A degreasing mesh belt automatic tensioning structure for continuous degreasing sintering furnace

Abstract

The present invention discloses an automatic tensioning structure for a degreasing mesh belt used in a continuous degreasing sintering furnace, which relates to the technical field of tensioning structures, and includes a first smooth roller, an internal rocker arm, a second smooth roller and an elastic mechanism; the first smooth roller is rotatably arranged below the degreasing mesh belt, one end of the internal rocker arm is connected to the rotating shaft of the first smooth roller; the other end of the internal rocker arm is connected to the rotating shaft of the second smooth roller; one end of the elastic mechanism is fixed to the box of the continuous degreasing sintering furnace, and the other end of the elastic mechanism is connected to the rotating shaft of the first smooth roller. This automatic tensioning structure can ensure that the degreasing mesh belt is always in a taut state when the temperature rises, so that the mesh belt runs smoothly; when the temperature drops to a cold state, the equipment is restored to its original state. The tensioning spring is located outside the box, and the tensioning force of the mesh belt can be adjusted at any time. A mesh belt tensioning stop rod and a mesh belt tensioning rocker arm limit rod are provided outside the box to control the movement amplitude of the internal tensioning roller.

Description

Technical Field

[0001] This invention relates to the field of tensioning structure technology, and in particular to an automatic tensioning structure for a degreasing mesh belt used in a continuous degreasing sintering furnace. Background Technology

[0002] Continuous debinding and sintering furnaces are one of the main pieces of equipment used in metal injection molding (MIM) processes. The stability of the continuous debinding and sintering furnace's operation is crucial for product quality and production efficiency. The main areas where operational instability issues arise during production are the debinding section, the transverse conveyor section, and the sintering section. The primary reason for unstable mesh belt operation in the debinding section is that as the furnace heats up, the mesh belt length increases, leading to loosening and a reduction in the number of meshing points between the drive roller rack and mesh belt. This results in mesh belt skipping, boat jamming, and other phenomena, causing unstable boat movement, product displacement within the boat, surface cracks, and even breakage, ultimately affecting product yield. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides an automatic tensioning structure for a degreasing mesh belt in a continuous degreasing sintering furnace. When the degreasing mesh belt is heated and elongated, it can automatically compensate for the elongation of the mesh belt, keeping the mesh belt in a taut state at all times, ensuring stable operation of the mesh belt and improving the yield of product production. When the degreasing mesh belt is cooled and shrunken, this device can automatically compensate for the shrinkage of the mesh belt and restore it to its initial state.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] This invention provides an automatic tensioning structure for a degreasing mesh belt in a continuous degreasing sintering furnace, comprising a first smooth roller, an internal rocker arm, a second smooth roller, and an elastic mechanism; the first smooth roller is rotatably disposed below the degreasing mesh belt, one end of the internal rocker arm is connected to the rotating shaft of the first smooth roller, and the other end of the internal rocker arm is connected to the rotating shaft of the second smooth roller; one end of the elastic mechanism is fixed to the housing of the continuous degreasing sintering furnace, and the other end of the elastic mechanism is connected to the rotating shaft of the first smooth roller.

[0006] Optionally, the elastic mechanism includes an elastic element and an external rocker arm; one end of the elastic element is connected to the housing of the continuous degreasing sintering furnace, the other end of the elastic element is connected to one end of the external rocker arm, and the other end of the external rocker arm is connected to the shaft of the first smooth roller.

[0007] Optionally, the elastic mechanism further includes a tensioning base, a nut, a screw, and a connector; the tensioning base is connected to the housing of the continuous degreasing sintering furnace, one end of the screw passes through the tensioning base, the nut is disposed on the screw and located on the tensioning base, one end of the connector is connected to the end of the screw, and the other end of the connector is connected to one end of the elastic element.

[0008] Optionally, the elastic element is a helical spring.

[0009] Optionally, a limiting rod is also provided at the end of the shaft of the first smooth roller. One end of the limiting rod is connected to the shaft of the first smooth roller, and the axis of the limiting rod is perpendicular to the axis of the shaft of the first smooth roller. A stop rod is also provided on the box of the continuous degreasing sintering furnace. The stop rod is used to limit the maximum and minimum height of the limiting rod.

[0010] Optionally, the stop rod is located outside the casing of the continuous degreasing sintering furnace.

[0011] Optionally, an internal rocker arm is provided at each end of the first smooth roller on the shaft of the first smooth roller.

[0012] Optionally, the elastic mechanism is disposed outside the casing of the continuous degreasing sintering furnace.

[0013] The present invention achieves the following technical effects compared to the prior art:

[0014] 1. Based on the principle of thermal expansion and contraction, the length of the conveyor belt increases when the furnace is heated. This device compensates for the elongation of the conveyor belt in the degreasing section, achieving automatic tensioning of the conveyor belt. When cooling, the conveyor belt contracts, causing the smooth rollers to swing downwards, returning to the state before cooling and protecting the equipment.

[0015] 2. The tension spring is located outside the housing, and the tension of the conveyor belt can be adjusted at any time.

[0016] 3. A mesh belt tensioning stop rod and a mesh belt tensioning rocker arm limit rod are provided on the outside of the box to control the movement range of the internal tensioning rollers.

[0017] 4. When the mesh belt moves, the smooth rollers always follow and roll, which will not cause friction on the mesh belt and avoid damage caused by mesh belt wear. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the automatic tensioning structure of the degreasing mesh belt for a continuous degreasing sintering furnace according to the present invention;

[0020] Figure 2 This is a schematic diagram of the degreasing mesh belt drive roller for a continuous degreasing sintering furnace according to the present invention;

[0021] Figure 3 This is a schematic diagram of the automatic tensioning structure of the degreasing mesh belt for a continuous degreasing sintering furnace of the present invention in both cold and hot states;

[0022] Figure 4 This is a schematic diagram of the elastic mechanism in the automatic tensioning structure of the degreasing mesh belt for a continuous degreasing sintering furnace of the present invention in both cold and hot states;

[0023] Figure 5 This is a schematic diagram of the stop rod and limit rod of the automatic tensioning structure of the degreasing mesh belt for continuous degreasing sintering furnace of the present invention;

[0024] Figure 6 This is a schematic diagram of the installation of the automatic tensioning structure for the degreasing mesh belt in a continuous degreasing sintering furnace according to the present invention.

[0025] Explanation of reference numerals in the attached drawings: 1. First smooth roller; 2. Internal rocker arm; 3. External rocker arm; 4. Elastic element; 5. Joint; 6. Screw; 7. Nut; 8. Tensioning base; 9. Second smooth roller; 10. Stop rod; 11. Limiting rod; 12. Bearing seat; 13. Rack roller; 14. Sprocket; 15. Housing; 16. Degreasing mesh belt; 17. Position of the second smooth roller in hot state; 18. Position of the second smooth roller in cold state. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] like Figures 1 to 6As shown, this embodiment provides an automatic tensioning structure for a degreasing mesh belt in a continuous degreasing sintering furnace, including a first smooth roller 1, an internal rocker arm 2, a second smooth roller 9, and an elastic mechanism. The first smooth roller 1 is rotatably disposed below the degreasing mesh belt 16, and an internal rocker arm 2 is respectively disposed at both ends of the first smooth roller 1 on its rotating shaft. One end of the internal rocker arm 2 is connected to the rotating shaft of the first smooth roller 1; the other end of the internal rocker arm 2 is connected to the rotating shaft of the second smooth roller 9; one end of the elastic mechanism is fixed to the housing 15 of the continuous degreasing sintering furnace, and the other end of the elastic mechanism is connected to the rotating shaft of the first smooth roller 1.

[0028] In this specific embodiment, the elastic mechanism includes an elastic element 4, an external rocker arm 3, a tensioning base 8, a nut 7, a screw 6, and a connector 5. The tensioning base 8 is connected to the housing 15 of the continuous degreasing sintering furnace. One end of the screw 6 passes through the tensioning base 8. The nut 7 is disposed on the screw 6 and located on the tensioning base 8. One end of the connector 5 is connected to the end of the screw 6, and the other end of the connector 5 is connected to one end of the elastic element 4. The other end of the elastic element 4 is connected to one end of the external rocker arm 3, and the other end of the external rocker arm 3 is connected to the rotating shaft of the first smooth roller 1. In this embodiment, the elastic element 4 is a helical spring.

[0029] A limiting rod 11 is also provided at the end of the shaft of the first smooth roller 1. One end of the limiting rod 11 is connected to the shaft of the first smooth roller 1, and the axis of the limiting rod 11 is perpendicular to the axis of the shaft of the first smooth roller 1. A stop rod 10 is also provided on the box 15 of the continuous degreasing sintering furnace. The stop rod 10 is used to limit the maximum and minimum height of the limiting rod 11. More specifically, two stop rods 10 are provided on the virtual circumference of the box 15 of the continuous degreasing sintering furnace with the shaft of the first smooth roller 1 as the center. These two stop rods 10 are used to limit the movement range of the limiting rod 11, thereby controlling the movement range of the internal rocker arm. The maximum height of the limiting rod 11 is used to prevent the second smooth roller 9 from being too high, causing the lower degreasing mesh belt 16 to touch the upper degreasing mesh belt 16. The minimum height of the limiting rod 11 is used to prevent the second smooth roller 9 from being too low, causing interference with other parts in the lower part of the box 15.

[0030] To facilitate control of the movement amplitude of the tensioning roller, the stop rod 10 is located outside the housing 15 of the continuous degreasing sintering furnace.

[0031] To facilitate adjustment of the tension, the elastic mechanism is located outside the housing 15 of the continuous degreasing sintering furnace.

[0032] In this embodiment, the automatic tensioning structure of the degreasing mesh belt for the continuous degreasing sintering furnace is located in the tail box 15 of the degreasing section, and the degreasing mesh belt 16 interlocks with the surface of the rack and pinion roller 13. When the equipment is running according to its original structure, the degreasing mesh belt 16 above the rack and pinion roller 13 is always in a taut state. When hot, the mesh belt below the rack and pinion roller 13 loosens, and the number of engagements between the degreasing mesh belt 16 and the rack and pinion roller 13 decreases. The function of the tensioning mechanism is to ensure the engagement between the rack and pinion roller 13 and the degreasing mesh belt 16.

[0033] When the degreasing mesh belt 16 is in a cold state, the screw 6 is lifted upward by the nut 7 on the tensioning base 8, the spring extends, and a pulling force is generated on the external rocker arm 3. The internal second smooth roller 9 moves upward and contacts the degreasing mesh belt 16, generating a pre-tension force on the degreasing mesh belt 16.

[0034] During the heating process, as the temperature rises, the length of the degreasing mesh belt 16 increases while the spring contracts. The second smooth roller 9 lifts the degreasing mesh belt 16 upward to compensate for the elongation of the degreasing mesh belt 16, thereby achieving automatic tensioning of the degreasing mesh belt 16.

[0035] During the transition from a hot to a cold state, as the temperature decreases, the conveyor belt contracts, causing the smooth rollers to swing downwards and return to their pre-heating state, thus protecting the equipment.

[0036] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A degreasing mesh belt automatic tensioning structure for a continuous degreasing sintering furnace, characterized in that: It comprises a first smooth roller, an internal rocker arm, a second smooth roller and an elastic mechanism; the first smooth roller is rotatably arranged below the degreasing mesh belt, one end of the internal rocker arm is connected to the rotating shaft of the first smooth roller; the other end of the internal rocker arm is connected to the rotating shaft of the second smooth roller; one end of the elastic mechanism is fixed to the box body of the continuous degreasing sintering furnace, and the other end of the elastic mechanism is connected to the rotating shaft of the first smooth roller; The elastic mechanism includes an elastic member and an external rocker arm; one end of the elastic member is connected to the box body of the continuous degreasing and sintering furnace, the other end of the elastic member is connected to one end of the external rocker arm, and the other end of the external rocker arm is connected to the rotating shaft of the first smooth roller; A limiting rod is also provided at the end of the rotating shaft of the first smooth roller, one end of the limiting rod is connected to the rotating shaft of the first smooth roller, and the axis of the limiting rod is perpendicular to the axis of the rotating shaft of the first smooth roller. A stop rod is also provided on the box body of the continuous degreasing sintering furnace, and the stop rod is used to limit the movement range of the first smooth roller; The stop rod is arranged outside the box body of the continuous degreasing and sintering furnace, and the limiting rod is arranged outside the box body of the continuous degreasing and sintering furnace; An internal rocker arm is disposed on the rotating shaft of the first smooth roller at both ends of the first smooth roller; one end of the internal rocker arm is connected to the rotating shaft of the first smooth roller; and the other end of the internal rocker arm is connected to the rotating shaft of the second smooth roller; The elastic mechanism is arranged outside the box body of the continuous degreasing and sintering furnace.

2. The automatic tensioning structure of the degreasing mesh belt for a continuous degreasing sintering furnace according to claim 1 is characterized in that: The elastic mechanism also includes a tensioning base, a nut, a screw and a joint; the tensioning base is connected to the box of the continuous degreasing and sintering furnace, one end of the screw passes through the tensioning base, the nut is arranged on the screw and located on the tensioning base, one end of the joint is connected to the end of the screw, and the other end of the joint is connected to one end of the elastic member.

3. The automatic tensioning structure of the degreasing mesh belt for a continuous degreasing sintering furnace according to claim 1 is characterized in that: The elastic member is a coil spring.

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