JPH08103948A - Preform cooler - Google Patents

Abstract

PURPOSE: To provide a preform cooler which has a simple structure and high cooling efficiency as a cooler for cooling a preform by another cooler after the preform is removed from a mold. CONSTITUTION: A plurality of cylindrical protrusions 146 which can receive all preforms P of the number corresponding to one shot of a mold is formed by covering it with the performs P at a preform carrier 14 which receives the preforms P removed from the mold for injection molding at a supply area. A plurality of air diffusing holes 147 for diffusing cooling air from a blower 16 are formed at the protrusions 146. The preforms P are also cooled by the cooling air from a blower 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a preform cooling device for cooling a bottomed cylindrical preform used for uniaxial stretch blow molding or biaxial stretch blow molding after injection molding.

[0002]

2. Description of the Related Art In a manufacturing process of a polyethylene terephthalate biaxially stretch blow molding bottle or the like, first, a bottomed cylindrical preform is manufactured by injection molding, and then the preform is biaxially stretch blow molding. . Here, in the injection molding process for manufacturing the preform, the preform is taken out from the mold after being cooled and solidified in the mold.

[0003]

However, in the method of completely cooling the preform in the mold like the conventional injection molding method, the cooling is performed in the molding cycle of injection-cooling-mold opening-removal. When the time required for
As a result, the time required for the entire molding cycle is extended, and the productivity is significantly reduced.

In view of the above problems, the object of the present invention is to
Another object of the present invention is to provide a preform cooling device having a simple structure and high cooling efficiency as a cooling device for cooling the preform after taking out the preform from the mold.

[0005]

In a preform cooling device according to the present invention, a cylindrical projection for receiving a preform by being covered with a bottomed cylindrical preform taken out from an injection molding die is provided. A preform carrier, and a carrier driving unit that drives the preform carrier to move the cylindrical projection along a preform carrier path from the preform carry-in area to the carry-out area to the carry-in area again. The preform inner wall side cooling air blowing means for sending cooling air from the lower side through the air flow passage is provided in the cylindrical protrusion that moves along the reform conveyance path. The same number of cylindrical projections as the number of cavities of
It is characterized in that a plurality of air blowing holes for blowing the cooling air fed into the inside of the preform are formed.

In the present invention, when the preform transport path is formed in the shape of a rectangular loop in which a plurality of preform transport tools can be arranged horizontally, the transport tool driving means is arranged with an empty portion in the preform transport path. Among the plurality of preform transfer tools, the preform transfer tools located in each square part of the preform transfer path are fed and moved in the direction in which the empty part is filled, and the preform transfer tool is intermittently shifted around a certain direction. It uses four linear feed mechanisms.

In the present invention, when the preform carrier is provided with a turntable in which the cylindrical projections are formed in respective regions deviating from each other in a predetermined angle range, the carrier driving means is configured to rotate. A rotary feed mechanism that shifts the angular position of the cylindrical projection by intermittently rotating the board around a certain direction is used.

According to the present invention, the feeding position of the cooling air in the air flow passage with respect to the cylindrical protrusion is set to be an area of the preform transport path which is away from the carry-out area, so that the cylindrical protrusion not covered with the preform. It is preferable to suppress the leakage of the cooling air from the.

Further, according to the present invention, a cover is provided for covering a region of the upper position of the preform transport path which avoids the upper position of the carry-in area and the carry-out area, and for cooling the preform from the outer surface side in this cover. It is preferable to cool the preform also from the outer wall side by providing a preform outer wall side cooling blower means for supplying cooling air.

[0010]

In the preform cooling device according to the present invention, the preform taken out from the mold for injection molding is placed on the cylindrical projection of the preform carrier, and the preform is received. Is driven by the transport tool driving means to move the cylindrical projection from the carry-in area of the preform to the carry-in area and then to the carry-in area again. Here, a plurality of air blowing holes are formed in the cylindrical projection, and since cooling air is blown out from the air blowing holes in the preform, the preform is cooled from the inner wall side. . Therefore, even a molded product such as a preform that is difficult to cool because it has a bottomed tubular shape can be cooled efficiently. Also, because it is a structure that receives the preform over the cylindrical projection,
No complicated holding mechanism is required. Further, since the preform transporting tool is formed with the cylindrical projections of the number capable of receiving all the preforms corresponding to one shot of the mold, the processing capability is high.

[0011]

Embodiments of the present invention will now be described with reference to the drawings.

[Embodiment 1] FIG. 1 is a schematic plan view of a preform cooling device of this embodiment, and FIG. 2 is a longitudinal sectional view thereof.
3A is a vertical cross-sectional view taken along the line ii ′ of FIG.
(B) is explanatory drawing of the cylindrical protrusion for hold | maintaining a preform.

In FIGS. 1 and 2, a preform cooling device 10 of this example is arranged at a lateral position of an injection molding machine 1. The preform cooling device 10 includes a robot for transferring a preform from a mold 2 ( The preform P for one shot taken out by the arrow A.) is put in at one time.

In the preform cooling device 10, the machine base 11
A guide 12 that extends horizontally is formed on the upper surface side of the preform conveyance path 13. That is, in transporting the preform P in the preform cooling device 10, in this example, a metal, resin, or wooden rectangular plate-shaped preform transport tool 14 is used. 3 so that 14 slides horizontally without falling off.
As shown in (a), a guide groove 122 is formed on the inner side surface of the guide 12 into which both end portions of the preform carrier 14 are fitted.

Referring again to FIGS. 1 and 2, in the present example, the position adjacent to the injection molding machine 1 in the preform transport path 13 is the preform P carry-in area IN, from which the arrows X1, Y1, The area that has returned to the position adjacent to the carry-in area IN along the circle X2 is the carry-out area OUT of the preform P. Delivery area O
A well-known preform take-out robot (indicated by an arrow B) is arranged at a lateral position of the UT.

The preform conveying path 13 is formed by a plurality of preform conveying tools 14 in a rectangular loop shape capable of being arranged in two rows. In FIG.
12 of the first to fourth square portions 131 to 134 are arranged so that the first and third square portions 131 and 133 become empty portions Q1 and Q2 of the preform conveying tool 14. 14 the preform conveyance path 13
It is shown in the state of being arranged along with. The first to fourth square portions 131 to 134 of the preform transport path 13 have first to fourth pusher mechanisms 151 to 151, respectively.
154 (transport tool driving means, linear feed mechanism) is arranged. The first pusher mechanism 151 is arranged so as to send out the preform transport tool 14 in the first square portion 131 in the arrow X1 direction. Further, the second pusher mechanism 152 directs the preform transfer tool 14 in the second square portion 132 in the direction of the arrow Y1, and the third pusher mechanism 153 controls the preform transfer tool in the third square portion 133. The fourth pusher mechanism 154 is configured to feed the preform transport tool 14 in the fourth square portion 134 in the arrow Y2 direction with the tool 14 directed in the arrow X2 direction. That is, the first to fourth pusher mechanisms 151 to 154 move the preform transport tools 14 located in the first to fourth square portions 131 to 134 of the preform transport path 13 in the direction in which the empty portions Q1 and Q2 are filled. By feeding and moving, each preform carrier 14 is intermittently shifted around a certain direction (counterclockwise toward FIG. 1).

The preform carrier 14 carries the preform P while supporting it in the following manner. As shown in FIG. 3A, the preform carrier 14
Then, the plate portion 145 is slid in the guide groove 122 of the guide 12 and eight cylindrical protrusions 146 made of metal or heat-resistant resin that project upward from the plate portion 145. , These cylindrical projections 146
By covering each of the preforms P with the preform P, the preform conveying tool 14 can receive the preform P and convey it in the posture as it is. In this example, four cavities of the mold 2 are formed in two rows, and eight preforms P formed by one shot are collectively molded.
Since it is taken out from the mold and is carried into the preform cooling device 10, one preform conveying tool 14 is provided with two cylindrical projections 146 in two rows of four at positions corresponding to the arrangement of the cavities of the mold 2. By forming it, it is possible to collectively receive a number of preforms P corresponding to one shot of the die 12.

Blowers 16 are provided on the left and right sides of the machine base 11.
Two (air blowing means for cooling the inner wall of the preform) are arranged in groups of two. A lower surface cover 17 is stretched at a lower position of the preform transport path 13 so as to cover the lower surface thereof, and the blower 16 pumps cooling air toward between the lower surface cover 17 and the preform transport path 13. It is like this. Here, the preform transport path 13 is closed by the preform transport tool 14 when the preform transport tool 14 passes therethrough, so that air circulation is performed between the bottom surface 141 of the preform transport tool 14 and the lower surface cover 17. Road 161
Is in a state of being partitioned. In addition, carry-out area OUT
In the range from the return to the carry-in area IN, even if the cylindrical projection 146 passing therethrough blows out the cooling air, it is useless. Therefore, if the structure in which the cooling air is not blown out from the cylindrical protrusion 146 in the range where the partition area defined by the lower surface cover 17 is limited to return from the carry-out area OUT to the carry-in area IN, unnecessary cooling air is blown out. Disappears. In this case, the amount of cooling air supplied to the inside of the preform P can be sufficiently secured, so that the cooling capacity is improved.

In this example, in the preform carrier 14, the cylindrical projection 146 is hollow, and a large number of air blowing holes 147 are formed on the side surface thereof. Also, FIG.
As shown in (b), on the tip end surface of the cylindrical projection 146, an air blowing hole 148 having grooves radially extending from the center thereof.
Is open. Therefore, the cooling air that has been pressure-fed from the blower 16 enters the inside 149 of the cylindrical projection 146 through the air flow passage 161 as shown by the arrow C1, and as shown by the arrow C2, the air blowing hole 147, 1
It is supposed to be blown out from 48. The air blown out between the cylindrical protrusion 146 and the preform P escapes through a gap 145 formed between the lower end of the preform P and the preform carrier 14. Therefore, even if the length of the preform P changes,
It is sufficient to cover the cylindrical projection 146 with the preform P as it is.

Further, in this example, FIG. 2 and FIG.
As shown in FIG. 6, the upper surface side of the preform transport path 13 except the carry-in area IN and the carry-out area OUT is covered with the top cover 18 as a cooling area COL. A tip 181 of the upper surface cover 18 is bent downward, and the cooling chamber 1 is provided on the upper surface of the preform transfer path 13.
9 is in the state of being partitioned. Three blowers 20 (a blower means for cooling the preform outer wall side) are installed on the upper surface of the upper surface cover 18, and these blowers 20 are cooled toward the inside of the cooling chamber 19 as shown by an arrow D. It is designed to send air. The cooling air sent to the cooling chamber 19 is adapted to come out from the lower end side of the tip edge 181.

The operation of the preform cooling device 10 thus constructed will be described with reference to FIGS.

From the state shown in FIG. 1, first, the injection molding machine 1
The eight preforms P taken out by the preform transfer robot (shown by the arrow A) from the mold 2 are collectively carried into the carry-in area IN of the preform cooling device 10, where the preforms P are The cylindrical projection 146 of the preform carrier 14 is covered. Then, on the injection molding machine 1 side, the next cycle of injection molding is performed.

In this state, in the preform cooling device 10, the first and third square portions 131 and 133 of the preform transport path 13 are empty portions Q1 and Q2 of the preform transport tool 14. Here, in each of the first to fourth pusher mechanisms 151 to 154, the rod is in a retracted state.

From this state, when the second and fourth pusher mechanisms 152, 154 are actuated to extend the rod,
Preform carrier 1 located in the second square portion 132
4 is the third square portion 13 so as to fill the empty portion Q1.
The preform transport tool 14 located in the fourth square portion 134 is also shifted to the first square portion 131 so as to fill the empty portion Q2. As a result, the second and fourth square portions 132 and 134 become empty portions of the preform carrier 14. Then, the first and third pusher mechanisms 151 and 153 are operated, the preform transport tool 14 located in the third square portion 133 is displaced in the direction of arrow X2, and is pushed to the fourth square portion 134. The reform carrier 14 moves. Similarly, the first square portion 13
The preform carrier 14 located at 1 shifts in the direction of the arrow X1, and the preform carrier 14 moves to the second square portion 132.

Then, when the injection molding inside the mold 2 is completed, the preform P is carried into the carry-in area IN from the mold 2 again, and the above operation is repeated. As a result, the preform transport tools 14 are displaced one by one in the directions of the arrows X1, Y1, X2, and Y2, and the preform P is transported from the carry-in area IN to the carry-out area OUT.

During this time, the preform P is cooled. That is, as shown in FIG. 3A, the blower 1 is provided below the preform transport path 13.
Since the cooling air pressure-fed from 6 enters the inside of the cylindrical projection 146 of the preform transporting tool 14 through the air flow passage 161, and is blown out from the air blowing holes 147 and 148, the preform P is formed on the inner wall side. Cooled from. On the other hand, on the upper side of the preform transport path 13, the cooling air pressure-fed from the blower 16 is blown out into the cooling chamber 19, so that the preform P is cooled from the outer wall side. Here, since the supply area of the cooling air is limited by the upper surface cover 18 to increase the flow velocity of the cooling air supplied to the outer wall of the preform P, the cooling capacity is high.

In this way, the preform P is sufficiently cooled while being placed on the preform carrier 14, and rotates in the direction of arrows X1, Y1, X2 together with the preform carrier 14 to reach the carry-out area OUT. To do. Therefore,
Eight preforms P are collectively ejected by the preform take-out robot as shown by an arrow B. Preform carrier 14 after the preform P is removed
Returns to the carry-in area IN by rotating again in the directions of arrows Y2 and X1.

As described above, according to the preform cooling device 10 of this embodiment, the preform P is sufficiently cooled from both the inner wall side and the outer wall side, so that the preform P is completely cooled inside the mold 2. -No need to solidify. Therefore,
Among the injection-cooling-mold opening-unloading cycles in injection molding, the cooling time can be remarkably shortened, so that the time required for the entire cycle can be shortened. Therefore, the productivity of the preform P is improved. Moreover, since the preform P is covered on the cylindrical projection 146 and the cooling air is blown out inside thereof,
The inner wall of the preform P, which is difficult to cool because it has a bottomed cylindrical shape, is also efficiently cooled. In addition, the dimensional accuracy of the preform P is high. Further, since the preform P is received by covering the cylindrical projection 146, a complicated holding mechanism for the preform P is unnecessary.

Further, since the eight preforms P molded in one shot are collectively conveyed by one preform conveying tool 14, the processing ability is high and the feeding operation is performed by the injection molding machine 1. The control of the first to fourth pusher mechanisms 151 to 154 is simple, for example, it may be performed according to the operation. Further, since the pusher mechanism is used as the drive mechanism of the preform transport tool 14 and the chain and the sprocket do not form an endless track, positioning of the preform transport tool 14 is easy and reliable.

[Embodiment 2] FIG. 4 is a schematic plan view of a preform cooling apparatus of this embodiment, and FIG. 5 is a vertical sectional view thereof.
In addition, in this example, the configuration of the injection molding machine, the mold, and the like is similar to that of the first embodiment, and therefore, corresponding parts are denoted by the same reference numerals and the description thereof is omitted.

In FIG. 4 and FIG. 5, the preform cooling device 30 of this example is also arranged at the lateral position of the injection molding machine 1, and eight preforms P molded inside the mold 2 for injection molding. Are collectively carried by the preform transfer robot 50. Here, the preform transfer robot 50 includes a preform chuck 51 that pulls out the eight preforms P collectively from the mold 2 and holds them downward, and a lifting mechanism 5 for the preform chuck 51.
2 and horizontal movement mechanism 5 of preform chuck 51
3 is provided.

In the preform cooling device 30, the machine base 31
A rotary disk 32 (preform carrier) is formed on the upper surface side of the rotary table 32, and the upper surface of the rotary disk 32 is a preform transport path 33. That is, in the central portion of the turntable 32,
A drive motor M fixed to the machine base 31 (transport tool driving means,
The output rotary shaft M1 of the rotary feed mechanism) is connected, and the rotary disc 32 also intermittently rotates in the angular range of 45 ° by rotating the output rotary shaft M1 in the angular range of 45 °. On the upper surface side of such a turntable 32, eight preform mounting areas 34 for receiving the preform P to be carried in are formed at an angle interval of 45 °, and any of the eight preform mounting areas 34 is formed. Also, the eight cylindrical protrusions 346 extend upward in two rows.
As shown in FIG. 6, these cylindrical projections 346 also carry the preform P while covering it. Here, each formation position of each cylindrical projection 346 corresponds to the arrangement of the cavities of the mold 2. Therefore, the eight preforms P are taken out from the mold 2 and the cylindrical projections 346 are taken as they are.
It is possible to cover it. Here, the cylindrical protrusion 346
Are both bolted to the turntable 32 through the block 348, and the inside 34
9 is in a state of communicating with the through hole 362 formed in the turntable 32.

4 and 5, the position near the injection molding machine 1 in the preform transport path 33 is the loading area IN, and from there, an angle of 45 ° is formed in the right direction toward FIG. The area is the carry-out area OUT. A preform take-out robot 60 and a bucket 61 for storing the pre-form P taken out by the robot are arranged at a position on the outer peripheral side of the transfer area OUT. Here, the preform take-out robot 60 includes a preform chuck 61 that collectively extracts and holds eight preforms P from the cylindrical protrusion 346, a lifting mechanism 62 for the preform chuck 61, and the preform chuck 6.
The horizontal movement mechanism 63 of No. 1 is provided.

In the preform transport path 33, the area excluding the carry-out area OUT is a cooling area COL, and in this cooling area COL, the space below the turntable 32 is attached to the machine base 31 by a cover 376. And the motor cover 372 define an air flow passage 361. Cooling air is pressure-fed to the inside of the air flow passage 361 from a blower 36 (blower means for cooling the inner wall of the preform) fixed to the outside of the machine base 31.

Here, as shown in FIG. 7 in a cross section taken along the line ii-ii 'in FIG. 5, the cover 376 is provided in the carry-out area OU.
The portion corresponding to T is a recess 377 so that the cooling air does not reach the position below the carry-out area OUT.

As shown in FIG. 8, the cooling area CO
In the OL, of the upper surface side of the preform transport path 33,
Areas other than the carry-in area IN and the carry-out area OUT are covered with the upper surface cover 38. The tip 381 of the upper surface cover 38 is bent downward, and the preform transport path 33
A cooling chamber 39 is partitioned and formed on the upper surface of the.
A blower 40 (air blower for cooling the preform outer wall side) is installed on the side surface of the upper cover 38.
As indicated by the arrow D, 0 sends the cooling air toward the inside of the cooling chamber 39. The cooling chamber 39
The cooling air sent to the front end 381 of the top cover 38.
It dives underneath and goes outside.

The operation of the preform cooling device 30 configured as described above will be described with reference to FIGS. 4 and 8.

In FIG. 4, an injection molding machine 1 and a mold 2 are provided.
The eight preforms P taken out by the preform transfer robot 50 from the above are collectively carried into the carry-in area IN of the preform cooling device 30, and the preforms P are covered with the cylindrical projections 346 there. Then, on the injection molding machine 1 side, the next cycle of injection molding is performed. At this time, the cylindrical protrusion 346 in the carry-out area OUT
Then, the preform P is removed by the preform take-out robot 60 and is discharged into the bucket 61.

From this state, the drive motor M turns the rotary disk 3
2. Rotate 2 in the direction of arrow E in an angle range of 45 °. As a result, the preform P moves in the direction of the arrow E by an angle of 45 °. Further, from the carry-out area OUT, the cylindrical protrusion 346 without the preform P moves to the carry-in area IN. After that, when the injection molding inside the mold 2 is completed, the preform P is carried into the carry-in area IN from the mold 2 again, and the above operation is repeated. As a result, the preform P is conveyed from the carry-in area IN to the carry-out area OUT.

During this period, the preform P is cooled in the cooling area COOL. That is, as shown in FIG. 8, on the lower side of the preform transport path 33,
The cooling air pressure-fed from the blower 36 is the air flow passage 3
Since it enters the inside 349 of the cylindrical projection 346 through 61 and the through hole 362 and is blown out from the air blowing hole 347, the preform P is cooled from the inner wall side.
However, since the air flow passage 361 is not formed at a position corresponding to the carry-out area OUT, the cylindrical protrusion 346 passing therethrough does not blow out the cooling air. Unloading area OU
The preform P conveyed to the T is already cooled, and the cylindrical projection 3 from which the preform P has been removed
This is because blowing cooling air from 46 is useless. Therefore, in this example, since unnecessary cooling air is not blown out, the amount of cooling air supplied to the inside of the preform P can be sufficiently secured, so that the cooling capacity is high. on the other hand,
The blower 40 is provided above the preform transport path 33.
The cooling air that has been pressure-fed from is being pressure-fed into the cooling chamber 39, and the preform P is cooled from the outer wall side. Also in this case, since the cooling air supply area is limited by the upper surface cover 38 to increase the flow velocity of the cooling air supplied to the outer wall of the preform P, the cooling capacity is high.

In this way, the preform P is sufficiently cooled while passing through the cooling area COOL while being placed on the turntable 32, and is discharged from the carry-out area OUT.

As described above, according to the preform cooling device 30 of the present example, it is not necessary to completely cool and solidify the preform P inside the mold 2, so that the injection-cooling-mold opening-injection molding is performed. During the take-out cycle, the cooling time can be remarkably shortened. Therefore, the same effects as those of the first embodiment can be obtained such that the productivity of the preform P is improved. Further, in the preform cooling device 30 of the present example, since the eight preforms P molded in one shot are collectively received, the processing capability is high. Moreover, since the rotary feeding operation of the rotary disk 32 may be intermittently performed in accordance with the molding operation of the injection molding machine 1, the positioning of the cylindrical projection 346 and the like are easy and reliable.

[0043]

As described above, in the preform cooling device according to the present invention, the preform transporter receives all the preforms corresponding to one shot of the mold by covering the preforms with the preforms. A plurality of possible cylindrical protrusions are formed, and these cylindrical protrusions are characterized in that air blowout holes for blowing cooling air from the blower means are formed. Therefore, according to the present invention, since it is not necessary to completely cool and solidify the preform inside the mold, the time required for the molding cycle can be shortened, and the productivity of the preform is improved. Further, by blowing the cooling air from the air blowing hole of the cylindrical protrusion, the preform can be cooled from the inner wall side,
Even a molded product such as a preform can be cooled efficiently. Further, since the preform is received by covering the tubular projection, a complicated holding mechanism is unnecessary. Furthermore, since the preform carrier is formed with the cylindrical projections having the number of cavities or more, the processing capability is high.

In the present invention, four linear feed mechanisms for intermittently shifting the preform conveying tool along the rectangular preform conveying path, or the rotary disk having the cylindrical projections are intermittently rotated. When the conveying tool driving means is constructed by using the rotary feed mechanism, it is not necessary to form an endless track with a chain, a sprocket, etc., so that the preform conveying tool can be positioned easily and surely. .

[Brief description of drawings]

FIG. 1 is a schematic plan view of a preform cooling device according to a first embodiment of the present invention.

FIG. 2 is a schematic vertical sectional view of the preform cooling device shown in FIG.

3A is a schematic vertical sectional view taken along line ii 'of FIG. 1, and FIG. 3B is an explanatory view of a cylindrical protrusion for holding a preform.

FIG. 4 is a schematic plan view of a preform cooling device according to a second embodiment of the present invention.

5 is a schematic vertical cross-sectional view of the preform cooling device shown in FIG.

FIG. 6 is a vertical cross-sectional view of a turntable of the preform cooling device shown in FIG. 4 and a cylindrical protrusion formed therein.

FIG. 7 is a schematic cross-sectional view taken along the line ii-ii ′ of FIG.

FIG. 8 is a schematic vertical sectional view taken along the line iii-iii ′ of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Injection molding machine 2 ... Mold 10, 30 ... Preform cooling device 13, 33 ... Preform conveyance path of preform 14 ... Preform conveyance tool 16, 36 ... Blower (air blower for cooling preform inner wall) 17, 38 ... Lower surface cover 18 ... Top cover 19, 39 ... Cooling chamber 20, 40 ... Blower (air blower for cooling preform outer wall) 32 ... Rotating disk (preform conveying tool) 131, 132, 133, 134 ... Square portion of preform conveying path 146, 346 ... Cylindrical protrusion 147, 148, 347 ... Air blowing hole 151 , 152, 153, 154 ... Pusher mechanism (linear feed mechanism) IN ... Carry-in area OUT ... Carry-out area COOL ... Cooling area M ... Drive mode (Rotary feed mechanism) feeding direction P ... preform Q1, Q2 free portion of ... preform conveying device X1, Y1, X2, Y2 ··· pusher mechanism

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location // B29L 22:00

Claims (5)

[Claims] 1. A preform transporting tool having a cylindrical projection that receives a preform by being covered with a bottomed cylindrical preform taken out from a mold for injection molding,
A transport tool driving unit that drives the preform transport tool to move the cylindrical protrusion along a preform transport path from the preform loading area to the unloading area and back to the loading area, and the preform transport path. And a preform inner wall side cooling blower means for sending cooling air from the lower side through the air flow passage into the cylindrical protrusion that moves along, the preform carrier is a mold. The preform cooling device is provided with the same number of the cylindrical protrusions as the number of cavities, and the cylindrical protrusions are provided with a plurality of air blowing holes for blowing out the cooling air fed thereinto in the preform. . 2. The preform transport path according to claim 1, wherein the preform transport path is configured in a rectangular loop shape capable of horizontally arranging a plurality of the preform transport tools, and the transport tool driving means is provided in the preform transport path. Among the plurality of preform transporting tools arranged with a vacant portion, the preform transporting tool located in each square portion of the preform transporting path is fed and moved in a direction in which the vacant portion is filled, to thereby perform the preform transporting tool. A preform cooling device having four linear feeding mechanisms for intermittently shifting a predetermined direction around a predetermined direction. 3. The preform carrier according to claim 1, further comprising a turntable in which the tubular projections are formed in respective regions deviated from each other by a predetermined angle range, and the carrier tool driving means comprises:
A preform cooling device comprising: a rotary feed mechanism that intermittently rotates the turntable around a certain direction to shift the angular position of the cylindrical projection. 4. The feeding position of the cooling air in the air flow passage with respect to the cylindrical projection in any one of claims 1 to 3, wherein:
A preform cooling device, characterized in that the preform cooling device is in an area avoiding the carry-out area. 5. The cover according to any one of claims 1 to 4, further comprising: a cover that covers a region of the upper position of the preform transport path that avoids the upper positions of the carry-in area and the carry-out area. A preform cooling device, comprising: a preform outer wall side cooling blower means for supplying cooling air for cooling the preform from the outer surface side in the cover.