Forming device for plastic buoy production

Abstract

The invention relates to the field of blow molding equipment, in particular to a forming device for plastic float bowl production, and solves the problems that an existing blow molding device is low in production efficiency during puncturing and inconvenient to maintain in the later period. The device comprises a fixing frame, a left mold and a right mold which are matched with each other are movably arranged on the fixing frame, the two molds can move in the left-right direction, a tool bit and a first transmission mechanism used for controlling the tool bit to move are movably arranged on one mold, the first transmission mechanism comprises a toothed plate capable of moving in the front-back direction, and two sets of elastic clamping teeth are arranged on the toothed plate; the two clamping teeth are respectively a clamping tooth A and a clamping tooth B, the clamping tooth A and the clamping tooth B are oppositely arranged front and back and left and right, a first hinge rod is arranged between the toothed plate and the fixing frame, the device further comprises a gear A which is rotationally arranged, the gear A is in transmission connection with the toothed plate, and the tool bit is connected with the gear A; the device can effectively avoid the condition of flatulence and bursting, manual operation is not needed, the whole working process is coherent and high in efficiency, the tool bit is driven to move through mold movement, the structure is simple, and maintenance is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of blow molding equipment, and particularly relates to a molding device for producing plastic floats. Background Art

[0002] At present, the production of plastic floats usually adopts hollow blow molding. Hollow blow molding is a method of blowing a hot melt preform closed in a mold to form a hollow product by means of gas pressure, that is, blowing once and clamping once, which can produce various complex-shaped hollow plastic objects and is a relatively fast-developing plastic molding method; plastic floats are generally large in volume. When plastic particles are heated to a plastic state (tubular plastic preform), they will carry a large amount of hot air, and gas expansion and explosion will occur during blow molding. In actual operation, in order to avoid gas expansion and explosion, before blow molding, workers will manually make a cut to extrude the excess gas without affecting normal production. However, workers need to operate at all times, which is inconvenient and there may be missed operations.

[0003] After retrieval, a Chinese utility model patent with the patent number CN210362422U discloses a blow plastic preform deflation device, which relates to the technical field of blow molding machines. Specifically, it includes a blow molding machine operation platform. On the upper surface of the blow molding machine operation platform, a support backing plate 1 and a support backing plate 2 are fixedly connected in sequence from left to right. On the upper surface of the support backing plate 1, a rear mold frame is fixedly connected. On one side surface of the rear mold frame, a rear template is fixedly connected. On one side surface of the rear template, a rear mold is fixedly connected. On the upper surface of the support backing plate 2, a front mold frame is fixedly connected. On one side surface of the front mold frame, a front template is fixedly connected. On one side surface of the front template, a front mold is fixedly connected. A gas nozzle is arranged between the rear mold and the front mold. When in use, when the preform is blown, the cylinder is started through the controller, and the cylinder pushes the knife-shaped iron sheet to move horizontally. The upper part of the preform is punctured through the knife-shaped iron sheet to achieve rapid deflation, avoiding the need for manual puncturing of the preform with a knife by workers, reducing the labor intensity of workers, and also improving the safety during production.

[0004] The principle of this device is to set a cylinder and a knife-shaped iron sheet on the mold. Although the puncturing can be controlled by the expansion and contraction of the cylinder, generally, the mold needs to stop moving first, then the cylinder is controlled to move, and then the mold is combined. The entire working process is not coherent enough, which will affect production efficiency. And because the deflation position corresponds to the cylinder position, the hot air will also affect the service life of the cylinder and is inconvenient for later maintenance.

[0005] Therefore, the present invention provides a molding device for producing plastic floats to solve the above problems. Summary of the Invention

[0006] In view of the above situation, to overcome the deficiencies of the prior art, the present invention provides a molding device for producing plastic floats to solve the problems of the existing air deflation device for blowing plastic blanks. Although it can control the knife-shaped iron sheet to puncture through the telescopic movement of the cylinder, generally, the mold needs to stop moving first, then the cylinder is controlled to move, and then the mold is merged. The entire working process is not coherent enough, which will affect the production efficiency. Moreover, since the air deflation position corresponds to the position of the cylinder, the hot air will also affect the service life of the cylinder and is inconvenient for later repair.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] A molding device for producing plastic floats includes a fixed frame. There are two left and right matching molds movably arranged on the fixed frame. The two molds can move in the left-right direction. A tool bit is movably arranged on one of the molds, and a first transmission mechanism for controlling the movement of the tool bit is provided. The first transmission mechanism includes a toothed plate that can move in the front-back direction. There are two groups of elastic teeth on the toothed plate, namely tooth A and tooth B. Tooth A and tooth B are arranged opposite to each other in the front-back and left-right directions. A first hinge rod is provided between the toothed plate and the fixed frame. There is also a rotatably arranged gear A, and the gear A is in transmission connection with the toothed plate. The tool bit is connected to the gear A;

[0009] When the two molds approach each other, the corresponding mold drives the toothed plate to move. The toothed plate drives the gear A to rotate forward and backward through tooth A and tooth B, and then drives the tool bit to rotate forward and backward. When the two molds move away from each other, tooth A and tooth B rotate adaptively, and the gear A and the tool bit do not rotate.

[0010] Preferably, the tool bit is arranged at the front end of the left mold. The toothed plate is in a "U" shape. Tooth A is arranged at the left front side and can rotate clockwise. Tooth B is arranged at the right rear side and can rotate counterclockwise. The first hinge rod is inclined to the right from front to back;

[0011] When the two molds approach each other, the toothed plate moves forward. First, it drives the gear A to rotate counterclockwise through tooth A, and then drives the gear A to rotate clockwise through tooth B. The tool bit first rotates counterclockwise and then clockwise.

[0012] Preferably, a gear B and a gear C are coaxially rotatably arranged on the mold. The gear B can be meshed with tooth A or tooth B. A chain is provided between the gear C and the gear A.

[0013] Preferably, a second transmission mechanism is provided between the gear A and the cutter head. The second transmission mechanism includes a connecting plate A coaxially connected to the gear A. The connecting plate A is connected to a connecting plate B through an elastic telescopic member A. The cutter head is fixedly arranged on the connecting plate B. The connecting plate A and the connecting plate B are respectively connected with second hinge rods. The two second hinge rods are commonly connected with a top block. The distance between the connecting plate A and the connecting plate B is controlled by the movement of the top block. A blocking mechanism adapted to the top block is further included. The blocking mechanism includes a fixing plate relatively fixed to the mold. The fixing plate is connected with a top plate through an elastic telescopic member B;

[0014] When the two molds approach each other, the connecting plate A rotates with the gear A. The top block contacts the top plate, causing the connecting plate B to move away from the connecting plate A first.

[0015] Preferably, both the elastic telescopic member A and the elastic telescopic member B include a spring and a telescopic rod.

[0016] Preferably, rollers are provided on the side of the top block corresponding to the top plate.

[0017] Preferably, the fixing frame includes a bottom plate and side plates on the left and right sides of the bottom plate. The side plates are connected to the mold through cylinders.

[0018] Preferably, both the engaging teeth A and the engaging teeth B are connected to the tooth plate through a rotating shaft and a spring. The rotating shaft rotates within a certain range.

[0019] Preferably, the first transmission mechanism further includes a chute arranged on the mold in the front-back direction. The tooth plate is slidably arranged on the chute.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. When the two molds approach each other in the present invention, the corresponding mold drives the tooth plate to move. Then, the tooth plate drives the gear A to rotate forward and backward through the engaging teeth A and the engaging teeth B, and further drives the cutter head to rotate forward and backward. First, the cutter head can rotate forward to approach the plastic tubular preform in a plastic state, puncture it, and release the excess hot air carried inside. Then, the two molds continue to approach each other. By reversing the cutter head, the cutter head is moved away from the plastic tubular preform in a plastic state, enabling the two molds to cooperate smoothly and perform blow molding. The present invention can effectively avoid the situation of bloating and bursting, without manual operation, and the entire working process is coherent and efficient. The present invention drives the cutter head to move through the movement of the mold, without setting cylinders and controllers, and the overall structure is simple, facilitating later maintenance.

[0022] 2. After blow molding is completed in the present invention, when the two molds move away from each other, the engaging teeth A and the engaging teeth B rotate adaptively, and the gear A and the cutter head do not rotate. The cutter head will not affect or block the formed floating cylinder, facilitating the smooth removal of the formed floating cylinder. Description of the Drawings

[0023] Figure 1 is the overall structural schematic diagram of the present invention;

[0024] Figure 2 is Figure 1 the enlarged schematic diagram at position A in

[0025] Figure 3 is Figure 1 the enlarged schematic diagram at position B in

[0026] Figure 4 is the schematic diagram when the first articulated rod drives the gear B to rotate counterclockwise in the present invention;

[0027] Figure 5 is the schematic diagram when the first articulated rod drives the gear B to rotate clockwise in the present invention;

[0028] Figure 6 is the schematic diagram of the engaging teeth A and engaging teeth B in the natural state in the present invention;

[0029] Figure 7 is the schematic diagram of the engaging teeth A and engaging teeth B during adaptive rotation in the present invention;

[0030] Figure 8 is the transmission principle diagram of the second transmission mechanism and the blocking mechanism in the present invention;

[0031] Figure 9 is the schematic diagram of the roller in the present invention.

[0032] In the figure: 1. fixed frame, 101. bottom plate, 102. side plate, 2. air cylinder, 3. mold, 5. cutter head, 6. first transmission mechanism, 601. first articulated rod, 602. toothed plate, 603. engaging tooth B, 604. engaging tooth A, 605. gear B, 606. gear C, 607. chain, 608. chute, 609. gear A, 7. second transmission mechanism, 701. connecting plate A, 702. top block, 703. second articulated rod, 704. elastic telescopic member A, 705. connecting plate B, 706. roller, 8. blocking mechanism, 801. fixing plate, 802. elastic telescopic member B, 803. top plate. Detailed implementation manners

[0033] Next, each embodiment of the present invention will be described in detail with reference to the attached Figures 1 to 9 Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present invention and are not intended to limit the protection scope of the present invention.

[0034] A molding device for producing plastic floating barrels, as shown in the attached Figure 1As shown in the figure, it includes a fixing frame 1. Specifically, the fixing frame 1 includes a bottom plate 101 and side plates 102 on both the left and right sides of the bottom plate 101. There are two left and right matching molds 3 movably arranged on the fixing frame 1, and the two molds 3 can move in the left-right direction. Specifically, the side plates 102 are connected to the molds 3 through cylinders 2 to control the left-right movement of the two molds 3. In specific use, it is combined with a heating machine and a pneumatic press to form the entire blow molding equipment to achieve blow molding. This part is prior art and will not be elaborated here.

[0035] As shown in the attached Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 As shown in the figure, a cutter head 5 is movably arranged on one of the molds 3, and a first transmission mechanism 6 for controlling the movement of the cutter head 5 is provided. The first transmission mechanism 6 includes a toothed plate 602 that can move in the front-back direction. Specifically, there is a chute 608 on the mold 3 in the front-back direction, and the toothed plate 602 is slidably arranged on the chute 608. There are two groups of elastic teeth on the toothed plate 602, namely tooth A 604 and tooth B 603. Tooth A 604 and tooth B 603 are arranged relatively front-back and left-right. Specifically, both tooth A 604 and tooth B 603 are connected to the toothed plate 602 through a rotating shaft and a spring, and the rotating shaft rotates within a certain range. A first hinge rod 601 is provided between the toothed plate 602 and the side plate 102 of the fixing frame 1. The first hinge rod 601 is hinged to the side plate 102 and the toothed plate 602 respectively. It also includes a rotatably arranged gear A 609. The gear A 609 is in transmission connection with the toothed plate 602, and the cutter head 5 is connected to the gear A 609.

[0036] Working principle: When the mold 3 moves, the distance between the mold 3 and the side plate 102 changes, and the angle of the first hinge rod 601 changes, thereby driving the toothed plate 602 to move in the front-back direction. The movement of the toothed plate 602 drives the movement of tooth A 604 and tooth B 603, so that tooth A 604 and tooth B 603 are successively in transmission with the gear A 609, driving the gear A 609 to rotate forward and backward.

[0037] During specific operation, when the two molds 3 approach each other, the corresponding mold 3 drives the toothed plate 602 to move. The toothed plate 602 drives the gear A609 to rotate forward and backward through the engaging teeth A604 and the engaging teeth B603, and then drives the cutter head 5 to rotate forward and backward. By rotating the cutter head 5 forward, the cutter head 5 can approach the plastic tubular parison and puncture it, thereby automatically controlling the release of the excess hot air carried inside without manual operation. By rotating the cutter head 5 backward, the cutter head 5 is moved away from the plastic tubular parison, enabling the two molds 3 to cooperate smoothly and perform blow molding. When the two molds 3 move away from each other, the engaging teeth A604 and the engaging teeth B603 rotate adaptively, and the gear A609 and the cutter head 5 do not rotate, so that the cutter head 5 will not affect or block the formed buoy, and the formed buoy can be taken out smoothly; the overall operation of the present invention is coherent and efficient. By driving the cutter head to move through the movement of the mold 3, there is no need to set up a cylinder and a controller, and the overall structure is simple, which is convenient for later maintenance.

[0038] As shown in the attached Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 In the present embodiment, the cutter head 5 is arranged at the front end of the left mold 3. The toothed plate 602 is in a "U" shape. The engaging teeth A604 are arranged on the left front side and can rotate clockwise. The engaging teeth B603 are arranged on the right rear side and can rotate counterclockwise. The first hinge rod 601 is inclined to the right from front to back, that is, the left front end of the first hinge rod 601 is hinged to the left side plate 102, and the right rear end is hinged to the toothed plate 602.

[0039] During specific operation, when the two molds 3 approach each other, the toothed plate 602 moves forward. First, it drives the gear A609 to rotate counterclockwise through the engaging teeth A604, and then drives the gear A609 to rotate clockwise through the engaging teeth B603. The specific state can be referred to the attached Figure 4 , Figure 5 , so as to drive the cutter head 5 to rotate counterclockwise for puncturing first and then rotate clockwise for resetting.

[0040] As shown in the attached Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 In the present embodiment, a gear B605 and a gear C606 are coaxially rotatably arranged on the mold 3. The gear B605 can be meshed with the engaging teeth A604 or the engaging teeth B603. A chain 607 is arranged between the gear C606 and the gear A609. In the present embodiment, the engaging teeth A604 and the engaging teeth B603 are in the natural state as shown in the attached Figure 6As shown, when the toothed plate 602 moves forward, it drives the gear A609 to rotate through two sets of teeth, gear B605, gear C606, and chain 607. When resetting, the adaptive rotation states of the tooth A604 and tooth B603 are as shown in the appendix Figure 7 As shown, when the toothed plate 602 moves backward, the tooth B603 rotates counterclockwise and the tooth A604 rotates clockwise, so that the gear B605 does not rotate and the tool head 5 does not rotate. In addition, it should be noted that a certain damping should be provided at the gear B605 to prevent the gear B605 from rotating self-rotation.

[0041] In this embodiment, the transmission between the toothed plate 602 and the gear A609 is realized by setting the gear B605, gear C606, and chain 607. During specific operation, the toothed plate 602 can always be located above the mold 3, and no long part will protrude outside the mold 3, which can save space.

[0042] As shown in the appendix Figure 1 、 Figure 3 、 Figure 8 As shown, in this embodiment, a second transmission mechanism 7 is provided between the gear A609 and the tool head 5. The second transmission mechanism 7 includes a connecting plate A701 coaxially connected to the gear A609. The connecting plate A701 is connected to a connecting plate B705 through an elastic telescopic member A704. Specifically, the elastic telescopic member A704 includes a spring and a telescopic rod. The tool head 5 is fixedly arranged on the connecting plate B705. The connecting plate A701 and the connecting plate B705 are respectively connected with a second hinge rod 703. The two second hinge rods 703 are commonly connected with a top block 702. The distance between the connecting plate A701 and the connecting plate B705 is controlled by the movement of the top block 702. It also includes a blocking mechanism 8 adapted to the top block 702. The blocking mechanism 8 includes a fixing plate 801 relatively fixed to the mold 3. The fixing plate 801 is connected to a top plate 803 through an elastic telescopic member B802. Specifically, the elastic telescopic member B802 includes a spring and a telescopic rod.

[0043] Working principle: When the top block 702 is not subject to external force, the connecting plate A701 and the connecting plate B705 are relatively close to each other under the action of the elastic telescopic member A704. When the top block 702 is subject to external force and approaches the elastic telescopic member A704, under the action of the second hinge rod 703, it will overcome the action of the elastic telescopic member A704, causing the connecting plate A701 and the connecting plate B705 to move away from each other. When the connecting plate A701 and the connecting plate B705 rotate to the contact between the top block 702 and the fixing plate 801 at the same time, the connecting plate A701 and the connecting plate B705 will move away from each other first.

[0044] During specific operation, when the two molds 3 approach each other, the connecting plate A701 rotates counterclockwise with the gear A609. The top block 702 contacts the top plate 803, causing the connecting plate B705 to move away from the connecting plate A701 first, that is, driving the cutter head 5 to extend and extend to the maximum distance. Subsequently, the top plate 803 is pushed to overcome the elastic telescopic member B802, enabling the cutter head 5 to successfully pierce. In this embodiment, when the device is not in operation, the cutter head 5 can be partially retracted by the contraction of the elastic telescopic member A704, reducing space occupation and improving safety.

[0045] As shown in the Figure 9 attachment, in this embodiment, a roller 706 is provided on the corresponding side of the top block 702 relative to the top plate 803, which is used to reduce the friction force when the top block 702 and the top plate 803 move relative to each other.

[0046] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0047] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0048] So far, the technical solutions of the present invention have been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims

1. A molding device for producing plastic floats, comprising a fixing frame (1), on which there are two left and right matching molds (3) movably arranged, and the two molds (3) can move in the left and right directions, characterized in that, One of the molds (3) is movably provided with a cutter head (5), and a first transmission mechanism (6) for controlling the movement of the cutter head (5) is provided. The first transmission mechanism (6) includes a toothed plate (602) that can move in the front-back direction. Two groups of elastic teeth are provided on the toothed plate (602), namely tooth A (604) and tooth B (603). Tooth A (604) and tooth B (603) are arranged relative to the front-back and left-right directions. A first hinge rod (601) is provided between the toothed plate (602) and the fixed frame (1). It also includes a rotatably arranged gear A (609). The gear A (609) is in transmission connection with the toothed plate (602), and the cutter head (5) is connected to the gear A (609); When the two molds (3) approach each other, the corresponding mold (3) drives the toothed plate (602) to move. The toothed plate (602) drives the gear A (609) to rotate forward and backward through tooth A (604) and tooth B (603), and then drives the cutter head (5) to rotate forward and backward. When the two molds (3) move away from each other, tooth A (604) and tooth B (603) rotate adaptively, and the gear A (609) and the cutter head (5) do not rotate.

2. The molding device for producing plastic floats according to claim 1, characterized in that, The cutter head (5) is arranged at the front end of the left mold (3). The toothed plate (602) is in a "U" shape. Tooth A (604) is arranged on the left front side and can rotate clockwise. Tooth B (603) is arranged on the right rear side and can rotate counterclockwise. The first hinge rod (601) is inclined to the right from front to back; When the two molds (3) approach each other, the toothed plate (602) moves forward. First, it drives the gear A (609) to rotate counterclockwise through tooth A (604), and then drives the gear A (609) to rotate clockwise through tooth B (603). The cutter head (5) first rotates counterclockwise and then clockwise.

3. The molding device for producing plastic floats according to claim 2, characterized in that, A gear B (605) and a gear C (606) are coaxially rotatably arranged on the mold (3). The gear B (605) can be meshed and connected with tooth A (604) or tooth B (603). A chain (607) is provided between the gear C (606) and the gear A (609).

4. A molding device for producing plastic buoys according to claim 1, characterized in that: A second transmission mechanism (7) is provided between the gear A (609) and the cutter head (5). The second transmission mechanism (7) includes a connecting plate A (701) coaxially connected to the gear A (609). The connecting plate A (701) is connected to a connecting plate B (705) through an elastic telescopic member A (704). The cutter head (5) is fixedly arranged on the connecting plate B (705). The connecting plate A (701) and the connecting plate B (705) are respectively connected with a second hinge rod (703). The two second hinge rods (703) are commonly connected with a top block (702). The distance between the connecting plate A (701) and the connecting plate B (705) is controlled by the movement of the top block (702). It also includes a blocking mechanism (8) adapted to the top block (702). The blocking mechanism (8) includes a fixing plate (801) relatively fixed to the mold (3). The fixing plate (801) is connected to a top plate (803) through an elastic telescopic member B (802); When the two molds (3) approach each other, the connecting plate A (701) rotates with the gear A (609), and the top block (702) contacts the top plate (803), causing the connecting plate B (705) to move away from the connecting plate A (701) first.

5. The molding device for producing plastic floats according to claim 4, characterized in that, The elastic telescopic member A (704) and the elastic telescopic member B (802) both include a spring and a telescopic rod.

6. A molding device for producing plastic buoys according to claim 4, characterized in that: A roller (706) is provided on the side of the top block (702) corresponding to the top plate (803).

7. A molding device for producing plastic buoys according to any one of claims 1 to 6, characterized in that: The fixing frame (1) includes a bottom plate (101) and side plates (102) on the left and right sides of the bottom plate (101), and the side plates (102) are connected to the mold (3) through a cylinder (2).

8. A molding device for producing plastic floats according to any one of claims 1-6, characterized in that, The engaging teeth A (604) and the engaging teeth B (603) are both connected to the toothed plate (602) through a rotating shaft and a spring, and the rotating shaft rotates within a certain range.

9. A molding device for producing plastic floats according to any one of claims 1-6, characterized in that, The first transmission mechanism (6) further includes a chute (608) arranged on the mold (3) in the front-rear direction, and the toothed plate (602) is slidably arranged on the chute (608).

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