Compression molding and packaging device for plant fibers

Abstract

The utility model discloses a compression molding and packaging device for plant fibers, and relates to the technical field of compression packaging. The device comprises a shell, a pressing bin is formed in the shell, a U-shaped shaping mold is slidably connected to the interior of the pressing bin, a lifting bin is formed in the top of the pressing bin, a pressing plate is slidably connected to the interior of the lifting bin, a hydraulic push rod is fixedly connected to the top of the shell, and the output end of the hydraulic push rod penetrates through the shell and is fixedly connected with the pressing plate. After a hydraulic push rod is started to drive a pressing plate to press fiber raw materials in a U-shaped shaping mold, the U-shaped shaping mold can be driven by reversely starting the hydraulic push rod to drive the pressed raw materials to move to the top of a conveying belt in the length direction of a pressing bin; and then a discharging motor is started to drive a conveying roller to be matched with a conveying belt to discharge the fiber raw materials pressed in the U-shaped shaping mold out of the pressing bin, so that the pressing and discharging process of the fiber raw materials is effectively reduced, and the pressing efficiency of the fiber raw materials is improved.

Description

Technical Field

[0001] The present application relates to the field of compression packaging, and in particular to a compression molding packaging device for plant fibers. Background Art

[0002] With the increasing environmental awareness and the advancement of sustainable development strategies around the world, plant fibers, as a renewable and degradable natural material, have received extensive attention and application. Plant fibers have shown great application potential in packaging, textiles, papermaking and other fields due to their unique physical properties and biodegradability.

[0003] Plant fibers need to be compressed and packaged when they need to be fixed in shape, reduced in volume, or convenient for transportation. Compression and packaging can ensure that the plant fibers maintain a stable shape and structure during subsequent use or treatment, which is convenient for subsequent processing or utilization.

[0004] The traditional method of pressing and molding plant fibers is a multi-step and delicate process, including loading, pressing and demolding. In this process, the raw materials are carefully poured into the mold, and then the key actuator, the hydraulic rod, plays a vital role. Through the precise drive of the hydraulic rod, the raw materials are tightly pressed together to form a solid molded product. However, in the traditional pressing process, the three key links of loading, pressing and demolding are driven by different components. This decentralized drive method not only increases the complexity of the process, but also leads to a decrease in pressing efficiency. Utility Model Content

[0005] The purpose of this application is to solve the problem that in the traditional pressing process, the three key links of feeding, pressing and demoulding are driven by different components. This decentralized driving method not only increases the complexity of the process, but also leads to a decrease in pressing efficiency. This application provides a pressing and forming packaging device for plant fibers.

[0006] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions:

[0007] A pressing and forming packaging device for plant fiber comprises a shell, a pressing bin is provided inside the shell, a U-shaped shaping die is slidably connected inside the pressing bin, a lifting bin is provided on the top of the pressing bin, a pressing plate is slidably connected inside the lifting bin, a hydraulic push rod is fixedly connected to the top of the shell, an output end of the hydraulic push rod passes through the shell and is fixedly connected to the pressing plate, a feed port connected to the lifting bin is provided at one end of the shell, a guide slide groove connected to the pressing bin is symmetrically provided on one side of the shell, a guide slider is symmetrically fixedly connected to one end of the U-shaped shaping die, and the guide slider is slidably connected to the guide slider. A guide slide rod is slidably passed through one end of the guide slider toward the inside of the slide groove, and a transmission plate is fixedly connected to one end of the two guide slide rods. A discharge trough is provided at the bottom of the pressing bin, and a transmission roller is symmetrically and rotatably connected inside the discharge trough. A transmission belt is sleeved on one end of the two transmission rollers, and a unloading motor is fixedly connected to one side of the shell, and the output end of the unloading motor is fixedly connected to a transmission roller. A discharge port adapted to a U-shaped forming mold is provided on one side of the shell, and the discharge port is arranged above the discharge trough, and a transmission mechanism for driving the transmission plate to move along the length direction of the guide slide rod is installed at one end of the shell.

[0008] By adopting the above technical scheme, by setting up the transmission mechanism and the coordinated use with the U-shaped shaping mold, the lifting bin and the pressing plate, it is convenient to start the hydraulic push rod to drive the pressing plate to complete the pressing of the fiber raw material inside the U-shaped shaping mold, and then start the hydraulic push rod in the reverse direction to drive the U-shaped shaping mold to drive the pressed raw material to move along the length direction of the pressing bin to the top of the conveyor belt, and then start the unloading motor to drive the transmission roller to cooperate with the conveyor belt to discharge the fiber raw material pressed inside the U-shaped shaping mold into the pressing bin, thereby effectively reducing the pressing and discharging process of the fiber raw material and improving the pressing efficiency of the fiber raw material.

[0009] Furthermore, the transmission mechanism includes a lifting slide slot opened on one side of the lifting bin, a transmission rack 1 is slidably connected inside the lifting slide slot, one end of the transmission rack 1 passes through the lifting slide slot and is fixedly connected to the pressing plate, one end of the shell is rotatably connected to a transmission gear 1 meshing with the transmission rack 1, one end of the transmission gear 1 is fixedly connected to a transmission gear 2, the top of the transmission plate is fixedly connected to a transmission rack 2 meshing with the transmission gear 2, one end of the guide slide rod is installed with an elastic part, and one end of the inside of the pressing bin is fixedly connected to a positioning part.

[0010] By adopting the above technical scheme and setting the coordinated use of the elastic member and the positioning member, it is convenient to start the hydraulic push rod to drive the pressing plate to move along the length direction of the lifting bin, so that the pressing plate drives the transmission rack 1 to engage with the transmission gear 1, and the transmission gear 2 to engage with the transmission rack 2, and drives the transmission plate to drive the U-shaped shaping mold to move along the length direction of the guide slide groove. When the U-shaped shaping mold moves to the bottom of the lifting bin, one end of the U-shaped shaping mold conflicts with the positioning member, and at the same time drives the guide slide rod to cooperate with the guide slide bar to extrude the elastic member to produce a contraction deformation. At this time, the hydraulic push rod drives the pressing plate to continue to extrude the fiber raw material into the inside of the U-shaped shaping mold along the length direction of the lifting bin, thereby effectively improving the practicability of the device.

[0011] Furthermore, the elastic member includes an ejection spring sleeved on one end of the guide slide bar, and one end of the ejection spring is in conflict with the guide slide bar.

[0012] By adopting the above technical solution, by setting the ejection spring for use with the guide slider and the guide slide rod, it is convenient to drive one end of the U-shaped forming mold to form a conflict with the positioning piece, and drive the transmission plate to continue to move along the length direction of the guide slide groove, so that the transmission plate drives the guide slide rod to cooperate with the guide slider to extrude the ejection spring to produce a contraction deformation, thereby effectively improving the applicability of the device.

[0013] Furthermore, the positioning member includes a U-shaped positioning bar fixedly connected to the inside of the pressing bin, and one end of the U-shaped shaping mold is in conflict with the U-shaped positioning bar.

[0014] By adopting the above technical scheme, by setting the U-shaped positioning strip for use with the pressing bin, it is convenient to drive the U-shaped forming mold to move along the length direction of the pressing bin to the bottom of the lifting bin, so that one end of the U-shaped forming mold will come into contact with the U-shaped positioning strip to achieve the positioning of the U-shaped forming mold, thereby further improving the practicability of the device.

[0015] Furthermore, a flexible rubber strip is symmetrically and fixedly connected to the bottom of the U-shaped forming mold.

[0016] By adopting the above technical solution, by setting up the flexible rubber strip and the U-shaped shaping mold for use in conjunction, the sealing between the bottom of the U-shaped shaping mold and the pressing bin is effectively improved, the residual fiber raw material on the bottom of the pressing bin is reduced, and the practicability of the device is improved.

[0017] Furthermore, a plurality of support rollers are evenly rotated and connected inside the discharge chute, and the support rollers form rolling contact with one end of the conveyor belt.

[0018] By adopting the above technical solution and arranging the supporting roller and the conveyor belt for use in combination, the supporting strength and stability of the conveyor belt for the fiber raw material are effectively improved.

[0019] Furthermore, one end of the U-shaped shaping die is fixedly connected to a receiving plate.

[0020] By adopting the above technical solution, by setting the supporting plate and the U-shaped shaping mold for use together, it is convenient to drive the supporting plate to receive and collect the fiber debris that slides down from the lifting bin when the U-shaped shaping mold is driven to separate from the bottom of the lifting bin, thereby effectively reducing the situation where the fiber debris falls into the pressing bin and is difficult to discharge.

[0021] Furthermore, the bottom of the feed port is provided with an inclined bottom platform facing the lifting bin.

[0022] By adopting the above technical solution, by setting up the coordinated use of the inclined base and the feed port, it is convenient to utilize the effect of gravity to make the fiber raw material inside the feed port slide along the top of the inclined base to the inside of the lifting bin, thereby effectively reducing the residual fiber raw material inside the feed port and improving the practicability of the device.

[0023] In summary, the present application includes at least one of the following beneficial effects:

[0024] 1. By setting up the transmission mechanism and cooperating with the U-shaped shaping mold, the lifting bin and the pressing plate, after starting the hydraulic push rod to drive the pressing plate to complete the pressing of the fiber raw material inside the U-shaped shaping mold, the hydraulic push rod can be started in the reverse direction to drive the U-shaped shaping mold to drive the pressed raw material to move along the length direction of the pressing bin to the top of the conveyor belt, and then the unloading motor is started to drive the transmission roller to cooperate with the conveyor belt to discharge the fiber raw material pressed inside the U-shaped shaping mold out of the pressing bin, thereby effectively reducing the pressing and discharging process of the fiber raw material and improving the pressing efficiency of the fiber raw material.

[0025] 2. By setting the coordinated use of the elastic member and the positioning member, it is convenient to start the hydraulic push rod to drive the pressing plate to move along the length direction of the lifting bin, so that the pressing plate drives the transmission rack 1 to engage with the transmission gear 1, and the transmission gear 2 to engage with the transmission rack 2, and drives the transmission plate to drive the U-shaped shaping mold to move along the length direction of the guide slide groove. When the U-shaped shaping mold moves to the bottom of the lifting bin, one end of the U-shaped shaping mold is in conflict with the positioning member, and at the same time drives the guide slide bar to cooperate with the guide slide bar to extrude the elastic member to produce a contraction deformation. At this time, the hydraulic push rod drives the pressing plate to continue to extrude the fiber raw material into the inside of the U-shaped shaping mold along the length direction of the lifting bin, thereby effectively improving the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the device body in this application.

[0027] Figure 2 It is a three-dimensional structural schematic diagram of the guide chute in this application.

[0028] Figure 3 It is a schematic diagram of the internal structure of the pressing bin in this application.

[0029] Description of reference numerals:

[0030] 1. Shell; 2. Pressing bin; 3. U-shaped forming mold; 4. Lifting bin; 5. Pressing plate; 6. Hydraulic push rod; 7. Feed port; 8. Guide chute; 9. Guide slider; 10. Guide slide bar; 11. Transmission plate; 12. Discharge chute; 13. Transmission roller; 14. Transmission belt; 15. Unloading motor; 16. Lifting chute; 17. Transmission rack 1; 18. Transmission gear 1; 19. Transmission gear 2; 20. Transmission rack 2; 21. Ejection spring; 22. U-shaped positioning strip; 23. Flexible rubber strip; 24. Support roller; 25. Discharge port; 26. Receiving plate; 27. Inclined bottom platform. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-3 This application is described in further detail.

[0032] The embodiment of the present application discloses a compression molding and packaging device for plant fibers.

[0033] Reference Figure 1-Figure 3 A pressing and forming packaging device for plant fiber comprises a shell 1, a pressing bin 2 is provided inside the shell 1, a U-shaped shaping mold 3 is slidably connected inside the pressing bin 2, a lifting bin 4 is provided on the top of the pressing bin 2, a pressing plate 5 is slidably connected inside the lifting bin 4, a hydraulic push rod 6 is fixedly connected to the top of the shell 1, an output end of the hydraulic push rod 6 passes through the shell 1 and is fixedly connected to the pressing plate 5, a feed port 7 connected to the lifting bin 4 is provided at one end of the shell 1, a guide chute 8 connected to the pressing bin 2 is symmetrically provided on one side of the shell 1, a guide slider 9 is symmetrically fixedly connected to one end of the U-shaped shaping mold 3, and the guide slider 9 is slidably connected to the inside of the guide chute 8 , a guide slide bar 10 is slidably penetrated at one end of the guide slider 9, a transmission plate 11 is fixedly connected to one end of the two guide slide bars 10, a discharge trough 12 is provided at the bottom of the pressing bin 2, a transmission roller 13 is symmetrically rotated inside the discharge trough 12, a transmission belt 14 is sleeved at one end of the two transmission rollers 13, a discharge motor 15 is fixedly connected to one side of the shell 1, an output end of the discharge motor 15 is fixedly connected to a transmission roller 13, a discharge port 25 adapted to the U-shaped finalizing mold 3 is provided on one side of the shell 1, and the discharge port 25 is arranged above the discharge trough 12, and a transmission mechanism for driving the transmission plate 11 to move along the length direction of the guide slide bar 10 is installed at one end of the shell 1;

[0034] Among them, the transmission mechanism includes a lifting chute 16 opened on one side of the lifting bin 4, a transmission rack 17 is slidably connected inside the lifting chute 16, one end of the transmission rack 17 passes through the lifting chute 16 and is fixedly connected to the pressing plate 5, one end of the shell 1 is rotatably connected to a transmission gear 18 meshing with the transmission rack 17, one end of the transmission gear 18 is fixedly connected to a transmission gear 2 19, the top of the transmission plate 11 is fixedly connected to a transmission rack 2 20 meshing with the transmission gear 2 19, one end of the guide slide rod 10 is installed with an elastic member, and one end of the inside of the pressing bin 2 is fixedly connected with a positioning member;

[0035] Furthermore, the elastic member includes an ejection spring 21 sleeved on one end of the guide slide bar 10, and one end of the ejection spring 21 is in conflict with the guide slide bar 9;

[0036] Furthermore, the positioning member includes a U-shaped positioning strip 22 fixedly connected to the inside of the pressing bin 2 , and one end of the U-shaped shaping die 3 is in conflict with the U-shaped positioning strip 22 .

[0037] When in use, first start the hydraulic push rod 6 to push the pressing plate 5 to move downward along the length direction of the lifting bin 4, and make the pressing plate 5 drive the transmission rack 17 to move downward along the length direction of the lifting chute 16, and at the same time make the transmission rack 17 mesh with the transmission gear 18, and drive the transmission gear 2 19 to mesh with the transmission rack 2 20, so as to drive the transmission rack 2 20 to drive the transmission plate 11 to pull the guide slide bar 10 to move along the length direction of the guide chute 8, when the transmission plate 11 drives the U-shaped shaping mold 3 to move to the bottom of the lifting bin 4, so that one end of the U-shaped shaping mold 3 is in conflict with the U-shaped positioning bar 22, and then the transmission plate 11 pulls the guide slide bar 10 to squeeze the ejection spring 21 to produce a contraction deformation, and then pour the fiber raw material into the lifting bin 4 through the feed port 7, and under the action of gravity, the fiber raw material is introduced into the U-shaped shaping mold 3 along the guiding direction of the lifting bin 4, and at the same time, the pressing plate 5 pushes the fiber raw material to the inside of the U-shaped shaping mold 3 for compaction;

[0038] Then, by reversely starting the hydraulic push rod 6, the pressing plate 5 is driven to move upward along the length direction of the lifting bin 4, and the pressing plate 5 is disengaged from the pressing of the fiber raw material inside the U-shaped shaping mold 3, and at the same time, the pressing plate 5 drives the transmission rack 17 to engage with the transmission gear 18, and drives the transmission gear 2 19 to drive the transmission rack 2 20 to move along the length direction of the guide slide 8, so that the transmission rack 2 20 pushes the guide slider 9 to drive the U-shaped shaping mold 3 to move along the length direction of the pressing bin 2 to one side of the discharge port 25, and at the same time, the fiber raw material pressed inside the U-shaped shaping mold 3 falls on the top of the conveyor belt 14 under the action of gravity, and then the unloading motor 15 is started to drive the conveyor roller 13 to rotate, and drive the conveyor belt 14 to send the pressed fiber raw material on the top out of the pressing bin 2 through the discharge port 25, thereby effectively reducing the pressing and discharging process of the fiber raw material and improving the pressing efficiency of the fiber raw material.

[0039] Reference Figure 2 and Figure 3 A flexible rubber strip 23 is symmetrically fixedly connected to the bottom of the U-shaped shaping mold 3 .

[0040] During use, when the U-shaped molding die 3 is driven to move along the length direction of the pressing bin 2, the U-shaped molding die 3 drives the flexible rubber strip 23 to form a flexible contact with the inner bottom of the pressing bin 2, and utilizes the elastic deformation of the flexible rubber strip 23 to fill the gap between the bottom of the U-shaped molding die 3 and the pressing bin 2, thereby effectively reducing the residual fiber raw material at the bottom of the pressing bin 2 and improving the practicability of the device.

[0041] Reference Figure 1 and Figure 3 A plurality of support rollers 24 are connected to the discharge chute 12 so as to rotate evenly therein, and the support rollers 24 form rolling contact with one end of the conveyor belt 14 .

[0042] When in use, when the fiber raw material pressed inside the driving U-shaped shaping mold 3 falls on the top of the conveyor belt 14, the fiber raw material pushes the conveyor belt 14 to form a rolling conflict with the support roller 24, and the support roller 24 is used to improve the support strength and stability of the conveyor belt 14 for the fiber raw material.

[0043] Reference Figure 1 and Figure 3 One end of the U-shaped shaping die 3 is fixedly connected with a receiving plate 26 .

[0044] During use, when the U-shaped shaping mold 3 is driven to separate from the bottom of the lifting bin 4 along the length direction of the pressing bin 2, the U-shaped shaping mold 3 drives the receiving plate 26 to move along the length direction of the pressing bin 2 to the bottom of the lifting bin 4, and receives the fiber debris that slides down from the inside of the lifting bin 4. Then, when the U-shaped shaping mold 3 is driven back to the bottom of the lifting bin 4, the inner wall of the pressing bin 2 scrapes the fiber raw material debris received on the top of the receiving plate 26 and drops it into the inside of the U-shaped shaping mold 3, thereby further improving the practicability of the device.

[0045] Reference Figure 1 and Figure 3 The bottom of the feed port 7 is provided with an inclined bottom platform 27 facing the lifting bin 4.

[0046] During use, when fiber raw materials are poured into the feed port 7, the fiber raw materials slide toward the inside of the lifting bin 4 along the top of the inclined base 27 under the action of gravity, thereby effectively reducing the residual fiber raw materials inside the feed port 7 and improving the practicability of the device.

[0047] The implementation principle of the pressing and forming packaging device for plant fiber in this embodiment is as follows: first, the hydraulic push rod 6 is started to push the pressing plate 5 to move downward along the length direction of the lifting bin 4, and the pressing plate 5 drives the transmission rack 17 to move downward along the length direction of the lifting slot 16, and at the same time, the transmission rack 17 is meshed with the transmission gear 18, and the transmission gear 2 19 is driven to mesh with the transmission rack 2 20, so as to drive the transmission rack 2 20 to drive the transmission plate 11 to pull the guide slide bar 10 to move along the length direction of the guide slot 8. When the transmission plate 11 drives the U-shaped shaping mold 3 to move to the bottom of the lifting bin 4, one end of the U-shaped shaping mold 3 is in conflict with the U-shaped positioning strip 22, and then the transmission plate 11 pulls the guide slide bar 10 to squeeze the ejection spring 21 to produce a contraction deformation;

[0048] Then, the fiber raw material is poured into the feed port 7, and the fiber raw material is made to slide along the top of the inclined bottom platform 27 into the lifting bin 4 under the action of gravity, and the fiber raw material is introduced into the U-shaped shaping mold 3 along the guiding direction of the lifting bin 4, and the hydraulic push rod 6 is started to drive the pressing plate 5 to push the fiber raw material into the U-shaped shaping mold 3 for compaction;

[0049] Then, by reversely starting the hydraulic push rod 6, the pressing plate 5 is driven to move upward along the length direction of the lifting bin 4, and the pressing plate 5 is disengaged from the pressing of the fiber raw material inside the U-shaped shaping mold 3. At the same time, the pressing plate 5 drives the transmission rack 17 to engage with the transmission gear 18, and drives the transmission gear 2 19 to drive the transmission rack 20 to move along the length direction of the guide slide 8, so that the transmission rack 2 20 pushes the guide slider 9 to drive the U-shaped shaping mold 3 to move along the length direction of the pressing bin 2 to one side of the discharge port 25, and at the same time, the fiber raw material pressed inside the U-shaped shaping mold 3 falls on the top of the conveyor belt 14 under the action of gravity, and at the same time, the fiber raw material pushes the conveyor belt 14 to form a rolling conflict with the support roller 24, and then the unloading motor 15 is started to drive the transmission roller 13 to rotate, and drive the conveyor belt 14 to send the pressed fiber raw material on the top out of the pressing bin 2 through the discharge port 25.

Claims

1. A compression molding and packaging device for plant fibers, comprising a housing (1), characterized in that: A pressing bin (2) is provided inside the shell (1), and a U-shaped shaping die (3) is slidably connected inside the pressing bin (2). A lifting bin (4) is provided on the top of the pressing bin (2), and a pressing plate (5) is slidably connected inside the lifting bin (4). A hydraulic push rod (6) is fixedly connected to the top of the shell (1), and the output end of the hydraulic push rod (6) passes through the shell (1) and is fixedly connected to the pressing plate (5). A feed port (7) connected to the lifting bin (4) is provided at one end of the shell (1), and a guide slot (8) connected to the pressing bin (2) is symmetrically provided on one side of the shell (1). A guide slider (9) is symmetrically fixedly connected to one end of the U-shaped shaping die (3), and the guide slider (9) is slidably connected to the inside of the guide slot (8). A guide slide bar (10) is slidably penetrated at one end, and one end of the two guide slide bars (10) is fixedly connected to a transmission plate (11). A discharge trough (12) is provided at the bottom of the pressing bin (2), and a transmission roller (13) is symmetrically rotatably connected inside the discharge trough (12). One end of the two transmission rollers (13) is sleeved with a transmission belt (14). A discharge motor (15) is fixedly connected to one side of the shell (1), and the output end of the discharge motor (15) is fixedly connected to a transmission roller (13). A discharge port (25) adapted to the U-shaped shaping mold (3) is provided at one side of the shell (1), and the discharge port (25) is arranged above the discharge trough (12). A transmission mechanism for driving the transmission plate (11) to move along the length direction of the guide slide bar (10) is installed at one end of the shell (1).

2. A compression molding and packaging device for plant fibers according to claim 1, characterized in that: The transmission mechanism comprises a lifting slide groove (16) provided on one side of the lifting bin (4); a transmission rack (17) is slidably connected inside the lifting slide groove (16); one end of the transmission rack (17) passes through the lifting slide groove (16) and is fixedly connected to the pressing plate (5); one end of the housing (1) is rotatably connected to a transmission gear (18) meshing with the transmission rack (17); one end of the transmission gear (18) is fixedly connected to a transmission gear (19); a top of the transmission plate (11) is fixedly connected to a transmission rack (20) meshing with the transmission gear (19); one end of the guide slide rod (10) is provided with an elastic member; and one end of the pressing bin (2) is fixedly connected to a positioning member.

3. A pressing and forming packaging device for plant fibers according to claim 2, characterized in that: The elastic member comprises an ejection spring (21) sleeved on one end of the guide slide bar (10), and one end of the ejection spring (21) is in contact with the guide slide block (9).

4. A pressing and forming packaging device for plant fibers according to claim 2, characterized in that: The positioning member comprises a U-shaped positioning strip (22) fixedly connected to the interior of the pressing bin (2), and one end of the U-shaped shaping die (3) is in contact with the U-shaped positioning strip (22).

5. The compression molding and packaging device for plant fibers according to claim 1, characterized in that: A flexible rubber strip (23) is symmetrically and fixedly connected to the bottom of the U-shaped shaping mold (3).

6. The compression molding and packaging device for plant fibers according to claim 1, characterized in that: The inside of the discharge chute (12) is evenly connected to a plurality of support rollers (24), and the support rollers (24) form rolling contact with one end of the conveyor belt (14).

7. The compression molding and packaging device for plant fibers according to claim 1, characterized in that: One end of the U-shaped shaping die (3) is fixedly connected to a material receiving plate (26).

8. The compression molding and packaging device for plant fibers according to claim 1, characterized in that: The bottom of the feed port (7) is provided with an inclined bottom platform (27) facing the lifting bin (4).

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