Automatic injection mechanism for EVA (Ethylene Vinyl Acetate) foam forming machine

Abstract

The utility model relates to an automatic injection mechanism for an EVA (Ethylene-Vinyl Acetate) foaming forming machine, which belongs to the technical field of EVA foaming forming machines and comprises a box body, an anti-blocking pressurizing assembly for conveying EVA materials is arranged at the top of the inner bottom wall of the box body, a belt wheel assembly for transmitting power is arranged at the top of the anti-blocking pressurizing assembly, a feeding hopper is fixed at the top of the box body, and the feeding hopper is fixed at the bottom of the box body. A pushing assembly for pushing EVA materials is arranged at the bottom of the feeding hopper, and a driving mechanism for providing power is arranged in an inner cavity of the box body. According to the automatic injection mechanism used on the EVA foaming forming machine, through cooperation of the anti-blocking pressurizing assembly and the pushing assembly, an EVA material can be extruded out, opening and closing of an electromagnetic valve and the rotating speed of a servo motor are controlled through a controller, and therefore automatic injection is achieved, only enough EVA foaming materials need to be added into the funnel, and the automatic injection mechanism is simple in structure, convenient to use and high in practicability. The production efficiency of the EVA sole can be greatly improved through automatic injection, and the labor cost can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of EVA foaming molding machines, in particular to an automatic injection mechanism used on an EVA foaming molding machine. Background Art

[0002] EVA foam molding machine is mainly used for foam molding of EVA (ethylene-vinyl acetate copolymer) materials. Through a specific process, the machine heats, mixes, and injects EVA raw materials into the mold, and foams and molds them inside the mold. The EVA foam molding automatic injection mechanism is one of the core components of the EVA foam molding machine, ensuring the efficiency, stability and reliability of the EVA foam molding process. With the continuous development of science and technology, the EVA foam molding automatic injection mechanism will become more intelligent, automated and environmentally friendly in the future, providing more powerful support for the development of related industries.

[0003] For example, a Chinese patent (publication number: CN208826931U) discloses a feeding device of an EVA secondary molding machine, comprising a box body, a molding machine body, a baffle plate and a hopper, a storage barrel is provided inside the box body, and a molding machine body is provided on the left side of the box body, a support frame is provided outside the molding machine body, and a hopper is fixed to the upper end of the support frame, a discharge pipe is provided below the hopper, and a vibration motor is installed on the left side below the hopper, an extrusion cylinder is fixed to the right side below the hopper through a support, a pressing cylinder is fixed to the right side of the horizontal feeding barrel, and the left side of the horizontal feeding barrel corresponds to the feeding port of the molding machine body. The feeding device of the EVA secondary molding machine adopts a cylinder to drive the baffle plate to move under the hopper to control the addition of material, and there will be no problem of serious waste of uneven filler. It has high efficiency and low energy consumption, can better carry out the feeding work of the molding machine, and promote the development of the feeding machine industry.

[0004] When using the feeding device of the EVA secondary molding machine, EVA particles are first placed into the storage barrel, the feeding pump is operated to input the material into the hopper through the pipeline, the baffle plate cylinder is operated to push the baffle plate through the cylinder push rod, and the EVA particles inside the hopper are dropped into the collecting hopper through the discharge pipe, and the vibration motor arranged on the side of the hopper can effectively prevent the material inside the hopper from being blocked, and the extrusion cylinder is operated to push the EVA particles inside the collecting hopper into the horizontal feeding barrel through the pushing plate. However, the device cannot be automatically injected and requires manual operation, which is not convenient enough. Therefore, an automatic injection mechanism for an EVA foam molding machine is proposed to solve the above problem. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an automatic injection mechanism for an EVA foam molding machine, which has the advantages of being able to automatically inject, and solves the problem of insufficient automation affecting efficiency.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an automatic injection mechanism for an EVA foam molding machine, comprising a box body, an anti-blocking pressurizing assembly for transmitting EVA material is provided on the top of the bottom wall of the box body, a pulley assembly for transmitting power is provided on the top of the anti-blocking pressurizing assembly, a feeding funnel is fixed on the top of the box body, a pushing assembly for pushing the EVA material is provided at the bottom of the feeding funnel, and a driving mechanism for providing power is provided in the inner cavity of the box body;

[0007] The pushing assembly includes a support frame fixed to the inner bottom wall of the box body, a fixed block is fixed on the top of the support frame, a horizontal material conveying pipe is fixed on the top of the fixed block, and an injection part that can reciprocately push the EVA material is provided inside the horizontal material conveying pipe.

[0008] Furthermore, the anti-blocking pressurizing assembly includes a vertical material delivery pipe fixed to the inner bottom wall of the box body, the top of the vertical material delivery pipe is rotatably connected to a driven rod through a bearing, and a spiral feeding rod is fixed to the bottom of the driven rod.

[0009] Furthermore, a discharge hole is opened at the bottom of the box body, the outer wall of the vertical conveying pipe is fixed to the inner wall of the discharge hole, the driven rod passes through the top wall of the vertical conveying pipe, and the end of the driven rod away from the vertical conveying pipe is rotatably connected to the inner top wall of the box body through a bearing.

[0010] Furthermore, the driving mechanism includes a servo motor fixed to the top wall of the box body, an active rod is fixed to the output shaft of the servo motor, a cam is fixed to the outer surface of the active rod, and a controller is fixed to the outer surface of the servo motor.

[0011] Furthermore, the pulley assembly consists of a driven wheel, a driving wheel and a transmission belt. The driven wheel is fixed to the outer surface of the driven rod, and the driving wheel is fixed to the outer surface of the driving rod. Power is transmitted between the driving wheel and the driven wheel through the transmission belt.

[0012] Furthermore, the output shaft of the servo motor passes through the top wall of the box body, and a limit plate is fixed on the outer surface of the active rod and at the bottom of the cam.

[0013] Furthermore, the injection part includes a piston movably connected to the inner side of the horizontal feed pipe, a push rod is fixed on the right side of the piston, a spring is fixed on the right side of the piston and on the outside of the push rod, the side of the spring away from the piston is fixed to the horizontal feed pipe, the push rod passes through the outside of the right side wall of the horizontal feed pipe, and a baffle is fixed on the right side of the push rod and outside the horizontal feed pipe.

[0014] Furthermore, the horizontal material conveying pipe is fixedly connected to the vertical material conveying pipe, the top of the horizontal material conveying pipe is fixedly connected to the funnel, the right side of the baffle is in contact with the cam, the bottom of the funnel is fixed with a solenoid valve, the front of the box is hinged with a movable door through a hinge, and an observation window is embedded in the movable door. The front of the box is hinged with a movable door through a hinge, and an observation window is embedded in the movable door.

[0015] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0016] The automatic injection mechanism used in the EVA foam molding machine can promote the extrusion of EVA material by cooperating with the anti-blocking pressurizing component and the pushing component, and realizes automatic injection by controlling the opening and closing of the solenoid valve and the rotation speed of the servo motor through the controller. Only a sufficient amount of EVA foaming material needs to be added to the funnel. The automatic injection can greatly improve the production efficiency of EVA soles and save labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is the appearance diagram of the utility model;

[0019] Figure 3 This is a three-dimensional appearance diagram of the cam of the utility model;

[0020] Figure 4 This is the appearance diagram of the injection part of the utility model;

[0021] In the figure: 1 box body, 2 anti-blocking pressurizing assembly, 201 vertical feeding pipe, 202 spiral feeding rod, 203 driven rod, 3 pulley assembly, 301 driven wheel, 302 driving wheel, 303 conveyor belt, 4 funnel, 5 pushing assembly, 501 horizontal feeding pipe, 502 support frame, 503 injection part, 5031 piston, 5032 push rod, 5033 spring, 5034 baffle, 6 driving mechanism, 601 servo motor, 602 controller, 603 active rod, 604 cam, 7 movable door. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figures 1 to 2In this embodiment, an automatic injection mechanism for an EVA foam molding machine includes a box body 1. The top of the bottom wall of the box body 1 is provided with an anti-blocking pressurizing component 2 for transmitting EVA material, and the top of the anti-blocking pressurizing component 2 is provided with a pulley component 3 for transmitting power. A feeding funnel 4 is fixed to the top of the box body 1, and a pushing component 5 for pushing the EVA material is provided at the bottom of the feeding funnel 4. The inner cavity of the box body 1 is provided with a driving mechanism 6 for providing power. A movable door 7 is hinged on the front of the box body 1 through a hinge, and an observation window is embedded in the movable door 7. The front of the box body 1 is hinged with a movable door 7 through a hinge, and an observation window is embedded in the movable door 7.

[0024] In addition, the anti-blocking pressurizing component 2 includes a vertical conveying pipe 201 fixed to the inner bottom wall of the box body 1. The top of the vertical conveying pipe 201 is rotatably connected to a driven rod 203 through a bearing. The bottom of the driven rod 203 is fixed with a spiral feeding rod 202. A discharge hole is opened at the bottom of the box body 1. The outer wall of the vertical conveying pipe 201 is fixed to the inner wall of the discharge hole. The driven rod 203 penetrates into the top wall of the vertical conveying pipe 201. The end of the driven rod 203 away from the vertical conveying pipe 201 is rotatably connected to the inner top wall of the box body 1 through a bearing. The provision of the spiral feeding rod 202 can ensure the uniformity of feeding. At the same time, when a blockage occurs, the spiral feeding rod 202 will push the blockage to move downward, thereby solving the blockage problem.

[0025] It should be noted that the pulley assembly 3 is composed of a driven pulley 301, a driving pulley 302 and a conveyor belt 303. The driven pulley 301 is fixed to the outer surface of the driven rod 203, and the driving pulley 302 is fixed to the outer surface of the active rod 603. Power is transmitted between the driving pulley 302 and the driven pulley 301 through the conveyor belt 303. The pulley assembly 3 can synchronously transmit the power of the driving mechanism 6 to the anti-blocking pressurization assembly 2, thereby improving the injection efficiency.

[0026] In this embodiment, the anti-blocking pressurizing component 2 cooperates with the pushing component 5 to continuously push the raw materials to the discharge port, and the synchronous movement of the anti-blocking pressurizing component 2 and the pushing component 5 is achieved through the pulley component 3, and finally cooperates with the driving mechanism 6 to realize automatic injection.

[0027] Please refer again Figure 1 and Figures 3 to 4 In order to achieve automatic injection smoothly, the pushing component 5 in this embodiment includes a support frame 502 fixed to the inner bottom wall of the box body 1, a fixed block is fixed on the top of the support frame 502, a horizontal feed pipe 501 is fixed on the top of the fixed block, and the interior of the horizontal feed pipe 501 is provided with an injection part 503 that can push the EVA material back and forth.

[0028] In addition, the injection part 503 includes a piston 5031 movably connected to the inner side of the horizontal feed pipe 501, a push rod 5032 is fixed to the right side of the piston 5031, a spring 5033 is fixed to the right side of the piston 5031 and on the outside of the push rod 5032, the side of the spring 5033 away from the piston 5031 is fixed to the horizontal feed pipe 501, the push rod 5032 passes through to the outside of the right side wall of the horizontal feed pipe 501, a baffle 5034 is fixed to the right side of the push rod 5032 and on the outside of the horizontal feed pipe 501, the spring 5033 can make the pushed out piston 5031 quickly restore, so as to facilitate the next material discharge of the solenoid valve, and the baffle 5034 can transmit the power of the cam 604.

[0029] It can be known that the driving mechanism 6 includes a servo motor 601 fixed to the top wall of the box body 1, the output shaft of the servo motor 601 is fixed with an active rod 603, the outer surface of the active rod 603 is fixed with a cam 604, the outer surface of the servo motor 601 is fixed with a controller 602, the output shaft of the servo motor 601 passes through the top wall of the box body 1, the outer surface of the active rod 603 and the bottom of the cam 604 are fixed with a limit plate, the horizontal conveying pipe 501 is fixedly connected to the vertical conveying pipe 201, the top of the horizontal conveying pipe 501 is fixedly connected to the funnel 4, the right side of the baffle 5034 is in contact with the cam 604, and the bottom of the funnel 4 is fixed with an electromagnetic valve. The communication relationship between the horizontal conveying pipe 501 and the vertical conveying pipe 201 can achieve rapid material delivery.

[0030] In this embodiment, the reciprocating motion of the piston 5031 is achieved through the cooperation of the driving mechanism 6 and the pushing assembly 5, which further promotes the smooth implementation of the automatic injection. Finally, the automatic injection is achieved through the cooperation of the controller 602 and the solenoid valve.

[0031] It can be understood that the synchronous transmission of power is achieved through the cooperation of the drive mechanism 6 and the pulley assembly 3, which enables the anti-blocking pressurizing assembly 2 and the pushing assembly 5 to run synchronously and continuously. Finally, efficient automatic injection is achieved through the drive mechanism 6, which can improve production efficiency and reduce labor costs.

[0032] The electrical components appearing in the text are all electrically connected to the controller and the power supply. The control method of the present invention is controlled by the controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. In addition, the present invention is mainly used to protect mechanical devices, so the control method and circuit connection are no longer explained in detail in the present invention.

[0033] The working principle of the above embodiment is:

[0034] Put the EVA foam material into the funnel 4 and start the servo motor 601. At this time, the controller 602 will control the speed of the servo motor 601 and control the solenoid valve. The solenoid valve opens to allow the EVA material to enter the horizontal feeding pipe 501. When the EVA material in the horizontal feeding pipe 501 accumulates to a certain level, the solenoid valve is closed, and the servo motor 601 drives the cam 604 to rotate. During the rotation of the cam 604, the baffle 5034 is pushed, prompting the baffle 5034 to push the push rod 5032, thereby prompting the piston 5031 to move to the left. At the same time, the pulley assembly 3 transmits the motor power to the spiral feeding rod 202, prompting the spiral feeding rod 202 to rotate. At this time, the EVA material pushed by the piston 5031 will be conveyed to the bottom by the spiral feeding rod 202 and output from the discharge port. The cooperation of the spring 5033 and the cam 604 prompts the piston 5031 to reciprocate. The opening and closing of the solenoid valve is controlled by the controller 602 to realize automatic feeding. This method does not require manual continuous loading, can save labor costs, improve production efficiency, and has a long service life.

[0035] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0036] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. An automatic injection mechanism for an EVA foam molding machine, comprising a box (1), characterized in that: The top of the inner bottom wall of the box body (1) is provided with an anti-blocking pressurizing component (2) for transmitting EVA material, the top of the anti-blocking pressurizing component (2) is provided with a pulley component (3) for transmitting power, a feeding funnel (4) is fixed to the top of the box body (1), the bottom of the feeding funnel (4) is provided with a pushing component (5) for pushing the EVA material, and the inner cavity of the box body (1) is provided with a driving mechanism (6) for providing power; The pushing assembly (5) comprises a support frame (502) fixed to the inner bottom wall of the box body (1), a fixing block is fixed to the top of the support frame (502), a horizontal material delivery pipe (501) is fixed to the top of the fixing block, and an injection portion (503) capable of reciprocatingly pushing the EVA material is provided inside the horizontal material delivery pipe (501).

2. The automatic injection mechanism for an EVA foam molding machine according to claim 1, characterized in that: The anti-blocking pressurizing assembly (2) comprises a vertical conveying pipe (201) fixed to the inner bottom wall of the box body (1); the top of the vertical conveying pipe (201) is rotatably connected to a driven rod (203) via a bearing; and the bottom of the driven rod (203) is fixed to a spiral feeding rod (202).

3. The automatic injection mechanism for an EVA foam molding machine according to claim 2, characterized in that: A discharge hole is provided at the bottom of the box body (1), the outer wall of the vertical conveying pipe (201) is fixed to the inner wall of the discharge hole, the driven rod (203) penetrates into the top wall of the vertical conveying pipe (201), and the end of the driven rod (203) away from the vertical conveying pipe (201) is rotatably connected to the inner top wall of the box body (1) through a bearing.

4. The automatic injection mechanism for an EVA foam molding machine according to claim 3, characterized in that: The driving mechanism (6) comprises a servo motor (601) fixed to the top wall of the box body (1), an active rod (603) being fixed to the output shaft of the servo motor (601), a cam (604) being fixed to the outer surface of the active rod (603), and a controller (602) being fixed to the outer surface of the servo motor (601).

5. The automatic injection mechanism for an EVA foam molding machine according to claim 4, characterized in that: The pulley assembly (3) consists of a driven wheel (301), a driving wheel (302) and a conveyor belt (303); the driven wheel (301) is fixed to the outer surface of the driven rod (203); the driving wheel (302) is fixed to the outer surface of the driving rod (603); and power is transmitted between the driving wheel (302) and the driven wheel (301) via the conveyor belt (303).

6. The automatic injection mechanism for an EVA foam molding machine according to claim 5, characterized in that: The output shaft of the servo motor (601) passes through the top wall of the box body (1), and a limit plate is fixed on the outer surface of the active rod (603) and at the bottom of the cam (604).

7. The automatic injection mechanism for an EVA foam molding machine according to claim 6, characterized in that: The injection portion (503) includes a piston (5031) movably connected to the inner side of the horizontal feed pipe (501), a push rod (5032) is fixed to the right side of the piston (5031), a spring (5033) is fixed to the right side of the piston (5031) and located outside the push rod (5032), and the side of the spring (5033) away from the piston (5031) is fixed to the horizontal feed pipe (501), the push rod (5032) penetrates to the outside of the right side wall of the horizontal feed pipe (501), and a baffle (5034) is fixed to the right side of the push rod (5032) and located outside the horizontal feed pipe (501).

8. The automatic injection mechanism for an EVA foam molding machine according to claim 7, characterized in that: The horizontal material delivery pipe (501) is fixedly connected to the vertical material delivery pipe (201), the top of the horizontal material delivery pipe (501) is fixedly connected to the funnel (4), the right side of the baffle (5034) is in contact with the cam (604), and a solenoid valve is fixed to the bottom of the funnel (4). The front of the box body (1) is hinged with a movable door (7) through a hinge, and an observation window is embedded in the movable door (7). The front of the box body (1) is hinged with a movable door (7) through a hinge, and an observation window is embedded in the movable door (7).

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