Temperature adjustment mold, resin container manufacturing apparatus, and manufacturing method

Abstract

A temperature adjustment mold for adjusting the temperature of a bottomed resin pre-mold of an injection-molded product has one or more adjustment portions that face a portion of the outer circumferential surface of the stem portion of the pre-mold and locally heat a given portion in the circumferential direction of the pre-mold. The adjustment portions are arranged in a manner that gaps are formed in the circumferential direction, and the mounting position can be adjusted in the circumferential direction.

Description

Technical Field

[0001] This invention relates to a mold for temperature regulation, an apparatus for manufacturing resin containers, and a method for manufacturing them. Background Technology

[0002] Previously, hot preform blow molding apparatuses were known as one of the manufacturing devices for resin containers. Hot preform blow molding apparatuses utilize the heat retained during the injection molding of a preform to blow mold resin containers. Compared to cold preform blow molding apparatuses, they are advantageous in that they can manufacture a variety of resin containers with excellent appearance.

[0003] Typically, the preform immediately after injection molding has several low-temperature sections extending axially in the circumferential direction, resulting in temperature unevenness (temperature deviation) in the circumferential direction. Therefore, in hot preform blow molding cycles, in order to suppress the temperature deviation of the preform or to impart the desired temperature distribution to the preform suitable for container shaping, a preform temperature adjustment process is performed between the injection molding and blow molding processes.

[0004] In this temperature adjustment process, for example, a cylindrical heating mold (heating tank mold) that houses the preform is sometimes used, and the temperature is adjusted by heating the preform from the outer periphery using radiant heat from the heating tank mold. In this case, by placing the cylindrical heating tank mold close to the low-temperature portion of the preform, temperature deviation of the preform is suppressed. Furthermore, a method has been proposed where, during the molding of flat containers, a temperature control device is used to adjust the temperature of the preform by alternating pairs of heating and cooling blocks in the circumferential direction (e.g., Patent Document 1).

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent No. 3595613 Summary of the Invention

[0008] The problem that the invention aims to solve

[0009] In conventional temperature adjustment using cylindrical heating molds, areas other than the low-temperature regions of the preform are heated, making it sometimes difficult to properly and adequately eliminate temperature deviations. Furthermore, in the molding of flat containers, selectively heating the portion of the preform corresponding to the long side of the container can improve the container's wall thickness distribution. Therefore, a temperature adjustment mold capable of selectively heating a given portion of the preform in the circumferential direction is desired.

[0010] Technical means for solving problems

[0011] One aspect of the present invention is a temperature adjustment mold for adjusting the temperature of a resin preform with a bottom shape after injection molding. The temperature adjustment mold includes one or more adjustment sections facing a portion of the outer peripheral surface of the main body of the preform, for localized heating of a given portion of the preform in the circumferential direction. The adjustment sections are configured with a gap in the circumferential direction and can be adjusted in their mounting position in the circumferential direction.

[0012] Invention Effects

[0013] According to one aspect of the invention, a given portion of the preform in the circumferential direction can be selectively heated. Attached Figure Description

[0014] Figure 1 This is a diagram schematically illustrating the structure of the blow molding apparatus of this embodiment.

[0015] Figure 2 This is a longitudinal cross-sectional view of the temperature adjustment section.

[0016] Figure 3 This is an exploded perspective view showing an example of the structure of a temperature adjustment mold for a temperature adjustment section.

[0017] Figure 4 This is a diagram showing an example of the configuration of the middle section of the temperature adjustment unit.

[0018] Figure 5 This is a flowchart illustrating the steps involved in the blow molding process. Detailed Implementation

[0019] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0020] In the embodiments, to facilitate understanding, structures and elements other than the main parts of the invention are simplified or omitted in the description. Furthermore, in the accompanying drawings, the same symbols are used to denote the same elements. Additionally, the shapes, dimensions, etc., of the elements shown in the drawings are schematic representations and do not represent actual shapes, dimensions, etc.

[0021] Figure 1 This is a schematic diagram illustrating the structure of the blow molding apparatus 20 of this embodiment. The blow molding apparatus 20 of this embodiment is a hot preform method (also known as a one-stage method) that uses the heat retained during injection molding (internal heat) to blow mold a container without cooling the preform 10 to room temperature.

[0022] The blow molding apparatus 20 includes an injection molding unit 21, a temperature adjustment unit 22, a blow molding unit 23, a take-out unit 24, and a conveying mechanism 26. The injection molding unit 21, the temperature adjustment unit 22, the blow molding unit 23, and the take-out unit 24 are arranged at positions that rotate by a given angle (e.g., 90 degrees) around the conveying mechanism 26 each time.

[0023] (Conveying mechanism 26)

[0024] Conveying mechanism 26 is equipped with Figure 1 The transfer plate 28 moves by rotating around an axis perpendicular to the paper surface. Figure 1 (Not shown in the figure). On the transfer plate 28, at given angles, there are one or more neck molds 27 that hold the neck of the pre-plasticized preform 10 or the resin container (hereinafter referred to as the container). Figure 1 (Not shown in the figure). The conveying mechanism 26 moves the transfer plate 28 by 90 degrees each time, thereby conveying the preform 10 (or container) held by the neck mold 27 in the order of injection molding section 21, temperature adjustment section 22, blow molding section 23, and take-out section 24. In addition, the conveying mechanism 26 also has a lifting mechanism (a longitudinal mold opening and closing mechanism), a mold opening mechanism for the neck mold 27, and performs actions such as lifting and lowering the transfer plate 28, closing the mold of the injection molding section 21, and opening the mold (demolding).

[0025] (Injection Molding Section 21)

[0026] Injection molding section 21 includes an injection cavity mold and an injection core mold (not shown in the figure), for manufacturing... Figure 2 The preform 10 is shown. An injection device 25 for supplying resin material, which serves as the raw material for the preform 10, is connected to the injection molding section 21.

[0027] In the injection molding section 21, the aforementioned injection cavity mold, injection core mold, and neck mold 27 of the delivery mechanism 26 are closed to form a mold space in the shape of a preform. Then, by flowing resin material from the injection device 25 into such a preform-shaped mold space, a preform 10 is manufactured in the injection molding section 21.

[0028] For example, the preform 10 has an overall shape that is a bottomed cylindrical shape with one end open and the other end closed. A neck is formed at the end of the preform 10 on the open side.

[0029] Furthermore, the materials for the container and the preform 10 are thermoplastic synthetic resins, which can be appropriately selected according to the intended use of the container. Specific types of materials include, for example, PET (polyethylene terephthalate), PEN (polyethylene naphthalate), PCTA (polycyclohexanediol terephthalate), Tritan (TRITAN: a copolyester manufactured by Eastman Chemical Company), PP (polypropylene), PE (polyethylene), PC (polycarbonate), PES (polyethersulfone), PPSU (polyphenylsulfone), PS (polystyrene), COP / COC (cyclic olefin polymer), PMMA (polymethyl methacrylate: propylene), PLA (polylactic acid), etc.

[0030] It should be noted that even when the injection molding section 21 is opened, the neck mold 27 of the conveying mechanism 26 remains closed and continues to hold and convey the preform 10 unchanged. The number of preforms 10 simultaneously molded in the injection molding section 21 (i.e., the number of containers that can be simultaneously molded by the blow molding device 20) can be appropriately set.

[0031] (Temperature adjustment unit 22)

[0032] The temperature adjustment unit 22 includes a temperature adjustment mold 30 capable of accommodating the preform 10. The temperature adjustment unit 22 uses the temperature adjustment mold 30 to homogenize and remove temperature deviations in the preform 10 manufactured by the injection molding unit 21, adjusting the temperature of the preform 10 to a temperature suitable for blow molding (e.g., approximately 90°C to 105°C) and a temperature distribution suitable for the shape of the container to be formed. Furthermore, the temperature adjustment unit 22 also functions to cool the preform 10 at its high temperature after injection molding. It should be noted that, although not specifically limited, the temperature adjustment unit may also include a temperature adjustment mold component (temperature adjustment rod: not shown) inserted inside the preform 10.

[0033] Figure 2 This is a longitudinal cross-sectional view of the temperature adjustment unit 22. Figure 3 This is an exploded perspective view showing a structural example of the temperature adjustment mold 30 for the temperature adjustment section 22.

[0034] The temperature adjustment mold 30 is a structure divided into at least three parts along the axial (vertical) direction of the preform 10, comprising an upper mold 31, a middle mold 32, and a lower mold 33 sequentially from the top. The lower mold 33 is mounted on a support platform 34 fixed on a base 29, and an upper support plate 35 is disposed on the upper surface of the upper mold 31. The support platform 34 and the upper support plate 35 are connected by a plurality of pillars (not shown) extending along the axial direction of the preform 10. Therefore, the upper mold 31, the middle mold 32, and the lower mold 33 are fixed in a positioned state by being clamped by the support platform 34 and the upper support plate 35.

[0035] The upper mold 31 is a mold facing the outer peripheral surface near the neck of the (opposite) preform 10, and has a circular opening through which the preform 10 can be inserted. A heating element (not shown) such as a belt heater (annular heater) is installed on the upper mold 31, and the temperature of the upper mold 31 can be adjusted to a given temperature by the heating element. Furthermore, the upper mold 31 abuts against the upper end of the middle mold 32, thus supporting the middle mold 32.

[0036] The lower mold 33 is a mold facing the outer peripheral surface of the bottom of the (opposite) preform 10, and has a concave curved surface 33a on its upper surface side that mimics the shape of the bottom of the preform 10. A heating element (not shown) such as a belt heater is installed in the lower mold 33, and the temperature of the lower mold 33 can be adjusted to a given temperature by the heating element. Furthermore, the lower mold 33 abuts against the lower end of the middle mold 32, thus supporting the middle mold 32.

[0037] The middle mold 32 is an example of an adjustment part (adjustment member), which is a mold disposed between the upper mold 31 and the lower mold 33 and facing (opposite) the outer peripheral surface of the main body of the preform 10. In addition, the bottom surface of the upper mold 31 and the upper surface of the middle mold 32, and the bottom surface of the middle mold 32 and the upper surface of the lower mold 33 are respectively engaged by a fitting structure, for example, in such a way that a heat insulation member is sandwiched between them.

[0038] like Figure 2 , Figure 3 As shown, the intermediate mold 32 is composed of a strip with a top-view arc shape (at least the inner circumferential surface facing the preform 10 is arc-shaped) and a constant axial length. Furthermore, the intermediate mold 32 can also have a shape with a constant radial thickness. For example, the intermediate mold 32 is a strip that is a quarter circle in top view, capable of covering 1 / 4 of the outer circumference of the preform 10. Additionally, as... Figure 2 As shown, a heating component 32a, such as a rod-shaped heater, is built into the middle section mold 32, and the temperature of the middle section mold 32 can be adjusted to a given temperature by the heating component 32a.

[0039] One or more intermediate molds 32 are arranged in the circumferential direction of the preform 10 such that they partially cover the outer peripheral surface of the main body of the preform 10. That is, in the parts where the intermediate molds 32 are not arranged, gaps are formed in the circumferential direction of the temperature adjustment mold 30. By partially arranging the intermediate molds 32 in the circumferential direction, the main body of the preform 10 can be temperature-adjusted by the temperature adjustment mold 30 as follows.

[0040] First, the main body of the preform 10 is heated in the circumferential direction facing the middle mold 32 using heat from the middle mold 32. On the other hand, the main body of the preform 10 is not heated in the circumferential direction where the middle mold 32 is not located, and is naturally cooled by heat dissipation to the air. Thus, in the temperature adjustment mold 30, desired circumferential areas can be selectively heated, and overheating of areas other than the desired areas can be prevented, making it easier to make the circumferential temperature distribution of the preform 10 close to the desired state.

[0041] Figure 4 This is a diagram showing an example of the configuration of the middle section module 32 of the temperature adjustment unit 22.

[0042] Figure 4 (A) represents an example of configuring a mid-section module 32. Figure 4 In case (A), the main body of the pre-plasticized preform 10 is heated using the intermediate mold 32 in a portion of the pre-plasticized preform 10's circumferential direction (a range of 90 degrees in the circumferential direction of the pre-plasticized preform 10 relative to the left side of the pre-plasticized preform 10). Conversely, in the region of the pre-plasticized preform 10 where the intermediate mold 32 is not located in the circumferential direction, the main body of the pre-plasticized preform 10 is naturally cooled by heat dissipation to the air.

[0043] in addition, Figure 4 (B) shows an example of two mid-section modules 32 arranged opposite each other in a point-symmetric manner, spaced apart circumferentially. Figure 4 In case (B), the main body of the pre-plasticized preform 10 is heated at two locations in the circumferential direction of the pre-plasticized preform 10 (located on the upper and lower sides of the pre-plasticized preform 10 in the figure, respectively within a 90-degree range in the circumferential direction of the pre-plasticized preform 10). On the other hand, in the areas of the pre-plasticized preform 10 where the middle section mold 32 is not located, the main body of the pre-plasticized preform 10 is naturally cooled by heat dissipation to the air.

[0044] in addition, Figure 4 (C) represents an example of arranging two mid-section modules 32 adjacently. Figure 4 In case (C), on the left half of the figure, the main body of the preform 10 is heated using the middle section mold 32. On the other hand, on the right half of the figure, the main body of the preform 10 is naturally cooled by heat dissipation to the air.

[0045] also, Figure 4 The configuration of the intermediate molds 32 shown in the figures is merely an example, and the position of the intermediate molds 32 can be appropriately changed according to the temperature deviation of the preform 10, the specifications of the container of the object being shaped, etc. For example, when two intermediate molds 32 are arranged separately with a gap along the circumference, the intermediate molds 32 can also be arranged offset from a point-symmetrical position. Alternatively, three intermediate molds 32 can be arranged circumferentially.

[0046] (Blow Molding Section 23)

[0047] return Figure 1 The blow molding section 23 stretches and blow molds the pre-plasticized blank 10, which has been temperature-adjusted by the temperature adjustment section 22, to manufacture a container.

[0048] The blow molding section 23 includes a blow molding cavity mold, a bottom mold, a stretching rod, and an air inlet component (blow molding core mold, not shown) that serve as a pair of parting molds corresponding to the shape of the container. The blow molding section 23 performs blow molding while stretching the pre-plasticized preform 10. As a result, the pre-plasticized preform 10 can be shaped into the shape of the blow molding cavity mold to manufacture a container.

[0049] (Removal section 24)

[0050] The removal section 24 is configured to open the neck of the container manufactured by the blow molding section 23 from the neck mold 27 and remove the container to the outside of the blow molding apparatus 20.

[0051] (Explanation of blow molding method)

[0052] Next, the blow molding method of the blow molding apparatus 20 based on this embodiment will be described.

[0053] Figure 5 This is a flowchart illustrating the steps of the blow molding method. In this embodiment, before each step (S101 to S104) of the blow molding method described later is performed, a mold adjustment step (S100) is performed on the temperature adjustment mold 30.

[0054] (Step S100: Mold Adjustment Process)

[0055] The mold adjustment process is a process of adjusting the temperature adjustment mold 30 of the temperature adjustment section 22 according to the temperature deviation of the preform 10 and the shape of the container to be shaped.

[0056] As an example, in order to suppress the temperature deviation of the preform 10, the following operation is performed in the mold adjustment process. In the following description, it is assumed that the adjustment is performed so that the deviation of the temperature distribution of the preform 10 in the circumferential direction and the wall thickness distribution of the container is reduced.

[0057] First, the blow molding device 20 is tested to obtain information on the temperature distribution of the pre-plasticized preform 10 or the wall thickness distribution of the container before adjustment.

[0058] For example, if there is a temperature distribution deviation in the circumferential direction of the pre-plasticized blank 10, the operator adjusts the position of the middle section mold 32 of the temperature adjustment mold 30 to face the low-temperature part of the pre-plasticized blank 10. As a result, during the trial run, the low-temperature part of the pre-plasticized blank 10 is locally heated by the middle section mold 32, and the circumferential temperature deviation of the pre-plasticized blank 10 is reduced.

[0059] In addition, when adjusting the temperature adjustment mold 30 based on the wall thickness distribution of the container manufactured through trial operation, the following steps can be taken.

[0060] In one-stage blow molding, the high-temperature regions of the preform 10 have greater heat retention, making it easier to stretch. That is, the thinner-walled sections of the container correspond to the high-temperature regions of the preform 10. Conversely, the low-temperature regions of the preform 10 have less heat retention compared to the high-temperature regions, making it more difficult to stretch. That is, the thicker-walled sections of the container correspond to the low-temperature regions of the preform 10.

[0061] Therefore, when adjusting the temperature adjustment mold 30 based on the wall thickness distribution of the container, the thinner parts of the container wall are regarded as the high-temperature parts of the preform 10, and the thicker parts of the container wall are regarded as the low-temperature parts of the preform 10. The position of the middle mold 32 can be adjusted in the same way as above.

[0062] Furthermore, as another example, when adjusting the temperature adjustment mold 30 according to the shape of the container being shaped, the operator adjusts the position of the circumferentially oriented middle mold 32 to face the portion of the preform 10 with a high circumferential stretch ratio. For example, in the case of molding an eccentric container, the temperature adjustment mold 30 is adjusted so that the middle mold 32 faces the corresponding portion on the long axis side of the container. As a result, the heat retention of the preform 10 at the portion with a high stretch ratio is high, making it easier to deform the preform 10 to suit the container shape, thus improving the wall thickness distribution of the container.

[0063] Here, when assembling the temperature adjustment mold 30, the lower mold 33 is first placed on the support platform 34. Next, a middle mold 32 is placed between the upper mold 31 and the lower mold 33, and a columnar component (not shown) is placed between the upper mold 31 and the lower mold 33 in the area where the middle mold 32 is not placed. Then, an upper support plate 35 is placed on the upper side of the upper mold 31, and a support column (not shown) is used to connect the upper support plate 35 to the support platform 34, clamping and fixing the temperature adjustment mold 30 in place. Alternatively, the columnar component can be removed from between the upper mold 31 and the lower mold 33.

[0064] Once the above mold adjustment process is completed, proceed with the blow molding cycle processes shown below.

[0065] (Step S101: Injection Molding Process)

[0066] In step S101, in the injection molding section 21, resin is injected from the injection device 25 into the mold space of the preform shape formed by the injection cavity mold, the injection core mold and the neck mold 27 of the conveying mechanism 26 to produce the preform 10.

[0067] In step S101, when the injection molding of the preform 10 is completed, the injection molding section 21 opens the mold, and the preform 10 is demolded from the injection cavity mold and the injection core mold. Then, the transfer plate 28 of the conveying mechanism 26 moves by rotating a given angle, and the preform 10 held in the neck mold 27 is conveyed to the temperature adjustment section 22.

[0068] (Step S102: Temperature Adjustment Process)

[0069] Next, in the temperature adjustment unit 22, temperature adjustment is performed to bring the temperature of the preform 10 close to the temperature suitable for final blow molding.

[0070] like Figure 2 As shown, in the temperature adjustment process, the preform 10 is housed in the temperature adjustment mold 30. Thus, the injection-molded preform 10 is temperature-adjusted by the temperature adjustment mold 30 to achieve the desired circumferential temperature distribution.

[0071] After the temperature adjustment process, the transfer plate 28 of the conveying mechanism 26 moves by rotating a given angle, and the pre-plasticized preform 10, which has been temperature adjusted and is held in the neck mold 27, is conveyed to the blow molding section 23.

[0072] (Step S103: Blow molding process)

[0073] Next, the container is blow-molded in the blow molding section 23.

[0074] First, the blow molding cavity mold is closed, housing the preform 10 within the mold space. The air inlet member (blow molding core) is lowered, bringing it into contact with the neck of the preform 10. Then, the tension rod (longitudinal tension member) is lowered, pressing the bottom of the preform 10 from its inner surface. Simultaneously, while performing longitudinal tension as needed, blow molding gas is supplied from the air inlet member, thereby performing transverse tension on the preform 10. As a result, the preform 10 bulges out and is shaped to fit tightly against the mold space of the blow molding cavity mold, and is blow molded into a container. Furthermore, the bottom mold remains in a position below the preform 10, not in contact with its bottom, before the blow molding cavity mold closes, and rapidly rises to the molding position before or after mold closing.

[0075] (Step S104: Container Removal Process)

[0076] When blow molding is complete, the blow molding cavity mold and bottom mold are opened. This allows the container to move from the blow molding section 23.

[0077] Next, the transfer plate 28 of the conveying mechanism 26 moves by a given rotation angle, and the container is conveyed to the take-out section 24. In the take-out section 24, the neck of the container opens from the neck mold 27, and the container is taken out of the blow molding apparatus 20.

[0078] The above completes the series of processes in the blow molding cycle. Then, by moving the transfer plate 28 of the conveying mechanism 26 by a given rotation angle, the processes S101 to S104 described above are repeated. During the operation of the blow molding apparatus 20, the manufacturing of four sets of containers, each with a time difference of one process, is performed in parallel.

[0079] The effects of this embodiment will be explained below.

[0080] The temperature adjustment mold 30 in this embodiment has a structure comprising one or more intermediate molds 32 that face a portion of the outer peripheral surface of the main body of the preform 10 and locally heat a given portion in the circumferential direction. In this embodiment, by adjusting the circumferential mounting position of the intermediate molds 32, the circumferential temperature deviation of the preform 10 can be suppressed at the low-temperature portion facing the preform 10.

[0081] In addition, during the molding of the eccentric container, by adjusting the circumferential installation position of the middle mold 32 so that the middle mold 32 faces the part corresponding to the long diameter side of the container, the circumferential temperature distribution of the preform 10 can be made into a state suitable for the shaping of the container, and the wall thickness distribution of the container can also be improved.

[0082] In this embodiment, in the area where the intermediate mold 32 is not located, the preform 10 is not heated but is naturally cooled by heat dissipation to the air. Therefore, it is possible to suppress overheating in areas of the preform 10 that do not require heating in the circumferential direction, and the circumferential temperature distribution of the preform 10 can be easily and appropriately controlled. In addition, compared with a structure that heats the entire circumferential direction, the energy consumption in the temperature adjustment mold 30 can be suppressed.

[0083] When the preform 10 is made of polyethylene (PE) or high-density polyethylene (HDPE), the temperature suitable for blow molding is close to its melting point. Furthermore, these materials are known to lack strain hardening characteristics compared to materials like PET, making wall thickness adjustment during blow molding difficult. Strain hardening refers to the characteristic that during the blow molding process, the weakest part of the preform (usually the part with the highest temperature) first reaches its yield point, and then the weaker parts begin to elongate, increasing its strength through molecular orientation until the wall thickness becomes uniform. Therefore, when blow molding PE or HDPE preforms, temperature adjustment before blow molding is crucial. However, according to this embodiment, temperature adjustment of the preform suitable for PE or HDPE container molding can be easily performed.

[0084] This invention is not limited to the above-described embodiments. Various improvements and design changes can be made without departing from the spirit of this invention.

[0085] In the above embodiment, the circumferential length of the intermediate mold 32 is described as being within a 90-degree range (a quarter circle when viewed from above) of the circumferential length of the preform 10. However, the circumferential length of the intermediate mold 32 can be appropriately varied. For example, an intermediate mold 32 with a circumferential length corresponding to a range of 45 to 180 degrees (preferably 60 to 120 degrees) of the circumferential length of the preform 10 can also be used. Furthermore, the circumferential temperature distribution of the preform 10 can be adjusted by selecting and using one or more (e.g., one to four) intermediate molds 32 from a variety of intermediate molds 32 with different circumferential lengths. In this case, multiple intermediate molds 32 with different circumferential lengths can also be used in combination.

[0086] Furthermore, while the above embodiment describes an example using a preform 10 with a circular cross-section, preforms with cross-sections other than circular can also be used. For example, in the case of manufacturing flat containers, a preform with a generally rectangular cross-section can also be used.

[0087] Furthermore, the embodiments disclosed herein should be considered illustrative rather than restrictive in all respects. The scope of the invention is defined not by the foregoing description but by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0088] (Symbol Explanation)

[0089] 10…Pre-plastic preform, 20…Blow molding device, 21…Injection molding section, 22…Temperature adjustment section, 23…Blow molding section, 30…Temperature adjustment mold, 31…Upper mold, 32…Middle mold, 33…Lower mold.

Claims

1. A temperature adjustment mold for adjusting the temperature of a bottomed resin-made pre-molded blank after injection molding, wherein the temperature adjustment mold has one or more adjustment sections that face a portion of an outer circumferential surface of a stem portion of the pre-molded blank, and locally heat a given portion in a circumferential direction of the pre-molded blank, the adjustment sections are arranged in a manner that a gap is formed in the circumferential direction, and are capable of adjusting an installation position in the circumferential direction, the temperature adjustment mold further has: a lower mold that faces a bottom portion of the pre-molded blank, and supports a lower end of the adjustment section; and an upper mold that faces a neck portion of the pre-molded blank, and supports an upper end of the adjustment section, the adjustment section is positioned by being sandwiched by the lower mold and the upper mold.

2. The temperature adjustment mold according to claim 1, wherein the adjustment sections are arranged in a plurality in the circumferential direction with a gap therebetween.

3. A resin-made container manufacturing apparatus that has: an injection molding section that injection-molds a bottomed resin-made pre-molded blank; a temperature adjustment section that adjusts a temperature distribution in a circumferential direction of the pre-molded blank including retained heat at the time of injection molding, using the temperature adjustment mold according to claim 1 or 2; and a blow molding section that blow-molds the pre-molded blank after temperature adjustment, and manufactures a resin-made container.

4. A resin-made container manufacturing method that has: an injection molding process that injection-molds a bottomed resin-made pre-molded blank; a temperature adjustment process that adjusts a temperature distribution in a circumferential direction of the pre-molded blank including retained heat at the time of injection molding, using the temperature adjustment mold according to claim 1 or 2; and a blow molding process that blow-molds the pre-molded blank after temperature adjustment, and manufactures a resin-made container. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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