JPS5854013B2 - Molding equipment for synthetic resin long slide fasteners - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a molding device for a synthetic resin long slide fastener.

In conventional continuous molding of fastener chains, a set of molds having a series of cavities is used to form the first required tooth row, and the next molding process is subsequently molded by this mold. The following device is known as a method for accurately continuing the pitch between the teeth.

Namely, 1) A mechanism is provided to move the movable mold in a direction perpendicular to the mold opening/closing motion, and after or during mold opening, the movable mold is moved with the molded product fixed thereto, and the molded product is moved immediately before the molded product is ejected. The molded product is fixed by a clamp device located adjacent to the mold L-1. After the molded product has been ejected, only the movable mold is returned to its original position.

2) After ejecting the molded product, take it up or send a rough stroke with a feed cylinder, and then adjust the final pitch and align the leading pre-formed tooth row with the rear end tooth, or,
A molding device in which the molding protrusion provided on the launcher is fitted into the hole or hole provided at the front end of the entire mold using the pressing force of the mold surface at the same time as mold clamping.

3) After the molded product has been ejected, it is fed by a feed cylinder beyond the molding length, and then during the mold closing process, the tape is once reversed by a tension roller, and the end tooth of the previous existing required tooth row is A molding device that applies the metal to the end face of the mold to form the next tooth row.

etc.

However, these known methods have the following drawbacks:
There are drawbacks.

In other words, method 1) [button ii] If the weight of the mold is very heavy and it is moved together with the fixed molded product and stopped by pressing the button to a certain size, considering the inertia force - the moving speed too early (cannot be set).

When performing subsequent molding after breaking, the mold must return to its original position.

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

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

Regarding method 2), a) Final positioning by fitting the rear end tooth of the leading pre-formed tooth row or the molding protrusion provided on the launch into the slot in the mold is done by closing the mold. This is done by pressing force applied to the mold surface, and is completed at the same time as mold clamping is completed.

At the time of completion of positioning, the tape moves in a direction perpendicular to the mold closing direction as the leading low molding tooth row moves.

However, the tape started to be tightened on the mold surface even before the mold was closed.
A large clamping force is applied when mold clamping is completed.

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

口) Since the tape is moved to correct positioning at the time of completion of mold clamping, the tape entering the groove in the mold becomes unstable, and it is difficult to check the tape while in a stationary state. Can not.

-゛) The mold becomes larger and heavier as holes are drilled into the mold to fit the parts other than the molded product.

As the mold size increases, the size of the mold mounting board also increases.

2) Since the temperature of the mold is controlled, it is conceivable that the portion of the leading molding tooth installed in the mold for positioning may be deformed.

In the case of method 3), devices such as (a) a pressing guide mechanism for aligning the leading molding tooth along the end surface of the mold, a tension roller for returning the fastener chain, etc. are complicated and expensive.

Since a pair of connecting teeth are brought into contact with the end surface of the mold, the idea is that the weight of the tension roller and the impact caused by sudden stops (when the connecting teeth hit the metal end surface) will deform the connecting teeth, which is the product. 1- It is difficult to perform high-precision positioning.

The present invention eliminates these drawbacks of conventionally known molding devices, reduces molding time, simplifies the mechanism, protects the mold, and molds products with higher precision using synthetic resin. The object of the present invention is to obtain a molding device for manufactured long slide fasteners.

Hereinafter, the present invention will be described with reference to Figs.
This will be explained based on Figure 0.

Referring to Figure 1, -F is a movable mold, 2 is a fixed mold with a cavity for molding protrusions, 3.3' is a mounting plate for each mold, and 4 is a tip that has already been molded. It shows the positional dentition,
A positioning guide plate 5 is disposed adjacent to the front low forming tooth row 4 of the fixed mold 2 and in the same plane as the mold surface.

On the mounting plate 3' of the movable mold that has been cut, there is a plate 1 facing the guide plate 5.
．． A positioning presser plate 6 is movably attached to a mounting seat 8 via a spring 7.

Among them, the leading low molded tooth row 4 and the next molded tooth row 9' are connected by a tape 9.

-Also, on the tape 9 side of the fixed mold 2, there is a tension device 10 for applying a constant tension to the tape 9 in the mold during molding. The pressing, which is adjusted by adjusting the built-in spring or by changing the weight of the metal by changing the metal piece placed on the tape 9, generates a force that grips the leading low profile engagement tooth row 4 by the clamping device 11 and clamps it. By feeding the tape by a fixed amount using the feed cylinder 12, tension is generated in the tape 9 within the molds 1 and 2.

Although the button in this embodiment has been described as using a cylinder type as the feeding device, a motor winding type may also be used.

In addition, as shown in FIG. 1, even if the positioning clamp mechanism is intercepted from the guide plate 5, presser plate 6, spring 7, and mounting seat 8, the positioning clamp mechanism is linked to the mold closing operation of the movable mold 1 and is mounted. The presser plate 6 located in front of the cavity surface of the movable mold 1 via the seat 8 and the spring 7 presses the front preformed tooth row 4 before mold clamping is completed.
is pushed into the guide plate 5 to complete positioning.

Thereafter, the mold closing operation continues, but the spring 7 is compressed and absorbs the 60 strokes of the presser plate at the end of mold clamping.

Next, FIGS. 2 and 3 show another embodiment of the present invention, and this clamp mechanism is made up of a guide plate 5, a presser plate 6, and a presser cylinder 13 for pressing the presser plate 6. The buttons are fixed to the stationary mold mounting board 3 by a mounting plate 14.

During operation, the presser cylinder 13 is operated after confirming that the feed is fixed and the presser cylinder 13 is not bent, and as in the case of the embodiment shown in FIG.
The position is determined by pressing the presser plate 6.

The operation of the presser cylinder 13 may be completed during the mold closing operation, or the mold may be closed after confirming the operation of the presser cylinder 13.

Figures 4, 5 and 6 show the molded fastener, 15 is the fastener, 16 is the runner, and runner 1.
The molded protrusion 17 molded in 6 is used for positioning, as will be explained below.

Furthermore, FIGS. 7 and 8 show an embodiment of the positioning guide plate 5, and FIG. The button in the figure shows the connecting teeth 15 and 15 without using the molded protrusion 17.
A guide comb 19 is provided which is fitted between.

That is, FIGS. 9 and 10 show the principle of positioning using the guide plates shown in FIGS. 7 and 8, respectively.

The device according to the present invention has the above configuration, but the first
The overall operation will be explained as follows with reference to the figure.

1. Synthetic resin is injected into the molds 1 and 2, which have been completely clamped, using an injection cylinder, and after injection, the molded product is completed after a period of holding pressure and cooling.

2. After molding, the mold is opened and the molded product is separated from the molds 1 and 2 by an ejector rod (not shown).

Note that the presser plate 6 is moved backward at the same time as the mold is opened, and the positioning hole 18 of the guide plate 5, the molding projection 17, or the engagement tooth 15 and the guide comb 19 are removed by the ejecting operation.

3. The clamping device 11 clamps the preformed tooth row 4 near the mold 1.2.

4. When the operation of the clamp device 11 is completed, the feed cylinder 12 is activated and feeds by a fixed amount.

5. When the feeding operation is completed, the clamp mechanism is activated 17 at the same time as the mold is closed, and after the positioning by the holding plate 6 is completed, mold clamping is also completed.

By repeating steps 1 to 5 as many times as necessary,
Long fasteners corresponding to the number of moldings are manufactured.

Since the present invention is configured as described above, various excellent effects as described below can be obtained.

That is, 1. The molding time can be shortened. 2.
Since the positioning is completed before the mold clamping is completed, the tape inside the mold does not move, resulting in higher pitch accuracy. 3. After the positioning is completed, the tape remains stationary, so the tape inside the mold does not move. The tape is firmly inserted into the groove,
4. The mechanism is simple, the size and mold are small, and the price is low. 5. It can be easily installed on a general injection machine. 6. The feed stroke has approximate accuracy. 7. Since mold clamping force is not applied to the positioning clamp mechanism, there is no need to process grooves on the holding plate, etc., and the pressing force can be adjusted steplessly. 8. Safety inspection is easy. 9. The fitting teeth do not deform as they are not affected by temperature changes due to temperature adjustment of the mold. 10. The positioning gear is built into the mold as an integral part of the mold, which requires a large amount of force, unlike when it is inserted into the mold. Positioning must have already been completed with this device before tightening.

This makes it possible to obtain a good product without crushing the molded product with the mold.

[Brief explanation of drawings]

FIG. 1 is a schematic overall layout diagram showing one embodiment of the device of the present invention;
Fig. 2 is a side view showing another embodiment of the positioning part, Fig. 3 is a view taken from the ■-■ arrow in Fig. 2, and Fig. 4 is a plane view of the fastener formed by the apparatus shown in Figs. 1 to 3. Figure 5 is the 4th
Figure ■-■ arrow view, Figure 6 is a VI-Vl arrow view in Figure 4,
Figures 7 and 8 are perspective views showing two different embodiments of the guide plate; Figure 9 is a diagram of the operating principle of the guide plate shown in Figure 7;
FIG. 0 is a diagram showing the operating principle of the guide plate shown in FIG. 8. 1.2...Mold; 3, 3'...Mold mounting plate; 4...Top pre-formed tooth row;5...
...Guidance board; 6...Press plate;7...
Spring; 8... Mounting seat; 10... Tension device; 11... Clamp device; 12...
Feed cylinder; 13... Presser cylinder: 14.
... Mounting plate; 17 ... Molded protrusion; 18.
...Positioning hole; 19...Guide comb.

Claims (1)

[Scope of Claims] 1. A movable mold having a series of cavities, a fixed mold provided with a cavity for forming protrusions formed on the launch, a feeding device for feeding the fastener chain by a fixed length after molding, and an existing required tooth row side. a guide plate which is arranged adjacent to and on the same plane as the fixed mold and has a positioning hole into which the molding projection fits; and a guide plate which is arranged opposite to the guide plate and is movable toward the guide plate. 1. A molding device for a synthetic resin long slide fastener, characterized by comprising a presser plate. 2. The molding apparatus according to claim 1, wherein the presser plate is attached to a mold mounting board to which a movable mold is attached via a spring and a mounting seat. 3. The molding apparatus according to claim 1, wherein the presser plate is operated by a presser cylinder attached via a mounting plate to a mold mounting board to which a movable mold is attached.