JPH02222745A - Equipment for mixing and spreading adhesive - Google Patents

Abstract

PURPOSE:To obtain an admixture of an additive and an adhesive having an arbitrary ratio by interposing a reduction driving mechanism between both single side of the discontinuous driving mechanisms of a quantitative type rotary pump and a rotary pump type spreader and a driving source. CONSTITUTION:The discontinuous driving mechanisms 12, 13 such as an electromagnetic clutch brake are connected to a quantitative type rotary pump 6 and a rotary pump type spreader 10 respectively so that both supply of the pump 6 and spreading action of the spreader 10 can be discontinuously controlled. Furthermore the set feed amount of an adhesive supplied by the pump 6 is reduced at arbitrary amount for the set spreading amount of the admixture of the adhesive spread by the spreader 10 and an additive. Therefor a reduction driving mechanism 15 such as a variable reduction gear is interposed between single side of the discontinuous driving mechanisms 12, 13 and a driving source 14 such as a motor so that the additive of an additive tank 17 is sucked only at the volume difference into a mixing circuit 5 and both the adhesive and the additive can be mixed at an arbitrary ratio. As a result, the admixture of the additive and the adhesive can be obtained at the arbitrary ratio.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention provides additives such as curing agents, An adhesive mixing and dispersing device used for intermittently applying a mixture prepared by mixing predetermined amounts of additives such as a crosslinking agent and an extender to a bonded area, This type of mixing and dispersing device was developed mainly for application to a device for applying adhesive to wide plate-shaped bodies such as veneer veneers in the manufacturing process of veneer plywood.

[Conventional technology]

The conventional technology of preparing a mixture by mixing predetermined amounts of additives such as curing agents with adhesives such as urea resin, involves stirring and mixing predetermined amounts of adhesive and additives while artificially measuring them in advance. A so-called two-component pre-mixing means is used to prepare a mixture, and the adhesive and additives are transported separately to a mixing tank using a metering pump such as a plunger pump, and then mechanically stirred and mixed using a rotary mixer, etc. to form a mixture. So-called two-component pre-mixing means for the preparation are well known.

Further, as a conventional technique for intermittently applying the mixture of adhesive and additive prepared above to the bonded area, a roll-type application means such as a roll spreader comprising a coating roll and a squeezing roll is well known.

(Problems to be Solved by the Invention) The prior art pre-mixing means for preparing a mixture by mixing a predetermined amount of an additive such as a curing agent with an adhesive such as urea resin in a predetermined amount at a time requires a worker; It is not suitable for automated processes because it is always limited by the pot life of the adhesive, and the prior art two-component mixing means is also an open mixing tank for mixing and stirring the adhesive and additives directly into the coating process. Since conventional methods were equipped with a rotary mixer and an open roll spreader for applying the mixer to the bonded area, there was no stagnation in the open parts of these devices or in the maze-like flow channels. After the pot life has elapsed, the admixture gradually sticks to the area, making it difficult to continue the smooth application process, and it also cannot be easily removed with cleaning water or the like.

In order to eliminate the disadvantages of the above-mentioned conventional device for mixing and applying adhesives and additives, the present invention provides an open section in which right-handed elements and left-handed elements are alternately orthogonally connected in multiple stages in a pipe. A static mixer with a simple structure without any labyrinth-like retention points in the flow path performs high-frequency mixing and stirring operations, for example tens of thousands of times or more.
By adjusting the volume difference by variable speed operation of a metering type rotary pump and a rotary pump type spreader connected to the front part of the static mixer, suction mixing of additives in a controlled ratio is fed into the static mixer. This is a two-component immediate mixing type that is configured so that a mixture of arbitrary ratio can be obtained by applying the action, and the #2 mixture can be uniformly spread in a fabric-like manner directly onto the top surface of a wide-width coating object from a sprayer. The purpose of this project is to develop a new adhesive mixing and dispersing device that can be applied to various types of adhesives.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a right-handed element and a left-handed element in a pipe so that a mixture can be produced by mixing and stirring supplied adhesives such as urea resin and additives such as a curing agent. A mixing circuit is provided with static mixers connected in multiple stages in alternating orthogonal directions, and then a gear pump is installed on the inlet side of the static mixer so as to be able to supply an adhesive such as YURI 7 resin stored in an adhesive tank. An adhesive supply circuit equipped with a metering type rotary pump such as the above is provided, and then an additive such as a curing agent stored in an additive tank can be supplied to the inlet side of the static mixer,
An additive supply circuit is provided on the inlet side of the static mixer, and then a mixture of an adhesive such as urea resin and a seasoning agent such as a curing agent is added to the outlet side of the static mixer in the form of a plate such as a veneer veneer. This is an adhesive mixing and dispersing device, which is equipped with a mixture dispersing circuit equipped with a rotary pump type dispersing machine so as to be able to distribute it in a warm cloth form on the upper surface of the body, and has the following structural requirements.

a) An intermittent electromagnetic clutch brake or the like is connected to each of the fixed house type rotary pump and the rotary pump type distribution so that the supply and spraying operations of the metering type rotary pump and the rotary pump type sprayer can be controlled intermittently. The drive mechanism has been connected.

b) By reducing the set supply volume of the adhesive by the metering type rotary pump by a desired amount with respect to the set spraying rate of the mixture of adhesive and additive by the rotary pump type sprayer, A deceleration drive mechanism such as a variable speed reducer is interposed between one side of the intermittent drive mechanism and a drive source such as a motor so that the additive can be sucked into the mixing circuit and mixed at an arbitrary ratio.

[For production]

Since the present invention is configured as described above, the adhesive such as urea resin stored in the adhesive tank is brought to an appropriate pressure by an adhesive supply circuit equipped with a metering type rotary pump such as a gear pump, for example, several kg/kg. The mixture is pressurized to below crit and supplied to the inlet side of a mixing circuit equipped with a static mixer, and an additive such as a curing agent stored in an additive tank is further supplied to the inlet side of the mixing circuit. A high-frequency mixing and stirring action of tens of thousands of times or more is performed in a static mixer using, for example, more than 10 right-handed and left-handed twisting elements connected in series to perform a mixing and stirring action of 2 to the power of the elements. A mixed and agitated mixture of adhesive and additives is generated while passing through the static mixer, and is then used in the next stage of a rotary pump type sprayer, such as a rotary pump with a structure in which a pair of wide impellers are housed in a casing. Transfer by suction using a type spreader. In addition, the next stage rotary pump type sprayer is operated under a low extrusion pressure of several kg/C11 or less, where the flow path is opened without closing it using an on-off valve or a throttle valve, etc. A mixture of adhesive and additives is directly and intermittently extruded, and the additive-containing adhesive is evenly applied to the top surface of a plate-like object such as a veneer veneer that is conveyed by a conveyor directly below. In order to enable spraying and application, the rotation of the rotary pump type sprayer is controlled intermittently by an intermittent drive mechanism such as an electromagnetic clutch brake or a vacuum clutch brake, and the rotation Reducing the set supply amount of the adhesive by the metering type rotary pump by a desired amount with respect to the set amount of spraying of the adhesive and additive mixture by the pump type spreader, for example, 101/man. By reducing the supply amount to a set supply rate of, for example, about 8 to 91/m, the additive is sucked into the mixing circuit by the difference in capacity, that is, by 1 to 2 J/min, and optionally, for example, 1 Can be mixed at any ratio of about 0.01 to 0.2 to 1.
A deceleration drive mechanism such as a variable speed reducer is interposed between one side of the intermittent drive mechanism and a drive source such as a motor, and the metering type rotary pump and the rotary pump type spreader are differentially operated, for example. When the rotation speed of the rotary pump type sprayer is set to 60 Orpm, the rotation speed of the metering type rotary pump is set to 480 Orpm.
The mixing ratio of the adhesive and the additive is differentially controlled by variable setting within a range of about 540 rl) m.

〔Example〕

A basic embodiment of the adhesive mixing and dispersing device according to the present invention is as shown in FIG. The static mixer 4 is constructed as shown in FIG. 2 so that the additives such as the curing agent are introduced into the inlet side of the static mixer 4 and mixed frequently while passing through the vessel. A right-handed twist element 2 with a length of about 40 m is placed inside a stainless steel pipe 1 with a diameter of about 20 mm.
and left-handed twisted elements 3 are alternately orthogonal, usually 10
Since it is configured by connecting several or more pieces in series in multiple stages, the mixing and stirring frequency can reach tens of thousands of times or more, which is 2 times the number of elements. Also, the adhesive tank 1 introduced into the inlet side of the static mixer 4
The adhesive stored in the static mixer 6 is supplied to the inlet side of the static mixer 4 from an adhesive supply circuit 7 at an appropriate pressure by a metering type rotary pump 6 such as a gear pump, mono pump, or vane pump as illustrated in FIG. Several kg/ct
The drive shaft of the metering type rotary pump 6 is equipped with an intermittent drive mechanism 12 such as an electromagnetic clutch brake or a vacuum clutch brake that can freely control intermittent drive so as to be able to supply intermittently at a low discharge pressure of less than tt. Furthermore, the additives such as a curing agent stored in the additive tank 17 introduced into the inlet side of the static mixer 4 are configured to be directly supplied into the mixing circuit 5 from the additive supply circuit 8. There is.

On the other hand, on the exit side of the static mixer 4, there are a pair of wide impellers 18a, 18 as illustrated in FIG.
10 is directly connected to the rotary pump type dispersion structure in which b is housed in the casing 19, and the mixture of adhesive and additives generated in the static mixer 4 is converted into a number! J
/ c/j
The rotary pump type sprayer 10 is equipped with an intermittent drive mechanism 13 such as an electromagnetic clutch brake, a vacuum clutch brake, etc., which can be controlled intermittently, on the drive shaft of the rotary pump type sprayer 10 so that the coating can be applied evenly over the entire surface in a cloth-like manner. One side of the intermittent drive mechanism 12.13, such as the electromagnetic clutch brake or the vacuum clutch brake, which controls the intermittent drive of the metering type rotary pump 6 and the rotary pump type spreader 10, for example, the intermittent drive mechanism 12. A deceleration drive mechanism 15 such as a variable speed reducer is interposed between a drive source 14 such as a motor, and the rotation speed of the rotary pump type sprayer 10 is controlled to 60, for example.
When set to 0 rpm, the rotational speed of the metering type rotary pump 6 is decelerated to a range of about 480 to 540 ppm, and the set spray amount of the mixture of adhesive and additive by the rotary pump type number 15110 is - For example, when it is 1012/min, the set supply rate of adhesive by the metering type rotary pump 6 is set to be reduced to about 8 to 91/man, and the amount is reduced by the difference in capacity, that is, 1 to 21/man. The additives are sucked into the static mixer 4, and the curing speed and the like are controlled at a freely adjustable mixing ratio, for example, about 1:0.1 to 1:0.2. It is configured such that mixtures of adhesives and additives can be arbitrarily produced with various adhesive conditions such as adhesive strength and adhesive cost.

In addition, the intermittent drive machine 171t12°13 and the deceleration drive mechanism 1 are used for intermittent drive and variable deceleration drive of the metering type rotary pump 6 and the rotary pump type spreader 10 in the present invention.
5, and instead of the common drive source 14, for example, a DC servo motor, an AC servo motor, etc. is directly mounted on each of the metering type rotary pump 6 and the rotary pump type sprayer 10, and the intermittent operation can be performed. It is also capable of supporting drive and variable deceleration drive.

〔Effect of the invention〕

As explained above, the present invention is a star with a simple structure in which right-handed elements and left-handed elements are alternately orthogonally connected in a pipe and there are no labyrinth-like snowdrifts in the flow path. The capacity is achieved through the high-temperature mixing and stirring action of the static mixer, for example tens of thousands of times or more, and the variable-speed operation of the fixed-rate rotary pump and rotary pump-type spreader connected before and after the static mixer. By adjusting the difference, the additives fed into the static mixer can be suction-mixed in a controlled ratio to obtain a mixture of any desired ratio, and can also prevent solids and dust from entering the adhesive, which are normally likely to be introduced. Under intermittent drive control using a rotary pump-type spreader that is resistant to contamination, and low extrusion pressure that does not use on-off valves or throttle valves, it is possible to
I! This is an adhesive mixing and dispersing device that is configured to uniformly spray additive-containing adhesive directly onto the upper surface of a wide plate-like object in a fabric-like manner over the entire surface from 15 spray gates under a low extrusion pressure of less than i. This not only eliminates the drawbacks of conventional two-liquid pre-mixing means, which require workers and have a limited pot life, making them unsuitable for automated processes. In the case of liquid pre-mixing means, the mixture gradually hardens after the pot life has elapsed in the open part of the i-vessel or in the retention area of the flow path formed like a labyrinth, making it difficult to continue the smooth coating operation, and It was able to eliminate all the inconveniences such as the inability to easily remove it with washing water, etc., and it is especially useful as a device for applying adhesive to veneer veneers, etc. in the manufacturing process of veneer plywood, etc. We were able to achieve functional results.

[Brief explanation of the drawing]

The figures show an example of the implementation of the present invention, in which Fig. 1 is a layout diagram of the entire device, Fig. 2 is a partially cutaway side view of a static mixer, and Fig. 3 is a cutaway side view of a metering type rotary pump. FIG. 4 is a partially cutaway side view of the rotary pump type spreader. DESCRIPTION OF SYMBOLS 1... Pipe, 2.3... Element, 4... Static mixer, 5... Mixing circuit, 6... Metering type rotary pump, 7... Adhesive supply circuit, 8... - Additive supply circuit, 9... Plate body, 10... Rotary pump type sprayer, 11... Mixture spray circuit, 1, 2, 13.
... Intermittent drive mechanism, 14... Drive source, 15... Deceleration drive mechanism. Patent Applicant Hashimoto Electric Industry Co., Ltd. Figure 2 Figure 3 Procedure Neighborhood Official Letter (Voluntarily Submitted) Commissioner of the Patent Office Yoshi 1) Moon Takeshi 1, Indication of the Case 1999 Patent Application No. 44415 (3) Specification "Desired" written on page 7, line 1 and page 8, line 19 is corrected to "arbitrary." Address: 5-1-174 Nitta-cho, Takahama City, Aichi Prefecture, ``Claims'' column and ``Detailed Description of the Invention'' column of the specification subject to amendment. 5. Contents of amendment (1) The scope of claims in the specification will be amended as shown in the attached sheet. (2) "Prior" written on page 4, line 3 of the specification is amended to read "two-liquid prior." 2. Scope of Claims A mixing circuit (5) equipped with a static mixer (4) in which a right-handed element (2) and a left-handed element (3) are alternately orthogonally connected in multiple stages in a pipe (1). ) and an adhesive supply circuit (
7>, an additive supply circuit (8>) that supplies additives such as a curing agent to the mixing circuit (5), and a mixture of the adhesive and additives discharged from the mixing circuit (5) to the veneer plate. An adhesive mixing and dispersing device consisting of an admixture dispersing circuit (11) equipped with five rotary pump-type units (10) for dispersing in a poultice-like manner on the top surface of a plate-like object (9) such as a plate, The metering type rotary pump (6) and the rotary pump type number t5 machines (10) are capable of intermittently controlling the supply and spreading operations of the metering type rotary pump (6) and the rotary pump type sprayer (10). An intermittent drive mechanism such as an electromagnetic clutch brake (12, 1
3) and connect the rotary pump type sprayer (10
) By reducing the set supply amount of the adhesive by the metering type rotary pump (6>), the additive is applied by the difference in volume. A speed reducer such as a variable speed reducer is connected between one side of the intermittent drive unit 1 (12, 13) and a drive source (14) such as a motor so that the mixture can be drawn into the mixing circuit (5) and mixed at any ratio. An adhesive mixing and dispersing device characterized by interposing a drive Mi@(15).

Claims (1)

[Claims] A mixing circuit (5) equipped with a static mixer (4) in which a right-handed twist element (2) and a left-handed twist element (3) are alternately orthogonally connected in multiple stages in a pipe (1); Adhesive supply circuit (5) equipped with a quantitative rotary pump (6) such as a gear pump that supplies adhesive to the circuit (5).
7), an addition supply circuit (8) that supplies additives such as a curing agent to the mixing circuit (5), and a mixture of the adhesive and additives discharged from the mixing circuit (5) to a veneer veneer. An adhesive mixing and dispersing device comprising an admixture dispersing circuit (11) equipped with a rotary pump type dispersing machine (10) for dispersing in a cascade shape on the upper surface of a plate-like body (9) such as The metering type rotary pump (6) and the rotary pump type spreader (10) are each equipped with an electromagnetic device so that the supply and spraying operations of the rotary pump (6) and the rotary pump type spreader (10) can be controlled intermittently. An intermittent drive mechanism (12, 13) such as a clutch brake is connected, and the metering type rotary pump (6) is connected to the set spray amount of the adhesive and additive mixture by the rotary pump type sprayer (10). ), the intermittent drive mechanism (12, 13) An adhesive mixing and dispersing device characterized in that a deceleration drive mechanism (15) such as a variable speed reducer is interposed between one side and a drive source (14) such as a motor.