JP3612395B2 - Container forming apparatus and container forming method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a container forming apparatus and a container forming method, and more particularly, to a container forming apparatus and a container forming method for forming a container by carrying out blow molding after the preform is conveyed by a conveying member that holds the preform and heated. About.
[0002]
[Background Art and Problems to be Solved by the Invention]
As a method for blow-molding a container from a cylindrical preform (parison), there are a method called a cold parison method or a two-stage method, and a method called a hot parison method or a one-stage method. In the cold parison method (two-stage method), a normal temperature preform (parison) is heated to a temperature at which blow molding can be performed, that is, a so-called blow molding suitable temperature or higher.
In addition, in the hot parison method (one stage method), since the preform (parison) retains the heat during injection molding, it does not need to be heated as long as the cold parison method (two stage method). However, it is necessary to heat it above the blow molding optimum temperature.
[0003]
In any of these methods, the temperature raising and heating until reaching the appropriate temperature for blow molding is to uniformly heat the preform in the circumferential direction.
[0004]
On the other hand, in the case of blow molding a specially shaped container such as a flat container, the preform that has just been heated and heated has a portion that is largely stretched and a portion that is not stretched so much. Therefore, a thin portion and a thick portion are generated.
[0005]
In order to avoid such a state, it is necessary to provide a temperature distribution such that the temperature of the part of the preform that is largely stretched is lower than that of the other part. In order to provide such a temperature distribution, local temperature control must be performed on the preform.
[0006]
If a temperature control device that performs local temperature control on such a preform is added, the molding device becomes large in size, and space cannot be saved, and the cost increases.
[0007]
In addition, in order to obtain the desired molding quality stably by blow molding the preform that has been heated and heated, the purpose is to reduce the temperature difference between the inside and outside of the preform, or to obtain a balance of the preform temperature. In some cases, a standby position is arranged.
[0008]
An object of the present invention is to provide a container molding apparatus and a container molding method that can perform local temperature control on a preform without increasing the size of the apparatus, and can save space and reduce costs. There is.
[0009]
Another object of the present invention is to provide a container forming apparatus and a container forming method capable of performing accurate local temperature control with a simple configuration.
[0010]
[Means for Solving the Problems]
In order to achieve the object, the invention of claim 1 includes a heating part that heats a preform made of synthetic resin to a temperature appropriate for blow molding, a blow molding part that blow-molds the preform heated by the heating part, A standby unit that waits for the preform heated between the heating unit and the blow molding unit, and a carrier member that holds the preform from the heating unit through the standby unit to the blow molding unit for conveyance A container forming device having a conveying means for
The standby unit is attached to the preform conveyed from the heating unit. Local temperature control Temperature control means for performing the above, positioning means for positioning the transport member, and advance / retreat drive means for driving the temperature control means and the positioning means individually or integrally with respect to the preform and the transport member,
The positioning means contacts the transport member and positions the transport member.
[0011]
According to the present invention, the temperature adjusting means is provided in the standby part disposed between the heating part and the blow molding part, and the preform is relaxed during the temperature relaxation of the preform in the standby part. Local temperature control By making use of the empty space in the standby section, it is possible to control the temperature of the preform without providing a separate temperature control section, and to save space without increasing the size of the container molding device. In addition, the cost can be reduced.
[0012]
In addition, by having positioning means for positioning the conveying member that conveys the preform, it is possible to adjust the temperature in a state where the conveying member is positioned, perform accurate temperature adjustment, and the temperature adjusting means and the positioning means include Simplification of the apparatus can be achieved by being driven forward and backward by the forward and backward driving means having a simple operation.
[0013]
The invention of claim 2 is the invention according to claim 1,
The temperature control means is a cooling means for cooling the preform.
[0014]
The present invention is effective when the preform is locally cooled.
[0015]
This is particularly effective when a specially shaped container such as a flat container is formed.
[0016]
The invention of claim 3 is the invention according to claim 1,
The temperature control means is a heating means for heating the preform.
[0017]
The present invention is effective when the preform is locally heated.
[0018]
It is particularly effective when the body portion of the preform corresponding to the shoulder portion of the container is heated to make it easy to stretch, or when heating a thick portion that is insufficient by heating at the heating portion. .
[0019]
The invention of claim 4 is the invention according to claim 1,
The temperature control means is in contact with the temperature control surface of the preform. Local temperature control It is the temperature control member to be characterized.
[0020]
According to the present invention, the temperature of the preform can be adjusted according to the purpose by using a contact-type temperature adjusting member such as a cooling block or a heating block. In particular, the contact type is effective when it is desired to clarify the temperature control area.
[0021]
The invention of claim 5 is the invention according to claim 1,
The temperature control means is not in contact with the temperature control surface of the preform. Local temperature control It is the temperature control member to be characterized.
[0022]
According to the present invention, for example, the temperature of a preform can be adjusted according to the purpose by a non-contact type temperature adjustment member using cooling air, heating air, a radiant heat source, or the like. In particular, the non-contact type is advantageous in that the temperature can be controlled without applying mechanical pressure to the preform, and that the appearance of the product is good because the boundary between the temperature control part and the non-temperature control part is not clear. is there.
[0023]
The invention of claim 6 is directed to claim 1,
The conveying member forms a circulating conveying path that is circulated and conveyed by the conveying means;
The temperature adjusting means, the positioning means, and the advance / retreat driving means are arranged outside the circulation conveyance path.
[0024]
According to the present invention, there are relatively few devices on the outside of the circulation conveyance path, and the empty space is effectively used by installing the temperature control means, the positioning means, the advance / retreat driving means, etc. using this empty space. Can be easily performed.
[0025]
The invention of claim 7 is the invention according to claim 1,
In the preform, the surface located in the transport direction of the preform is a temperature control surface,
The temperature adjusting means is configured to be capable of moving back and forth in a direction intersecting with the conveying direction of the preform.
[0026]
According to the present invention, the temperature can be controlled simply by moving the temperature control means straight forward and backward with respect to the temperature control surface, and the apparatus can be simplified.
[0027]
The invention of claim 8 is the invention according to claim 1,
The standby section has a preform rotating means for aligning the preform with a direction at the time of blow molding in the blow molding section.
[0028]
According to the present invention, by rotating the preform in accordance with the direction of the blow molding part, it is possible to control the temperature without moving the temperature adjustment means in accordance with the direction of the blow molding part, and the drive device is simplified accordingly. Can be.
[0029]
The invention of claim 9 is the invention according to claim 8,
The conveying member has a sprocket for rotating when heated by a heating unit, and the preform rotating means has a rack that meshes with the sprocket of the conveying member so as to be able to advance and retreat.
[0030]
According to the present invention, the preform can be reliably and accurately rotated with a simple configuration in which the rack that meshes with the sprocket is moved forward and backward using the sprocket for rotation provided on the conveying member. .
[0031]
In a tenth aspect of the present invention, when the preform is held by the conveying member provided in the conveying means and conveyed from the heating unit to the blow molding unit, the standby unit is arranged between the heating unit and the blow molding unit. A method for forming a container to obtain a container by blow molding after adjusting the temperature of the preform,
A step of waiting the temperature adjusting means at a position outside the conveyance region of the preform in the standby unit;
Moving the conveying member holding the preform by the conveying means from the heating unit to the standby unit;
After the conveying member is stopped by the standby unit, the temperature adjusting means is moved forward to the preform side, and the conveying member is positioned, and then the temperature adjustment surface of the preform is fixed by the temperature adjusting means for a predetermined time. Local temperature control And a process of
Above Local temperature control Thereafter, the step of retracting and retracting the temperature control means to a position outside the conveyance region of the preform,
A step of moving the blow member to the blow molding unit with the carrying member holding the preform by the carrying means;
A step of blow molding the preform with high-pressure air in the blow molding section;
It is characterized by including.
[0032]
According to the present invention, the temperature adjusting means is put on standby at a position outside the preform conveying area, and when the preform is conveyed, the conveying member is positioned, and then the temperature adjusting means Local temperature control Then, by retracting and retreating to a position outside the preform conveyance area, there is no problem in conveying the conveyance members. Local temperature control Can do this Local temperature control The preform having the desired shape and thickness can be formed by blow-molding the preform in the blow-molding section.
[0033]
The invention of claim 11 is directed to claim 10,
By the temperature control means Local temperature control It is characterized by having the process of rotating a preform according to the direction at the time of blow molding in a blow molding part after the process to perform.
[0034]
According to the present invention, the preform can be rotated in accordance with the direction of the blow molding part, so that the blow molding can be performed in an optimum state in the blow molding part.
[0035]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0036]
1-4 is a figure which shows the shaping | molding apparatus of the container concerning one embodiment of this invention.
[0037]
FIG. 1 is a plan view of a container forming apparatus.
[0038]
The apparatus for forming the container 38 is roughly divided into a preform molding station 12, a blow molding station 14, and a delivery unit 16 positioned between the preform molding station 12 and the blow molding station 14 on the machine base 10. Is provided.
[0039]
The preform molding station 12 has injection core molds (not shown) at two locations 180 degrees apart from each other at a rotation angle, and includes a turntable 18 that circulates and conveys the injection core molds intermittently along the rotation conveyance path. Have. In each stop position of the injection core mold, an injection molding part 22 is provided at a position facing the injection device 20, and an extraction part 24 is provided facing the injection molding part 22. The injection molding part 22 has an injection cavity mold 26 that is driven to be clamped relative to the injection core mold, and for example, six preforms 28 are simultaneously injection molded.
[0040]
On the other hand, in the take-out part 24, the injection core mold can be driven to release relatively from the preform 28, and the preform 28 can be taken out from the injection core mold.
[0041]
In this embodiment, the neck portion of the preform 28 is formed by a neck cavity mold (not shown), and the preform 28 is held by the neck cavity mold and the injection core mold and is rotated by the turntable 18. It is conveyed to the take-out part 24.
[0042]
And in the extraction part 24, a partial injection core type Mold release Later, the preform 28 is removed from the neck cavity mold. Mold release By doing so, the preform 28 is taken out.
[0043]
The blow molding station 14 includes four sprockets 30, a transport chain 32 spanned over them, and a device (not shown) that drives the sprockets, such as an electric motor that rotates one sprocket, and a rack attached to a hydraulic cylinder. And a conveying means 34 for circulating conveyance constituted by a pinion or the like attached to the sprocket.
[0044]
A plurality of, for example, 24 conveying members 36 are fixed to the conveying chain 32 at a predetermined distance, and the preform 28 or the container 38 is supported by each conveying member 36. The conveying path of the conveying member 36 includes a receiving unit 40 that receives the preform 28 from the delivery unit 16, a heating unit 42 that heats the preform 28 received by the receiving unit 40 to a temperature appropriate for blow molding, and a heating unit 42. A blow molding section 44 for obtaining a container 38 by stretch-blow molding the heated preform 28 and a container take-out section 46 for taking out the container 38 blow-molded by the blow molding section 44 to the outside of the apparatus are provided.
[0045]
A heating device 43 is disposed in the heating unit 42, and the heating device 43 is arranged with, for example, a plurality of infrared heaters extending along the conveyance path in the height direction of the preform, and is conveyed when passing through the heating device 43. The sprocket provided on the member 36 meshes with the rotation chain to rotate the preform, and the circumferential direction is heated evenly.
[0046]
The blow molding unit 44 has a blow cavity mold 48 that is clamped to the preform 28 by a blow mold clamping mechanism 45, and for example, two preforms 28 are blow molded.
[0047]
The container take-out unit 46 is configured to invert the container 38 by the take-out device 47 and take it out in an upright state.
[0048]
The delivery unit 16 delivers the preform 28 taken out from the take-out unit 24 of the preform molding station 12 to the receiving unit 40 of the blow molding station 14.
[0049]
In the take-out section 24 of the preform molding station 12, the number of preforms 28 simultaneously formed in the injection-molding section 22 is taken out. In the delivery section 16, for example, six preforms are taken out simultaneously in the take-out section 24. 28 are delivered to the receiving unit 40 two by two.
[0050]
In the preform molding station 12, the preform 28 is injection-molded in an upright state, whereas in the delivery unit 16, the preform 28 is turned upside down and the preform 28 is inverted on the blow molding station 14. Handing over in state.
[0051]
Further, in the blow molding station 14, the conveying means 34 intermittently conveys the conveying member 36, and the preform 28 heated between the heating unit 42 and the blow molding unit 44 is intermittently stopped to temporarily. Is set as a standby unit 50 to wait.
[0052]
Then, the preform 28 heated by passing through the heating device 43 of the heating unit 42 is waited for a predetermined time by the standby unit 50, so that the temperature difference between the outer surface and the inner surface of the preform 28 can be reduced. ing.
[0053]
The standby unit 50 includes a cooling unit 52 as a temperature adjusting unit that adjusts the temperature of the preform 28 conveyed from the heating unit 42, a positioning plate 54 as a positioning unit that positions the conveying member 36, and these cooling units. An advancing / retreating drive means 56 for advancing / retreating the means 52 and the positioning plate 54 with respect to the preform 28 and the conveying member 36 is provided.
[0054]
The cooling means 52, the positioning plate 54, and the advance / retreat driving means 56 are arranged outside the circulation conveyance path of the conveyance member 36 so as to effectively use the space outside the circulation conveyance path with relatively few devices.
[0055]
2 to 4 show the temperature control means of the standby unit.
[0056]
The cooling means 52 includes two pairs of openable and closable cooling blocks 58a and 58b, and the pair of cooling blocks 58a and 58b is supported by a pair of open / close rods 60a and 60b arranged in parallel vertically. It is in the state.
[0057]
One cooling block 58a of each set is fixed to one open / close rod 60a and penetrates the other open / close rod 60b. The other cooling block 58b is connected to the other open / close rod 60b. It is fixed and is in a state of passing through one open / close rod 60a.
[0058]
Further, the pair of opening / closing rods 60a, 60b are slidably arranged in the axial direction, and a rack 62 is formed at the position of the opposing surface of each opening / closing rod 60a, 60b. Between the racks 62, pinions 64 that mesh with the racks 62 are provided.
[0059]
The drive rod 68 of the open / close cylinder 66 is connected to one end of the other open / close rod 60b.
[0060]
Therefore, when the drive rod 68 of the open / close cylinder 66 is driven in the direction of arrow A in FIG. 4, the other open / close rod 60b slides in the direction of arrow A to move each cooling block 58b in the A direction. One open / close rod 60a slides in the direction of arrow B through the pinion 64, and one cooling block 58a is moved in the direction of arrow B to close the cooling blocks 58a and 58b. Further, the cooling blocks 58a and 58b sandwich the preform 28 so as to be in contact with only the both side surfaces of the body portion of the preform 28 so as to be cooled.
[0061]
Further, in this case, the cooling blocks 58a and 58b have a length extending over almost the entire length of the body portion of the preform 28, and the contact surface with the preform 28 has a shape corresponding to a part of the outer shape of both side surfaces of the preform 28. Has been.
[0062]
Further, here, the surfaces to be cooled, which are the temperature-controlled surfaces of the preform 28, are the both side surfaces positioned in the conveying direction of the preform 28, and this cooling has a substantially uniform thickness as a flat container during blow molding. A container 38 can be formed.
[0063]
The blow cavity mold 48 has a flat container-shaped cavity having a major axis on the split surface side, and the preform 28 is accommodated in the blow cavity mold 48 so that the cooling portion is positioned in the major axis direction. It has become.
[0064]
The positioning plate 54 is integrally attached to the lower part of the attachment plate 70 to which the cooling means 52 is attached, and is bent in an L shape toward the two conveying members 36 from there. Two engaging recesses 72 that engage with the two conveying members 36 are formed.
[0065]
The advancing / retracting drive means 56 includes a pair of parallel guide rods 74 that protrude in the horizontal direction on the back surface of the mounting plate 70, and a pair of guide receiving members that slidably receive the pair of guide rods 74 above the support frame 76. 78 and an advancing / retreating drive cylinder 82 attached between the guide receiving members 78 of the support frame 76 and connecting the drive rod 80 to the attachment plate 70. Then, by moving the mounting plate 70 forward and backward through the drive rod 80 by the forward / backward drive cylinder 82, the cooling blocks 58a and 58b and the positioning plate 54 can be simultaneously driven forward and backward relative to the preform 28 and the conveying member 36. ing.
[0066]
Therefore, in a state where the cooling blocks 58a, 58b are opened by the opening / closing cylinder 66, the cooling blocks 58a, 58b and the positioning plate 54 are moved backward by the advance / retreat driving cylinder 82 via the mounting plate 70, and the cooling block 58a is moved by the opening / closing cylinder 66. 58b is opened and the conveying member 36 holds the preform 28 and is conveyed from the heating unit 42. When the conveying member 36 is stopped, the cooling blocks 58a and 58b and the positioning are positioned by the advancing / retreating drive cylinder 82 via the mounting plate 70. When the plate 54 is advanced, the engaging recess 72 of the positioning plate 54 engages the side surface of the conveying member 36 to position the conveying member 36, and the cooling blocks 58 a and 58 b are positioned in the conveying direction of the preform 28. It will be in the state facing.
[0067]
In this state, the cooling blocks 58a and 58b are closed by the opening / closing cylinder 66, and the preform 28 is cooled for a predetermined time.
[0068]
Then, after a predetermined time has passed, the cooling blocks 58a and 58b are opened by the open / close cylinder 66, and the cooling blocks 58a and 58b and the positioning plate 54 are moved backward by the advance / retreat drive cylinder 82, so that the conveying member 36 and the preform 28 are released. It is ready to be transported.
[0069]
Next, a method for forming the container 38 using the above-described apparatus for forming the container 38 will be described.
[0070]
First, in the preform molding station 12, a plurality of, for example, six preforms 28 are injection-molded in the injection molding section 22, and the preforms 28 are held by a neck cavity mold and an injection core mold (not shown) to turn the disk. 18 to the take-out unit 24.
[0071]
In the take-out unit 24, the preform 28 is released from the injection core mold and the neck cavity mold, and a plurality of, for example, six preforms 28 are taken out.
[0072]
In the delivery unit 16, the preforms 28 simultaneously taken out by the take-out unit 24 are reversed two by two and delivered in an inverted state to the conveying member 36 located in the receiving unit 40 of the blow molding station 14.
[0073]
At the blow molding station 14, the preform 28 supported by the conveying member 36 in an inverted state is intermittently conveyed by the conveying means 34, and passes through the heating device provided in the heating unit 42 to bring the preform 28 to a temperature equal to or higher than the appropriate temperature for blow molding. After heating, it is intermittently stopped by the standby unit 50 before being conveyed to the blow molding unit 44.
[0074]
The appropriate temperature for blow molding here varies depending on the location of the preform and the specifications (thickness distribution, strength, etc.) required for the container.
[0075]
In the standby unit 50, the cooling blocks 58 a and 58 b and the positioning plate 54 are moved backward by the advance / retreat drive cylinder 82, and the cooling blocks 58 a and 58 b are opened by the open / close cylinder 66. In this state, the cooling blocks 58a and 58b and the positioning plate 54 are located outside the conveyance region of the preform 28, and are in a state that does not hinder the conveyance of the preform 28.
[0076]
Next, the cooling block 58a, 58b and the positioning plate 54 are preformed by the advancing / retreating driving cylinder 82 in a state where the conveying member 36 holding the preform 28 by the driving of the conveying means 34 stops moving from the heating unit 42 to the standby unit 50. 28 and the conveying member 36 are moved forward, the conveying member 36 is positioned by the positioning plate 54, the cooling blocks 58a and 58b are closed by the opening / closing cylinder 66, and the surface to be cooled positioned in the conveying direction of the preform 28 is cooled for a predetermined time. Cooled by blocks 58a, 58b.
[0077]
The temperature and contact time of the cooling block can be arbitrarily adjusted and set according to the thickness of the preform, the desired temperature difference, and the specifications required for the container.
[0078]
Next, after cooling for a certain time, the cooling blocks 58 a and 58 b and the positioning plate 54 are retracted and retracted to a position outside the conveying region of the preform 28 by the advance / retreat driving cylinder 82.
[0079]
In this state, the transport member 36 and the preform 28 are in a transportable state, and then the transport means 34 is driven to move the transport member 36 holding the preform 28 to the blow molding unit 44.
[0080]
If the preform 28 is blow-molded by high-pressure air in the blow molding section 44, the flat container 38 having a substantially uniform thickness is formed.
[0081]
As a matter of course, the shape of the container is not limited to a flat shape, but can be applied to containers such as polygonal ones whose distance from the preform wall is remarkably different in cross section.
[0082]
FIG. 5 to FIG. 9 are diagrams showing an embodiment for forming a desired portion thick or maintaining a thick state, not the embodiment for making the container wall uniform. is there.
[0083]
In this embodiment, the preform 28 intermittently conveyed one by one at the blow molding station and invertedly held by the blow molding conveying member 36 is conveyed from the heating unit (not shown) to the standby unit 50. In this state, the handle 86 is inserted into the preform 28.
[0084]
When inserting the handle 86, the conveying member 36 is positioned by the positioning means 94, and after inserting the handle 86, the body portion of the preform 28 corresponding to the engaging portion 88 of the handle 86 with the container body portion is cooled by the cooling means 96. Then, the preform 28 is rotated by the rotating means 98 so as to match the direction at the time of blow molding.
[0085]
The positioning means 94 includes a positioning plate 114 that engages with the conveying member 36 provided at a position facing the conveying member 36, and a positioning cylinder 116 that moves the positioning plate 114 forward and backward relative to the conveying member 36.
[0086]
The cooling means 96 includes an air nozzle 118 that can be moved forward and backward by the positioning cylinder 116 together with the positioning plate 114.
[0087]
The air nozzle 118 is supported at a height position corresponding to the body portion of the preform 28 corresponding to the engaging portion of the container 38 that engages with the engaging portion 88 of the handle 86 at the time of blow molding. The air nozzle 118 is movable in a direction intersecting with the advancing / retreating direction of the positioning plate 114 so that the air nozzle 118 does not interfere with the handle 86 inserted into the preform 28 at the time of advancing / retreating. Specifically, as shown in FIG. 9, the drive rod 126 of the drive cylinder 124 is attached to the attachment member 122 of the support rod 120 that holds the air nozzle 118 at a predetermined height, and the attachment member 122 is attached to the drive cylinder 124. The guide rod 130 is guided by the mounting bracket 128, and the drive rod 126 is driven by the drive cylinder 124, so that the air nozzle 118 is retracted from the handle 86, and the handle 86 and the preform 28 are The nozzle tip can be moved between a position facing the body portion of the preform 28.
[0088]
In the rotating means 98, a rack 132 arranged along the advancing / retreating direction of the positioning plate 114 is provided integrally with the positioning plate 114, and the rack 132 is pushed during heating by the heating unit 42 provided in the conveying member 36. It can mesh with the teeth of the sprocket 134 for rotating the reform 28.
[0089]
The positioning plate 114 can be moved in a direction away from the conveying member 36 by a distance by which the rack 132 rotates the conveying member 36 by 90 degrees by the preform rotating cylinder 136.
[0090]
Note that the positioning means 94 and the rotating means 98 are slightly raised and lowered by the lifting cylinder 100.
[0091]
Next, the operation state will be described.
[0092]
First, when the preform 28 held in an inverted state on the conveying member 36 is conveyed to the standby unit 50 and stopped, the positioning plate 114 is engaged with the conveying member 36 by the positioning cylinder 116 to position the conveying member 36.
[0093]
In this state, the handle 86 is lowered and the ring portion 84 of the handle 86 is inserted into the body portion of the preform 28.
[0094]
Next, when the rack 132 is lowered by the elevating cylinder 100, the rack 132 is engaged with the sprocket 134 attached to the conveying member 36, and the conveying member 36 is allowed to rotate via the sprocket 134.
[0095]
In this state, the air nozzle 118 is moved by the drive cylinder 124 so that the tip of the nozzle is positioned between the preform 28 and the handle 86, and the body portion of the container that engages with the engaging portion 88 of the handle 86 at the time of blow molding. The body portion of the corresponding preform 28 is cooled.
[0096]
Next, the positioning plate 114 and the rack 132 are moved backward by the preform rotating cylinder 136, and the conveying member 36 is rotated 90 degrees so that the position of the handle 86 is aligned with the direction of the handle receiving recess of the blow cavity mold of the blow molding section.
[0097]
Further, from this state, if the rack 132 is raised by the elevating cylinder 100 and the positioning plate 114 and the rack 132 are retracted from the conveying member 36 by the positioning cylinder 116, the conveying member 36 holding the preform 28 with the handle 86 is conveyed. Make it possible.
[0098]
The present invention is not limited to the above-described embodiment, and can be changed to various embodiments within the scope of the gist of the present invention.
[0099]
For example, in the above-described embodiment, the one-stage container forming apparatus has been described. However, the present invention is not limited to this example, and can be applied to a two-stage container forming apparatus.
[0100]
In the above embodiment, the case where six preforms are injection-molded in the injection molding part and two preforms are blow-molded in the blow molding part has been described. It can be changed.
[0101]
Furthermore, although the case where the cooling unit is used as the temperature control unit has been described in the above embodiment, the present invention is not limited to this example, and a heating unit may be employed.
[0102]
In addition, a plurality of air nozzles may be provided, or a porous member such as a filter may be disposed between the air nozzles and the outer wall of the preform to cool the air more widely than in the above-described embodiment and evenly. .
[0103]
In any case, it is important to partially control the temperature of the preform at the standby part immediately before blow molding.
[0104]
[Brief description of the drawings]
FIG. 1 is a plan view showing a container forming apparatus according to an embodiment of the present invention.
FIG. 2 is a side view of the standby unit in FIG. 1;
FIG. 3 is a plan view in which a part of FIG. 2 is omitted.
4 is a front view as seen from the cooling block side of FIG. 2;
FIG. 5 is a partial side view showing another embodiment of the present invention.
6 is a plan view seen from the opposite side of FIG. 5. FIG.
7 is a plan view showing a state in which the conveying member is positioned and cooled from the state of FIG.
FIG. 8 is a plan view showing a state in which a preform is rotated from the state shown in FIG.
FIG. 9 is a front view of a cooling unit.
[Explanation of symbols]
28 preform
34 Conveying means
36 Conveying member
38 containers
42 Heating section
44 Blow molding part
50 standby section
52 Cooling means
54 Positioning plate
56 Advance / Retreat Drive
58a, 58b Cooling block
72 Engaging recess
82 Forward / backward drive cylinder
94 Positioning means
96 Cooling means
98 Rotating means
114 Positioning plate
118 Air nozzle
132 racks
134 Sprocket

Claims (11)

A heating part for heating the preform made of synthetic resin to a temperature appropriate for blow molding, a blow molding part for blow molding the preform heated by the heating part, and heating between the heating part and the blow molding part A container molding apparatus comprising: a standby unit that waits for the preform; and a transport unit that transports the preform while holding the preform on a transport member from the heating unit through the standby unit to the blow molding unit,
The standby unit includes a temperature adjusting unit that performs local temperature adjustment on the preform conveyed from the heating unit, a positioning unit that positions the conveying member, and the temperature adjusting unit and the positioning unit that are transferred to the preform and the conveying unit. Advancing / retreating drive means for advancing / retreating the member individually or integrally,
The said positioning means contacts the said conveyance member, and positions the conveyance member, The shaping | molding apparatus of the container characterized by the above-mentioned. In claim 1,
The container forming apparatus, wherein the temperature adjusting means is a cooling means for cooling the preform. In claim 1,
The container forming apparatus, wherein the temperature adjusting means is a heating means for heating the preform. In claim 1,
The container forming apparatus according to claim 1, wherein the temperature adjustment means is a temperature adjustment member that adjusts a local temperature by contacting a temperature adjustment surface of the preform. In claim 1,
The container forming apparatus according to claim 1, wherein the temperature adjusting means is a temperature adjusting member that adjusts the local temperature in a non-contact manner with the temperature adjustment surface of the preform. In claim 1,
The transport member forms a circulation transport path that is circulated and transported by the transport means;
The container forming apparatus, wherein the temperature adjusting means, the positioning means, and the advance / retreat driving means are arranged outside the circulation conveyance path. In claim 1,
In the preform, the surface located in the transport direction of the preform is a temperature control surface,
The container forming apparatus according to claim 1, wherein the temperature adjusting means is movable back and forth in a direction crossing a conveying direction of the preform. In claim 1,
The container forming apparatus according to claim 1, wherein the standby section includes a preform rotating means for aligning the preform with a direction at the time of blow molding in the blow molding section. In claim 8,
The container forming apparatus, wherein the conveying member has a sprocket for rotating when heated by a heating unit, and the preform rotating means has a rack that meshes with the sprocket of the conveying member so as to be movable back and forth. . When conveying the preform from the heating unit to the blow molding unit with the conveyance member holding the preform by the conveying means, the temperature of the preform is adjusted by the standby unit arranged between the heating unit and the blow molding unit and then blown. A container molding method for forming a container by molding,
A step of waiting the temperature adjusting means at a position outside the transport area of the preform in the standby unit;
Moving the conveying member holding the preform by the conveying means from the heating unit to the standby unit;
Said stopping the conveying member to the standby unit, the temperature control means is moved forward to the preform side, after positioning the transport member, the local temperature by temperature control means to be temperature control surface of a fixed time the preform Adjusting , and
After the local temperature adjustment , the step of retracting and retreating the temperature adjustment means to a position outside the conveyance region of the preform,
A step of moving the blow member to the blow molding unit with the transport member holding the preform by the transport unit;
A step of blow molding the preform with high-pressure air in the blow molding section;
A method for forming a container, comprising: In claim 10,
A method for forming a container, comprising a step of rotating a preform in accordance with a direction at the time of blow molding in a blow molding portion after the step of adjusting the local temperature by the temperature adjusting means.

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