CN112094395A - High-molecular TPU polyurethane elastomer - Google Patents

High-molecular TPU polyurethane elastomer Download PDF

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CN112094395A
CN112094395A CN202010836025.0A CN202010836025A CN112094395A CN 112094395 A CN112094395 A CN 112094395A CN 202010836025 A CN202010836025 A CN 202010836025A CN 112094395 A CN112094395 A CN 112094395A
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fixedly connected
elastomer
guide
block
parts
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王乐
李洋
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping
    • B29C2045/0077—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping removing burrs or flashes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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    • B29C2045/1784—Component parts, details or accessories not otherwise provided for; Auxiliary operations not otherwise provided for
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Abstract

The invention belongs to the technical field of processing of high-molecular TPU polyurethane elastomers, and particularly relates to a high-molecular TPU polyurethane elastomer, wherein an automatic die used in the production process of the elastomer comprises a protection box, a bottom plate and a guide block; the lower surface of the inside of the protection box is fixedly connected with a bottom plate; a lower die is fixedly connected above the bottom plate; an upper die is fixedly connected to the upper wall of the protection box at a position right above the lower die; the inside of the protection box is connected with a guide block in a sliding manner; the surface of the guide block is fixedly connected with the demoulding block, so that the automatic demoulding of the elastomer is effectively realized, meanwhile, in the automatic demoulding process, the flash can be mechanically removed, the allocation of workers in the production process is reduced, the labor cost is reduced, meanwhile, through stable mechanical operation, the quality of the prepared elastomer is stable, the surface of the elastomer is not scratched, and the service life of the elastomer is prolonged.

Description

High-molecular TPU polyurethane elastomer
Technical Field
The invention belongs to the technical field of processing of high-molecular TPU polyurethane elastomers, and particularly relates to a high-molecular TPU polyurethane elastomer.
Background
The TPU is named as thermoplastic polyurethane elastomer rubber which is mainly divided into polyester type and polyether type, HAs wide hardness range (60HA-85HD), is wear-resistant, oil-resistant, transparent and good in elasticity, is widely applied to the fields of daily necessities, sports goods, toys, decorative materials and the like, can replace soft PVC to meet the environmental protection requirements of more and more fields, is a high polymer material with the vitrification temperature lower than room temperature and the elongation at break higher than 50 percent and better recoverability after external force is removed, is a special class of elastomers, HAs wide hardness range and wide performance range, and is a class of high polymer materials between rubber and plastic.
According to CN109762127A, the energy-saving and environment-friendly preparation method of the high polymer TPU polyurethane elastomer comprises the steps of putting all components into stirring equipment for mixing and stirring, obtaining a raw material liquid after stirring, injecting the raw material liquid into a mold, heating the mold, demolding after molding, and achieving the purposes of low cost, environmental protection, simple preparation method and large-scale production.
However, in the prior art, a molding method is adopted for producing the high molecular TPU polyurethane elastomer, a large amount of flash is generated by molding, the flash is not removed in time, the later normal use of the elastomer is seriously affected, and meanwhile, the appearance of a finished product is also affected by the flash, and the prior solution is as follows: clear away the flash one by one through the manual work, cleaning efficiency is lower, because the elastomer is soft state, the normal structure of very easy fish tail elastomer itself when clearing away the flash, these fish tail scars can enlarge gradually in long-term use, and finally make the product break, lead to the life of product to seriously reduce, the work is clear away to the manpower simultaneously, the human cost is higher, simultaneously after the elastomer molding takes, need the manpower to get the material from the mould, because the elastomer of molding is mostly great object, it is comparatively difficult to demold through the manpower, need many people to carry out in coordination, and the elastomer temperature of just molding is higher, scald the staff easily, and through the direct a large amount of heats of giving off in the air around of elastomer body, and then lead to the temperature around the mould, the operating environment is bad scheduling problem.
In view of this, in order to overcome the above technical problems, the present inventors designed and developed a high molecular TPU polyurethane elastomer, and solved the above technical problems through an automatic mold used in the production process of the elastomer.
Disclosure of Invention
In order to make up for the deficiency of the prior art and solve the problem in the prior art that the production of the high molecular TPU polyurethane elastomer adopts a molding method, a large amount of flash is generated by molding, the flash is not removed in time, the later normal use of the elastomer can be seriously influenced, and simultaneously the flash also influences the appearance of the finished product, the prior solution is as follows: the flash is removed one by manpower, the cleaning efficiency is lower, the elastomer is in a soft state, the flash is removed, and the normal structure of the elastomer is very easy to scratch, these scratch marks gradually enlarge during long-term use and eventually lead to product breakage, leading to a severe reduction in the service life of the product, meanwhile, the manual cleaning work is carried out, the labor cost is high, and the manual work is needed to take materials from the die after the elastomer is molded, because the molded elastomer is mostly a large object, the demolding is difficult by manpower, and the molding can be carried out by cooperation of a plurality of persons, and the temperature of the elastomer which is just molded is high, which is easy to scald workers, and a large amount of heat can be directly emitted to the surrounding air through the elastomer, the invention further provides a high-molecular TPU polyurethane elastomer, which solves the problems of the temperature around a die, the severe working environment and the like.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a high-molecular TPU polyurethane elastomer which is prepared from the following raw materials in parts by weight:
30-40 parts of nano inorganic filler, 30-35 parts of polyether polyol, 10-20 parts of poly adipic acid-glycol ester dihydric alcohol, 15-20 parts of dioctyl phthalate, 20-30 parts of diisocyanate, 5-7 parts of polyether polyol, 5-3 parts of ultraviolet absorbent UV-92, 5-8 parts of 1, 4-cyclohexane diisocyanate, 4-5 parts of 1, 4-butanediol, 10103-5 parts of antioxidant, 1-2 parts of ultraviolet absorbent, 1-2 parts of flame retardant and 1-5 parts of stabilizer;
the elastomer prepared by the raw materials does not use any solvent in the preparation process, does not generate industrial three wastes, and completely realizes clean production, and the antioxidant property of the elastomer can be effectively improved by adopting a novel antioxidant ingredient formula;
the preparation method of the elastomer comprises the following steps:
s1: adding titanium dioxide powder, antimony trioxide, red phosphorus, tetrabromobisphenol A and 5: 2: 2.5: 1 into a high-speed stirrer at the mixing temperature of 30-60 ℃ for 60-70 min to obtain a flame retardant, and adding barium stearate and calcium stearate at the mixing weight ratio of 3: 2 into the high-speed stirrer at the normal temperature for 30-40 min to obtain a stabilizer;
s2: putting polyether polyol, poly adipic acid-glycol ester dihydric alcohol, dioctyl phthalate and diisocyanate into stirring equipment for mixing and stirring for 1-2h to obtain a first mixture after stirring is finished;
s3: putting polyether polyol, an ultraviolet absorbent UV-9, 1, 4-cyclohexane diisocyanate, 1, 4-butanediol, an antioxidant 1010 and a nano inorganic filler into stirring equipment, mixing and stirring for 1-2h, and obtaining a second mixture after stirring;
s4: putting the first mixture, the second mixture, the flame retardant and the stabilizer into stirring equipment for mixing and stirring for 1-2h, obtaining a raw material liquid after stirring is finished, injecting the raw material liquid into an automatic die, heating the automatic die at 50-80 ℃, and realizing automatic demolding through a demolding structure in the automatic die after curing and molding;
the method is simple and convenient to operate and easy to realize, a two-component system is used at the same time, the obtained product has good wear resistance, the nano inorganic filler is particularly adopted, the nano inorganic filler has the characteristics of high melting point, high hardness, wear resistance, corrosion resistance, good oxidation resistance and the like, the use effect is good, the product quality can be greatly improved, the formula cost is low, the method is green and environment-friendly, the preparation method is simple, and the large-scale production can be realized;
the automatic die used in the step S4 comprises a protection box, a bottom plate and a guide block; the protection box is designed into a cuboid structure; a working groove is formed in the protection box; an observation window is arranged on the front end face of the protection box; a glass cover is arranged inside the observation window; guide holes are formed in the left side surface and the right side surface of the protection box; the lower surface of the inside of the protection box is fixedly connected with a bottom plate; the upper surface of the bottom plate is fixedly connected with a lower die; the upper surface of the protection box is provided with a mounting hole; the inner part of the mounting hole is fixedly connected with a guide block; the lower surface of the guide block is provided with a guide groove; an upper die is connected inside the guide groove in a sliding manner; the bottom of the guide groove is fixedly connected with a hydraulic cylinder, and the hydraulic cylinder is fixedly connected with the upper surface of the upper die; grooves are formed in the lower surface of the upper die and the upper surface of the lower die; an elastic body is molded between the two grooves in a common mode; the upper surface of the guide block is fixedly connected with guide rails close to the front side and the rear side of the guide block; the upper surfaces of the two guide rails are both connected with guide blocks in a sliding manner; the rear surface of the shell is fixedly connected with a motor; the rear surface of the shell is rotatably connected with a rotating column at the position of the motor, and the rotating column is fixedly connected with an output shaft of the motor; a gear is fixedly connected to the outer arc surface of the rotating column above the guide block at the rear position; the upper surface of the guide block at the rear position is provided with a tooth groove, and the gear is in meshed connection with the tooth groove; the two guide blocks are connected with the same demoulding block in a vertical sliding mode; a guide cavity is formed in the demoulding body at a position right above the elastic body; the lower surface of the demoulding block is provided with suction holes which are uniformly distributed at the position right below the guide cavity, and the suction holes are used for communicating the guide cavity with the outside; uniformly arranged cutters are arranged on the lower surface of the demoulding body and close to the side surface of the elastic body; during operation, the production polymer TPU polyurethane elastomer, what adopt is the moulding method, among the prior art, can produce a large amount of flashes through moulding, and these flashes are not cleared away in time, can seriously influence the normal use in elastomer later stage, and the flash also influences finished product outward appearance simultaneously, and current solution is: the flash is removed one by manpower, the cleaning efficiency is low, the elastomer is in a soft state, the normal structure of the elastomer is very easy to scratch while the flash is removed, the scratch scars can be gradually enlarged in the long-term use process, and finally the product is cracked, so that the service life of the product is seriously reduced, meanwhile, the manual cleaning work is carried out, the labor cost is high, and when the elastomer is molded, the manpower is required to take materials from a mold, because the molded elastomer is mostly large, the demolding is difficult by manpower, the manual demolding is required to be carried out cooperatively, and the temperature of the elastomer which is just molded is high, so that workers are easy to scald, and a large amount of heat can be directly emitted to the ambient air through the elastomer, so that the ambient temperature of the mold and the working environment are poor, and the like, through the macromolecular TPU polyurethane elastomer, when an elastomer product needs to be molded, firstly, the upper die and the lower die are matched, a cavity is formed through the grooves of the upper die and the lower die, the formation of the elastomer is realized, after the formation of the elastomer is completed, a piston rod of a hydraulic cylinder is upwards recovered, then the upper die is driven to move upwards, the elastomer is made to leak out of the die, at the moment, a motor is started, the rotation of the motor can drive a rotation column to rotate, the rotation column further drives a gear to rotate, through the mutual meshing between the gear and a tooth groove, the surface sliding of a guide block on a corresponding guide rail is realized, the guide block further drives a demoulding block to move to a position right above the elastomer, through the up-and-down movement of a demoulding block, the demoulding block is in direct contact with the upper surface of the elastomer, the elastomer is uniformly sucked through a suction hole, meanwhile, the flash on the periphery, the automatic demolding device has the advantages that the demolding of the elastic body is realized, the automatic leading-out of the elastic body is realized through the movement of the guide block, the automatic demolding of the elastic body is effectively realized, meanwhile, the mechanical flash removal can be realized in the automatic demolding process, the allocation of workers in the production process is reduced, the labor cost is reduced, meanwhile, through stable mechanical operation, the quality of the prepared elastic body is stable, the surface of the elastic body cannot be scratched, and the service life of the elastic body is prolonged.
Preferably, the lower surface of the demoulding block is provided with mounting grooves at the position of the cutter; pressing blocks are arranged inside the mounting grooves; the inner part of each pressing block close to the elastomer is fixedly connected with a cutter, and the cutting edge of each cutter is higher than the lower surface of the corresponding pressing block; the during operation, through setting up the briquetting, through setting up the cutter in the inside of briquetting, through the upper surface direct contact of briquetting directness and lower mould, because the cutting edge of cutter is higher than the lower surface of briquetting, behind the briquetting extrusion elastomer, can make the automatic and cutter between the contact cutting of elastomer, avoided the surperficial direct contact of cutter with the mould, the easy fish tail mould of long-term cutting edge, and then aggravate the flash problem easily.
Preferably, the side surfaces of the inner part of the mounting groove, which are far away from the elastic body, are fixedly connected with first telescopic rods; the pressing blocks are connected in the corresponding mounting grooves in a sliding mode, the moving direction of each pressing block is perpendicular to the corresponding surface of the elastic body, and the pressing blocks are fixedly connected with the corresponding piston rods of the first telescopic rods; during operation, through setting up first telescopic link, can drive the briquetting through the flexible of first telescopic link and remove, and then the alternate segregation between pulling flash and the elastomer body structure, it is not abundant to have avoided the cutter to cut absolutely, appears the local phenomenon of connecting.
Preferably, the left side surface and the right side surface of the demoulding block are fixedly connected with cleaning blocks; the lower surfaces of the two cleaning blocks are fixedly connected with suction pipes which are uniformly arranged, and the suction pipes are communicated with a negative pressure source; the during operation, through setting up the clearance piece, the lower surface through the clearance piece has linked firmly the straw, through the straw, can effectually adsorb the clearance to the flash of cutting off, avoids a large amount of flashes to pile up in the inside of guard box.
Preferably, the side faces of the opposite sides of the two adjacent pressing blocks are fixedly connected with breaking knives, and the heights of the cutting edges of the breaking knives are the same as those of the cutting edges of the cutters and are higher than the lower surfaces of the pressing blocks; during operation, through setting up the disconnected sword of dividing, can carry out effectual cutting to the flash of cutting off through dividing disconnected sword, reduce the size of flash, not only make the flash more easily by the pulling to with the elastomer between separate, the small-size flash quality after cutting is lighter moreover, is favorable to the absorption of straw.
Preferably, the lower surface of the demoulding block is fixedly connected with the side surface of the lower mould; the side surface of the fixed block, which is opposite to one side of the lower die, is provided with a guide groove; the guide grooves are internally and respectively connected with a righting block in a sliding way; the bottoms of the guide grooves are fixedly connected with second telescopic rods; the piston rods of the second telescopic rods are fixedly connected with the corresponding righting blocks; the during operation, through setting up the second telescopic link, can drive through the flexible of second telescopic link and right the piece and slide in the inside of guide slot, can right the elastomer through right the piece, glue the elastomer when avoiding going up the mould separation for the elastomer appears the part and takes off the membrane or the slope problem, if do not right the operation, takes off the membrane piece and when moving down the connection elastomer, crushes the elastomer easily, leads to the elastomer to damage.
Preferably, the lower surface of the demoulding block is provided with avoidance grooves which are uniformly distributed at the position of the lower mould; third telescopic rods are fixedly connected inside the avoidance grooves and are communicated with the corresponding second telescopic rods; during operation, through setting up the third telescopic link, when the demoulding piece downstream, the piston rod of third telescopic link can be extruded by the lower mould for the piston rod adduction of third telescopic link, and then the inside gas of third telescopic link enters into the inside of second telescopic link, makes the second telescopic link retrieve, avoids rightting the piece and takes off and produce the motion between the piece and interfere the problem.
Preferably, the side surfaces of the centralizing blocks, which are opposite to one side of the elastic body, are fixedly connected with cushion blocks; the cushion block is made of soft rubber materials; during operation, through setting up the cushion, through the soft materials design of cushion for the soft contact between piece and the elastomer is right in the reduction and the influence of rightting the in-process to the elastomer.
Preferably, the positions, close to the lower surface of the demoulding block, inside the suction holes are fixedly connected with elastic membranes; during operation, the elastic membrane is arranged in the suction hole, the pressure inside the guide cavity is adjusted, and then the elastic membrane is deformed, the adsorption and separation on the surface of the elastic body are realized, the suction hole is prevented from being in an open state, and the phenomenon that a large amount of flash materials separated out enter the suction hole to block the suction hole is avoided.
Preferably, the lower surfaces of the two cleaning blocks are fixedly connected with air nozzles, and the air nozzles and the suction pipes are alternately arranged; during operation, through setting up the jet head, can clear up the groove of lower membrane through the jet head, avoid the flash of cutting off to fall into the inside in groove, and then influence the quality of moulding the product next time.
Preferably, the lower surface of the air nozzle is fixedly connected with a rotary nozzle; the lower surface of the rotary spray head is provided with a straight spray hole; the side surface of the rotary spray head is provided with inclined spray holes which are uniformly distributed; during operation, the rotating nozzle is connected through rotating below the air nozzle, and the rotating nozzle rotates through the gas sprayed from the inclined spraying holes, so that the effective cleaning of angles of all positions of the lower die is realized through the rotation of the rotating nozzle, and the cleaning effect is improved.
The invention has the following beneficial effects:
1. according to the high-molecular TPU polyurethane elastomer, through the automatic die used in the production process of the elastomer, the automatic demolding of the elastomer is effectively realized through the arrangement of the protection box, the bottom plate and the guide block, meanwhile, in the automatic demolding process, the mechanical flash removal can be realized, the allocation of workers in the production process is reduced, the labor cost is reduced, meanwhile, through stable mechanical operation, the quality of the prepared elastomer is stable, the surface scratch of the elastomer can not occur, the service life of the elastomer is prolonged, and the elastomer is low in formula raw material cost, green, environment-friendly, simple in preparation method and capable of being produced in a large scale.
2. According to the high-molecular TPU polyurethane elastomer, the automatic die used in the production process of the elastomer is provided with the righting block, the second telescopic rod and the third telescopic rod; when the demoulding piece downstream, the piston rod of third telescopic link can be extruded by the lower mould for the piston rod adduction of third telescopic link, and then the inside gas of third telescopic link enters into the inside of second telescopic link, makes the second telescopic link retrieve, avoids rightting and produces the motion interference problem between piece and the demoulding piece, and the piece of righting simultaneously can realize righting the elastomer of tilt state.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a perspective view of an automated mold used in the present invention;
FIG. 3 is a top view of an automated mold used in the present invention;
FIG. 4 is a right side view of an automated mold used in the present invention;
FIG. 5 is a cross-sectional view taken at A-A of FIG. 3;
FIG. 6 is a partial enlarged view at B in FIG. 5;
in the figure: the device comprises a protection box 1, a suction pipe 11, a motor 12, a rotating column 13, a gear 14, a guide block 15, a bottom plate 2, a lower die 21, an upper die 22, an elastic body 23, a guide block 3, a demoulding block 31, a cutter 32, a pressing block 33, a first telescopic rod 34, a breaking cutter 35, a righting block 36, a second telescopic rod 37, a third telescopic rod 38, a cushion block 39, an elastic film 310 and an air nozzle 311.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to fig. 6, the high molecular TPU polyurethane elastomer of the present invention is composed of the following raw materials by weight:
30-40 parts of nano inorganic filler, 30-35 parts of polyether polyol, 10-20 parts of poly adipic acid-glycol ester dihydric alcohol, 15-20 parts of dioctyl phthalate, 20-30 parts of diisocyanate, 5-7 parts of polyether polyol, 5-3 parts of ultraviolet absorbent UV-92, 5-8 parts of 1, 4-cyclohexane diisocyanate, 4-5 parts of 1, 4-butanediol, 10103-5 parts of antioxidant, 1-2 parts of ultraviolet absorbent, 1-2 parts of flame retardant and 1-5 parts of stabilizer;
the elastomer prepared by the raw materials does not use any solvent in the preparation process, does not generate industrial three wastes, and completely realizes clean production, and the antioxidant property of the elastomer can be effectively improved by adopting a novel antioxidant ingredient formula, so that the novel TPU elastomer 23 disclosed by the invention has good shock resistance and wear resistance while ensuring high temperature resistance and good toughness;
the preparation method of the elastomer comprises the following steps:
s1: adding titanium dioxide powder, antimony trioxide, red phosphorus, tetrabromobisphenol A and 5: 2: 2.5: 1 into a high-speed stirrer at the mixing temperature of 30-60 ℃ for 60-70 min to obtain a flame retardant, and adding barium stearate and calcium stearate at the mixing weight ratio of 3: 2 into the high-speed stirrer at the normal temperature for 30-40 min to obtain a stabilizer;
s2: putting polyether polyol, poly adipic acid-glycol ester dihydric alcohol, dioctyl phthalate and diisocyanate into stirring equipment for mixing and stirring for 1-2h to obtain a first mixture after stirring is finished;
s3: putting polyether polyol, an ultraviolet absorbent UV-9, 1, 4-cyclohexane diisocyanate, 1, 4-butanediol, an antioxidant 1010 and a nano inorganic filler into stirring equipment, mixing and stirring for 1-2h, and obtaining a second mixture after stirring;
s4: putting the first mixture, the second mixture, the flame retardant and the stabilizer into stirring equipment for mixing and stirring for 1-2h, obtaining a raw material liquid after stirring is finished, injecting the raw material liquid into an automatic die, heating the automatic die at 50-80 ℃, and realizing automatic demolding through a demolding structure in the automatic die after curing and molding;
the method is simple and convenient to operate and easy to realize, a two-component system is used at the same time, the obtained product has good wear resistance, the nano inorganic filler is particularly adopted, the nano inorganic filler has the characteristics of high melting point, high hardness, wear resistance, corrosion resistance, good oxidation resistance and the like, the use effect is good, the product quality can be greatly improved, the formula cost is low, the method is green and environment-friendly, the preparation method is simple, and the large-scale production can be realized;
the automatic die used in the step S4 comprises a protection box 1, a bottom plate 2 and a guide block 3; the protection box 1 is designed into a cuboid structure; a working groove is formed in the protection box 1; an observation window is arranged on the front end face of the protection box 1; a glass cover is arranged inside the observation window; guide holes are formed in the left side surface and the right side surface of the protection box 1; the lower surface of the inside of the protection box 1 is fixedly connected with a bottom plate 2; the upper surface of the bottom plate 2 is fixedly connected with a lower die 21; the upper surface of the protection box 1 is provided with a mounting hole; the inside of the mounting hole is fixedly connected with a guide block 15; the lower surface of the guide block 15 is provided with a guide groove; an upper die 22 is connected inside the guide groove in a sliding manner; a hydraulic cylinder is fixedly connected to the bottom of the guide groove and is fixedly connected with the upper surface of the upper die 22; grooves are formed in the lower surface of the upper die 22 and the upper surface of the lower die 21; an elastic body 23 is molded between the two grooves in a common mode; the upper surface of the guide block 3 is fixedly connected with guide rails at the positions close to the front side and the rear side of the guide block 3; the upper surfaces of the two guide rails are both connected with guide blocks 3 in a sliding manner; the rear surface of the shell is fixedly connected with a motor 12; the rear surface of the shell is rotatably connected with a rotating column 13 at the position of the motor 12, and the rotating column 13 is fixedly connected with an output shaft of the motor 12; a gear 14 is fixedly connected to the outer arc surface of the rotating column 13 above the guide block 3 at the rear position; the upper surface of the guide block 3 at the rear position is provided with a tooth groove, and the gear 14 is in meshed connection with the tooth groove; the two guide blocks 3 are connected with the same demoulding block 31 in a vertical sliding manner; a guide cavity is arranged in the demoulding block 31 at a position right above the elastic body 23; the lower surface of the demoulding block 31 is provided with suction holes which are uniformly distributed at the position right below the guide cavity, and the suction holes are used for communicating the guide cavity with the outside; the lower surface of the demoulding block 31 is provided with uniformly arranged cutters 32 close to the side surface of the elastic body 23; during operation, the production polymer TPU polyurethane elastomer adopts the molding method, and in the prior art, a large amount of flash can be generated through molding, and the flash can not be removed in time, can seriously affect the normal use of the elastomer 23 at the later stage, and simultaneously the flash also affects the appearance of a finished product, and the prior solution is as follows: the flash is removed one by manpower, the cleaning efficiency is low, the elastomer 23 is in a soft state, the normal structure of the elastomer 23 is very easy to scratch while the flash is removed, the scratch scars can be gradually enlarged in the long-term use process, and finally the product is broken, so that the service life of the product is seriously reduced, meanwhile, the manual cleaning work is carried out, the labor cost is high, meanwhile, after the elastomer 23 is molded, the manpower is required to take materials from a mold, because the molded elastomer 23 is mostly large objects, the manual demolding is difficult, the manual demolding is required to be carried out in a cooperation mode, and the temperature of the elastomer 23 just molded is high, so that workers are easily scalded, and a large amount of heat can be directly emitted into the surrounding air through the elastomer 23, so that the temperature around the mold is caused, the working environment is bad and the like, through the high-molecular TPU polyurethane elastomer, when the elastic body 23 product needs to be molded, firstly, the upper die 22 and the lower die 21 are matched, the cavities are formed by the upper die 22 and the lower die 21, the forming of the elastic body 23 is realized, after the forming of the elastic body 23 is completed, the piston rod of the hydraulic cylinder is upwards recovered, and then the upper die 22 is driven to upwards move, so that the elastic body 23 leaks out of the die, at the moment, by starting the motor 12, the motor 12 rotates to drive the rotating column 13 to rotate, the rotating column 13 further drives the gear 14 to rotate, through the mutual meshing between the gear 14 and the tooth space, the surface sliding of the guide block 3 on the corresponding guide rail is realized, the guide block 3 further drives the demoulding block 31 to move to the position right above the elastic body 23, through the up-down movement of the demoulding block 31, the demoulding block 31 is directly contacted with the upper surface of the elastic body 23, and then the elastic body 23 is uniformly sucked through the sucking hole, meanwhile, the demoulding of the elastic body 23 is realized through the upward movement of the demoulding block 31, and then the automatic guiding of the elastic body 23 is realized through the movement of the guide block 3, so that the automatic demoulding of the elastic body 23 is effectively realized, meanwhile, in the automatic demoulding process, the mechanized flash removal can be realized, the allocation of workers in the production process is reduced, the labor cost is reduced, meanwhile, through the stable mechanical operation, the quality of the prepared elastic body 23 is stable, the surface scratch of the elastic body 23 cannot occur, and the service life of the elastic body 23 is prolonged.
As an embodiment of the present invention, the lower surface of the demoulding block 31 is provided with mounting grooves at the position of the cutting knife 32; pressing blocks 33 are arranged inside the mounting grooves; the position, close to the elastic body 23, inside each pressing block 33 is fixedly connected with a cutter 32, and the cutting edge of each cutter 32 is higher than the lower surface of the corresponding pressing block 33; the during operation, through setting up briquetting 33, through setting up cutter 32 in the inside of briquetting 33, through the direct upper surface direct contact with lower mould 21 of briquetting 33, because cutter 32's cutting edge is higher than briquetting 33's lower surface, behind briquetting 33 extrusion elastomer 23, can make the automatic and cutter 32 of elastomer 23 between contact cutting, avoided the surperficial direct contact of cutter 32 with the mould, the easy fish tail mould of long-term cutting edge, and then the flash problem aggravates easily.
As an embodiment of the invention, the side surfaces of the inner part of the mounting groove, which are far away from the elastic body 23, are fixedly connected with first telescopic rods 34; the pressing blocks 33 are all connected in the corresponding mounting grooves in a sliding manner, the moving direction of each pressing block 33 is perpendicular to the corresponding surface of the elastic body 23, and the pressing blocks 33 are fixedly connected with the piston rods of the corresponding first telescopic rods 34; during operation, through setting up first telescopic link 34, can drive briquetting 33 through the flexible of first telescopic link 34 and remove, and then the alternate segregation between pulling flash and the elastomer 23 body structure, it is not abundant to have avoided cutter 32 to cut absolutely, appears the local phenomenon of connecting.
As an embodiment of the present invention, the left and right side surfaces of the stripping module 31 are fixedly connected with cleaning blocks; the lower surfaces of the two cleaning blocks are fixedly connected with suction pipes 11 which are uniformly arranged, and the suction pipes 11 are communicated with a negative pressure source; during operation, through setting up the clearance piece, the lower surface through the clearance piece has linked firmly straw 11, through straw 11, can effectually adsorb the clearance to the flash of cutting off, avoids a large amount of flashes to pile up in protection box 1's inside.
As an embodiment of the invention, the opposite side surfaces of two adjacent press blocks 33 are fixedly connected with a breaking knife 35, and the heights of the cutting edges of the breaking knives 35 are the same as the height of the cutting edge of the cutter 32 and are higher than the lower surface of the press block 33; during operation, through setting up the breaking knife 35, can carry out effectual cutting to the flash of cutting off through breaking knife 35, reduce the size of flash, not only make the flash more easily pulled to with the elastomer 23 between separate, the small-size flash quality after cutting is lighter moreover, is favorable to the absorption of straw 11.
As an embodiment of the present invention, the lower surface of the stripping module 31 is fixedly connected to the side surface of the lower mold 21; the side face of the fixed block, which is opposite to one side face of the lower die 21, is provided with a guide groove; the guide grooves are internally and slidably connected with righting blocks 36; the bottoms of the guide grooves are fixedly connected with second telescopic rods 37; the piston rods of the second telescopic rods 37 are fixedly connected with the corresponding righting blocks 36; the during operation, through setting up second telescopic link 37, the flexible piece 36 that can drive through second telescopic link 37 of rightting slides in the inside of guide slot, can right elastomer 23 through righting piece 36, adhesion elastomer 23 when avoiding going up the separation of mould 22 for elastomer 23 appears the part and takes off the membrane or the slope problem, if do not right the operation, when taking off membrane piece downstream connection elastomer 23, crush elastomer 23 easily, lead to the elastomer 23 to damage.
As an embodiment of the present invention, the lower surface of the stripping module 31 is provided with avoiding grooves uniformly arranged at the position of the lower mold 21; the insides of the avoidance grooves are fixedly connected with third telescopic rods 38, and the third telescopic rods 38 are communicated with the corresponding second telescopic rods 37; during operation, through setting up third telescopic link 38, when the piece downstream that strips, the piston rod of third telescopic link 38 can be extruded by lower mould 21 for the piston rod adduction of third telescopic link 38, and then the inside gas of third telescopic link 38 enters into the inside of second telescopic link 37, makes second telescopic link 37 retrieve, avoids righting the piece 36 and strips and produce the motion between the piece and interfere the problem.
As an embodiment of the invention, the lateral positions of the centralizing blocks 36 on one side relative to the elastic body 23 are fixedly connected with cushion blocks 39; the cushion block 39 is made of soft rubber; during operation, through setting up cushion 39, through the soft material design of cushion 39 for soft contact between piece 36 and the elastomer 23 rights, reduces the influence to elastomer 23 in the process of righting.
As an embodiment of the present invention, the inner portion of the suction hole is fixedly connected with the elastic membrane 310 at a position close to the lower surface of the demoulding block 31; during operation, through setting up elastic membrane 310 in the inside in inhaling the hole, lead the inside pressure in chamber through adjusting, and then make elastic membrane 310 take place deformation, realize 23 surperficial absorption and separation of elastomer, avoided inhaling the hole and be uncovered state, avoid a large amount of flash of separating out to enter into the inside of inhaling the hole, lead to inhaling the hole jam problem.
As an embodiment of the invention, the lower surfaces of the two cleaning blocks are fixedly connected with air nozzles 311, and the air nozzles 311 and the suction pipes 11 are alternately arranged; during operation, through setting up the jet head 311, can clear up the groove of lower membrane through the jet head 311, avoid the flash of cutting off to fall into the inside in groove, and then influence the quality of moulding the product next time.
As an embodiment of the present invention, a rotary nozzle is fixedly connected to a lower surface of the showerhead 311; the lower surface of the rotary spray head is provided with a straight spray hole; the side surface of the rotary spray head is provided with inclined spray holes which are uniformly distributed; during operation, the rotating nozzle is connected through rotating below the gas nozzle 311, and the rotating nozzle rotates through gas sprayed from the inclined spraying holes, so that effective cleaning of all position angles of the lower die 21 is realized through rotation of the rotating nozzle, and the cleaning effect is improved.
The specific working process is as follows:
when the working is carried out, when the elastomer 23 product is required to be molded, firstly, the upper die 22 and the lower die 21 are matched, the cavities are formed through the grooves of the upper die 22 and the lower die 21, the forming cavity is formed jointly, the forming of the elastomer 23 is realized, after the elastomer 23 is formed, the piston rod of the hydraulic cylinder is upwards recycled, the upper die 22 is further driven to move upwards, the elastomer 23 is made to leak out of the die, at the moment, the motor 12 is started to rotate to drive the rotating column 13 to rotate, the rotating column 13 further drives the gear 14 to rotate, through the mutual meshing between the gear 14 and the tooth groove, the surface sliding of the guide block 3 on the corresponding guide rail is realized, the guide block 3 further drives the demoulding block 31 to move to the position right above the elastomer 23, through the up-and-down movement of the demoulding block 31, the direct contact between the demoulding block 31 and the upper surface of, the flash around the elastic body 23 is cut off by the cutter 32, the demoulding of the elastic body 23 is realized by the upward movement of the demoulding block 31, and then the automatic leading-out of the elastic body 23 is realized by the movement of the guide block 3; by arranging the pressing block 33, the cutter 32 is arranged inside the pressing block 33, the pressing block 33 is directly contacted with the upper surface of the lower die 21, and the cutting edge of the cutter 32 is higher than the lower surface of the pressing block 33, so that the elastic body 23 is automatically contacted and cut with the cutter 32 after the pressing block 33 extrudes the elastic body 23, the direct contact between the cutter 32 and the surface of the die is avoided, the die is easily scratched by the cutting edge for a long time, and the flash problem is easily aggravated; by arranging the first telescopic rod 34, the pressing block 33 is driven to move through the extension and retraction of the first telescopic rod 34, so that the flash is pulled to be separated from the body structure of the elastic body 23, and the phenomenon that the cutter 32 is insufficient in cutting and local connection is avoided; by arranging the cleaning block, the suction pipe 11 is fixedly connected to the lower surface of the cleaning block, and the cut-off flash can be effectively adsorbed and cleaned through the suction pipe 11, so that a large amount of flash is prevented from being accumulated in the protective box 1; by arranging the breaking knife 35, the broken flash can be effectively cut by the breaking knife 35, the size of the flash is reduced, the flash is easier to pull and separate from the elastic body 23, and the small-size flash after being cut is lighter in weight and is beneficial to the suction of the suction pipe 11; by arranging the second telescopic rod 37, the righting block 36 can be driven to slide in the guide groove by the extension and retraction of the second telescopic rod 37, the elastic body 23 can be righted by the righting block 36, the elastic body 23 is prevented from being adhered when the upper die 22 is separated, so that the elastic body 23 is partially stripped or inclined, and if the righting operation is not carried out, the elastic body 23 is easily crushed when the stripping block moves downwards to be connected with the elastic body 23, so that the elastic body 23 is damaged; by arranging the third telescopic rod 38, when the demoulding block moves downwards, a piston rod of the third telescopic rod 38 is extruded by the lower die 21, so that the piston rod of the third telescopic rod 38 is retracted, and then the gas in the third telescopic rod 38 enters the second telescopic rod 37, so that the second telescopic rod 37 is recovered, and the problem of motion interference between the righting block 36 and the demoulding block is avoided; by arranging the cushion block 39 and designing the soft material of the cushion block 39, the centering block 36 is in soft contact with the elastic body 23, and the influence on the elastic body 23 in the centering process is reduced; the elastic membrane 310 is arranged in the suction hole, and the elastic membrane 310 is deformed by adjusting the pressure in the guide cavity, so that the surface of the elastic body 23 is adsorbed and separated, the suction hole is prevented from being in an open state, and the problem of suction hole blockage caused by the fact that a large amount of separated flash enters the suction hole is avoided; by arranging the gas nozzle 311, the groove of the lower film can be cleaned through the gas nozzle 311, so that the phenomenon that cut flash falls into the groove is avoided, and the quality of the next molded product is influenced; the rotating nozzle is connected to rotate below the gas nozzle 311, gas sprayed from the inclined nozzle holes rotates, and effective cleaning of the lower die 21 at each position and angle is achieved through rotation of the rotating nozzle, so that cleaning effect is improved.
While there have been shown and described what are at present considered the fundamental principles of the invention, its essential features and advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims (11)

1. A macromolecule TPU polyurethane elastomer is characterized in that: the elastomer is prepared from the following raw materials in parts by weight:
30-40 parts of nano inorganic filler, 30-35 parts of polyether polyol, 10-20 parts of poly adipic acid-glycol ester dihydric alcohol, 15-20 parts of dioctyl phthalate, 20-30 parts of diisocyanate, 5-7 parts of polyether polyol, 5-3 parts of ultraviolet absorbent UV-92, 5-8 parts of 1, 4-cyclohexane diisocyanate, 4-5 parts of 1, 4-butanediol, 10103-5 parts of antioxidant, 1-2 parts of ultraviolet absorbent, 1-2 parts of flame retardant and 1-5 parts of stabilizer;
the preparation method of the elastomer comprises the following steps:
s1: adding titanium dioxide powder, antimony trioxide, red phosphorus, tetrabromobisphenol A and 5: 2: 2.5: 1 into a high-speed stirrer at the mixing temperature of 30-60 ℃ for 60-70 min to obtain a flame retardant, and adding barium stearate and calcium stearate at the mixing weight ratio of 3: 2 into the high-speed stirrer at the normal temperature for 30-40 min to obtain a stabilizer;
s2: putting polyether polyol, poly adipic acid-glycol ester dihydric alcohol, dioctyl phthalate and diisocyanate into stirring equipment for mixing and stirring for 1-2h to obtain a first mixture after stirring is finished;
s3: putting polyether polyol, an ultraviolet absorbent UV-9, 1, 4-cyclohexane diisocyanate, 1, 4-butanediol, an antioxidant 1010 and a nano inorganic filler into stirring equipment, mixing and stirring for 1-2h, and obtaining a second mixture after stirring;
s4: putting the first mixture, the second mixture, the flame retardant and the stabilizer into stirring equipment for mixing and stirring for 1-2h, obtaining a raw material liquid after stirring is finished, injecting the raw material liquid into an automatic die, heating the automatic die at 50-80 ℃, and realizing automatic demolding through a demolding structure in the automatic die after curing and molding;
the automatic die used in the S4 comprises a protection box (1), a bottom plate (2) and a guide block (3); the protection box (1) is designed into a cuboid structure; a working groove is formed in the protection box (1); an observation window is arranged on the front end face of the protection box (1); a glass cover is arranged inside the observation window; guide holes are formed in the left side surface and the right side surface of the protection box (1); the lower surface of the inside of the protection box (1) is fixedly connected with a bottom plate (2); the upper surface of the bottom plate (2) is fixedly connected with a lower die (21); the upper surface of the protection box (1) is provided with a mounting hole; a guide block (15) is fixedly connected inside the mounting hole; the lower surface of the guide block (15) is provided with a guide groove; an upper die (22) is connected to the inner part of the guide groove in a sliding manner; the bottom of the guide groove is fixedly connected with a hydraulic cylinder, and the hydraulic cylinder is fixedly connected with the upper surface of the upper die (22); grooves are formed in the lower surface of the upper die (22) and the upper surface of the lower die (21); an elastic body (23) is molded between the two grooves in a common mode; the upper surface of the guide block (3) is fixedly connected with guide rails at the positions close to the front side and the rear side of the guide block (3); the upper surfaces of the two guide rails are both connected with guide blocks (3) in a sliding manner; the rear surface of the shell is fixedly connected with a motor (12); the rear surface of the shell is rotatably connected with a rotating column (13) at the position of the motor (12), and the rotating column (13) is fixedly connected with an output shaft of the motor (12); a gear (14) is fixedly connected to the outer arc surface of the rotating column (13) above the guide block (3) at the rear position; the upper surface of the guide block (3) at the rear position is provided with a tooth groove, and the gear (14) is meshed with the tooth groove; the two guide blocks (3) are connected with the same demoulding block (31) in a vertical sliding manner; a guide cavity is formed in the demoulding body (31) at a position right above the elastic body (23); the lower surface of the demoulding block (31) is provided with suction holes which are uniformly distributed at the position right below the guide cavity, and the suction holes are used for communicating the guide cavity with the outside; the side surface of the lower surface of the demoulding block (31) close to the elastic body (23) is provided with uniformly arranged cutters (32).
2. A polymeric TPU polyurethane elastomer, as claimed in claim 1, wherein: mounting grooves are formed in the lower surface of the demoulding block (31) at the position of the cutting knife (32); pressing blocks (33) are arranged inside the mounting grooves; the position of the inner part of each pressing block (33) close to the elastic body (23) is fixedly connected with a cutter (32), and the cutting edge of each cutter (32) is higher than the lower surface of the corresponding pressing block (33).
3. A polymeric TPU polyurethane elastomer, as claimed in claim 2, wherein: the side surfaces of the inner part of the mounting groove, which are far away from the elastic body (23), are fixedly connected with first telescopic rods (34); the pressing blocks (33) are connected in the corresponding mounting grooves in a sliding mode, the moving direction of each pressing block (33) is perpendicular to the corresponding surface of the elastic body (23), and the pressing blocks (33) are fixedly connected with the piston rods of the corresponding first telescopic rods (34).
4. A polymeric TPU polyurethane elastomer, as claimed in claim 1, wherein: the left side surface and the right side surface of the demoulding block (31) are fixedly connected with cleaning blocks; two the lower surface of clearance piece all links firmly straw (11) of evenly arranging, and communicates each other between straw (11) and the negative pressure source.
5. A polymeric TPU polyurethane elastomer as claimed in claim 4 wherein: the side surfaces of the two opposite sides of the two adjacent pressing blocks (33) are fixedly connected with breaking knives (35), and the heights of the cutting edges of the breaking knives (35) are the same as those of the cutting edges of the cutters (32) and are higher than the lower surfaces of the pressing blocks (33).
6. A polymeric TPU polyurethane elastomer, as claimed in claim 1, wherein: the lower surface of the demoulding block (31) is fixedly connected with the side surface of the lower mould (21); the side surfaces of the fixed blocks, which are opposite to one side of the lower die (21), are provided with guide grooves; the inner parts of the guide grooves are all connected with righting blocks (36) in a sliding manner; the bottoms of the guide grooves are fixedly connected with second telescopic rods (37); and piston rods of the second telescopic rods (37) are fixedly connected with the corresponding righting blocks (36).
7. A polymeric TPU polyurethane elastomer as claimed in claim 6 wherein: avoidance grooves which are uniformly distributed are formed in the lower surface of the demoulding block (31) at the position of the lower die (21); the inside of dodging the groove all has linked firmly third telescopic link (38), and communicates each other between third telescopic link (38) and corresponding second telescopic link (37).
8. A polymeric TPU polyurethane elastomer as claimed in claim 6 wherein: the positions of the side surfaces of the centralizing blocks (36) opposite to one side of the elastic body (23) are fixedly connected with cushion blocks (39); the cushion block (39) is made of soft rubber materials.
9. A polymeric TPU polyurethane elastomer, as claimed in claim 1, wherein: and elastic membranes (310) are fixedly connected to the inner parts of the suction holes and the positions, close to the lower surface of the demoulding block (31).
10. A polymeric TPU polyurethane elastomer as claimed in claim 4 wherein: the lower surfaces of the two cleaning blocks are fixedly connected with air nozzles (311), and the air nozzles (311) and the suction pipes (11) are alternately arranged.
11. A polymeric TPU polyurethane elastomer, as set forth in claim 10, characterized by: the lower surface of the air nozzle (311) is fixedly connected with a rotary spray head; the lower surface of the rotary spray head is provided with a straight spray hole; the side of the rotary spray head is provided with inclined spray holes which are uniformly distributed.
CN202010836025.0A 2020-08-19 2020-08-19 High-molecular TPU polyurethane elastomer Pending CN112094395A (en)

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