CN117261029A - Thermoplastic polyurethane particle manufacturing mechanism - Google Patents
Thermoplastic polyurethane particle manufacturing mechanism Download PDFInfo
- Publication number
- CN117261029A CN117261029A CN202311355580.1A CN202311355580A CN117261029A CN 117261029 A CN117261029 A CN 117261029A CN 202311355580 A CN202311355580 A CN 202311355580A CN 117261029 A CN117261029 A CN 117261029A
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- Prior art keywords
- fixedly connected
- fixed
- sliding
- rod
- polyurethane
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- 239000002245 particle Substances 0.000 title claims abstract description 55
- 239000004433 Thermoplastic polyurethane Substances 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 229920002803 thermoplastic polyurethane Polymers 0.000 title claims abstract description 20
- 229920002635 polyurethane Polymers 0.000 claims abstract description 60
- 239000004814 polyurethane Substances 0.000 claims abstract description 60
- 239000000463 material Substances 0.000 claims abstract description 36
- 238000002347 injection Methods 0.000 claims abstract description 35
- 239000007924 injection Substances 0.000 claims abstract description 35
- 238000005520 cutting process Methods 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 238000005096 rolling process Methods 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention discloses a thermoplastic polyurethane particle manufacturing mechanism, which relates to the technical field of polyurethane particle manufacturing and comprises the following components: the mold assembly comprises a fixed mold and a movable mold positioned right above the fixed mold; the track is fixedly connected to the fixed foundation; the support rod is horizontally arranged on the track in a sliding way; the material injection gun is arranged on the supporting rod and used for injecting molten polyurethane onto the fixed die; the guide rail is fixedly connected to the support rod and sequentially comprises an inclined section and a vertical section from top to bottom; the sliding column is fixedly connected with the movable mould and is in sliding fit with the guide rail; and the driving unit is used for driving the movable die to move vertically. The polyurethane particles manufactured by the invention have regular particle shapes and uniform heights, and the driving unit drives the movable mould to be clamped and opened, and the injection gun can respectively evenly inject materials on the fixed mould through the matching among the track, the support rod, the guide rail and the slide column, and the particle cutting hob can roll the pressed flaky polyurethane into the polyurethane particles with uniform particle shapes.
Description
Technical Field
The invention relates to the technical field of polyurethane particle manufacturing, in particular to a thermoplastic polyurethane particle manufacturing mechanism.
Background
At present, raw materials or recycled polyurethane waste materials are utilized for heating and melting, molten polyurethane is prepared, then extruded through an extruder, and cut into granules directly through a cutter, so that polyurethane granules are obtained, the polyurethane granules are master batches, and a plurality of polyurethane material components can be produced through secondary processing.
The utility model provides a patent for thermoplastic polyurethane granulation equipment, the utility model discloses a number CN217621590U, the name is "a be used for thermoplastic polyurethane granulation equipment", the power distribution box comprises a box body, the interior bottom wall sliding connection of box has the cooling frame, the inner wall fixedly connected with heating cabinet of box, the last surface mounting of box has first motor, the output fixedly connected with round bar of first motor, the fixed surface of round bar is connected with a plurality of stirring arm, the fixed surface of round bar is connected with two connecting rods, the equal fixedly connected with arc scraper blade of one end that the round bar was kept away from to two connecting rods, the inner wall fixedly connected with electrical heating plate of heating cabinet, the upper surface intercommunication of heating cabinet has the feeder hopper, the lower surface intercommunication of heating cabinet has the connecting pipe, the inner wall fixedly connected with shaping case of box, the extrusion chamber has been seted up to the inside of shaping case, the upper surface mounting of shaping case has the second motor, the output fixedly connected with lead screw of second motor, the inner wall sliding connection of extrusion chamber has the round extrusion hole, the lower surface mounting of shaping case has the third motor, the output fixedly connected with cutting knife of third motor. The third motor drives the cutting knife to cut the strip polyurethane into particles, and the granulated polyurethane falls into the cooling frame.
In the prior art such as the above patent, the molten polyurethane is directly cut into polyurethane particles by a cutter after being extruded from an extrusion hole, at this time, the polyurethane particles have not been cooled and set, and there is a case where the shape of the particles is deformed after falling into a cooling frame, so that the particle shape of the manufactured polyurethane particles is not uniform.
Disclosure of Invention
The object of the present invention is to provide a thermoplastic polyurethane particle manufacturing mechanism which solves the above-mentioned drawbacks of the prior art.
In order to achieve the above object, the present invention provides the following technical solutions: a thermoplastic polyurethane particle manufacturing mechanism comprising: the mold assembly comprises a fixed mold and a movable mold positioned right above the fixed mold; the track is fixedly connected to the fixed foundation; the support rod is horizontally arranged on the track in a sliding way; the material injection gun is arranged on the supporting rod and is used for injecting molten polyurethane onto the fixed die; the guide rail is fixedly connected to the support rod and sequentially comprises an inclined section and a vertical section from top to bottom; the sliding column is fixedly connected with the movable mould and is in sliding fit with the guide rail; the driving unit is used for driving the movable mould to vertically move in sequence by the following strokes: the movable mould moves downwards for a first stroke, and the sliding column is in sliding fit with the inclined section so as to enable the material injection gun to move from the first end to the second end of the fixed mould; the movable mould moves downwards for a second stroke, the sliding column is in sliding fit with the vertical section, and the movable mould is matched with the fixed mould; the movable mould moves up for a third stroke, the sliding column is in sliding fit with the vertical section, and the movable mould and the fixed mould are opened; the movable die moves up for a fourth stroke, and the sliding column is in sliding fit with the inclined section so that the grain cutting hob rolls from the second end to the first end of the fixed die.
Further, the cover half includes bounding wall and bottom plate, forms the holding tank between the bounding wall fixed connection to fixed foundation on, and the vertical removal of bottom plate sets up in the holding tank, and the in-process that the bottom plate removed relative holding tank has a bottom plate upper surface not less than the first station of bounding wall upper surface and a bottom plate upper surface to sink into the second station in the holding tank, is equipped with first elastic component between bottom plate and the bounding wall, and the elasticity of first elastic component upwards acts on with on the bottom plate.
Further, an inclined guide piece is fixedly connected to the bottom plate through a connecting rod, a trigger piece is arranged on the supporting rod, and in the rear section of the first stroke, the trigger piece is matched with the inclined guide piece in a sliding contact and abutting mode so that the bottom plate can move from the first station to the second station, and the first elastic piece can store energy.
Further, the material injection gun is arranged in a sliding manner relative to the support rod, and the sliding direction is a horizontal direction perpendicular to the sliding direction of the support rod; the reciprocating assembly is used for driving the material injection gun to reciprocate relative to the supporting rod in the first stroke.
Further, the reciprocating assembly comprises a sliding rod, a second elastic piece and a guide piece, wherein the sliding rod is connected to the supporting rod in a sliding mode, one end of the sliding rod is fixedly connected with the material injection gun, the guide piece is fixedly connected to the fixed foundation, one side of the guide piece is a wavy surface, and elastic force of the second elastic piece acts on the sliding rod to drive the other end of the sliding rod to be in butt joint with the wavy surface.
Further, the reciprocating assembly comprises a sliding rod, a sliding part and a guide piece, wherein the sliding rod is connected to the supporting rod in a sliding mode, one end of the sliding rod is fixedly connected with the material injection gun, the guide piece is fixedly connected to the fixed foundation, a wave-shaped groove is formed in the guide piece, the sliding part is fixedly connected to the sliding rod, and the sliding part is in sliding fit with the wave-shaped groove.
Further, a scraper is fixedly arranged on the supporting rod and is aligned with the upper surface of the bottom plate when the scraper is positioned at the first station.
Further, the front side and the rear side of the scraper along the moving direction are both provided with cutting edges.
Further, the grain cutting hob comprises a shaft barrel which is rotatably connected to the supporting rod, the axis of the shaft barrel is horizontal and perpendicular to the sliding direction of the supporting rod, and a plurality of crisscross blade nets are arranged on the periphery of the shaft barrel.
Further, the grain cutting hob is coaxially and fixedly connected with a gear, and further comprises a rack which is fixedly arranged relative to the fixed foundation, and the gear is meshed with the rack.
In the technical scheme, the thermoplastic polyurethane particle manufacturing mechanism provided by the invention has the advantages that the molten polyurethane is pressed and shaped into the sheet polyurethane through the die assembly, and then the sheet polyurethane is roll-cut into polyurethane particles through the particle cutting hob, so that the particle shapes of the manufactured polyurethane particles are regular and highly uniform. In addition, in the thermoplastic polyurethane particle manufacturing mechanism, the driving unit drives the movable mould to be clamped and opened, and the injection gun can evenly inject materials on the fixed mould and the granulating hob can roll-cut the pressed sheet polyurethane into polyurethane particles with even shapes through the matching among the track, the support rod, the guide rail and the sliding column.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a schematic diagram of a structure provided in an embodiment of the present invention;
FIGS. 2-3 are schematic diagrams illustrating structures according to another embodiment of the present invention;
FIG. 4 is a schematic diagram of a structure according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of the first stroke in the rear stage according to the embodiment of the present invention;
FIG. 6 is a schematic diagram of a first embodiment of the present invention at the end of a first stroke;
fig. 7 is a schematic structural diagram at the end of the second stroke according to the embodiment of the present invention.
Reference numerals illustrate:
1. a fixed mold; 1.1, coaming; 1.2, a bottom plate; 1.3, a first elastic piece; 1.4, supporting rods; 1.5, a sliding rod; 2. a movable mold; 2.1, connecting rod; 3. a track; 4. a support rod; 5. a material injection gun; 6. a guide rail; 6.1, an inclined section; 6.2, vertical section; 7. a spool; 8. a driving unit; 9. an inclined guide; 10. a trigger; 11. a reciprocating assembly; 11.1, a slide rod; 11.2, guides; 11.21; a wave surface, 11.22 and a wave groove; 11.3, a second elastic member; 11.4, a sliding part; 12. granulating hob; 13. a gear; 14. a rack; 15. a scraper.
Detailed Description
In order to make the technical scheme of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.
Referring to fig. 1-7, the thermoplastic polyurethane particle manufacturing mechanism provided by the embodiment of the invention is characterized by comprising a mold assembly, a track 3, a support rod 4, a material injection gun 5, a guide rail 6, a slide column 7, a grain cutting hob 12 and a driving unit 8, wherein the mold assembly comprises a fixed mold 1 and a movable mold 2 positioned right above the fixed mold 1, the movable mold 2 can realize mold closing and mold opening with the fixed mold 1 by vertical movement, at least the movable mold 2 is provided with an anti-sticking coating, the track 3 is fixedly connected on a fixed foundation, the fixed foundation is a structure fixed relative to the ground or a platform of equipment, such as a frame, the support rod 4 is horizontally arranged on the track 3, and a specific moving mode can adopt sliding or rolling; the material injection gun 5 is arranged on the support rod 4, the material injection gun 5 is used for injecting molten polyurethane into the fixed die 1, particularly, in the process that the support rod 4 moves along the track 3, the material injection gun 5 starts material injection when aligning with the fixed die 1, and the opening and closing of the material injection gun 5 are preferably controlled by an electromagnetic valve; alternatively, if the technical scheme that the material injection gun 5 is fixedly connected to the supporting rod 4 is adopted, the molten polyurethane injected onto the fixed die 1 by the material injection gun 5 is in a straight-line segment shape; the guide rail 6 is fixedly connected to the support rod 4, and the guide rail 6 comprises an inclined section 6.1 and a vertical section 6.2 from top to bottom in sequence; the sliding column 7 is fixedly connected with the movable mould 2, in particular to the movable mould 2 is fixedly connected with a connecting rod 2.1, the sliding column 7 is fixedly connected with the connecting rod 2.1, the sliding column 7 is in sliding fit with the guide rail 6, a roller is arranged on the sliding column 7 in a rotating mode, and the roller is in rolling fit with the guide rail 6 to reduce friction resistance; the dicing hob 12 is rotatably arranged on the supporting rod 4, and the dicing hob 12 can rotate.
The driving unit 8 is used for driving the movable mold 2 to vertically move, the driving unit 8 is a device capable of outputting linear reciprocating motion, such as a hydraulic device, an air cylinder, an electric push rod and the like, when the driving unit 8 drives downwards, the movable mold 2 moves downwards to be a mold closing process, the movable mold 2 moves upwards to be a mold opening process, the movable mold 2 moves downwards to be divided into a continuous first stroke and a continuous second stroke, the movable mold 2 moves upwards to be divided into a continuous third stroke and a continuous fourth stroke, the first stroke is opposite to the movement path of the fourth stroke movable mold 2, and the movement paths of the second stroke and the third stroke movable mold 2 are opposite.
The driving unit 8 moves the movable die 2 downwards for a first stroke, the movable die 2 approaches the fixed die 1 but does not complete die assembly, the sliding column 7 is in sliding fit with the inclined section 6.1 of the guide rail 6, so that the supporting rod 4 moves along the track 3, the supporting rod 4 drives the material injection gun 5 and the grain cutting hob 12 to move from the first end to the second end of the fixed die 1, the first end and the second end are opposite ends in the length direction of the fixed die 1, during the period, the material injection gun 5 continuously injects molten polyurethane into the fixed die 1 under the condition of aligning the fixed die 1, the molten polyurethane is distributed on the fixed die 1 as uniformly as possible, and the subsequent die assembly is convenient for rapid uniform die assembly; the driving unit 8 drives the movable die 2 to move downwards for a second stroke, the movable die 2 and the fixed die 1 complete die assembly, molten polyurethane is pressed and shaped into sheet polyurethane, and the slide column 7 moves in the vertical section 6.2 of the guide rail 6, so that the support rod 4 can be kept fixed relative to the track 3; the driving unit 8 drives the movable die 2 to move upwards for a third stroke, the movable die 2 and the fixed die 1 are opened, the sliding column 7 slides in the vertical section 6.2 of the guide rail 6, and the supporting rod 4 still keeps motionless relative to the rail 3; the driving unit 8 drives the movable die 2 to move upwards for a fourth stroke, the movable die 2 is far away from the fixed die 1 to keep enough space with the fixed die 1, the sliding column 7 is in sliding fit with the inclined section 6.1 to enable the supporting rod 4 to reversely move back, the supporting rod 4 drives the material injection gun 5 and the grain cutting hob 12 to return to the first end from the second end of the fixed die 1, the grain cutting hob 12 rolls in the return process, and the flaky polyurethane on the fixed die 1 is roll-cut into polyurethane particles.
According to the thermoplastic polyurethane particle manufacturing mechanism provided by the invention, molten polyurethane is pressed and shaped into sheet polyurethane through the die assembly, and then the sheet polyurethane is roll-cut into polyurethane particles through the particle cutting hob 12, so that the particle shapes of the manufactured polyurethane particles are regular and highly uniform. In the thermoplastic polyurethane particle manufacturing mechanism, the driving unit 8 drives the movable die 2 to be clamped and opened, and the rail 3, the supporting rod 4, the guide rail 6 and the slide column 7 are matched, so that the injection gun 5 can evenly inject materials onto the fixed die 1 and the granulating hob 12 can roll the pressed sheet polyurethane into polyurethane particles with uniform particle shapes.
As a preferred technical scheme, the grain cutting hob 12 comprises a shaft barrel which is rotationally connected to the supporting rod 4, the axis of the shaft barrel is horizontal and perpendicular to the sliding direction of the supporting rod 4, a plurality of criss-cross blade nets are arranged on the peripheral side of the shaft barrel, namely, a plurality of coaxial annular cutters are arranged on the peripheral side of the shaft barrel, each annular cutter is distributed along the axial array of the shaft barrel, a plurality of strip-shaped cutters which are parallel to the axis of the shaft barrel are arranged on the peripheral side of the shaft barrel, each strip-shaped cutter is distributed along the circumferential array of the shaft barrel, and each annular cutter and each strip-shaped cutter form the criss-cross blade nets. Further, the gear 13 is coaxially and fixedly connected to the grain cutting hob 12, the grain cutting hob further comprises a rack 14 fixedly arranged relative to the fixed foundation, the length direction of the rack 14 is arranged along the moving direction of the support rod 4, and the gear 13 is meshed with the rack 14. In the fourth stroke, the moving and returning support rod 4 drives the grain cutting hob 12 to return together, and the gear 13 on the grain cutting hob 12 is meshed with the rack 14, so that the grain cutting hob 12 rolls.
As the preferable mode, circulating cooling liquid is introduced into the shaft barrel, so that the blade net keeps a lower temperature, polyurethane in the shaft barrel is not completely cooled and shaped during the compression molding of the flaky polyurethane, and the low-temperature blade net can enable the notch of polyurethane particles to be further cooled and shaped rapidly during the rolling cutting of the flaky polyurethane by the granulating hob 12, so that the condition that the adjacent polyurethane particles are adhered again after the rolling cutting of the granulating hob 12 can be effectively avoided, and the polyurethane particles can also keep a more standard particle shape.
In another embodiment provided by the invention, the fixed die 1 comprises a coaming 1.1 and a bottom plate 1.2, wherein the coaming 1.1 is fixedly connected to a fixed foundation, a containing groove is formed between the coaming 1.1, the bottom plate 1.2 is vertically arranged in the containing groove in a moving way, a first station of which the upper surface of the bottom plate 1.2 is not lower than the upper surface of the coaming 1.1 and a second station of which the upper surface of the bottom plate 1.2 is immersed in the containing groove are arranged in the process of moving the bottom plate 1.2 relative to the containing groove, a first elastic piece 1.3 is arranged between the bottom plate 1.2 and the coaming 1.1, and the elastic force of the first elastic piece 1.3 acts on the bottom plate 1.2 upwards. Specifically, one side of the track 3 is fixedly connected with a support rod 1.4, the bottom of the bottom plate 1.2 is fixedly connected with a slide rod 1.5, the slide rod 1.5 vertically penetrates through and is connected to the support rod 1.4 in a sliding manner, and the bottom of the slide rod 1.5 is provided with a limiting end cap; the first elastic piece 1.3 comprises a first pressure spring, the first pressure spring is sleeved on the sliding rod 1.5, the top end of the first pressure spring is in butt joint with the bottom of the bottom plate 1.2, and the bottom end of the first pressure spring is in butt joint with the upper surface of the supporting rod 1.4.
Further, an inclined guide piece 9 is fixedly connected to the bottom plate 1.2 through a connecting rod, a trigger piece 10 is arranged on the supporting rod 4, and the trigger piece 10 can be matched with the inclined guide piece 9 in a sliding contact and abutting mode so that the bottom plate 1.2 can be moved from the first station to the second station, and the first elastic piece 1.3 can store energy. Specifically, the inclined guide 9 has an inclined surface, and the trigger 10 is a slider slidingly engaged with the inclined surface, or the trigger 10 is a cylinder capable of rolling and engaged with the inclined surface.
In the embodiment, the elastic force of the first elastic piece 1.3 at the front section of the first stroke enables the bottom plate 1.2 to be in the first station, the moving supporting rod 4 drives the material injection gun 5 to pass through the upper side of the bottom plate 1.2, and the material injection gun 5 injects a piece of molten polyurethane to the bottom plate 1.2; in the rear section of the first stroke, the continuously moving supporting rod 4 drives the trigger piece 10 to be in sliding contact and abutting fit with the inclined guide piece 9, so that the bottom plate 1.2 moves downwards to the second station relative to the coaming 1.1, the first elastic piece 1.3 is also enabled to store energy, when the second stroke is completed to be matched with the die, a closed three-dimensional space is formed among the bottom plate 1.2, the coaming 1.1 and the movable die 2, sheet polyurethane is pressed and formed in the three-dimensional workpiece, the pressed sheet polyurethane can be enabled to be more compact, the edge is neat and the thickness is uniform, and the grain shape of polyurethane particles which are subsequently rolled and cut is more uniform; in the front section of the fourth stroke (the reverse path of the rear section of the first stroke), the moving back supporting rod 4 drives the trigger piece 10 to gradually slide away from the inclined guide piece 9, the elastic force of the first elastic piece 1.3 is released, the bottom plate 1.2 is driven to move upwards from the second station to the first station, and the bottom plate 1.2 ejects the sheet polyurethane from the accommodating groove; in the rear section of the fourth stroke (the reverse path of the front section of the first stroke), the moving back supporting rod 4 drives the material injecting gun 5 to return to the first end of the fixed die 1 together with the grain cutting hob 12, the grain cutting hob 12 rolls in the return way, and the flaky polyurethane on the bottom plate 1.2 is rolled and cut into polyurethane particles.
In still another embodiment provided by the invention, the material injecting gun 5 is arranged in a sliding manner relative to the supporting rod 4, and the sliding direction is a horizontal direction perpendicular to the sliding direction of the supporting rod 4; a reciprocating assembly 11 is also included for driving the injection gun 5 to reciprocate relative to the support rod 4 during a first stroke. So, in the second stroke, annotate material rifle 5 and follow bracing piece 4 along track 3 and remove, slide relatively bracing piece 4 under the effect of reciprocal subassembly 11 simultaneously to make annotate material rifle 5 and present wave motion relatively cover half 1, thereby pour into wavy molten polyurethane into on bottom plate 1.2, make polyurethane distribute more evenly on bottom plate 1.2, follow-up mould compound die is more quick even preforming of being convenient for.
As a preferred technical solution of the present embodiment, the reciprocating assembly 11 includes a sliding rod 11.1, a second elastic member 11.3 and a guiding member 11.2, the sliding rod 11.1 is slidably connected to the supporting rod 4, one end of the sliding rod 11.1 is fixedly connected to the injection gun 5, the guiding member 11.2 is fixedly connected to the fixed base, one side of the guiding member 11.2 presents a wavy surface 11.21, the elastic force of the second elastic member 11.3 acts on the sliding rod 11.1 to drive the other end of the sliding rod 11.1 to abut against the wavy surface 11.21, preferably, the end of the sliding rod 11.1 is embedded with a ball or roller in a rolling manner; the second elastic piece 11.3 comprises a second pressure spring, the second pressure spring is sleeved on the sliding rod 11.1, one end of the second pressure spring is abutted against the supporting rod 4, and the other end of the second pressure spring is abutted against a nut which is in threaded connection with the sliding rod 11.1. In the second stroke, the injection gun 5 moves along the track 3 along the support rod 4, and simultaneously, the end part of the sliding rod 11.1 is in abutting sliding along the wavy surface 11.21, so that the injection gun 5 performs wavy motion above the bottom plate 1.2.
As another preferable technical scheme of the embodiment, the reciprocating assembly 11 includes a sliding rod 11.1, a sliding portion 11.4 and a guiding piece 11.2, the sliding rod 11.1 is slidably connected to the supporting rod 4, one end of the sliding rod 11.1 is fixedly connected to the material injecting gun 5, the guiding piece 11.2 is fixedly connected to the fixed base, a wave-shaped groove 11.22 is formed in the guiding piece 11.2, the sliding portion 11.4 is fixedly connected to the sliding rod 11.1, and the sliding portion 11.4 is slidably or rollingly matched with the wave-shaped groove 11.22. In the second stroke, the injection gun 5 moves along the track 3 along the support rod 4, and simultaneously the sliding part 11.4 on the sliding rod 11.1 moves along the wave-shaped groove 11.22, so that the injection gun 5 moves in a wave shape above the bottom plate 1.2.
As a preferable technical scheme of the invention, a scraper 15 is fixedly arranged on the supporting rod 4, and the scraper 15 is aligned with the upper surface of the bottom plate 1.2 when being positioned at the first station; further, the scraper 15 has cutting edges on both front and rear sides thereof along the moving direction thereof. In the first stroke and the fourth stroke, the supporting rod 4 drives the scraper 15 to synchronously move, and in the fourth stroke, the scraper 15 scrapes the polyurethane particles rolled on the bottom plate 1.2 from the bottom plate 1.2, so that the polyurethane particles are conveniently demoulded; in the first stroke, the scraper 15 scrapes off the residual scraps on the bottom plate 1.2 in the previous polyurethane particle manufacturing period again, and then the injection gun 5 injects materials on the scraped bottom plate 1.2, so that the surfaces of the polyurethane particles manufactured later are clean and are not easy to adhere to the bottom plate 1.2.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the invention, which is defined by the appended claims.
Claims (10)
1. A thermoplastic polyurethane particle manufacturing mechanism, comprising:
the mold assembly comprises a fixed mold and a movable mold positioned right above the fixed mold;
the track is fixedly connected to the fixed foundation;
a support bar horizontally movably disposed on the rail;
the material injection gun is arranged on the supporting rod and is used for injecting molten polyurethane onto the fixed die;
the guide rail is fixedly connected to the support rod and sequentially comprises an inclined section and a vertical section from top to bottom;
the sliding column is fixedly connected with the movable mould and is in sliding fit with the guide rail;
the grain cutting hob is rotationally arranged on the supporting rod;
the driving unit is used for driving the movable mould to vertically move in sequence by the following strokes: the movable mould moves downwards for a first stroke, and the sliding column is in sliding fit with the inclined section so as to enable the material injection gun to move from the first end to the second end of the fixed mould; the movable mould moves downwards for a second stroke, the sliding column is in sliding fit with the vertical section, and the movable mould is matched with the fixed mould; the movable mould moves up for a third stroke, the sliding column is in sliding fit with the vertical section, and the movable mould and the fixed mould are opened; the movable die moves up for a fourth stroke, and the sliding column is in sliding fit with the inclined section so that the grain cutting hob rolls from the second end to the first end of the fixed die.
2. The mechanism of claim 1, wherein the fixed mold comprises a shroud and a bottom plate, the shroud is fixedly connected to the fixed base, a receiving groove is formed between the shroud, the bottom plate is vertically movably arranged in the receiving groove, a first station with the upper surface of the bottom plate not lower than the upper surface of the shroud and a second station with the upper surface of the bottom plate sinking into the receiving groove are arranged in the process of moving the bottom plate relative to the receiving groove, a first elastic element is arranged between the bottom plate and the shroud, and the elastic force of the first elastic element acts upwards on the bottom plate.
3. The thermoplastic polyurethane particle manufacturing mechanism according to claim 2, wherein the base plate is fixedly connected with an inclined guide member through a connecting rod, the supporting rod is provided with a trigger member, and the trigger member can be in sliding contact and abutting fit with the inclined guide member so as to enable the base plate to move from the first station to the second station, and enable the first elastic member to store energy.
4. A thermoplastic polyurethane particle manufacturing mechanism as in claim 3, wherein said injection gun is slidably disposed relative to said support rod in a horizontal direction perpendicular to the direction of movement of said support rod; the reciprocating assembly is used for driving the material injection gun to reciprocate relative to the supporting rod in the first stroke.
5. The mechanism of claim 4, wherein the reciprocating assembly comprises a slide rod, a second elastic member and a guiding member, the slide rod is slidably connected to the support rod, one end of the slide rod is fixedly connected to the material injecting gun, the guiding member is fixedly connected to the fixed base, one side of the guiding member is a wavy surface, and the elastic force of the second elastic member acts on the slide rod to drive the other end of the slide rod to abut against the wavy surface.
6. The mechanism of claim 4, wherein the reciprocating assembly comprises a slide rod, a sliding part and a guiding piece, the slide rod is slidably connected to the supporting rod, one end of the slide rod is fixedly connected with the material injecting gun, the guiding piece is fixedly connected to the fixed base, a wave-shaped groove is formed in the guiding piece, the sliding part is fixedly connected to the slide rod, and the sliding part is slidably matched with the wave-shaped groove.
7. A thermoplastic polyurethane particle manufacturing mechanism as in claim 2, wherein the support bar has a scraper fixedly mounted thereon, the scraper being aligned with the upper surface of the floor when in the first station.
8. A thermoplastic polyurethane particle manufacturing mechanism as in claim 7, wherein said doctor blade has blade edges on both front and rear sides thereof along the direction of movement thereof.
9. The mechanism for producing thermoplastic polyurethane particles according to claim 1, wherein the particle cutting hob comprises a shaft cylinder rotatably connected to the support rod, the axis of the shaft cylinder is horizontal and perpendicular to the moving direction of the support rod, and a plurality of crisscrossed blade nets are arranged on the peripheral side of the shaft cylinder.
10. The thermoplastic polyurethane particle manufacturing mechanism of claim 9, wherein the particle cutting hob is fixedly connected with a gear coaxially, and further comprising a rack fixedly arranged relative to the fixed base, the gear being meshed with the rack.
Priority Applications (1)
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