JPH0240494B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid resin metering and conveying device having a pail can and a pressurized lid slidably housed inside the pail can. It is placed on a lifting platform that is supported to be slidable up and down, and a synchronous valve is connected to the upper part of the pressurizing lid.
A metering transfer pump fixed to the base frame is connected to the upper part of the synchronous valve, and a metering transfer pump driving source is supported on the base frame. It is.

Generally, in an injection molding machine for liquid resin, fixed amounts of a liquid main agent and a curing agent are measured and supplied to the injection molding machine, and the two agents are mixed and injected in a mixing chamber attached to the injection molding machine. The so-called pre-stock chamber method is often used.

Conventionally, a liquid resin measuring and conveying device for such a liquid resin injection molding machine has been used, which consists of a conveying system and a measuring system as shown in FIG.

That is, 1 is a conveyance system, 2 is a measurement system,
3 is an injection molding machine. The conveyance system 1 basically includes a pail can 5 placed on a base 4, and a pail can 5 placed on a base 4.
It consists of a pressurizing lid 6 slidably housed inside.
A transfer pump 7 is connected to the pressurizing lid 6 , and the transfer pump 7 is connected to a transfer pump drive source 8 supported by a movable frame 9 . Furthermore, the movable frame 9 is connected to a drive source 11 via a drive rod 10.

That is, the pressurizing lid 6, the transfer pump 7, the transfer pump drive source 8, the movable frame 9, and the drive rod 10 are all integrally connected.

On the other hand, the metering system 2 includes a metering pump 12, a metering pump drive source 13, and a synchronous valve 14.

In the above configuration, when the drive rod 10 is pulled down by the drive source 11, the pressurizing lid 6 is moved along with the movable frame 9, the transfer pump drive source 8, and the transfer pump 7.
is pushed down inside the pail can 5 and pressurizes the material M inside the pail can 5. The pressurized material M flows into the conveying pump 7 and flows out to the metering system 2 by the operation of the conveying pump drive source 8 . Measuring system 2
Inside, a certain amount of material M is measured by a metering pump 12 and supplied to the injection molding machine 3.

The above-mentioned conveyance system 1 is a general-purpose extrusion device, which is often used for extruding putty materials, etc., and it is recommended that it be repurposed as a conveyance device for liquid resin and used in combination with a measuring system. This is the current situation.

This conventional technology uses a combination of a liquid resin transport system and a metering system, which has the disadvantage of an extremely complex structure.Furthermore, the above combination requires two sets, one for the base resin and one for the curing agent. However, this has the disadvantage that the device becomes larger and more expensive.

An object of the present invention is to solve the above-mentioned disadvantages by integrating a conveying system consisting of a pail can and a pressurized lid with a measuring system, in view of the problems caused by structural limitations based on the above-mentioned prior art. The object of the present invention is to provide an excellent liquid resin metering and conveying device that is extremely compact and eliminates the disadvantages.

The structure of the present invention in accordance with the above object is to pressurize the material between it and the stationary pressurizing lid by pushing the pail upwards when measuring and conveying liquid resin. The gist of the system is to allow material to flow into a metering pump, and after a certain amount of material has flowed in, the liquid resin can be delivered by operating the metering pump.

Next, an embodiment of the present invention will be described below based on the drawings from FIG. 2 onwards.

In FIG. 2, a base frame 16 is provided on the base 15, and the base frame 16 is provided with a first support 17 erected on the base 15, and a base frame 16 provided above the first support 17. a first upper member 18 , a second support 19 erected on the first upper member 18 , and a second upper member 2 provided on the top of the second support 19
Consists of 0. Reference numeral 21 denotes a lifting platform, which is supported by the first column 17 so as to be vertically slidable. Reference numeral 22 denotes a lifting platform driving source, the base of which is fixed to the lower part of the first upper member 18, and the internal piston 23
is connected to the lifting platform 21 via a connecting rod 24, and is interposed between the base frame 16 and the lifting platform 2.

There are two pail cans 25, 2 on the lifting platform 21.
5' are placed, and each one has, for example,
Liquids to be transported, such as a main agent M and a curing agent M', are sealed. Pressure lids 26, 26' are slidably inserted loosely into the pail cans 25, 25'.
Synchronous valves 27, 27' are connected to the upper part of 6', and these synchronous valves 27, 27' communicate with the inside of the pail cans 25, 25' via pipes 28, 28'. 2
9, 29' are conveyor pipes from the synchronous valves 27, 27';
It is connected to the injection molding machine. Synchronous valve 27, 27'
are connected to metering pumps 31, 31' via height adjustment adapters 30, 30', and the metering pumps 31, 31' are fixed to the first upper member 18 of the base frame 16. .

On the other hand, a carriage 34 is supported on the second support column 19 of the base frame 16 so as to be vertically slidable, and is connected to the pistons 32, 32' of the metering transfer pumps 31, 31' via connecting rods 33, 33'. has been done. A metering pump drive source 35 is fixed on the second upper member 20 of the base frame 16, and its piston 3
6 is connected to the carriage 34 via a connecting rod 37.

In the above configuration, when the elevating table drive source 22 is operated to lift the elevating table 21 upward, the pail can 25 also rises, and during this time, the pressure lid 26 is
5, the material M in the pail can 25 is pressurized.

At this time, the synchronous valve 27 is in a state of communicating the inside of the pail can 25 and the metering transfer pump 31 via the pipe line 28. On the other hand, when the metering transfer pump drive source 35 is activated and the carriage 34 is pulled up, the metering transfer pump 31 is operated in the suction process, and the piston 32 is driven upward and pulled upward, as shown in FIG. 3A. The pressurized material M in the pail can 25 is introduced into the metering pump 31 via the pipe line 28 and the synchronous valve 27. After a certain amount has been introduced, the synchronous valve 27 is switched and the metering transfer pump 3
1 is communicated with a transport pipe 29.

In this state, as shown in FIG. 3B, the piston 32 of the metering pump 31 is driven downward by the metering pump driving source 35, and when pushed downward, the metering pump 31 is activated in the discharge process. The material M is then extruded into the conveying pipe 29 and supplied to the injection molding machine via the conveying pipe 29. During this time, exactly the same operation is performed for the other pail can 25'.

The height adjustment adapters 30, 30' are used to finely adjust the height of the pressure lids 26, 26' in the pail cans 25, 25' prior to the weighing and conveying work. Even if the liquid levels of materials M and M' in 25' do not match each other, the pressure lid 26,
The lower surface of 26' can be precisely adapted to each liquid level.

By the way, in the above embodiment, the pail cans for the two drugs are placed on a common lifting platform, and in this case, the ratio of the measured amounts of the two drugs to be transported is limited to 1:1. be done. However, the mixing ratio of the base resin and the curing agent in an injection molding machine for liquid resin is usually 1:1 in many cases, and the amount of conveyance measured in the above embodiments does not cause any problem.

If it is necessary to make the measured transport ratios of the two drugs different, the elevating platform can be divided into two parts as shown in FIG. 4, and each part can be provided with a driving source.

That is, the first lifting platform 21' is connected to the supports 17', 17'.
It is supported vertically and slidably on the base frame 16, and is connected to a piston 23' of a first lifting platform drive source 22' fixed to the base frame 16 via a connecting rod 24'. A first pail can 25 filled with material M is placed on the first lifting table 21'. On the other hand, the second elevating table 21'' is similarly supported by supports 17', 17'' so as to be vertically slidable, and is connected to the second elevating table driving source 22''. A second pail can 25' is placed.

Note that the other components are the same as those indicated by the same reference numerals in FIG.

With this configuration, each lifting platform 21', 21'' is independently driven by a drive source 22',
22'', the materials M and M' can be metered and conveyed in any ratio by appropriately selecting the diameters of both metering and conveying pumps 31 and 31'.

As described above, according to the present invention, a pail can is placed on a lifting platform, a pressure lid is slidably installed inside the pail can, and a synchronous valve and a base frame are fixed to the pressure lid. By arranging the metering conveyance pumps in series, the liquid resin conveyance system and the metering system, which were conventionally separate, can be integrated, resulting in an excellent effect of simplifying the structure.

Furthermore, not only can the drive source of the transfer pump and the drive source of the metering pump be integrated, but also the pressurization of the material in the pail can can be achieved simply by raising the lifting platform. There is an advantage that the pressurizing mechanism is simplified.

Furthermore, by dividing the lifting platform and providing a drive source for each, and by providing a configuration in which conveyance metering pumps of different diameters are provided, there is also the effect that the metering and conveyance ratio of materials can be arbitrarily selected. .

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram of a conventional liquid resin metering and conveying device, FIG. 2 and the following diagrams show embodiments of the present invention, FIG. FIG. 3B is an enlarged sectional view of a main part showing an operating state, and FIG. 4 is a partial sectional view of another embodiment. 16... Base frame, 21... Lifting platform, 22... Lifting platform drive source, 25, 25'... Pail can, 26, 2
6'...Pressure cover, 27, 27'...Synchronous valve, 31,
31'...Measuring transfer pump, 35...Measuring transfer pump drive source.

Claims (1)

[Scope of Claims] 1. A lifting platform 21 supported by the base frame 16 in a vertically slidable manner; and an elevator platform 21 interposed between the base frame 16 and the lifting platform 21;
1, and the pail cans 25 and 2 placed on the lifting platform 21.
5', pressurizing lids 26, 26' that are slidably inserted loosely along the inner surface of each pail can 25, 25' to cover the surface of the liquid to be transported in each pail can 25, 25', and the base thereof is attached to the base frame 16. A fixed metering transfer pump 31, 31' is interposed between the tip of each metering transfer pump 31, 31' and each pressurizing lid 26, 26', and each metering transfer pump 31, 31' In the suction process, the liquid to be transported inside each pail can 25, 25' is communicated with each metering transfer pump 31, 31', and in the discharge process of each metering transfer pump 31, 31', each metering transfer pump 31, 31''The liquid to be transported in each transport pipe 29,
29', and each metering transfer pump 3 supported on the base frame 16.
1, 31', each metering pump 3
A liquid resin metering and conveying device comprising a drive source 35 that drives the pistons of the metering and conveying pumps 31 and 31' upward and, in the discharge process of each of the metering and conveying pumps 31 and 31', pushes down the pistons of the metering and conveying pumps 31 and 31'. . 2. The elevating table 21 has separate elevating table drive sources 22',
The liquid resin measuring and conveying device according to claim 1, which comprises two lifting tables 21' and 21'', each having a height of 22''.