Molding system, molded article extraction machine, molding device, and method for manufacturing hollow molded article

Abstract

Provided are a molding system, a molded article extraction machine, a molding device, and a method for manufacturing a hollow molded article with which it is possible to take out a molded article from a blow mold without touching an opening part or an inner surface. A molded article extraction machine 120 of a molding system 100 is provided with an insert part 12, a contact part 13, a recessed part 14, and a suction port 12b. The insert part 12 is inserted into a hollow molded article 20 via an opening part 21 serving as a blow pin extraction port of the hollow molded article 20. The contact part 13 is arranged around the insert part 12 and contacts an outer peripheral surface of the hollow molded article 20 at a prescribed distance from the opening part 21 serving as the blow pin extraction port. The recessed part 14 is provided between the insert part 12 and the contact part 13, and constitutes a closed space in which the opening part 21 serving as the blow pin extraction port is accommodated with the outer peripheral surface of the hollow molded article 20 contacting the contact part 13, the closed space being continuous with the inside of the hollow molded article 20. The suction port 12b is provided in the insert part 12 and sucks the ambient atmosphere.

Description

Technical Field

[0001] The present invention relates to a molding system, a molded product take-out machine, a mold device, a molding machine, and a method for manufacturing a hollow molded product.

Background Art

[0002] Conventionally, blow molding has been widely used for molding hollow resin containers such as PET bottles. As is well known, in blow molding, after a hollow preform (parison) is placed in a blow mold, a blow pin is placed inside the preform. By blowing blow air from the blow pin into the preform, the preform is molded into a shape corresponding to the cavity of the blow mold.

[0003] The molded product is removed from the blow mold by a molded product take-out machine after the blow mold is opened. At the time of this removal, a method of dropping the molded product from the blow mold (for example, Patent Document 1) or a method of removing the molded product from the blow mold while supporting the flange portion (cap screw portion) of the preform that protrudes outside the blow mold when the preform is placed in the blow mold is adopted (for example, Patent Document 2).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] In recent years, from the perspective of environmental protection, there has been a demand for thinning and weight reduction of resin containers, as well as a change in material to biodegradable resins, and it has become necessary to manufacture resin containers with lower strength than in the past. In the manufacturing process of such resin containers, if the above-described dropping method is used when taking out the molded product from the blow mold, there is a possibility that the molded product will be frequently damaged.

[0006] On the other hand, in the case of the taking-out method that supports the flange portion of the above-described preform, since each molded product can be taken out individually, damage to the molded product can be avoided. However, in a resin container that does not have a portion such as a flange portion protruding from the blow mold, it is difficult to use a method that supports the flange portion.

[0007] As a method for individually taking out a resin container that does not have a portion protruding from the blow mold, it is also conceivable to take out the molded product from the blow mold while supporting the inner peripheral surface of the opening of the molded product into which the blow pin is inserted. However, in the case of a resin container used for storing food and drinks such as beverages, it is necessary to avoid contact of a support member for taking out the molded product with the opening or the inner surface of the molded product from a hygienic perspective.

[0008] An object of the present invention is to provide a molding system capable of carrying out a molded product from a blow mold without touching the opening or the inner surface of a hollow molded product, even in the case of a molded product that does not have a portion protruding from the blow mold.

[0009] Another object of the present invention is to provide a molded product take-out machine suitable for use in a molding system.

[0010] Still another object of the present invention is to provide a mold device suitable for use in a molding system.

[0011] Another object of the present invention is to provide a method for manufacturing a hollow molded product using a molding system.

Means for Solving the Problems

[0012] The configuration of the present invention for solving the above problems will be described below. For ease of understanding, the configuration of the present invention will be described with reference numerals attached to the drawings, but the use of the reference numerals does not limit the present invention to the embodiments.

[0013] In order to achieve the above object, the molding system of the present invention is premised on a molding system for manufacturing a hollow molded product 20 by blow molding. And the molding system according to the present invention includes a molding machine 110 and a molded product take-out machine 120. The molding machine 110 includes a mold device 114 in which a hollow molded product is blow-molded in cavities (221, 241, 251). The molded product take-out machine 120 adsorbs the hollow molded product molded in the mold device 114 with the adsorption part 10 and carries it out of the mold device. In this molded product take-out machine 120, the adsorption part 10 includes an insert part 12, a contact part 13, a recess 14 provided between the insert part 12 and the contact part 13, and a suction port 12b. The insert part 12 is inserted into the hollow molded product through an opening 21 that serves as an outlet for the blow pin of the hollow molded product. The contact part 13 is arranged at a distance from the insert part 12 and contacts a portion of the outer peripheral surface 22 of the hollow molded product 20 that is a predetermined distance away from the opening 21 that serves as the outlet for the blow pin. And the recess 14 is provided between the insert part 12 and the contact part 13, and when the portion of the outer peripheral surface 22 of the hollow molded product where the opening 21 that serves as the outlet for the blow pin of the hollow molded product is formed is accommodated in the recess 14 in a state where the contact part 13 contacts the outer peripheral surface 22 of the hollow molded product, it constitutes a closed space 26 that communicates with the internal space 24 of the hollow molded product. The suction port 12b is provided in the insert part 12 and sucks the air in the internal space 24 and the closed space 26.

[0014] In this molding system, for example, the insert part 12 is inserted through the blow pin outlet (opening 21) in the hollow molded product molded in the mold device 114. When the mold device is opened with the surrounding atmosphere being sucked from the suction port 12b of the insert part, the hollow molded product 20 moves toward the proximal end side of the insert part 12 due to the airflow flowing in from the opening 21 of the hollow molded product which is the blow pin outlet. Due to this movement of the hollow molded product, the opening 21 of the hollow molded product which is the blow pin outlet is received in the recess 14. Further, the outer peripheral surface 22 of the hollow molded product at a predetermined distance from the opening 21 which becomes the blow pin outlet abuts against the abutting part 13, and a series of closed spaces 26 are formed by the recess 14 and the internal space 24 of the hollow molded product 20. Even in this state, since the suction of the surrounding atmosphere continues from the suction port 12b of the insert part 12, the outer peripheral surface 22 of the hollow molded product is pressed against the abutting part 13, and the outer peripheral surface 22 of the hollow molded product can be reliably supported by the abutting part 13. By moving the hollow molded product in such a state, even a hollow molded product having no part such as a flange part protruding from the mold device can be carried out from the mold device 114 without the insert part 12 touching the opening or the inner surface of the hollow molded product.

[0015] In a more specific adsorption part 10, the insert part 12 and the abutting part 13 are connected and a recess is formed between the insert part and the abutting part. Base plate 11 is provided. An additional suction port 13c for sucking the outer peripheral surface 22 of the hollow molded product is provided on the abutting surface 13b of the abutting part 13 with the hollow molded product. Further, the insert part 12, Base plateInside the insert part 11 and the contact part 13, an air flow path 13d communicating with the suction port 12b and the additional suction port 13c is formed. Note that the suction port 12b of the insert part 12 and the additional suction port 13c can also be used as ejection ports for ejecting pressurized gas. When adopting a configuration in which the insert part 12 is provided with an ejection port for ejecting pressurized gas, the insert part 12 is inserted from the opening 21 in the hollow molded product molded in the mold device, and when pressurized gas is ejected from the ejection port 12b of the insert part, the hollow molded product 20 is in a state of being pressed against the mold device. In this state, when the mold device other than the mold part corresponding to the bottom of the hollow molded product 20 facing the tip of the insert part 12 is in the split-open state, the bottom of the hollow molded product 20 is held in a state of being pressed against the mold part corresponding to the bottom. In this state, the contact part 13 is advanced, and when the contact part 13 has advanced to a position where it contacts the outer peripheral surface 22 of the hollow molded product, suction of the ambient atmosphere is started from the suction port 12b of the insert part 12. As a result, the outer peripheral surface 22 of the hollow molded product 20 is pressed against the contact part 13, and the outer peripheral surface 22 of the hollow molded product 20 is supported by the contact part 13. Therefore, the outer peripheral surface of the hollow molded product can be surely brought into contact with the contact surface 13b of the contact part 13. Also, when detaching the taken-out molded product from the molded product take-out machine, by switching the suction port 13c of the contact part 13 to an ejection port and ejecting pressurized gas from the ejection port 13c of the contact part 13, the molded product can be detached more surely.

[0016] Of course, the contact part 13 may be provided with an elastic body 13e on the contact surface with the hollow molded product. When the elastic body 13e is provided, the shape of the contact surface of the contact part 13 deforms into a state that conforms to the outer peripheral surface of the molded product, so the contact area between the outer peripheral surface of the molded product and the contact surface of the contact part 13 increases. As a result, the outer peripheral surface of the molded product can be more surely supported by the contact part.

[0017] The mold device 114 used in the molding system of the present invention includes a first mold member 252 that constitutes a part of the cavity 251, and a second mold member 253 that is provided adjacent to the first mold member 252 and constitutes a part of the cavity 251. The cavity forming surface 251Aa of the first mold member 252 and the cavity forming surface 251Ab of the second mold member are arranged in a configuration different from the closed state, and the hollow molded product molded in the cavity can be adsorbed and held in a state of being in contact with the cavity forming surface 251Aa of the first mold member. In this mold device, since the hollow molded product is adsorbed and held by the mold device, the hollow molded product is held by the mold device even when the mold device is opened in a split mold state in order to carry out the molded product. Therefore, the molded product can be easily carried out.

[0018] The first mold member 252 has a first bottom wall surface portion 251Aa of the bottom wall surface 251A of the cavity 251 as a cavity forming surface. The second mold member has a second bottom wall surface portion 251Ab of the bottom wall surface 251A of the cavity 251 as a cavity forming surface. The first bottom wall surface portion 251Aa of the first mold member 252 and the second bottom wall surface portion 251Ab of the second mold member 253 constitute the bottom wall surface 251A of the cavity 251 when in the closed state. After the hollow molded product 20 is molded, the mold device 114 can be configured to adsorb and hold the hollow molded product against the first bottom wall surface portion 251Aa of the first mold member 252.

[0019] Specifically, after the hollow molded product is molded, the second mold member 253 is moved so as to form a recess 254 between the second bottom wall surface portion 251Ab of the second mold member 253 and the outer surface of the hollow molded product. Then, the mold device 114 can be set in a suction holding state in which the hollow molded product is suction-held on the first bottom wall surface portion 251Aa of the first mold member 252 by reducing the pressure in the recess 254. Also, by setting the inside of the recess 254 to a non-reduced pressure state, it can be configured to be in a non-suction holding state in which the hollow molded product is not suction-held on the first bottom wall surface portion 251Aa of the first mold member 252. The suction holding state is obtained by making the inside of the recess 254 a suction state, and the non-suction holding state is obtained by making the inside of the recess 254 a non-suction state or an increased pressure state. The suction holding state can be realized by providing a suction port 255a that is exposed in the recess 254 and sucks the atmosphere in the recess 254. According to these configurations, the hollow molded product is suction-held in a state of abutting against the first bottom wall surface portion 251Aa which is the constituent surface of the cavity 251 of the first mold member 252. In the above configuration, since the hollow molded product is suction-held by the mold device, even if the mold device is opened in a split mold state to carry out the molded product, the molded product is held by the mold device. Therefore, the outer peripheral surface of the hollow molded product can be surely abutted by the abutting portion 13, and the hollow molded product can be carried out more easily.

[0020] Also, the mold device 114 may include a plurality of mold members 205 that form walls other than the bottom wall surface 251A of the cavity 251. In this case, after the plurality of mold members 205 are separated from the molded product, it may be configured to maintain a suction state for a predetermined period, or after the plurality of mold members 205 are separated from the hollow molded product 20, the second mold member 253 may be moved in a direction to separate the hollow molded product 20 from the first bottom wall surface portion 251Aa. To realize this, the second mold member 253 is provided so as to be movable in a direction of pressing the hollow molded product molded in the cavity. In this way, the hollow molded product 20 can be surely abutted against the abutting portion 13 of the suction portion 10. Also, without moving the second mold member 253, a jet port 255a that is exposed in the recess 254 and jets a pressurized gas into the recess 254 may be provided.

[0021] The present invention can also be understood as a method for manufacturing a hollow molded product by blow molding using a molding machine having a mold device 114 in which the hollow molded product is blow molded in a cavity (221, 241, 251), and a molded product take-out machine 120 that sucks the hollow molded product 20 molded in the mold device with a suction part 10 and carries it out of the mold device. In this method, first, as the mold device 114, a first mold member 252 having a first bottom wall surface portion 251Aa of the bottom wall surface 251A of the cavity 251 and a second mold member 253 provided adjacent to the first mold member 252 and having a second bottom wall surface portion 251Ab of the bottom wall surface of the cavity are prepared. Next, when the first bottom wall surface portion 251Aa of the first mold member 252 and the second bottom wall surface portion 251Ab of the second mold member 253 are in a closed state, they constitute the bottom wall surface of the cavity. Then, after the hollow molded product 20 is molded, the hollow molded product 20 is adsorbed and held with respect to the first bottom wall surface portion 251Aa of the first mold member 252.

[0022] Also, in a molded product take-out method for carrying a molded product formed by blow molding out of the mold device of a molding machine, first, a pressurized gas is ejected into the molded product held by the mold device. Next, the mold device is opened in a state where the pressurized gas is ejected. Subsequently, a closed space 26 communicating with the inside of the hollow molded product is formed in a state where the mold device is opened. Then, after the closed space is formed, the inside of the closed space is depressurized. In this molded product take-out method, for example, when a pressurized gas is ejected into a hollow molded product molded in a blow mold, the hollow molded product is in a state of being pressed against the blow mold. In this state, when the blow mold other than the mold portion corresponding to the bottom of the hollow molded product is opened, the bottom of the hollow molded product is held in a state of being pressed against the mold portion corresponding to the bottom. When the inside of the closed space communicating with the inside of the molded product is depressurized in this state, the hollow molded product can be held by the molded product take-out machine 120. Therefore, even for a hollow molded product having no portion protruding from the blow mold, the molded product can be carried out of the blow mold without touching the opening or inner surface of the hollow molded product 20.

Advantages of the Invention

[0023] According to the present invention, even for a hollow molded article having no protruding portion from the blow mold, the hollow molded article can be carried out of the blow mold without touching the opening or the inner surface of the hollow molded article.

Brief Description of the Drawings

[0024] Blow pin integrated rod It is a perspective view schematically showing an example of a molding system according to an embodiment of the present invention. Blow pin integrated rod (A) is a side view schematically showing an open mold state of a mold device included in a molding system according to an embodiment of the present invention, and (B) is a side view schematically showing a mold clamping state of the mold device included in the molding system according to an embodiment of the present invention. Blow pin integrated rod (A) is a perspective view schematically showing an example of a suction part of a molded product take-out machine included in a molding system according to an embodiment of the present invention, (B) is a front view schematically showing the suction part, and (C) is a cross-sectional view schematically showing the suction part. Blow pin integrated rod (A) is a front view schematically showing a state where the suction part shown in FIG. 3 holds a molded product, and (B) is a cross-sectional view schematically showing the suction part. Blow pin integrated rod (A) to (D) are diagrams schematically showing an example of a process in which the suction part shown in FIG. 3 holds a molded product. Blow pin integrated rod (A) is a front view schematically showing another example of a suction part of a molded product take-out machine included in a molding system according to an embodiment of the present invention, and (B) is a cross-sectional view schematically showing the suction part. Blow pin integrated rod (A) to (D) are diagrams schematically showing another example of a process in which the suction part shown in FIG. 3 holds a hollow molded product. Blow pin integrated rod (A) to (D) are diagrams schematically showing another example of a process in which the suction part shown in FIG. 3 holds a hollow molded product. Blow pin integrated rod It is a diagram schematically showing a modification example of a mold device included in a molding system according to an embodiment of the present invention.

Embodiments for Carrying Out the Invention

[0025] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following embodiments, the present invention is embodied in a molding system including a molding machine equipped with a mold device that performs injection molding of a preform and blow molding of a molded product in parallel, and a so-called traverse type molded product take-out machine.

[0026] FIG. 1 is a schematic perspective view of the molding system according to the present embodiment. FIGS. 2(A) and 2(B) are side views schematically showing the mold device included in the molding system. FIG. 2(A) corresponds to the mold open state, and FIG. 2(B) corresponds to the mold closed state. In FIG. 1, the description of the support frame and the intermediate mold shown in FIGS. 2(A) and 2(B) is omitted.

[0027] (Molding operation) As shown in FIG. 1, the molding system 100 includes a molding machine 110 and a molded product take-out machine 120 that carries out the molded product molded in the molding machine 110. Although not particularly limited, the mold device 114 included in the molding machine 110 includes a cavity 211 that functions as an injection mold and a cavity 221 that functions as a blow mold. A bottomed parison, which is a preform 19, is injection molded in the cavity 211 that functions as an injection mold. The preform 19 is moved to the cavity 221 that functions as a blow mold, and a desired hollow molded product corresponding to the blow mold is blow molded in the cavity 221.

[0028] The molding machine 110 has a known structure (for example, Japanese Patent Application Laid-Open No. 2018-167453, etc.), and the fixed platen 111 and the movable platen 112 are arranged in a facing state. The movable platen 112 is slidably supported by tie bars 113 arranged along the horizontal direction from the four corners of the fixed platen 111. The movable platen 112 is driven by a mold clamping device 115 to move along the tie bars 113, and by this drive, the mold clamping and mold opening of the mold device 114 including the fixed mold 201 attached to the fixed platen 111 and the movable mold 202 attached to the movable platen 112 are performed.

[0029] The molded product take-out machine 120 includes a mounting base 121, a traversing frame 122, a first traveling body 123, a pulling-out frame 124, a second traveling body 125, a head 126, and a lifting arm 127. The traversing frame 122 extends in the direction of carrying the molded product produced by the molding machine 110 out of the molding machine. The molded product take-out machine 120 is attached to the molding machine 110 by fixing the base end portion of the traversing frame 122 to the mounting base 121 installed on the fixed platen 111.

[0030] The first traveling body 123 is supported by the traversing frame 122 and moves forward and backward along the traversing frame 122 with a servo motor as the driving source. The pulling-out frame 124 has its base end portion fixed to the first traveling body 123 and is arranged to extend in the opening and closing direction of the mold device 114. The second traveling body 125 is supported by the pulling-out frame 124 and moves forward and backward along the pulling-out frame 124 with a servo motor as the driving source. The head 126 is supported at the lower end of the lifting arm 127. The lifting arm 127 is arranged to extend in the vertical direction and moves up and down in the vertical direction with a servo motor provided in the second traveling body 125 as the driving source. As the lifting arm 127 moves in the vertical direction, the head 126 moves up and down in the vertical direction. The head 126 is provided with one or a plurality of suction portions 10 (detailed below) arranged at positions corresponding to the molded product forming position of the movable mold 202.

[0031] As shown in FIGS. 2(A) and 2(B), the mold device 114 included in the molding machine 110 of the present embodiment includes a fixed mold 201, a movable mold 202, and an intermediate mold 203. As shown in FIG. 2(A), the intermediate mold 203 has a rectangular parallelepiped shape including two main surfaces 231 and 232 that are arranged to face the fixed mold 201 and the movable mold 202, respectively. The intermediate mold 203 is supported by a support frame 117 provided between the fixed platen 111 and the movable platen 112. The support frame 117 is provided on the tie bar 113 so as to be movable in the moving direction of the movable platen 112 (the direction in which the tie bar 113 extends). The support frame 117 is driven independently of the movable platen 112 by a driving device (not shown). Further, the intermediate mold 203 includes a rotation axis 235 that is horizontally arranged at an intermediate position in the vertical direction and is orthogonal to the moving direction of the movable platen 112, and the rotation axis 235 is rotatably supported by the support frame 117. Then, by rotationally driving the rotation axis 235 using a servo motor included in the support frame 117 as a driving source, a state in which one main surface 231 of the intermediate mold 203 faces the fixed mold 201 and the other main surface 232 faces the movable mold 202, and a state in which one main surface 231 faces the movable mold 202 and the other main surface 232 faces the fixed mold 201 are realized. That is, by rotationally driving the intermediate mold 203 by 180 degrees, the combination of the molds arranged to face each other can be changed. In FIGS. 2(A) and 2(B), for the sake of explanation, the outer shape of the intermediate mold 203 existing behind the support frame 117 is shown by a broken line.

[0032] Also, as shown by the dashed lines in FIGS. 2(A) and 2(B), on the surface of the fixed mold 201 facing the intermediate mold 203, a plurality of elongated injection molding cavities 211 having hemispherical bottoms are provided. The fixed mold 201 equipped with the injection molding cavities 211 functions as an injection mold as described later. For example, when adopting an arrangement of 2 rows in the horizontal direction and 3 rows in the vertical direction, a total of 6 injection molding cavities 211 are provided in the fixed mold 201. Further, on one main surface 231 of the intermediate mold 203, blow pins-cum-rods 233 are respectively provided at positions corresponding to the injection molding cavities 211 in a state of being arranged opposite to the fixed mold 201. Similarly, on the other main surface 232 of the intermediate mold 203, Blow pin integrated rod 234 are respectively provided at positions corresponding to the injection molding cavities 211 in a state of being arranged opposite to the fixed mold 201.

[0033] Also, as shown by the dashed lines in FIGS. 2(A) and 2(B), on the surface of the movable mold 202 facing the intermediate mold 203, a plurality of blow molding cavities 221 are respectively provided at positions corresponding to the blow pins-cum-rods 233 and 234 of the intermediate mold 203. In the case of the above example, 6 blow molding cavities 221 are provided in the movable mold 202. The inner surface of the blow molding cavity 221 has a shape corresponding to the outer surface of the above-mentioned hollow molded product, and the movable mold 202 equipped with the blow molding cavity 221 functions as a blow mold as described later.

[0034] As shown in FIG. 2(B), when the mold device 114 is in the mold-clamped state with the main surface 231 of the intermediate mold 203 facing the fixed mold 201, the 233 of the main surface 231 of the intermediate mold 203 is inserted into the injection molding cavity 211 of the fixed mold 201, Blow pin integrated rod and Blow pin integrated rodThe preform cavity corresponding to the shape of the above-described preform (bottomed parison) is formed by 233 and the cavity 211 for injection molding. The preform 19 is formed by injecting the resin heated and melted from the injection device 116 connected to the fixed platen 111 into this preform cavity. When the mold device 114 is in the mold open state, the preform 19 Blow pin integrated rod is carried out of the cavity 211 for injection molding while being held by 233 ( Blow pin integrated rod in a state of covering 233) (see Fig. 2(A)). When the intermediate mold 203 is rotationally driven by 180 degrees, the Blow pin integrated rod 234 that holds the preform 19 is arranged in a state of facing each of the blow molding cavities 221 of the movable mold 202.

[0035] Also, when the main surface 231 is in the mold clamped state facing the fixed mold 201, the other main surface 232 of the intermediate mold 203 that holds the preform 19 in the blow molding cavity 221 of the movable mold 202 Part 21 234 is inserted. In this case, since the injection molding of the preform 19 has been performed using suction 234 in advance, Air flow path 234 is in a state of holding the preform 19. In this state, Member 234 functions as a blow pin, Member and the hollow molded product 20 having an outer surface corresponding to the shape of the cavity 221 is blow molded by blowing blow air (pressurized gas) from 234 into the preform 19. Also, at this time, the molded product is in a state of being separated from Contact surface (inclined surface of contact part) 234 by the blow air. In Figs. 2(A) and 2(B), the hollow molded product 20 blow molded in the cavity 221 is shown by a dashed line for explanation.

[0036] As described above, in the molding machine 110 according to the present embodiment, under the situation where the mold device 114 is in the mold clamped state, the injection molding of the preform 19 on the fixed mold 201 side of the intermediate mold 203 and the blow molding of the desired hollow molded product 20 on the movable mold 202 side of the intermediate mold 203 are carried out in parallel.

[0037] On the one hand, when the mold device 114 is in the mold-open state, the fixed mold 201 and the movable mold 202 are separated, and the support frame 117 is arranged in a state of being separated from the fixed mold 201 and the movable mold 202 with the intermediate mold 203. At this time, as described above, on the main surface of the intermediate mold 203 on the fixed mold 201 side ​ 233 holds the preform 19, and the preform 19 held on the main surface of the intermediate mold 203 on the movable mold 202 side ​ has been detached from 234 as a result of blow molding. ​ has detached from 234.

[0038] Also, as will be described in detail below, with the mold device 114 in the mold-open state, the head 126 of the above-described molded product take-out machine 120 is inserted into the space between the movable mold 202 and the intermediate mold 203, and the hollow molded product 20 held in the cavity 221 of the movable mold 202 is carried out.

[0039] After the hollow molded product in the cavity 221 is carried out, the intermediate mold 203 is rotated 180 degrees, and then the mold device 114 is brought into the mold-closing state, and injection molding of the preform 19 and blow molding of the hollow molded product 20 are carried out again.

[0040] (Carrying out the hollow molded product) Subsequently, the taking out of the hollow molded product in the cavity 221 will be described. In the above-described example, a plurality of hollow molded products are formed at once by blow molding, and the plurality of hollow molded products are taken out at once by the molded product take-out machine 120. In the present embodiment, since there is no difference in the configuration for taking out the plurality of hollow molded products formed in each cavity 221, hereinafter, an example of carrying out one hollow molded product from one cavity 221 that forms one hollow molded product will be described as a representative.

[0041] FIG. 3(A) is a perspective view schematically showing an example of the suction part 10 provided in the head 126 of the molded product take-out machine 120 according to an embodiment of the present invention. FIG. 3(B) is a front view schematically showing the suction part 10. FIG. 3(C) is a cross-sectional view schematically showing the suction part 10. Further, FIG. 4(A) is a front view schematically showing a state where the suction part 10 shown in FIGS. 3(A) to 3(C) holds the hollow molded product 20. FIG 4 (B) is a cross-sectional view schematically showing a state where the suction part 10 holds the hollow molded product 20. The hollow molded product 20 of the present embodiment is a bottomed cylindrical beverage container, and an opening that serves as a drinking mouth ​ It includes a main body part 23 composed of a cylinder having the same diameter and a shoulder part 22 that smoothly connects between the opening part 21. Since the opening part 21 is configured to be sealed by heat sealing, the hollow molded product 20 does not have a flange part (cap screwing part) as used by the conventional molded product take-out machine for holding the molded product. The opening part 21 is formed at the time of injection molding of the above-mentioned bottomed parison, which is the preform 19, as a thick part whose entire circumference is thicker than the wall thickness of other parts of the hollow molded product 20.

[0042] As shown in FIGS. 3(A) to 3(C), each of the plurality of suction parts 10 provided in the head 126 of the molded product take-out machine 120 has a structure in which an insert part 12 and a contact part 13 are formed on a columnar base plate 11. The insert part 12 has a columnar shape that is concentric with the center line of the base plate 11 and extends along the virtual center line of the base plate 11. As shown in FIG. 4(B), the diameter of the cross section of the insert part 12 is smaller than the diameter of the opening part 21 of the hollow molded product 20 to be conveyed. The opening part 21 is an outlet for a blow pin that is inserted into the hollow molded product 20 to blow-mold the hollow molded product 20 in the blow mold, and the insert part 12 is inserted into the hollow molded product 20 through the opening part 21.

[0043] Further, as shown in FIGS. 3(A) to 3(C), the insert portion 12 is provided with a plurality of suction ports 12b at the tip for sucking the surrounding atmosphere. Although not particularly limited, in the present embodiment, the insert portion 12 is provided with one suction port 12b at the center of the tip 12a and four suction ports 12b that open at equal intervals on the outer peripheral surface near the tip 12a. Each suction port 12b is connected to an air flow path 12c disposed inside the insert portion 12, and the other end of the air flow path 12c is connected to a pipe connection portion 15 that protrudes from the outer peripheral surface of the base plate 11. A vacuum pump or a vacuum generator (ejector) is connected to the pipe connection portion 15 via, for example, an on-off valve or the like. By switching the opening and closing of the on-off valve and the supply and non-supply of pressurized gas to the vacuum generator, the suction on and off (suction state and non-suction state) at the plurality of suction ports 12b can be switched. Note that the non-suction state includes pressure increase as will be described later.

[0044] As shown in FIGS. 3(A) to 3(C), the contact portion 13 has a cylindrical shape extending along the virtual center line of the base plate 11 so as to be concentric with the virtual center line of the base plate 11. The axial length of the contact portion 13 is smaller than the axial length of the insert portion 12. Although not particularly limited, in the present embodiment, the outer diameter of the base plate 11 and the outer diameter of the contact portion 13 are the same, and the outer peripheral surface of the base plate 11 and the outer peripheral surface of the contact portion 13 constitute a continuous outer peripheral surface.

[0045] An annular recess 14 is provided between the insert portion 12 and the contact portion 13. The annular recess 14 accommodates the opening 21 of the hollow molded product 20 to be carried out. In a state where the opening 21 of the hollow molded product 20 to be carried out is accommodated in the annular recess 14, the annular contact surface 13b of the cylindrical contact portion 13 contacts continuously with the outer peripheral surface of the hollow molded product 20 at a predetermined distance from the opening 21 of the hollow molded product 20. In the present embodiment, as shown in FIGS. 4(A) and 4(B), the contact portion 13 contacts the outer peripheral surface constituted by the shoulder portion 22.

[0046] In this state, the annular recess 14 forms a closed space 26 that communicates with the internal space 24 of the hollow molded product 20. The closed space 26 does not necessarily have to be a completely sealed closed space, and it may be a space in which the inside of the hollow molded product 20 can be depressurized by suction through the suction port 12b of the insert portion 12. That is, if the inside of the hollow molded product 20 can be depressurized by suction through the suction port 12b of the insert portion 12, for example, a configuration in which there is a gap between the outer peripheral surface of the hollow molded product 20 and the contact surface 13b of the contact portion 13, or a configuration in which through holes, openings, etc. are present in the cylindrical surface constituting the contact surface 13b of the contact portion 13 may be adopted.

[0047] In the present embodiment, as shown in FIGS. 4(A) and 4(B), an inclined surface that aligns with the shoulder portion 22 of the hollow molded product 20 constitutes the contact surface 13b. The contact surface 13b formed of the inclined surface is provided with a predetermined width at the inner peripheral edge of the contact portion 13. Thereby, the contact area between the contact portion 13, the outer peripheral surface of the shoulder portion 22, and the contact surface 13b formed of the inclined surface can be increased, and the closed space 26 can be easily formed.

[0048] Further, the contact portion 13 is provided with additional suction ports 13c for sucking the outer peripheral surface of the hollow molded product 20 on the inclined surface that is the contact surface 13b with the hollow molded product 20. Although not particularly limited, in the present embodiment, it is provided with six additional suction ports 13c arranged at equal intervals on the inclined surface that is the contact surface 13b. Each suction port 13c is connected to an air flow path 13d arranged inside the contact portion 13, and the other end of the air flow path 13d is connected to the air flow path 12c. Therefore, the on and off of suction (suction state and non-suction state) at the additional suction ports 13c of the contact portion 13 are switched in synchronization with the on and off of suction at the suction port 12b of the insert portion 12.

[0049] Subsequently, the procedure for the above-described suction portion 10 to hold the hollow molded product 20 will be described. FIGS. 5(A) to 5(D) are diagrams schematically showing the process of the above-described suction portion 10 holding the hollow molded product 20.

[0050] FIG. 5(A) is a view showing a state in which after the preform 19 [FIG. 2(A)] is formed into a shape corresponding to the cavity 221 of the movable mold 202, which is a blow mold, by blow air, the blow pin-cum-rod 233 or 234 that has ejected the blow air is withdrawn from the opening 21 of the hollow molded article 20, which is the blow pin outlet.

[0051] As shown in FIG. 5(A), in the present embodiment, the movable mold 202 is divided into two parts by a vertical plane including the virtual center line of the main body portion 23 of the hollow molded article 20. Further, when the movable mold 202 is in the split mold open state, an interval is configured such that the hollow molded article 20 can be carried out without interfering with the movable mold 202 in the vertical direction or the direction in which the virtual center line of the main body portion 23 extends. In the cavity 221 of the movable mold 202 in the split mold closed state, a concave portion that matches the above-mentioned thick portion constituting the opening 21 is provided at a position corresponding to the opening 21 of the hollow molded article 20. Therefore, when the preform 19 is disposed in the cavity 221 of the movable mold 202, the entire preform 19 is accommodated in the movable mold 202, and the preform 19 (and the hollow molded article 20) does not have a portion protruding outside the movable mold 202.

[0052] With respect to the hollow molded article 20 in this state, the suction portion 10 is disposed in a state where the opening 21 and the insert portion 12 face each other, and as shown in FIG. 5(B), the insert portion 12 is inserted into the hollow molded article 20 through the opening 21. Although not particularly limited, in the present embodiment, since the hollow molded article 20 is disposed in a state where the virtual center line of the main body portion 23 is horizontal, the insert portion 12 is inserted into the hollow molded article 20 by horizontal movement. Further, although not particularly limited, in the present embodiment, at this time, the length of the insert portion 12 in the virtual center line direction is designed such that the tip 12a of the insert portion 12 is disposed in the vicinity of the switching portion between the shoulder portion 22 and the main body portion 23 in the direction in which the virtual center line of the hollow molded article 20 extends.

[0053] Then, in this state, a plurality of suction ports 12b of the insert portion 12 and a plurality of additional suction ports 13c of the contact portion 13 are switched from a non-suction state to a suction state. As a result, the ambient atmosphere is sucked from the plurality of suction ports 12b of the insert portion 12, and an air flow is generated that flows from the outside to the inside of the hollow molded product 20 through the opening 21.

[0054] In this state, as shown in FIG. 5(C), the movable mold 202 is in a split mold open state. Due to the opening of the split mold, the hollow molded product 20 moves to the proximal end side (base plate 11 side) of the insert portion 12 due to the air flow flowing in from the opening 21. Due to the movement of the hollow molded product 20, as shown in FIG. 5(D), the opening 21 of the hollow molded product 20 is received in the recess 14, and the shoulder portion 22 of the hollow molded product 20 abuts against the inclined surface that is the contact surface 13b of the contact portion 13. As a result, a series of hollow spaces are formed by the recess 14 and the internal space of the hollow molded product 20. Further, in the process of this movement, the air flow caused by the suction by the suction port 13c of the contact portion 13 promotes the movement of the opening 21 to the recess 14, and the suction by the suction port 13c maintains the state in which the shoulder portion 22 abuts against the contact surface 13b. And since the suction of the ambient atmosphere from the suction port 12b of the insert portion 12 continues even in this state, the shoulder portion 22 of the hollow molded product 20 is pressed against the contact surface 13b, and the shoulder portion 22 of the hollow molded product 20 is reliably supported by the contact portion 13.

[0055] In this way, the adsorption portion 10 holding the hollow molded product 20 can be moved vertically upward by the molded product take-out machine 120, and the hollow molded product 20 can be carried out of the movable mold 202.

[0056] As described above, in the molding system 100 (molded product take-out machine 120) including the suction part 10 of the present embodiment, even for the hollow molded product 20 that does not have a part protruding from the movable mold 202, the hollow molded product 20 can be carried out from the movable mold 202 without touching the opening 21 or the inner surface of the hollow molded product 20. Therefore, even for a hollow molded product to which thin-wall weight reduction, material change to a biodegradable resin, or the like is applied, the hollow molded product can be carried out from the blow mold while avoiding damage to the hollow molded product and contamination of the opening.

[0057] In addition, in the above-described embodiment, as a particularly preferable form, a configuration in which the contact surface 13b constituting the inclined surface is provided with an additional suction port 13c is adopted, but it is not essential to provide the additional suction port 13c. When suction of the ambient atmosphere is continued from the plurality of suction ports 12b in a state where a series of closed spaces 26 are formed by the concave portion 14 and the internal space of the hollow molded product 20, the shoulder portion 22 of the hollow molded product 20 is pressed against the contact surface 13b constituting the inclined surface of the contact portion 13. Therefore, even in a configuration without the additional suction port 13c, the shoulder portion 22 of the hollow molded product 20 is supported by the contact portion 13. In this case, it is not essential to provide the contact surface 13b formed of an inclined surface on the inner peripheral edge of the contact portion 13, and the inner peripheral edge of the contact portion 13 may be formed of a corner portion or a curved surface.

[0058] Further, in the above-described embodiment, a configuration in which the on and off of suction at the suction port 12b and the additional suction port 13c are switched synchronously and simultaneously has been described, but it is also possible to adopt a configuration in which a vacuum system for switching the on and off of suction at the suction port 12b and a vacuum system for switching the on and off of suction at the additional suction port 13c are provided independently.

[0059] Furthermore, in the above-described embodiment, a configuration in which a vacuum system for applying a suction force to the suction port 12b and the additional suction port 13c is connected to the piping connection part 15 has been described. For example, an ejector is provided on the base plate 11, and a pressurized gas is supplied to the ejector using a compressor or the like to reduce the pressure in the air flow path 12c connected to the intake port of the ejector. It is also possible to adopt such a configuration.

[0060] Next, based on FIGS. 6(A) and 6(B), another suction portion 40 provided in the molded product take-out machine according to the present invention will be described. FIG. 6(A) is a front view schematically showing the suction portion 40. Further, FIG. 6(B) is a cross-sectional view schematically showing the suction portion 40. The suction portion 40 shown in FIGS. 6(A) and 6(B) is different only in the configuration of the contact portion 13 from the suction portion 10 described with reference to FIGS. 3(A) to 3(C). Since other configurations are the same, the same reference numerals as those in FIGS. 3(A) to 3(C) are given to the same elements. Note that the suction portion 40 is used in place of the above-described suction portion 10 in the molding system 100.

[0061] The suction portion 40 is different from the above-described suction portion 10 in that an elastic body 13e is provided in a portion having a predetermined length from the tip 13a of the contact portion 13 having a contact surface that contacts the hollow molded product 20. The material of the elastic body 13e is not particularly limited, and for example, rubber materials such as silicone rubber, nitrile rubber, and urethane rubber can be used. In the suction portion 40, since the elastic body 13e constitutes the entire tip 13a of the contact portion 13, it is also different in that it does not include the contact surface 13b formed of the inclined surface, the additional suction port 13c, and the air flow path 13d provided in the above-described suction portion 10.

[0062] In this suction portion 40, when the contact portion 13 contacts the outer peripheral surface of the shoulder portion 22 of the hollow molded product 20, the shape of the elastic body 13e serving as the contact surface deforms into a state that conforms to the outer peripheral surface of the shoulder portion 22. As a result, since the contact area between the shoulder portion 22 of the hollow molded product 20 and the elastic body 13e constituting the contact surface of the contact portion 13 increases, the shoulder portion 22 of the hollow molded product 20 can be more reliably supported by the contact portion 13.

[0063] In the example shown in FIG. 6, the case where the surface shape of the elastic body 13e is flat has been described. However, the surface shape of the elastic body 13e can adopt any other shape such as a curved surface. Also, in the example shown in FIG. 6, the contact surface 13b composed of an inclined surface, the additional suction port 13c, and the air flow path 13d are not provided. However, even in the contact portion 13 provided with the elastic body 13e, it is also possible to provide the contact surface 13b composed of an inclined surface, the additional suction port 13c, and the air flow path 13d. Further, in the example shown in FIG. 6, only the tip portion of the contact portion 13 is composed of an elastic body. However, the entire contact portion 13 or the entire adsorption portion 40 may be composed of an elastic body.

[0064] Subsequently, based on FIGS. 7(A) to 7(D), another procedure for the above-described adsorption portion 10 to hold the hollow molded product 20 will be described. In order to realize this procedure, unlike the above-described procedure, the suction port 12b of the insert portion 12 of the adsorption portion 10 needs to function as a jet port for jetting a pressurized gas. Therefore, in this example, a vacuum system that applies a suction force to the suction port 12b and a gas supply system that supplies a pressurized gas to the suction port 12b are switchably connected to the pipe connection portion 15 of the adsorption portion 10.

[0065] Such a configuration can be realized, for example, by using a vacuum pump for the vacuum system, using a compressor for the gas supply system, and connecting each system and the pipe connection portion 15 via a three-way valve or the like. However, as a simpler configuration, it is preferable to adopt a configuration in which an ejector and a compressor are used, and the state where the vacuum port of the ejector is connected to the pipe connection portion 15 and the state where the output port of the compressor is connected to the pipe connection portion 15 can be switched by an electromagnetic valve or the like. With this configuration, by supplying a pressurized gas from the compressor to the ejector, it can function as a vacuum system, and the compressor can function as a gas supply system.

[0066] FIG. 7(A) is a view showing a state in which, after the preform is formed into a shape corresponding to the cavity 241 of the movable mold 204 by blow air, the blow pin (the above-described blow pin and rod 233 or 234) that has ejected the blow air is withdrawn from the opening 21 of the hollow molded product 20 that is the blow pin outlet. Note that the movable mold 204 is used in place of the above-described movable mold 202 in the molding system 100.

[0067] As shown in FIG. 7(A), in this case, unlike the above-described movable mold 202, the movable mold 204 is configured such that the mold portion 242 corresponding to the bottom of the hollow molded product 20 does not move in the split mold open state. The movable mold 204 other than the mold portion 242 is split into two in a vertical plane including the virtual center line of the main body portion 23 of the hollow molded product 20, similarly to the movable mold 202, and is capable of split mold opening and closing operations. Similar to the movable mold 202, in the split mold open state, an interval is configured such that the hollow molded product 20 can be carried out without interfering with the movable mold 204 in the vertical direction or the direction in which the virtual center line of the main body portion 23 extends.

[0068] With respect to the hollow molded product 20 in such a state, the suction portion 10 is disposed in a state where the opening 21 and the insert portion 12 face each other, and as shown in FIG. 7(B), the insert portion 12 is inserted into the hollow molded product 20 through the opening 21. Then, the state is switched to a state in which pressurized gas is ejected from the suction port 12b of the insert portion 12 and the additional suction port 13c of the contact portion 13. That is, when the suction port 13c is switched to an injection port, the hollow molded product 20 is pressed against the movable mold 204.

[0069] In this state, when the movable mold 204 other than the mold portion 242 corresponding to the bottom of the hollow molded product 20 is brought into the split mold open state, as shown in FIG. 7(C), the hollow molded product 20 is held in a state where the bottom of the hollow molded product 20 is pressed against the mold portion 242 corresponding to the bottom.

[0070] In this state, the suction port 12b of the insert portion 12 and the additional suction port 13c of the contact portion 13 are switched to the suction state. As a result, the ambient atmosphere is sucked from the suction port 12b of the insert portion 12, and an air flow is generated that flows from the outside to the inside of the hollow molded product 20 through the opening 21. Then, due to the air flow flowing in from the opening 21, the hollow molded product 20 moves toward the proximal end side of the insert portion 12. Due to the movement of the hollow molded product 20, as shown in FIG. 7(D), the opening 21 of the hollow molded product 20 is accommodated in the concave portion 14, and the shoulder portion 22 of the hollow molded product 20 abuts against the contact surface 13b formed by the inclined surface of the contact portion 13. As a result, similar to the case shown in FIG. 5(D), the shoulder portion 22 of the hollow molded product 20 is reliably supported by the contact portion 13. Also, when switching the suction port 12b of the insert portion 12 and the additional suction port 13c of the contact portion 13 to the suction state, the adsorption portion 10 may be moved in the direction of the hollow molded product 20 to bring the contact surface 13b formed by the inclined surface closer to the shoulder portion 22, and further, the contact surface 13b formed by the inclined surface may be brought into contact with the shoulder portion 22. ​ When switching the suction port 13c of the additional suction port to the suction state, by moving the adsorption portion 10 in the direction of the hollow molded product 20, the contact surface 13b formed by the inclined surface may be brought closer to the shoulder portion 22, and further, the contact surface 13b formed by the inclined surface may be brought into contact with the shoulder portion 22.

[0071] In this way, the molding product take-out machine 120 moves the adsorption portion 10 holding the hollow molded product 20 vertically upward, so that the hollow molded product 20 can be carried out from the movable mold 204. Also by this procedure, similar to the above-described procedure, even for a hollow molded product 20 having no portion protruding from the movable mold 204, the hollow molded product 20 can be carried out from the movable mold 204 without touching the opening 21 or the inner surface of the hollow molded product 20. Therefore, even for a molded product to which thin-wall weight reduction, material change to a biodegradable resin, etc. are applied, the molded product can be carried out from the blow mold while avoiding damage to the molded product and contamination of the opening.

[0072] Also, in the configuration described above, the additional suction port 13c can also be used as a jet outlet for jetting a pressurized gas. Therefore, for example, when detaching the taken-out hollow molded product 20 from the molding product take-out machine 120, it is also possible to more reliably detach the hollow molded product 20 by jetting a pressurized gas from the suction port 13c serving as the jet outlet of the contact portion 13.

[0073] In addition, in the configuration described above, as a particularly preferred form, in the insert portion 12, the suction port 12b also serves as an ejection port for ejecting the pressurized gas. However, it is also possible to adopt a configuration in which the insert portion 12 is provided with an ejection port provided independently of the suction port 12b. Similarly, in the contact portion 13, the suction port 13c also serves as an ejection port for ejecting the pressurized gas. However, it is also possible to adopt a configuration in which the contact portion 13 is provided with an ejection port provided independently of the suction port 13c.

[0074] Furthermore, in the configuration described above, it is not essential for the contact portion 13 to be provided with both a suction port and an ejection port, and it is also possible to adopt a configuration in which it is provided with neither one or both of them.

[0075] In addition, in this case, the configuration in which the ejector is arranged outside the suction portion 10 has been described. For example, the ejector is provided on the base plate 11, and by supplying pressurized gas to the intake port of the ejector using a compressor or the like, the air flow path 12c connected to the intake port of the ejector is depressurized. At the same time, in a state where pressurized gas is supplied to the ejector using a compressor or the like, by closing the exhaust port of the ejector, ​ it is also possible to adopt a configuration in which pressurized gas is supplied into the 12c connected to the intake port of the ejector.

[0076] Subsequently, based on FIGS. 8(A) to 8(D), another procedure in which the above-described suction portion 10 holds the hollow molded product 20 will be described. In this procedure, unlike the procedure shown in FIG. 7, the mold device (blow mold) in which the molded product is blow molded holds the hollow molded product 20 in the split mold open state.

[0077] FIG. 8(A) shows a state in which after the preform is formed into a shape corresponding to the cavity 251 of the movable mold 205 by blow air, the blow pin (the above-described blow pin-cum-rod 233 or 234) that has ejected the blow air is withdrawn from the opening 21 of the hollow molded product 20 that is the blow pin extraction port. Note that the movable mold 205 is used in place of the above-described movable mold 202 in the molding system 100.

[0078] As shown in FIG. 8(A), in this case, the movable mold 205 that forms part of the mold device 114, similar to the above-described movable mold 204, has a mold portion on the bottom side of the hollow molded product 20 that is not divided by a vertical plane including the virtual center line of the main body portion 23 of the hollow molded product 20. However, in the movable mold 205, unlike the movable mold 204, the mold portion on the bottom side of the hollow molded product 20 is composed of a plurality of mold members 252 and 253. That is, it is composed of a first mold member 252 that forms a cavity portion in contact with the peripheral edge of the bottom of the hollow molded product 20 and a second mold member 253 that forms a cavity portion in contact with the central portion of the bottom of the hollow molded product 20. Although not particularly limited, the second mold member 253 is a columnar member concentric with the virtual center line of the main body portion 23 of the hollow molded product 20 and is configured to be movable back and forth in the axial direction by a drive source such as a hydraulic cylinder (not shown). In addition, the movable mold 205 other than the first mold member 252 and the second mold member 253 is divided into two parts by a vertical plane including the virtual center line of the main body portion 23 of the hollow molded product 20, similar to the movable mold 202, and is capable of performing a split mold opening and closing operation. Similar to the movable mold 202, when in the split mold open state, the hollow molded product 20 can be carried out without interference with the movable mold 205 and a space is configured such that it can be carried out without interference with the movable mold

[0079] More specifically, the first mold member 252 has a first bottom wall surface portion 251Aa of the bottom wall surface 251A of the cavity 251 as a cavity forming surface, and the second mold member 253 is provided adjacent to the first mold member 252 and has a second bottom wall surface portion 251Ab of the bottom wall surface 251A of the cavity 251 as a cavity forming surface. The first bottom wall surface portion 251Aa of the first mold member 252 and the second bottom wall surface portion 251Ab of the second mold member 253 form the bottom wall surface 251A of the cavity 251 when in the closed mold state. And after the hollow molded product 20 is molded, the mold device 114 adsorbs and holds the hollow molded product against the first bottom wall surface portion 251Aa of the first mold member 252.

[0080] The suction holding operation will be described. With respect to the hollow molded product 20, as shown in FIG. 8(B), the second mold member 253 is moved in a direction away from the hollow molded product 20, and the configuration surfaces of the cavity 251 of the first mold member 252 and the cavity of the second mold member 253 are arranged in a configuration different from the split mold closed state (closed mold state). Thereby, a recess 254 having the first mold member 252 as a wall surface is formed. That is, after the hollow molded product is molded, the second mold member 253 is moved so as to form a recess 254 between the second bottom wall surface portion 251Ab of the second mold member 253 and the outer surface of the hollow molded product. Further, due to the movement of the second mold member 253, the suction port 255a provided on the wall surface of the recess 254 formed by the first mold member 252 is exposed. The suction port 255a is connected to an air flow path 255 provided inside the first mold member 252, and the other end of the air flow path 255 is connected to a vacuum pump or a vacuum generator via an on-off valve or the like. By switching the opening and closing of the on-off valve and the supply / non-supply of pressurized gas to the vacuum generator, the on and off of suction (suction state and non-suction state) at the suction port 255a can be switched. Also, although not particularly limited, in this example, the suction port 255a also functions as a jet port for jetting pressurized gas. Therefore, a vacuum system for applying a suction force to the suction port 255a and a gas supply system for supplying pressurized gas to the suction port 255a are switchably connected to the other end of the air flow path 255.

[0081] When the suction port 255a is exposed in the recess 254 due to the movement of the second mold member 253, the suction port 255a is switched to the suction state. As a result, the hollow molded product 20 is adsorbed and held in a state where the peripheral edge portion of the bottom surface abuts against the first mold member 252. That is, the mold device 114 can be in a suction holding state in which the hollow molded product is adsorbed and held on the first bottom wall surface portion 251Aa of the first mold member 252 by depressurizing the inside of the recess 254. In the above configuration, since the hollow molded product is adsorbed and held by the mold device, even if the mold device is opened in a split mold state to carry out the molded product, the molded product is held by the mold device. Therefore, the outer peripheral surface of the hollow molded product can be surely brought into contact with the contact portion 13, and the hollow molded product can be carried out more easily. Therefore, the suction portion 10 is disposed in a state where the opening 21 and the insert portion 12 face each other, and as shown in FIG. 8(B), the insert portion 12 is inserted into the hollow molded product 20 through the opening 21.

[0082] In this state, the first mold ​ 252 and the second mold ​ Even if the movable mold 205 other than 253 is opened in a split mold state, as shown in FIG. 8(C), the hollow molded product 20 is adsorbed and held in a state where the peripheral edge portion of the bottom surface of the hollow molded product 20 abuts against the first mold member 252.

[0083] In this state, the suction port 12b of the insert portion 12 and the suction port 13c of the contact portion 13 are switched to the suction state. As a result, the ambient atmosphere is sucked from the suction port 12b of the insert portion 12, and an air flow is generated that flows from the outside to the inside of the hollow molded product 20 through the opening 21. At this time, by setting the inside of the recess 254 to a non-reduced pressure state, the hollow molded product is configured to be in a non-adsorption holding state where it is not adsorbed and held on the first bottom wall surface portion 251Aa of the first mold member 252. In the present embodiment, the suction port 255a exposed in the recess 254 is switched to a state where pressurized gas is ejected. As a result, the adsorption holding of the bottom portion of the hollow molded product 20 is released, and due to the pressurized gas ejected from the suction port 255a and the air flow flowing in from the opening 21, the hollow molded product 20 moves toward the proximal end side of the insert portion 12. Due to the movement of the hollow molded product 20, as shown in FIG. 8(D), the opening 21 of the hollow molded product 20 is accommodated in the recess 14, and the shoulder portion 22 of the hollow molded product 20 abuts against the contact surface 13b formed by the inclined surface of the contact portion 13. As a result, similar to the case shown in FIG. 5(D), the shoulder portion 22 of the hollow molded product 20 is reliably supported by the contact portion 13. In this case, since the hollow molded product 20 is adsorbed and held by the first mold member 252, when the movable mold 205 is in the mold-opening state, the adsorption portion 10 can be moved in the direction of the hollow molded product 20 to bring the contact surface 13b closer to the shoulder portion 22, and further, the contact surface 13b can be brought into contact with the outer peripheral surface constituting the shoulder portion 22.

[0084] In this way, the molding product take-out machine 120 moves the adsorption portion 10 holding the hollow molded product 20 vertically upward, so that the hollow molded product 20 can be removed from the movable mold 205 This procedure also allows the hollow molded product 20 having no protruding portion from the movable mold 205 to be removed from the movable mold 205 without touching the opening 21 or the inner surface of the hollow molded product 20. Therefore, even for a hollow molded product to which thin-wall weight reduction, material change to a biodegradable resin, etc. are applied, the molded product can be removed from the blow mold while avoiding damage to the molded product and contamination of the opening.

[0085] In the configuration described above, as a particularly preferred form, the suction port 255a also serves as a jet outlet for ejecting pressurized gas. However, it is also possible to adopt a configuration in which the recess 254 is provided with a jet outlet that is independent of the suction port 255a. Further, from the viewpoint of assisting the detachment of the hollow molded article 20 held by suction, instead of the jet outlet for ejecting pressurized gas, as shown in FIG. 9, the second mold member 253 may be provided so as to be movable in the direction of pressing the hollow molded article 20. In addition, it is not essential to provide a configuration for assisting the detachment of the hollow molded article 20 held by suction in this way, and it is also possible to simply adopt a configuration for switching the suction port 255a to a non-suction state.

[0086] In the configuration described above, from the viewpoint of preventing the hollow molded article 20 from falling, as shown in FIG. 8(B), the insert portion 12 is inserted into the hollow molded article 20 when the split mold is in the closed state. However, after the split mold is opened, a configuration in which the insert portion 12 is inserted into the hollow molded article 20 may also be adopted.

[0087] In the configuration described above, as a particularly preferred form, the second mold member 253 is configured to be driven. However, it is sufficient that the first mold member 252 and the second mold member 253 are relatively movable. Further, it is not essential to provide the suction port 255a. For example, if the cavity configuration surface of the first mold member surrounds the periphery of the cavity configuration surface of the second mold member, the suction force for the molded article can be generated by arranging the cavity configuration surface of the first mold member and the cavity configuration surface of the second mold member in a different configuration from the closed state. A configuration in which the molded article is held by suction with the suction force may also be adopted. Further, the portion of the molded article to be held by suction is not limited to the bottom, and other portions may be held by suction.

[0088] As described above, according to the present invention, even for a molded article having no portion protruding from the blow mold, the molded article can be carried out of the blow mold without touching the opening or the inner surface.

[0089] Note that the above-described embodiments do not limit the technical scope of the present invention, and various modifications and applications are possible within the scope of the present invention other than those already described. For example, the components of each case described above can be combined arbitrarily as appropriate.

[0090] Also, the number, shape, and arrangement position of the suction ports and the number, shape, and arrangement position of the ejection ports in the suction part described above are merely examples and can be changed as appropriate. Similarly, the number, shape, and arrangement position of the concave and convex parts in the mold device described above are merely examples and can be changed as appropriate. Furthermore, the physical shape and material of each of the above-described elements can be arbitrarily changed within the range in which the effects of the present invention are achieved.

Industrial Applicability

[0091] According to the present invention, even for a molded product that does not have a portion protruding from the blow mold, the molded product can be carried out of the blow mold without touching the opening or the inner surface, and it is useful as a molding system, a molded product take-out machine, a molded product take-out method, a mold device, a molding machine, and a driving method for the mold device.

Explanation of Signs

[0092] 10, 40 Suction part 11 Base plate 12 Insert part 12b Suction port (ejection port) 12c Air flow path 13 Contact part 13b ​ 13c Suction port (ejection port) 13d Air flow path 13e Elastic body 14 Concave part 15 Pipe connection part 20 Hollow molded product 21 Opening (blow pin extraction port) 22 Shoulder (outer peripheral surface) 23 Body part 100 Molding system 110 Molding machine 114 Mold device 120 Molded product take-out machine 202, 204, 205 Movable mold (blow mold) 221, 241, 251 Blow molding cavity 252 First mold member 253 Second mold member 254 Recess 255a Suction port (jet outlet)

Claims

1. A molding system for manufacturing a hollow molded product by blow molding, comprising: a molding machine having a mold device in which the hollow molded product is blow molded in a cavity; a molded product take-out machine that adsorbs the hollow molded product molded in the mold device with an adsorption part and carries it out from the mold device; The adsorption part of the molded product take-out machine includes: an insert part inserted into the hollow molded product through a blow pin outlet of the hollow molded product; a contact part that is arranged at an interval from the insert part and contacts a portion of the outer peripheral surface of the hollow molded product that is a predetermined distance away from the blow pin outlet; a recess provided between the insert part and the contact part, and when a portion where the blow pin outlet of the hollow molded product is formed is accommodated with the contact part contacting the outer peripheral surface of the hollow molded product, a closed space communicating with the internal space of the hollow molded product is formed; a suction port provided in the insert part for sucking air in the internal space and the closed space; The mold device includes: a first mold member having a first bottom wall surface portion of the bottom wall surface of the cavity; a second mold member provided adjacent to the first mold member and having a second bottom wall surface portion of the bottom wall surface of the cavity; The first bottom wall surface portion of the first mold member and the second bottom wall surface portion of the second mold member constitute the bottom wall surface of the cavity when in a closed state; A molding system, characterized in that after the hollow molded product is molded, it is configured to adsorb and hold the hollow molded product against the first bottom wall surface portion of the first mold member.

2. The mold device is configured such that: after the hollow molded product is molded, the second mold member is moved to form a recess between the second bottom wall surface portion of the second mold member and the outer surface of the hollow molded product; by depressurizing the inside of the recess, an adsorption holding state is achieved in which the hollow molded product is adsorbed and held against the first bottom wall surface portion of the first mold member; The molding system according to claim 1, wherein by making the inside of the recess in a non-depressurized state, a non-adsorption holding state is achieved in which the hollow molded product is not adsorbed and held against the first bottom wall surface portion of the first mold member.

3. The adsorption holding state is obtained by making the inside of the recess in a suction state; The molding system according to claim 2, wherein the non-adsorption holding state is obtained by making the inside of the recess in a non-suction state or in a pressurized state.

4. The mold device includes a plurality of mold members that form walls of the cavity other than the bottom wall surface, and after the plurality of mold members are separated from the hollow molded product, the second mold member moves so as to move the hollow molded product in a direction away from the first bottom wall surface portion. The molding system according to claim 1.

5. A molding system for manufacturing a hollow molded product by blow molding, comprising a molding machine having a mold device in which the hollow molded product is blow molded, and a molded product take-out machine that adsorbs the hollow molded product molded in the mold device with an adsorption portion and carries it out of the mold device, wherein the adsorption portion of the molded product take-out machine includes an insert portion inserted into the hollow molded product through a blow pin outlet of the hollow molded product, a contact portion that is arranged at an interval from the insert portion and contacts a portion of the outer peripheral surface of the hollow molded product that is a predetermined distance away from the blow pin outlet, and a recess that is provided between the insert portion and the contact portion and forms a closed space communicating with the internal space of the hollow molded product when a portion where the blow pin outlet of the hollow molded product is formed while the contact portion contacts the outer peripheral surface of the hollow molded product is accommodated, and the insert portion is provided with a suction port for sucking air in the internal space and the closed space. A molding system characterized by this.

6. The adsorption portion includes a connecting portion that connects the insert portion and the contact portion and forms the recess between the insert portion and the contact portion, an additional suction port for sucking the outer peripheral surface of the hollow molded product is provided on a contact surface of the contact portion with the hollow molded product, and an air flow path communicating with the suction port and the additional suction port is formed inside the insert portion, the connecting portion, and the contact portion. The molding system according to claim 5.

7. The molding system according to claim 5, wherein the suction port and the additional suction port of the insert portion are also used as jet ports for jetting pressurized gas.

8. A mold device used in a molding system that adsorbs a hollow molded product molded from the mold device of a molding machine having a mold device in which the hollow molded product is blow molded into a cavity with an adsorption portion of a molded product take-out machine, comprising a first mold member that constitutes a part of the cavity, and a second mold member that is provided adjacent to the first mold member and constitutes a part of the cavity. A mold device used in a molding system in which the forming surface of the cavity of the first mold member and the forming surface of the cavity of the second mold member are arranged in a manner different from the closed state, and the hollow molded product formed in the cavity is adsorbed and held in a state of abutting against the forming surface of the cavity of the first mold member.

9. The first mold member is a first mold member having a first bottom wall surface portion of the bottom wall surface of the cavity as the forming surface of the cavity, The second mold member is a second mold member having a second bottom wall surface portion of the bottom wall surface of the cavity as the forming surface of the cavity, The first bottom wall surface portion of the first mold member and the second bottom wall surface portion of the second mold member constitute the bottom wall surface of the cavity when in the closed state, The mold device used in the molding system according to claim 8, wherein after the hollow molded product is molded, the hollow molded product is configured to be adsorbed and held with respect to the first bottom wall surface portion of the first mold member.

10. After the hollow molded product is molded, the second mold member is moved so as to form a recess between the second bottom wall surface portion of the second mold member and the outer surface of the hollow molded product, By reducing the pressure in the recess, the hollow molded product is configured to be in an adsorption holding state in which it is adsorbed and held on the first bottom wall surface portion of the first mold member, The mold device used in the molding system according to claim 9, wherein by making the inside of the recess in a non-reduced pressure state, the hollow molded product is configured to be in a non-adsorption holding state in which it is not adsorbed and held on the first bottom wall surface portion of the first mold member.

11. The adsorption holding state is obtained by making the inside of the recess in a suction state, The non-adsorption holding state is obtained by making the inside of the recess in a non-suction state or in a pressurized state in the molding system according to claim 10.

12. It includes a plurality of mold members that form the walls of the cavity other than the bottom wall surface of the cavity, The mold device used in the molding system according to claim 11, wherein after the plurality of mold members are separated from the hollow molded product, the suction state is maintained for a predetermined period.

13. The mold device used in the molding system according to claim 11, comprising a suction port that is exposed in the recess and sucks the atmosphere in the recess.

14. The mold device used in the molding system according to claim 8, wherein the second mold member is provided so as to be movable in a direction in which the hollow molded product molded in the cavity is pressed.

15. The mold device used in the molding system according to claim 11, further comprising a jet outlet that is exposed in the recess and ejects a pressurized gas into the recess.

16. A molded product take-out machine that adsorbs a hollow molded product by blow molding with a suction part and carries it out from the mold device of a molding machine, wherein the suction part an insert part inserted into the hollow molded product through a blow pin extraction port of the hollow molded product; a contact part arranged at an interval from the insert part and contacting a portion of the outer peripheral surface of the hollow molded product that is a predetermined distance away from the blow pin extraction port; a recess provided between the insert part and the contact part, and when the portion where the blow pin extraction port of the hollow molded product is formed with the contact part contacting the outer peripheral surface of the hollow molded product is accommodated, a closed space communicating with the internal space of the hollow molded product is formed; A molded product take-out machine provided with a suction port provided in the insert part for sucking air in the internal space and the closed space.

17. The molded product take-out machine according to claim 16, wherein the contact part is provided with an additional suction port for sucking the outer peripheral surface of the hollow molded product on the contact surface with the hollow molded product.

18. The molded product take-out machine according to claim 16, wherein the contact part is provided with an elastic body on the contact surface with the hollow molded product.

19. A molding machine having a mold device in which a hollow molded product is blow molded in a cavity, A method for manufacturing a hollow molded product by blow molding using a molded product take-out machine that adsorbs the hollow molded product molded in the mold device with a suction part and carries it out from the mold device, As the mold device, a step of preparing a first mold member having a first bottom wall surface portion of the bottom wall surface of the cavity and a second mold member provided adjacent to the first mold member and having a second bottom wall surface portion of the bottom wall surface of the cavity; A step of forming the bottom wall surface of the cavity when the first bottom wall surface portion of the first mold member and the second bottom wall surface portion of the second mold member are in a closed mold state; A method for manufacturing a hollow molded product by blow molding, characterized by including a step of adsorbing and holding the hollow molded product with respect to the first bottom wall surface portion of the first mold member after the hollow molded product is molded.