CN2204708Y

CN2204708Y - Plastic bottle making machine

Info

Publication number: CN2204708Y
Application number: CN 94243268
Authority: CN
Inventors: 林建敏
Original assignee: Individual
Current assignee: Cai Guisen
Priority date: 1994-12-28
Filing date: 1994-12-28
Publication date: 1995-08-09
Anticipated expiration: 2004-12-28

Abstract

The utility model relates to a plastic bottle making machine, composed of a machine frame, a tube blank delivery device, a preheating device, a mould-matched mechanism, a drawing and blowing mechanism and an electric control mechanism. The utility model has the advantages of simple, compact and reasonable structure, adoption of integrated design, low cost, convenient installation and transportation, fully automatic operation, high labor production efficiency and good quality of finished products, and is suitable for producing hollow plastic containers with various specifications and shapes.

Description

Plastic bottle making machine

The utility model relates to a kind of plastic bottle moulding machine, belongs to a kind of employing injection moulding and makes pipe, then pipe is heated or preheating, stretches after again and the plastics-production equipment of hollow containers such as the explained hereafter Coke bottle of blowing and mineral water bottle.

For the processing of hollow plastic container, following several method is arranged substantially:

1, direct extrusion blow method, wherein representational process equipment is the full-automatic extruding and blowing machine of import, for example application number is 86107693, the utility model name is called the Chinese patent of improved hollow bodies maker and method, application number is 89108401, the utility model name is called forming method and the mould and the device of flanged (FLGD) plastic hollow parts, application number is 85203012, the utility model name is called a kind of energy-conservation continuously automatic blow moulding machine, application number is 86201766, and the utility model name is called the full-automatic plastic blow moulding machine; These equipment mostly structure are huge, complicated, cost height, the freight height of the plastic bottle that produces.

2, adopt injection moulding to make pipe, then pipe is heated or preheating, stretch again and the two step method production technology of blowing, this technology biggest advantage is that production equipment is simpler, the blowing of the manufacturing of pipe and plastic bottle is separately carried out, reduce freight, so development is very fast at home, at present, this stretch blow machine mostly is made up of pipe preheating device and stretch blow device two parts, according to manually the good pipe of preheating being moved on to moulding in the stretch blow device, so it is low to give birth to wide efficient, quality of item is difficult to guarantee, the patent of the prior art of this respect is as follows: application number is 88221248, the utility model name is called the equipment that two-step method is produced the PET polyester bottles, application number is 88221296, the utility model title is for producing the equipment of plastic containers, the most representative and state-of-the-art two step method stretch blow machine is that Huangyan City grand plastics machinery mould Co., Ltd of shaking in Zhejiang Province's is in the structure of producing and applying for a patent, their patent No. is 92221160,93202260,93216666, full-automatic stretch blow machine of the prior art is by frame, blank conveyer device, feed mechanism, preheating device, clamping, Stretch and Blow Mechanism is formed, wherein No. 93202260 described equipment of patent are structurally arranged not quite reasonable, cost is also high, and it is difficult to change template in using, and difficulty realizes that a mould has more; Aspect full-automatic stretch blow machine, also have following two patents: application number is 85109749, the utility model name is called the stretching blow molding of cup-like containers, wherein, the plane preform periphery that constitutes the peripheral part of container forms by clamp mode and the core that transports on the disk bottom surface that is installed to rotation, the periphery of preform is clipped between blowing core lower end and the clamp mode, has just formed cup-like containers after carrying out stretch-blow, and the container that moves up from clamp mode then is to finish release movement; Application number is 86104834, the utility model name is called injection stretching blow molding machine, and wherein, the shape that only changes rotating disk just can make the edge of substrate and the support that central part all is used for substrate, and the pull bar number of mold closing mechanism can increase, to realize the high pressure matched moulds.This device structure complexity, the cost height.Immediate prior art is No. 93216666, Chinese patent, but its clamping is not quite reasonable, realizes full-automatic required control technology complexity, and the locked mode tautness is also not enough, and structure is also complicated, can not produce the product of different size or shape simultaneously.

The purpose of this utility model is to overcome the deficiencies in the prior art and provides a kind of simple and reasonable for structure, and is cheap, the production efficiency height, and quality of item is good, the plastic bottle moulding machine of integrated combination preheater and Stretch and Blow Mechanism.

Plastic bottle moulding machine of the present utility model, by frame, blank conveyer device, preheating device, clamping, Stretch and Blow Mechanism, electrical control gear is formed; It is characterized in that: blank conveyer device comprises one or two ring chains that are parallel to each other, the pipe support member that is connected with above-mentioned ring chain, the driving mechanism of sprocket wheel that above-mentioned ring chain is walked around and stepping ground drive sprocket; A soaking chain or a belt that parallels with above-mentioned ring chain is housed in preheating device, and above-mentioned pipe support member matches with soaking chain or belt; Stretch and Blow Mechanism be in mould in the above-mentioned clamping under; Clamping is on the above-mentioned route that ring chain moved; Clamping comprises and is symmetrical in rack-mounted two cursors of above-mentioned ring chain, and the cursor upper end connects mold mounting plate, installation mold on the mold mounting plate, and the drive unit that drives mould open/close is equipped with in the cursor lower end.

Plastic bottle moulding machine of the present utility model, simple in structure, compact, reasonable, make-up machine for preheating and stretch blow integrated design, it cheap, installation and transportation are convenient, can realize full automatic working, the labor productivity height, the quality of item of being produced is good, produces when being suitable for the hollow plastic container of all size, shape.

For introducing plastic bottle moulding machine of the present utility model in detail, be elaborated below in conjunction with accompanying drawing:

Fig. 1 is the schematic diagram of the each several part structure arrangement of plastic bottle moulding machine of the present utility model;

Fig. 2 is that the A of Fig. 1 is to view;

Fig. 3 is that the B of Fig. 1 is to view;

Fig. 4 reflects that mainly C among Fig. 1 of clamping is to view;

Fig. 5 represents that mainly D among Fig. 1 of Stretch and Blow Mechanism and clamping is to view.

Referring to whole accompanying drawings, plastic bottle moulding machine of the present utility model, by frame 10, blank conveyer device 20, preheating device 30, clamping 40, Stretch and Blow Mechanism 50, electrical control gear 60 is formed;

Blank conveyer device 20 wherein comprises one or two ring chains that are parallel to each other 21, among the figure is the embodiment of a chain, adopt two chains, certainly needing two cover sprocket wheels to make it circle circularizes, can increase the stability of work, the pipe support member 22 that is connected with above-mentioned ring chain 21, the driving mechanism 24 of sprocket wheel 23 that above-mentioned ring chain 21 is walked around and stepping ground drive sprocket, chain 21 can enclose squarely or rectangle, the also shape that can enclose into other by several sprocket wheels 23, but chain is preferably rectilinear motion in matched moulds workspace and preheating workspace, pipe support member 22 is positioned on the chain 21 equably, the pipe holder that it is rotated in the body by body and being positioned on and the soaking wheel 27 of lower end are formed, the structure that pipe holder and body constitute an indent is used to insert pipe 70, pipe holder and soaking wheel are hollow, allow that the stretching bar passes through, driving mechanism 24 is by gear 25, gear shaft 26, tooth bar 28 and driving cylinder 29 constitute, cylinder reciprocally drives tooth bar, the rack and pinion engagement, be positioned on ratchet mechanism in the gear, gear is converted into the action of cylinder the rotation of stepping, be conversion of motion the stepping migration of chain by the gear shaft that links to each other with one of them sprocket wheel again, drive the migration of pipe annular, enter preheating zone and blowing workspace successively, for the design that a mould has more, the amount of exercise that drives cylinder will guarantee once to make a plurality of pipe migrations, above-mentioned driving mechanism 24 also can adopt stepper motor of the prior art, should cooperate a braking mechanism (not shown) in case of necessity.

A soaking chain or a belt 31 that parallels with above-mentioned ring chain is housed in preheating device 30, soaking under the above-mentioned pipe support member 22 wheel 27 matches with soaking chain or belt, soaking chain or the running of belt annular, driving the soaking wheel rotates, and then the drive pipe is done rotation, evenly heat pipe effectively, preheating device also comprises and is symmetrical in quartz heating-pipe 32 and the reflecting plate 33 that the pipe centre of motion is placed in two sides, wherein the quartz heating-pipe of two sides be preferably in up and down on the height staggered, to increase the uniformity of preheating.

Clamping 40 is on the route that above-mentioned ring chain 21 moved; comprise and be symmetrical in rack-mounted two cursors 41 of above-mentioned ring chain; the cursor upper end connects mold mounting plate 42; installation mold 43 on the mold mounting plate; the drive unit 44 that drives mould open/close is equipped with in the lower end of cursor 41; this driving mechanism can adopt the toggle mechanism of prior art; also can between two cursors, pacify cylinder and come folding; toggle mechanism has auto-lock function; be widely used in the locked mode occasion; toggle mechanism among the figure comprises the crank 45 that links mutually with cursor; center-pole 46, the other end hinge joint of 47, two cranks of a mobile cover of cover puts mobile on the center-pole; moving cover 47 can be driven up and down by cylinder, also can be spurred up and down by cable wire or other equivalent.

Stretch and Blow Mechanism 50 be in mould in the above-mentioned clamping 40 under; it should have seals; stretch; the function of blowing; the Stretch and Blow Mechanism course of work of prior art is: the oral area of at first sealing pipe; sealing cylinder of general employing moves to be finished; and then draft cylinder work; the pipe that it is good that draft cylinder promotes the preheating of stretching pole pair stretches; at this moment; the time relay that is contained on the controller picks up counting; to the time of setting; relay is blown to pipe through blow head by solenoid control compressed air, also can do further stretching simultaneously, and the problem that this mechanism exists has following 4 points:

1) time set of the time relay will change a kind of product of specification by rule of thumb, do one to the time value that the time relay is set and adjust;

2) machinery of the height of air pump air storage chamber air pressure and stretching cylinder cooperates degree of tightness all to influence the speed of stretching bar operation, and the bar that promptly stretches differs widely in the degree of depth of the time interval in-draw that sets;

3) for once going out two moulds or the stretch blow machine of multimode more, the operating characteristic of each stretching cylinder is not the same, so need frame for movement to connect all stretching bars, allows its synchronous working, increases machine complexity and cost;

4) need a cover sealing cylinder, increase the complexity and the cost of structure;

In the forming method that pipe is circumferentially blown and axially drawing combines, influencing quality of item and final directed deciding factor is to grasp to blow and the relation that stretches, general product to each specification, preheat temperature with respect to pipe has a best point to exist, the amount of tension of stretching bar accounted for the percentage of the whole amount of tension of stretching bar or the percentage that the location point of stretching bar in mould accounts for entire die die cavity height when this best point needed to blow exactly, and this point all is the insurmountable problems of prior art.

The Stretch and Blow Mechanism 50 of plastic bottle moulding of the present utility model is by draft cylinder 51, stretching bar 52, air valve 53 is formed, air valve 53 1 ends link to each other with source of the gas, the other end is connected to blow head 54, blow head is blown in pipe 70, and the migration position signal of stretching bar is sent to signal processing apparatus 55, and signal processing apparatus 55 is connected with air valve 53; Whole draft cylinder 51; draft cylinder and blow head 54(are installed have the function of sealing device head concurrently) framework 57 supported by a lever 56; hinge joint is on support 10 in the middle of the lever; the other end of lever is connected with clamping 40; the action of matched moulds can be depressed the other end of lever, makes to lift on the sealing device head 54 to seal the arrangement that has more for a mould; a plurality of stretching bars 52 are connect by a tie-beam 58, and tie-beam slides up and down by scroll wheel 59 in framework.

The correction of Stretch and Blow Mechanism of the present utility model is except simplifying enclosuring structure, mainly be to overcome in the prior art and control the drawback that air valve is blown by the time relay, the air blowing of air valve is controlled in the location of migration position when using the stretching of stretching bar instead, this is the concrete application of the conclusion that draws after the comprehensive stretch blow machine bottle blowing quality quality experience, this thought has been arranged, and correlation technique of the prior art all can be served this mechanism; Basically, this mechanism comprises the migration position that provides the stretching bar by all means, receives this signal in the position of setting and this signal is used for the air blowing control of air valve;

The migration position signal of stretching bar itself is provided by the stretching bar, also can provide by the piston in the draft cylinder, can also be at signal lever that is synchronized with the movement with the stretching bar of other end peace of stretching bar, can pass through transmission mechanism of the prior art again, for example schemes such as gear, tooth bar, stay cord synchronously provide signal to the migration of stretching bar.

Signal processing apparatus can be travel switch, after putting in place, stretching bar or suitable mechanism bump a lower stroke switch, go to control opening of air valve again by travel switch, signal processing apparatus also is an optoelectronic switch, the stretching bar moves to certain position, through hole of opening on the stretching bar and optoelectronic switch installation site are on an optical link time, optoelectronic switch provides control signal, signal processing apparatus also is a magnet proximity switch, allow above-mentioned stay cord directly remove to spur air valve besides, all schemes all can be finished by prior art under invention thought of the present utility model, so do not illustrate on figure one by one.

Electrical control gear 60 is used for using electricity or compressed-air actuated other mechanism or device provisioning electric power and distributing source of the gas to needs, and is only schematically illustrated in the drawings.

For reducing the temperature of pipe support member 22, can to the road of preheating device 30, cooling fan 71 be installed at clamping 40 in case of necessity.

The same with various stretch blow machines in the prior art, frame is the framework that whole equipment is installed, support is used for supporting, installing electricity, gas circuit of all the other each funtion parts and need of work etc., its structure is as the criterion to arrange each part of stretch blow machine, owing to belong to the scope of prior art, so on figure, do not describe in detail.

Each funtion part of stretch blow machine adopts above-mentioned setting, can make complete machine structure very reasonable, compact, install, transportation, use and all make things convenient for, other auxiliary equipment, for example, circuit, gas circuit etc., all can be in frame arrange well, also realize that for industrial computer is installed microcomputerized control created condition, real full-automatic to realize.

Because the utility model exactly is the improvement to the full-automatic drawing-blowing forming machine of two step method commonly known in the art, inventive point of the present utility model is the integrated arrangement to the each several part structure, wherein each part is formed all can be with reference to all schemes of prior art, so, in the application's accompanying drawing, form belonging to each several part structure of the prior art, for example Stretch and Blow Mechanism, electrical control division grades, or only schematically shows, omit, concrete structure sees also the prior art of above introducing, and particularly Chinese patent 2100301,2127656,2145696,2157862, and accompanying drawing is also simple as far as possible, and what have only represents with line chart.

Can have the spacing adjustable structure between above-mentioned template installing plate and the cursor, to adapt to the mould of different size, similar chute, adjustable bolt all can be realized this structure, are not shown specifically among the figure.

For allowing the folding smoothly of two dies, can be between the junction surface of two half module tools the setting-in pole, the location that both had been used for two half module tools, make things convenient for its folding again, half that pole is mounted in it, corresponding second half then for holding the half slot of pole, can have a plurality of poles and half slot on every half module tool, be not shown specifically among the figure.

Consider that the part goods have the bottom of indent, the demoulding of goods has difficulty, can become the top of mould the top cover 81 of one setting-in this moment, be equipped with on the described top cover with opening, matched moulds and falling, the elevating mechanism 80 that rises, this mechanism can be that the spring that passes through of known technology is pressed in push rod on the voussoir on the frame, it also can be the cylinder of hydraulic control, it also can be the electromagnetism action component, this elevating mechanism comprises a support 82 among the figure, top cover 81 is hung on the support by spring 83, adorn one on the mold mounting plate and press frame 84, pressing the frame front end is a roller 85, and top cover top also has a pressing plate 86, during matched moulds, mold mounting plate drives presses frame to depress, and roller is correspondingly depressed top cover.

Claims

1, a kind of plastic bottle moulding machine, by frame, blank conveyer device, preheating device, clamping, Stretch and Blow Mechanism, electrical control gear is formed; It is characterized in that: blank conveyer device comprises one or two ring chains that are parallel to each other, the pipe support member that is connected with above-mentioned ring chain, the driving mechanism of sprocket wheel that above-mentioned ring chain is walked around and stepping ground drive sprocket; A soaking chain or a tooth bar that parallels with above-mentioned ring chain is housed in preheating device, and above-mentioned pipe support member matches with soaking chain or tooth bar; Stretch and Blow Mechanism be in mould in the above-mentioned clamping under; Clamping is on the above-mentioned route that ring chain moved; clamping comprises and is symmetrical in rack-mounted two cursors of above-mentioned ring chain; the cursor upper end connects mold mounting plate; installation mold on the mold mounting plate, cursor lower end are equipped with the drive unit that drives mould open/close.

2, plastic bottle moulding machine according to claim 1 is characterized in that the driving mechanism of above-mentioned stepping ground drive sprocket is made up of gear, gear shaft, tooth bar and driving cylinder.

3, plastic bottle moulding machine according to claim 1 is characterized in that above-mentioned pipe support member by body, the pipe holder, and bearing, the soaking sprocket wheel is formed.

4, plastic bottle moulding machine according to claim 1 is characterized in that two above-mentioned ring chains be arranged in parallel, and the pipe support member is fixedlyed connected with it.

5, plastic bottle moulding machine according to claim 1 is characterized in that above-mentioned preheating device comprises quartz heating-pipe and the reflecting plate that surrounds the pipe landline.

6, plastic bottle moulding machine according to claim 1, it is characterized in that above-mentioned Stretch and Blow Mechanism is by draft cylinder, the stretching bar, air valve is formed, air valve one end links to each other with source of the gas, the other end is connected to blow head, it is characterized in that: the migration position signal of stretching bar is sent to signal processing apparatus, and signal processing apparatus is connected with air valve.

7, plastic bottle moulding machine according to claim 6 is characterized in that the migration position signal of above-mentioned stretching bar is provided by stretching bar or draft cylinder.

8, plastic bottle moulding machine according to claim 6 is characterized in that above-mentioned signal processing device is changed to travel switch or optoelectronic switch or magnet proximity switch.

9, plastic bottle moulding machine make-up machine according to claim 1 is characterized in that above-mentioned mould top is equipped with a top cover, and the elevating mechanism of falling, rising with the opening and closing mould is housed on the described top cover.