A device for separating fine powder of phenolic molding compound

Abstract

The invention discloses a phenolic molding plastic fine powder separation device, which relates to the technical field of phenolic molding plastic processing. The upper end of an outer shell is cylindrical, and the lower end is truncated cone-shaped. A feed port is provided above the outer shell, and a negative pressure pipe is provided below the outer shell, and the feed port and the negative pressure pipe are symmetrically arranged. The lower end of the outer shell is connected to a collection box, and the collection box is used to collect phenolic molding plastic particles after fine powder separation; an inner cylinder is provided inside the outer shell, and the inner cylinder is coaxially installed with the outer shell, and a plurality of filter holes are provided in a circular array on the surface of the inner cylinder, and the filter holes are of a conical structure; a rotating cylinder is coaxially provided on the inner side of the inner cylinder, and spiral blades are provided on the circumferential surface of the lower section of the rotating cylinder, and the spiral blades are disconnected, and anti-sticking mechanisms are provided above multiple groups of push plates; the device solves the problem that when separating plastic particles and fine powder, the multi-stage screen is limited by the aperture when separating fine powder, and the fine powder and particles cannot be accurately separated, thereby affecting the separation quality of particles and fine powder.

Description

Technical Field

[0001] The invention relates to the technical field of phenolic molding compound processing, and more specifically to a phenolic molding compound fine powder separation device. Background Art

[0002] Phenolic molding compound is also called phenolic resin molding compound. It is a common thermosetting plastic, usually in the form of powder or granules. This granular phenolic resin can be melted and solidified under heating and pressure to form products with high hardness and good heat resistance. This plastic has good insulation and chemical corrosion resistance, so it is widely used in the manufacture of electrical components, mechanical parts, furniture accessories and other fields that require high strength and durability. During its manufacturing and molding, in order to ensure its fluidity and surface quality, it is usually necessary to separate the phenolic molding compound particles into fine powder, thereby ensuring that the phenolic resin particles are more uniform.

[0003] The prior art generally uses a rotary vibrating screen to separate fine powder from phenolic molding plastic particles, uses screens with different aperture sizes to classify the phenolic molding plastic particles, and uses a vibration motor to vibrate the screen to achieve separation between fine powder and particles. However, the separation accuracy of the rotary vibrating screen is limited by the aperture of the screen, and the particles cannot be completely and accurately separated, which will lead to unsatisfactory separation effect and affect the quality of the final product. At the same time, since the screen is driven by a vibration motor to vibrate, the screen and the screen frame are susceptible to wear and damage. Especially when processing particles with high hardness, the equipment needs to be replaced and maintained frequently, resulting in increased costs and time. At the same time, since the rotary vibrating screen is an open structure, the fine powder in the phenolic molding plastic particles will be emitted during screening. Due to the special chemical properties of the phenolic molding plastic particles, the health of the operators is affected. For this reason, an air classification method is proposed, which is separated according to particle size and density, and the phenolic molding plastic particles after the rotary vibrating screen are screened for a second time, so as to ensure that the fine powder in the particles is completely separated. This separation method will result in a long separation cycle and a large time cost, thereby affecting the overall separation efficiency of the phenolic molding plastic particles.

[0004] In view of the above situation, the present invention designs a phenolic molding compound fine powder separation device to solve the above technical problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a phenolic molding compound fine powder separation device, which solves the problem that when separating plastic particle fine powder, the multi-stage sieve is limited by the aperture when separating fine powder, and the fine powder and particles cannot be accurately separated, thus affecting the separation quality of particles and fine powder.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a phenolic molding plastic fine powder separation device, used for reducing the amount of fine powder in the phenolic molding plastic finished product, comprising an outer shell and a negative pressure device for generating negative pressure inside the chamber, the upper end of the outer shell is cylindrical, the lower end is truncated cone-shaped, a feed port is provided above the outer shell, a negative pressure pipe is provided below the outer shell, and the feed port and the negative pressure pipe are symmetrically arranged with each other, the lower end of the outer shell is connected to a collection box, and the collection box is used to collect the phenolic molding plastic particles after the fine powder is separated; an inner cylinder is provided inside the outer shell, and the inner cylinder is coaxially installed with the outer shell, the shape of the inner cylinder is consistent with the outer shell, and a pressure relief valve is formed between the outer shell and the inner cylinder for A flow cavity for temporarily storing fine powder, and a plurality of filter holes are arranged in a circular array on the surface of the inner cylinder, and the filter holes are of a conical structure; a rotating cylinder is coaxially arranged on the inner side of the inner cylinder, and the rotating cylinder is divided into an upper and a lower section, a push plate is arranged on the circumferential surface of the upper section of the rotating cylinder, and a plurality of push plates are arranged, and a spiral blade is arranged on the circumferential surface of the lower section of the rotating cylinder, and the spiral blade is a disconnected type, and an anti-sticking mechanism is arranged above the plurality of push plates; the rotating cylinder is rotated so that the push plate throws the phenolic molding plastic particles entering the inner cylinder to the inner circumferential surface of the inner cylinder, thereby allowing the fine powder in the phenolic molding plastic particles to pass through the filter holes, and the rotation of the rotating cylinder drives the anti-sticking mechanism to move back and forth on the push plate.

[0007] Preferably, a support frame is arranged above the outer shell, and a driving motor is installed on the support frame, and the output end of the driving motor passes through the outer shell and is coaxially arranged with the rotating cylinder.

[0008] Preferably, a spiral protrusion is provided in the flow chamber, and the spiral protrusion is in contact with the inner circumferential surface of the shell, and the spiral protrusion absorbs and releases the fine powder in the flow chamber by powering on and off.

[0009] Preferably, the pusher plate is an arc-shaped structure, the pusher plate is obliquely arranged on the outside of the rotating cylinder, and an annular circumferential array of the pusher plates is arranged on the outer circumferential surface of the rotating cylinder.

[0010] Preferably, the anti-sticking mechanism includes a mounting plate, a spring and a push plate. The mounting plate is arranged at the center of the push plate. Springs are symmetrically arranged on both sides of the mounting plate. One end of the spring is connected to the mounting plate, and the other end of the spring is connected to the push plate. When the rotating drum stops rotating, the push plate reciprocates on the push plate through the spring.

[0011] Preferably, a circulation outlet is provided at the upper end of the rotating cylinder, a circulation inlet is provided at the lower section of the rotating cylinder, and a circulation component is arranged inside the rotating cylinder, the circulation component includes a rotating shaft, auger blades and a discharging mechanism, the rotating shaft is coaxially installed with the rotating cylinder, and one end of the rotating shaft is in contact with the top end of the rotating cylinder, the auger blades are arranged on the outer circumferential surface of the rotating shaft, and the auger blades gradually change from a cylindrical shape to a truncated cone shape, and a discharging mechanism is arranged at the bottom end of the rotating shaft, and the discharging mechanism discharges the phenolic molding material in the inner cylinder through rotation.

[0012] Preferably, the auger blade is an inverted cone that gradually decreases from top to bottom, and the edge thickness of the auger blade is less than the thickness at the center of the auger blade.

[0013] Preferably, a conical protrusion is provided on the auger blade, the conical protrusion is spirally arranged from top to bottom, and the conical protrusion is located at the middle end of the auger blade.

[0014] Preferably, the discharging mechanism includes a spiral groove, a sleeve and a baffle plate. A spiral groove is provided at the front end of the rotating shaft, and a sleeve is provided at the front end of the rotating shaft. The sleeve reciprocates on the spiral groove through the rotation of the rotating shaft. The end of the sleeve away from the rotating shaft is connected to the baffle plate. The baffle plate is conically arranged with a small upper end and a large lower end, and the diameter of the lower end of the baffle plate is consistent with the diameter of the lower end of the inner cylinder.

[0015] Beneficial effects of the present invention:

[0016] 1. The present invention provides a phenolic molding plastic fine powder separation device, which enables a push plate to throw plastic particles onto the inner cylinder wall through the rotation of a rotating cylinder, so that the fine powder in the plastic passes through the filter holes provided on the inner cylinder and gathers in a flow chamber. At the same time, an anti-sticking mechanism is used to clean the fine powder on the push plate, thereby screening the plastic particles and avoiding the friction between the plastic particles causing static electricity to adhere to the fine powder on the push plate. The fine powder accumulated in the flow chamber is extracted by a negative pressure device to avoid the fine powder from flowing from the flow chamber to the inside, thereby improving the separation quality of the phenolic molding plastic particles and fine powder.

[0017] 2. The present invention provides a phenolic molding compound fine powder separation device, which cooperates with a discharging structure through a circulation mechanism. The circulation mechanism throws the push plate to the plastic particles on the wall of the inner cylinder, and the plastic particles are transported from bottom to top through the rotation of the rotating shaft, so that the plastic particles enter from the circulation inlet and flow from the circulation outlet through the auger blades. The plastic particles are swung for the second time by the push plate, thereby realizing secondary fine powder separation of the plastic particles, thereby ensuring the quality and separation efficiency of the fine powder separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a cross-sectional view of the overall structure of the present invention;

[0020] Figure 3 It is a partial enlarged view of the outer shell and the inner cylinder of the present invention;

[0021] Figure 4 It is a schematic diagram of the overall structure of the rotating drum of the present invention;

[0022] Figure 5 For the present invention Figure 4 The enlarged view of point A in the middle;

[0023] Figure 6 It is a partial view of the rotating shaft of the present invention;

[0024] Figure 7 It is a partial view of the lower end of the rotating shaft of the present invention.

[0025] Reference numerals:

[0026] 1. Shell; 11. Feed inlet; 111. Magnetic element; 12. Negative pressure tube; 13. Collecting box; 14. Inner cylinder; 141. Filter hole; 142. Conical structure; 143. Spiral protrusion; 15. Flow chamber; 2. Rotating cylinder; 21. Push plate; 211. Arc structure; 22. Spiral blade; 23. Anti-sticking mechanism; 231. Mounting plate; 232. Spring; 233. Push plate; 24. Circulation outlet; 25. Circulation inlet; 3. Circulation component; 31. Rotating shaft; 32. Auger blade; 33. Conical protrusion; 34. Discharging mechanism; 341. Spiral groove; 342. Sleeve; 343. Baffle plate; 4. Support frame; 41. Driving motor. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0028] refer to Figures 1 to 7As shown, a phenolic molding plastic fine powder separation device is used to reduce the amount of fine powder in the phenolic molding plastic finished product, including a shell 1 and a negative pressure device for generating negative pressure inside the chamber, the upper end of the shell 1 is cylindrical, and the lower end is truncated, a feed port 11 is opened on the top of the shell 1, and a negative pressure pipe 12 is arranged below the shell 1, and the feed port 11 and the negative pressure pipe 12 are arranged symmetrically with each other, and the lower end of the shell 1 is connected to a collection box 13, and the collection box 13 is used to collect phenolic molding plastic particles after fine powder separation; an inner cylinder 14 is arranged inside the shell 1, and the inner cylinder 14 is coaxially installed with the shell 1, and the shape of the inner cylinder 14 is consistent with the shell 1, and a flow cavity 15 for temporarily storing fine powder is formed between the shell 1 and the inner cylinder 14, and a plurality of filter holes 141 are arranged in a circular array on the surface of the inner cylinder 14, and the filter holes 141 are conical structures 1 42; a rotating cylinder 2 is coaxially arranged inside the inner cylinder 14, and the rotating cylinder 2 is divided into two sections, an upper and lower section, a push plate 21 is arranged on the circumferential surface of the upper section of the rotating cylinder 2, and multiple groups of push plates 21 are arranged, and a spiral blade 22 is arranged on the circumferential surface of the lower section of the rotating cylinder 2, and the spiral blade 22 is a disconnected type, and an anti-sticking mechanism 23 is arranged above the multiple groups of the push plates 21; the rotating cylinder 2 is rotated so that the push plate 21 throws the phenolic molding plastic particles entering the inner cylinder 14 to the inner circumferential surface of the inner cylinder 14, thereby allowing the fine powder in the phenolic molding plastic particles to pass through the filtering holes 141, and the rotation of the rotating cylinder 2 drives the anti-sticking mechanism 23 to reciprocate on the push plate 21, a support frame 4 is arranged above the outer shell 1, and a drive motor 41 is installed on the support frame 4, and the output end of the drive motor 41 passes through the outer shell 1 and is coaxially arranged with the rotating cylinder 2.

[0029] During the working process, the operator first adds the plastic particles that need to be separated into fine powder from the feed port 11, and then starts the drive motor 41. The drive motor 41 drives the rotating drum 2 to rotate. The rotation of the rotating drum 2 drives the push plate 21 to swing the plastic particles entering from the feed port 11. At this time, the push plate 21 swings the plastic particles to the inner wall of the inner drum 14, so that the plastic particles hit the inner drum 14, thereby swinging the fine powder in the plastic particles through the filter holes 141 into the flow cavity 15. At this time, the spiral blades 22 under the rotating drum 2 form a height difference for the plastic particles. Since a negative pressure device is connected to one side of the negative pressure tube 12, the fine powder inside the plastic particles is moved from the negative pressure tube 12 to an external storage device. When the rotating drum 2 stops rotating, the anti-sticking mechanism 23 on the push plate 21 cleans the surface of the push plate 21 to prevent the fine powder from adhering to the surface of the push plate 21, resulting in poor subsequent fine powder separation effect.

[0030] A spiral protrusion 143 is provided in the flow chamber 15, and the spiral protrusion 143 fits the inner circumferential surface of the outer shell 1. The spiral protrusion 143 absorbs and releases the fine powder in the flow chamber 15 by powering on and off. Through such a setting, the spiral protrusion 143 is energized during operation, and the fine powder temporarily stored in the flow chamber 15 is adsorbed by the principle of electrostatic adsorption to prevent the fine powder from entering the inner cylinder 14 again from the flow chamber 15 to form secondary mixing. After the work is completed, the spiral protrusion 143 is powered off, and the adsorbed fine powder can fall to the bottom of the flow chamber 15 and be discharged from the inside of the device through the negative pressure device.

[0031] The push plate 21 is an arc-shaped structure 211, which is tiltedly arranged on the outside of the rotating cylinder 2, and the push plate 21 is arranged in an annular circular array on the outer circumferential surface of the rotating cylinder 2. Through such an arrangement, when the rotating cylinder 2 rotates, the push plate 21 can throw the plastic particles onto the wall of the inner cylinder 14, and at the same time, the push plates 21 in multiple arrays can make the plastic particles repeatedly swing inside the inner cylinder 14, thereby ensuring the screening quality of the plastic particles.

[0032] The anti-sticking mechanism 23 includes a mounting plate 231, a spring 232 and a push plate 233. The mounting plate 231 is arranged at the center of the push plate 21. The springs 232 are symmetrically arranged on both sides of the mounting plate 231. One end of the spring 232 is connected to the mounting plate 231, and the other end of the spring 232 is connected to the push plate 233. When the rotating drum 2 stops rotating, the push plate 233 reciprocates on the push plate 21 through the spring 232. During the working process, the rotating drum 2 rotates to drive the push plate 233 on one side to stretch. The spring 232 and the push plate 233 on the other side compress the spring 232 to increase the swing amplitude of the plastic particles. When the rotating drum 2 stops rotating, the push plate 233 on one side of the tension spring 232 is affected by the elastic potential energy of the spring 232 and moves toward the mounting plate 231 to clean the fine powder on the push plate 21. The push plate 233 on the other side of the compression spring 232 is affected by the elastic force of the spring 232 and cleans the fine powder on the other side of the push plate 21, thereby avoiding the problem of fine powder adhering to the push plate 21 and reducing the subsequent separation effect.

[0033] A circulation outlet 24 is provided at the upper end of the rotating drum 2, a circulation inlet 25 is provided at the lower section of the rotating drum 2, and a circulation component 3 is arranged inside the rotating drum 2, the circulation component 3 includes a rotating shaft 31, an auger blade 32 and a discharging mechanism 34, the rotating shaft 31 is coaxially installed with the rotating drum 2, and one end of the rotating shaft 31 is in contact with the top of the inner part of the rotating drum 2, the outer circumferential surface of the rotating shaft 31 is provided with an auger blade 32, and the auger blade 32 gradually changes from a cylindrical shape to a truncated cone shape, and a discharging mechanism 34 is arranged at the bottom end of the rotating shaft 31, and the discharging mechanism 34 discharges the phenolic molding plastic in the inner drum 14 through rotation. During operation, the rotation of the rotating shaft 31 drives the auger blade 32 to rotate, and the plastic particles at the bottom are lifted from the circulation inlet 25 to the circulation outlet 24, and the rotation of the rotating drum 2 drives the push plate 21 to perform secondary fine powder separation of the plastic particles. After the work is completed, the plastic particles separated internally are discharged through the pushing mechanism.

[0034] The auger blade 32 is an inverted cone that gradually decreases from top to bottom. The edge thickness of the auger blade is less than the thickness at the center of the auger blade 32. The inverted cone-shaped auger blade 32 can speed up the plastic particle conveying efficiency. At the same time, the edge thickness is less than the thickness at the center of the auger blade 32, which can make the plastic particles move more smoothly and quickly when moving upward, thereby improving the plastic particle separation efficiency.

[0035] The auger blade 32 is provided with a conical protrusion 33, which is spirally arranged from top to bottom and located at the middle end of the auger blade 32. Such an arrangement can flip the gathered plastic particles when the plastic particles move upward, so that the gathered plastic fine powder inside can be quickly turned out.

[0036] The pushing mechanism includes a spiral groove 341, a sleeve 342 and a baffle plate 343. The spiral groove 341 is provided at the front end of the rotating shaft 31, and the sleeve 342 is provided at the front end of the rotating shaft 31. The sleeve 342 reciprocates on the spiral groove 341 through the rotation of the rotating shaft 31. The end of the sleeve 342 away from the rotating shaft 31 is connected to the baffle plate 343. The baffle plate 343 is set in a conical shape with a small upper end and a large lower end, and the lower end diameter of the baffle plate 343 is consistent with the lower end diameter of the inner cylinder 14. During operation, the spiral groove 341 drives the sleeve 342 to move downward through the rotation of the rotating shaft 31, thereby causing the baffle plate 343 to move downward. Through the setting of the conical structure 142, the speed at which the plastic particles fall is accelerated, thereby improving the separation efficiency of the device.

[0037] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A phenolic molding compound fine powder separation device for reducing the amount of fine powder in a phenolic molding compound product, comprising a housing (1) and a negative pressure device for generating negative pressure inside a chamber, wherein the housing (1) has a cylindrical upper end and a truncated cone lower end, and is characterized in that: A feed inlet (11) is provided above the shell (1), a negative pressure pipe (12) is provided below the shell (1), and the feed inlet (11) and the negative pressure pipe (12) are symmetrically arranged with respect to each other. The lower end of the shell (1) is connected to a collection box (13), and the collection box (13) is used to collect phenolic molding material particles after fine powder separation. An inner cylinder (14) is arranged inside the outer shell (1), and the inner cylinder (14) is coaxially mounted with the outer shell (1); the shape of the inner cylinder (14) is consistent with that of the outer shell (1); a flow cavity (15) for temporarily storing fine powder is formed between the outer shell (1) and the inner cylinder (14); a plurality of filter holes (141) are arranged in a circular array on the surface of the inner cylinder (14), and the filter holes (141) are conical structures (142); A rotating cylinder (2) is coaxially arranged inside the inner cylinder (14), and the rotating cylinder (2) is divided into upper and lower sections. A push plate (21) is arranged on the circumferential surface of the upper section of the rotating cylinder (2), and a plurality of push plates (21) are arranged. A spiral blade (22) is arranged on the circumferential surface of the lower section of the rotating cylinder (2), and the spiral blade (22) is a disconnected type. An anti-sticking mechanism (23) is arranged above the plurality of push plates (21). The rotating cylinder (2) rotates so that the push plate (21) throws the phenolic molding plastic particles entering the inner cylinder (14) to the inner circumferential surface of the inner cylinder (14), thereby allowing fine powder in the phenolic molding plastic particles to pass through the filter holes (141). The rotating cylinder (2) rotates to drive the anti-sticking mechanism (23) to reciprocate on the push plate (21); The anti-sticking mechanism (23) comprises a mounting plate (231), a spring (232) and a push plate (233); the mounting plate (231) is arranged at the center of the push plate (21); springs (232) are symmetrically arranged on both sides of the mounting plate (231); one end of the spring (232) is connected to the mounting plate (231); the other end of the spring (232) is connected to the push plate (233); when the rotating drum (2) stops rotating, the push plate (233) reciprocates on the push plate (21) through the spring (232); The upper end of the rotating cylinder (2) is provided with a circulation outlet (24), the lower section of the rotating cylinder (2) is provided with a circulation inlet (25), and a circulation assembly (3) is arranged inside the rotating cylinder (2), the circulation assembly (3) comprising a rotating shaft (31), an auger blade (32) and a discharge mechanism (34), the rotating shaft (31) being coaxially mounted with the rotating cylinder (2), one end of the rotating shaft (31) being in contact with the top end of the rotating cylinder (2), the outer circumferential surface of the rotating shaft (31) being provided with an auger blade (32), and the auger blade (32) gradually changes from a cylindrical shape to a truncated cone shape, and the bottom end of the rotating shaft (31) is provided with a discharge mechanism (34), and the discharge mechanism (34) discharges the phenolic molding material in the inner cylinder (14) by rotating.

2. A phenolic molding compound fine powder separation device according to claim 1, characterized in that: A support frame (4) is arranged above the outer shell (1), and a driving motor (41) is mounted on the support frame (4). The output end of the driving motor (41) passes through the outer shell (1) and is coaxially arranged with the rotating cylinder (2).

3. A phenolic molding compound fine powder separation device according to claim 1, characterized in that: A spiral protrusion (143) is provided in the flow chamber (15), and the spiral protrusion (143) is in contact with the inner circumferential surface of the housing (1). The spiral protrusion (143) absorbs and releases fine powder in the flow chamber (15) by means of power on and power off.

4. A phenolic molding compound fine powder separation device according to claim 1, characterized in that: The push plate (21) is an arc-shaped structure (211), the push plate (21) is arranged obliquely on the outside of the rotating cylinder (2), and an annular circumferential array of the push plates (21) is arranged on the outer circumferential surface of the rotating cylinder (2).

5. A phenolic molding compound fine powder separation device according to claim 1, characterized in that: The auger blade (32) is in the shape of an inverted cone that gradually decreases from top to bottom, and the thickness of the edge of the auger blade (32) is smaller than the thickness of the center of the auger blade (32).

6. A phenolic molding compound fine powder separation device according to claim 5, characterized in that: The auger blade (32) is provided with a conical protrusion (33), the conical protrusion (33) is spirally arranged from top to bottom, and the conical protrusion (33) is located at the middle end of the auger blade (32).

7. A phenolic molding compound fine powder separation device according to claim 1, characterized in that: The discharging mechanism (34) comprises a spiral groove (341), a sleeve (342) and a baffle plate (343). The front end of the rotating shaft (31) is provided with a spiral groove (341), and the front end of the rotating shaft (31) is provided with a sleeve (342). The sleeve (342) reciprocates on the spiral groove (341) through the rotation of the rotating shaft (31). The end of the sleeve (342) away from the rotating shaft (31) is connected to the baffle plate (343). The baffle plate (343) is arranged in a conical shape with a small upper end and a large lower end, and the diameter of the lower end of the baffle plate (343) is consistent with the diameter of the lower end of the inner cylinder (14).

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