CN209534106U - Extrusion molding mould of polyethylene outer protective pipe of polyurethane heat-insulation bend pipe - Google Patents

Abstract

The utility model discloses a kind of extrusion molding moulds of polyethylene outer protective pipe of polyurethane heat-insulation bend pipe, including the Upper Die-sleeve and lower die-sleeve for being oppositely arranged connection up and down and being arc-shaped, the Upper Die-sleeve is closed at one end, including being located at first outer casing in outside and positioned at the first inner casing of inside, the lower die-sleeve is identical with Upper Die-sleeve closed at one end, including being located at second outer casing in outside and positioned at the second inner casing of inside, the opposite face of first outer casing and the second outer casing is bonded the outer sleeve to form arc, the opposite face of first inner casing and the second inner casing is bonded the inner sleeve to form arc, the forming cavity of polyethylene outer protective pipe is formed between outer sleeve and inner sleeve, the feed opening that polyethylene raw material is squeezed into forming cavity is provided on first outer casing and/or the second outer casing.The utility model can be by extrusion molding of polyethylene outer protective pipe, and outer jacket structure intensity is high, and anti-fracture performance is good.

Description

Extrusion molding mould of polyethylene outer protective pipe of polyurethane heat-insulation bend pipe

Technical field

The utility model relates to the processing technique fields of utilidor, more particularly, to a kind of the poly- of polyurethane heat-insulation bend pipe Extrusion molding mould of ethylene outer protection tube.

Background technique

It is sent out using high function polyether polyol combination material and polymethine polyphenyl polyisocyanate as raw material through chemical reaction It steeps.Polyurethane thermal pipe be used for the various pipelines of indoor and outdoor, central heating pipe, central air-conditioning pipe polyurethane thermal pipe, The heat preservation of the industrial pipelines such as chemical industry, medicine, prepressing reserving works.Polyurethane foamed thermal-insulating pipe is absurd fantastic from the '30s polyurethane synthetic material Since life, rapidly developed as a kind of excellent heat-insulating material always, application range is also more and more extensive, more Due to its easy construction, energy-saving anti-corrosive significant effect and be heavily used in the various pipes such as various heat supplies, refrigeration, oil transportation, defeated vapour Road.

Polyurethane thermal pipe chief component: one, protective shell, using high density polyethylene (HDPE) or glass reinforced plastic；Two, it keeps the temperature Layer, using rigid polyurethane foam；Three, working steel tube, according to the technical requirements of pumped (conveying) medium be respectively adopted seamed steel pipe, Seamless steel pipe, double submerged arc helix welding steel pipe.

Wherein, polyurethane thermal pipe includes heat-preserving bent pipe, is mainly used to the steering of heat preservation straight tube, generally mating with utilidor It uses, is according to, for compensating action, the pipe fitting part of heat-preserving bent pipe is usually first right in processing when heat insulating work pipeline designs Straight polyethylene outer protective pipe carries out setting-out blanking, cutting, again with soldering appliance or is manually welded, formation bend pipe polyethylene Outer protection tube, such processing method efficiency is very slow, and manual welding is of low quality, and bend pipe outer jacket structure intensity is low, easily Fracture.

Utility model content

The purpose of the utility model is to provide a kind of extrusion dies of polyethylene outer protective pipe of polyurethane heat-insulation bend pipe Tool, can be by extrusion molding of polyethylene outer protective pipe, and outer jacket structure intensity is high, and anti-fracture performance is good.

The above-mentioned purpose of utility model of the utility model has the technical scheme that

A kind of extrusion molding mould of polyethylene outer protective pipe of polyurethane heat-insulation bend pipe, including it is oppositely arranged connection up and down And the Upper Die-sleeve and lower die-sleeve being arc-shaped, the Upper Die-sleeve is closed at one end, including being located at first outer casing in outside and being located at First inner casing of inside, the lower die-sleeve is identical with Upper Die-sleeve closed at one end, including be located at outside the second outer casing and The opposite face of the second inner casing positioned inside, first outer casing and the second outer casing is bonded the outer sleeve to form arc, The opposite face of first inner casing and the second inner casing is bonded the inner sleeve to form arc, is formed between outer sleeve and inner sleeve The forming cavity of polyethylene outer protective pipe is provided with to forming cavity on first outer casing and/or the second outer casing and squeezes into polyethylene The feed opening of raw material.

By using above-mentioned technical proposal, Upper Die-sleeve is mounted on lower die-sleeve, and the end part aligning of two die sleeves is connected It connects, curved cylindrical structure, the i.e. forming cavity of polyethylene outer protective pipe can be formed in two die sleeves, and set on the outer casing of die sleeve It is equipped with the feed opening for squeezing into polyethylene raw material, the polyethylene raw material that Rubber Extruder squeezes out is injected by forming cavity by feed opening Interior, polyethylene raw material can flow in forming cavity, gradually fill full forming cavity, form integrally formed outer protective polyethylene after cooling Pipe.

The utility model is further arranged to: the closed end of the Upper Die-sleeve is provided with semicircular upper end cover, it is described on End cap downside is provided with limit plate far from the side in forming cavity, and the closed end of the lower die-sleeve is provided with semicircular lower end Lid, the lower cover upper side are provided with limiting slot far from the side in forming cavity, and the upper end cover is opposite with lower cover to be bonded, The limit plate is inserted into limiting slot.

By using above-mentioned technical proposal, the end of two die sleeves is closed by end cap, and setting is cross-linked on end cap Limit plate and limiting slot increase contact area of two die sleeves at end cap, can efficiently reduce the leakage of polyethylene raw material, When limit plate is abutted in limiting slot simultaneously, two die sleeve accurate positionings facilitate the installation of two die sleeves to position.

The utility model is further arranged to: being provided with wild card along its length on the inside of the lower end surface of first outer casing The upper surface inside of plate, second outer casing is provided with the exterior bayonet slot opposite with outer card plate.

By using above-mentioned technical proposal, the contact surface of two outer casings is connected by outer card plate with exterior bayonet slot, increases by two Contact area of a die sleeve at outer casing, further enhances the airtightness of forming cavity from outside, can be effectively prevented from poly- Ethylene raw is stuck on the inside of exterior bayonet slot to leakage on the outside of die sleeve, outer card plate, and two die sleeve accurate positionings facilitate the peace of two die sleeves Set position.

The utility model is further arranged to: being provided with interior card along its length on the outside of the lower end surface of first inner casing The upper surface outside of plate, second inner casing is provided with the inner card cage opposite with interior snap-gauge.

By using above-mentioned technical proposal, the contact surface of two inner casings is connected by interior snap-gauge with inner card cage, increases by two Contact area of a die sleeve at inner casing, further enhances the airtightness of forming cavity from inside, can be effectively prevented from poly- Ethylene raw is stuck on the outside of inner card cage to leakage on the inside of die sleeve, interior snap-gauge, two die sleeve accurate positionings, facilitates two die sleeves installations Positioning.

The utility model is further arranged to: the Upper Die-sleeve open end opposite with closed end is removably connected with closing The upper sealing plate of forming cavity, the lower die-sleeve open end opposite with closed end are removably connected with the lower sealing plate for closing forming cavity.

By using above-mentioned technical proposal, the open end of two die sleeves is closed by dismountable sealing plate, and sealing plate is detachable Get off, after polyethylene outer protective pipe cooling and shaping, polyethylene outer protective pipe can be pulled out from open end, can will be protected at this time Working steel tube on the inside of warm bend pipe is connected on inner casing, with the extraction of polyethylene outer protective pipe, while being set in work steel Then Guan Shang facilitates and carries out polyurethane foam filling between the two tubes.

The utility model is further arranged to: the upper sealing plate is semi-circular plate, and plate face is close to the position of inner ring and outer ring Set it is circumferentially arranged have a connecting hole, the upper sealing plate passes through in the bolt and the first outer casing and first that are threaded through in connecting hole Backplate connection.

By using above-mentioned technical proposal, upper sealing plate is semi-circular, can preferably with the first outer casing and the first inner casing Fitting is closed forming cavity, is connected by screw bolts, convenient disassembly.

The utility model is further arranged to: lower sealing plate setting identical and symmetrical above and below with upper sealing plate structure, described Lower sealing plate is connect by bolt with the second outer casing and the second inner casing.

By using above-mentioned technical proposal, lower sealing plate is also semi-circular, can preferably be protected in the second outer casing and second Plate fitting cooperates closing forming cavity with upper sealing plate, enhances the obturation effect of entire mold.

The utility model is further arranged to: being provided with support frame on the inner wall of the lower die-sleeve, is set on support frame as described above Be equipped with the sliding rail along the setting of lower die-sleeve length direction, the sliding rail be in coaxial arc-shaped of lower die-sleeve, upper part is slidably connected There are multiple idler wheels, the idler wheel upper end is fixed on the inner wall of Upper Die-sleeve, is slidably mounted on Upper Die-sleeve on lower die-sleeve along sliding rail.

By using above-mentioned technical proposal, support frame and sliding rail are set in lower die-sleeve inner wall, idler wheel is set on sliding rail, is being incited somebody to action When Upper Die-sleeve and lower die-sleeve are installed, Upper Die-sleeve is placed on the slide rail, snap-gauge is stuck in the first outer card plate of Upper Die-sleeve and first The second exterior bayonet slot and the second inner card cage of lower die-sleeve, then move Upper Die-sleeve along the circumferential direction of lower die-sleeve, and two die sleeves are installed Simultaneously positioned, reduce the later period repositioning and caused by the time waste.

In conclusion the advantageous effects of the utility model are as follows:

1, extrusion die lamps structure of the polyethylene outer protective pipe of the utility model is simple, can be by two die sleeves Interior injection polyethylene raw material, it will be able to which the polyethylene outer protective pipe structural strength of one-pass molding polyethylene outer protective pipe, generation is uniform, no In the presence of connection weak spot, break resistance is high.

2, the interior outside of two die sleeves and the link position at both ends are all provided with and are set to effective sealing, good seal performance, effectively Ground reduces the leakage of polyethylene raw material, reduces waste, saves material.

3, the utility model mold during installation, by three reorientations of outer casing, inner casing and end cap, improves two The installation effectiveness of die sleeve keeps the shape of forming cavity more regular, and molding outer protective polyethylene tube shape is more regular, better quality.

4, Upper Die-sleeve during installation, is cooperated by sliding rail and idler wheel, does not need lifting or more people carry, it is only necessary to one to two People pushes Upper Die-sleeve, reduces workload when installation.

5, polyethylene outer protective pipe after formation, can be pulled out in the open end of die sleeve, at this time can be by heat-preserving bent pipe The working steel tube of inside is connected on inner casing, with the extraction of polyethylene outer protective pipe, while being set on working steel tube, so Facilitate afterwards and carries out polyurethane foam filling between the two tubes.

Detailed description of the invention

Fig. 1 is the mounting structure schematic diagram of the utility model mold.

Fig. 2 is the structural schematic diagram of Upper Die-sleeve and lower die-sleeve in the utility model.

Fig. 3 is the closed end structural schematic diagram of Upper Die-sleeve and lower die-sleeve in the utility model.

Fig. 4 is the open ended structure schematic diagram of Upper Die-sleeve and lower die-sleeve in the utility model.

Fig. 5 is the connection structure cross-sectional view of Upper Die-sleeve and lower die-sleeve in the utility model.

Fig. 6 is the installation condition schematic diagram of Upper Die-sleeve and lower die-sleeve in the utility model.

In figure, 1, Upper Die-sleeve；11, the first outer casing；12, the first inner casing；13, upper end cover；14, limit plate；15, wild card Plate；16, interior snap-gauge；17, upper sealing plate；2, lower die-sleeve；21, the second outer casing；22, the second inner casing；23, lower cover；24, it limits Slot；25, exterior bayonet slot；26, inner card cage；27, lower sealing plate；3, forming cavity；4, feed opening；5, support frame；6, sliding rail；7, idler wheel.

Specific embodiment

The utility model is described in further detail below in conjunction with attached drawing.

It referring to Fig.1, is that a kind of polyethylene outer protective pipe of polyurethane heat-insulation bend pipe disclosed by the utility model is once extruded into Pattern tool, including the Upper Die-sleeve 1 and lower die-sleeve 2 being oppositely arranged up and down, Upper Die-sleeve 1 and lower die-sleeve 2 are arc-shaped semicanal knot Structure, internal-and external diameter is identical, combines and forms cavity in the pipe of formation, is arranged to interlayer on tube wall, the interlayer of two die sleeves is in contact surface Position connection, forms the forming cavity 3 of polyethylene outer protective pipe, the cylindrical structure that forming cavity 3 is arc-shaped.Upper Die-sleeve 1 and lower die-sleeve 2 Outer wall on the position of contact surface is provided with opposite connection otic placode (not shown), Upper Die-sleeve 1 and lower die-sleeve 2 pass through Connection otic placode is fixedly connected with bolt.

The closing of the same end of Upper Die-sleeve 1 and lower die-sleeve 2, the other end are provided with dismountable closing plate structure, make 3 shape of forming cavity At sealing structure, feed opening 4 is offered on 2 outer wall of Upper Die-sleeve 1 and/or lower die-sleeve, for the addition injection rubber into forming cavity 3 To fill full forming cavity 3 the outer of Upper Die-sleeve 1 has been arranged in the present embodiment in feed opening 4 by the polyethylene raw material that extruder squeezes out At the top of wall, polyethylene raw material is facilitated to flow downward.In order to avoid polyethylene raw material too fast hardening by cooling in forming cavity 3, upper It is provided with heat tape on the outer wall and inner wall of die sleeve 1 and lower die-sleeve 2, Upper Die-sleeve 1 and lower die-sleeve 2 are heated.

Referring to Fig. 2, Upper Die-sleeve 1 includes the first inner casing 12 positioned at first outer casing 11 in outside and positioned inside, the The cross sectional shape of one outer casing 11 and the first inner casing 12 is two coaxial annulus, and lower die-sleeve 2 includes positioned at the second of outside The cross sectional shape of outer casing 21 and the second inner casing 22 positioned inside, the second outer casing 21 and the second inner casing 22 is also two The opposite face of coaxial annulus, the first outer casing 11 and the second outer casing 21 is bonded, and the two is made to form the outer sleeve of an arc, The fitting of the opposite face of first inner casing 12 and the second inner casing 22, makes the two form the inner sleeve of an arc, and forming cavity 3 is located at Between outer sleeve and inner sleeve.

Referring to Fig. 3, the closed end of Upper Die-sleeve 1 is provided with semicircular upper end cover 13, and the downside of upper end cover 13 is plane, Downside is provided with limit plate 14 far from the side in forming cavity 3, and the closed end of lower die-sleeve 2 is provided with semicircular lower cover 23, the upper side of lower cover 23 is plane, and upper side is provided with limiting slot 24 far from the side in forming cavity 3, on limiting slot 24 Side and a side opening away from forming cavity 3, limiting slot 24 is opposite with the position of limit plate 14, and shape matches, when upper end cover 13 When being bonded relatively with lower cover 23, limit plate 14 is inserted into limiting slot 24.

Referring to Fig. 4, the open end of Upper Die-sleeve 1 is removably connected with the upper sealing plate 17 for closing forming cavity 3, and upper sealing plate 17 is half Annular slab, plate face have a connecting hole close to the position of inner ring and outer ring is circumferentially arranged, shield in the first outer casing 11 and first The threaded hole opposite with connecting hole is offered on the end face of plate 12, upper sealing plate 17 passes through the bolt being threaded through in connecting hole and first Outer casing 11 and the first inner casing 12 are threadedly coupled.

The open end of lower die-sleeve 2 is removably connected with the lower sealing plate 27 for closing forming cavity 3, lower sealing plate 27 and upper sealing plate 17 Structure is identical, and two sealing plate openings are relatively and setting symmetrical above and below, end abut against, the second outer casing 21 and the second inner casing 22 End face on offer the threaded hole opposite with connecting hole, lower sealing plate 27 also by the bolt being threaded through in connecting hole and second outside Backplate 21 and the second inner casing 22 are threadedly coupled.

Referring to Fig. 5, it is provided with outer card plate 15, the second outer casing 21 along its length on the inside of the lower end surface of the first outer casing 11 Upper surface on the inside of be provided with exterior bayonet slot 25, exterior bayonet slot 25 and the height and thickness of outer card plate 15 match, the first outer casing 11 When being bonded with the second outer casing 21, outer card plate 15 is inserted into exterior bayonet slot 25, makes the first outer casing 11 and the second outer casing 21 Medial surface forms a round and smooth curved surface.It is provided with interior snap-gauge 16 along its length on the outside of the lower end surface of first inner casing 12, the It is provided with inner card cage 26 on the outside of the upper surface of two inner casings 26, inner card cage 26 and the height and thickness of interior snap-gauge 16 match, the When one inner casing 12 is bonded with the second inner casing 22, interior snap-gauge 16 is inserted into inner card cage 26, in the first inner casing 12 and second The lateral surface of backplate 22 forms a round and smooth curved surface.

Referring to Fig. 6, multiple support frames 5 are welded on the inner wall of lower die-sleeve 2 along its length, are fixed on support frame 5 There is the sliding rail 6 along the setting of 2 length direction of lower die-sleeve, the height of sliding rail 6 is less than the inner diameter of lower die-sleeve 2, in same with lower die-sleeve 2 Axis it is arc-shaped, 6 top of sliding rail slidably connects multiple idler wheels 7, and the upper end of idler wheel 7 is fixed on the inner wall of Upper Die-sleeve 1, makes Die sleeve 1 can be mounted on lower die-sleeve 2 along the circumferential slippage where sliding rail 6.

The implementation principle of the present embodiment are as follows: Upper Die-sleeve 1 is placed on idler wheel 7,15 He of outer card plate of 1 open end of Upper Die-sleeve Interior snap-gauge 16 is aligned and is embedded in the exterior bayonet slot 25 of 2 closed end of lower die-sleeve and inner card cage 26, along sliding rail 6 to the upper of lower die-sleeve 2 Side pushes Upper Die-sleeve 1, and Upper Die-sleeve 1 is made gradually to cover conjunction on lower die-sleeve 2, until the limit plate 14 of 1 closed end of Upper Die-sleeve and lower die-sleeve 2 The limiting slot 24 of closed end abuts, and Upper Die-sleeve 1 and lower die-sleeve 2 are connected and fixed by connection otic placode；By upper sealing plate 17 and lower envelope Plate 27 is separately fixed at the open end of Upper Die-sleeve 1 and lower die-sleeve 2, closes forming cavity 3；It is injected by feed opening 4 into forming cavity 3 Polyethylene raw material waits polyethylene outer protective pipe cooling until forming cavity 3 is filled to form polyethylene outer protective pipe；By 17 He of upper sealing plate Lower sealing plate 27 disassembles, and polyethylene outer protective pipe is pulled out out of forming cavity 3, is directly socketed on working steel tube.For convenience Polyethylene outer protective pipe is pulled out into forming cavity 3, the side wall of forming cavity 3, which is all provided with, is set to smooth surface.

The embodiment of present embodiment is the preferred embodiment of the utility model, and not limitation is originally practical new according to this The protection scope of type, therefore: the equivalence changes that all structures, shape, principle according to the utility model are done should all be covered by practical Within novel protection scope.

Claims (8)

1. a kind of extrusion molding mould of the polyethylene outer protective pipe of polyurethane heat-insulation bend pipe, it is characterised in that: including phase up and down To the Upper Die-sleeve (1) and lower die-sleeve (2) setting connection and be arc-shaped, the Upper Die-sleeve (1) is closed at one end, including is located at outside The first outer casing (11) and the first inner casing (12) positioned inside, the lower die-sleeve (2) and Upper Die-sleeve (1) identical one end Closing, including being located at second outer casing (21) in outside and positioned at the second inner casing (22) of inside, first outer casing (11) and the opposite face of the second outer casing (21) is bonded the outer sleeve to form arc, shield in first inner casing (12) and second The opposite face of plate (22) is bonded the inner sleeve to form arc, and the forming cavity of polyethylene outer protective pipe is formed between outer sleeve and inner sleeve (3), it is provided on first outer casing (11) and/or the second outer casing (21) to forming cavity (3) and squeezes into polyethylene raw material Feed opening (4).

2. a kind of extrusion molding mould of polyethylene outer protective pipe of polyurethane heat-insulation bend pipe according to claim 1, Be characterized in that: the closed end of the Upper Die-sleeve (1) is provided with semicircular upper end cover (13), and upper end cover (13) downside is remote It is provided with limit plate (14) from the side in forming cavity (3), the closed end of the lower die-sleeve (2) is provided with semicircular lower cover (23), lower cover (23) upper side is provided with limiting slot (24) far from the side in forming cavity (3), the upper end cover (13) Opposite with lower cover (23) to be bonded, the limit plate (14) is inserted into limiting slot (24).

3. a kind of extrusion molding mould of polyethylene outer protective pipe of polyurethane heat-insulation bend pipe according to claim 1, It is characterized in that: being provided with along its length outer card plate (15) on the inside of the lower end surface of first outer casing (11), outside described second It is provided on the inside of the upper surface of backplate (21) and outer card plate (15) opposite exterior bayonet slot (25).

4. a kind of extrusion molding mould of polyethylene outer protective pipe of polyurethane heat-insulation bend pipe according to claim 1, It is characterized in that: being provided with along its length interior snap-gauge (16) on the outside of the lower end surface of first inner casing (12), in described second The inner card cage (26) opposite with interior snap-gauge (16) is provided on the outside of the upper surface of backplate (22).

5. a kind of extrusion molding mould of polyethylene outer protective pipe of polyurethane heat-insulation bend pipe according to claim 1, Be characterized in that: the Upper Die-sleeve (1) open end opposite with closed end is removably connected with the upper sealing plate for closing forming cavity (3) (17), the lower die-sleeve (2) open end opposite with closed end is removably connected with the lower sealing plate (27) for closing forming cavity (3).

6. a kind of extrusion molding mould of polyethylene outer protective pipe of polyurethane heat-insulation bend pipe according to claim 5, Be characterized in that: the upper sealing plate (17) is semi-circular plate, and plate face has company close to the position of inner ring and outer ring is circumferentially arranged Hole is connect, the upper sealing plate (17) is connected by the bolt and the first outer casing (11) and the first inner casing (12) being threaded through in connecting hole It connects.

7. a kind of extrusion molding mould of polyethylene outer protective pipe of polyurethane heat-insulation bend pipe according to claim 6, Be characterized in that: lower sealing plate (27) setting identical and symmetrical above and below with upper sealing plate (17) structure, the lower sealing plate (27) pass through Bolt is connect with the second outer casing (21) and the second inner casing (22).

8. a kind of extrusion molding mould of polyethylene outer protective pipe of polyurethane heat-insulation bend pipe according to claim 1, It is characterized in that: being provided with support frame (5) on the inner wall of the lower die-sleeve (2), support frame as described above is provided on (5) along lower die-sleeve (2) sliding rail (6) of length direction setting, the sliding rail (6) be in coaxial arc-shaped of lower die-sleeve (2), upper part is slidably connected Have multiple idler wheels (7), idler wheel (7) upper end is fixed on the inner wall of Upper Die-sleeve (1), slides Upper Die-sleeve (1) along sliding rail (6) It is mounted on lower die-sleeve (2).