Granule forming device for crushed straw stalks

Abstract

The utility model relates to a particle forming device for crushed straw stalks. The particle forming device comprises a material pressing cavity, a material pressing rotating shaft, a fixed disc, a material pressing roller, a material cutting mechanism and a driving part, the fixing disc is horizontally fixed in the pressing cavity, the pressing rotating shaft is vertically arranged, one end of the pressing rotating shaft penetrates through the fixing disc and is connected with the fixing disc through a bearing, a horizontally-arranged pressing roller connecting shaft is fixed to the end, penetrating out of the fixing disc, of the pressing rotating shaft, and the pressing roller is located above the fixing disc and rotationally connected to the pressing roller connecting shaft. A horn hole with a large upper part and a small lower part is formed in the fixed disc; the cutting mechanism is arranged below the fixed disc and is used for cutting straw fuel particles pressed out from the lower part of the horn mouth; the driving part is used for driving the rotating shaft and the cutting mechanism to act; the device has the advantages that particles with certain shapes and densities are formed through cooperation of the pore plate and the compression roller, compared with other processes and physical extrusion modes, the production cost is greatly reduced, and meanwhile the device is more environmentally friendly and suitable for operation of farmers.

Description

Technical Field

[0001] The utility model relates to the field of rice straw processing equipment, in particular to a granulation device for pulverized rice straw. Background Art

[0002] Straw is the general term for the stems and leaves of mature crops, usually referring to the remaining parts after harvesting the grains of coarse grains such as wheat, rice, corn, potatoes, rapeseed, cotton, etc. In the past, the common way to deal with straw was to burn it, but straw burning would bring problems such as environmental damage, public health, and safety hazards. Especially in the southern regions, rice can be planted in multiple seasons, and a large amount of rice straw will be produced in each season, resulting in high labor costs and low efficiency in the harvesting and processing of rice straw.

[0003] Regarding using rice straw as fuel, the existing treatment methods mostly involve direct combustion. However, when directly burning, the rice straw will produce a lot of grass ash. The grass ash is relatively light and cannot stay in the furnace for a long time. But the grass ash retains a high amount of heat energy, and these heat energies will be discharged with the discharge of the grass ash, resulting in waste of heat energy. Therefore, using rice straw as fuel has the defects of low calorific value and a lot of ash.

[0004] The applicant proposes a process of pulverizing and compressing rice straw to form a higher-density form to improve the energy density and combustion efficiency of rice straw. In this preparation process, it is necessary to pulverize the rice straw and then granulate the pulverized material to form pellet fuel. The existing granulation treatments include chemical bonding or high-temperature and high-pressure treatments, with low automation and high costs. To achieve the automated, low-cost production, highly motivated recycling of rice straw, and improve the income of farmers from rice straw recycling, it is necessary to develop a granulation device for pulverized rice straw. Based on this, this case is proposed. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a granulation device for pulverized rice straw, which can realize the granulation of pulverized rice straw at low cost and automatically.

[0006] To achieve the above purpose, the technical solution of the utility model is as follows:

[0007] A granulation device for straw and rice straw powder includes a material pressing cavity, a material pressing rotating shaft, a fixed disk, a material pressing roller, a cutting mechanism and a driving part; the fixed disk is horizontally fixed in the material pressing cavity, the material pressing rotating shaft is arranged vertically, one end of which passes through the fixed disk and is connected with the fixed disk through a bearing, and a horizontally arranged roller connecting shaft is fixed at the end of the material pressing rotating shaft passing through the fixed disk. The material pressing roller is located above the fixed disk and is rotatably connected to the roller connecting shaft. A trumpet-shaped hole with a larger upper part and a smaller lower part is opened on the fixed disk, and the material pressing roller is used to press the straw powder into the trumpet-shaped hole for granulation; the cutting mechanism is arranged below the fixed disk and is used to cut off the straw fuel particles pressed out from below the trumpet-shaped opening; the driving part is used to drive the rotating shaft and the cutting mechanism to act.

[0008] Further, the cutting mechanism includes a movable disk fixed to the rotating shaft and arranged horizontally. A breaking rib is arranged on the disk surface of the movable disk facing the fixed disk, and the breaking rib is used to cut off the straw fuel particles pressed out from below the trumpet-shaped opening.

[0009] Further, the breaking rib is semi-cylindrical and is arranged along the radial direction of the movable disk.

[0010] Further, a particle outlet is opened on the side wall of the material pressing cavity and is located between the fixed disk and the movable disk.

[0011] Further, a blanking groove connecting the particle outlet is arranged on the outer wall of the material pressing cavity.

[0012] The advantages of the present utility model are as follows: By using the cooperation of the orifice plate and the pressing roller, particles with a certain shape and density are formed. Compared with other processes (such as chemical bonding and high-temperature and high-pressure treatment), the physical extrusion method greatly reduces the production cost and is also more environmentally friendly, being suitable for farmers to operate. Description of the Drawings

[0013] Figure 1 It is a three-dimensional structure schematic diagram of the straw and rice straw crushing and granulation equipment in the embodiment;

[0014] Figure 2 It is a three-dimensional structure schematic diagram of the straw and rice straw crushing equipment in the embodiment;

[0015] Figure 3 For Figure 2 A schematic diagram of the structure from another perspective;

[0016] Figure 4 For Figure 3 A schematic diagram of the internal structure;

[0017] Figure 5 It is a schematic diagram of the structure of the crushing tool and the cutting tool in the embodiment;

[0018] Figure 6 It is a schematic diagram of the structure of the crushing tool in the embodiment;

[0019] Figure 7 Explosion schematic diagram of the fixed crushing blade and the movable crushing blade in the crushing tool of the embodiment;

[0020] Figure 8 Structural schematic diagram of the air and material separation unit of the embodiment;

[0021] Figure 9 Cross-sectional schematic diagram of the air and material separation unit of the embodiment;

[0022] Figure 10 Structural schematic diagram of the particle forming unit of the embodiment;

[0023] Figure 11 Internal structural schematic diagram of the particle forming unit of the embodiment;

[0024] Figure 12 Cross-sectional schematic diagram of the particle forming unit of the embodiment;

[0025] Label description

[0026] 1. First conveying unit; 101. Guide cover; 102. Conveyor belt; 103. Tension adjusting mechanism; 104. Protection plate;

[0027] 2. Crushing unit; 201. Crushing chamber; 202. Cutting tool; 2021. Cutting tool rotating shaft; 2022. Cutting blade; 203. Crushing tool; 2031. Crushing tool rotating shaft; 2032. Fixed shaft; 20321. Annular groove; 2033. Movable crushing blade; 20331. Second fixed shaft mounting hole; 20332. Cutting edge; 2034. Fixed crushing blade; 20341. Rotating shaft mounting hole; 20342. First fixed shaft mounting hole; 20343. Cutting edge; 2035. Reinforcing plate; 204. Air supply unit; 205. Screen;

[0028] 3. Suction unit;

[0029] 4. Air and material separation unit; 401. Conical cylinder; 4011. Tangential feed inlet; 402. Exhaust pipe; 403. Guide air duct; 404. Rotary discharge valve; 4041. Discharge blade; 405. First recovery pipe; 406. Second recovery pipe; 407. Bag filter;

[0030] 5. Second conveying unit;

[0031] 6. Particle forming unit; 601. Pressure feeding rotating shaft; 602. Fixed disk; 6021. Flared opening; 603. Rotating disk; 6031. Breaking rib; 604. Pressure feeding roller; 605. Pressure feeding driving part; 606. Pressure roller coupling shaft; 607. Particle outlet; 608. Feeding chute. Specific Embodiments

[0032] The following further describes the present utility model in detail in conjunction with embodiments. It should be understood that the orientation or positional relationships indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. in the text are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model.

[0033] This embodiment proposes a straw crushing and pellet forming device, as Figure 1 shown, which includes a first conveying unit 1, a crushing unit 2, a suction unit 3, a wind and material separation unit 4, a second conveying unit 5 and a pellet forming unit 6.

[0034] As Figure 1 and Figure 4 shown, the first conveying unit 1 includes a conveyor belt 102 and a guide cover 101. The guide cover 101 encloses the conveyor belt 102 and forms a constriction near the crushing unit 2. Workers place the recycled rice on the conveyor belt 102, and the conveyor belt 102 conveys the straw to the crushing unit 2. The constriction formed by the guide cover 101 can concentrate the rice at the input port of the crushing unit 2 to form an effective crushing process. Preferably, a tension adjustment mechanism 103 is provided at the conveyor belt 102 so that the tension of the conveyor belt 102 can be adjusted at any time. As Figure 2 shown, in this embodiment, the motors for driving the crushing unit 2 and the first conveying unit 1 are installed below the conveyor belt 102. To prevent the straw and its powder falling from the gaps in the housing of the first conveying unit 1 from entering the motor and causing motor failure, a protective plate 104 is also provided at the position between the motor and the lower part of the first conveying unit 1 to block the straw and its powder from entering the motor.

[0035] As Figure 4 shown, the crushing unit 2 includes a crushing chamber 201. In the crushing chamber 201, there are a cutting tool 202 and two crushing tools 203. The input port of the crushing chamber 201 receives the output port of the first conveying unit 1. The two crushing tools 203 are arranged vertically. The output port of the crushing chamber 201 is arranged below the lowermost crushing tool 203, and a sieve 205 is installed at the output port. As Figure 5 shown, the cutting tool 202 includes a cutting tool rotating shaft 2021 and a plurality of cutting blades 2022 fixed on the circumference of the cutting tool rotating shaft 202. The cutting blades 2022 cut the straw into multiple small sections and throw them towards the side of the crushing tool 203, which can reduce the crushing pressure on the subsequent crushing tool 203. The crushing tool 203 is used to crush the sectioned straw into powder.

[0036] As Figure 6 and Figure 7 shown, the crushing tool 203 includes a crushing tool rotating shaft 2031, four fixed shafts 2032, five fixed crushing blades 2034 and a plurality of movable crushing blades 2033. The fixed crushing blade 2034 includes a polygonal substrate, a rotating shaft mounting hole 20341 opened in the middle of the substrate, four first fixed shaft mounting holes 20342 opened on the substrate and circumferentially located around the rotating shaft mounting hole 20341, and cutting edges 20343 located on each side of the substrate; the movable crushing blade 2033 is strip-shaped, and includes a second fixed shaft mounting hole 20331 provided at one end and a cutting edge 20332 provided on the edge of the movable crushing blade; the five fixed crushing blades 2034 are arranged in parallel along the axial direction of the crushing tool rotating shaft 2031 and fixed to the crushing tool rotating shaft 2031, the first fixed shaft mounting holes 20342 on adjacent two fixed crushing blades 2034 correspond to each other, the four fixed shafts 2032 pass through the corresponding four first fixed shaft mounting holes 20342 and are fixedly connected to the fixed crushing blade 2034, and a plurality of annular grooves 20321 are opened on the mounting shaft between adjacent two fixed crushing blades 2034, and the movable crushing blade 2033 is movably connected to the annular groove 20321 of the fixed shaft 2032 through the second fixed shaft mounting hole 20331 at the end, and three movable crushing blades 2033 are arranged between a pair of adjacent fixed crushing blades 2034 on one fixed shaft 2032. As Figure 7 shown, the cutting edges 20343 on each side of the substrate include straight edges and serrated edges, and the cutting edge 20332 on the movable crushing blade is a serrated edge.

[0037] The fixed crushing blade 2034 and the movable crushing blade 2033 are used to crush the cut straw into powder. The straight edge on the blade is smooth, continuous, without serrations, and forms a continuous sharp edge as a whole, which is suitable for cutting the softer or medium-hard parts of the straw; the serrated edge on the blade has a serrated concave-convex structure, and each serration has a sharp cutting point, which is particularly suitable for cutting the hard or elastic parts of the straw. The movable setting of the movable crushing blade 2033 causes the movable crushing blade 2033 to radially disperse under the action of centrifugal force when the rotating shaft of the crushing tool 203 rotates, so that the cutting range of the crushing tool 203 is larger. At the same time, when encountering hard objects, it can play a certain buffering role to avoid the movable crushing blade 2033 from being broken. The double-layer crushing tool 203 can fully cut the straw, and at the same time, a sieve 205 is arranged at the bottom to ensure that only the straw powder with a specified particle size can be sucked out for granulation.

[0038] The straw powder is very light and cannot reach the screen 205 smoothly under the rotation of the crushing tool 203. To solve this defect, this embodiment further includes a blowing unit 204. The blowing unit 204 uses a vortex blower. An air inlet is provided on the top surface of the crushing chamber 201, and the air inlet is directly above the uppermost crushing tool 203. The suction port of the blowing unit 204 is used to suck in external air, and the air outlet of the blowing unit 204 is connected to the air inlet on the top surface of the crushing chamber 201, for blowing the straw crushed material on the crushing tool 203 towards the screen 205.

[0039] As Figure 6 shown, preferably, this embodiment further provides a reinforcing plate 2035 between two adjacent fixed crushing blades 2034. Both ends of the reinforcing plate 2035 are fixed to the two fixed crushing blades 2034, and the bottom is fixed to the crushing tool rotating shaft 2031 to improve the overall strength and stability of the crushing tool 203.

[0040] The suction unit 3 uses a turbine fan, whose input port is connected to the output end of the crushing unit 2, for sucking out the straw crushed material that meets the specified particle size, and its output port is connected to the input port of the air and material separation unit 4.

[0041] The air and material separation unit 4 uses a cyclone separator and a rotary discharge valve 404, for receiving the air and straw crushed material output from the suction unit 3 and separating the air and the straw crushed material. The existing cyclone separator is shown in Patent 201922063312.8. A tangential feed inlet 4011 is provided in the upper section of the conical cylinder 401 body. At the same time, an exhaust pipe 402 inserted into the cylinder to a certain depth is installed at the center of the top. An outlet is provided at the bottom of the cylinder. The airflow containing straw powder enters from this feed inlet, and under the guidance of the inner wall of the conical cylinder 401, a downward swirling flow is formed. Under the action of centrifugal force, the particles are thrown towards the cylinder wall. Once the particles contact the cylinder wall, they lose their inertial force and fall towards the outlet under the action of gravity, and the airflow is discharged from the exhaust pipe 402. However, this structure is suitable for particulate matter with a certain weight. For straw powder, due to its light texture, the falling distance relying on gravity is not long, and it is easy to be carried out from the exhaust pipe 402 under the drive of the swirling flow, and fewer particles go out from the lower outlet.

[0042] As an improvement, as Figure 8 and Figure 9As shown in the figure, the cyclone separator includes a conical cylinder 401. The upper end of the conical cylinder 401 is provided with a tangential feed inlet 4011, the bottom is provided with a discharge outlet, and a discharge pipe 402 with one end inserted into the cylinder is installed at the center of the top. The feed inlet of the conical cylinder 401 is connected to the output port of the suction unit 3, the discharge outlet of the conical cylinder 401 is connected to the feed inlet of the rotary discharge valve 404, and the output port of the rotary discharge valve 404 is connected to the feed inlet of the second conveying unit 5. A guiding air duct 403 spirally downward along the inner wall is provided inside the conical cylinder 401. The upper end of the guiding air duct 403 communicates with the feed inlet of the conical cylinder 401, and the lower end extends to the side of the discharge outlet of the conical cylinder 401. Through the guiding of the air duct, the air flow with straw pulverized matter is sent to the bottom of the conical cylinder 401. Some of the straw pulverized matter loses inertia due to hitting the side wall of the air duct in the guiding air duct 403, and then slides out of the air duct along the guiding air duct 403 under its own gravity and the driving of the subsequent air flow and enters the discharge outlet of the conical cylinder 401; some of the pulverized matter rushes out of the guiding air duct 403 under the driving of the swirling flow, loses inertia after hitting the inner wall of the conical cylinder 401, and enters the feed channel of the rotary discharge valve 404 under the action of gravity. After the separated air flow rushes out of the guiding air duct 403, it hits the inner wall and rebounds upward and enters the discharge pipe 402. By setting the spirally downward guiding air duct 403, the straw pulverized matter is guided to the side of the discharge outlet of the conical cylinder 401, shortening the distance for the pulverized matter to drop by gravity, avoiding excessive straw pulverized matter from entering the exhaust duct, and improving the effect of air separation.

[0043] Since there will still be some straw pulverized matter in the air flow discharged from the exhaust pipe, in order to avoid polluting the working environment, the air separation unit 4 of this embodiment includes a first recovery pipe 405 and several second recovery pipes 406. One end of the first recovery pipe 405 is connected to the end of the discharge pipe 402 exposed outside the conical cylinder 401. A number of blanking holes arranged along the pipeline direction are provided on the side wall of the first recovery pipe 405. One end of the second recovery pipe 406 is connected to the blanking hole of the first recovery pipe 405. A bag filter 407 is connected to the end of the first recovery pipe 405 far from the discharge pipe 402 and the end of the second recovery pipe 406 far from the blanking hole. Through the bag filter 407 (hessian bags or cloth bags can be used as filter bags for straw pulverized matter), the straw pulverized matter in the air flow can be collected and the air can be filtered out, thus ensuring the cleanliness of the working environment. By setting multiple second recovery pipes 406 to connect multiple bag filters 407, part of the air flow can enter the second recovery pipe 406, which can weaken the pressure of the air flow discharged from the exhaust pipe in segments and avoid the excessive air flow force from affecting the filtering effect of the bag filter 407.

[0044] The rotary discharge valve 404 includes a horizontally arranged cylindrical housing, a discharge rotating shaft, and a discharge driving part. The discharge rotating shaft is arranged along the axial direction of the housing, and one end extends out of the housing and is connected to the discharge driving part. The upper end of the housing is provided with a feed channel connected to the discharge port of the conical cylinder 401, and the lower end of the housing is provided with a discharge channel connected to the feed port of the second conveying unit 5. Four discharge blades 4041 are evenly distributed on the discharge rotating shaft. The end of the discharge blade 4041 far from the discharge rotating shaft is in clearance fit with the inner wall of the housing. The central angle of the inner wall of the housing between the feed port and the discharge port is greater than the included angle between two adjacent discharge blades 4041.

[0045] Due to the clearance fit between the discharge blade 4041 and the inner wall of the housing, effective blocking can be achieved, preventing the airflow from the upper conical cylinder 401 from entering the discharge channel of the rotary discharge valve 404. And the central angle of the inner wall of the housing between the feed port and the discharge port is greater than the included angle between two adjacent discharge blades 4041, ensuring that no matter how the discharge blade 4041 rotates, there will always be two opposite discharge blades 4041 blocking the airflow. As Figure 9 shown, in this embodiment, the central angle of the inner wall of the cylindrical housing between the feed channel and the discharge channel is 136°, and the included angle between two adjacent discharge blades 4041 is 90°, thus ensuring that the inner wall of the cylindrical housing between the feed channel and the discharge channel will always cooperate with the discharge blade 4041 to block the airflow.

[0046] The straw pulverized matter falling from the conical cylinder 401 accumulates between two adjacent upper discharge blades 4041. After the discharge blade 4041 rotates, the straw pulverized matter accumulated between two adjacent upper discharge blades 4041 is poured downward into the discharge channel of the rotary discharge valve 404.

[0047] As Figure 1 and Figure 10 shown, the second conveying unit 5 in this embodiment adopts a screw feeder, which is used to receive the straw pulverized matter separated from the air separation unit 4 and convey it to the pellet forming unit 6.

[0048] As Figures 10 to 12As shown in the figure, the pellet forming unit 6 includes a material pressing cavity, a material pressing rotating shaft 601, a fixed disk 602, a rotating disk 603, a material pressing roller 604 and a material pressing driving part 605. The fixed disk 602 is horizontally fixed in the material pressing cavity. The rotating disk 603 is located below the fixed disk 602, and the material pressing roller 604 is located above the fixed disk 602. The material pressing rotating shaft 601 is arranged vertically. One end of it passes through the rotating disk 603 and the fixed disk 602, and is connected to the rotating disk 603 through a keyway and to the fixed disk 602 through a bearing. The other end is connected to the material pressing driving part 605 for transmission. A horizontally arranged roller connecting shaft 606 is fixed at one end of the material pressing rotating shaft 601 passing through the fixed disk 602. The material pressing roller 604 is rotatably connected to the roller connecting shaft 606. In this embodiment, there are two material pressing rollers 604 and they are symmetrically arranged. The fixed disk 602 is provided with a trumpet-shaped hole that is larger at the top and smaller at the bottom. On the surface of the movable disk facing the fixed disk 602, there are two breaking rib strips 6031 that are symmetrically arranged. The breaking rib strips 6031 are semi-cylindrical and are arranged along the radius direction of the movable disk. The material pressing cavity is provided with a pellet outlet 607 between the fixed disk 602 and the movable disk, and a blanking chute 608 is arranged at the pellet outlet 607 at the same time.

[0049] The second conveying unit 5 conveys the rice straw powder to the fixed disk 602. When the material pressing rotating shaft 601 rotates, it drives the material pressing roller 604 and the rotating disk 603 to rotate around the axis. During the rotation of the material pressing roller 604 around the axis, under the action of friction, it will rotate on its own. During the above rotation process, the material pressing roller 604 presses the rice straw powder into the trumpet-shaped hole. As the powder is continuously compacted and bonded, the compacted and bonded powder forms short columnar pellets and extends out from below the trumpet-shaped opening 6021. During the rotation of the rotating disk 603, the breaking rib strips 6031 also rotate around the axis. When the short columnar pellets extend downward by a certain length, they can be broken by the rotating breaking rib strips 6031 and pushed to the pellet outlet 607 to realize the discharging of the rice straw fuel pellets.

[0050] The processing technology of this rice straw crushing and pellet forming equipment includes the following steps:

[0051] S1. Workers put the recycled rice straw on the conveyor belt 102. Under the guidance of the outer guiding cover 101, the conveyor belt 102 sends the rice straw to the side of the cutting tool 202. The cutting tool 202 cuts the rice straw into small sections, and at the same time the cutting blade 2022 pushes the cut rice straw towards the crushing tool 203.

[0052] S2. The crushing tool 203 crushes the small sections of rice straw, and at the same time blows the rice straw crushing material to the output port of the crushing unit 2 through the blowing equipment.

[0053] S3. Through the screen 205 and the suction unit 3, the rice straw crushing material that meets the specified size is suctioned to the air separation unit 4.

[0054] S4. The wind and straw pulverized matter are separated by the wind and straw separation unit 4. The separated wind is discharged through the exhaust duct, and the separated straw pulverized matter is conveyed to the pellet forming unit 6;

[0055] S5. The pellet forming unit 6 compacts the straw pulverized matter into pellets and outputs them.

[0056] The above embodiments are only used to explain the concept of the present invention, rather than limiting the protection scope of the rights of the present invention. Any non-substantive changes made to the present invention using this concept shall fall within the protection scope of the present invention.

Claims

1. A granulation device for pulverized straw stalks, characterized in that, It includes a blank holding cavity, a blank holding rotating shaft, a fixed disk, a blank holding roller, a cutting mechanism and a driving part; The fixed disk is horizontally fixed in the blank holding cavity. The blank holding rotating shaft is vertically arranged. One end of it passes through the fixed disk and is connected to the fixed disk through a bearing. A horizontally arranged roller coupling shaft is fixed at the end of the blank holding rotating shaft that penetrates the fixed disk. The blank holding roller is located above the fixed disk and is rotatably connected to the roller coupling shaft. A trumpet-shaped hole that is larger at the top and smaller at the bottom is formed on the fixed disk. The blank holding roller is used to press the rice straw powder into the trumpet-shaped hole for granulation; The cutting mechanism is arranged below the fixed disk and is used to cut off the rice straw fuel particles pressed out from below the trumpet-shaped opening; The driving part is used to drive the rotating shaft and the cutting mechanism to act.

2. The granulation device for pulverized straw stalks according to claim 1, characterized in that, The cutting mechanism includes a movable disk that is fixed to the rotating shaft and is horizontally arranged. Interrupting ribs are arranged on the surface of the movable disk facing the fixed disk. The interrupting ribs are used to cut off the rice straw fuel particles pressed out from below the trumpet-shaped opening.

3. A granulation device for straw and straw pulverized powder according to claim 2, characterized in that, The interrupting ribs are semi-cylindrical and are arranged along the radial direction of the movable disk.

4. The granulation device for pulverized straw stalks according to claim 2, characterized in that, A particle outlet is formed on the side wall of the blank holding cavity between the fixed disk and the movable disk.

5. The granulation device for pulverized straw stalks according to claim 2, characterized in that, A blanking groove connecting to the particle outlet is arranged on the outer wall of the blank holding cavity.

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