Double stroke cutting machine

Abstract

The present invention discloses a double-stroke cutting machine, comprising an upper fixed plate, a lower fixed plate, a pressure plate, a connecting rod assembly, a connecting head, a power connecting rod, an eccentric wheel, a pressure plate moving driving member, and a pressure plate pressurizing driving member; the connecting rod assembly is driven to rotate by the pressure plate moving driving member and the pressure plate pressurizing driving member, so as to realize the lifting and lowering of the pressure plate to open and close the mold, wherein the pressure plate moving driving member drives the connecting rod assembly to move in a large stroke, and the pressure plate pressurizing driving member drives the connecting rod assembly to move in a small stroke at the position about to close the mold, which can more accurately control the mold closing accuracy and greatly improve the cutting efficiency of products with a small depth.

Description

Technical Field

[0001] The invention relates to the field of punching equipment, in particular to a double-stroke cutting machine. Background Art

[0002] Punching machine is a commonly used processing equipment, which is used to shape and cut pulp moldings and products. The slurry absorption and shaping time of pulp molding is slow, and it takes time to evaporate the residual water in the pulp molding. Therefore, when punching pulp molding, the mold closing speed can be controlled to slow down; but when punching products with a small longitudinal depth, such as box lids, cup lids and other products, it is necessary to control and speed up the mold closing speed. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, an embodiment of the present invention proposes a double-stroke cutting machine, including an upper fixed plate, a lower fixed plate, a pressure plate, a connecting rod assembly, a connecting head, a power connecting rod, an eccentric wheel, a pressure plate moving drive, and a pressure plate pressurizing drive; a column is installed between the upper fixed plate and the lower fixed plate, the pressure plate is slidably installed between the upper fixed plate and the lower fixed plate, and the pressure plate and the upper fixed plate are connected by a connecting rod assembly; the connecting head is connected to the connecting rod assembly; the upper end of the power connecting rod is connected to an eccentric connecting rod; the eccentric wheel is installed on the lower section of the power connecting rod, and the wheel axle of the eccentric wheel is rotatably connected to the connecting head; the pressure plate moving drive is connected to the eccentric connecting rod; the pressure plate pressurizing drive is connected to the wheel axle of the eccentric wheel.

[0004] The present invention has at least the following beneficial effects:

[0005] 1. The connecting rod assembly is driven to rotate by the pressing plate moving drive member and the pressing plate pressurizing drive member, thereby realizing the lifting and lowering of the pressing plate to open and close the mold. The pressing plate moving drive member drives the connecting rod assembly to move in a large stroke, while the pressing plate pressurizing drive member drives the connecting rod assembly to move in a small stroke at the position of the mold to be closed, which can more accurately control the mold closing accuracy and greatly improve the cutting efficiency of products with small depth.

[0006] 2. When the pulp molding is punched, the connecting rod assembly is driven by the pressing plate moving driving member to make the pressing plate perform a large stroke of mold closing. At this time, the pressing plate is heated by the heater, so that the pressing plate performs hot pressing and punching of the pulp molding; at the same time, the speed of mold closing of the pressing plate is slowed down by the pressing plate moving driving member, and the shaping time in the punching process is extended, so that the moisture in the pulp molding can be fully evaporated by heat. When the minimum mold closing position is reached, the connecting rod assembly is driven by the pressing plate pressure driving member to make the pressing plate perform a pressurizing stroke. The stroke distance is short and the pressure is high, so that the pressing plate continues to press down the pulp molding, further presses out the moisture in the pulp molding and evaporates it by heat, so as to realize the gradual water control of the pulp molding. At the same time, the pulp molding can be pressed thin by accurately controlling the stroke of the pressure driving member.

[0007] 3. When punching products with a small longitudinal depth, when the pressure plate reaches the minimum mold closing position, the connecting rod assembly is driven by the pressure plate pressure drive to make the pressure plate perform a pressure stroke with a short distance and high pressure. At the same time, by accurately controlling the speed of the pressure plate pressure drive, the stroke distance is short and the speed is fast, thereby achieving high-speed punching for products with a small longitudinal depth.

[0008] According to some embodiments of the present invention, the connecting rod assemblies are provided in six groups, three groups of the connecting rod assemblies are respectively connected to two opposite sides of the connecting head, and latch rods are interposed between the three groups of the connecting rod assemblies on the same side.

[0009] According to some embodiments of the present invention, the connecting rod assembly includes a first connecting rod, a second connecting rod, and a third connecting rod. The first connecting rod is rotatably connected to the upper fixed plate, the second connecting rod is rotatably connected to the pressure plate, and the first connecting rod and the second connecting rod are rotatably connected; one end of the third connecting rod is rotatably connected to the middle part of the first connecting rod, and the other end of the third connecting rod is rotatably connected to the connecting head.

[0010] According to some embodiments of the present invention, a first connecting rod seat is fixed to the bottom surface of the upper fixed plate, and the first connecting rod seat is rotatably connected to the first connecting rod; a second connecting rod seat is fixed to the top surface of the pressure plate, and the second connecting rod seat is rotatably connected to the second connecting rod.

[0011] According to some embodiments of the present invention, a guide column seat is fixedly mounted on the pressure plate, a guide column is fixed on the guide column seat, and the guide column passes through the connecting head and the upper fixed plate in sequence from bottom to top.

[0012] According to some embodiments of the present invention, an auxiliary cylinder is fixed on the upper fixed plate, and a piston rod of the auxiliary cylinder is connected to the pressing plate.

[0013] According to some embodiments of the present invention, the upper section of the column is provided with a threaded rod section, the threaded rod section is threaded with a lifting nut, the lifting nut is installed at the corners of the upper fixed plate, the upper end of the lifting nut is provided with a lifting sprocket, the lifting sprocket is wound with a chain, and the chain is also wound around a power sprocket group.

[0014] According to some embodiments of the present invention, the power sprocket assembly includes a power sprocket and a driven sprocket. The power sprocket is arranged opposite to the driven sprocket. The power sprocket is used to drive the chain to rotate. A pressure wheel is also installed on the chain.

[0015] According to some embodiments of the present invention, a locking cylinder is fixed on the upper fixed plate, a piston rod of the locking cylinder is connected to a locking cross bar, locking push rods are installed at the bottom of both ends of the locking cross bar, and the lower end of the locking push rod abuts against the top of the column.

[0016] According to some embodiments of the present invention, the pressing plate moving driving member and the pressing plate pressing driving member adopt servo motors.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 It is an overall schematic diagram of an embodiment of the present invention;

[0020] Figure 2 It is an overall top view schematic diagram of an embodiment of the present invention;

[0021] Figure 3 for Figure 2 Schematic diagram of the cross section of AA;

[0022] Figure 4 for Figure 2 Schematic cross-section of the middle BB;

[0023] Figure 5 A schematic diagram of a connecting rod assembly according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the minimum mold closing state of an embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of a pressurized state of an embodiment of the present invention;

[0026] Figure 8 Schematic diagram of the maximum mold opening state of an embodiment of the present invention. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] Reference Figure 1A double-stroke cutting machine includes an upper fixed plate 100, a lower fixed plate 200, a pressing plate 300, a connecting rod assembly 400, a connecting head 600, a power connecting rod 700, an eccentric wheel 900, a pressing plate moving driving member 1000, and a pressing plate pressurizing driving member 2000; a column 500 is installed between the upper fixed plate 100 and the lower fixed plate 200, and the pressing plate 300 is slidably installed between the upper fixed plate 100 and the lower fixed plate 200. It is connected to the upper fixed plate 100 via a connecting rod assembly 400; the connecting head 600 is connected to the connecting rod assembly 400; the upper end of the power connecting rod 700 is connected to the eccentric connecting rod 800; the eccentric wheel 900 is installed on the lower section of the power connecting rod 700, and the axle of the eccentric wheel 900 is rotatably connected to the connecting head 600; the pressure plate moving drive component 1000 is connected to the eccentric connecting rod 800; the pressure plate pressurizing drive component 2000 is connected to the axle of the eccentric wheel 900.

[0029] The connecting rod assembly 400 is driven to rotate by the pressure plate moving drive member 1000 and the pressure plate pressurizing drive member 2000, thereby realizing the lifting and lowering of the pressure plate 300 to open and close the mold. The pressure plate moving drive member 1000 drives the connecting rod assembly 400 to move in a large stroke, while the pressure plate pressurizing drive member 2000 drives the connecting rod assembly 400 to move in a small stroke at the position about to close the mold, which can more accurately control the mold closing accuracy and greatly improve the cutting efficiency of products with a small depth.

[0030] Specifically, when punching pulp molding, two punching strokes are used:

[0031] Reference Figures 6 to 8 As shown, in stroke one, the connecting rod assembly 400 is driven by the pressing plate moving driving member 1000 to make the pressing plate 300 perform a large stroke of mold closing. At this time, the pressing plate 300 is heated by the heater, so that the pressing plate 300 performs hot pressing and punching on the pulp molding; at the same time, the speed of mold closing of the pressing plate 300 is slowed down by the pressing plate moving driving member 1000, and the shaping time in the punching process is extended, so that the moisture in the pulp molding can be fully evaporated by heat.

[0032] In stroke two, when the minimum mold closing position is reached, the connecting rod assembly 400 is driven by the pressure plate pressure driving member 2000 to make the pressure plate 300 perform a pressure stroke. The stroke has a short distance and a high pressure, so that the pressure plate 300 continues to press down the pulp molding, further pressing out the water in the pulp molding and evaporating it by heat, thereby realizing pulp molding with gradual water control. At the same time, the pulp molding can be pressed thinner by accurately controlling the stroke of the pressure driving member.

[0033] Reference Figures 6 to 8 As shown, specifically, when punching a product with a small longitudinal depth, two punching strokes are used:

[0034] In stroke 1, the pressing plate moving driving member 1000 drives the connecting rod assembly 400 to make the pressing plate 300 perform a large stroke of mold closing, so that the pressing plate 300 reaches the minimum mold closing position.

[0035] In stroke two, after reaching the minimum mold closing position, the connecting rod assembly 400 is driven by the pressure plate pressure driving member 2000 to make the pressure plate 300 perform a pressure stroke. At the same time, by accurately controlling the speed of the pressure plate pressure driving member 2000, the stroke distance is short and the speed is fast, thereby realizing high-speed punching for products with a small longitudinal depth.

[0036] Specifically, the pressing plate moving driving component 1000 and the pressing plate pressing driving component 2000 adopt servo motors.

[0037] Reference Figure 5 As shown, the connecting rod assemblies 400 are provided in six groups, and three groups of connecting rod assemblies 400 are respectively connected to the two opposite sides of the connector 600, and latch rods 440 are interlaced between the three groups of connecting rod assemblies 400 on the same side.

[0038] The connecting rod assembly 400 includes a first connecting rod 410, a second connecting rod 420, and a third connecting rod 430. The first connecting rod 410 is rotatably connected to the upper fixed plate 100, the second connecting rod 420 is rotatably connected to the pressure plate 300, and the first connecting rod 410 and the second connecting rod 420 are rotatably connected; one end of the third connecting rod 430 is rotatably connected to the middle part of the first connecting rod 410, and the other end of the third connecting rod 430 is rotatably connected to the connecting head 600.

[0039] Specifically, a first connecting rod seat 450 is fixed on the bottom surface of the upper fixing plate 100 , and the first connecting rod seat 450 is rotatably connected to the first connecting rod 410 ; a second connecting rod seat 460 is fixed on the top surface of the pressing plate 300 , and the second connecting rod seat 460 is rotatably connected to the second connecting rod 420 .

[0040] Reference Figure 5 As shown, in order to improve the stability of the connector 600 during the lifting process, a guide column seat 3000 is fixedly installed on the pressing plate 300, and a guide column 3100 is fixed on the guide column seat 3000. The guide column 3100 passes through the connector 600 and the upper fixing plate 100 from bottom to top.

[0041] Reference Figure 1 As shown, an auxiliary cylinder 4000 is fixed on the upper fixed plate 100 , and a piston rod of the auxiliary cylinder 4000 is connected to the pressing plate 300 , so that the lifting and lowering of the pressing plate 300 is assisted by the auxiliary cylinder 4000 .

[0042] Reference Figure 2As shown, in order to adapt to products of different specifications, the height of the pressing plate 300 at the minimum mold closing position is finely adjusted, and a threaded rod section is provided at the upper section of the column 500, and a lifting nut 510 is threadedly installed on the threaded rod section. The lifting nut 510 is installed at the corner of the upper fixed plate 100, and a lifting sprocket 520 is installed on the upper end of the lifting nut 510. A chain is wound around the lifting sprocket 520, and the chain is also wound around the power sprocket group 530.

[0043] Specifically, the power sprocket assembly 530 includes a power sprocket 531 and a driven sprocket 532 . The power sprocket 531 and the driven sprocket 532 are arranged opposite to each other. The power sprocket 531 is used to drive the chain to rotate. A clamping wheel 533 is also installed on the chain.

[0044] Reference Figure 1 As shown, specifically, a locking cylinder 110 is fixed on the upper fixed plate 100 , a piston rod of the locking cylinder 110 is connected to a locking cross bar 120 , locking push rods 130 are installed at the bottom of both ends of the locking cross bar 120 , and the lower end of the locking push rod 130 abuts against the top of the column 500 .

[0045] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A double-stroke cutting machine, comprising an upper fixed plate (100), a lower fixed plate (200), a pressing plate (300), and a connecting rod assembly (400), wherein a column (500) is installed between the upper fixed plate (100) and the lower fixed plate (200), the pressing plate (300) is slidably installed between the upper fixed plate (100) and the lower fixed plate (200), and the pressing plate (300) is connected to the upper fixed plate (100) through a connecting rod assembly (400), characterized in that: Also includes: A connecting head (600), the connecting head (600) being connected to the connecting rod assembly (400); A power connecting rod (700), wherein the upper end of the power connecting rod (700) is connected to an eccentric connecting rod (800); An eccentric wheel (900), the eccentric wheel (900) being mounted on the lower section of the power connecting rod (700), and the wheel shaft of the eccentric wheel (900) being rotatably connected to the connecting head (600); A pressing plate moving driving member (1000), wherein the pressing plate moving driving member (1000) is connected to the eccentric connecting rod (800); the pressing plate moving driving member (1000) is used to drive the connecting rod assembly (400) to move in a large stroke so that the pressing plate (300) reaches the minimum mold clamping position; A pressure plate pressurizing driving member (2000), the pressure plate pressurizing driving member (2000) is connected to the wheel shaft of the eccentric wheel (900), and the pressure plate pressurizing driving member (2000) is used to drive the connecting rod assembly (400) to perform a short stroke movement at a position where the mold is about to be closed; The pressing plate moving driving component (1000) and the pressing plate pressurizing driving component (2000) adopt servo motors.

2. A double-stroke cutting machine according to claim 1, characterized in that: The connecting rod assembly (400) comprises a first connecting rod (410), a second connecting rod (420), and a third connecting rod (430); the first connecting rod (410) is rotatably connected to the upper fixing plate (100), the second connecting rod (420) is rotatably connected to the pressing plate (300), and the first connecting rod (410) and the second connecting rod (420) are rotatably connected to each other; One end of the third connecting rod (430) is rotatably connected to the middle portion of the first connecting rod (410), and the other end of the third connecting rod (430) is rotatably connected to the connecting head (600).

3. A double-stroke cutting machine according to claim 2, characterized in that: A first connecting rod seat (450) is fixed to the bottom surface of the upper fixed plate (100), and the first connecting rod seat (450) is rotatably connected to the first connecting rod (410); a second connecting rod seat (460) is fixed to the top surface of the pressure plate (300), and the second connecting rod seat (460) is rotatably connected to the second connecting rod (420).

4. A double-stroke cutting machine according to claim 1, characterized in that: A guide column seat (3000) is fixedly mounted on the pressing plate (300), a guide column (3100) is fixed on the guide column seat (3000), and the guide column (3100) passes through the connecting head (600) and the upper fixing plate (100) in sequence from bottom to top.

5. A double-stroke cutting machine according to claim 1, characterized in that: An auxiliary cylinder (4000) is fixed on the upper fixed plate (100), and a piston rod of the auxiliary cylinder (4000) is connected to the pressing plate (300).

6. A double-stroke cutting machine according to claim 1, characterized in that: The upper section of the column (500) is provided with a threaded rod section, the threaded rod section is threadedly provided with a lifting nut (510), the lifting nut (510) is installed at the corner of the upper fixed plate (100), the upper end of the lifting nut (510) is provided with a lifting sprocket (520), the lifting sprocket (520) is wound with a chain, and the chain is also wound on a power sprocket set (530).

7. A double-stroke cutting machine according to claim 6, characterized in that: The power sprocket assembly (530) comprises a power sprocket (531) and a driven sprocket (532), wherein the power sprocket (531) and the driven sprocket (532) are arranged opposite to each other, and the power sprocket (531) is used to drive the chain to rotate, and a pressure wheel (533) is also arranged on the chain.

8. A double-stroke cutting machine according to claim 6, characterized in that: A mold locking cylinder (110) is fixed on the upper fixed plate (100), a piston rod of the mold locking cylinder (110) is connected to a mold locking cross bar (120), and mold locking push rods (130) are installed at the bottom of both ends of the mold locking cross bar (120), and the lower end of the mold locking push rod (130) is against the top of the column (500).

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