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CN104943160B - A kind of curtain coating type butt welding equipment of composite soft tube - Google Patents

A kind of curtain coating type butt welding equipment of composite soft tube Download PDF

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Publication number
CN104943160B
CN104943160B CN201510271102.1A CN201510271102A CN104943160B CN 104943160 B CN104943160 B CN 104943160B CN 201510271102 A CN201510271102 A CN 201510271102A CN 104943160 B CN104943160 B CN 104943160B
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plug
composite sheet
butt welding
banding
briquetting
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CN104943160A (en
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杜德熙
黄志国
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Guangzhou Rui New Materials Ltd By Share Ltd
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Guangzhou Rui New Materials Ltd By Share Ltd
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Abstract

The invention discloses a kind of curtain coating type butt welding equipment of composite soft tube, including plug, fixture, transmission mechanism and frame;Also include extruder and briquetting;The top position of plug is provided with the groove that axially extends, and the abutment joint rearmost end of banding composite sheet is located at the middle part of groove position rearward;Extruder, which is used to polyethylene micelle being heated at high temperature into after viscous state from its discharging opening, to be exported, and the discharging opening of extruder is arranged on above plug the simultaneously rearward end of alignment indentation;Briquetting is arranged in frame by pressure regulating mechanism, briquetting is contradicted on the abutment joint of banding composite sheet, and the rear end of briquetting is located at the last end position of abutment joint, front end and exceedes the leading section position of groove, and pressure regulating mechanism can adjust pressure of the briquetting to abutment joint.The present invention can realize the continuous butt welding of banding composite sheet, and have the advantages that welding body high mechanical strength, non-welding surface seam gap, equipment mechanism be simple, production efficiency is high.

Description

A kind of curtain coating type butt welding equipment of composite soft tube
Technical field
The present invention relates to a kind of curtain coating type butt welding equipment of composite soft tube.
Background technology
Composite soft tube is that occur successively in the nineties in last century, for replacing original aluminum pipe, due to the advantage of its cost, Develop in daily use chemicals packaging very fast.But rested on always on lap joint process before composite soft tube welding technique, specifically It is exactly:It is the composite sheet of heat sealable material using internal face and outside wall surface, it is left and right that finished product welding rod is placed on into composite sheet The overlapping position at edge, overlapping the slot is compressed with pinch roller, and heats the interior outside of overlapping the slot simultaneously by inside and outside heating component, is made Obtain finished product welding rod to melt, so that composite sheet is welded into tubulose.
Above-mentioned existing composite soft tube overlap joint welding procedure has the following disadvantages:
First using inside and outside heating component to the interior outside of overlapping the slot, it is necessary to be heated simultaneously so that overlap joint welding is set Standby complex structural designs, also, easily occur the uneven situation of heating in welding process, cause welding quality reduction, weldering Efficiency is connect to be restricted;
Second, composite hose sheet material carries out welding fabrication using overlapping mode, occurs in the outer wall of composite soft tube very bright Aobvious weld seam so that the outer wall of composite soft tube is difficult to 360 ° of pattern printings;
3rd, in lap joint process, the heat sealable material of above-mentioned composite sheet internal face and outside wall surface is usually that polyethylene is thin Film, but because polyethylene film has certain defect, such as transparency and mechanical strength are all poor, so that composite soft tube Further improvement there is technical bottleneck.
The content of the invention
The technical problems to be solved by the invention are:A kind of curtain coating type butt welding equipment of composite soft tube is provided.
Above-mentioned technical problem is solved, the technical solution adopted in the present invention is as follows:
The curtain coating type butt welding equipment of a kind of composite soft tube, for banding composite sheet to be welded into body, including core Rod, fixture, transmission mechanism and frame;Plug and fixture are respectively fixed on the machine frame, and plug is horizontally disposed and through fixture, is driven Mechanism can drive the banding composite sheet moved axially forward along plug so that when the banding composite sheet is by fixture Be wrapped in by the effect of fixture on plug, and the banding composite sheet left and right edge in the top position of plug Docking is formed along the axially extending abutment joint of plug, it is characterised in that:Described butt welding equipment also includes extruder and pressure Block;The top position of the plug is provided with the groove axially extended, the abutment joint rearmost end position of the banding composite sheet In the middle part of groove position rearward;Extruder is defeated from its discharging opening for polyethylene micelle to be heated at high temperature into after viscous state Go out, the discharging opening of extruder is arranged on above plug and is directed at the rearward end of the groove;Briquetting is pacified by pressure regulating mechanism In the frame, briquetting contradict on the abutment joint of the banding composite sheet, and briquetting rear end be located at it is described right The last end position of seam, front end exceed the leading section position of the groove, and pressure regulating mechanism can adjust briquetting to described The pressure of abutment joint.
In order to strengthen the smooth degree that viscous state polyethylene micelle flows in a groove, the side of being preferable to carry out of the present invention is used as Formula, described groove has semi-circular cross-section.
In order to ensure the abutment joint for the bonding banding composite sheet that viscous state polyethylene micelle can be consolidated, the present invention is used as Preferred embodiment, the total length of the groove is 10cm, wherein, the position of the groove correspondence abutment joint rearmost end Distance to rearward end and leading section is respectively 1cm and 9cm.
As the preferred embodiment of the present invention, the thickness of the groove is 0.5~0.6mm, and width is 1.5~2.0mm.
Abutment joint for the ease of strong viscous state polyethylene micelle adhesive tape shape composite sheet simultaneously improves bonding quality, as The preferred embodiment of the present invention, the left and right edge of the banding composite sheet is respectively equipped with 45 ° of chamferings.
As the preferred embodiment of the present invention, described fixture is provided with left chuck body, right chuck body and chucking power Governor motion, left chuck body and right chuck body have the arc surface shape clamping face being oppositely arranged respectively, and the plug is passed through Two arc surface shape clamping faces surround class tubular cavity, the banding composite sheet by during such tubular cavity by a left side The effect of chuck body and right chuck body and be wrapped on the plug;Chucking power governor motion can adjust left chuck body With active force of the right chuck body to banding composite sheet.
In order to avoid composite sheet influences left and right edge butt joint to form abutment joint by producing fold during fixture, as A modification of the present invention, described left chuck body and right chuck body be respectively provided with by rear to front gradually rise it is domatic Top surface.
As the preferred embodiment of the present invention, the work of the left chuck body and right chuck body to banding composite sheet It is firmly 1.6~2.5kgf.
As the preferred embodiment of the present invention, the briquetting to the pressure of the abutment joint of banding composite sheet for 3.5~ 4.5kgf。
As the preferred embodiment of the present invention, described extruder is added polyethylene micelle high temperature by following four sections of temperature Heat is into viscous state:First paragraph temperature is 180 DEG C~200 DEG C, second segment temperature is 210 DEG C~230 DEG C, the 3rd section of temperature is 280 DEG C~300 DEG C, the 4th section of temperature be 280 DEG C~300 DEG C.
Compared with prior art, the invention has the advantages that:
First, the present invention exports viscous state polyethylene micelle by extruder, and by briquetting and is arranged on plug Groove is combined viscous state polyethylene micelle with the abutment joint of banding composite sheet, and bonding forms butt welding seam, so as to realize Banding composite sheet is welded into body;
Because the present invention can realize the continuous supply of viscous state polyethylene micelle, therefore, banding composite sheet by extruder Continuously butt welding seam can be formed on the body that material is welded into, it is to avoid occur in the prior art using limited length Occur the weld seam node being located between two welding rods when finished product welding rod is welded, so that, welding institute is on the one hand enhanced into pipe The mechanical strength of body, on the other hand then ensures that tube surfaces do not weld gap, do not go out weld from the appearance so that body Surface can realize 360 ° of printings;
Come in the groove of plug to dock with banding composite sheet because the viscous state polyethylene micelle of the present invention is injected into Seam is combined, and suitable width and thickness can be obtained by the size of adjusting grooves as the viscous state polyethylene micelle of welding rod Degree, so that the polyethylene micelle after cooling down is located at internal face one reinforcing strip of formation of butt welding seaming position in body, so that The sufficiently high mechanical strength needed for body is reached, makes the shock resistance of body more excellent, it is ensured that body is in any feelings for twisting with the fingers pressure Weld seam will not split under condition.
Second, butt welding equipment of the invention is not required to set the heating group for being used for heating outside in seam in the prior art Part, therefore, the present invention have more simple device structure and highly efficient production efficiency compared to prior art.
In summary, the present invention can realize the continuous butt welding of banding composite sheet, and with welding body machinery Intensity height, non-welding surface seam gap, the advantage that equipment mechanism is simple, production efficiency is high.
Brief description of the drawings
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings:
Fig. 1 is the dimensional structure diagram of the butt welding equipment of the present invention;
The schematic diagram that Fig. 2 is welded for the left and right edge of composite sheet in abutment joint by polyethylene micelle.
Embodiment
As depicted in figs. 1 and 2, the curtain coating type butt welding equipment of composite soft tube of the invention, for by banding composite sheet Material 5 is welded into body, wherein, the left and right edge of banding composite sheet 5 is respectively equipped with 45 ° of chamferings.
The butt welding equipment of the present invention includes plug 1, fixture 2, extruder, briquetting 4, transmission mechanism and frame.Plug 1 It is respectively fixed on the machine frame with fixture 2;Fixture 2 is provided with left chuck body, right chuck body and chucking power governor motion, left fixture Body and right chuck body are respectively provided with the domatic top surface gradually risen by rear to front, and left chuck body and right fixture sheet Body has the arc surface shape clamping face being oppositely arranged respectively, and plug 1 surrounds class circle horizontal through two arc surface shape clamping faces Tubular cavity, also, the top position of plug 1 is provided with the groove 1a axially extended and with semi-circular cross-section;Transmission Mechanism can drive banding composite sheet 5 moved axially forward along plug 1 so that banding composite sheet 5 passes through class tubular chamber It is wrapped in during body by the effect of left chuck body and right chuck body on plug 1, and the left and right side of banding composite sheet 5 Edge docks to be formed along the axially extending abutment joint 5a of plug 1 in the top position of plug 1, and causes abutment joint 5a's last The middle part position rearward for holding 5b to be located at groove 1a.Chucking power governor motion can adjust left chuck body and right chuck body pair The active force of banding composite sheet 5.Extruder is defeated from its discharging opening 3 for polyethylene micelle to be heated at high temperature into after viscous state Go out, the discharging opening 3 of extruder is arranged on the top of plug 1 and alignment indentation 1a rearward end;Briquetting 4 is pacified by pressure regulating mechanism In frame, briquetting 4 is contradicted on the abutment joint 5a of banding composite sheet 5, and the rear end of briquetting 4 is located at abutment joint 5a's Rearmost end 5b positions, front end exceed groove 1a leading section position, and pressure regulating mechanism can adjust briquetting 4 to abutment joint 5a's Pressure.
Above-mentioned groove 1a total length is preferably 10cm, wherein, groove 1a correspondence abutment joint 5a rearmost ends 5b position is arrived Rearward end and the distance of leading section are respectively 1cm and 9cm.It is 0.5~0.6mm that groove 1a thickness, which is selected excellent, and it is 1.5 that width, which is selected excellent, ~2.0mm.It is 1.6~2.5kgf that left chuck body and right chuck body, which are selected the active force of banding composite sheet 5 excellent,.Briquetting 4 It is 3.5~4.5kgf that the abutment joint 5a of banding composite sheet 5 pressure, which is selected excellent,.Extruder select it is excellent will be poly- by following four sections of temperature Ethene micelle is heated at high temperature into viscous state:First paragraph temperature is 180 DEG C~200 DEG C, second segment temperature is 210 DEG C~230 DEG C, Three sections of temperature are 280 DEG C~300 DEG C, the 4th section of temperature is 280 DEG C~300 DEG C.
The operation principle of butt welding equipment of the present invention is:
The fore-and-aft direction of the butt welding equipment of the present invention as described above is fed to banding composite sheet 5 so that The parallel and described above fore-and-aft direction of the bearing of trend of banding composite sheet 5, and the front portion of banding composite sheet 5 is laid in folder The top surface of tool 2, docking starting point (can be realized by manual splice mode or other manner) are placed under briquetting 4;Pass through driver Structure drives banding composite sheet 5 along the moved axially forward of plug 1 so that banding composite sheet 5 by during fixture 2 by fixture 2 Effect and be wrapped on plug 1, and the left and right edge of banding composite sheet 5 docks to be formed in the top position of plug 1 Along the axially extending abutment joint 5a of plug 1;Referring to Fig. 2, because the continual polyethylene micelle by viscous state of extruder is noted Enter into the groove 1a of plug 1, and the left and right edge of banding composite sheet 5 i.e. compression block 4 when docking forms abutment joint 5a Pressing force and be pressed against on the groove 1a of plug 1 so that the polyethylene micelle 6 of viscous state penetrates into banding composite sheet 5 are located in abutment joint 5a internal face and abutment joint 5a, so that after the cooling of viscous state polyethylene micelle, banding composite sheet 5 left and right edge is bonded in abutment joint 5a positions by polyethylene micelle, and abutment joint 5a turns into butt weld, banding composite sheet 5 It is welded into body.
In order to verify the performance of patent composite soft tube of the present invention, 10 sample pipes tests such as table 1 below are taken respectively.
Table 1
Patent docking flexible pipe of the present invention and other hose technologies contrast as follows:
Illustrate that patent of the present invention is more superior than the Composite pipe properties that traditional extrusion and mitered technology are manufactured by data above.
The present invention is not limited to above-mentioned embodiment, according to the above, according to the ordinary technical knowledge of this area And customary means, under the premise of above-mentioned basic fundamental thought of the invention is not departed from, the present invention can also make other diversified forms Equivalent modifications, replace or change, all fall among protection scope of the present invention.

Claims (10)

1. the curtain coating type butt welding equipment of a kind of composite soft tube, for banding composite sheet (5) to be welded into body, including core Rod (1), fixture (2), transmission mechanism and frame;Plug (1) and fixture (2) are respectively fixed on the machine frame, and plug (1) is horizontally disposed And through fixture (2), transmission mechanism can drive the banding composite sheet (5) moved axially forward along plug (1) so that institute It is wrapped in when stating banding composite sheet (5) by fixture (2) by the effect of fixture (2) on plug (1), and the banding is multiple Dock to be formed along the axially extending abutment joint of plug (1) in the top position of plug (1) in the left and right edge for closing sheet material (5) (5a), it is characterised in that:Described butt welding equipment also includes extruder and briquetting (4);The top position of the plug (1) The groove (1a) axially extended is installed, abutment joint (5a) rearmost end (5b) of the banding composite sheet (5) is recessed positioned at this The middle part of groove (1a) position rearward;Extruder is defeated from its discharging opening (3) for polyethylene micelle to be heated at high temperature into after viscous state Go out, the discharging opening (3) of extruder is arranged on above plug (1) and is directed at the groove (1a) rearward end;Briquetting (4) passes through pressure Power governor motion is arranged in the frame, and briquetting (4) is contradicted on the abutment joint (5a) of the banding composite sheet (5), and And the rear end of briquetting (4) is located at rearmost end (5b) position of the abutment joint (5a), front end and exceedes the front end of the groove (1a) Portion position, pressure regulating mechanism can adjust pressure of the briquetting (4) to the abutment joint (5a).
2. curtain coating type butt welding equipment according to claim 1, it is characterised in that:Described groove (1a) has semicircle Shape cross section.
3. curtain coating type butt welding equipment according to claim 1, it is characterised in that:The total length of the groove (1a) is 10cm, wherein, the position of the groove (1a) correspondence abutment joint (5a) rearmost end (5b) to rearward end and leading section away from From respectively 1cm and 9cm.
4. curtain coating type butt welding equipment according to claim 3, it is characterised in that:The thickness of the groove (1a) is 0.5~0.6mm, width is 1.5~2.0mm.
5. curtain coating type butt welding equipment according to claim 1, it is characterised in that:The banding composite sheet (5) Left and right edge is respectively equipped with 45 ° of chamferings.
6. curtain coating type butt welding equipment according to claim 1, it is characterised in that:Described fixture (2) is provided with left folder Have body, right chuck body and chucking power governor motion, left chuck body and right chuck body have the circle being oppositely arranged respectively Arc surfaced clamping face, the plug (1) surrounds class tubular cavity through two arc surface shape clamping faces, and the banding is combined Sheet material (5) by the effect of left chuck body and right chuck body during such tubular cavity by being wrapped in the plug (1) On;Chucking power governor motion can adjust the active force of left chuck body and right chuck body to banding composite sheet (5).
7. curtain coating type butt welding equipment according to claim 6, it is characterised in that:Described left chuck body and right folder Tool body is respectively provided with the domatic top surface gradually risen by rear to front.
8. curtain coating type butt welding equipment according to claim 6, it is characterised in that:The left chuck body and right fixture Body is 1.6~2.5kgf to the active force of banding composite sheet (5).
9. curtain coating type butt welding equipment according to claim 1, it is characterised in that:The briquetting (4) is compound to banding The pressure of the abutment joint (5a) of sheet material (5) is 3.5~4.5kgf.
10. curtain coating type butt welding equipment according to claim 1, it is characterised in that:Described extruder presses following four Polyethylene micelle is heated at high temperature into viscous state by Duan Wendu:First paragraph temperature is 180 DEG C~200 DEG C, second segment temperature is 210 DEG C ~230 DEG C, the 3rd section of temperature be 280 DEG C~300 DEG C, the 4th section of temperature be 280 DEG C~300 DEG C.
CN201510271102.1A 2015-04-30 2015-05-25 A kind of curtain coating type butt welding equipment of composite soft tube Active CN104943160B (en)

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CN201510214277 2015-04-30
CN2015102142779 2015-04-30
CN201510271102.1A CN104943160B (en) 2015-04-30 2015-05-25 A kind of curtain coating type butt welding equipment of composite soft tube

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CN201520342813.9U Withdrawn - After Issue CN204773584U (en) 2015-04-30 2015-05-25 Curtain coating type butt joint welding equipment of compound hose

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CN104943160B (en) * 2015-04-30 2017-07-28 广州瑞远新材料股份有限公司 A kind of curtain coating type butt welding equipment of composite soft tube
CN107042637B (en) * 2017-01-19 2023-02-14 广东鑫球新材料科技有限公司 Automatic cotton core rod production equipment
CN111683804B (en) * 2018-03-02 2023-01-03 陶氏环球技术有限责任公司 Method of molding tubular composite structures
CN111099140A (en) * 2019-12-16 2020-05-05 中山市德宇自动化科技有限公司 Hose manufacturing method and hose manufactured by using same
CN114131911A (en) * 2021-11-22 2022-03-04 江苏奥尼韦尔自动化科技有限公司 Automatic production equipment for polytetrafluoroethylene pipeline
CN114290654B (en) * 2022-01-12 2022-07-12 宁波柯翔汽车部件有限公司 Automatic sleeve rolling device

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* Cited by examiner, † Cited by third party
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JPS5859065A (en) * 1981-10-01 1983-04-07 Sumitomo Electric Ind Ltd Manufacture of laminate pipe
EP1905570A1 (en) * 2006-09-28 2008-04-02 Aisapack Holding SA Process and apparatus for internal welding of plastic tubes
JP5650736B2 (en) * 2009-07-31 2015-01-07 アイサパック・ホールディング・ソシエテ・アノニム Method and device for internally welding plastic tubes
EP2502725B1 (en) * 2011-03-24 2015-01-07 PackSys Global (Switzerland) Ltd. Device and method for manufacturing tubular bodies
CN203318915U (en) * 2013-05-10 2013-12-04 广州瑞远塑料制品有限公司 Butt-joint-type composite soft pipe
CN104943160B (en) * 2015-04-30 2017-07-28 广州瑞远新材料股份有限公司 A kind of curtain coating type butt welding equipment of composite soft tube

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CN104943160A (en) 2015-09-30

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