CN104294487B - A kind of cloth pressing foot - Google Patents
A kind of cloth pressing foot Download PDFInfo
- Publication number
- CN104294487B CN104294487B CN201410449415.7A CN201410449415A CN104294487B CN 104294487 B CN104294487 B CN 104294487B CN 201410449415 A CN201410449415 A CN 201410449415A CN 104294487 B CN104294487 B CN 104294487B
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- China
- Prior art keywords
- boss
- cover plate
- control stick
- cloth pressing
- pressing foot
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Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B29/00—Pressers; Presser feet
- D05B29/06—Presser feet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0005—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor using fibre reinforcements
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B29/00—Pressers; Presser feet
- D05B29/02—Presser-control devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
The present invention relates to a kind of cloth pressing foot, including body, noumenal seat and Dan Hua mechanism, body is made up of POM composite, on the upper surface of body, vertical protrusion is formed with on the side of boss I and boss II and body vertical protrusion and is formed with boss III, through hole is all offered on boss I and boss II, highlight vertically downward in one end of the lower surface of body and be formed with support column, noumenal seat is made up of PC material, vertically it is connected in the other end of body lower surface, Dan Hua mechanism is arranged on the upper surface of body, the control stick made including spring and metal material and cover plate, the through hole being opened on boss I and boss II is run through in one end of control stick, control stick is fixed with back-up ring, the other end of control stick is fixed with cover plate, it is provided with sliding tray in the side of cover plate, sliding tray is limited on boss III.Present configuration is simple, overall weight is light, but the mechanical properties such as intensity, rigidity, hardness do not reduce, easy to use, versatility is stronger.
Description
Technical field
The invention belongs to textile technology field, relate to a kind of sewing device, particularly a kind of
Cloth pressing foot.
Background technology
Cloth pressing foot executes stressed component on sewing surface, is divided by its function as commonly pressing
Pin, extraordinary presser feet.From patent classification, extraordinary presser feet can be divided into by the portion that can be movable relatively
Part and two big classes of band roller bearing.Cloth pressing foot has generally included cloth pressing foot body, the most existing
A kind of Caterpillar presser foot for sewing machine, it, by the cloth pressing foot body with gap, uses cylinder
The series cylinder that axle is contained on body, the crawler belt being enclosed within outside cylinder forms, a wherein cylinder
Outer surface is provided with decorative pattern, is applied in the drum shaft one end on this decorative pattern cylinder equipped with ratchet,
Stopping wheel has been taken on ratchet.
This technology due to use caterpillar belt structure and can only one-way movement, therefore, it is to avoid cloth
The possibility that material is scratched.But this technical pattern is complicated, and manufacturing process is too high, and then makes
Using more complicated, versatility is poor.
In sum, for solving the deficiency on existing cloth foot pressing structure, need design one
Simple in construction, the cloth pressing foot that easy to use, versatility is stronger.
Summary of the invention
It is an object of the invention to there are the problems referred to above for existing technology, it is proposed that a kind of
Simple in construction, the cloth pressing foot that easy to use, versatility is stronger.
The purpose of the present invention can be realized by following technical proposal: a kind of cloth pressing foot, bag
Include
Body, described body is elongated, vertically protrudes formation on the upper surface of body
Vertical protrusion on the side of boss I and boss II and body is had to be formed with boss III, boss
I and boss II on all offer the through hole of concentric, hang down in one end of the lower surface of body
Directly be downwardly projected and be formed with support column, boss II between boss I and support column, institute
State the pin hole offering the upper and lower surface running through body on support column；
Noumenal seat, is vertically connected in the other end of body lower surface；
Dan Hua mechanism, is arranged on the upper surface of body, including control stick, cover plate and bullet
Spring, one end of described control stick runs through the through hole being opened on boss I and boss II,
Be fixed with on control stick back-up ring and when action bars moves axially back-up ring can be resisted against boss II
On, control stick is arranged with spring and spring one end is resisted against on boss I, the other end
Being resisted against on back-up ring, the other end of described control stick is fixed with cover plate, in the side of cover plate
Being provided with sliding tray, described sliding tray is limited on boss III.
In above-mentioned a kind of cloth pressing foot, described body is made up of POM composite,
Described POM composite mainly is become to be grouped into by following mass percent: toughener:
8-15%, kollag: 8-15%, reinforcing fiber: 5-10%, formaldehyde absorbent:
0.1-0.5%, surplus are POM.
POM is commonly called as matching steel or taking steel by force, has the Rockwell hardness of metalloid, intensity and steel
Property, smooth surface, coefficient of friction is little, noiselessness, self lubricity, creep-resistant property,
Good stability of the dimension, fatigue durability and anti-wear performance are preferable.But, common POM
Composite can only use under conditions of low speed, underload, and due to POM's
Degree of crystallinity higher (typically up to 75-85%), crystal grain is big, causes its impact flexibility low,
Rupture the most in a brittle manner.In order to adapt to the requirement of the present invention, the present invention is led to
Cross interpolation toughener, kollag, reinforcing fiber, formaldehyde absorption in above-mentioned formula
The modifying agent such as agent carry out blending and modifying to it, are effectively improved the wear-resisting of POM composite
The mechanical property such as property, toughness, intensity.
Wherein, described toughener is mainly thermoplastic polyurethane, nitrile rubber, second the third rubber
Glue, TPU/nano-SiO2、TPU/nano-CaCO3In one or more.At POM
Can make after the above-mentioned toughener of middle addition the hot strength of POM composite, elastic modelling quantity,
Notch impact strength is greatly improved, and is effectively improved the toughness of POM composite.
Kollag is mainly PTFE powder, powdered graphite, MoS2In powder one
Planting or multiple, the particle diameter of described kollag is 10-200 μm.Filling in POM
Above-mentioned kollag is possible not only to improve its tribological property, it is also possible to strengthen POM
Wearability.In terms of consumption, POM composite adds the above-mentioned lubrication of 2-5%
After agent, the friction factor of POM composite can be made to reduce about 60%, mar proof
1-2 times can be improved, continue to increase consumption, the tribological property of POM composite and resistance to
Polishing machine improves and continues to increase；But, the addition of above-mentioned lubricant makes POM be combined
The mechanical property of material and processing characteristics deterioration.Therefore, according to above-mentioned lubricant to POM
The combined influence of composite, its consumption is controlled in the range of 8-15% by the present invention.
Reinforcing fiber is mainly the one in glass fibre, carbon fiber, aramid fiber or many
Kind；A diameter of 10-50 μm of described reinforcing fiber, draw ratio is (15-25): 1.Add
Add the reinforcing fiber in amount ranges of the present invention can improve POM composite intensity,
Rigidity also reduces its volume change.And add the benefit in the range of above-mentioned diameter, draw ratio
Strong fiber can improve the wearability of POM composite.
Formaldehyde absorbent is mainly in melamine, dicyandiamide, polyamide, polyurethane
One or more.POM is poor heat stability under forming temperature, releasing formaldehyde gas of degrading
Body, therefore, adds the formaldehyde absorbent of above-mentioned mass percent, Ke Yiti when granulation
Its stability high.
The body of cloth pressing foot of the present invention uses above-mentioned compatibility rational POM composite system
Becoming, light weight, density only has 1.4g/cm3Left and right, uses metal material with prior art
The body made is compared gently a lot, but the performances such as its intensity, hardness and rigidity but with
The body that metal is made is close, the highest.And, the present invention uses POM to be combined
The cloth pressing foot body that material is made has smooth surface, self-lubricating is acted charitably, noiselessness, rub
Wipe the advantages such as coefficient is little, wearability strong, good dimension stability, can substitute for metal completely
Cloth pressing foot body of the present invention prepared by material.Moreover, examine from the sustainable development of resource
Considering, the present invention uses POM composite to prepare cloth pressing foot body also to have extremely important
Meaning and market prospects.
In above-mentioned a kind of cloth pressing foot, the preparation method of described body comprises the following steps:
S1, weigh raw material by the constituent of above-mentioned body and mass percent thereof, will be poly-
Formaldehyde is dried 2-4 hour in being placed on the drying baker that temperature is 60-80 DEG C；
S2, above-mentioned dried POM is mixed with other raw materials, add double spiral shell
In bar extruder, extrude from the head of double screw extruder, obtained by granulator granulation
Pellet；
S3, pellet obtained above is added after drying the barrel in high-speed injection molding machine
In, be heated to molten condition, then by the raw material of molten condition through nozzle injection to mould
In tool, prepare body through pressurize, cooling shaping, die sinking.
The present invention uses POM composite to prepare the technique of cloth pressing foot body simply, permissible
One-shot forming, good integrity；And, use metal material to prepare compress with prior art
Script body is compared, it is not necessary to carry out metalworking technique, saved greatly manufacturing procedure and
The costs of equipment such as process tool, low cost, the cycle is short, and economic effect highlights.
Wherein, the temperature of double screw extruder described in step S2 controls at 170-190 DEG C,
Screw speed is 100-120r/min.
Drying condition described in step S3 is vacuum drying 6-10h at 60-80 DEG C, spray
Mouth temperature is 200-230 DEG C, and mold temperature is 70-100 DEG C, and expulsion pressure is
50-80MPa, jet velocity is 40-70mm/s, and dwell pressure is 30-60MPa, pressurize
Time is 10-20s, and cool time is 20-40s.
In above-mentioned a kind of cloth pressing foot, described noumenal seat by the triangular portion being connected and
Rectangular portion form, the junction between triangular portion and rectangular portion offer arc groove and
Arc groove, with on the lower surface being connected in body, offers elongated hole in rectangular portion center.
The location to this cloth pressing foot can be completed by elongated hole and pin hole, the method registration,
Simple to operate.
In above-mentioned a kind of cloth pressing foot, described noumenal seat is made up of PC material.PC material
Material water white transparency, density only has 1.2g/cm3Left and right, light weight, but it has the highest
Toughness, rigidity, intensity, Izod notched impact strength is up to more than 900J/m, curved
Bent modulus is up to more than 2400MPa；And it is good to have fatigue durability, dimensionally stable, compacted
Become the least, the mechanical property such as good weatherability.The present invention uses PC material to prepare noumenal seat,
Compared with preparing noumenal seat with prior art employing metal material, light weight, but intensity etc.
Mechanical property is close, and preparation technology is simple, can be with one-shot forming, and good integrity is not required to
Metalworking technique to be carried out, has saved the installation cost such as manufacturing procedure and process tool greatly
With, low cost, the cycle is short, and economic effect highlights.
In above-mentioned a kind of cloth pressing foot, the rectangular tabular of described cover plate, described cover plate two
Side downward bending is formed with guide plate and grapple, and sliding tray is opened on guide plate, grapple
In " J " font and be perpendicular to control stick axis, cover plate one end is provided with connecting portion, connects
Portion is perpendicular to cover plate and grapple and is connected on control stick.In product moves back and forth, gear
Circle promotes spring, is compressed spring；Spring promotes back-up ring until back-up ring is resisted against convex
On platform II, in reciprocating motion, guide plate suits with boss III phase, boss III control and
The regulation reciprocating direction of product, this structure has working stability, accuracy high and structure
Simple advantage.
In above-mentioned a kind of cloth pressing foot, described control stick and cover plate are made up of metal material.
In above-mentioned a kind of cloth pressing foot, described control stick and cover plate are made up of 45# steel.
45# steel has higher intensity and preferable machinability, after suitable heat treatment
Can obtain certain toughness, plasticity and wearability, material source is convenient.The present invention handles
Bar and cover plate preferred 45# steel are made, and promote cover plate to move, cover plate under the effect of external force
Drive control stick to move by connecting portion, and then pushed away by the back-up ring being connected on control stick
Dynamic spring-compressed, during counter motion, spring promotes back-up ring, it is achieved the reverse shifting of control stick
Dynamic.In forward and reverse motion process, control stick that 45# steel is made and cover plate and POM
Between the body that composite is made, friction, capability reduces substantially, and resistance to grinding capacity substantially carries
Height, and be significantly reduced by fricative noise during forward and reverse fortune merit.
Compared with prior art, the present invention has a following advantage:
1, using spring structure to instead of the mechanisms such as existing crawler type, processing technology requires relatively
Low, simple in construction.
2, the side of cover plate offers sliding tray, sliding tray and the restriction of the 3rd boss, right
Cover plate carry out spacing while, it is ensured that the reciprocating stability of control stick, raising adds
Work precision.
3, in process, between control stick and cover plate, grind between control stick and body
Damage the least, thus improve the service life of cloth pressing foot.
4, cloth pressing foot body of the present invention uses POM composite to make, and noumenal seat uses
PC material is made, and control stick and cover plate in Dan Hua mechanism use 45# steel to make, so
The cloth pressing foot overall weight made reduces a lot, but the mechanics such as intensity, rigidity, hardness
Performance does not reduce.
5, the POM composite compatibility that cloth pressing foot body of the present invention uses is reasonable, adds
It is entered by the modifying agent such as toughener, kollag, reinforcing fiber, formaldehyde absorbent
Row blending and modifying, is effectively improved the wearability of POM composite, toughness, intensity etc.
Mechanical property.
6, cloth pressing foot body of the present invention uses POM composite to make, and noumenal seat uses
PC material is made, and uses with prior art compared with metal material preparation, is all made without
Metalworking technique, has saved the cost of equipment such as manufacturing procedure and process tool greatly, and
Preparation technology is simple, can be with one-shot forming, and good integrity, low cost, the cycle is short, warp
Help remarkably productive.
7, Dan Hua mechanism of the present invention is in forward and reverse motion process, the behaviour that 45# steel is made
Between the body that vertical pole and cover plate and POM composite are made, friction, capability reduces substantially,
Resistance to grinding capacity significantly improves, and during forward and reverse fortune merit by fricative noise also
Substantially reduce.
Accompanying drawing explanation
Fig. 1 is the structural representation of this cloth pressing foot.
Fig. 2 is the structural representation at another visual angle of this cloth pressing foot.
In figure, 1, body；11, upper surface；111, boss I；112, boss II；
12, lower surface；121, support column；121a, pin hole；13, side；131, boss
Ⅲ；2, noumenal seat；21, boss IV；221, elongated hole；3, Dan Hua mechanism；31, behaviour
Vertical pole；311, back-up ring；32, cover plate；321, guide plate；321a, sliding tray；322、
Grapple；323, connecting portion；33, spring.
Detailed description of the invention
The following is the specific embodiment of the present invention and combine accompanying drawing, the technical side to the present invention
Case is further described, but the present invention is not limited to these embodiments.
As depicted in figs. 1 and 2, in the preferred embodiment, cloth pressing foot includes
Body 1, noumenal seat 2 and Dan Hua mechanism 3, be provided with boss I 111 and convex on body 1
Through hole all offered by platform II 112, boss I 111 and boss II 112, and Dan Hua mechanism 3 includes
Control stick 31, cover plate 32 and spring 33, control stick 31 is fixed with back-up ring 311, behaviour
Vertical pole 31 one end is fed through the two through hole on body 1, and the other end passes through connecting portion 323
Being connected with cover plate 32, control stick 31 is arranged with spring 33, spring 33 is positioned at boss
Between I 111 and boss II 112, when product offers the course of work, body 1 is filled by the external world
Put location, due to cover plate 32 and the fixing connection of control stick 31, in mechanically operated effect
Under, cover plate 32 and control stick 31 synchronizing moving, spring 33 under the effect of back-up ring 311,
Start compressed action；When product starts counter motion, spring 33 starts small spring action, bullet
Spring 33 promotes back-up ring 311 counter motion, and then drives control stick 31 reversely to move, with
The cover plate 32 that control stick 31 is connected realizes reverse slide, completes processing action.
As depicted in figs. 1 and 2, body 1 is elongated, is by upper surface, lower surface
Surrounding composition with side, upper surface 11 vertically protrudes and is formed with boss I 111 and boss
II 112 and body 1 side 13 on vertical protrusion be formed with boss III 131, boss I 111
With all offer the through hole of concentric on boss II 112, vertically dash forward in one end of lower surface 12
Go out to be formed with support column 121, boss II 112 be positioned at boss I 111 and support column 121 it
Between, support column 121 offers pin hole 121a, pin hole 121a through on body 1
Surface 11 and lower surface 12, the diameter of pin hole 121a is gradually reduced from down to up.Support
Post 121 is integrated with body 1, can well keep the stationarity of product, support column 121
On the pin hole 121a that offers while realizing product section location, it is ensured that product steady
Fixed, improve accuracy and the high efficiency of processing.
As depicted in figs. 1 and 2, noumenal seat 2 is made up of transparent PC material, by being connected
The triangular portion connect and rectangular portion form and are made up of transparent PC material, in triangular portion
And the junction between rectangular portion offers arc groove and arc groove and is connected under body
On surface, offer elongated hole in rectangular portion center, by elongated hole 211 and pin hole 121a
Can complete the location to this cloth pressing foot, the method registration, simple to operate；Body
The arc groove offered on seat 2 is tangent with the lower surface 12 of body, facilitates user installation with solid
Determine body 1.
As depicted in figs. 1 and 2, Dan Hua mechanism 3, it is arranged on the upper surface 11 of body 1,
Including control stick 31, cover plate 32 and spring 33, one end of control stick 31 passes and highlights
Boss I 111 and boss II 112 through hole, be fixed with back-up ring 311 on control stick 31,
It is arranged with spring 33 on control stick 31 and spring 33 one end is resisted against on boss I 111,
The other end is resisted against on back-up ring 311, and back-up ring 311 can be resisted against on boss II 112, behaviour
The other end of vertical pole 31 is fixed with cover plate 32, and the described rectangular tabular of cover plate 32 is described
Cover plate 32 both sides downward bending forms guide plate 321 and grapple 322, and sliding tray is opened in
On guide plate 321, grapple 322 is in " J " font and is perpendicular to control stick 31 axis,
The end of cover plate 32 is provided with connecting portion 323, and connecting portion 323 is perpendicular to cover plate 32 He
Grapple 322 and being connected on control stick 31, promotes spring 33 to realize by back-up ring 311
Moving back and forth, simple in construction, versatility is relatively strong, and on noumenal seat, 2 offer elongated hole 321.
In the course of work, under mechanically operated effect, promote the movement of cover plate 32, cover plate
32 drive control stick 31 to move by connecting portion 323, and then by being connected in control stick
Back-up ring 311 on 31 promotes the compression of spring 33, and during counter motion, spring 33 promotes
Back-up ring 311, and then realize the reverse mobile of control stick 31.
It is further preferred that the length of back-up ring 311 and connecting portion 323 is more than boss I 111
With the length of boss II 112, prevent connecting portion 323 and boss I 111 in process
Outer surface directly contacts, and while reducing abrasion, improves kinematic dexterity.
In an initial condition, extraneous driving means is connected the present invention with the grapple 322 of product,
During beginning action, it is driven through grapple 322 and drives cover plate 32 to move, cover plate 32 and behaviour
Vertical pole 31 is connected, and then drives moving axially of control stick 31, and control stick 31 is connected
Back-up ring 311 start compression spring 33, product moves along a straight line, until beginning action knot
Bundle, now spring 33 is in compressive state, guide plate 321 energy that cover plate 32 is arranged
Control and the direction of regulation product motion；During counter motion, spring 33 stretching motion, push away
Dynamic back-up ring 311 counter motion, and then promote control stick 31 counter motion, with control stick
31 cover plates 32 being connected do straight line counter motion under the control of guide plate 321, until
Back-up ring 311 is resisted against on boss II 112, in this structure, by being arranged on boss I 111
And the spring 33 between boss II 112, and spring 33 one end is resisted against on control stick 31
On the back-up ring 311 being connected, it is achieved the reciprocating motion of control stick 31, the side of cover plate 32
On offer sliding tray 321a, sliding tray 321a by the restriction with boss III 111, increase
Strong cloth pressing foot stability in motion process and accuracy, the present invention just uses this spring
33 structures coordinated with back-up ring 31, substantially increase the versatility of product, and structure
Simply, easy to operate.
Wherein, above-mentioned cloth pressing foot body 1 is made up of POM composite, and POM is combined
Material mainly is become to be grouped into by following mass percent: toughener: 8-15%, solid moisten
Lubrication prescription: 8-15%, reinforcing fiber: 5-10%, formaldehyde absorbent: 0.1-0.5%, surplus
For POM.
Table 1: the constituent of embodiment of the present invention 1-4 cloth pressing foot body
And mass percent
Embodiment 1:
Claim by constituent and the mass percent thereof of embodiment 1 cloth pressing foot body in table 1
Taking raw material, in raw material, the particle diameter of kollag is 10-50 μm, the diameter of reinforcing fiber
For 10-20 μm, draw ratio is 15:1.It is 60 DEG C that polyformaldehyde in raw material is placed on temperature
Drying baker in be dried 4 hours.Then dried POM is mixed with other raw materials
Uniformly, adding in double screw extruder, the temperature of double screw extruder controls
170-190 DEG C, screw speed is 100r/min, extrudes from the head of double screw extruder,
Pellet is obtained again by granulator granulation.
The pellet obtained is vacuum dried 10h at 60 DEG C, is subsequently adding in high-speed injection molding machine
Barrel in, be heated to molten condition, then by the raw material of molten condition through excess temperature be
The nozzle of 200 DEG C is mapped in mould in the bet of 50MPa pressure, and mould is previously heated to
70 DEG C, jet velocity is 40mm/s.Last pressurize 20s under 30MPa pressure, cools down 20s
Shaping, die sinking prepare body.
Embodiment 2:
Claim by constituent and the mass percent thereof of embodiment 2 cloth pressing foot body in table 1
Taking raw material, in raw material, the particle diameter of kollag is 50-100 μm, the diameter of reinforcing fiber
For 20-30 μm, draw ratio is 20:1.It is 70 DEG C that polyformaldehyde in raw material is placed on temperature
Drying baker in be dried 3 hours.Then dried POM is mixed with other raw materials
Uniformly, adding in double screw extruder, the temperature of double screw extruder controls
170-190 DEG C, screw speed is 110r/min, extrudes from the head of double screw extruder,
Pellet is obtained again by granulator granulation.
The pellet obtained is vacuum dried 8h at 70 DEG C, is subsequently adding in high-speed injection molding machine
Barrel in, be heated to molten condition, then by the raw material of molten condition through excess temperature be
The nozzle of 210 DEG C is mapped in mould in the bet of 60MPa pressure, and mould is previously heated to
80 DEG C, jet velocity is 50mm/s.Last pressurize 15s under 40MPa pressure, cools down 30s
Shaping, die sinking prepare body.
Embodiment 3:
Claim by constituent and the mass percent thereof of embodiment 3 cloth pressing foot body in table 1
Taking raw material, in raw material, the particle diameter of kollag is 100-150 μm, reinforcing fiber straight
Footpath is 30-40 μm, and draw ratio is 22:1.Polyformaldehyde in raw material is placed on temperature is
It is dried 3 hours in the drying baker of 75 DEG C.Then by dried POM and other raw materials
Mixing, add in double screw extruder, the temperature of double screw extruder controls
170-190 DEG C, screw speed is 115r/min, extrudes from the head of double screw extruder,
Pellet is obtained again by granulator granulation.
The pellet obtained is vacuum dried 7h at 70 DEG C, is subsequently adding in high-speed injection molding machine
Barrel in, be heated to molten condition, then by the raw material of molten condition through excess temperature be
The nozzle of 220 DEG C is mapped in mould in the bet of 70MPa pressure, and mould is previously heated to
90 DEG C, jet velocity is 60mm/s.Last pressurize 12s under 50MPa pressure, cools down 35s
Shaping, die sinking prepare body.
Embodiment 4:
Claim by constituent and the mass percent thereof of embodiment 4 cloth pressing foot body in table 1
Taking raw material, in raw material, the particle diameter of kollag is 150-200 μm, reinforcing fiber straight
Footpath is 40-50 μm, and draw ratio is 25:1.Polyformaldehyde in raw material is placed on temperature is
It is dried 2 hours in the drying baker of 80 DEG C.Then by dried POM and other raw materials
Mixing, add in double screw extruder, the temperature of double screw extruder controls
170-190 DEG C, screw speed is 120r/min, extrudes from the head of double screw extruder,
Pellet is obtained again by granulator granulation.
The pellet obtained is vacuum dried 6h at 80 DEG C, is subsequently adding in high-speed injection molding machine
Barrel in, be heated to molten condition, then by the raw material of molten condition through excess temperature be
The nozzle of 230 DEG C is mapped in mould in the bet of 80MPa pressure, and mould is previously heated to
100 DEG C, jet velocity is 70mm/s.Last pressurize 10s under 60MPa pressure, cooling
40s shaping, die sinking prepare body.
The cloth pressing foot body that embodiment of the present invention 1-4 prepares is carried out performance test, test knot
Fruit is as shown in table 2.
Table 2: the performance test results of the cloth pressing foot body that embodiment of the present invention 1-4 prepares
As known from Table 2, the cloth pressing foot body that POM composite of the present invention is made hardness,
The better performances such as intensity, rigidity, the cloth pressing foot bulk properties made with metal material differs
Very few.And the cloth pressing foot body that POM composite of the present invention is made is also equipped with quality
Gently, smooth surface, self lubricity is good, noiselessness, coefficient of friction are little, wearability is strong,
The advantages such as good dimension stability, and preparation technology is simple, low cost, cycle are short, completely
Can substitute for metal material and prepare cloth pressing foot body of the present invention.
Application Example:
Arbitrarily choose in above-described embodiment 1-4 prepare cloth pressing foot body, with Dan Hua mechanism and
Noumenal seat assembly cost invention cloth pressing foot；Wherein, noumenal seat is used existing skill by PC material
Art is made, and cover plate and control stick in Dan Hua mechanism are used prior art system by metal material
Becoming, the present invention is preferably made up of 45# steel.
Comparative example:
The commercially available cloth pressing foot being made up of metal material.
The cloth pressing foot of Application Example and comparative example is compared, comparative result such as table 3
Shown in.
Table 3: Application Example and the comparative result of comparative example cloth pressing foot
As known from Table 3, the present invention uses plastics and metal material to combine to prepare cloth pressing foot,
And reasonable in design；Compared with the cloth pressing foot of prior art, above-mentioned everyway exists
Clear superiority, cloth pressing foot of the present invention will progressively replace commercially available common cloth pressing foot becomes market master
Stream.
Specific embodiment described herein is only to present invention spirit theory for example
Bright.Those skilled in the art can be to described specific embodiment
Make various amendment or supplement or use similar mode to substitute, but without departing from
The spirit of the present invention or surmount scope defined in appended claims.
Claims (8)
1. a cloth pressing foot, it is characterised in that include
Body, described body is elongated, and on the upper surface of body, vertical protrusion is formed convex
On the side of platform I and boss II and body, vertical protrusion is formed with boss III, boss I and boss
All offer the through hole of concentric on II, highlight shape vertically downward in one end of the lower surface of body
Becoming to have support column, boss II, between boss I and support column, described support column offers
Run through the pin hole of the upper and lower surface of body；
Noumenal seat, is vertically connected in the other end of body lower surface；
Dan Hua mechanism, is arranged on the upper surface of body, including control stick, cover plate and spring,
The through hole being opened on boss I and boss II is run through in one end of described control stick, on control stick
Be fixed with back-up ring and when control stick moves axially back-up ring can be resisted against on boss II, at control stick
On be arranged with spring and spring one end is resisted against on boss I, the other end is resisted against on back-up ring, institute
The other end stating control stick is fixed with cover plate, is provided with sliding tray, described slip in the side of cover plate
Groove is limited on boss III.
A kind of cloth pressing foot the most according to claim 1, it is characterised in that described body
Being made up of POM composite, described POM composite is mainly by following mass percent
One-tenth is grouped into: toughener: 8-15%, kollag: 8-15%, reinforcing fiber: 5-10%,
Formaldehyde absorbent: 0.1-0.5%, surplus are POM.
A kind of cloth pressing foot the most according to claim 2, it is characterised in that described body
Preparation method comprise the following steps:
S1, the constituent of body as described in claim 2 and mass percent thereof weigh former
Material, is dried 2-4 hour in polyformaldehyde is placed on the drying baker that temperature is 60-80 DEG C；
S2, above-mentioned dried POM is mixed with other raw materials, add twin-screw and squeeze
Go out in machine, extrude from the head of double screw extruder, obtain pellet by granulator granulation；
S3, pellet obtained above is added in the barrel in high-speed injection molding machine after drying, add
Heat is to molten condition, then by the raw material of molten condition in nozzle injection to mould, through protecting
Pressure, cooling shaping, die sinking prepare body.
A kind of cloth pressing foot the most according to claim 1, it is characterised in that described body
Seat is made up of the triangular portion being connected and rectangular portion, the company between triangular portion and rectangular portion
The place of connecing offers arc groove and arc groove is connected on the lower surface of body, in rectangular portion center
Offer elongated hole.
A kind of cloth pressing foot the most according to claim 4, it is characterised in that described body
Seat is made up of PC material.
A kind of cloth pressing foot the most according to claim 1, it is characterised in that described cover plate
Rectangular tabular, described cover plate both sides downward bending is formed with guide plate and grapple, and sliding tray is opened
Being located on guide plate, grapple is in " J " font and is perpendicular to control stick axis, sets in cover plate one end
Being equipped with connecting portion, connecting portion is perpendicular to cover plate and grapple and is connected on control stick.
A kind of cloth pressing foot the most according to claim 6, it is characterised in that described manipulation
Bar and cover plate are made up of metal material.
A kind of cloth pressing foot the most according to claim 7, it is characterised in that described manipulation
Bar and cover plate are made up of 45# steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410449415.7A CN104294487B (en) | 2014-09-04 | 2014-09-04 | A kind of cloth pressing foot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410449415.7A CN104294487B (en) | 2014-09-04 | 2014-09-04 | A kind of cloth pressing foot |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104294487A CN104294487A (en) | 2015-01-21 |
| CN104294487B true CN104294487B (en) | 2016-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410449415.7A Active CN104294487B (en) | 2014-09-04 | 2014-09-04 | A kind of cloth pressing foot |
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| Country | Link |
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| CN (1) | CN104294487B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101372794A (en) * | 2008-10-16 | 2009-02-25 | 上海贵衣缝纫设备有限公司 | Adjustment mechanism for presser foot for connection in pattern machine |
| CN204097704U (en) * | 2014-09-04 | 2015-01-14 | 宁波瑞铭机械有限公司 | A kind of cloth pressing foot |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7134223B2 (en) * | 2002-07-23 | 2006-11-14 | Sewing Innovations And Machine Co. | Elastomeric sole for use with converted flatbed sewing machine |
| JP2008161541A (en) * | 2006-12-28 | 2008-07-17 | Yamato Sewing Mach Co Ltd | Presser foot of sewing machine |
| CN201588071U (en) * | 2010-01-13 | 2010-09-22 | 麻佰林 | Novel special tacking machine |
| CN202273071U (en) * | 2011-09-28 | 2012-06-13 | 吴江市润蕾纺织品有限公司 | Cloth presser foot |
| CN203625634U (en) * | 2013-12-06 | 2014-06-04 | 际华三五三四制衣有限公司 | Adjustable presser foot for lockstitch sewing machine |
-
2014
- 2014-09-04 CN CN201410449415.7A patent/CN104294487B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101372794A (en) * | 2008-10-16 | 2009-02-25 | 上海贵衣缝纫设备有限公司 | Adjustment mechanism for presser foot for connection in pattern machine |
| CN204097704U (en) * | 2014-09-04 | 2015-01-14 | 宁波瑞铭机械有限公司 | A kind of cloth pressing foot |
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| Publication number | Publication date |
|---|---|
| CN104294487A (en) | 2015-01-21 |
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