JPH01156048A - Method for providing connection means to wall part of hollow extrusion molded product - Google Patents

Abstract

PURPOSE:To form a connection means even to a continuous long article, by arranging the receiver connected from the mandrel of the die of an extruder by a rigid wire like body in a hollow extrusion molded product and providing a connection means with other member to the wall part of the hollow extrusion molded product in succession to extrusion molding by said receiver and an external press mechanism. CONSTITUTION:The receivers 65, 75 connected from the mandrel 22 of the die 2 of an extruder 1 by a rigid wire like body 10 are arranged in a hollow extrusion molded product 11 at a position where a predetermined cross-sectional shape is molded. In succession to the extrusion molding of the hollow extrusion molded product 11, connection means 12, 13 with other member are provided to the wall part of the hollow extrusion molded product by the receivers 65, 75 and the press mechanisms 62, 72 from the outside of the hollow extrusion molded product 11. By this method, the connection means can be formed even to a continuous long article.

Description

Detailed Description of the Invention - No. 1 This invention provides a method for providing a means for connecting to other members on the wall of a hollow extrusion molded product of semi-rigid or soft thermoplastic synthetic resin or rubber following extrusion molding. Regarding.

Soft solid or foamed synthetic resin or rubber materials used as sealing materials to maintain airtightness for the bonnets, trunk lids, doors, etc. of Shito Shiho automobiles, and sealing materials to prevent wind, rain, and dust from entering windows that open and close buildings. Hollow extrusion molded products are used. However, it is difficult to provide a coupling means such as a clip or a through hole for attaching the clip to the wall of such a flexible hollow extrusion because the hollow extrusion is easily deformed by pressure. Met.

In other words, in highly rigid hollow extrusion molded products that retain their shape under pressurized conditions such as drilling operations, such as vibrators made of hard vinyl chloride wood used as water pipes, it is possible to It is easy to create a through hole because the pipe will not be deformed by the pressure of the drilling tool, and if the amount of penetration of the drilling tool is determined appropriately, the drilling tool will cut the wall of the vibrator. After the through-hole is formed, the tip of the hole-drilling tool does not advance further and reach the other wall surface of the hollow molded product in front, so that the inner wall surface in front of the through-hole is not damaged.

However, since the hollow extrusion molded product used as a sealing material is semi-hard or soft, the hollow extrusion molded product is easily deformed and crushed by the pressure of the drilling tool, and its inner wall surfaces contact each other. After cutting to a predetermined length, a receiving material is inserted from the open end of the hollow extrusion molded product, the receiving material receives the tip of the drilling tool, and faces the inner surface of the wall where the coupling means is to be provided. I tried not to damage my inner self.

EIsS ''08 However, if the hollow extrusion molded product is long and the position where the through hole or the coupling means for the clip is provided extends to the center of the molded product, which is far from the open end, it is necessary to Inserting a material and drilling a hole from the outside is a cumbersome task, and if the hollow extrusion molded product is a continuous long product, it is impossible to insert a receiving material and it is not possible to provide a connecting means.

. . The method of providing a bonding means on the wall of a hollow extrusion molded product according to the present invention involves continuously manufacturing a hollow extrusion molded product made of semi-hard or soft thermoplastic synthetic resin or rubber material by extrusion molding. To do this, a receiver connected by a rigid linear body from the mandrel of the die of the extruder is placed inside the hollow extrusion molded product at a position formed into a predetermined cross-sectional shape, and the receiver and the hollow extrusion molded product are connected to each other by a rigid linear body. This method is characterized by providing a means for connecting to other members on the wall of the hollow extrusion molded product after the extrusion molding of the hollow extrusion molded product using a pressurizing mechanism from the outside, which solves the conventional problem. It is possible to solve the problem.

Further, as an embodiment of the above invention, the coupling means is provided with a female part represented by a through hole on the side of the hollow extrusion molded product, and a protrusion provided on the other member side is fitted into the female part to join the part. In some cases, a male part, such as a clip, is provided on the hollow extrusion molded product side, and the male part is fitted into a storage part provided on the other member side to be connected.

1-month The method of providing a coupling means on the wall of a hollow extrusion molded product according to the present invention is such that a receiver connected by a rigid linear body is extruded from a mandrel of a die of an extruder and has a predetermined cross-sectional shape. Since it is inserted inside the hollow extrusion molded product at the position formed in the hollow extrusion molded product, even if a knife or a clip, for example, is press-fitted from the outside of the hollow extrusion molded product toward the receiver using a pressure mechanism. Extrusion molding can be carried out without significantly deforming the hollow extrusion molded product and crushing the hollow extrusion molded product, and without damaging the inner surface facing the inner surface of the wall where the connecting means is provided with the tip of a hole drill or clip. A plurality of bonding means can be provided on the wall of the circumferential surface of the hollow extrusion in succession in the process.

Further, when the formed coupling means is a through hole, it becomes possible to insert and fix the clip as the coupling means by a second receiver further connected from the receiver by a rigid linear body.

Embodiments of the present invention will be described in detail with reference to the drawings. This embodiment is a specific example in which a hollow extrusion molded product is provided with a coupling means consisting of a through hole and a clip attached to the through hole.

FIG. 1 is a schematic side view showing an example of an apparatus for carrying out the present invention.

The soft thermoplastic synthetic resin hollow extrusion molded product material introduced into the extruder 1 is softened and melted within the machine, and then fed into the die 2 for forming the hollow extrusion molded product.

As illustrated in FIG. 3, the die 2 is similar to that used for extrusion molding of hollow extruded products such as vibrators, and mainly includes a die body 21. It is composed of a mandrel 22 and a die outer 23. The part A in Fig. 3 is the mandrel 22.
Figure 4 shows an enlarged view of the tip. As shown in FIG. 4, a through hole 24 is drilled in the mandrel 22 from the outside of the die 2 to the tip of the mandrel 22, and a through hole 26 is provided at the tip of the through hole 24. 25
A joint 27 is screwed through the . At the outer end of the joint 27, one end of the rigid linear body 10 is located inside the hollow extrusion molded product 11 (FIG. 1) and extends to a position where the coupling means is provided in the hollow extrusion molded product 11. It is installed.

The hollow extrusion molded product 11, which is still in a softened and molten state and extruded from the flow path formed by the die body 21, the die outer 23, and the mandrel 22, has a rigid linear body 1 in its hollow part.
0 into a predetermined shape using a sizing die 3, and then guided into a cooling water tank 4 and cooled.

The cooled hollow extrusion molded product 11 is sandwiched between a pair of upper and lower caterpillar conveyor belts 51 and 52 of the take-off device 5 and taken off at a constant speed. At this time, since the hollow extruded product 11 is flexible, it deforms when it is compressed by the caterpillar conveyor belts 51 and 52, and it may become impossible to take it off at a constant speed, or it will be completely compressed and the hollow extruded product 11 will not recover. It can be crushed to the extent possible. For this reason, as shown in FIG. 5, a slide bearing 53 is inserted inside the hollow extrusion molded product 11 at a position where it is pinched by the caterpillar conveyor belts 51, 52. The slide bearing 53 is fixedly held in the middle of the rigid linear body 10 extending from the tip of the mandrel 22. This slide bearing 53 is similar to a ball bearing inserted between a guide boss and a bushing of an injection mold, and has steel balls 55 loosely embedded around a frame 54.
Since the outermost surface of each steel ball 55 is along the inner surface of the hollow extrusion molded product 11, the hollow extrusion molded product 1
To prevent changes in the external shape, internal shape, or wall thickness of a hollow extrusion molded product due to variations in the take-up speed of step 1.

The hollow extrusion molded product 11 that has left the take-off device 5 is processed by a drilling device 6 for forming a through hole therein, a mounting device 7 for inserting a clip into the through hole, and a cutting device for cutting it into a predetermined length. It is sequentially sent to the cutting device 8. Those devices6,7
．． 8, the hollow extrusion molded product 11 is placed in a predetermined position by the carriages 63, 73, 83 that are movable back and forth in the extrusion direction and the locking tool 6.
1, 71, and 81, and while moving at the same speed as the take-up speed of the take-off device 5, drilling, mounting, and cutting operations are performed. When those operations are completed, the locking tool 61,
71.81 is released, and each carriage 63°73.83 automatically returns to its original position and waits.

In the drilling device 6, as shown in FIG. 6, there is a receiver 65 held by a rigid linear body 10 inside the moving hollow extrusion molded product 11, and a receiving surface 66 of the receiver 65 is present.
A drilling tool 64 located outside the hollow extrusion molded product 11 toward
is lowered by the operation of a pressure mechanism consisting of a fluid pressure cylinder 62, and an elongated through hole 12 is bored in the wall of the hollow extrusion molded product 11 (FIG. 7). A receiving surface 6 is provided on the outer peripheral surface of the receiving tool 65.
Steel balls 6 are similar to the slide bearing 53 except for 6.
8 is loosely fitted and buried, and the hollow extrusion molded product 11 is prevented from being soaked by the clamping pressure by the cart 63 and the locking tool 61, and the hollow extrusion molded product 11 is smoothly moved. Reference numeral 69 denotes a through hole that vertically traverses the receiving tool 65 in the extrusion direction. To stabilize the shape of a hollow extrusion molded product 11 without expanding it under pressure or reducing it by reducing compression.

The mounting device 7 is a device similar to the hole drilling device 6, and has a receiver 75 (see FIG. )
The clip holder 74 on the outside of the hollow extruded product 11 is lowered toward the receiving surface of the receiver 75 by the action of the fluid pressure cylinder 72 as a pressurizing mechanism, and the hollow extruded product 11 is penetrated. Insert the tip of the clip 13 into the hole 12 inside the hollow extrusion molded product 11, and roughly rotate it 90' on a plane perpendicular to the insertion direction to insert the clip 13 into the through hole 1.
Attach it to 2.

The cutting device 8 is a device that cuts the hollow extrusion molded product 11 into a predetermined length using a rotary blade 82.

By the operations described above, from semi-hard or soft materials,
The hollow extrusion molded product 11 can be extruded and its wall portion can be continuously provided with means for connecting with other parts. The hollow extrusion molded product 11 provided with the coupling means in this way can be attached to another member by fitting the protrusion of the clip 13 into the through hole of the other member 14, as shown in FIG. It can be fixed to the member 14 of.

The semi-hard or soft material used in this invention is a material for a flexible hollow molded body that does not have self-retention properties and is deformed by pressure when providing coupling means such as holes or clips. , various thermoplastic synthetic resins, thermoplastic elastomers, rubber 11 vulcanized with a crosslinking agent, etc. can be used. In the case of rubber that requires vulcanization, it is necessary to provide a continuous vulcanization device before or in place of the cooling process of the hollow extrusion molded product 11 using the cooling device 4.

In the above embodiment, the hollow extrusion molded product 11 has a through hole 12 as a female part and a clip 13 as a male part fitted into the coupling means. It is sufficient to simply provide a through hole 12 such as a hole or an oblong hole, and a multi-purpose eyelet with a transparent hole to protect and strengthen the surrounding area of the through hole 12 is installed at the same time as drilling or by the next installation device 7. You can also do that.

If a clip with an eyelet-like function whose tip expands when pressure is applied is used as a coupling means as a male part, the male part will be attached to the wall surface of the hollow extrusion molded product 11 by press-fitting the clip. coupling means may be provided.

In addition, in the example, the case where the coupling means is provided at one place of the hollow extrusion molded product 11 was described in detail, but the hollow extrusion molded product 11
It is also possible to provide a predetermined number of them at predetermined positions on the circumferential surface.

The rigid linear body 10 used in the present invention is preferably a steel wire such as a piano wire, but may also be a flexible one such as a chain cane.

Since the rigid linear body 10 is always under tension as the hollow extruded body 11 moves, a material whose length changes is not suitable.

In the above embodiment, the rigid linear body 10 was fixed to the mandrel 22 at one open end of the through hole 24 at the tip of the mandrel 22; This can also be done through the opening 28 (FIG. 3) on the outer circumferential side. In this case, the rigid linear body lO to which various parts are not attached is passed through the through hole 24 from the opening 28 and inserted up to the tip of the mandrel 22, and when extrusion of the hollow extrusion molded product 11 is started, the rigid linear body lO The linear body 1O is fed out, and the slide ring 53 and receivers 65 and 67 are successively connected, and their outer peripheries are successively covered with the extruded hollow extrusion molded product 11. When the rigid linear body lO is extended to a predetermined position, its end is fixed to the outer peripheral surface of the die 2. In this way, the slide bearing 5 is placed inside the hollow extrusion molded product 10.
3 and the receivers 65 and 75 can be easily positioned.

Furthermore, in the embodiment, the outer peripheries of the slide bearings 53 and receivers 65 and 75 located inside the hollow extrusion molded product 11 in the pulling device 5, the hole drilling device 6, and the mounting device 7 are subjected to a lubrication treatment such as a fluororesin coating. The steel balls 55 and 68 may not be used when the Furthermore, even if the hollow extrusion molded body 11 is deformed by the pinching force in the pulling device 5, the slide bearing 53 may be removed without making the pulling speed unstable, or if the hollow extruded body 11 is restored to its original shape after the pressure is removed.

Advantageous Effects The method of providing a coupling means on the wall of a hollow extruded product according to the present invention is such that a receiving device connected by a rigid linear body is extruded from a mandrel of a die of an extruder, and a hollow extruded product of a predetermined shape is extruded from the die. A cutter or clip is inserted into the inside of the hollow extrusion molded product at the position formed in the extrusion molded product, and is used to provide a coupling means by a pressurizing mechanism from the outside of the hollow extrusion molded product toward the receiver. Even if the hollow extrusion molded product is press-fitted, the hollow extrusion molded product will not be greatly deformed and the hollow extrusion molded product will not be crushed, and the inner surface of the wall facing the inner surface of the wall where the connecting means will be provided will not be damaged by the tip of a hole drill or clip. The wall of the hollow extrusion can be provided with a bonding means without the need for a hollow extrusion process.

Conventionally, when a hollow molded product is long and the connecting means such as a through hole or clip is provided in the center away from the open end, a receiving material is inserted inside the hollow molded product and cut from the outside. Making holes is a troublesome work, and if the hollow extrusion molded product is a continuous long product, it is impossible to insert a receiving material, and the problem that it was not possible to provide a connecting means could be solved. .

In addition, when the formed coupling means is a through hole of the female part, the amount is further extended from the tool by the rigid linear body.
Since it is possible to insert and fix the male clip as a coupling means using the receiver, various types of male and female coupling means can be provided on the hollow extrusion molded product.

Furthermore, in this invention, the flexible hollow extrusion molded product is always moved at a constant speed during each process of taking off, forming a bonding means, and cutting, and each process can be performed at a precise position, so that it can be fully automated. is also easy.゛

[Brief explanation of the drawing]

Fig. 1 is a schematic side view showing an example of an apparatus for carrying out the present invention; Fig. 2 is a side view showing the positions of various members inside the hollow extrusion molded product shown in Fig. 1; Figure 3 is a vertical cross-sectional view of the die cut in the extrusion direction, Figure 4 is an enlarged vertical cross-sectional view of section A in Figure 13, Figure 5 is a vertical cross-sectional view of the slide ring, and Figure 6 shows the drawing device and cutting. 7 is a cross-sectional view of a hollow extrusion molded product provided with through holes, and FIG. It is a cross-sectional view showing a state in which the members are fixed. 1... Extrusion [2... Die 10... Rigid linear body 11... Hollow extrusion molded product 12... Coupling means (female part) 13... Coupling means (male part) 1
4...Other parts 22...Mandrel 6
2.72...Pressure mechanism 65.75...Receiver agent Patent attorney Norio Hoshino Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (3)

[Claims] (1) When continuously manufacturing hollow extrusion molded products made of semi-rigid or soft thermoplastic synthetic resin or rubber material by extrusion molding, extrusion A receiver connected by a rigid linear body is arranged from the mandrel of the die of the machine, and by the receiver and a pressurizing mechanism from the outside of the hollow extrusion molded product, the hollow extrusion molded product is 1. A method for providing a connecting means on a wall of a hollow extruded product, comprising providing a connecting means to another member on the wall of the extruded product. (2) A method for providing a coupling means on a wall of a hollow extrusion molded article according to claim 1, wherein the coupling means provided on the wall of the hollow extrusion molded article is a female part. (3) A method for providing a coupling means on the wall of a hollow extrusion molded article according to claim 1, wherein the coupling means provided on the wall of the hollow extrusion molded article is a male part.