CA1154920A - Heating blow-molding machine - Google Patents

Abstract

ABSTRACT OF THE DISCLOSURE
This heating blow-molding machine fabricates a number of bottle-shaped containers of biaxially oriented plastic piece or parison by supplying the plastic pieces to a heating unit to heat them to the orientation temperature and then supplying them to 12-station rotary blow molding machine for biaxial orientation. Each of the plastic pieces or parisons is made of polyethylene terephthalate resin to provide a thin-walled transparent bottle-shaped container of cylindrical shape with one bottom and a prefinished neck portion injection molded simultaneously in numerous number by an injection molding machine.

This blow-molding machine consists of a turntable for the heating unit, a turntable for a blow-molding machine, and a turntable for loading and unloading the pieces and the products blow-molded from the pieces. Each of the turntables is continuously turned in predetermined direction at an intrinsic speed set with respect to the number of stations provided thereat, the time required for heating the pieces, and another time required for blow-molding and cooling the pieces, etc. Further, a rotor is employed to transfer the pieces or container products between the turntables rotated at their intrinsic speeds, respectively. The rotor is rotated according to a speed curve at a moving speed equal to the peripheral speed of the turntable opposite to the turntable for transferring the pieces held thereby at the holding portions. This invention thus provides a heating blow molding machine which can increase largely the number of products blow-molded per unit time, and smoothly rotates the essential rotating portions thereof to thereby eliminate mechanical trouble.

Description

1 ~ BACKGROUND OF THE INVENTION
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2 ¦ This invention relates to a rotary heating blow-molding

3 ¦ machine for fabricating a bottle-shaped container of biaxially

4 oriented synthetic resin such as plastic and, more particularly, 1 to a blow-molding machine for fabricating a thin-walled 6 ¦ transparent high-impact plastic container of high molding 7 I accuracy by orientation-blowing synthetic resin such as 8 ¦ polyethylen~ terephthalate.
9 1 In an ordinary process for molding a blow-molding ¦ bottle-shaped container of biaxially oriented synthetic resin, 11 I there is generally adopted a process for blow-molding 12 l¦ container by the steps of extrusion-molding a cylindrical 13 ¦ preformed piece or parison in an axtrusion molding machine, 14 ~1 engaging the parison thus extrusion-molded in split blowing , molds and cutting it in predetermined length, and blowing 16 ~I compressed fluid (generally air) lnto the parison thus engaged 17 ~1 to thereby expand the parison thus engaged in the split molds 18 so as to ~hus blow-mold a bottle-shaped container~
19 In such a process, however, the parison thus blow-molded into a bottle-shaped container is radially oriented only ~1 uniaxially but is not oriented axially at all.
22 ~ An injection blow molding process is utilized to 23 Ij eliminate the disadvantages of the above described extrusion 24 ¦I blow molding process.
25 ll This injection blow molding process blow~molds a bot-tle-26 ll shaped container by the steps of orienting a preformed piece 27 1l Of cylindrical shape with a bottom preformed by an injection 28 ll molding machLne or by an extrusion molding machine in a blowing 29 1l mold and introducing compressed fluid or air into the blow 30 ~¦ mold to thereby radially orient the piece.
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~1 !I - 2 -'~;

4~ 0 1 According to the injection blow molding process, since the 2 molded product is biaxially or:iented, it can sufficiently 3 be oriented to improve various mechanical properties such 4 as durability and mechanical strength and it transparency.
l!In case where the preformed piece is molded by an S ~ injection molding process, the degree of the viscosity of 7 1 synthetic resin material used for the preformed piece does 8 ¦ not become in problem. Since the process can, however, employ 9 1 synthetic resin having good moldability and low viscosity ~ such as, for example, saturated polyester resin, it can ~ freely select and use synthetic resin material having adequate 12 I physical properties for the utilization purpose as a bottle. I
13 ll The most general example of carrying out the injection 14 ,~ blow molding process installs separately an injection molding '¦ machine and a blow-molding machine and thus fabricates 16 'I a blow-molded product by the steps of coneying a preformed 17 'l¦ piece molded in the injection molding machine into the blow-18 i molding machine, uniformly heating the preformed piece cooled 19 1 at separating and conveying time from the injection molding 20 ¦¦ machine to the temperature capable of biaxially orienting 21 ll it before setting it in the blow-molding machine, and then 22 ll setting the piece thus uniformly heated in the blow-molding 23 1I machine to thereby blow-mold the piece into the final product.
24 j There are various types of a heating blow-molding "
,1l machine having the blow-molding machine and a heating unit 26 l in combination. The typical fundamental constitution of such 27 il a heating blow-molding machine incorporates a heating unit 28 I and a blow-molding machine of turntable construction commonly 29 ' and fabricates a product by the steps of uniformly heating ~l numerous preformed pieces while rotating the pieces around ll ~ ~5~L920 1 a center thereof, sequentially feeding the pieces thus heated 2 to a blow-molding machine, engaging the pieces thus heated 3 one by one with numerous blowing molds rotating around a center 4 ¦ as attached to a turntable in th~e blow-molding maGhine, and 1 orientating blow-molding the pieces thus engaged and discharging 6 the pieces~
7 The operations of feeding the pieces to the blow-molding 8 machine and conveying the pieces or final products between the 9 turntables are automatically controlled at a timing upon stoppage of the respective turntables by intermittently turning 11 ¦ the turntables of the heating unit and blow-molding machine 12 1 at every predetermined interval of central angle.
13 1I Since the turntables are thus intermittently rotated, 14 1l this heating blow-molding machine can easily take a timing lS I for feeding the pieces and the final products betwen the 16 , turntables to thus easily center the pieces and the products 17 1¦ in the conveyance, however since the pieces and the products 18 l¦ are thus intermittently fed, the heating blow-molding machine 19 l¦ can fabricate less number of the pieces and products per unit time, namely less productivity with large volume, complicated 21 and expensive facilities. Further, the intermittent rotation 22 and operation of the heating blow-molding machine vigorously 23 ,l¦ wears the respective portions particularly bearings and 24 !I brakeing units resulting in fesible entire vibrations as 25 ¦I serious diasdvantages.
26 ll SUMMARY OF THE INVENTION
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27 ll Accordingly, a primary object of the present invention 28 ll is to provide a heating blow-molding machine which eliminates 29 l¦ the aforementioned disadvantages of the conventional machine and can fabricate numerous preformed pleces per unit time ln .

1 I high productivity such as approx. twice the conventional 2 ~¦ moldability.
3 11 It is another object of the present invention to 4 j provide a heating blow-molding machine which can convey the s 'I! pieces and final products smoothly without vibration so as 6 I to eliminate auxiliary units such as brake units, buffer units 7 l~ and timing position correcting units to thereby ~implify 8 ~ the constitution htereof to occur less trouble.

9 1l It is still another object of the present invention ll to provide a heating blow -molding machine which can simplify 11 ll the conveying or feeding operation of the pieces and final 12 ~ll products between adjacent units without complicated structure.
13 ll It i5 still another object of the invention to provide 14 i a heating blow-molding machine which can take readily a timing 15 ll in operation by means of common imput from unitary output 16 1l of one reduction gear.

17 ll The present invention provides a heating blow-molding 18 ~¦ machine which conveys to circulate a number of jigs as 19 1! orientation jigs from a piece loading and unloading unit 1 of rotary table structure through a heating unit of rotary 21 1I table structure to a biaxially orientation blow molding machine 22 ¦l of rotary table structure, from which the jigs are again ~ ll conveyed to be circulated to the piece loading and unloading 24 l unit, supports synthetic resin pieces of cylindrical shape ¦ each with a bottom by the respective jigs in downward neck 26 '~ poxtion attitude at the loading position of the piece loading 27 ¦ and unloading unit, heats the pieces uniformly at a temperature 28 il capable of orienting the pieces by the heating unit, then 29 ¦¦ biaxially orientation blow-molds the pieces into final ll products as bottle-shaped contai~ers- by the blow molding 2~
1 machine, and unloads -the products of the bottle-shaped 2 containers from the piece loading and unloading unit at the 3 unloading position.
4 More particularly there is provided in accordance with the present invention, a heating blow-molding machine 6 comprising;
7 heating means for heating a plurality of pieces 8 injection-molded as preformed pieces at a temperature adapted 9 for biaxially orientation blow molding the pieces and including a turntable for equi-distantly supporting a plurality of jig 11 holders for holding a plurality of jigs at the periphery edge 12 thereof for passing the jig holders -through a heating chamber 13 thereof while rotating the jig holders around their own axes, 14 piece blow molding means for biaxially orientation blow molding the pieces thus heated by said heating means into 16 a plurality of products and including a turntable for equi-17 distantly mounting a plurality of blowing molds at the peri-18 pheral edge thereof for holding the jigs upon closing thereof, 19 piece loading and unloading means for sequentially continuously receiving the pieces in neck downward position 21 and unloading the products therefrom and including a 22 turntable for equi-distantly disposing a plurality of 23 holding pieces at the peripheral edge thereof for holding 24 the jigs therewith, loader means having a rotor for transferring the jigs æ from said heating means to said piece blow mold.ing means, 27 unloader means having a rotor for transferring the 28 jigs from said blow molding means to the piece loading and 29 unloading means, transfer means having a ro-tor for transferring the 31 jigs from said piece loading and unloading means to said ~ 6 ~7 ~ ~, t-4~2 1 heating means, 2 whereln the turntables of said heating means, p.iece 3 blow molding means and piece loading and unloading means 4 are continuously turned in prede-termined intrinsic directions at respective intrinsic constant speeds in 6 predetermined relationship so as to rotate accord:ing to 7 predetermined intrinsic speed curves at the speed equal 8 to the peripheral speed of the opposite turntable facing 9 with each other at the moving speeds of the jigs held at the peripheral edge of the turntable when the jigs reach 11 the transfer position of the pieces or products to the 12 opposite turntable.

14 The foregoing objects and other objscts as well as the characteristic features of the invention will become 16 more apparent and more readily understandable by the follow-17 ing description and the appended claims when read in conjunction 18 with the accompanying drawings.
19 Fig. 1 is a plan view showing the plan disposition of the essential components and units of the apparatus constructed 21 according to the present invention;
22 Fig. 2 is a schematic plan view of the disposition of the 23 essential units forming the apparatus in driving relationship - 6a -,~
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1154~1120 1 1l thereamong;
2 i Fig. 3 is a partial schematic plan view of the gear 3 reduction relations shown in ~`ig. 2;
4 1 Fig. 4 is a schematic plan view of the cam unit , relations shown in Fig. 2;
6 1 Fig. S is a side view partially fragmentarily shown 7 1 of simplified heating unit of the appa~atus;
8 ¦ Fig. 6 is a longitudinal sectional view of the jig 9 1 holder of the apparatus/
1I Fig. 7 is a plan view of the jig holder in Fig. 6;
11 Figs. 8 and 9 are partial views of the attitude 12 ¦ controller, wherein Fig. 8 is a plan view, and Fig. 9 is 13 1l a side view;
14 ~¦ Fig. 10 is a vertical sectional view of the jig ,1 holder of the state for holding the piece;
16 ' Figs. 11 and 12 are vertical sectional views of the 17 ,I jig holder with the blow-molding machine; wherein Fig. 11 is 18 ~I the state that the piece is axially oriented, and Fig. 12 is 19 ¦¦ the state that compressed air is introduced into the piece I to be radially oriented;
21 ll Figs. 13 to 15 are views of the orientation cam unit 22 1l of the apparatus, wherein Fig. 13 is a side view of the ~ ¦ assembled disposition with the blow molding machine, Fig~ 14 24 ,¦ is a side view of the passage, and Fig. 15 is a plan view;
I Fig. 16 i5 a perspective view in external appearance 26 l of the brake unit of the apparatus;
27 1l Fig. 17 is a longitudinal sectional view of the 28 ~ fundamental configuration of the piece loading and unloading 29 ~ unit;
Eigs. 1 a and 19 are views of the loadlng unit, whe-ein i ~i4~
l Fig. 18 is a side view partly in section, and Fig. 19 is 2 a plan view partly fragmented;
3 Fig. 20 is a side view of the unloading unit partly 4 in section;
Figs. 21 and 22 are views of the transfer means, 6 ~ wherein Fig. 21 is a side view partly in section, and Fig. 22 7 ¦¦ is a plan view partly fragmented;
8 ¦¦ Figs. 23 to 28 are explanatory views of the transfer 9 ¦l operation of the jig, wherein Fig. 23 is a graphical 0 ¦ representation showing the operation modes and the timing of the loading unit, unloading unit, and transfer means with 12 1I respect to the rotating speed change of the rotor in curve, 13 ¦ Fig. 24 is a view of the state at the timing t1 shown in 14 ~¦ Fig. 23, Fig. 25 is a view of the state at the timing t2 shown i'1 in Fig. 23, Fig. 26 is a view of the state at timing t3 shonw 16 ~ in Fig. 23, Fig. 27 is a view of the state at the timing t~ ¦
17 shown in Fig. 23, and Fig. 28 is a view of the state at the 8 I timing t5 shown in Fig. 23.
19 i DESCRIPTION OF THE PREFERR~D EMBODIMENTS
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Reference is made to the drawings, particularly to 21 Fig. 1 showing the overall heating blow-molding machine 22 constructed accordin~ to the present invention, wherein like ¦ reference numerals designate the same parts in the following 4 1 views.
j The heating blow-molding machine of this invention 26 , consists essentially of a piece laoding and unloading unit 5 27 I which sequentially continuously receives the pieces P
28 l~ injection-molded as preformed material in downward neck 29 ~ portion attitude and unloa~s the container products S such as bottle-shaped containers out of the machine, a heating !, I

11~4920 1 unit 1 for heating the pieces P sequentially fed uniformly 2 to the temperature adapted for the biaxially orientation blow 3 molding, and a biaxially orien1:ation blow molding machine 4 4 for biaxially orienting the pieces P uniformly heated to S I predetermined temperature to b:Low mold them into container S ll products S. All Of these heat:Lng unit 1, machine 4, and 7 ¦ loading and unloading unit 5 are constructed in turntable 8 Ij shape. The heating unit 1 has a turntable 1n, a number of 9 ¦¦ jig hoders 2 installed at equi-distant interval at the periphera~
l¦ edge of the turntable 1n, and a number of jigs 9 held at the 11 1 respective jig holders 2 for holding the pieces P in downward 12 ¦ neck portion attitude. The biaxially orientation blow molding 13 machine 4 has a turntable 4g, a number of blowing molds 4a 14 , disposed equi-distantly at the peripheral edge of the turntable lS 1 4g for holding the respective jigs 9 upon closing thereof.
16 ~¦ Further, the loading and unloading nuit 5 has a turntable 5a, 17 ll a number of holding pieces 5e disposed equi-distantly at the 18 I peripheral edge of the turntabel 5a for holding the respective 19 ll jigs 9 therewith.
¦ The turntables 1n, 4g and 5a of the respective heating 21 11 unit 1, machine 4, and loading and unloading unit 5 are 22 I continuously rotated at intrinsic constant speeds, respectively.
~ I The jigs 9 for holding the pieces P or the products S
24 ll are transferred among the heating unit 1, blow molding machine 1¦ 4, and loading and unloading unit 5, and are circulatingly 26 1l conveyed thereamong. Thus, the pieces P supported at the 27 li respective jigs 9 are heated, biaxially orientation blow 2~ 1! molded, and unloaded. There are also provided a loader 6 29 ¦I for transferring the jigs 9 from the heating unit 1 to the blow molding machlne 41 an U l a~er 7 for transferring l1549~0 l ¦ the jigs 9 from the blow moldir.g machine 4 to the loading 2 and unloading unit 5, and transfer means 8 for transferring 3 the jigs 9 from th~ loading and unloading unit 5 yo the heating 4 unit 1.
1 The loader 6, unloader 7, and transfer means 8 incorporat~
6 ¦¦ rotors 6a, 7a, and 8a, respectively, which have holding arms 7 ¦ 6b, 7b, and 8b, respectively for holding the jigs 9.
8 ll The rotors 6a, 7a, and 8a are so set as to rotate according to 9 ¦¦ a predetermined speed curve at the speed equal to the peripheral I speed of the opposite turntables 1n, 4g, and 5a facing with ! each other at the moving speeds of the respective holding ~ arms 6b, 7b, and 8b when the arms 6b, 7b, and 8b reach the 13 l¦ transfer position to the opposite turntables 1n, 4g, and 5a~
14 , respectively.
15 ll Accordingly, since the holding arms 6b of the rotor 6a 16 ,¦ of the loader 6 rotate, for example, at the speed different 17 ll from that of the turntables 1n and 4g, they must be selectively 18 l~ set so that a plurality o the arms 6b may not simultaneously 19 1 face with the turntablei 1n and 4g.
It is noted that, although the numbers of the holding 21 ! arms 6b, 7b, and 8b are not particularly limited at the 22 ¦ respective rotors 6a 7a, and 8a, they are set to the number ~ l¦ for smoothly rotating the rotors 6a, 7a, and 8a corresponding 2~ ~¦ to the speed difference among the turntables 1n, 4g, and 5a 25 ¦I facing with each other.
26 l¦ In the embodiment shown, as clear from Fig. 1, the 27 1 loader 6 and unloader 7 incorporate three holding arms 6b, and 28 1l 7b, respectively, and the transfer means 8 accommodates four 29 1~ holding arms 8b.
30 1l It is noted that there are close relationship between I

I

~1 ~ ~ ~9L92~
1 ~ the numbers o~ the holding arms 6b, 7b, and 8b oE the loader 6, 2 unloader 7, and transfer means 8 and the turning speeds of 3 1 the respective turntables 1n, 4g, and 5a. More particularly, 4 ¦ the relationship between the turning speeds of the respective 1 turntables 1n, 4g, and 5a and the numbers of the holding arms 6 ~ 6b, 7b, and 8b must be so set in case of the turn-table 1n 7 ¦ that the pieces P cooled to the room temperature should be 8 ¦¦ disposed withing the heating chamber la during the time when 9 ¦¦ they are uniformly heated to the temperature capable of ¦¦ regularly biaxially orienting the pieces P. The relationship ll ii should also be set in case of the turntable 4g with respect 12 ,I to the rotating speed thereof in term of the number of the 13 1 jig holders 2 so that the pieces P must be disposed within 14 1 the blowing molds 4a during the time while they are sufficiently 1 solidified by cooling after biaxially orientation blow molding.

16 1l In addition, the relationship must also be so set in case 17 1! f the turntable 5a with respect to the number of the molds 18 11 4a that the turning speed thereof must be adapted for those 19 ¦¦ of both the turntables ln and 4g at the speed for sufficiently receiving the pieces P and unloading the products S.
21 As was heretofore described, it is noted that the 22 ¦ respective units of the heating blow-molding machine of the present invention such as the turntable 1n in the heating 24 ,¦ unit 1, turntable 4g in the blow-molding machine ~, turntable 25 ll 5a in the piece loading and unloading unit 5, rotor 6a in 26 ll the loader 6, rotor 7a ln the unloader 7 and rotor 8a in the 27 ~l transfer means 8 are rotated at the respective intrinsic 28 ~¦ speeds according to the predetermined speed curves, which 29 1 speeds and the curves are not independent from each other, 1 but are sat mutually in predetermined relationship within 11~4920 l respective allowable ranges.
2 ¦ The units composed in the heating blow-molding machine 3 1 of the present invention will further be described in detail 4 ¦ with reference to the drawings.
~ In Fig. 1, which is particularly referred hereinafter 6 to the case that the jigs 9 are loaded by the loader 6 to 7 the blow-molding machine 4 and are unloaded by the unloader 8 7 from the blow-molding machine 4 as exemplified, the heating 9 unit 1 incorporates a turntable ln in which 90 jig holders 2 are equi-distantly installed at the periphery edge thereof, ll ! and the biaxially orientation blow molding machine 4 incorporate 12 ll a turntabel 4g in which 12 blowing molds 4a are equi-distantly 13 ~I disposed at the peripheral edge thereof as well as the piece 14 1l loading and unloading unit 5 incorporates a turntable 5a in jl which 12 holding pieces 5e are equi distantly disposed at 16 ¦¦ the peripheral edge thereof for holding the respective jigs 9.
17 l; The turntable 1n is the largest in diameter, the turntable 4g 18 is next, and the turntabel 5a is the smallest.
19 1 The turning speeds of the respective turntables 1n, 4g, ¦ 5a are so set when loading and unloading the jigs 9 among the 21 I respective turntables 1n, 4g, 5a that, when one turntable 22 ¦ loads one jig 9, it unloads one jig 9 already held thereby 23 ¦ until loading next jig 9 and additionally as to be considered 24 1 regarding the time required for uniformly heating the entire l piece P at a temperature adapted for the biaxially orientation 26 1l blow molding, and the time required for cooling and solidifying 27 1¦ the product S biaxially-oriented and blow-molded.
28 ll In case as exemplifed in Fig. 1, the turntable 4g turns 29 ~ at the fastest speed V1, the turntable 5a turns next at V2, ¦ and the turntable 1n turns at the slowest speed V3.

i49~1~

l At predetermined desired position where ~he turntable 2 ln of the heating unit 1 approaches the turntable 4g of the 3 blow-molding machine 4 is disposed the loader 6 having three 4 holding arms 6b, whlch loader 6 transfers the jig 9 holding the piece P uniformly heated at predetermined temperature from 6 the heating unit 1 to the blow-molding machine 4 by the 7 rotation of the rotor 6a. At predetermined desired position 8 where the turntable 4g of the blow-molding machine 4 approaches 9 ths turntable 5a of the piece loading and unloading unit 5 is disposed the unloader 7 having three holding arms 7b, which 11 unloader 7 transfers the jig 9 holding the product S such as 12 1l¦ a bottle-shaped container biaxially oriented and blow-molded 13 ~ and cooled by the rotation of the rotor 7a from the blow-14 ¦~ molding machine 4 to the piece loading and unloading unit 5.
.¦ Further, at predetermined desired position where the turntable 16 .I Sa approaches the turntable 1n is disposed the transfer means 17 ll 8 having four holding arms 8b, which means 8 transfers the jig 18 ; 9 holding the piece P of downward neck portion attitude supplied 19 from the injection molding machlne (not shownj by the rotation 20` of the rotor 8a from the piece loading and unloading unit 5-21 to the heating unlt 1.
22 There are provided guide plates 12a, 12b, 12c, 12d, 12e, 23 12f at the loading positions of the jigs 9 from the turntables 24 ! 1n, 4g, 5a and at the unloading positions of the jigs 9 to the turntables 1n, 4g, 5a by means of the loader 6, unloader 26 7, and transfer means 8, respectively to perform exact piece 27 or product loading and unloading operations. These gulde 28 I plates 12a, 12b, 12c, 12d, 12e, 12f are so disposed along the 29 rotating trace of the turntable or loading the jigs 9 and as to partially cross the turning trace of the turntable for 2~

1 unloading the ~igs 9.
2 Accordingly, even if certain jig 9 is not held exactly 3 by both sides of the turntables at the loading and unloading 4 position due to certaln reason, it i5 exactly held at the unloading side of the turntable by the operation of the guide 6 plates 12a to 12f.

7 It is naturally noted that the turntables 1n, 4g, 5a 8 and the rotors 6a, 7a, 8a re so set as to turn and rotate in 9 the same direction among the facing turntables at the peripheral edges thereof to move therealong.
11 I Figs, 2 to 4 show the disposition of the rotary drive 12 l¦ sources of the turntables 1n, 4g, and 5a and the rotors 6a, 13 ll 7a, and 8a, respectively.
14 1¦ In Figs. 2 to 4, the numeral 3 generally designates 15 ll an attitude controller for holding the jig holders 3 provided 16 ¦ at the turntable 1n in predetermined attitude capable of easily 17 l¦ receiving the pieces P and unloading the products S.
18 1¦ As obviously seen from Fi~. 3, all the rotary drive 19 ¦I forces are produced by a motor 13. ~he turntable 1n is rotaxily driven through a rack lO with teeth formed at the 21 peripheral edge engaged with a drive gear 1s installed on 22 the output shaft of a reduction gear 1u engaged via a reduction 23 1 gear 14 with a motor 13. The rotating force of the motor 13 24 ¦ is also transmitted through the reduction gear 14 to a reduction gear 5d. The turntable 5a is rotarily driven by the engagement 26 of the output shaft 5c of the reduction gear 5d via a drive 27 gear 5b secured to the gear 5d with the peripheral end of 28 a rack disk 5g. Further, the turntable 4g is rotarily driven 29 by transmitting the rotary force of the motor 13 directly to a reduction gear 41 and engaging a drive gear 4j secured to the ~ ~ _ 1 output shaft 4k of the reduction gear 41 with the peripheral 2 end of a rack table ~h in-tegraLly formed with the turntable 4g.
3 The rotors 6a, 7a, and 8a of the loader 6, unloader 7, 4 and transfer means 8 are rotarily driven via the reduction gear 14 with respect to the respective turntables 1n, 4g, and 6 Sa. As was previously described, the rotating speed curves 7 of the respective rotors 6a, 7a, and 8a depend upon the 8 particular relationship described before.
9 Thus, the output of the reduction gear 14 is applied through special cam units 6f, 7f, and 8f of the loader 6, unloader 7, and transfer means 8 to provide the respective rotations 12 ¦ according to their intrin~ic rotation speed curves of the 13 respective rotors 6a~ 7a, and ~a.
14 1 These cam units 6f, 7f, and 8f alter the rotating 15 l speeds of the rotors 6a, 7a, and 8a at predetermined timing 16 1 by means of the combination of the cams. It should be 17 ll appreciated that since all the can units 6f, 7f, and 8f are 18 i driven by the output of one reduction gear 14, it is very l9 simple to take the timing of their speed variations thereamong.
According to the present invention as exemplified, 21 the jigs 9 are thus loaded and unloaded to be circulatingly 22 conveyed alang predetermined path by means of the rotors 6a, 23 1 7a, 8a of the loader 6, unloader 7 and transfer means ~, 24 1 respectively rotating according to the specific rotating speed curve among the turntables 1n~ 4g, 5a of the heating unit 1, 26 ¦ blow-molding machine 4 and piece loading and unloading unit 5 27 ¦ continuously turned at respective intrinsic speed to be evenly 28 heated, biaxia1ly orientation blow-molded and unloaded from 29 the unit externally as the jigs 9 are conveyed for holding the pieces P in downward neck portion attitude.

1 The constructions of the respective units in the heating 2 ¦ blow-molding machine of the present invention will now be 3 further described in more detail.
4 As shown in Fig. 10, the piece P injection-molded as a preformed material to be biaxially orientation blow-molded 6 ¦I to a product S of bottle-shaped container by the heating 7 ~! blow-molding machine of the present invention is supplied in 8 ~ cooled state to the heating blow-molding machineof this 9 I invention.
ll A collar or flange portion is peripherally formed onto 11 I the outer periphery of the neck portion P1 having an opening 12 1 end of the piece P for rigidly mounting a cover when blow-moldin~
13 1 the piece P into a product S of a bottle-shaped container, 14 ~ which neck portion P1 is attached to the jig 9 for holding the 1 piece P.
lS l The piece P also incorporates a body portion P2 formed 17 ¦ under the neck portion Pl to become the body of the final 18 ¦ product S as a bottle-shaped container by sufficient biaxial 19 I orientation blow-molding and a bottle P3 outwardly protruded 1 in semi-spherical shape.
21 ,1 A gate for injection-molding the piece P is generally 22 ~ at the outer bottom end of the bottom P3, but is not particularl~ , 23 limited.
2~ ¦ The piece P is generally formed on the inner peripheral 1¦ surface thereof in rectilinear smooth plane but is ordinarily 26 ¦ formed with drawing taper on the inner peripheral surface so 27 ~ as to readily draw a core from the mold for blow-molding the 28 ¦ piece P.
~9 ~
As shown in Figs. 10 through 12, the ]ig 9 consists l.
~4~2 1 ¦ essentially of a mandrel 9a, a neck support 9b, a core guide 2 9c, a spacer ring 9d and an orientation core shaft 9e.
3 The mandrel 9a consists of a collar-like or flange-like 4 disk portion 9f and a cylindrical portion 9g of cylindrical shape suspended from the bottom center of the disk portion 9f, 6 which portion 9g incorporates an internal space formed therein 7 communicating with the central portion of the disk portion 9f.
8 ¦ Since the cylindrical portion 9g of the mandrel ga 9 ¦ incorporates a portion to be magnetically attracted to be held ¦ to the jig holder 2 assembled with the heating unit 1, the 11 1 holding piece 5e of the piece loading and unloading unit 5, 12 , or the holding arms 6b of the loader 6, unloader 7 and transfer 13 ~ means 8 by means of magnetic attraction, it is fabricated 14 1 of material having high magnetic permeability such as steel 15 ll or the like.
16 The neck support 9b fixedly placed on the disk portion 17 9f of the mandrel 9a supports the outer periphery of the neck 18 portion P1 of the piece P and is assembled via a heat insulation 19 plat~ 9h on the mandrel 9a.
¦ More particularly, the neck support 9b of the jig 9 is 21 l formed with a hole, to which the neck portion P1 f the piece 22 P is inserted at the center, opened upwardly.
23 ¦ Ths core guide 9c is so assembled within the cylindrical 24 1 neck support 9b as not to be detachable but as to elevationally smoothly slide the orientation core sh~ft 9e disposed on the 26 j central axis of the jig 9 and to also retain the attitude of 27 1 the core sha:Et 9e, and is made of synthetic resin such as Teflon~
28 ll The upper half portion of the core guide 9c facing with 29 1 the hole for inserting the neck portion P1 f the piece P in the neck support 9b is formed in cylindrical shape for substantially l - 17 - ~

ll ~
~5~2 1 snugly inserting into the neck portion P1 of the piece P so 2 as to hold the piece P between the core guide 9c and the 3 neck support 9b without unsteadily rocking.
4 It is preferred to provide a spacer ring 9d within ¦ the mandrel 9a under the core guide 9c as required to operate 6 ¦ as a center guide.
7 The orientation core shaft 9e elevationally movably 8 disposed along the central axis of the jig 9 is lifted by 9 the lifting operation of the orientation pin 4e of the blow-molding machine 4 to axially orient the piece P assembled 11 with the jig 9 when inserted into the blowing mold 4a of the 12 ll blow-molding machine 4, and attaches a core top 9i of heat 13 i insulating material such as Teflon in the shape of inverted 14 1 frustum of a cone having an inverted tapered peripheral 1 surface of the top thereof making contact with the bottom P3 16 1 of the piece P at axially orienting time so as to prevent 17 thermal conduction therebetween and adhesively sticking of 18 the piece P and a nozzle holder 9j of piston shape to the 19 bottom ~isposed within the cylindrical portion 9g.

The core shaft 9e and the nozzle holder 9j are formed ~1 with air passages, respectively therethrough for blowing 22 compressed air from a compressed air supply controller 4f ~ of the blow-molding machine into the piece P.
24 ¦ T-shaped hole or passage 9k is radially outeardly 1 perforated at the projection of the nozzle holer 9j for making 26 ! contact with the orientation pin 4e to communicate with an 27 air passage 9m formed elevationally within the core shaft 9e, 28 which passage 9m is opened with splined groove -like openings ~9 9Q perforated substantially over the entire length of the core shaft 9e.

1154~320 1 The splined groove-like openings 9Q thus opened with 2 the passage 9m to communicate with the interior of the piece 3 P held by the jig 9 are advantageously perforated or formed 4 to eliminate an insufficient m,echanical strength of the long orientation core shaft 9e to ble caused by the air passage 9m 6 if the core shaft 9e is perforated entirely in hollow 7 $tructure slnce the compressed air blowing pressure for 8 radially orienting the piece P becomes at a maximum 50kg/cm2 9 as considerably high pressure and also to eliminate partial blowing of ~he compressed air in blow-molding operation so 11 1 as to thereby overcome an apprehension of fomring recesses 12 1 on the wall surface of the piece P due to compressed air jet.
13 1 ~
14 ! The heating unit 1 is constructed to uniformly heat the entire pieces P supplied in cooled state from the injection 16 molding machine to the temperature capable of biaxially 17 orientation blow molding. The heating unit 1 equi-distantly 18 supports a number of jig holders 2 for holding a number of 19 -jigs 9 at the peripheral Pnd of the turntable 1n formed with a rack 10 at the perlpheral end thereof by means of magnetic 21 attracction.
22 A cover 1b is provided to coat almost all the rotary movement line integral with the turntable 1n of the jig 24 holders 2 to shut it off the exterior so as to thus Eorm a heating chamber 1a 26 The heating chamber 1a is internally divided into 27 a plurality of heating zones 1c separately controlled along 28 ¦ the moving path of the jig holers 2 so as to stepwisely heat 29 the pieces P.
~ plurallty of lateral heating rods le ltwo in the i ~ 9~
1 embodiment shown) are disposed at one side ~inside in the 2 embodiment shown in Fig. 5) along the moving path of the 3 jig holders 2 at every heating zone 1c in the heating chamber 4 1a, and a number of heating rods 1d are longitudinally disposed at the other therein.
6 I Waste heat damper units 1f are provided on the upper 7 ¦¦ surface of the cover 1b of the respective heating zones 1c, 8 ¦ and consists of a set of two waste heat cylinders 1g for 9 ¦ externally opening the interior of the heating æones 1c~ and ¦ dampers 1h supported at a shaft 1i for controlling the opening 11 , or closing operation of the cylinders 1g with the shaft 1i 12 l¦ connected to a drive unit 1j.
13 Ij The temperatures in the respective heating zones 1c of 14 I the heating chamber la re detected by thermostats 1k separately iI provided within the zones 1c, which produce detection signal 16 I to a controller 1~, which thereupon generates a commnad for 17 I driving the drive unit 1j so as to control the opening or 18 ~ I closing operation of the respective dampers 1h to thereby 19 control the tempPrature within the heating zones 1c at set value.
21 1 The respective heating zones 1c are so arranged along 22 ¦ the moving path of the jig holders 2 as to be in the order 23 l of the heating zones 1c1, 1c2, 1c3, 1c4, which are, for example, 24 ¦ heated at the set temperatures within the heating zones as ~ below.
26 1 Heating Zone lc1: 140 to 160C.
27 Heating Zone lc2: 160 to 180C.
28 ~ Heating Zone 1c3: 180 to 220C.
29 Heating Zone 1c4: 160 to 200C.
The heating rods 1d, 1e are so disposed as to be divided I ~.~S4~
1 into lateral and elevational attitudes, respectively so that, 2 when the pieces P are moving while rotating within the heating 3 chamber la, only the heating rods le of lateral attitude are 4 rotated, namely, when the jig holders 2 are rotated around the center of the heating unit 1 integrally with the turntable 1n, 6 the rotary portions of the jig holders 2 are accordingly rotated 7 according to the turning operation of the turntable 1n upon 8 engagement of the pinion gear 2j with the rack 1q of the 9 stationary table 1p to theraby rotate the jigs 9 held by the jig holders 2.
11 The turning ooeration of the turntable 1n is carried 12 l, out by transmitting the rotary force of th~ motor 13 through 13 ~ a reduction gear 14 to an exclusive reduction gear 1u, 14 1 through a drive gear ~s secured to tha output shaft 1t of the lS I reduction gear 1u to a rack 10 formed on the peripheral end 16 ¦ of the turntable 1n via an engagement therebetween.
17 ¦ The jig holder 2 magnetically attracts, as described 18 ~ above, the jig 9 at lts cylindrical portion 9g for holding 19 the piece P to rotate around the heating unit 1 while turning around its own axis along with the rotation of the turntable 21 1n and to be secured to the peripheral end of the turntable 22 1n at a frame 2a of hollow cylindrical shape.
The mounting frame 2a ls opened at the top, and is also 24 11 opened via a rack hole 2b at the lower end.
ll There are provided a cylinder 2d via bearings 2c, and 26 1 a vertical shaft 2h elevationally movably but not rotatably 27 1 assembled within the cylinder 2d within the frame 2a.
28 The cylinder 2d is so inserted into substantially the 29 entire length of the frame 2a as to be rotatably assembled 1 30 via the bearlng6 2c at the ~er and lo~er ends with frame 4~2(~

1 ~l 2a with a guide hole 2n o~ vertical length perforated at the 2 ll cylindrical wall portion disposed between the upper and the 3 ll lower bearings 2c.
4 ,' A supporting holder 2e is integrally stood from the

5 ll upper end of the cylinder 2d projected from the upper end

6 lll f the frame 2a so as to be partly extended upwardly from the

7 !~ cylindrical wall of the cylinder 2d in such a manner that the

8 ll inner surface thereof is internally curved with the curvature

9 ll substantially equal to the outer peripheral surface of the ,I cylindrical portion 9g of the jig 9.
11 A permanent magnet piece 2f is irnplanted into the upper 12 .I portion of the supporting holder 2e for magnetically attracting 13 the jig 9 at the cylindrical portion 9g. Since the support 14 `, holder 2e has higher height than the cylinder portion 9g of ll the jig 9, the ji~ 9 attracted to the support holder 2e is 16 l,, so positioned at the bottom end surface of the cylindrical 17 jl portion 9g as to be separate from the upper end surface of 18 1; the cylinder 2d.
19 ll The jig holder 2 elevationally movably mounts an ¦1 elevational shaft 2h within an axial hole 2g formed within the 21 1I cylinder 2d, namely, in the internal space in the cylinder 22 ll 2d, which shaft 2h is extended downwardly at the bottom end 23 I thereof from the axial hole 2g through the rack hole 2b under 24 I, the mounting frame 2a.
I The jig holder 2 also incorporates a movable pin 2i ~i6 l¦ movably enyaged within the guide hole 2n of the elevational 27 1l shaft 2h at the position facing with the guide hole 2n ~o be 28 ~I secured in radially projected manner, which pin 2i is so 29 ¦I movably engaged within the guide hole 2n that the shaft 2h may be elevationaLly ~ovable with respect to the cyllnder 2d I IL~L5~2~
1 but be impossible to rotarily displace.
2 The jig holder 2 also incorporates a roller 2k mo~nted 3 at the bottom end of the elevational shaft 2h downwardly 4 projected under the frame 2a in such a manner that, when the S ¦ shaft 2h is moved to the lower limit immediately above the 6 jl roller 2k, a pinion gear 2j is integrally formed to engage 7 ll¦ in mesh with the rack hole 2b at the position out of the 8 j~ frame 2a.
9 1I The jig holder 2 also lncorporates a ~ompression spring ¦¦ 2m so assembled between the cylinder 2d and a vable pin 2i protruded through the hole 2n within the frame 2a that 12 Il the cylinder 2d is engaged therewith to always urge elastically 13 ll the shaft 2h to be disposed at the lowermost position with 14 ,I respect to the cylinder 2d.
1 ~
16 ll The attitude controller 3 is constructed to con~rol 17 ~I the rotary attitude of the cylindQr 2d and vertical shaft 18 2h combination so that the inside surface of the supporting 19 holder 2e accurately directs externally of the turntable 1n when loading the jig 9 to the jig holder 2 and unloading it 21 from the jig holder 2, and consists of two intermittently 22 revolving gears 3b, a chain 3c for transmitting the rotary 23 1l force to the gears 3b, a cam unit 3g for rotating the year 24 j~ 3b, and a cam plate 3h as essential components.
l¦ The gear 3b is so rotatably assembled within the 26 l~ turntable 1n in the recess 3a perforated at the turntable 1n 27 ~ in circular flat shape partly opened with the peripheral end 28 1l of a stationary table 1p on the bakc surface of the table 1p 29 I secured oppositely to the position behind the position for ¦ unloading the jig 9 from the jig holder 2 along the moving !

llS4~0 l 1~ path of the holder 2 and before the position for loading 2 the jig 9 to the jig holder 2 that the teeth formed at the 3 1 peripheral end are partly elevationally coincident to the 4 1 rack 1q of the table 1p.
ll More particularly, the gear 3b is so set at the position 6 I with respect to the rack 1q that the pinion 2j engaged with 7 1¦ the rack 1q of the stationary table 1p brings into mesh with 8 ¦¦ the teeth of the gear 3b according to the motion of the table 9 ~¦ 1n or vice versa.
ll The rack lq ia not formed at the peripheral end portion of the stationary table 1p between the gears 3b corresponding 12 ll to the gear 3b~
13 ,I That is, the rack 1q of the stationary table 1p is so 14 l¦ formed to the position that the pinion 2j is transferred from ',l the table 1p to the gear 3b or vice versa in engagement accordin~
16 ~ to the turning operation of the turntable 1n.
17 ~ A drive gear 3d is coaxially integrally secured to both 18 ll the gears 3b with a chain 3c engaged with the drive gear 3e l9 1¦ secured to the output shaft 3f of the cam unit 3g operated via ¦ the reduction gear 14.
21 ¦ The cam plate 3h is disposed directly under the moving 22 ¦ path of the jig holder 2 between the gears 3b to raise the 23 I vertical shaft 2h against the tension of the spring 21 so as 24 I to allow the pinion 2j in engagement to transfer from the gear i 3b to the rack hole 2b in order to statlonarily hold the attitudf 26 i of the supporting holder 2e with respect to the tuxntable 1n 27 ll when the supporting holder 2e is transferred from the rack 28 l¦ 1q of the stationary table 1p to the gear 3b to then hold 29 ~¦ the predetermined attitude~
¦ In this case, the elevational shaft 2h thus lifted . ~

~ 4 -I 1~5~
1 impacts the bottom end of the jig 9 held magnetically by the ~ support holder 2e to slightly move the jig 9 upwardly.
3 This slight upward movement of the jig 9 can be safely and 4 exactly achieved by the operation that the piece P held by the jig 9 is loaded from the heating unit 1 ~o the loader 6 6 in such a manner that the disk portion 9f of the jig 9 7 may not impact the holdin~ arm 6b of the loaded 6.
8 A clearly understood from Fig. 9, the roller 2k at the 9 ~ lower end of the vertical shaft 2h rides on the oblique surface 1 of the cam plate 3h to be urged onto the surface as it is 11 I until the pinion 2j is brought into mesh with the rack hole 2b 12 j when the pinion 2j is transferred from the rack 1q of the 13 ,I stationary table 1ponto the ge~r 3b to cause the supporting 14 ll holder 2e to become in predetermined attitude to start rotating 1 integrally with the t~rntable 1n. When approaching the 16 ¦ position for r4ceiving the jig 9, the vertical shaft 2h is 17 l lowered by the tension of the spring 21 along the oblique 18 l surface of the cam plate 3h to cause the pinion 2j to be I9 ¦¦ brought into mesh with the gear 3b.
¦ Therefore, the supporting holder 2e is continuously 21 ll held in predetermined attltude set at least within the range 22 ¦¦ of the position of the cam plate 3h.
23 I The cam uni.t 3g receives a continuously rotating input 24 ! from the reduction gear 14 and outputs an intermittently ¦ rotating power to the output shaft 3f so as to intermittently 26 ,I rotate the intermittently rotatable gear 3b by the input 27 !l at predetermined timing in the angular amount of predetermined 28 ~I central angle.
29 ¦I The intermittently rotating or revolving opexation of ~ the gear 3b together with its tlming will now be descr~bed Il - 25 -4C~2~
1 1 in detail.
2 , The gear 3b disposed at the unloading side of the jig 3 9 starts rotating in the same direction as the support 4 holder 2e immediately before the support holder 2e rotating , around its own axis becomes predetermined attitude that i-t 6 I directs at the inside surface thereof outwardly ater the 7 I pinion 2j completely transfers from the rack 1q of the 8 l stationary table 1p to the gear 3b side, and reaches an 9 equal peripheral speed to the moving speed of the jig holder 0 'I 2 when the support holder 2e rotating around its own axis becomes the predetermined attitude that it directs at the 12 inside surface thereof outwardly to then continue its rotation 13 at the peripheral speed for predetermined time.
14 Since the gear 3b rotates at equal speed to the moving speed of the jig holder 2 at the peripheral speed as was 16 described previously, the elevational or vertical shaft 2h 17 and cylinder 2d combination engaged of the pinion 2j with 18 , the gear 3b becomes the state stopped with respect -to the 19 turntable ln to thereby effect that the support holder 2e is held in predetermined attitude with respect to the 21 turntable 1n.
22 When the gear 3b thus performs, upon rotation thereof, ~ to allow the support holder 2e to be held in predetermined 24 attitude, the elevational shaft 2h is lmmediately liEted by the cam 3h to transfer the pinion 2j in engagement from the 26 gear 3b to the rack hole 2b so as to mount to hold the shaft 27 ` 2h and cylinder 2d combination in a manner impossible to 28 rotate with respect to the turntable 1n while holding the 29 attitude of the support holder 2e as predetermined.
' The gear 3b will stop its rotation short time after ,, , - 26 ~

2~ ~
1 the pinion 2j is transferred in enyagemen-t from the gear 3b 2 1I to the rack hole 2b.
3 ,l, On the other hand, the gear 3b thus disposed at the 4 1l loading side of the jig 9 starts its rotation in the same ;I direction as the jig holder 2 from about the time when the 6 i roller 2k starts lowering on the oblique surface of the cam 7 ' plate 3h, and becomes at equal peripheral speed to the moving 8 l, speed of the jig holder 2 when engaging in mesh with the pinion 9 ` 2j projected from the rack hole 2b upon downward movement of '. the elevational shaft 2h.
11 . The gear 3b slightly rotates while engaging in mesh 12 with the pinion 2j, stops its rotation at the position where 13 the rack 1q becomes coincident elevationally to the teeth of 14 the gear 3b immediately before the pinion 2j makes engagement ', with the rack lq of the stationary table 1p, and transfers 16 ~ the engagement with the pinion 2j from the gear 3b to the 17 rack 1q of the stationary table 1p.
1 18 l In the drawings as exemplified in the preferred 19 I embodiments of the present invention, the rotating timing and `~ angular amount of the gears 3b, 3b are entirely the same with 21 i each other.
22 1 In order to rotate the support holer 2e to be disposed ~ ,' at predetermined attitude where the support holder 2e directs 24 ~~I its inner surface outwardly at preferred timing immediately 25 , after the pinion 2j is engaged rom the rack 1~ of the stationary 26 table 1p to the gear 3b, predetermined relationship is se-t among the number of teeth of the rack 1q of the stationary 28 table 1p, the number of teeth of the pinion 2j, and the 29 1~ position of the gear 3b.
It is also noted that the jig 9 is unloaded from the "

ll 4~2~
,j 1 ll heating unit 1 after the elevational shaft 2h is competely 2 ll lifted by the cam plate 3h and that the jig 9 is loaded to the 3 ,I heating unit 1 in the vicinity before the pinion 2j is !l engaged in mesh with the gear 3b.
. *BLOW MOLDING MACHINE ~Figs. 1, 11 to 13) 6 ll, The biaxially orientation blow molding machine 4 is 7 ll constructed to load the piece P uniformly heated as assembled 8 ll with the jig 9 ~o the blowing mold 4a, to biaxially orient the 9 ~~l piece P by means oE the orientation cam unit 10 as will be , hereinafter described in greater detail, to blow compressed ll air into the piece P by the operation of a compressed air 12 supply controller 4f to radially oeient the piece P for a container 13 product S, and to then cool and solidify the product S, and 14 ~ consists of a turntable 4g, twelve blowing molds 4a equi-distantly ., attached to the peripheral end of the turntable 4g, a shaft 4i 16 i as the rotatable shaft of the turntable 4g, a rack table 4h 17 ,, integral with the turntable 4g, and a reduction gear 4~ as 18 li essential components.
"
~ Each of the twelve blowing molds 4a equi-distantly 20~ . installed at the:peripheral end of he turntable 4g as exemplified 21 l, in the preferred embodiment consists of split dies 4b horizontally 22 openable like to open the pag~ of a book around an openable ~ :~ shaft 4d as an axis as the portion for assembling the molds 24 4a with the turntable 4g, and bottom die 4c for forming the : bottom of the product S.
26 ' There is provided a compressed air supply controller 4f 27 . for blowing the compressed air into the piece P through the 28 ,I jig 9 assembled with the mold 4a at the position directly 29 'I under the mold 4a, which controller 4f raises a nozæle tip '1 4m to the lower end of the cylindrical portion 9g of the jig 9 . ~ , ', - 28 -!l I
.; , .

1 l, assembled with the mold 4a to airtiyhtly attach it under 2 1I pressure thereto to enable blc)wing of the compressed air from 3 1l the lower end opening of the cylindrical portion 9g into the 4 11 cylindrical portion gg immediately after completing the 1 closure of the blowing mold 4a.
6 I The controller 4f consists of an orientation pin 4e 7 ,l elevationally movably coaxially assembled with the no~zle tip 8 l,~ 4m through itself, and an orientation core shaft 9e provided 9 " directly under the jig 9 assemblad with the mold 4a in such ~ ll a manner that the pin 42 may enter at the upper end from the 11 ~ lower end opening of the cylindrical portion 9g of the jig 9 12 assembled with the mold 4a into the cylindrical portion 9g to 13 , thereby push up the core shaft 93.
14 The turntable 4g is rotatably assembled via the bearings ~ with the shaft 4i fixedly stood on the floor integrally with 16 l' the rack table 4h at the lower end of a cylinder.
17 Rack is formed at the peripheral end of the rack table 18 4h staying in mesh with the rack table 4h at the drive gear 19 4j secured to the output shaft 4k of the reduction gear 4~ for transmitting the rotary force from the motor 13.
21 ~ The blowing mold 4a in the blow molding machine 4 22 ~l opens both split molds 4b by a cam mechanism (not shown) ~ immediately before the position for unloading the jig 9, 24 simultaneously lifts the bottom mold 4c, maintains the opened split mo:Lds 4b until the jig 9 reaches the loading position, 26 and closes the split molds 4b about simultaneously when the 27 ~ jig 9 is loaded.
28 `I After the split molds 4b are thus closed tightly, the 29 ; mold 4a is urged onto the bottom end of the cylindrical portion ', 9g of the jig 9 assembled with a nozzle tip 4m therewith.
1, , i !

"

1 ~5~32~ 1 1 ¦l An orientation cam unit is then operated to lift the orientation ¦
2 I pin 4e to thereby lift the orientation core shaft 9e upwardly 3 I so as to thereby axially orient ~he piece P.
4 11 The compressed air supp].y controller 4~ is operated 5 11 after competing the axial orientation of the piece P or 6 1I simultaneously upon the orientation of the piece P to blow 7 . the compressed air into the piece P so as to radially orient 8 ,I the piece P to thus complete the biaxial orientation blow g ll, molding of the piece P into a final product s such as a bottle-, shaped container.
11 , When the product S is thus completed, it is sufficiently 12 cooled and thereby solidified, and is discharged with the 13 compressed air thus blown thereinto at suitable timing until 14 ~l the jig 9 reaches the position for unloading it.

16 ; The loading and unloading unit 5 is constructed to load 17 . the piece P in downward neck portion attitude to the jig 9 18 ,' and to unload the container product S thus molded from the 19 ~I blow molding apparatus out of the apparatus, and consists of 20 . Ii a turntable 5a, holding pieces Se, and a reduction gear 5d 21 ll as essential components~
22 The turntable 5a is rotatably assembled through bearings 23 l 5j with the shaft 5i as rotating axis as stood at the base 24 '' plate 5h as a base.
25 I Twelve holding pieces 5e disposed with permanent magnet 26 piece 5f retained on the holding surface thereof for holding 27 ,I the jig 9 in recessed surface with the curvature equal to the !
28 ,, outer diameter of the cylindrical portion 9g of the jig 9 29 equi-distantly secured to the periph~ral end of the turntable 5a.

Il - 30 -, s~
1 1 A rack disk Sg is integrally secured to the turntable 2 ~ 5a via the cylinder with rack formed thereat, and is brought 3 1l into mesh with a drive gear 5b secured to the output shaft 5c 4 ,j of a reduction gear 5d.
5 1l The loading and unloading unit 5 loads the piece P
6 ll to the jig 9, namely to supply the piece P to the apparatus 7 of this invention, and unloads the container product S from 8 1l the jig 9, namely to unload the product s from -the apparatus 9 ll of this invention by using suitable means (not described 1l any further).

12 I The loader 6 is constructed to transfer the jig g 13 ¦ assembled with the piece P heated to uniform temperature and 14 ' supported by the jig 9 by the heating unit 1 from the heating , I unit 1 to the blow molding machine 4 by the rotary motion, 16 ll and consists of a rotor 6a, and a cam unit 6f as essential 17 ' components. I
18 1¦ ~ The rotor 6a is secured to the upper end of the output 19 ¦I shaft 6e of the cam unit 6E with a desired number of holding ¦¦ arms 6b ~three in the embodiment shown) for holding the jigs 9.
21 l, There is formed an end recess portion 6c of recessed 22 ~I surface with the same curvature as that of the outer peripheral 23 ll surface of the cylindrical portion 9g of the jig 9 at each 24 l~ end of the holding arms 6b with permanent magnet piece,6d ! implanted into the bottom surface thereof.
26 I The cam unit 6f is constructed to convert the constantly 27 rotating input from the reduction gear 14 to continuously 28 il rotate the rotor 6a according to the predetermined speed 29 ll variation curves at the speed substantially equal to the 30 ll peripheral speed of the turntable 1n or the moving speed of 1, ~

i , 1~5g~2~ 1 1 1I the jig holder 2 at the end of the holding arms 6b when the 2 ¦I holding arms 6b are located at the position for loading the 3 ¦I j ig 9 to the arm 6b from the heating unit 1 and also to the 4 ~I peripheral speed of the turntable 4g or the moving speed of I the mold 4a at the end of the holding arms 6b when the holding 6 1 arms 6b are located at the position for unloading the jig 9 7 1l to the blow molding machine 4.

8 il ~UNLOADER 7 ~i~s. 1, 4 and 20.~ !
Il l 9 j, The unloader 7 is constructed to transfer the jig 9 ll supporting the container product S biaxially oxientation 11 " blow-molded by the blow molding machine 4 from the blow molding ~

12 machine 4 to the loadinq and unloading unit 5, and is fundamentally 13 , entirely the same as that of the loader 6 except for that the 14 ~~. length of the holding arms 7b is alightly longer than that of lS ~¦ the loader 6 16 1I That is, the unloader 7 consists of a rotor 7a for 17 l equi-distantly attaching desired number of holding arms 7b 18 I at the top of the output shaft 7e of the cam unit 7f, and 19 ' permanent magnet piece 7d implanted onto the bottom surface of 20 ll the recess portion 7c of the holding arm 7b.

21 ,ll The cam unit 7f is constructed to convert the cons-tantly 22 ,I rotating input from the reduction gear 14 to continuously ~ ll rotate the rotor 7a according to the predetermined speed variation 24 l¦ curves at the speed substantially equal to the blowing mold 4a ~I when the end of the holding arm 7b is located at the position 26 ,, for loading the jig 9 from the blow molding machine 4 and to 27 ~ the holding arm Se when the end of the holding arm 7b is 28 l located at the position for unloading the jig 9 to the loading 29 1 and unloading unit 5.

i, , !

1 ¦ The transfer means 8 ic; constructed to transfer the 2 1l piece P supported a-t the jig 9 in downward neck portion 3 ¦¦ attitude from the loading and unloading u~it 5 to the heating 4 l¦ unit 1 by means of the rotary motion, and consists of a rotor 8e, holding arms 8b, end recessed portion 8c, permanent magnet 6 ¦ piece 8d, output shaft 8e, and a cam unit 8f of the same 7 ~I purpose as those of the loader 6 and unloader 7.
8 ~. The cam unit 8f is constructed to rotate the rotor 8e 9 1 according to the specific speed variation curves equal to those 1¦ of the other cam units 6f, 7f.
11 ' That is, the cam unit 8f of this transfer means 8 is 12 ~' constructed to convert the constantly rotating input from the 13 1I reduction gear 14 to continuously rotate the rotor 8a according 14 ¦I to thè speed variation curves at the speed substantially equal 15 ll to the holding piece 5e when the end of the holding arm 8b is 16 l¦ located at the position for loading the jig 9 from the loading 17 ~j and unloading unit thereto and also to the jig holder 2 when 18 ¦¦ the end of the holding arm 8b is located at the positiin for 19 l¦ unloading the jig 9 th~refrom to the heating unit 1.
l~ In the preferred embodiment exemplified in the drawings, I
21 1I though the rotor 8a of the unloader 8 incorporates in construction 22 ;I four holding arms 8b equi-distantly of central angle disposed, I
23 1I which is thus arranged since the turning speeds of the turntables 24 1l 1n and 5a are slower than that of the turntable 4g as was I described, 26 l, ~
27 ll Fig~ 23 shows one example of the rotating speed variationl 28 l! curves of the respective rotors 6a, 7a and 8a.
29 In Fig. 23, the curve A indicates the speed variation 1l curve of the rotor 6a, and the curve B that of the rotor 7a, ~l I
i4~2(~

l ll and the curve C that of the rotor 8a.
2 ¦I The speed variation curves in Fig. 23 are not drawn 3 ~1 in case that the rotors 6a, 7a and 8a are rotated in the same 4 !i amount within the same period as standard, but are drawn along '' the time flow commonly with the operation of one loading and 6 1 unloading of the jig 9 at respective rotors 6a, 7a and 8a.
7 11 In the embodiment shown, the rotors 6a, 7a with three 8 ll holding arms 6b, 7b, respectively, therefore, rotate 120 of 9 ¦I central angle from the time to to next time to~ however, the ji rotor 8a with four holding arms 8b rotates 30 of central angle ll from the tim~ to to the next time to.
12 The mutual timing relation upon transfer of the jig 9 13 1 of the rotors 6a, 7a and 8a can be set suitably at the 14 I standard, and in the embodiment shown, it is so set that the ~¦ jig 9 is transferred from the loader 6 to the blow molding 16 l' machine 4 at the time t1~ and the jig 9 is transferred by 17 I the unloader 7 from the blow molding machine 4 at the same 18 ¦j time t1.
19 1I The standard value of the rotating speeds of the rotors 1l 6a, 7a and 8a can be suitably se-t, and in the embodiment shown,¦
21 lll there are so set the speed Y1 equal to the moving speed of the ~2 l! blowing mold 4a as the standard at the end of the holding arm 6b in case of the rotor 6a, the speed V1 similarly in case of j the rotor 7a to the rotor 6a, and the speed V2 equal to the 25 Ii. moving speed of the holding piece 5e at the end of the holding 26 arm 8b in case of the rotor 8a.
27 More particularly, the rotor 6a is normally rotated at 28 the peripheral speed V1 substantially equal to the peripheral 29 ll speed of the turntable 4g, however, when the end of the holding I' arm 6b approaches the position for receiving the jig 9 from Il 1 ~ 34 -1,1 '~ 2~

1 the heating unit 1, its speed is decelerated to the peripheral 2 speed V3 substantially equal to the moving speed of the jig 3 ¦ holder 2, and when it passes through the position for receiving ~ the jig 9, it returns to its original speed V1.
¦ The rotor 7a is normally rotat~d at the same speed V1 as that 6 ¦ of the rotor 6a, however, when the end of the holding arm 7b 7 ¦ approaches the position for transferring the jig 9 to the 8 ¦ loading and unloading unit 5, it is decelerated to the speed V2 9 ll sub~tantially equal to the moving speed of the holding piece ~.¦ 5e, and when it passes through the position for transferring 11 ~ the jig 9, it returns to its original speed V1. Then, the 12 , rotor 8a is normally rotated at the speed V2, however, when 13 i the end of the holding arm 8b approaches the position for 14 ,I transferring the jig 9 to the heating unit 1, its speed is l¦ decelerated to the speed V3, and when it passes through the 16 ¦ position for transferring the jig to the heating unit 1, it 17 ,I returns to the original speed V2. These operations are repeated 18 il in rotating speed variations.
19 ll Referring now to Fig. 24, the jig 9 assembled with ¦ the piece P heated to uniform temperature is fed to the position !
21 ll for transferring to the blow molding machine 4 by the loader 6 22 ¦1 at the time t1l where the jig a is transferred to the blowing ~ ¦I mold 4a, and the jig c assembled with the container product S
24 ,i biaxially orientation blow molded reaches the position for I transferring it from the blow molding machine 4 to the unl.~ader 26 j 7 to thus transfer the jiy c to the unloader 7.
27 ~ The next jig b transferred from the heating unit 1 to 28 1I the loader 6 is moving toward the blow molding machine 4 at li 2~ ,I the time t1~ where the residual holding arms 6b of the loader ll 6 is moving toward the position for receiving the jig 9 from ., , lll ~ 35 -.~
~
~ 49~

1 l the heating unit 1.
2 ll Similarly, the jig d trainsferred by the unloader 7 3 1l already from the blow molding machine 4 is moving toward 4 ,I the loading and unloading unit 5.
Then, the jig e held by the loading and unloading 6 li unit 5 is located immediately before the position for 7 ,' transferring to the transfer means 8, while the jig f held 8 ! by the transf0r means 8 is moving toward the position for 9 ' transferring to the heating unit 1.
.I When it is elapsed from the time t1 to the time t2, 11 I referring to Fig. 25, the jig e held by the loading and 12 ' unloading unit 5 reaches the position for transferring to be 13 I transferred to the transfer means 8.
14 ll Accordingly~ at the time t2, the loader 6 holds only ., one jig b of three holding arms 6b, while the unloader 7 16 l¦ holds two jigs c and d by the holding arms 7b, and the 17 l transfer means 8 holds three by the three holding arms 8b.
1i .
18 , When it is passed from the time t2 to the time t3, 19 , referring to Fig. 26, the holding arm 6b of the loader 6 . reaches the position for receiving the jig ~ from the heating 21 li unit 1 to thus receivP the jig ~.
22 I When it is elapsed from the time t3 to the time t4, ~ ll referring to Fig. 27, the jig d held by the unloader 7 reaches 24 I the position for transferring to the loading and unloading 1 unit 5 to transfer the jig d to the loading and unloading unit 5 26 When it is slightly passed from the time t4 to the 27 , time t5, now referring to Fig. 28, the jig f held by the 28 transfer means 8 reaches the position for trasnferring to the 29 'I heating unit 1 to transfer it to the heating unit 1.
30 ll Thus, the loader 6, unloader 7, and transfer means 8 Il - 36 -1 receive one jig 9 within predetermined time from the time to 2 to the time to and simultaneou.sly feed out always one jig 9.
3 This operation is entirely the same as the loading and 4 unloading unit 5 and the heating unit 1, blow molding machine 4.
j It should be understood that since one jig 9 is always 6 ¦j fed out if one jig 9 is rec~ived by the respective units 1, 4, 7 ¦¦ 5, 6, 7 and 8 within predetermined time, the units 1, 4, 5~ ~, 8 ~ 7 and 8 can continusouly operate during the above predetermined 9 ¦! time as one cycle~
~ It is noted that the moving speeds at the ends of the holding arms 6b, 7bj 8b of the loader 6, unloader 7 and transfer 12 ' means 8, respectively are ideally preferred to be equal to those¦
13 l of the jig holders 2, blowing mods 4a or holding pieces 5e of !i 14 1! the heating unit 1, blow molding machine 4 and piece loading and l~ unloading unit 5, respectively facting therewith at the loading 16 ,~ and unlaoding times of the jigs 9 among the heating unit 1, 17 l'l blow molding machine 4 and the piece loading and unloading unit 18 Il. 5 by the loader 6, unloader 7 or transfer means 8, but the jig 19 9 may be actually loaded and unloaded preferably between the lj members facting with each other for loading and unloading it 21 1 even at slightly different speeds therebetween.
22 Il' This operation for loading and unloading the jig g ~ ll between the members facting with each other can be advantageousl~
24 ¦I performed by the provision that the jigs 9 are magnetically !l attracted to be held by the jig holder 2,.holding piece 53 26 l~ and respective holding arms 6b, 7b, 8b and that the guide plates 27 ,1 12 are disposed at the position for loading and unloading th-e 28 I jigs 9 to forcibly unload the jig 9 from the side for unloading 29 ll the jig 9 so as to load the jig 9 to the side for loading the 1l jig under the guidance of the guide plates 12.

, 15~2(~ i 1 j~ It is therefore carried out without fail to transfer 2 ¦¦ the jigs 9 by means of the magnetically attracting force of 3 1I the side for loading the jig 9 to the side for loading ~he 4 1ll j ig 9 even ii both the members for loading and unloading the 1I j ig 9 are slightly displaced at the position for loading 6 ll and unloading the jig 9 in case where the jig 9 forcibly 7 !I separated from the side for unloading the jig 9 via the 8 !I guide plate 12 is located within the range of the magnetically 9 1' attracting force of the side for loading the jig.
li It is preferred to aid this operation to successfully ~ transfer the jig between the ad~acent members facing with 12 l each o~her that the ends of the holding pieces 5e and holding 13 ;' arms 6b, 7b, 8b are protruded slightly in pawl shape at , the side ends thereof but not the rotating side at the time 1! of molding them as the ends of the holding arms 6b as 16 1 exemplified in the preferred embodiment shown in Fig. 19.

18 ll The orientation cam unit 10 is constructed to forcibly l9 ¦1 orient axially the piece P supported by the blowing mold 4a l¦ together with the jig 9 and to forcibly orient the piece P
21 ll along the axial direction by the mechanical strength by 22 1! utilizing the cam construction to thereby set accurately ~ l¦ the time required for orienting the piece P in the required 24 l' amount along the axis and also to eliminate the complicated ~ pneumatic setting, switting, and supply and shut-off controls.
26 ,I The orientation cam unit 10 consists of a guide pole 27 i 1Oa, a passage plate 1Od, a cam plate 10f, and an accelerator 28 ~ 1Oh as essential parts.
29 I The guide pole 1Oa is disposed at the position in the ll vicinity of the position immediately after the completion of ,1 . I
~ - 38 - ~

! r ~ 2~
l ¦ closing the dies after the blowing mold 4a disposed along the 2 moving path of the mold 4a receives the jig g.
3 An elevator lOb is elevationally rnovable assembled 4 ~ with the guide pole 1Oa with a passage plate 1Od secured 1 through the bracket 10c to the elevator 1Ob.

6 ¦¦ As obvious from Fig. 15, the passage plate 1Od is 7 ¦¦ disposed over the length of predetermined rotating rang 8 ¦¦ directly under the moving path of the blowing mold 4a with 9 ¦I the orientation pin 4e downwardly extended through the l¦ compressed air supply controller 4f facing from directly ll I above with the flat upper surface at the lower end.
12 ~l A cam follower 10e is attached, in addition, o the 13 ll elevator 1Ob to slidably make contact from above with the 14 ll peripheral surface of the cam plate 10f secured to the output I shaft 10g of the accelerator 1Oh.
16 Ij The accelerator 10h allows the input gear 1 oQ secured 17 ~, to the input shaft thereof with the rack table 4h of the 18 iI blow molding machine 4 so as to input the rotary force from 19 ~l the rack table 4h.
¦ In the preferred embodiment exemplified in the drawings, 21 il since the cam plate 10f is so constructed as to achieve one 22 ¦1 orientation upon one rotation thereof, it rotates one ~ ll revolution every time the rack table 4h rotates one-twelfth 24 l~ of its rotation.
?5 l Accordingly, the passage plate 1Od has a length of 26 , shorter than approx. one-twelfth of the trace of the moving 27 I circle of the blowing mold 4a.
28 j The piston rod of a return cylinder 1Ok secured onto 29 1l the floor surface is coupled at the end thereof with the ,1 elevator 1Ob so as to thereby exactly lower to return to i, ' ~ 39 - I
l! !

;l l ~5fl~

1 the original position by the operation of the cylinder 1Ok 2 after the elevator 1Ob is raised by the cam plate 10f.
3 There is dormed a lowering passage 10~ directly under 4 1I the moving path subsequent to the orientation step zone as l~ described previously in the blowing mold 4a so as to lower to 6 11 return the orientation pin 4e thus lifted to the original 7 ~ pOSition, 8 111 More particularly, there is provided a stationary 9 1I passage plate 1Om so secured onto the passage plate 1Od ll disposed at the raised limit at the height of the same as the ll ¦ passage plate 1Od to form the lowering passage 10~ in 12 combination of the stationary passag~ plate 1Om and the guide 13 ~I plate 1On.
14 ~i In the preferred embodiment exemplified in the drawings, ,l since the orientation pin 4e must be slidably moved at the ,l 16 bottom end thereof with respect to the passage plate 1Od for 17 lifting the orientation pin 4e ln contact with the bottom end 18 ~ of the pin 4e, a roller 10j is so attached to the bottom end 19 ~ of the pin 4e as to perform smoothly slidably movement of '` the pin 4e and smooth transfer of the pin from the passage 21 1I plate 1Od ~o the stationary passage plate 1Om in such a manner 22 l' that the roller 10j is operated like a cam follower to forcibly ~ l lower to return the pin 4e to the origlnal position by passing 24 the roller 10j as engaged with the lowering passage 10Q formed 25 iI between the stationary passage plate 1Om and the guide plate 27 'I It is naturally be provided that the roller 10j thus 28 1, lowered along the lowering passage 1 oQ is located in height 29 l¦ on the upper surface of the passage plate 1Od thus lowered.
'I ~ ~

l~

l The brake unit 11 is constructed to stop the entire 2 machine oE this invention when certain accident occurs in 3 emergency, and to shut off the power supply of -the motor 13 4 certainly when this brake unit 11 is operated.
I This brake unit 11 is assembled wi~h the blow molding 6 il machine 4 incorporating a number of large and heavy blow 7 ¦ molds 4a, and consists of an electromagnetic brake 11c rigidly 8 ¦¦ secured to the loor, a gear 11a secured to the input shaft 9 1 11b of the brake 11c and brought into mesh with the rack 1I table 4h.
Since -the blow molding machine 4 revolves the large 12 , and heavy blowing molds 4a attach~d in numerous number to 13 I the turntable 4g at the peripheral end faster than the 14 ~ turntables 1n, 5a of the other units, it has the largest ¦ inertia. I
16 I Accordingly, it has large possibility of breaking 17 1I the bearings, gears and reduction gea int0riors due to the lB ¦ large inertial force of the turntable 4g even if the turntable 19 ¦ 1n or 5a is, for example, braked to indirectly brake the turntable 4g and occurs an accident that the turntable 4g is 21 delayed in stopping even if the other turntables 1n, 5a are 22 1l stopped. In case when such an accident occurs, the rotating ~ l¦ position timings among the jig holders 2, blowing molds 4a 24 1l and holding pieces 5e set at the respective turntables 1n, ~l 4g, 5a, respectively are malfunctioned to cause impossible 26 !I smooth transfer of the jigs 9 among the units by the loader 6, 27 1 unloader 7 and transfer means 8.
28 ~I However, the heating blow molding machine of the present 29 il invention is advantageously constructed to mount the brake ¦¦ unit 11 at the blow molding machine 4 to directly brake the il I
4~
l ~¦ turntable 4g so as to stop it to thereby ~liminate the 2 1l affection of the large intertial force of the turntable 4g 3 ¦¦ to the other turntables 1n, 5e to cause erroneously stopping 4 I position of the turntables 1n, 5a but to allow stoppage of ll the turntables 1n, 5a while maintaining its normal stopping 6 ¦ position.
7 ~ *OPERATION
_ -.
8 l The operation of the apparatus of this invention will 9 ¦I now be described in the sequence according to the moving I path of one jig 9, l1 , When the jig 0 held by the loading and unloading unit 12 ~ 5 reaches the position for loading as designated by the mark 13 1 "x", the piece P supplied from the injection molding machine 14 ll by suitable holding means (not shown) is rigidly assembled 15 ll with the jig 9 in downward neck portion attitude.
16 i The jig 9 thus assembled with the piece P is rotarily 17 l, moved with the turntable 5a to be transferred by the transfer 18 1I means 8 to the heating unit 1.
l9 ll The jig 9 held by the jig holder 2 of the heating unit 1 ¦
20 ll is fed into the heating chamber 1a while rotating around its 21 ll own axis as the turntable 1n is rotated, and is uniformly heated 22 ll to predetermined temperature at the entire piece P while ~ ~I passing through the respective heating zones 1c of the heating 24 ¦I chamber la. Thus, the piece P is assembled from the heating 1¦ unit 1 to the blowing mold 4a of the blo~ molding machine 4 26 I by the loader 6 in the state that the rotation around its 27 l, own axis is stopped by the attitude controller 3.
28 l¦ When the blowing molds 4a receives the jig 9 at the blow 2~ ¦I molding machine 4, its dies are tightly closed immediately.
1 After the completion oE the closure of the dies of the mold 4a, , !l !

!
~5~5~2~

1 Ij the compressed air supply controller 4f is immediately operated ¦
2 1 to urge the nozzle tip 4m onto the lower end of the cylindrical I
3 1 portion 9g of the jig 9 held by the mold 4a. The passage 4 plate lOd of the orientation cam unit 10 simultaneously starts 5 ll raising in parallel with the depression of the nozzle tip 4m 6 to thereby push up the orientation pin 4e so as to forcibly 7 , orient the piece P axially and to feed the compressed air 8 i from the nozzle tip 4m through the cylindrical portion 9g g and the hole 9k and the passage 9m into the piece P immediately l, after or simultaneously upon the orientation by the pin 4e by 11 I the operation of the compressed air supply controller ~f 12 ' so as to radially orient the piece P for blow molding.
13 ; The passage plate 10d for pushing up the pin 4e is 14 'I lowered to the original position after moving from the plate 15 ll 1 Od to the passage plate 1Om separately from the orientation 16 l blow molding of the piece P.
17 Il The orientation pin 4e for disposing the roller 10j 18 I onto the passage plate 1Om enters the roller 10j into the 19 ~i lower passage 10~ according to the rotating operation of the il turntable 4g so as to forcibly lower to the original position.
21 ~! The blowing mold 4a biaxially orientation blow molding 22 1l the piece P by means of the orientation pin 4e and the compressed 23 air to the container product S cools and solififies the product S while the jig 9 is transferred to the unloader 7, 25 ll and discharges the compressed air thus charged into the piece 26 into the atmosphere at suitable time.
!l i 27 1,1 The jig 9 supporting the molded product S is transferred 28 .I from the blowing mold 4a to the unloader 7 at the position 29 'I for transferring to the unloader 7, which transfers the product ~ into the loading and unloading unit 5, , , i Il - 43 -~ 54 ~
1., 1 1 ,¦ The jig 9 supporting the product S and transferred to 2 ¦I the loading and unloading unit 5 unloads only the product S
3 11 at the position for unloading the product S as designated by 4 ~ an arrow Y in Fig. 1 by me~ns of suitable product pickup uni 1 (not shown) provided integrally with the unit 5 or in the 6 I vicinity of the unit 5, and rotarily move together with the 7 I turntable 5a as it is to again return to the position for 8 1l assembling the piece P for completing one circulating conveyance 9 ~ of the piece P.
~ A number of the jigs 9 repeatedly operate the above 11 l circulating conveyance of the pieces P at slightly displaced 12 time.
13 It should be understood from the foregoing description 14 ,I that, since the heating blow molding machine of this invention jl continuously rotates the respective turntables 1n, 4g, and 5a 16 'I and the rotors 6a, 7a, and 8a for circulatingly conveying the I7 ~' jigs 9 at individual intrinsic rotating speeds, it can shorten 18 . the time required to transfer the jigs 9 and repeat no stop 19 ~1 and start to thereby eliminate the vibration during the ,l conveyance of the jigs 9 and to accordingly irregularly 21 separate no jigs 9 from the jig holders 2, holding pieces 5e, 22 ; and holding arms 6b, 7b, 8b so as to thus perform the safe , I
. conveyance of the jigs 9 therethrough.

24 .i It should also b appxeciated that since the heating 1l blow molding machine of this invention rotatably drives the 26 ~ rotors 6a, 7a, 8a rotating according to respective instrinsic 27 I speed variation curves by the exclusive cam units 6f, 7f, 8f, 28 ,I respectively, which are commonly driven -through one reduction 29 " gear 14 by a sole drive power, the rotors 6a, 7a, 8a are readily rotated at preferred synchronous timing to thereby I I , . - 44 -il i 1 !
5i4~

1 simplify the constructiGns of the cam units 6f, 7f, 8f.
2 ~ should also be appreciated that, since the heating 3 ll blow molding machine of this invention does not stop even 4 instantaneously the jigs 9 but always continuously move them ,, along the circular curve for circulating conveyance of the jigs, it can highly mold the pieces P per unit time as fast 7 ,l as twice as compared with thè conventional apparatus of this 8 I type. In addition, since the conveyance itself of the jigs 9 l is very smooth without vibration, the machine of this invention ll does not necessitate various auxi~iary means such as brake 11 il unit, buffer unit, and further timing position correcting unit 12 1 or the like so as to simplify as mjch the entire constructiin 13 of the machine of this invention.
14 ' It should also be understood that since the heating 15 1l blow molding machine o this invention is so constructed as 16 ll to employ the simple rotors 6a, 7a, 8a in the loader 6, unloader~
17 l 7 and transfer means 8, respectively for transferriny the 18 1! i igs 9 among the turntables 1n, 4g and 5a and to rotate the 19 li rotros 6a, 7a/ 8a via the exclusive cam units 6f, 7f, 8f, I
~I respectively according to the predetermined intrinsic speed 21 i curves, it can simplify the conventional complicated 22 ' construction for transferring the jigs among the respective ~ ~l units and can also take preEerred synchronous timing thereamong.

1l !
1, 1 ~ - 45 -

Claims (11)

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:

1. A heating blow-molding machine comprising;
heating means for heating a plurality of pieces injection-molded as preformed pieces at a temperature adapted for biaxially orientation blow molding the pieces and including a turntable for equi-distantly supporting a plurality of jig holders for holding a plurality of jigs at the periphery edge thereof for passing the jig holders through a heating chamber thereof while rotating the jig holders around their own axes, piece blow molding means for biaxially orientation blow molding the pieces thus heated by said heating means into a plurality of products and including a turntable for equi-distantly mounting a plurality of blowing molds at the peri-pheral edge thereof for holding the jigs upon closing thereof, piece loading and unloading means for sequentially continuously receiving the pieces in neck downward position and unloading the products therefrom and including a turntable for equi-distantly disposing a plurality of holding pieces at the peripheral edge thereof for holding the jigs therewith, loader means having a rotor for transferring the jigs from said heating means to said piece blow molding means, unloader means having a rotor for transferring the jigs from said blow molding means to the piece loading and unloading means, transfer means having a rotor for transferring the jigs from said piece loading and unloading means to said heating means, wherein the turntables of said heating means, piece blow molding means and piece loading and unloading means are continuously turned in predetermined intrinsic directions at respective intrinsic constant speeds in predetermined relationship so as to rotate according to predetermined intrinsic speed curves at the speed equal to the peripheral speed of the opposite turntable facing with each other at the moving speeds of the jigs held at the peripheral edge of the turntable when the jigs reach the transfer position of the pieces or products to the opposite turntable.

2. The heating blow-molding machine according to claim 1, wherein the turntables of said heating means, piece blow molding means and piece loading and unloading means comprise a plurality of guide plates at the loading positions of the jigs from the turntable and at the unloading positions of the jigs to the turntables by means of said loader, unloader and transfer means, respectively to perform exact piece or product loading and unloading operations to be disposed along the rotating trace of the turntables for loading the jigs and to partially cross the turning trace of the turntable for unloading the jigs.

3. The heating blow molding machine according to claim 1, wherein said loader, unloader and transfer means comprise respectively cam units driven by a drive source thereof for driving the rotors, respectively thereof to provide the respective intrinsic rotations thereof according to their intrinsic rotation speed curves.

4. The heating blow-molding machine according to claim 1, wherein each of the jigs comprises a mandrel having high magnetic permeability to be magnetically attracted to be held to the jig holder assembled with said heating means, said piece loading and unloading means, said loader, said unloader or said transfer means by means of magnetic attraction.

5. The heating blow-molding machine according to claim 1, wherein each of the jigs comprises an orientation core shaft elevationally movably disposed along the central axis thereof to be lifted by the lifting operation of an orientation pin of said blow molding means to axially orient the piece assembled with the jig, a core top of heat insulating material in the shape of inverted frustum of a cone having an inverted tapered peripheral surface making contact with the bottom of the piece at axially orienting time, and splined groove-like openings perforated substantially over the entire length of the core shaft to communicate with the interior of the piece held by the jig.

6. The heating blow molding machine according to claim 1, wherein said heating means comprises a plurality of heating rods disposed along the moving path of the jig holders at every heating zone of the heating chamber, heat damper units provided at the heating zones for externally opening the interior of the heating zones, and thermostats provided at the heating zones for controlling the operation of the heat damper units to thereby control the temperature within the heating zones, respectively.

7. The heating blow molding machine according to claim 6, wherein the heating rods consists of a plurality of lateral heating rods disposed at one side along the moving path of the jig holder at every heating zone in the heating chamber and a plurality of heating rods longitudinally disposed at the other therein.

8. The heating blow molding machine according to claim 1, wherein the jig holder magnetically attracts the jig for holding the piece and comprises a cylinder inserted thereinto, and a permanent magnet piece implanted into the upper portion of the supporting holder for magnetically attracting the jig thereat.

9. The heating blow molding machine according to claim 8, wherein the jig holder comprises further an attitude controller for controlling the rotary attitude of the cylinder thereof so that the inside surface of the supporting holder accurately directs externally of the turntable of said heating means when loading the jig to the jig holder and unloading it from the jig holder.

10. The heating blow molding machine according to claim 1, wherein said transfer means comprises holding arms equi-distantly disposed of central angle thereof, and a permanent magnet piece.

11. The heating blow molding machine according to claim 1, wherein said blow molding means comprises a brake unit for directly traking the turntable thereof to shut off the power supply of the drive source thereof when the brake unit is operated.