CN101195272A - Plastics pipe interface male thread shaping technique and equipment - Google Patents
Plastics pipe interface male thread shaping technique and equipment Download PDFInfo
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- CN101195272A CN101195272A CNA2008100592259A CN200810059225A CN101195272A CN 101195272 A CN101195272 A CN 101195272A CN A2008100592259 A CNA2008100592259 A CN A2008100592259A CN 200810059225 A CN200810059225 A CN 200810059225A CN 101195272 A CN101195272 A CN 101195272A
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Abstract
Provided are a molding process of external threads of a connector of plastic pipes and equipment, which comprise procedures of heating a pipe orifice, fixing, extruding and taking out work-pieces. In the procedure of heating the pipe orifice, the pipe orifice is pre-heated in a heater which is split with a thread compressor and then is sent in a molding die of the thread compressor. In the procedure of extruding, initially the pipe is axially extruded via a moving plane, then an extrusive rod is inserted in an inner cavity of the plastic pipe to radically extrude the plastic pipe, and external threads are molded via the extruding of the molding die. Because the processing equipment separates the heating of the pipe orifice and the molding of the threads, particularly the procedure of axially extruding of the plastic pipe is added, firstly the pipe wall of the connector portion of to-be-molded external threads is thickened, and then the threads are molded via radically extruding. Obviously wall thickness of the pipe with the external tread position molded via the method is thicker than the wall thickness of original pipe, further the thickness can be controlled according to situations, thereby realizing the purposes of high work efficiency and controllability of the wall thickness of the thread connector and being favorable for substantially reducing the manufacture costs.
Description
[technical field]
The invention belongs to a kind of screw-thread forming process and equipment thereof, especially relate to a kind of plastics pipe interface external thread hot extrusion molding technology and special equipment
[background technology]
Plastic pipe (hereinafter to be referred as moulding pipe) each other or with other accessory between adopt be threaded, fixedly be the most frequently used method.At present, moulding pipe interface thread moulding process commonly used mainly contains machine cut and does not have two kinds of cutting extruding thermoplastic shapings.Cutting forming cuts screw thread by screw die or lathe tool and gets final product; Forming without stock removel technology is to use and to mould the intrados of pipe tubing axial perpendicular motion threaded, and the shaping mould of band heating function, and the outer surface of moulding tube end (being the interface position) is pushed thermoplastic shaping and finishes.
Do not have cutting extruding thermoplastic shaping technology for tube wall thicker mould pipe, threading any problem can not occur on outer pipe wall, and for the mould pipe of tube wall with regard to approaching itself, want threading again, because processing rear thread place tube wall is attenuate more, and the responsive phenomenon of well-known breach can make mouth of pipe intensity descend and can't use.Such situation is often arranged: for entire product in the reality, as long as accessory mould tube wall have certain wall thickness just can adapted, but, because prior art can make the tube wall attenuation of threaded portion when the moulding external screw thread, and have to select for use the thicker pipe of moulding of tube wall to substitute, to improve joint strength, pipe selection waste problem of resource has just appearred moulding thus.
Number of patent application is that 991121481 " screw-thread forming process for plastic water pipe " discloses a kind of nothing cutting extruding thermoplastic shaping technology.Its technical process is described as follows by Fig. 1: at first will mould among the threaded mold 4a after unlatching is sent in the end of managing 2a, heating when carrying out 1 minute, heat form is realized by heating collar 5a, temperature is controlled at 130-150 ℃, selected according to the material softening degree, to mould tube grip with anchor clamps 1a before inserting axle 3a fixes, then with threaded mold 4a closure, in threaded mold 4a closure, screw in spindle specially 3a, make the end expansion of moulding pipe, mould the peripheral plastic of pipe and squeezed into equably in the screw thread of mould.Extruding finishes, and the heating that pauses was cooled off after 2-3 minute, unclamped threaded mold 4a, withdrawed from spindle specially 3a, unclamped anchor clamps 1a, and whole extraction the out of axle 3a finished whole forming process.As seen above-mentioned: the external screw thread of moulding the interface tube position is to realize under the radial compression of axle 3a, for this reason, the pipe thickness at this position is that footpath to the thickness between the tube wall internal diameter will inevitably tend to thin typeization at the bottom of the external screw thread, has reduced joint strength, thereby has been unfavorable for the thin type selection.
[summary of the invention]
For solving the problems referred to above that prior art exists, the present invention aims to provide a kind of plastics pipe interface male thread shaping technique, utilize this technological forming external screw thread, screw thread position tube wall thickness not only can attenuate, can also thicken, thereby increase the tubing joint strength, help product and select for use the thin type that adapts with it to mould pipe, reach and save raw-material purpose; Another object of the present invention provides a kind of special equipment that is applicable to above-mentioned plastics pipe interface male thread shaping technique, and the production efficiency height.
For achieving the above object, the technical scheme that adopts is: this plastics pipe interface male thread shaping technique comprises that mouth of pipe heating, fixing, extruding and workpiece take out operation, it is characterized in that: in the mouth of pipe heating process, will mould earlier the pipe mouth of pipe one with the heater of screw thread press split in send into again in the shaping mould of screw thread press after preheating; In the extrusion process,, stretch into by pressure ram again and mould tube cavity and make radial compression, through shaping mould extrusion modling external screw thread earlier by a plane of movement axial compression tubing.Because this technology is carried out mouth of pipe heating, particularly increased and moulded tubular axis to extrusion process with the thread forming split, externally threaded interface to be formed position tube wall is thickened, then, carry out radial compression moulding screw thread again, obvious tube wall thickness with external screw thread position by this method moulding, that is: the footpath thickens than former tube wall thickness to the thickness between the pipe internal diameter at the bottom of the external screw thread, and thickness can look feelings and control, thereby has realized purpose.
Aforesaid moulding process, its main points are: the heating-up temperature of moulding the pipe mouth of pipe is moulded the following 5-40 of tube material melting temperature ℃ for this.
The equipment that uses of moulding process as mentioned above, constitute by moulding pipe mouth of pipe heater and screw thread press two parts, the screw thread press comprises clamper, shaping mould and the pressure ram that can make axially reciprocating along the shaping mould passage, it is characterized in that: heater and the split of screw thread press, separate component each other; The screw thread press comprises that also one can make the axial compression cover of axially reciprocating, and the front end of axial compression cover has an extruding working face.
Aforesaid equipment is characterized in that: moulding pipe mouth of pipe heater is the controlled metallic plate of a deblocking temperature, and metallic plate is skewed setting, three sides of metallic plate be provided with vertically to breast board.
Aforesaid equipment is characterized in that: axial compression is set on the pressure ram periphery, has the whole or two kinds of duties that relatively move of axial work between the two, and the extruding working face is arranged on the axial compression cover foremost.
Aforesaid equipment is characterized in that: shaping mould is made up of the matrix of four splits, is provided with elastomer between matrix and the matrix, has a shaping mold cavity that is used to admit workpiece in the shaping mould, and the ring wall of shaping mold cavity is provided with internal thread.
Aforesaid equipment, it is characterized in that: screw thread press impeller-hub to extruded sleeve, pressure ram reciprocating be the secondary cam structure, the secondary cam structure comprises one-level cam surface, secondary cam surface, the one-level cam surface offsets with axial compression cover afterbody, and secondary cam surface and pressure ram afterbody offset.
Aforesaid equipment is characterized in that: axial compression puts and is provided with a distance of axial displacement adjusting device.
Beneficial effect: compared with prior art, in the Processes and apparatus of the present invention owing to increased axial compression, make and mould interface tube position tube wall and thicken earlier and carry out radial compression, thread forming again, and can determine the degree that tube wall thickens according to actual needs, like this for tube wall thin mould pipe, if meeting as accessory, uses its wall thickness, just can utilize this technology to come the moulding external screw thread and the problem of needn't worry breach sensitivity and interface thread processing back wall thickness reduction, thereby reach the purpose of saving pipe material.Mouth of pipe heating helps increasing work efficiency after carrying out with the thread forming split.
For sharpening understanding, also the invention will be further described in conjunction with the accompanying drawings below by embodiment.
[description of drawings]
Fig. 1 is a moulding process key diagram in the known technology.
Fig. 2 is the plan structure schematic diagram of one embodiment of the invention screw thread press.
Fig. 3 be the level of Fig. 2 to the sectional structure schematic diagram, but omitted parts such as decelerator, linkage pull rod, extruding block set overcoat, then, the parts in the frame of broken lines of A among the figure have been done clockwise 90 degree rotations.
Fig. 4 is the local figure of the plan structure at Fig. 2 cam, shaft coupling position.
Fig. 5 is that the K of clamping upper plate and clamping lower plate among Fig. 2 is to structural representation.
Fig. 6 is the perspective view of a formation of lots matrix among Fig. 2.
Fig. 7 is the perspective view of heater.
Sequence number is represented respectively among the figure:
Anchor clamps 1a moulds pipe 2a, axle 3a, threaded mold 4a, heating Fig. 5 a.Cam 10, one-level cam surface 101, secondary cam surface 102, camshaft 103, camshaft axle bed 104, set bolt 105.Extruding block set overcoat 20, extruded sleeve 201, extruded sleeve spring 202, compressive plane 203, extruding block set 204, extruding block set afterbody 2041 is regulated bolt block 205, regulates bolt 2051.Linkage pull rod 30, eccentric wheel 301, pull bar 302, pull bar hold-down nut 3021, pull bar 303, pull bar hold-down nut 3031.Pressure ram 40, pressure ram spring 401, bar spring base 402, pressure ram afterbody 403, the field of conjugate action 404.Shaping mould top board 501, shaping mould base plate 502, shaping mould 503, elastomer installing hole 5031, fixing hole 5032, internal thread 5033, annular inner wall 5034, axial location groove 3035, framework panel 504.Clamping upper plate 60, clamping lower plate 601, charging hole 602, feeding-passage 6022, folding cam 603, folding cam head 6031, pull plate 604, mould seat 605.Decelerator 70, reducer output shaft 701, reducer input shaft 702, reducer pulley 703.Shaft coupling 80.Base 90, breast board 901 is moulded pipe 902, feet 903.
[specific embodiment]
Moulding pipe production with the suction powder of adapted in the hand-held fire extinguisher below is example, and tubing interface male thread shaping technique of the present invention and production equipment special situation thereof are described.
Referring to Fig. 2, and in conjunction with Fig. 3, Fig. 4.Fig. 2 is the plan structure schematic diagram of present embodiment screw thread press, mainly divides three parts, and upper horizontal is to the power section that is that is provided with, and being with respect to power section is working portion and linkage pull rod part to what be provided with vertically.
In conjunction with Fig. 4, the camshaft 103 of power section is shelved on the camshaft axle bed 104 through bearing, camshaft axle bed 104 by bolted on framework panel 504.Camshaft 103 left sides connect with the eccentric wheel 301 of linkage pull rod 30 front ends, the right side connects with shaft coupling 80, shaft coupling 80 right-hand members connect with reducer output shaft 701, the reducer input shaft 702 of decelerator 70 connects with reducer pulley 703, and reducer pulley 703 connects with the motor output shaft belt pulley of below through belt.Cam 10 is installed on the camshaft 103, and cam 10 has the one-level cam surface 101 that rotatablely moves, and secondary cam surface 102, firsts and seconds cam surface are successively to the movement parts transferring power of working portion.
Referring to Fig. 2 and in conjunction with Fig. 3, working portion is arranged on the framework panel 504 of cam 10 rotation directions, and movement parts is pressure ram 40, extruding block set 204 and extruded sleeve 201.Relative position is a center line with the axial line of pressure ram 40, from beginning by near to pressure ram 40, shaping mould 503 and clamper axially are set far successively near cam 10.Pressure ram afterbody 403 is adjacent with cam 10, and its secondary cam surface 102 can be exerted pressure to pressure ram afterbody 403 when cam 10 rotated, and promotes pressure ram 40 and does axially-movable.Radially: the periphery of pressure ram 40 nearly cams 10 is provided with extruded sleeve seat 204 and extruding block set overcoat 20, and pressure ram 40 peripheries in extruding block set 204 the place aheads are provided with extruded sleeve 201.Pressure ram 40 and extruded sleeve 201 are two main workpieces, and both are nested with together, and pressure ram 40 ends grow the end face of extruded sleeve 201, are the round end shape.The front end of extruded sleeve 201 is provided with compressive plane 203.Pressure ram 40 is an integral stem, the rear end face of extruded sleeve 201 pastes mutually with extruding block set 204 front end faces, 2041 one-level cam surfaces 101 with cam 10 of extruding block set afterbody are adjacent, its one-level cam surface 101 can be exerted pressure to extruding block set afterbody 2041 when cam 10 rotated, and promotion extruding block set 204, extruded sleeve 201 are done axially-movable.Extruded sleeve spring 202 and pressure ram spring 401 play reset response respectively.
The effect of third part linkage pull rod 30 is to use the power of camshaft 103, reaches shaping mould top board 501, the shaping mould base plate 502 of shaping mould base in the control working portion, and the clamping upper plate 60 of clamper, the folding between the clamping lower plate 601.Eccentric wheel 301 makes whole linkage pull rod 30 do rotation synchronously under the drive of camshaft 103 with after camshaft 103 connects, and makes also swing thereupon of folding cam head 6031.In conjunction with Fig. 3, between framework panel 504 and pull plate 604, be provided with mould open/close cam 603, when folding cam head 6031 when linkage pull rod 30 drives lower swings, because framework panel 504 is in stationary state, therefore, by two pairs of mould pull bars 302, the traction of pull bar 303, and be arranged between shaping mould top board 501 and the shaping mould base plate 502, clamping upper plate 60, under the spring action between the clamping lower plate 601, shaping mould top board 501 and clamping upper plate 60 occurrence positions change, when mould open/close cam 603 was in level, spring force made shaping mould top board 501 and clamping upper plate 60 be in opening (die opening state), when mould open/close cam 603 swings 90 degree are in plumbness, shaping mould top board 501 and clamping upper plate 60 move downward, and are matched moulds and clamp position.
Referring to Fig. 6, and in conjunction with Fig. 2.As required, shaping mould 503 is made up of the matrix (Fig. 6 represents a matrix) of four splits, every matrix is 1/4th tubuloses, has annular inner wall 5034, fixing hole 5032 (in fact as long as on a matrix of bottom, fixing hole is set, so that be located on shaping mould base plate 502), part annular inner wall 5034 is provided with internal thread 5033, the internal thread of four matrixs forms a die cavity, and die cavity is used for admitting moulds pipe port, moulding screw thread.Combined through elastomer installing hole 503 by elastomer (for example spring or polyurethane elastomer) between matrix and the matrix, when shaping mould top board 501 was opened, elastomer separated matrix, reached die sinking and can make the effect that pipe takes out of moulding.
Referring to Fig. 7, the structure of heater is very simple, mainly comprises a skewed base plate that is arranged on the base 90, and the temperature of this base plate makes temperature meet forming temperature as long as can control to adjust.For easy to operate, during actual fabrication, allow the temperature of base plate form a gradient, raise gradually from the bottom up, extract from the below earlier when getting material and mould pipe 902.Base plate is supported by feet 903, and the upper side of base plate opens wide with convenient reinforced, and its excess-three side is provided with breast board 901, handled easily.Base areas reaches quantity-produced and requires to be as the criterion with the pipe of moulding that can make heating.
Referring to Fig. 3, whole technical process is as follows: heater will be moulded the pipe mouth of pipe and be heated to suitable forming temperature, under shaping mould top board 501 and clamping upper plate 60 openings, the pipe of moulding after the heating is sent into feeding-passage 6022 through charging hole 602 (referring to Fig. 5), and push up mutually with the compressive plane 203 of extruded sleeve 201.When shaping mould top board 501, clamping upper plate 60 move downward with mould pipe clamp tight after, one-level cam surface 101 first impeller-hubs are to extruding block set 204, axial compression cover 201 is along moulding tubular axis to moving, compressive plane 203 will be moulded the softening part of pipe and be expressed to suitable thickness (extruded length can be regulated), then, secondary cam surface 102 promotes internal diameter pressure ram 40 move ahead (external diameter of internal diameter pressure ram 40 with mould the desired internal diameter in pipe extruding back identical) again, radially make and mould the outwards extruding and enrich the die cavity of shaping mould 503 of internal diameter that pipe dwindles, thereby not only make the port thread forming but also make the port internal diameter consistent with desired size.After the I and II cam surface of cam 10 turned over, the reset force of extruded sleeve spring 202 and pressure ram spring 401 resetted pressure ram 40, extruded sleeve 201.Extraction is moulded and is managed and send into to be processed moulding pipe and continue the next work period.Because of whole screw thread press die all is cold, thus when the port thread forming cooling forming.Camshaft 103 design speeds are 12-20 circle/per minute, finish the about 3-5 of one-period second, and the one man operation of this equipment per hour can be produced hickey 600-800.
Heater and the split of screw thread press two parts, its benefit: the one, moulding pipe has one to preheat process before 902 moulding, make the interior batch of heater mould pipe and be in heating member state to be formed all the time, help like this enhancing productivity, the 2nd, guarantee that mould is in the state of cooling all the time, to improve the operating efficiency of screw thread press.
Referring to Fig. 5, regulate and to mould length that pipe is extruded and reach the purpose of regulating the interface thickness after the extruding and regulate bolt 2051 by one and realize.Regulate the front end that bolt block 205 is fixed on extruding block set 204, regulate the front end that bolt 2051 rear end faces withstand on extruding block set overcoat 20, control the move distance of extruding block set 204, reach the purpose of adjusting.
The foregoing description is a purpose with explanation flesh and blood of the present invention just, and in fact, parts such as shaping mould, power section and linkage pull rod all have a lot of modification, and these are also because of including the protection domain of patent of the present invention in.
Claims (8)
1. plastics pipe interface male thread shaping technique, comprise that mouth of pipe heating, fixing, extruding and workpiece take out operation, it is characterized in that: in the mouth of pipe heating process, will mould earlier the pipe mouth of pipe one with the heater of screw thread press split in send into again in the shaping mould of screw thread press after preheating; In the extrusion process,, stretch into by pressure ram again and mould tube cavity and make radial compression, through shaping mould extrusion modling external screw thread earlier by a plane of movement axial compression tubing.
2. moulding process as claimed in claim 1 is characterized in that: the heating-up temperature of moulding the pipe mouth of pipe is moulded the following 5-40 of tube material melting temperature ℃ for this.
3. equipment that described moulding process uses, it is characterized in that: constitute by moulding pipe mouth of pipe heater and screw thread press two parts, the screw thread press comprises clamper, shaping mould (503) and the pressure ram (40) that can make axially reciprocating along the shaping mould passage, it is characterized in that: heater and the split of screw thread press, separate component each other; The screw thread press comprises that also one can make the axial compression cover (201) of axially reciprocating, and the front end of axial compression cover (201) has a work compressive plane (203).
4. equipment as claimed in claim 3 is characterized in that: moulding pipe mouth of pipe heater is the controlled metallic plate of a deblocking temperature, and metallic plate is skewed setting, three sides of metallic plate be provided with vertically to breast board (901).
5. equipment as claimed in claim 3, it is characterized in that: axial compression cover (201) is arranged on pressure ram (40) periphery, have the whole or two kinds of duties that relatively move of axial work between the two, compressive plane (203) is arranged on axial compression cover (201) foremost.
6. equipment as claimed in claim 3, it is characterized in that: shaping mould (503) is made up of the matrix of four splits, be provided with elastomer between matrix and the matrix, have a shaping mold cavity that is used to admit workpiece in the shaping mould, the ring wall of shaping mold cavity is provided with internal thread (5033).
7. equipment as claimed in claim 3, it is characterized in that: screw thread press impeller-hub to extruded sleeve (201), pressure ram (40) reciprocating be the secondary cam structure, the secondary cam structure comprises one-level cam surface (101), secondary cam surface (102), one-level cam surface (101) can offset with axial compression cover afterbody (2041), and secondary cam surface (102) can offset with pressure ram afterbody (403).
8. equipment as claimed in claim 3 is characterized in that: the screw thread press is provided with the shift length adjusting device of an axial compression cover (201).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100592259A CN101195272A (en) | 2008-01-08 | 2008-01-08 | Plastics pipe interface male thread shaping technique and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100592259A CN101195272A (en) | 2008-01-08 | 2008-01-08 | Plastics pipe interface male thread shaping technique and equipment |
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| CN101195272A true CN101195272A (en) | 2008-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100592259A Pending CN101195272A (en) | 2008-01-08 | 2008-01-08 | Plastics pipe interface male thread shaping technique and equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101725608B (en) * | 2009-12-28 | 2012-10-17 | 重庆红岢电力绝缘配件有限责任公司 | Insulating fastening bolt and manufacturing method thereof |
| CN110076985A (en) * | 2019-05-31 | 2019-08-02 | 于鹏青 | A kind of effective external screw thread hot extrusion molding machine of fire extinguisher siphon |
| CN114683563A (en) * | 2020-12-25 | 2022-07-01 | 中国石油化工股份有限公司 | Machining and mounting method of oil production pipe joint and oil production pipe joint |
-
2008
- 2008-01-08 CN CNA2008100592259A patent/CN101195272A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101725608B (en) * | 2009-12-28 | 2012-10-17 | 重庆红岢电力绝缘配件有限责任公司 | Insulating fastening bolt and manufacturing method thereof |
| CN110076985A (en) * | 2019-05-31 | 2019-08-02 | 于鹏青 | A kind of effective external screw thread hot extrusion molding machine of fire extinguisher siphon |
| CN114683563A (en) * | 2020-12-25 | 2022-07-01 | 中国石油化工股份有限公司 | Machining and mounting method of oil production pipe joint and oil production pipe joint |
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