Can sealing machine

Abstract

This invention relates to a can sealing machine, comprising: a container lid feeding cylinder for storing and sequentially conveying container lids; a container lid adjusting unit capable of flipping the container lids upright and accommodating different sizes of container lids through height and width adjustment structures; a container lid guiding unit positioned above the conveyor belt for positioning the container lids at the container can opening; a vacuum sterilization unit introducing high-temperature steam into the container can via a steam guide seat to expel cold air and create a vacuum environment for sterilization; a sealing and pressing unit using multi-segment pressure rods with inclined and horizontal pressure surfaces to gradually press the container lids into the container can; and a tightening unit using two belts with speed difference to generate frictional torque to screw the container lids into the external threads of the container can, completing the seal. This invention, through modularization and multi-segment division of labor structure, achieves the sealing efficiency of a linear automated production line while ensuring the preservation quality of food.

Claims

1. A can sealing and locking machine, comprising: a machine body, provided with a conveyor belt for conveying a container can having an open upper edge space, the container can having an external thread on its outer edge corresponding to the open upper edge space; a machine base provided on the machine body at a position corresponding to the conveyor belt, the machine base forming an inner wall surface; a container cap feeding cylinder provided on the machine body, the container cap feeding cylinder having a feeding space for accommodating a plurality of container caps, the inner edge of the container cap having an internal thread matching the external thread of the container can, and an output slide rail provided on one side of the container cap feeding cylinder, the output slide rail having a slide rail, the container cap feeding cylinder employing an inclined vibration cap sorting structure to arrange the container caps in an orderly manner; a container cap adjusting unit provided on the machine body and connected to the slide rail for conveying container caps, the container cap adjusting unit including a flipping and flattening station function for conveying the container caps with the top surface facing upwards; the container cap adjusting unit including a base, the base having a track, and the base... A top cover is provided, and a height adjustment module is provided on the base corresponding to the top cover to adjust the height distance between the top cover and the base. A width adjustment module is provided in the track to adjust the track width. One end of the container cover adjustment unit has a set part. A container cover guide unit is provided on the machine body and corresponds to the conveyor belt, and is connected to the container cover adjustment unit to temporarily place the container cover in an inclined state on the side edge of the container opening without completely sealing it. The container cover guide unit includes a base component with a set end, which is assembled on the set part. The base component is connected to an upper track. The upper track has a first guide surface and a second guide surface, and a track front box is provided on each side of the upper track. Each track front box has a plurality of connecting holes to assemble a first guide rod and a second guide rod, respectively. A locking part is also provided in the track front box for assembling a locking hole for a side rail element. The bottom edges of each track front box protrude to form a side rail part. One end of the container lid guide unit is equipped with a traction rod, which has a traction rod spring. The bottom of the container lid guide unit has a container lid track, and the end of the container lid guide unit has a guide opening. One side of the container lid guide unit has an adjustment hole, and an adjustment nut is fixed to the adjustment hole. The adjustment nut allows for the installation of an adjustment knob. The container lid guide unit has a simple guiding and positioning function to ensure that the container lid and the container are coaxially aligned. A steam guide seat is located at the rear of the base, and a steam guide groove is connected to the position corresponding to the container lid guide unit. A vacuum sterilization unit has a high-temperature gas supply pipe. The high-temperature gas supply pipe fitting has a gas supply end corresponding to the steam guide seat. The gas supply end is connected to the steam guide channel so that the high-temperature gas introduced through the steam guide channel enters the area of ​​the container lid guide unit and further enters the upper edge space of the container opening, expelling the internal cold air and achieving vacuum sterilization. A sealing and pressing unit is set on the machine body and corresponds to the conveyor belt, and is connected to the container lid guide unit. The sealing and pressing unit includes a first pressing rod and a second pressing rod, wherein the bottom end of the first pressing rod is provided with a first pressing seat, and the first pressing seat and the end of the first pressing rod are pivoted by a first pivot part. Next, a first pressing surface is formed at the bottom of the first pressing seat; a second pressing seat is provided at the bottom end of the second pressing rod, and the second pressing seat is pivotally connected to the end of the second pressing rod by a second pivot part, and a second pressing surface is formed at the bottom of the second pressing seat; wherein, the first pressing surface is inclined at an angle of 10 to 20 degrees, and the second pressing surface is horizontal, used to press the container and container lid; a tightening unit is provided in the machine base and located after the sealing and pressing unit. The tightening unit includes a drive wheel and a driven wheel assembly, which are arranged opposite to each other and respectively wound with a first belt and a second belt, wherein the length ratio of the first belt to the second belt is 1. The speed of the two belts is 1.5, resulting in different speeds. When the container passes under the first and second belts via the conveyor belt, the top surface of the container lid is pushed by the friction of the two belts, generating torque, which causes the container lid to be screwed into the external thread of the container, thereby achieving a tight seal. A control unit is set on the machine base and electrically coupled to the container lid feeding cylinder, container lid adjustment unit, container lid guide unit, vacuum sterilization unit, sealing and pressing unit, and tightening unit. The control unit is used to control the operation and opening and closing of the container lid feeding cylinder, container lid adjustment unit, container lid guide unit, vacuum sterilization unit, sealing and pressing unit, and tightening unit.

2. The can-sealing and capping machine as described in claim 1, wherein, The height adjustment module of the container lid adjustment unit includes a height adjustment knob, which drives a first bevel gear to rotate. The first bevel gear meshes with and drives a second bevel gear. After rotation, the second bevel gear drives two longitudinal gear rods, causing the upper lid to move vertically up and down. The width adjustment module of the container lid adjustment unit includes a width adjustment knob, which drives a forward and reverse screw. The two ends of the forward and reverse screw drive a slider to move forward and reverse, so that each slider can expand or contract toward the inside or outside of the track to adjust the width of the track.

3. The can-sealing and capping machine as described in claim 1, wherein, The vacuum sterilization unit further includes: a compressed gas cylinder with an air inlet pipe at its top and a conduit and a branch pipe at its bottom; wherein the conduit is connected to a gas valve, one end of which is connected to a gas valve pressure gauge, the branch pipe is connected to a return water pipeline, the return water pipeline is provided with a drain valve, one end of which is connected to a water outlet pipe; the other end of the gas valve is connected to a steam supply pipeline, the steam supply pipeline includes a distribution pipe, one side of which is connected to a guide switch, the guide switch is connected to a guide pressure gauge, the other side of which is connected to a thermometer, and a gas supply switch is provided at the bottom of the distribution pipe, one end of which is connected to the high-temperature gas supply pipe.

4. The can filling and sealing machine as described in claim 3, wherein the water outlet pipe is further connected to a hot water circulation pipe, the hot water circulation pipe is connected to a hot water circulation storage tank, the hot water circulation storage tank is then connected to a return water storage tank; and the air inlet pipe at the top of the compressed gas cylinder is connected to a steam boiler.

5. The can-sealing and capping machine as described in claim 1, wherein, The linear speed of the first belt of the tightening unit ranges from 1.0 m / s to 1.5 m / s, and the linear speed of the second belt ranges from 0.6 m / s to 1.0 m / s, with the speed difference between the two ranging from 0.2 m / s to 0.5 m / s.

6. The can-sealing and capping machine as described in claim 1, wherein, The outer layers of the first and second belts of the tightening unit are covered with an elastic friction layer. The elastic friction layer is made of rubber or polyurethane to increase the coefficient of friction. The torque generated by the friction layer ranges from 0.3 N·m to 0.6 N·m to ensure that the container cap can be tightened smoothly without deformation or stripping.

7. The can-sealing and locking machine as described in claim 1, wherein the drive wheel includes a drive shaft, one end of which extends into the inner wall of the machine base, and the other end is provided with a first wheel body and a second wheel body, wherein the diameter of the second wheel body is slightly larger than that of the first wheel body; the driven wheel assembly includes a first wheel seat and a second wheel seat, the first wheel seat having a first frame, a first shaft member pivotally mounted within the first frame, and a first guide wheel pivotally mounted by the first shaft member, and a connecting frame being provided at the bottom of the first frame, the bottom of the connecting frame forming a first pivot seat, the first pivot seat having a first pivot hole; the second wheel seat having a second bracket, the second bracket having a second frame, a second shaft member pivotally mounted within the second frame, and a second guide wheel pivotally mounted by the second shaft member, and a second pivot seat being provided at the bottom of the second bracket, the second pivot seat having a second pivot hole; wherein... The first and second wheel seats are respectively assembled on a lifting adjustment seat. This lifting adjustment seat has two adjacent hangers, each hanger having a lifting hole. One end of the lifting adjustment seat has a guide end, and the bottom surface forms a bottom sliding surface with guide flanges on both sides. The other end of the lifting adjustment seat has a pivot seat, which is pivotally mounted on the first and second pivot seats respectively. A third guide wheel is disposed between the first pivot seat and the pivot seat, and a fourth guide wheel is disposed between the second pivot seat and the pivot seat. The hangers are respectively mounted on the two lifting hangers, each lifting hanger having a hanging seat. A connecting hole runs through the hanging seat, and... A fixed pin is pivoted in the lifting hole of the lifting adjustment seat, and the lifting frame is assembled on a base frame. The top of the base frame is provided with a lifting adjustment knob. The lifting adjustment knob drives a guide shaft through a worm gear mechanism, which in turn drives a worm wheel and sprocket mechanism to drive the first chain and the second chain respectively. The ends of the first chain and the second chain respectively mesh with a first sprocket and a second sprocket. The first sprocket and the second sprocket are respectively installed on the two lifting frames and drive the lifting adjustment seat to lift synchronously, so that the height of the first belt and the second belt relative to the conveyor belt is adjustable to accommodate the tightening of containers and container lids of different heights.

8. The can-sealing and locking machine as described in claim 7, wherein the connecting frame of the first wheel seat is provided with a first pivot lug, and the second bracket of the second wheel seat is provided with a second pivot lug; the inner wall of the machine base is provided with a fixed support column and a fixed support, and a tension adjustment bracket is pivotally mounted on the first pivot lug and the second pivot lug, the tension adjustment bracket having a pivot assembly end, the pivot assembly end having a pivot connection part and a pivot connection hole, and being fixed to the first pivot lug and the second pivot lug by a positioning pin; one end of the pivot assembly end is connected to a telescopic frame, the telescopic frame is equipped with a guide column, an elastic element is sleeved between the guide column and the telescopic frame, and one end of the guide column is provided with a multi-segment positioning part, the side edge of the positioning part forming a plurality of grooves with different spacings, each groove being selectively fitted into the fixed support column for positioning, thereby allowing the first wheel seat and the second wheel seat to adjust the tension of the first belt and the second belt through the elastic telescopic connection of the multi-segment positioning part of the tension adjustment bracket and the guide column.

9. The can-filling and sealing machine as described in claim 1, wherein a cooling pipe is provided in the machine base, and the cooling pipe can spray water to cool the first belt and the second belt.

10. The can-filling and capping machine as described in claim 1, wherein two support belts are provided on both sides of the conveyor belt to support the container can during transport.

Images