JPH08281788A - Method for preventing deformation of air blowing-in device and hook device - Google Patents

Abstract

PURPOSE: To provide a hook device in order to reduce the deformation of an air nozzle and the support member of a mold to reduce the shift of the joining surface of the air nozzle and the mold to constitute the same so as to be capable of easily adjusting a hook. CONSTITUTION: A horizontal key groove 5 and an inclined key groove 6 are formed in opposed relationship on the side of the joining surface of a lower hook 2 and a mold attaching plate 32 and a hook key 3 consisting of a horizontal key part and an inclined key part is fitted in both key grooves 5, 6 in a slidable manner and the inclined key part is fixed to the inclined key groove.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing deformation of an air blowing device and a hook device.

[0002]

2. Description of the Related Art First, a conventionally used blow molding machine will be described with reference to the drawings. 4 shows a conventional blow molding machine, FIG. 4 (a) is a front view thereof, and FIG. 4 (b) is FIG.
It is a side view of (a).

In the figure, the mold 30 is waiting at the air blowing position A in a state where the mold is opened by the mold clamping device 40. The molten resin supplied from the extrusion port of the extruder 20 to the crosshead 21 is hung downward and extruded as a cylindrical parison 22. The mold 30 is moved from the air blowing position A to the parison receiving position B by the mold transfer device 41.
Next, the mold clamping device 40 is operated, the mold mounting plates 31 and 32 supported by the tie bars 33 are moved to close the mold 30, and the parison 22 is held in the mold 30 and clamped. Done. Subsequently, the parison 22 is cut by the cutter 23. Next, the mold 30 is transferred to the mold transfer device 41.
It moves backward by and stops at the air blowing position A. Next, the air nozzle 51 of the air blowing device 50 descends, air is blown into the parison 22, and a resin container having a predetermined shape is molded as a molded product. After cooling, air blowing device 50
The air nozzle 51 rises, the mold is opened by the mold clamping device 40, the molded product falls into the molded product pool, and one cycle is completed.

The air blowing device 50 includes an air nozzle 51.
And a blowing cylinder 52 and the like, and is installed on a bracket 54 protruding from the frame 53. Below the air blowing device 50, the mold clamping device 40 and the mold transfer device 41.
Is installed.

[0005]

Since the conventional air blowing device is constructed as described above, it has the following problems. That is, to blow air into the parison,
Although it is necessary to press the air nozzle against the mold by the blowing cylinder, the reaction force of the pressing force is supported by the rigidity of the bracket and the frame supporting it. However, since the bracket and frame are cantilevered, the amount of deformation is large. Further, the pressing force against the mold is supported by the tie bar, but the tie bar also has a cantilever structure, so that the deformation amount is large. Further, since the pressing force is generated from the time when the air nozzle descends and comes into contact with the parison, the supporting member of the mold and the air nozzle is deformed, and the joint surface between the mold and the air nozzle is displaced, so that As shown in (a), the burr at the mouth of the hollow molded product is not cut off, resulting in a defective molded product.

The present invention has been made in view of the above problems of the prior art. The object of the present invention is to reduce the deformation of the air nozzle of the air blowing device and the supporting member of the mold. As shown in FIG. 5 (b), the deviation of the joint surface between the air nozzle and the mold is reduced to improve the burring of the mouth.

Another object of the present invention is to provide a simple and easy-to-adjust hook device which can reduce the deformation of the air nozzle and the supporting member of the mold.

[0008]

A method for preventing deformation of an air blowing device according to the present invention is a method for supporting deformation of a supporting member which respectively supports a mold and an air nozzle by a pressing force of an air nozzle against the mold. It is characterized in that the upper and lower hooks fixed to the hook mounting member provided at the end of the member are engaged and prevented.

In the hook device of the air blowing device according to the present invention, a horizontal key groove and an inclined key groove are formed facing each other on one hook side and a joint surface side of the hook mounting member, respectively. In addition, a hook key including a horizontal key portion and an inclined key portion is slidably fitted to each other, and one of the key portions is fixed to the key groove.

More specifically, the hook having a horizontal key groove is vertically movable.

More specifically, the lower hook is formed with a horizontal key groove, the hook mounting member is formed with an inclined key groove, and the inclined key groove has a horizontal key portion and an inclined key portion. Are slidably fitted and fixed.

More specifically, the upper hook is positioned on the hook mounting member by a knock pin, and the lower hook is vertically moved to the hook mounting member by a vertically elongated hole for a tightening bolt formed on the lower hook. Enabled and fixed.

The hook of the air blowing device according to the present invention has an engaging portion for engaging with the other hook. The attachment portion of one hook is formed with a vertically elongated hole for a tightening bolt. A horizontal keyway is formed on the mounting surface side.

The hook key of the air blowing device according to the present invention is formed on a parallel key portion slidably fitted in a horizontal key groove formed on the attachment surface side of the attachment portion of the hook and a hook attachment member thereof. And a tilt key portion slidably fitted in the tilt key groove, and the tilt key portion is provided with a long hole in the longitudinal direction for the tightening bolt.

[0015]

When the upper and lower hooks of the hook device are engaged with each other, the bracket for supporting the air blowing device and the tie bar for supporting the frame and the die are both supported at their end portions to form a double-supported structure. The quantity is reduced. That is, by engaging the upper and lower hooks of the hook device,
The amount of deformation is minimized by offsetting the pressing force that presses the air nozzle against the mold by the blow cylinder and the deformation caused by the reaction force. As a result, the displacement of the joint surface between the air nozzle and the mold is reduced.

In the above hook device, the tightening bolt fixing one hook to the hook mounting member is loosened, and then the tightening bolt fixing the tilt key to the tilt key groove of the hook mounting member is loosened. When the tilt key is moved diagonally downward, the horizontal key integrated with the tilt key slides along the horizontal key groove of the hook to move the hook up and down, and engage with the other hook. Gaps between parts can be eliminated or preloaded.

[0017]

Embodiments of the present invention will be described with reference to the drawings. FIG. 3 shows a hollow molding machine equipped with the hook device according to the present embodiment, FIG. 3 (a) is a front view thereof, and FIG. 3 (b) is a side view of FIG. 3 (a). In addition, the same or equivalent portions as those of the conventional example will be described using the same reference numerals. In addition, the description of the conventional example is referred to for the parts omitted in the description of FIG. 3.

In FIG. 3, reference numeral 15 indicates a hook device. The hook device 15 includes an upper hook 1 fixed to an end of a bracket 54 as a hook mounting member, which is provided so as to project from the frame 53 of the air blowing device 50 across the mold 30 and the frame 53 side. And a lower hook 2 fixed to a mold mounting plate 32 as a hook mounting member, the upper and lower hooks 1 and 2 being configured to be engaged on a vertical line. .

With such a structure, the bracket 54 and the frame 53 for supporting the air blowing device 50 and the like.
Also, the supporting members such as the tie bars 33 that support the mold 30 have a double-supported structure with their ends supported, so that the amount of deformation is small. That is, by engaging the upper and lower hooks 1 and 2 of the hook device 15, the blow cylinder 5
The pressing force for pressing the air nozzle 51 against the mold 30 and the deformation due to the reaction force thereof are canceled by 2 to minimize the deformation amount. As a result, the displacement of the joint surface between the air nozzle 51 and the mold 30 is reduced. Therefore, the mold 30 and the air nozzle 5
As shown in FIG. 3 (b), the joint surface with No. 1 is in agreement, and the molded product has good burrs and good molding of the mouth of the molded product.

Next, with reference to FIGS. 1 and 2, the hook device, the hook and the hook key according to this embodiment will be described in detail. FIG. 1 shows a hook device, and FIG.
Is a front view thereof, and FIG. 1 (b) is a side view of FIG. 1 (a). 2 shows a hook key, FIG. 2 (a) is a front view thereof, and FIG. 2 (b) is a side view of FIG. 2 (a).

In FIG. 1, the upper hook 1 is fixed to a bracket 54 as a hook mounting member by a tightening bolt 10 and a knock pin 13. This upper hook 1
It comprises a mounting portion 1a in which a bolt hole and a notch hole are formed and an L-shaped hook portion 1b. The lower hook 2 is fixed to a mold mounting plate 32 as a hook mounting member. The lower hook 2 has the same structure as the upper hook 1,
You may fix with the tightening bolt 10 and the knock pin 13. However, in such a configuration, since the upper hook 1 and the lower hook 2 are fixed by the tightening bolt 10 and the knock pin 13, when the engaging surfaces of the upper and lower hooks 1 and 2 are worn, the upper and lower hooks are re-worn. Adjust the engagement state of 1 and 2,
It is necessary to rework the knock hole for the knock pin 13 into a part different from the current knock hole. Further, the adjustment can be made only within the range of the size of the tightening bolt 10 hole.

Next, another embodiment of the hook device which solves the above problem will be described. In FIG. 1, the upper hook 1 has the same structure as that described above, and the lower hook 2 is fixed to the mold mounting plate 32 by a tightening bolt 11 and a hook key 3. The lower hook 2 is composed of a mounting portion 2a having a bolt hole and a horizontal key groove 5 and an L-shaped hook portion 2b. The upper hook 1 and the lower hook 2 are provided so as to be engaged with each other at an L-shaped horizontal portion thereof.

The lower hook 2 is formed with a vertically elongated hole 7 for the tightening bolt 11, so that the lower hook 2 can be moved up and down. Further, a horizontal key groove 5 is formed on the die mounting plate 32 side of the lower hook 2. An inclined key groove 6 is formed on the lower hook 2 side of the die mounting plate 32 so as to face the horizontal key groove 5. The angle α between the longitudinal center line of the inclined key groove 6 and the longitudinal center line of the horizontal key groove 5 of the lower hook 2 is preferably about 5 °.

The slanted key groove 6 is slidably fitted with the slanted key portion 3b of the hook key 3 in which the horizontal key portion 3a and the slanted key portion 3b are integrally formed. It is fixed by a tightening bolt 12 penetrating the hole 8. The horizontal key portion 3a of the hook key 3 is slidably fitted in the horizontal key groove 5 of the lower hook 2. The width of the hook key 3 is machined with the horizontal key groove 5 and the inclined key groove 6 with an accuracy of interference fit.

Next, the operation of the above embodiment will be described.

When a gap is generated between the horizontal portions of the engaging portions of the upper hook 1 and the lower hook 2 due to wear or the like, or when the burr of the mouth of the molded product is poor, or between the upper hook 1 and the lower hook 2. If it is necessary to provide a preload, loosen the tightening bolts 11 that secure the lower hook 2 to the mold mounting plate 32, and then insert the tilt key portion 3 into the tilt key groove 6 of the shape mounting plate 32.
Loosen the tightening bolt 12 fixing b, and tilt the key 3
When b is moved in the lower right direction in FIG. 1, the parallel key portion 3a integrated therewith is lowered, the lower hook 2 is moved downward,
The gap between the horizontal parts of the upper hook 1 and the lower hook can be eliminated or a preload can be provided between them. When a preload is applied, it is necessary to make the ends of the L-shaped horizontal portions of the hook portions 1b and 2b tapered to facilitate engagement. Further, it is necessary to increase the surface hardness of the tapered portion and the horizontal portion.

In the above embodiment, the lower hook 2 is provided with the parallel key groove 5 and the mounting plate 32 is provided with the inclined key groove 6. However, conversely, the upper hook 1 is provided with the parallel key groove 5 and the bracket 54 is provided with the inclined key groove. 6 may be provided, and the hook key 3 may be slidably fixed to the inclined key groove 6 with the tightening bolt 12.

Further, in the above embodiment, the tilt key portion 3b is slidably fitted in the tilt key groove 6 formed in the die mounting plate 32, and is fixed by the tightening bolt 12, but the tilt key portion 3b. The horizontal key portion 3a may be fixed to the lower hook 2 with a tightening bolt instead of being fixed to the inclined key groove 6 formed in the die mounting plate 32. In this case, it is necessary to form a horizontal elongated hole for the tightening bolt in the lower hook 2.

Although the hooks 1b and 2b have been described as L-shaped, various configurations are applicable. For example, a roller may be used for one of the hook portions 1b and 2b.

[0030]

Since the present invention is constructed as described above, the following effects can be obtained. That is, since the deformation of the air nozzle and the supporting member of the mold is reduced, the displacement of the joint surface between the air nozzle and the mold is reduced, and the burrs at the mouth are well cut. Further, a simple and easy-to-adjust hook device that can reduce the deformation of the air nozzle and the supporting member of the mold was obtained.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a hook device according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a hook key.

FIG. 3 is an overall schematic view of a blow molding machine equipped with a hook device.

FIG. 4 is an overall schematic view of a conventional blow molding machine.

FIG. 5 is a diagram showing a bonded state of an air nozzle and a mold.

[Explanation of symbols]

 1 Upper hook 1a Hook part 1b Mounting part 2 Lower hook 2a Hook part 2b Mounting part 3 Hook key 3a Horizontal key part 3b Inclined key part 5 Horizontal keyway 6 Inclined keyway 7,8 Long hole 10, 11, 12 Tightening Bolt 13 Knock pin 15 Hook device 30 Mold 31 Type mounting plate 32 Type mounting plate (hook mounting member) 33 Tie bar 50 Air blowing device 51 Air nozzle 52 Blowing cylinder 53 Frame 54 Bracket (hook mounting member)

Claims (5)

[Claims] 1. An air nozzle (5) for a mold (30).
The die (30) and the air nozzle (5) by the pressing force of 1)
The deformation of the support member supporting each of 1) is performed by hook mounting members (54, 3) provided at the ends of the support member.
A method for preventing deformation of an air blowing device, characterized by engaging and preventing upper and lower hooks (1, 2) fixed to (2). 2. An upper hook (1) fixed to a hook mounting member (54) projecting from the frame (53) on the mold (30), and a mold mounting plate (31) on the frame (53) side. And a lower hook (2) fixed to a hook mounting member (32) facing each other, and the upper and lower hooks (1, 2) are engaged with each other on a vertical line.
0) Hook device. 3. A horizontal key groove (5) and a tilted key groove (6) are provided facing each other on the joint surface side of one hook (1, 2) and the hook mounting member (54, 32). And a hook key (3) including a horizontal key portion (3a) and an inclined key portion (3b) is slidably fitted in both key grooves (5, 6), and one of the key portions is formed. (3a,
Hook device for an air blowing device for a blow molding machine according to claim 2, characterized in that 3b) is fixed in the keyway (5, 6). 4. A horizontal keyway (5) is formed on the lower hook (2), an inclined keyway (6) is formed on the hook attachment member (32), and the inclined keyway (6) is horizontally aligned. The air blower for a blow molding machine according to claim 3, wherein a hook key (3) comprising a key portion (3a) and an inclined key portion (3b) is slidably fitted and fixed. Device hook device. 5. The upper hook (1) is positioned on the hook mounting member (54) by a knock pin (13), and the lower hook (2) is a tightening bolt (11) formed on the lower hook (2). 5. A hook device for an air blowing device for a blow molding machine according to claim 4, wherein said hook mounting member (32) is vertically movable and fixed by a vertical elongated hole (7). .