DE2546517A1 - ONE-PIECE CAST-SHAPED FILTER AND METHOD AND DEVICE FOR ITS MANUFACTURING - Google Patents

Description

£ lnstUeleii tee λ ■ tea η older and γ · led as well ir au «one ufifff for e Yorri

The invention beaivht «live i« «11 <· Μ · 1η · η on« in one piece ··
guss ^ eforMt ·· Ströaunc »Kitt« lfilt * r and · 1η · fore construction
Kur U «rst« llung d «*» «lb« n · In «b« «ond« riont «t« ioh di · £ rfin «
aung on a> pritzc «i» «« * n ·· StröMunc »Bitt« ll «itunc» filt »r from
relatively small size

Before this problem became known, S tröMuncaait shared tune filters and filters different types of structures. In one case, such a filter is used in one case
hydraulic system suw filter de hydraulic struaung
Kittel at »elnea flow through the system» One of the known and used functions consists of a »nylon sieve» which «

609818/0780 - * -

generally planar or flat, and then in «in · cylindrical Shape is wound up · Da · cylindrical nylon screen is then in an insert form of the unfamiliar shape, and it are reinforcements or end fittings made of plastic shaped. One of the disadvantages «of the known filter designs is because the nylon screen is extremely fragile and Difficult to handle «Secondary molding processes are relative expensive and entail numerous difficulties "

Another general difficulty is with molds relatively small, complex shapes required to form the fine screen for the filter. Very often the cross-sections of the phono are too small to be filled with resin and therefore voids remain in the filter. This creates a lot of scrap in manufacturing processes the tools themselves for forming a mold of complex shape are very costly and time consuming.

Another difficulty with the known filters is that they are generally made up of flat, sieve-like ribbons · Solid particles therefore tend to completely block the filter against fluid flow to clog "Also arises as a result of the shape of the fluid lines provided before this invention became known filter a turbulent fluid flow through the filter, which increases the flow resistance of the fluid pipeline »

It is therefore the task of the invention to develop a new and different

009818/0780

INSPECTED

9.546517

improves · «fluid filter« u sharp, that from injection molding · material and injection molding process with a high MaO Reliability and performance can be established

A special feature of the invention consists in the creation of a new and improved fore for the formation of flow * - alttolfiltern, which required the shaping of a filter screen complicated shape by means of a forra cavity and an a * satxkernelements enables

Another advantage of the invention is the creation of a flow fluid filter, which solid particles in a accumulates in such a way "that the filter openings are not clogged or blocked"

The fluid filter according to the invention also reduces the turbulent Strömungsmittelf iuo and executes a flow ·· mlttelfIuQ induce _v of a more Lamlnarstrttmung like, in order to decrease the Strömungsmittelleltungswiderstand.

Course, includes the Ferm construction according to the invention first and long main sections of a line at a distance annular rings formed from each other in it · A core body is inserted into the mold, which is a number of long narrower ones Has grooves · These grooves are arranged so that they are parallel to the center line of the core so that they are at right angles BU the number of annular grooves formed in the molding · The grooves form a number axially and radially outwards

6Π9818 / 0780. _k .

aligned teeth that hit the web sections between the ring-shaped grooves of the shaped body in contact The number of points of contact between the teeth of the core and the steep sections of the shaped body forms a number of small holes through which the fluid can flow Each one of the number of holes formed in the filter is clay in a tiny rectangular shape and arranged in a circular pattern over the meshed filter body. One of the advantages of the fore construction according to the invention is that the long grooves formed in the core are free Durchfluflveg for dae Spritsgußhars form * Since the grooves Kit engest distance üb the periphery of the moldings · around slnd disposed ₉ can be the annular rings formed in the core body more easily fill · the longitudinally extending, internal ribs of the Filter are tapered in the longitudinal direction, including a uniform Create the load deflection curve for the filter on the Yerkseuge, this taper enables a uniform opening size for conical filters since the conical core surface la circumferential cross-section fluctuates · This also creates a natural pull for the core to eject the shaped filter from it ·

Approximately in the longitudinal center of the filter there is a wide ring-shaped Band provided to allow the molding material to be filled in in the middle. This broad ring-shaped band acts as a Artery sum directing the injected Harses from one side of the mold to the other and from there on the outer ribs en ti and Da Injection molded hars are then made into the smaller sized annular

Ribbons pressed in alignment on the dividing line · the dividing line

609818/0780

- 3 -

acts as a «« in a venting device for pushing out air and gasses from inside the mold to ensure that the entire mold cavity is filled. If a multiple fill If the shape is desired, then multiple annular bands can be provided in the mold construction. By forming a For "of such a shape" in which the dividing line passes through a central portion of the annular rings " improved venting of the mold is achieved, and the injected resin can more easily penetrate the entire space inside the mold Flow into the mold cavity

From the following detailed description in Connections! T Numerous other features and advantages of the invention are apparent from the accompanying drawings same reference numerals within In the various figures in the drawings, the same elements and components are identified

Fig. 1 shows an interference line filter according to the invention in fig

a fluid line shown in cross section,

FIG. 2 is a side view of the filter shown in FIG rotated about its longitudinal axis,

3 shows an enlarged section along line 3-3 of FIG. 2, FIG. K shows a section along line kk of FIG. 3,

Fig. 5 is an enlarged top plan view of a main mold portion showing the core in position to form the core Fluid filter according to the invention,

609818/0780. 6 -

6 shows a section along the line 6-6 of FIG. 5, and Flg. 7 »in an enlarged partial perspective view of the outer one

Peripheral wall a «filter manufactured according to the invention, when showing the filters received with the filter element » effect·

Referring now to FIGS. 1, 2, 3 and k, a fluid line filter constructed in accordance with the principles of the invention is shown, which is generally seen by the addition screen 10. The fluid line filter 10 contains a view! small annular rings 12. The annular rings 12 are equal · idle kept substantially uniform cross-section and the longitudinal axis of de · Filter body · spaced · Zn center de · Filter body 1st a wide ring 14 disposed · Dmr Außendurohmeseer the wide ring ik smaller than the inside diameter of the fluid line or the fitting 36 which is to receive the fluid filter 10

On the opposite sides of the filter are in the longitudinal direction running outer ribs 16 "and 18 formed" those with the "widths Ring i4 work together to give the filter construction an The broad ring 14 and the longitudinal outer ribs 16 and 16 give sufficient strength and rigidity 18 are the result of a new form construction, which enables the ousshara to flow through the form to a form a uniform filter construction see below

609818/0780

In the embodiment disclosed here, the filter has a closed head portion 20 'which is provided with a number of spaced apart lugs 21, 22, 23 and Zk which are preferably arranged in a square so that the conduit 36 is engaged However, it should be pointed out that the tilter according to the invention can, if necessary, also be designed without these approaches. A tab Z6 extends from the head 20, on which a number of teeth 27 is formed, as can be seen best from FIG.

On the end opposite the head 20 is a hollow base plate section 28 is formed, which delimits a filter outlet opening and preferably has a diameter such that it alters the «inside ··

the diameter of the fluid line or of the / fluid « Filter-accommodating fittings forms a tight fit · An O-ring 29ft can be arranged in a recess 29 of the base plate 28 as best seen in Fig. 1 ·

A number of lengthways, arched at a distance held, inner hips 30 are designed so "that they a" lumpy connections BdLt the small annular ring 12 and have the wide annular ring 14 and with opposite Ends connected to the head 20 and the base plate 28 · The inner sides or longitudinal edges of the inner ribs 30 lie

609818/0780

to · 1η · Βΐ uniform diameter over their overall length · from the base plate 28 to the head 20 away. The ring-shaped rings 12 cooperate with the longitudinal inner ribs 30 to form rectangular openings Jk , as best seen in FIG dad dl · ribs a frusto · fttrmlgen have triangular cross-section as shown in FIG · k geselgt · This construction, in conjunction with the taper of the ribs in the longitudinal direction and the progressive RUekschneidung the rings 12 of uniform cross-section equipped in diameter di · opening "n Jk within the entire filter construction with essentially the same OrBAe and shape made from *

In use, the flow control filter 10 is intended for use in a channel carrying fluid or "in the chamber of various installations" Provided with a slightly widened bid · 38, that · widened with a threaded coupling nut to enable the line to be attached to a full line or a connector in a fluid line Snd · 38 forms «in · shoulder on the interaction with the approaches sen 21 to Zk and on storage of the ·· filter ··

In the illustrated A «« fahrmmg «f« rM is 41 · »trgMwngSM11flflms-

609818/0780

direction from head section 20 to base plate section 28 thought · The fluid flows through the rectangular openings into the interior of the filter element · The number Ribs 30 have the tendency to reduce the turbulent flow of the flows by means of the openings through / into a fluid. to convert flow, which is more like a laminar flow

VIe best from Flg. 7, the particles to be filtered have the tendency to bridge the smaller ring-shaped rings 12, as indicated by the "particles" denoted by the reference character kk protruding from the openings 3k , the fluid flowing in the vicinity of the ⁴ particles kk can still flow around the particles and through the immediately adjacent opening 3 ^ a of the fluid, while minimizing the actual blockage of the openings of the filter

Referring now to Figures 5 and 6 , there is shown in detail the construction of a mold body and core for making the fluid line filter described above The main mold sections 52 and 53 have mating and abutting surfaces $ k and 56, but the fit between the surfaces is not airtight, which means

609818/0780 .10-

a valve for air and oasis on the entire dividing line of the Shape is provided along · Üiee valve is of semicircular Uin ^ Bildungsauenehmwngen 58 and 59 crossed to the Ventilate each recess asu favor and «in filling the · same with plastic material during a molding process «· deliver ·

The semicircular recesses 58 and 59 are arranged at substantially uniform intervals along the longitudinal axis of the main mold sections 52 and 53 to form the rings 12, as stated above. The semicircular recesses 58 and 59 form annular recesses of substantially the same cross-sectional area A large recess 60 is formed over the length of the shaped body in the main section 52, which is flush with a similarly shaped large recess in the main section 53. A longitudinal channel 6Z is formed in the shaped body 52, which extends over the entire length of the same · Similarly in the main mold from section 53 a longitudinally extending channel 63 is formed which extends substantially over the entire length of the same · A cavity section 6k forms the head of the mold and contains a curved end wall 66, which leads into a recess 67 which is part of the channel 62 The cavity 6h contains recesses 68 and 69 for forming lugs in the plane of the separating surface 54, as well as a cavity 70 for forming a lug in the rear section of the head cavity part 6k, a similarly designed cavity for forming a lug is in the back of the

609818/0780

- 11 -

Head section of the main forum section 53. These hollow space sections form the projections 21, 22, 23 and 2k of the filter unit 10 of FIGS Approach · can also come in failure «

At the lower end of the main section 52 is a recess 72 intended to form a base plate. Section 73 of reduced diameter leads into a section of enlarged diameter and thereby creates a means to form the annular groove 29 of the filter 10 «Die Aus» recess 72 for forming the base plate and dl · ring-shaped Recesses 7 ^ are preferably essentially the same Diameter and form a tight fit for the base plate 28 of the filter with the line 36

Between the main mold sections 52 and 53 is "located in the core body 76" The core body 76 has "end plate 75 which seals the end of the mold cavity". A number of axially and radially outwardly directed teeth 77 are formed on the core J6 The middle hub section 78 of the core body 76 is essentially of uniform diameter over the entire length of the grain "J" but the outer edges or the circumference surfaces of the teeth 77 are tapered in the longitudinal direction Can best be seen in FIG. The web section between the grooves 56 in the shaped body are evenly tapered "with diameters decreasing from the bottom of the shaped body to the top part d of the shaped body." The web sections essentially have ""

609818/0780

- 12 -

the same diameter as the outer circumferential edges of the tooth 77 »* o that they · come into contact · Furthermore, point out the surfaces of the teeth have an arched formation that matches the circular web surfaces. Vo the segments of the Surfaces of the teeth 77 the complementary formed upper surface elements of the webs between the grooves 56 touch and mate with them will be the holes 34 in the filter It is to be noted that each tooth has opposing sausages parallel to each other "in order to form the above-mentioned converging sausages 30a and 30b on the ribs 30 ·

In the main mold portion 52 is a resin inlet port , generally referred to as inlet 80, and provides a means for admitting the mold resin into the mold cavity during the injection molding of the in FIGS shown failure means

During the molding process, casting resin is pressed through the inlet 80 in the area of the wide annular recess 60. The Oußhars flows in the LMngskanal 62 of the main mold sections 52 along and around the wide annular recess 60 which acts as an artery. The resin also flows into the longitudinal canal 63 towards the head and base plate sections of the cavity · The resin flows from the longitudinal channels 62 and 63 through the semicircular recesses 53 and 59 and in the direction of the abutting surfaces 54 and 56 to “When molding resin is pressed through the space of the cavity, air trapped in the cavity is passed through the small space between the adjoining ones

609818/0780

- 13 -

Surfaces 5 ^ and 56 printed through. Hence it becomes a cavity of the complicated shape, like eie for the formation of the flow - eittelleitunöSfiltors ^ as theeor noise charge is required, completely filled without air spaces in the finished casting would be formed

Pie above description includes a novel and powerful ..; trömungsraittelleitunii »filter and a cavity for the formation of it there is a single special embodiment here the invention has been disclosed, it should be noted that deviations and modifications have been made can be without deviating from the thoughts and scope of the following To deviate from the claims of the inventive concept laid down *

0 9 818/0780

Claims (1)

\ η s ρ r it e h θ ι / 1, ptröutiui ^ suiittoirilter «gokennzeieunet through a base plate section with oinora leading through there through the dexi otröiomittelkanal, an axially uta a predetermined spacing from the base plate, a number with an axial distance from each other between the deta ürundplattabonabschnitt and dominal plate section aii ^ ooränutor ria ^ rormi ^ er rings, as well as a / aiz & hl arched at a distance from each other, axially extending! lips between the head and tilting section, which are integrally connected with the annular rings, the tilting and the ring-shaped measuring Rings protrude radially opposite one another from a connection and work together to form a number of openings in the reddening agent filter ¹ . 2 «fluid filter according to claim 1, characterized in that that the number of axially spaced, ring * shaped rings protrude radially outward from the connections and cut from the base plate hub to the head section decrease in the jXtrchmesser, and that the number of hips from the Connections protrude radially inward and at their outer edges are tapered to match the decreasing diameter of the ring-shaped hinge, creating a flow · «· middle! filter of essentially conical shape to form. 3 fluid filter according to claim 2, characterized in that 609818/0780 - 15 - that the number of axially and radially inwardly directed ribs with their inner edges on a corrugated scale common radius ends between the base plate section and the head section is 4, flow device according to claim 1, characterized in that » that it also contains terichtoto approaches radially outwards, which are formed on the head portion and a storage for form the filter when it enters the fluid center line is used " 5 · currents! Ttelfilter h _t according to claim characterized by means lobes which extend radially from the head portion outwardly and "liters constitute means for detecting the fluid! For insertion into the Strömungsmittelloitung and for removing therefrom" 6, flow oil filter according to claim 1, characterized in » that the base plate section contains an annular groove » an O-ring to form a seal between the « Base plate portion and an inner wall surface of the fluid conduit receiving the fluid flow filter records 7 · Fluid filter according to claim 2, characterized by radially outwardly projecting and axially extending ribs formed on the outer portion of the annular rings and extend from the base plate section to the head section 609818/0780 - 16 - extend to reinforcement means for the annular Form rings EU. 8, fluid medium filter according to claim 7 »characterized by an annular main ring, which is between the base plates » section and the head section is arranged, the last « said ribs overlaps and has a larger cross-section than any of the number of spaced apart held and outwardly directed annular lung 9 fluid filter according to claim 2, characterized in that the rings have a substantially uniform cross section and are held substantially uniformly apart from one another and the ribs in the direction of the head portion · tapered peripheral edge and inwardly converging side surfaces _f have the openings with to provide essentially the same greetings and shape 10 «Form for the formation of a fluid filter, marked through first and wide main sections old to one another abutting surfaces in order to form a dividing line and a ventilation device for the mold, these first and «wide main sections a number of axially spaced, aligned and costly have complementary semicircular recesses, "between which web sections are formed, as well as a channel in each of the first and «wide main * - 17 - 609818/0780 sections «which extend axially to the semicircular Au extends and a canal anua lAirchfluss des Formmateriala into it and out of it into the Number of semicircular recesses in the direction of the dividing line forms "a core body" between disposed on the first and second main portions and having a number of axially and radially outwardly directed teeth has «their outer circumferential edges with the web sections are in contact, as well as pouring devices in one of the Main sections for admitting the fors material into the channels and from there into the annular recesses for formation a fluid filter 11 · Mold for forming a flow rate filter according to claim 10 "characterized" that the first and second main sections have an annular main recess is formed in the middle of the same and intersects the canals and has a larger cross-section than any of the number of axially spaced annular openings nehiaungen "and which the inlet opening overlaps" to form " take material from her and deliver it to the sewers 12 · For »for forming a fluid filter according to claim 10 «characterized by an axially extending cavity section at one end of the first and wide main section to form a head for the fluid filter 13 «Fora sur formation of a fluid filter according to claim 9« 809818/0780 - ie - marked by radially near outwardly directed hollow rough »« absohnltte, di · an «in ·« End · dar ar · tan and aval tan main · Sections are formed to form storage means on the flow medium filter, see below. 14, .For »the formation of a flow medium filter according to claim 9» tTokannaaiohnat by circular recesses on the formation elnar Orundplatta for daa fluid filter, one eye · » hobanan Abachnltt ransend to the dl · base area ringföralcan Auanahnuneon »um alna rincftfrMlga groove in dar Grundfora sur Aufnahwe ainaa DiohtuncsalaManta su form · 15 · Procedure boo fon & pouring objects in a fonakon « struktion With first and second main sections, the surfaces abutting one another to form a dividing line and cavity sections formed in a coaxial manner Inclusion of Gusshars exhibit »marked by the the following step: embedding casthars into the cavity * absehnitte "so that the river of the Harses in the direction of dl" Separation line su takes place, ventilate the cavity sections at the dividing line sub complete filling of the cavity · »sections with cast iron and thus the formation of a counter * Stand free of cavities, as well as removing the object from its position «wipe the first and second main sections · 16. The method of molding objects according to claim 15 » - 19 - 6098 18/0780 characterized by the further step of steering the » Cast resin from the cavity section within the "advise Main section to the cavity section near the wide one Main section, with the Qusshars within the hollow roughness sections essentially simultaneously in the direction of the Dividing line is directed 609818/0 7 80 ι *> L e rs e i te