably, a pressure sensor is arranged in the mold, a valve is arranged on the reflux device, the pressure sensor is connected with the valve, when the pressure in the mold is too high, the valve is opened, the molten PVC raw material flows into the reflux device, and is dripped back into the heating area through the reflux device.

Preferably, the pressure sensor comprises a data acquisition unit and a data sending unit, the control unit comprises a data receiving unit, a data processing unit and an instruction sending unit, and the valve comprises an instruction receiving unit.

Preferably, the data acquisition unit of the pressure sensor acquires pressure data and transmits the pressure data to the data transmission unit, the data receiving unit of the control unit receives the pressure data of the data transmission unit and transmits the pressure data to the data processing unit, the data processing unit processes the pressure data into an opening instruction or a closing instruction and transmits the opening instruction or the closing instruction to the instruction transmission unit, and the instruction receiving unit of the valve receives the opening instruction or the closing instruction from the instruction transmission unit.

Preferably, a winding device and a roller are sequentially arranged in front of the dryer, and a roller and a take-up device are arranged behind the die. The steel wire rope moves forwards through the roller by the winding device, passes through the heating area, penetrates into the center of the die, is extruded and coated through the die to form the plastic-coated steel wire rope, and is naturally cooled, then passes through the roller and finally wound on the winding device.

The PVC coating method of the steel wire rope by using the PVC coating device comprises the following specific steps:

step S1: drying the PVC raw material;

step S2: gradually heating the PVC raw material;

step S3: and (4) extrusion coating.

Preferably, the drying of the PVC raw material is realized by a dryer, and the moisture in the PVC raw material is dried to prevent the PVC raw material from bubbling due to the moisture.

Preferably, the gradual heating of the PVC raw material is realized through six heating areas, the temperatures of the six heating areas are respectively set to be 200 ℃, 210 ℃, 220 ℃, 230 ℃, 240 ℃ and 245 ℃, so that the PVC raw material is melted in the last heating area. The steel wire rope is prevented from being wrapped with PVC when moving forwards in a heating area, so that the coating is not uniform.

Preferably, the extrusion coating is carried out by means of a die into which molten PVC stock is fed, the steel cord being passed through the die at a central location.

Preferably, a lead screw is arranged in the heating area to push the PVC raw material to move forwards.

Preferably, after the extrusion coating step is completed, the steel wire rope moves forwards, and is wound on a take-up device through a roller after being naturally cooled.

Compared with the prior art, the invention has the beneficial effects that:

1. the PVC plastic has stable melting speed, is just melted when reaching a die, is coated and wrapped on the steel wire rope, and reduces the defective rate of the plastic-coated steel wire rope;

2. the PVC raw material is dried before being heated and melted, so that bubbling of the PVC raw material due to the existence of moisture is prevented;

3. the pressure sensor, the valve and the reflux device are arranged in the die, when the pressure in the die is too high, the valve is opened, the molten PVC raw material flows into the reflux device and drips back into the heating area through the reflux device, and the problems that bubbling is easily generated in the coating process of PVC plastics, the plastic-coated surface is not smooth and the plastic-coated surface is easily broken are solved.

Drawings

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

FIG. 2 is an enlarged schematic view of the structure at the point A in the embodiment 1 of the present invention;

FIG. 3 is a control system configuration diagram according to embodiment 1 of the present invention;

FIG. 4 is a flow chart of the PVC plastic coating method of example 1 of the present invention;

fig. 5 is a schematic top view of the heating zone in embodiment 1 of the present invention.

Detailed Description

In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.

Referring to fig. 1, the PVC coating apparatus for a steel wire rope comprises a dryer 1, a heating area 2 and a mold 3, wherein the dryer 1 is arranged in front of the heating area 2 and connected with the heating area 2, the heating area 2 is arranged in front of the mold 3 and connected with the mold 3, and the mold 3 is provided with a reflux device 4 and a control unit 5.

Referring to fig. 2, a pressure sensor 6 is arranged in the mold 3, a valve 7 is arranged on the reflux device 4, the pressure sensor 6 is connected with the valve 7, when the pressure in the mold 3 is too high, the valve 7 is opened, the molten PVC raw material flows into the reflux device 4, and is dripped back into the heating area 2 through the reflux device 4.

Referring to fig. 3, the pressure sensor 6 includes a data acquisition unit 601 and a data transmission unit 602, the control unit 5 includes a data receiving unit 501, a data processing unit 502 and an instruction transmission unit 503, and the valve 7 includes an instruction receiving unit 701.

Referring to fig. 3, the data acquisition unit 601 of the pressure sensor 6 acquires pressure data and transmits the pressure data to the data transmission unit 602, the data receiving unit 501 of the control unit 5 receives the pressure data from the data transmission unit 602 and transmits the pressure data to the data processing unit 502, the data processing unit 502 processes the pressure data into an on instruction or an off instruction and transmits the on instruction or the off instruction to the instruction transmission unit 503, and the instruction receiving unit 701 of the valve 7 receives the on instruction or the off instruction from the instruction transmission unit 503.

Referring to fig. 1, a winding device 8 and a roller 9 are sequentially disposed in front of the dryer 1, and a roller 9 and a take-up device 10 are disposed behind the mold 3. The steel wire rope moves forwards through a roller 9 by a winding device 8, passes through a heating area 2, penetrates into the center of a die 3, is extruded and coated through the die 3 to form a plastic-coated steel wire rope, and is naturally cooled, then passes through the roller 9 and finally is wound on a winding device 10.

Referring to fig. 4, the PVC coating method of the steel wire rope using the PVC coating apparatus includes the following steps:

step S1: drying the PVC raw material;

step S2: gradually heating the PVC raw material;

step S3: and (4) extrusion coating.

Specifically, the drying of the PVC raw material is realized through the dryer 1, and the moisture in the PVC raw material is dried, so that the bubbling of the PVC raw material due to the moisture is prevented.

With further reference to fig. 1, the gradual heating of the PVC raw material is realized by six heating zones 2, and the temperatures of the six heating zones 2 are respectively set to 200 ℃, 210 ℃, 220 ℃, 230 ℃, 240 ℃ and 245 ℃, so that the PVC raw material is melted in the last heating zone 2. The steel wire rope can not be wrapped with PVC when moving forwards in the heating area 2, so that the coating is not uniform.

With further reference to fig. 1, the extrusion coating is carried out by means of a die 3, into which die 3 molten PVC material is fed, and through which die 3 a steel cord is passed.

Referring to fig. 5, a screw 11 is disposed in the heating region 2 to push the PVC material to move forward.

Referring further to fig. 1, after the extrusion coating step, the steel wire rope moves forward, and after natural cooling, the steel wire rope is wound on a take-up device 10 through a roller 9.

The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. Rather, it is intended that all such modifications and variations be included within the spirit and scope of this invention.