Injection molding crusher with waste recycling structure

Abstract

The present invention discloses an injection molding pulverizer with a waste material recycling structure, comprising a pulverizing box and a double-shaft motor, wherein the double-shaft motor is connected to the rear inner wall of the pulverizing box, a pulverizing tool and a protective seat are connected to the rotating shaft, and one end of the second hydraulic cylinder is connected to a transmission block. In the injection molding pulverizer with a waste material recycling structure, when the pulverizing tool continuously rotates to pulverize and causes the injection molding raw materials to adhere to the inner wall of the pulverizing box, the staff can control the second hydraulic cylinder to push the transmission block to engage in the transmission groove in the electric heat recovery mechanism, so that when the double-shaft motor drives the pulverizing tool to rotate, the scraper and the mounting frame in the electric heat recovery mechanism can be driven to rotate with it, and the rotating scraper will scrape the injection molding raw materials on the inner wall of the pulverizing box at the pulverizing tool, and at the same time, the electric heating plate in the rotating mounting frame heats the injection molding raw materials adhered to the inner wall of the pulverizing box, so that the scraper can scrape the injection molding raw materials solidified on the inner wall of the pulverizing box.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, in particular to an injection molding crusher with a waste material recycling structure. Background Art

[0002] Injection molding is a method for producing industrial products, and the products usually use rubber injection molding and plastic injection molding. Injection molding can also be divided into injection molding molding method and die casting method. Injection molding production requires the use of a crusher to crush the raw materials. After searching, it is found that the injection molding machine in the prior art is typically such as the publication number CN214819990U, a particle crusher for an injection molding machine, including a particle crusher body, a support base is provided below the particle crusher body, the top of the support base and the bottom of the particle crusher body are connected by two connecting plates, a filter tube is provided below the particle crusher body, and the discharge pipe of the particle crusher body is located in the filter tube, and a filter screen is provided in the filter tube. Both sides of the filter tube are provided with movable blocks, and a card slot is provided on one side of the movable block, and a card block is provided in the card slot. Its main feature is to prevent the filter screen from being blocked.

[0003] To sum up, in order to ensure the crushing efficiency, most of the existing crushers perform crushing work continuously, which easily forms high temperature inside the crusher to melt the injection molding raw materials, and then the melted injection molding raw materials adhere to the inner wall of the crushing box. The adhered injection molding raw materials will cause the internal space of the crusher to become smaller, affecting the normal crushing work, and easily causing waste of injection molding raw materials. Frequent shutdowns for cleaning are cumbersome and easily cause damage to the device, affecting the service life of the device. In view of the above problems, it is necessary to improve the existing equipment. Summary of the invention

[0004] The object of the present invention is to provide an injection molding crusher with a waste recycling structure to solve the problem that the existing crushers proposed in the above background technology mostly perform crushing work continuously in order to ensure the crushing efficiency, which easily forms high temperature inside the crusher to melt the injection molding raw materials, and then the melted injection molding raw materials adhere to the inner wall of the crushing box. The adhered injection molding raw materials will cause the internal space of the crusher to become smaller, affecting the normal crushing work, and easily causing waste of injection molding raw materials. Frequent shutdown for cleaning is cumbersome and easy to cause damage to the device, affecting the service life of the device.

[0005] To achieve the above object, the present invention provides the following technical solution: an injection molding pulverizer with a waste recycling structure, comprising a pulverizing box and a dual-axis motor,

[0006] A feed port is provided at the top of the crushing box, and a first crushing roller and a second crushing roller are arranged in the crushing box, the first crushing roller and the second crushing roller are both connected with a transmission gear, and one end of the second crushing roller is fixedly connected to one end of the first motor, the first crushing roller is connected to the porous rotating cage, and a first hydraulic cylinder is arranged in the porous rotating cage, the top end of the first hydraulic cylinder is fixedly connected to the bottom of the limit block, and the limit block is connected to the first crushing roller;

[0007] The dual-axis motor is connected to the rear inner wall of the crushing box, and the output end of the dual-axis motor is connected to the rotating shaft, the crushing tool and the protective seat are connected to the rotating shaft, and a second hydraulic cylinder is arranged in the protective seat, one end of the second hydraulic cylinder is connected to the transmission block, and the transmission block is arranged on the inner side of the electric heat recovery mechanism, and the electric heat recovery mechanism is connected to the inner wall of the crushing box, a porous partition plate is arranged in the crushing box, and the porous partition plate is arranged below the crushing tool, a discharge port is opened at the bottom of the crushing box, and the crushing box is fixedly connected to the base through a frame.

[0008] Preferably, the first motor, the second pulverizing roller, the transmission gear and the first pulverizing roller form a rotating structure, and the transmission gears are meshedly connected, and the first pulverizing roller and the second pulverizing roller rotate in opposite directions.

[0009] Preferably, the porous cage is arranged below the inner sides of the first crushing roller and the second crushing roller, and the porous cage is rotatably connected to the first crushing roller.

[0010] Preferably, the limit block is slidably connected inside the porous cage, and the limit block is engaged and connected with the first crushing roller.

[0011] Preferably, the crushing cutters are distributed on the rotating shaft in a ring array, and four groups of crushing cutters are arranged at equal intervals.

[0012] Preferably, the electric heat recovery mechanism includes a scraper, a mounting frame, a transmission groove, a rotating frame, an electric heating plate and a guide groove, and the scraper and the mounting frame are correspondingly arranged inside the crushing box, and an electric heating plate is installed on the inner side of the mounting frame. The scraper and the mounting frame are symmetrically connected with a rotating frame, and the rotating frame is arranged in the guide groove, and transmission grooves are opened on the side walls of the scraper and the mounting frame.

[0013] Preferably, the transmission groove is symmetrically arranged on the outer side walls of the scraper and the mounting frame, and the transmission groove is snap-connected with the transmission block.

[0014] Preferably, the rotating frame is slidably connected in a guide groove, and the guide groove is provided on the left and right inner side walls of the crushing box.

[0015] Preferably, a rack is fixedly connected to the bottom of the porous partition plate, and the rack is meshingly connected to a driving gear, and the driving gear is fixedly connected to an output end of the second motor.

[0016] Preferably, the porous partition plate is slidably connected in the crushing box, and the front and rear side walls of the porous partition plate are fixedly connected with the first electric telescopic rod and the second electric telescopic rod, and the other ends of the first electric telescopic rod and the second electric telescopic rod are respectively engaged with the cleaning door and the rear inner wall of the crushing box, the cleaning door is slidably connected in the outer side wall of the crushing box, and a cleaning window is installed on the crushing box.

[0017] Compared with the prior art, the invention has the following beneficial effects: the injection molding pulverizer with waste recycling structure,

[0018] (1) The present invention can effectively solve the problem that the existing pulverizers mostly perform pulverizing work continuously to ensure pulverizing efficiency, which easily forms high temperature inside the pulverizer to melt the injection molding raw materials, and then the melted injection molding raw materials adhere to the inner wall of the pulverizing box. The adhered injection molding raw materials will cause the internal space of the pulverizer to become smaller, affecting the normal pulverizing work, and easily causing waste of injection molding raw materials. Frequent shutdown for cleaning is cumbersome and easy to cause damage to the device, affecting the service life of the device. When the pulverizing cutter rotates continuously for pulverizing and causes the injection molding raw materials to adhere to the inner wall of the pulverizing box, the staff can control the second hydraulic The cylinder pushes the transmission block to engage in the transmission groove in the electric heat recovery mechanism, so that when the dual-axis motor drives the crushing tool to rotate, the scraper and the mounting frame in the electric heat recovery mechanism can be driven to rotate. The rotating scraper will scrape the injection molding raw materials on the inner wall of the crushing box at the crushing tool. At the same time, the electric heating plate in the rotating mounting frame heats the injection molding raw materials adhered to the inner wall of the crushing box, so that the scraper can scrape the injection molding raw materials solidified on the inner wall of the crushing box, so as to ensure the normal crushing work and facilitate the recovery of the injection molding raw materials. Compared with the existing shutdown cleaning, this cleaning method is simpler and more convenient. The entire cleaning process does not require shutting down the device, so as to prevent the device from reducing its service life due to frequent opening and closing.

[0019] (2) The present invention can effectively solve the problem that most existing pulverizers only have one pulverizing process, which is prone to uneven pulverizing, by using the first motor, the porous cage, the first hydraulic cylinder, the limit block and the porous partition plate in combination. The first pulverizing roller and the second pulverizing roller will perform initial pulverization on the material under the coordinated drive of the first motor and the transmission gear. At the same time, the porous cage can screen the injection molding raw materials after the initial pulverization, that is, the injection molding raw materials that do not meet the pulverizing requirements will remain in the porous cage. The first hydraulic cylinder can regularly push the limit block to connect with the first pulverizing roller, so that the rotating first pulverizing roller can be used to drive the porous cage and the injection molding raw materials screened therein to rotate, so that the injection molding raw materials screened therein can be poured onto the top of the first pulverizing roller and the second pulverizing roller, thereby facilitating the first pulverizing roller and the second pulverizing roller to repeatedly pulverize it and thereby ensure the uniformity of pulverization. At the same time, the porous partition plate can further screen the injection molding raw materials that are pulverized by the pulverizing tool, that is, the secondary pulverized, that is, the injection molding raw materials that do not meet the requirements will remain on the porous partition plate for continuous pulverization, thereby facilitating further ensuring the pulverizing quality of the device, that is, the uniformity of pulverization;

[0020] (3) The present invention can effectively solve the problem of the device being closed and inconvenient to clean the porous partition plate that is frequently blocked due to continuous crushing of the crushing tool, increased temperature inside the device, and melting of the injection molding raw materials through the coordinated use of the driving gear, the second motor, the first electric telescopic rod, the second electric telescopic rod and the cleaning door. The second motor can drive the driving gear to rotate, and the rotating driving gear will push the rack to drive the porous partition plate to move and extend out from the side wall of the crushing box, that is, the porous partition plate can be automatically extended, thereby facilitating the staff to clean it. At the same time, the first electric telescopic rod can extend to the front side when the porous partition plate moves and connect with the cleaning door, so that the cleaning door can be opened and closed with the porous partition plate when it moves, thereby facilitating the improvement of the linkage of the device structure. At the same time, the second electric telescopic rod can extend to the rear side when the porous partition plate is screening and contact and engage with the rear inner wall of the crushing box, thereby fixing the position of the porous partition plate, thereby facilitating the improvement of the stability of the porous partition plate when it is used. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the main structure of the present invention;

[0023] Figure 3 It is a top view cross-sectional structural diagram of the connection relationship between the dual-axis motor, the rotating shaft, the crushing tool, the protective seat, the second hydraulic cylinder and the transmission block of the present invention;

[0024] Figure 4 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0025] Figure 5 For the present invention Figure 1 The enlarged structural diagram at B in the middle;

[0026] Figure 6 It is a rear view structural schematic diagram of the connection relationship between the first electric telescopic rod, the second electric telescopic rod, the cleaning door, the porous partition plate and the rack of the present invention.

[0027] In the figure: 1. crushing box; 2. feeding port; 3. first crushing roller; 4. second crushing roller; 5. first motor; 6. porous cage; 7. first hydraulic cylinder; 8. limit block; 9. transmission gear; 10. double-axis motor; 11. rotating shaft; 12. crushing tool; 13. protective seat; 14. second hydraulic cylinder; 15. transmission block; 16. electric heat recovery mechanism; 1601. scraper; 1602. mounting frame; 1603. transmission groove; 1604. rotating frame; 1605. electric heating plate; 1606. guide groove; 17. porous partition plate; 18. rack; 19. driving gear; 20. second motor; 21. first electric telescopic rod; 22. second electric telescopic rod; 23. cleaning door; 24. cleaning window; 25. discharge port; 26. frame; 27. base. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-6 The present invention provides a technical solution: an injection molding crusher with a waste recycling structure,

[0030] Embodiment 1

[0031] like Figure 1 and Figure 2 As shown, a feed port 2 is provided at the top of the crushing box 1, and a first crushing roller 3 and a second crushing roller 4 are arranged in the crushing box 1, a transmission gear 9 is connected to the first crushing roller 3 and the second crushing roller 4, and one end of the second crushing roller 4 is fixedly connected to one end of the first motor 5, the first crushing roller 3 is connected to the porous rotating cage 6, and a first hydraulic cylinder 7 is arranged in the porous rotating cage 6, the top end of the first hydraulic cylinder 7 is fixedly connected to the bottom of the limit block 8, and the limit block 8 is connected to the first crushing roller 3.

[0032] In a further embodiment, the first motor 5, the second crushing roller 4, the transmission gear 9 and the first crushing roller 3 form a rotating structure, and the transmission gears 9 are meshed and connected, and the first crushing roller 3 and the second crushing roller 4 rotate in opposite directions.

[0033] Specifically, the first crushing roller 3 and the second crushing roller 4 rotate and extrude to preliminarily crush the injection molding raw material. Since they will not continuously and repeatedly contact a certain injection molding raw material, the injection molding raw material will not melt due to heat and adhere to the inner wall of the crushing box 1.

[0034] In a further embodiment, the porous cage 6 is disposed below the inner sides of the first pulverizing roller 3 and the second pulverizing roller 4 , and the porous cage 6 is rotatably connected to the first pulverizing roller 3 .

[0035] In a further embodiment, the limit block 8 is slidably connected inside the porous cage 6 , and the limit block 8 is engaged and connected with the first crushing roller 3 .

[0036] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the dual-axis motor 10 is connected to the rear inner wall of the crushing box 1, and the output end of the dual-axis motor 10 is connected to the rotating shaft 11, the rotating shaft 11 is connected to the crushing tool 12 and the protective seat 13, and the second hydraulic cylinder 14 is arranged in the protective seat 13, one end of the second hydraulic cylinder 14 is connected to the transmission block 15, and the transmission block 15 is arranged on the inner side of the electric heat recovery mechanism 16, and the electric heat recovery mechanism 16 is connected to the inner wall of the crushing box 1.

[0037] In a further embodiment, the crushing cutters 12 are distributed on the rotating shaft 11 in a ring array, and four groups of crushing cutters 12 are arranged at equal intervals.

[0038] In a further embodiment, the electric heat recovery mechanism 16 includes a scraper 1601, a mounting frame 1602, a transmission groove 1603, a rotating frame 1604, an electric heating plate 1605 and a guide groove 1606, and the scraper 1601 and the mounting frame 1602 are correspondingly arranged inside the crushing box 1, and the electric heating plate 1605 is installed on the inner side of the mounting frame 1602, the scraper 1601 and the mounting frame 1602 are symmetrically connected with the rotating frame 1604, and the rotating frame 1604 is arranged in the guide groove 1606, and the transmission groove 1603 is opened on the side walls of the scraper 1601 and the mounting frame 1602.

[0039] In a further embodiment, the transmission groove 1603 is symmetrically arranged on the outer side walls of the scraper 1601 and the mounting frame 1602 , and the transmission groove 1603 is engaged and connected with the transmission block 15 .

[0040] In a further embodiment, the rotating frame 1604 is slidably connected in the guide groove 1606 , and the guide groove 1606 is provided on the left and right inner side walls of the crushing box 1 .

[0041] like Figure 1 , Figure 2 and Figure 6 As shown, a porous partition plate 17 is provided in the crushing box 1, and the porous partition plate 17 is arranged below the crushing tool 12. A discharge port 25 is opened at the bottom of the crushing box 1, and the crushing box 1 is fixedly connected to the base 27 through a frame 26.

[0042] Specifically, in the actual working process, the injection molding raw materials are put into the crushing box 1 through the feed port 2. After entering the crushing box 1, the injection molding raw materials will fall between the first crushing roller 3 and the second crushing roller 4. Under the cooperation of the first motor 5 and the transmission gear 9, the first crushing roller 3 and the second crushing roller 4 will rotate inward in the same direction to perform preliminary crushing on the injection molding raw materials. After the crushed particles are filtered by the porous rotating cage 6, they will contact with the rotating crushing tool 12 for secondary crushing, while the plastic particles that do not meet the requirements will remain in the porous rotating cage 6. Then the first hydraulic cylinder 7 can regularly push the limit block 8 It is connected to the first crushing roller 3, so that the rotating first crushing roller 3 can be used to drive the porous cage 6 to rotate, so that the injection molding raw materials that do not meet the requirements inside the porous cage 6 can be poured onto the top of the first crushing roller 3 and the second crushing roller 4, and then they can be repeatedly crushed by the first crushing roller 3 and the second crushing roller 4. After being crushed by the crushing tool 12, the plastic particles of qualified size will continue to fall through the through holes on the porous partition plate 17 and be discharged through the discharge port 25, while the plastic particles that do not meet the requirements will remain on the top of the porous partition plate 17 and continue to be crushed until they meet the requirements.

[0043] The staff can check the crushing work inside the crushing box 1 through the cleaning window 24. When the inner wall of the crushing box 1 at the crushing tool 12 needs to be cleaned, the staff can control the second hydraulic cylinder 14 to push the transmission block 15 to engage with the transmission groove 1603, so that the scraper 1601 and the mounting frame 1602 can rotate with the rotating shaft 11. The rotating scraper 1601 will scrape the injection molding raw materials on the inner wall of the crushing box 1 inside it. At the same time, the mounting frame 1602 drives the electric heating plate 1605 to heat the injection molding raw materials adhered to the inner wall of the crushing box 1, thereby avoiding the phenomenon that the scraper 1601 cannot scrape the injection molding raw materials due to solidification.

[0044] Embodiment 2

[0045] This embodiment is a further description of the above embodiment. It should be understood that this embodiment includes all the aforementioned technical features and is further described in detail.

[0046] like Figure 1 , Figure 2 and Figure 6 As shown, in a further embodiment, a rack 18 is fixedly connected to the bottom of the porous partition plate 17 , and the rack 18 is meshedly connected to a driving gear 19 , and the driving gear 19 is fixedly connected to the output end of the second motor 20 .

[0047] In a further embodiment, the porous partition plate 17 is slidably connected in the crushing box 1, and the first electric telescopic rod 21 and the second electric telescopic rod 22 are fixedly connected in the front and rear side walls of the porous partition plate 17, and the other ends of the first electric telescopic rod 21 and the second electric telescopic rod 22 are respectively engaged with the cleaning door 23 and the rear inner wall of the crushing box 1, the cleaning door 23 is slidably connected in the outer wall of the crushing box 1, and a cleaning window 24 is installed on the crushing box 1.

[0048] Specifically, when the porous partition plate 17 needs to be cleaned, the staff can control the second motor 20 to drive the driving gear 19 to rotate. The rotating driving gear 19 will push the porous partition plate 17 to extend from the left side of the crushing box 1 through the rack 18, so that the porous partition plate 17 can be cleaned. At the same time, when the porous partition plate 17 moves, the second electric telescopic rod 22 shrinks into the porous partition plate 17, and at the same time, the first electric telescopic rod 21 extends forward and engages with the cleaning door 23, so that the cleaning door 23 can be opened accordingly, thereby facilitating the staff to clean the crushing tool 12 inside the crushing box 1.

[0049] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the protection content of the present invention.

[0050] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An injection molding pulverizer with a waste recycling structure, comprising a pulverizing box (1) and a dual-shaft motor (10), characterized in that: A feed port (2) is provided at the top of the pulverizing box (1), and a first pulverizing roller (3) and a second pulverizing roller (4) are arranged in the pulverizing box (1), the first pulverizing roller (3) and the second pulverizing roller (4) are both connected to a transmission gear (9), and one end of the second pulverizing roller (4) is fixedly connected to one end of a first motor (5), the first pulverizing roller (3) is connected to a porous rotating cage (6), and a first hydraulic cylinder (7) is arranged in the porous rotating cage (6), the top end of the first hydraulic cylinder (7) is fixedly connected to the bottom of a limit block (8), and the limit block (8) is connected to the first pulverizing roller (3); The dual-axis motor (10) is connected to the rear inner wall of the crushing box (1), and the output end of the dual-axis motor (10) is connected to the rotating shaft (11), the crushing tool (12) and the protective seat (13) are connected to the rotating shaft (11), and a second hydraulic cylinder (14) is arranged in the protective seat (13), one end of the second hydraulic cylinder (14) is connected to the transmission block (15), and the transmission block (15) is arranged on the inner side of the electric heat recovery mechanism (16), and the electric heat recovery mechanism (16) is connected to the inner wall of the crushing box (1), a porous partition plate (17) is arranged in the crushing box (1), and the porous partition plate (17) is arranged below the crushing tool (12), a discharge port (25) is opened at the bottom of the crushing box (1), and the crushing box (1) is fixedly connected to the base (27) through a frame (26); The electric heat recovery mechanism (16) comprises a scraper (1601), a mounting frame (1602), a transmission groove (1603), a rotating frame (1604), an electric heating plate (1605) and a guide groove (1606), wherein the scraper (1601) and the mounting frame (1602) are correspondingly arranged inside the crushing box (1), and the electric heating plate (1605) is installed inside the mounting frame (1602), and the scraper (1601) and the mounting frame (1602) are symmetrically connected to the rotating frame (1604), and the rotating frame (1604) is arranged in the guide groove (1606), and transmission grooves (1603) are provided on the side walls of the scraper (1601) and the mounting frame (1602), and the transmission grooves (1603) are symmetrically provided on the outer side walls of the scraper (1601) and the mounting frame (1602), and the transmission grooves (1603) are engaged with the transmission block (15), and the rotating frame (1604) is slidably connected in the guide groove (1606), and the guide grooves (1606) are provided on the left and right inner side walls of the crushing box (1).

2. The injection molding pulverizer with a waste recycling structure according to claim 1, characterized in that: The first motor (5), the second crushing roller (4), the transmission gear (9) and the first crushing roller (3) form a rotating structure, and the transmission gears (9) are meshingly connected, and the first crushing roller (3) and the second crushing roller (4) rotate in opposite directions.

3. The injection molding pulverizer with a waste recycling structure according to claim 1, characterized in that: The porous rotating cage (6) is arranged below the inner sides of the first pulverizing roller (3) and the second pulverizing roller (4), and the porous rotating cage (6) is rotatably connected to the first pulverizing roller (3).

4. The injection molding pulverizer with a waste recycling structure according to claim 1, characterized in that: The limit block (8) is slidably connected inside the porous rotating cage (6), and the limit block (8) is engaged and connected with the first crushing roller (3).

5. The injection molding pulverizer with a waste recycling structure according to claim 1, characterized in that: The crushing cutters (12) are distributed on the rotating shaft (11) in the form of a ring array, and four groups of crushing cutters (12) are arranged at equal intervals.

6. The injection molding pulverizer with a waste recycling structure according to claim 1, characterized in that: A rack (18) is fixedly connected to the bottom of the porous partition plate (17), and the rack (18) is meshingly connected to a driving gear (19), while the driving gear (19) is fixedly connected to the output end of the second motor (20).

7. The injection molding pulverizer with a waste recycling structure according to claim 1, characterized in that: The porous partition plate (17) is slidably connected in the crushing box (1), and a first electric telescopic rod (21) and a second electric telescopic rod (22) are fixedly connected in the front and rear side walls of the porous partition plate (17), and the other ends of the first electric telescopic rod (21) and the second electric telescopic rod (22) are respectively engaged with a cleaning door (23) and the rear inner wall of the crushing box (1), the cleaning door (23) is slidably connected in the outer wall of the crushing box (1), and a cleaning window (24) is installed on the crushing box (1).

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