JPS59123639A - Extrusion molding of skid-proof material - Google Patents

Abstract

PURPOSE:To obtain a skid-proof material in which a soft resin is strongly bonded to a metal part by a method in which a hot-activated type adhesive is coated on the surface of a metal base, which is heated by a high-frequency induction heating to activate the adhesive and then supplied to the extrusion head of a resin extruder. CONSTITUTION:A skid-proofing layer 2 composed of a soft synthetic resin is strongly bonded to the step portion of a metal base 1 of a nearly L-shaped section, consisting of a step portion 3 and a kick-up portion 4, to manufacture a skid-proof material A. In this case, a hot-activated type adhesive (e.g., of acrylic type, rubber type, etc.) is coated on the surface of the step portion 3 of the metal base 1 and quickly and uniformly heated in a high-frequency induction heater 9, and the metal base 1 with the bonding activity is supplied to the extrusion head 11 of an extruder for a soft synthetic resin (e.g., vinyl chloride resin, urethane resin, etc.) to bond the adhesive portion with the soft synthetic resin.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing, by extrusion molding, a bevel 11-me 4A that is used by being attached to a corner of a staircase. 1. It has a step part fixed to the tread of all steps and a riser part fixed to the riser surface of the stairs,
This invention relates to extrusion molding of a slip-preventing material in which a slip-preventing layer made of soft synthetic resin is provided on two surfaces of a metal stand having an oval-shaped cross section.

The anti-slip material used is attached to the corner of the stairs.
In addition to its anti-slip function, which actively prevents slipping on stair treads, it also has a buffer protection function against unexpected accidents such as falls and heel trips, especially at the corners of stairs.
However, since stairs are frequently subjected to pressure when going up and down, it is necessary to securely attach them to the corners of the stairs.

The anti-slip material must also protect the corners of the stairs and prevent them from becoming rounded and slippery.

Therefore, in the conventional heel stopper, a metal base having a tread portion and a riser portion and formed into an abbreviated cross-section has a tread stopper layer made of synthetic resin on the top surface of the tread portion. , the tread portion is placed on the tread of the stairway, and the riser portion is placed on the riser surface of the stairway,
In the old style, which fixed each step to protect the corners of each rung, a non-slip material was used that exerted the anti-slip function and the protective function by the anti-slip layer provided on the surface of the tread. .

As one type of anti-slip material, all units are formed by extrusion molding of aluminum, etc., or bending molding of steel, stainless steel, etc., and the shear-preventing layer is formed by extrusion molding of soft synthetic resin. The entire base and the anti-slip layer, which are formed separately, are bonded together using an adhesive using a means such as a press.

However, metals and soft synthetic resin layers generally tend to have poor adhesion, and when using soft vinyl resin for the anti-slip layer, the plasticizer contained in this resin may cause the adhesive to deteriorate. Due to the limited number of types, it is difficult to firmly bond the base and the anti-slip layer, and the coefficient of thermal expansion between the base made of metal and the anti-slip layer made of synthetic resin is significant. Due to the difference in temperature, there is a large difference in expansion and contraction due to changes in temperature, and the anti-slip layer is not suitable for all machines during toilet use.
Accidents of soil falling often occurred because it was not done properly.

As a means of solving this problem, for example, instead of using a flexible material, an anti-slip layer made of hard rubber or synthetic resin is formed by press molding on the surface of all machines. At the same time as forming the anti-slip layer, this anti-slip layer can be attached to the surface of all the tables, or locking protrusions and through holes can be provided on the sides of all the tables, and the surfaces of all the tables can be press-molded. Then, an anti-slip layer is formed, and the locking protrusion is buried in the layer, or a piece of synthetic resin for the anti-slip layer is put into the through-hole, thereby making it possible to secure both sides. Efforts are also being made to strengthen the bond.

However, even if such a method is employed to strengthen the adhesiveness of the locking protrusions, through holes, etc. in terms of GTF, it has not been possible to improve the adhesive strength as a whole.

In addition, the molding equipment becomes larger, and it is not possible to manufacture the stairwells according to the law stipulated by the molding equipment. In the case of the anti-slip layer, which requires a high quality coating, the yield is poor and the manufacturing cost is high, which is a molding problem, and the surface of the anti-slip layer becomes hard.・The protective effect of the buffering effect of the stop shrine was lost, resulting in a lack of safety.

Therefore, as a manufacturing method 7 of such a Zuhari IJ-me shrine, adhesive is applied to the surface of the entire metal base, the entire base is introduced into the extrusion head of the extrusion mill, and the entire base is inserted into the extrusion head of the extrusion mill. Extrusion molding may be considered, in which the anti-slip layer is shaped by extrusion molding.

However, in this method, when the synthetic resin melted in the extrusion head is deposited on the surface of all the machines, if the temperature of all the machines is low, the adhesion to all the machines will decrease and the adhesion to the machines will be insufficient. In addition to being unable to obtain adhesive strength, the synthetic resin was rapidly cooled, making it impossible to sufficiently improve shape and dimensional accuracy.

Therefore, in this molding method, it is necessary to heat all the machines to the melting temperature of the synthetic resin or close to the melting temperature of the synthetic resin before entering the extrusion head.

However, it is technically difficult to heat all the tables uniformly and rapidly just before they enter the extrusion head, and moreover, all the tables used as anti-slip sections have a cross section with a step part and a riser part. Because it has a letter-shaped asymmetrical cross-sectional shape, it may warp or deform when heated, resulting in even greater shape and dimensional errors, making it unusable as an anti-slip material.

The present invention was invented in view of this point of view,
The entire metal platform, which has a tread section and a two-legged part and is shaped like an abbreviated cross section, has an anti-slip layer made of soft synthetic resin on the top surface of the tread section by extrusion molding. It is firmly adhered within the extrusion head, and this prevents the anti-slip layer from peeling off from the entire machine during use.Furthermore, it is formed as long as possible during manufacturing to improve product yield. Regarding the manufacturing method of anti-slip material that can reduce the manufacturing cost as well as reduce the manufacturing cost, heat-activated adhesive is applied to the upper surface of the tread of all the stands on which the soft synthetic resin layer is formed. By placing all the treated units into the alternating magnetic field of a high-frequency induction heating device, all units are rapidly heated while preventing deformation, and the adhesive on the surfaces of all units is rapidly and uniformly heated. Activate the adhesive, maintain the molten state for a certain period of time, enter the entire unit into the extrusion head of the extrusion material, and activate the upper surface of the step part within this extrusion head. The present invention provides an extrusion molding method for an anti-slip material, which forms an anti-slip layer by adhering a molten soft synthetic resin to a surface coated with an adhesive.

EMBODIMENT OF THE INVENTION Hereinafter, the extrusion molding method of the anti-slip material based on this invention is demonstrated in detail based on the Example shown in an accompanying drawing.

In FIG. 1, the anti-slip material (A) manufactured by the method of the present invention is shown, and the anti-slip material (A) is shown in FIG.
) consists of a whole platform (1) that is fixed to cover the corners of the staircase from the tread to the riser surface, and an anti-slip layer (2) that is fixed to this whole platform (1) to provide an anti-slip function. It is made up of.

The above-mentioned whole platform (1) is formed by extrusion molding of aluminum or the like or bending molding of steel, stainless steel, etc. to have an abbreviated cross-sectional shape, and has a tread part (3) fixed to the tread of the stairs;
The step part (4) is fixed to the riser surface of the stairs, and the step part (3) is formed with a plurality of fine irregularities (5) in the longitudinal direction of its lower surface.

In addition, the anti-slip layer (2) is made of a soft synthetic resin such as vinyl chloride resin or urethane resin.
) is formed into a band shape leaving a thin mounting piece (6) on the trailing edge side on the Jz surface, and has a stopper part (7) with uneven stripes on its two sides. It is formed.

Figure 2 shows an example of the manufacturing process for manufacturing the anti-slip material <A), in which a certain amount of all units C1) cut into appropriate dimensions are sequentially applied to an adhesive coating device. Acrylic, rubber, etc. selected according to the type of synthetic resin to be used as the anti-slip layer (2) on the top surface of the step section (3) of the entire platform (1) (not shown). After applying a heat-activated adhesive and removing the solvent trapped in the adhesive,
The feed roller (8) rapidly heats the insertion base (1) in the alternating magnetic field of the high-frequency induction heating device (9) to a temperature at which thermal activation of the adhesive takes place. The extrusion head ( 1
1) Insert inside. In this extrusion head (II), the synthetic resin that will become the slip-stopping layer (2) is discharged onto the upper surface of the tread portion (3), and the discharge pressure is used to press the adhesive layer and form it into one piece. .

Furthermore, the extrusion head (11) is pulled out and the cooling device (1
After cooling in Step 2), the anti-slip material (A) is pulled out using a tension roller (13), and cut into a predetermined length using a cutting device (not shown) to form a product.

The entire platform (1) is formed to a fixed length that does not cause any inconvenience in handling, usually 4 to 6 meters, and the top surface of the tread section (3) has a A heat-activated adhesive is applied to the area where the stop layer (2) is to be glued.

After drying the adhesive applied to the upper surface of the step section (3), the entire platform (1) is continuously inserted into the alternating magnetic field of the high frequency induction heating device (9) by the feed roller (8).

In this high-frequency induction heating device (9), when a metal is placed in an alternating magnetic field, an induced current flows through the metal, and the electric resistivity of the metal and the induced current generate heat due to Joule heat and hysteresis loss. This is an application of the principle that the metal generates heat by itself, and the specific resistance and conductivity of the metal, the operating frequency of the induction heating device,
The heat generation state changes depending on the heat dissipation state, the shape of the coil, the distance and mutual position between the coil and the metal, etc., and by selecting these appropriately, it is possible to control the temperature to a constant temperature. There are seven things that can be heated.

In particular, by carefully selecting the distance between the coil and the metal, the mutual positional relationship, and the shape of the coil, the alternating magnetic flux becomes uniform, and the temperature distribution throughout the metal is uniform, generating heat locally. It is possible to prevent distortion and warping due to excessive heat generation, and at the same time, activate the adhesive uniformly.

In the method of the present invention, heating using this high frequency induction heating device (9) has extremely important significance.

In other words, in order to activate the heat-activated adhesive applied to the tread surface (3) of all the stands (1), the adhesive must be heated to its heat activation temperature, such as adhesive or acrylic. It is usually necessary to heat it to about 220 to 230°C if it is a product, but in this case, it is necessary to heat all the machines (1) at the same time, and all the machines (1) have a cross-sectional path ■ 1 character-shaped asymmetric 1 In the case of a curved shape, it is difficult to heat it uniformly and rapidly using a heating method using a normal heating furnace or heater, and warping or deformation may occur.

Therefore, it becomes impossible to insert the extruder (10) into the extrusion head (11), or even if it is possible, the entire inserted unit (1) will cause friction with the mold of the extrusion head (11). However, this caused problems in extrusion molding of the anti-slip layer (2), and moreover, the shape of the anti-slip layer was not formed accurately. In addition, heating with a normal heating furnace has poor thermal efficiency and consumes a lot of energy. In addition, it takes a long time to heat the adhesive to the thermal activation temperature, and extrusion molding continuously prevents slipping. If A) is to be manufactured, the speed of all machines (1) running on the production line must be slowed down, or the heating area of all machines (1) on the production line must be lengthened.

On the other hand, heating by the high frequency induction heating device (9)
In addition to accurate heating temperature control, it enables rapid and uniform heating, especially uniform heating in the cross-sectional direction of the entire unit (1), thereby solving the above problems at once.

In order to uniformly heat all the units (1) above, all units (1) must be heated uniformly.
1) It is desirable to control the high frequency induction heating device (9) so that it always accurately passes through a predetermined position within the alternating magnetic field of the high frequency induction heating device (9). As a means for this purpose, it is possible to install guides, rollers, etc. on the entrance and exit sides of the alternating magnetic field of the high-frequency induction heating device (9), respectively.For example, as shown in FIG. In the alternating magnetic field formed by the induction coil (14), a guy 1' (15,
) and regulate the position of all units (1) using this chi' (+5).

The high-frequency induction heating device (9) generates self-heating in all units (1), and the heat from all units (1) heats the heat-activated adhesive applied to the Jz surface of the tread portion (3). After the extruder (C1) is turned into 1 liter, as shown in
0) is inserted into the extrusion head (11), and the anti-slip layer (2) is formed.

At this time, it is necessary to maintain the active state of the adhesive by the heated whole machine (fl), and the crystal frequency induction carp carp machine (d) (9゛・niru) is required to maintain its active state. The heating temperature of
Bring the adhesive to a temperature that can maintain its life state, and press it after leaving the high-frequency induction heating device (9).
1) Until it is inserted inside? The final decision will be made after considering M degree low and high.

In this extrusion spatula l' (l l ), the molten synthetic t
The fd fat is discharged onto the tread part (3 row surface) of all units (1), merges with the -1- side of the heated and activated adhesive, and in its molten state is combined with the synthetic 1t5J fat and adhesive. The tread portions (3) are fused together and glued in place on the surface, and passed through an extrusion mold (11) to form a predetermined cross-sectional shape.

In this case, all the stands (1) receive the discharge pressure of the synthetic resin on one side of the step part (3), so the bottom side of the step part (3) is
In order to ensure smooth flow of the entire platform (1) and to prevent damage to the entire platform (1) or the extruder (11) due to friction, uneven lines are provided on the bottom surface of the tread section (3). (5) to reduce the contact area between the entire machine (1) and the mold.
It is advantageous to add stiffness or lubricant.

Molten synthetic resin molding and molded anti-slip layer (
It is important to simultaneously adhere 2) to all the units (1) in order to obtain sufficient adhesive strength when using the non-slip material < A). It is possible to increase the resistance to the failure point of the anti-slip layer (2).

Anti-slip material (A
) is cooled to room temperature by a cooling device (12). Stopping rate (Δ) cooled by cooling device (12)
is pulled out by a tension roller (13). This tension roller (13) is formed to a fixed size in all units (]), so when the feed roller (8) installed in front of the high-frequency induction heating device (9) is no longer able to feed it, this Instead of the feed roller (8), the anti-slip material (8) is pulled out.

The stopper kA' (A
) is a non-slip layer (2) formed on one side of the tread portion (3) of the entire platform (1).Since it is formed by extrusion and is continuous, the entire platform ([) is ” cut according to the law
and become a product.

In addition, as shown in FIG.
Isn't it limited to the type with a part of the top surface covered with scratches or anti-stick layer (2)?
＼In order to demonstrate the stopper function, the 7-foot foot section (3
) has an anti-slip layer on a part of one side,
For example, as shown in Figure 5, the second part (4)
Those with a hem stopper layer (2) that extends to the surface, as shown in Figure 6, have a hem stopper layer (2) that does not extend over the entire surface of the foot (3) of the entire platform (1). ), as shown in Figure 7, the tread section (3) and the foot section (4
) has an edge-stopping layer (2) that does not cover the entire surface.

Furthermore, the cross-sectional shape of the anti-skid layer (2) is not limited to the shape shown in FIG. 1 and FIGS. It can be formed into a cross-sectional shape, for example, the corner part that forms the tread part (3) and riser part (4) of the whole platform () in order to improve the anti-slip function and add a cushion function. There are some that have a bulging part.

According to the present invention, since the adhesive layer is directly heated and activated by all units that generate self-heating by induction heating, the activated, so-called melted adhesive layer is heated in all directions (this flow i-
y to make the coating thickness uniform, and to reduce the number of surfaces on all machines (
Adhesive flows into the extremely small recesses in the hole, fills in the unevenness of application, and fixes C (further enhances the anchoring effect after bonding and bonding the entire unit with the synthetic resin). In addition, the adhesive part 11 layer (induced force 11 is activated by heat, and is extruded into the extruder 1).
21111 people are pressurized by the discharge pressure of the first molten synthetic resin, and the mixture is combined / 1! JIT' Lo and JIT' Lo
The entire base is pierced to make the anchoring effect even more effective (this is because the synthetic resin is glued and shaped into one piece). This results in a product that prevents the peeling phenomenon and withstands repeated use over a long period of time.

In addition, all the units used generate heat from the l'l sound If by the action of the alternating magnetic flux generated by the flowing coil while inducing a high frequency current, so the local temperature - J, There is no increase in force, heat is generated uniformly throughout the entire body, and the process is carried out rapidly.There is extremely little distortion or warping of 4γ", and there is no hindrance to extrusion. Prevents scratches inside the material during extrusion.
Since it is fed smoothly and at a constant speed, the molding error of the synthetic resin (slip prevention layer) that is attached to the machine, the difference in size, It is possible to extremely reduce the waving phenomenon and produce a sagging hem stopper with uniform product value.

Furthermore, the process of applying heat-activated adhesive to all units of a fixed size, heating all units using high-frequency induction heating, and bonding all units with synthetic resin in an activated state is carried out in succession. This enables continuous production using extrusion molding, increasing production efficiency and significantly reducing production costs.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a hem stopper manufactured by the method of the present invention, Fig. 2 is an explanatory diagram showing the manufacturing process according to the method of the present invention, and Fig. 3 is a diagram for explaining the induction heating device of Fig. 2. FIG. 11 is an explanatory view for explaining the extrusion head of FIG. 1, and FIGS. 5 to 7 are perspective views showing examples of other stoppers 1 manufactured by the method of the present invention. (Δ)...Slip prevention oil, (1)...All units, (2
)... Anti-slip layer, (3)... Step portion, (11)
... Riser part, (9) ... High frequency induction heating device, q■
...Extrusion 1, (month)...Extrusion head.

Claims (1)

[Claims] It is formed into an abbreviated shape in cross section with a step part and two kick parts,
In addition, a metal base with adhesive applied to two sides of the tread J1 is inserted into the extrusion head of the extruder, and inside the extrusion head, a soft synthetic resin mold is placed on the upper surface of the tread J1. In the extrusion molding method of the anti-slip IJ that adheres the anti-slip layer, a heat-activated adhesive is applied to the top surface of the tread portion of all the above units, and all the units are placed within the alternating magnetic field of a high-frequency induction heating device. 11. Introduce the heat-activated adhesive to heat rapidly and uniformly. 1. An extrusion molding method for non-slip adhesive A characterized in that the entire unit is entered into an extrusion head to form a soft synthetic resin while maintaining the activity of this adhesive. .