Two-station cup mold independent rotation drive device

Abstract

The invention discloses a two-station cup mold independent rotation driving device, comprising a driving motor, a driving gear, two driven pulleys and a belt, wherein the output end of the driving motor is connected with the driving gear, the two driven pulleys are connected with the driving gear through a belt, the axes of the driving gear and the driven pulley are vertically upward, the driving gear and the two driven pulleys form an isosceles triangle, the belts outside the two driven pulleys are in contact with the cup mold shaft, the invention can prevent the cup mold shaft from slipping due to inertia when the servo motor stops suddenly, and at the same time, the belt can be kept in a tensioned state through the two driven pulleys.

Description

Technical Field

[0001] The invention relates to a printing and conveying device for plastic cups, in particular to an independent self-rotation driving device for cup moulds with two working positions. Background Art

[0002] At present, the fast-moving consumer beverage packaging industry is dominated by plastic cups. With the gradual development of the market and changes in demand, many new cup types are constantly emerging and new packaging materials are being tried. In the process of changes in external demand, the shortcomings and defects of cup printing equipment in the current market are revealed.

[0003] Regarding the changes in cup shapes: There are more frosted high cups and highly transparent cups on the market. During the high-speed printing process, these cups will have slight friction marks due to high-speed mold application and demolding, which will affect the printing quality.

[0004] In response to changes in cup structure: market demand is diversified, and cup printing machines are beginning to be used in some new packaging fields; beverage cups with special mouth structures require that the position of the pattern relative to the cup be fixed during printing;

[0005] Regarding the change of cup materials: paper cups have been applied in the market, but the surface patterns of traditional paper cups are printed on a flat surface before forming. With the upgrading of consumption and the acceleration of product iteration, it is obvious that the traditional surface printing method of paper cups has disadvantages and cannot meet the needs of small batches and rapid customization. Customized paper cup printing requires that the printed pattern and the seam position of the paper cup be fixed. This is a new direction for cup printing machines.

[0006] For the above problems, the cup mold self-rotation drive system of the current equipment is defective. The current cup mold self-rotation drive system drives the eight cup molds on the entire mold mounting plate to rotate at the same time. For the scratch problem, under this drive mode, frosted high cups and high transparent cups will produce scratches at the cup inlet and outlet stations: at the cup inlet station, the moment when the non-rotating cup contacts the high-speed rotating cup mold will produce spiral scratches; at the cup outlet station, the moment when the cup and the cup mold are separated, because the cup mold keeps rotating at a high speed, and the cup speed is reduced, there is a speed difference between the cup and the cup mold, and this moment will also produce scratches. For special structure cup printing or paper cup printing that requires the pattern to be relatively fixed at a certain position on the circumference of the cup, the current drive structure obviously cannot meet the requirements. The cup driven by the current drive structure has a random seam at the starting position of printing or a special structure of the cup mouth, and the position of the printed pattern cannot be guaranteed to be fixed. Summary of the invention

[0007] The invention provides a two-station cup mold independent rotation driving device to solve the problem of rotation defects of the existing cup mold.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0009] The invention discloses a two-station cup mold independent rotation driving device, comprising a driving motor, a driving gear, two driven pulleys and a belt, wherein the output end of the driving motor is connected to the driving gear, the two driven pulleys and the driving gear are connected through a belt, the axes of the driving gear and the driven pulley are vertically upward, the driving gear and the two driven pulleys form an isosceles triangle, and the belts on the outer sides of the two driven pulleys are in contact with the cup mold shaft.

[0010] Furthermore, the lower end of the driving gear is installed on the driving gear mounting plate, the driving gear mounting plate is horizontally arranged, the driving gear mounting plate is installed on the divider, the cup mold shaft is circumferentially installed on the divider main shaft, and the driving gear and the driven pulley are located at the upper end of the divider main shaft.

[0011] Furthermore, the centers of the driven pulleys are respectively installed on vertical installation shafts, and the two vertical installation shafts are connected by connecting rods. The connecting rods are arranged in parallel, and a follower shaft is fixed at the center of the connecting rod. The lower part of the follower shaft is installed on a bearing seat, and the bearing seat is installed on the divider.

[0012] Furthermore, a return spring is installed on the follower shaft, and the return spring is sleeved on the lower end of the follower shaft.

[0013] Furthermore, the two ends of the connecting rod are respectively connected to spring one and spring two, spring one and spring two are horizontally arranged, spring one and spring two are symmetrically arranged on both sides of the follower shaft, and the other ends of spring one and spring two are installed on the driving gear mounting plate.

[0014] Furthermore, two connecting rods are provided, the connecting rods are vertically distributed up and down, the mounting shaft connects the two ends of the two connecting rods, and the follower shaft passes through the lower connecting rod.

[0015] Furthermore, the preload forces of spring one and spring two are the same.

[0016] Furthermore, the bottom half shaft of the follower shaft is nested on the bearing seat, the bottom of the follower shaft is coated with grease, and the bottom of the follower shaft is provided with a spring three.

[0017] Furthermore, a sensor is included, and the sensor is arranged between the two driven pulleys.

[0018] The beneficial effects of the present invention are:

[0019] The modular design of the present invention can be installed on an existing paper cup printing machine. The two driven pulleys can rotate as the cup mold shaft moves. The present invention has a large driving force and can realize rapid rotation of the cup mold in a very short time. Moreover, the surface contact between the belt and the cup mold shaft can prevent the cup mold shaft from slipping due to inertia when the servo motor stops suddenly, compared with single-point contact. At the same time, the two driven pulleys can keep the belt in a tensioned state. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] Figure 1 It is a top view of an embodiment of the present invention.

[0022] Figure 2 This is a partial diagram of an embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of a cup mold shaft extruding a first driven pulley according to an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of an embodiment of the present invention when the cup mold shaft is located between two driven pulleys.

[0025] Figure 5 This is a schematic diagram of a cup mold shaft extruding a second driven pulley according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0027] As shown in the figure, the present invention discloses a two-station cup mold independent rotation drive device, including a driving motor 1, a driving gear 2, two driven pulleys 3 and a belt 4, the output end of the driving motor 1 is connected to the driving gear 2, the two driven pulleys 3 and the driving gear 2 are connected through the belt 4, the axes of the driving gear 2 and the driven pulley 3 are vertically upward, the driving gear 2 and the two driven pulleys 3 form an isosceles triangle, and the belts 4 on the outside of the two driven pulleys 3 are in contact with the cup mold shaft 5.

[0028] In one embodiment of the present invention, the lower end of the driving gear 2 is mounted on the driving gear mounting plate 6, the driving gear mounting plate 6 is horizontally arranged, the driving gear mounting plate 6 is mounted on the divider 7, the cup mold shaft 5 is circumferentially mounted on the divider main shaft 8, and the driving gear 2 and the driven pulley 3 are located at the upper end of the divider main shaft 8.

[0029] In one embodiment of the present invention, the centers of the driven pulleys 3 are respectively mounted on vertical mounting shafts 9, and the two vertical mounting shafts 9 are connected by connecting rods 10, and the connecting rods 10 are arranged in parallel. A follower shaft 11 is fixed at the center of the connecting rods 10, and the lower part of the follower shaft 11 is mounted on a bearing seat, and the bearing seat is mounted on the divider 7. The bearing seat is not drawn in the figure. The bearing seat plays the role of mounting the follower shaft 11.

[0030] In one embodiment of the present invention, a return spring is installed on the follower shaft 11, and the return spring is sleeved on the lower end of the follower shaft. The return spring plays a role in resetting the follower shaft. When the cup mold shaft is no longer in contact with the belt, the return spring resets the two driven pulleys, and the two driven pulleys and the rotating gear form an isosceles triangle.

[0031] In one embodiment of the present invention, the two ends of the connecting rod 10 are respectively connected to a spring 12 and a spring 2 13, the spring 12 and the spring 2 13 are arranged horizontally, the spring 12 and the spring 2 13 are symmetrically arranged on both sides of the follower shaft 11, and the other ends of the spring 12 and the spring 2 13 are mounted on the driving gear mounting plate. The spring 12 and the spring 2 13 here play a reset role, which is the same as the role of the reset spring. In one embodiment, the combination of the spring 12 and the spring 2 13 is named a reset combination, and there can only be one of the reset spring and the reset combination.

[0032] In one embodiment of the present invention, two connecting rods 10 are provided, the connecting rods are vertically distributed up and down, the mounting shaft connects the two ends of the two connecting rods, and the driven shaft passes through the lower connecting rod. The design of the two connecting rods makes the driven shaft rotate more stably and reduces the axial deviation.

[0033] In one embodiment of the present invention, the preload forces of spring 12 and spring 2 13 are the same. In this way, spring 1 and spring 2 can keep the two driven pulleys in a horizontal position, so that the belt can always be in a tensioned state.

[0034] In one embodiment of the present invention, the bottom half shaft of the follower shaft is nested in the bearing seat, the bottom of the follower shaft is coated with grease, and a spring 3 is provided at the bottom of the follower shaft. The axial expansion and contraction changes can be realized while rotating at high speed, so that the slight distance changes between the mold and the driving wheel can be adaptively compensated.

[0035] The sensor is arranged between the two driven pulleys to detect the number of rotations of the cup mold shaft. When the number of rotations is sufficient, the servo motor 1 stops, which can save space. The present invention enables the cup mold shaft to rotate when the cup is transferred to the corona baking station, so as to achieve all-round baking of the back of the cup, facilitate the subsequent cup printing work, and speed up the cup printing speed.

[0036] The present invention is modular in design and can be quickly installed and removed from existing equipment without interfering with the structure of the original functional components of the equipment or affecting its functions.

[0037] like Figure 3-Figure 5 As shown, when the cup mold shaft rotates, the cup mold shaft squeezes the first driven pulley, compressing spring 12 and stretching spring 2 13, causing the belt to be in the expansion stage all the time, and then the cup mold shaft 5 enters between the two driven pulleys, and spring 1 pushes the first driven pulley so that the outer side of the belt connected to the second driven pulley half wraps the cup mold shaft; the servo motor 1 drives the belt, pushing the two driven pulleys to rotate, and the back of the belt drives the cup mold shaft to rotate, so as to realize all-round baking of the cup. When the baking time is up, the cup mold shaft rotates, squeezing the driven pulley and spring 2 13, and the cup mold shaft 5 is separated. Open, spring 2 13 pushes the driven pulley back to its original position to complete the entire independent driving process; because it is necessary to achieve all-round baking of the cup in a very short time when the divider stops intermittently, the required rotation speed is very large. The half-wrapped cup mold shaft by the belt not only has a large driving force, but can also achieve rapid rotation of the cup mold in a very short time. Moreover, the surface contact between the belt and the cup mold shaft can prevent the cup mold shaft from slipping due to inertia when the servo motor stops suddenly, compared with single-point contact. At the same time, pre-tightening force is applied by two driven pulleys and springs to keep the belt in a tensioned state.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Two-station cup mold independent rotation drive device, characterized in that: The invention comprises a driving motor, a driving gear, two driven pulleys and a belt. The output end of the driving motor is connected with the driving gear. The two driven pulleys are connected with the driving gear through a belt. The axes of the driving gear and the driven pulley are vertically upward. The driving gear and the two driven pulleys form an isosceles triangle. The belts on the outer sides of the two driven pulleys are in contact with the cup mold shaft. The lower end of the driving gear is mounted on the driving gear mounting plate. The driving gear mounting plate is horizontally arranged. The driving gear mounting plate is mounted on the divider. The circumference of the cup mold shaft is mounted on the main shaft of the divider. The driving gear and the driven pulley are located at the upper end of the main shaft of the divider. The centers of the driven pulleys are respectively mounted on vertical mounting shafts. The two vertical mounting shafts are connected through a connecting rod. The connecting rod is arranged in parallel. A follower shaft is fixed at the center of the connecting rod. The lower part of the follower shaft is mounted on a bearing seat. The bearing seat is mounted on the divider. The two ends of the connecting rod are respectively connected with a spring one and a spring two. The spring one and the spring two are arranged horizontally. The spring one and the spring two are symmetrically arranged on both sides of the follower shaft. The other ends of the spring one and the spring two are mounted on the driving gear mounting plate.

2. The two-station cup mold independent rotation driving device according to claim 1 is characterized in that: A return spring is installed on the follower shaft, and the return spring is sleeved on the lower end of the follower shaft.

3. The two-station cup mold independent rotation driving device according to claim 1 is characterized in that: There are two connecting rods, which are vertically distributed up and down. The mounting shaft connects the two ends of the two connecting rods, and the follower shaft passes through the lower connecting rod.

4. The two-station cup mold independent rotation driving device according to claim 1 is characterized in that: The preload of spring one and spring two is the same.

5. The two-station cup mold independent rotation driving device according to claim 1 is characterized in that: The bottom half shaft of the follower shaft is nested on the bearing seat, the bottom of the follower shaft is coated with grease, and a spring three is arranged at the bottom of the follower shaft.

6. The two-station cup mold independent rotation driving device according to claim 1 is characterized in that: The device also includes a sensor, which is arranged between the two driven pulleys.

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