JPH07205306A - Method and apparatus for processing synthetic resin molding - Google Patents

Abstract

PURPOSE:To accurately, simply and efficiently perform the processing of a synthetic resin molding by performing the processing of a notched part simultaneously with the bonding of the terminal of the synthetic resin molding. CONSTITUTION:A process holding one terminal E1 among both terminals to be bonded of a synthetic resin molding on a fixing side 20 and the other terminal E2 among them on a movable side 30 and melting both terminals under heating to integrally unify and weld them and a process performing the processing of the synthetic resin molding at a predetermined time of the unification and welding of the terminals of the synthetic resin molding are provided.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art For example, when mounting a rear window of an automobile, an annular synthetic resin molding made of a string-shaped extruded product having a predetermined cross section and a predetermined length is used.

When mounting a rear window with this synthetic resin molding, as shown in FIGS. 8 and 9, since the molding fin portion L for concealing the gap with the body surface abuts a body part such as a clip, the fin. A cutout portion C is formed at a predetermined position of the portion L. Then, after forming the cutout portion, the molding M is bent into a window frame shape and both ends thereof are melted by heat or the like and joined to form an annular shape. As shown in FIG. 8, the joint M of the annularly joined molding M has its joint J at the center portion C of the window glass.
It is mounted so as to be located at the lower edge of L. Reference numeral G in FIG. 9 denotes a glass fitting groove portion of the synthetic resin molding.

By the way, when the cutout portion C is cut off, the position of the molding M is preliminarily determined. However, in the above method, since the molding end is melted and heat-bonded after the cutout portion C is cut off, the dimensional position of the molding end from the terminal end is changed at the time of joining and the cutout portion C is changed.
Is likely to be displaced, and the molding may interfere with a clip or the like when mounted on the vehicle body. Further, in this method, the step of cutting out the cutout portion and the step of joining the molding ends are performed separately, so that there is a problem that the number of processing steps increases and it is not efficient.

[0005]

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve such a problem, in which the ends of the synthetic resin molding are joined and at the same time the cutouts and the like are processed. An object of the present invention is to provide a method and apparatus for processing a synthetic resin molding, which enables the processing of the seed synthetic resin molding to be performed accurately, simply and efficiently.

[0006]

That is, the present invention is
Holding one of the terminals to be joined of the synthetic resin molding on the fixed side and the other on the movable side, heating and melting both terminals to join and weld them integrally, and when joining and welding the terminals, The present invention relates to a method for processing a synthetic resin molding, including a step of processing the resin molding at a predetermined position.

Further, according to the present invention, a fixed-side member that holds one end of a synthetic resin molding and a movable-side member that holds the other end of the synthetic resin molding and moves with respect to the fixed-side member. The fixed-side member and the movable-side member respectively include a mold member that joins both ends of the synthetic resin molding that have been heated and melted and welded together, and a cutting process of a notch at a predetermined position of the synthetic resin molding. The present invention relates to a processing device for a synthetic resin molding, which is provided with a cutter device for performing the above.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings. 1 is a side view showing an example of a processing apparatus for a synthetic resin molding of the present invention, FIG. 2 is a perspective view showing an example of a cutter apparatus, and FIGS. 3 to 7 are views showing an example of a processing method of the present invention. FIG. 3 is a diagram showing a positioning process of both ends of the synthetic resin molding, FIG. 4 is a diagram showing a heating and melting process of both ends of the molding, and FIG. 5 is a diagram showing a welding process of both ends of the molding.
FIG. 6 is a cross-sectional view of the die member in the welding process, and FIG. 7 is a diagram showing a process of cutting the notch of the molding.

First, as described above, in the method for processing a synthetic resin molding shown in the above, one of the joined terminals of the synthetic resin molding is held on the fixed side and the other is held on the movable side, and both terminals are heated. The method is characterized by including a step of melting and contacting and integrally welding, and a step of processing the synthetic resin molding at a predetermined position when the terminal is welded and welded. Hereinafter, an example in which a notch portion at a predetermined position of the synthetic resin molding is cut and processed according to a specific device will be described.

The processing apparatus 10 shown in FIG.
And a fixed side member 20 and a movable side member 30 attached to the machine base 11, and the movable side member 30 is movable so as to approach or separate from the fixed side member 20 by the cylinder device 12. It is configured.

The fixed side member 20 and the movable side member 30 are
Both ends E1 and E2 of a single synthetic resin molding M are respectively held, and the terminals m of the synthetic resin molding that are heated and melted are bonded to each other.
Mold members 40 and 50 for welding 1 and m2, and cutter devices 60 and 7 for forming notches at predetermined positions of the molding.
It has 0 and 0 respectively.

First, the fixed-side member 20 will be described. The mold member 40 of the fixed-side member 20 has a terminal m to be joined at one end E1 of the synthetic resin molding M which has been melted in advance.
1 for holding and joining and integrally welding with the welded end m2 of the other end E2 held by the die member 50 of the movable side member 30 described later, and the lower die member 41 and the upper die It has a member 42. The lower mold member 41 and the upper mold member 42
Are formed so that they can be integrally clamped and fixed by a pressing member 43. Reference numeral 44 is a cylinder device for vertically moving the pressing member 43. A groove to which a synthetic resin molding M is fitted is provided on the joining mold surface between the lower mold member 41 and the upper mold member 42, and the molding end portion E1 has the lower mold member 41. And the upper mold member 42.

The cutter device 60 of the fixed member 20 is provided at the rear of the mold member 40, and cuts the fin portion of the synthetic resin molding M held by the mold member 40 at a predetermined position. The cutter device 60 includes a lower blade member 61 fixedly mounted on the machine base 11 and an upper blade member 62 that moves up and down with respect to the lower blade member 61.

The lower blade member 61, as shown in FIG.
Mold holding portion 63 for holding the synthetic resin molding M and blade portion 6
4 and. As shown in FIG. 2, the molding holding portion 63 is formed in a groove shape having a U-shaped cross section, for example, and the synthetic resin molding M has a fin portion L cut off on the upper surface 65 of the molding holding portion 63. As it is placed, it is fitted and fixed in the molding holding portion 63.

The blade portion 64 is provided in a predetermined position on the upper surface 65 in a predetermined shape, and cuts a predetermined position of the fin portion L of the molding with the upper blade member 62 described below. It should be noted that the blade 64 is provided at a predetermined portion which is measured and positioned right and left from the joint portion when the joint portion of the molding terminal is arranged at the center of the lower edge of the window glass.

The upper blade member 62 is formed in a position and shape corresponding to the blade portion 64, and can be moved forward and backward (moved up and down) with respect to the lower blade member 61 by a driving device such as a cylinder device 66 as shown in FIG. Is attached to. The upper blade member 62 cuts the fin portion L arranged on the upper surface 65 into a predetermined shape by slidingly contacting the blade portion 64 of the lower blade member 61. The cutter device 60 includes the mold members 40, 5
0 operates while the end to be joined of the synthetic resin molding is welded and welded, and a predetermined position of the molding is cut and processed.

On the other hand, the movable side member 30 holds the other end E2 of the synthetic resin molding M, and the fixed side member 20.
Similarly, the mold member 50 and the cutter device 70 are provided.
The movable member 30 as a whole is configured to be movable with respect to the fixed member 20 by a driving device such as a cylinder device 12 provided on the machine base 11. Movable side member 3
Since the mold member 50 and the cutter device 70 of 0 have the same structure as the mold member 40 and the cutter device 60 of the fixed-side member 20 described above, the fixed-side member 2 will be described here.
The description of 0 replaces the description of the movable member 30. Figure 1
2, reference numeral 51 is a lower die member, 52 is an upper die member, 53 is a holding member, 54 is a cylinder device for moving the holding member 53 up and down, 71 is a lower blade member, 72 is an upper blade member, 73 Is a molding holding portion, 74 is a blade portion, and 76 is a drive device such as a cylinder device for moving the upper blade member 72 up and down.

Next, the processing method by the above apparatus will be described. First, as shown in FIGS. 1 and 3, one end E1 side of the synthetic resin molding M is fixed to the fixed side member 20 by the molding holding portion 63 of the fixed side member 20 and the mold member 40.
Hold on.

On the other hand, the other end E2 of the synthetic resin molding M
Similarly, the side is held on the movable side member 30 by the molding holding portion 73 of the movable side member 30 and the mold member 50.
When holding the synthetic resin molding M, the movable side member 30
Is separated from the fixed-side member 20 by a predetermined distance, but the mold member 40 and the movable-side member 3 of the fixed-side member 20 are separated from each other.
The stopper 13 is arranged in the middle of the mold member 50 of 0, and the joined terminals m1 and m of the synthetic resin molding M are attached to the stopper 13.
By abutting the end faces of 2, the synthetic resin molding M
The lengths of the joined terminals m1 and m2 at both ends E1 and E2 can be set equal. Stopper 13
Is disposed between the mold members 40 and 50 by a driving device such as a cylinder device 14 so as to be movable back and forth.

Next, as shown in FIG. 4, the mold member 4
The stopper 13 retracts from 0 to 50, and during this time,
The heat source 15 is moved forward. The heat source 15 is made of an iron plate or the like having a heater built therein and is heated to a predetermined molding melting temperature. In this example, the temperature is adjusted to about 250 ° C to 290 ° C. Further, hot air having an appropriate temperature may be used depending on the material and thickness of the molding. Reference numeral 16 is a heat source 1
It is a drive device such as a cylinder device for moving the 5 forward and backward.

After that, both terminals m to be joined of the molding M are joined.
1, m2 is brought into contact with the heat source 15. If necessary,
The movable member 30 may be advanced to the fixed member 20 side. Both jointed terminals m1 and m2 of the molding M are appropriately heated by a timer or the like to be in a molten state. In addition,
The melting amount of both the terminals m1 and m2 to be joined of the molding M is appropriately determined depending on the material and thickness of the molding to be joined, and is 1.0 to 1.5 mm in this example.

The terminals m1 and m2 to be joined are heated by a heat source 15.
It is also possible to melt in a non-contact state without directly contacting with. As a result, thermal deformation of the terminals of the molding can be suppressed, and the appearance of the product can be further improved. In that case, the temperature of the heat source 15 is 60
It is set from 0 ° C to 800 ° C.

When the terminals m1 and m2 to be joined of the molding are melted by a predetermined amount, the heat source 15 is moved to the mold members 40, 5
While moving backward from 0 to return to the predetermined standby position, the movable side member 30 advances toward the fixed side member 20, and the die member 40 and the die member 50 are pressed against each other. The state is shown in FIG. As a result, the melted terminals m1 and m2 held by the respective mold members 40 and 50 are brought into contact with each other and welded together. The time for welding the terminals m1 and m2 to be joined of the molding M is appropriately determined depending on the material of the molding, the melting amount, etc.
It takes seconds.

As will be understood in detail from FIG. 6, the mold surfaces of the respective mold members 40, 50 which are pressed against each other by the advance of the mold member 50 are located on the lower mold member 41 side of the mold member 40 side. A mold blade 47 is provided on the mold blade 46 and the upper mold member 42 side. The lower die member 51 of the die member 50 is provided with a die blade 56, and the upper die member 52 is provided with a die blade 57. The die blades 46, 47 and 56, 57 are for defining a predetermined outer peripheral shape of the molding, and are brought into contact with or abutted with each other by joining with the other die member, and the melted ends m1, m2 of the molding to be joined. The outer peripheral shape is regulated to the original shape of the molding while pressure bonding is performed, and the protruding portion n is cut and removed.

In this embodiment, the lower mold member 4
Since the mold surfaces of 1,51 define the molding design surface of the molding,
The die blades 46, 56 are preferably provided with an acute tip and a clearance between one die member and the die blade is as small as possible, and in this embodiment, it is set to 0 mm. As a result, the protruding portion n on the design surface side of the molding joint portion is accurately cut and removed while the outer peripheral shape is regulated by the mold blades 46 and 56, and has a smooth and good appearance.

At this time, the die blade 4 is formed by the attachment of die members.
In order to prevent the damage of the lower mold member 6 and 56,
On the mold surface of 1,51, there are ridge-shaped protection blocks 48, 58.
Are formed. The reference numeral 49 is the mold blades 46, 5
It is a dent that allows the protruding portion n of the molding cut by 6 to escape.

The mold blades 47, 57 of the upper mold members 42, 52 which define the non-designed surface of the joint portion of the synthetic resin molding.
Has a large clearance as compared with the die blades 46 and 56.

Both terminals m to be joined of the upper synthetic resin molding M
During welding (and cooling) of 1, m2, the cutter device 6
0 and 70 actuate to cut the notch C at a predetermined position of the synthetic resin molding. That is, the upper blade members 6 of the cutter devices 60 and 70 shown in FIGS.
2, 72 are actuated by the drive devices 66, 76, and descend in the direction of the lower blade members 61, 71, respectively. Then, the upper blade members 62, 72 and the blade portions 64, 74 of the lower blade members cut out at predetermined positions of the fin portion L of the synthetic resin molding M held by the fixed side member 20 and the movable side member 30. The cutting process of the part C is accurately cut.

[0029]

As shown and described above, according to the processing method and apparatus of the present invention, it is possible to join and weld the ends of the synthetic resin molding and simultaneously perform processing such as cutting at a predetermined position. Therefore, the process required for processing the molding can be rationalized and the production efficiency can be improved. Further, since the cutting and the like are processed by the cutter device arranged at a predetermined position measured from the welding position of the molding, the processing accuracy is extremely high and a good product can be obtained.

[Brief description of drawings]

FIG. 1 is a side view showing an example of an apparatus for processing a synthetic resin molding of the present invention.

FIG. 2 is a perspective view showing an example of a cutter device.

FIG. 3 is a diagram showing a step of aligning both ends of the synthetic resin molding.

FIG. 4 is a diagram showing a heating and melting process of both ends of the molding.

FIG. 5 is a diagram showing a welding process of both ends of the molding.

FIG. 6 is a cross-sectional view of a mold member in a welding process.

FIG. 7 is a diagram showing a process of cutting a notch portion of a molding.

FIG. 8 is a plan view schematically showing a general synthetic resin molding mounted on the rear window.

FIG. 9 is a partially cutaway perspective view showing a main part thereof.

[Explanation of symbols]

 10 Processing device 11 Machine stand 12 Cylinder device 20 Fixed side member 30 Movable side member 40,50 Mold member 60,70 Cutter device

Claims (3)

[Claims] 1. A step of holding one of the terminals to be joined of a synthetic resin molding on a fixed side and the other on a movable side, heating and melting the both terminals to join and weld them integrally, and joining of the terminals A method for processing a synthetic resin molding, comprising a step of processing the synthetic resin molding at a predetermined position during welding. 2. The method of processing a synthetic resin molding according to claim 1, wherein the processing at a predetermined position of the synthetic resin molding is cutting of a notch. 3. A fixed member that holds one end of a synthetic resin molding, and a movable member that holds the other end of the synthetic resin molding and that moves with respect to the fixed member, The fixed-side member and the movable-side member respectively include a die member that joins the heated and melted ends of the synthetic resin molding and welds them together, and a cutter device that cuts a notch at a predetermined position of the synthetic resin molding. An apparatus for processing a synthetic resin molding, characterized in that