CN201143770Y

CN201143770Y - Mold for processing plastic flared tube

Info

Publication number: CN201143770Y
Application number: CNU2007203028112U
Authority: CN
Inventors: 张欢庆
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-12-05
Filing date: 2007-12-05
Publication date: 2008-11-05
Anticipated expiration: 2017-12-05

Abstract

The utility model relates to a processing die of plastic flaring fittings which comprises a mold core and a die cavity; a die chamber is formed by the mold core and the die cavity; the fittings are arranged in the die chamber; the utility model is characterized in that one end of the mold core is fixed with a ventilation rod; a ventilation channel is made on the ventilation rod; two ends of the ventilation channel are respectively provided with an air inlet hole and a gas hole; the air inlet hole is communicated with a ventilation pump; the gas hole is communicated to the internal side of the fittings; the ventilation rod is driven by a dynamic part; the ventilation rod is provided with a mold core set outside; the mold core set contacts the mold core; an upper stop block and a lower stop block are made at two ends of the mold core set respectively; a heating slide block is arranged outside the mold core set; a stop screw is arranged in the heating slide block; the stop screw collides the upper stop block or the lower stop block; the heating slide block driven by a slanted guide pillar contacts a stop plate; flaring slide blocks are arranged at both sides of the heating slide block respectively; a flaring groove is arranged in the internal side of the flaring slide block; the other end of the mold core is connected with the lower slide block which is arranged in the die cavity; a fitting internal mold is formed by the lower slide block, the mold core and the mold core set; a fitting external mold is formed by the die cavity, the heating slide block or the flaring slide block.

Description

The processing mold of plastic flared tube

Technical field

The utility model relates to the processing mold of plastic flared tube, belongs to the manufacture field of plastic products.

Background technology

At present plastic pipe is widely used in water-carriage system, in order to reduce cost, and makes butted part have excellent sealing performance, do not adopt connector during the pipe fitting butt joint, but pipe end is made the enlarging shape, another pipe end is (without enlarging, be flat pipe end) insert this flared end, it is also quite convenient to install.The pipe fitting of injection formed is adopted in existing enlarging processing to plastic pipe, the part that needs enlarging is heated to the thermoplastic state, put into inside and outside die body then with enlarging structure, the styling of the expansion of die body extruding and outer die body in relying on, after cooling, the enlarging moulding, the shortcoming that this method exists is: first, the pipe thickness of extruding back flared part is inhomogeneous, poor stability, and intensity is relatively poor; The second, pipe fitting is put into another mould again and is carried out enlarging, inefficiency after injection moulding.

Summary of the invention

The purpose of this utility model is in order to overcome the shortcoming that prior art exists, to provide the related flared part of a kind of pipe fitting through twice moulding of a secondary mould, and pipe thickness keeps evenly, good stability, and intensity is good, and the processing mold of the high plastic flared tube of efficient.

The technical scheme of the processing mold of the utility model plastic flared tube is: comprise core and die cavity, core and die cavity constitute die cavity, pipe fitting is positioned at die cavity, a fastening vent rod that it is characterized in that core, vent rod is shaped on airway, airway two has air admission hole and gas hole respectively, air admission hole is communicated with air pump, and gas hole leads to the pipe fitting inboard, and vent rod is driven by power part, vent rod is equipped with the core cover outward, core cover lower surface contacts with the core upper surface, and core cover two is shaped on block and following block respectively, the outer heating slide block that is equipped with of core cover, in the heating slide block stop screw is housed, stop screw and last block or following block are collided, and the heating slide block is driven by Angle Pin, contacts with baffle plate, heating slide block both sides are installed the enlarging slide block respectively, and enlarging is shaped on the enlarging groove with the slide block inboard; The other end of core connects sliding block, and sliding block is contained in the die cavity, forms the pipe fitting internal mold by sliding block, core and core cover, forms the pipe fitting external mold by die cavity, heating slide block or enlarging with slide block.

The processing mold of the utility model plastic flared tube, adopt twice moulding of same secondary mould, be injection molded into for the first time the pipe fitting (adopt sliding block, core and core cover to be the pipe fitting internal mold, die cavity, heating slide block are the pipe fitting external mold, form the pipe fitting die cavity of flat pipe end thus) of flat pipe end; For the second time flat pipe end is injection molded into flared end again, withdraws from the heating slide block earlier, use the enlarging slide block instead, form the pipe fitting die cavity of flared end thus.Because during one-shot forming, flat pipe end is positioned at the heating slide block, the heating slide block can carry out local heat to it, therefore withdraws from when heating slide block, and enlarging advances back (i.e. during moulding for the second time) with slide block, flat pipe end still is in the thermoplastic state, good fluidity is compressed air extrusion when becoming flared end, keeps wall thickness even easily, good stability, intensity is good; Owing to be in same secondary mould, to finish, therefore can raise the efficiency greatly, reduce labour intensity.

The processing mold of plastic flared tube of the present invention, its enlarging is equipped with slider guide outward with slide block, and slider guide has been arranged, and enlarging is operated steadily with slide block, guarantees the pipe fitting quality.Between its baffle plate and the die cavity press strip is housed, press strip is shaped on chute, and the heating slide block is housed in the chute, and chute plays guide effect to the heating slide block, can guarantee that heating slide block operates steadily, and guarantees the pipe fitting quality.Its described block of going up is bulge loop or ear with following block.By hydraulic jack or oil motor or driven by motor, also available internal combustion engine is as power with slide block and sliding block for its vent rod, heating slide block, enlarging.Its described baffle plate is the fixed head that drives the power part of vent rod, and as the tank plate of fixed hydraulic oil cylinder, baffle plate adopts existing part (promptly not increasing part in addition), but simplified structure helps reduced volume.Its gas hole is equally distributed more than two or three or four or four by circumference, and gas hole is arranged even more many more, and the flared end quality that extruding is come out is good more.

Description of drawings

Fig. 1 is the matched moulds state diagram with flat pipe end pipe fitting die cavity;

Fig. 2 is the A-A cutaway view of Fig. 1;

Fig. 3 is the matched moulds state diagram with flared end pipe fitting die cavity.

The specific embodiment

The utility model relates to a kind of processing mold of plastic flared tube, as Fig. 1, shown in Figure 2, comprise core and die cavity, core and die cavity constitute die cavity, pipe fitting is positioned at die cavity, a fastening vent rod 2 that it is characterized in that core 1, vent rod is shaped on airway 21, airway two has air admission hole 22 and gas hole 23 respectively, air admission hole 22 is communicated with air pump, and gas hole 23 leads to pipe fitting 3 inboards, and vent rod is driven by power part, vent rod is equipped with core cover 4 outward, core cover lower surface contacts with core 1 upper surface, and core cover two is shaped on block 41 and following block 42 respectively, the core cover 4 outer heating slide blocks 5 that are equipped with, in the heating slide block stop screw 11 is housed, stop screw and last block 41 or following block 42 are collided, and heating slide block 5 is driven by Angle Pin 12, contacts with baffle plate 13, heating slide block both sides are installed enlarging slide block 6 respectively, and enlarging is shaped on enlarging groove 61 with the slide block inboard; The other end of core 1 connects sliding block 8, and sliding block is contained in the die cavity 9, forms the pipe fitting internal mold by sliding block 8, core 1 and core cover 4, forms the pipe fitting external mold by die cavity 9 and heating slide block 5 or enlarging with slide block 6.Its concrete course of work is as follows: first matched moulds, core 1 and sliding block 8 are pushed into respectively in the die cavity 9, heating slide block 5 is embraced core cover 4 and core 1, at this moment, pipe fitting (goods) internal mold is by sliding block 8, core 1 and core cover 4 are formed, the pipe fitting external mold is by die cavity 9, heating slide block 5 is formed, pipe fitting is positioned at the die cavity of being made up of internal mold and external mold, this moment, die cavity was the pipe shape of flat pipe end, reinject and dissolve plastics, different according to dissolving plastics with the material of heating slide block 5, carry out hot briquetting or not hot briquetting, promptly when the material that dissolves plastics or heating slide block is difficult for heat radiation, need not this moment the heating of heating slide block, otherwise then need heat, make plastics keep mobile, be convenient to post forming; After the moulding to be cooled, die sinking, Angle Pin 12 drives heating slide block 5 and skids off, and drive core cover 4 and skid off 2 millimeters, make core overlap 4 end faces and break away from core 1 end face, at this moment, gas hole 23 communicates with the pipe fitting inboard, be convenient to blow, power part advances both sides enlarging slide block 6, and enlarging is embraced pipe end section (because the effect of heating slide block with slide block, need the pipe end section of enlarging still to be in the thermoplastic state), air pump injects compressed air from air admission hole 22, through airway 21, gas hole 23 compression pipe fitting inboards, the pipe fitting of local heat is extruded to enlarging groove 61 inwalls, flat pipe end forms enlarging, after cooling, power part is pulled out enlarging slide block 6, afterwards, power part drives vent rod 2 and pulls out core 1, extract sliding block 8 simultaneously out, all internal molds eject pipe fitting (goods) after extracting out at last.When specific design, make core cover 4 on, following two blocks 41, distance between 42 adds that core cover 4 equates with the distance of heating slide block 5 to baffle plate 13 (as tank plate) with the free gap value (free gap is used for blowing) of vent rod 2, like this, when driving heating slide block 5, Angle Pin 12 rises, stop screw 11 contacts from contacting with following block 42 to rise to last block 41, along with heating slide block 5 continues to rise, making block 41 drive core cover 4 rises, contact with baffle plate 13 up to heating slide block 5, at this moment, core overlaps 4 end faces and leaves core 1 end face, makes gas hole 23 communicate with the pipe fitting inboard.Its enlarging has had slider guide with outside the slide block 6 slider guide 7 being housed, and enlarging is operated steadily with slide block, guarantees the pipe fitting quality.Between its baffle plate 13 and the die cavity 9 press strip 14 is housed, press strip is shaped on chute 141, and heating slide block 5 is housed in the chute, and chute 141 can play guide effect to heating slide block 5, can guarantee to heat slide block 5 and operate steadily, and guarantees the pipe fitting quality.Its described block 41 of going up is bulge loop or ear with following block 42.Its vent rod 2, heating slide block 5, enlarging use slide block 6 and sliding block 8 by hydraulic jack or oil motor or driven by motor, and also available internal combustion engine is as power.Its described baffle plate 13 is the fixed heads that drive the power part of vent rod 2, and as the tank plate of fixed hydraulic oil cylinder, baffle plate adopts existing part (promptly not increasing part in addition), but simplified structure helps reduced volume.Its gas hole 23 is equally distributed more than two or three or four or four by circumference, as shown in Figure 1, at vent rod 2 circumference four gas holes 23 that directly upwards evenly distributed, gas hole is arranged even more many more, and the flared end quality that extruding is come out is good more.

Claims

1, the processing mold of plastic flared tube, comprise core and die cavity, core and die cavity constitute die cavity, pipe fitting is positioned at die cavity, a fastening vent rod (2) that it is characterized in that core (1), vent rod is shaped on airway (21), airway two has air admission hole (22) and gas hole (23) respectively, air admission hole (22) is communicated with air pump, gas hole (23) leads to pipe fitting (3) inboard, vent rod is driven by power part, and vent rod is equipped with core cover (4) outward, and core cover lower surface contacts with core (1) upper surface, core cover two is shaped on block (41) and following block (42) respectively, the outer heating slide block (5) that is equipped with of core cover (4) is equipped with stop screw (11) in the heating slide block, and stop screw and last block (41) or following block (42) are collided, heating slide block (5) is driven by Angle Pin (12), contact with baffle plate (13), heating slide block both sides are installed enlarging slide block (6) respectively, and enlarging is shaped on enlarging groove (61) with the slide block inboard; The other end of core (1) connects sliding block (8), and sliding block is contained in the die cavity (9), forms the pipe fitting internal mold by sliding block (8), core (1) and core cover (4), by die cavity (9) with heat slide block (5) or enlarging is formed the pipe fitting external mold with slide block (6).

2, the processing mold of plastic flared tube as claimed in claim 1 is characterized in that enlarging is with slider guide (7) is housed outside the slide block (6).

3, the processing mold of plastic flared tube as claimed in claim 1 is characterized in that between baffle plate (13) and the die cavity (9) press strip (14) being housed, and press strip is shaped on chute (141), and heating slide block (5) is housed in the chute.

4, the processing mold of plastic flared tube as claimed in claim 1 is characterized in that described upward block (41) and following block (42) are bulge loop or ear.

5, the processing mold of plastic flared tube as claimed in claim 1 is characterized in that vent rod (2), heating slide block (5), enlarging usefulness slide block (6) and sliding block (8) are by hydraulic jack or oil motor or driven by motor.

6, the processing mold of plastic flared tube as claimed in claim 1 is characterized in that described baffle plate (13) is the fixed head that drives the power part of vent rod (2).

7, the processing mold of plastic flared tube as claimed in claim 1 is characterized in that gas hole (23) is equally distributed more than two or three or four or four by circumference.