CN109624210A

CN109624210A - A kind of plastic grain feeder

Info

Publication number: CN109624210A
Application number: CN201811559590.6A
Authority: CN
Inventors: 彭华雯
Original assignee: Ganzhou Tong Zhou Plastic Machine Co Ltd
Current assignee: Ganzhou Tong Zhou Plastic Machine Co Ltd
Priority date: 2018-12-20
Filing date: 2018-12-20
Publication date: 2019-04-16
Anticipated expiration: 2038-12-20
Also published as: CN109624210B

Abstract

The present invention provides a kind of plastic grain feeder, including staving, inner wall of barrel is equipped with heat-conducting plate, the open cavity in outer wall side is equipped in heat-conducting plate, curved cover plate is equipped on the outside of each open ports, the concave surface of curved cover plate is equipped with fever pipe mounting seat and heat-generating pipe, heat-generating pipe are located in cavity；Bucket is equipped at the top of staving, the stirring rod driven by driving motor is equipped in staving, the lower section of bucket is equipped with annular slab, the top surface of annular slab is equipped with two guide rails, guide rail is equipped with the block for blocking bucket bottom, and block is moved toward one another through screw rod driving by dual-axle motor or mutually away from movement；Stirring rod below annular slab is equipped with auger leaf；It has the function of being preheated to plastic grain, can shorten the thawing time of subsequent plastic grain, improves production efficiency；Its heat radiating structure is convenient for disassembly and assembly, convenient for the maintenance and replacement to heat radiating structure；And materials inside can be stirred, facilitate heat transfer, good pre-heat effect is provided.

Description

A kind of plastic grain feeder

Technical field

The present invention relates to feeder fields, more particularly to a kind of plastic grain feeder.

Background technique

Injection molding is also known as injection molding molding, it is a kind of forming method of simultaneous molding of injection, at a certain temperature, logical The plastic material that helical screw agitator melts completely is crossed, injects die cavity, after cooling and solidifying, the method that obtains molded product with high pressure.It should Method is suitable for the batch production of complex-shaped component, is important one of processing method.

In injection moulding process, generally all plastic grain is conveyed by feeder, is launched, existing feeder is most Do not have pre- heat function, the subsequent thawing to plastic grain is caused to take a long time, extends processing duration, reduce life Produce efficiency；Although a small number of feeders has pre- heat function, structure is complicated mostly for the preheating feeder of the type, internal hair Thermal dismounting is difficult, inconvenience maintenance and replacement, inconvenient；And the heat transfer between materials inside is uneven, is unable to reach Good pre-heat effect.

Summary of the invention

In order to overcome the drawbacks of the prior art, technical problem to be solved by the present invention lies in propose on a kind of plastic grain Material machine, structure novel have the function of being preheated to plastic grain, can shorten the thawing time of subsequent plastic grain, contracting Short processing duration improves production efficiency；Its heat radiating structure is convenient for disassembly and assembly, convenient for the maintenance and replacement to heat radiating structure；And It can control the addition of subsequent new material, and timing to stir materials inside, facilitates heat transfer, provides good preheating Effect.

For this purpose, the following technical solution is employed by the present invention:

The present invention provides a kind of plastic grain feeder, including staving, the staving bottom connection is equipped with feeder pipe, institute Feeder pipe is stated equipped with baiting valve, the inner wall of barrel is fixed with the vertically arranged heat-conducting plate of muti-piece, the width of the heat-conducting plate Degree is less than the radius length of the inner wall of barrel, heat-conducting plate described in muti-piece around the staving axis circumferentially array distribution, respectively The heat-conducting plate is fixedly connected far from the side wall of the staving axis with the inner wall of barrel, the bottom wall of the heat-conducting plate with it is described Staving bottom wall is fixedly connected and extends in the feeder pipe, and the top surface of the heat-conducting plate is from close to the one of the inner wall of barrel The one of the laterally closer staving axis is sloped downwardly setting；Cavity is equipped in each heat-conducting plate, the cavity is separate The side of the staving axis is equipped with the open ports through the bucket outer wall, and the heat-conducting plate and the staving are integrated knot Structure；

Be equipped with the curved cover plate for covering the open ports on the outside of each open ports, the curved cover plate it is recessed Face supports with the bucket outer wall and is fixedly connected by screw, and the concave surface of the curved cover plate is fixed with multiple heat-generating pipes Mounting base is equipped with heat-generating pipe in each fever pipe mounting seat, and the heat-generating pipe position is in the cavity；

Bucket is equipped in the staving, the outer wall of the bucket is adapted with the inner wall of barrel shape, the Sheng Hopper top exterior walls are equipped with the first bulge loop, and the staving top exterior walls are equipped with the second bulge loop, and the bucket is located at the staving Top, first bulge loop is located at the top outer of the staving and bottom surface and the top surface of second bulge loop support, described Staving top cover is equipped with bung, and the bung, first bulge loop, second bulge loop are bolted to connection, the bucket It covers connection and is equipped with commissioning pipe；

Support base is equipped with inside the low side of the feeder pipe, the side wall of the support base and the inner wall of the feeder pipe pass through A plurality of connecting rod is fixedly connected, and is equipped with stirring rod by bearing between the support base and the bung, the stirring rod Top is through the bung and the output shaft of end and driving motor is connected by shaft coupling, and the driving motor passes through support Frame is fixed at the bung top surface；The lower section of the bucket is equipped with annular slab, and the annular slab is waffle slab structure, described The outer wall of annular slab is fixedly connected with the inner wall of barrel, and the center of circle of the annular slab is on the axis of the staving, and institute State annular slab internal diameter be greater than the bucket feed opening diameter, the top surface of the annular slab is fixed with two guide rails, Two guide rails along the annular slab be arranged radially and two guide rails are on same straight line, two guide rails about The center line symmetrical setting of the annular slab, sliding is equipped with block, the top surface of the block and the Sheng on each guide rail The bottom surface of the discharge port of hopper is in sustained height, and the same side of two blocks is equipped with dual-axle motor, the dual-axle motor Two sides are equipped with screw rod, and two screw rods are set to the top surface of the annular slab by bearing block, and two screw rods are led with described Rail is parallel, and the end of two screw rods and two output shafts of the dual-axle motor are corresponding and connected by shaft coupling, each described Sliding is equipped with sliding block on screw rod, and two sliding blocks are corresponding with two blocks respectively and are respectively fixedly connected with, two blocks It is moved toward one another under the drive of two screw rods or mutually away from movement；The block is set in the middle part of the side of the stirring rod There is semicircular arc groove, the arc groove is adapted with the stirring rod-shape；It is stirred described in below the annular slab Bar is mixed equipped with auger leaf.

In preferably technical solution of the invention, the curved cover plate includes being mutually bonded fixed froth bed and aluminium alloy Layer, the aluminium alloy layer are located remotely from the side of the staving.

In preferably technical solution of the invention, installed on each curved cover plate at least provided with three heat-generating pipes Seat, three fever pipe mounting seats are vertically arranged and on same vertical lines, pacify in each fever pipe mounting seat The heat-generating pipe of dress is adapted with the cavity shape.

In preferably technical solution of the invention, it is equipped between two heat-generating pipes of arbitrary neighborhood for completely cutting off light Partition, the surrounding of the partition and the cavity inner wall support fixation；Corresponding three heat-generating pipes on the curved cover plate If being embedded with the window made of heat-protecting glass in each loophole there are three loophole.

In preferably technical solution of the invention, the walled thickness of the heat-conducting plate is 1mm~3mm.

In preferably technical solution of the invention, the staving bottom structure funnel-shaped, the bottom of the heat-conducting plate with The staving bottom interior wall shape is adapted.

The invention has the benefit that

A kind of plastic grain feeder provided by the invention, structure novel, the design of heat-conducting plate and heat-generating pipe make its tool The standby function that plastic grain is preheated, so that plastic grain has certain temperature before entering smelting furnace, after can shortening The thawing time of continuous plastic grain shortens processing duration, improves production efficiency；Its curved cover plate for being used to install heat-generating pipe It is connected by screw between staving, can be easy to disassemble, convenient maintenance or replacement to heat-generating pipe, even if in the normal work of feeder The replacement of heat-generating pipe can also be carried out in the case of work；The design of its bucket can carry out one to the material of subsequent addition and keep in, and Dual-axle motor, lead screw, block cooperation under control additive amount, preventing from excessively adding materials causes warmed-up to complete temperature of charge Decline；And the cooperation of driving motor, stirring rod and auger leaf, when not being that injection molding machine is fed, auger Leaf is up rotated with stirring rod, is stirred to material, and heat transfer is facilitated, and provides good pre-heat effect；When needs are note When molding machine is fed, auger leaf rotates down with stirring rod, accelerates discharge, prevents from blocking.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of the plastic grain feeder provided in specific embodiments of the present invention；

Fig. 2 is the annular slab provided in specific embodiments of the present invention and its top view of top surface structure；

Fig. 3 is the structural schematic diagram of the curved cover plate provided in specific embodiments of the present invention.

In figure:

100, staving；110, feeder pipe；120, baiting valve；130, the second bulge loop；140, support base；150, connecting rod； 160, annular slab；170, guide rail；180, block；190, arc groove；200, heat-conducting plate；210, cavity；220, open ports；230, every Plate；300, curved cover plate；310, fever pipe mounting seat；320, heat-generating pipe；330, froth bed；340, aluminium alloy layer；350, light transmission Hole；360, window；400, bucket；410, the first bulge loop；500, bung；510, commissioning pipe；520, support frame；610, it stirs Bar；620, driving motor；630, auger leaf；710, dual-axle motor, 720, screw rod；730, sliding block.

Specific embodiment

To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.

As shown in Figure 1 and Figure 2, a kind of plastic grain feeder, including staving are disclosed in specific embodiments of the present invention 100,100 bottom of the staving connection is equipped with feeder pipe 110, and the feeder pipe 110 is equipped with baiting valve 120, the staving 100 Inner wall is fixed with the vertically arranged heat-conducting plate 200 of muti-piece, and the width of the heat-conducting plate 200 is less than 100 inner wall of staving Radius length, circumferentially array distribution, each heat-conducting plate 200 are remote around the axis of the staving 100 for heat-conducting plate 200 described in muti-piece Side wall from 100 axis of staving is fixedly connected with 100 inner wall of staving, the bottom wall and the bucket of the heat-conducting plate 200 100 bottom wall of body is fixedly connected and extends in the feeder pipe 110, and the top surface of the heat-conducting plate 200 is from close to the staving The one of laterally closer 100 axis of staving of the one of 100 inner walls is sloped downwardly setting；It is equipped in each heat-conducting plate 200 Cavity 210, the cavity 210 are equipped with the open ports through 100 outer wall of staving far from the side of 100 axis of staving 220, the heat-conducting plate 200 is structure as a whole with the staving 100；

The outside of each open ports 220 is equipped with the curved cover plate 300 for covering the open ports 220, the arc The concave surface of shape cover board 300 supports with 100 outer wall of staving and is fixedly connected by screw, the concave surface of the curved cover plate 300 Multiple fever pipe mounting seats 310 are fixed with, heat-generating pipe 320, the heat-generating pipe are installed in each fever pipe mounting seat 310 320 are located in the cavity 210；

Bucket 400, the outer wall of the bucket 400 and the 100 inner wall shape phase of staving are equipped in the staving 100 Adaptation, 400 top exterior walls of bucket are equipped with the first bulge loop 410, and 100 top exterior walls of staving are equipped with the second bulge loop 130, The bucket 400 is located at the top of the staving 100, first bulge loop 410 be located at the staving 100 top outer, And bottom surface and the top surface of second bulge loop 130 support, 100 top cover of staving is equipped with bung 500, the bung 500, institute State the first bulge loop 410, second bulge loop 130 is bolted to connection, on the bung 500 connection be equipped with commissioning pipe 510；

Support base 140, the side wall and the feeder pipe of the support base 140 are equipped with inside the low side of the feeder pipe 110 110 inner wall is fixedly connected by a plurality of connecting rod 150, is worn between the support base 140 and the bung 500 by bearing There is stirring rod 610, the top of the stirring rod 610 is logical through the output shaft of the bung 500 and end and driving motor 620 Shaft coupling connection is crossed, the driving motor 620 is fixed at 500 top surface of bung by support frame 520；The bucket 400 lower section is equipped with annular slab 160, and the annular slab 160 is waffle slab structure, the outer wall and the bucket of the annular slab 160 100 inner wall of body is fixedly connected, and the center of circle of the annular slab 160 is on the axis of the staving 100, and the annular slab 160 Internal diameter be greater than the bucket 400 feed opening diameter, as shown in Fig. 2, the top surface of the annular slab 160 is fixed with two Guide rail 170, two guide rails 170 along the annular slab 160 be arranged radially and two guide rails 170 are in always On line, center line symmetrical setting of two guide rails 170 about the annular slab 160, sliding is equipped on each guide rail 170 The bottom surface of the discharge port of block 180, the top surface of the block 180 and the bucket 400 is in sustained height, two blocks 180 the same side is equipped with dual-axle motor 710, and the two sides of the dual-axle motor 710 are equipped with screw rod 720, and two screw rods 720 are logical The top surface that bearing block is set to the annular slab 160 is crossed, and two screw rods 720 are parallel with the guide rail 170, two screw rods 720 end is corresponding with two output shafts of the dual-axle motor 710 and is connected by shaft coupling, sliding on each screw rod 720 Dynamic to be equipped with sliding block 730, two sliding blocks 730 are corresponding with two blocks 180 respectively and are respectively fixedly connected with, two blocks 180 move toward one another under the drive of two screw rods 720 or mutually away from movement；The block 180 is close to the stirring rod 610 Side in the middle part of be equipped with semicircular arc groove 190, the arc groove 190 is adapted with 610 shape of stirring rod；Positioned at institute The stirring rod 610 for stating 160 lower section of annular slab is equipped with auger leaf 630.

A kind of above-mentioned plastic grain feeder, structure novel, the heat-conducting plate 200 and the heat-generating pipe 320 are set Meter, makes it have the function of being preheated to plastic grain, so that plastic grain has certain temperature before entering smelting furnace, The thawing time of subsequent plastic grain can be shortened, shorten processing duration, improve production efficiency；It is used to install the fever It is connected by screw between the curved cover plate 300 and the staving 100 of pipe 320, can be easy to disassemble, it is convenient to the fever The maintenance or replacement of pipe 320 can also carry out the replacement of the heat-generating pipe 320 even if under feeder normal operation；Its institute The design for stating bucket 400 can carry out one to the material of subsequent addition and keep in, and in the dual-axle motor 710, the lead screw 720, additive amount is controlled under the cooperation of the block 180, preventing from excessively adding materials causes warmed-up temperature of charge of completing to decline； And the cooperation of the driving motor 620, the stirring rod 610 and the auger leaf 630, it be not that injection molding machine is fed When, the auger leaf 630 is up rotated with the stirring rod 610, and material is stirred, heat transfer is facilitated, Good pre-heat effect is provided；When needing to be fed for injection molding machine, the auger leaf 630 is with the stirring rod 610 It rotates down, accelerates discharge, prevent from blocking.

Further, the curved cover plate 300 includes being mutually bonded fixed froth bed 330 and aluminium alloy layer 340, described Aluminium alloy layer 340 is located remotely from the side of the staving 100；The design of the froth bed 330 and the aluminium alloy layer 340 can structure At insulating layer, it is ensured that a large amount of heat lock stays in the cavity 210, and the heat losses for preventing the heat-generating pipe 320 from generating subtract Little waste.

Further, as shown in figure 3, at least provided with three fever pipe mounting seats on each curved cover plate 300 310, three fever pipe mounting seats 310 are vertically arranged and on same vertical lines, each fever pipe mounting seat The heat-generating pipe 320 installed on 310 is adapted with 210 shape of cavity；At least three fever pipe mounting seats are installed 310 can provide enough heats；The length of the heat-generating pipe 320 is adapted with the width of the cavity 210 to be made as far as possible It obtains the heat-generating pipe 320 and 210 inner wall of cavity is close, improve heat transfer effect；And the heat-generating pipe 320 is independent Body, wherein one burn out after single can replace, the heat-generating pipe 320 can also be carried out even if under feeder normal operation Replacement reduces waste and reduces cost.

Further, the partition 230 for completely cutting off light, institute are equipped between arbitrary neighborhood two heat-generating pipes 320 The surrounding and 210 inner wall of cavity for stating partition 230 support fixation；Corresponding three heat-generating pipes on the curved cover plate 300 320 set there are three loophole 350, are embedded with window 360 made of heat-protecting glass in each loophole 350；It is described every The cooperation of plate 230 and the loophole 350 can be convenient for checking the working condition of each heat-generating pipe 320 in time from outside, in time It was found that whether the heat-generating pipe 320 burns out, it is convenient for on-call maintenance or replacement, guarantees normal heat supply；The window 360 uses Heat-protecting glass, which is made, can reduce scattering and disappearing for heat.

Further, the walled thickness of the heat-conducting plate 200 is 1mm~3mm；The heat-conducting plate 200 can using the structure It is transmitted convenient for heat, improves pre-heat effect.

Further, 100 bottom of staving structure funnel-shaped, the bottom of the heat-conducting plate 200 and the staving 100 Bottom interior wall shape is adapted；The bottom of the staving 100 is funnel-shaped to converge convenient for plastic grain toward 100 bottom of staving Collection, when the baiting valve 120 being facilitated to open, plastic grain can be unloaded smoothly, be entered in next equipment.

Working principle

The detailed process that the present invention preheats plastic grain is, first through the commissioning pipe 510 toward the staving 100 A certain amount of plastic grain is launched, then starts the dual-axle motor 710, two blocks 180 are close to each other and stir with described It mixes 610 activity of bar to support, and then continues to launch plastic grain through the commissioning pipe 510, be temporarily stored in the bucket 400； Then start the heat-generating pipe 320 and the driving motor 620, the heat-generating pipe 320 continues heat supply, carries out in advance to plastic grain Heat, 620 gap of the driving motor reversion drive the auger leaf 630 up to rotate, and stir to material, convenient Heat transfer provides good pre-heat effect；When needing to be fed for injection molding machine, the baiting valve 120, the drive are opened Dynamic 620 main story of motor drives the auger leaf 630 to rotate down, thus realize acceleration discharge, the baiting valve 120 Default opening time reach after, close the baiting valve 120 and the reversion of starting 620 gap of driving motor, the spiral Paddle 630 up rotates, and stirs to material, continues to preheat；After the baiting valve 120 opens certain number, open The dual-axle motor 710 is moved, so that two blocks 180, away from movement, plastic grain falls to institute from the bucket 400 The lower section of annular slab 160 is stated, after open state maintains preset duration, starts the dual-axle motor 710 and inverts, two blocks 180 move toward one another and block the feed opening of the bucket 400, then continue above-mentioned preheating movement；It should be noted that Staff can check the working condition of the corresponding heat-generating pipe 320 by the loophole 350, if finding the heat-generating pipe 320 break down or burn out, then need to replace the heat-generating pipe 320, can be direct when replacing the heat-generating pipe 320 The corresponding curved cover plate 300 is removed, the heat-generating pipe 320 replaced will be needed to be replaced.

The present invention is described with reference to the preferred embodiments, and those skilled in the art know, of the invention not departing from In the case where spirit and scope, various changes or equivalence replacement can be carried out to these features and embodiment.The present invention is not by this The limitation of specific embodiment disclosed in place, other embodiments fallen into claims hereof belong to protection of the present invention Range.

Claims

1. a kind of plastic grain feeder, including staving (100), staving (100) the bottom connection is equipped with feeder pipe (110), The feeder pipe (110) is equipped with baiting valve (120), it is characterised in that:

Staving (100) inner wall is fixed with the vertically arranged heat-conducting plate of muti-piece (200), the width of the heat-conducting plate (200) Less than the radius length of the staving (100) inner wall, heat-conducting plate (200) described in muti-piece is in circle around the axis of the staving (100) All array distributions, side wall and the staving (100) inner wall of each heat-conducting plate (200) far from the staving (100) axis are solid Fixed connection, the bottom wall of the heat-conducting plate (200) are fixedly connected with the staving (100) bottom wall and extend to the feeder pipe (110) in, the top surface of the heat-conducting plate (200) is certainly close to the laterally closer staving (100) of the staving (100) inner wall The one of axis is sloped downwardly setting；It is equipped with cavity (210) in each heat-conducting plate (200), the cavity (210) is far from institute State staving (100) axis side be equipped with through the staving (100) outer wall open ports (220), the heat-conducting plate (200) with The staving (100) is structure as a whole；

The curved cover plate (300) for covering the open ports (220) is equipped on the outside of each open ports (220), it is described The concave surface of curved cover plate (300) supports and is fixedly connected by screw, the curved cover plate with the staving (100) outer wall (300) concave surface is fixed with multiple fever pipe mounting seats (310), is equipped with fever on each fever pipe mounting seat (310) It manages (320), the heat-generating pipe (320) is located in the cavity (210)；

Bucket (400) are equipped in the staving (100), the outer wall and the staving (100) inner wall shape of the bucket (400) Shape is adapted, and bucket (400) top exterior walls are equipped with the first bulge loop (410), and staving (100) top exterior walls are equipped with the Two bulge loops (130), the bucket (400) are located at the top of the staving (100), and first bulge loop (410) is located at described The top outer of staving (100) and bottom surface and the top surface of second bulge loop (130) support, staving (100) top cover is set Have bung (500), the bung (500), first bulge loop (410), second bulge loop (130) company of being bolted It connects, connection is equipped with commissioning pipe (510) on the bung (500)；

Support base (140) are equipped with inside the low side of the feeder pipe (110), the side wall of the support base (140) and the blanking The inner wall of pipe (110) is fixedly connected by a plurality of connecting rod (150), is led between the support base (140) and the bung (500) It crosses bearing to be equipped with stirring rod (610), the top of the stirring rod (610) is through the bung (500) and end and driving electricity The output shaft of machine (620) is connected by shaft coupling, and the driving motor (620) is fixed at the bucket by support frame (520) Cover (500) top surface；The lower section of the bucket (400) is equipped with annular slab (160), and the annular slab (160) is waffle slab structure, The outer wall of the annular slab (160) is fixedly connected with the staving (100) inner wall, and the center of circle of the annular slab (160) is in institute On the axis for stating staving (100), and the internal diameter of the annular slab (160) is greater than the diameter of the feed opening of the bucket (400), The top surface of the annular slab (160) is fixed with two guide rails (170), and two guide rails (170) are along the annular slab (160) Be arranged radially and two guide rails (170) are on same straight line, two guide rails (170) are about the annular slab (160) Center line symmetrical setting, sliding is equipped with block (180), the top surface of the block (180) and institute on each guide rail (170) The bottom surface for stating the discharge port of bucket (400) is in sustained height, and the same side of two blocks (180) is equipped with dual-axle motor (710), the two sides of the dual-axle motor (710) are equipped with screw rod (720), and two screw rods (720) are set to institute by bearing block The top surface of annular slab (160) is stated, and two screw rods (720) are parallel with the guide rail (170), two screw rods (720) End is corresponding with two output shafts of the dual-axle motor (710) and is connected by shaft coupling, sliding on each screw rod (720) Dynamic to be equipped with sliding block (730), two sliding blocks (730) are corresponding with two block (180) respectively and are respectively fixedly connected with, two institutes Block (180) is stated to move toward one another under the drive of two screw rods (720) or mutually away from movement；The block (180) is close Semicircular arc groove (190) are equipped in the middle part of the side of the stirring rod (610), the arc groove (190) and the stirring rod (610) shape is adapted；The stirring rod (610) below the annular slab (160) is equipped with auger leaf (630)。

2. a kind of plastic grain feeder according to claim 1, it is characterised in that:

The curved cover plate (300) includes being mutually bonded fixed froth bed (330) and aluminium alloy layer (340), the aluminium alloy Layer (340) is located remotely from the side of the staving (100).

3. a kind of plastic grain feeder according to claim 1, it is characterised in that:

At least provided with three fever pipe mounting seats (310), three heat-generating pipe installations on each curved cover plate (300) Seat (310) is vertically arranged and on same vertical line, the hair installed on each fever pipe mounting seat (310) Heat pipe (320) is adapted with the cavity (210) shape.

4. a kind of plastic grain feeder according to claim 4, it is characterised in that:

The partition (230) for completely cutting off light, the partition are equipped between arbitrary neighborhood two heat-generating pipes (320) (230) surrounding and the cavity (210) inner wall supports fixation；Corresponding three heat-generating pipes on the curved cover plate (300) (320) it sets there are three loophole (350), each loophole (350) is interior to be embedded with the window made of heat-protecting glass (360)。

5. a kind of plastic grain feeder according to claim 1, it is characterised in that:

The walled thickness of the heat-conducting plate (200) is 1mm~3mm.

6. a kind of plastic grain feeder according to claim 1, it is characterised in that:

In staving (100) bottom structure funnel-shaped, the bottom of the heat-conducting plate (200) and the staving (100) bottom Wall shape is adapted.