Circulating screen of spreading machine for shaving board production

Abstract

The utility model discloses a circulating screen of a spreading machine for shaving board production, which comprises a stock bin, a scattering roller, an air bellow and a spreading belt conveyor, and further comprises a first turnabout roller, a second turnabout roller and a third turnabout roller which are rotationally connected with a case, a first screen is connected among the first redirection roller, the second redirection roller and the third redirection roller in a circulating transmission mode, a vibration rod is arranged on the bottom wall of a horizontal conveying section of the first screen, the outer wall of the vibration rod is attached to the first screen in a sliding mode, and the outer end of the vibration rod is fixedly connected with a support. The bottom end of the support is fixedly connected with a rack of the paving belt conveyor. The vibrating screen has the beneficial effects that residual wood shavings adhered to the first screen which circularly operates can be vibrated off through the vibrating bar, so that the first screen is prevented from being blocked, the wood shavings are uniformly paved, the density of a paved plate blank becomes uniform, and the product quality is improved.

Description

Technical field:

[0001] The utility model belongs to the field of particle board production, in particular to a circulating screen of a paving machine for particle board production. Background technology:

[0002] Particleboard is a type of wood panel made by pressing a mixture of sawdust and glue. To make particleboard, the wood is first cut into small pieces. These pieces are then placed in a particleboard mill to produce shavings of varying sizes and shapes. The shavings are then mixed with glue and pressed into boards. Finally, the finished particleboard is dried and trimmed.

[0003] In the particleboard production process, the paving machine is one of the main equipment. The shavings in the paving metering bin fall evenly into the wind chamber of the paving machine under the action of the scattering roller. Under the action of the airflow, the shavings will be blown onto the inclined screen for screening and classification. The small particle shavings passing through the screen will first fall onto the paving belt conveyor below, and the large particle shavings screened out by the screen will fall onto the top surface of the paved small particle screen shaving layer, thereby realizing the fine and coarse gradient surface structure of the particleboard. In the actual production process, since the shavings need to be added with a thickener (the initial viscosity of the thickener is low) on its surface before paving to increase the initial strength of the paving slab, some large particle shavings will adhere to the surface of the screen and cannot fall in time, resulting in blockage of the screen. The shavings cannot fall evenly onto the paving belt conveyor, resulting in uneven density of the paving slab and serious defects in product surface quality. Utility model content:

[0004] The purpose of the utility model is to provide a circulating screen for a paving machine for particleboard production, and to overcome the deficiencies of the above-mentioned prior art, which effectively solves the existing problem of screen clogging during particleboard paving.

[0005] The content of the utility model: A circulating screen of a paving machine for particleboard production, comprising a silo, a scattering roller, a bellows and a paving belt conveyor, and also comprising a first redirecting roller, a second redirecting roller and a third redirecting roller rotatably connected to the machine chassis, a first screen being connected in a circulating transmission between the first redirecting roller, the second redirecting roller and the third redirecting roller, a vibrating rod being provided on the bottom wall of the horizontal conveying section of the first screen, an outer wall of the vibrating rod being slidably fitted with the first screen, an outer end of the vibrating rod being fixedly connected to a bracket, and a bottom end of the bracket being fixedly connected to the frame of the paving belt conveyor.

[0006] Furthermore, the vibrating rod is horizontally arranged on the bottom wall of the first screen horizontal conveying section.

[0007] Furthermore, the length of the vibration rod is the same as the width of the first screen.

[0008] Furthermore, it also includes a tension roller, and the first screen is connected to the first redirecting roller, the second redirecting roller, the third redirecting roller and the tension roller in a circular transmission manner.

[0009] Furthermore, a pair of rollers are vertically arranged outside the inclined conveying section of the first screen, and the second screen is connected to the pair of rollers in a circular transmission manner.

[0010] The beneficial effects of the utility model are as follows: the residual shavings adhering to the circulating first screen can be vibrated off by the vibrating rod, thereby avoiding clogging of the first screen, ensuring uniform laying of the shavings, making the density of the paved slab uniform, and improving product quality. Description of the drawings:

[0011] Figure 1 This is a cross-sectional view of the overall structure of the utility model;

[0012] Figure 2 for Figure 1 Sectional view of section AA;

[0013] In the figure, 1 is the silo, 2 is the breaking roller, 3 is the bellows, 4 is the paving belt conveyor, 5 is the chassis, 6 is the first redirecting roller, 7 is the second redirecting roller, 8 is the third redirecting roller, 9 is the first screen, 10 is the vibrating rod, 11 is the bracket, 12 is the tension roller, 13 is the rotating roller, and 14 is the second screen. Specific implementation method:

[0014] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described with reference to the accompanying drawings:

[0015] like Figures 1 to 2As shown, a circulating screen of a paving machine for particleboard production includes a silo 1, a scattering roller 2, a bellows 3 and a paving belt conveyor 4, and also includes a first redirecting roller 6, a second redirecting roller 7 and a third redirecting roller 8 rotatably connected to the chassis 5, a first screen 9 is connected in a circulating transmission between the first redirecting roller 6, the second redirecting roller 7 and the third redirecting roller 8, a vibrating rod 10 is provided on the bottom wall of the horizontal conveying section of the first screen 9, the outer wall of the vibrating rod 10 is slidably fitted with the first screen 9, the outer end of the vibrating rod 10 is fixedly connected to the bracket 11, and the bracket The bottom end of 11 is fixedly connected to the frame of the paving belt conveyor 4, and the vibrating rod 10 is horizontally arranged on the bottom wall of the horizontal conveying section of the first screen 9. The length of the vibrating rod 10 is the same as the width of the first screen 9. It also includes a tension roller 12, and the first screen 9 is connected in a circulating transmission between the first redirecting roller 6, the second redirecting roller 7, the third redirecting roller 8 and the tension roller 12. A pair of rollers 13 are vertically arranged on the outside of the inclined conveying section of the first screen 9, and a second screen 14 is connected in a circulating transmission between the pair of rollers 13.

[0016] Specifically, the vibrating rod 10 can be used to shake off the residual shavings adhering to the circulating first screen 9, thereby preventing the first screen 9 from being blocked.

[0017] In actual use, the silo 1 puts out the stored shavings. At this time, the rotating scattering roller 2 located below the discharge port of the silo 1 evenly scatters the shavings and drops them to the air outlet of the bellows 3. At this time, the wind evenly discharged from the bellows 3 blows the shavings evenly to the inclined conveying section of the first screen 9. The small particle shavings pass through the first screen 9 and fly to the second screen 14 at the rear. At this time, the second screen 14 intercepts most of the small particle shavings and the viscosity of this part of the shavings is very low and will not adhere to the second screen 14. At this time, the second screen 14 The intercepted small-particle shavings will evenly fall onto the paving belt conveyor 4 being transported below, while the large-particle shavings intercepted by the first screen 9 will move along the conveying direction. When the large-particle shavings are conveyed to the horizontal conveying section of the first screen 9, the large-particle shavings will fall from the mesh of the first screen 9 onto the paving belt conveyor 4 being transported below. At this time, the laying of the fine-coarse gradient surface structure of the particleboard is completed. During the shavings laying process, the mesh of the first screen 9 is larger than the mesh of the second screen 14.

[0018] During the laying process, the vibrating rod 10 will transmit vibration to the first screen 9, so that the large-particle wood shavings adhering to the first screen 9 can be vibrated off and fall through the mesh holes of the first screen 9 onto the paving belt conveyor 4 being transported below, thereby avoiding the wood shavings from clogging the mesh holes and achieving a uniform laying effect; the vibrating rod 10 is horizontally arranged in the horizontal conveying section of the first screen 9 to make its vibration transmission effect better, and the adhering wood shavings are more easily vibrated off; the vibrating rod 10 used in this process belongs to the existing technology and will not be described in detail here.

[0019] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A circulating screen for a particleboard paving machine, comprising a hopper (1), a scattering roller (2), a bellows (3) and a paving belt conveyor (4), characterized in that: The invention also includes a first redirecting roller (6), a second redirecting roller (7) and a third redirecting roller (8) which are rotatably connected to the chassis (5); a first screen (9) is cyclically connected between the first redirecting roller (6), the second redirecting roller (7) and the third redirecting roller (8); a vibrating rod (10) is provided on the bottom wall of the horizontal conveying section of the first screen (9); the outer wall of the vibrating rod (10) is slidably fitted with the first screen (9); the outer end of the vibrating rod (10) is fixedly connected to a bracket (11); and the bottom end of the bracket (11) is fixedly connected to the frame of the paving belt conveyor (4).

2. The circulating screen for a particleboard paving machine according to claim 1, characterized in that: The vibrating rod (10) is horizontally arranged on the bottom wall of the horizontal conveying section of the first screen (9).

3. The circulating screen for a particleboard paving machine according to claim 2, characterized in that: The length of the vibrating rod (10) is the same as the width of the first screen (9).

4. The circulating screen for a particleboard paving machine according to claim 1, characterized in that: It also includes a tension roller (12), and the first screen (9) is connected in a circular transmission manner between the first redirecting roller (6), the second redirecting roller (7), the third redirecting roller (8) and the tension roller (12).

5. The circulating screen for a particleboard paving machine according to claim 1, characterized in that: A pair of rollers (13) are vertically arranged outside the inclined conveying section of the first screen (9), and a second screen (14) is connected between the pair of rollers (13) in a circular transmission manner.

Images