JPH0615746A - Method and apparatus for bonding terminals of synthetic resin molding - Google Patents

Abstract

PURPOSE:To bond the terminals of a synthetic resin molding in a novel manner so as to be capable of beautifully treating the terminals at the time of bonding. CONSTITUTION:The terminals of a synthetic resin molding are bonded by a process heating the terminals M1, M2 to be bonded of the synthetic resin molding M to bring the same to a molten state and a process bringing the molten terminals to be bonded to a contact state to integrally weld both of them while the outer periphery of the contact part of them is prescribed by molding blades 27, 37 having a predetermined shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for joining terminals of a synthetic resin molding.

[0002]

2. Description of the Related Art A window molding made of a long extrusion molded product of synthetic resin such as vinyl chloride is used for mounting a window glass on a vehicle body and for concealing the gap. In the case of a window molding called a bright foil molding, a metal such as chrome is vapor-deposited with an adhesive on the surface-side design surface of a molding body made of a synthetic resin extruded product to a thickness of 0.2 to 0. A 4 mm fluororesin film is coated to form a glitter foil portion.

However, in this type of wind molding, when it is mounted on the rear window of an automobile or the like, a single long wind molding is bent into a window frame shape and both ends thereof are integrally joined. There is.

An example of a conventional method for integrally joining the ends of this synthetic resin molding is shown in FIGS. 12 and 13. As shown in the figure, in this method, both ends of a molding to which a heating plate or the like is joined are brought into contact with each other, and the both ends are heated and melted, then pressure-bonded to each other and integrally welded. The illustrated example represents the bright foil molding, reference numeral 100 is a molding body, N is a design surface of the molding and is composed of a bright foil portion H, E is an adhesive, F is a chrome layer, and G is a fluororesin film.

However, in this method, after welding the ends of the molding, it is necessary to cut off the protruding deformed portion m along the original shape of the molding, which is troublesome and the joints are not uniform. There was a chance Code C-
C is a cutting line. Further, since the width of the protruding deformed portion m is increased, when the molding to be joined is the glitter foil molding as described above, by cutting off the protruding deformed portion m, as shown in FIG. Body 1
00 appeared wide on the design surface N, and the width thereof ranged from 0.8 mm to 1.2 mm, and the breakage of the bright foil portion H was remarkable, and the appearance was likely to be impaired. Further, since the bright foil portion H is largely bent, there is a problem that the fluororesin film G on the surface is peeled off or loses gloss and becomes cloudy.

[0006]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above problems, and is a novel terminal joining of a synthetic resin molding that can be treated beautifully when joining a synthetic resin molding. A method and apparatus are provided.

[0007]

First, a first aspect of the present invention proposed here is that a step of heating a joined terminal of a synthetic resin molding to a molten state and joining the joined terminal in the molten state together. And a step of integrally welding while controlling the outer periphery of the joining portion with a mold blade having a predetermined shape.

A second aspect of the present invention is an apparatus for carrying out the method for joining terminals of a synthetic resin molding as described above,
That is, it is composed of a pair of mold members having a molding holding portion and a bonding surface which can be fitted or separated from each other, and the molding member has a predetermined shape that defines the outer peripheral shape of the molding fitting portion on the bonding surface. The present invention relates to a terminal joining device for synthetic resin moldings.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a cross-sectional view showing a main part of an apparatus used for a method of joining terminals of a synthetic resin molding of the present invention, FIG. 2 is a front view showing an example of a mold member according to the apparatus of the present invention, and FIG. It is a front view.

4 to 10 show an example of the method of the present invention. FIG. 4 is a schematic side view of the apparatus showing a state in which the stopper is lowered, and FIG. 5 is a schematic side view showing the molding holding state thereof. FIG. 6 is a schematic side view showing a state of heating a joined terminal of a molding, and FIG. 7 is a schematic side view showing another example,
8 is a schematic side view showing the molten state of the terminal, FIG. 9 is a schematic side view showing the welded state, and FIG. 10 is an enlarged cross-sectional view of the relevant part.

FIG. 11 is an enlarged cross-sectional view of the main part of the joint portion of the synthetic resin molding obtained according to the present invention.

The synthetic resin molding M obtained by the present invention is, for example, in the above-mentioned glitter foil molding, as shown in FIG. 11, the molding terminals M1 and M2 are integrally melted at the joining portion P. While being joined together, the bright foil portion H is welded with almost no space, and the appearance of the fluororesin film G is extremely beautiful without peeling or clouding.

1 to 3 show an example of a terminal joining device 10 for a synthetic resin molding according to the present invention. The terminal joining device 10 includes a pair of mold members 10A and 10B that hold and join the terminals M1 and M2 to be joined of the molding, and the guide rail R
It is configured to be slidable through and can be attached to or separated from each other.

In this embodiment, the mold member 10A is used.
Is a fixed-side mold member fixed to the base B, and the mold member 1
0B is configured as a movable side mold member that can move forward and backward with respect to the fixed mold 10A. Also, this mold member 10
Since A and 10B are usually constructed by the same structure, the description of the mold member 10A will be replaced with the description of the mold member 10B.

The mold member 10A (10B) comprises a lower mold member 20 and an upper mold member 30, which can be clamped and fixed integrally by a pressing member 40, as will be better understood from FIGS. 2 and 3. Is formed in. Reference numeral 45 is a cylinder device for vertically moving the pressing member 40.

The lower die member 20 comprises a lower die body 21 and block dies 22, 23.
Are elastically connected to the lower main body 21 via springs 24 and 25 as shown in the figure. The lower mold body 21 and the block molds 22 and 23 have respective mold surfaces 21.
The outer peripheral shape of the molding to be joined by a, 22a, and 23a is partially configured, and the side end of each of the above-mentioned molding surfaces forms a bonding mold surface 26 with one mold member 10B to be bonded. is doing.

On the other hand, the upper mold member 30 is composed of a lower mold body 21 of the lower mold member 20 and a mold body 31 which comes into contact with the block mold 23, and is connected to the lower mold member 20 by a known cylinder device 32. It is configured to move forward and backward.

Like the lower mold member 20, the mold body 31 partially constitutes the outer peripheral shape of the molding to which the mold surface 31a is joined, and the lower mold member 20 is held by the pressing member 40. And when the upper mold member 30 is clamped,
The mold surfaces 21a, 22a, 23a, 31a form a molding holding portion 35 that constitutes the overall shape of the molding outer circumference. At the side end portion of the mold surface 31a, a combined mold surface 36 with one mold member 10B to be joined is formed.

Forming blades 27 and 37 that define a predetermined molding outer peripheral shape are formed at the tips of the joining die surface 26 of the lower die member 20 and the joining die surface 36 of the upper die member 30.
The die blades 27 and 37 are brought into contact with or abut against the die blade by the attachment of one die member 10B, and the end M of the molding to be joined is joined.
The outer peripheral shapes of 1 and M2 are pressure-bonded while restricting the outer peripheral shape to the original shape of the molding, and the protruding end portion m is cut.

In this embodiment, since the joining mold surface 26a of the lower mold body 21 defines the design constituting surface of the molding,
The die blade 27a is preferably provided with an acute tip and a clearance between the die blade 27a and the joining die surface of one die member 10B is provided as small as possible, and in this embodiment, it is set to 0 mm. As a result, the molding protruding portion m is sharply cut, so that the joints of the moldings to be joined are not conspicuous and the appearance of the design surface can be improved.

At this time, the die blade 2 is formed by bonding the die members.
In order to prevent the 7a from being damaged, a protrusion-shaped protection block 28 having a slight clearance (0.02 mm) with respect to the die blade 27a is formed on the side surface of the lower die body 21. . Incidentally, reference numeral 29 is the mold blade 27.
It is a relief portion of the protruding portion m of the molding cut by.

The mold dies 27 and 37 of the block molds 22 and 23 and the upper mold member 30 which define the non-designed surface of the molding joint portion have a larger clearance than the mold knives 27a of the lower mold body material. In this example, 0.2 m
formed in m. Reference numeral 38 is a relief portion of the protruding portion m in the joined portion of the molding.

As shown in FIGS. 4 to 8, the synthetic resin molding terminal joining method of the present invention comprises a step of heating and melting the molding terminal and a step of welding the molding terminal.

First, as shown in FIG. 4, the stopper 50 of the molding is lowered by the known cylinder device 60 between the fixed-side mold member 10A and the movable-side mold member 10B of the joining device 10.

The stopper 50 is for positioning the end portion of the molding to be joined at the most appropriate position with respect to the heat source 70 for heating and melting. In addition,
Reference numerals M1 and M2 are end portions of the moldings to be joined, and 80 is a cylinder device for moving the heat source 70 up and down.

The heat source 70 is made of an iron plate or the like having a heater (not shown) or the like, and is heated to a predetermined molding melting temperature. In this embodiment, the heating temperature of the heat source 70 is adjusted to 250 to 290 degrees.

Next, as shown in FIG. 5, the terminals M1 and M2 of the molding are inserted into the molding holding portions 35 of the fixed-side mold member 10A and the movable-side mold member 10B, respectively, and the end faces thereof contact the stopper 50. Positioned in contact.

Thereafter, as shown in FIGS. 6 and 7, the stopper 50 retracts from between the molds, the heat source 70 is arranged at the position of the stopper 50, and the movable mold member 10B is fixed. The end M2 of the molding contacts the heat source 70 by sliding in the direction of the mold member 10A.

Furthermore, by moving the movable side mold member 10B and the heat source 70 in the direction of the fixed side mold member 10A,
The molding terminal M1 held by the fixed-side mold member 10A contacts the heat source 70.

The terminals M1 and M2 of this molding are heated for a proper time by a timer or the like provided in the heat source 70 to be in a molten state. The melting amount is appropriately determined depending on the material and thickness of the molding to be joined, and is 1.0 to 1.5 mm / piece in this embodiment.

It is also possible to melt the molding terminal without contacting the heat source 70. Thereby, thermal deformation of the terminal of the mall can be suppressed as much as possible, and the appearance of the product can be further improved. In this case, the temperature of the heat source 70 is set to 600 to 800 degrees.

Then, when the end portion of the molding is melted by a predetermined amount, the heat source 70 descends outside the mold and returns to a predetermined position, and the movable side mold member 10B moves forward again and joins with the fixed side mold member 10A. The molding terminals M1 and M2 are crimped.

At that time, as can be better understood from FIG. 10, the portion m protruding from the predetermined outer peripheral shape of the molding due to the press-fitting of the molding is the mold members 10A and 10B.
The cutting blades 27 and 37 formed on the joining mold surfaces 26 and 36 are cut or regulated and joined. In particular, since the outer peripheral shape of the design surface N of the molding is regulated by the die blade 27a formed with a sharp tip, the molding body portion can be integrally welded with almost no appearance. The gap of the bright foil H in the joint portion of the obtained synthetic resin molding M could be suppressed to 0.1 to 0.15 mm.

[0034]

As shown and described above, according to the present invention, since the protruding portion generated on the outer peripheral surface of the joint portion is cut off at the same time when the molding terminal is welded, the molding work of this kind is considerably troublesome. The work can be simplified and the work can be simplified. Further, when the molding to be joined is a glitter foil molding, the gap of the glitter foil portion generated in the bonding portion of the molding can be suppressed to be extremely small, so that not only is the seam of the molding inconspicuous, but the fluororesin film There is no peeling or turbidity and the appearance can be treated beautifully.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a main part of an apparatus used in a method of joining terminals of a synthetic resin molding of the present invention.

FIG. 2 is a front view showing an example of a mold member according to the device of the present invention.

FIG. 3 is a front view showing the combined state.

FIG. 4 is a schematic side view of the device showing a state where the stopper is lowered.

FIG. 5 is a schematic side view showing the molding holding state.

FIG. 6 is a schematic side view showing a state in which the joined terminals of the molding are heated.

FIG. 7 is a schematic side view showing another example.

FIG. 8 is a schematic side view showing a molten state of the terminal.

FIG. 9 is a schematic side view showing the welded state.

FIG. 10 is an enlarged cross-sectional view of the relevant part.

FIG. 11 is an enlarged sectional view of an essential part of a joint portion of a synthetic resin molding obtained by the present invention.

FIG. 12 is an enlarged cross-sectional view of a joint portion of a molding showing an example of a conventional method of joining terminals of a synthetic resin molding.

FIG. 13 is a cross-sectional view showing another state.

[Explanation of symbols]

 10 Synthetic Resin Terminal Joining Device 10A Mold Member 10B Mold Member 20 Lower Mold Member 26 Coupling Mold Surface 27 Mold Blade 30 Upper Mold Member 35 Mold Holding Part 36 Coalescing Mold Surface 37 Mold Blade M Mold

Claims (2)

[Claims] 1. A step of heating a joined end of a synthetic resin molding to bring it into a molten state, and joining the joined end in the molten state, and integrally regulating the outer periphery of the joined portion with a die blade having a predetermined shape. A method for forming a terminal of a synthetic resin molding, which comprises a step of welding. 2. A mold holding part and a pair of mold members each having a fitting mold surface and capable of being fitted or separated from each other, wherein the mold member has a predetermined shape for defining the outer peripheral shape of the molding joining portion on the fitting mold surface. A terminal joining device for a synthetic resin molding, characterized in that