Blanking mechanism for screw cap of milk powder can

Abstract

The utility model provides a milk powder can screw cap blanking mechanism which comprises a guide cylinder and two supporting rods, a passing gap is reserved between the two supporting rods, the passing gap is arranged under the guide cylinder, the passing gap is smaller than the diameter of a screw cap, and acute angles are formed between the two supporting rods and the horizontal plane respectively. The opening direction of the included angle faces the moving direction of the conveying belt, and the distance between one ends of the two supporting rods can be far away from each other; the conveying belt is arranged under the supporting unit. The spiral cover is erected above the conveying belt through the two guide rods, meanwhile, the edge of one side of the spiral cover extends out downwards, the upper edge of a milk powder tank passing through the lower portion of the supporting unit can make contact with the spiral cover, the spiral cover is driven to move forwards, the spiral cover is separated from the supporting rods, and the milk powder tank is covered with the spiral cover. The screw cap automatically falls through gravity, the milk powder can is conveyed through the conveying belt to achieve cooperation of the screw cap and the milk powder can, the cap falling speed and accuracy are improved, and then the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of milk powder packaging production, and particularly relates to a blanking mechanism for the screw cap of a milk powder can. Background Art

[0002] In the process of milk powder production, in order to facilitate consumers to use and store milk powder, two layers of caps, namely a tear-off cap and a screw cap, are arranged on the top of the milk powder can. During the use by consumers, the tear-off cap can be torn off, and then the milk powder can be sealed and stored through the screw cap. In the production process, the milk powder can is first sealed with the tear-off cap, and then continuously conveyed to the subsequent workstations through a conveyor belt. The screw cap is assembled on the milk powder can through the processes of blanking and cap screwing. In the existing blanking station for the screw cap, the screw caps are often stacked, and then the lowermost screw cap is pushed to a predetermined position by a cylinder to complete the blanking of the screw cap at the predetermined position. However, in this way, the pushing speed of the cylinder cannot be too fast, otherwise it is easy for the screw cap to fall in a parabolic shape under the action of inertia, and the falling position cannot be accurately judged, thereby reducing the blanking speed and affecting the progress of milk powder packaging production; there are also production lines that adsorb the screw cap through mechanisms such as suction cups and cylinders and press the screw cap on the milk powder can, but this causes the milk powder can to stop moving at the screw cap blanking station to facilitate the positioning of the suction cup and the milk powder can, which also affects the assembly progress. Content of the Utility Model

[0003] In view of this, the utility model aims to provide a blanking mechanism for the screw cap of a milk powder can to improve the blanking speed of the screw cap.

[0004] To achieve the above object, the technical solution of the utility model is realized as follows:

[0005] A blanking mechanism for the screw cap of a milk powder can includes

[0006] A guiding cylinder, both ends of which are communicated with the outside;

[0007] A supporting unit, which includes two supporting rods, and there is a passing gap between the two supporting rods. The passing gap is placed directly below the guiding cylinder, and the passing gap is smaller than the diameter of the screw cap. The two supporting rods are respectively arranged at an acute angle with the horizontal plane, and the opening direction of the angle faces the moving direction of the conveyor belt, and the distance between one ends of the two supporting rods can move away from each other;

[0008] A conveyor belt, which is placed directly below the supporting unit.

[0009] Furthermore, a supporting block extends inward from one side of the bottom of the guiding cylinder towards the moving direction of the conveyor belt, and an opening is provided on the side opposite to the supporting block.

[0010] Furthermore, a wedge-shaped portion extends upward from one side of the supporting block close to the axis of the guiding cylinder.

[0011] Furthermore, the blanking mechanism further includes a blanking piece which can rotate around its own axis. A plurality of notches are formed in the circumferential direction of the blanking piece, and a supporting portion is left between every two notches. The supporting portion can extend into the guiding cylinder through the opening of the guiding cylinder. When the notch corresponds to the opening, the projections of the blanking piece and the guiding cylinder are separated from each other.

[0012] Furthermore, a chamfer is formed in the upper part of one side edge of the supporting portion of the blanking piece.

[0013] Furthermore, a roller shaft is respectively arranged at one end of each of the supporting rods that can move away from each other.

[0014] Furthermore, the blanking mechanism further includes a pressing cover piece which is placed above the conveyor belt and on one side of the opening of the guiding cylinder.

[0015] Furthermore, the blanking piece is connected to the output shaft of a stepping motor.

[0016] Furthermore, the blanking mechanism further includes a fixed platform. A material passing hole is formed in the fixed platform, and the guiding cylinder is fixedly arranged directly above the material passing hole.

[0017] Furthermore, the higher end of the supporting rod with an angle with the horizontal plane is rotatably connected to the edge of the blanking hole, and a limiting piece is respectively arranged on each supporting rod. When the ends of the two supporting rods approach the limit position, the limiting piece can abut against the edge of the blanking hole.

[0018] Compared with the prior art, the spiral cap blanking mechanism for milk powder cans of the present utility model has the following advantages:

[0019] With the two guiding rods arranged obliquely, the spiral cap is erected above the conveyor belt, and at the same time, one side edge of the spiral cap extends downward. When the milk powder can moves along the conveyor belt to below the spiral cap, the upper edge of the milk powder can can contact the spiral cap and drive the spiral cap to move forward, so that the spiral cap is separated from the supporting rod and covers the milk powder can. The spiral cap automatically falls by gravity, and the conveyor belt is used to convey the milk powder can to realize the cooperation of the two, improving the speed and accuracy of capping, and further improving the production efficiency;

[0020] A support block is used to support one side of the spiral cap. At the same time, the inner wall of the guiding cylinder is removed from restricting the spiral cap through the opening, so that the spiral cap can be turned downward and tilted, and one side of itself falls on the supporting rod;

[0021] By arranging notches and supporting portions on the blanking piece, when the notch corresponds to the opening of the guiding cylinder, the lowermost spiral cap can be turned downward and fall. At the same time, as the blanking piece continues to rotate, the supporting portion extends into the opening to support the spiral caps falling from above;

[0022] A roller shaft is arranged on the support rod to prevent the screw cap from slipping off the support rod due to insufficient friction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0024] Figure 1 is a schematic diagram of the overall structure of the blanking mechanism;

[0025] Figure 2 is a schematic diagram of the mating structure of the support unit and the screw cap;

[0026] Figure 3 is a schematic diagram of the mating structure of the blanking piece and the screw cap;

[0027] Figure 4 is a schematic diagram of the support unit;

[0028] Figure 5 is a schematic diagram of the blanking piece;

[0029] Figure 6 is a schematic diagram of the guiding cylinder structure.

[0030] DESCRIPTION OF THE REFERENCE NUMERALS:

[0031] 1 - conveyor belt; 11 - grating; 2 - fixed platform; 21 - blanking hole; 22 - guiding cylinder; 221 - opening; 222 - support block; 223 - wedge portion; 3 - support unit; 31 - support rod; 311 - roller shaft; 312 - limiting piece; 32 - passing gap; 4 - blanking piece; 41 - notch; 42 - supporting portion; 43 - chamfer; 5 - pressing cover piece; 51 - guiding surface; 6 - milk powder can; 7 - screw cap. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments may be combined with each other.

[0033] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0034] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific circumstances.

[0035] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0036] The blanking mechanism of the screw cap 7 of the milk powder can 6 described in the utility model includes a conveyor belt 1 and a fixed platform 2 placed above the conveyor belt 1. A blanking hole 21 is formed on the fixed platform 2, and the diameter of the blanking hole 21 is larger than the diameter of the screw cap 7. A guiding cylinder 22 is fixedly arranged on the fixed platform 2. The guiding cylinder 22 is placed directly above the blanking hole 21, and the diameter of the guiding cylinder 22 is similar to the diameter of the screw cap 7, so that when the screw cap 7 is placed in the guiding cylinder 22, it can fall under the action of gravity. When the screw cap 7 rotates around the radial direction, due to the influence of the thickness of the screw cap 7, the outer wall of the screw cap 7 can interfere with the inner wall of the guiding cylinder 22, thereby preventing the screw cap 7 from rotating around its own radial direction. Both ends of the guiding cylinder 22 are communicated with the outside, so that the screw cap 7 can pass through the guiding cylinder 22 and the blanking hole 21 and fall on the conveyor belt 1. A supporting block 222 extends inward from one side of the bottom of the guiding cylinder 22 facing the moving direction of the conveyor belt 1. There is an opening 221 on the side opposite to the supporting block 222, and there is an opening 221 on the conveyor belt 1 at the opening 221, and the height of the opening 221 is the same as the thickness of the screw cap 7. When the lowermost screw cap 7 contacts the supporting block 222, due to the lack of the side wall restriction of the guiding cylinder 22 at the opening 221, the side of the screw cap 7 close to the opening 221 turns downward. In order to prevent the screw cap 7 from detaching from the supporting block 222 and falling after flipping, a wedge-shaped portion 223 also extends upward from the side of the supporting block 222 close to the axis of the guiding cylinder 22. A supporting unit 3 is also fixedly arranged on the fixed platform 2. The supporting unit 3 includes two parallel support rods 31, and there is a passing gap 32 between the two support rods 31. The passing gap 32 is placed directly below the guiding cylinder 22, and the passing gap 32 is smaller than the diameter of the screw cap 7. The two support rods 31 are respectively arranged at an acute angle with the horizontal plane, and the opening 221 direction of the angle faces the moving direction of the conveyor belt 1. More specifically, a roller shaft 311 is arranged at the higher end of the support rod 31. The higher end of the support rod 31 with an angle with the horizontal plane (that is, the end of the support rod 31 far from the roller shaft 311) is rotatably connected to the edge of the blanking hole 21, and the distance between one ends of the two support rods 31 can move away from each other. Optionally, in this embodiment, two hinge columns extend vertically upward from the edge of the blanking hole 21. The support rod 31 is rotatably connected to the hinge column, and a limiting piece 312 is respectively arranged on the inner sides of the two support rods 31. When the two support rods 31 move inward to the limit position, that is, when they are parallel, the limiting piece 312 abuts against the edge of the blanking hole 21. A torsion spring (not shown in the figure) is sleeved on the hinge shaft, and a force-receiving column is also arranged on one side of each hinge column. One leg of the torsion spring abuts against the support rod 31, and the other leg abuts against the force-receiving column, so that the support rod 31 is subjected to an external force for inward rotation. When the screw cap 7 moves out of the passing gap 32 from between the two roller shafts 311, the two support rods 31 rotate and open to both sides due to the force at the roller shaft 311 end, and then move inward under the action of the torsion spring to restore the initial state.

[0037] The blanking mechanism of the screw cap 7 of the milk powder can 6 according to the present utility model further includes a blanking piece 4. The blanking piece 4 is placed above the fixed platform 2, and the upper surface of the blanking piece 4 is in the same horizontal plane as the upper surface of the support block 222. The blanking piece 4 can rotate around its own axis, and a plurality of notches 41 are formed along the circumference of the blanking piece 4. A support portion 42 is left between every two notches 41. The support portion 42 can extend into the guide cylinder 22 through the opening 221 of the guide cylinder 22. When the notch 41 corresponds to the opening 221, the projections of the blanking piece 4 and the guide cylinder 22 are separated from each other. Specifically, a support table surface is further fixed on the upper surface of the fixed platform 2. A stepping motor and a speed reducer are fixedly arranged on the support table surface. The output shaft of the stepping motor and the central axis of the blanking piece 4 are connected through the speed reducer, so that the stepping motor can drive the blanking piece 4 to rotate. Those skilled in the art should know that the stepping motor can be controlled by a controller. By sending a pulse signal to the stepping motor, the number of rotation turns or the rotation angle of the stepping motor can be controlled, so as to drive the blanking piece 4 to rotate a predetermined angle. In this embodiment, there are four notches 41 and support portions 42 respectively, and the rotation angle of the blanking piece 4 each time is 45°. The blanking piece 4 is initially in a posture of extending into the opening 221. When the support portion 42 extends into the opening 221, it can cooperate with the support block 222 to prevent the screw cap 7 from falling. When the notch 41 corresponds to the opening 221, the side of the screw cap 7 close to the opening 221 loses support, so that one side of the screw cap 7 turns downward and falls on the support rod 31. When the blanking piece 4 rotates until the notch 41 faces the opening 221, the lowermost screw cap 7 turns downward. The screw cap 7 above the guide cylinder 22 loses the support of the lowermost screw cap 7 and moves downward under the action of gravity. Also, due to the limiting effect of the side wall of the guide sleeve on the radial rotation of the screw cap 7 at this time, a gap appears between the lowermost screw cap 7 and the screw cap 7 above during the falling process. As the blanking piece 4 continues to rotate, the support portion 42 is inserted into the gap between the two lowermost screw caps 7 at the opening 221, so as to prevent the screw cap 7 above from continuing to fall. In order to more conveniently insert the support portion 42 into the opening 221 of the two screw caps 7, a chamfer 43 is formed on the upper edge of the support portion 42 facing the guide cylinder 22 in the rotation direction.

[0038] The blanking mechanism for the screw cap 7 of the milk powder can 6 according to the present utility model further includes a capping piece 5, which is placed above the conveyor belt 1, connected to the fixed platform 2, and the capping piece 5 is placed on one side of the opening 221 of the guiding cylinder 22. Specifically, the capping piece 5 is provided with an arc-shaped guiding surface 51 facing the moving direction of the conveyor belt 1, and a guiding column extends vertically upward from the upper surface of the capping piece 5. A through hole is opened on the fixed platform 2, the guiding column passes through the through hole, and a nut is screwed on the top end of the guiding column, so that the capping piece 5 is hung below the fixed platform 2. When the milk powder can 6 and the screw cap 7 are combined, the screw cap 7 is lightly pressed above the milk powder can 6. When the milk powder can 6 passes through the capping piece, the capping piece contacts the screw cap 7 through the guiding of the guiding surface 51 and is lifted upward. At the same time, using the gravity of the capping piece 5, pressure is applied to the screw cap 7, causing the posture of the screw cap 7 to change and making the posture of the screw cap 7 flatter, which is beneficial for subsequent screw capping processing.

[0039] The blanking mechanism for the screw cap 7 of the milk powder can 6 according to the present utility model further includes a capping piece 5. During the working process, the screw caps 7 are stacked in the guiding cylinder 22. As the blanking piece 4 rotates, the lowermost screw cap 7 flips downward, and the corresponding two side edges are placed on the support rods 31, one side edge is placed on the support block 222, and the other side edge extends out through the gap 32 and is placed below the roller shafts 311. When the conveyor belt 1 conveys the milk powder can 6 to below the support platform, the top edge of the milk powder can 6 contacts the inclined screw cap 7, and during the movement of the milk powder can 6, the screw cap 7 is driven to move backward. At this time, the screw cap 7 first separates from the support block 222, and at the same time, the two roller shafts 311 are pushed apart, so that the screw cap 7 can pass through the gap 32 and fall onto the milk powder can 6, and the two support rods 31 rotate inward under the action of the torsion spring to return to the initial state. On both sides of the conveyor belt 1 below the capping piece 5, there are respectively grating sensors 11, and the grating sensors 11 are connected to the controller. When the milk powder can 6 passes through the grating sensors 11, the grating sensors 11 send signals to the controller, so that the controller controls the stepping motor to drive the blanking piece 4 to rotate, and then the next screw cap 7 falls, waiting for the next milk powder can 6 to pass, so that the milk powder can 6 can be combined with the screw cap 7 during the movement process, without the need for the milk powder can 6 to stop and wait for the screw cap 7 to be capped and buckled, improving the production efficiency.

[0040] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A screw cap blanking mechanism for a milk powder can, characterized in that: include A guide cylinder, both ends of which are connected to the outside world; The support unit comprises two support rods, and a through gap is left between the two support rods, the through gap is placed directly below the guide cylinder, and the through gap is smaller than the diameter of the screw cover, the two support rods respectively form an acute angle with the horizontal plane, and the opening direction of the angle faces the moving direction of the conveyor belt, and the distance between one ends of the two support rods can be far away from each other; A conveyor belt is placed directly below the support unit.

2. A screw cap blanking mechanism for a milk powder can according to claim 1, characterized in that: A support block extends inwardly from the bottom of the guide cylinder toward the moving direction of the conveyor belt, and an opening is arranged on the side opposite to the support block.

3. A screw cap blanking mechanism for a milk powder can according to claim 2, characterized in that: A wedge-shaped portion is extended upward from one side of the support block close to the axis of the guide cylinder.

4. A screw cap blanking mechanism for a milk powder can according to any one of claims 1 to 3, characterized in that: It also includes a blanking piece, which can rotate around its own axis, and has multiple notches along the circumference of the blanking piece, and a supporting portion is left between every two notches, and the supporting portion can extend into the guide cylinder through the opening of the guide cylinder. When the notch corresponds to the opening, the projections of the blanking piece and the guide cylinder are separated from each other.

5. A screw cap blanking mechanism for a milk powder can according to claim 4, characterized in that: The upper part of one side edge of the support part of the blanking sheet is chamfered.

6. A screw cap blanking mechanism for a milk powder can according to claim 4, characterized in that: A roller is respectively arranged at one end of each support rod that can be away from each other.

7. The screw cap blanking mechanism for a milk powder can according to claim 1, characterized in that: The utility model also comprises a pressure cover sheet which is arranged above the conveyor belt and is arranged on one side of the opening of the guide cylinder.

8. The screw cap blanking mechanism for a milk powder can according to claim 4, characterized in that: The blanking sheet is connected to the output shaft of the stepping motor.

9. The screw cap blanking mechanism for a milk powder can according to claim 1, characterized in that: It also includes a fixed platform, which is provided with a feeding hole, and the guide cylinder is fixedly arranged just above the feeding hole.

10. A screw cap blanking mechanism for a milk powder can according to claim 9, characterized in that: The higher end of the support rod which is at an angle to the horizontal plane is rotatably connected to the edge of the blanking hole, and each support rod is provided with a limit plate. When the ends of the two support rods are close to the limit position, the limit plate can abut against the edge of the blanking hole.

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