50results about "Leather pressing/rolling" patented technology

The utility model discloses a surface stretching device for leather production, which comprises a base, four corners of the bottom of the base are fixedly provided with supporting legs, the top of the base is fixedly connected with a mounting rack, one side of the mounting rack is provided with a flattening assembly, one side of the base is provided with a clamping assembly, and the clamping assembly is fixedly connected with the base. In the process that the connecting block moves downwards, the two compacting rollers can be driven to move towards the two sides at the same time, leather is flattened and compacted, fibers on the surface of the leather can be more evenly distributed, the wrinkles and unevenness phenomena are eliminated, the quality of the leather is improved, and the quality of the leather is improved. The two sides of the leather can be fixed through the two clamping plates, meanwhile, the two clamping plates can be far away from each other through the fixing plate which continuously moves upwards and the connecting plate, the stretched leather is pulled to be flat, and the situation that the leather is close to the two sides of the clamping plates and accumulated, and wrinkles of the leather are caused is prevented.

A cow leather slicing machine comprises a machine frame, a conveying mechanism, a material pressing mechanism and a saw blade mechanism, the conveying mechanism, the material pressing mechanism and the saw blade mechanism are arranged on the machine frame, the part, pressed towards cow leather, of the material pressing mechanism is divided into a plurality of material pressing units capable of swinging relatively and independently, and each material pressing unit is pressed downwards through a corresponding elastic pushing piece. The material pressing units are arranged side by side, the material pressing units can be pressed on the corresponding sections of cowhide, even if the cross section of the cowhide is high or low, all the material pressing units arranged side by side can enable the bottom face of the cowhide to be flat, and the material pressing wheels on the material pressing units independently roll to push the cowhide at the corresponding positions, so that the material pressing efficiency is improved, and the material pressing efficiency is improved. According to the cow leather cutting device, the whole cow leather can be conveyed to the saw blade mechanism with enough force, so that the situation that the cow leather slips due to insufficient thrust can be avoided, the cow leather can be uniformly and stably fed into the saw blade mechanism to realize efficient and automatic cutting of the cow leather, and therefore, the cow leather cutting device is high in automation degree, high in cow leather cutting efficiency and uniform in cow leather cutting.

The utility model discloses a leather flattening device for waistband processing in the technical field of leather processing, which comprises a bottom plate, a control mechanism is arranged at the top of the bottom plate, a control plate is arranged at the top of the control mechanism, a connecting mechanism is arranged at the top of the control plate, and connecting plates are arranged on the left side and the right side of the top of the connecting mechanism. Clamping mechanisms are arranged on the sides, close to each other, of the two connecting plates, a side plate is arranged behind the top of the bottom plate, a first roller is rotationally connected to the front of the side plate, a lifting mechanism is arranged on the top of the front of the side plate, a control groove is formed in the top of the bottom plate, and the control mechanism comprises a control motor; the control motor is arranged on the right side of an inner cavity of the control groove, a control lead screw is arranged at the power output end of the left side of the control motor, a control sliding plate is connected to the control lead screw in a threaded mode, and the leather flattening device solves the problems that when the leather flattening device is used, leather cannot be repeatedly rolled conveniently, and the leather flattening effect is limited.

The invention relates to a spreading machine for roller leather finishing.

The utility model relates to the technical field of leather products, in particular to an integrated imprinting device for the leather products. According to the technical scheme, the device comprises a workbench, a rack, a gear and a threaded disc, a long rod is fixed to the workbench, a lower mold is installed at the top end of the long rod, the bottom end of an air cylinder is movably connected with an air rod, an upper mold is installed at the bottom end of the air rod, a first support is fixed to the workbench, an inserting plate is inserted into the first support, and the rack is fixed to the inserting plate; a fixing plate is fixed to the first support, a rotating shaft is rotatably connected to the rear end of the fixing plate, a gear is fixed to the rear end of the rotating shaft and connected with the rack in a meshed mode, a connecting plate is fixed to the inserting plate, a first disc is fixed to the connecting plate, a second disc is fixed to the first disc, and a leather product body is placed on the first disc. The second disc is in threaded connection with the threaded disc. The leather product pressing device has the advantages that the leather product body can be kept tight, and the leather product body is prevented from being wrinkled to influence imprint.

The utility model relates to a vacuum machine, in particular to a vacuum machine for improving leather brightness, which comprises a base, a vacuum machine main body, a placing plate, a supporting block, a first electric slide rail and the like, bases are symmetrically arranged on one side of the bottom of the vacuum machine body, first electric sliding rails are arranged on the two symmetrical sides of a cavity in the lower portion of the vacuum machine body, supporting blocks are connected to the first electric sliding rails in a sliding mode, a containing plate is jointly connected between the supporting blocks, and the containing plate is arranged in an inner cavity in the lower portion of the vacuum machine body. The electric clamp is driven to move to an inner cavity in the lower portion of the vacuum machine body through extending movement of the piston rod of the air cylinder, leather is conveyed to the containing plate, the second electric sliding rail drives the sliding block to horizontally move along the second electric sliding rail, the sliding block drives the smoothing scraper to horizontally move through the telescopic rod, and therefore the leather on the containing plate is efficiently smoothed.

The utility model discloses a punching device for leather bag production, and relates to the technical field of leather bag production, the punching device comprises a workbench, the top of the workbench is provided with a punching mechanism, the top of the workbench is provided with a flattening clamping mechanism used for keeping the flatness of leather during clamping, the flattening clamping mechanism comprises a flattening assembly, a punching assembly and a clamping assembly, the device is arranged at the top of a workbench and comprises a mounting frame fixedly mounted at the top of the workbench, an air cylinder is fixedly mounted at the top of the mounting frame, a connecting block is fixedly mounted at the bottom end of an output shaft of the air cylinder, and a first connecting rod and a second connecting rod are mounted in the connecting block in a hinged mode; and the clamping assembly is arranged at the top of the workbench and used for clamping the leather, an air cylinder operates to drive a connecting block to descend, a first rolling wheel and a second rolling wheel make contact with the leather, and a first connecting rod and a second connecting rod reversely rotate with a first gear and a second gear as the axis at the same time, so that flattening treatment on the surface of the leather is achieved.

The present invention relates to a spreading machine for roller leather finishing with a rubber conveyor belt.

The utility model relates to printing product compaction auxiliary equipment, which aims to solve the technical problem that the existing printing product compaction auxiliary equipment is difficult to process an air bag between leather and a placing table, and comprises the placing table, a C-shaped mounting frame is arranged on the table surface of the placing table, and an air cylinder is arranged at the top of the C-shaped mounting frame. The output end of the air cylinder extends to an inner cavity of the top of the C-shaped mounting frame and is fixedly connected with a printing head, and a compaction mechanism is arranged between the printing head and the inner wall of the top of the C-shaped mounting frame. The air cylinder drives the printing head and the mounting plate to descend, the pressing wheel firstly makes contact with leather, the connecting rod overturns towards the outer portion of the mounting plate in the connecting groove, the pressing wheel is pushed outwards to rotate in the C-shaped mounting frame, the leather is subjected to acting force in the downward and pressing wheel pushing direction, and then an air bag between the leather and the containing table is pushed to be flat. And the blowing-flat assembly can blow an air bag in the leather at the center of the bottom of the printing head to the outer side, and the pressing wheel can extrude and level the leather more conveniently.

The utility model discloses a cow leather rolling device which structurally comprises a rolling box, a rolling wheel and a brush, cow leather is discharged through a discharging roller and is placed between the rolling wheel and the brush through the interior of a moving cavity, so that the other end of the cow leather is connected with a wind-up roller in a containing cavity, and the rolling wheel is connected with the brush. Under the action of a guide wheel on a fixed mounting plate, cow leather can be conveniently conducted, so that friction resistance is reduced during transferring, under pushing of an electric push rod, a rolling wheel at the upper end downwards clamps the cow leather, the rolling wheel is heated under the action of a heating piece in the rolling wheel, and when a motor drives a winding roller to rotate for winding, the cow leather can be conveniently conveyed; the cow leather softening and rolling effect is better under the heating action while the rolling wheels press and roll the cow leather, dust and impurities on the surface of the cow leather are cleaned in the cow leather pulling process when a brush makes contact with the upper face and the lower face of the cow leather, and the dust and the impurities are sucked into a filter box to be filtered through a dust suction opening and a material suction pipe under the action of a suction fan; therefore, the influence of impurities on cow leather is avoided.

The utility model relates to an adjustable flattening device which comprises a workbench, a stamping structure and a supporting column, the stamping structure is of a U-shaped structure, the two sides of the stamping structure are fixed to the side faces of the workbench, the top of the stamping structure is located above the workbench, pneumatic columns are arranged on the outer side of the top of the stamping structure, telescopic columns are arranged on the inner side of the stamping structure, the other sides of the telescopic columns are connected with a flattening plate, and a heat conduction layer is arranged at the bottom of the flattening plate. A buffer layer is arranged below the heat conduction layer, a second temperature controller is arranged on the side face of the flattening plate, the four corners of the workbench are connected with supporting columns through stabilizing wheels, a first rotary knob is arranged on any outer side face of the punching structure and matched with a pneumatic column, a conveying belt is arranged in the middle of the workbench, and the temperature of the heat conduction layer is controlled through the second temperature controller. The temperature requirement for unrecognized material flattening is met, the flattening efficiency is improved, the pressure condition of the pneumatic column is controlled through the first rotary knob, the flattening pressure is further controlled, the stamping requirements of different objects are met, and the adverse effect on the flattening effect due to insufficient flattening or excessive flattening is avoided.

The utility model discloses a leather stretching and flattening device for leather product production, which belongs to the technical field of leather product production and comprises a worktable, expanded edges are arranged on three sides of the bottom end of the worktable, supporting legs are fixedly mounted at four corners of the bottom end of each expanded edge, and a fixing seat is fixedly mounted on one side of the top end of the worktable. And a positioning compression roller is rotationally mounted at the upper end in the fixed seat. A second motor is started to enable a second threaded rod to rotate, then a stretching frame moves along a second sliding groove to stretch and unfold leather, then a first motor is started to enable a first threaded rod to rotate so as to enable two limiting arms and a lifting frame to move along a first sliding groove, and meanwhile two hydraulic columns extend at the same time so that a pressing frame can press down and flatten the leather. And electric heating rods are fixedly arranged on the two sides of the interior of the pressing frame, softening and re-shaping of the leather are facilitated, an air cylinder extends to enable a flattening roller to stretch out of the interior of a storage groove, the pressing strength on the leather is enhanced, and the wrinkle area of the leather is shaped and flattened emphatically.

The present invention relates to a spreading machine for roller leather finishing with an adjustment mechanism.

The invention discloses softening and flattening equipment for leather production and processing, and relates to the technical field of leather production and processing, the softening and flattening equipment comprises a frame body and a shell fixedly mounted at the top of the frame body, a conveying mechanism is mounted at the top of the frame body, the conveying mechanism is arranged under the shell, a material soaking mechanism is mounted at the feeding end of the frame body, and a material conveying mechanism is mounted at the feeding end of the frame body. A flattening motor is fixedly installed on the side face of the shell through a support, a hot pressing roller is rotatably installed on the inner wall of the shell, and a softening mechanism is installed in the shell. According to the softening and flattening equipment for leather production and processing, soaking is conducted through a softening agent in the material soaking mechanism, the internal fiber structure of leather is effectively changed, the leather is preliminarily softened, then the leather is subjected to loose softening treatment through the softening mechanism, and finally the leather is flattened through hot pressing treatment of the hot pressing roller; the softening and flattening integrated design of the equipment greatly improves the leather production efficiency.

Described is a natural leather trimming machine including: an ironing device for stretching and removing creases and wrinkles from the leather, cutting means for cutting the leather along at least one cutting line, a detection unit configured to detect the position of the leather, the shape of at least one relative end edge, and the position of any defects close to at least one relative end edge, a plurality of conveyor belts and a first command and control unit configured to determine the cutting coordinates of the leather.

The utility model relates to a natural luster finishing machine, in particular to a natural luster finishing machine for improving the uniformity of leather. The natural luster finishing machine capable of improving the uniformity of the leather comprises a supporting frame, a cushion block, a control box, a supporting plate, a placing frame, a lifting plate, an elastic scraping plate, a first motor and the like. A control box is fixedly installed on the right side of the supporting frame, a supporting plate is fixedly installed on the upper portion of the left side of the supporting frame, placing frames are fixedly installed on the rear side of the supporting plate and the left side of the control box, a lifting plate is installed between the tops of the two placing frames, and an elastic scraping plate is fixedly installed on the upper portion of the front side of the lifting plate. A first motor is fixedly installed on the front side of the supporting plate. According to the leather lustring device, wrinkles and the like on leather are scraped to be flat when the leather is lustring through the elastic scraping plate, the lower pressing wheel and other components, and the effect of improving lustring uniformity during lustring is achieved.

The invention relates to the technical field of preparation and processing of high-flame-retardant leather, in particular to a preparation device and a preparation process of high-flame-retardant leather for new energy automobile interiors, which can perform double-sided drying on the high-flame-retardant leather, improve the drying effect on the high-flame-retardant leather and have higher practicability. Comprising a drying box, supporting legs are fixedly connected to the four corners of the bottom end of the drying box, an inlet and an outlet are formed in the left end and the right end of the drying box correspondingly, the lower edges of the inlet and the outlet extend to the bottom end of the drying box, two guide rollers and two flattening rollers are rotationally installed in the drying box, and the two guide rollers are horizontally and symmetrically distributed at the inlet and the outlet; the two sets of flattening rollers are horizontally and symmetrically distributed at the inlet and the outlet, the two sets of air blowing flow equalizing discs are movably installed in the drying box in a vertically symmetrical mode and used for drying the high-flame-retardant leather, and the adjuster comprises an electric telescopic rod which is fixedly installed on the front face of the drying box. The distance adjusting device is used for adjusting the distance from the two sets of blast flow equalizing discs to the high-flame-retardant leather.

The leather slitting device comprises a heating box, a conveying assembly, a flattening assembly, a slitting assembly and an adjusting assembly, the conveying assembly comprises a conveying frame, a plurality of conveying rollers and a conveying table, the conveying frame penetrates through the heating box, each conveying roller is pivoted to the conveying frame, and the conveying table is connected with the discharging end of the heating box; the flattening assembly, the slitting assembly and the adjusting assembly are sequentially installed on the conveying table, the flattening assembly is installed at the end, close to the heating box, of the conveying table, the flattening assembly comprises a first flattening roller and a second flattening roller, and the first flattening roller and the second flattening roller are matched to flatten leather; the slitting assembly comprises a bearing roller, a rotating shaft and a plurality of cutters, the cutters are installed on the rotating shaft, and the bearing roller and the cutters are matched to cut leather; the adjusting assembly comprises a first adjusting roller and a second adjusting roller, and the first adjusting roller and the second adjusting roller are matched to press the leather strip. The leather slitting device can prevent leather from shifting during cutting, and the cutting precision is improved.

The utility model discloses a flattening device for leather processing, which comprises a base, a first support and a second support are respectively mounted on two sides of the base, an unwinding roller is rotatably mounted on the first support, a winding roller is rotatably mounted on the second support, and a worktable is mounted in the middle of the base. A first U-shaped frame and a second U-shaped frame are sequentially arranged on the base in the leather conveying direction, a sweeping and dust removing assembly is arranged on the first U-shaped frame, an air cylinder is arranged at the top of the second U-shaped frame, a first mounting frame is mounted at the end, extending into the second U-shaped frame, of a piston rod of the air cylinder, a driving assembly is arranged in the first mounting frame, and a first telescopic rod is mounted at the bottom of the driving assembly. A second mounting frame is mounted at the bottom of the first telescopic rod, a flattening roller is rotationally mounted in the second mounting frame, and flattening assemblies are arranged on the two sides of the second mounting frame. According to the leather flattening device, impurities on the surface of leather can be cleaned and removed, wrinkles on the leather can be flattened, the flattening effect of the leather is better, and the quality of the leather is improved.

The utility model discloses a full-automatic hot-pressing cutting machine, and relates to the technical field of hot-pressing cutting machines. The device comprises a winding structure, a hot-pressing cutting machine, a conveyor, a conveying belt mounted in the conveyor, a pressing and cutting hydraulic rod fixedly arranged above the conveying belt, a hot-pressing mold located at the lower end of the pressing and cutting hydraulic rod, and an arrangement structure, comprising an air heater, a suction cover located at the suction end of the air heater, a suction cover penetrating through a suction pipe, a mounting frame fixedly arranged above a conveying belt, a sorting hydraulic rod located in the mounting frame, a fixing frame located at the lower end of the sorting hydraulic rod, a stroke plate located in the fixing frame, a sorting plate located at the lower end of the stroke plate and a first motor located at one end of the fixing frame. The screw is located at the output end of the first motor, and the through hole is formed in the conveying belt. According to the utility model, the arrangement structure is arranged, so that the problems that the cutting precision of the hot-pressing cutting machine is influenced and the flatness of the surface and the quality of a product is reduced due to irregularity during pressing and cutting caused by wrinkles of leather are solved.

This invention discloses a leather stretching and flattening device for leather product manufacturing, relating to the field of leather processing technology. The invention includes a base, with a support plate fixed to its upper surface. A first motor is fixed to both sides of the support plate. A threaded rod is fixed to the output shaft of the first motor, and a threaded tube is threadedly connected to the outer ring of the threaded rod. A first bearing is fixed to the outer ring of the threaded tube, and a transmission plate is fixed to the outer ring of the first bearing. Through the action of a clamping roller, the output shaft of a second motor drives a transmission shaft to rotate. The transmission shaft, in turn, drives the clamping roller to rotate via the support rod. The rotation of the clamping roller further stretches the leather. The cylindrical clamping roller provides uniform support to both ends of the leather, preventing wrinkles caused by uneven tension. This device can stretch the leather according to its length and toughness, and the adjustment process is quick and convenient, greatly improving the working efficiency of the stretching device.

The invention discloses a belt type roller coater which comprises a rack, a leather feeding machine, a roller coater main machine and a leather receiving machine are sequentially arranged on the rack, a leather pressing device is installed on the leather feeding side of the roller coater main machine, and a leather uncovering device is arranged on the leather discharging side of the roller coater main machine; the roller coating main machine comprises a coating roller, a belt type bearing mechanism and a material melting device, the belt type bearing mechanism comprises a large-diameter transmission roller, a small-diameter tensioning roller and a bearing belt, a deviation rectifying roller is further arranged on the inner side of the bearing belt between the large-diameter transmission roller and the small-diameter tensioning roller, and a first inclined face and a second inclined face which are different in gradient are formed on the upper side of the belt through the deviation rectifying roller. The peeling device comprises a peeling roller, and a peeling assembly with vertical fall is formed between the peeling roller and the first inclined face and the second inclined face of the bearing belt. The fall type conveying mechanism with the vertical fall is matched with the leather uncovering roller, so that after leather roller coating is completed, the leather reaches the position of the leather uncovering roller through the surface of the belt with the large fall, and smooth leather uncovering and smooth process conveying are further guaranteed.

The utility model discloses a leather embossing device for leather processing, which comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with a support frame, the front surface of the support frame is fixedly connected with a sliding rail, the sliding rail is slidably connected with an electric sliding block, the front surface of the electric sliding block is fixedly connected with a mounting plate, and the front surface of the mounting plate is fixedly connected with a motor. The output end of the motor is fixedly connected with a rotating rod, the other end of the rotating rod is fixedly connected with a pressing roller, the inner surface of the pressing roller is fixedly connected with a heater, the output end of the heater is fixedly connected with a heating wire, the heating wire is fixedly connected with the pressing roller, and the lower surface of the supporting frame is fixedly connected with an embossing device. Through cooperation of the sliding rail, the electric sliding block, the motor, the rotating rod and the pressing roller, leather can be flattened to prevent wrinkles, the surface is smoother, wrinkles can be effectively reduced, the appearance of a finished product is more exquisite and professional, and the defective rate is reduced.

The utility model discloses whole grain surface cowhide natural grain selection sofa leather processing equipment, which relates to the technical field of sofa leather processing, and comprises an operation table, one end of the operation table is provided with an installation assembly, the installation assembly comprises an installation frame, and the output end of a first motor installed on one side of the installation frame is connected with a first bidirectional threaded rod; first moving frames are spirally connected to the spirals at the two ends of the first bidirectional threaded rod, the first moving frames are slidably mounted on the first sliding rods, clamping frames are fixedly connected to the bottoms of the first moving frames, rotating discs are rotatably mounted on the clamping frames, positioning rods are arranged on the rotating discs in an annular array mode, and a winding roller is clamped between the rotating discs of the mounting assembly; a second motor is installed on the clamping frame at one end of the first two-way threaded rod, and the output end of the second motor is connected with a rotating disc on the clamping frame. According to the winding roller installation device, the appropriate winding roller is clamped through the installation assembly, the tedious steps of manual adjustment are reduced, and installation and preparation work can be completed more quickly when the winding roller is replaced.

The utility model discloses a leather flattening device, and aims to provide a leather flattening device which can reduce the probability that two symmetrical ends are uneven after leather flattening work. The device comprises a working frame and a pressing plate, the working frame comprises a bottom plate and two side plates, the two side plates are symmetrically distributed at the left end and the right end of a pressing plate groove of the bottom plate, a switch assembly is installed in a moving groove in the bottom end of each side plate, the working frame is detachably connected with a moving plate, and an electric cylinder is installed on a moving rod of the moving plate and electrically connected with the switch assembly. A lead screw on the electric cylinder is connected with the pressing plate, the two limiting blocks are symmetrically distributed at the left end and the right end of the pressing plate, and the limiting blocks correspond to the moving grooves in a one-to-one mode. The leather flattening device has the beneficial effects that the purpose of reducing the probability that two symmetrical ends are uneven after the leather flattening work can be achieved; the inspection and maintenance work of the working frame and the pressing plate is facilitated; and the effect that the electric cylinder can be started to work and pushed to work at the same time is achieved.

The utility model belongs to the technical field of leather processing equipment, and particularly relates to a leather buffing and leveling machine which comprises a support, a conveying mechanism is installed in the support, a cover shell is fixedly connected to the upper surface of the support, a buffing mechanism, a dust collection mechanism and a leveling mechanism are installed in the cover shell, and the dust collection mechanism and the leveling mechanism are fixedly connected to the upper surface of the support. A first infrared sensor is fixedly connected to the interior of the housing, the buffing mechanism comprises a second motor, and the main body end of the second motor is fixedly connected to the upper surface of the housing. According to the leather buffing and leveling machine provided by the utility model, when a first infrared sensor detects that leather is close to a buffing mechanism, a second motor is started to drive a first lead screw to rotate, synchronously drives a second lead screw to rotate and drives two connecting frames to move downwards, so that a grinding roller and a polishing roller move downwards to be in contact with the leather, and the second motor is stopped after the grinding roller and the polishing roller are in contact with the leather; and the third motor is started to drive the grinding roller and the polishing roller to rotate, grinding and polishing work is completed, leather of different thicknesses can be treated by automatically adjusting the height of the grinding roller and the height of the polishing roller, shutdown for manual adjustment is not needed, and the working efficiency is improved.

The utility model discloses a leather buffing and leveling machine which comprises a fixing unit, a winding and unwinding unit, a pressing unit, a polishing unit and a leveling unit. Compared with the prior art, the leather buffing and leveling machine has the following beneficial effects that (1) when the leather buffing and leveling machine is used, winding, unwinding and leveling of leather are carried out step by step; the problem that the leather possibly deforms due to the fact that the leather is directly pulled in the whole pressing process is effectively solved; (2) the leather buffing and leveling machine is provided with a pressure sensor, when leather is flattened and pressed, the larger the change range of a pressure value is, the larger the wrinkles on the surface of the leather are, the rolling needs to be continuously carried out, when the pressure value detected by the pressure sensor tends to be stable, the surface of the leather is relatively flat, the flattening and pressing process can be stopped, and the production efficiency is improved; therefore, sufficient pressing of the leather is ensured, and the problem that in the prior art, due to the fact that the leather passes through the pressing roller and the heating base at a time, insufficient pressing possibly exists is solved.

The utility model relates to the technical field of leather cutting, and provides leather laser cutting equipment which comprises a workbench, a control equipment body is fixedly connected to the top of the workbench, and an electric guide rail body is fixedly connected to the position, located on the side of the control equipment body, of the top of the workbench. A laser cutting knife body is arranged on the top of the electric guide rail body, and a protection mechanism is arranged in the workbench. By arranging the protection mechanism, when the laser cutting knife main body needs to be used, a worker can control the equipment main body to lift a protection cover of the protection mechanism until a working area is completely covered, so that the protection purpose can be achieved, and the protection cover is made of a laser protection glass material; the anti-laser glass is transparent, so that irritation caused by laser beams can be reduced to a certain extent, and the anti-laser glass is transparent, so that supervision of workers is not affected, the anti-laser purpose is achieved, and the eyes of the workers are protected.