CN216348133U

CN216348133U - Plasma arc high-temperature silencing type cartridge case primer destroying device

Info

Publication number: CN216348133U
Application number: CN202122676747.7U
Authority: CN
Inventors: 傅强; 王健; 苏硕仕
Original assignee: Jiangsu Junzhi Additive Aviation Technology Co ltd
Current assignee: Jiangsu Junzhi Additive Aviation Technology Co ltd
Priority date: 2021-11-03
Filing date: 2021-11-03
Publication date: 2022-04-19
Anticipated expiration: 2031-11-03

Abstract

The utility model relates to a plasma arc high-temperature silencing type cartridge case primer destroying device which comprises a rack, wherein a conveying mechanism, a heating percussion device, a blanking channel and a control operation panel are arranged on the rack; the conveying mechanism is provided with a feeding end and a discharging end; the conveying mechanism is provided with a cartridge case triggering position; the transmission mechanism is provided with a percussion hole at one end of the cartridge case percussion position, and a silencing port at the other end of the cartridge case percussion position; the two ends of the shell firing position of the transmission mechanism are respectively provided with a shell clamping mechanism; the heating percussion device is arranged at the outer side of the percussion hole and is provided with a plasma arc output head corresponding to the percussion hole; still be equipped with silencing device in the frame, silencing device locates the outside of amortization mouth and communicates with the amortization mouth. The equipment can automatically run, so that the speed and reliability of eliminating the primer of the cartridge case are improved, and the labor intensity is greatly reduced; the plasma arc is adopted to detonate the primer of the cartridge case at high temperature, so that the primer can be completely eliminated, and the destruction process is more reliable.

Description

Plasma arc high-temperature silencing type cartridge case primer destroying device

Technical Field

The utility model relates to a plasma arc high-temperature silencing type cartridge case primer destroying device, and belongs to the technical field of military and civil integration and weapon industry.

Background

To the applicant's knowledge, a large number of various case-charge ammunition are produced annually for the purpose of ensuring the need for defense, and after the life of the ammunition is exceeded, destruction is required to ensure the reliability and safety of the equipment and to reduce inventory, wherein case primer destruction is one of the keys to ammunition destruction.

The existing method for destroying the primer of the cartridge case mainly comprises three modes of centralized cartridge case blasting, manual cartridge case primer demolition, primer blasting and manual impact primer ignition to remove the primer, the methods have high labor intensity and low safety and elimination efficiency, the primer cannot be completely detonated, destruction failure is caused, new potential safety hazards are caused, and the speed of eliminating the primer is far away from the speed requirement of scrapping the cartridge case, so that overstock of the expired cartridge case is caused.

Through search, the utility model patents of patent numbers CN201611082644.5 and CN106767198B disclose a shell case disassembling device and a disassembling method thereof, wherein the shell case disassembling device comprises a shell carrying device, a heating device and a control device; the electric control part of the bullet loading device and the electric control part of the heating device are electrically connected with the control device; the heating device is arranged outside the cartridge loading device and is used for heating the cartridge case to be treated entering the cartridge loading device so that the primer in the primer of the cartridge case to be treated reaches the ignition point of the primer under the action of high temperature. However, the technical solution is disadvantageous in that each batch of a plurality of cartridges is processed to cause the primer to be heated and burned, which easily causes the enclosed space to be subjected to explosion impact, which puts high demands on the material of the device constituting the enclosed space, and the service life of the device is obviously shortened after a plurality of explosion impacts.

SUMMERY OF THE UTILITY MODEL

The main purposes of the utility model are: the plasma arc high-temperature silencing type cartridge case primer destroying equipment can automatically operate, remarkably improves the removal speed and reliability of the cartridge case primer, and greatly reduces the labor intensity.

The technical scheme for solving the technical problems of the utility model is as follows:

a plasma arc high-temperature silencing type cartridge case primer destroying device comprises a rack, wherein a conveying mechanism, a heating firing device, a discharging channel and a control operation panel with a controller are arranged on the rack; the conveying mechanism is provided with a feeding end and a discharging end, and the discharging end corresponds to the blanking channel; the automatic feeding device is characterized in that the conveying mechanism is provided with a cartridge case triggering position, and the cartridge case triggering position is close to the discharging end of the conveying mechanism; the transmission mechanism is provided with a firing hole at one end of the cartridge case firing position, and is provided with a silencing port at the other end of the cartridge case firing position, and the firing hole and the silencing port are opposite to each other; the two ends of the cartridge case firing position of the conveying mechanism are respectively provided with a cartridge clamping mechanism; the heating firing device is arranged at the outer side of the firing hole and is provided with a plasma arc output head corresponding to the firing hole; the frame is also provided with a silencing device which is arranged outside the silencing port and communicated with the silencing port; the controlled end of the transmission mechanism and the controlled end of the heating firing device are respectively connected with the control end of the controller.

The equipment automatically runs under the control of the controller, and control parameters can be adjusted by controlling the operation panel. When the shell conveying device operates, the conveying mechanism continuously conveys all the shells from the feeding end to the discharging end; each cartridge case enters the cartridge case percussion position and is stably limited by the cartridge case clamping mechanism, at the moment, the conveying mechanism stops slightly, the heating percussion device emits plasma arc to heat and detonate the cartridge case primer, and deflagration gas in the cartridge case is flushed into the silencing device through the silencing opening to be silenced. The device can run in a full-automatic manner, the efficiency of destroying the primer of the cartridge case is obviously improved, and the labor intensity is greatly reduced; meanwhile, whether primer is detonated or not can be detected and known in the destroying process, so that the destroying process is more reliable.

The technical scheme of the utility model is further perfected as follows:

preferably, the conveying mechanism comprises a driving motor, a pair of tension wheels, a rotary chain and a group of arrangement grooves, and the arrangement grooves are U-shaped; the rotary chain is sleeved on the tension wheel in a tensioning manner, the driving motor is in transmission connection with the tension wheel, the placing grooves are respectively and fixedly connected with the rotary chain, and the placing grooves are parallel to each other and vertical to the rotary chain; the cartridge case firing position is parallel to or coincided with the containing groove; the conveying mechanism is provided with limit baffles on two sides of the rotary chain respectively, and the percussion hole and the silencing port are located on the corresponding limit baffles respectively.

After adopting this preferred structure, can further optimize transport mechanism's concrete structure, wherein, the resettlement groove is used for placing the shell case, and the shell case bottom is towards the limit baffle that the percussion hole was located.

Preferably, the bullet clamping mechanism comprises two limiting angle-shaped components, and the limiting angle-shaped components are respectively and fixedly connected with the limiting baffle and respectively form a groove with the limiting baffle; the two limit angle-shaped components are symmetrically distributed on the upper side and the lower side of the percussion hole or the silencing opening, and the notches of the two grooves are opposite to each other.

More preferably, the limit angle-shaped member is formed by fixedly connecting a first plate and a second plate respectively; an included angle is formed between the first plate and the second plate; the side edge of the first plate, which is far away from the second plate, is fixedly connected with the limiting baffle; the side edge of the second plate, which is far away from the first plate, is formed by connecting two straight edges and an arc-shaped edge, and the two straight edges are obliquely arranged and symmetrically distributed on two sides of the arc-shaped edge; the side edges of the second plate of the two limiting angle-shaped components are opposite to each other and have a distance between the side edges to form a bayonet, and the bayonet consists of an inlet, a middle opening and an outlet; the inlet is formed by straight edges which are positioned on one side of the arc-shaped edge and opposite to each other in the side edges of the second plates of the two limiting angle-shaped components, and the tail end with the smallest caliber is connected with the middle port; the middle opening is formed by arc edges in the side edges of the second plates of the two limiting angle-shaped components, the openings of the arc edges of the middle opening are opposite to each other, and the symmetrical axis of the arc edges is coaxial with the percussion hole or the silencing opening; the outlet is formed by straight edges which are positioned on the other side of the arc-shaped edge and opposite to each other in the side edges of the second plates of the two limiting angle-shaped components, and the outlet is in a necking shape opposite to the inlet in direction, and the tail end with the smallest caliber is connected with the middle opening.

More preferably, the limiting angle-shaped member is provided with a group of stress holes at the joint of the first plate and the second plate, and the stress holes are symmetrically distributed on two sides of the arc-shaped edge.

More preferably, an included angle formed between the first plate and the second plate is a right angle; the first plate is arranged horizontally, and the second plate is arranged vertically.

More preferably, the cartridge jamming mechanism is a cartridge case top cartridge jamming mechanism or a cartridge case bottom cartridge jamming mechanism; when the cartridge jamming mechanism is a cartridge case top cartridge jamming mechanism, the middle opening is matched with the top of the cartridge case; when the bullet clamping mechanism is a bullet clamping mechanism at the bottom of the bullet shell, the middle opening is matched with the bottom of the bullet shell.

After the preferred structure more than adopting, can further optimize the concrete structure of card bullet mechanism, can stabilize spacing to the shell case that gets into shell case percussion position better, prevent that it from shifting the jump and take off behind detonating the primer. The bayonet adopts a targeted design, so that the cartridge case can be conveniently guided, and the stability of limiting can be ensured; the stress hole can timely eliminate the impact formed after the cartridge case primer is detonated, and the service life of the cartridge blocking mechanism is prolonged.

Preferably, the heating firing device is a plasma cutting gun with a water cooling structure.

After the preferred structure is adopted, the specific structure of the heating firing device can be further optimized, and the instantaneous heating to the high temperature of more than 800 ℃ within the range of 8 mm of the diameter can be further realized, so that the primer of the cartridge case can be detonated (the temperature can be detonated when reaching more than 250 ℃).

Preferably, the muffler device is an electric disc muffler, and the muffler device is provided with an air inlet side which is communicated with the muffler opening; the controlled end of the silencing device is connected with the control end of the controller; and the rack is also provided with a protective cover at least covering the silencing device and the cartridge case percussion position.

After the optimized structure is adopted, the specific structure of the silencer can be further optimized; the electric disc type silencer can save occupied space of components, and can be controlled by the controller to rotate so as to match the process of igniting the primer of the cartridge case.

Preferably, the controller is a PLC; the control operation panel is provided with a touch screen; the frame is provided with a shock-absorbing wear-resistant layer; the conveying mechanism is provided with a shell sliding chute at the feeding end of the conveying mechanism, and the shell sliding chute is communicated with the feeding end.

With this preferred construction, further technical details of the device can be optimized.

Compared with the prior art, the utility model has the following beneficial effects:

the equipment can automatically run, so that the speed and reliability of eliminating the primer of the cartridge case are improved, and the labor intensity is greatly reduced; the adoption plasma arc high temperature explodes cartridge case primer, can eliminate the primer completely, need sort and fail the cartridge case of primer and carry out the situation of secondary percussion to it when avoiding adopting the striking to destroy the primer to make the destruction process more reliable.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention.

Fig. 2 is a schematic overall structure diagram of the embodiment of the present invention from another view angle. Note: some parts are omitted from the figure.

FIG. 3 is a schematic view of a heated firing device in an embodiment of the present invention.

Fig. 4 is a schematic view of a silencer according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of a cartridge locking mechanism according to an embodiment of the utility model.

Detailed Description

The utility model is described in further detail below with reference to embodiments and with reference to the drawings. The utility model is not limited to the examples given.

Examples

As shown in fig. 1 to 5, the plasma arc high temperature silencing cartridge case primer destroying device of the present embodiment includes a frame 01, wherein the frame 01 is provided with a conveying mechanism 02, a heating firing device 03, a discharging channel 04, and a control operation panel 05 with a controller; the conveying mechanism 02 is provided with a feeding end 06 and a discharging end 07, and the discharging end 07 corresponds to the blanking channel 04; the conveying mechanism 02 is provided with a cartridge case triggering position 08, and the cartridge case triggering position 08 is close to the discharging end 07 of the conveying mechanism 02; the transmission mechanism 02 is provided with a percussion hole 09 at one end of the cartridge case percussion position 08, a silencing port 10 at the other end of the cartridge case percussion position 08, and the percussion hole 09 and the silencing port 10 are opposite to each other; the two ends of the cartridge case percussion position 08 of the transmission mechanism 02 are respectively provided with a cartridge clamping mechanism 11; the heating and firing device 03 is arranged at the outer side of the firing hole 09, and the heating and firing device 03 is provided with a plasma arc output head 12 corresponding to the firing hole 09; the frame 01 is also provided with a silencing device 13, and the silencing device 13 is arranged on the outer side of the silencing port 10 and communicated with the silencing port 10; the controlled end of the transmission mechanism 02 and the controlled end of the heating firing device 03 are respectively connected with the control end of the controller.

Specifically, the conveying mechanism 02 comprises a driving motor 14, a pair of tension pulleys 15, a revolving chain 16 and a group of arrangement grooves 17, wherein the arrangement grooves 17 are U-shaped; the rotary chain 16 is sleeved on the tension wheel 15 in a tensioning manner, the driving motor 14 is in transmission connection with the tension wheel 15, the arrangement grooves 17 are respectively fixedly connected with the rotary chain 16, and the arrangement grooves 17 are parallel to each other and are perpendicular to the rotary chain 16; the cartridge case firing position 08 is parallel to or coincident with the containing groove 17; the conveying mechanism 02 is provided with limit baffles 18 on both sides of the revolving chain 16, and the percussion hole 09 and the silencing opening 10 are respectively located on the corresponding limit baffles 18.

Specifically, the bullet clamping mechanism 11 includes two limit angle-shaped members 19, and the limit angle-shaped members 19 are respectively and fixedly connected with the limit baffle 18 and respectively form a groove 20 with the limit baffle 18; the two limit angle shaped members 19 are symmetrically distributed on the upper and lower sides of the firing hole 09 or the silencing opening 10, and the notches of the two grooves 20 are opposite to each other.

The limiting angle-shaped component 19 is respectively formed by fixedly connecting a first plate 21 and a second plate 22; an included angle is formed between the first plate 21 and the second plate 22; the side edge of the first plate 21 departing from the second plate 22 is fixedly connected with the limit baffle 18; the side edge of the second plate 22 departing from the first plate 21 is formed by connecting two straight edges and an arc-shaped edge, and the two straight edges are obliquely arranged and symmetrically distributed on two sides of the arc-shaped edge; the above-mentioned sides of the second plates 22 of the two stop angle members 19 are opposite to each other and spaced from each other to form a bayonet 23, the bayonet 23 being formed by an inlet port 24, an intermediate port 25 and an outlet port 26; the inlet port 24 is formed by straight edges which are positioned at one side of the arc-shaped edges and are opposite to each other among the side edges of the second plate 22 of the two limiting angle-shaped members 19, and the tail end of the inlet port 24 which is in a necking shape and has the smallest caliber is connected with the middle port 25; the middle opening 25 is formed by the arc edges in the side edges of the second plates 22 of the two limit angle-shaped components 19, the openings of the arc edges of the middle opening 25 are opposite to each other, and the symmetry axis of the arc edges is coaxial with the firing hole 09 or the sound attenuation opening 10; the exit 26 is formed by straight edges opposite to each other and located on the other side of the arc-shaped edge among the above-mentioned side edges of the second plate 22 of the two limit angle members 19, and the exit 26 is in a reduced shape opposite to the direction of the entrance 24, and the end with the smallest caliber is connected to the intermediate port 25.

Wherein, the limit angle member 19 is provided with a group of stress holes 27 at the joint of the first plate 21 and the second plate 22, and the stress holes 27 are symmetrically distributed at two sides of the arc-shaped edge. The included angle formed between the first plate 21 and the second plate 22 is a right angle; the first plate 21 is arranged horizontally and the second plate 22 is arranged vertically. The cartridge clamping mechanism 11 is a cartridge shell top cartridge clamping mechanism 11 or a cartridge shell bottom cartridge clamping mechanism 11; when the cartridge jamming mechanism 11 is the cartridge case top cartridge jamming mechanism 11, the middle opening 25 is matched with the top of the cartridge case; when the cartridge jamming mechanism 11 is the cartridge case bottom cartridge jamming mechanism 11, the middle opening 25 is matched with the cartridge case bottom.

Specifically, the heating and firing device 03 is a plasma cutting torch having a water-cooling structure. The plasma cutting gun adopts a commercial product, can be instantly heated to a high temperature of more than 800 ℃ within a diameter range of 8 mm, and the bottom of the cartridge case is heated by the high temperature, so that the temperature of the primer of the cartridge case can be rapidly raised to more than 250 ℃, the propellant powder arranged in the primer is decomposed (i.e. exploded) due to the high temperature, and the phenomenon of misfiring can be thoroughly solved. Meanwhile, the plasma cutting gun does not need any combustible gas or substance for assistance, only forms an electric arc generated by plasma through air ionization, and has no danger; the arc length of the plasma arc is only about 10mm, and the plasma is converted into air after the high-temperature action of the primer, so that no danger exists.

The silencer 13 is an electric disc type silencer, and the silencer 13 is provided with an air inlet side which is communicated with the silencer opening 10; the controlled end of the silencer 13 is connected with the control end of the controller; the frame 01 is also provided with a protective cover 28 which covers at least the silencing device 13 and the cartridge case firing position 08.

In addition, the controller is a PLC; the control operation panel 05 has a touch panel; the frame 01 is provided with a shock absorption wear-resistant layer 29; the conveying mechanism 02 is provided with a cartridge case chute 30 at a feed end 06 thereof, and the cartridge case chute 30 is communicated with the feed end 06.

The specific use process of this embodiment is as follows:

before the use, the staff sets up control parameter through the touch-sensitive screen of control operation panel 05, lets the follow-up automatic operation that can smoothly under the control of controller of equipment.

When the device is used, a worker puts the cartridge case into the cartridge case chute 30, so that the cartridge case slides into each accommodating groove 17 from the feeding end 06 of the conveying mechanism 02; the conveying mechanism 02 continuously conveys all the cartridge cases from the feeding end 06 to the discharging end 07; when each cartridge case enters the cartridge case percussion position 08, the cartridge case is stably limited by the cartridge clip mechanism 11 to prevent the cartridge case from jumping off, at the moment, the transmission mechanism 02 is slightly stopped, the bottom of the cartridge case is aligned with the percussion hole 09, the top of the cartridge case is aligned with the silencing port 10, the heating percussion device 03 emits plasma arc for heating and detonating the primer of the cartridge case, and the deflagration gas in the cartridge case rushes into the silencing device 13 through the silencing port 10 for silencing; the transfer mechanism 02 then continues to operate to deliver the cartridge cases to the discharge end 07 and into the discharge chute 04 for collection.

In the process, the controller can carry out matching control on the running speed of the transmission mechanism, the plasma arc ignition time, the rotation of the silencing disc and the like.

The equipment of the embodiment can automatically operate, so that the speed and reliability of eliminating the primer of the cartridge case are improved, and the labor intensity is greatly reduced; the adoption plasma arc high temperature explodes cartridge case primer, can eliminate the primer completely, need sort and fail the cartridge case of primer and carry out the situation of secondary percussion to it when avoiding adopting the striking to destroy the primer to make the destruction process more reliable. The plasma arc high temperature is adopted to directly heat the cartridge case primer, the primer heating rate is very high, and the destruction speed is as fast as 3000 rounds per hour.

It should be noted that the control operation panel 05 with the controller can implement the control function by adopting a conventional structure in the prior art, and therefore, the description is omitted in this embodiment.

In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.

Claims

1. A plasma arc high-temperature silencing type cartridge case primer destroying device comprises a rack, wherein a conveying mechanism, a heating firing device, a discharging channel and a control operation panel with a controller are arranged on the rack; the conveying mechanism is provided with a feeding end and a discharging end, and the discharging end corresponds to the blanking channel; the automatic feeding device is characterized in that the conveying mechanism is provided with a cartridge case triggering position, and the cartridge case triggering position is close to the discharging end of the conveying mechanism; the transmission mechanism is provided with a firing hole at one end of the cartridge case firing position, and is provided with a silencing port at the other end of the cartridge case firing position, and the firing hole and the silencing port are opposite to each other; the two ends of the cartridge case firing position of the conveying mechanism are respectively provided with a cartridge clamping mechanism; the heating firing device is arranged at the outer side of the firing hole and is provided with a plasma arc output head corresponding to the firing hole; the frame is also provided with a silencing device which is arranged outside the silencing port and communicated with the silencing port; the controlled end of the transmission mechanism and the controlled end of the heating firing device are respectively connected with the control end of the controller.

2. The plasma arc high temperature muffling type cartridge case primer destruction equipment according to claim 1, wherein the conveying mechanism comprises a driving motor, a pair of tension pulleys, a rotating chain and a group of placing grooves, and the placing grooves are U-shaped; the rotary chain is sleeved on the tension wheel in a tensioning manner, the driving motor is in transmission connection with the tension wheel, the placing grooves are respectively and fixedly connected with the rotary chain, and the placing grooves are parallel to each other and vertical to the rotary chain; the cartridge case firing position is parallel to or coincided with the containing groove; the conveying mechanism is provided with limit baffles on two sides of the rotary chain respectively, and the percussion hole and the silencing port are located on the corresponding limit baffles respectively.

3. The plasma arc high temperature silencing type cartridge case primer destruction device according to claim 2, wherein the cartridge locking mechanism comprises two limiting angle-shaped members, the limiting angle-shaped members are respectively fixedly connected with the limiting baffle and respectively form a groove with the limiting baffle; the two limit angle-shaped components are symmetrically distributed on the upper side and the lower side of the percussion hole or the silencing opening, and the notches of the two grooves are opposite to each other.

4. The plasma arc high temperature silencing cartridge case primer destruction device according to claim 3, wherein the limiting angular member is formed by fixedly connecting a first plate and a second plate respectively; an included angle is formed between the first plate and the second plate; the side edge of the first plate, which is far away from the second plate, is fixedly connected with the limiting baffle; the side edge of the second plate, which is far away from the first plate, is formed by connecting two straight edges and an arc-shaped edge, and the two straight edges are obliquely arranged and symmetrically distributed on two sides of the arc-shaped edge; the side edges of the second plate of the two limiting angle-shaped components are opposite to each other and have a distance between the side edges to form a bayonet, and the bayonet consists of an inlet, a middle opening and an outlet; the inlet is formed by straight edges which are positioned on one side of the arc-shaped edge and opposite to each other in the side edges of the second plates of the two limiting angle-shaped components, and the tail end with the smallest caliber is connected with the middle port; the middle opening is formed by arc edges in the side edges of the second plates of the two limiting angle-shaped components, the openings of the arc edges of the middle opening are opposite to each other, and the symmetrical axis of the arc edges is coaxial with the percussion hole or the silencing opening; the outlet is formed by straight edges which are positioned on the other side of the arc-shaped edge and opposite to each other in the side edges of the second plates of the two limiting angle-shaped components, and the outlet is in a necking shape opposite to the inlet in direction, and the tail end with the smallest caliber is connected with the middle opening.

5. The plasma arc high temperature muffling type cartridge case primer destruction device according to claim 4, wherein the limiting angle member is provided with a set of stress holes at the joint of the first plate and the second plate, and the stress holes are symmetrically distributed on two sides of the arc-shaped edge.

6. The plasma arc high temperature muffling type cartridge case primer destruction device according to claim 4, wherein an included angle formed between the first plate and the second plate is a right angle; the first plate is arranged horizontally, and the second plate is arranged vertically.

7. The plasma arc high temperature silencing type cartridge case primer destruction device according to claim 4, wherein the cartridge jamming mechanism is a cartridge case top cartridge jamming mechanism or a cartridge case bottom cartridge jamming mechanism; when the cartridge jamming mechanism is a cartridge case top cartridge jamming mechanism, the middle opening is matched with the top of the cartridge case; when the bullet clamping mechanism is a bullet clamping mechanism at the bottom of the bullet shell, the middle opening is matched with the bottom of the bullet shell.

8. The plasma arc high temperature silencing cartridge case primer destruction equipment according to any one of claims 1 to 7, wherein the heating firing device is a plasma cutting gun with a water cooling structure.

9. The plasma arc high temperature muffling type cartridge case primer destruction equipment according to any one of claims 1 to 7, wherein the muffling device is an electric disc muffler, the muffling device is provided with an air inlet side, and the air inlet side is communicated with a muffling opening; the controlled end of the silencing device is connected with the control end of the controller; and the rack is also provided with a protective cover at least covering the silencing device and the cartridge case percussion position.

10. The plasma arc high temperature muffling cartridge case primer destruction device according to any one of claims 1 to 7, wherein the controller is a PLC; the control operation panel is provided with a touch screen; the frame is provided with a shock-absorbing wear-resistant layer; the conveying mechanism is provided with a shell sliding chute at the feeding end of the conveying mechanism, and the shell sliding chute is communicated with the feeding end.