CN115782094B - Reverse air-cooled molding injection molding process and daily meal box molded by adopting same - Google Patents
Reverse air-cooled molding injection molding process and daily meal box molded by adopting same Download PDFInfo
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- CN115782094B CN115782094B CN202310043254.0A CN202310043254A CN115782094B CN 115782094 B CN115782094 B CN 115782094B CN 202310043254 A CN202310043254 A CN 202310043254A CN 115782094 B CN115782094 B CN 115782094B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention relates to a reverse air cooling molding injection molding process and a daily meal box molded by adopting the injection molding process, wherein the reverse air cooling molding injection molding process comprises the following steps of: step one, screening plastic particles by using a rotary screen; inputting the treated raw materials into an injection molding device, and performing hot melting on the raw materials by a heating module on the injection molding device to convert plastic particles into fluid in a molten state; step three, the control device drives the molding module to form an injection molding cavity, and the injection molding device injects raw materials in a molten state into the injection molding cavity; step four, cooling, wherein the control device drives the forming module to reset, so as to finish demoulding; and fifthly, the air blowing device reversely blows the demoulded product to finish secondary cooling, and finally, the cutlery box can stably drop onto the transmission device, so that the follow-up processing procedure is convenient to carry out, workers are not required to put the demoulded product again, and the automation of product production is realized.
Description
Technical Field
The invention relates to the technical field of injection molding, in particular to a reverse air cooling molding injection molding process and a daily meal box molded by adopting the injection molding process.
Background
In daily life, tableware (cutlery boxes) are various in variety, and some of them are manufactured by injection molding, and plastic injection molding is generally used. Injection molding machines are the primary molding equipment for molding thermoplastic or thermoset materials into plastic articles of various shapes using plastic molding dies, and injection molding is accomplished by injection molding machines and dies.
However, the existing injection molding process is applied to actual production, products are often subjected to incomplete cooling and molding after demolding, so that the products are deformed, the reject ratio of the products is increased, and for this purpose, cooling measures after demolding can be added, the products after demolding are further cooled by blowing air, but most of the products fall randomly during demolding, so that the stability of the products in falling is difficult to ensure, and therefore the products cannot directly enter the next processing flow, and the products are rearranged by staff, so that the working strength is increased and the ideal production effect is not achieved.
Disclosure of Invention
The invention aims to provide a reverse air-cooled molding injection molding process and a daily meal box molded by the injection molding process, so as to solve the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: the reverse air-cooled molding injection molding process comprises the following steps:
screening plastic particle raw materials by using a rotary screen to remove dust, sundries and the like doped in the raw materials;
inputting the raw materials subjected to screening treatment into an injection molding device, and carrying out hot melting on the raw materials by a heating module on the injection molding device, so that plastic particles are converted into fluid in a molten state, and keeping the heating temperature within the range of 180-220 ℃;
step three, the control device drives the molding module to form an injection molding cavity, the injection molding device injects raw materials in a molten state into the injection molding cavity, the molten viscosity of the raw materials is kept within the range of 1500-2500 mPa.s, the injection molding pressure is kept within the range of 0.4-0.7MPa, and the holding pressure is 60-90 MPa;
step four, cooling, wherein the cooling temperature is 10-13 ℃, the cooling time is 3-5min, and the control device drives the forming module to reset to finish demoulding;
and fifthly, reversely blowing the demoulded product by the blowing device to finish secondary cooling, and transferring the product after the secondary cooling to a next processing production line.
As a further scheme of the invention: the injection molding device comprises an injection molding machine arranged on a base, wherein a transverse plate is fixedly arranged on the base, and a vertical plate is fixedly arranged on the transverse plate; the control device comprises a Maltese cross movement mechanism arranged on the vertical plate, a reciprocating driving mechanism connected with the Maltese cross movement mechanism and a turnover driving mechanism; the molding module comprises a first die movably arranged on one side of the vertical plate, facing the injection molding machine, and connected with the reciprocating driving mechanism, and a second die movably arranged on the transverse plate, wherein the second die is connected with an elastic supporting mechanism arranged on the base, and the reciprocating driving mechanism is used for driving the first die to move along the length direction of the transverse plate so as to enable the first die to be matched with the second die movably arranged on the transverse plate; the second die is provided with a blocking mechanism for switching the conduction and blocking states of the second die towards one side of the first die, and the maltese cross movement mechanism is used for driving the reciprocating driving mechanism to move with the overturning driving mechanism in sequence and triggering the blocking mechanism: when the reciprocating driving mechanism moves, the first die is driven to reciprocate along the length direction of the transverse plate, and in the process of carrying out one reciprocating movement of the first die, the plugging mechanism executes one switching action of conducting and plugging the second die, so that the first die is matched with the second die to form an injection molding cavity, and the injection molding cavity is driven to be connected with the injection molding machine; when the overturning driving mechanism moves, the second die is driven to overturn in a reciprocating manner, and the plugging mechanism is driven to execute switching actions of conducting and plugging states once again on the second die, so that the cutlery box in the second die drops onto the conveying device arranged on the base.
As still further aspects of the invention: the elastic supporting mechanism comprises a vertical plate fixedly arranged on the transverse plate and two rotating shafts movably arranged on one side of the vertical plate, which faces the second die, wherein the second die is fixed between the two rotating shafts, and one rotating shaft is connected with the overturning driving mechanism; the two rotating shafts are respectively connected with the vertical plate through a group of elastic telescopic components, each elastic telescopic component comprises a transverse rod arranged on the vertical plate in a sliding mode, a ring body fixed on the periphery of the transverse rod and a cylindrical spring sleeved on the periphery of the transverse rod, two ends of each cylindrical spring are respectively connected with the ring body and the vertical plate, and the rotating shafts are rotatably arranged at one ends of the transverse rod far away from the vertical plate.
As still further aspects of the invention: the vertical plate is fixedly provided with a discharging pipe connected with a discharging hole of the injection molding machine, one side, facing the vertical plate, of the second die is provided with a material guiding pipe matched with the discharging pipe, and the material guiding pipe is in butt joint with the discharging pipe at the tail end of the travel of the first die, facing the second die, so that a molten material in the injection molding machine is led into an injection molding passage in the injection molding cavity.
As still further aspects of the invention: the plugging mechanism comprises a bidirectional screw rod rotatably mounted on the second die and two transverse moving plates symmetrically arranged on the bidirectional screw rod and in threaded connection with the bidirectional screw rod, wherein each transverse moving plate is fixedly connected with a plugging plate for plugging the second die; the second die is further fixedly provided with a guide rod, the guide rod penetrates through the two transverse moving plates, the two transverse moving plates are in sliding connection with the guide rod, the bidirectional screw rod is further connected with a rotating shaft of a gear arranged on one side of the second die through a fourth transmission belt, the reciprocating driving mechanism is connected with a toothed plate, the gear is matched with the toothed plate, and the reciprocating driving mechanism is matched with a toothed ring fixedly arranged on the transverse moving plates.
As still further aspects of the invention: the maltese cross movement mechanism comprises a driving wheel, a first driven wheel, a second driven wheel and a driving motor, wherein the driving wheel, the first driven wheel and the second driven wheel are rotatably arranged on the vertical plate, and the driving motor is arranged on the vertical plate; the output end of the driving motor is connected with the rotating shaft of the driving wheel, the rotating shaft of the first driven wheel is connected with the reciprocating driving mechanism, and the rotating shaft of the second driven wheel is connected with the overturning driving mechanism.
As still further aspects of the invention: the reciprocating driving mechanism comprises two long rods fixedly arranged on the vertical plates, a moving plate slidably arranged on the two long rods and a cam rotatably arranged on the vertical plates, a rotating shaft of the cam is connected with a rotating shaft of the first driven wheel through a second bevel gear group and a first transmission belt, and the toothed plate is fixedly connected with the moving plate; the movable plate is fixed with one side of the first die, which is away from the second die, and two strip-shaped protrusions are fixed on the movable plate, a gap is reserved between the two strip-shaped protrusions, a cylinder is fixed on the cam, and the cylinder stretches into the gap and is in sliding connection with the two strip-shaped protrusions.
As still further aspects of the invention: the overturning driving mechanism comprises a first transmission shaft rotatably arranged on the vertical plate and a movable arm for connecting the first transmission shaft with the rotating shaft, and the first transmission shaft is connected with the rotating shaft of the second driven wheel through a first bevel gear group; the movable arm comprises a first connecting arm and a second connecting arm, the head ends of the first connecting arm and the second connecting arm are respectively connected with the first transmission shaft and the rotating shaft in a rotating mode, the tail ends of the first connecting arm and the second connecting arm are connected with each other in a rotating mode through a shaft piece, the shaft piece is connected with the first transmission shaft through a second transmission belt, and the shaft piece is connected with the rotating shaft through a third transmission belt.
As still further aspects of the invention: the transverse plate is provided with a through hole to form a passage for the cutlery box to fall down onto the conveying device, the bottom of the transverse plate is fixedly provided with a frame plate, the inside of the frame plate is hollow, the inner wall of the frame plate is obliquely provided with a plurality of air nozzles for collecting air flow, and the outer wall of the frame plate is provided with a connector connected with an external fan.
The daily cutlery box adopts the reverse air cooling shaping injection molding process for injection molding.
Compared with the prior art, the invention has the beneficial effects that: the invention has novel design, the reciprocating driving mechanism and the overturning driving mechanism are controlled to move through the maltese cross movement mechanism, and the plugging mechanism conducts and plugs the switching action on one side of the second die in the moving process of the reciprocating driving mechanism and the overturning driving mechanism, so that the cutlery box can be ensured to fall down in a stable posture, and further, the cutlery box can be stably fallen onto the transmission device, the follow-up processing procedure is convenient, the workers are not required to put the demoulded products again, the automation of product production is realized, and the injection molding process is suitable for popularization and use.
Drawings
FIG. 1 is an isometric view of one embodiment of a reverse air-cooled molding injection process;
FIG. 2 is a schematic diagram of an embodiment of a reverse air-cooled molding injection molding process;
FIG. 3 is a schematic view of an alternative embodiment of a reverse air-cooled molding injection molding process;
FIG. 4 is a schematic view of an alternative embodiment of a reverse air-cooled molding injection molding process;
FIG. 5 is an enlarged view of the structure at A in FIG. 3;
FIG. 6 is an enlarged view of the structure at B in FIG. 4;
FIG. 7 is an enlarged view of the structure at C in FIG. 4;
fig. 8 is an enlarged view of the structure at D in fig. 4;
FIG. 9 is a schematic diagram of a plugging mechanism and an elastic supporting mechanism in an embodiment of a reverse air-cooled molding injection molding process;
FIG. 10 is a schematic diagram showing a connection state of a Maltese cross movement mechanism and a turnover driving mechanism in an embodiment of a reverse air-cooled molding injection process;
fig. 11 is a schematic structural view of a reciprocating driving mechanism in an embodiment of a reverse air-cooled molding injection process.
In the figure: 1. a base; 2. a cross plate; 3. a riser; 4. a first mold; 5. a second mold; 6. an injection molding machine; 7. a transmission device; 8. a plugging plate; 9. a two-way screw rod; 10. a guide rod; 11. a transverse moving plate; 12. a vertical plate; 13. a rotating shaft; 14. a material guiding pipe; 15. a discharge pipe; 16. a cross bar; 17. a ring body; 18. a cylindrical spring; 19. a driving motor; 20. a driving wheel; 21. a first driven wheel; 22. a second driven wheel; 23. a first bevel gear set; 24. a first drive shaft; 25. a shaft member; 26. a first connecting arm; 27. a second connecting arm; 28. a first belt; 29. a second belt; 30. a third belt; 31. a moving plate; 32. a bar-shaped protrusion; 33. a cam; 34. a column; 35. a long rod; 36. a second bevel gear set; 37. a second drive shaft; 38. a fourth belt; 39. a gear; 40. a toothed plate; 41. a toothed ring; 42. and a frame plate.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In addition, an element in the present disclosure may be referred to as being "fixed" or "disposed" on another element or being directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
In the embodiment of the invention, the reverse air-cooled molding injection molding process comprises the following steps of:
screening plastic particle raw materials by using a rotary screen to remove dust, sundries and the like doped in the raw materials;
inputting the raw materials subjected to screening treatment into an injection molding device, and carrying out hot melting on the raw materials by a heating module on the injection molding device, so that plastic particles are converted into fluid in a molten state, and keeping the heating temperature within the range of 180-220 ℃;
step three, the control device drives the molding module to form an injection molding cavity, the injection molding device injects raw materials in a molten state into the injection molding cavity, the molten viscosity of the raw materials is kept within the range of 1500-2500 mPa.s, the injection molding pressure is kept within the range of 0.4-0.7MPa, and the holding pressure is 60-90 MPa;
step four, cooling, wherein the cooling temperature is 10-13 ℃, the cooling time is 3-5min, and the control device drives the forming module to reset to finish demoulding;
and fifthly, reversely blowing the demoulded product by the blowing device to finish secondary cooling, and transferring the product after the secondary cooling to a next processing production line.
Referring to fig. 1-11, the injection molding device comprises an injection molding machine 6 mounted on a base 1, wherein a transverse plate 2 is fixedly mounted on the base 1, and a vertical plate 3 is fixedly mounted on the transverse plate 2; the control device comprises a Maltese cross movement mechanism arranged on the vertical plate 3, and a reciprocating driving mechanism and a turnover driving mechanism which are connected with the Maltese cross movement mechanism; the molding module comprises a first die 4 movably arranged on one side of the vertical plate 3 facing the injection molding machine 6 and connected with the reciprocating driving mechanism, and a second die 5 movably arranged on the transverse plate 2, wherein the second die 5 is connected with an elastic supporting mechanism arranged on the base 1, and the reciprocating driving mechanism is used for driving the first die 4 to move along the length direction of the transverse plate 2 so as to enable the first die 4 to be matched with the second die 5 movably arranged on the transverse plate 2; the second mold 5 is provided with a blocking mechanism for switching on and blocking states of the second mold 5 towards one side of the first mold 4, and the maltese cross movement mechanism is used for driving the reciprocating driving mechanism to move with the overturning driving mechanism in sequence and triggering the blocking mechanism: when the reciprocating driving mechanism moves, the first mold 4 is driven to reciprocate along the length direction of the transverse plate 2, and in the process of performing one reciprocation of the first mold 4, the plugging mechanism performs one switching action of conducting and plugging the second mold 5, so that the first mold 4 is matched with the second mold 5 to form an injection molding cavity, and the injection molding cavity is driven to be connected with the injection molding machine 6; when the overturning driving mechanism moves, the second die 5 is driven to overturn in a reciprocating manner, and the blocking mechanism is driven to execute switching action of conducting and blocking states once again on the second die 5, so that the cutlery box in the second die 5 falls onto the conveying device 7 arranged on the base 1.
It should be noted that, the conveying device 7 is an application of the prior art, that is, a conveying belt commonly used in various industries, and the working principle of the conveying device is not described in detail, and in the present invention, the conveying device 7 is set to horizontally convey the demolded cutlery box, so that the cutlery box is processed in the next step, and the production automation is realized.
Referring to fig. 6 and 9 again, the elastic supporting mechanism includes a vertical plate 12 fixedly mounted on the transverse plate 2, and two rotating shafts 13 movably disposed on one side of the vertical plate 12 facing the second mold 5, wherein the second mold 5 is fixed between the two rotating shafts 13, and one of the rotating shafts 13 is connected with the overturning driving mechanism; the two rotating shafts 13 are respectively connected with the vertical plate 12 through a group of elastic telescopic components, each elastic telescopic component comprises a cross rod 16, a ring body 17 and a cylindrical spring 18, the cross rod 16 is arranged on the vertical plate 12 in a sliding mode, the ring body 17 is fixed to the periphery of the cross rod 16, the cylindrical spring 18 is sleeved on the periphery of the cross rod 16, two ends of each cylindrical spring 18 are respectively connected with the ring body 17 and the vertical plate 12, and the rotating shafts 13 are rotatably installed at one end, far away from the vertical plate 12, of the cross rod 16.
The vertical plate 12 is fixedly provided with a discharge pipe 15 connected with a discharge hole of the injection molding machine 6, one side of the second mold 5 facing the vertical plate 12 is provided with a material guide pipe 14 matched with the discharge pipe 15, and the material guide pipe 14 is in butt joint with the discharge pipe 15 at the end of the travel of the first mold 4 facing the second mold 5 so as to form an injection passage for guiding molten materials in the injection molding machine 6 into an injection molding cavity.
When the reciprocating driving mechanism moves, the first mold 4 is driven to move towards the second mold 5 first, and before the injection molding cavity is not formed, the plugging mechanism switches the plugging state of the second mold 5 towards one side of the first mold 4 to a conducting state, so as to ensure that the first mold 4 can smoothly enter the second mold 5 to form the injection molding cavity, after the injection molding cavity is formed, the first mold 4 continues to move, then the second mold 5 is pushed by the first mold 4 to gradually approach the vertical plate 12, correspondingly, the cross rod 16 slides on the vertical plate 12, the cylindrical spring 18 is gradually compressed, the material guide pipe 14 just completes sealing butt joint with the material discharge pipe 15 after the first mold 4 stops moving, then the injection molding machine 6 injects molten material into the injection molding cavity through the material discharge pipe 15 and the material guide pipe 14, after the molten material is molded, the first mold 4 reversely moves to reset, the cylindrical spring 18 rebounds, the second mold 5 resets, and the plugging mechanism switches the conducting state of the second mold 5 to the conducting state gradually, so that the second mold 5 can smoothly fall down to the plugging device 7, and the subsequent processing device can be conveniently carried out.
Referring to fig. 7 and 9 again, the plugging mechanism includes a bidirectional screw rod 9 rotatably mounted on the second mold 5, and two traverse plates 11 symmetrically disposed on the bidirectional screw rod 9 and in threaded connection with the bidirectional screw rod 9, where each traverse plate 11 is fixedly connected with a plugging plate 8 for plugging the second mold 5; the second die 5 is fixedly provided with a guide rod 10, the guide rod 10 penetrates through the two transverse moving plates 11, the two transverse moving plates 11 are in sliding connection with the guide rod 10, the bidirectional screw rod 9 is connected with a rotating shaft of a gear 39 rotatably arranged on one side of the second die 5 through a fourth transmission belt 38, the reciprocating driving mechanism is connected with a toothed plate 40, the gear 39 is matched with the toothed plate 40, and the reciprocating driving mechanism is matched with a toothed ring 41 fixedly arranged on the transverse plate 2.
Specifically, two sections of threads with opposite rotation directions are symmetrically arranged on the bidirectional screw rod 9, two through holes for the bidirectional screw rod 9 to penetrate through with the guide rod 10 are formed in the transverse moving plate 11, and threads engaged with the bidirectional screw rod 9 are formed in the inner wall of the through hole penetrated by the bidirectional screw rod 9.
The first mold 4 moves towards the second mold 5 at first, and in the process of forming the injection molding cavity, the gear 39 is meshed with teeth on the toothed plate 40, so that the gear 39 rotates, the rotating shaft of the gear 39 drives the bidirectional screw rod 9 to rotate forward through the fourth transmission belt 38, the guide rod 10 guides the two traverse plates 11, so that the two traverse plates 11 are in threaded fit with the bidirectional screw rod 9 at the same time to move away from each other, and correspondingly, the two plugging plates 8 are away from each other to conduct the side part of the second mold 5, so that the first mold 4 can enter smoothly to form the injection molding cavity; in contrast, after the cutlery box is molded in the injection molding cavity, in the process that the first mold 4 is pulled away from the second mold 5 and then reset, the teeth on the toothed plate 40 are meshed with the gear 39 again, the rotating shaft of the gear 39 drives the bidirectional screw rod 9 to reversely rotate through the fourth driving belt 38, the two traverse plates 11 move close to each other, the two plugging plates 8 plug the side part of the second mold 5 again, and stable falling and transferring of the subsequent cutlery box are ensured; when the turnover driving mechanism drives the rotating shaft 13 to rotate, the gear 39 moves in an arc manner around the rotating shaft 13 and is meshed with teeth on the toothed ring 41 in the process of turning over the second die 5 by 90 degrees, and the rotating shaft of the gear drives the bidirectional screw rod 9 to rotate forward through the fourth driving belt 38 in the process of turning over the second die 5 downwards, so that the two plugging plates 8 conduct the second die 5, the cutlery box in the second die 5 stably falls down, and then, in the process of turning over the second die 5 upwards by 90 degrees, the gear 39 is meshed with the teeth on the toothed ring 41 again and drives the bidirectional screw rod 9 to rotate reversely, so that the two plugging plates 8 are restored to the plugging state of the second die 5.
It should be emphasized that the elastic potential energy of the cylindrical spring 18 is larger, so as to prevent the problem that the second mold 5 cannot rotate due to the yielding of the second mold 5 along with the movement of the toothed plate 40 after the teeth on the toothed plate 40 start to mesh with the gear 39, and the two plugging plates 8 cannot conduct the second mold 5.
Referring again to fig. 5, the maltese cross movement mechanism comprises a driving wheel 20 rotatably mounted on the riser 3, a first driven wheel 21, a second driven wheel 22 and a driving motor 19 mounted on the riser 3. The output end of the driving motor 19 is connected with the rotating shaft of the driving wheel 20, the rotating shaft of the first driven wheel 21 is connected with the reciprocating driving mechanism, and the rotating shaft of the second driven wheel 22 is connected with the overturning driving mechanism.
Referring to fig. 4 and 11 again, the reciprocating driving mechanism includes two long rods 35 fixedly installed on the riser 3, a moving plate 31 slidably installed on the two long rods 35, and a cam 33 rotatably installed on the riser 3, wherein a rotation shaft of the cam 33 is connected with a rotation shaft of the first driven wheel 21 through a second bevel gear set 36 and a first transmission belt 28, and the toothed plate 40 is fixedly connected with the moving plate 31; the moving plate 31 is fixed to one side of the first mold 4, which is away from the second mold 5, and two bar-shaped protrusions 32 are fixed to the moving plate 31, a gap is reserved between the two bar-shaped protrusions 32, a cylinder 34 is fixed to the cam 33, and the cylinder 34 extends into the gap and is slidably connected with the two bar-shaped protrusions 32.
In detail, the riser 3 is rotatably provided with a second transmission shaft 37, the first transmission belt 28 is used for connecting the second transmission shaft 37 with the rotation shaft of the first driven wheel 21, and the second bevel gear set 36 includes a third bevel gear fixedly installed at one end of the second transmission shaft 37 facing the rotation shaft of the cam 33 and a fourth bevel gear fixedly installed coaxially with the cam 33 and engaged with the third bevel gear.
When the driving device works, the driving motor 19 drives the driving wheel 20 to do two reciprocating rotations, in the first reciprocating rotation process of the driving wheel 20, the first driven wheel 21 is driven to do reciprocating rotation, when the first driven wheel 21 rotates reciprocally, the rotation shaft of the driving motor drives the second transmission shaft 37 to rotate together with the first transmission belt 28, so that the second transmission shaft 37 drives the cam 33 to rotate through the second bevel gear set 36, correspondingly, the column 34 does circular motion (the track is a semicircle), and the column 34 is in sliding fit with the two strip-shaped bulges 32, so that the movable plate 31 slides reciprocally on the two long rods 35 once; it should be noted that, since a certain time is required for injecting the molten material into the injection molding cavity and for cooling and molding the cutlery box in the injection molding cavity, after the driving wheel 20 drives the first driven wheel 21 to rotate 90 ° (the cam 33 has completed 180 ° -rotation, the injection molding cavity has been formed, the material guiding tube 14 and the material discharging tube 15 have completed docking), the driving motor 19 will stop working for a certain period of time, so as to provide time for injecting the molten material and cooling and molding the cutlery box, and then, after the driving wheel 20 drives the first driven wheel 21 to rotate reversely by 90 ° -rotation, the first mold 4 is pulled out from the second mold 5 for resetting.
Referring to fig. 5 and 10 again, the turnover driving mechanism includes a first transmission shaft 24 rotatably mounted on the riser 3 and a movable arm connecting the first transmission shaft 24 with the rotating shaft 13, where the first transmission shaft 24 is connected with the rotating shaft of the second driven wheel 22 through a first bevel gear set 23; the movable arm comprises a first connecting arm 26 and a second connecting arm 27, the head ends of the first connecting arm 26 and the second connecting arm 27 are respectively connected with the first transmission shaft 24 and the rotating shaft 13 in a rotating mode, the tail ends of the first connecting arm 26 and the second connecting arm 27 are connected with each other in a rotating mode through a shaft piece 25, the shaft piece 25 is connected with the first transmission shaft 24 through a second transmission belt 29, and the movable arm is connected with the rotating shaft 13 through a third transmission belt 30.
The first bevel gear set 23 includes a first bevel gear fixedly installed coaxially with the second driven wheel 22 and a second bevel gear fixed to an end of the first transmission shaft 24 remote from the first connection arm 26, and the second bevel gear is meshed with the first bevel gear.
When the driving wheel 20 performs the second reciprocating rotation, the second driven wheel 22 is driven to rotate forward by 90 degrees, correspondingly, the rotating shaft of the driving wheel 20 drives the first transmission shaft 24 to rotate through the first bevel gear set 23, the first transmission shaft 24 drives the shaft element 25 to rotate through the second transmission belt 29, the shaft element 25 drives the rotating shaft 13 to rotate by 90 degrees through the third transmission belt 30, so that the second die 5 can turn down by 90 degrees, the cutlery box in the second die 5 can be ensured to fall in a stable posture, and then, when the second driven wheel 22 rotates reversely by 90 degrees, the rotating shaft of the second driven wheel 22 drives the second die 5 to turn up by 90 degrees to reset.
In the process that the material guiding pipe 14 approaches the material discharging pipe 15 to form an injection passage for guiding the molten material in the injection molding machine 6 into the injection molding cavity, the position of the rotating shaft 13 moves along with the second mold 5, so that the first connecting arm 26 and the second connecting arm 27 rotate through the shaft member 25, thereby ensuring the maintenance of the transmission state between the rotating shaft of the second driven wheel 22 and the rotating shaft 13.
Referring to fig. 1 and 8 again, the transverse plate 2 is provided with a through hole to form a path for the cutlery box to fall onto the conveying device 7, the bottom of the transverse plate 2 is fixed with a frame plate 42, the frame plate 42 is hollow, the inner wall of the frame plate 42 is obliquely provided with a plurality of air nozzles for collecting air flow, and the outer wall of the frame plate is provided with a connector connected with an external fan.
During operation, the peripheral fan works to blow air into the frame plate 42, so that air is collected through the air nozzles, and then, after the cutlery box falls from the second die 5, the collected air flow has upward blowing force (smaller than the actual gravity of the cutlery box) on the cutlery box, so that the effect of slowly falling the cutlery box can be realized, on one hand, the cutlery box is further cooled, on the other hand, the cutlery box is prevented from falling onto the conveying device 7, the shape of the cutlery box is changed due to incomplete cooling, and the reject ratio of production is increased.
The invention also provides a daily cutlery box which is injection molded by adopting the reverse air cooling molding injection molding process.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (6)
1. The reverse air-cooled molding injection molding process is characterized by comprising the following steps of:
screening plastic particle raw materials by using a rotary screen to remove dust and sundries doped in the raw materials;
inputting the raw materials subjected to screening treatment into an injection molding device, and carrying out hot melting on the raw materials by a heating module on the injection molding device, so that plastic particles are converted into fluid in a molten state, and keeping the heating temperature within the range of 180-220 ℃;
step three, the control device drives the molding module to form an injection molding cavity, the injection molding device injects raw materials in a molten state into the injection molding cavity, the molten viscosity of the raw materials is kept within the range of 1500-2500 mPa.s, the injection molding pressure is kept within the range of 0.4-0.7MPa, and the holding pressure is 60-90 MPa;
step four, cooling, wherein the cooling temperature is 10-13 ℃, the cooling time is 3-5min, and the control device drives the forming module to reset to finish demoulding;
fifthly, reversely blowing the demoulded product by a blowing device to finish secondary cooling, and transferring the product after the secondary cooling to a next processing production line;
the injection molding device comprises an injection molding machine (6) arranged on a base (1), wherein a transverse plate (2) is fixedly arranged on the base (1), and a vertical plate (3) is fixedly arranged on the transverse plate (2);
the control device comprises a Malta cross movement mechanism arranged on the vertical plate (3), a reciprocating driving mechanism connected with the Malta cross movement mechanism and a turnover driving mechanism;
the molding module comprises a first die (4) movably arranged on one side, facing the injection molding machine (6), of the vertical plate (3) and connected with the reciprocating driving mechanism, and a second die (5) movably arranged on the transverse plate (2), wherein the second die (5) is connected with an elastic supporting mechanism arranged on the base (1), and the reciprocating driving mechanism is used for driving the first die (4) to move along the length direction of the transverse plate (2) so as to enable the first die (4) to be matched with the second die (5) movably arranged on the transverse plate (2);
the second die (5) is provided with a blocking mechanism for switching on and blocking states of the second die (5) towards one side of the first die (4), and the maltese cross movement mechanism is used for driving the reciprocating driving mechanism to move with the overturning driving mechanism in sequence and triggering the blocking mechanism:
when the reciprocating driving mechanism moves, the first die (4) is driven to reciprocate along the length direction of the transverse plate (2), and the plugging mechanism performs switching actions of conducting and plugging the second die (5) once in the process of performing one reciprocating movement of the first die (4), so that the first die (4) is matched with the second die (5) to form an injection molding cavity, and the injection molding cavity is driven to be connected with the injection molding machine (6);
when the overturning driving mechanism moves, the second die (5) is driven to overturn in a reciprocating manner, and the plugging mechanism is driven to execute switching actions of conducting and plugging states once again on the second die (5), so that the cutlery box in the second die (5) falls onto a conveying device (7) arranged on the base (1);
the elastic supporting mechanism comprises a vertical plate (12) fixedly arranged on the transverse plate (2) and two rotating shafts (13) movably arranged on one side of the vertical plate (12) towards the second die (5), the second die (5) is fixed between the two rotating shafts (13), and one rotating shaft (13) is connected with the overturning driving mechanism;
the two rotating shafts (13) are respectively connected with the vertical plate (12) through a group of elastic telescopic assemblies, each elastic telescopic assembly comprises a cross rod (16) arranged on the vertical plate (12) in a sliding mode, a ring body (17) fixed on the periphery of the cross rod (16) and a cylindrical spring (18) sleeved on the periphery of the cross rod (16), two ends of each cylindrical spring (18) are respectively connected with the ring body (17) and the vertical plate (12), and the rotating shafts (13) are rotatably arranged at one end, far away from the vertical plate (12), of the cross rod (16);
the plugging mechanism comprises a bidirectional screw rod (9) rotatably mounted on the second die (5) and two transverse moving plates (11) symmetrically arranged on the bidirectional screw rod (9) and in threaded connection with the bidirectional screw rod (9), wherein each transverse moving plate (11) is fixedly connected with one plugging plate (8) for plugging the second die (5);
the second die (5) is fixedly provided with a guide rod (10), the guide rod (10) penetrates through the two transverse moving plates (11), the two transverse moving plates (11) are in sliding connection with the guide rod (10), the bidirectional screw rod (9) is connected with a rotating shaft of a gear (39) rotatably arranged at one side of the second die (5) through a fourth transmission belt (38), the reciprocating driving mechanism is connected with a toothed plate (40), and the gear (39) is matched with the toothed plate (40) and is also matched with a toothed ring (41) fixedly arranged on the transverse plate (2);
the dinner box comprises a conveying device (7), a transverse plate (2) and is characterized in that a through hole is formed in the transverse plate (2) so as to form a passage for the dinner box to fall down on the conveying device (7), a frame plate (42) is fixed at the bottom of the transverse plate (2), the inside of the frame plate (42) is hollow, a plurality of air nozzles for collecting air flow are obliquely arranged on the inner wall of the frame plate, connectors connected with an external fan are arranged on the outer wall of the frame plate, and when the dinner box falls down from a second die (5), the collected air flow has upward blowing force on the dinner box, and the blowing force is smaller than the gravity of the dinner box.
2. The reverse air-cooled molding injection molding process according to claim 1, wherein a discharge pipe (15) connected with a discharge hole of the injection molding machine (6) is fixedly installed on the vertical plate (12), a guide pipe (14) matched with the discharge pipe (15) is arranged on one side of the second mold (5) facing the vertical plate (12), and the guide pipe (14) is butted with the discharge pipe (15) at the end of the travel of the first mold (4) facing the second mold (5) so as to form an injection passage for guiding molten materials in the injection molding machine (6) into the injection molding cavity.
3. The reverse air-cooled shaping injection molding process according to claim 1, wherein the maltese cross movement mechanism comprises a driving wheel (20) rotatably mounted on the riser (3), a first driven wheel (21), a second driven wheel (22) and a driving motor (19) mounted on the riser (3);
the output end of the driving motor (19) is connected with the rotating shaft of the driving wheel (20), the rotating shaft of the first driven wheel (21) is connected with the reciprocating driving mechanism, and the rotating shaft of the second driven wheel (22) is connected with the overturning driving mechanism.
4. A reverse air-cooled molding injection molding process according to claim 3, wherein the reciprocating drive mechanism comprises two long rods (35) fixedly mounted on the vertical plate (3), a moving plate (31) slidably mounted on the two long rods (35) and a cam (33) rotatably mounted on the vertical plate (3), a rotating shaft of the cam (33) is connected with a rotating shaft of the first driven wheel (21) through a second bevel gear set (36) and a first transmission belt (28), and the toothed plate (40) is fixedly connected with the moving plate (31);
the movable plate (31) is fixed with one side of the first die (4) deviating from the second die (5), two strip-shaped protrusions (32) are fixed on the movable plate (31), gaps are reserved between the two strip-shaped protrusions (32), a cylinder (34) is fixed on the cam (33), and the cylinder (34) stretches into the gaps and is in sliding connection with the two strip-shaped protrusions (32).
5. The reverse air-cooled molding injection molding process according to claim 4, wherein the turnover driving mechanism comprises a first transmission shaft (24) rotatably mounted on the riser (3) and a movable arm connecting the first transmission shaft (24) with the rotating shaft (13), and the first transmission shaft (24) is connected with the rotating shaft of the second driven wheel (22) through a first bevel gear set (23);
the movable arm comprises a first connecting arm (26) and a second connecting arm (27), the head ends of the first connecting arm (26) and the second connecting arm (27) are respectively connected with the first transmission shaft (24) and the rotating shaft (13) in a rotating mode, the tail ends of the first connecting arm (26) and the tail ends of the second connecting arm (27) are connected with each other in a rotating mode through a shaft piece (25), the shaft piece (25) is connected with the first transmission shaft (24) through a second transmission belt (29), and the movable arm is connected with the rotating shaft (13) through a third transmission belt (30).
6. The daily meal box is characterized in that the daily meal box is injection molded by adopting the reverse air-cooled molding injection molding process as claimed in claim 1.
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| CN202310043254.0A CN115782094B (en) | 2023-01-29 | 2023-01-29 | Reverse air-cooled molding injection molding process and daily meal box molded by adopting same |
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| CN116811146B (en) * | 2023-08-29 | 2023-11-10 | 烟台爱开天隆模塑有限公司 | Plastic product processing and forming device |
| CN117681396A (en) * | 2024-01-24 | 2024-03-12 | 王鹏 | Injection molding process |
| CN117817945B (en) * | 2024-03-04 | 2024-05-03 | 天津福赛汽车部件有限公司 | Based on car storing box makes with bubble injection moulding equipment that prevents |
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