JP2021070010A - Release agent applying roller - Google Patents

Abstract

To provide a release agent applying roller that is a part of components of a belt conveyer, forms a thick release agent coating on a traveling conveyer belt, and prevents adhesion of a carried article.SOLUTION: In rollers used for traveling a belt of a belt conveyer or assisting the traveling, a release agent applying roller is composed of a release agent supplying portion also functioning as a rotation axis, a release agent storing portion, and a roller outer shell portion. The release agent supplying portion is equipped with a release agent supplying channel and a release agent supplying port on a rotary axis line. The release agent storing portion is formed into a cylindrical shape, and is equipped with small holes for discharging a release agent to the roller outer shell portion on a wall portion of the cylinder. The release agent is generally uniformly impregnated in the roller outer shell portion in advance.SELECTED DRAWING: Figure 3

Description

The present invention relates to a technique for effectively preventing a transported object from adhering to a belt or a roller by using a roller attached to the belt conveyor when the powder or granular material is conveyed by the belt conveyor.

Belt conveyors are widely used in all industries as the most versatile means of transportation in physical distribution, and conveyors are large and heavy objects from powder and granules such as sand and cement, which are the raw materials used for sand molds during casting. Is widely handled. The basic configuration of a belt conveyor is a belt for loading objects, a pulley that applies driving force to the belt to run it, a roller that prevents the belt from meandering and assists in stable running, and powder. A hopper for supplying granules. Most of the transport directions are diagonally upward or horizontal.

When handling powders and granules, if the transported material contains water, it may snowball on the belt, pulley or roller, or it may fall on the return process (return process) without being discharged at the carry-out section (conventional minerals). This is a phenomenon that often occurs when the raw material is transported as a raw material, so it is called a fallen ore.) In particular, when the conveyed object is conveyed diagonally upward, gravity acts in the direction in which the conveyed object is reversed, that is, in the direction in which the conveyed object is compressed and pressed against the belt, so that the conveyed object is likely to adhere to the belt. The adhering material generally falls under the belt immediately after crossing the conveyor head (end on the discharge side) and turning to the return stroke, and the amount of the fall is the middle of the conveyor return side or the conveyor tail (supply side). It is known that the amount of transportation reaches 10 times or more that of the end of the conveyor belt.

If the transported object adheres to the surface of the belt, the transport efficiency will decrease due to the fall of mines and the re-transported object attached to the belt, and the durability of the belt will also decrease due to cracks caused by the extra load on the belt. .. Further, when the conveyed object adheres to the pulley or roller, the conveying efficiency is lowered due to the meandering or slipping of the belt, and the belt strongly abuts and rubs, causing wear on the pulley or roller, and the pulley or roller is replaced. The frequency increases. In particular, the pulley transmits the driving force, and the snub pulley is subjected to pressing pressure to maintain the tension of the belt, which is troublesome to replace.

Therefore, it is necessary to frequently clean the belt, pulley and roller. In addition, the floor surface needs to be cleaned because the transported matter is scattered around the belt conveyor and the working environment is deteriorated due to the falling mine. The powder or granular material that has once become clay-like and solidified is firmly fixed to the belt, pulley, and roller, and needs to be peeled off with a strong force using a scraper or a brush, which requires a large amount of labor. At the site, there are many cases where each part is cleaned while the belt conveyor is in operation, which is dangerous. Also, a large amount of water is required when rubbing with a brush. Therefore, reduction of time and cost for maintenance and ensuring safety have been important issues.

Patent Document 1 discloses a prior art that has worked on solving the problem of adhesion to a belt as in the case of powder or granular material. In the prior art, the adhesively processed product adhering to the main conveyor is surely peeled off and guided to the next process, and the main conveyor is also cleaned at the same time to reduce the degree of adhering of the product to the main conveyor. An object of the present invention is to provide a product peeling device for a core material adhesive machine, and a roller outer cylinder capable of impregnating liquid, which comes into contact with a conveyor belt of a main conveyor and rotates opposite to the feeding direction of the conveyor belt, and the roller. The solution is attempted by equipping the outer cylinder with a supply means for supplying the release agent from the inside.

Further, the inventors of the present application have an object of providing a method for preventing the particles from adhering to the transport surface of the conveyor, and while the conveyor is operating to transport the particles such as foundry sand on the conveyor. The solution is to apply a lubricant that makes it difficult for particles to adhere to the conveyor surface, either directly or via a roller that is in contact with the conveyor surface of the power transmission mechanism that transmits the driving force to the conveyor. The technique to be achieved is disclosed in Patent Document 2.

In addition, although it is not a belt conveyor, a prior art for changing the coating range of the coating roller (Patent Document 3) and a prior art for adjusting the coating amount per unit area of the coating roller (Patent Document 4) are disclosed.

Jikkai Sho 60-133861 Japanese Unexamined Patent Publication No. 10-59523 Japanese Unexamined Patent Publication No. 2004-321846 Japanese Unexamined Patent Publication No. 2014-23998

In Patent Document 1, the roller outer cylinder supplies a mold release agent from the inside and is applied to the belt, and also has a rotation drive mechanism itself, and rotates in the direction opposite to the moving direction in a state of being in contact with the belt. It also has the function of directly peeling off the bonded product adhering to the main conveyor. Therefore, the roller wears severely and the frequency of replacement increases. Since it has a drive mechanism, it takes time to replace it. Further, since the product as a transported object strongly hits the roller outer cylinder, the amount of the release agent oozing out from the portion is different from the portion not in contact with the roller outer cylinder. In that case, the film thickness of the release agent applied to the belt differs depending on each part of the belt, and there is a problem that the effect of the release agent is not stable.

Further, although the roller outer cylinder is made of foamed resin, bubbles are generated irregularly in the manufacturing process of foaming to form the roller shape, so that the formation state of bubbles is different at each location, and the mold release agent. When exuding to the surface, a state may occur in which the roller surface cannot be uniformly exuded, and there is a problem that a film having a stable film thickness cannot be formed. In addition, the mold release agent extruded from the small through hole formed in the shaft tube inside the foamed resin linearly flows inside the foamed resin in the direction of the outer periphery of the roller, which is the direction in which pressure is mainly applied (in the radial direction of the outer cylinder of the roller). ) There is a problem that it is not possible to form a film having a constant thickness on the belt because there is a tendency for the roller to move and a difference in the amount of seepage occurs in each part of the roller surface due to this.

In Patent Document 2, since the thin film formed by spraying and applying a mold release agent on the roller from the outside is transferred to the belt, it is pressed against the belt loading surface side such as a snub pulley or a bend pulley to maintain the tension of the belt. If the release agent is not applied to the rollers, the state of contact with the belt may change due to the vibration or meandering of the belt, and uneven transfer may occur. Further, in a short-distance transport belt conveyor that does not require a roller to press the belt loading surface side to maintain the tension of the belt, the coating is applied by spraying directly on the belt, but it is also caused by the vibration and meandering of the belt. Coating unevenness may occur.

Patent Documents 3 and 4 aim to apply a liquid to a fixed surface, and do not assume that a stable film thickness is formed on a traveling surface such as a conveyor belt. .. The coating roller of Patent Document 3 has a complicated structure, has a large number of constituent parts, and is expensive. Further, the coating roller of Patent Document 4 requires a device for controlling the pressurization or suction of the supplied liquid, which is expensive.

The present invention has been made in view of the above problems, and although it is a part of a belt conveyor component, a mold release agent film having a uniform thickness is formed on a traveling conveyor belt to prevent the transported object from adhering. It is an object of the present invention to provide a release agent application roller for prevention. A second object of the present invention is to provide a release agent coating roller having a simple structure and easy to replace.

In order to solve the above problems, the release agent application roller according to the present invention is a roller used for running the belt of the belt conveyor or for assisting the running, and the roller is released which also serves as a rotation axis. It is composed of a mold agent supply unit, a mold release agent storage unit, and a roller outer shell portion, and the mold release agent supply unit in the previous term is provided with a mold release agent supply flow path and a mold release agent supply port on the rotation axis. The release agent storage portion is formed in a tubular shape, the wall portion of the cylinder is provided with a small hole for discharging the release agent to the roller outer shell portion, and the release agent is previously formed in the roller outer shell portion. Is impregnated substantially uniformly.

Further, the release agent application roller according to the present invention is characterized in that a capillary tubular release agent discharge flow path is formed inside the outer shell portion of the roller when the release agent is impregnated in advance.

Further, in the release agent application roller according to the present invention, a plurality of sets of the small holes arranged at equal intervals around the rotation axis are arranged in the wall portion of the release agent storage portion. It is characterized by being installed.

Further, the release agent coating roller according to the present invention is characterized in that a set of adjacent small holes has a phase difference around the rotation axis.

Further, in the release agent application roller according to the present invention, the density when a plurality of the small holes are provided in the wall portion of the release agent storage portion decreases from the center of the cylinder toward both ends of the cylinder. It is characterized in that it is set as follows.

Further, the release agent coating roller according to the present invention is characterized in that the area of one small hole is set small from the center of the cylinder toward both ends of the cylinder.

Further, the release agent application roller according to the present invention is characterized in that the outer shell portion of the roller is a return roller that assists the running of the belt and is a crown type having a bulge in the central portion of the cylinder. ..

According to the release agent application roller of the present invention, by adopting a method in which the release agent is exuded from the inside of the roller and applied to the belt, the release agent is uniformly applied only by bringing the roller into contact with the belt. It has the effect of being able to be applied to. Further, by impregnating the foamed resin of the roller outer shell portion with the mold release agent in advance, the mold release agent discharged by the supply pressure from the small holes of the mold release agent storage portion is evenly diffused in the foamed resin. When the roller rotates, the centrifugal force and the capillary phenomenon combine to seep out from the entire surface of the outer shell of the roller almost uniformly. Therefore, the release agent can be supplied at a constant pressure, and there is no need to control the pressure. Play.

According to the release agent application roller of the present invention, by arranging small holes at equal intervals around the rotation axis on the release agent storage cylinder, the release agent is uniformly arranged in the circumferential direction of the roller outer shell. Has the effect of being able to discharge.

According to the release agent coating roller of the present invention, the degree of dispersion of the release agent discharge with respect to the roller outer shell portion is provided by providing a phase difference between a set of adjacent small holes (hereinafter referred to as a small hole set). It has the effect of improving the uniformity of release of the release agent to the outer shell of the roller.

In the belt conveyor, in order to carry out stable transportation, the conveyed objects are set to gather near the center of the belt, so that the roller of the belt conveyor has a large load on the roller outer shell portion near the center of the rotating shaft. The mold release agent discharged from the small holes tends to move to both ends perpendicular to the belt traveling direction as it approaches the surface of the outer shell of the roller due to the load. Therefore, when the release agent is discharged by arranging small hole sets at equal intervals from the central portion in the longitudinal direction of the cylinder of the release agent storage portion in the direction of both ends, the coating film thickness on both ends of the belt tends to be thick. According to the release agent coating roller of the present invention, by setting the density of the small holes to be small from the central portion in the longitudinal direction of the cylinder to both ends, the release agent approaches the surface of the outer shell of the roller with respect to the belt traveling direction. It has the effect of making the coating film thickness substantially uniform by utilizing the tendency to move to both vertical ends.

According to the release agent coating roller of the present invention, by setting the area of one small hole small from the central portion in the longitudinal direction of the cylinder to both ends, the small hole in the release agent storage portion from the central portion in the longitudinal direction to both ends is set. Even when the sets are arranged at equal intervals and the release agent is discharged, the same effect as when the density of small holes of the same area is set smaller from the central part in the longitudinal direction of the cylinder toward both ends is exhibited, and the coating is applied. It has the effect of making the film thickness almost uniform.

According to the release agent application roller of the present invention, by adopting a method in which the release agent is exuded from the inside of the roller and applied to the belt, the roller only needs to be in contact with the belt and is attached to the belt. In a conveyor having a short transport distance that does not require tension, the effect of the release agent coating roller can be obtained by arranging the release agent coating roller of the present invention in close contact with the belt transport surface side. Alternatively, a conveyor having a long transport distance can be applied to a vibration or meandering prevention roller that does not need to be loaded with power. Therefore, it can be applied to a return roller, and it has an effect that it can be easily replaced when the foamed resin of the roller outer shell is worn. The return roller forms a crown shape with a bulging central part of the rotating shaft to prevent the belt from meandering, so it is possible to stably apply the release agent to the central part where the transported object is particularly present. It has the effect of becoming.

It is a schematic diagram which showed the general belt conveyor 50. It is a front view which showed the mold release agent coating roller 1 which concerns on this invention. It is sectional drawing of the mold release agent coating roller 1 which concerns on this invention. It is a schematic diagram which showed the flow of the mold release agent in the roller which discharges a mold release agent from the inside, and applies it to a belt 60. FIG. 3 is an enlarged cross-sectional view taken along the line AA'in FIG. It is a schematic diagram which showed an example of the flow of the release agent in the release agent application roller 1 which concerns on this invention. It is a schematic diagram which showed an example which provided the phase difference between the group of the small hole group 141 provided in the release agent storage part 10. It is a schematic diagram which showed an example which changed the density of the small hole 14 provided in the release agent storage part 10. It is a schematic diagram which showed another example of the flow of the release agent in the release agent application roller 1 which concerns on this invention. It is a schematic diagram which showed an example which changed the area of the small hole 14 provided in the release agent storage part 10. It is a schematic diagram which showed an example which changed the area and density of the small hole 14 provided in the release agent storage part 10.

A mode for carrying out the release agent coating roller 1 according to the present invention will be described with reference to the drawings.

FIG. 1 is a schematic view showing a general belt conveyor 50. An example of the belt conveyor 50 having a long transport distance is shown. The belt conveyor 50 generally includes a belt 60, a power unit (not shown), a head pulley 80, a tail pulley 82, a snub pulley 84, a tension pulley 86, a bend pulley 88, an impact carrier roller 74, a carrier roller 72, and a return roller 70,702. It is composed of a presser roller 76, a hopper 90, and the like.

The head pulley 80, also called a drive pulley, is a belt wheel that is arranged at the end on the side of discharging the conveyed object and transmits the power of the power device to the belt 60. The tail pulley 82 is a belt wheel that forms a transport path in pairs with the head pulley 80, and is arranged at the end on the transport object introduction side. The snub pulley 84 is arranged in the vicinity of the head pulley 80 or the tail pulley 82 to push up the belt 60 and adjust and maintain the angle at which the belt 60 is wound around the head pulley 80 or the tail pulley 82, and is also called a snap pulley. The tension pulley 86 is a belt wheel that is arranged by moving the rotation axis from the path of the belt 60 in order to absorb the elongation and slack of the belt 60 and apply an appropriate tension. The bend pulley 88 is a belt wheel arranged to bend the path of the belt 60. The impact carrier roller 74 is a roller that softens the impact of dropping at a place (referred to as an impact portion) where a transported object falls, such as a hopper 90 or a chute port. The carrier roller 72 is a roller that supports the belt 60 on the transport side, and is often arranged so that the center of the belt 60 is recessed so that the transported object can be easily loaded, and is also called an idler. The return rollers 70 and 702 are rollers that support the belt 60 on the return side in order to prevent meandering and vibration of the belt 60 and assist stable running. Since the return rollers 70 and 702 are supported from the vertically downward direction, they come into contact with the transport surface. The presser roller 76 is used to hold the track of the formed belt conveyor.

FIG. 2 is a front view showing the release agent coating roller 1 according to the present invention. The release agent application roller 1 shown in FIG. 2 is an example applied to a Western barrel-shaped crown type return roller having a bulge in the central portion of the cylinder. In the belt conveyor 50 shown in FIG. 1, it is effective to apply the release agent coating roller 1 according to the present invention to the return roller 70 immediately after the snub pulley 84. By newly applying the release agent to the belt 60 in which the release agent is peeled off from the surface immediately after discharging the conveyed object, the conveyed object adheres to the pulley or roller in contact with the belt 60 transport surface in the return stroke. Can be prevented. Further, by adopting the release agent application roller 1 for the return roller close to the tail pulley 82, even if the release agent is applied again to the thinned release agent film transferred to the pulley or roller in the return process, the release agent can be applied again. Good.

The release agent coating roller 1 includes a rotating shaft 30 and is rotatably configured. Therefore, the release agent application roller 1 contacts the belt 60, rotates about the rotating shaft 30 as the belt 60 travels, and applies the release agent that seeps out from the roller outer shell portion 20 to the belt 60. Many of the return rollers form a crown shape in which the central portion of the rotating shaft 30 is bulged, and it is possible to stably apply the release agent to the central portion where the transported object is particularly present, and the belt 60. When the roller outer shell portion 20 is worn due to contact with the roller, it can be easily replaced.

Further, although the belt conveyor 50 for short-distance transport does not usually come with a return roller that prevents the belt 60 from meandering or vibrating, the belt conveyor 50 is provided with a receiving port for a return roller rotating shaft having a simple structure to release a mold release agent. Simply by bringing the coating roller 1 into contact with the belt 60 and attaching it, it can rotate according to the running of the belt 60 and apply the mold release agent, and it is possible to prevent the adherence of the transported material and the fall of minerals, so that it can be transported over a short distance. It can also be effectively applied to the belt conveyor 50 for use.

FIG. 3 is a cross-sectional view of the release agent coating roller 1 according to the present invention. The release agent application roller 1 is composed of a release agent supply unit 12, a release agent storage unit 10, and a roller outer shell portion 20. The release agent supply unit 12 includes a release agent supply flow path 124 and a release agent supply port 122 on the rotation axis AR. The release agent supply flow path 124 penetrates the center of the release agent application roller 1 in the direction of the rotation axis AR and also serves as the rotation shaft 30. By penetrating the rotating shaft, shaft shake during rotation is prevented. Therefore, for example, the release agent application roller 1 applied to the return roller 70 can be mounted only by fitting it into the receiving port provided in the belt conveyor 50. The release agent can be supplied by attaching a pipe (not shown) or the like as a flow path for supplying the release agent from the storage tank or the like to the release agent supply port 122 with one touch. The release agent is supplied by applying pressure using a compressor, a pump, or the like. A space for the release agent storage portion 10 is formed on the outside of the release agent supply flow path 124. When the release agent leaves the pipe and is introduced into the release agent application roller 1, the space near the release agent storage unit 10 becomes large due to the pressure drop and gravity near the entrance of the release agent storage unit 10. It may hang down and not reach the farthest point from the release agent supply port 122. Therefore, the release agent supply flow path 124 is formed with the same cross-sectional area from the inlet of the release agent storage section 10 to the farthest point, and is discharged to the release agent storage section 10 on the way. It is provided with at least one hole 126.

The release agent storage portion 10 outside the release agent supply flow path 124 is formed in a tubular shape, and a plurality of small mold release agents for supplying the release agent to the roller outer shell portion 20 on the wall portion 102 of the cylinder. It is provided with a hole 14. A plurality of small holes 14 are arranged as a set of a plurality of small holes 14 arranged at equal intervals around the rotation axis AR. The cylinder of the release agent storage portion 10 and the roller outer shell portion 20 are integrally formed. The release agent supply unit 12 is connected by a bearing such as a bearing, and when the belt 60 is running, the release agent storage unit 10 and the roller outer shell portion 20 rotate synchronously with the release agent supply flow path 124 as an axis. To do. The shape of the cylinder of the release agent storage unit 10 may be a cylinder or a polygonal cylinder.

When the belt 60 is running, the supply pressure applied when supplying the release agent, the centrifugal force when the cylinder of the integrated release agent storage portion 10 and the roller outer shell portion 20 rotate, and the capillary phenomenon are combined. The mold release agent seeps out from the roller outer shell portion 20.

As the material of the roller outer shell portion 20 that covers the outside of the release agent storage portion 10, a porous resin or metal is used. Examples of the porous resin include foamed resin (foamed plastic) and plastic sintered porous body. Examples of metals include sintered metals. Sintering means that when an aggregate of solid powder is heated at a temperature lower than the melting point, the powder solidifies into a dense sintered body. By controlling the temperature or time conditions at the time of sintering, it is possible to produce a porous sintered body having bubbles. The foamed plastic is a lightweight porous body having a large number of bubbles inside, which is obtained by adding a foaming agent such as a bicarbonate, a gas, or a liquid having a low boiling point to a plastic such as polyethylene or polyurethane and heat-molding it. Since the roller outer shell portion 20 comes into contact with the belt 60 and assists the running of the belt 60, a flexible foamed plastic is preferable in consideration of the durability of the belt 60.

FIG. 4 is a schematic view showing the flow of the release agent in the conventional roller that discharges the release agent from the inside and applies it to the belt 60. In FIG. 4, the release agent supply flow path 124 is omitted for simplification, and the parallel diagonal line showing the cross section is also omitted to show the flow of the release agent. For example, when foamed plastic is used for the roller outer shell portion 20, when a supply pressure is applied from the release agent supply port 122 to supply the release agent to the release agent storage portion 10, small holes formed on the cylinder are formed. The release agent discharged from No. 14 is loaded in the outer peripheral direction of the radius of the roller outer shell portion 20 by the supply pressure applied to the release agent supply flow path 124. Further, the mold release agent is pulled in the outer peripheral direction of the radius of the roller outer shell portion 20 by the centrifugal force due to the rotation of the roller. At that time, the release agent travels through the connected bubble portion inside the foamed plastic or breaks through the thin wall between the bubbles to make the inside of the roller outer shell portion 20 as straight as possible toward the outer circumference. It will move.

Therefore, when the number of the small holes 14 is small and the distances between the small holes 14 are large, the mold release agent does not spread over the entire outer shell portion 20 of the roller, causing unevenness, and the coating is applied to the belt 60. However, a stable film thickness cannot be formed. On the other hand, if the number of the small holes 14 is increased more than necessary, the pressure for discharge, which also serves as the supply pressure, is insufficient, and stable discharge cannot be performed on the surface of the roller outer shell portion 20.

Therefore, in the release agent application roller 1 according to the present invention, the entire outer shell portion 20 of the roller is impregnated with the release agent in advance. The impregnation of the release agent is carried out slowly over time in a vacuum environment. According to this method, the release agent breaks the thin wall between the small bubbles inside the outer shell portion 20 of the roller and is impregnated in all directions. The passage formed at that time is laid in a capillary shape inside the roller outer shell portion 20 as a release agent discharge passage 22. FIG. 5 is an enlarged cross-sectional view taken along the line AA'in FIG. It is a schematic diagram which showed the mold release agent discharge flow path 22 formed in a capillary tube inside the roller outer shell part 20. Further, the impregnated mold release agent is held in a state of being filled in the roller outer shell portion 20.

By mounting the release agent application roller 1 provided with the roller outer shell portion 20 filled with the release agent on the belt conveyor 50, the rollers included in the roller that discharges the release agent from the inside and applies it to the belt 60. It is possible to solve the problem that the release agent does not spread over the entire outer shell portion 20 and the coating film transferred to the belt 60 becomes uneven. The release agent discharged from the small hole 14 of the release agent storage unit 10 by the supply pressure further acts in combination with the centrifugal force and the capillary phenomenon, and the release agent discharge flow path 22 formed in advance is impregnated in advance. It passes freely in all directions using the release agent as priming water, and moves toward the outer periphery of the roller outer shell portion 20. As a result, the mold release agent can be exuded substantially evenly from the entire surface of the roller outer shell portion 20. Therefore, the release agent may be supplied at a constant supply pressure, and it is not necessary to control the pressure.

In the absence of the belt 60, when a supply pressure is applied to rotate the release agent application roller 1 in which the release agent is supplied to the release agent storage portion 10, the release agent formed inside the roller outer shell portion 20 is rotated. The release flow path 22 and the pre-impregnated mold release agent made it possible for the mold release agent discharged from the small holes 14 to uniformly seep out to the surface of the roller outer shell portion 20.

However, during actual transportation, the release agent application roller 1 is pressed by the belt 60 from above. Further, the return roller is a crown type in which the central portion in the longitudinal direction of the cylinder is bulged in order to prevent the belt 60 from meandering, and the central portion in particular receives a large load from the belt 60. FIG. 6 is a schematic view showing an example of the flow of the release agent in the release agent application roller 1 according to the present invention. In FIG. 6, the release agent supply flow path 124 is omitted for simplification, and the parallel diagonal line showing the cross section is also omitted to show the flow of the release agent. As shown in FIG. 6, the release of the mold release agent to the surface at the central portion is restricted by the pressure of the belt 60, and after moving in both directions in the longitudinal direction of the cylinder, it seeps out to the surface. Therefore, the film formed by being applied to the central portion of the belt 60 may be thinner than the film on both ends perpendicular to the traveling direction of the belt 60.

Therefore, the inventors of the present application have solved the problem of film thickness unevenness caused by pressing the belt 60 by further examining the shape or arrangement of the small holes 14 provided on the release agent storage portion 10 cylinder. Hereinafter, examples of the shape or arrangement of the small holes 14 provided in the release agent storage unit 10 will be described.

FIG. 7 is a schematic view showing an example in which a phase difference is provided between the small hole sets 141 provided in the release agent storage unit 10. The case where the cylinder of the release agent storage part 10 is a cylinder is shown. The small holes 14 are a set of small holes 14 arranged on the cylinder at the same angle around the rotation axis AR, that is, at equal intervals on the circumference of the cylinder. In the figure, the small holes 14 arranged on the broken line form a set (the same is true in FIGS. 8, 10 and 11). As an example, a small hole set 141 is shown by arranging four pieces on a cylinder at intervals of 90 degrees about the rotation axis AR. A plurality of small hole sets 141 are arranged at predetermined intervals from the central portion in the longitudinal direction of the cylinder. At that time, it is preferable that the adjacent small hole sets 141 have a phase difference around the rotation axis AR. In FIG. 7, each small hole assembly 141 is provided with small holes 14 at intervals of 90 degrees about the rotation axis AR. The adjacent small hole assembly 141 is arranged in a state having a phase difference by rotating 45 degrees around the rotation axis AR with respect to the small hole assembly 141 arranged in the central portion in the longitudinal direction of the cylinder. Further, the adjacent small hole assembly 141 is rotated by 45 degrees around the rotation axis AR and arranged in a state having a phase difference. Therefore, the small hole assembly 141 is apparently in the same phase as the small hole assembly 141 arranged in the central portion in the longitudinal direction of the cylinder. That is, two sets of small hole sets 141 are evenly arranged as one set. By providing a phase difference between the small hole sets 141, the degree of dispersion of the release agent discharge to the roller outer shell portion 20 is increased, and the uniformity of the release agent discharge to the roller outer shell portion 20 is improved. Further, in order to improve the uniformity of the release agent discharge in the circumferential direction, it is possible to set a phase difference of an angle smaller than 45 degrees for the adjacent small hole sets 141. For example, when the phase difference is set to 30 degrees, three sets of small hole sets 141 are evenly arranged as a set.

FIG. 8 is a schematic view showing an example in which the density of the small holes 14 provided in the release agent storage portion 10 is changed. The plurality of small hole sets 141 having the phase difference shown in FIG. 7 are arranged by setting a long distance between the small hole sets 141 from the central portion in the longitudinal direction of the cylinder toward both ends. Specifically, the distance between the small hole assembly 141 arranged in the central portion in the longitudinal direction of the cylinder and the small hole assembly 141 on both sides is L1. Subsequently, the distance between the small hole sets 141 adjacent to both ends is L2, the distance from the small hole sets 141 adjacent to both sides is L3, and the relationship between L1, L2, and L3 is L1 <L2 <L3. L1, L2 and L3 are set so as to gradually increase toward both ends. That is, the density of the small hole set 141 is set so as to decrease from the center of the cylinder toward both ends. By changing the density, the flow of the release agent was controlled to equalize the amount of seepage over the entire surface of the roller outer shell portion 20. This makes it possible to prevent unevenness in the film thickness caused by pressing the belt 60.

When the distance between the small hole sets 141 is set to be constant as in the release agent coating roller 1 according to the present invention shown in FIG. 6, the closer to both ends of the roller outer shell portion 20 in the longitudinal direction of the cylinder, the closer to the surface. The amount of exudation increases. Therefore, the film thickness near the center of the belt 60 tends to be thin, and the film thickness near both ends of the belt 60 tends to be thick.

On the other hand, in Example 2 shown in FIG. 8, small holes 14 are gathered near the center in the longitudinal direction of the cylinder, and the mold release agent supplied to the mold release agent storage unit 10 by applying the supply pressure is the supply pressure and centrifugation. The roller outer shell 20 moves linearly toward the surface of the roller outer shell 20 in the radial direction around the circumference of the roller 20 against the pressure of the belt 60 due to a force or the like, but the belt 60 is pushed near the surface of the roller outer shell 20. It is slightly deflected to both ends in the longitudinal direction of the cylinder by the pressure, moves to both ends in the longitudinal direction of the cylinder, and the mold release agent is discharged to the surface of the roller outer shell portion 20.

The state is shown in FIG. In FIG. 9, the release agent supply flow path 124 is omitted for simplification, and the parallel diagonal line showing the cross section is also omitted to show the flow of the release agent. Since the release agent discharged from the central small hole 14 is pushed to both ends, the release agent discharged from the outer small hole 14 is sequentially pushed to both sides.

On the other hand, the smaller the hole set 141 closer to both ends of the roller outer shell portion 20 in the longitudinal direction of the cylinder, the smaller the influence of the pressing force of the belt 60, and the release agent supplied to the release agent storage unit 10 by applying the supply pressure. Is discharged from the small hole 14 and moves with less resistance as it approaches both ends due to the supply pressure and centrifugal force.

In the second embodiment, the small hole sets 141 are arranged at a distance toward both ends, and the smaller holes 14 closer to both ends have a larger range of filling the roller outer shell portion 20 with the release agent, but in the longitudinal direction of the cylinder. By merging with the release agent that has moved from the vicinity of the center to both ends, the amount of the release agent that seeps out to the surface can be made to be about the same as the vicinity of the center in the longitudinal direction of the cylinder, and proceeds from the center of the belt 60. It is possible to form a film with a substantially uniform film thickness up to both ends perpendicular to the direction.

In the second embodiment, the small hole sets 141 are arranged so as to be separated from each other toward both ends so that the density when a plurality of small holes 14 are provided decreases from the center of the cylinder toward both ends of the cylinder. Although set, the density of the small holes 14 can be changed while keeping the distance between the small hole groups 141 the same by changing the number of the small holes 14 in the small hole group 141. Specifically, the number of small holes 14 as close to the center in the longitudinal direction of the cylinder is set to be larger than the number of small holes 14 of the small hole groups 141 on both ends. As a result, the same effect as in Example 2 can be obtained.

FIG. 10 is a schematic view showing an example in which the area of the small holes 14 provided in the release agent storage portion 10 is changed. The area of the small hole 14 refers to the surface area of the discharge port portion of the small hole 14. In FIG. 10, the distance between the small hole sets 141 is set to be constant (in FIG. 10, it is set to L2), and the area of the small holes 14 is changed to control the flow of the mold release agent to control the roller outer shell portion 20. The amount of exudation over the entire surface was equalized. The area of the small holes 14 arranged near the center in the longitudinal direction of the cylinder was set large, and the area of the small holes 14 was gradually decreased as it approached both ends. As a result, as in the second embodiment, the amount of the release agent discharged is reduced as the small holes 14 are closer to both ends, but the release agent is merged with the release agent that has moved from the vicinity of the center in the longitudinal direction of the cylinder to both ends. The amount of the release agent that seeps out to the surface can be made to be about the same as the vicinity of the center in the longitudinal direction of the cylinder, and a film can be formed with a substantially uniform film thickness from the center to both ends of the belt 60. ..

FIG. 11 is a schematic view showing an example in which the area and density of the small holes 14 provided in the release agent storage portion 10 are changed. In FIG. 11, the distance between the small hole sets 141 is set to be smaller from the vicinity of the center in the longitudinal direction of the cylinder to both ends (in FIG. 11, L1 <L2 <L3 is set), and the area of the small holes 14 is changed. As a result, the flow of the release agent was controlled to equalize the amount of seepage over the entire surface of the roller outer shell portion 20. That is, it is an example in which Example 2 and Example 4 are combined. As a result, as in the other embodiments, the area and density of the small holes 14 become smaller as they approach both ends, and the amount of the release agent discharged decreases, but the small holes 14 move from the vicinity of the center in the longitudinal direction of the cylinder to both ends. By merging with the release agent, the amount of the release agent that seeps out to the surface can be controlled to be about the same as the vicinity of the center in the longitudinal direction of the cylinder, and is uniform from the center to both ends of the belt 60. It is possible to form a film with a film thickness of.

The combination of the arrangement and the area of the small holes 14 is not limited to the above embodiment, and can be changed depending on the characteristics of the belt conveyor 50 and the transported object to be adopted. For example, when the transported object easily adheres to the vicinity of both ends perpendicular to the traveling direction of the belt 60, the small holes 14 are formed so as to increase the thickness of the release agent coating film at both ends of the roller outer shell portion 20 in the longitudinal direction of the cylinder. It is also possible to set a large density from the vicinity of the center in the longitudinal direction of the cylinder toward both ends.

The release agent coating roller according to the present invention can be used in various belt conveyors without selecting a transported object to prevent the transported object from adhering to the belt.

1 Release agent application roller 10 Release agent storage part 102 Wall part 12 Release agent supply part 122 Release agent supply port 124 Release agent supply flow path 126 Release agent supply flow path Discharge hole 14 Small hole 141 One set Small hole (small hole set)
20 Roller outer shell 22 Release agent discharge flow path 30 Rotating shaft 50 Belt conveyor 60 Belt 70 Return roller 702 according to the present invention Normal return roller 72 Carrier roller 74 Impact carrier roller 76 Presser roller 80 Head pulley (drive pulley)
82 Tail pulley 84 Snub pulley 86 Tension pulley 88 Bend pulley 90 Hopper AR Rotation axis L1 to L3 Distance between small holes
LF mold release agent extrusion direction PS supply pressure BP belt pressure

Claims (7)

In a roller used to run the belt of a belt conveyor or to assist running
The roller
A mold release agent supply unit that doubles as a rotating shaft,
Release agent storage and
Roller outer shell and
Consists of
The release agent supply department in the previous term
A mold release agent supply flow path and a mold release agent supply port are provided on the rotation axis.
The release agent storage unit
It is formed in a tubular shape, and the wall portion of the cylinder is provided with a small hole for discharging the mold release agent to the outer shell portion of the roller.
On the outer shell of the roller,
Pre-impregnated with mold release agent almost uniformly,
A release agent coating roller characterized by. When the release agent is impregnated in advance, a capillary tubular release agent discharge flow path is formed inside the outer shell of the roller.
The release agent coating roller according to claim 1. In the wall portion of the mold release agent storage portion
A plurality of sets of the small holes arranged at equal intervals around the rotation axis are arranged as one set.
The release agent coating roller according to claim 1 or 2. The pair of adjacent small holes
Having a phase difference around the rotation axis,
The release agent coating roller according to claim 3. In the wall portion of the mold release agent storage portion
The density when a plurality of the small holes are provided is set so as to decrease from the center of the cylinder toward both ends of the cylinder.
The release agent coating roller according to any one of claims 1 to 4, wherein the release agent coating roller is characterized. The area of one small hole is set small from the center of the cylinder toward both ends of the cylinder.
The release agent coating roller according to any one of claims 1 to 5, wherein the release agent coating roller is characterized. The outer shell of the roller
A return roller that assists the running of the belt and a crown type that has a bulge in the center of the cylinder.
The release agent coating roller according to any one of claims 1 to 6, wherein the release agent coating roller is characterized.

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