CN218182036U

CN218182036U - Material car is shelled to neodymium iron boron magnetism concatenation formula intelligence

Info

Publication number: CN218182036U
Application number: CN202222509114.1U
Authority: CN
Inventors: 吴世宾
Original assignee: Dongguan Zhongwang Permanent Magnet Technology Co ltd
Current assignee: Dongguan Zhongwang Permanent Magnet Technology Co ltd
Priority date: 2022-09-21
Filing date: 2022-09-21
Publication date: 2022-12-30
Anticipated expiration: 2032-09-21

Abstract

The utility model discloses a neodymium iron boron magnetism concatenation formula intelligence stripping vehicle, including the material processing car that strips of concatenation formula, strip the material processing car and include material loading chamber, process chamber and unloading chamber, the left and right ends of process chamber are equipped with the extension window that stretches out outward and lean on respectively on the side end face in material loading chamber and unloading chamber, the top of extension window is equipped with can slide from top to bottom and stretch into to the extension window and make the process chamber form the check baffle of sealed cavity; adopt the material loading chamber of concatenation formula, the material stripping vehicle who has the protection effect is assembled into to process chamber and unloading chamber, and the volume that changes the process chamber reduces the packing volume, still fill nitrogen respectively to three cavity through supplying the nitrogen device and protect, and be provided with the baffle that separates that is used for preventing the outside leakage of intracavity inert gas at the both ends of process chamber, and all be equipped with exhaust apparatus on material loading chamber and unloading chamber, can in time outwards discharge the air that will enter into inside, avoid the air to flow into the sintering quality that influences the neodymium iron boron blank in the process chamber, reduce the degree of oxidation.

Description

Material car is shelled to neodymium iron boron magnetism concatenation formula intelligence

Technical Field

The utility model relates to a neodymium iron boron embryo material processing technology field especially discloses a skip is shelled to neodymium iron boron magnetism concatenation formula intelligence.

Background

Before the neodymium iron boron magnetic material is prepared into the magnet, the neodymium iron boron magnetic material is required to be subjected to blank pressing, shaping and sintering, then the neodymium iron boron magnetic material is subjected to magnetizing processing, and finally the neodymium iron boron magnetic material with magnetism is prepared; however, the neodymium iron boron blank is isolated from air before the magnet is manufactured, so that the influence of active gas in the air on the quality of the neodymium iron boron blank is avoided, and then the blank is transferred into sintering equipment for processing, so that the internal stress of the formed blank is eliminated, fine cracks on the blank are repaired, the overall density of the blank is improved, and the blank enters a sintering furnace under the protection of inert gas to be refined to obtain a good blank to be magnetized.

At present, sintering protection equipment on the market needs to fill a large amount of inert gases such as nitrogen or argon into the sintering protection equipment, remove an outer packaging bag of a blank under the protection of the inert gases, and then send the blank into a heating device for heat treatment; however, the volume of the internal space of the equipment is large, a large amount of inert gas is needed to be filled, a large amount of financial resources are needed to maintain stability, in the feeding and discharging processes, the equipment needs to be opened to feed or discharge, the internal inert gas is easy to leak outwards, and the external air rushes inwards, so that the internal environment is protected, and therefore, the problem that the waste of the internal inert gas is reduced and the external air cannot enter and influence the internal environment in the feeding and discharging processes of the equipment needs to be solved.

SUMMERY OF THE UTILITY MODEL

In order to overcome the shortcoming and the insufficiency that exist among the prior art, the utility model aims to provide a skip is shelled to neodymium iron boron magnetism concatenation formula intelligence.

In order to solve the technical problem, the utility model discloses the technical scheme who takes is: the utility model provides a skip is shelled to neodymium iron boron magnetism concatenation formula intelligence, includes the material processing vehicle that shells of concatenation formula, shell the material processing vehicle and include material loading chamber, process chamber and unloading chamber, both ends are equipped with the extension window that outwards stretches out about the process chamber and support respectively to lean on the side end face in material loading chamber and unloading chamber, and the top of extending the window is equipped with can slide from top to bottom and stretches into to extend the window in make the process chamber form seal chamber's check baffle, shells and still is equipped with on the material processing vehicle and supplies the nitrogen device and pour into nitrogen gas in the cavity in material loading chamber, process chamber and unloading chamber respectively and protect the neodymium iron boron embryo material.

As an optimization, the material loading chamber is including the last feed bin that has the observation window and set up the material loading conveyer belt that is used for carrying the neodymium iron boron embryo material in last feed bin, it is used for supplying user's hand to stretch into the inside material loading handle hole that carries out the material loading operation to the neodymium iron boron embryo material to be equipped with several interval distribution on the lateral wall of going up the feed bin, still be equipped with on the material loading handle hole and be used for stretching into in the feed bin and have the sealed operation gloves of guard action, both sides end all is equipped with the material loading mouth about going up the feed bin, the material loading mouth that is located feed bin one side offsets the cavity that forms the intercommunication with the extension window in processing chamber, the material loading mouth of another side is equipped with outward and is used for covering closes the material loading door plant that prevents leaking on the material loading mouth, still be equipped with the first sealing washer that has good leakproofness ability on the material loading door plant, material loading door plant closes and makes the feed bin form an airtight space and through the neodymium iron boron embryo material loading conveyer belt that supplies nitrogen device to inwards pour into nitrogen protection to process the chamber transport.

As a preferred, the processing chamber is including the processing storehouse that has the observation window and set up the processing conveyer belt of transmission neodymium iron boron embryo material in the processing storehouse, be equipped with several interval distribution on the lateral wall in processing storehouse and be used for supplying user's hand to stretch into the inside processing operation hole that carries out the processing operation to the neodymium iron boron embryo material, still be equipped with on the processing operation hole and be used for stretching into and have the sealed operation gloves of guard action in to the processing storehouse, the concave mounting groove that is used for supplying the installation of processing conveyer belt that is equipped with in bottom in processing storehouse, the up end that is located the processing conveyer belt of mounting groove and the inner bottom surface looks parallel and level in processing storehouse.

As a preferred, the upper end still is equipped with the supporter that is used for temporarily putting the neodymium iron boron stock that the processing was handled in the processing storehouse, and the supporter sets up convenient to use person along the processing storehouse extending direction and puts the neodymium iron boron stock that has handled through the processing handle hole and temporarily store on the supporter.

Preferably, the blanking cavity comprises a blanking bin with an observation window and a blanking conveying belt arranged in the blanking bin and used for conveying processed neodymium iron boron blanks, a plurality of blanking operation holes which are distributed at intervals and used for enabling a user to stretch into the interior of the blanking operation holes for blanking and packaging the processed neodymium iron boron blanks are formed in the side wall of the blanking bin, sealing operation gloves used for stretching into the blanking bin and having a protection effect are further arranged on the blanking operation holes, blanking ports used for discharging and collecting the neodymium iron boron blanks are arranged at the left side end and the right side end of the blanking bin, the blanking port at one side end of the blanking bin abuts against the extension window of the processing cavity to be connected to form a communicated cavity, a blanking door panel used for covering the blanking port to prevent leakage is further arranged at the other side end of the blanking bin, a second sealing ring with good sealing performance is further arranged on the blanking door panel, when the blanking door panel is closed and covered, the processed neodymium iron boron blanks in the processing cavity are conveyed to the blanking bin through the blanking conveying belt and are uniformly processed through the blanking operation holes, and the blanking door panels are opened after the door panels are packaged and stored for subsequent processing.

Preferably, the left and right side end faces of the extending window are provided with third sealing rings for preventing gas leakage, and the third sealing rings respectively abut against the side end faces of the feeding cavity and the discharging cavity to form a stripping processing vehicle with good sealing performance.

As a preferred, shell and expect that processing vehicle below still is equipped with the mounting bracket that is used for supplying its installation fixed, and the lower extreme of mounting bracket is equipped with the universal wheel that can remove wantonly.

Preferably, a storage box for storing articles is arranged below the processing cavity, and a lifting platform for jacking the articles in the storage box to move upwards is further arranged in the storage box.

Preferably, the feeding cavity and the discharging cavity are both provided with an exhaust device, and the exhaust device is arranged at the side end of the feeding cavity or the discharging cavity and used for exhausting air entering due to the opening of the cavity outwards.

Preferably, a driving device for driving the lattice baffles to reciprocate is further arranged above the lattice baffles.

The utility model has the advantages that: adopt the material loading chamber of concatenation formula, the material stripping vehicle who has the protection effect is assembled into to process chamber and unloading chamber, and the volume that changes the process chamber reduces the packing volume, still fill nitrogen to three cavity respectively through supplying the nitrogen device and protect, and be provided with the baffle that separates that is used for preventing the outside leakage of intracavity inert gas at the both ends of process chamber, and all be equipped with exhaust apparatus on material loading chamber and unloading chamber, can in time outwards discharge the air that enters into inside, avoid the air to flow into the sintering quality that influences the neodymium iron boron blank in the process chamber, reduce the oxidation degree, still be equipped with in the side and supply the user hand to stretch into the sealed handle hole of peeling off the outside sealed bag of blank in the cavity, then unified send the neodymium iron boron blank to sintering equipment again and carry out thermal treatment, can effectively reduce the waste of gas resource, reduce the condition that the neodymium iron boron blank takes place to oxidize, avoid the magnet requirement that produces to be not conform to requirement.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a front schematic view of the present invention.

Fig. 3 is a schematic structural view of the feeding cavity of the present invention.

Fig. 4 is a schematic structural view of the processing chamber of the present invention.

Fig. 5 is a schematic structural view of the blanking chamber of the present invention.

The attached drawings indicate the following:

100. stripping a material processing vehicle; 110. a feeding cavity; 111. feeding a bin; 112. a feeding port; 113. a feeding conveyer belt; 114. a feeding operation hole; 115. a feeding door plate; 120. a processing cavity; 121. an extension window; 122. a grid baffle; 123. a processing bin; 124. processing a conveying belt; 125. processing an operation hole; 126. mounting grooves; 127. a storage tank; 128. a lifting platform; 130. a blanking cavity; 131. discharging a bin; 132. blanking a conveying belt; 133. a blanking operation hole; 134. a feeding port; 135. a blanking door plate; 140. a nitrogen supply device; 150. an observation window; 160. a mounting frame; 161. a universal wheel; 170. and an exhaust device.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and accompanying drawings, which are not intended to limit the present invention.

As shown in fig. 1-2, a neodymium iron boron magnetism splicing type intelligent stripping vehicle comprises a splicing type stripping processing vehicle 100, wherein the stripping processing vehicle 100 comprises a feeding cavity 110, a processing cavity 120 and a discharging cavity 130, extending windows 121 extending outwards are arranged at the left end and the right end of the processing cavity 120 and respectively abut against the side end faces of the feeding cavity 110 and the discharging cavity 130 to enable the feeding cavity and the discharging cavity 130 to form a communicated cavity, a grid baffle 122 capable of sliding up and down and extending into the extending windows 121 to enable the processing cavity 120 to form a sealed cavity is arranged above the extending windows 121, a driving device for driving the grid baffle 122 to reciprocate is further arranged above the grid baffle 122, the grid baffle 122 can be controlled to automatically move downwards/upwards through the driving device, so that inert gas in the processing cavity 120 is reduced, waste is reduced, a nitrogen supply device 140 is further arranged on the stripping processing vehicle 100, the nitrogen supply device is respectively arranged in a cavity of the feeding cavity 110, the processing cavity 120 and the nitrogen cavity 130 to protect inert gas injected into the cavity of the neodymium iron boron magnetism splicing type intelligent stripping processing vehicle from a stable state, and to avoid the phenomenon that the neodymium iron boron magnetism contacts with the reactive gas, so that the reactive magnet, and the magnet is not in the production process.

Referring to FIG. 3: in this embodiment, the feeding cavity 110 includes a feeding bin 111 having an observation window 150 and a feeding conveyor belt 113 disposed in the feeding bin 111 for conveying the ndfeb blanks, a plurality of feeding operation holes 114 are disposed on a side wall of the feeding bin 111 and used for allowing hands of a user to extend into the feeding bin to perform feeding operation on the ndfeb blanks, and sealing operation gloves used for extending into the feeding bin 111 and having a protection effect are further disposed on the feeding operation holes 114, a feeding port 112 is disposed on each of left and right sides of the feeding bin 111, wherein the feeding port 112 located on one side of the feeding bin 111 abuts against the extension window 121 of the processing cavity 120 to form a communicating cavity, a feeding door plate 115 used for covering the feeding port 112 on the other side is disposed at an outer end of the feeding port 112, and a first sealing ring having good sealing performance is disposed on the feeding door plate 115, when in use, the feeding door plate 115 is closed and covered to form a sealed space, and nitrogen is injected inwards through the nitrogen supply device 140 to protect the feeding of the ndfeb blanks conveyed through the feeding conveyor belt 113 in the processing cavity 120.

Referring to FIG. 4: in this embodiment, the processing chamber 120 includes a processing chamber 123 having an observation window 150 and a processing conveyor belt 124 disposed in the processing chamber 123 for conveying the ndfeb blanks, a plurality of processing operation holes 125 are disposed on a side wall of the processing chamber 123 at intervals for allowing a hand of a user to extend into the processing chamber to perform processing operation on the ndfeb blanks, a sealing operation glove having a protection effect is further disposed on the processing operation hole 125 for extending into the processing chamber 123, a mounting groove 126 for mounting the processing conveyor belt 124 is concavely disposed at a bottom of the processing chamber 123, an upper end surface of the processing conveyor belt 124 disposed in the mounting groove 126 is flush with an inner end bottom surface of the processing chamber 123, a storage rack for temporarily storing the processed ndfeb blanks is further disposed at an upper end in the processing chamber 123, the storage rack is disposed along an extending direction of the processing chamber 123 so that the user can place the processed ndfeb blanks on the storage rack for temporarily storing temporarily through the processing operation hole 125, and convey the processed ndfeb blanks into the blanking chamber 130 after uniform processing.

Referring to FIG. 5: in this embodiment, the discharging cavity 130 includes a discharging bin 131 having an observation window 150 and a discharging conveyer belt 132 disposed in the discharging bin 131 for conveying the processed ndfeb blanks, a plurality of discharging operation holes 133 are disposed on a side wall of the discharging bin 131 at intervals for allowing a user to insert a hand into the interior to perform discharging and packaging on the processed ndfeb blanks, and sealing operation gloves for inserting into the discharging bin 131 and having a protection function are further disposed on the discharging operation holes 133, and a discharging opening 134 for discharging and collecting the ndfeb blanks is disposed at left and right sides of the discharging bin 131, the discharging opening 134 at one side of the discharging bin 131 abuts against the extension window 121 of the processing cavity 120 to form a communicating chamber, a discharging door 135 for covering the discharging opening 134 at the other side is further disposed on the discharging opening 134, and a second sealing ring having a good sealing performance is disposed on the discharging door 135, when in use, the discharging door 135 is closed and covered to convey the processed ndfeb blanks in the processing cavity 120 to the conveying belt 132, and then the discharging door 135 is arranged and packaged to be used for discharging after the processed ndfeb blanks are processed and packaged.

In this embodiment, third sealing rings for preventing gas leakage are provided on both the left and right side end surfaces of the extending window 121, and the third sealing rings are respectively abutted against the side end surfaces of the feeding cavity 110 and the discharging cavity 130, so that the stripping processing vehicle 100 with good sealing performance is formed.

In the embodiment, a mounting rack 160 is arranged below the stripping processing vehicle 100 for mounting and fixing the stripping processing vehicle, and a universal wheel 161 capable of moving freely is arranged at the lower end of the mounting rack 160.

In this embodiment, a storage box 127 for storing articles is further provided below the processing chamber 120, and a lifting platform 128 for lifting the articles inside is provided in the storage box 127, and the articles to be used are taken out and used by placing them on the lifting platform 128 and then lifting them into the processing chamber 120.

In this embodiment, still through all being equipped with exhaust apparatus 170 on material loading chamber 110 and unloading chamber 130, set up exhaust apparatus 170 at the side of material loading chamber 110 or unloading chamber 130, outwards discharge the air that gets into because of opening material loading door plant 115/unloading door plant 135 through the mode of manual open control valve, avoid the air to cause the influence to the neodymium iron boron stock, lead to the product that the processing was come out not to conform to the quality requirement.

In this embodiment, an oxygen content detecting device (not shown) is further disposed on the loading chamber 110, the oxygen content detecting device includes a display screen and a detecting device disposed in the loading chamber 110, the oxygen content inside the loading chamber is monitored by the detecting device, and when the oxygen content in the loading chamber 110 is greater than a preset value, the oxygen content can be observed through the display screen and inform the user to open the exhaust device 170.

In the use, at first, go up material cavity 110, process chamber 120 and unloading chamber 130 and connect the three fixedly through the hasp to the junction between them is equipped with the third sealing washer that has played good sealed effect, can effectively prevent inside inert gas's leakage.

When stripping off the inside inert gas such as nitrogen gas that has been full of skip, separate through putting down check baffle 122 for material loading chamber 110 and processing chamber 120 divide into two regions, then put into material loading chamber 110 with the neodymium iron boron stock, then close material loading door plant 115, open exhaust apparatus 170 and discharge the inside air that enters, after the air discharge finishes, fill nitrogen gas, make it form a good nitrogen protection environment, then the user stretches into the material loading chamber 110 with the hand through material loading handle hole 114, peel off the outside protection bag of neodymium iron boron stock suit, place the neodymium iron boron stock and carry to processing chamber 120 on material loading conveyer belt 113 again.

The neodymium iron boron blank that comes is carried through material loading conveyer belt 113 transports carries out the transmission again on processing conveyer belt 124, all is provided with processing operation hole 125 in the both sides end of processing chamber 120 and supplies a plurality of users to carry out the processing operation simultaneously, takes out through quick neodymium iron boron blank that comes the transmission and places corresponding processing model in, then conveys them to unloading chamber 130 again.

A user in the blanking cavity 130 packs the neodymium iron boron blanks conveyed by the blanking conveyor belt 132 through the blanking operation holes 133 at the side ends, after finishing the arrangement, the grid baffle 122 positioned between the blanking cavity 130 and the processing cavity 120 needs to be put down to separate the neodymium iron boron blanks from the processing cavity, and after the separation, the neodymium iron boron blanks are taken out and placed by opening the blanking door panel 135 for subsequent processing;

when the discharging door 135 is closed, the air discharging device 170 on the discharging chamber 130 is opened to discharge the air flowing into the discharging chamber 130, and the nitrogen supplying device 140 fills the discharging chamber 130 with nitrogen again for subsequent recycling.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any slight modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention are all within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a skip is shelled to neodymium iron boron magnetism concatenation formula intelligence which characterized in that: strip material processing vehicle (100) including concatenation formula, strip material processing vehicle (100) including material loading chamber (110), process chamber (120) and unloading chamber (130), both ends are equipped with outside extension window (121) that stretch out and lean on respectively on the side end face in material loading chamber (110) and unloading chamber (130) about process chamber (120), the top of extending window (121) is equipped with can slide from top to bottom and stretches into to make process chamber (120) form sealed cavity's check baffle (122) in extending window (121), strip and still be equipped with on material processing vehicle (100) and supply nitrogen device (140) and go into nitrogen gas in the cavity of material loading chamber (110), process chamber (120) and unloading chamber (130) respectively and protect the neodymium iron boron stock.

2. The neodymium iron boron magnetism concatenation formula intelligence of claim 1 is shelled skip characterized in that: the feeding cavity (110) comprises a feeding bin (111) with an observation window (150) and a feeding conveyor belt (113) arranged in the feeding bin (111) and used for conveying neodymium iron boron blanks, a plurality of feeding operation holes (114) are formed in the side wall of the feeding bin (111) and used for enabling hands of a user to stretch into the interior of the feeding bin to perform feeding operation on the neodymium iron boron blanks, sealing operation gloves used for stretching into the feeding bin (111) and having a protection effect are further arranged on the feeding operation holes (114), feeding ports (112) are arranged on the left side and the right side of the feeding bin (111), a feeding port (112) located on one side end of the feeding bin (111) abuts against an extension window (121) of a processing cavity (120) to form a communicated cavity, a feeding port (112) on the other side is externally provided with a feeding door plate (115) used for covering the feeding port (112) to prevent leakage, a first sealing ring with good sealing performance is further arranged on the feeding door plate (115), and after the feeding door plate (115) is closed, the feeding port (111) covers the feeding bin to form a sealed space and the feeding conveyor belt (113) which feeds nitrogen into the processing cavity (140).

3. The neodymium iron boron magnetism concatenation formula intelligence stripper car of claim 1, characterized in that: processing chamber (120) are including processing storehouse (123) that have observation window (150) and processing conveyer belt (124) of setting transmission neodymium iron boron blank in processing storehouse (123), be equipped with several interval distribution on the lateral wall of processing storehouse (123) and be used for supplying user's hand to stretch into inside processing operation hole (125) that carry out the processing operation to neodymium iron boron blank, still be equipped with on processing operation hole (125) and be used for stretching into and have the sealed operation gloves of guard action in to processing storehouse (123), the concave mounting groove (126) that are used for supplying to process including conveyer belt (124) installation in bottom of processing storehouse (123), the up end that is located processing conveyer belt (124) in mounting groove (126) is parallel and level mutually with the inner bottom surface of processing storehouse (123).

4. The neodymium iron boron magnetism concatenation formula intelligence stripper car of claim 3, characterized in that: the upper end still is equipped with the supporter that is used for temporarily putting the neodymium iron boron stock that processing was good in processing storehouse (123), and the supporter sets up convenient to use person along processing storehouse (123) extending direction and puts the neodymium iron boron stock that has handled through processing handle hole (125) and temporarily stores on the supporter.

5. The neodymium iron boron magnetism concatenation formula intelligence of claim 1 is shelled skip characterized in that: the blanking chamber (130) comprises a blanking bin (131) with an observation window (150) and a blanking conveyor belt (132) arranged in the blanking bin (131) and used for conveying processed neodymium iron boron blanks, a plurality of blanking operation holes (133) are formed in the side wall of the blanking bin (131) and used for enabling hands of users to stretch into the interior of the blanking bin (131) and packaging the processed neodymium iron boron blanks in a blanking mode, sealing operation gloves used for stretching into the blanking bin (131) and having a protection effect are further arranged on the blanking operation holes (133), blanking openings (134) used for discharging and collecting the neodymium iron boron blanks are arranged at the left side end and the right side end of the blanking bin (131), a cavity communicated with the extension window (121) of the processing chamber (120) in a propping mode is formed, a blanking opening (134) of the other side end is further provided with a blanking door plate (135) used for covering the blanking opening of the blanking door plate (134) to prevent leakage, a second sealing ring with a good sealing performance is further arranged on the blanking chamber (135), when the door plate (135) is closed, the door plate (120), the door plate (135) is used for processing door plate (131), and the door plate (135) to store the processed neodymium iron boron blanks after the blanking conveyor belt (131) is processed, and the blanking conveyor belt (131) is used for processing the blanking conveyor belt (131) and the blanking conveyor belt (132).

6. The neodymium iron boron magnetism concatenation formula intelligence of claim 1 is shelled skip characterized in that: and third sealing rings for preventing gas leakage are arranged on the left and right side end faces of the extending window (121), and the third sealing rings are respectively abutted against the side end faces of the feeding cavity (110) and the discharging cavity (130) to form a stripping processing vehicle (100) with good sealing property.

7. The neodymium iron boron magnetism concatenation formula intelligence of claim 1 is shelled skip characterized in that: the material stripping processing vehicle (100) is further provided with a mounting rack (160) for mounting and fixing the material stripping processing vehicle, and the lower end of the mounting rack (160) is provided with a universal wheel (161) capable of moving randomly.

8. The neodymium iron boron magnetism concatenation formula intelligence of claim 1 is shelled skip characterized in that: a storage box (127) for storing articles is arranged below the processing cavity (120), and a lifting platform (128) for jacking the articles in the storage box (127) to move upwards is further arranged in the storage box.

9. The neodymium iron boron magnetism concatenation formula intelligence stripper car of claim 1, characterized in that: and the air exhaust devices (170) are arranged on the feeding cavity (110) and the discharging cavity (130), and the air exhaust devices (170) are arranged at the side ends of the feeding cavity (110) or the discharging cavity (130) and used for exhausting air entering due to the opening of the cavities outwards.

10. The neodymium iron boron magnetism concatenation formula intelligence stripper car of claim 1, characterized in that: and a driving device for driving the grid baffle plate (122) to reciprocate is also arranged above the grid baffle plate.