Feeding device of rubber injection molding machine

Abstract

A feeding device of a rubber injection molding machine relates to the field of rubber injection molding equipment and comprises an injection gun, a feeding channel, a feeding mechanism and an electric control mechanism, and an accommodating cavity and a spiral conveying rod arranged in the accommodating cavity are formed in one inward side of the injection gun in a penetrating manner; the feeding channel is connected with the containing cavity and comprises an upper feeding plate and a lower feeding plate which are oppositely arranged up and down, and a rubber material penetrates through the space between the upper feeding plate and the lower feeding plate; the feeding mechanism is arranged in the feeding channel and conveys rubber materials into the shooting gun. The electric control mechanism comprises a first grating set, a second grating set and a controller. The first grating set and the second grating set are arranged at the front end and the rear end of the feeding channel correspondingly to detect the state of rubber materials. And the controller is connected with the feeding mechanism and controls the feeding mechanism to start or stop according to signals fed back by the first grating group and the second grating group. And the injection molding effect can be effectively prevented from being influenced by the difference between the feeding speed and the discharging speed.

Description

Technical Field

[0001] This utility model belongs to the field of rubber injection molding equipment, specifically a feeding device for a rubber injection molding machine. Background Technology

[0002] Rubber injection molding refers to a manufacturing method in which rubber compound is heated through an injection molding machine and then injected under pressure into a sealed mold, where it is vulcanized under pressure to form a finished product. In traditional injection molding, a mismatch between the feed rate and the injection / ejection rate is common. If the feed rate is greater than the ejection rate, the material is easily torn, causing discontinuous injection and resulting in product quality issues. Conversely, if the feed rate is less than the ejection rate, material tends to accumulate, causing overflow and waste. These methods require improvement. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a feeding device for a rubber injection molding machine.

[0004] The present invention adopts the following technical solution:

[0005] A feeding device for a rubber injection molding machine includes an injection gun, a feeding channel, a feeding mechanism, and an electrical control mechanism. The injection gun has a cavity formed extending to one side, and a spiral conveying rod disposed within the cavity. The feeding channel is connected to the cavity and includes an upper feeding plate and a lower feeding plate arranged opposite each other, through which rubber material passes. The feeding mechanism is disposed in the feeding channel to transport the rubber material to the injection gun. The electrical control mechanism includes a first grating group, a second grating group, and a controller. The first and second grating groups are respectively disposed at the front and rear ends of the feeding channel to detect the state of the rubber material. The controller is connected to the feeding mechanism and controls the feeding mechanism to start or stop based on signals fed back from the first and second grating groups.

[0006] Preferably, the feeding mechanism includes a feeding roller, a conveying roller, a reducer, and a feeding motor. The feeding roller is horizontally arranged in the feeding channel, and its axis is perpendicular to the conveying direction of the rubber material. Two conveying rollers are arranged vertically in the feeding channel and symmetrically clamped on both sides of the rubber material. The reducer is connected to the conveying roller. The feeding motor is connected to the reducer to drive the conveying roller to rotate and convey the rubber material forward.

[0007] Preferably, the device further includes a synchronous gear set disposed between the reducer and the conveying roller. The synchronous gear set includes a drive gear and a driven gear. One end of the drive gear is connected to a conveying roller, and the other end is connected to the reducer. The driven gear is connected to another conveying roller and meshes with the drive gear.

[0008] Preferably, it also includes anti-scratch rollers arranged vertically on both sides of the feeding roller.

[0009] Preferably, the gun is also provided with a feed trough, which is vertically connected to the receiving cavity, and the other end extends to the outside of the gun and is connected to the feeding channel.

[0010] Preferably, the spiral conveyor includes a feeding section and a conveying section, the feeding section being opposite to the feeding trough and the pitch of the feeding section being not less than the diameter of the feeding trough; the conveying section is connected to the feeding section and extends to the end of the gun.

[0011] Preferably, the first grating group is disposed between the conveying roller and the feed trough, and is located on the side of the feeding channel to detect overflowing rubber material.

[0012] Preferably, the second grating group is disposed behind the conveying roller and below the feeding channel to detect the state of the input rubber material.

[0013] As can be seen from the above description of the present invention, compared with the prior art, the beneficial effects of the present invention are as follows: the first grating group monitors the state at the outlet of the rubber material feeding channel and feeds the signal back to the controller, which controls the feeding mechanism to work or stop, so as to avoid the injection molding effect being affected by the difference between the feeding speed and the discharge speed. At the same time, the second grating group set at the inlet of the feeding channel can sense the consumption of rubber material in time, and prevent the excessive rotation of the spiral conveyor rod of the injection gun due to material shortage, which would cause the temperature to rise and the rubber material to vulcanize. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the feeding mechanism of this utility model. Figure 1 ;

[0016] Figure 3 This is a cross-sectional view of the present invention;

[0017] Figure 4 This is a schematic diagram of the feeding mechanism of this utility model. Figure 2 ;

[0018] In the diagram: 1-Firing gun; 11-Receiving cavity; 12-Screw conveyor rod; 121-Feeding section; 122-Conveying section; 13-Feeding trough; 2-Feeding channel; 21-Upper feeding plate; 22-Lower feeding plate; 3-Feeding mechanism; 31-Feeding roller; 32-Conveying roller; 33-Reducer; 34-Feeding motor; 35-Synchronous gear set; 351-Drive gear; 352-Driven gear; 36-Anti-scratching roller; 4-Electrical control mechanism; 41-First grating group; 42-Second grating group. Detailed Implementation

[0019] The present invention will be further described below through specific embodiments.

[0020] Reference Figures 1 to 4 As shown, a feeding device for a rubber injection molding machine includes an injection gun 1, a feeding channel 2, a feeding mechanism 3, and an electrical control mechanism 4.

[0021] The gun 1 has a cavity 11 formed through one side and a spiral conveying rod 12 disposed in the cavity 11.

[0022] The feeding channel 2 is connected to the receiving cavity 11 and includes an upper feeding plate 21 and a lower feeding plate 22 arranged opposite each other. The rubber material passes through the space between the upper feeding plate 21 and the lower feeding plate 22. Specifically, the injection gun 1 is also provided with a feeding groove 13, which is vertically connected to the receiving cavity 11, and the other end extends to the outside of the injection gun 1 and connects to the feeding channel 2. The spiral conveyor 12 includes a feeding section 121 and a conveying section 122. The feeding section 121 is opposite to the feeding groove 13, and the pitch of the feeding section 121 is not less than the diameter of the feeding groove 13. The conveying section 122 is connected to the feeding section 121 and extends to the end of the injection gun 1 to ensure that the rubber material that can enter the feeding groove 13 can also be wound into the spiral conveyor 12 to avoid jamming.

[0023] The feeding mechanism 3 is installed in the feeding channel 2 to transport rubber material into the injection gun 1. The feeding mechanism 3 includes a feeding roller 31, a conveying roller 32, a reducer 33, and a feeding motor 34. The feeding roller 31 is horizontally arranged in the feeding channel 2, and its axis is perpendicular to the conveying direction of the rubber material. Two conveying rollers 32 are vertically arranged in the feeding channel 2, symmetrically clamping the rubber material on both sides. The reducer 33 is connected to the conveying roller 32. The feeding motor 34 is connected to the reducer 33 to drive the conveying roller 32 to rotate and convey the rubber material forward, so that the feeding mechanism 3 can stably convey the rubber material into the injection gun 1. Specifically, it also includes a synchronous gear set 35 disposed between the reducer 33 and the conveying roller 32. The synchronous gear set 35 includes a drive gear 351 and a driven gear 352. One end of the drive gear 351 is connected to one conveying roller 32, and the other end is connected to the reducer 33. The driven gear 352 is connected to another conveying roller 32 and meshes with the drive gear 351. Furthermore, it also includes anti-scratch rollers 36 arranged vertically on both sides of the feeding roller 31.

[0024] The electrical control mechanism 4 includes a first grating group 41, a second grating group 42, and a controller. The first grating group 41 and the second grating group 42 are respectively located at the front and rear ends of the feeding channel 2 to detect the state of the rubber material. The controller is connected to the feeding mechanism 3 and controls the feeding mechanism 3 to start or stop according to the signals fed back by the first grating group 41 and the second grating group 42. Specifically, the first grating group 41 is located between the conveying roller 32 and the feed trough 13, and is situated on the side of the feeding channel 2 to detect overflowing rubber material. Furthermore, the second grating group 42 is arranged behind the conveying roller 32 and below the feeding channel 2 via an extended frame to detect the state of the rubber material input upward from the raw material storage area, so that the machine can be stopped in time when the rubber material is used up.

[0025] In operation, heated rubber material is inserted into the feeding channel 2 and clamped by the conveying roller 32. The feeding motor 34 drives the conveying roller 32 to rotate, feeding the rubber material into the injection gun 1. When the device starts, the conveying speed of the conveying roller 32 on the rubber material is greater than the feeding speed of the injection gun 1, preventing the rubber material from being broken by the injection gun 1 and ensuring the density of the material injected by the injection gun 1. Due to the speed difference, the rubber material will accumulate at the feed trough 13. When overflow occurs, the first grating group 41 detects it and feeds the signal back to the controller. The controller controls the feeding motor 34 to decelerate or stop. When the sensing of the first grating group 41 terminates, the controller restarts the feeding motor 34. At the same time, when the rubber material is used up, the second grating group 42 can detect it and stop the injection gun 1 and the feeding mechanism 3 in time, preventing the injection gun 1 from over-rotating due to material shortage, causing the spiral conveyor rod 12 to heat up and the rubber material to vulcanize. This application can greatly improve the product quality and work efficiency of rubber injection molding and has high practicality.

[0026] The above description is merely a preferred embodiment of the present utility model, and therefore cannot be used to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the specification of the present utility model should still fall within the scope of the patent of the present utility model.

Claims

1. A feeding device for a rubber injection molding machine, characterized in that: The device includes a gun, a feeding channel, a feeding mechanism, and an electrical control mechanism. The gun has a cavity formed through it on one side, and a spiral conveying rod is disposed within the cavity. The feeding channel is connected to the cavity and includes an upper feeding plate and a lower feeding plate arranged opposite each other, through which rubber material passes. The feeding mechanism is disposed in the feeding channel to transport the rubber material into the gun. The electrical control mechanism includes a first grating group, a second grating group, and a controller. The first and second grating groups are respectively disposed at the front and rear ends of the feeding channel to detect the state of the rubber material. The controller is connected to the feeding mechanism and controls the feeding mechanism to start or stop based on signals fed back from the first and second grating groups.

2. The feeding device for a rubber injection molding machine according to claim 1, characterized in that: The feeding mechanism includes a feeding roller, a conveying roller, a reducer, and a feeding motor. The feeding roller is horizontally arranged in the feeding channel, and its axis is perpendicular to the conveying direction of the rubber material. There are two conveying rollers that are perpendicular to the feeding channel and are symmetrically clamped on both sides of the rubber material. The reducer is connected to the conveying roller. The feeding motor is connected to the reducer to drive the conveying roller to rotate and convey the rubber material forward.

3. The feeding device for a rubber injection molding machine according to claim 2, characterized in that: It also includes a synchronous gear set disposed between the reducer and the conveying roller. The synchronous gear set includes a drive gear and a driven gear. One end of the drive gear is connected to a conveying roller, and the other end is connected to the reducer. The driven gear is connected to another conveying roller and meshes with the drive gear.

4. The feeding device for a rubber injection molding machine according to claim 2, characterized in that: It also includes anti-scratch rollers arranged vertically on both sides of the feed roller.

5. The feeding device for a rubber injection molding machine according to claim 2, characterized in that: The gun is also equipped with a feed trough, which is vertically connected to the receiving cavity, and the other end extends to the outside of the gun and is connected to the feeding channel.

6. The feeding device for a rubber injection molding machine according to claim 5, characterized in that: The spiral conveyor includes a feeding section and a conveying section. The feeding section is opposite to the feeding trough, and the pitch of the feeding section is not less than the diameter of the feeding trough. The conveying section is connected to the feeding section and extends to the end of the gun.

7. The feeding device for a rubber injection molding machine according to claim 5, characterized in that: The first grating group is disposed between the conveying roller and the feed trough, and is located on the side of the feeding channel to detect overflowing rubber material.

8. The feeding device for a rubber injection molding machine according to claim 5, characterized in that: The second grating group is disposed behind the conveying roller and below the feeding channel to detect the state of the input rubber material.

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