Operation mechanism, blow molding mechanism, split mold, and mold device

Abstract

To suppress formation of scratches and galling at a boundary part between components operating in a direction orthogonal to a direction of mold closing and opening in a stationary side mold and a movable side mold of a mold device.SOLUTION: A blow molding mechanism 1 includes: a first split mold 11 that is a first component as a component operating in a second direction orthogonal to a first direction of mold closing and opening between a stationary side mold and a movable side mold; a second split mold 12 that is a second component as a component operating in the second direction and not in contact with the first split mold 11; and a slide component 13 that is removably fixed to the second split mold 12 and slidable relative to the first split mold 11.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an operating mechanism, a blowing mechanism, a split mold, and a mold device.

Background Art

[0002] In injection blow molding, which is a molding method that performs injection molding (injection molding) and blow molding (blowing) in two stages, a preform, which is an intermediate molded product, is molded by injection molding, and air is blown into the preform and stretched by blow molding to form a final molded product such as a container. In blow molding, a split mold that can be separated into a plurality of parts is used (for example, Patent Document 1). Some split molds close and open in a direction orthogonal to the direction in which the mold device closes and opens. In addition, the split mold may be composed of a plurality of split molds.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When the split mold is composed of a plurality of split molds, if there is a gap at the boundary portion between adjacent split molds, it will cause molding defects. Therefore, it is necessary to close and open the mold with adjacent split molds in contact. However, due to the structure, when it is necessary to shift the timing of starting the mold opening of adjacent split molds, sliding occurs at the boundary portion between adjacent split molds. In addition, the boundary portion between adjacent split molds is also a portion where the surface pressure becomes high due to the influence of the mold clamping force of the mold device. For these reasons, the boundary portion between adjacent split molds may slide under a high surface pressure, so there is a high risk of scratches and abrasions. An object of the present invention is to suppress the occurrence of scratches and nicks at the boundary between members that operate in a direction orthogonal to the direction in which the fixed mold and the movable mold of the mold device close and open the mold.

Means for Solving the Problems

[0005] The present invention completed for such an object is a first member that is a member that operates in a second direction orthogonal to a first direction in which a fixed mold and a movable mold close and open the mold, a second member that is the member and does not contact the first member, and a sliding member that is detachably fixed to the second member and slidable with respect to the first member. It is a motion mechanism characterized by having Here, the first member and the sliding member may be characterized by having a higher hardness than the second member. Further, the sliding member may be characterized by having a higher hardness than the first member. Further, the first member may be characterized by having a higher hardness than the sliding member. Further, the first member is a first split mold as a split mold that closes and opens the mold in the second direction, and the second member is a second split mold as the split mold that does not contact the first split mold. It may be characterized by Further, the present invention constitutes a part of a mold used for blow molding of an intermediate molded product, closes the mold before the start of the blow molding, and opens the mold after the completion of the blow molding. A first split mold that forms and grips a part of the intermediate molded product, and after the completion of the blow molding, the split mold that opens after the first split mold opens, and forms and grips a part of the intermediate molded product. It has a second split mold and a sliding member that is detachably joined to the first split mold and slidable with respect to the second split mold, and the directions in which the first split mold and the second split mold close and open the mold are orthogonal to the directions in which the fixed mold and the movable mold of the mold device close and open the mold. It is a blow molding mechanism characterized by Further, the present invention is a split mold having an operating mechanism, wherein the operating mechanism includes a first member that is a member that operates in a second direction orthogonal to a first direction in which a fixed mold and a movable mold close and open, a second member that is the member and does not contact the first member, and a sliding member that is detachably fixed to the second member and is slidable with respect to the first member. The split mold is characterized by having these components. Further, the present invention is a mold apparatus including a fixed mold on the fixed side, an intermediate mold having an operating mechanism, and a movable mold on the movable side, wherein the operating mechanism includes a first member that is a member that operates in a second direction orthogonal to a first direction in which the fixed mold on the fixed side and the movable mold close and open, a second member that is the member and does not contact the first member, and a sliding member that is detachably fixed to the second member and is slidable with respect to the first member. The mold apparatus is characterized by having these components.

Effects of the Invention

[0006] According to the present invention, it is possible to suppress the occurrence of scratches and bites at the boundary portion between members that operate in a direction orthogonal to the direction in which the fixed mold and the movable mold of the mold apparatus close and open.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0008] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. <Configuration of Blow Molding Mechanism> FIG. 1 is a cross-sectional view showing an example of the configuration of the blow molding mechanism 1 according to the present embodiment. FIG. 1 shows a state of viewing the blow molding mechanism 1 from the top side to the bottom side in the vertical direction. Therefore, the front side of the drawing in FIG. 1 is the top side in the vertical direction, and the back side of the drawing is the bottom side in the vertical direction. FIG. 2 is a diagram showing an example of the operation of the opening and closing of the second split mold 12 and the sliding member 13 fixed to the second split mold 12. Although the illustration of the first split mold 11 is omitted in FIG. 2, actually, the first split mold 11 is disposed on the front side of the drawing in FIG. 2.

[0009] The blow molding mechanism 1 shown in FIG. 1 is a mechanism applied to an intermediate mold and a movable mold provided in a mold device that performs injection blow molding. The intermediate mold to which the blow molding mechanism 1 is applied is a so-called rotary mold disposed between a fixed mold (not shown) and a movable mold. Specifically, the fixed mold is disposed on the first side in the first direction with respect to the intermediate mold. Also, the movable mold is disposed on the second side in the first direction with respect to the intermediate mold. Injection blow molding is a molding method that performs injection molding (hereinafter referred to as "injection molding") and blow molding (hereinafter referred to as "blow molding") in two steps. Injection molding is performed in a state where the fixed mold and the intermediate mold are closed. Also, blow molding is performed in a state where the movable mold and the intermediate mold are closed.

[0010] In injection blow molding, first, in injection molding which is the first step of molding, a preform (not shown) which is an intermediate molded product is molded. Next, in blow molding which is the second step of molding, a final molded product is molded by blowing high-pressure air into the inside of the preform and stretching it. Examples of the method of blowing air into the inside of the preform in blow molding include a method of protruding a stretching rod (not shown) capable of outputting high-pressure air into the preform.

[0011] FIG. 1 shows a substantially cylindrical bottle container 200 as a final molded product, which is blow-molded within a mold in a closed state. The direction of the axis 300 of the bottle container 200 in the closed state of the mold is the left-right direction of the drawing, and is the same direction as the direction in which the intermediate mold to which the blow molding mechanism 1 is applied and the movable mold open and close. Hereinafter, the direction in which the intermediate mold to which the blow molding mechanism 1 is applied and the movable mold open and close (the left-right direction of the drawing in FIG. 1) is referred to as the "first direction". Further, the right side of the drawing in the first direction is referred to as the "first side", and the left side of the drawing in the first direction is referred to as the "second side". Also, the direction orthogonal to the first direction (the up-down direction of the drawing in FIG. 1) is referred to as the "second direction". Further, the upper side of the drawing in the second direction is referred to as the "third side", and the lower side of the drawing in the second direction is referred to as the "fourth side".

[0012] The shaded portion of the cross-section of the bottle container 200 indicates the portion where the preform is stretched by blow molding. However, in reality, the portion that is stretched by blow molding and the portion that is not stretched are not clearly distinguished. For this reason, the boundary portion between the shaded portion and the hatched portion in the cross-section of the bottle container 200 in FIG. 1 only indicates an approximate position.

[0013] The bottle container 200 has a mouth portion 201 and a body portion 202. Note that the mouth portion 201 and the body portion 202 are ways of referring to parts in the shape of the continuous bottle container 200, and there is no clear boundary. For this reason, in the present embodiment, the mouth portion 201 is the portion that is gripped by the first split mold 11 described later and injection molded. Specifically, the mouth portion 201 is near the end on the first side in the first direction of the bottle container 200, that is, the first-side surface 251 of the protruding portion 206 that protrudes in the direction away from the axis 300 of the bottle container 200, and the portion including the male screw 207 that is screwed with the female screw of the cap (not shown) of the bottle container 200. Also, the body portion 202 is the portion that is molded by the second split mold 12 described later. Specifically, the body portion 202 is the portion other than the mouth portion 201 of the bottle container 200.

[0014] The injection and blow molding mechanism 1 has a first split mold 11 and a second split mold 12 which are molds. The first split mold 11 is a split mold capable of opening and closing in the second direction, and functions as a mold constituting an intermediate mold for performing injection molding and blow molding. The first split mold 11 forms the mouth part 201 in a mold-closed state during injection molding, and grips the mouth part 201 in a mold-closed state during blow molding. Also, the first split mold 11 releases the mouth part 201 by opening the mold after completion of blow molding. The first split mold 11 is also called a mouth split mold or a split.

[0015] The second split mold 12 is a split mold capable of opening and closing in the second direction, and functions as a mold constituting the movable-side mold for performing blow molding. The second split mold 12 forms the main body part 202 in a mold-closed state during blow molding. Also, the second split mold 12 releases the main body part 202 by opening the mold after completion of blow molding. The second split mold 12 is also called a blow split mold. In FIG. 1, the boundary portion 400 between the first split mold 11 and the second split mold 12 is shown as being in contact, but actually, a slight gap that does not affect the quality of the molded product is formed. For this reason, the first split mold 11 and the second split mold 12 are not in contact.

[0016] Also, the injection and blow molding mechanism 1 has a sliding member 13 between the first split mold 11 and the second split mold 12. The sliding member 13 is detachably fixed to the second split mold 12 and is slidable with respect to the first split mold 11. The sliding member 13 has a predetermined thickness in the first direction and is composed of a metal member with high wear resistance. The material of the sliding member 13 is not particularly limited, but for example, it is composed of a so-called oil-free plate in which a solid lubricant is blended in the material and oil supply of lubricating oil is not required. As shown in FIG. 2, the sliding member 13 is detachably fixed to the second split mold 12 with bolts 14. However, the method of fixing the sliding member 13 to the second split mold 12 is not limited to the method of fixing with bolts 14.

[0017] Returning to FIG. 1, the sliding member 13, while being fixed to the second split mold 12, opens and closes together with the second split mold 12 when the second split mold 12 opens and closes in the second direction. When the sliding member 13 opens and closes, at the boundary portion 100 with the first split mold 11, it slides while opening and closing with respect to the first split mold 11.

[0018] The thickness d of the sliding member 13 in the first direction is designed as follows. That is, with the sliding member 13 fixed to the second split mold 12, the first split mold 11 and the second split mold 12 do not contact each other, and the thickness d is designed such that the first split mold 11 can slide with respect to the sliding member 13.

[0019] The left figure of FIG. 2 shows the state where the second split mold 12 is closed. As described above, the sliding member 13 is fixed to the second split mold 12 with bolts 14. A preform is placed in the circular hole 15 formed in the state where the second split mold 12 is closed. When blow molding is performed on the preform, the preform stretches and the bottle container 200 (see FIG. 1) is formed. The sliding member 13 forms a circular hole having a diameter larger than that of the hole 15 of the second split mold 12 in the state of being closed in the second direction.

[0020] The right figure of FIG. 2 shows the state where the second split mold 12 is opened in the second direction. When the blow molding is completed, first, the first split mold 11 (see FIG. 1) that has been gripping the mouth portion 201 of the bottle container 200 starts to open in the second direction. As a result, the mouth portion 201 of the bottle container 200 is released. Immediately thereafter, the second split mold 12 that has been gripping the main body portion 202 of the bottle container 200 starts to open in the second direction. As a result, the main body portion 202 of the bottle container 200 is released. Then, the bottle container 200 starts to free fall toward the ground side in the vertical direction. In this way, the mold for blow molding and the bottle container 200, which is the final molded product, are separated.

[0021] Returning to Fig. 1, in the injection molding mechanism 1, as described above, first, the first split mold 11 starts to open the mold, and immediately after that, the second split mold 12 starts to open the mold. Thereby, the bottle container 200 is separated from the mold in which the injection molding was performed. At the boundary portion 100 between the first split mold 11 and the sliding member 13, sliding occurs when the first split mold 11 starts to open the mold. On the other hand, a distance is provided at the boundary portion 400 between the first split mold 11 and the second split mold 12 such that no sliding occurs.

[0022] <Comparative Example> Fig. 3 is a cross-sectional view showing an example of the configuration of a conventional injection molding mechanism. The conventional injection molding mechanism shown in Fig. 3 has a mouth split mold and a blow split mold, respectively corresponding to the first split mold 11 and the second split mold 12 of the injection molding mechanism 1 in Fig. 1 described above. However, the conventional injection molding mechanism shown in Fig. 3 does not have the sliding member 13 (see Fig. 1) unlike the injection molding mechanism 1 in Fig. 1. Further, the conventional injection molding mechanism shown in Fig. 3 has sliding occurring at the boundary portion 400 between the mouth split mold and the blow split mold, unlike the injection molding mechanism 1 in Fig. 1.

[0023] In the conventional injection molding mechanism shown in Fig. 3, the surface pressure becomes high at the boundary portion 400 between the mouth split mold and the blow split mold due to the influence of the first-direction clamping force generated during the mold clamping of the mold device. For this reason, there is a high risk of scratches and nicks occurring due to sliding. In particular, when the hardness of the blow split mold with respect to the mouth split mold is low, the blow split mold is likely to be scratched and nicked. As a method for suppressing the occurrence of scratches and nicks on the blow split mold, a method of changing the material of the blow split mold to one with high hardness can be considered. However, if the material of the blow split mold is made to have high hardness, the workability of the blow split mold as a mold will decrease.

[0024] In contrast, the blow molding mechanism 1 shown in FIG. 1 described above is configured to be slidable at the boundary portion 100 between the sliding member 13 fixed to the second mold half 12 and the first mold half 11, and not to come into contact at the boundary portion 400 between the first mold half 11 and the second mold half 12. Therefore, also in the blow molding mechanism 1 of FIG. 1, a clamping force is generated when the mold is clamped, similar to the conventional blow molding mechanism shown in FIG. 3, but the above-described problems are less likely to occur.

[0025] Here, in the blow molding mechanism 1 of FIG. 1, since sliding occurs at the boundary portion 100 between the sliding member 13 and the first mold half 11, there is a possibility that scratches and abrasions may occur at the boundary portion 100. However, even if scratches and abrasions occur at the boundary portion 100, unlike the boundary portion 400, the boundary portion 100 is located at a position relatively far from the bottle container 200 which is the product. Therefore, the risk of wear powder generated by contact adhering to the bottle container 200 is low. Also, by configuring the first mold half 11 and the sliding member 13 with a high-hardness material having wear resistance, the risk of scratches and abrasions occurring at the boundary portion 100 can be reduced.

[0026] The relationship among the hardness of the first mold half 11, the hardness of the second mold half 12, and the hardness of the sliding member 13 in the blow molding mechanism 1 is not particularly limited. For example, the following relationships can be cited as examples. That is, the first mold half 11 and the sliding member 13 may be made of a material having a higher hardness than the second mold half 12. Thereby, since the first mold half 11 and the sliding member 13 can be made of a material having a higher hardness than the second mold half 12, wear, scratches, and abrasions can be suppressed. Also, since the second mold half 12 is a member that does not slide against either the first mold half 11 or the sliding member 13, scratches and abrasions due to sliding do not occur in the first place. As a result, a material with low hardness and easy to process can be adopted, so that the workability can be improved.

[0027] Also, when the hardness of the second die 12 can be lowered, there is no need to perform heat treatment or plating to increase the hardness of the second die 12, so the dimensional stability of the second die 12 is improved. That is, when the second die 12 is heat-treated, the stress generated inside during cooling after the heat treatment may cause a shape change called "warpage" and make the dimensions of the second die 12 unstable. Also, when plating is applied to the second die 12, the plating may peel off because it cannot withstand the sliding in the state where the clamping force of the mold device is generated. If there is no need to perform heat treatment or plating, the risk of such problems occurring is suppressed.

[0028] Also, a material with a higher hardness than the first die 11 may be adopted for the sliding member 13. Thereby, even if contact occurs at the boundary portion 100 between the first die 11 and the sliding member 13, the sliding member 13 is less likely to wear. The sliding member 13 has restrictions on its shape such as the thickness d in the first direction, the length in the second direction, and the length in the top-bottom direction, and restrictions on its material when compared with the first die 11. For this reason, since the sliding member 13 tends to have a higher maintenance frequency such as replacement than the first die 11, the maintenance frequency such as replacement can be reduced by making the hardness higher than that of the first die 11.

[0029] On the other hand, for example, when the sliding member 13 is treated as a member that is assumed to be regularly replaced due to wear, scratches, biting, etc., a material with a higher hardness than the sliding member 13 may be adopted for the first die 11. In this case, since the material of the first die 11 can be made harder than that of the second die 12, even if contact occurs at the boundary portion 100 between the first die 11 and the sliding member 13, the first die 11 is less likely to wear. That is, for the sliding member 13, which is relatively easy to replace and does not incur high maintenance costs, while assuming replacement, the maintainability of the first die 11, which is not easy to replace and incurs high maintenance costs, can be prioritized, so there are advantages in terms of cost and operation.

[0030] To summarize the above, the operating mechanism to which the present invention is applied only needs to have the following configuration and can take various embodiments. That is, the injection molding mechanism 1 as an operating mechanism according to the present embodiment is a first member as a member that operates in a second direction orthogonal to a first direction in which a fixed mold and a movable mold are closed and opened, the first split mold 11; a second split mold 12 as a second member that operates in the second direction and does not contact the first split mold 11; and a sliding member 13 that is detachably fixed to the second split mold 12 and is slidable with respect to the first split mold 11. The injection molding mechanism is characterized by having these components.

[0031] As a result, the injection molding mechanism 1 as an operating mechanism has a first split mold 11 as a first member that operates in a second direction orthogonal to a first direction in which a fixed mold and a movable mold are closed and opened, and a second split mold 12 as a second member that operates in the second direction and does not contact the first split mold 11. A sliding member 13 that is slidable with respect to the first split mold 11 is detachably fixed to the second split mold 12. As a result, it is possible to suppress the occurrence of scratches and nicks at the boundary portion 400 between the first split mold 11 as the first member that operates in the second direction and the second split mold 12 as the second member.

[0032] Here, the first split mold 11 and the sliding member 13 may be characterized by having a higher hardness than the second split mold 12. Thereby, since the hardness of the second split mold 12 that does not slide against either the first split mold 11 or the sliding member 13 can be lowered, the workability of the second split mold 12 can be improved. Furthermore, when the hardness of the second split mold 12 can be lowered, there is no need to perform heat treatment or plating to increase the hardness of the second split mold 12. As a result, as described above, the dimensional stability of the second split mold 12 is improved. In addition, since the first split mold 11 and the sliding member 13 can employ a material with a higher hardness than the second split mold 12, it is possible to suppress the occurrence of wear, scratches, and nicks.

[0033] Also, the sliding member 13 may be characterized by having a higher hardness than the first split mold 11. Thereby, even if contact occurs at the boundary portion 100 between the first split mold 11 and the sliding member 13, the sliding member 13 is less likely to wear, so the frequency of replacing the sliding member 13 can be reduced.

[0034] Further, the first split mold 11 may be characterized by having a higher hardness than the sliding member 13. Accordingly, since the material of the first split mold 11 can be made of a material having a higher hardness than that of the second split mold 12, even if contact occurs at the boundary portion 100 between the first split mold 11 and the sliding member 13, the first split mold 11 is less likely to wear.

[0035] In addition, the blow molding mechanism 1 to which the present invention is applied constitutes a part of a mold used for blow molding of a preform which is an intermediate molded product, closes the mold before the start of blow molding, and opens the mold after the completion of blow molding. Among the split molds, a first split mold 11 that forms and grips a part of the intermediate molded product, and a second split mold 12 that opens the mold after the completion of blow molding and after the first split mold 11 opens the mold, and forms and grips a part of the preform, and a sliding member 13 that is detachably joined to the first split mold 11 and is slidable with respect to the second split mold 12. The blow molding mechanism is characterized in that the directions in which the first split mold 11 and the second split mold 12 close and open the mold are orthogonal to the directions in which the fixed-side mold and the movable-side mold close and open the mold.

[0036] Accordingly, the blow molding mechanism 1 has a first split mold 11 that opens the mold in a second direction orthogonal to a first direction in which the fixed-side mold and the movable-side mold close and open the mold, and a second split mold 12 that opens the mold in the second direction and does not contact the first split mold 11. A sliding member 13 that is slidable with respect to the first split mold 11 is detachably fixed to the second split mold 12. As a result, it is possible to suppress the occurrence of scratches and nicks at the boundary portion 400 between the first split mold 11 that opens the mold in the second direction and the second split mold 12.

[0037] In addition, the mold to which the present invention is applied is a mold having an injection molding mechanism 1 as an operating mechanism, and the injection molding mechanism 1 includes a first mold 11 as a first member that operates in a second direction orthogonal to a first direction in which a fixed mold and a movable mold are closed and opened, a second mold 12 as a second member that operates in the second direction and does not contact the first mold 11, and a sliding member 13 that is detachably fixed to the second mold 12 and slidable with respect to the first mold 11. The mold is characterized in that the closing and opening directions of the first mold 11 and the second mold 12 are orthogonal to the direction in which the fixed mold and the movable mold are closed and opened.

[0038] As a result, the injection molding mechanism 1 of the mold includes a first mold 11 as a first member that operates in a second direction orthogonal to a first direction in which a fixed mold and a movable mold are closed and opened, and a second mold 12 as a second member that operates in the second direction and does not contact the first mold 11. A sliding member 13 that is slidable with respect to the first mold 11 is detachably fixed to the second mold 12. As a result, it is possible to suppress the occurrence of scratches and bites at the boundary portion 400 between the first mold 11 as the first member that operates in the second direction and the second mold 12 as the second member.

[0039] In addition, the mold apparatus to which the present invention is applied is a mold apparatus including a fixed mold, an intermediate mold having an injection molding mechanism 1 as an operating mechanism, and a movable mold. The injection molding mechanism 1 includes a first mold 11 as a first member that operates in a second direction orthogonal to a first direction in which the fixed mold and the movable mold are closed and opened, a second mold 12 as a second member that operates in the second direction and does not contact the first mold 11, and a sliding member 13 that is detachably fixed to the second mold 12 and slidable with respect to the first mold 11. The mold apparatus is characterized in that the closing and opening directions of the first mold 11 and the second mold 12 are orthogonal to the direction in which the fixed mold and the movable mold are closed and opened.

[0040] As a result, the injection molding mechanism 1 between the intermediate mold and the movable mold included in the mold device operates in a second direction orthogonal to the first direction in which the fixed mold and the movable mold close and open, and includes a first split mold 11 as a first member, and a second split mold 12 as a second member that operates in the second direction and does not contact the first split mold 11. A sliding member 13 that is slidable with respect to the first split mold 11 is detachably fixed to the second split mold 12. As a result, it is possible to suppress the occurrence of scratches and nicks at the boundary portion 400 between the first split mold 11 as the first member that operates in the second direction and the second split mold 12 as the second member.

[0041] <Others> As described above, the embodiments of the present invention have been described. However, the present invention is not limited to the above-described embodiments. Also, the effects of the present invention are not limited to those described in the above embodiments. For example, the configurations of the injection molding mechanism 1 shown in FIG. 1 are merely examples for achieving the object of the present invention and are not particularly limited. Also, the operation state of the second split mold 12 to which the sliding member 13 is fixed shown in FIG. 2 is merely an example and is not particularly limited.

[0042] For example, in the above-described embodiment, the final molded product is the bottle container 200, but the final molded product does not have to be a bottle container. It may be other molded products formed by injection blow molding, which is a molding method that performs injection molding and blow molding in two steps.

[0043] Also, the injection molding mechanism 1 according to the above-described embodiment is premised on being applied to an apparatus that performs injection blow molding, but can also be applied to an apparatus that performs only blow molding.

[0044] Also, in the above-described embodiment, the second split mold 12 starts to open immediately after the first split mold 11 starts to open, but the order of starting to open is not particularly limited. That is, the second split mold 12 may start to open before the first split mold 11, or the first split mold 11 and the second split mold 12 may start to open simultaneously.

[0045] In addition, in the above-described embodiment, an example in which the present invention is applied to a mold apparatus including an intermediate mold has been described. However, the injection molding mechanism 1 can also be applied to a mold apparatus that does not include an intermediate mold. For example, the present invention can also be applied to a mold apparatus including a fixed-side mold and a movable-side mold, in which the mold closing and mold opening of the split mold are performed in a state where a surface pressure equal to or higher than a certain level due to mold clamping is applied to the split mold.

[0046] In the above-described embodiment, the first member according to the present invention is described as the first split mold 11, and the second member according to the present invention is described as the second split mold 12, but this is merely an example. The first member according to the present invention may be a member constituting the mold apparatus and operating in a second direction orthogonal to the first direction in which the fixed-side mold and the movable-side mold of the mold apparatus perform mold closing and mold opening. Further, the second member according to the present invention is also a member constituting the mold apparatus and operating in a second direction orthogonal to the first direction in which the fixed-side mold and the movable-side mold of the mold apparatus perform mold closing and mold opening, and may be a member that does not contact the first member.

Explanation of Reference Numerals

[0047] 1... Injection molding mechanism, 11... First split mold, 12... Second split mold, 13... Sliding member, 14... Bolt, 15... Hole, 100, 400... Boundary portion, 200... Bottle container, 201... Mouth portion, 202... Body portion

Claims

1. A first member which is a member that operates in a second direction orthogonal to a first direction in which a fixed mold and a movable mold close and open; A second member which is the member and does not contact the first member; A sliding member which is detachably fixed to the second member and is slidable with respect to the first member; Characterized by having; An operating mechanism.

2. The first member and the sliding member are characterized by having a higher hardness than the second member, The operating mechanism according to Claim 1.

3. The sliding member is characterized by having a higher hardness than the first member, The operating mechanism according to Claim 2.

4. The first member is characterized by having a higher hardness than the sliding member, The operating mechanism according to Claim 2.

5. The first member is a first split mold as a split mold that closes and opens in the second direction, and the second member is a second split mold as the split mold that does not contact the first split mold, The operating mechanism according to any one of Claims 1 to 4.

6. Among the split molds that constitute a part of a mold used for blow molding of an intermediate molded product, close the mold before the start of the blow molding, and open the mold after the completion of the blow molding, a first split mold that forms and grips a part of the intermediate molded product; After the completion of the blow molding, a second split mold that opens after the first split mold opens and forms and grips a part of the intermediate molded product; A sliding member that is detachably joined to the first split mold and is slidable with respect to the second split mold; Having; Characterized in that the closing and opening directions of the first split mold and the second split mold are orthogonal to the direction in which the fixed mold and the movable mold close and open. A blow molding mechanism.

7. A split mold having an operating mechanism, The operating mechanism is, A first member which is a member that operates in a second direction orthogonal to a first direction in which a fixed mold and a movable mold close and open; A second member which is the member and does not contact the first member; A sliding member which is detachably fixed to the second member and is slidable with respect to the first member; Characterized by having; A split mold.

8. A mold device including a fixed mold, an intermediate mold having an operating mechanism, and a movable mold, The operating mechanism is, A first member which is a member that operates in a second direction orthogonal to a first direction in which the fixed mold and the movable mold close and open; a second member that is the member and does not contact the first member; a sliding member that is detachably fixed to the second member and slidable with respect to the first member; characterized by having a die device.

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