CN115782094A - Reverse air-cooling molding injection molding process and daily lunch box molded by adopting injection molding process - Google Patents
Reverse air-cooling molding injection molding process and daily lunch box molded by adopting injection molding process Download PDFInfo
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- CN115782094A CN115782094A CN202310043254.0A CN202310043254A CN115782094A CN 115782094 A CN115782094 A CN 115782094A CN 202310043254 A CN202310043254 A CN 202310043254A CN 115782094 A CN115782094 A CN 115782094A
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
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Abstract
The invention relates to a reverse air-cooling shaping injection molding process and a daily meal box molded by adopting the injection molding process, wherein the reverse air-cooling shaping injection molding process comprises the following steps: step one, screening plastic particles by using a drum screen; inputting the processed raw materials into an injection molding device, and carrying out hot melting on the raw materials by a heating module on the injection molding device so as to convert plastic particles into fluid in a molten state; driving the molding module to form an injection molding cavity by the control device, and injecting the raw material in a molten state into the injection molding cavity by the injection molding device; cooling, and driving the forming module to reset by the control device to finish demoulding; and fifthly, the blowing device blows air reversely to the demolded product to finish secondary cooling, finally, the lunch box can stably drop onto the conveying device, subsequent processing procedures can be conveniently carried out, workers do not need to put the demolded product again, and 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 lunch box formed by adopting the injection molding process.
Background
In daily life, tableware (meal box) is diversified, wherein, some tableware is manufactured by injection molding, and plastic injection molding is generally used. An injection molding machine is a main molding device for making thermoplastic plastics or thermosetting materials into plastic products with various shapes by using a plastic molding die, and the injection molding is realized by an injection molding machine and the die.
However, current injection moulding process, when being applied to actual production, often can send out the product and still not cool off the shaping completely after the drawing of patterns, and then lead to the product to take place to warp, increase the product defective rate, to this, can add the cooling measure after the drawing of patterns, further blast cooling to the product after the drawing of patterns, but most products drop at will when the drawing of patterns, the stationarity when leading to the product whereabouts is difficult to obtain the assurance, thereby the product just can't directly get into next process flow, still need put again through staff's arrangement, increase working strength on foot, reach the production effect in the ideal.
Disclosure of Invention
The invention aims to provide a reverse air-cooling molding injection process and a daily meal box molded by adopting the injection process, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the reverse air-cooling molding injection molding process comprises the following steps:
screening a plastic particle raw material by using a drum screen, and screening out dust, impurities and the like doped in the raw material;
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 to convert plastic particles into molten fluid and keep the heating temperature within the range of 180-220 ℃;
driving the molding module to form an injection molding cavity by the control device, injecting the raw material in a molten state into the injection molding cavity by the injection molding device, keeping the melt viscosity of the raw material within the range of 1500-2500mPa & s, keeping the injection molding pressure within the range of 0.4-0.7MPa, and keeping the pressure at 60-90 MPa;
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 complete demoulding;
and fifthly, the air blowing device carries out reverse air blowing on the demolded product to finish secondary cooling, and the product after secondary cooling is transferred to the next processing production line.
As a further scheme of the invention: the injection molding device comprises an injection molding machine arranged on a base, a transverse plate is fixedly arranged on the base, and a vertical plate is fixed on the transverse plate; the control device comprises a maltese cross movement mechanism arranged on the vertical plate, and a reciprocating driving mechanism and a turnover driving mechanism which are connected with the maltese cross movement mechanism; the forming module comprises a first die and a second die, the first die is movably arranged on one side, facing the injection molding machine, of the vertical plate and is connected with the reciprocating driving mechanism, the second die is movably arranged on the transverse plate, 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 mould is provided with a plugging mechanism for switching the conduction and plugging states of the second mould towards one side of the first mould, the maltese cross machine core mechanism is used for driving the reciprocating driving mechanism and the overturning driving mechanism to move successively, and the plugging mechanism is triggered: when the reciprocating driving mechanism moves, the first mold is driven to reciprocate along the length direction of the transverse plate, and in the process of one reciprocating movement of the first mold, the plugging mechanism executes one switching action of conducting and plugging states of the second mold, so that the first mold is matched with the second mold to form an injection molding cavity, and the injection molding cavity is connected with the injection molding machine; when the turnover driving mechanism moves, the second die is driven to turn over in a reciprocating manner, and the blocking mechanism is driven to perform switching actions of conduction and blocking states on the second die again, so that the lunch boxes in the second die fall onto the conveying device arranged on the base.
As a still further scheme 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 facing the second mold, the second mold is fixed between the two rotating shafts, and one of the rotating shafts is connected with the overturning driving mechanism; the two rotating shafts are respectively connected with the vertical plate through a group of elastic telescopic assemblies, each elastic telescopic assembly comprises a transverse rod, a ring body and a cylindrical spring, the transverse rod is slidably arranged on the vertical plate, the ring body is fixed on the periphery of the transverse rod, the cylindrical spring is sleeved on the periphery of the transverse rod, two ends of the cylindrical spring are respectively connected with the ring body and the vertical plate, and the rotating shafts are rotatably arranged at one ends, far away from the vertical plate, of the transverse rod.
As a still further scheme of the invention: the vertical plate is also fixedly provided with a discharge pipe connected with a discharge port of the injection molding machine, one side of the second mold facing the vertical plate is provided with a material guide pipe matched with the discharge pipe, and the material guide pipe is butted with the discharge pipe at the tail end of the stroke of the first mold moving towards the second mold so as to form an injection molding passage for guiding the molten material in the injection molding machine into the injection molding cavity.
As a still further scheme of the invention: the plugging mechanism comprises a bidirectional screw rod rotatably mounted on the second mold and two transverse moving plates symmetrically arranged on the bidirectional screw rod and in threaded connection with the bidirectional screw rod, and the two transverse moving plates are fixedly connected with a plugging plate for plugging the second mold respectively; still fixed mounting has a guide bar on the second mould, the guide bar runs through two the sideslip board, and two the sideslip board with guide bar sliding connection, two-way lead screw still connect through the fourth drive belt rotate install in the axis of rotation of the gear of second mould one side, reciprocating drive mechanism is connected with the pinion rack, the gear with the pinion rack cooperation, still with fixed mounting be in the ring gear cooperation on the diaphragm.
As a still further scheme 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; 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 a still further scheme of the invention: the reciprocating driving mechanism comprises two long rods fixedly mounted on the vertical plate, a moving plate slidably arranged on the two long rods and a cam rotatably mounted on the vertical plate, a rotating shaft of the cam is connected with a rotating shaft of the first driven wheel through a second bevel gear set and a first transmission belt, and the toothed plate is fixedly connected with the moving plate; the movable plate with first mould deviates from one side of second mould is fixed, just be fixed with two bar archs on the movable plate, two reserve the clearance between the bar arch, be fixed with the cylinder on the cam, the cylinder stretches into in the clearance and with two bar protruding sliding connection.
As a still further scheme of the invention: the turnover driving mechanism comprises a first transmission shaft rotatably mounted on the vertical plate and a movable arm connected with the first transmission shaft and the rotating shaft, and the first transmission shaft is connected with the rotating shaft of the second driven wheel through a first bevel gear set; the digging arm includes the head end respectively with first transmission shaft and pivot rotate first linking arm, the second linking arm of connecting, first linking arm with the tail end of second linking arm the two is passed through the shaft piece and is rotated the connection, the shaft piece passes through the second drive belt and connects first transmission shaft still through the third drive belt with the pivot is connected.
As a still further scheme of the invention: the meal box conveying device is characterized in that an opening is formed in the transverse plate to form a passage for the meal box to fall on the conveying device, a frame plate is fixed to the bottom of the transverse plate, the frame plate is hollow inside, a plurality of air nozzles used for collecting air flow are obliquely arranged on the inner wall of the frame plate, and a connector connected with an external fan is arranged on the outer wall of the frame plate.
The daily cutlery box adopts the reverse air-cooled moulding injection moulding process for injection moulding.
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 by the maltese cross machine core mechanism, and the plugging mechanism performs switching actions of conduction and plugging on one side of the second mould in the process of the movement of the reciprocating driving mechanism and the overturning driving mechanism, so that the lunch box can be ensured to fall in a stable posture, and further, the lunch box can stably fall onto the transmission device, the subsequent processing procedure can be conveniently carried out, workers do not need to put the demoulded product 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 injection molding process;
FIG. 2 is a schematic structural view of an embodiment of a reverse air-cooled injection molding process;
FIG. 3 is a schematic view of another embodiment of a reverse air-cooled injection molding process;
FIG. 4 is a schematic view of an embodiment of a reverse air-cooled 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 structural diagram of an embodiment of a plugging mechanism and an elastic support mechanism in an inverse air-cooling molding injection molding process;
fig. 10 is a schematic view of a connection state of a maltese cross movement mechanism and a turnover driving mechanism in an embodiment of a reverse air-cooling molding injection molding process;
FIG. 11 is a schematic diagram of an embodiment of a reciprocating mechanism of an inverse air-cooled injection molding process.
In the figure: 1. a base; 2. a transverse plate; 3. a vertical plate; 4. a first mold; 5. a second mold; 6. an injection molding machine; 7. a transmission device; 8. a plugging plate; 9. a bidirectional screw rod; 10. a guide bar; 11. transversely moving the plate; 12. a vertical plate; 13. a rotating shaft; 14. a material guide pipe; 15. a discharge pipe; 16. a cross bar; 17. a ring body; 18. a cylindrical spring; 19. a drive 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 drive belt; 29. a second belt; 30. a third belt; 31. moving the plate; 32. a strip-shaped bulge; 33. a cam; 34. a cylinder; 35. a long rod; 36. a second bevel gear set; 37. a second transmission shaft; 38. a fourth belt; 39. a gear; 40. a toothed plate; 41. a toothed ring; 42. a frame plate.
Detailed description of the preferred embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, an element of the present invention may be said to be "fixed" or "disposed" to another element, either directly on the other element or with intervening elements 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 as used herein are for illustrative purposes only and do not denote a single embodiment.
In the embodiment of the invention, the reverse air-cooling molding injection molding process comprises the following steps:
step one, screening a plastic particle raw material by using a drum screen, and screening out dust, impurities and the like doped in the raw material;
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 to convert plastic particles into molten fluid and keep the heating temperature within the range of 180-220 ℃;
driving the molding module to form an injection molding cavity by the control device, injecting the raw material in a molten state into the injection molding cavity by the injection molding device, keeping the melt viscosity of the raw material within the range of 1500-2500mPa & s, keeping the injection molding pressure within the range of 0.4-0.7MPa, and keeping the pressure at 60-90 MPa;
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, the air blowing device carries out reverse air blowing on the demolded product to finish secondary cooling, and the product after secondary cooling is transferred to the next processing production line.
Referring to fig. 1-11, the injection molding device includes an injection molding machine 6 mounted on a base 1, and a horizontal plate 2 is fixedly mounted on the base 1, and a vertical plate 3 is fixed on the horizontal plate 2; the control device comprises a maltese cross movement mechanism arranged on the vertical plate 3, and a reciprocating driving mechanism and a turning driving mechanism which are connected with the maltese cross movement mechanism; the forming module comprises a first die 4 and a second die 5, wherein the first die 4 is movably arranged on one side, facing the injection molding machine 6, of the vertical plate 3 and is connected with the reciprocating driving mechanism, the second die 5 is movably arranged on the transverse plate 2, 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 mould 5 is provided with a plugging mechanism for switching the conduction and plugging states of the second mould 5 towards the first mould 4, the maltese cross movement mechanism is used for driving the reciprocating driving mechanism and the overturning driving mechanism to move sequentially and triggering the plugging 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 one reciprocating movement of the first mold 4, the plugging mechanism executes one switching action of conducting and plugging states of 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 connected with the injection molding machine 6; when the turning driving mechanism moves, the second mold 5 is driven to turn back and forth, and the blocking mechanism is driven to perform a switching action of conducting and blocking states on the second mold 5 again, so that the lunch boxes in the second mold 5 fall onto the transmission device 7 installed on the base 1.
It should be added that the transmission device 7 is an application of the prior art, that is, a transmission belt often used in various industries and production, and the working principle of the transmission belt is not described in detail in this application, in the present invention, the transmission device 7 is arranged to horizontally convey the demolded lunch boxes so as to facilitate the further processing of the lunch boxes, and thus, the production automation is realized.
Referring to fig. 6 and 9 again, the elastic supporting mechanism includes a vertical plate 12 fixedly installed on the horizontal plate 2 and two rotating shafts 13 movably installed on one side of the vertical plate 12 facing the second mold 5, the second mold 5 is fixed between the two rotating shafts 13, and one of the rotating shafts 13 is connected to the turnover 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, a ring body 17 and a cylindrical spring 18, the cross rod 16 is slidably arranged on the vertical plate 12, the ring body 17 is fixed on the periphery of the cross rod 16, the cylindrical spring 18 is sleeved on the periphery of the cross rod 16, two ends of the 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 ends, far away from the vertical plate 12, of the cross rods 16.
A discharge pipe 15 connected with a discharge port of the injection molding machine 6 is further fixedly mounted on the vertical plate 12, a material 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 material guide pipe 14 is butted with the discharge pipe 15 at the tail end of a stroke of the first mold 4 moving towards the second mold 5, so as to form an injection molding passage for guiding the molten material in the injection molding machine 6 into the injection molding cavity.
When the reciprocating driving mechanism moves, the reciprocating driving mechanism drives the first mold 4 to move towards the second mold 5, and before an injection molding cavity is not formed, the blocking mechanism switches the blocking 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, so that 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, after the first mold 4 stops moving, the guide pipe 14 just completes sealed butt joint with the discharge pipe 15, then the injection molding machine 6 injects the molten material into the injection molding cavity through the discharge pipe 15 and the guide pipe 14, after the molten material is molded, the first mold 4 reversely moves to reset, in the process, the cylindrical spring 18 rebounds, the second mold 5 resets, and the blocking mechanism switches the conducting state of the second mold 5 to a second blocking state, so that the molten material can be stably transferred to the lunch box 7 after being turned over, and the lunch box can be conveniently processed.
Referring to fig. 7 and 9 again, the plugging mechanism includes a bidirectional screw 9 rotatably mounted on the second mold 5, and two traverse plates 11 symmetrically disposed on the bidirectional screw 9 and in threaded connection with the bidirectional screw 9, each of the two traverse plates 11 being fixedly connected with a plugging plate 8 for plugging the second mold 5; still fixed mounting has a guide bar 10 on the second mould 5, guide bar 10 runs through two sideslip board 11, and two sideslip board 11 with guide bar 10 sliding connection, two-way lead screw 9 still connect through fourth drive belt 38 rotate install in the axis of rotation of the gear 39 of second mould 5 one side, reciprocal actuating mechanism is connected with pinion rack 40, gear 39 with pinion rack 40 cooperates, still with fixed mounting be in the cooperation of ring gear 41 on diaphragm 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 and the guide rod 10 to pass through are respectively arranged on the traverse plate 11, and the inner wall of the through hole through which the bidirectional screw rod 9 passes is provided with threads engaged with the bidirectional screw rod 9.
The first mold 4 firstly moves towards the second mold 5, and in the forming process of the injection molding cavity, the gear 39 is meshed with teeth on the toothed plate 40, so that the gear 39 rotates, further, the rotating shaft of the gear 39 drives the bidirectional screw rod 9 to rotate in the forward direction through the fourth transmission belt 38, the guide rod 10 guides the two traverse plates 11, the two traverse plates 11 are simultaneously in threaded fit with the bidirectional screw rod 9 and move away from each other, correspondingly, the two blocking plates 8 are away from each other, and the side part of the second mold 5 is conducted, so that the first mold 4 can smoothly enter to form the injection molding cavity; conversely, after the meal box is molded in the injection molding cavity, in the process that the first mold 4 is withdrawn from the second mold 5 and then is 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 rotate reversely through the fourth transmission belt 38, the two transverse moving plates 11 move close to each other, and the two blocking plates 8 block the side part of the second mold 5 again to ensure the stable falling and transferring of the subsequent meal box; when the turning driving mechanism drives the rotating shaft 13 to rotate, so that the second mold 5 turns 90 degrees, the gear 39 makes circular arc motion around the rotating shaft 13 and is engaged with the teeth on the toothed ring 41, during the downward turning process of the second mold 5, the rotating shaft of the gear drives the bidirectional screw rod 9 to rotate forward through the fourth transmission belt 38, so that the two blocking plates 8 conduct the second mold 5, so that the lunch box in the second mold 5 falls down stably, and subsequently, during the upward turning 90 degrees resetting process of the second mold 5, the gear 39 is engaged with the teeth on the toothed ring 41 again and drives the bidirectional screw rod 9 to rotate reversely, so that the two blocking plates 8 are restored to the blocking state for the second mold 5.
It should be emphasized that the elastic potential energy of the cylindrical spring 18 is relatively large, so as to prevent the problem that the second mold 5 yields 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 then the gear 39 cannot rotate, and the two plugging plates 8 cannot conduct the second mold 5.
Referring to fig. 5 again, the maltese cross movement mechanism includes a driving wheel 20 rotatably mounted on the vertical plate 3, a first driven wheel 21, a second driven wheel 22, and a driving motor 19 mounted on the vertical plate 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 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 to 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 to the moving plate 31; the movable plate 31 and the first die 4 are fixed on one side departing from the second die 5, two strip-shaped protrusions 32 are fixed on the movable plate 31, a gap is reserved between the two strip-shaped protrusions 32, a cylinder 34 is fixed on the cam 33, and the cylinder 34 extends into the gap and is in sliding connection with the two strip-shaped protrusions 32.
In detail, the riser 3 is rotatably mounted with a second transmission shaft 37, the first transmission belt 28 is used for connecting the second transmission shaft 37 with the rotating shaft of the first driven wheel 21, and the second bevel gear set 36 includes a third bevel gear fixedly mounted on an end of the second transmission shaft 37 facing the rotating shaft of the cam 33 and a fourth bevel gear fixedly mounted coaxially with the cam 33 and engaged with the third bevel gear.
When the two-stage reciprocating sliding type double-shaft reciprocating sliding mechanism works, the driving motor 19 drives the driving wheel 20 to perform reciprocating rotation twice, the driving wheel 20 drives the first driven wheel 21 to perform reciprocating rotation in the first reciprocating rotation process, when the first driven wheel 21 performs reciprocating rotation, the rotating shaft of the first driven wheel and the first transmission belt 28 drive the second transmission shaft 37 to rotate, then the second transmission shaft 37 drives the cam 33 to rotate through the second bevel gear set 36, correspondingly, the cylinder 34 performs circular motion (the track is semicircular) and is in sliding fit with the two strip-shaped protrusions 32, so that the moving plate 31 performs reciprocating sliding once on the two long rods 35; it should be noted that, since it takes a certain time to inject the molten material into the injection mold cavity and cool and mold the meal box in the injection mold cavity, after the driving wheel 20 drives the first driven wheel 21 to rotate 90 ° (the cam 33 has completed 180 ° rotation, the injection mold cavity has been formed, and the material guiding pipe 14 and the material discharging pipe 15 have completed butt joint), the driving motor 19 will stop working for a period of time to provide time for injecting the molten material and cooling and molding the meal box, and then, after the driving wheel 20 drives the first driven wheel 21 to rotate 90 ° reversely, the first mold 4 will be pulled away from the second mold 5 and reset.
Referring to fig. 5 and 10 again, the tilting driving mechanism includes a first transmission shaft 24 rotatably mounted on the vertical plate 3 and a movable arm connecting the first transmission shaft 24 and the rotating shaft 13, the first transmission shaft 24 is connected to the rotating shaft of the second driven wheel 22 through a first bevel gear set 23; the digging arm includes the head end respectively with first transmission shaft 24 and pivot 13 rotate first linking arm 26, second linking arm 27 of being connected, first linking arm 26 with the tail end of the two of second linking arm 27 is passed through shaft member 25 and is rotated and be connected, shaft member 25 passes through second transmission belt 29 and connects first transmission shaft 24, still through third transmission belt 30 with pivot 13 is connected.
The first bevel gear set 23 includes a first bevel gear fixedly mounted 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 connecting arm 26, and the second bevel gear meshes with the first bevel gear.
When the driving wheel 20 performs the second reciprocating rotation, it will firstly drive the second driven wheel 22 to rotate forward by 90 °, accordingly, its rotation shaft will drive the first transmission shaft 24 to rotate through the first bevel gear set 23, the first transmission shaft 24 then drives the shaft 25 to rotate through the second transmission belt 29, the shaft 25 drives the rotation shaft 13 to rotate by 90 ° through the third transmission belt 30, so that the second mold 5 is turned over downward by 90 °, thereby ensuring that the lunch box in the second mold 5 can fall down in a stable posture, and subsequently, when the second driven wheel 22 rotates backward by 90 °, its rotation shaft will drive the second mold 5 to turn over upward by 90 ° to reset.
During the approach of the material guiding pipe 14 to the material discharging pipe 15 to form the injection passage for guiding the molten material in the injection molding machine 6 into the injection mold cavity, since the position of the rotating shaft 13 follows the movement of the second mold 5, the first connecting arm 26 and the second connecting arm 27 are rotated by the shaft 25, so as to ensure 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 cross plate 2 is provided with a through hole to form a passage for the lunch box to fall onto the transmission device 7, a frame plate 42 is fixed at the bottom of the cross plate 2, 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.
When the meal box is in operation, the external fan works to blow air into the frame plate 42, so that the air is collected through the plurality of air nozzles, and further, after the meal box falls from the second mold 5, the collected air flow has an upward blowing force (smaller than the actual gravity of the meal box) on the meal box, the effect of slowly falling the meal box can be realized, on one hand, the meal box is further cooled, on the other hand, the meal box is prevented from falling onto the transmission device 7, the shape of the meal box is prevented from being changed due to incomplete cooling, and the reject ratio of production is increased.
The invention also provides a daily lunch box which is formed by injection molding by adopting the reverse air-cooling moulding 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 attributes 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 specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.
Claims (10)
1. The reverse air-cooling molding injection molding process is characterized by comprising the following steps of:
step one, screening a plastic particle raw material by using a drum screen, and screening out dust and impurities doped in the raw material;
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 to convert plastic particles into molten fluid and keep the heating temperature within the range of 180-220 ℃;
driving the molding module to form an injection molding cavity by the control device, injecting the raw material in a molten state into the injection molding cavity by the injection molding device, keeping the melt viscosity of the raw material within the range of 1500-2500mPa & s, keeping the injection molding pressure within the range of 0.4-0.7MPa, and keeping the pressure at 60-90 MPa;
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, the air blowing device carries out reverse air blowing on the demolded product to finish secondary cooling, and the product after secondary cooling is transferred to the next processing production line.
2. The reverse air-cooling plastic injection molding process according to claim 1, wherein the injection molding device comprises an injection molding machine (6) mounted on a base (1), a transverse plate (2) is fixedly mounted on the base (1), and a vertical plate (3) is fixed 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 turning driving mechanism which are connected with the maltese cross movement mechanism; the forming module comprises a first die (4) which is 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) which is movably arranged on the transverse plate (2), 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) which is movably arranged on the transverse plate (2); the second mould (5) is provided with a plugging mechanism for switching the conduction and plugging states of the second mould (5) towards the first mould (4), the Maltese cross machine core mechanism is used for driving the reciprocating driving mechanism and the overturning driving mechanism to move sequentially and the plugging mechanism is triggered: 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 one reciprocating movement of the first mold (4), the plugging mechanism executes one switching action of conducting and plugging states of 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 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 perform switching actions of conduction and blocking states on the second die (5) again, so that the lunch boxes in the second die (5) fall onto the transmission device (7) arranged on the base (1).
3. The reverse air-cooling molding injection molding process according to claim 2, wherein the elastic support mechanism comprises a vertical plate (12) fixedly mounted on the horizontal plate (2) and two rotating shafts (13) movably arranged on one side of the vertical plate (12) facing the second mold (5), the second mold (5) is fixed between the two rotating shafts (13), and one of the rotating shafts (13) is connected with the turnover driving mechanism; two pivot (13) respectively through a set of flexible subassembly with riser (12) are connected, flexible subassembly is including sliding locating horizontal pole (16) on riser (12), be fixed in ring body (17) and the cover of horizontal pole (16) periphery are established cylindrical spring (18) of horizontal pole (16) periphery, the both ends of cylindrical spring (18) are connected respectively ring body (17) with riser (12), pivot (13) rotate to be installed horizontal pole (16) are kept away from the one end of riser (12).
4. The reverse air-cooling plastic injection molding process according to claim 3, wherein a discharge pipe (15) connected with a discharge port of the injection molding machine (6) is further fixedly mounted on the vertical plate (12), a material 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 material guide pipe (14) is butted with the discharge pipe (15) at the tail end of a stroke of the first mold (4) moving towards the second mold (5) so as to form an injection molding passage for guiding molten material in the injection molding machine (6) into the injection molding cavity.
5. The reverse air-cooling plastic injection molding process according to claim 3, wherein the blocking mechanism comprises a bidirectional screw rod (9) rotatably mounted on the second mold (5) and two traverse plates (11) symmetrically arranged on the bidirectional screw rod (9) and in threaded connection with the bidirectional screw rod (9), each of the two traverse plates (11) is fixedly connected with a blocking plate (8) for blocking the second mold (5); still fixed mounting has a guide bar (10) on second mould (5), guide bar (10) run through two sideslip board (11), and two sideslip board (11) with guide bar (10) sliding connection, two-way lead screw (9) still connect through fourth drive belt (38) rotate install in the axis of rotation of gear (39) of second mould (5) one side, reciprocal actuating mechanism is connected with pinion rack (40), gear (39) with pinion rack (40) cooperation, still with fixed mounting be in ring gear (41) cooperation on diaphragm (2).
6. The reverse air-cooled plastic injection molding process according to claim 5, wherein the maltese cross movement mechanism comprises a driving wheel (20) rotatably mounted on the vertical plate (3), a first driven wheel (21), a second driven wheel (22) and a driving motor (19) mounted on the vertical plate (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.
7. The reverse air-cooled plastic injection molding process according to claim 6, wherein the reciprocating driving 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), the rotating shaft of the cam (33) is connected with the rotating shaft of the first driven wheel (21) through a second bevel gear set (36) and a first driving belt (28), and the toothed plate (40) is fixedly connected with the moving plate (31); moving plate (31) with first mould (4) deviate from one side of second mould (5) is fixed, just be fixed with two protruding (32) of bar on moving plate (31), two it has the clearance to reserve between protruding (32) of bar, be fixed with cylinder (34) on cam (33), cylinder (34) stretch into in the clearance and with two protruding (32) sliding connection of bar.
8. The reverse air-cooled plastic injection molding process according to claim 7, wherein the flip-flop driving mechanism comprises a first transmission shaft (24) rotatably mounted on the vertical plate (3) and a movable arm connecting the first transmission shaft (24) and the rotating shaft (13), 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 digging arm includes the head end respectively with first transmission shaft (24) and pivot (13) rotate first linking arm (26), second linking arm (27) of connection, first linking arm (26) with the tail end of second linking arm (27) the two is passed through axle piece (25) and is rotated and is connected, axle piece (25) are connected through second drive belt (29) first transmission shaft (24), still through third drive belt (30) with pivot (13) are connected.
9. The reverse air-cooling plastic injection molding process according to claim 2, wherein the transverse plate (2) is provided with a through opening to form a passage for the meal box to fall onto the transmission device (7), a frame plate (42) is fixed at the bottom of the transverse plate (2), the frame plate (42) 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.
10. A lunch box, characterised in that it is injection moulded by a reverse air-cooled moulding injection moulding process according to claim 1.
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| CN117817945A (en) * | 2024-03-04 | 2024-04-05 | 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 |
| 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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