JPH08207128A - Method and apparatus for molding bent container - Google Patents

Abstract

PURPOSE: To mold a lightweight bent container by using necessary min. amt. of a resin so as to not only to reduce the deflection of a parison but also to stably obtain constant wall thickness. CONSTITUTION: A container having a bent part formed to a part thereof is molded by a blow molding method using a mold divided into split molds. A parison 2 is suspended in the cavity 22 having the outer shape of the container to be molded and having a mouth part 26 formed thereto along a vertical direction to be downward inclined from a bent position formed between the split molds at the position of the mouth part 26 and the lower part of the parison is inserted in the gap between the front and rear supports 38, 40 provided to a moving member 36 at the lower position of the mouth part and, after the parison is arranged in the cavity by moving the moving member to the position of the bottom part 25 of the cavity, the mold is clamped to blow a pressure fluid into the parison from the mouth part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for molding a container containing a liquid detergent or the like having a bent neck and a molding apparatus used for the molding.

[0002]

2. Description of the Related Art A container containing a detergent or a liquid of various chemicals is provided with a sintered polymer or the like at its mouth, and the container is turned upside down to allow the content liquid to bleed into the sintered polymer or the like, thereby directly containing the content liquid. What has been applied to a specific portion of the laundry has been conventionally used. At that time, in order to improve the convenience of use, a container having a bent neck portion has been used. The container as described above is generally manufactured by a blow molding method using a resin such as polyethylene or polypropylene, for reasons such as simplicity and low cost.

A method of manufacturing a container having a bent neck portion is disclosed in, for example, Japanese Patent Laid-Open No. 51-73068. As shown in FIG. 16, the manufacturing method is as follows.
The neck forming dies 3a, 3 which are rotatable with respect to the die body 1
When the mold is opened, the neck molds 3a, 3b are pulled out from the mold main body 1 forward. When the mold is closed, first, the neck molds 3a, 3b are formed.
The parison 2 is hung so that b is parallel to the mold body 1, and the parison 2 is formed into the cavity 5 formed inside the mold body 1.
Pull out below. Then, as shown in FIG.
Before the mold body 1 is completely closed, the neck molds 3a and 3b are tilted at a predetermined angle, and pressurized fluid is blown from the blow nozzle 4 so that the parison 2 follows the shape of the cavity 5 of the mold. After molding and after a certain cooling time, the mold is opened and the molded product is taken out.

Further, in this molding apparatus, when the neck molds 3a, 3b are inclined, the lower part of the parison 2 is prevented from being unnecessarily biased and the parison 2 is prevented from swinging.
A single guide rod 6 is fixedly provided on the lower part of the mold body 1 and is in contact with only one side of the lower end of the parison.

[0005]

However, with the above manufacturing method, burrs are still liable to occur on the inside A of the bent portion of the container, and due to the inclination of the neck forming dies 3a and 3b, the parison on the outside B of the bent portion is not easily formed. It easily shakes, and it is difficult to keep the thickness of the molded container constant. Also, since the neck mold is tilted, the blow nozzle cannot be inserted straight from above, and even if the blow nozzle is inserted diagonally, the parison at the neck is tilted and hangs down by its own weight. Direct blow cannot be performed and post-treatment of the mouth of the container is required after molding. Therefore, there are restrictions on the shape of the container to which the above manufacturing method is applied. Also,
With the above molding apparatus, the mold is divided into upper and lower parts, and one of the molds, that is, the neck forming molds 3a and 3b is rotated, so that the mold structure is complicated and the equipment cost is greatly increased. Will be accompanied.

Another manufacturing apparatus for a container with a bent neck is also shown in Japanese Utility Model Laid-Open No. 53-130275. This device is shown in FIGS. 18 and 19, and in the middle of mold closing, the end portion of the piston rod of the air cylinder 11 is pivotally attached, and one end of the first arm 12 is pivotally attached to the device body. And a second arm fixed to the other end of the first arm 12 at a right angle.
The arm 13 is interlocked with the operation of the split mold, and only the rear part of the lower portion of the hanging tubular parison 2 is pushed by the hooking plate 14 attached to the end of the second arm 13 so that the cavity 1
After being bent substantially along the center line of 0, the mold is completely closed and air is blown through the blowing nozzle 4.

However, with this device, in particular,
The runout is large in the front part C at the lower part of the parison 2, and the rear part near the center of the parison 2 is likely to hang down due to the weight of the parison 2, which makes it difficult to control the wall thickness.
Further, when the parison 2 is continuously extruded, the suspended parison 2 is directly bent, so that the resin stays thick especially in the rear part B of the bent portion and becomes thick, and the hardening may start first. Yes Defects are likely to occur. Therefore, although these problems are dealt with by designing a thick wall as a whole, the consumption of the resin and the weight increase more than necessary.

Further, the publication discloses a construction in which a knob cam for grasping the lower part of the parison is provided in place of the hooking plate 14. With this product, the entire lower part of the parison 2 is wrapped and supported, so the runout of the lower part of the parison 2 is suppressed, but in order to prevent the parison from sagging due to its own weight, it is necessary to perform the blow molding before performing the molding. Since the air is blown into the parison 2, the parison is likely to protrude from the cavity and burrs are likely to occur. Also,
Since the mechanism for wrapping the parison 2 is provided at the end of the first arm, the device becomes complicated.

The present invention has been made in order to solve the above-mentioned problems, and it reduces the deflection of the parison so that a certain thickness can be stably produced, and uses the minimum necessary amount of resin. It is an object of the present invention to provide a method for molding a lightweight bent container and an apparatus therefor.

[0010]

According to a first aspect of the present invention, there is provided a molding method in which a parison is hung between split molds into which a mold is divided, and a container having a bent portion is molded by a blow molding method. With the outer shape of, the mouth part is along the vertical direction,
Between the split mold, in which a cavity is formed in which the lower part is inclined forward from the bent position, the parison is hung at the position of the mouth part, and the front support provided on the moving body is provided at the position below the mouth part. Insert the lower part of the parison between the body and the posterior support,
The moving body is moved to a position corresponding to the bottom of the cavity to place the parison in the cavity, and then the split mold is closed to blow the pressurized fluid into the parison from the mouth.

According to a second aspect of the present invention, there is provided a molding device comprising a mold which is a pair of split molds in which a cavity having a bent container shape is formed, and a pressurized fluid is blown into the cavity from an opening formed in the mold. A moving nozzle that moves the lower part of the parison to a position corresponding to the bottom of the cavity by the blow-in nozzle and the front and rear supports arranged in the front and rear parts of the parison hanging between the split molds at the mouth position. It is characterized by having and.

According to a third aspect of the present invention, there is provided a method for molding a bent container, wherein a parison is hung between split molds, and a container having a bent portion is molded by a blow molding method. So, while the mouth is along the vertical direction, while the parison is hung at the position of the mouth between the split mold in which the cavity in which the lower part is inclined forward from the bent position is formed,
At the position below the mouth, grab the front part of the lower part of the parison, move it to the position corresponding to the bottom of the cavity and place the parison in the cavity, then close the split mold and put it in the parison from the mouth. It is characterized by blowing a pressurized fluid.

According to a fourth aspect of the present invention, there is provided a molding apparatus comprising a mold which is a pair of split molds in which a cavity having a bent container shape is formed, and a pressurized fluid is blown into the cavity from an opening formed in the mold. A blow-in nozzle for charging and a gripping body for grabbing the front part of the parison hanging between the split molds at the position of the mouth part and moving the lower part of the parison to a position corresponding to the bottom part of the cavity to place the parison in the cavity. It is characterized by having.

[0014]

According to the method of claim 1 or the device of claim 2, the parison suspended from the mouth in the vertical direction,
The parison is placed below the mouth by inserting the space between the anterior support and the posterior support to ensure reliable support and moving the moving body provided with the anterior support and the posterior support. It is placed in a cavity formed at a location other than the above, and thereafter, the lower part of the parison is molded by being blown with pressurized fluid while being supported by the anterior and posterior supports. There is no flash on the inside.
In addition, since the lower part of the parison is also supported in the front-back direction by the anterior support and the posterior support, the runout is small especially at the lower part of the parison, and also near the center of the parison. The sagging due to its own weight is small, and it is easy to control the wall thickness. As described above, even if the continuous molding is performed, it is possible to prevent the inappropriate thinness of the bottle by eliminating the shake of the position in front of bending the parison. And continuous molding is also possible, resin does not stay,
There is no appearance defect.

Therefore, since it is possible to mold with a constant wall thickness, it is possible to design the wall thickness to be thin, and it is possible to reduce the weight of the container. Moreover, since the consumption of resin can be reduced, the cost can be reduced. Further, according to the present invention, since the moving body is moved to move the lower part of the parison to a position corresponding to the bottom of the cavity to place the parison at a proper position in the cavity, the neck of the container is not tilted. Since the blowing nozzle can be easily inserted and the neck portion of the parison hangs in the vertical direction, direct blowing is possible, and post-processing and the like can be reduced. Further, since the forming die itself does not rotate, the degree of complication of the die structure is small.

In the method according to claim 3 or the device according to claim 4, only the front part of the lower part of the parison which is vertically suspended from the mouth part is sandwiched by the gripping body and reliably supported. The parison is placed in the cavity formed at a position other than below the mouth by moving the moving body with the holding body, and then the lower part of the parison is supported by the holding body. Since a pressurized fluid is blown in while being molded, burrs do not occur inside the bent portion as in the case of the above-described invention of claim 1 or 2. Also, since the lower part of the parison is securely supported by the gripping body, the runout is small especially at the lower part of the parison, and the sagging due to the weight of the parison is small even in the vicinity of the center of the parison, and the wall thickness can be controlled. It's easy. In this way, by reducing the deflection of the position in front of the parison, it is possible to prevent the bottle from becoming thin. And continuous molding is also possible, resin does not stay,
There is no appearance defect.

Therefore, since it is possible to mold the container with a constant wall thickness, it is possible to design the wall thickness to be thin and to reduce the weight of the container. Moreover, since the consumption of resin can be reduced, the cost can be reduced. Further, according to the present invention, the grasping body is moved to a position corresponding to the bottom of the cavity to position the parison at a proper position in the cavity, and the neck of the container is not tilted. It is easy, and since the neck of the parison hangs in the vertical direction, direct blowing is possible and post-processing etc. can be reduced.
Further, since the forming die itself does not rotate, the degree of complication of the die structure is small.

[0018]

Embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited thereto.

[Embodiment 1] FIG. 1 shows a molding apparatus of Embodiment 1. The molding die 20 shown in FIG. 1 is made of a material used in a general blow molding apparatus, and has a cavity 22 having the shape of the outer shape of a container having a bent portion in a part to be molded therein. In the present invention, the inside A of the bent portion is
Is referred to as a front portion (left side in FIG. 1), and the outer side B is referred to as a rear portion (right side in FIG. 1). In the example shown in FIG. 1, the portion 26 corresponding to the mouth of the container of the cavity is threaded. The mold 20 comprises a mold body 23 and a head block 21 movable with respect to the mold body 23. The mold body 23 is fixed to the substrate 18, and the head block 21 is omitted in FIG. The head moving mechanism protrudes inward from the mold main body 23 with a predetermined size, and closes the mold main body 23 before the mold clamping when the mold is clamped.

An expansion / contraction mechanism 30 is arranged below the mold body 23. In this embodiment, the expansion / contraction mechanism is roughly configured by including an air cylinder 32 and a piston rod 34 that reciprocates by the air cylinder 32. A moving body 36 is provided at the end of each piston rod 34. The moving body 36 preferably has low thermal conductivity, and bakelite or the like is suitable. In the first embodiment, the expansion mechanism 30 and the moving body 36 are provided one for each split mold of the molding die. Further, rod-shaped support bodies 38 and 40 are vertically provided on the moving body 36. In the example shown in FIG. 1, one support is provided for each of the two moving bodies,
It is provided toward the other moving body, and one support is a front support 38 and the other support is a rear support 40.

When the piston rod 34 of the expansion / contraction mechanism 30 contracts, the moving body 36 is positioned below the mouth 28 of the cavity, and the cylindrical shape is hung between the split molds through the mouth 28. The distance between the anterior support 38 and the posterior support 40 is set so that the parison is inserted between the anterior support 38 and the posterior support 40. Then, in the present embodiment, the moving body is moved from the lower side of the mouth portion 28 to the front side and the upper side (upper left side in FIG. 1B) by the expansion / contraction mechanism 30, and corresponds to the bottom portion 25 of the container of the cavity 22. Move to the position you want.

Although not shown in FIG. 1, an extruder for continuously extruding the parison 2 or a blowing nozzle for blowing a pressurized fluid such as air into the parison arranged in the cavity from the mouth portion. It goes without saying that the apparatus required for general blow molding is attached.

A molding method using the molding apparatus will be described with reference to FIGS. First, as shown in FIG. 2, the parison 2 is hung from above with the split molds 23a and 23b of the mold body 23 open. At this time, the moving body 36 is positioned below the hanging parison 2. Then, as shown in FIG. 3, the hanging parison 2 is inserted between the front support 38 and the rear support 40 of the moving body 36, and at the same time, both split molds are placed on the split molds 23a and 23b. The head blocks 21a and 21b provided so as to project inward of the mold are closed before the mold main body 23 by the first-stage mold clamping, and the mouth portion 2 is closed.
8 is formed. In this embodiment, the head moving mechanism 27 is composed of an elastic member such as a spring, and the length of the head moving mechanism 27 is shortened by the subsequent die clamping of the die main body 23. Further, as the head moving mechanism 27, in addition to the elastic member, a mechanism such as a cylinder having a piston rod that expands and contracts can be applied.

Next, as shown in FIG. 4, the expansion / contraction mechanism 30 moves the moving body 36 to a position corresponding to the bottom portion 25 of the cavity 22 to place the parison 2 in the cavity 22. During this time, the parison 2 continues to hang down from the mouth 28 into the mold. The moving speed of the moving body 36 is set in consideration of the hanging speed of the parison 2 and the like. After that, as shown in FIG. 5B, the molding die is closed by the second stage mold clamping, the parison 2 is cut at the upper part of the mouth portion 28 by the cutter 44, and then the mold is placed at the blowing position on the molding line. By moving, as shown in FIG. 6, the blowing nozzle 42 is inserted into the mouth portion 28, and pressurized air is blown into the parison 2. At this time, by screwing into the mouth of the molding die, the screw can be formed in the mouth of the container simultaneously with the blow molding of the container. Then, after a lapse of a predetermined cooling time, the molding die is opened as shown in FIG. 7, and the molded container is taken out.

According to the molding method of this embodiment, a container having a bent portion can be molded easily and easily by using the blow molding method, and at the same time, the front part and the rear part of the lower part of the parison are supported together. Since the blow molding is performed by moving the parison, the swing of the parison can be suppressed and the wall thickness can be kept constant. In addition, since the parison is not slanted by tilting the mouth, direct blow is also possible,
It is possible to eliminate the need for post-treatment of the mouth of the container. Therefore, the restrictions from the shape are small and the versatility is high. Further, since the mold itself does not have a revolving portion, it is possible to prevent the mold structure from becoming complicated.

Further, in this embodiment, split molds 23a and 23b are used.
The front support 38 is provided on one of the moving bodies provided in each of the above, and the rear support 40 is provided on each of the other moving bodies, but the present invention is not limited to this. The movable body is provided with both the front support 38 and the rear support 40, and as a whole, two front supports and two rear supports are provided.
It is possible to provide a structure in which a total of four supports are provided. With the configuration in which the front support 38 and the rear support 40 are respectively provided to these two moving bodies, fine adjustment of each support becomes easy when the diameter of the parison is changed. Further, the moving body 36 and the expansion / contraction mechanism 30 may be provided only on one split mold, and the one moving body 36 may be provided with both the front support 38 and the rear support 40. With this configuration, since the number of the expansion / contraction mechanism 30 is one, it is possible to further reduce the size, weight and simplification of the device.

Further, in the molding machine shown in FIGS. 16 and 17, although the guide rod 6 is provided, it is fixed to the lower part of the mold body and hits the parison 2 after air is blown. Since it is in contact with the parison 2, the swing of the parison 2 could not be effectively suppressed, and it was difficult to control the wall thickness. However, the molding machine of the present embodiment, the parison 2 before the air is blown. Is regulated by the front support 38, the swing of the parison 2 can be appropriately suppressed, and the control of the wall thickness of the container can be further improved.

Test Example 1 The molding machine of Example 1 described above and the molding machine of the above-described molding machine in which the front support was removed and the parison was pushed only by the rear support to guide the bending. The molded containers were molded, and the quality of molded products was comparatively evaluated. As a result, the container molded by the molding machine of the present example had a wall thickness as designed in all parts of the container and was free of flash. On the other hand, in a container formed by inducing the parison only at the rear part of the parison, the parison has a large swing, it is difficult to control the wall thickness, the appearance is poor, and a relatively large amount of flash is generated. Therefore, it is clear that the molded product of this embodiment is superior to the molded product of the molding apparatus shown in FIGS.

[Embodiment 2] The molding apparatus of Embodiment 2 is shown in FIG.
As shown in FIG. 4, the molding apparatus according to the first embodiment is different in the position where the expansion and contraction mechanism 30 is provided. That is, in the molding apparatus shown in FIG. 8, the expansion / contraction mechanism 30 is located in front of the cavity 22, and when the piston rod 34 extends, the moving body 36 is located below the mouth portion 28 and moves when contracted. The body 36 is arranged at a position corresponding to the bottom of the cavity 22. Even with the molding apparatus of this configuration, when the parison is hung in the molding die, the moving body 36 is located below the mouth portion and the parison stays on the moving body 36 as in the molding apparatus of the first embodiment. It is inserted between the provided front support 38 and rear support 40, and then the piston rod 34 of the expansion mechanism 30 contracts, whereby the moving body 36 moves and the parison is placed in the cavity 22. , Molded.
Even the molding apparatus having this configuration can achieve the same effects as those of the molding apparatus of the first embodiment.

[Third Embodiment] In the third embodiment, as compared with the first embodiment, instead of the anterior support or the posterior support in the moving body,
A gripping body is provided. That is,
As shown in FIG. 9, the piston rod 34 of the extension / contraction mechanism 30.
A holding body 48 is provided on the moving body 46 provided at the end of the. The gripping body 48 provided on the moving body 46 provided in each split mold is roughly configured by a gripping expansion / contraction mechanism 50 and a gripping member 54, and expands and contracts by the gripping air cylinder 50. The gripping member 54 provided at the end of 52 is opposed to the other gripping member and repeats the reciprocating motion so as to narrow or widen the interval. In the molding apparatus of this example, when the piston rod 34 of the expansion / contraction mechanism 30 contracts, the moving body 46 is located below the mouth 28,
The holding member 54 is positioned on the side of the front portion of the parison 2 that is suspended from the mouth portion 28.

In the example shown in FIG. 9, a roller 56 is formed below the cavity 22 of the molding die, and the moving body 46 moves on the roller 56.

A molding method using this molding apparatus is shown in FIGS.
This will be described with reference to 15. First, as shown in FIG.
The parison 2 is hung from above with the split molds 23a and 23b of the molding dies open. At this time, the moving body 46 is positioned below the hanging parison 2. Then, as shown in FIG. 11, the head blocks 21a and 21b provided so as to project inward on the split molds 23a and 23b are closed by the first stage mold clamping to form the mouth 28, and both sides of the parison 2 are formed. Only the lower front part of the parison 2 is sandwiched and gripped by the gripping member 54 of the gripping body 46 provided on the moving body 46 arranged at.

Next, as shown in FIG. 12, the expansion / contraction mechanism 30.
The moving body 46 is moved to a position corresponding to the bottom portion 25 of the cavity 22 by, and the parison 2 is arranged in the cavity 22. During this time, the parison 2 continues to hang down from the mouth 28 into the mold. The moving speed of the moving body 46 is set in consideration of the drooping speed of the parison 2. After that, as shown in FIG. 13B, the molding die is closed by the second stage mold clamping, the parison 2 is cut by the cutter 44 at the upper portion of the mouth portion 28, and the mold is moved to the blowing position.
As shown in FIG. 14, a blowing nozzle 42 is inserted into the mouth 28, and pressurized air is blown into the parison 2. Then, after a lapse of a predetermined cooling time, the molding die is opened as shown in FIG. 15, and the molded container is taken out.

Even in the molding method of this embodiment, as in the case of Embodiment 1, the blow molding method can be used to easily and easily mold a container having a bent portion, and the front part of the lower part of the parison is formed. Since the blow molding is performed by grasping and moving the portion, it is possible to suppress the deflection of the parison and to keep the wall thickness constant. Further, since the parison at the mouth is not slanted and droops, direct blowing is also possible, and post-treatment of the mouth of the container is unnecessary.
Therefore, the restrictions from the shape are small and the versatility is high. Further, since the mold itself does not have a revolving portion, it is possible to prevent the mold structure from becoming complicated. Further, in the third embodiment, since the roller 56 that restricts the movement of the moving body 46 is formed, the swinging of the moving body 46 is suppressed, and the parison 2 is guided more accurately. It should be noted that the swing of the moving body 46 can be reduced by making the piston rod 34 of the expansion / contraction mechanism 30 a square rod, and the roller 56 is not always necessary.

[Test Example 2] A bent container is molded by the molding machine of Example 3 described above and the molding machine for guiding the parison by wrapping and gripping the lower part of the parison described in the section of the conventional example. , The quality of the molded products was compared and evaluated. As a result, the container molded by the molding machine of the present example had a wall thickness as designed in all parts of the container and was free of flash. On the other hand, a container formed by guiding the parison by grasping the entire lower part of the parison may cause burrs, and it is difficult to control the wall thickness, and the appearance is not good.

[0036]

According to the molding method and the molding apparatus of the present invention, since burrs are not generated and the lower part of the parison is supported, the runout is small even at the lower part of the parison, and the center of the parison is small. Even in the vicinity, the sagging due to the weight of the parison is small, and it is easy to control the wall thickness. Further, the resin is less likely to stay even if it is carried out by continuous molding, and the appearance defect can be reduced. Therefore, since it is possible to mold with a constant wall thickness, it is possible to design the wall thickness to be thin, and it is possible to reduce the weight of the container. Moreover, since the consumption of resin can be reduced, the cost can be reduced. Further, according to the present invention, direct blow is possible, and post-processing and the like can be reduced. Further, since the forming die itself does not rotate, the degree of complication of the die structure is small.

[Brief description of drawings]

1A and 1B show the molding apparatus of Example 1 divided into halves, FIG. 1A being a plan view, FIG. 1B being a longitudinal sectional view, and FIG.
FIG. 1C is a diagram showing a main part viewed from the arrow c side of FIG.

2 shows one step in Example 1, and FIG.
FIG. 2B is a cross-sectional view of the bottom and FIG. 2B is a rear view.

FIG. 3 shows one step in Example 1, and FIG.
FIG. 3B is a sectional view of the bottom and FIG. 3B is a rear view.

FIG. 4 shows one step in Example 1, and FIG.
FIG. 4B is a cross sectional view and FIG. 4B is a rear view.

FIG. 5 shows one step in Example 1, and FIG.
FIG. 5B is a sectional view of the bottom and FIG. 5B is a rear view.

6 shows one step in Example 1, and FIG.
FIG. 6B is a sectional view of the bottom and FIG. 6B is a rear view.

7 shows one step in Example 1, and FIG. 7 (a)
FIG. 7B is a sectional view of the bottom and FIG. 7B is a rear view.

FIG. 8 is a vertical sectional view of a molding apparatus according to a second embodiment.

9A and 9B show the molding apparatus of Example 3 divided into halves, FIG. 9A being a plan view, FIG. 9B being a longitudinal sectional view, and FIG.
FIG. 9C is a diagram showing a main part viewed from the arrow c side of FIG. 9B.

10 shows one step in Example 3, and FIG.
FIG. 10A is a vertical sectional view, and FIG. 10B is a rear view.

11 shows one step in Example 3, and FIG.
FIG. 11A is a vertical sectional view, and FIG. 11B is a rear view.

FIG. 12 shows one step in Example 3, and FIG.
FIG. 12A is a vertical sectional view, and FIG. 12B is a rear view.

13 shows one step in Example 3, and FIG.
FIG. 13A is a vertical sectional view, and FIG. 13B is a rear view.

14 shows one step in Example 3, and FIG.
FIG. 14A is a vertical sectional view, and FIG. 14B is a rear view.

15 shows one step in Example 3, and FIG.
FIG. 15A is a cross-sectional view of the bottom, and FIG. 15B is a rear view.

FIG. 16 is a vertical sectional view showing a molding method of a conventional example.

FIG. 17 is a vertical cross-sectional view showing the molding method of the conventional example.

FIG. 18 is a vertical cross-sectional view showing another conventional molding method.

FIG. 19 is a rear view showing the molding method of the conventional example.

[Explanation of symbols]

 2 Parison 20 Mold 22 Cavity 28 Mouth 30 Stretching Mechanism 36 Moving Body 38 Front Support 40 Back Support 46 Moving 48 Grasping 54 Grasping Member

Claims (4)

[Claims] 1. A method for molding a container having a bent portion by a blow molding method, in which a parison is hung between split molds into which the molding die is divided, and the outer shape of the container to be formed is such that the mouth is along the vertical direction. While the parison is hung at the position of the mouth between the split molds in which a cavity is formed in which the lower part is inclined forward from the bent position, the front part support provided on the moving body is provided at the position below the mouth part. Insert the lower part of the parison between the body and the posterior support, move the moving body to the position corresponding to the bottom of the cavity and place the parison in the cavity, then close the split mold and insert the parison into the parison from the mouth. A method for molding a bent container, characterized in that a pressurized fluid is blown into the container. 2. A molding die comprising a pair of split dies having a bent container-shaped cavity formed therein, a blowing nozzle for blowing a pressurized fluid into the cavity from a mouth portion formed in the molding die, and a mouth portion. At the position of the front part of the parison suspended between the split molds and the rear support to move the lower part of the parison to the position corresponding to the bottom of the cavity. Characteristic bending container forming device. 3. A method of molding a container having a bent portion by a blow molding method by hanging a parison between split molds of a mold, wherein the outer shape of the container to be formed is such that the mouth is along the vertical direction, Between the split mold in which the cavity whose lower part is inclined forward from the bent position is formed, while hanging the parison at the position of the mouth, at the position below the mouth, grasp the front part of the lower part of the parison, A method for molding a bent container, which comprises moving the parison into a position corresponding to the bottom of the cavity, placing the parison in the cavity, closing the split mold, and blowing a pressurized fluid into the parison from the mouth. 4. A molding die comprising a pair of split dies in which a curved container-shaped cavity is formed, a blowing nozzle for blowing a pressurized fluid into the cavity from a mouth formed in the molding die, and the mouth. It is characterized in that it has a grasping body for grabbing the front part of the parison hanging between the split molds at the position of the part and moving the lower part of the parison to the position corresponding to the bottom part of the cavity to place the parison in the cavity. Bending container molding device.