JPS6329539Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an injection stretch blow molding apparatus for plastic products, particularly plastic containers such as soft drink bottles.

This type of plastic container, which is thin and requires pressure resistance, is molded by injection stretch blow molding. In this molding method, molten plastic is first injected into a predetermined mold to create a preformed parison of a predetermined shape, then the parison is kept at a stretching temperature and mechanically stretched in the final mold, while pressure is applied inside the parison. A final molded product with a shape matching the final mold is obtained by blowing and expanding air, but in order to increase the strength and transparency of the final molded product, the parison must be heated below the stretching temperature before blow molding. It is desirable to cool the film and then heat it to the stretching temperature and stretch it.

This method is broadly divided into the cold parison method and the hot parison method as representative methods. In the cold parison method, the parison injection molding stage and the stretch blow molding stage of the parison into the final molded product are performed in separate processes in the above process, and the parison molded in the first stage is once stocked and then transferred to the second stage. Since the two stages are rotated and constitute independent work cycles, their respective productivity is high, but the two processes are separated and automation is difficult. Furthermore, since the parison is cooled to room temperature during storage, the effects of stretch blow molding are enhanced and a high quality product can be obtained. However, the problem is that a large amount of thermal energy is consumed in order to heat the parison, which has been once cooled to room temperature, to the extension temperature again.

On the other hand, the hot parison method is an integrated process in which the injection molding stage for molding the parison and the stretch blow molding stage for molding the final molded product are consecutively performed. It includes a cooling stage for cooling to the drawing temperature and a heating stage for heating to the drawing temperature. In this method, the cooling temperature of the parison is considerably higher than the cooling temperature (room temperature) in the case of the cold parison method, so the consumption of thermal energy required for heating to the drawing temperature can be reduced. However, a problem with this method is that it takes time to cool the parison, which results in longer molding cycle times and lower productivity. On the other hand, if the cooling time is reduced in order to increase productivity, the desired stretching effect cannot be obtained because cooling is not sufficient. Furthermore, when molding a bottle with a small diameter, the radial stretching ratio becomes small, which reduces the pressure resistance of the final molded product. For this reason, it is desirable to keep the stretching temperature as low as possible when forming small-diameter bottles, but this requires setting the parison cooling temperature even lower, which increases the time required for the parison cooling stage and increases productivity. This results in a further decline in sexual performance.

The object of the present invention is to provide an injection stretch molding apparatus that can shorten the molding cycle time and increase productivity in the hot parison method.

A further object of the present invention is to provide an injection stretch blow molding apparatus that can achieve the above objects with a relatively simple structure.

A further object of the present invention is to provide an injection stretch blow molding apparatus capable of molding products of good quality by the hot parison method.

According to the present invention, the above object is to provide a device for clamping a parison mold for molding at least one preformed parison comprising a cavity mold, a neck mold, and a core mold; a device for injecting raw materials into a mold for molding a parison; a device for cooling the parison injection-molded in the mold for parison to a temperature below the stretching temperature; and a mold for molding the parison. a device for heating the extracted parison to a stretching temperature; a device for mounting the heated parison in a stretch blow molding mold; and a device for mounting the heated parison in a stretch blow molding mold. A plastic product comprising a device for stretch blow molding a parison, a device for discharging the final molded product from the stretch blow mold, and a control mechanism for repeatedly operating each device in the above order. In an injection stretch blow molding apparatus, carrying at least two sets of the parison molds and intermittently transporting the parison molds so that each set of the molds sequentially stops at at least two predetermined positions. This is accomplished by an injection stretch-blow molding apparatus characterized in that the mold clamping and injection apparatus is activated when each of the parison molds is stopped at a first position.

Other objects, configurations, and effects of the present invention will become clear from the description of the embodiments with reference to the following drawings.

In FIGS. 1 and 2, the injection molding section is for molding a preformed parison, and the stretch blow molding section is for molding a final product from the parison, both of which are arranged adjacent to each other. In the injection molding section, reference numeral 2 denotes a rotary table rotatably supported on a machine frame 1 by bearings 3, 3, and on the rotary table 2 is a parison molding machine consisting of a combination of a cavity mold 4, a neck mold 5, and a core mold 6. Three sets of molds are placed at equal angular intervals, and among them, the cavity mold 4 is fixed to the rotary table 2. In the illustrated embodiment, four cavities are formed in the parison mold so that four plastic bottle parisons 7 can be simultaneously injection molded, and molten plastic is injected into the bottoms of the four cavities. An injection port 8 is formed for this purpose. Further, three through holes 9 are bored in the rotary table 2 in a coaxial relationship with a cavity-type injection port 8. A ratchet mechanism 10 is provided at the lower end of the rotating shaft of the rotating table 2, and the rotating table 2 is moved by the reciprocating movement of the hydraulic cylinder 11.
rotates in one direction and stops for a predetermined time every time it rotates 120 degrees. The drive mechanism for the rotary table 2 is not limited to the above, and may be any mechanism as long as it can provide the same rotation stopping action.

A mold clamping mechanism consisting of an upper platen 12 and a hydraulic cylinder 13 is provided above one of the parison molds located at position A in FIG. 1 on the stopped rotary table 2. 12 is moved up and down, and when the upper platen 12 is lowered, the parison mold consisting of a cavity mold 4, a neck mold 5 and a core mold 6 is clamped. Upper platen 12 with rotary table 2 in between
A lower platen 15 is provided below and opposite to the lower platen 15 and is moved up and down by the operation of a hydraulic cylinder 14, and a hot runner 17 having an injection nozzle 16 is fixed above the lower platen 15. When the lower platen 15 is raised, the injection nozzle 16 of the hot runner 17 is connected to the injection port 8 of the cavity mold 4 through the through hole 9 of the rotary table 2. On the side of the hot runner 17, there is a plasticizing device 18 that is supported so as to be able to move forward and backward in the horizontal direction.
When the plasticizing device 18 is connected to the injection port 8 of the plasticizing device 18, the plasticizing device 18 is advanced and connected to the hot runner 17, and the molten plastic is injected through the injection nozzle 16 into the parison mold. After the injection of molten plastic into the parison mold is completed, the plasticizing device 18 is retracted, the lower platen 15 is lowered, and the injection nozzle 1
The hot runner 17 descends until the core mold 6 completely comes out of the through hole 9 of the rotary table 2, and at the same time the upper platen 12 is pulled up and separated from the core mold 6. Next, the rotary table 2 is rotated by 120 degrees, and the parison mold containing the injection-molded parison 7 is moved to position B in FIG. 1, and the next parison mold is transported to position A.

As shown in FIG. 3, heat exchange fluid passages 19, 20 and 21 are formed inside the cavity mold 4, neck mold 5 and core mold 6 of each parison mold. A water supply passage 22 and a drainage passage 23 formed in the rotating shaft of
cooling water is circulated through the parison mold according to the molding process to control the temperature of the parison mold, and the parison 7 in the parison mold is kept below the drawing temperature. Cool to Note that in this cooling stage, if hot water is circulated after the cooling water is circulated, the temperature distribution of the parison can be made uniform in a short time. In other words, the outer and inner surfaces of the parison are quickly cooled by the circulation of cooling water within the cavity mold 4 and core mold 6, and cooling of the intermediate portion is delayed, so after cooling to a predetermined temperature, hot water is circulated to slightly increase the temperature of the inner and outer surfaces. By doing so, the whole can be made more uniform. Nonuniform temperature distribution is undesirable because it gives nonuniform stretching effects to the parison. After cooling the parison 7, the rotary table 2 is further rotated by 120 degrees to transport the parison mold containing the cooled parison to position C in FIG.

Above the parison mold at position C, a parison extraction device is arranged as shown in FIG.
The extraction device is composed of a hydraulic cylinder 24 and a pair of openable/closable hooks 25 attached to the lower end of the piston rod of the hydraulic cylinder. When the hydraulic cylinder 24 is operated, the hooks 25 are directed toward the parison mold on the rotary table 2. When the hook descends and the tip of the hook hits the upper edge of the core mold 6, the hook opens against the spring 26 and descends further and passes the lower edge of the core mold 6, and closes under the action of the spring 26. engage with. A pair of guide rods 27 stand upright above the neck mold 5, and these rods 27 pass through the core mold 6 to guide the movement of the core mold 6. A short spring 28 is wound around the top of the neck mold 5, and when the upper platen 12 is pulled up at position A, the core mold 6 is pushed up from the neck mold 5 by the action of the spring 28. A slight gap is created between the two and the tip of the hook 25 into which the tip of the hook 25 can fit. Next, when the hook 25 is pulled up by operating the hydraulic cylinder 24, the core mold 6 is separated from the neck mold 5 and pulled out from the parison 7 whose neck portion is held by the neck mold 5. When reaching the point, the neck mold 5 is pulled up from the cavity mold 4 and the parison 7 is extracted from the cavity mold 4. FIG. 4 shows the state in which the hook 25 has completely pulled up the core mold 6.

The neck mold 5 is divided into two parts and opened and closed by a mechanism shown in detail in FIG. That is, each half of the neck mold 5 has ears 29 protruding from both sides, and the rod 3 is fixed to the frame 30 at both ends and passes through the ears 29.
1 and is movably supported along the rod 3.
1 are pushed in the direction of closing each other by a spring 32' inserted into the opening. The ear 29 of each half of the neck type is connected to the tip of a push rod 32 mounted on a frame 30 by a link consisting of levers 33 and 34, and when the push rod 32 is pushed against a spring 35, The net type 5 is designed to open. As shown in FIG. 4, a neck type opening lever 36 is pivotally attached to the machine frame 1 on the side of the neck type 5 which has been pulled up to the highest position while holding the parison 7.
7, the tip of the lever 36 will be pushed.
By pressing the rear end of the rod 32, the neck mold 5 opens and the parison 7 can be released.

FIG. 6 shows another embodiment of the neck type opening/closing mechanism, in which each half of the neck type 5 is connected to the frame 3.
A spring 4 is fixed to rods 38 and 39 which are slidably mounted on the frame 30', and is fitted into a rod 40 which passes through both halves and is fixed to the frame 30'.
1 and 41 in the direction of mutual closure.
Further, the rods 38 and 39 have racks 42 and 43 formed on their opposing sides, and a gear 44 that meshes with and rotates between the two is mounted on the frame 30'. In such a configuration, when the rod 38 is pressed and one half of the neck mold 5 (the upper half in FIG. 6) is pushed against the spring 41, the gear 44 is pressed.
can be rotated clockwise to push the rod 39 in the opposite direction and push the other half of the neck mold 5 (lower half in FIG. 6) in the opposite direction to open the neck mold 5.

Furthermore, FIG. 4 shows a transfer device which grips the parison 7 before it is released from the neck mold 5 and transfers it to the stretch blow molding section after the neck mold 5 has opened. This transfer device has a shaft 4 supported by a hydraulic cylinder 45 so as to be movable up and down relative to the machine frame 1.
6, a hydraulic cylinder 47 supported by a shaft 46 so as to be swingable in a horizontal plane, and a parison gripper 48 that can be moved forward and backward by operating the hydraulic cylinder 47, and a worm gear 49 fixed to the shaft 46. By rotating the worm 50 that engages with the worm 50, the hydraulic cylinder 47 can swing horizontally about the shaft 46 together with the gripper 48. FIG. 7 shows details of the gripper 48 used when each parison molding die of the injection molding section molds two parisons, and the two grippers 51, 51 are each divided into two parts. One half on the same side is slidably mounted on the frame 52 and fixed to a rod 54 that can be moved back and forth by the operation of a hydraulic cylinder 53, and the other half is also slidably mounted on the frame 52. and is fixed to a rod 56 that can be moved back and forth by operating a hydraulic cylinder 55. In this way, the gripping parts 51, 5
1 opens by operating the hydraulic cylinders 53 and 55 to move the rod 54 to the left in FIG. 7 and the rod 56 to the right, and closes when moved in the opposite direction to grip the parison.

The parison transfer device is constructed as described above, and when the parison 7 held in the neck mold 5 is pulled up to the highest position as shown in FIG. With this operation, the parison 7 is advanced and the gripping portion 51 is closed to grip the parison 7. Next, as described above, the hydraulic cylinder 37 is operated to open the neck mold 5, and the hydraulic cylinder 45 is operated to lower the gripper 48 to completely release the parison 7 from the neck mold 5. Finally, the worm 50 is turned to rotate the gripper 48 around the shaft 46 and transfer it to the stretch blow molding section. After the parison 7 has been transferred to the stretch blow molding section, the neck mold 5 from which the parison has been removed is closed again and lowered together with the core mold 6 by the operation of the hydraulic cylinder 24 to be connected to the cavity mold 4. At this time, the lower end of the piston rod of the hydraulic cylinder 24 presses the top of the core mold 6, opening the hook 25 and removing it from the core mold 6. After the hook 25 is pulled up again, the rotary table 2 is rotated and the assembled parison mold returns to position A in FIG. 1, where clamping and injection are performed again, and the above cycle is repeated.

Next, referring again to FIGS. 1 and 2, the stretch blow molding section will be explained. Reference numeral 57 indicates the machine frame 1 at a higher position than the rotary table 2 of the injection molding section.
The rotary table 57 is rotatably supported by three bearings 58, and the rotary table 57 includes three sets of support molds 59 arranged at equal angular intervals. A ratchet mechanism 6 is attached to the lower end of the rotating shaft of the rotating table 57.
0, and the rotary table 57 is configured to rotate in one direction by the reciprocating movement of the hydraulic cylinder 61, and to stop for a predetermined time every time it rotates 120 degrees.
Similar to the rotary table 2, other drive mechanisms can be used for the rotary table 57. The support mold 59 is divided into two parts like the above-mentioned neck mold 5, and is closed by a spring 62.

The support mold 59 is adapted to receive the parison 7 held and transferred from the injection molding section by the gripper 48 (see FIG. 4) at position D in FIG. 1, and is positioned above the support mold 59 at position D. A support type opening/closing device 63 is attached to the machine frame 1. The support type opening/closing device 63 consists of a hydraulic cylinder 64 and a wedge-shaped head 65 attached to the lower end of its piston rod. Support mold 59 pushed into groove 59a
can be opened. When the gripper 48 of the transfer device (see FIG. 4) that transfers the parison grasps the parison 7 and transfers it to position D, the hydraulic cylinder 45
The top of the parison 7 is inserted into the support mold 59 which is raised by the operation and opened by the opening/closing device 63.
Next, the head 65 of the opening/closing device 63 retreats, the support mold 59 closes, and after gripping the parison 7, the gripper 48
releases the parison 7, moves backward, rotates to the injection molding section, and prepares for transfer of the next parison.

After the support mold 59 has gripped the parison 7, the rotary table 57 is rotated 120 DEG to bring the parison 7 to position E in FIG. As shown in FIG. 8, a parison heating device 66 consisting of a cylindrical heating element is provided at position E, and the heating device 66 can be moved up and down by a hydraulic cylinder 67 attached to the machine frame 1. When the parison 7 is brought to the position E, it is raised to surround the parison 7, and the parison 7, which has been cooled below the drawing temperature, is heated to the drawing temperature and then lowered.

The heated parison 7 is further transferred to a rotating table 57.
is rotated by 120° and transported to position F in FIG. 1 for stretch blow molding. Rotary table 57 at position F
A two-split stretch blow molding mold 68 is disposed on the machine frame 1 below, and this mold 68 is open when the parison 7 is transported to position F, and after being transported to position F, the platen 69 is opened. The mold is clamped by a mold clamping device comprising a hydraulic cylinder 70 and a hydraulic cylinder 70 to surround and seal the parison 7. At position F, a stretch blow molding device is arranged above the rotary table 57. The stretch blow molding apparatus includes a hydraulic cylinder 72 fixed to a bracket 71 erected on the machine frame 1, and a number of blow nozzles corresponding to the number of parisons 7 that are moved up and down by the hydraulic cylinder 72 and held by a support die 59. 73
, a hydraulic cylinder 74 that is moved up and down by a hydraulic cylinder 72 together with the blowing nozzle 73, and an extension rod 75 that coaxially passes through the blowing nozzle 73 and can be moved up and down relative to the blowing nozzle 73 by the hydraulic cylinder 74. ing. The support mold 59 is coaxial with each parison supported by the support mold 59 and has a blowing nozzle 7.
The blow nozzle 7 has a hole 76 into which the blow nozzle 7 is fitted and tightly fitted.
3 has a nozzle opening opening around the stretching rod 75 at the tip. Note that 77 is a lower mold of a stretch blow molding mold, and 78 is a hydraulic cylinder for mounting the lower mold 77.

When the parison stops at position F, the hydraulic cylinder 78 is operated to raise the lower mold 77 until it touches the lower end of the parison, and the hydraulic cylinder 7
2 is operated, the blowing nozzle 73 descends and the supporting mold 5
The nozzle 73 is fitted tightly into the hole 76 of No. 9, and the tip of the nozzle 73 slightly protrudes into the upper part of the parison through the neck portion of the parison. At this time, the stretching rod 75 is in a state of retreating into the blowing nozzle 73. Next, the hydraulic cylinder 74 is operated, and the stretching rod 75 protrudes from the blowing nozzle 73 and descends, hits the bottom of the parison, and further descends together with the lower mold with the parison sandwiched between it and the lower mold 77 to stretch the parison. . Around this time, the stretch blow molding mold 68 is clamped, and compressed air is blown into the parison from the blow nozzle 73 to expand the parison, resulting in a final product with a shape that matches the inner surface shape of the stretch blow molding mold 68. Shape into 79. After molding the final product, the blow nozzle 73 and the stretch rod 75 are moved back to their original positions, the stretch blow molding mold 68 is opened, and the rotary table 57 is rotated 120 degrees to produce the final product held by the support mold 59. 79 is transported to position D. Finally, at this position, the support mold opening/closing device 63 is operated again to open the support mold 59 and drop the finished product into the container 80, ready for receiving the next parison.

In the above embodiment, the parison 7 is received and the final product 79 is discharged at position D of the stretch blow molding section, but due to the layout, it is more convenient to receive the parison and discharge the final product at different positions. There are cases. FIG. 9 shows an example of the embodiment, and the rotary table 57 rotates 90 degrees at a time.
The final product is discharged at a fourth position G. In this case, it is necessary to provide the supported opening/closing device 63 at position G as well as at position D.

FIG. 10 shows a lower platen 15 with a slight change in the structure of the injection molding part in the embodiment shown in FIG. 2.
is fixed on the machine frame 1, the hot runner 17 is held stationary thereon, and the rotary table 2 is supported so as to be movable up and down, and the cavity mold 4 is moved up and down relative to the stationary injection nozzle to separate the injection port 8. An example will be shown in which they are brought into contact with each other. In this embodiment, instead of removing the hydraulic cylinder that moves the lower platen 15, a hydraulic cylinder 81 coaxial with the rotating shaft of the rotary table 2 is provided, and the lower half of the rotating shaft is reduced in diameter to pass through the hydraulic cylinder 81. The rotating shaft is supported by bearings 83 and 84 provided in a casing 82 that is integral with the hollow piston rod. The lower end of the rotating shaft is splined to the ratchet mechanism 10. The rest of the structure is exactly the same as the embodiment shown in FIG. In this manner, in the embodiment shown in FIG. 10, the rotary table 2 can be moved up and down by supplying and discharging pressure oil to the hydraulic cylinder 81.

In conventional injection stretch blow molding equipment, the parison is cooled during the injection molding cycle with the parison mold placed in the injection position, so the injection molding cycle is limited by the time from the start of injection to the completion of cooling. was. In contrast, in the present invention, the main cooling (temperature control of the parison) is performed after the parison mold is moved from the injection position to another position, so injection into the next parison mold is performed even during cooling. The molding cycle can be shortened accordingly. For example, 10 seconds for injection, 20 seconds for cooling
If it takes seconds, the molding cycle with conventional equipment is
However, in the present invention, it is 15 seconds, which can be shortened by 15 seconds. As a result, the present invention can rationally divide the cooling time and injection time to lower the cooling temperature and promote the stretching effect, and it is also possible to easily equalize the temperature of the parison and improve the quality of the product. .

Further, the embodiment of the present invention is characterized in that a support mold is used to transport the parison in the stretch blow molding section. In conventional equipment,
As shown in No. 51-8420, the neck die of the parison molding die was also used to transport the parison in the stretch blow molding section, but this required the preparation of a large number of expensive neck die that required precision machining. There is a problem in that the transfer device becomes large-scale, and furthermore, when the neck mold has a fluid passage for temperature control, it is difficult to transfer the neck mold from the rotary table of the injection molding section to the rotary table of the stretch blow molding section. The support type does not need to exactly match the shape of the parison neck part; it is sufficient to be able to securely hold the parison against the downward pulling force during stretching, so the processing cost is lower than that of the neck type. This can solve the above problems.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of an injection stretch blow molding apparatus according to the present invention. Figure 2 is - of Figure 1.
It is a sectional view along a line. FIG. 3 is a front view showing an overview of the cooling method for the parison mold, with main parts partially cut away. FIG. 4 is a sectional view taken along the line - in FIG. 1, showing details of the parison extraction and transfer device. FIG. 5 is an enlarged plan view of one embodiment of the neck-type opening/closing mechanism. FIG. 6 is an enlarged plan view of another embodiment of the neck-type opening/closing mechanism. FIG. 7 is an enlarged plan view of the gripper in the transfer device. FIG. 8 is a partial front view of the rotary table of the stretch blow molding section showing the parison heating device in section. Figure 9 shows how the rotary table moves four stages into one
FIG. 2 is a plan view of a stretch blow molding section that differs from that of FIG. 1 in that it is cycled; FIG. 10 is a cross-sectional view of an injection molding section that differs from the embodiment shown in FIG. 2 in that a rotary table is supported so as to be movable up and down. 2... Injection molding department rotary table, 4... Cavity mold, 5... Net mold, 6... Core mold, 7...
Parison, 8...Inlet, 9...Through hole, 12,
13... Mold clamping device, 16... Injection nozzle, 19
~23...Cooling device, 24-26...Extraction device, 66...Heating device, 68...Mold for stretch blow molding, 75...Stretching device, 93...Blow molding nozzle.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A device for clamping a parison mold for molding at least one preformed parison, consisting of a cavity mold, a neck mold, and a core mold;
a device for injecting a raw material into the clamped parison mold; a device for cooling the parison injection-molded in the parison mold to a temperature below the stretching temperature; and a device for parison molding the cooled parison. a device for extracting the parison from the mold, a device for heating the extracted parison to a stretching temperature, a device for mounting the heated parison in the stretch blow mold, and a device for placing the parison in the stretch blow mold. It has a device for stretch blow molding the attached parison, a device for ejecting the final molded product from the stretch blow mold, and a control mechanism for sequentially and repeatedly operating each of the devices in the above order. , each of the above-mentioned apparatuses is divided into an injection molding section and a stretch blow molding section, and the preformed parison injection molded in the injection molding section is extracted from the parison molding mold and transferred to the stretch blow molding section. In the injection stretch blow molding apparatus for plastic products, the injection molding section has at least two parts.
a device for carrying said parison molds and intermittently transporting said molds so that each set of said molds stops sequentially at at least two predetermined positions; The mold clamping and injection device operates when the mold stops at the second position, and the cooling device operates when the mold stops at the second position. It has a transfer device for transferring the parison which is arranged so as to straddle the parison and can move up and down and turn, and the transfer device grips the parison held in the neck shape by a gripper, and then transfers the parison to the neck shape. is opened by a device that opens the neck mold, grasps only the parison released from the neck mold, turns it toward the stretch blow molding section, and transfers it to a support device provided in the stretch blow molding section that can be opened and closed. An injection stretch blow molding apparatus characterized in that the injection stretch blow molding apparatus is configured to hold the (2) The utility model characterized in that the cooling device comprises a fluid passage around each of the parison molds, and cold water is supplied to the passage when each parison mold is in the second position. A molding device according to registered claim 1. (3) The molding apparatus according to claim 2, wherein hot water is supplied to the passageway after cold water is supplied to the passage. (4) The transfer device consists of a rotary table that supports three sets of the parison molds at 120° intervals and rotates intermittently at 120° intervals, and each parison mold on the rotary table is in a first position, the mold clamping and injection device is activated;
the cooling device is activated when in the second position;
2. The molding device according to claim 1, wherein the parison extraction device operates when in the third position. (5) The rotary table has through holes arranged at angular intervals of 120 degrees, and each cavity mold of the parison mold is rotated so that the raw material injection port provided at the bottom communicates with each of the through holes. 5. The molding apparatus according to claim 4, which is fixed on a table and has an injection nozzle connected to the cavity-type injection port through the through hole. (6) The rotary table is supported so as to be movable up and down in the direction of its rotational axis, and the rotary table moves up and down with respect to an injection nozzle which is stationary and fixed, so that the cavity-type injection port can be attached and detached. A molding device according to claim 5 of the patent registration claim. (7) a second rotary table that is adjacent to the rotary table and carries at least three parison support devices that removably hold parisons at equal angular intervals and rotates intermittently by an angle equal to the angular interval; When each parison support device on the second rotary table is in a first position, the support device supports the parison extracted from the parison mold, and when in the second position, the heating device is activated. 5. The molding apparatus according to claim 4, wherein the stretch blow molding apparatus operates when the stretch blow molding apparatus is in the third position. (8) Utility model registration claim 7, characterized in that when the second rotary table makes one revolution and each parison support device returns to the first position, the support device releases and discharges the final product. molding equipment. (9) The second rotary table is configured to carry four parison support devices and rotate intermittently by 90 degrees, and each parison support device releases and discharges the final product at a fourth position. A molding apparatus according to claim 7 of the utility model registration claim, characterized in that: