CN107725070A - A kind of shield segment assembling location lug set and its application in shield segment assembling - Google Patents
A kind of shield segment assembling location lug set and its application in shield segment assembling Download PDFInfo
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- CN107725070A CN107725070A CN201711203674.1A CN201711203674A CN107725070A CN 107725070 A CN107725070 A CN 107725070A CN 201711203674 A CN201711203674 A CN 201711203674A CN 107725070 A CN107725070 A CN 107725070A
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- Prior art keywords
- location lug
- shield
- duct piece
- lug set
- shield duct
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 238000010276 construction Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 238000009434 installation Methods 0.000 claims abstract description 7
- 238000007363 ring formation reaction Methods 0.000 claims abstract description 5
- 239000007767 bonding agent Substances 0.000 claims description 20
- 239000003063 flame retardant Substances 0.000 claims description 18
- 239000003365 glass fiber Substances 0.000 claims description 10
- 230000002195 synergetic effect Effects 0.000 claims description 10
- 229920002302 Nylon 6,6 Polymers 0.000 claims description 9
- 238000001746 injection moulding Methods 0.000 claims description 9
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000007493 shaping process Methods 0.000 claims description 7
- -1 compatilizer Substances 0.000 claims description 6
- 206010039424 Salivary hypersecretion Diseases 0.000 claims description 4
- 208000026451 salivation Diseases 0.000 claims description 4
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexamethylene diamine Natural products NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 claims description 3
- 238000001291 vacuum drying Methods 0.000 claims description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical group [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims 1
- 229910052796 boron Inorganic materials 0.000 claims 1
- 239000011701 zinc Substances 0.000 claims 1
- 229910052725 zinc Inorganic materials 0.000 claims 1
- 239000004677 Nylon Substances 0.000 abstract description 10
- 229920001778 nylon Polymers 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000003780 insertion Methods 0.000 abstract description 2
- 230000037431 insertion Effects 0.000 abstract description 2
- 238000004080 punching Methods 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 4
- 235000011613 Pinus brutia Nutrition 0.000 description 4
- 241000018646 Pinus brutia Species 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000009966 trimming Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical group [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000003340 retarding agent Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
- E21D11/083—Methods or devices for joining adjacent concrete segments
-
- 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
- B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
-
- 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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14598—Coating tubular articles
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/387—Borates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Architecture (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
A kind of shield segment assembling location lug set and its application in shield segment assembling, belong to construction nylon products processing technique field.The present invention has been abandoned in the prior art with the design of the complicated shield duct piece of locating bar or concavo-convex tongue-and-groove, in shield duct piece side（Joint face）The position of prefabricated detent; installation location lug covers spacing for installing between two panels section of jurisdiction; and can is effectively protected arc connecting bolt while ensure that section of jurisdiction construction assembling spacing requirement; make punching block design processing technology optimization; steel bushing insertion production is also added inside location lug set, pipe sheet assembling cyclization construction quality is effectively ensured.
Description
Technical field
The present invention relates to a kind of shield segment assembling location lug set and its application in shield segment assembling, belong to construction
Nylon products processing technique field.
Background technology
Shield duct piece occurs " faulting of slab ends " phenomenon during to prevent assembly when constructing assembled, influences that construction is assembled, structure stress
State, waterproof effect, serious entail dangers to safety for tunnel engineering.As shown in Fig. 1-1,1-2, when initial shield duct piece designs,
Blocking surface（Joint face）Concavo-convex tongue-and-groove is designed, it is spacing during ensureing pipe sheet assembling, though to facilitate construction assembled for the design, to knot
Structure designs and cost of manufacture brings adverse effect.Influence to reduce this respect, taken as shown in Fig. 2-1,2-2, during Segment design
Disappeared the design of rebate, increases locating bar
Carry out it is spacing, which be blocking surface on preset semi-circular recesses, locating bar is set when assembled in groove, this mode compared with
Initial design is slightly lifted, but which increases segment die cost of manufacture, and arc connecting bolt also cannot be protected effectively.
The content of the invention
The purpose of the present invention is the deficiency for above-mentioned existing pipe sheet assembling technology, preferably to reduce mould for shielding pipe piece
Cost of manufacture, effectively protection arc connecting bolt, there is provided a kind of shield segment assembling location lug covers and its spelled in shield duct piece
Application in dress.This method is in blocking surface（The joint face of section of jurisdiction）The prefabricated detent in arc connecting bolt hole site, and spelling
Set during dress nylon location lug cover for it is assembled when it is spacing, it be arc connecting bolt that it is internal, is effectively protected while positioning
Arc connecting bolt is protected, avoids the situation for causing bolt fracture because external force is excessive.
Technical scheme is as follows：A kind of shield segment assembling location lug set, it is characterized in that, the location lug set is by two
Individual bottom surface is identical and overlaps the round platform of connection composition, and the taper of two round platforms is different, and location lug set is axially arranged with connecting cavity；Should
Location lug covers injection molding, including following each component is prepared：Polyhexamethylene adipamide, synergistic fire retardant, expansion type flame-retarding
Agent, compatilizer, glass fibre.
Further, the mass percent of each component is in the location lug set：Polyhexamethylene adipamide 60%, collaboration resistance
Fire agent 13%, expansion type flame retardant 3%, compatilizer 2%, glass fibre 22%.
Further, the synergistic fire retardant is Firebrake ZB.
Further, the location lug set is internal is embedded with steel bushing.
Further, one of round platform lateral surface is provided with some annular bonding agent conduits.
Further, the annular bonding agent conduit is arranged on the less round platform lateral surface of taper, and another taper is larger
Round platform, its lateral surface is made up of the outside conical surface, the inner side conical surface, and the taper of the inner side conical surface is more than the taper of the outside conical surface.
Further, the location lug set connecting cavity is made up of the cylinder chamber at middle part and the tubaeform chamber of both sides.
Above-mentioned location lug is enclosed on the application in shield segment assembling, it is characterized in that, comprise the following steps：
1）Prefabricated shield duct piece：Mould for shielding pipe piece, production shield duct piece are made according to construction requirement, when shield duct piece makes,
Arc link bolt hole is set respectively at the joint face of its both sides, and arc link bolt hole is in one end of shield duct piece joint face
Detent is set, is provided with bolt installation counterbore in the inner side cambered surface of shield duct piece, the counterbore is another with arc link bolt hole
One end communicates；The madial wall of the detent is the cone structure that matches with round platform lateral surface, two neighboring shield duct piece
Junction, the detent of one of joint face, its cross section is circle, and the detent of another joint face, it is horizontal
Ring-shaped section and ring-shaped elongated hole-shape；
2）Prepare location lug set：1. making mould, design taper cut-off rule is die parting line, by four types of uniformly arranging from top to bottom
Chamber；
2. poly- adipoyl hexamethylene diamine, glass fibre are put into 110 DEG C of vacuum drying chamber and are dried in vacuo, after the completion of add
Synergistic fire retardant, expansion type flame retardant, compatilizer are uniformly mixed；
3. location lug mold is installed in screw injection molding machine, adjusting bolt barrel temperature：Back segment temperature be 260-300 DEG C,
Stage casing temperature is 265-295 DEG C, front-end temperature is 260-290 DEG C, and nozzle temperature is 250-270 DEG C, mold temperature 30-80
DEG C, injection pressure 75-130MPa, screw speed 70-110r/min, a mould four, location lug set is finally made；
3）Assembled shield duct piece is covered using location lug：When section of jurisdiction cyclization is assembled, add in the annular bonding agent conduit of location lug set
Add bonding agent, one end of location lug cuff bonding agent screwed in the circular detent of shield duct piece, after the completion of it is assembled next
Block shield duct piece；Next piece of section of jurisdiction allows the other end of location lug set slowly to enter by the tangential direction rotation of location lug set center line
Enter in the block section of jurisdiction annular elongated hole-shape detent；After the completion of, the arc using arc connecting bolt through two shield duct pieces
The connecting cavity of link bolt hole and location lug set, adjacent two pieces of shield duct pieces progress bolt connection is fixed, location lug is enclosed on
Also arc connecting bolt is effectively protected while positioning；Ring it is assembled with hold it is identical to assembling method, during shield segment assembling
Annular elongated hole-shape detent adjustment good position must be utilized, the tangential direction that center line is then covered along location lug allows location lug
Set enters in next piece of section of jurisdiction detent, carries out successively assembled.
Further, step 2）In, during injection after die sinking by steel bushing location and installation in mold cavity, then matched moulds, adds
Pay attention to adjustment shot after entering steel bushing, prevent that overlap is closed in excessive salivation, eventually form the internal location lug for being embedded with steel bushing
Set.
Further, step 1）In, set arch screw bolt to shape plug, positioning mold insert, arc in mould for shielding pipe piece
Bolt shaping plug one end is connected with core rod, and the other end is connected with positioning mold insert, and positioning mold insert is installed on section of jurisdiction mould by bolt
In the positioning hole for having side form, vestibule is provided with inside positioning mold insert；After shield duct piece is made, arch screw bolt shaping plug, shape are removed
Into link bolt hole, positioning mold insert is removed, forms detent.
Location lug set in the present invention uses nylon66 fiber, and for major ingredient, nylon66 fiber quality is lighter, is readily transported and installs, uses
Injection molding, fabrication cycle is short, high mechanical strength, good toughness, has higher tension, compression strength, specific tensile strength is higher than gold
Category, it is strong to the absorbability of impacting, answer force vibration, it is not easy to break.Nylon66 fiber also has preferable heat-resisting, wear-resisting, corrosion resistance
Can, after glass fiber reinforcement, its mechanical strength, rigidity, heat resistance, creep resistant and endurance life increase substantially.
In the present invention, location lug set uses the frustum cone structure of two different tapers, and in the less round platform lateral surface of taper
Annular bonding agent conduit is set, and the round platform of different tapers, which is advantageous to distinguish when mounted, cuts plumage side and near coal-mine side.Location lug is nested with
In the locating slot of shield duct piece, tenon set in position additionally uses bonding agent with shield duct piece and is connected, with tapered frustum cone structure and
With tapered positioning slot structure, the contact area of both sides is increased, makes connection more firm.Location lug set is divided into compared with Small Taper
The round platform of round platform and larger taper, the round platform of larger taper are designed to the lateral surface of two different tapers, can so disperseed again
Stress, prevent stress from concentrating and bringing fracture.A circle steel bushing is embedded with location lug set, further enhances location lug set
Intensity, its fracture is prevented, improve the protection to arc connecting bolt.
The present invention has been abandoned in the prior art with the design of the complicated shield duct piece of locating bar or concavo-convex tongue-and-groove, in shield pipe
Piece side（Joint face）The position of prefabricated detent, install location lug between two panels section of jurisdiction additional and cover spacing for installing, ensureing
And can is effectively protected arc connecting bolt while section of jurisdiction construction assembling spacing requirement, makes punching block design processing technology excellent
Change, steel bushing insertion production is also added inside location lug set, pipe sheet assembling cyclization construction quality is effectively ensured.
Location lug set in the present invention is made using injection molding manner, product high mechanical strength, because its crystallinity is high, therefore
Its rigidity, heat resistance are all higher, can meet the requirement of shield-tunneling construction well, and design a mould four, in location lug set
Portion adds steel bushing, the injection production technology of dual reinforcement, production efficiency high, significantly reduces fabrication cycle and cost.The present invention
Method is simple, reasonable science, and the location lug set of steel bushing is internally embedded during making, and its indices can be obviously improved, be effectively ensured
Pipe sheet assembling positions and effectively protects connecting bolt；Same this method can be widely used for the production of various construction class nylon guidees,
Improve subsequent construction quality, performance and service life.
Brief description of the drawings
Fig. 1-1 is the shield duct piece schematic diagram that concavo-convex tongue-and-groove is used in background technology；
Fig. 1-2 is A direction views in Fig. 1-1；
Fig. 2-1 is the shield duct piece schematic diagram that locating bar is used in background technology；
Fig. 2-2 is A direction views in Fig. 2-1；
Fig. 3-1 is the schematic diagram of shield duct piece in the present invention；
Fig. 3-2 is cambered surface schematic diagram on the inside of shield duct piece in the present invention；
Fig. 4 is that arch screw bolt shapes plug, positions the connection diagram of mold insert in mould for shielding pipe piece in the present invention；
Fig. 5-1 is the cover half schematic diagram of location lug mold in the present invention（Comprising die cavity, sliding block push pedal, push rod, guide pillar, bottom plate,
Limited block etc.）；
Fig. 5-2 is the dynamic model of location lug mold in the present invention（Cavity plate）（Include die cavity, Angle Pin, guide pin bushing, bottom plate, limited block
Deng）；
Fig. 6-1 is the sectional view that location lug covers in the present invention；
Fig. 6-2 is the stereogram that location lug covers in the present invention；
Fig. 6-3 is the sectional view that location lug covers in the present invention；
Fig. 6-4 is the side view that location lug covers in the present invention；
Fig. 6-5 be in Fig. 6-4 A-A to sectional view；
Fig. 6-6 is the stereogram that location lug covers in the present invention；
In figure：1 location lug set connecting cavity, 2 location lugs set in steel bushing, 3 annular bonding agent conduits, the less round platform of 4 tapers,
The inner side conical surface, 8 positioning in the larger round platform of the outside conical surface, 7 tapers in the larger round platform of the larger round platform of 5 tapers, 6 tapers
The cylinder chamber at tenon set middle part, the tubaeform chamber of 9 location lugs set both sides, 10 arc link bolt hole, 11 bolts installation counterbore, 12 circles
Shape detent, 13 annular elongated hole-shape detents, 14 arch screw bolts shaping plug, 15 positioning mold inserts, 16 segment die side forms,
17 arc connecting bolts.
Embodiment
Feature of present invention and other correlated characteristics are described further below in conjunction with accompanying drawing.
As shown in Fig. 6-1 to 6-6, a kind of shield segment assembling location lug set is identical by two bottom surfaces and overlap connection
Round platform form, location lug set is internal to be embedded with steel bushing 2, and location lug set is axially arranged with connecting cavity 1, connecting cavity by middle part cylinder chamber
8 and the tubaeform chambers 9 of both sides form.
The taper of two round platforms is different, and one of round platform lateral surface is provided with some annular bonding agent conduits 3, annular bonding
Agent conduit is arranged on the less lateral surface of round platform 4 of taper, the larger round platform 5 of another taper, its lateral surface by the outside conical surface 6,
The inner side conical surface 7 is formed, and the taper of the inner side conical surface is more than the taper of the outside conical surface.
The location lug covers injection molding, including following each component is prepared：Polyhexamethylene adipamide, synergistic fire retardant
（Firebrake ZB）, expansion type flame retardant, compatilizer, glass fibre, the mass percent of each component is：Polyhexamethylene adipamide 60%,
Synergistic fire retardant 13%, expansion type flame retardant 3%, compatilizer 2%, glass fibre 22%.
In location lug set, whole length 91mm, the shared basal diameter of two round platforms is 86.8mm；The less round platform of taper
4, its end face diameter is 75.8mm, and the length of round platform 4 is 45.5mm；The larger round platform 5 of taper, the end face of its outside conical surface 6 are straight
Footpath is 75.8mm, and the segment length is 35.5mm, and the minimum diameter of its inner side conical surface 7 is 82.8mm, and the segment length is 10mm；Connection
In chamber, the internal diameter of cylinder chamber 8 is 51.8mm, and the depth of cylinder chamber is 61mm, and the maximum inner diameter of horn chamber is 54.9mm, horn chamber
Depth be 15mm.Location lug set under the size connects to section of jurisdiction and the protection of connecting bolt is optimum state, location lug
Cover too small, protection is inadequate, and location lug set is excessive, increases production cost and cost of transportation.
As shown in Fig. 3-1,3-2, when shield duct piece designs, the Design Orientation groove at joint face, section of jurisdiction Qie Yu sides are circle
Shape detent 12, it is easy to positioning sleeve installation to fix, near coal-mine side is ring elongated hole detent 13, is easy to assembled adjustment positioning,
The junction of i.e. two neighboring shield duct piece, the detent of one of joint face is circle 12, and another joint face is determined
Position groove elongated hole-shape 13 in a ring.As shown in figure 4, arch screw bolt is set to shape plug 14, positioning edge in mould for shielding pipe piece
Part 15, arch screw bolt shaping plug one end are connected with core rod, and the other end is connected with positioning mold insert, and positioning mold insert is installed by bolt
In in the positioning hole of segment die side form 16, vestibule is provided with inside positioning mold insert；After shield duct piece is made, remove arch screw bolt into
Shape plug, link bolt hole is formed, remove positioning mold insert, form detent.
Positioning nylon tenon Analysis of Nested Design, consider positioning sleeve work progress stress, there are between section of jurisdiction and section of jurisdiction during pipe sheet assembling
For certain shearing force to ensure positioning sleeve intensity, material selection strengthens nylon；Location lug set is first assembled side fixation and set using surface
Count out storage bonding agent conduit 3, be effectively kept bonding agent strengthen it is firm with shield duct piece.Specific practice is as follows：
1. making mould, design taper cut-off rule is die parting line, by four die cavities of uniformly arranging from top to bottom；
2. poly- adipoyl hexamethylene diamine, glass fibre are put into 110 DEG C of vacuum drying chamber and are dried in vacuo, after the completion of add
Synergistic fire retardant, expansion type flame retardant, compatilizer are uniformly mixed；
3. location lug mold is installed in screw injection molding machine, adjusting bolt barrel temperature：Back segment temperature be 260-300 DEG C,
Stage casing temperature is 265-295 DEG C, front-end temperature is 260-290 DEG C, and nozzle temperature is 250-270 DEG C, mold temperature 30-80
DEG C, injection pressure 75-130MPa, screw speed 70-110r/min, a mould four, location lug set is finally made.
Notice that shield duct piece is near coal-mine with cutting plumage direction during pipe sheet assembling, when section of jurisdiction cyclization is assembled, in the annular of location lug set
Addition bonding agent in bonding agent conduit, one end of location lug cuff bonding agent is screwed in the circular detent of shield duct piece,
After the completion of assembled next piece of shield duct piece；Next piece of section of jurisdiction allows location lug set by the tangential direction rotation of location lug set center line
The other end slowly enter in the block section of jurisdiction annular elongated hole-shape detent；After the completion of, pass through two using arc connecting bolt 17
The connecting cavity of arc link bolt hole and the location lug set of individual shield duct piece, bolt connection is carried out by adjacent two pieces of shield duct pieces
It is fixed, arc connecting bolt is also effectively protected while location lug is enclosed on positioning；Ring assembly is identical to assembling method with holding,
Annular elongated hole-shape detent adjustment good position must be utilized during shield segment assembling, then covers cutting for center line along location lug
Line direction allows location lug set to enter in next piece of section of jurisdiction detent, carries out successively assembled.
Location lug set notes also when preparing：
1. location lug mold designs tapered cut-off rule as die parting line, by four die cavities of uniformly arranging from top to bottom, a mould
Four, and shaped using slide block movement and mold location lug surface conduit, dynamic model（Cavity plate）For overall circular cone die cavity.Such as Fig. 5-1
For cover half（Include die cavity, sliding block push pedal, push rod, guide pillar, bottom plate, limited block etc.）, Fig. 5-2 is dynamic model（Cavity plate）（Comprising die cavity,
Angle Pin, guide pin bushing, bottom plate, limited block etc.）.
2. by location lug mould installion in screw injection molding machine, adjustment mold clamping force, opening speed, opening stroke etc..Lock
Mould：Quickly → middling speed → low pressure → high pressure, fast locked mode fast speed, when using general quick, speed is set to 55-75%, pressure
Power is set in 50-75%, and position section presses the length dimension of location lug, to mold the 1/3 of width.Middling speed section, after quick fraction terminates
Middling speed is converted into, the position of middling speed is usually to be closed to template untill one piece, and specific length should regard template plate interval, speed one
As be arranged between 30%-50%, pressure is then between 20%-45%.Low pressure is set, and low speed setting is usually a flash in template contacts
Between, particular location is just located at the numeral in a flash that board display screen is shown and is defined, using this point as standard, i.e., in putting then this not
High pressure, it is then big higher than this point, high pressure is played easily；The speed of setting is usually 15%-25%, depending on depending on different machines, pressure one
As be set in 1-2%, some machines can then be located at 5-15%, and depend on different machines different.High pressure set, the board by and
Speech, locations of high pressure board has all set when dispatching from the factory, comparatively, cannot at will changed, for example shakes male machine and exist
50P, speed relatively low pressure is slightly higher, about in 30-35% or so, and depending on pressure then depends on mould, can value be in 55-85%
Can.
3. melten gel uses middling speed, be set to 45%-75%, melten gel it is simultaneously important be back pressure use, Product Precision will
Ask bigger, the use of back pressure is then bigger, and structure is closer between back pressure can make raw molecule, and then size is more steady for the product molded
Fixed, outward appearance is better.But back pressure is too big, then salivation can be produced, so the use of back pressure takes into full account formed product；Melten gel process is another
One important link is exactly that pine moves back, and pine moves back a point preceding pine and moved back to be moved back with rear pine, and it is acted on to prevent from salivating and reel off raw silk from cocoons, set point speed
And pressure, all between 20%-50%, for the stroke of setting typically between 2-5cm, too long of stroke may make storage inside barrel empty
Gas, it can cause next mould that more bubble occurs.
4. carry out cast filling after the completion of colloidal sol, injection time during filling, the dwell time, cool time is according to mold temperature
It is adjusted.
5. product then has the process of a die sinking after cooling and shaping, die sinking is substantially the inverse process die sinkings of matched moulds
Latter end then has one to set at a slow speed, after the completion of die sinking, process that product must eject：
1）Before top:Qian Fenliangge classes are pushed up, the first stage is divided into middle pressure at a slow speed, is that product is gently ejected a part, then
It is middle pressure middling speed top, middle pressure middling speed is generally referred to as 35%-55%, and low speed is then possible to low to 5%, and ejection stroke setting is top
It is slightly bigger 1-2cm than product vertical depth to go out length；Push rod, which retracts, includes two processes and the process of roof fall is basically identical, top
The terminal moved back should reserve 1-3cm space, to protect thimble oil pipe not to be damaged, the ejection of thimble mode single；
2）Material road part is trimmed after ejection, notices that trimming prevents product the defect caused by trimming during trimming.
6. nylon location lug set is internal plus during steel bushing, steel bushing of first sizing out, steel bushing is positioned after die sinking during injection
In die cavity, then matched moulds, pays attention to adjustment shot after adding steel bushing, prevents that overlap is closed in excessive salivation.
7., need to be by nylon because interiors of products residual stress need to eliminate and using in wet area after the completion of nylon location lug set
Tenon set carries out heat treatment and damping moisture absorption processing, and packaging is shipped to construction site after nylon location lug set completes.
Claims (10)
1. a kind of shield segment assembling location lug set, it is characterized in that, the location lug set is identical by two bottom surfaces and overlaps connection
Round platform form, the taper of two round platforms is different, and location lug set is axially arranged with connecting cavity（1）；The location lug covers injection molding, bag
Following each component is included to be prepared：Polyhexamethylene adipamide, synergistic fire retardant, expansion type flame retardant, compatilizer, glass fibre.
2. a kind of shield segment assembling location lug set according to claim 1, it is characterized in that, each group in the location lug set
Part mass percent be：Polyhexamethylene adipamide 60%, synergistic fire retardant 13%, expansion type flame retardant 3%, compatilizer 2%, glass
Fiber 22%.
3. a kind of shield segment assembling location lug set according to claim 1, it is characterized in that, the synergistic fire retardant is boron
Sour zinc.
4. a kind of shield segment assembling location lug set according to claim 1, it is characterized in that, the location lug set is internal embedding
There is steel bushing（2）.
5. a kind of shield segment assembling location lug set according to claim 1, it is characterized in that, one of round platform lateral surface
Provided with some annular bonding agent conduits（3）.
6. a kind of shield segment assembling location lug set according to claim 5, it is characterized in that, the annular bonding agent conduit
It is arranged on the less round platform of taper（4）Lateral surface, the larger round platform of another taper（5）, its lateral surface is by the outside conical surface（6）、
The inner side conical surface（7）Form, the taper of the inner side conical surface is more than the taper of the outside conical surface.
7. a kind of shield segment assembling location lug set according to claim 1, it is characterized in that, the location lug covers connecting cavity
By the cylinder chamber at middle part（8）With the tubaeform chamber of both sides（9）Form.
8. the location lug according to any one of claim 1-7 is enclosed on the application in shield segment assembling, it is characterized in that, bag
Include following steps：
1）Prefabricated shield duct piece：Mould for shielding pipe piece, production shield duct piece are made according to construction requirement, when shield duct piece makes,
Arc link bolt hole is set respectively at the joint face of its both sides（10）, arc link bolt hole is in shield duct piece joint face
One end sets detent, and bolt installation counterbore is provided with the inner side cambered surface of shield duct piece（11）, the counterbore is connected spiral shell with arc
The other end of keyhole communicates；The madial wall of the detent is the cone structure to match with round platform lateral surface, two neighboring
The junction of shield duct piece, the detent of one of joint face, its cross section are circle（12）, another joint face determines
Position groove, its cross section elongated hole-shape in a ring（13）；
2）Prepare location lug set：1. making mould, design taper cut-off rule is die parting line, by four types of uniformly arranging from top to bottom
Chamber；
2. poly- adipoyl hexamethylene diamine, glass fibre are put into 110 DEG C of vacuum drying chamber and are dried in vacuo, after the completion of add
Synergistic fire retardant, expansion type flame retardant, compatilizer are uniformly mixed；
3. location lug mold is installed in screw injection molding machine, adjusting bolt barrel temperature：Back segment temperature be 260-300 DEG C,
Stage casing temperature is 265-295 DEG C, front-end temperature is 260-290 DEG C, and nozzle temperature is 250-270 DEG C, mold temperature 30-80
DEG C, injection pressure 75-130MPa, screw speed 70-110r/min, a mould four, location lug set is finally made；
3）Assembled shield duct piece is covered using location lug：When section of jurisdiction cyclization is assembled, add in the annular bonding agent conduit of location lug set
Add bonding agent, one end of location lug cuff bonding agent screwed in the circular detent of shield duct piece, after the completion of it is assembled next
Block shield duct piece；Next piece of section of jurisdiction allows the other end of location lug set slowly to enter by the tangential direction rotation of location lug set center line
Enter in the block section of jurisdiction annular elongated hole-shape detent；After the completion of, utilize arc connecting bolt（17）Through two shield duct pieces
The connecting cavity of arc link bolt hole and location lug set, adjacent two pieces of shield duct pieces progress bolt connection is fixed, location lug
Also arc connecting bolt is effectively protected while being enclosed on positioning；Ring is assembled with holding, shield duct piece spelling identical to assembling method
Annular elongated hole-shape detent adjustment good position must be utilized during dress, it is fixed then to be allowed along the tangential direction of location lug set center line
Position tenon set enters in next piece of section of jurisdiction detent, carries out successively assembled.
9. location lug according to claim 8 is enclosed on the application in shield segment assembling, it is characterized in that, step 2）In, note
After being molded during modeling by steel bushing location and installation in mold cavity, then matched moulds, pays attention to adjustment shot after adding steel bushing, prevents from producing
Overlap is closed in raw excessive salivation, eventually forms the internal location lug set for being embedded with steel bushing.
10. location lug according to claim 8 is enclosed on the application in shield segment assembling, it is characterized in that, step 1）In,
Arch screw bolt is set to shape plug in mould for shielding pipe piece（14）, positioning mold insert（15）, arch screw bolt shaping plug one end and mould
Core is connected, and the other end is connected with positioning mold insert, and positioning mold insert is installed on segment die side form by bolt（16）Positioning hole in,
Vestibule is provided with inside positioning mold insert；After shield duct piece is made, arch screw bolt shaping plug is removed, link bolt hole is formed, removes
Mold insert is positioned, forms detent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711203674.1A CN107725070A (en) | 2017-11-27 | 2017-11-27 | A kind of shield segment assembling location lug set and its application in shield segment assembling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711203674.1A CN107725070A (en) | 2017-11-27 | 2017-11-27 | A kind of shield segment assembling location lug set and its application in shield segment assembling |
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| Publication Number | Publication Date |
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| CN107725070A true CN107725070A (en) | 2018-02-23 |
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ID=61219432
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711203674.1A Pending CN107725070A (en) | 2017-11-27 | 2017-11-27 | A kind of shield segment assembling location lug set and its application in shield segment assembling |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108756959A (en) * | 2018-07-11 | 2018-11-06 | 中国铁建重工集团有限公司 | A kind of section of jurisdiction vacuum grabbing device and development machine |
| CN109653768A (en) * | 2018-12-29 | 2019-04-19 | 北京城建信捷轨道交通工程咨询有限公司 | Adjustable support, shield duct piece and adjusting method for shield duct piece inner wall |
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