CN207447760U - A kind of efficient feed mechanism for DC plug production line - Google Patents

Abstract

The utility model discloses a kind of efficient feed mechanisms for DC plug production line, this includes rack for the efficient feed mechanism of DC plug production line, it is used to screen and the vibrating disk of conveying parts, multiple conveying guide rails, multiple delivery pipe, stock guide and mould items conveyed with air pressure including what is be connected with each other from upstream to downstream, multiple material guide holes are provided on the stock guide, each material guide hole is connected with a delivery pipe；Receiving hole is provided on the mould item, the receiving hole is several times as much as material guide hole, the first delivery device for promoting stock guide mobile and material guide hole is aligned to receiving hole being provided in the rack, with whole-process automatic operation, the advantages of intelligence degree is high, and part can be disposably loaded in batches, to carry out batches of processing or assembling, substantially increase production efficiency.

Description

A kind of efficient feed mechanism for DC plug production line

Technical field

The utility model is related to a kind of automatic production lines, more particularly to a kind of efficient feeding for DC plug production line Mechanism.

Background technology

DC plug line is mainly assemblied in GSM CDMA, digital camera, video recorder, combination audio, MP3, DVD etc. On electronic product, with the increase year by year of its quantity, it certainly will need to improve production efficiency and the degree of automation.

Authorization Notice No. is that the Chinese patent of CN202423798 discloses a kind of be used on DC plug automatic processing device Feeding device, including pan feeding, discharging structure and conveyance conduit, the feeding structure is by deflector chute, material splitting cylinder component and air blowing Component is formed, and one end of the deflector chute is communicated with vibrating disk, and the other end is connected with conveyance conduit, and deflector chute is equipped with air inlet Mouthful, material splitting cylinder component is arranged at the one side of the deflector chute, is made of forward and backward two cylinder；The discharging structure includes installation Plate, the pusher cylinder being fixed on the installing plate and blanking block, the blanking block are equipped with material-dropping hole, the lower section of the material-dropping hole It equipped with blow tank, is communicated at the top of the blow tank with material-dropping hole, the pusher cylinder plunger boom end is equipped with pusher part, the pusher Part is engaged with the discharge chute mouth.

Its feeding device is sent workpiece to discharging structure from feeding structure using air-flow, be pushed into automatic processing device into Material mouth realizes the automatic charging one by one of workpiece to be processed；But the feeding structure of this feeding one by one is still not enough efficiently.

Utility model content

The purpose of this utility model is to provide a kind of efficient feed mechanism for DC plug production line, solves existing Production line the problem of loading efficiency is not high enough one by one.

The above-mentioned technical purpose of the utility model technical scheme is that：

A kind of efficient feed mechanism for DC plug production line including rack, is further included and mutually interconnected from upstream to downstream What is connect is used to screen and the vibrating disk of conveying parts, multiple conveying guide rails, multiple delivery pipe, stock guide and use conveyed with air pressure In the mould item that feed is concentrated to production line, be provided with multiple material guide holes on the stock guide, each material guide hole and one it is defeated Pipe is sent to connect；Receiving hole is provided on the mould item, the receiving hole is several times as much as material guide hole, the drive being provided in the rack Stock guide is mobile and material guide hole is aligned to the first delivery device of different receiving holes.

Using the above program, when work, part, to conveying guide rail feeding, and is led to by the vibrating transportation of vibrating disk Cross the front and rear conveying power pushed and the part on conveying guide rail is provided；When being delivered to end, pass through blowing part for air pressure Delivery pipe is blown into, and passes through delivery pipe to stock guide feeding, this process allows delivery pipe there are certain curvature, so as to reduce To conveying the limitation in place；Material guide hole receiving hole docking corresponding on mould item simultaneously in this process on stock guide； When the blank dispensing in delivery pipe be delivered to material guide hole after, be directly entered receiving hole along material guide hole；Then pass through movement Stock guide causes material guide hole to be docked with another batch of receiving hole, with this so that part conveying capacity on mould item former material guide hole number Double increase again on the basis of amount, so that mould item can disposably load part in batches, in order to which production line matches somebody with somebody blank Material carries out batches of processing or assembling, substantially increases production efficiency.

Further preferably：The material distributing rest that the end of the conveying guide rail is provided with, be provided on the material distributing rest with often The sub-material passage of a conveying guide rail connection is provided with cutting plate on the material distributing rest and promotes the first cylinder of cutting plate movement, The material-distributing hole of integer times sub-material passage is provided on the cutting plate, each delivery pipe is connected to the upper of material-distributing hole Portion's opening, the lower part of the material-distributing hole are provided with the pneumatics connector connected with air compressor machine.

Using the above program, cutting plate movement adjusts different material-distributing hole and is docked with sub-material passage, thus by sub-material passage On blank dispensing be delivered in batches in different delivery pipes, be further added by one in original batch mode with this changes in batches Amount；And in this way, the different material-distributing holes corresponding to same sub-material passage can be existed with smaller gap arrangement As long as conveying is can be completed into two adjacent material-distributing holes and the connection of conveying passage when conveying.

Further preferably：Material-distributing hole on the cutting plate is twice of sub-material passage；The end of the material distributing rest is set It is just two different sub-materials to be equipped with the distance between first baffle, the whole story position that the cutting plate is stopped by first baffle Hole and the distance of sub-material passage transposition.

Using the above program, stopped by first baffle, cylinder is divided into two positioning states, i.e. initiating terminal and end；Respectively The docking location of corresponding two different material-distributing holes and sub-material passage；It is simple in structure, and aligning accuracy is high, it is easy to accomplish stablize Conveying.

Further preferably：First delivery device includes promoting the 3rd cylinder that moves up and down of stock guide and promotes the The second cylinder that three cylinders are moved along the direction that receiving hole is arranged.

Using the above program, after part is packed into receiving hole, part has part and exposes from the top of receiving hole, passes through The moving up and down of 3rd cylinder can complete material guide hole and the part of exposing is avoided；And the movement of the second cylinder can will not Material guide hole with batch is docked with receiving hole, so as to complete the multiplication of shipped quantity, adds single batch of conveying capacity of processing in batching； Improve production efficiency.

Further preferably：Push frame is provided in the rack, horizontal sliding is connected with by second on the push frame The horizontal slider that cylinder promotes；The horizontal slider is equipped with vertical frame and the 3rd cylinder, sets that there are two vertical in the vertical frame Slide, on the upright slide rail sliding be connected with the upright slide block moved up and down by the drive of the 3rd cylinder, the stock guide with it is perpendicular Straight sliding block is fixedly connected.

Using the above program, it is steady in moving process to improve stock guide as carrier for horizontal slider and upright slide block It is qualitative, during up and down motion, certain deflection torque will necessarily be generated by the effect of stock guide gravity, it is perpendicular using two Straight slide can strengthen the resistance to this deflection torque；It can give cylinder enough peaces using the form of this carrier simultaneously Fill space；In order to avoid interference is generated to two cylinders.

Further preferably：The bottom of the stock guide is provided with the locating detent of multiple mould outer wall cooperations, the positioning Guide surface is provided on the inside of pawl.

Using the above program, locating detent plays the role of guiding and positioning when stock guide is docked with mould item so that The two can accurately be completed to dock.

Further preferably：The second block being provided on the push frame, and the horizontal slider is hindered by the second block Initial position to next integral multiple hole position that the distance between whole story position of gear is just docked for material guide hole with receiving hole is right Spacing between the corresponding aperture connect.

Using the above program, stopped by the second block, the second cylinder is equally divided into two positioning states, i.e. initiating terminal and end End；The position that the receiving hole adjacent with two of respectively material guide hole is docked；It is simple in structure, and aligning accuracy is high, it is easy to accomplish it is steady Fixed conveying.

Further preferably：It is provided with to transport the transfer assembly of mould item in the rack, the feed mechanism includes Two loading assemblies for being located at upstream and downstream respectively；Two loading assemblies include vibrating disk, conveying guide rail, delivery pipe and guide Plate；And the stock guide of two upper loading assemblies is respectively positioned at the both sides arranged along hole of mould item.

Using the above program, the useful load of mould item is increased again so that splicing on original carrying capacity again It doubles；It is disposably processed simultaneously so as to fulfill high-volume, substantially increases production efficiency.

Further preferably：The quantity of the conveying guide rail is 4, and material guide hole is 8, and receiving hole is 32, and guide The centre-to-centre spacing in hole is twice of receiving hole.

Using the above program, entire mechanism is by repeatedly doubling so that the part that receiving hole receives is from script delivery pipe On the basis of complete multiplication three times；In the case where basic value is 4, the value after multiplication is 32, has more suitable transverse direction Size and conveying, processing capacity.

In conclusion the utility model has the advantages that：

1st, by be layered it is incremental in a manner of, only just realized by simple structure by the concentration feeding of 4 to 32；So that mould item Part can be disposably loaded in batches, in order to which production line carries out batches of processing or assembling to blank dispensing, greatly improved Production efficiency；

2nd, each mechanism only needs two-point locating, and aligning accuracy is high, and it is low to be not likely to produce deviation and repair, maintenance cost；

3rd, whole-process automatic operation, intelligence degree are high.

Description of the drawings

Fig. 1 is the structure chart of the DC plug production line of embodiment 1；

Fig. 2 is the structure chart of the loading assemblies of embodiment 1；

Fig. 3 is the conveying guide rail of embodiment 1 and the connection structure diagram of material distributing rest；

Fig. 4 be embodiment 1 conveying guide rail and material distributing rest another visual angle structure chart；

Fig. 5 is the connection structure diagram of the first delivery device of embodiment 1, stock guide and mould item；

Fig. 6 is the first delivery device part-structure figure of embodiment 1；

Fig. 7 is the structure chart of the stock guide of embodiment 1；

Fig. 8 is the structure chart of the mould item of embodiment 1；

Fig. 9 is the structure chart of the transfer assembly of embodiment 1；

Figure 10 is enlarged drawings of the Fig. 9 of embodiment 1 at A；

Figure 11 is the pressing plate of embodiment 1 and the structure diagram of briquetting；

Figure 12 is the structure chart at another visual angle of the transfer assembly of embodiment 1；

Figure 13 is enlarged drawings of the Fig. 9 of embodiment 1 at B；

Figure 14 is the structure chart of the part of embodiment 1.

In figure, 1, rack；2nd, loading assemblies；3rd, transfer assembly；10th, part；21st, vibrating disk；22nd, conveying guide rail；23rd, divide Rack；231st, sub-material passage；232nd, material-distributing hole；233rd, cutting plate；234th, first baffle；235th, the first cylinder；236th, pneumatics connects Head；24th, delivery pipe；25th, stock guide；251st, material guide hole；252nd, locating detent；26th, mould item；261st, receiving hole；262nd, lug；27、 First delivery device；271st, frame is pushed；272nd, the second cylinder；273rd, horizontal slider；274th, the 3rd cylinder；275th, the second block； 276th, upright slide block；277th, vertical frame；278th, upright slide rail；28th, lightening hole；31st, conveyer frames；311st, conduit；32nd, straddle；33rd, it is horizontal To slide；331st, clamping jaw；332nd, card slot；34th, horizontal pushing cylinder；35th, lead；36th, upper push cylinder；37th, supporting plate；371st, sliding sleeve； 38th, transverse slider；39th, pressing plate；391st, briquetting；392nd, precompressed hole；393rd, pre-compressed spring.

Specific embodiment

The utility model is described in further detail below in conjunction with attached drawing.

This specific embodiment is only explanation to the utility model, is not the limitation to the utility model, ability Field technique personnel can as needed make the present embodiment the modification of no creative contribution after this specification is read, but As long as within the protection scope of the present utility model all protected be subject to Patent Law.

A kind of efficient feed mechanism for DC plug production line, as illustrated in fig. 1 and 2, including rack 1, for production Line concentrates the mould item 26 of feed, for transmitting the loading assemblies 2 that the transfer assembly 3 of mould item 26 and two are located at upstream and downstream respectively. It is provided with vertical in the evenly arranged receiving hole 261 of direction of transfer on mould item 26, receiving hole 261 is for loading the zero of DC plug Part, part is with reference to Figure 10.

With reference to Fig. 2, two loading assemblies 2 include leading from 21, four conveyings of vibrating disk that upstream to downstream is connected with each other 22, one, rail material distributing rest 23, eight is with the delivery pipe 24 of air pressure conveying parts and a stock guide 25；But two loading assemblies 2 Stock guide 25 respectively positioned at the both sides that mould item 26 is arranged along hole.Vibrating disk 21 is mainly used for screening and provides part movement Power；Conveying guide rail 22 is connected with the conveying end of vibrating disk 21.

With reference to Fig. 3 and Fig. 4, the end of conveying guide rail 22 is connected to material distributing rest 23, sub-material passage is provided on material distributing rest 23 231st, 233 and first cylinder 235 of cutting plate.Each sub-material passage 231 is connected with a conveying guide rail 22；It is set on cutting plate 233 Be equipped with material-distributing hole 232, material-distributing hole 232 is twice of sub-material passage 231, and material-distributing hole 232 using four be a component as two groups, often It is intervally arranged between the material-distributing hole 232 of group；First cylinder 235 promote cutting plate 233 move so that one group of material-distributing hole 232 with Sub-material passage 231 docks.For the ease of positioning, the end of material distributing rest 23 is provided with first baffle 234, is hindered by first baffle 234 Gear, cylinder are divided into two positioning states, i.e. initiating terminal and end；Two adjacent material-distributing holes 232 and sub-material passage are corresponded to respectively 22 docking location.The lower part of each material-distributing hole 232 is both provided with the pneumatics connector 236 connected with air compressor machine, material-distributing hole 232 Upper opening is all connected with there are one delivery pipe 24.During work, lower section is blown by the air pressure of air compressor machine, and part is blown into the defeated of top It send in pipe 24.

With reference to Fig. 2 and Fig. 5, the other end of delivery pipe 24 is connected to the material guide hole 25 set on stock guide 25, each guide Hole is connected with 25 1 delivery pipes 24.The first delivery device 27 that stock guide 25 is promoted to move is provided in rack 1.

With reference to Fig. 5 and Fig. 6, the first delivery device 27 includes push frame 271, pushes for setting and being fixedly connected on frame 271 Two cylinders 272, the horizontal slider 273 for sliding connection and the second block 275 for sliding end for being blocked in horizontal slider 273；By Second block stops that the second cylinder 272 is equally divided into two positioning states, initiating terminal and end be respectively material guide hole 251 with The position that two adjacent receiving holes 261 are docked.The side of horizontal slider 273 is fixed with vertical frame 277, and is provided in vertical frame 277 Three 274, two, cylinder upright slide rails 278 and sliding are connected to the upright slide block 276 on two upright slide rails 278；Upright slide block 276 are moved up and down by the drive of the 3rd cylinder 274, and stock guide 25 is fixed on the outer surface by proximal end of upright slide block 276；It is perpendicular Directly the end of sliding block 276 is again provided with stopping, when being blocked, stock guide 25 is in the upper surface of mould item 26.

With reference to Fig. 5, Fig. 7 and Fig. 8, the bottom of stock guide 25 is provided with the locating detent 252 of multiple 26 outer wall of mould item cooperations, fixed The inside of position pawl 252 is provided with guide surface.Locating detent 252 plays guiding and positioning when stock guide 25 is docked with mould item 26 Effect so that the two can accurately be completed to dock.

In addition, multiple lightening holes 28 are both provided on stock guide 25 and mould item 26.

In conclusion with reference to Fig. 2, it is incremented by delivery system and is broadly divided into level Four；

First order delivery system is：Conveying guide rail 22 and sub-material passage 231, quantity are respectively 4；

Second level delivery system is：Material-distributing hole 232, delivery pipe and material guide hole 251, quantity is 8, with 4 for a component Do not complete to convey with first order delivery system；Completion is once doubled.

Third level delivery system is：Receiving hole 261, quantity is 32, with 16 for one group, one of which and a feeding The second level delivery system completion of component conveys twice；Completion is once doubled.

Fourth stage delivery system is：Receiving hole 261, quantity be 32, with 16 be one group, two groups respectively with a feeding The first order of component, the second level, third level delivery system complete conveying；Completion is once doubled.

Working method：

Step 1：Second cylinder 272 pushes 273 to the second block 275 of horizontal slider, and the 3rd cylinder 274 is displaced downwardly to maximum Position；In the process, vibrating disk 21 continues through conveying guide rail 22 and part is delivered to sub-material passage 231；

Step 2：Part is sent into sub-material mouth by the promotion of upstream part, and part is blown into delivery pipe 24 by air compressor machine air blowing；

Step 3：Cutting plate 233 is started to move by the drive of the first cylinder 235, until adjacent another component of cutting plate 233 Material hole 232 is connected with sub-material passage 231, and second batch part is blown into delivery pipe 24；In the process, the conveying of step 2 Pipe 24 persistently blows afloat part, and passes through stock guide 25, falls into receiving hole 261；

Step 4：After treating that the full stepping of blank dispensing of step 3 enters receiving hole 261, after completing first feeding；3rd Cylinder 274 moves up, the second cylinder 272 bounces back, the 3rd cylinder 274 moves down, most material guide hole 251 and adjacent receiving hole 261 at last Docking；

Step 5：Above-mentioned step two is repeated to step 4, completes second batch feeding；

Step 6：Stock guide 25 moves up, and mould item 26 is entered next group of loading assemblies 2 by the drive of transfer assembly 3, is repeated Step 2 completes the 3rd batch and four batches of feedings to step 5.

With reference to Fig. 9, Figure 10 and Figure 11, transfer assembly 3 includes the conveyer frames 31 being arranged in rack 1, the side of conveyer frames 31 Face is provided with the conduit 311 closed up and down, and the vertical width of conduit 311 is more than the thickness of lug 262, lug 262 and conduit 311 Sliding connection.The upper surface of conveyer frames 31 is provided with multiple pressing plates 39 and briquetting 391,26 stop place of mould item of each station The top of two lugs 262 is respectively provided with there are one pressing plate 39 and briquetting 391；Pressing plate 39 is fixed on conveyer frames 31, and part position In the top of briquetting 391；Precompressed hole 392 is offered on the opposite face of pressing plate 39 and briquetting 391, is provided in precompressed hole 392 Pre-compressed spring 393；The wall surface of briquetting 391 through conduit 311 is abutted with the upper surface of lug 262, to provide certain precompression, Ensure that each station can keep preferable stability when being operated to the part on mould item 26；Briquetting 391 is conveyed along conveyer frames 31 The both sides in direction are both provided with guide surface.

With reference to Figure 12, the lower section of conveyer frames 31 is provided with supporting plate 37 and the upper push cylinder 36 being fixed in rack 1, above pushes away gas The piston rod of cylinder 36 is fixedly connected with supporting plate 37；4 sliding sleeves 371 are fixed on supporting plate 37, slides and wears on each sliding sleeve 371 There is lead 35, the other end of lead 35 is fixedly connected with rack 1.

Horizontal pushing cylinder 34 and multiple transverse sliders 38 are fixed on supporting plate 37, and is provided with twice and is laterally slided with multiple simultaneously The horizontal slide rail 33 of the sliding connection of block 38；Straddle 32 is fixed between twice horizontal slide rail 33, the piston rod of horizontal pushing cylinder 34 is consolidated Surely it is connected to the center of straddle 32.

With reference to Figure 13,33 upper surface of horizontal slide rail is provided with multigroup card slot 332, is clamped on each card slot 332 and is provided with folder Pawl 331, to strengthen fastening, horizontal slide rail 33 is equipped with the fastening bolt being threadedly coupled with clamping jaw 331 with the bottom surface of clamping jaw 331. The top of clamping jaw 331 be with the side wall of mould item 26 and the concave of bottom surface, and the inner wall roof of concave groove is provided with chamfering.

With reference to Fig. 9 and Figure 12, the running of transfer assembly 3 prepares：

Multiple mould items 26 are placed on conveyer frames 31, ensure that there are one mould items 26 for each station tool；Mobile mould item 26 is to right 391 lower section of briquetting of station is answered, the midline position of 26 lug 262 of mould item is just directed at the midline position of briquetting 391；Horizontal pushing cylinder 34 piston rod is contracted to the position of overhang minimum.

The function mode of transfer assembly 3：

Step 1：Upper push cylinder 36 promotes supporting plate 37 to move up, and the grooves hold on clamping jaw 331 on supporting plate 37 is in mould item 26 Side and support in the bottom surface of mould item 26 so that mould item 26 is just off the lower surface of conduit 311；

Step 2：Horizontal pushing cylinder 34 promotes horizontal slide rail 33 to move, it is multiple fall mould item 26 on clamping jaw 331 by band together It is dynamic to be moved along the transmission direction of conveyer frames 31；Mould item 26 enters next station, i.e., next 391 lower section of briquetting when, it is horizontal to push away The piston rod of cylinder 34 also reaches maximum；

Step 3：Upper push cylinder 36 drives supporting plate 37 to be displaced downwardly to minimum point；

Step 4：The piston rod of horizontal pushing cylinder 34 bounces back to minimum value；

Step 5：It repeats the above steps into the conveying of next group.

Claims (9)

1. a kind of efficient feed mechanism for DC plug production line, including rack (1), it is characterized in that：Further include from upstream to Downstream be connected with each other for screening and the vibrating disks (21) of conveying parts (10), multiple conveying guide rails (22), multiple with air pressure The delivery pipe (24) of conveying, stock guide (25) and the mould item (26) for concentrating feed to production line, on the stock guide (25) Multiple material guide holes (251) are provided with, each material guide hole (251) is connected with a delivery pipe (24)；On the mould item (26) Receiving hole (261) is provided with, the receiving hole (261) is several times as much as material guide hole (251), the drive being provided on the rack (1) Stock guide (25) is mobile and material guide hole (251) is aligned to the first delivery device (27) of different receiving holes (261).

2. a kind of efficient feed mechanism for DC plug production line according to claim 1, it is characterized in that：The conveying The material distributing rest (23) that the end of guide rail (22) is provided with is provided on the material distributing rest (23) and is connected with each conveying guide rail (22) Sub-material passage (231), cutting plate (233) is provided on the material distributing rest (23) and promote cutting plate (233) it is mobile first Cylinder (235) is provided with the material-distributing hole (232) of integer times sub-material passage (231) on the cutting plate (233), each described Delivery pipe (24) is connected to the upper opening of a material-distributing hole (232), and the lower part of the material-distributing hole (232) is provided with and air compressor machine The pneumatics connector (236) of connection.

3. a kind of efficient feed mechanism for DC plug production line according to claim 2, it is characterized in that：The sub-material Material-distributing hole (232) on plate (233) is twice of sub-material passage (231)；The end of the material distributing rest (23) is provided with first gear The distance between plate (234), the whole story position that the cutting plate (233) is stopped by first baffle (234) is just two differences The transposition of material-distributing hole (232) and sub-material passage (231) distance.

4. a kind of efficient feed mechanism for DC plug production line according to claim 1, it is characterized in that：Described first Delivery device (27) includes the 3rd cylinder (274) that stock guide (25) is promoted to move up and down and the 3rd cylinder (274) edge is promoted to connect Expect the second cylinder (272) of the direction movement of hole (261) arrangement.

5. a kind of efficient feed mechanism for DC plug production line according to claim 4, it is characterized in that：The rack (1) push frame (271) is provided on, horizontal sliding is connected with the water promoted by the second cylinder (272) on the push frame (271) Smooth block (273)；The horizontal slider (273) is equipped with vertical frame (277) and the second cylinder (272), is set on the vertical frame (277) Put there are two upright slide rail (278), on the upright slide rail (278) sliding be connected with to be driven by the second cylinder (272) and move down Dynamic upright slide block (276), the stock guide (25) are fixedly connected with upright slide block (276).

6. a kind of efficient feed mechanism for DC plug production line according to claim 5, it is characterized in that：The guide The bottom of plate (25) is provided with the locating detent (252) of multiple mould item (26) outer wall cooperations, and the inside of the locating detent (252) is set There is guide surface.

7. a kind of efficient feed mechanism for DC plug production line according to claim 5, it is characterized in that：The push The second block (275) being provided on frame (271), and the whole story position that the horizontal slider (273) is stopped by the second block (275) It is just right for material guide hole (251) and the initial position that receiving hole (261) is docked to next integral multiple hole the distance between to put Spacing between the corresponding aperture connect.

8. a kind of efficient feed mechanism for DC plug production line according to claim 7, it is characterized in that：The rack (1) it is provided with to transport the transfer assembly (3) of mould item (26) on, the feed mechanism includes two respectively positioned at upstream and downstream Loading assemblies (2)；Two loading assemblies (2) include vibrating disk (21), conveying guide rail (22), delivery pipe (24) and stock guide (25)；And the stock guide (25) of two upper loading assemblies (2) is respectively positioned at the both sides arranged along hole of mould item (26).

9. a kind of efficient feed mechanism for DC plug production line according to any one of claims 1 to 8, feature It is：The quantity of the conveying guide rail (22) is 4, and material guide hole (251) is 8, and receiving hole (261) is 32, and material guide hole (251) centre-to-centre spacing is twice of receiving hole (261).