CN103857470A

CN103857470A - Pulverizing and shaping device and method

Info

Publication number: CN103857470A
Application number: CN201280049514.5A
Authority: CN
Inventors: 胡心宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-10-08
Filing date: 2012-02-17
Publication date: 2014-06-11
Anticipated expiration: 2032-02-17
Also published as: WO2013049977A1; CN103857470B; CN103028478A

Abstract

A pulverizing and shaping device, comprises a cavity capable of changing between multiple shapes under an external force; in the shape changing process, the cavity shapes the powder particles therein under the force; the cavity is provided with a channel for feeding and/or discharging materials in the shaping process. A pulverizing and shaping method, comprising the following steps: a) filling the powder particles to be processed into the cavity, the cavity being provided with a channel for feeding and/or discharging materials in the shaping process; and b) applying an external force onto the cavity, causing the cavity to repeatedly change between multiple shapes, so that the powder particles in the cavity are shaped under the force, and the cavity allows feeding and/or discharging materials in the shaping process. The device or method of the present invention is of stable processing strength, high efficiency, and strong controllability over the extent of material processing.

Description

Pulverizing and shaping device and method

Specification

It is to say October 8 in 2011 this application claims the applying date, Application No. " 201110294947. 4 ", the priority of the earlier application of entitled " method and apparatus of powder granule shaping ".Technical field

The present invention relates to material shaping processing, more particularly to a kind of apparatus and method crushed with shaping.Background technology

Crushing material and grinding are the important contents of powder technology, and it is widely used in the every field of national economy, and material is modified processing and can optimize material property or realize specific function.The Morphological control of material particles is that the working process that has expected purpose is carried out to the contoured surface of particle, is the intermediate link for improving some product final performances to realize the specific function of particle monomer or entirety.Relatively sphericalization can improve tap density, packed density and mobility of powder etc., spheroidization such as cement powder particles can improve cement performance, metal ink spheroidizing of particles can increase reflectance, printing quality is improved, copper powder, graphite, the glass putty of spheroidization show superiority in its specific application field.Crushing material, powder surface shaping or Morphological control have a number of ways, mechanical conventional cosmetic method is generally using rolling, rolling, ball milling, vibration（That is vibro-grinding）Mode.It is to insert powder in one annular groove to roll, and heap powder-deposit is rolled around central axis by circular pressure roller driven, and roller is rolled over similar to its, and simply material under eminence by falling between two rollers, and bears double roller pressure.Rolling is to fall into powder agglomerate to be parallel to each other and crush and shaping between the roll with certain interval.Ball milling is to be put into after the big and wear-resisting mill ball of powder and hardness is mixed by a certain percentage in drum, drum rotates along axle, mill ball in drum is elevated and then fallen in staving rotary course, so that powder is impacted and makes mutually stress and friction between particle.Vibration mode is similar to ball milling method, and difference is to be moved back and forth along single direction with certain frequency in vibration staving, so that mill ball is impacted and ground to material.Recent Ye You Tsing-Hua University patent, describes a kind of method and apparatus for carrying out spheroidization or Morphological control to powder by the way of high-speed striking, shearing. The mixture of abrasive media is processed the stage in the presence of the part with air contact effective, that is, there is a situation where " to open " or " fractional open ", during material is acted on, and pressure or impulsive force can be released or part release.For the material of relative " softer " or " harder ", such as there is the metallic particles of toughness, because the absolute dynamics and controllability of working process are limited, it is difficult to produce a desired effect and desired efficiency.In addition, all there is the separation problem of mill ball and processed powder in non-circulating type ball milling and vibro-grinding, and with the continuous consumption of mill ball, processing intensity will change, this brings uncertainty to processing technology, in addition, also having using centrifugal force to increase the grinding of processing dynamics, but so equally exist the cost paid and the finally high limitation of obtained effect ratio.Moreover, noise problem, the energy consumption for driving equipment body and mill ball to move waste problem and are all difficult to overcome.In these defects, controllability and energy consumption are most importantly processed.The content of the invention

It is an object of the invention to provide it is a kind of crush with the apparatus and method of shaping, its processing dynamics controllability to material is strong, processes intensity stabilization, efficiency high.To achieve the above object, the present invention uses following technical scheme：One kind is crushed and apparatus for shaping, it is characterized in that, including the cavity that can be changed by external force between variform, the cavity makes the effect of the powder granule stress inside it and is shaped in the change procedure of form, the cavity have be used in reforming process for material into and/or out of passage.One kind is crushed and shaping methods, it is characterised in that comprised the following steps：

A. powder particle to be processed is filled into cavity, the cavity have be used in reforming process for material into and/or out of passage；

B. applying external force to the cavity makes it change repeatedly between variform, so that the powder granule of the inside cavity is shaped by the effect of power, and the cavity allows or do not allowed into and/or out of material in reforming process.In the step b, allow in reforming process discharging, by orthopedic part powder granule through tapping channel filtering discharge cavity outside, and by feeding-passage feed and/or cavity metamorphosis come pressure enough in holding chamber body；Or, allow to feed in reforming process and discharge, and part shaping Good powder granule is discharged by tapping channel and carries out predetermined processing outside cavity, and sending into cavity by feeding-passage after having handled carries out circular reshaping.In the present invention, the effect of the power can be between powder granule be processed between powder granule or processed and shaping auxiliary material or the impact between processed powder granule and the cavity, extruding, rub or shear action（Cover the effect of the power of various usual concepts such as " collision ", " rolling is ground ", " rubbing " above）, the change of the cavity form turns to local or overall, and the change procedure is gradual change or mutation the process that with or without is vibrated.According to apparatus of the present invention and method, pass through the deformation of cavity, typically, the combinative movement of the component by controlling to constitute cavity, cavity space and powder granule relative position therein is set to change, the effect such as make the powder granule in cavity be squeezed each other.Can be ground due to material to be machined particle, rub by comprehensive impact, extruding, friction, rolling in cavity, shearing etc. and to act on, corner angle, burr so as to remove particle surface etc., the purpose to powder granule crushing, shaping or spheroidization is reached, the regulation and control to powder granule pattern are effectively realized.Traditional high speed impact, " cold working " of cut mode are different from, passes through the shape of the component to constituting cavity, size, the pattern of the external force applied（Such as more slowly extruding, very fast Ground shock waves, and/or vibration）Etc. being controlled by, the present invention can maintain the original character of material to be machined, preferably overcome other powder granule processing mode such as rolloffs simultaneously, ball milling, the shortcoming of vibration method, improve the controllability of processing, such as extruding, impact, friction, the control of the dynamics such as shearing, this is embodied in the control for having an impact factor to processing effect, during powder granule is processed, because " the including " of shaping cavity acts on, even there is partial material to be passed in and out from passage, wide-open situation is also not present for air, strength disposal is maintained always and stablizes effective level.Due to passage when cavity, which has, is available in processing into and/or out of material, the purpose that crushing, shaping more efficiently are processed can be carried out in the morphing process that process is cavity to riddling material particles therein so as to reach into and/or out of material.For example, if allowing material during processing, the new material particles of the influence efficiency produced by shaping can be excluded rapidly in process first, improve processing efficiency, on the other hand, also help to form efficient continuous continuous productive process or cycle operation, the material that machined good or part is processed is sent to outside cavity, other working processes can be implemented, and optionally can be by through chamber The material that part after extracorporeal treatment is processed returns cavity by passage foldback and reprocessed, and forms cycle operation.Although the use of tapping channel makes the pressure in non-cavity have the trend of reduction, it can be made up completely by acting on dynamics in the mode holding chambers such as the action and/or increase charging simultaneously of control assembly with being made to this.The present invention is strong relative to traditional scheme processing controllability, to being processed object strong adaptability（For granularity size, hardness etc.）, component is applied vibration change makes working process optionally lay particular emphasis on partial cut or rub to strengthen impacting, change element shapes, can also save space, improve efficiency, reduction noise pollution and energy consumption.In addition, available equipment and materials selection of the invention is extensive, and it is economical, while set editing objective is reached, it can realize that automation size metaplasia is produced.The present invention can not only be used for more preferably selecting for powder granule shaping or spheroidization, and also effectively powder can be carried out to force crushing or depth to be ground.It is foregoing to have elaborated the feature and technical advantage of the present invention widely, so as to more fully understand the detailed description of the present invention.The further feature and advantage of the present invention will be described below.It should be appreciated by those skilled in the art that the concept and specific embodiment that disclose are used for changing or designing other structures completing the identical purpose of the present invention based on being easily used as.Those skilled in the art are not it should also be appreciated that this equivalent construction offsets the spirit and scope of the present invention.It is considered as the novel features of feature of the present invention, its structure and operation method, and further objects and advantages, will be better understood when from following description and with reference to accompanying drawing.However, it should profoundly recognize there is provided each feature merely to description and illustrate, without be intended to limitation the present invention definition.Brief description of the drawings

It is the structure and pattern schematic diagram of the invention crushed with a kind of embodiment of ideal situation of apparatus for shaping to scheme la to lc is schemed；Fig. 2 a to Fig. 2 c crush the structure and pattern schematic diagram with another embodiment of apparatus for shaping for the present invention；Fig. 3 is the structural representation of another embodiment of present invention crushing with apparatus for shaping； Fig. 4 crushes the structural representation with another embodiment of apparatus for shaping for the present invention.Embodiment

The present invention is described in further detail with reference to accompanying drawing by the following examples.As schemed shown in la- figures lc, this example show the general principle of the present invention.As schemed shown in la, a perfect elasticity cavity is used with apparatus for shaping if crushing, powder granule is wrapped in the flexible cavity.Original state, powder granule is only squeezed by because wrapping up power.To applying equal pressure above and below the cavity, the flexible cavity will produce transverse horizontal deformation（Even expand）, as the spherical elliposoidal become as shown in figure lb.As schemed shown in lc, when external force is removed, the flexible cavity returns to original form.The external force for causing flexible cavity to deform of diagram is pressure, but this external force is not limited to pressure, for example, can also be to bring it about deformation to flexible cavity pressure pulling force.In this cyclic process, the powder granule of different parts is by by multi-faceted extruding in cavity；At the same time, due to Wall deformation（Or volume is also changed）, extruding, friction, shearing will be produced between the adjacent powder granule being located therein because of relative movement, although extruding and friction degree are because in cavity diverse location（Such as scheme l_a, 3 points of A, B, C in lb, lc）Difference and have difference.The treatment effect of powder granule depends on outer layer elastic packaging power and by amplitude of deformation, speed etc. caused by external force, and these can be controlled by.Simultaneously, at least one passage is offered on flexible cavity for entry/exit material while processing, so that can entry/exit material in processing, the new material particles for the influence efficiency that this aspect is produced when can exclude processing rapidly in process, optimize shaping effect, improve processing efficiency, on the other hand efficient continuous continuous productive process or cycle operation can be formed, the material that machined good or part is processed is sent to outside cavity, other working processes can be implemented, and the material after chamber extracorporeal treatment can be optionally processed further by passage foldback time cavity again.Based on the disclosure above, if meeting following condition, the present invention can be implemented with the embodiment different from above-mentioned flexible cavity：

1) deformation of flexible cavity can be simulated； 2) can adjust the power of effect in cavity；

3) relative to material to be machined（Powder granule or the mixture with other media）, assembly material has reliability, durability；

4) be provided with enter when being available in processing or/discharging passage.One typical device crushed with shaping, can include constituting cavity it is some can self contained function component, control the combinative movement of some components, the space of material to be machined in cavity will be changed, and make full of the powder granule in cavity（Or the mixture with assist medium）Bear the effect of multi-faceted power.For example, the action for the component that control is contacted with powder granule and state, the effect such as powder granule can be made in cavity to be squeezed, roll stone roller, rub, shear, rubbing, vibrating, so as to remove particle surface corner angle, burr, reach the purpose to powder granule crushing, shaping or spheroidization, in the process, material to be processed also plays the effect of the medium of transmission power simultaneously.The cavity has the passage of input and output material when being available in processing, and material can be passed in and out in the morphing process that process is cavity, and the purpose that crushing, shaping more efficiently are processed is carried out to riddling material particles therein to reach.Although the use of tapping channel makes the pressure in non-cavity have the trend of reduction, charging can be passed through（The passage of charging is additionally provided with this situation）And/or the action of component makes smaller volume be made up to be made to this.Therefore, in process, material can have turnover, even allow in cavity that material is unclosed and overflows, pressure leaks, as long as the part volume of cavity receiving material to be machined is controlledly reduced and the trend with diminution, or because material changes as separated out new material or volumetric expansion itself in itself, or more situation occur simultaneously, just can maintain the pressure in cavity needed for working process, reach the purpose of effective machining and shaping.In different embodiments, the quantity of the component contacted with powder granule can be changed and their state is controlled, such as by controlling the power on these components and the moving direction of these components, translational speed, or component rotated, deformed in itself and/or vibrate, relative position changes between making the size, shape and powder granule that powder granule is taken up space in cavity, so as to occur lasting intergranular relative movement and interaction.Power on these components is controllable default external force, and this external force enables powder granule institute stress to adjust, so as to control processing dynamics, includes mode, amplitude, acting frequency, the size of power and the duration etc. of effect.In certain embodiments, cavity can have multiple choices from a kind of state change to the mode of another state, both can be the change of globality, can also be the change in part, can both use progressive side Formula, it would however also be possible to employ mutational formats, both can be the mode for the mode or non-vibration for causing powder granule to vibrate.In certain embodiments, in addition to can be by selecting to constitute the modular construction and pattern of cavity, part etc. can also be separated by filtration by controlling tapping channel size, increasing cavity in discharge outlet, change discharging damping, the dynamics control of working process is realized in terms of these.In certain embodiments, additional agitating device is preferably, it can improve the uniformity to powder granule working process in cavity in cavity.

In a kind of typical embodiment, cavity, which has from outside, extends to its internal piston cylinder operator, and the piston cylinder operator includes at least one independent piston.As shown in Fig. 2 a to Fig. 2 c, in a more specific embodiment, cavity is assemblied in first to second piston component 101-103 on the cylinder body 100 including cylinder body 100, in piston mode, the motion positions of first piston component 101 are in a first direction, the piston movement positioning of the second piston component 102 is in a second direction, the first direction and the second direction are substantially parallel, and the cavity is additionally provided with discharging opening and discharge door with matching.Preferably, the discharge door is the 3rd piston component 103, it is highly preferred that the 3rd piston component 103 has the front end gradually come to a point towards the discharging opening direction, in order to which the open or corresponding discharging opening of fractional open can be selected, or implement closing to it.It is highly preferred that the cavity also includes the agitator 104 installed in the cavity.Each component contact surface is smooth, and rigidity is kept during whole fabrication cycles, and first to second piston component 101-102 and the agitator 104 for playing piston effect are to maintain sealedly to cavity.Description carries out effective Shape correction using the device of above-described embodiment to powder particle below：

1st, as shown in Figure 2 a, under original state, material particles are riddled in cavity, certain pressure more than atmospheric pressure is maintained in cavity, as far as possible without air preferably in cavity.

2nd, as shown in Figure 2 b, when the component of first piston component 101 is by sufficiently large external pressure P1, and when acting on the external pressure P2 that the upward power on second piston component 102 is more than on second piston component 102 by the transmission of material to be machined particle, second piston component 102 is displaced outwardly by jack-up, until state as shown in Figure 2 c. In this process, material particles are while pressure is subject in cylinder body, and because of the relative movement of component, the space for accommodating material particles produces change, therefore material particles are forced to move to adapt to this change, and it is this it is mobile can because of material particles in cavity diverse location（A, B location in such as figure）Difference and it is different.Due to continuously being contacted between material particles in cavity, thus there is moving direction, the difference of translational speed, therefore particle not only receives extruding but also receives the useful effects such as friction, shearing.

3rd, as shown in Figure 2 c, when component is moved to a certain extent, change pressure Pl, P2 on two-piston component, the upward power on first piston component 101 is acted on more than the external force P1 on first piston component 101 so that being transmitted by material particles, then first piston component 101 is by outside jack-up.Until returning to original position as shown in Figure 2 a, a process cycle is completed.In the process, the powder particle in cavity is similarly subjected to the effect including extruding force, shearing force, frictional force.Preferably, to make this cavity endoparticle be handled by uniformity, material particles can be stirred using agitator 104 simultaneously in above-mentioned processing procedure.As needed, the processing cycle to above-mentioned 2,3 is performed, and is continued repeatedly, the particle shaping requirement certain until reaching.By the reciprocating motion for controlling the first and second piston components 101,102, equivalent to making cavity that there is variable " elasticity ", during useful effect, accommodate the cavity space generation actual change that these components of material to be machined are constituted, powder particle is forced to flow in cavity, so that material to be machined is by the shaping operation under controllable pressure.It is to be appreciated that although the final object of processing and processing is powder particle monomer, processing is really acted directly on the monomer powders particle that these contact with each other or the colony constituted with other media or partial mass." useful effect " or " effectively processing " refers to be processed powder particle and is caused to be squeezed by the effect of other power beyond gravity, rub, shear, roll to grind etc. and reach acting on for shaping effect.In the above process, it can optionally make to process or part is processed or unwanted material is discharged in time by controlling the 3rd piston component 103 to insert discharging opening or stretching regulation discharging opening size from discharging opening.The cavity can also open up charging aperture, and it can be used for feeding in process.Especially, when discharging in process, it can so cooperate with the first and second piston components 101,102 to maintain cavity internal pressure simultaneously from throat-fed, keep processing dynamics.On the other hand, due to allowing input and output material in process, efficient continuous continuous productive process can be formed.In some other embodiments, also Charging aperture and discharging opening can be connected to form the closed circulation of one together with forming the cyclic part outside cavity, and the cyclic part outside cavity can add other processing procedures, enhance the practicality of the present apparatus.As shown in figure 3, in another embodiment, the difference with the embodiment shown in Fig. 2 is the purpose that processing material particles are only reached with a piston component.It is also feasible to crushing and for apparatus for shaping, controlling a piston component to carry out piston movement in cavity.Preferably, can drive this piston component carry out piston movement external force on the basis of superpositing vibration composition, meanwhile, using in cavity stirring or extracorporal circulatory system stirring reach to the uniform shaping of material particles.As shown in figure 4, in another embodiment, the cavity is further opened with charging aperture, the charging aperture can be equipped with unidirectional wealthy, for example, set piston 105, the piston configured in shape similar to Fig. 3 in discharge outlet in inside cavity.The charging aperture is available for feeding in process.Similarly, in the embodiment and other embodiment shown in Fig. 1 and Fig. 2, superpositing vibration it can also be acted on the basis of the active forces such as impact, the extruding of component passes.In further embodiments, crush and be also provided with cooling device with apparatus for shaping, so that frictional heat dissipates, processed powder properties will not be changed.In some other embodiments, crush and be also provided with attemperator with apparatus for shaping, to be worked under keeping warm mode, this is applied to the powder that need to be processed at a certain temperature.The design for embodying the principle of the invention is not limited to above-mentioned specific embodiment, component count can such as be increased and change size, shape and the operational motion of each component, the probability relatively moved to increase between intracavitary powder granule such as deform in itself including vibration, rotation, component and purposefully select the Training system to particle, adjuvant can be also added in material is shaped, so as to improve operating efficiency and effect, strengthen its applicability, give full play to the advantage of the present invention.For example, foregoing piston component is not possess elasticity in itself, can also be using the component of configuration elastic member so that component possesses elasticity in itself.By the elastic force of elastic component, dilatory power can also be applied to component from outside and non-pressure, can equally play makes cavity change between variform. According to the present invention, a kind of powder particle shaping methods are also provided, comprised the following steps：A. powder particle to be processed is filled into cavity, the cavity have be used in reforming process for material into and/or out of passage；

B. applying external force to the cavity makes it change repeatedly between variform, so that the powder granule of the inside cavity is shaped by the effect of power, and the cavity allows or do not allowed into and/or out of material in reforming process.Preferably, in the step b, allow in reforming process discharging, by orthopedic part powder granule through tapping channel filtering discharge cavity outside, and by feeding-passage feed and/or cavity metamorphosis come pressure enough in holding chamber body；Or, allow to feed in reforming process and discharge, and the orthopedic powder granule in part is discharged by tapping channel and carries out predetermined processing outside cavity, sending into cavity by feeding-passage after having handled carries out circular reshaping.Referring to Fig. 2 a- Fig. 2 c, in a preferred embodiment, the cavity used, which has from outside, extends to its internal piston cylinder operator, and the piston cylinder operator includes the piston component of at least two independent actions, and the step b includes：In the case of the inside cavity pressure is maintained, the piston independent to described at least two applies different pressure respectively, so that a part of piston is pressed into the inside cavity and another part piston is by outside jack-up, then it is on the contrary, continue repeatedly circulation, until reaching the shaping requirement of powder particle.It will be appreciated by those skilled in the art that more specifically, the enforceable other more excellent details of the inventive method have been embodied in during the design and use of the foregoing various embodiments of apparatus of the present invention.The apparatus and method of the present invention are applied to the shaping and crushing of a variety of powders, can be used for that scattered agglomerate crush and further Shape correction.For the larger powder granule of relative resilient, for elastic smaller, the larger powder granule of rigidity has more preferable treatment effect to the present invention.10056 although the present invention and its advantages have been described in detail, it should be appreciated that do not offseting in the spirit and scope of the present invention, can make a variety of changes, replace and change.In addition, the scope that the present invention is applied is not limited to process, machine, manufacture, material composition, mode, the method and steps described in specification Specific embodiment.From the disclosure of the present invention, those skilled in the art will be easily using substantially performing and corresponding embodiment identical function described herein or realize the existing of identical result or later by the process of exploitation, machine, manufacture, material composition, mode, method or step.Therefore, appended claims are intended to include these processes, machine, manufacture, material composition, mode, method or step.

Claims

Claims

1. one kind is crushed and apparatus for shaping, it is characterized in that, including the cavity that can be changed by external force between variform, the cavity makes the effect of the powder granule stress inside it and is shaped in the change procedure of form, the cavity have be used in reforming process for material into and/or out of passage.

2. crushing and apparatus for shaping according to claim 1, it is characterized in that, the acting as of the power is processed between powder granule or between the processed powder granule and shaping auxiliary material or impact between processed powder granule and the cavity, extruding, rubbed or shear action, the change of the cavity form turns to local or overall, gradual change or mutation the process that the change procedure vibrates for or without.

3. crushing and apparatus for shaping according to claim 1, it is characterised in that the cavity has at least one charging aperture and at least one discharging opening.

4. crushing and apparatus for shaping according to any one of claims 1 to 3, it is characterised in that the cavity, which has from outside, extends to its internal piston cylinder operator, and the piston cylinder operator includes the piston of at least one independent action.

5. crushing according to claim 3 and apparatus for shaping, it is characterized in that, the cavity includes cylinder body and the first piston component being assemblied in piston mode on the cylinder body, the confession material into and/or out of passage include a discharging opening and the 3rd piston component being engaged with the discharging opening, 3rd piston component has the front end gradually come to a point towards the discharging opening direction, for implementing open, fractional open or closing to the discharging opening.

6. crushing according to claim 3 and apparatus for shaping, it is characterized in that, the cavity includes cylinder body and at least first piston component and second piston component that are assemblied in piston mode on the cylinder body, the piston movement positioning of the first piston component is in a first direction, the piston movement of the second piston component is also positioned in second direction, the confession material into and/or out of passage include a discharging opening and the 3rd piston component being engaged with the discharging opening, 3rd piston component has the front end gradually come to a point towards the discharging opening direction, for implementing to open to the discharging opening, fractional open or closing, preferably, the first direction and the second direction are substantially parallel or generallyperpendicular.

7. crushing and apparatus for shaping according to claim any one of 1-6, it is characterised in that also include the agitator being arranged in the cavity.

8. one kind is crushed and shaping methods, it is characterised in that comprised the following steps：

A. powder particle to be processed is filled into cavity, the cavity have be used in reforming process for material into and/or out of passage；

B. applying external force to the cavity makes it change repeatedly between variform, so that the powder granule of the inside cavity is shaped by the effect of power, and the cavity allows or do not allowed into and/or out of material in reforming process.

9. crushing and shaping methods according to claim 8, it is characterized in that, the acting as of the power is processed between powder granule or between the processed powder granule and shaping auxiliary material or impact between processed powder granule and the cavity, extruding, rubbed or shear action, the change of the cavity form turns to local or overall, gradual change or mutation the process that the change procedure vibrates for or without.

10. crushing according to claim 8 or claim 9 and shaping methods, it is characterized in that, in the step b, allow discharging in reforming process, by orthopedic part powder granule through tapping channel filtering discharge cavity outside, and by feeding-passage feed and/or cavity metamorphosis come pressure enough in holding chamber body；Or, allow to feed in reforming process and discharge, and the orthopedic powder granule in part is discharged by tapping channel and carries out predetermined processing outside cavity, sending into cavity by feeding-passage after having handled carries out circular reshaping.