Full-automatic rubber open mill for dust recycling
The fully automatic rubber mixing mill's sealing and dust recovery system solves the problems of uneven powder addition and scattering, achieving precise powder delivery and efficient recovery, thereby improving the quality of rubber products and reducing production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-27
- Publication Date
- 2026-04-14
AI Technical Summary
Small and medium-sized rubber production enterprises face problems such as dust scattering, inaccurate dosage, environmental pollution, and raw material waste when adding powder on open mills. Traditional automated equipment is too expensive to be widely adopted.
A fully automatic rubber open mill was designed, which adopts a sealed protective cover and a powder recovery mechanism driven by a negative pressure fan. Combined with a variable speed roller and a turning ring, it can achieve precise powder feeding and recovery. The silicone sheet and negative pressure fan ensure uniform powder mixing, and closed-loop recovery is achieved by using a recovery flat tube and connecting hose.
It enables precise addition and efficient recovery of powder, improves the performance stability of rubber products, reduces production costs, and improves the working environment.
Smart Images
Figure CN121848550A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of rubber open mill technology, specifically a fully automatic rubber open mill for dust recycling. Background Technology
[0002] Rubber mixing is a core process in the production of rubber products. Its purpose is to uniformly mix raw rubber with various powdered compounding agents (such as carbon black, silica, zinc oxide, vulcanizing agents, etc.) to impart the required mechanical properties, aging resistance, wear resistance and other key characteristics to the rubber products. During the mixing process, open mills are widely used in the production and processing of various rubber products due to their simple structure and flexible operation.
[0003] In existing technologies, when using an open mill to mix rubber, it is often necessary to add powder inside the rubber so that the powder can be fully combined with the rubber under the shearing and extrusion action of the two rollers of the open mill. However, most small and medium-sized rubber production enterprises still use the manual powder addition operation mode. The specific operation process is as follows: the operator holds a bucket containing powder and sprinkles the powder into the rubber compound wrapped around the rollers in batches above the rollers of the open mill. Then, the powder and rubber are mixed by cutting rubber and making triangular wraps.
[0004] Meanwhile, traditional open mills are generally open structures with no effective sealing or protection devices in the working area of the rollers. During manual feeding, due to the lightweight nature of the powder and the airflow disturbance generated by the rotation of the open mill rollers, a large amount of powder cannot be adsorbed by the rubber compound in time and will be scattered into the surrounding environment. This powder scattering phenomenon brings about many technical defects: First, the accuracy of the actual addition of powder is difficult to control. The loss due to scattering results in the actual content of powder in the rubber compound being lower than the design value of the formula, which directly disrupts the formula balance of the rubber compound and thus affects the key properties of rubber products such as tensile strength, hardness, and abrasion resistance, causing fluctuations in product quality. Second, the utilization rate of raw materials has been greatly reduced, and the scattered powder cannot be recycled, which increases the raw material procurement costs of enterprises. Third, the working environment is severely polluted. The flying powder permeates the air in the workshop, which not only damages the respiratory tract of operators, but also adheres to the surface of workshop equipment, accelerating the wear and corrosion of the equipment and shortening its service life.
[0005] Although some large enterprises have introduced automated feeding equipment, such equipment is often complex in structure and has high initial investment costs, making it difficult to popularize and promote in small and medium-sized enterprises. Therefore, in order to address the technical pain points of manual feeding in traditional open mills, such as dust scattering and dosage loss, it is of great significance to develop a powder addition structure that combines sealing protection and dust recovery functions. This is of great significance for improving the stability of rubber compounding quality, reducing production costs, and improving the working environment. Summary of the Invention
[0006] Based on this, the purpose of the present invention is to provide a fully automatic rubber mixing mill for dust recycling, so as to solve the technical problems mentioned in the background art.
[0007] To achieve the above objectives, the present invention provides the following technical solution: a fully automatic rubber mixing mill for dust recycling, comprising a main body for support and installation, a first roller and a second roller rotatably connected inside the main body for rubber mixing, a protective cover covering the outside of the first roller and the second roller, a flip-top opening and closing cover that cooperates with the protective cover to achieve sealing and opening, a powder recycling mechanism for powder feeding and recycling, and a transmission mechanism for driving the protective cover to slide back and forth. The flip-top opening and closing cover is hinged to the protective cover via a hinged seat, and the maximum flip angle of the flip-top opening and closing cover is 120°; The first roller and the second roller are driven by independent power components, and the rotational speed of the first roller is greater than that of the second roller. The second roller is connected to the main body through an adjustment mechanism to adjust the distance between the first roller and the second roller; The powder recovery mechanism includes a powder box for storing powder, a negative pressure fan for providing airflow power, a "V"-shaped silicone sheet at the bottom of the powder box and a sealing cover. The silicone sheet is provided in two sets and is closed to each other in its natural state, but can be opened relative to each other under the action of airflow generated by the negative pressure fan. Multiple negative pressure fans are provided, and each is connected to a powder box and a horn-shaped connecting pipe respectively. The transmission mechanism includes a lead screw and a connecting slider. The connecting slider is fixedly connected to the protective cover, and the lead screw is connected to the power component. Two sets of the connecting sliders are symmetrically sleeved on the lead screw and reciprocate synchronously sliding with the rotation of the lead screw. The inner walls of the protective cover are fixed with two turning rings that are sleeved on the outside of the first roller and the second roller. There are two sets of turning rings, which are adapted to the first roller and the second roller respectively and slide back and forth synchronously with the protective cover, so as to turn and stack the rubber in the mixing process. The powder recovery mechanism is connected to the recovery flat tube through a flared connecting pipe and a connecting hose. The main body is provided with a bottom receiving plate located below the first roller and the second roller. The bottom end of the recovery flat tube is provided with a flared plate to realize the functions of precise powder feeding, efficient rubber mixing and closed-loop dust recovery. The bottom opening of the recycled flat tube faces the bottom receiving plate, and the flared plate expands outward in a trumpet shape. The bottom receiving plate is inclined, and its lowest point corresponds to the bottom opening of the recycling flat tube.
[0008] In summary, the present invention has the following main beneficial effects: This invention addresses the problems of dust scattering, dosage loss, raw material waste, and environmental pollution associated with manual feeding in traditional open mixing mills. Through integrated structural designs incorporating sealing protection, automatic feeding, dust recovery, and optimized rubber turning, it achieves multiple technological breakthroughs: First, by utilizing a powder box and a "V"-shaped silicone sheet, combined with a negative pressure fan driving the feeding, it ensures precise powder delivery to the mixing area, avoiding uneven distribution and scattering losses common in manual feeding, thus guaranteeing a balanced rubber compound formulation and improving the performance stability of rubber products. Second, the recovery system, consisting of a negative pressure fan, a recovery flat tube, and connecting hoses, along with a bottom receiving plate and a flared plate, efficiently recovers uncombined scattered powder for reuse, significantly improving raw material utilization and reducing production costs. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the overall closed state of the present invention; Figure 2 This is a closed sectional view of the entire invention. Figure 3 For the present invention Figure 2 Enlarged view of point A; Figure 4 For the present invention Figure 2 Enlarged view of point B; Figure 5 This is a schematic diagram of the overall open state of the present invention; Figure 6 This is a partial structural diagram of the present invention in its open state; Figure 7 For the present invention Figure 6 Enlarged view of point C; Figure 8 This is an exploded and enlarged view of part of the structure of the present invention; Figure 9 This is a schematic diagram of the assembly of the first roller, the second roller, and the flipping ring of the present invention; Figure 10 This is a schematic diagram of the structure of the protective cover of the present invention.
[0010] In the diagram: 1. Main body; 2. First roller; 3. Second roller; 4. Protective cover; 5. Tilting ring; 6. Tilting opening and closing cover; 7. Powder recovery mechanism; 701. Powder box; 702. Negative pressure fan; 703. Silicone sheet; 704. Sealing cover; 8. Transmission mechanism; 801. Lead screw; 802. Connecting slider; 9. Trumpet-shaped connecting pipe; 10. Connecting hose; 11. Recovery flat pipe; 12. Bottom receiving plate; 13. Flared plate; 14. Hinge seat. Detailed Implementation
[0011] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.
[0012] The embodiments of the present invention will now be described.
[0013] Example 1 like Figure 1-10 As shown in the figure, this embodiment discloses a fully automatic rubber mixing mill for dust recycling. Its specific structure and working process are as follows, which aims to clearly demonstrate the assembly relationship and functional implementation logic of the equipment. The fully automatic rubber mixing mill for dust recycling in this embodiment includes a main body 1, a first roller 2, a second roller 3, a protective cover 4, a turning ring 5, a flipping opening and closing cover 6, a powder recycling mechanism 7, a transmission mechanism 8, a bell-mouth connecting pipe 9, a connecting hose 10, a recycling flat pipe 11, a bottom receiving plate 12, a flared plate 13, and a hinge seat 14. The first roller 2 and the second roller 3 are rotatably connected to the interior of the main body 1, and are arranged in parallel to form a working area for rubber mixing. The second roller 3 is connected to the main body 1 through an adjustment mechanism, and its spacing relative to the first roller 2 can be adjusted. A protective cover 4 is installed on the outside of the first roller 2 and the second roller 3. Two sets of flipping rings 5 are fixedly installed at both ends of the inner wall of the protective cover 4. The two sets of flipping rings 5 are respectively sleeved on the outside of the first roller 2 and the second roller 3, and a fitting gap is reserved between them and the outer wall of the rollers. The flip-top cover 6 is hinged to the protective cover 4 via the hinge seat 14, and can be flipped relative to the protective cover 4 to open and close the working area; the powder recovery mechanism 7 includes a powder box 701, a negative pressure fan 702, a silicone sheet 703 and a sealing cover 704. The powder box 701 is installed above the flip-top cover 6, the sealing cover 704 is closed on the top opening of the powder box 701, and two sets of “V” shaped silicone sheets 703 are fixed at the bottom discharge port of the powder box 701. The transmission mechanism 8 consists of a lead screw 801 and a connecting slider 802. The lead screw 801 is rotatably connected to the main body 1. Two sets of connecting sliders 802 are symmetrically sleeved on the lead screw 801, and the connecting sliders 802 are fixedly connected to the protective cover 4. The powder box 701 is connected to one end of the connecting hose 10 through the flared connecting pipe 9. The other end of the connecting hose 10 is connected to the recovery flat tube 11. The bottom end of the recovery flat tube 11 is equipped with a flared plate 13. The bottom receiving plate 12 is fixed inside the main body 1 and is located below the first roller 2 and the second roller 3. The bottom opening of the recovery flat tube 11 faces the bottom receiving plate 12. The first roller 2 and the second roller 3 are driven by independent power components. Multiple sets of negative pressure fans 702 are installed corresponding to the powder box 701 and the flared mouth connecting pipe 9, respectively. The lead screw 801 is connected to another set of power components for transmission.
[0014] The working principle of this invention is as follows: When in use, the power is turned on, and the first roller 2 and the second roller 3 are rotatably connected inside the main body 1. The distance between the second roller 3 and the first roller 2 can be adjusted by the adjustment mechanism. That is to say, the gap between the first roller 2 and the second roller 3 can be adjusted to adapt to different degrees of rubber mixing. The first roller 2 and the second roller 3 are driven to rotate by a power assembly on one side. By making the rotation speed of the first roller 2 greater than that of the second roller 3, the rubber in the mixing process can be mainly wrapped around the outer wall of the first roller 2 for mixing. When it is necessary to perform rubber mixing, the operator manually opens the flip-top cover 6 relative to the protective cover 4. At this time, the maximum flip angle of the flip-top cover 6 is 120°, which exposes the working area between the first roller 2 and the second roller 3. The operator can then place the rubber to be mixed between the first roller 2 and the second roller 3. Then, flip the opening and closing cover 6 to close relative to the protective cover 4. At this time, the staff manually opens the sealing cover 704 on the top of the powder box 701 of the powder recovery mechanism 7. The staff can put the powder to be added into the space of the powder box 701, and then close the sealing cover 704. At this time, since the bottom of the powder box 701 is fixed with two sets of silicone sheets 703 in a “V” structure, the silicone sheets 703 are in a closed state when they are not subjected to external force. Therefore, the powder will not pass through the two sets of silicone sheets 703 and enter between the first roller 2 and the second roller 3. In other words, no powder addition operation is performed in the initial state. When the first roller 2 and the second roller 3 first mix the rubber to a certain extent, another set of power components is started. At this time, the power components drive the transmission mechanism 8 to run. The lead screw 801 of the transmission mechanism 8 drives the two sets of connecting sliders 802 to reciprocate synchronously under the rotational power. Furthermore, the two sets of connecting sliders 802 can drive the protective cover 4, the two sets of flipping rings 5, the flipping opening and closing cover 6, the powder recovery mechanism 7, the flared mouth connecting pipe, the connecting hose 10, and the recovery flat pipe 11 to slide synchronously back and forth. At this time, the two sets of turning rings 5 will slide back and forth along the outer wall of the first roller 2 and the second roller 3. That is to say, when the first roller 2 and the second roller 3 are mixing the rubber, the two sets of turning rings 5 can turn and stack the rubber to further improve the mixing effect of the rubber. When the rubber mixing reaches the powder feeding time, multiple sets of negative pressure fans 702 are started. The airflow generated by the rotation of the negative pressure fans 702 can blow into the powder box 701. The two sets of silicone sheets 703 will open to a certain extent under the action of the airflow, so that the powder enters the rubber between the first roller 2 and the second roller 3. As the first roller 2 and the second roller 3 perform the mixing operation on the rubber, the powder will be wrapped by the rubber and the mixing operation will be carried out. During the mixing process, some powder cannot effectively combine with the rubber, and the powder that is difficult to combine will fall onto the bottom receiving plate 12. At the same time, multiple sets of negative pressure fans 702 will generate negative pressure suction through the horn-mouth connecting pipe 9, the connecting hose 10 and the recovery flat pipe 11 in sequence. The bottom opening of the recovery flat pipe 11 is located at the top of the bottom receiving plate 12. Under the action of the flared plate 13, the recovery flat pipe 11 can effectively suck up and recover the powder on the bottom receiving plate 12 into the powder box 701. The recovery flat tube 11 will slide back and forth with the protective cover 4, and the recovery flat tube 11 will better pick up the powder on the bottom receiving plate 12 when it slides back and forth. In summary, by setting up a sealed powder box and an airflow-driven feeding structure, the powder falls precisely into the rubber mixing area from the gap of the closed silicone sheet under the action of negative pressure airflow. This avoids the problems of uneven powder distribution and scattering loss when manually feeding, ensuring that the actual powder content in the rubber compound is consistent with the formula design value, and effectively maintaining the balance of the rubber compound formula. The design of rotating the first and second rollers at different speeds, along with the tumbling and stacking effect of the reciprocating sliding tumbling ring on the rubber, allows the powder to be uniformly incorporated into the rubber matrix under the synergistic effect of shearing, extrusion and tumbling. This significantly reduces the fluctuation of product performance caused by uneven powder dispersion and improves the key mechanical properties of rubber products, such as tensile strength, hardness and wear resistance. Meanwhile, relying on the dust collection system composed of negative pressure fan, flared connecting pipe, connecting hose and recovery flat pipe, it can efficiently adsorb and recover the powder that is not adsorbed by rubber during the mixing process and falls to the bottom receiving plate. The recovered powder is directly returned to the powder box to participate in the mixing again, realizing the closed-loop recycling of powder raw materials, greatly improving the raw material utilization rate and reducing powder waste. Compared to the powder loss pattern of traditional open mills, this invention effectively reduces the raw material procurement costs for enterprises, and is especially suitable for the use of high-priced powder additives such as carbon black and silica. Long-term use can significantly reduce the overall production cost.
[0015] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.
Claims
1. A fully automatic rubber mixing mill for dust recycling, characterized in that: It includes a main body (1) for supporting installation, a first roller (2) and a second roller (3) rotatably connected inside the main body (1) and used for rubber mixing, a protective cover (4) covering the outside of the first roller (2) and the second roller (3), a flip-top opening and closing cover (6) that cooperates with the protective cover (4) to achieve sealing opening and closing, a powder recycling mechanism (7) for powder feeding and recycling, and a transmission mechanism (8) for driving the protective cover (4) to slide back and forth. The powder recovery mechanism (7) includes a powder box (701) for storing powder, a negative pressure fan (702) for providing airflow power, a "V" shaped silicone sheet (703) and a sealing cover (704) located at the bottom of the powder box (701). The transmission mechanism (8) includes a lead screw (801) and a connecting slider (802). The connecting slider (802) is fixedly connected to the protective cover (4). The inner walls of the protective cover (4) are fixed with flipping rings (5) sleeved on the outside of the first roller (2) and the second roller (3). The powder recovery mechanism (7) is connected to the recovery flat tube (11) through the flared mouth connecting pipe (9) and the connecting hose (10). The main body (1) is provided with a bottom receiving plate (12) located below the first roller (2) and the second roller (3). The bottom end of the recovery flat tube (11) is provided with a flared plate (13) to realize the functions of precise powder delivery, efficient rubber mixing and closed-loop dust recovery.
2. The fully automatic rubber mixing mill for dust recycling according to claim 1, characterized in that: The first roller (2) and the second roller (3) are driven by independent power components, and the rotational speed of the first roller (2) is greater than that of the second roller (3); The second roller (3) is connected to the main body (1) through an adjustment mechanism to realize the adjustment of the distance between the first roller (2) and the second roller (3).
3. The fully automatic rubber mixing mill for dust recycling according to claim 1, characterized in that: The flip-opening cover (6) is hinged to the protective cover (4) via a hinge seat (14), and the maximum flip angle of the flip-opening cover (6) is 120°.
4. The fully automatic rubber mixing mill for dust recycling according to claim 1, characterized in that: The silicone sheet (703) is provided in two sets and is closed to each other in its natural state, but can be opened relative to each other under the action of airflow generated by the negative pressure fan (702).
5. The fully automatic rubber mixing mill for dust recycling according to claim 1, characterized in that: The lead screw (801) is connected to the power component for transmission, and the two sets of connecting sliders (802) are symmetrically sleeved on the lead screw (801) and slide back and forth synchronously with the rotation of the lead screw (801).
6. The fully automatic rubber mixing mill for dust recycling according to claim 1, characterized in that: The turning ring (5) is provided in two sets, which are adapted to the first roller (2) and the second roller (3) respectively and slide back and forth synchronously with the protective cover (4), so as to turn and stack the rubber in the mixing process.
7. The fully automatic rubber mixing mill for dust recycling according to claim 1, characterized in that: The bottom opening of the recycling flat tube (11) faces the bottom receiving plate (12), and the flared plate (13) expands outward in a trumpet shape; The bottom receiving plate (12) is inclined, and its lowest end corresponds to the bottom opening of the recycling flat tube (11).
8. The fully automatic rubber mixing mill for dust recycling according to claim 1, characterized in that: The negative pressure fan (702) is provided in multiple sets, and is respectively set with the powder box (701) and the horn-mouth connecting pipe (9).