CN1080674A - Sewing needles and manufacture method thereof - Google Patents
Sewing needles and manufacture method thereof Download PDFInfo
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- CN1080674A CN1080674A CN 92105265 CN92105265A CN1080674A CN 1080674 A CN1080674 A CN 1080674A CN 92105265 CN92105265 CN 92105265 CN 92105265 A CN92105265 A CN 92105265A CN 1080674 A CN1080674 A CN 1080674A
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Abstract
The method that mat carries out whole shafts mold pressing does not produce any burr and makes a kind of Sewing needles at its shaft.Pin base 10 bears two-sided roll extrusion result and forms rod body section (14,16).Then, before pinprick, forming a lengthening section on the pin base for constituting the usefulness of clearance above the pinprick subsequently.Mold pressing makes the angle that two side surfaces of long ditch (28) are separated from each other and Zhang Chengyi is predetermined, and makes pinprick top clearance (40) and eyelet portion (33) moulding.The Sewing needles of making like this has enough rigidity and proved that the space between shaft and suture has increased, and the result has realized stable sewing operation under the situation that speed increases.
Description
The present invention relates to a kind of Sewing needles and manufacture method thereof.
Sewing needles is with mold pressing processing routinely or touches and be pressed into shape, rotary pressing processing or a class pressure processing method similarly and make, with the substituted metal machining.Yet, this kind people known pressure processing method need a series of punch process, grinding and attrition process, it causes essential a collection of dissimilar pressing mold and the trouble extremely used.
Conventional press-working method causes burr owing to adopt pressing mold on the shaft of pin.Unfortunate, removing burr is again the work of wasting time and energy, and therefore, rotary pressing processing or roll extrusion allegedly can prevent the generation of burr on the shaft when eedle is shaped, and the method as No. 4044814 patents of the U.S. disclose is suggested recently.
But, for metal stock being made the shaft of Sewing needles and prevent to form burr on shaft with rolling process, the volume that importantly is subjected to roll extrusion to clamp-on the metal stock in the hole, formed outer end between one pair of mould is compared and will be reduced to some extent with the volume in hole, thereby the too many or shaft when the blank short weight is because compacting when causing burr to form slit, the intensity of pin reduces, increase loss owing to scraping the similar trouble of scrape along in the mill, caused manufacturing cost to increase.
In addition, the clearance of the pinprick of degree of depth deficiency top is presented to pin when line on the shaft has the circle that often makes suture when stretching and broken into undersized slightly, causes the looper device to grab and does not live coil.So, Sewing needles will as adjusting Sewing machines, comprise regularly and adjusting through the operation of trouble on Sewing machines by dress, the adjustment of parts such as feeding pallet, so that the jiggering of Sewing machines and operation all need more time and labour.
Consider above-mentioned all shortcomings of prior art and make the present invention.
Correspondingly, target of the present invention is to provide a kind of high-quality utilization performance that fractures that has enough bending strengths and avoid pin greatly for Sewing needles.
Another target of the present invention is can guarantee that for Sewing needles provides a kind of space big between suture and shaft is beneficial to the ability of sewing work and permission Sewing machines high-speed cruising.
The further target of the present invention provides a kind of manufacture method of Sewing needles, the stable sewing operation in the time of adopting ready-made cheap fabrication process to have sufficient intensity and guarantee high speed.
According to an aspect of the present invention, a kind of method of making Sewing needles is provided, this pin comprises a shank, and from then on shank extends the shaft form and at the formed needle point of shaft far-end, the continuous long ditch that on shaft, has groove shape, this ditch extends to shaft in the needle point vicinity from shank always, makes a pinprick along Chang Gou, and shaft is made and had pinprick top clearance.The operation that method comprised is: the shaping of pin base, it has cylindrical major diameter shank, form the diameter first section shaft slightly littler by the continuity of shank far-end than shank, reach by first section shaft far-end continuity and form diameter, first section shaft and second section synthetic full shaft of shaft than first section second section shaft that shaft is slightly little; The second section shaft that forms, it has the corresponding lengthening section of pinprick top clearance with sewing needle; Shaft is carried out mold pressing forming by the spill Chang Gou of shank till needle point vicinity on second section shaft and the pinprick of establishing along ditch continuously with the thin muscle sheet that holds pinprick, and with the lengthening section distortion to form pinprick top clearance.After the shaft deformation processing, the above-mentioned inner surface of the long ditch of shaft opens with predefined angle.
Like this, in the method for the invention, second section shaft is by doing shaping with the corresponding lengthening section of Sewing machines pinprick top clearance that processes at last in advance with mold pressing, so pinprick top clearance can reach enough degree of depth.Therefore, method of the present invention can be made and have enough rigidity and high-quality Sewing needles.
According to a further aspect in the invention, Sewing needles includes large diameter cylindrical shank, extend shaft that forms and the needle point that forms at the shaft far-end from shank, has the long ditch of spill on the shaft, it extends near certain part on the shaft needle point from shank, be provided with pinprick along long ditch, shaft then has the clearance of pinprick top.Shaft is separated two truncated cone sections that shape is being provided with by being mutually on the shaft and is divided into first section shaft and second section shaft, is provided with pinprick on this second section shaft.Be provided with necking segment along second section shaft and in the pinprick vicinity of second section shaft continuously, second section shaft of the sectional area ratio of formation is little.The pinprick top clearance of making on the necking segment is positioned at an opposite side of long ditch.The inner surface of shaft opens with predefined angle and constitutes long ditch.Necking segment, pinprick top clearance and inner surface are all suppressed and are formed.
Like this, on the Sewing needles of the present invention, shaft bears two-sided roll extrusion, and the result is divided into first section and second section shaft.Simultaneously, include necking segment moulding before pinprick of the enough degree of depth clearances in pinprick top, so the rigidity of whole pin has increased.Simultaneously, it increases the space between shaft and the suture, thereby makes sewing operation stable.
That is to say, the present invention proposes a kind of method of making Sewing needles, this pin includes shank, extends the shaft that forms from this shank, reaches the needle point that forms at this shaft far-end, the long continuously ditch of one spill is arranged above, it extends near above-mentioned needle point that part of shaft from shank, along above-mentioned long ditch one pinprick is arranged, and above-mentioned shaft is made band pinprick top clearance, it is characterized in that this method comprises following operation:
The pin blank molding, this pin base has the shank of large diameter cylinder type, the diameter first section shaft slightly littler that forms by shank far-end continuity than handle, the diameter that is formed by first section shaft continuity is than first section second section shaft that shaft is slightly little, and above-mentioned the second shaft constitutes full shaft;
Form second section shaft, it has the corresponding lengthening section of pinprick top clearance with sewing needle;
Shaft is carried out mold pressing forming by the above-mentioned spill Chang Gou of shank till the above-mentioned needle point vicinity of above-mentioned second section shaft and the above-mentioned pinprick of establishing along ditch continuously with the thin muscle sheet that holds pinprick, and with above-mentioned lengthening section distortion to form above-mentioned pinprick top clearance;
After above-mentioned shaft deformation processing, the above-mentioned inner surface of the above-mentioned long ditch of above-mentioned shaft opens with predefined angle.
The formed sectional area of above-mentioned lengthening section correspondingly is about 60 to 70% of above-mentioned second section shaft sectional area;
The formed sectional area of above-mentioned lengthening section correspondingly is about 65% of above-mentioned second section shaft sectional area;
Above-mentioned mold pressing processing is to realize with a secondary adaptive mutually patrix and counterdie;
The angle that the dip mold of using for the above-mentioned lateral surface of the above-mentioned shaft of moulding has the clamping shaft is between 20 degree are spent to 28, and above-mentioned dip mold is taken as 10 degree between 18 degree near the angle in order to the clamping shaft above-mentioned pinprick;
Described top die has projection, and this protruding outer surface is used to form the above-mentioned inner surface of above-mentioned long ditch, and folded angle value is lower than 30 degree between the above-mentioned outer surface of above-mentioned projection;
Be the above-mentioned lateral surface of the above-mentioned shaft of press forming, the holding angle to above-mentioned shaft of above-mentioned dip mold is set at about 24 degree, then is set at about 14 degree in the above-mentioned holding angle of the above-mentioned dip mold in above-mentioned pinprick vicinity;
Be the above-mentioned inner surface of the above-mentioned long ditch of press forming, the angle between the above-mentioned outer surface of the above-mentioned ridge of above-mentioned top die is set at about 28 degree, and the angle between the above-mentioned outer surface in above-mentioned pinprick vicinity is set at about 25 degree;
Above-mentioned lengthening section is the oblique shoulder section at oblique angle with respect to above-mentioned needle body axis and moulding on two on its two ends mat, and above-mentioned lengthening section also is connected by them and above-mentioned second section shaft;
The inclination angle that is arranged near the oblique shoulder section the above-mentioned pinprick is bigger than remaining oblique shoulder section;
Be positioned near the above-mentioned pinprick above-mentioned oblique shoulder section and have the inclination angle and be set at about 9 degree, the oblique shoulder of its remainder section has the inclination angle and is set at about 6.5 and spends;
Be positioned near the above-mentioned pinprick above-mentioned oblique shoulder section and have the inclination angle and be set at about 9 degree, the oblique shoulder of its remainder section has the inclination angle and is set at about 6.5 and spends.
The present invention also proposes a kind of Sewing needles, it is characterized in that, this pin includes a cylindrical large diameter shank, extend the shaft that forms from this shank, and, the long continuously ditch of a spill being arranged above at the formed needle point of this shaft far-end, it extends to that part of shaft in above-mentioned needle point vicinity from shank, along above-mentioned long ditch one pinprick is arranged, above-mentioned shaft is made band pinprick top clearance;
Wherein above-mentioned shaft is divided into first section shaft and second section shaft by two truncated cone sections that are being provided with apart from one another by ground on above-mentioned shaft, above-mentioned pinprick is arranged on second section shaft place.
The above-mentioned pinprick vicinity that necking segment is set at above-mentioned second section shaft is prolonged to above-mentioned second section shaft and to make the above-mentioned second section shaft of sectional area ratio little;
In the clearance of above-mentioned necking segment above the reverse side of above-mentioned long ditch is provided with pinprick;
Thereby above-mentioned shaft has open at a predetermined angle inner surface defines above-mentioned long ditch; With
Above-mentioned necking segment, the clearance of pinprick top and inner surface are all by die forming;
Above-mentioned necking segment is made sectional area and is equivalent to 60 to 70% of second section shaft sectional area approximately;
Angle between above-mentioned inner surface is set at and is lower than 30 degree;
Above-mentioned shaft has the outer surface at flare up 20 to 28 degree angles;
The angle of above-mentioned shaft between that part of above-mentioned outer surface of above-mentioned pinprick vicinity is set at 10 to 18 degree angles.
Above-mentioned angle between above-mentioned outer surface is about 14 degree at above-mentioned shaft place, the above-mentioned part in above-mentioned pinprick vicinity is about 14 degree;
Above-mentioned angle between above-mentioned inner surface is about 28 degree at above-mentioned shaft place, the above-mentioned part in above-mentioned pinprick vicinity is about 25 degree;
The clearance of described pinprick top is shaped by becoming the oblique shoulder section at inclination angle with the axis of pin and two takes on tiltedly that the direction clearance links to each other with second section shaft on section this pinprick by this at its two end.
Inclination angle at the inclination angle of the oblique shoulder section of pinprick vicinity than remaining oblique shoulder section is big.
The present invention will be further described below in conjunction with accompanying drawing.
Fig. 1 one is suitable for making by method of the present invention the horizontal side view of the pin base that Sewing needles forms through two-sided roll extrusion;
Fig. 2 is-for reducing a certain section diameter of shaft again through the horizontal side view of the pin base of plastic working;
Fig. 3 is the longitudinal sectional drawing of the pin base among Fig. 2 after repressed again;
Fig. 4 is the drawing in side sectional elevation of doing along IV-IV among Fig. 3;
Fig. 5 is the drawing in side sectional elevation of doing along V-V among Fig. 3;
Fig. 6 is the drawing in side sectional elevation of doing along IV-IV among Fig. 3;
Fig. 7 be according to the made Sewing needles of method of the present invention as the local horizontal of an example to side view;
Fig. 8 is the longitudinal sectional drawing of Sewing needles among Fig. 7;
Fig. 9 is the partial plan layout of Sewing needles needle point in the presentation graphs 7;
Figure 10 is the partial bottom view of Sewing needles needle point in the presentation graphs 7.
Now, detailed description of the present invention will be carried out referring to figs. 1 to Figure 10.
Fig. 1 represents to be suitable for to make Sewing needles and the profile of the pin base 10 that forms through two-sided roll extrusion according to method of the present invention.The pin base 10 that is this shape comprises the cylindrical shank 12 that a major diameter or diameter increase slightly usually, one links to each other with shank 12 by a truncated cone 18 with the one end than the slightly little cylindrical first section shaft 14 of shank 12 diameters, and the slightly little cylindrical second member shaft 16 of the diameter of first section shaft 14 of a ratio and pass through second truncated cone 20 with the one end and link to each other with the other end of first section shaft.First and second section shaft 14 and 16 constitutes a full shaft.
The bad 10 spreading plastic workings of promptly carrying out subsequently such as roll-in of as shown in Figure 1 pin, or after the grinding result become shown in Figure 2 outside shape.The oblique shoulder section 24 and 26 that more particularly makes second section shaft 16 partly form a columniform lengthening section 22 therebetween and link to each other with the two ends of lengthening section 22 respectively after the processing.Lengthening section 22 formed diameters are slightly littler than second section shaft 16, and tiltedly shoulder section 22 and 24 is made truncated cone shape and lengthening section 22 is arranged therebetween.Make this lengthening section 22 with oblique shoulder section 24 and 26 in order that corresponding on the position with the clearance of the formed on one's body pinprick of needle bar of sewing machine top after the completion.The sectional area of lengthening section 22 is preferably made 60 to 70% suitable with second section shaft cross section.The sectional area of better is lengthening section 22 is defined as 65% of second section shaft 16.The sectional area of lengthening section 22 causes fractureing of pin as less than 60% degree that causes the clearance place cross section of Sewing needles on pinprick too to be decreased to make pin intensity to worsen, and sectional area surpasses 70% and then hinders the clearance on the eye to reach the sewing desired depth.
So form pin base 10 in addition mold pressing processing or liquid metal forging and be shaped immediately behind the lengthening section 22, have a continuous long ditch 28 and a pinprick portion 30, this eyelet portion 30 includes the thin muscle sheet 32 of admitting eyelet.Especially specifically, liquid metal forging can make makes the long ditch 28 of spill on the pin base 10, extend to second section shaft 16 continuously from shank 12, almost arrives its end.Simultaneously, liquid metal forging makes second section shaft 16 make the shape of eye 30 with holes, and this eyelet portion is comprising the thin muscle sheet 32 that holds pinprick and be provided with along long ditch, and the clearance of pinprick top is arranged on second section shaft on the side opposite with long ditch 28.The public long ditch 28 that first section shaft 14 and second section shaft 16 and lengthening section 22 are had is made and is mainly U or V-arrangement cross section, therefore the inner surface 34 of shaft upper bound fixed length ditch 28 and outer surface 36 thereof all upwards outwards stretch, and chien shih becomes a predetermined angle mutually.
The U-shaped cross section of first section and second section shaft 14 and 16 will so be set: the size that makes lengthening section 22 is smaller than second section shaft 16.The lengthening part 22 that so shapes makes the Sewing needles after the completion have a necking part 38 in the anterior position of eyelet portion 30 as shown in Figure 7.Especially clearance 40 is made concavity by oblique shoulder 42 and 44 above pinprick on the lengthening section 22, makes the axis with respect to pin bad 10 be inclined to a predetermined inclination angle.A short ditch 46 is made in its side opposite with long ditch 28 by eyelet portion 30, and mainly a section by contiguous pinprick top clearance 40 extends to needle point, thereby forms the thin gusset 32 that holds pinprick, will make pinprick on this.
In addition, that section that liquid metal forging also makes pin base 10 will make needle point in the future on second section shaft is located in addition, makes flat section 48 that side direction is recessed at the free end of this second section shaft.So form flat section 48 makes pin bad 10 be able to roll in accordance with regulations when the mold pressing by the metal that is constituted, and between and pressing mold that die forging use bad at pin along the bad positioning relation of vertically being set up expection of pin.Pressing mold or the tram of punch die when simultaneously, this flat section 48 also makes mold pressing for guaranteeing that punching press accurately has enough degree in stamping procedure subsequently.
Mold pressing is by the patrix with V-arrangement projection 52 and has corresponding to the counterdie 54 of projection 52 depression 56 and realize.First and second section shaft 14 and 16 is subjected to the forging and pressing distortion upper and lower mould 50 and 54, and making flows in the neutral gear of metal between pressing mold of forming rod body section is unlikely to partly to produce any burr at shaft with satisfaction guaranted landform growth ditch and eyelet portion 30.
Define 34 spaces that constituted of interior hand hay cutter face of long ditch 28 by each section shaft 14 and 16, and preferably upwards be launched into 10 to 28 degree angles from the viewpoint of sewing and mold pressing by 36 spaces that constituted of its lateral surface.For example, two lateral surfaces of the V-arrangement projection 52 of patrix 50, on the position corresponding to first section, second section shaft, mutually between flare up θ
11Angle, this angle are lower than 30 ° preferably 28 °, and the angle θ that opens of 56 of the hole inner surfaces of counterdie 54
21Preferably 20 to 28 spend.Angle θ
21As be lower than 20 degree, and then make the bad excess stock of pin when mold pressing, be difficult to upwards flow, so that the height of rod body section 14 and 16 reduces, material is flowed downward, reduced the life-span of counterdie 54; And θ
22The angle is as causing the width in rod body section cross section too to increase greater than 28 degree.Like this, angle θ
21Preferably be set at about 24 degree, using increases the mold bottom surface area, prevents that the throat width of long ditch 28 from too increasing.Angle theta between the outer surface of the V-arrangement of eyelet portion 30 vicinity top dies 50 projection 52 parts
12Be set at about 25 degree, and the angle theta between the inner surface in the hole 56 of dip mold 54
22Then be limited between 10 degree and 18 degree, and table the best is 14 degree.Angle θ
22As be lower than 10 degree the pin base can't be taken out in mould when mold pressing, and θ
22As then when the width of eyelet portion 30 will be made the specification desirable value, causing the bottom radius in hole 56 too small, can't form the side slope of short ditch 46 satisfactorily greater than 18 degree.Like this, the angle θ between two side surfaces in the hole 56 of dip mold 54
22Preferably be set at 14 degree, use guaranteeing that pin base 10 prevents to stick on the mould effectively and takes out ready-madely when mold pressing.In addition, the dual side-edge angle that is noted that the projection 52 of patrix 50 is to be set in the enough big scope, and wearing of suture is pricked and is prevented that bad width of pin from too increasing when being beneficial to increase sewing velocity.
The formation of pinprick top clearance 40 is to have used the lengthening section of original formation 22 backs to realize, overextends in order that prevent necking part 38 side direction.As mentioned above, the external diameter of the lengthening section 22 of pin base 10 will be made the formation that is enough to make clearance 40 above the pinprick of this place's necking segment and has about 65% sectional area corresponding to second section shaft 16.Also has profile in set each the oblique shoulder 24 of lengthening section two ends and 26 according to its oblique angle but not determine more more convenient according to its axial length.In this example, from the inclined angle alpha of the nearer oblique shoulder 24 of eyelet portion 30
1Than from the inclination angle of eyelet portion oblique shoulder 26 far away more greatly.That part of metal of Here it is for the where pin base of eyelet portion vicinity is flowed to long ditch 28, the result makes eyelet portion be made required form, at this moment, the distance that upper limb of pin hole (be installed in according to Sewing needles supposition on the Sewing machines defines) and pin hole top clearance are 40 be provided with clearance 40, forming slopes inwardly becomes the pre-determined tilt horn shape with the axis of pin base 10.The part that its result makes the second section shaft 16 that is positioned at shank 12 1 sides with eyelet portion 30 as the basis, this part is the distance of a pinprick top clearance 40 of skew inwardly, for suture and second section 16 of shaft provide than large space, end by shank 12 sides of pinprick 58 reaches by an end of needle point 60 sides all makes the crest curve shape, respectively shown in label 64 and 66.
The width HS(L of pinprick 58 cores) and the width HS(M of the core of necking segment 38) can suitably select.For example, when illustrated example is used in the Sewing needles of making according to No. 7 pin sizes of Japanese Industrial Standards (JIS) defined, width HS(L) and HS(M) can be respectively 0.65mm and 0.52mm; When making according to No. 9 pin sizes, HS(L) and HS(M) can be respectively 0.75mm and 0.62mm.HS(L during equally, according to No. 11 pin sizes) and HS(M) can be respectively 0.89mm and 0.72mm.The size of its permission compiles difference and is decided to be ± 0.02mm or ± 0.3mm in.
Like this on sharp of the present invention, its shaft bears height behind the two-sided rolling forming have been increased avoiding the increase of its width, so whole needle set has enough rigidity fractureing with the hour hands of stopping to sew.Simultaneously, needle set has pinprick top clearance, and its degree of depth is enough to increase greatly the space between shaft and suture, and its result can realize at a high speed and stable making.In addition, Sewing needles is that pattern is pressed and smooth processing, and pin makes the necking down shape, and therefore pin of the present invention is at penetration resistance and be to have improved aspect the heat reduction that pin produced.As much as possible little.According to above-mentioned viewpoint, tiltedly take on the inclined angle alpha of section 24 and 26
1And α
2Be set at for example correspondingly about 18 degree and about 13 degree.If these angles are represented with respect to the gradient of pin base axis with oblique shoulder 24 and 26 then are about 9 degree and 6.5 degree respectively.
The lengthening section 22 of pin base 10 and tiltedly shoulder section 24 and 26 size relationship between these parts can be determined by following formula easily completing later on Sewing needles mold pressing before:
HL
1＝L
1×0.6
HL
2＝L
2×0.5
HL
3＝H-（HL
1+HL
2）-0.1
HL herein
1, HL
2And HL
3 Be pin base 10 Dou shoulder section 24 and 26 and the length dimension of lengthening section 22 before mold pressing, correspondingly, L
1, L
2And L
3Be respectively the length dimension of bottom of the pin hole top clearance 40 of the length dimension of the oblique shoulder section 42 and 44 that processes the back Sewing needles and pin; H then is the length overall of pin hole top clearance 40.
The processing of removing the thin muscle 32 that holds pinprick through the pin base 10 after this kind mold pressing subsequently is to form pinprick 58.By flat section 48 of second section shaft end is engaged on the locator of punch die, and pin base 10 is fixed on both are aligned with each other guaranteeing accurate punching, thereby realize the shaping of pinprick.Like this, the end of second section shaft is processed to pointed and becomes needle point 60, and the result has finished the processing of Sewing needles 62.
The Sewing needles of so making 62 is made eyelet portion 30 and is had the necking part 38 slightly littler than eyelet portion width at the part place of second section shaft 16 of a side of its shank 12 shown in Fig. 7 to 10.Equally, Sewing needles 62 also has the pinprick top that is concavity by oblique shoulder 42 and 44
Claims (17)
1, a kind of method of making Sewing needles, this pin includes shank, extend the shaft that forms from this shank, and, the long continuously ditch of a spill being arranged above at the needle point that this shaft far-end forms, it extends near above-mentioned needle point that part of shaft from shank, along above-mentioned long ditch one pinprick is arranged, above-mentioned shaft is made the top clearance of band pinprick, it is characterized in that this method comprises following operation:
The pin blank molding, this pin base has the shank of large diameter cylinder type, the diameter first section shaft slightly littler that forms by shank far-end continuity than handle, the diameter that is formed by first section shaft continuity is than first section second section shaft that shaft is slightly little, and above-mentioned the second shaft constitutes full shaft;
Form second section shaft, it has the corresponding lengthening section of pinprick top clearance with sewing needle;
Shaft is carried out mold pressing forming by the above-mentioned spill Chang Gou of shank till the above-mentioned needle point vicinity of above-mentioned second section shaft and the above-mentioned pinprick of establishing along ditch continuously with the thin muscle sheet that holds pinprick, and with above-mentioned lengthening section distortion to form above-mentioned pinprick top clearance;
After above-mentioned shaft deformation processing, the above-mentioned inner surface of the above-mentioned long ditch of above-mentioned shaft opens with predefined angle.
2, by the defined a kind of method of claim 1, it is characterized in that: the formed sectional area of above-mentioned lengthening section correspondingly is about 60 to 70% of above-mentioned second section shaft sectional area.
3, by the defined a kind of method of claim 2, it is characterized in that: the formed sectional area of above-mentioned lengthening section correspondingly is about 65% of above-mentioned second section shaft sectional area.
4, by claim 1 or 2 defined a kind of methods, it is characterized in that: above-mentioned mold pressing processing is to realize with a secondary adaptive mutually patrix and counterdie;
The angle that the dip mold of using for the above-mentioned lateral surface of the above-mentioned shaft of moulding has the clamping shaft is between 20 degree are spent to 28, and above-mentioned dip mold is taken as 10 degree between 18 degree near the angle in order to the clamping shaft above-mentioned pinprick;
Described top die has projection, and this protruding outer surface is used to form the above-mentioned inner surface of above-mentioned long ditch, and folded angle value is lower than 30 degree between the above-mentioned outer surface of above-mentioned projection.
5, by the defined a kind of method of claim 4, it is characterized in that: be the above-mentioned lateral surface of the above-mentioned shaft of press forming, the holding angle to above-mentioned shaft of above-mentioned dip mold is set at about 24 degree, then is set at about 14 degree in the above-mentioned holding angle of the above-mentioned dip mold in above-mentioned pinprick vicinity.
6, by the defined a kind of method of claim 4, it is characterized in that: be the above-mentioned inner surface of the above-mentioned long ditch of press forming, angle between the above-mentioned outer surface of the above-mentioned ridge of above-mentioned top die is set at about 28 degree, and the angle between the above-mentioned outer surface in above-mentioned pinprick vicinity is set at about 25 degree.
7, by the defined a kind of method of claim 5, it is characterized in that: be the above-mentioned inner surface of the above-mentioned long ditch of press forming, the angle between the above-mentioned outer surface of the above-mentioned ridge of above-mentioned top die is set at about 28 degree and angle between the above-mentioned outer surface in above-mentioned pinprick vicinity is set at about 25 degree.
8, by the defined a kind of method of claim 2, it is characterized in that: above-mentioned lengthening section is the oblique shoulder section at oblique angle with respect to above-mentioned needle body axis and moulding on two on its two ends mat, and above-mentioned lengthening section also is connected by them and above-mentioned second section shaft;
The inclination angle that is arranged near the oblique shoulder section the above-mentioned pinprick is bigger than remaining oblique shoulder section.
9, by the defined a kind of method of claim 4, it is characterized in that: above-mentioned lengthening section is the oblique shoulder section at oblique angle with respect to above-mentioned ground body axis and moulding on two on its two ends mat, and above-mentioned lengthening section also is connected by them and above-mentioned second section shaft;
The inclination angle that is arranged near the oblique shoulder section the above-mentioned pinprick is bigger than remaining oblique shoulder section.
10, by the defined a kind of method of claim 8, it is characterized in that: be positioned near the above-mentioned pinprick above-mentioned oblique shoulder section and have the inclination angle and be set at about 9 degree, the oblique shoulder of its remainder section has the inclination angle and is set at about 6.5 and spends.
11, by the defined a kind of method of claim 9, it is characterized in that: be positioned near the above-mentioned pinprick above-mentioned oblique shoulder section and have the inclination angle and be set at about 9 degree, the oblique shoulder of its remainder section has the inclination angle and is set at about 6.5 and spends.
12, a kind of Sewing needles, it is characterized in that, this pin includes a cylindrical large diameter shank, extend the shaft that forms from this shank, and, the long continuously ditch of a spill being arranged above at the formed needle point of this shaft far-end, it extends to that part of shaft in above-mentioned needle point vicinity from shank, along above-mentioned long ditch one pinprick is arranged, above-mentioned shaft is made band pinprick top clearance;
Wherein above-mentioned shaft is divided into first section shaft and second section shaft by two truncated cone sections that are being provided with apart from one another by ground on above-mentioned shaft, above-mentioned pinprick is arranged on second section shaft place.
The above-mentioned pinprick vicinity that necking segment is set at above-mentioned second section shaft is prolonged to above-mentioned second section shaft and to make the above-mentioned second section shaft of sectional area ratio little;
In the clearance of above-mentioned necking segment above the reverse side of above-mentioned long ditch is provided with pinprick;
Thereby above-mentioned shaft has open at a predetermined angle inner surface defines above-mentioned long ditch; With
Above-mentioned necking segment, the clearance of pinprick top and inner surface are all by die forming.
13, by the defined a kind of Sewing needles of claim 12, it is characterized in that: above-mentioned necking segment is made sectional area and is equivalent to 60 to 70% of second section shaft sectional area approximately.
14, it is characterized in that by claim 12 or 13 defined a kind of Sewing needless: the angle between above-mentioned inner surface is set at and is lower than 30 degree;
Above-mentioned shaft has the outer surface at flare up 20 to 28 degree angles;
The angle of above-mentioned shaft between that part of above-mentioned outer surface of above-mentioned pinprick vicinity is set at 10 to 18 degree angles.
15, by the defined a kind of Sewing needles of claim 14, it is characterized in that: the above-mentioned angle between above-mentioned outer surface is about 14 degree at above-mentioned shaft place, and the above-mentioned part in above-mentioned pinprick vicinity is about 14 degree.
16, by the defined a kind of Sewing needles of claim 14, it is characterized in that: the above-mentioned angle between above-mentioned inner surface is about 28 degree at above-mentioned shaft place, and the above-mentioned part in above-mentioned pinprick vicinity is about 25 degree.
17, by claim 12 or 13 defined a kind of Sewing needless, it is characterized in that: the clearance of described pinprick top is shaped by becoming the oblique shoulder section at inclination angle with the axis of pin and two takes on tiltedly that the direction clearance links to each other with second section shaft on section this pinprick by this at its two end;
Inclination angle at the inclination angle of the oblique shoulder section of pinprick vicinity than remaining oblique shoulder section is big.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92105265 CN1039357C (en) | 1992-06-30 | 1992-06-30 | Sewing machine needle and method for manufacturing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92105265 CN1039357C (en) | 1992-06-30 | 1992-06-30 | Sewing machine needle and method for manufacturing same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1080674A true CN1080674A (en) | 1994-01-12 |
| CN1039357C CN1039357C (en) | 1998-07-29 |
Family
ID=4941271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92105265 Expired - Fee Related CN1039357C (en) | 1992-06-30 | 1992-06-30 | Sewing machine needle and method for manufacturing same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1039357C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088568A (en) * | 2013-02-20 | 2013-05-08 | 重庆工业职业技术学院 | Zigzag threading needle |
| CN108368659A (en) * | 2015-10-08 | 2018-08-03 | 格罗兹-贝克特公司 | Needle, the method for manufacturing needle and bind |
-
1992
- 1992-06-30 CN CN 92105265 patent/CN1039357C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103088568A (en) * | 2013-02-20 | 2013-05-08 | 重庆工业职业技术学院 | Zigzag threading needle |
| CN108368659A (en) * | 2015-10-08 | 2018-08-03 | 格罗兹-贝克特公司 | Needle, the method for manufacturing needle and bind |
| US10753024B2 (en) | 2015-10-08 | 2020-08-25 | Groz-Beckert Kg | Sewing machine needle, method for producing a sewing machine needle, and sewing method |
| CN108368659B (en) * | 2015-10-08 | 2021-03-30 | 格罗兹-贝克特公司 | Sewing machine needle, method for producing a sewing machine needle and sewing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1039357C (en) | 1998-07-29 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 19980729 Termination date: 20100630 |