CN108620364B - Mould cleaning device - Google Patents

Mould cleaning device Download PDF

Info

Publication number
CN108620364B
CN108620364B CN201810404767.9A CN201810404767A CN108620364B CN 108620364 B CN108620364 B CN 108620364B CN 201810404767 A CN201810404767 A CN 201810404767A CN 108620364 B CN108620364 B CN 108620364B
Authority
CN
China
Prior art keywords
barrel body
wall
box body
mold
runner
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201810404767.9A
Other languages
Chinese (zh)
Other versions
CN108620364A (en
Inventor
宋君能
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NINGBO GAOSHENG MOULD MANUFACTURE CO Ltd
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201810404767.9A priority Critical patent/CN108620364B/en
Publication of CN108620364A publication Critical patent/CN108620364A/en
Application granted granted Critical
Publication of CN108620364B publication Critical patent/CN108620364B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00Cleaning by methods involving the use of tools
    • B08B1/30Cleaning by methods involving the use of tools by movement of cleaning members over a surface
    • B08B1/32Cleaning by methods involving the use of tools by movement of cleaning members over a surface using rotary cleaning members
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00Cleaning by methods involving the use of tools
    • B08B1/10Cleaning by methods involving the use of tools characterised by the type of cleaning tool
    • B08B1/14Wipes; Absorbent members, e.g. swabs or sponges
    • B08B1/143Wipes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00Cleaning by methods involving the use of tools
    • B08B1/50Cleaning by methods involving the use of tools involving cleaning of the cleaning members
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B13/00Accessories or details of general applicability for machines or apparatus for cleaning
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02Cleaning by the force of jets or sprays

Landscapes

  • Moulds For Moulding Plastics Or The Like (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

The application relates to the technical field of die cleaning, and discloses a die cleaning device which comprises a rack, a rotary table and a limiting cylinder, wherein the rotary table is in threaded connection with the inner wall of the limiting cylinder; the lower end of the rotary table is provided with a storage box body, the outer wall of the storage box body is hinged with a support rod, and the lower end of the support rod is provided with a clamping block; a first barrel body positioned on the rack is arranged below the limiting barrel, a third through hole is formed in the side wall of the first barrel body, a second barrel body is rotatably connected in the first barrel body, a clamping groove is formed in the surface of the inner wall of the second barrel body, a fourth through hole is formed in the surface of the inner wall of the second barrel body, a through groove is formed in the bottom of the second barrel body, and a first flexible wiping part is arranged on the surface of the inner wall of the through groove; a recovery box body is arranged below the third opening, and a cleaning assembly is arranged in the recovery box body; the cleaning liquid is thrown to the surface of the mold through rotating the rotary disc, and the mold is cleaned in an all-around mode through the cleaning assembly and the first flexible wiping portion. The invention has the advantages of uniform cleaning of the die and high utilization rate of the cleaning solution.

Description

Mould cleaning device
Technical Field
The invention relates to the technical field of die cleaning, in particular to die cleaning equipment.
Background
The mold is a variety of molds and tools which are used for obtaining required products by injection molding, blow molding, extrusion, die casting or forging, forming, smelting, stamping and other methods in industrial production, and the mold is easy to generate dirt on the surface of the mold, rust on the mold and the like when being used for a long time or being placed for a long time.
In the prior art, most brushes are manually used for cleaning dirt and rusty places on the surface of a mold in a pool with cleaning liquid, but in the cleaning process, the working strength is high, the cleaning effect is uneven due to the manual use of the brushes, the maintenance of the mold is not facilitated, and the service life of the mold is reduced to a certain extent; meanwhile, the cleaning liquid is directly placed in the water pool, so that the utilization rate of the cleaning liquid is low, and the problem of resource waste is caused.
Therefore, how to improve the uniform cleaning of the mold and improve the utilization rate of the cleaning liquid is a problem which needs to be solved urgently.
Disclosure of Invention
The invention aims to provide a die cleaning device to solve the problems of uneven die cleaning and low cleaning liquid utilization rate in the prior art.
In order to achieve the purpose, the basic scheme of the invention is that the die cleaning device comprises a rack and a driving motor, wherein the output end of the driving motor is connected with a horizontally arranged turntable, the cross section of the turntable is circular, the die cleaning device also comprises a limiting cylinder vertically arranged on the rack, two ends of the limiting cylinder are provided with openings, and the edge of the turntable is in threaded connection with the inner wall of the limiting cylinder; the cleaning device is characterized in that a storage box body used for storing cleaning liquid is arranged at the lower end of the rotary table, an arc part is arranged at the lower end of the storage box body, a plurality of first through holes are formed in the arc part, two support rods which are of a hollow structure are hinged to the outer wall of the storage box body, a plurality of second through holes are formed in the outer wall of each support rod, a first spring is arranged between each support rod and the outer wall of the storage box body, each support rod is arranged in a downward inclined mode from the direction from the storage box body to the limiting cylinder, the inner portion of each support rod is communicated; a first barrel body positioned on the rack is arranged below the limiting barrel, a first opening is formed in the upper end of the first barrel body, a cavity used for storing cleaning liquid is formed in the side wall of the first barrel body, a third through hole is formed in the side wall of the first barrel body, a second barrel body is rotatably connected in the first barrel body, a second opening is formed in the upper end of the second barrel body, a plurality of clamping grooves are formed in the surface of the inner wall of the second barrel body, a fourth through hole is formed in the surface of the inner wall of the second barrel body, the axes of the fourth through hole and the third through hole are in the same horizontal plane, a through groove used for placing a mold is formed in the bottom of the second barrel body, a first flexible wiping part is arranged on the surface of the inner wall of the through groove, the through groove penetrates through the bottom of the second barrel body, a limiting plate extending; third open mouth below is equipped with the recovery box that is located the frame, be equipped with the washing subassembly in the recovery box, the washing subassembly includes first runner, and first runner is located third open-ended below, and first runner includes the first blade of a plurality of coaxial settings, the tip of first blade is equipped with the flexible portion of cleaning of second, be equipped with the second runner in the recovery box, the second runner includes the second blade of a plurality of coaxial settings, the axis distance between first runner and the second runner is less than the length of first blade with the second blade.
The working principle of the scheme is as follows: firstly, a mould to be cleaned is placed in a through groove in a second cylinder, at the moment, a driving motor is electrified and operated, the driving motor drives a turntable to rotate, the turntable rotates in a limiting cylinder and gradually moves downwards while the turntable rotates, the cleaning liquid in a storage box is gradually thrown away from the storage box through a first through hole under the action of centrifugal force, the cleaning liquid in a support rod is also thrown away from the support rod through a second through hole, and the thrown cleaning liquid is thrown onto the surface of the mould to be cleaned, so that the surface of the mould is preliminarily wetted; when the clamping block at the lower end of the supporting rod moves to a position corresponding to the clamping groove, the clamping block is limited in the clamping groove, the second cylinder and the supporting rod form a whole, the supporting rod drives the second cylinder to rotate while rotating, the third through hole and the fourth through hole are intermittently communicated in the rotating process of the second cylinder, so that the cleaning liquid in the cavity in the side wall of the first cylinder flows into the second cylinder, and the cleaning liquid is thrown onto the surface of the mold in the rotating process of the second cylinder, so that the surface of the mold is cleaned; make first flexible portion of wiping wash the mould side at second barrel pivoted in-process, when the washing liquid flows downwards, can hit first blade and rotate, first blade drives first runner and rotates, and the flexible portion of wiping of second of first blade tip washs the bottom of mould to the omnidirectional washs the mould.
Compared with the prior art, the technical scheme has the advantages that: 1. the cleaning liquid is thrown out of the storage box body and the supporting rod, so that the mold is firstly wetted and is continuously cleaned, the cleaning liquid can be thrown onto the surface of the mold in an all-around manner, and dirt on the surface of the mold can be removed by the thrown cleaning liquid under certain pressure; 2. the first flexible wiping part is arranged on the inner wall of the through groove, so that the side surface of the mold can be cleaned; 3. the process that flows downwards through the washing liquid drives the first runner to rotate, the second flexible wiping part of the first blade end part cleans the bottom of the die, the washing liquid continuously flows downwards and the process can continuously scour the second flexible wiping part, so that sundries on the second flexible wiping part can be timely cleaned, meanwhile, the first runner is driven to rotate in the process of rotating the first runner, the second runner drives the washing liquid in the recovery box to rotate, the washing liquid is continuously beated in the recovery box, so that the sundries on the second flexible wiping part can be timely cleaned, and the washing liquid on the second flexible wiping part can be timely supplemented, and the second flexible wiping part can better wipe the bottom of the die. According to the technical scheme, the mold can be cleaned in an all-around and uniform mode, the mold can be cleaned in a double mode, and the circulation utilization rate of the cleaning liquid is improved.
Further optimization, the bottom of the recovery box body is obliquely arranged, a water guide pipe is arranged at the bottom of the recovery box body, and a plunger is connected in the water guide pipe in a sliding manner; the discharging of the cleaning liquid can be controlled by opening or closing the plunger in the cleaning process, and meanwhile, the inclined bottom can enable heavy sundries to be discharged out of the recovery tank body through the water guide pipe.
Preferably, a second spring is arranged between the first flexible wiping part and the inner wall of the through groove; under the action of the elastic force of the second spring, the first flexible wiping part can be in sufficient contact with the surface of the mold, so that the surface of the mold can be better cleaned.
Further preferably, a stop block is arranged at the lower end of the limiting cylinder along the circumference; the rotating disc can be prevented from being separated from the limiting cylinder in the rotating process.
Further optimizing, the first flexible wiping part and the second flexible wiping part are both sponges; the sponge is a common component, and is favorable for later maintenance work.
Further preferably, a baffle is arranged at the upper end of the second cylinder along the circumference, and the baffle is obliquely and upwards arranged from the second cylinder to the first cylinder; the end part of the strut is gradually pressed into the second cylinder under the action of the baffle.
Drawings
FIG. 1 is a schematic view of a mold cleaning apparatus according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail below by way of specific embodiments:
reference numerals in the drawings of the specification include: the device comprises a rotary table 1, a limiting cylinder 2, a stopper 201, a storage box body 3, an arc portion 301, a support rod 4, a first spring 5, a clamping block 6, a first cylinder 7, a third through hole 701, a second cylinder 8, a fourth through hole 801, a baffle 9, a clamping groove 10, a through groove 11, a first flexible wiping portion 12, a mold 13, a limiting plate 14, a recovery box body 15, a water guide pipe 16, a plunger 17, a first blade 18, a second flexible wiping portion 19 and a second rotary wheel 20.
The embodiment is basically as shown in the attached figure 1: a mould cleaning device comprises a rack and a driving motor, wherein the output end of the driving motor is connected with a horizontally arranged turntable 1, the cross section of the turntable 1 is circular, the mould cleaning device also comprises a limiting cylinder 2 vertically arranged on the rack, and the lower end of the limiting cylinder 2 is provided with a stop block 201 along the circumference; two ends of the limiting cylinder 2 are opened, and the edge of the rotary table 1 is in threaded connection with the inner wall of the limiting cylinder 2; the lower end of the rotary table 1 is provided with a storage box body 3 for storing cleaning liquid, the lower end of the storage box body 3 is provided with an arc part 301, the arc part 301 is provided with a plurality of first through holes, the outer wall of the storage box body 3 is hinged with two support rods 4 which are of a hollow structure, the outer wall of each support rod 4 is provided with a plurality of second through holes, a first spring 5 is arranged between each support rod 4 and the outer wall of the storage box body 3, each support rod 4 is obliquely and downwards arranged from the storage box body 3 to the limiting cylinder 2, the interior of each support rod 4 is communicated with the interior of the storage box; a first barrel body 7 positioned on the rack is arranged below the limiting barrel 2, a first opening is arranged at the upper end of the first barrel body 7, a cavity for storing cleaning liquid is arranged on the side wall of the first barrel body 7, a third through hole 701 is arranged on the side wall of the first barrel body 7, a second barrel body 8 is connected in the first barrel body 7 in a rotating mode, a second opening is arranged at the upper end of the second barrel body 8, a baffle 9 is arranged at the upper end of the second barrel body 8 along the circumference, the baffle 9 is obliquely and upwards arranged from the second barrel body 8 to the first barrel body 7 from the second barrel body 8, a plurality of clamping grooves 10 are arranged on the inner wall surface of the second barrel body 8, a fourth through hole 801 is arranged on the inner wall surface of the second barrel body 8, the fourth through hole 801 and the axis of the third through hole 701 are in the same horizontal plane, a through groove 11 for placing a mold 13 is arranged at the bottom of the second barrel body 8, a first flexible wiping part, the through groove 11 penetrates through the bottom of the second barrel 8, the lower end of the through groove 11 is connected with a horizontally extending limiting plate 14, and the bottom of the first barrel 7 is provided with a third opening; a recovery box body 15 positioned on the rack is arranged below the third opening, the bottom of the recovery box body 15 is obliquely arranged, a water guide pipe 16 is arranged at the bottom of the recovery box body 15, a plunger piston 17 is connected in the water guide pipe 16 in a sliding manner, a cleaning component is arranged in the recovery box body 15, the cleaning component comprises a first rotating wheel, the first rotating wheel is positioned below the third opening, the first rotating wheel comprises a plurality of first blades 18 which are coaxially arranged, a second flexible wiping part 19 is arranged at the end part of each first blade 18, and the first flexible wiping part 12 and the second flexible wiping part 19 are sponges; a second rotating wheel 20 is arranged in the recycling box body 15, the second rotating wheel 20 is located below the first rotating wheel, the second rotating wheel 20 comprises a plurality of coaxially arranged second blades, and the axial distance between the first rotating wheel and the second rotating wheel 20 is smaller than the length of the first blades 18 plus the second blades.
The specific embodiment of the invention is as follows: firstly, a mold 13 to be cleaned is placed in a through groove 11 in a second barrel 8, the lower end of the mold 13 cannot slide down under the limiting action of a limiting plate 14, at the moment, a driving motor is electrified to operate, the driving motor drives a rotary table 1 to rotate, the rotary table 1 rotates in a limiting barrel 2 and gradually moves downwards while the rotary table 1 rotates, cleaning liquid in a storage box body 3 is gradually thrown away from the storage box body 3 through a first through hole under the action of centrifugal force, the cleaning liquid in a support rod 4 is also thrown away from the support rod 4 through a second through hole, the thrown-away cleaning liquid is thrown onto the surface of the mold 13 to be cleaned, and the surface of the mold 13 is preliminarily wetted; when the clamping block 6 at the lower end of the support rod 4 moves to a position corresponding to the clamping groove 10, the clamping block 6 is limited in the clamping groove 10, the second cylinder 8 and the support rod 4 form a whole, the support rod 4 rotates and simultaneously drives the second cylinder 8 to rotate, the third through hole 701 and the fourth through hole 801 are intermittently communicated in the rotating process of the second cylinder 8, so that the cleaning liquid in the cavity on the side wall of the first cylinder 7 flows into the second cylinder 8, and the cleaning liquid is thrown onto the surface of the mold 13 in the rotating process of the second cylinder 8, so that the surface of the mold 13 is cleaned; the side of the die 13 is cleaned by the first flexible wiping part 12 in the rotating process of the second cylinder 8, when the cleaning liquid flows downwards, the cleaning liquid can strike the first blade 18 to rotate, the first blade 18 drives the first rotating wheel to rotate, and the bottom of the die 13 is cleaned by the second flexible wiping part 19 at the end part of the first blade 18, so that the die 13 is cleaned in an all-dimensional manner.
The above description is only an example of the present invention, and general knowledge of the technical solutions and the like known in the art is not described herein too much. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several variations and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (6)

1. The utility model provides a mould cleaning device, includes frame, driving motor, and the carousel that the level set up is connected to the driving motor output, the cross section of carousel is circular, its characterized in that: the rotary table is characterized by further comprising a limiting cylinder vertically arranged on the rack, two ends of the limiting cylinder are provided with openings, and the edge of the rotary table is in threaded connection with the inner wall of the limiting cylinder; the cleaning device is characterized in that a storage box body used for storing cleaning liquid is arranged at the lower end of the rotary table, an arc part is arranged at the lower end of the storage box body, a plurality of first through holes are formed in the arc part, two support rods which are of a hollow structure are hinged to the outer wall of the storage box body, a plurality of second through holes are formed in the outer wall of each support rod, a first spring is arranged between each support rod and the outer wall of the storage box body, each support rod is arranged in a downward inclined mode from the direction from the storage box body to the limiting cylinder, the inner portion of each support rod is communicated; a first barrel body positioned on the rack is arranged below the limiting barrel, a first opening is formed in the upper end of the first barrel body, a cavity used for storing cleaning liquid is formed in the side wall of the first barrel body, a third through hole is formed in the side wall of the first barrel body, a second barrel body is rotatably connected in the first barrel body, a second opening is formed in the upper end of the second barrel body, a plurality of clamping grooves are formed in the surface of the inner wall of the second barrel body, a fourth through hole is formed in the surface of the inner wall of the second barrel body, the axes of the fourth through hole and the third through hole are in the same horizontal plane, a through groove used for placing a mold is formed in the bottom of the second barrel body, a first flexible wiping part is arranged on the surface of the inner wall of the through groove, the through groove penetrates through the bottom of the second barrel body, a limiting plate extending; third open mouth below is equipped with the recovery box that is located the frame, be equipped with the washing subassembly in the recovery box, the washing subassembly includes first runner, and first runner is located third open-ended below, and first runner includes the first blade of a plurality of coaxial settings, the tip of first blade is equipped with the flexible portion of cleaning of second, be equipped with the second runner in the recovery box, the second runner includes the second blade of a plurality of coaxial settings, the axis distance between first runner and the second runner is less than the length of first blade with the second blade.
2. The mold cleaning apparatus according to claim 1, wherein: the bottom of the recovery box body is obliquely arranged, the bottom of the recovery box body is provided with a water guide pipe, and a plunger is connected in the water guide pipe in a sliding mode.
3. The mold cleaning apparatus according to claim 1, wherein: and a second spring is arranged between the first flexible wiping part and the inner wall of the through groove.
4. The mold cleaning apparatus according to claim 1, wherein: and a stop block is arranged at the lower end of the limiting cylinder along the circumference.
5. The mold cleaning apparatus according to claim 1, wherein: the first flexible wiping part and the second flexible wiping part are both sponges.
6. The mold cleaning apparatus according to claim 1, wherein: the baffle is arranged at the upper end of the second cylinder along the circumference, and the baffle is obliquely and upwards arranged from the second cylinder to the first cylinder.
CN201810404767.9A 2018-04-28 2018-04-28 Mould cleaning device Active CN108620364B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810404767.9A CN108620364B (en) 2018-04-28 2018-04-28 Mould cleaning device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810404767.9A CN108620364B (en) 2018-04-28 2018-04-28 Mould cleaning device

Publications (2)

Publication Number Publication Date
CN108620364A CN108620364A (en) 2018-10-09
CN108620364B true CN108620364B (en) 2020-04-07

Family

ID=63695061

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810404767.9A Active CN108620364B (en) 2018-04-28 2018-04-28 Mould cleaning device

Country Status (1)

Country Link
CN (1) CN108620364B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112871764B (en) * 2020-12-11 2022-05-13 安徽宝隽机车部件有限公司 Automatic cleaning and wiping device of electric injection fuel pump
CN112842085B (en) * 2021-01-28 2022-10-14 重庆电子工程职业学院 Artificial intelligence cleaning mechanism for water dispenser
CN117753723B (en) * 2024-02-22 2024-06-21 威海沃尔威体育休闲用品有限公司 Cleaning device and method for artificial bait mould

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206926138U (en) * 2017-02-14 2018-01-26 吴光辉 A kind of plastic mould cleaning device
CN207254809U (en) * 2017-05-02 2018-04-20 福建省就创网络信息科技有限公司 Machine die cleaning device
CN207238581U (en) * 2017-08-01 2018-04-17 温州盛泰建设有限公司 A kind of construction test block mould washing tool

Also Published As

Publication number Publication date
CN108620364A (en) 2018-10-09

Similar Documents

Publication Publication Date Title
CN108620364B (en) Mould cleaning device
CN210788373U (en) Mould cleaning equipment
CN104550105A (en) Die cleaning device
CN114985335A (en) Mechanical die self-cleaning device
CN116498086A (en) Concrete split-point compacting device and application method thereof
CN110900850A (en) Glass cutting and cleaning integrated equipment and method
CN209006817U (en) A kind of steel scrap pipe Repair gene device
CN113000463B (en) Cleaning device for all-dimensional cleaning agricultural machinery
CN113680571A (en) Chassis accessory rust-proof treatment machine for new energy automobile
CN205926513U (en) Storage tank cleaning device
CN112427430A (en) Quick cleaning equipment of beverage bottle inner wall
CN108499913B (en) Auto parts belt cleaning device
CN113070248B (en) Mould hole cleaning and sterilizing equipment
CN214918625U (en) Gear-shaped automobile-used metal part mould cleaning device
CN211100603U (en) Hopper is from belt cleaning device
CN110252721B (en) Suitable automatic mold cleaning machine
CN210552646U (en) Cleaning and maintaining device for injection mold
CN111842321B (en) Mould part cleaning equipment
CN217191221U (en) Belt cleaning device is used in processing of glass mould hot forging
CN212792094U (en) Mould cleaning device
CN213378389U (en) Flushing device for casting mold
CN108435698B (en) Be used for abluent equipment of mould
CN209953357U (en) Belt cleaning device for wheel hub mould
CN107839117A (en) A kind of device for cleaning mould
CN215823728U (en) Cleaning device for maintenance of lathe spindle

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20210603

Address after: 315701 Xiangshan port industrial estate, Xian town, Xiangshan County, Ningbo, Zhejiang

Patentee after: NINGBO GAOSHENG MOULD MANUFACTURE Co.,Ltd.

Address before: 315000 room 803, building 21, Meiyuan community, Jingnan street, Dandong Street, Xiangshan County, Zhejiang Province

Patentee before: Song Junneng