CN203831541U

CN203831541U - Simple obstruction-free vacuum chamber

Info

Publication number: CN203831541U
Application number: CN201420213639.3U
Authority: CN
Inventors: 刘运武
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-04-29
Filing date: 2014-04-29
Publication date: 2014-09-17
Anticipated expiration: 2024-04-29

Abstract

The utility model discloses a simple obstruction-free vacuum chamber and aims to provide a simply structured vacuum chamber with low cost and without obstruction even for long term use. Key points of the technical scheme are that a sealed round coat is added in certain space, which is formed when a certain size is reserved between a cylinder sleeve external edge of an extruder and the vacuum chamber; upper and lower spiral blades or front and back spiral blades are broken; a filter grid plate is added to each broken part; and with the filter grid plate as a border, the back or upper diameter of each spiral blade is small and the front or lower diameter of each spiral blade is large. The simple obstruction-free vacuum chamber works in a way that raw material is pushed forward or downward via the rotating spiral blades; when the raw material passes the filter plate, the raw material gets tightened due to reduction of a cross section of a passageway, so air is prevented; and after passing the filter plate, the raw material moves faster than before, so the raw material cannot be retained and obstruction of the vacuum chamber is avoided.

Description

A kind of simple and easy without stopping up vacuum chamber

Technical field

The utility model relates to vacuum-extruder for the vacuum chamber of extracting air, is more definitely more particularly for the air of raw material being extracted to set a kind of anti-inlet duct by vavuum pump.

Background technology

Extruser for moulding tile blank tire, for mold more tight, current one of effective method is the most by vavuum pump is on-stream, air contained in loose raw material to be extracted, traditional way be prior art as shown in Figure 1 to Figure 3: the reductor 12 being driven by higher level's motor 11 and shaft 3 and be arranged on the stirring blade 4 and higher level's helical blade 24 on shaft, also have two of left and right (only illustrating single in figure) taper sheath 23 and scraper cutter 22 together to turn round, owing to there is certain oblique angle in double stirring blade and axle, double joint shaft (also promising single) each in extroversion and inwardly again in run-in synchronism down, one constantly pushes forward enter raw material tank diameter 10 from hopper 13 for dextrorotation for left-handed one, due to the rear little front ambassador's passage of two of left and right taper sheath 23 from large to small, thereby to being that loose raw material applies extruding and becomes closely originally, stoped thus entering of air, again through scraper cutter 22 closely raw material be divided into fragment and fall into vacuum chamber 14, because the effect of vavuum pump (not shown) is extracted the air in vacuum chamber out from draft tube 16.The reductor 25 being driven by subordinate's motor (not shown) connects and holding pad axle 9 together turns round with the helical blade 2 being arranged on main shaft with the holding pad 6 and the subordinate's main shaft 1 that are arranged on its axle, on-stream the raw material that falls into vacuum chamber is depressed and entered extruder cylinder sleeve 7 by holding pad, by the helical blade 2 in running, constantly it down or is forward pushed, short its surmounts its section and is squeezed into compact base bar much smaller than the machine mouth 8 of back segment cylinder sleeve section, then is sent to next procedure and is divided into the adobe of a piece monolithic or unbaked tile.

After being extracted, air in raw material can make base bar tightr in conjunction with obtaining, be well suited for the raw material that corresponding plasticity is lower, its weak point is: because the tank diameter inwall in running and taper sheath and helical blade are all vulnerable part, particularly taper sheath had both been subject to the friction of raw material in reach, be subject to again in rotation the friction with raw material, once its passage of wear and tear overrun is broadened by narrow, not only feed quantity strengthens, and is difficult to stop that entering of back air makes vacuum chamber ineffective; The corresponding minimizing of its extrusion capacity after simultaneously subordinate's helical blade wearing and tearing, one increases one subtracts and certainly will form raw material and be detained and blocked at vacuum chamber, and because vacuum chamber stops up, full tight makes vavuum pump ineffective to the lighter, and severe one door for vacuum chamber is racked and is forced to shutdown process.There is in addition complex structure and the more high disadvantage of manufacturing cost.

Summary of the invention

The utility model is for overcoming above-mentioned deficiency, aims to provide a kind of simple in structure and a kind of vacuum chamber that long time running can not result in blockage, is achieved by the following technical solutions.

Beyond extruder cylinder sleeve outer rim contour, install one deck and outer wall of cylinder jachet sealing shape spaced apart from each other round jacket additional, by interior be outer wall of cylinder jachet, it is outward the vacuum chamber of space composition between outer casing inner wall, and will be up and down or (vertical dress is for upper and lower in front and back, paperback is front and back) continuously helical blade disconnection, with at gap, install to filter screen, according to material performance and its filtration screen of technological requirement, it can be single track, two pass or more than two pass, when filter grid plate is two pass or multiple tracks, the lower end of its vacuum chamber or front end top surmount the most lower or the most front one filter grid plate installation position.Tackle if desired its machine mouth of extruder because of the too small resistance of section larger, take that to filter screen little front large after when boundary manufactures helical blade while setting up dress up-small and down-big paperback, and stretch in vacuum chamber surmounting the helical blade outer rim initiating terminal top of filtering screen, its objective is that contingency has a small amount of raw material to enter in vacuum chamber and can release in time forward or down, an air intake duct break-through vacuum chamber is installed on the coat and is connected with vavuum pump.

Its acting principle is: owing to filtering the existence of screen, raw material displacement passage is reduced greatly, thereby raw material has been applied to certain resistance, replace thus original concentric reducer taper sheath, raw material is become closely from loose, not only stoped entering of air, and raw material is carried out to round and cut apart and roll, the quantity of filtering screen is set according to material performance and technological requirement, thereby can save higher level, stir operation; Again due to take filter screen its lower or leading portion helical blade be greater than as boundary after or epimere helical blade extrusion capacity increase to some extent, even if do not arrange, do not filter screen and there will not be because raw material is detained yet and stop up vacuum chamber phenomenon.

The beneficial effects of the utility model are summarized as follows:

The one, simple in structure.Owing to there being the existence of single track or two pass or filtration screen more than two pass, between every twice, there is helical blade to be separated by, helical blade role is that raw material is implemented to push, roll and stir, screen role be to raw material cut apart and apply certain resistance make air be difficult to by, thereby can save the mixer that higher level is comprised of accessories such as shaft and tank diameter and stirring blade and taper sheaths, and for driving the spare and accessory parts such as the power of shaft and reductor;

The 2nd, without stopping up.Due to take filter screen as boundary its size of helical blade up and down or before and after claiming with material performance and technological requirement, determine, up and down or front and back size equate or lower large little or pre-large post-small, concrete dimension ratio can not cause and because of delay, stop up vacuum chamber and be as the criterion with raw material, particularly when extruder is that vertical installation is from top to bottom when vertically extruding, because of the effect of gravity with have below its raw material of room and just lose the condition that up enters vacuum chamber, therefore eliminated and be blocked or damage the deficiency of shutting down because of vacuum chamber;

The 3rd, more durable.Owing to filtering screen, be staticly not rotate, and raw material surmounting that middle entrance is less than outlet, coefficient of friction is low.On its vacuum chamber or back plane by screw rod and nut and cylinder sleeve, be connected and fixed, do not need to be provided for picking up the dodge gate repaiied and more durable;

The 4th, in vacuum chamber, be difficult to gas and entered.Its reason be raw material surmount filter screen process in for to pass through from the ringlet shape gap of a plurality of isolation, thereby be extruded tightlyer, although be also difficult to be suctioned through because air starvation forms suction in vacuum chamber, can also select still more the method that strengthens helical blade end and filter the distance between screen to make air buffer thicken to prevent from suctioning through.

Accompanying drawing explanation

Fig. 1 is its appearance structure front view of upper and lower double-stage vacuum extruding machine;

Fig. 2 and Fig. 3 are the internal structures and acting principle schematic of Fig. 1;

Fig. 4 is its internal structure of the vertical installation of the utility model and acting principle schematic;

Fig. 5 is that the utility model flat is installed its internal structure and acting principle exploded view;

Fig. 6 is its vacuum chamber overcoat stereoscopic display figure in Fig. 4;

Fig. 7 is that on filtration screen, plane is top view.

The specific embodiment

Below in conjunction with accompanying drawing, do further description.

With reference to Fig. 4 to Fig. 7, raw material enters along arrow direction from hopper 15, under the effect of the helical blade 2 in rotation, it is pushed toward machine mouth 8 directions, because interlude is that front and back helical blade gap is provided with filtration screen 18, thereby raw material displacement passage section is reduced and form resistance, originally loose raw material is become closely in surmounting filter, not only make thus most of air be excluded, and stopped that not surmounting air contained in the raw material that filters screen enters vacuum chamber 17.Following or its helical blade outer rim initiating terminal 19 of front that filters screen stretches into a small amount of size of vacuum chamber 17, its objective is when contingency has a small amount of raw material to enter vacuum chamber and also can be scraped in time.Its outer putting of vacuum chamber is provided with exhaust tube 16 and is connected with the vavuum pump (not shown) of distant place, vacuum chamber is separated each other outside and forms space and formed with seal form at interior and cylindrical jacket 26 its inwalls by cylindrical cylinder sleeve 7 its outer walls of extruder, outer set upper side (paperback is rear end) top outer rim planar central contour is drilled with a plurality of holes 20, by screw rod and nut 21 break-through through holes and cylinder sleeve 7 and cover plate 27 or hopper 15, is connected and fixed and is combined as an integral body.

Claims

1. simple and easyly without stopping up a vacuum chamber, it is characterized in that installing one deck and cylinder sleeve round jacket spaced apart from each other additional at extruder cylinder sleeve outer rim contour, and will up and down or front and back helical blade disconnects and at gap, filtration screen is installed.

2. according to claim 1 a kind of simple and easy up-small and down-big without stopping up vacuum chamber, it is characterized in that filtering screen while being the vertical dress of its helical blade of boundary, little front large after during paperback.

3. according to claim 1 and 2 a kind of simple and easy without stopping up vacuum chamber, it is characterized in that surmounting filter screen after its helical blade outer rim initiating terminal stretch in vacuum chamber.