Патент USA US2120502код для вставки
June 14, 1938. J. MORTON 2,120,502 MOLD FOR PARTS OF KNITTING MACHINERY Original Filed Jan. 8, 1936 :2:n / 90 1'35 21 2 Sheets-Sheet l ’ June 14, 1938. ‘ J_ MoRfoN ' 2,120,502 MOLD FOR PARTS OF KNITTING MACHINERY ' Original Filve'd Jan. 8, 1936 2 Sheets-"shat 2 ?0 MIN/'1", 272019752107’ Qazzzesw/z’azz / 2,120,502 Patented June 14, 1938 UNITED STATES PATENT OFFICE 2,120,502 MOLD‘ FOR PARTS OF KNITTING MACHINERY James Morton, Tuether, Carlisle, England, as signor to F. N. F. Limited, Oroydon, Surrey, England Original application January 8, 1936, Serial No. 58,176. Divided and this application Septem her 4, 1936, Serial No. 99,494. In Great Brit ain, January 19, 1935 '7 Claims. This invention relates to the manufacture of knitting-machine needle and like assemblies (or so-called “sections”) each consisting of a group of needles or the like secured in a support, such , an assembly constituting a single unit. By the term “needles or the like” is meant knitting nee dles, hooked or otherwise, thread-guides (some times called “pillar-?ngers”), sinkers, and like working parts of knitting machines—_-particu 10 larly those known as “warp knitting machines”. Such needle or like assemblies areusually ar ranged side-by-side along some form of carrying bar (such as a guide bar, needle-bar or a sinker bar) to which the supports are attached, the 15 needles or the like extending in a closely spaced series. The said supports are usually molded of lead or a lead alloy, in which the needles or the like are embedded while the metal is molten but zinc alloys have also been proposed having a spe ci?c gravity as low as 4.6. The supports are re movably attached to the carrying bars to facili tate replacement of any assembly having a broken needle or the like. It has heretofore been con sidered essential to employ metal, or a metallic 25 alloy, for supporting the needles and the like on account of the necessity for securing them rigidly in precise co-relationship and maintain ing such co-relationship throughout their life. A disadvantage associated with the use of me 30 tallic supports is that their weight is a factor requiring to be taken into serious consideration when designing the machines and materially lim its the speed of operation and consequently the output of the machines. Experiments made with (01. 18-42) therein in correct order and co-relationship can be produced, these supports being strong and hard and being capable of retaining their strength and hardness under normal working conditions and being also of such lightness as to enable them 5 to be used effectively in machines designed to run at a high speed. ' The object of the present invention is to pro vide a mold for use in the manufacture of an assembly of knitting-machine working parts. The mold may comprise an outer shell, a part supporting structure which ?ts into said shell and presents an open space, means for locating a group of knitting-machine working parts side by-side with portions thereof extending into said open space, which latter can be ?lled with light weight molding material to surround said por tions, and a closure adapted to ?t into said shell to close said space and ‘press upon said powder. Means provided for locating and maintaining 20 the needles or the like in correct order and @0 relationship preparatory to and during the mold ing operation, may consist of or include accu rately spaced serrations or rack members or a light frame in, or adapted to ?t in, the mold, 25: in which serrations, members, or frame, the nee dles or the like are arranged, the plastic material being supplied in powder form to the mold in terior so as closely to surround the shanks of the needles or the like and, when the material is set, to hold them permanently and securely in posi tion. The said serrations or serrated members may be provided not only externally but also in ternally of the mold. 35 knitting machinery, particularly with Warp knit- ‘ In the preferred construction, the mold is pro ting machinery, embodying various improvements vided with serrations and at least one grouprof directed towards the attainment of speeds of op knitting needles or the like are accurately held eration and outputs materially higher than here in place thereby, molding powder in ?ne condi tofore, have indicated that owing to the consid tion is charged into the mold and closely pressed 40 erable weight of the rapidly moving masses, round the shanks of the needles or the like, then 40 stresses of such magnitude are set up in the ma the mold is closed and placed in a steam or elec chine as to neutralize the bene?t of the improve trically heated press and, ?nally, subjected to ments and prevent the realization of the high such heat and pressure as to convert the powder speeds and outputs forwhich the machinery was into a hard solid body constituting the support 45 designed. which, when removed from the mold, has the 45. In order to overcome the aforesaid disadvan tage, needle and like assemblies having supports group of needles or the like securely-embedded therein ready to be utilized in a knitting machine. made of various materials have been tried and I have now found, after careful selection and trial, are positively held in correct position and rela 50 that by using a light-weight organic molding material, or so-called “plastic” for example a res In use of such a mold the needles or the like inoid material such as “bakelite”, in which the tionship by the serrations of the mold while the 50, molding composition attaches itself to and sup, ports them so that when the molding operation needles or the like are set or embedded by a is ?nished the needles or the like are held very molding operation under heat and pressure, sup 55 ports with the needles or the like positively held securely in place and project regularly and evenly from the support. 65 2 2,120,502 Each support may be molded with two holes light-weight organic molding material” as used herein is intended to cover such moldable resin oi'd substances as the swnthetic resins and com neatly through the thread-guiding eyes ll of each group of thread guides and adapted to seat positions thereof and, in particular, such resins; itself on the external serrations 26 serves to or resinous compositions as are thermo-plastic maintain the heads of said guides in precise alignment. The members 21 and distance-pieces 10 28 co-operate with an upper clamp 3| which holds the heads of the guides securely in place. or otherwise, to its carrying bar or the like. It is to be understood that the expression “a 10 and thermo-setting, for instance, the phenolic resinous material known as “Bakelite”, but it is not con?ned thereto as other well known or ganic substances or compositions which are thermo-plastic and of a speci?c gravity appre 15 ciably less than the aforesaid metallic alloys and which, when molded under heat and pressure Will be strong and set hard and will retain their strength and hardness under normal working 20 ally supported by a plain external rest-face 25 and an external serrated members 21 inserted into bers 2‘! are spaced apart held by a screw 29Ito the permitting it to be removably attached by screws, conditions, can be used. Of course as required for strength and light ness suitable lightweight ?llers would be chosen for the molding compositions, a variety of such ?llers. being obtainable. The invention will now be described simply by 26 way of example and with reference to the ac companying drawings, as applied to needles and like working parts of warp knitting machines. On the drawings: Fig. 1 is an elevation of an assembly compris 30? ing a group of thread-guides and. their Bakelite support. Fig. 2isa sectionon the line. ll-—H of Fig. 1. Fig. 8. is a plan of a mold with parts thereof removed to expose thread-guides embedded in 3517 “Bakelite”, and Fig. 4 is a corresponding sectional fragmentary. plan drawn to an enlarged scale. Fig. 5 is a section on the line V--V of Fig. 3, Fig. 5 being drawn to a larger scale than Fig. 3. Fig. 6. is a diagrammatic perspective View, 40; drawn to an enlarged, scale, showing how the thread-guides are locatedin the mold. Figs. 7, 8, 9, and were sectional perspective views of assemblies comprising groups of latch knitting-needles, sinkers, plush-needles (i. e. pile forming needles) and bearded knitting-needles, respectively, and their “Bakelite” supports. rest 26 on each of two the die 2|. The mem by a distance-piece 28 die 2|. A pin 30 ?tted Theserrations are accurately made so as to ensure that the needles or the like shall be held in correct relationship during the molding opera 15 tion. In the use of the mold, the lower die 2| with the members 2'! and distance-piece 28 thereon are ?tted into the shell 20. The thread-guides H) are arranged in two groups, with the pins 30 20 threaded through the eyes ll of the guides of the respective groups, the guides being accurately‘ disposed between and laterally. supported by the serrations 24 and 2B and also supported by the faces 25. The “Bakelite” composition consisting 25 of. the required mixture of synthetic resin and suitable ?ller in ?nely. powdered form is care fully packed upon both sides of the die, the thread-guides l0 thus becoming embedded inthe powder. The dies 22: and the clamp 3| are placed in position. The completely assembled mold is put into a known form of molding press, and pressure and heat are applied'so as to convert the composition into a Bakelite body of the required hardness. After the “Bakelite” composition has been subjected to the required.“cooking”, the mold is removed from the molding press and disman-v tled and the pins 23 are withdrawn from the thread-guides, whereupon the newly formed “Bakelite” supports l3, with the stems l2 of the 40 thread-guides» securely and permanently em bedded therein, are removed. number of sid-e-by-side guide-holding supports The provision of the serrations 24 results in the formation of an open slot 32 in each support I3, said slot- exposing a short portion of’each stem I2. The effect however of this slot is negligible as regards the security and rigidity with which the thread-guides are held in place. If desired, serrations similar to the serrations 50' 241might also be provided in the faces 25. If desired, a series of double molds, each simi lar to the mold proper above described, may be provided so that several assemblies may be pro duced at one molding operation. If desired,- instead of forming serrations in 55. tegral with the elements of the mold as in the construction illustrated, light frame members in which the thread-guides are located may be in serted-into the mold and embedded along with the similar to the support l3 would be likewise at‘ thread-guides in the Bakelite. Referring to Figs. land 2, the assembly therein shown- consists of a group of thread-guides l0 each formed with a thread-guiding eye or hole 50 H‘ and each including a stem 12, the guidesbeing arranged side-by-sid-e and being’ precisely equi spaced. The support consists of a thin block l3 of‘ “Bakelite” from one side of which the guides Hi all project to the same extent. The support I3 551 is formedwith a shoulder 14 and ?ange l5 hav ing screw holes 16 and is- thereby adapted for removable attachment in the usual manner to a guide-bar’ (not shown in this view)v to which a tached. ' In Figs. 3 to 6 a suitable form of mold has been shown which is adapted to mold at‘ one ' 602 If desired, reinforcing'material may be incor porated in the “Bakelite” support. For example, such reinforcing material may comprise a strip operation “Bakelite” supports for two separate of fabric or a thin metallic or other rod-if de groups of thread-guides ill. The mold structure includes an outer shell 20; into which the mold' proper ?ts. ,The chief elements constituting-the‘ sired, serrated-arranged across the shanks and in- engagement therewith. mold proper are a lower die 2! and duplicate up ing type, containing, for instance, wood ?our as the ?ller, can be advantageously employed, al though other ?llers, such as asbestos ?bre or‘ 70. per dies 22, these‘elements being separable. Core‘ 70i pins 23' driven tightly into holes in the lower die: 24 andregistrable with holes in the upper diesn22- serve to form the screw-holes IS. The thread-guides‘ ID are spaced apart by series’ of; internal serrations 24- provided at both sides .of the die 2|. The thread-guides are- addition “Bakelite” molding powders of the quick-?ow ?aked fabric can be used. With reference to Figs. 7, 8 and 9, the working parts there-in‘ shown may be incorporated in the same warp-‘knitting machine to work in combina-" tion- with the‘ thread-guides; 2,120,502 Fig. 7 shows members of a group of latch knit ting-needles 40 whose shanks 4| are securely em bedded in a “Bakelite” support 42 removably at tachable to aneedle-bar (notshown in this view) to which other similar supports would also be attached side-by-side. - Fig. 8 shows members of a group of sinkers 50 which in the construction shown are embedded at opposite ends in a main “Bakelite” support 5| and an auxiliary “Bakelite” support 52. This auxiliary support may, if desired, be dispensed with. These sinkers 59 pass between the knit ting needles to control the loops formed in the threads being knitted and hold down the fabric 15 in the usual manner. The main Bakelite support 5| is removably attachable, side-by-side with other similar supports, to a sinker-bar (not shown). Fig. 9 shows members of a group of plush nee~ 20. dles 60. -Such needles can be provided in warp knitting machines adapted to form. pile loops in the fabrics knitted by them, these pile loops ex-v tending from the knitted chains produced by the individual knitting needles. The stems 6| of 25 these plush-needles are embedded in .a “Bakelite” support 82 securable to a plush-bar (not shown) corresponding to the needle-bar 43. Referring to Fig. 10, the knitting-needles 10 therein shown are bearded needles. Such needles 30 constitute a well known alternative to the latch needles shown in Fig. 7. The working parts above described with ref erence to Figs. 7 to 10 are all assembled as groups in their “Bakelite” supports in substantially the 35 same manner as already described with reference to Figs. 1 to 6, the molds employed being modi ?ed in so far as necessary to suit the dimensional and other differences between the different parts. In the case of the knitting needles 4!] and ‘Ill, a 40 positioning pin corresponding to the pin 30 can be threaded through the hooks 40a and ‘Mia of each group of needles; and in the case of the sinkers 50, a positioning pin may be placed in the recesses 51!21 in the sinkers of each group. The invention is suitable for application to the 45 manufacture of needle and like assemblies includ ing groups of needles and the like of standard form, as heretofore used in knitting machines; but, if desired, the shanks of the needles or the 50 like may be formed with overturned end projec tions which would help to lock the shanks in the plastic composition. As an example of a suitable light Weight mate rial the phenolic resinous material (trade name 55 “Bakelite”) has been specially referred to but other examples may, however, be given; for in stance, cellulose derivatives such as cellulose ace tate and rubber derivatives such as ebonite. Bakelite powder incorporating a light weight 60 ?ller as aforesaid has a substantially lower spe ci?c gravity than the metallic alloys before men tioned and it has been found a most suitable material for the needle and the like assemblies; but other light weight materials such as above 65 mentioned have also been found to give good re sults. This application is a division of my col-pending application Serial No. 58,176, ?led January 8, 1936. 70 3 side with the recesses thereof in alignment and with portions thereof extending into said open space, which latter can be packed with lightweight plastic material in powder form to surround said portions, said locating means including serrations provided on said structure externally of the open space, seatings in said serrations, a rigid position ingmember adapted for threading through said recesses and to rest in said seatings, and a closure adapted to fit into said shell to close said space 10 and press upon said powder. 2. A mold for use in the manufacture of .an assembly of knitting-machine working parts con sisting of head portions and stem portions, said mold comprising an outer shell, a part-support ing structure which ?ts into said shell and pre 15 sents an open space, means for locating a group of said working parts side-by-side with the stem portions thereof extending into said open spade, and with the head‘ portions external to said 20 space, which latter can be packed with light weight plastic material in powder form to sur round said stem portions, said locating means in cluding serrations on said part-supporting struc ture and a clamp to hold the head portions se 25 curely in said serrations, and a closure adapted to ?t alongside of said clamp into said shell to close . said space and press upon said powder. 3. A mold for use in the manufacture of an assembly of knitting-machine working parts con 30 sisting of head portions and stem portions, said mold comprising an outer shell, a part-supporting structure which ?ts into said shell and presents an open space, means for locating a group of said working parts side-by-side with the stem portions 35 thereof extending into said open space, and with the head portions external to said space, whichv latter is adapted to receive an organic molding material to surround said stem portions, said 10 eating means comprising rigid spacers on said 40 part-supporting structure internally of said open space to support the stem portions, rigid spacers on said structure externally of said open space to support the head portions and a clamp to hold the head portions securely in said spacers and 45 a closure .adapted to ?t alongside of said clamp into said shell to close said space and press upon said material. 4. A mold for use in the manufacture of an assembly of knitting-machine working parts con 50 sisting of head portions and stem portions, said mold comprising a part-supporting structure presenting an open space, rigid means for locat ing a group of said working parts in precise side-by-side co-relationship, with the stem por 55 tions thereof extending into said open space, and with the head portions external to said space, which latter is adapted to receive an organic molding material to surround said stem portions, said locating means comprising rigid spacers on 60 said part-supporting structure internally of said open space to support the stem portions, rigid spacers on said structure externally of said open space to support the head portions and a clamp to hold the head portions securely in said ex 65 ternal spacers, and closure means to close said space and press upon said material. 5. A mold for use in the manufacture of an assembly of knitting-machine working parts each assembly of knitting-machine working parts con sisting of head portions and stem portions, said 70 mold comprising a part-supporting structure having a recess, said mold comprising an outer presenting an open space, rigid means for locat I claim:— 1. A mold for use in the manufacture of an shell, a part-supporting structure which ?ts into ing a group of said working parts spaced apart said shell and presents an open space, means for in precise side-by-side co-relationship, with the 75 locating a group of said working parts side-by- * stem portions thereof extending into said open 75 2,120,502 space and with the head portions external to said space, which latter is adapted to receive an organic molding material to surround said stem portions, said rigid locating means com prising serrated spacers on said part-supporting structure to support the stem portions, said spac ers projecting into the interior of the open space so as to be embedded along with the stem por tions in the molding material, and serrated spac for threading through said recesses and to rest in said seatings, and closure means to close said space and press upon said material. 7. A mold for use in the manufacture of an assembly of knitting-machine working parts said material. 6. A mold for use in the manufacture of an each comprising a stem and a portion with a recess, said mold comprising a part-supporting structure presenting an open space, rigid means for locating a group of said working parts in precise side-by-side co-relationship, with the re 10 cesses thereof in alignment and with the recessed portions thereof extending into said open space, which latter is adapted to receive an organic molding material to surround said portions, said assembly of knitting-machine working parts each locating means comprising serrations provided 18 1.0 ers on said structure externally of said open space to support the head portions, and a clo sure means to close said space and press upon having a recess, said mold comprising a part supporting structure presenting an open space, rigid means externally of said space for locating a ‘group of said working parts in precise side ~ by-side co-relationship, with the recesses there of in alignment and with portions thereof ex tending into said open space, which latter is adapted to receive an organic molding material to surround said portions, seatings in said locat \ ing means, a rigid positioning member adapted on said structure internally of the open space to receive the stems of the group of said work ing part and serrations provided on said struc ture externally of the open space to receive the recessed portions, seatings in the last-mentioned serrations, a rigid positioning member adapted for threading through said recesses and to rest in said seatings, and closure means to close said space and press upon said material. JAMES MORTON.