CN115519775A - Lunch box production equipment and working method thereof - Google Patents

Abstract

The invention relates to a lunch box production device and a working method thereof, which are characterized in that: the lunch box production equipment comprises a rack and a chain conveying belt arranged on the rack, wherein a plurality of cell shells are continuously distributed on the chain conveying belt, at least one plastic suction mold is supported on each cell shell, the bottom surface of each plastic suction mold and a cavity of each cell shell form a closed first cavity, fine holes are densely distributed on each plastic suction mold so that a forming groove of each plastic suction mold is communicated with the first cavity, a suction pipe communicated with the first cavity is arranged on the side part of each cell shell, each cell shell and the plastic suction molds on the cell shells are distributed on the chain conveying belt to form a ring shape, and every four adjacent cell shells form a group.

Description

Lunch box production equipment and working method thereof

Technical Field

The invention relates to a production device of fast food lunch boxes, in particular to a production device of lunch boxes and a working method thereof.

Background

The fast food lunch box is an article frequently used by people, and has the function that people can contain food when buying and taking out, the existing fast food lunch box production equipment is various, for example, the patent No. CN201711465371.7 discloses production equipment of a paper lunch box without cutting edges, which comprises a rack, a lower die, an upper die, a mold closing and separating driving mechanism and a water spraying mechanism; the lower die is fixedly arranged on the frame, and the die closing and separating driving mechanism is arranged on the frame and is in transmission connection with the upper die so as to drive the upper die to be in a die closing position or a die separating position; the lower die is provided with a die cavity; the water spraying mechanism comprises a water pipe which can be communicated with a water supply source, a nozzle which can be communicated with the water pipe is fixedly arranged on the water pipe, the water pipe can be connected to the rack in a sliding mode, and the sliding range of the water pipe at least comprises that the nozzle can face the die cavity; it has the following advantages: the water pipe is slid before forming, the water sprayed by the nozzle cleans the inner wall of the die cavity to prevent impurities from adhering to the inner wall of the die cavity, and after forming and die splitting, the water sprayed by the nozzle cleans the die cavity again to prevent the formed paper lunch box from being bonded with the inner wall of the die cavity, and the paper lunch box does not need to be cut before being taken out, so that a slicing mechanism is saved, the edge of the formed paper lunch box is smooth and level, and the appearance is attractive; however, the efficiency of producing fast food lunch boxes by the above equipment is low, namely, the actions of closing the upper die and the lower die, injecting paper pulp, maintaining pressure, cooling, splitting the die and the like are required every time, and the flow line production cannot be realized.

The existing developed equipment for producing the plastic fast food box in a production line manner is also produced step by step, namely, a roll of plastic thin sheet is produced by a plastic extruding machine, the plastic thin sheet is cooled and stored, when the fast food box needs to be produced, the roll of plastic thin sheet in a cooling state is preheated and softened, then the plastic thin sheet is extruded and formed through an upper die and a lower die, and finally the formed whole fast food box is stamped.

Disclosure of Invention

In view of the defects of the prior art, the invention aims to provide lunch box production equipment and a working method thereof.

In order to solve the technical problem, the technical scheme of the invention is as follows:

the invention relates to a lunch box production device, which is characterized in that: the suction pipes of the first and third cell shells are arranged on the first side part of the chain conveying belt, the suction pipes of the second and fourth cell shells are arranged on the second side part of the chain conveying belt, the inlet of the suction pipe of the first and second cell shells is arranged horizontally, and the inlet of the suction pipe of the third and fourth cell shells is arranged vertically; first negative pressure suction head, third negative pressure suction head that just are located the first side portion that the chain conveyer belt in the frame removed along with the chain conveyer belt are equipped with, first negative pressure suction head, second negative pressure suction head, third negative pressure suction head and fourth negative pressure suction head that the second side portion that just is located the chain conveyer belt in the frame removed along with the chain conveyer belt are by respective cylinder drive flexible to respectively with the entry of first cell shell suction tube, second cell shell suction tube, third cell shell suction tube and fourth cell shell suction tube to joining in marriage, realize the negative pressure suction.

Further, above-mentioned first negative pressure suction head, second negative pressure suction head, third negative pressure suction head and fourth negative pressure suction head include can follow the base that the level reciprocated slided, establish at the drive cylinder at base rear portion and establish at the anterior flexible pipe of base, be equipped with interior chamber on the base and establish before the base, the perforating hole of intercommunication interior chamber on the rear portion, penetrate flexible pipe in the perforating hole of front, be equipped with the air passing hole with interior chamber intercommunication on the flexible pipe, penetrate the telescopic link that drives actuating cylinder in the perforating hole of rear portion, the telescopic link that drives actuating cylinder and the rear portion fixed connection of flexible pipe, the front portion of flexible pipe is to joining in marriage with the entry of suction tube, be connected with the negative pressure hose with interior chamber intercommunication on the base, negative pressure hose and negative pressure pump intercommunication, flexible pipe can stretch out and draw back under the drive of drive cylinder telescopic link in the perforating hole of front portion and slide, and the flexible pipe periphery is airtight with perforating hole.

Further, the inner chamber is cylindrical and is positioned at the center of the base, the through hole is coaxial with the inner chamber, the diameter of the inner chamber is larger than that of the through hole, the sealing ring is arranged on the inner periphery of the through hole at the front part, and the driving cylinder is fixed at the rear part of the base and enables the through hole at the rear part to be hermetically sealed with the outside.

Furthermore, the front part of the extension tube is in a cover mouth shape.

Furthermore, the base is connected to a linear guide rail cylinder which is horizontally arranged, and the base drives a driving cylinder and a telescopic pipe on the base to move in a reciprocating mode so as to follow the suction pipes of the corresponding slot shells of each group.

Furthermore, an extension pipe, a base and a driving cylinder which are matched with the inlets of the first cell shell suction pipe and the second cell shell suction pipe are horizontally arranged; the extension tube, the base and the driving cylinder which are matched with the inlets of the third and fourth cell shell suction tubes are vertically arranged.

Further, the first and second sump shell suction pipes are straight pipes, a first end of the straight pipe is led into the first cavity, and a second end of the straight pipe is an inlet of the suction pipe; the third cell shell suction pipe and the fourth cell shell suction pipe are bent pipes bent by 90 degrees, the first end of each bent pipe is communicated with the first cavity, and the second end of each bent pipe is an inlet of each suction pipe.

Furthermore, a driving mechanism for assisting downward pressing forming is arranged on the rack, the driving mechanism for assisting downward pressing forming comprises a thin sheet arranged above the plastic suction mold, a pressing frame used for limiting the thin sheet at a forming groove position of the plastic suction mold is arranged above the thin sheet, the pressing frame is driven by a lifting mechanism to move up and down, the pressing frame comprises a top plate and a rectangular frame which are sequentially arranged from top to bottom, and a connecting assembly is arranged between the top plate and the rectangular frame; coupling assembling includes that at least two run through roof and downwardly extending and the fixed screw rod of rectangle frame, the screw rod middle part is equipped with well nut, is equipped with the upper nut on the screw rod that is located the roof top, be equipped with the spring between roof and the well nut.

Furthermore, the lifting mechanism comprises a first pendulum body, a second pendulum body and a pendulum rod which are sequentially hinged to the rack from left to right, a fixed body is arranged above the top plate, the lower part of the fixed body is fixedly connected with the top plate, the upper part of the fixed body is respectively connected with the left side part of the first pendulum body and the left side part of the second pendulum body through a first connecting rod and a second connecting rod, two eccentric wheels which are meshed with each other are arranged on the outer side of the first pendulum body, a first pull rod is arranged between the upper eccentric wheel positioned on the upper part and the upper part of the pendulum rod, a second pull rod is arranged between the lower eccentric wheel and the upper part of the first pendulum body, the upper part of the first pendulum body is connected with the upper part of the second pendulum body through a third connecting rod, and the first connecting rod is connected with the pendulum rod through a fourth connecting rod; the lifting mechanism can also be an air cylinder or a linear motor and is used for driving the pressing frame to move up and down; one eccentric wheel is driven by a driving motor to rotate; the fixing body comprises a fixing plate and two fixing sleeves arranged above the fixing plate, and the two fixing sleeves are respectively hinged with the lower ends of the first connecting rod and the second connecting rod through a first pin shaft; two connecting rods are arranged above the rectangular frame at intervals, and each connecting rod is fixedly connected with the screw rod on the corresponding side; gaskets are arranged between the upper nut and the top plate, between the spring and the top plate and between the middle nut and the spring.

The invention relates to a working method of lunch box production equipment, which is characterized in that: starting the chain conveying belt to work, enabling plastic sheets extruded by an extruding machine to directly and gradually enter from the inlet end of the chain conveying belt in a softened state, respectively and sequentially carrying out negative pressure suction on a first cell shell suction pipe, a second cell shell suction pipe, a third cell shell suction pipe and a fourth cell shell suction pipe when the plastic sheets are covered on the surfaces of a plurality of plastic suction molds, sucking the plastic sheets covered on the surfaces of the plastic suction molds into forming grooves of the plastic suction molds under the negative pressure suction effect, and enabling the first negative pressure suction pipe, the second negative pressure suction pipe, the third negative pressure suction pipe or the fourth negative pressure suction pipe to still keep the adsorption effect on the first cell shell suction pipe, the second cell shell suction pipe, the third cell shell suction pipe or the fourth cell shell suction pipe after adsorption until each negative pressure suction pipe is separated from adsorption after moving to the stations of four cell shells, and returning to the initial position.

The lunch box production equipment has the advantages that the plastic thin sheets directly enter the plurality of plastic suction molds for plastic suction molding processing in the softening state, so that the plastic thin sheets in the hot and softening states are directly utilized for plastic suction molding processing, the electric power and heat energy consumed for preheating the plastic thin sheets in the cold and hardening states are reduced, and the energy conservation and consumption reduction are realized; in addition, the chain conveyer belt is adopted to continuously convey the plastic sheets and carry out plastic suction molding, so that the production efficiency is improved, and meanwhile, the four groups of negative pressure suction heads are used for adsorbing the plastic sheets in the molding groove in a negative pressure manner, so that the molding of the lunch box is more sufficient, and the instability of the molding shape and structure of the product is avoided.

The invention is described in further detail below with reference to the drawings and the detailed description.

Drawings

FIG. 1 is a schematic front view of the present invention (with the first vacuum head, second vacuum head, etc. removed);

FIG. 2 is a schematic view of the top configuration of the present invention (with third, fourth, etc. negative pressure suction heads removed);

FIG. 3 is a partial view of FIG. 1 (a set of four cell shells);

FIG. 4 is a partial view of FIG. 2;

FIG. 5 is a schematic cross-sectional configuration of a single well housing and blister mold;

FIG. 6 is a schematic cross-sectional configuration of a negative pressure suction head;

FIG. 7 is a schematic structural view of an embodiment of an auxiliary push down forming driving mechanism;

FIG. 8 is a front view of the press frame;

FIG. 9 is a side view of the press frame;

FIG. 10 is a partial top view of the press frame;

FIG. 11 is a schematic view of the operation of the press frame;

fig. 12 is a partial top view of the forming groove and the pressing frame of the plastic suction mold.

Detailed Description

The invention is further explained below with reference to the drawings and the embodiments.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The invention relates to lunch box production equipment, which comprises a rack A1 and a chain conveying belt A2 arranged on the rack, wherein a plurality of groove shells A3 are continuously distributed on the chain conveying belt, each groove shell A3 is provided with at least one plastic suction mould A4 (a plastic suction mould A4 forms a lunch box), the chain conveying belt rotates circularly, the number of the groove shells A3 in the length direction is equal to the total length of the unfolded chain conveying belt divided by the width of each groove shell A3, and 2-5 plastic suction moulds A4 are arranged in the width direction of the chain conveying belt.

In the illustrations 1, 2, for the sake of simplicity of the drawing, only 4 shells are drawn in the chain conveyor, which are actually present over the entire length of the chain conveyor.

The bottom surface of the plastic suction mould A4 and the cavity of the shell A3 form a first closed cavity A5, namely the bottom surface of the plastic suction mould A4 and the cavity notch of the shell A3 are bonded and closed in a gluing mode and the like, the first cavity A5 is not communicated with the outside air, fine holes A6 are densely distributed on the plastic suction mould so that a forming groove A7 of the plastic suction mould is communicated with the first cavity A5 (namely the forming groove A7 and the first cavity A5 can only be communicated through the fine holes), a suction pipe A8 communicated with the first cavity is arranged on the side part of the shell, each shell and the plastic suction mould thereon are distributed on a chain conveyor belt to form a ring shape, wherein every four adjacent shells form a group, the four shells of each group are respectively a first shell A31, a second shell A32, a third shell A33 and a fourth shell A34, the suction pipes of the first shell A31 and the third shell A33 are arranged on the first side part of the chain, the suction pipes of the second shell and the fourth shell are arranged on the second side part of the chain conveyor belt, the suction pipe 81, the suction pipe A84 and the suction pipe 82 and the vertical inlet of the third shell A82 and the suction pipe 83 are arranged towards the horizontal shell A84; the first side portion that just is located the chain conveyer belt in the frame is equipped with first negative pressure suction head A91, the third negative pressure suction head A93 that removes along with the chain conveyer belt, the second side portion that just is located the chain conveyer belt in the frame A1 is equipped with second negative pressure suction head A92, the fourth negative pressure suction head A94 that remove along with the chain conveyer belt, and first negative pressure suction head A91, second negative pressure suction head A92, third negative pressure suction head A93 and fourth negative pressure suction head A94 are flexible by respective cylinder A10 drive to match with the entry of first cell shell suction tube A81, second cell shell suction tube A82, third cell shell suction tube A83 and fourth cell shell suction tube A84 respectively, realize the negative pressure suction.

Specifically, the first and second sump shell suction pipes a81 and a82 are straight pipes, a first end of the straight pipe is led into the first cavity, a second end of the straight pipe is an inlet of the suction pipe, and the first and second negative pressure suction heads a91 and a92 are horizontally arranged and extend and retract to be matched with the inlets of the first and second sump shell suction pipes a81 and a 82; third cell shell suction tube and fourth cell shell suction tube are the return bend of 90 degrees buckles, and the first end of return bend lets in first cavity, and the second end of this return bend is the entry of suction tube, and third negative pressure suction head A93 and the vertical setting of fourth negative pressure suction head A94 are flexible in order to match with the entry of third cell shell suction tube and fourth cell shell suction tube.

The first negative pressure suction head, the second negative pressure suction head, the third negative pressure suction head and the fourth negative pressure suction head have the same structure, and specifically comprise a base A11 capable of sliding horizontally in a reciprocating manner, a driving cylinder A10 arranged at the rear part of the base and a telescopic pipe A12 arranged at the front part of the base, wherein the base can slide horizontally in a reciprocating manner through being connected to a linear guide rail cylinder A20 (not mentioned in the prior art), the base drives the driving cylinder and the telescopic pipe on the base to move in a reciprocating manner so as to follow the suction pipes of all groups of corresponding tank shells, the base is provided with an inner chamber A13 and through holes A14 which are arranged at the front part and the rear part of the base and communicated with the inner chamber, the telescopic pipe A12 penetrates through the through hole at the front part, and the telescopic pipe is provided with an air passing hole A15 communicated with the inner chamber, penetrate the telescopic link A16 that drives actuating cylinder in the perforating hole at rear portion, the telescopic link A16 that drives actuating cylinder and the rear portion fixed connection of flexible pipe, the anterior of flexible pipe A12 and the entry of suction tube A8 are to joining in marriage (the front portion of flexible pipe is the cover mouth form promptly, and inside can also be equipped with the sealing washer to cover the entry of suction tube A8), be connected with the negative pressure hose A17 with interior cavity intercommunication on the base, negative pressure hose and negative pressure pump A18 intercommunication, flexible pipe can be flexible the slip under the drive of drive cylinder telescopic link in the perforating hole of anterior, and flexible pipe periphery and perforating hole internal peripheral air-tight seal, and when negative pressure pump A18 worked, the air was in proper order through shaping recess A7, pore A6, first cavity A5, suction tube A8, the flexible pipe A12, interior cavity A13, negative pressure hose A17 and negative pressure pump A18 of negative pressure suction head.

Specifically, the inner chamber is cylindrical and is positioned at the central part of the base, the through hole A14 is coaxial with the inner chamber A13, the diameter of the inner chamber is larger than that of the through hole, a sealing ring A19 can be arranged on the inner periphery of the through hole at the front part, so that the outer periphery of the telescopic pipe and the inner periphery of the through hole are sealed, the driving cylinder is fixed at the rear part of the base, and the through hole at the rear part is sealed with the outside.

If the suction pipes of each group of four cell shells are horizontally arranged, and the inlets of the suction pipes are horizontally aligned with the negative pressure suction head, interference can be generated, so that the telescopic pipes, the base and the driving cylinder which are aligned with the inlets of the first cell shell suction pipe and the second cell shell suction pipe are horizontally arranged; the telescopic pipe, the base and the driving cylinder which are matched with the inlets of the third and fourth cell shell suction pipes are vertically arranged, so that the first negative pressure suction head and the second negative pressure suction head are horizontally arranged on different sides, and the third negative pressure suction head and the fourth negative pressure suction head are vertically arranged on different sides.

The chain conveyer belt A2 is provided with a feeding end and a discharging end, a plastic extruding machine A22 is arranged at the feeding end and extrudes plastic sheets, the plastic extruding machine is the prior art, the description is not accumulated, a constant temperature pipe A21 is arranged at the feeding end of the chain conveyer belt A2, the temperature of the sheets is favorably kept when the sheets pass through the constant temperature pipe, the subsequent plastic sucking molding processing is favorably realized, the constant temperature pipe is a stainless steel pipe or a copper pipe connected to a rack, and constant temperature water is introduced into the stainless steel pipe or the copper pipe in an internal circulation mode.

The suction of the thin sheet 2 into the forming pocket A7 cannot be achieved well by the above-mentioned force of the simple negative pressure suction, and therefore needs an additional pressure, which will be described as a configuration of the additional pressure.

Be equipped with supplementary drive mechanism who pushes down the shaping on frame A1, supplementary thin sheet 2 of pushing down the shaping, the thin sheet top is provided with the pressure frame 3 that is used for spacing shaping recess A7 position department at the plastic uptake membrane with the thin sheet, presses the frame to reciprocate by the 4 drives of elevating system, press the frame including roof 31 and the rectangle frame 32 that from top to bottom set gradually, be provided with coupling assembling between roof and the rectangle frame.

In this embodiment, can fully press thin sheet 2 on plastic suction mould A4 in order to guarantee to press the frame, coupling assembling includes four screws 33 that set up in 31 four corners positions of roof, and every screw runs through the through-hole of roof (the through-hole diameter is greater than the screw diameter) and downwardly extending and rectangle frame fixed connection, screw middle part is equipped with well nut 34, is located to be equipped with on the screw of roof top nut 35, be equipped with spring 36 between roof and the well nut, the screw below adopts lower nut 37 to install on the rectangle frame.

The lifting mechanism comprises a first pendulum body 402, a second pendulum body 403 and a pendulum rod 404 which are sequentially hinged to a rack A1 from left to right, wherein a fixed body 5 is arranged above a top plate, the lower portion of the fixed body is fixedly connected with the top plate, the upper portion of the fixed body is respectively connected with the left side portion of the first pendulum body and the left side portion of the second pendulum body through a first connecting rod 406 and a second connecting rod 407, two eccentric wheels 408 which are meshed with each other are arranged on the outer side of the first pendulum body, a first pull rod 409 is arranged between the upper eccentric wheel and the upper portion of the pendulum rod 404, a second pull rod 410 is arranged between the lower eccentric wheel (rotatably hinged to the rack) and the upper portion of the first pendulum body, the upper portion of the first pendulum body is connected with the upper portion of the second pendulum body through a third connecting rod 411, two ends of the third connecting rod 411 are respectively hinged to the first pendulum body and the second pendulum body, the first connecting rod 406 is connected with the pendulum rod 404 through a fourth connecting rod 412, and two ends of the fourth connecting rod 412 are respectively hinged to the first connecting rod and the pendulum rod.

One end of the first pull rod 409 and one end of the second pull rod 410 are eccentrically hinged on the eccentric wheel through a third hinge shaft 413, and the other end of the first pull rod and the other end of the second pull rod are respectively hinged with the upper rear part of the first pendulum body 402 and the upper part of the pendulum body 404; one of the eccentric wheels is driven to rotate by a driving motor 414 fixed on the frame; the right parts of the first pendulum body and the second pendulum body are hinged with the frame through a first hinge shaft 415, and the middle part of the pendulum body is hinged with the frame through a second hinge shaft 405.

During operation, the driving motor 414 drives the two eccentric wheels 408 to rotate in opposite directions, one of the eccentric wheels drives the first pendulum body 402 to swing around the first hinge shaft 415 via the second pull rod 410, the first pendulum body 402 drives the second pendulum body 403 to swing around the first hinge shaft 415 via the third pull rod 411, the other eccentric wheel drives the swing rod 404 to swing around the second hinge shaft 405 via the first pull rod 409, drives the first link 406 to swing via the fourth link 412, drives the fixing body 5 and the pressing frame 3 to swing, and enables the pressing frame to do arc-shaped lifting motion through the cooperation, when the thin sheet is conveyed to the forming groove position of the blister mold, the pressing frame presses the periphery of the thin sheet in the row, so that the thin sheet is tightly attached to the upper side of the row of forming grooves on the blister mold, and vacuum holes (fine holes A6) in the forming grooves suck the thin sheet into the forming grooves for forming, thereby completing the blister operation.

It should be noted here that when the pressing frame presses the thin sheet, the blister mold performs blister forming (i.e. the negative pressure suction head performs negative pressure suction on the suction pipe to suck the thin sheet into the forming groove to perform blister forming), after the blister forming is completed, the pressing frame leaves the thin sheet, and when a new thin sheet moves to the place, the pressing frame is pressed down again.

In this embodiment, the fixing body includes a fixing plate 51 and two fixing sleeves 52 disposed above the fixing plate, and the two fixing sleeves 52 are respectively hinged to the lower ends of the first connecting rod 406 and the second connecting rod 407 via a first pin 416; the upper parts of the first connecting rod 406 and the second connecting rod 407 are respectively hinged with the first pendulum body 402 and the second pendulum body 403 through a second pin 417; two connecting rods 39 are arranged above the rectangular frame at intervals, and each connecting rod is fixedly connected with the corresponding side screw; gaskets 38 are arranged between the upper nut and the top plate, between the spring and the top plate and between the middle nut and the spring.

The lifting mechanism can also be a cylinder or a linear motor and is used for driving the pressing frame to move up and down.

The working method of the first negative pressure suction head, the second negative pressure suction head, the third negative pressure suction head and the fourth negative pressure suction head is that the circulation is carried out on the first station K1, the first station K2, the first station K3 and the first station K4 of the chain conveyer belt A2, namely, the first negative pressure suction head initially carries out butt joint negative pressure suction on a first trough shell suction pipe from the first station K1 of the chain conveyer belt A2 (at the moment, a rectangular frame is simultaneously pressed on the upper surface of a thin sheet to seal a forming groove, under the action of the negative pressure, the thin sheet with good thermal plasticity forms a concave shape identical to the forming groove), then the first negative pressure suction head moves along with the first trough shell and the chain conveyer belt until the first negative pressure suction head moves to the fourth station K4, the first negative pressure suction head is separated from the negative pressure suction of the first trough shell suction head, then the first negative pressure suction head returns to the initial position through a linear guide rail, and other second negative pressure suction head, the third negative pressure suction head and the fourth negative pressure suction head are arranged from the first station K1 of the chain conveyer belt A2 to the forming station K4, so that the concave shape groove of the forming groove can be stably arranged from the first station K1 to the fourth station K4, even if the working method is favorable for the step, the first negative pressure suction head is arranged, so that the lunch box can be arranged in the step, and the first negative pressure suction head.

The invention discloses a working method of lunch box production equipment, which comprises the steps of starting a chain conveyor belt to work, enabling plastic sheets extruded by an extruding machine to directly and gradually enter from a feeding end of the chain conveyor belt in a softened state, respectively and sequentially carrying out negative pressure suction on a first channel shell suction pipe, a second channel shell suction pipe, a third channel shell suction pipe and a fourth channel shell suction pipe when the plastic sheets are covered on the surfaces of a plurality of plastic suction molds, enabling the plastic sheets covered on the surfaces of the plurality of plastic suction molds to be sucked into a forming groove of the plastic suction molds under the action of the negative pressure suction when a rectangular frame is pressed on the surfaces of the sheets (the time for pressing the rectangular frame is short and only at a first station), enabling the plastic sheets to form a concave shape the same as the forming groove, enabling the first negative pressure suction pipe, the second negative pressure suction pipe, the third negative pressure suction pipe or the fourth negative pressure suction pipe to still keep the suction pipes of the first channel shell, the second channel shell, the third negative pressure suction pipe or the fourth negative pressure suction pipe to move back to the initial position of the first channel shell, and enabling the suction pipes to move back to the four channel shells.

The lunch box production equipment has the advantages that the plastic sheets directly enter the plurality of plastic suction molds for plastic suction molding processing in a softened state, so that the plastic suction molding processing is favorably and directly carried out by utilizing the plastic sheets in a hot and softened state, the electric power and heat energy consumed by preheating the plastic sheets in a cold and hardened state are reduced, and the energy conservation and consumption reduction are realized; in addition, the chain conveyer belt is adopted to continuously convey the plastic sheets and carry out plastic suction molding, so that the production efficiency is improved, and meanwhile, the four groups of negative pressure suction heads alternately adsorb the plastic sheets in the molding groove in a negative pressure manner, so that the molding of the lunch box is more sufficient, and the instability of the molding shape and structure of the product is avoided.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention will still fall within the protection scope of the technical solution of the present invention.

Claims (10)

1. The utility model provides a cutlery box production facility which characterized in that: the suction pipes of the first and third cell shells are arranged on the first side part of the chain conveying belt, the suction pipes of the second and fourth cell shells are arranged on the second side part of the chain conveying belt, the inlet of the suction pipe of the first and second cell shells is arranged horizontally, and the inlet of the suction pipe of the third and fourth cell shells is arranged vertically; a first negative pressure suction head and a third negative pressure suction head which move along with the chain conveying belt are arranged on the rack and positioned at the first side part of the chain conveying belt, a second negative pressure suction head and a fourth negative pressure suction head which move along with the chain conveying belt are arranged on the rack and positioned at the second side part of the chain conveying belt, and the first negative pressure suction head, the second negative pressure suction head, the third negative pressure suction head and the fourth negative pressure suction head are driven by respective cylinders to extend and retract so as to be respectively matched with inlets of the first cell shell suction pipe, the second cell shell suction pipe, the third cell shell suction pipe and the fourth cell shell suction pipe, so that negative pressure suction is realized; the chain conveyer belt has a feeding end and a discharging end, a plastic extruding machine is arranged at the feeding end, a constant temperature pipe is arranged at the feeding end of the chain conveyer belt, and constant temperature water is circularly introduced into the constant temperature pipe.

2. Lunch box production equipment as claimed in claim 1, characterized in that: first negative pressure suction head, second negative pressure suction head, third negative pressure suction head and fourth negative pressure suction head include can follow the base that the level reciprocated slided, establish at the base rear portion drive actuating cylinder and establish at the anterior flexible pipe of base, be equipped with the inner chamber on the base and establish before the base, the perforating hole of upper and lower intercommunication inner chamber on the rear portion, penetrate flexible pipe in the perforating hole of front, be equipped with on the flexible pipe with the air passing hole of inner chamber intercommunication, penetrate the telescopic link that drives actuating cylinder in the perforating hole of rear portion, the telescopic link that drives actuating cylinder and the rear portion fixed connection of flexible pipe, the front portion of flexible pipe is to joining in marriage with the entry of suction tube, be connected with the negative pressure hose with inner chamber intercommunication on the base, negative pressure hose and negative pressure pump intercommunication, flexible pipe can be flexible slip under the drive of actuating cylinder telescopic link in the perforating hole of front portion, and periphery and flexible intraductal circumference are airtight.

3. Lunch box production equipment as claimed in claim 2, characterized in that: the inner chamber is cylindrical and is positioned in the center of the base, the through hole is coaxial with the inner chamber, the diameter of the inner chamber is larger than that of the through hole, a sealing ring is arranged on the inner periphery of the through hole in the front part, and the driving cylinder is fixed on the rear part of the base and enables the through hole in the rear part to be hermetically sealed with the outside.

4. Lunch box production equipment as claimed in claim 2, characterized in that: the front part of the extension tube is in a cover mouth shape.

5. A cutlery box production apparatus according to claim 2, 3 or 4, wherein: the base is connected to a linear guide rail cylinder which is horizontally arranged, and the base drives a driving cylinder and a telescopic pipe on the base to move in a reciprocating mode so as to follow the suction pipes of all groups of corresponding slot shells.

6. Lunch box production equipment as claimed in claim 5, wherein: the extension pipe, the base and the driving cylinder which are matched with the inlets of the first and second shell suction pipes are horizontally arranged; the extension tube, the base and the driving cylinder which are matched with the inlets of the third and fourth cell shell suction tubes are vertically arranged.

7. Lunch box production equipment as claimed in claim 1, characterized in that: the first and second tank shell suction pipes are straight pipes, a first end of the straight pipe is communicated with the first cavity, and a second end of the straight pipe is an inlet of the suction pipe; the third cell shell suction pipe and the fourth cell shell suction pipe are bent pipes bent by 90 degrees, the first end of each bent pipe is communicated with the first cavity, and the second end of each bent pipe is an inlet of each suction pipe.

8. Lunch box production equipment as claimed in claim 1, characterized in that: the machine frame is provided with a driving mechanism for assisting downward pressing, the driving mechanism for assisting downward pressing comprises a thin sheet arranged above the plastic suction mold, a pressing frame used for limiting the thin sheet at a forming groove position of the plastic suction mold is arranged above the thin sheet, the pressing frame is driven by a lifting mechanism to move up and down, the pressing frame comprises a top plate and a rectangular frame which are sequentially arranged from top to bottom, and a connecting assembly is arranged between the top plate and the rectangular frame; coupling assembling includes that at least two run through roof and downwardly extending and the fixed screw rod of rectangle frame, the screw rod middle part is equipped with well nut, is located to be equipped with the nut on the screw rod of roof top, be equipped with the spring between roof and the well nut.

9. Lunch box production equipment as claimed in claim 8, wherein: the lifting mechanism comprises a first pendulum body, a second pendulum body and a pendulum rod which are sequentially hinged to the rack from left to right, a fixed body is arranged above the top plate, the lower part of the fixed body is fixedly connected with the top plate, the upper part of the fixed body is respectively connected with the left side part of the first pendulum body and the left side part of the second pendulum body through a first connecting rod and a second connecting rod, two eccentric wheels which are meshed with each other are arranged on the outer side of the first pendulum body, a first pull rod is arranged between the eccentric wheel positioned above and the upper part of the pendulum rod, a second pull rod is arranged between the eccentric wheel positioned below and the upper part of the first pendulum body, the upper part of the first pendulum body is connected with the upper part of the second pendulum body through a third connecting rod, and the first connecting rod is connected with the pendulum rod through a fourth connecting rod; the lifting mechanism can also be an air cylinder or a linear motor and is used for driving the pressing frame to move up and down; one eccentric wheel is driven by a driving motor to rotate; the fixing body comprises a fixing plate and two fixing sleeves arranged above the fixing plate, and the two fixing sleeves are respectively hinged with the lower ends of the first connecting rod and the second connecting rod through a first pin shaft; two connecting rods are arranged above the rectangular frame at intervals, and each connecting rod is fixedly connected with the screw rod on the corresponding side; gaskets are arranged between the upper nut and the top plate, between the spring and the top plate and between the middle nut and the spring.

10. A method of operating the lunch box producing apparatus as claimed in any one of claims 1-9, wherein: starting the chain conveyer belt to work, enabling the plastic sheets extruded by the plastic extruding machine to directly and gradually enter from the inlet end of the chain conveyer belt in a softened state, and when the plastic sheets are covered on the surfaces of a plurality of plastic suction molds, respectively and sequentially carrying out negative pressure suction on a first tank shell suction pipe, a second tank shell suction pipe, a third tank shell suction pipe and a fourth tank shell suction pipe, so that the plastic sheets covered on the surfaces of the plurality of plastic suction molds are sucked into a forming groove of the plastic suction molds under the action of the negative pressure suction, and after the plastic sheets are adsorbed, the first negative pressure suction pipe, the second negative pressure suction pipe, the third negative pressure suction pipe or the fourth negative pressure suction pipe still keep the adsorption action on the first tank shell suction pipe, the second tank shell suction pipe, the third tank shell suction pipe or the fourth tank shell suction pipe until each negative pressure suction pipe is separated from the adsorption after the plastic sheets move forward to the stations of the four tank shells and returns to the initial position.

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