JPH02158319A - Method and apparatus for removal of burr of synthetic resin blow-molded product - Google Patents

Abstract

PURPOSE:To perform a burr removing work of a complicated shape by injecting hot gas of thermoplastic resin meltable temperature from a fine nozzle to bring the injected gas into contact with a burr to be removed, protruding from a synthetic resin blow-molded product and the edge of the molded product, and sequentially melting the root of the burr to remove it. CONSTITUTION:A shaft 11 is held by hands or placed on the arm B of a working robot A, a flame injected from a nozzle 10 is approached toward the edge of the burr D of a blow-molded product C, the root of the burr D is melted by the flame, the nozzle 10 is sequentially moved along the edge of the burr D, the burr D is separated from the molded product C, and all the burrs D are removed. The moving speed of the nozzle 10 depends upon the thickness of the burr D and the material of the molded product. The molded product C of the part separated from the burr D becomes smooth by the fluidity of the melted resin, and is sequentially solidified as it is separated from the flame.

Description

DETAILED DESCRIPTION OF THE INVENTION 10 Objects of the Invention (Industrial Field in which the Invention is Applied) This invention relates to an apparatus for removing protruding burrs from synthetic resin blow-molded products.

(Prior art) Conventionally, this type of burr was removed from blow-molded products by using a press-type burr removal device in the product mold while the product was still hot and soft, or immediately after the molded product was released from the mold. The blow molded part is manually cut out with a knife while it is still hot and soft.

(Problem to be Solved by the Invention) However, the prior art described above is good when there are few burrs in the part to be removed or when the shape is simple, but when there are total burrs or when the shape is complicated, it is difficult to punch out the burrs. The cost of the mold is high, and the die cannot be punched out accurately, and the part after punching is not smooth. Furthermore, since the latter method is done by hand, there are imperfections in the work, and labor costs increase.

In recent years, some experimental models have been seen on the market in which a knife is mounted on the arm of a work robot in place of the latter manual operation, but the knife must always be operated with the cutting edge at the front when the robot is operated. However, the general-purpose work robot at the time of this application does not have such a function, and furthermore, since the knife has a wide blade, it is not possible to perform fine deburring work.

Therefore, if a robot capable of performing such complicated tasks is employed, the cost required for the robot will be extremely high, making it impractical.

SUMMARY OF THE INVENTION Therefore, the present invention provides the market with a method and apparatus that allow easy deburring work, produce a clean and efficient product after deburring, and that can be easily carried out using a general-purpose work robot. The purpose of this invention is to make it possible to deburr complex shapes that have been difficult to mechanize in the past by combining them with 1 to 1.

Configuration of the Invention (Means for Achieving the Object) In order to achieve the above-mentioned object, the present invention jets heated gas at a temperature at which a thermoplastic resin can be melted from a thin nozzle, and uses the jetted gas to mold a synthetic resin blow-molded product. A method for removing burrs from a synthetic resin blow-molded product, characterized in that the burr to be removed protruding from the burr is applied to the molded product, and the bases of the burrs are successively melted and removed.

Furthermore, in order to achieve the above object, in the method for deburring a synthetic resin blow molded product, the heated gas is
In some cases, it is characterized by heated air at temperatures ranging from o'C to 850°C.

Further, in order to achieve the above object, in the method for deburring a synthetic resin blow molded product, the heated gas is a gas obtained by ejecting fuel gas from the nozzle and burning it outside the nozzle. In some cases.

In order to achieve the above object, the method for deburring a synthetic resin blow-molded product may be characterized in that the combustion gas is hydrogen gas.

Furthermore, in order to achieve the above object, in the method for deburring a synthetic resin blow-molded product, the diameter of the gas flow ejected from the heated gas nozzle is 0°3 to 5 m, and the flow velocity is 2 m/+nil to 30 m. /min.

In addition, in order to achieve the above-mentioned object, a thin gas ejection nozzle that opens in the axial direction is provided at the tip of the pen-shaped shaft, and a heated gas ejected from the nozzle is installed inside the shaft or on a member connected to the shaft. A deburring device for a synthetic resin blow-molded product is provided with a heating gas or fuel gas supply source for supplying a heating gas or a fuel gas, and is characterized by a filter.

In order to achieve the above object, the apparatus for deburring synthetic resin blow-molded products may be characterized in that the heating gas supply source is a device comprising a blower and a heater.

In order to achieve the above object, the apparatus for deburring synthetic resin blow-molded products may be characterized in that the heated gas jetting nozzle is a gas burner.

Further, in order to achieve the above object, in the deburring device for synthetic resin blow-molded products, a thin waste ejection nozzle that opens in the axial direction is provided at the tip of the pen-shaped shaft,
A gas supply source for supplying the fuel gas ejected from the nozzle is provided in the shaft portion or a member connected thereto.The deburring device for synthetic resin blow molded products is a robot arm that can move freely in three-dimensional space. It may also be characterized by being mounted so that it can be tilted freely.

Further, in order to achieve the above object, in the deburring device for synthetic resin blow molded products, the inner diameter of the nozzle is 0.
In some cases, it is characterized by being 3 to 1.2 nn.

(Function) In order to carry out the method invention of claim 1 using the apparatus of claim 6, heated gas is jetted out from a thin nozzle, or fuel gas is jetted out from the nozzle, and the heated gas is jetted out from the nozzle. When the gas combusted outside the nozzle is applied to the burr to be removed and moved, the base of the burr is melted by the heat of the gas flow, the burr and the molded product are separated, and the burr is removed. The parts of the molded product that have been deburred become smooth due to the flow of the molten resin, and as the molded product moves relative to the area hit by the gas flow, the parts where the burr has been removed are gradually removed from the heated gas atmosphere and exposed to the surroundings. Cooled and solidified by air.

When carrying out the method described in claim 2 using the apparatus described in claim 7, the air is heated to 400°C to 850°C by a heater.
The heated air is supplied to the nozzle section using a blower, and the heated air is jetted out from the nozzle.

In the case of a method using the apparatus according to claim 8 and using combustion gas obtained by burning fuel gas as the heating gas according to claim 3, the fuel gas or fuel gas generated by a gaseous fuel generator as the fuel gas supply source. The same gas cylinder is used.

Further, when using the apparatus according to claim 8 and using hydrogen gas as the combustion gas according to claim 4, hydrogen gas is supplied from a hydrogen gas cylinder or a device that decomposes hydrogen from water, and the hydrogen gas is supplied outside the nozzle. This is burnt to produce a combustion gas, and this combustion gas is used.

In the method according to each of the above-mentioned claims, in the method according to claim 5, the nozzle opening is set to 0.3 to 1.2 nn, and the heated gas ejected in this range is ejected at a rate of 2 m/min to 30 m/min.
The burr is sprayed at a flow rate of /min.

In the apparatus according to claim 9, the shaft portion of the nozzle is attached to the tip of the arm of a robot which can freely change direction, and the movement of the deburring work of the molded product is memorized in advance in the working robot, and the above-mentioned Any one of the methods set forth in each of claims 1 to 5 is carried out.

In each claim of the device invention, in which the inner diameter of the nozzle is set to 0°3 to 1.5 mm, a narrow heated gas jet stream or burning gas stream can be easily obtained.

(Example) Representative examples of these inventions will be described.

Example 1 The device shown in FIG. 1 is a typical example of the device invention of claims 6, 7, 9, and 10,
The reference numeral 10 in the figure is a heated gas ejection nozzle, the diameter of which is 0.3 to 1.5 m, preferably about 0.3 to 1.0 m, and is detachably mounted on the shaft part 11. 1
The shaft portion 11 has a gas passage connected to the nozzle 10 and is connected to a hydrogen gas generator 13 by a hose 14. Gas supply amount or gas pressure adjustment knob 1
5 and an air mixture amount adjustment knob 16 are provided. The input section of these adjusting devices may be a digital type such as a keyboard. As the hydrogen gas generator 13, a device that electrolyzes water was used.

The above-mentioned nozzles 10 usually have 2 to 5 different inner diameters.
Various types are available, and you can select and use the one with the inner diameter that suits your purpose.

Operation of Example 1 The operation of the apparatus of this example is an embodiment of the method according to claims 1, 3 to 5 above, in which the hydrogen gas generator 3 is first operated. , adjust the gas supply amount or gas pressure adjustment knob 15 and the air mixture amount adjustment knob 16 to the optimum values, select the nozzle 10 according to the purpose, and adjust the shaft portion 11.
When the hydrogen gas ejected from the nozzle is ignited,
It becomes a thin flame and its temperature is about 1500' at the highest point.
C to 3000°C. Also, the diameter of the flame is the same as that of the nozzle 1.
Although it varies depending on the inner diameter of the nozzle 10, the shape of the nozzle tip, the gas supply amount and gas pressure, and the mixing ratio between air and oxygen, within the range in which the nozzle 10 of the above embodiment is used, it is approximately 0.3 mm to 5 mm. The range is .

Then, holding the shaft part 11 in hand or mounting it on the arm B of the working robot A, direct the flame ejected from the nozzle 10 close to the burr D of the blow-molded product C, and remove the burr D. The base is melted by the flame, and the nozzle 10 is sequentially moved along the edge of the burr D to separate the burr D from the molded product C and remove all the burr D. The moving speed of the nozzle 10 described above varies depending on the thickness of the burr D and the material of the molded product, but is preferably 3 cm/see to 7 an/sec.

The part of the molded product C separated from the burr D becomes smooth due to the flow of the molten resin, and gradually solidifies as it separates from the flame.

Although hydrogen gas was used as the fuel gas in this example, the use of other acetylene gas, propane gas, or city gas is also included in the examples of the method of this invention.

In addition, devices using these gas cylinders can also be used as equipment 1. included in the embodiments of the invention.

Embodiment 2 This is shown in FIG. 2, and is an embodiment of claims 6, 7, and 10, and the same reference numerals as in Embodiment 1 indicate the same structural members or parts. It has the effect of

The difference is that the heating gas supply source consists of an air heating device 20 and a blower 24, and the air heating bag is attached to the inside of the shaft portion 11 or to a member that is integrally fixed thereto. 20 is provided, and an air chamber 21 communicating with the nozzle 10 is normally equipped with, for example, an infrared lamp and a honeycomb-shaped ceramic heater 22 to constitute the air heating device 20. Air at 400℃ to 850℃
The air blower 24 is installed in a stationary part separate from the shaft part 11, and is connected to the air heating device 20 through a hose 25.

Effects of Embodiment 2 The effects of Embodiment 2 are examples of claims 1 and 2.

First, the power of the air heating device 2o is turned on, and electric current is passed through the electric wire cable 26 routed along the hose 25 to the heater 22 to heat the heater 22.

Next, when the blower 24 is operated, the air sent from the blower 24 into the air heating chamber 2o is heated therein, and the heated air from the nozzle 10 to about 400°C to 800°C (
Gas) is ejected as a stream.

At this time, the length of the heated air flow at the above temperature is 1-5 m to 30 m.
mn, and the diameter of the added air flow is 0.3 to 51 mm.
Make it about m1.

In this way, the rest is carried out manually or by using the work robot A, as in the case of the flame in Example 1. The moving speed of the nozzle 10 is lower than that of Example 1 because the temperature of the heated air is lower.
Move at a slower speed than this.

Effects of the Invention Since the method is constructed and operated as described above, first of all, in the method invention of claim 1, burrs on the blow molded product can be easily removed, and in particular, the nozzle has a cutter-like structure in the direction of movement. Since there is no directionality, it is possible to easily and efficiently remove burrs with intricate, intricate shapes.

Furthermore, the molded product in the area where the burr has been removed becomes smooth and has a clean finish, eliminating the need for finishing processes such as conventional cutting with a cutter, and simplifying the deburring process.

In the method of claim 2, since the heating gas used is air, no toxic gas is generated during the work.

In the method described in claim 3, high-temperature gas can be easily obtained.

In the method using hydrogen combustion gas as set forth in claim 4, high-temperature gas can be easily obtained, and only water is produced after combustion, which does not harm the working environment.

In the method using the heated gas flow having the thickness described in claim 5, it is possible to easily remove burrs that are narrow and have a finely embedded shape.

In the apparatus invention set forth in claim 6, the methods set forth in claims 1, 2, and 3 can be carried out, and the apparatus is simple in structure and hardly breaks down.

In the seventh aspect of the invention, since heated air is used, no toxic gas is generated.

In the apparatus according to claim 8, since the nozzle is a gas burner for burning fuel gas, high-temperature gas can be easily obtained and workability is good.

In the apparatus according to claim 10, since the nozzle diameter is small, a narrow heated gas flow can be easily obtained, finely embedded burrs can be removed, and the heat capacity of the entire heated gas flow can be reduced, so that blow molding is possible. There is no risk of thermal distortion or blowing out of the product.

In the apparatus according to claim 9, since the nozzle portion for ejecting the heated gas mentioned above is mounted on the arm of the working robot, once the working procedure is memorized, the working can be carried out repeatedly and efficiently. In addition, since the robot arm can freely change the direction of inclination, the nozzle is tilted to correspond to the direction of the burr, and heated gas is sprayed when the burr is created in that area, making it unnecessary to change direction like a cutter. This makes it easy to control the robot's motion.

The blow molded products that are the object of this method and apparatus are ideal for removing burrs from engineering plastic molded products that are difficult to cut with a cutter.

(Effects Unique to the Embodiment) Since the apparatus of Embodiment 1 uses hydrogen gas as the fuel gas and is equipped with the hydrogen gas generator 13, there is no need to refill the hydrogen cylinder, and furthermore, the amount of combustion gas is approx. 1500℃
The temperature is as high as 3000'C, and the burr D of the blow-molded product C can be removed easily and quickly, resulting in high efficiency.Furthermore, after combustion, it becomes water, does not generate toxic gas, and does not become a source of pollution.

In addition, since the hydrogen gas generator 13 uses a device that decomposes water into hydrogen and oxygen by electrolysis, the hydrogen gas can be used as a fuel gas and the oxygen can be used as a combustion improver.

Further, since the hydrogen gas generator 13 is provided with a supply amount or pressure adjustment knob 15 and an air mixture amount adjustment knob 16, the size of the flame can be adjusted as desired.

Since the device of Example 2 simply heats and injects air, there is no risk of explosion.

Since both embodiments 1 and 2 are mounted on the arm of a working robot, they can work efficiently.

[Brief explanation of the drawing]

The drawings show typical embodiments of the device invention in this application, with FIG. 1 being a perspective view of Embodiment 1, and FIG. 2 being a vertical sectional side view of the air heating device portion of Embodiment 2. and FIG. 3 are cross-sectional views of a molded product showing an example of deburring work. Main symbols in the figure 10... Nozzle 11... Shaft part 13...
・Hydrogen gas generator 14...Hose 15...Gas supply amount or gas pressure adjustment knob 16...
・Air mixture amount adjustment knob 20...Heating device 24...Blower 24...
...Blower A...Robot, B...Arm, C...
... Molded product, D...Flash. Patent applicant Placoh Co., Ltd.

Claims (1)

[Claims] 1) A heated gas at a temperature at which the thermoplastic resin can be melted is ejected from a thin nozzle, and the ejected gas is applied to the molded product and the burr protruding from the synthetic resin blow-molded product to remove the burr. A method for deburring a synthetic resin blow-molded product, the method comprising sequentially melting and cutting off the base of the product. 2) The method for deburring a synthetic resin blow-molded product according to claim 1, wherein the heated gas is heated air at a temperature of 400°C to 850°C. 3) The method for deburring a synthetic resin blow-molded product according to claim 1, wherein the heated gas is a gas obtained by ejecting fuel gas from the nozzle and burning it outside the nozzle. 4) The method for deburring a synthetic resin blow-molded product according to claim 3, wherein the combustion gas is a hydrogen gas combustion gas. 5) The diameter of the gas flow ejected from the heated gas nozzle is 0.3 to 5 mm, and the flow velocity is 2 m/min to 30 m/min. , a method for deburring a synthetic resin blow-molded product according to item 3 or 4. 6) A thin gas ejection nozzle that opens in the axial direction is provided at the tip of the pen-shaped shaft, and a heating gas or fuel that supplies heated gas ejected from the nozzle is placed inside the shaft or a member connected to the shaft. A deburring device for synthetic resin blow molded products, characterized by being equipped with a gas supply source. 7) The apparatus for deburring synthetic resin blow-molded products according to claim 6, wherein the heating gas supply source is a device composed of a blower and a heater. 8) The deburring device for a synthetic resin blow-molded product according to claim 6, wherein the heated gas jetting nozzle is a gas burner. 9) A thin gas ejection nozzle opening in the axial direction is provided at the tip of the pen-shaped shaft, and a gas supply source for supplying the fuel gas ejected from the nozzle is provided inside the shaft or a member connected to the shaft. Synthetic resin blow molding according to claim 6, characterized in that the provided deburring device for synthetic resin blow molded products is mounted on a robot arm that can freely move in a three-dimensional space so as to be freely tiltable. Product deburring device. 10) A deburring device for a synthetic resin blow molded product according to claim 7, 8 or 9, wherein the nozzle has an inner diameter of 0.3 to 1.2 mm.