Technical Field
The utility model discloses a split-type conditioning and tempering device with slow curing for corrugated plastic sheets, belonging to the field of plastic machinery. In the production of corrugated plastic sheets from powdery raw materials, the device is used to conduct constant-temperature slow curing and tempering on cooled and shaped corrugated sheets, so as to release internal stress of polymer materials and improve the dimensional stability of corrugated plastic sheets.
Background Art
At present, tempering boxes adopted in corrugated plastic sheet production lines are of integral structure. They cannot realize slow curing during the tempering process. Besides, the oversized integral tempering box exceeds the width limit of transport vehicles, bringing inconvenience to equipment commissioning.In view of the current situation of corrugated plastic sheet manufacturing machinery, there is an urgent demand for a split-type conditioning and tempering device with slow curing, which can realize the optimized tempering process of “tempering – slow curing – tempering”, and features convenient transportation and easy commissioning.
Contents of the Utility Model
The objective of the utility model is to provide a split-type conditioning and tempering device with slow curing for corrugated plastic sheets to overcome the deficiencies of existing corrugated plastic sheet manufacturing equipment. The device can realize slow curing in the tempering procedure, and facilitates transportation and on-site commissioning.
The technical solution is described as follows. The device comprises tempering racks, lower tempering boxes, upper tempering boxes and box opening assemblies.Each tempering rack includes a tempering rack body and supports. The tempering rack body adopts a six-sided box structure without a side panel defined by the longest edge and medium-length edge of the rack body. Supports are mounted at four corners of the opposite side panel parallel to the open face, and the tempering rack body is placed on the ground via the four supports.
Each lower tempering box includes a lower box body, mounting plates, electric heating tubes and carrier rollers. The lower box body adopts a six-sided box structure without a side panel defined by the longest edge and medium-length edge of the box body. Two mounting plates are fixed on the long edge at the open face of one side panel formed by the medium-length edge and shortest edge of the lower box body.Multiple electric heating tubes are evenly installed between the two side panels (formed by medium-length edges and shortest edges) of the lower box body, away from the open face. Multiple carrier rollers are evenly arranged between the two side panels close to the open face. The axes of all carrier rollers are mutually parallel and parallel to the longest edge of the lower box body.The lower tempering box is mounted on the upward open face of the tempering rack body via the side panel opposite to its open face. The longest edge and medium-length edge of the lower box body are aligned with the longest edge and medium-length edge of the tempering rack body respectively.
Each upper tempering box includes an upper box body, mounting plates and electric heating tubes. The upper box body adopts a six-sided box structure without a side panel defined by the longest edge and medium-length edge of the box body. The distance between the longest edges of the open face and the parallel closed face of the upper box body is smaller than the distance between the medium-length edges. Two mounting plates are fixed on the long edge at the open face of one side panel formed by the medium-length edge and shortest edge of the upper box body.Multiple electric heating tubes are evenly installed between the two side panels (formed by medium-length edges and shortest edges) of the upper box body, away from the open face.The upper tempering box is hinged, via the long edge at the open face on the side panel parallel to the plate fitted with mounting plates, to the long edge at the open face of the lower box body on the side panel parallel to its mounting-plate-equipped face.
Each box opening assembly comprises hinge bases, connecting plates, box opening cylinders and protective covers.Each hinge base consists of a hinge base plate, hinge lugs and a hinge plate. Two hinge lugs extend perpendicularly from two parallel edges on one plate surface of the hinge base plate. A coaxial round hole is arranged at the outer end of each hinge lug. A hinge plate with a central round hole is hinged between the round holes of the two hinge lugs at the middle of its two parallel edges.Two hinge bases are mounted on the mounting plates of the lower box body via the plate surface without hinge lugs. The round holes on the hinge lugs of the two hinge bases share the same axis, which is parallel to the medium-length edge of the lower box body.
Each connecting plate includes a connecting base plate and connecting lugs. Two connecting lugs extend perpendicularly from the middle of one plate surface of the connecting base plate. Two round holes are formed on each connecting lug, and the holes on each pair of lugs are coaxial respectively.Two connecting plates are installed on the mounting plates of the upper box body via the plate surface without connecting lugs. The connecting lugs of the two connecting plates are aligned, and the axes of round holes on connecting lugs are parallel to the medium-length edge of the upper box body.
One end of the telescopic rod of each of the two box opening cylinders is mounted on the plate surface of the hinge plate of each hinge base on the side away from the upper tempering box. The extending end of each telescopic rod passing through the round hole of the hinge plate is hinged into the coaxial round holes on the connecting lugs of the connecting plates on the side close to the lower tempering box.Each protective cover is of six-sided box shape, without one side panel defined by the longest edge and medium-length edge and another side panel defined by the medium-length edge and shortest edge. Two protective covers are hinged, via the ends away from the missing panel on two side panels formed by the longest edge and shortest edge, into the coaxial round holes on the connecting lugs of the connecting plates on the side away from the lower tempering box. The opening of each protective cover faces toward the box opening cylinder.
Another tempering device composed of tempering rack, lower tempering box, upper tempering box and box opening assembly is placed on the ground via its four supports. The medium-length edges of the two tempering racks are mutually parallel and aligned. The longest edges of the two tempering racks are parallel to each other. The distance between the adjacent longest edges of the two tempering racks is greater than zero and smaller than the medium-length edge of each tempering rack.
On the basis of the prior art, the tempering rack body adopts a six-sided box structure without a side panel defined by the longest edge and medium-length edge of the rack body. Supports are arranged at four corners of the opposite side panel parallel to the open face, and the tempering rack body is supported on the ground by the four supports.The lower box body of the lower tempering box adopts a six-sided box structure without a side panel defined by the longest edge and medium-length edge. Two mounting plates are fixed on the long edge at the open face of one side panel formed by the medium-length edge and shortest edge of the lower box body. Multiple electric heating tubes are evenly arranged between the two side panels (medium-length edge & shortest edge) away from the open face, and multiple carrier rollers are evenly arranged between the two side panels close to the open face. All carrier roller axes are parallel to one another and parallel to the longest edge of the lower box body. The lower tempering box is installed on the upward open face of the tempering rack body via the side panel opposite to its open face, with the longest and medium-length edges aligned correspondingly.
The upper box body of the upper tempering box adopts a six-sided box structure without a side panel defined by the longest edge and medium-length edge. The distance between the longest edges of its open face and the parallel closed face is smaller than the distance between medium-length edges, forming a feed gap and a discharge gap at both ends along the medium-length edge of the open face respectively. Two mounting plates are fixed on the long edge at the open face of one side panel formed by the medium-length edge and shortest edge of the upper box body. Multiple electric heating tubes are evenly arranged between the two side panels away from the open face.The upper tempering box is hinged to the lower tempering box at the long edge of their open faces. A feed inlet and a discharge outlet are formed at both ends along the medium-length edge of the open face between the upper box body and lower box body.
For each box opening assembly, two hinge lugs extend perpendicularly from two parallel edges on one surface of the hinge base plate, with coaxial round holes at outer ends. The hinge plate with a central hole is mounted between the two hinge lugs. Two hinge bases are fixed on the mounting plates of the lower box body, and the axes of holes on hinge lugs are parallel to the medium-length edge of the lower box body.Two connecting lugs extend perpendicularly from the middle of one surface of each connecting base plate, and each lug is provided with two coaxial round holes. Two connecting plates are installed on the mounting plates of the upper box body. The connecting lugs are aligned and their hole axes are parallel to the medium-length edge of the upper box body.One end of the telescopic rod of each box opening cylinder is fixed on the hinge plate, and the rod end passing through the hinge plate is hinged into the coaxial holes of connecting lugs close to the lower box.Each protective cover is partially open on two side surfaces and hinged on the outer coaxial holes of connecting lugs, with its opening facing the box opening cylinder.
A second identical tempering unit is placed on the ground. The medium-length edges of the two tempering racks are parallel and aligned; the longest edges are mutually parallel. The spacing between the adjacent longest edges is greater than zero and less than the medium-length edge of the tempering rack.
Working Principle
During equipment commissioning or product changeover for different corrugated sheets, activate the box opening cylinders of the four box opening assemblies. As the telescopic rods extend, the two upper tempering boxes are lifted and swing around the hinge axes between upper and lower tempering boxes. Meanwhile, the box opening cylinders together with the hinge plates swing relative to the hinge base plates of the hinge bases.Then the cooled and shaped corrugated sheets are guided sequentially into the gaps between the two groups of lower and upper tempering boxes and supported on the carrier rollers of the lower tempering boxes, and finally led to the subsequent traction equipment. The telescopic rods of the box opening cylinders retract, and the two upper tempering boxes are closed onto the corresponding lower tempering boxes.
Switch on the electric heating tubes of the upper and lower tempering boxes. When cooled and shaped corrugated sheets pass sequentially through the gaps between upper and lower tempering boxes, heat facilitates the release of internal stress in polymer materials, preventing distortion at ambient temperature and improving the stability of corrugated plastic sheets.
The tempering system adopts a split layout. The interval cooling between two split units realizes slow curing of polymer materials, forming an optimized technological route of “constant temperature – slow curing – constant temperature”. This is more favorable for releasing internal stress and further improves sheet stability.In addition, for wide-width corrugated plastic sheet production lines, the width of each tempering rack, lower box and upper box reaches nearly 3 meters. If manufactured as an integral unit, the overall length can reach 4 meters or longer, exceeding the transport limit of ordinary trucks. The split structure greatly simplifies transportation, on-site installation and equipment commissioning.
Compared with existing equipment in the industry, the utility model has the following advantages:When corrugated plastic sheets pass through upper and lower tempering boxes, internal stress of polymer materials is released under heating, avoiding ambient-temperature distortion and improving sheet stability.The split structure creates intermittent cooling zones to realize material slow curing, implementing the optimized “constant temperature – slow curing – constant temperature” process and promoting internal stress elimination.The split design enables convenient transportation, as well as easy field installation and commissioning of the whole equipment.
