JPS5925624Y2 - Positioning device for synthetic resin long slide fastener molding - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a positioning device for molding a synthetic resin long slide fastener.

In conventional continuous molding of fastener chains, a first preformed tooth row is formed by a set of molds having a series of cavities, and a next molded tooth row is subsequently molded by this mold. The method described below is known as a method for making the pitches accurately continuous with each other.

In other words, 1. A mechanism is provided to move the movable mold in a direction perpendicular to the mold opening/closing movement, and the molding door is moved while being fixed after or during mold opening, and the clamp adjacent to the mold is moved immediately before ejection of the molded product. A method in which the molding door is fixed by a device, and after the molding door is extended, only the movable mold is returned to its original position.

2. After ejecting the molded product, take it up or send a rough stroke using a feed cylinder, and then, for pitch adjustment, insert the molded protrusion provided on the rear end tooth of the pre-formed movable tooth row or the molded protrusion on the runner into the mold. A method that uses force to press the mold surface vertically into the hole or hole provided at the inner front end when the mold is closed.

3 After the molded product has been ejected, it is sent beyond the molding length using a feed cylinder, and then, during the mold closing process, the tape is once reversed using a tension roller, and the last end tooth of the preceding preformed tooth row is This is a method in which the next position tooth row is formed by applying it to the end face of a movable mold.

However, these known methods have the following drawbacks.

In other words, in method 1: (a) If the mold is very heavy and is to be moved together with a fixed molded product and stopped at a certain dimension, the moving speed cannot be set too fast when inertia is taken into consideration.

Furthermore, when performing subsequent molding, the mold must return to its original position.

Therefore, due to these factors, the molding time has to be extended.

(b) The mechanism for moving the mold becomes complicated, and
The mold is easily damaged.

In method 2, the final positioning by fitting the rear end tooth of the leading mold tooth row or the molding protrusion provided on the runner into the slot in the mold is performed on the mold surface by closing the mold. The pressing in is performed by force and is completed at the same time as the mold is closed.

Until the positioning is completed, the tape moves in a direction perpendicular to the mold closing direction as the leading molding tooth row moves.

However, the tape started to be tightened on the mold surface even before the mold was closed.
After the mold is closed, a large tightening force is applied.

Due to the movement of the tape due to these positioning corrections and the generation of force due to tightening due to mold closing, the tape within the mold causes variations in tension and elongation, making it impossible to produce a stable product.

(b) Since the tape is moved to correct the positioning until the mold is closed, the tape fits into the groove in the mold unstable, making it impossible to check the tape in a stationary state.

C. Positioning is performed by fitting the tape into a groove or hole, but the tape may move in a different direction each time during final positioning.

2. If the amount of feed by the feed cylinder is not determined accurately, the guide part may be caught and crushed by the mold closing, so correction cannot be made using the guide hole.

In addition, even if the feed amount by the feed cylinder is accurate, the clamp part of the already molded product is the previous molded product, so shrinkage of the molded product may occur at the rear end tooth of the already molded tooth row. This results in a large error and is unstable.

In other words, the tape tension changes each time it is molded, making it impossible to produce a stable product.

In method 3, (a) Pressing the leading tooth row requires complicated devices such as a guide mechanism and a tension roller for returning the fastener chain, making it expensive.

(b) Since only one pair of fasteners is brought into contact with the end face of the mold, the weight of the tension roller, the shock caused by the sudden stop (when the fasteners hit the metal end face), and the heat immediately after molding deform the product, the fasteners. This makes highly accurate positioning difficult.

Therefore, the present invention eliminates these drawbacks of conventionally known positioning methods, reduces molding time, simplifies the mechanism, protects the mold, and provides a synthetic method that can mold products with higher precision. The object of the present invention is to obtain a positioning device for molding a long slide fastener made of resin.

Hereinafter, the present invention will be described with reference to Nos. 1 to 8 of the accompanying drawings showing embodiments thereof.
This will be explained based on the diagram.

First, in Fig. 1, 1 and 1' are the molds, 2 and 2' are the plates on which the molds 1 and 1' are mounted, and 3 is the already molded front tooth row. A brake guide plate 4 is disposed adjacent to the front molding tooth row 3 of the mold 1' and in the same plane as the mold 1'.

In addition, when mounting one mold 1, there is a brake guide plate 4 on the panel 2.
A feed presser plate 5 for moving the preformed tooth row 3 forward is attached via a spring 6 and a guide block 7, as will be explained in detail later based on 2nd and 3rd sections. is movably attached to the board 2.

It should be noted that the previous molded tooth row 3 and the next molded tooth row 3' to be molded next are connected by a tape 8.

Also, on the tape 8 side of the mold 1', there is a
A tensioning device 9 for applying a constant tension to the tape 8 in '
However, this tension device 9 sandwiches the surface of the tape 8 and can be adjusted by adjusting the built-in spring or by changing the weight of the metal by replacing the metal piece placed on the tape 8. The clamping device 10 grips the tip of the tooth row 3, and the feed cylinder 11 feeds it by a fixed length. occur.

In this embodiment, the feeding is shown as being carried out by a cylinder, but this may also be done by an electric motor winding method.

Figures 2 and 3 now show details of two embodiments of the positioning device.

In these embodiments, in FIG. 1, the brake guide plate 4 is integrally attached to the mold mounting panel 2', and as shown in FIGS. The mounting is fixed to the panel 2' through the plate 12, but it may be mounted either way.

Further, the brake guide plate 4 is provided with a brake groove 13 for positioning, while the mold mounting is performed by a feed presser plate 5 attached to the panel 2.
, there is a claw 1 for hooking and feeding the preformed tooth row 3.
4 is provided, but instead of this pawl 14, rubber or the like may be used to provide contact resistance with the engagement tooth.

Next, there is a spring 6 between the feed presser plate 5 and the guide block 7, and in order to make this spring 6 deflect in parallel when the mold is opened, the feed presser plate 5 is attached to the guide block 7. The lower end of the guide pin 15, which is attached to be movable in the mold closing direction, is fixed, and a spring 6 is wound around the guide pin 15 between the guide block 7 and the feed presser plate 5.

Further, in the embodiment shown in FIG. 2, the guide block 7
The mold mounting is connected to the seat 16 on the board 2 by pivoting the arm 17 to the seat 16 and the guide block 7 at both ends thereof via shafts 18, respectively. ing.

Furthermore, for installation, a rail 19 is attached to the end of the seat 16 in parallel to the mold closing direction, and a sliding block 20 that moves along this rail 19 is provided. When the guide block 7 moves in the mold closing direction via the arm 17, the guide block 7 uses the sliding block 20 as a guide to guide the moving direction of the sliding block 20. make it move in a direction perpendicular to.

Further, a stopper 21 is attached to the rail 19 on the lower side of the sliding block 20 to limit its descent.

In this way, in the embodiment shown in FIG. 2, the feed presser plate 5 rotates about the shaft 18 via the arm 17 due to the mold closing force, and at the same time moves in the direction of the leading molding tooth row 3. It is structured like this.

Next, in the embodiment shown in FIG.
Rail 1 is attached to the tip of ' at an angle to this.
The guide block 7 is moved along the guide block 9', and thereby the holding plate 5 is moved in the direction of the leading molding tooth row 3 due to the mold closing force.

Note that Figures 4, 5, and 6 are enlarged views of a part of the fastener molding part. There is a molded protrusion 25 for braking on the rear end, and in this specification, the fastener 23, runner 24, and molded protrusion 25 formed on the tape 22 are collectively referred to as the "previous molded fastener row 3". or"
3'.

Next, FIG. 7 is a diagram showing the state before positioning by the device of the present invention, and FIG. 8 is a diagram showing the state after positioning is completed. Now, based on these diagrams and FIGS. 1 and 3, The operation of the positioning device according to the present invention having the above-mentioned configuration will be explained as follows by taking the embodiment shown in FIG. 3 as an example.

1. Synthetic resin is injected by an injection cylinder into the molds 1 and 1' which have been completely closed, and after injection, the molded product is completed after holding pressure and cooling time.

After molding, the mold is opened and the molded product is separated from the molds 1, 1' by an ejector rod (not shown).

At the same time as the mold is opened, the brake guide plate 4 and the feed presser plate 5 are also opened.

A clamping device 10 clamps the leading mold tooth row 3 in the vicinity of the molds 1, 1'.

4 When the clamping is completed, the feed cylinder 11 is activated to feed the material shorter than the forming length.

After the feeding is completed, mold closing starts again, and before the mold closing is completed, the feeding presser plate 5 comes into contact with the already molded leading molding tooth row 3, and the pawl 14 enters between the rear toothing 23 (the seventh figure).

Further, as the mold closing progresses, the guide block 7 advances along the rail 19', and at the same time, the feed presser plate 5 is moved through the guide pin 15 to the rear tooth of the leading forming tooth row 3. Similarly to the feed cylinder 11, the leading molding tooth row 3 is pushed forward via the pawl 14 engaged with the slider 23.

As a result, the molding protrusion 25 is caught in the brake groove 13, and the advance of the leading molded tooth row 3 is stopped, completing the positioning (FIG. 8).

7. The mold is further closed, but after the positioning is completed, the spring 6 bends to absorb the mold closing stroke, the mold is completely closed, and the next molding is performed.

By repeating these steps 1 to 7 the required number of times,
Long fasteners corresponding to the number of moldings are manufactured.

In the embodiment shown in FIG. 2, the above operation step 1
5 is similar to the embodiment shown in FIG. 3, but its operating step 6 operates as follows and is carried over by the operating step 7 described above.

That is, as the mold closes further, the advance of the guide block 7 is stopped by the contact of the feed presser plate 5 with the previous molding tooth row 3. will move downward relative to the stationary guide block 7.

However, since the guide block 7 and the mounting seat 16 are connected via the shaft 18 and the arm 17, the above-mentioned downward movement is possible only by rotating the arm 17, and therefore the guide block 7 is moved in the advancing direction of the leading tooth row 3 by a horizontal component force corresponding to the rotation angle of the arm 17.

This movement is to move the feed presser plate 5, which is integrally constructed in the horizontal direction, in the advancing direction of the leading forming tooth row 3. Therefore, the leading forming tooth row 3 , and is pushed forward in the same manner as the feed cylinder 11 by the pawl 14 of the feed presser plate 5 which is inserted between and engaged with the rear engagement teeth 23 of the feed cylinder 11.

As a result of this pushing, the forming protrusion 25 is caught in the brake groove 13 during the pushing, similar to the embodiment shown in FIG. ).

In this way, also in the embodiment shown in FIG. 2, after the above-mentioned operation step is completed, the above-mentioned operation step 7 is continued.

Since the present invention has the above-described configuration and operation, various excellent effects as described below can be obtained.

In other words, 1. Molding time can be shortened. 2. Since positioning is completed before the mold is closed, the tape inside the mold does not move, resulting in higher pitch accuracy. 3. After positioning is completed, the tape remains stationary. This ensures that the tape fits into the tape groove inside the mold,
4. The mechanism is simple, and the mold is small, resulting in low cost. 5. The feed stroke can be approximate as long as it is short. 6. It can be easily installed on a general-purpose resin injection machine. 7. Positioning The mold closing force is applied to the mechanism, and it can be adjusted steplessly, and since the molded product is held down by a spring, it does not damage the pre-formed tooth row.8 The tape correction movement direction is always fixed. 9. Easy maintenance and inspection. Since it is not integrated with the IO mold, it is not affected by the temperature of the temperature-controlled mold, and the mechanism for generating tape tension in front of the mold is simple. There is no deformation, etc.

[Brief explanation of the drawing]

FIG. 1 is a schematic overall layout of a fastener forming device equipped with the present invention, FIGS. 2 and 3 are detailed views showing two embodiments of the positioning device according to the present invention, and FIG. 4 is a part of a formed fastener. , FIG. 5 is a view from the ■-V arrow in FIG. 4, FIG. 6 is a VI-VI view from FIG. 4, and FIG. FIG. 8 is a similar explanatory diagram after the positioning is completed. 1.1'...Mold, 2,2'...Mold installation is on the board, 3...Previous molding tooth row, 3'...
...Next molding tooth row, 4...Brake guide plate, 5
...Feeding plate, 6... Spring, 7...
...Guidance block, 8...Tape, 9...
...Tension device, 10... Clamp device, 1
1...Feeding device, 12...Mounting plate,
13... Braking groove, 14... Pawl, 1
5...Guide pin, 16.16'...
Installation is on the seat, 17... Arm, 18...
Axis, 19.19'...Rail, 20...
・Swivel block, 21... Stopper, 22
...Tape, 23...Fukugaku, 24...
...Runner, 25... Molded protrusion.

Claims (1)

[Claims for Utility Model Registration] 1. A pair of molds 1.1' formed with a series of cavities.
To install one of the molds 1', a brake guide plate 4 is placed on the plate 2' on the side of the leading molding tooth row 3 so as to be adjacent to and flush with the mold 1'. facing the other mold 1
The mold is mounted using a positioning device for molding a synthetic resin long slide fastener, in which a feed presser plate 5 is attached to the board 2 so as to move parallel to the mold closing direction and parallel to the tape traveling direction using the mold closing force. . 2 A brake groove 13 is provided in the brake guide plate 4 in a direction perpendicular to the direction of tape travel, and a pawl 14 is provided in the feed presser plate 5.
A positioning device according to claim 1 of the utility model registration claim. 3 To install the mold 1, attach the rail 19 to the board 2 parallel to the mold closing direction, attach the sliding block 20 to it so that it can move, and attach the guide block 7 to the sliding block 20 with a tape. Utility model registration claim 1 or 2, in which the guide block 7 is attached so as to be movable in parallel to the direction of movement, and the feed presser plate 5 is attached to the guide block 7 via a spring 6 so as to be movable in parallel to the mold closing direction. Positioning device. 4 The guide block 7 and mold 1 are installed on the board 2.
3. The positioning device according to claim 3, which is a utility model and is interconnected by an arm 17 forming a link mechanism. 5 To install the mold 1, a rail 19' having an angle with respect to the mold closing direction is attached to the panel 2, a guide block 7 is movably attached to this rail 19', and a feed presser plate is attached to this guide block 7. 5 is attached via a spring 6 so as to move parallel to the mold closing direction.Claim 1 of Utility Model Registration
Or the positioning device according to item 2.