Continuous extrusion forming equipment

Abstract

According to the continuous extrusion forming equipment, a rotating ring is arranged on the periphery of a fixed curved-surface ring, the fixed curved-surface ring and the rotating ring are installed in a box body, the rotating ring can rotate relative to the fixed curved-surface ring, a plurality of forming holes are formed in the rotating ring, pressing assemblies are arranged in the forming holes, one end of each pressing assembly can slide in the corresponding forming hole, and the other end of each pressing assembly can slide in the corresponding forming hole. The other end of the pressing assembly abuts against the periphery of the fixed curved-surface ring, and the section of the outer ring of the fixed curved-surface ring is a non-circular contour. According to the continuous extrusion forming equipment, the pressing assembly sliding on the surface of the fixing curved-surface ring slides in the forming hole through the fixing curved-surface ring, an inner cavity of the forming hole is used for containing powder to be compressed, the powder can be sucked into the forming hole through the pressing assembly and extruded into particles, it can be guaranteed that the specifications of the particles are consistent, and the forming quality is controllable; the forming holes are formed in the side wall of the rotating ring, and due to the fact that a rolling mode is adopted, the productivity can be preferentially improved by changing the diameter and increasing the length, and the production efficiency is high.

Description

Technical Field

[0001] The invention belongs to the field of powder granulation, and in particular relates to a continuous extrusion molding device. Background Art

[0002] There are many powder materials in the chemical industry. Due to the safety factors such as flammability and explosion involved in transportation and storage, the powder materials need to be processed into larger particles by extrusion for easy transportation and storage.

[0003] Currently, the more common methods on the market include double-roll extrusion briquette machines and rotary extruders.

[0004] 1. The briquetting machine is mainly used in coal mining and steel fields to extrude waste coal powder or steel slag powder into granular items of a certain shape.

[0005] The principle of the ball press machine: It consists of two pairs of rollers, each of which is processed with grooves of a certain shape and number as required. When the rollers move, the grooves correspond to each other. After the material enters from one side of the rollers, it is squeezed by the two grooves to form a granular object.

[0006] The advantage is low cost, and the disadvantage is that the grooves of the rollers cannot completely overlap, so the extrusion molding equipment will have an obvious docking gap. At the same time, since the rollers cannot be completely closed, a certain amount of material waste will be caused outside the grooves.

[0007] 2. Rotary extruders are mainly used in the pharmaceutical and food fields to extrude powdered drugs or foods into flake or granular tablets or foods.

[0008] The principle of rotary extruder: It consists of a rotating disk, a corrugated plate and an extrusion rod. There are multiple holes on the rotating disk that match the extrusion rod, and one end of the extrusion rod contacts the corrugated plate. After the powder is introduced into the holes of the rotating disk, the rotating disk drives the extrusion rod to rotate horizontally, and the inclined surface of the corrugated tube pushes out the extrusion rod and extrude the powder material. After extrusion, the material will be divided into flakes or granules.

[0009] The advantage is that the molding material has an excellent shape and there is no material waste. The disadvantage is that the production capacity is low, and the larger the material, the lower the output.

[0010] The existing institutions have the following shortcomings:

[0011] 1. The grooves of the rollers of the ball press cannot completely overlap, so there will be an obvious docking gap in the extrusion molding equipment.

[0012] 2. Since the rollers of the ball press cannot be completely closed, there will be a certain amount of material waste outside the groove.

[0013] 3. Due to the structure of the rotary extruder, the production capacity is relatively limited, and it is only suitable for sheet materials below 20 mm. As the size increases, the production capacity decreases significantly. Summary of the invention

[0014] In view of this, the present invention aims to propose a continuous extrusion molding equipment to solve the defects of the prior art ball press, that is, the grooves of the rollers cannot be completely overlapped, the products have docking gaps, and the production capacity is relatively limited due to the structure of the rotary extruder.

[0015] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0016] A continuous extrusion molding device includes a fixed curved surface ring, a rotating ring and a clamping assembly. The rotating ring is arranged on the periphery of the fixed curved surface ring, and the fixed curved surface ring and the rotating ring are respectively installed in a box body. The rotating ring can rotate relative to the fixed curved surface ring. A plurality of forming holes are arranged on the rotating ring. A clamping assembly is arranged in the forming hole, and one end of the clamping assembly can slide in the forming hole, and the other end of the clamping assembly abuts against the periphery of the fixed curved surface ring. The cross-section of the outer ring of the fixed curved surface ring is a non-circular contour.

[0017] Furthermore, the clamping assembly includes a sliding rod, and the periphery of the sliding rod is sealed and connected to the forming hole through a sealing gasket.

[0018] Furthermore, a roller is rotatably arranged at the lower end of the slide rod, and the periphery of the roller is rollingly connected to the periphery of the fixed curved ring.

[0019] Furthermore, a reset baffle is arranged on the periphery of the slide rod, and the reset baffle is elastically connected to the inner ring of the rotating ring through a reset spring.

[0020] Furthermore, the fixed curved surface ring is fixedly sleeved in the box body, the rotating ring is rotatably sleeved in the box body, and a positioning sprocket is arranged at one end of the rotating ring, and the external power can drive the positioning sprocket to rotate.

[0021] Furthermore, a compression baffle is installed in the box body, and the compression baffle is located on one side of the rotating ring, and one side of the compression baffle is used to cover the opening of the forming hole.

[0022] Furthermore, the cross section of the clamping baffle is an arc-shaped structure, the inner side of the clamping baffle is close to the periphery of the rotating ring, and a plurality of sealing plates are arranged on the periphery of the clamping baffle, and one end of the sealing plate is used to cover the opening of the forming hole.

[0023] Furthermore, one end of each blocking plate is rotatably connected to the chain, and the positioning sprocket can drive the chain to move.

[0024] Furthermore, each of the formed holes is located between two adjacent sprocket teeth on the positioning sprocket, and one end of each blocking plate is respectively sleeved on a pin shaft of the chain.

[0025] Furthermore, both ends of the clamping baffle are rotatably connected to the driven sprockets, and the chain is meshed with the periphery of each driven sprocket.

[0026] Furthermore, the outer contour of the fixed curved surface ring includes a suction zone, a compression zone, an ejection zone and a holding zone which are arranged in sequence, and the suction zone, the compression zone, the ejection zone and the holding zone are all continuous curve segments, the outer diameter from the suction zone to the compression zone gradually decreases, the outer diameter from the compression zone and the ejection zone to the holding zone gradually increases, and the outer diameter of the holding zone remains unchanged.

[0027] Furthermore, the box body is provided with an inlet and an outlet respectively, the suction zone is located below the inlet, the ejection zone is located above the outlet, the compression zone is close to the side of the clamping baffle, and the holding zone is located on the side away from the clamping baffle.

[0028] Compared with the prior art, the continuous extrusion molding equipment described in the present invention has the following beneficial effects:

[0029] (1) The continuous extrusion molding equipment described in the present invention uses the non-circular contour of the fixed curved ring to enable the pressing component sliding on the surface to slide in the molding hole. The inner cavity of the molding hole is used to hold the powder to be compressed. The reciprocating compression component can suck the powder into the molding hole and extrude it into particles, which can ensure the consistency of the specifications of the particles, high molding efficiency, and controllable molding quality. The molding hole is opened on the side wall of the rotating ring. Due to the use of a rolling form, the production capacity can be preferentially increased by changing the diameter and increasing the length, and the production efficiency is high.

[0030] (2) The continuous extrusion molding equipment described in the present invention ensures the sealing performance between the outer periphery of the slide rod and the molding hole through a sealing gasket. When the end of the slide rod is away from the opening of the molding hole, it can form a negative pressure suction effect on the powder, thereby ensuring the efficiency and quality of the powder filling in the molding hole.

[0031] (3) The continuous extrusion molding equipment described in the present invention reduces the contact friction between the two and increases the service life of the parts by rolling the outer periphery of the roller to the outer periphery of the fixed curved ring;

[0032] The return spring makes the periphery of the roller always fit to the periphery of the fixed curved ring, ensuring that the slide bar can slide along with the curved surface of the fixed curved ring, thereby improving production quality.

[0033] (4) In the continuous extrusion molding device described in the present invention, the blocking plate and the axially sliding slide rod are the extrusion structures for powder molding particles, the opening of the molding hole is blocked by the blocking plate, and then the powder is squeezed by the end of the slide rod so as to compact the powder into particles, and no defects such as particle joints will be generated after the molding process;

[0034] When the blocking plate blocks the forming hole, there is a process of gradual closing and opening, which can form a clamping structure with the sliding rod, thereby ensuring the forming quality.

[0035] (5) In the continuous extrusion molding equipment described in the present invention, the molding hole is between two adjacent chain teeth, the sealing plate is on the pin shaft of the chain, and the chain teeth are meshed between the two adjacent pin shafts. Through this rigid repeated positioning method, it is ensured that each molding hole is sealed by the sealing plate, thereby improving the reliability of the molding device and ensuring the molding quality. In addition, the rotating ring and the sealing plate are both driven by a power source, which not only ensures the consistency of movement, but also avoids dry grinding and reduces production energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0037] Figure 1 A cross-sectional schematic diagram of a continuous extrusion molding device according to an embodiment of the present invention;

[0038] Figure 2 It is a schematic diagram of the unfolding of the outer ring profile of the fixed curved surface ring according to an embodiment of the present invention;

[0039] Figure 3 It is a cross-sectional schematic diagram of a pressing assembly provided in a rotating ring according to an embodiment of the present invention;

[0040] Figure 4 It is a cross-sectional schematic diagram of the clamping assembly according to an embodiment of the present invention;

[0041] Figure 5 It is a schematic diagram of the structure of the chain described in an embodiment of the present invention.

[0042] Description of reference numerals:

[0043] 1-fixed curved ring; 11-suction area; 12-compression area; 13-ejection area; 14-holding area; 2-rotating ring; 21-forming hole; 3-pressing assembly; 31-sliding rod; 32-sealing pad; 33-roller; 34-reset baffle; 35-reset spring; 4-box; 41-feeding port; 42-discharging port; 5-positioning sprocket; 51-sprocket; 6-pressing baffle; 61-blocking plate; 62-chain; 621-pin shaft; 63-follower sprocket. DETAILED DESCRIPTION

[0044] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0047] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0048] like Figure 1-Figure 5 As shown, a continuous extrusion molding device includes a fixed curved surface ring 1, a rotating ring 2 and a clamping assembly 3. The rotating ring 2 is arranged on the periphery of the fixed curved surface ring 1, and the fixed curved surface ring 1 and the rotating ring 2 are respectively installed in a box body 4. The rotating ring 2 can rotate relative to the fixed curved surface ring 1. A plurality of forming holes 21 are arranged on the rotating ring 2. The clamping assembly 3 is arranged in the forming hole 21, and one end of the clamping assembly 3 can slide in the forming hole 21. The other end of the clamping assembly 3 abuts against the periphery of the fixed curved surface ring 1. The outer ring cross-section of the fixed curved surface ring 1 is a non-circular contour. The moving ring 2 is a circular ring body. The non-circular contour of the fixed curved ring 1 allows the clamping component 3 sliding on its surface to slide in the forming hole 21. The inner cavity of the forming hole 21 is used to hold the powder to be compressed. The reciprocatingly sliding compression component can suck the powder into the forming hole 21 and squeeze it into particles, which can ensure the consistency of the specifications of the particles, high molding efficiency, and controllable molding quality. The molding hole 21 is opened on the side wall of the rotating ring 2. Due to the rolling form, the production capacity can be preferentially improved by changing the diameter and increasing the length, and the production efficiency is high.

[0049] The clamping assembly 3 includes a sliding rod 31, and the periphery of the sliding rod 31 is sealed and connected to the forming hole 21 through a sealing gasket 32. The sealing gasket 32 ​​ensures the sealing performance between the periphery of the sliding rod 31 and the forming hole 21. When the end of the sliding rod 31 is away from the opening of the forming hole 21, it can form a negative pressure suction effect on the powder, thereby ensuring the efficiency and quality of the powder filling in the forming hole 21.

[0050] A roller 33 is rotatably set at the lower end of the slide bar 31, and the periphery of the roller 33 is rollingly connected to the periphery of the fixed curved ring 1. By rollingly connecting the periphery of the roller 33 to the periphery of the fixed curved ring 1, the contact friction between the two is reduced and the service life of the parts is improved. A reset baffle 34 is set at the periphery of the slide bar 31, and the reset baffle 34 is elastically connected to the inner ring of the rotating ring 2 through a reset spring 35. The reset spring 35 makes the periphery of the roller 33 always fit to the periphery of the fixed curved ring 1, thereby ensuring that the slide bar 31 can slide with the change of the curved surface of the fixed curved ring 1, thereby improving the production quality.

[0051] A clamping baffle 6 is installed in the box body 4, and the clamping baffle 6 is located on one side of the rotating ring 2. One side of the clamping baffle 6 is used to cover the opening of the forming hole 21, and the cross-section of the clamping baffle 6 is an arc-shaped structure. The inner side of the clamping baffle 6 is close to the periphery of the rotating ring 2. The clamping baffle 6 and the axially sliding slide rod 31 are the extrusion structure of the powder forming particles. The opening of the forming hole 21 is sealed by the clamping baffle 6, and then the powder is extruded by the end of the slide rod 31 so that the powder is compacted into particles, and no defects such as particle butt joints will be generated after the forming process.

[0052] When the above-mentioned clamping plate blocks the opening, the forming hole 21 moves to the clamping plate to complete the blocking. The transition structure in the process makes it easy for air to be trapped in the forming hole 21. A plurality of sealing plates 61 are arranged on the periphery of the clamping baffle 6. One end of the sealing plate 61 is used to cover the opening of the forming hole 21. When the sealing plate 61 blocks the forming hole 21, there is a process of gradual closing and opening, which can form a clamping structure with the sliding rod 31 to ensure the forming quality.

[0053] When the cam 62 is in the locking position, the chain 62 is engaged with the chain 62 and the locking cam 63 is engaged with the chain 62. When the cam 62 is in the locking position, the chain 62 is engaged with the chain 62 and the locking cam 63 is engaged with the chain 62.

[0054] During implementation, both ends of the clamping baffle 6 are rotatably connected to the follower sprocket 63, and the chain 62 is engaged with the periphery of each follower sprocket 63. The follower sprocket 63 is used to guide the chain 62 to prevent the chain 62 from scraping the end of the clamping baffle 6, thereby improving the durability of the parts.

[0055] like Figure 1 and Figure 2 As shown, the outer contour of the fixed curved ring 1 includes a suction area 11, a compression area 12, an ejection area 13 and a holding area 14 which are arranged in sequence, and the suction area 11, the compression area 12, the ejection area 13 and the holding area 14 are all continuous curve segments, the outer diameter from the suction area 11 to the compression area 12 gradually decreases, and the outer diameters from the compression area 12 and the ejection area 13 to the holding area 14 gradually increase, and the outer diameter of the holding area 14 remains unchanged, and the box body 4 is respectively provided with an inlet 41 and an outlet 42, and the suction area 11 is located at The ejection zone 13 is located below the feed port 41 and above the discharge port 42. The compression zone 12 is close to the side of the clamping baffle 6. The holding zone 14 is located on the side away from the clamping baffle 6. The suction zone 11 coincides with the feed port 41 and is responsible for sucking the material into the forming hole 21. The compression zone 12 cooperates with the sealing plate 61 to extrude the powder material. The ejection zone 13 is responsible for ejecting the extruded granular material out of the forming hole 21 and guiding it out from the discharge port 42. The holding zone 14 is a blank, non-operating area.

[0056] The powder is fed into the feed port 41, and the rotating ring 2 rotates at this time. Since the fixed curved ring 1 is a curved surface profile, the slide bar 31 slides axially in the forming hole 21, and the return spring 35 drives the roller 33 to gradually move toward the axis of the rotating ring 2. Since there is a seal between the slide bar 31 and the forming hole 21, the powder can be sucked into the forming hole 21 through vacuum. After reaching a certain angle (reaching the total amount of material), with continuous rotation, the curved surface profile will gradually push out the slide bar 31. At the same time, the sealing plate 61 intervenes and presses the opening of the forming hole 21. After reaching a certain angle, the extrusion amount (design value) is met to form the powder into compact solid particles. With the continuous ejection of the slide bar 31, the sealing plate 61 is separated from the outer surface of the rotating ring 2. With the continuous ejection action, the material is ejected out of the forming hole 21 and pushed into the discharge port 42.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A continuous extrusion molding device, characterized in that: The invention comprises a fixed curved ring (1), a rotating ring (2) and a clamping assembly (3); the rotating ring (2) is arranged on the periphery of the fixed curved ring (1), and the fixed curved ring (1) and the rotating ring (2) are respectively installed in a box (4); the rotating ring (2) can rotate relative to the fixed curved ring (1); a plurality of forming holes (21) are arranged on the rotating ring (2); a clamping assembly (3) is arranged in the forming hole (21); one end of the clamping assembly (3) can slide in the forming hole (21), and the other end of the clamping assembly (3) abuts against the periphery of the fixed curved ring (1); and the outer ring cross section of the fixed curved ring (1) is a non-circular contour.

2. A continuous extrusion molding device according to claim 1, characterized in that: The pressing assembly (3) comprises a sliding rod (31), and the periphery of the sliding rod (31) is sealed and connected to the molding hole (21) via a sealing gasket (32); A roller (33) is rotatably arranged at the lower end of the slide bar (31), and the periphery of the roller (33) is rollingly connected to the periphery of the fixed curved ring (1); A reset baffle (34) is arranged on the periphery of the slide bar (31), and the reset baffle (34) is elastically connected to the inner ring of the rotating ring (2) via a reset spring (35).

3. A continuous extrusion molding device according to claim 1, characterized in that: The fixed curved surface ring (1) is fixedly sleeved in the box body (4), the rotating ring (2) is rotatably sleeved in the box body (4), and a positioning sprocket (5) is arranged at one end of the rotating ring (2), and an external power can drive the positioning sprocket (5) to rotate.

4. A continuous extrusion molding device according to claim 3, characterized in that: A pressing baffle (6) is installed in the box body (4), and the pressing baffle (6) is located on one side of the rotating ring (2), and one side of the pressing baffle (6) is used to cover the opening of the forming hole (21).

5. A continuous extrusion molding device according to claim 4, characterized in that: The cross section of the clamping baffle (6) is an arc-shaped structure, the inner side of the clamping baffle (6) is close to the periphery of the rotating ring (2), and a plurality of sealing plates (61) are arranged on the periphery of the clamping baffle (6), and one end of the sealing plate (61) is used to cover the opening of the forming hole (21).

6. A continuous extrusion molding device according to claim 5, characterized in that: One end of each blocking plate (61) is rotatably connected to the chain (62), and the positioning sprocket (5) can drive the chain (62) to move.

7. A continuous extrusion molding device according to claim 6, characterized in that: Each of the formed holes (21) is located between two adjacent chain teeth (51) on the positioning sprocket (5), and one end of each of the blocking plates (61) is sleeved on a pin shaft (621) of the chain (62).

8. A continuous extrusion molding device according to claim 4, characterized in that: Both ends of the clamping baffle (6) are rotatably connected to the driven sprocket (63), and the chain (62) is meshed with the periphery of each driven sprocket (63).

9. A continuous extrusion molding device according to claim 1, characterized in that: The outer contour of the fixed curved surface ring (1) comprises a suction zone (11), a compression zone (12), an ejection zone (13) and a holding zone (14) which are arranged in sequence, and the suction zone (11), the compression zone (12), the ejection zone (13) and the holding zone (14) are all continuous curved segments, the outer diameter from the suction zone (11) to the compression zone (12) gradually decreases, the outer diameter from the compression zone (12) and the ejection zone (13) to the holding zone (14) gradually increases, and the outer diameter of the holding zone (14) remains unchanged.

10. A continuous extrusion molding device according to claim 9, characterized in that: The box body (4) is provided with an inlet (41) and an outlet (42), respectively; the suction zone (11) is located below the inlet (41), the ejection zone (13) is located above the outlet (42), the compression zone (12) is located on a side close to the compression baffle (6), and the holding zone (14) is located on a side away from the compression baffle (6).

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