JPH04271867A - High-viscosity fluid packing device - Google Patents

Abstract

PURPOSE:To improve a defoaming rate by removing the foam intruding into the high-viscosity fluid to be packed into a constant quantity discharging container body. CONSTITUTION:While the high-viscosity fluid 2 is pressurized and is packed from a nozzle 6a of the constant quantity discharging container body 5, the opening end of a cylinder 6 of the constant quantity discharging container body 5 is hermetically closed by a cap body 8. A spring member 9 is interposed between this cap body 8 and a piston member 7 moving back and forth in the cylinder 6 and an air suction means which intermittently sucks the air in the cylinder 6 is connected to the cap body 8.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention is directed to a fixed quantity dispensing container body used in a fixed quantity dispensing device called a dispenser that dispenses liquid cream solder or adhesive in substantially constant amounts. Regarding high viscosity fluid filling devices for filling agents, we have devised ways to improve the defoaming rate by extremely easily removing air bubbles that easily get mixed into high viscosity fluids such as cream solder and adhesives and are difficult to remove. This invention relates to a high viscosity fluid filling device.

0002

[Background Art] In recent years, in the manufacturing process of various devices, etc.
BACKGROUND ART Automation for the purpose of saving labor and improving quality is being promoted, and along with this, so-called dispensers are frequently used in processes such as bonding processes for small parts and mounting processes for circuit boards. This fixed-quantity dispensing device called a dispenser is a device that dispenses a highly viscous fluid such as liquid cream solder or adhesive contained in a fixed-quantity dispensing container in approximately constant amounts.
As shown in FIG. 2, this fixed quantity dispensing container body has a nozzle 6 at one end.
It consists of a syringe-shaped cylinder 6 made of a synthetic resin material with an opening at the other end and a piston member 7 that reciprocates within the cylinder 6 to push out the highly viscous fluid 2. In the fixed amount dispensing device, by sending compressed air into the cylinder 6, the piston member 7 sends the high viscosity fluid 2 to the nozzle 6a.
The appropriate amount is dispensed from the container. Here, cylinder 6
If air bubbles are mixed into the high viscosity fluid 2 inside, the cream solder, adhesive, etc. that should be applied to the target object such as a circuit board will not be applied by the amount of air bubbles, and as a result, the soldering process or adhesive will be damaged. There was a risk that defects would occur during the process. Therefore, in order to perform highly reliable work that does not cause defects such as soldering and adhesion in the manufacturing process of various equipment, etc., high viscosity fluid is filled into the metered volume dispensing container body in a manner that prevents air bubbles from getting mixed in. A viscous fluid filler has been devised. This conventional high viscosity fluid filling device 11 has a pressing lid 4 formed with a hole 4a for engaging a metered discharge container body 5 fitted into the upper opening of a container body 3 containing a high viscosity fluid 2. By pressurizing the press lid 4 downward, the hole 4a is closed.
The high viscosity fluid 2 rising from the cylinder 6 is filled into the cylinder 6 through the nozzle 6a of the metered discharge container body 5. According to such a filling method, the tip of the nozzle 6a of the metered discharge container body 5 into which the high viscosity fluid 2 flows is always located within the high viscosity fluid 2 without being exposed to the atmosphere. is filled only with high viscosity fluid 2.

0003

[Problems to be Solved by the Invention] However, in the conventional high viscosity fluid filling device described above, it is not possible to remove air bubbles that have been mixed into the high viscosity fluid by stirring to homogenize the physical properties. Therefore, there was a risk that problems would occur in the manufacturing process using the metered dispensing device. Therefore, in the present invention, air bubbles are not mixed in when filling a high-viscosity fluid into a metered-dose dispensing container body in order to perform highly reliable work that does not cause defects in the manufacturing process using a metered-dose dispensing device. In addition, it is an object of the present invention to provide a high viscosity fluid filling device that can also remove air bubbles that have been mixed in the high viscosity fluid filled in the metered dispensing container body.

0004

[Means for Solving the Problems] In order to achieve the above-mentioned object, the high viscosity fluid filling device of the present invention has one end that sucks pressurized high viscosity fluid from a sealed high viscosity fluid container. In a high viscosity fluid filling device for filling a high viscosity fluid into a fixed quantity dispensing container body consisting of a cylinder with an open other end and a piston member reciprocating within the cylinder, the cylinder has an open nozzle. The end is sealed by a lid, and a spring member is interposed between the lid and the piston member to press the piston member toward the nozzle, and an air suction device is provided to intermittently suck the air inside the cylinder. The device is characterized in that a means is connected to the lid. Furthermore, the air suction means for suctioning the air in the cylinder of the metered discharge container body may be provided with a valve body that alternately brings the air pressure in the cylinder to a reduced pressure state and an atmospheric pressure state.

[0005]

[Operation] A spring member that presses the piston member toward the nozzle is interposed between the lid body that seals the open end of the cylinder and the piston member, and the air inside the cylinder is intermittently sucked by the air suction means. When the air suction means is suctioning the air in the cylinder, the piston member overcomes the pressing force of the spring member and moves toward the open end of the cylinder, causing the high viscosity fluid filled in the cylinder to A reduced pressure state is created, which increases the volume of the bubbles within the highly viscous fluid. Furthermore, when the air suction means is not suctioning the air in the cylinder, the piston member moves toward the nozzle due to the pressing force of the spring member, and the high viscosity fluid filled in the cylinder becomes pressurized. This reduces the volume of bubbles in the highly viscous fluid. Then, the bubbles in the high viscosity fluid undergo peristaltic motion in the high viscosity fluid while repeating expansion and contraction of their volume, and finally eject from the gap between the piston member and the cylinder and are passed through the air suction means to the outside. is discharged.

[0006] Furthermore, by providing the air suction means with a valve body that alternately sets the air pressure in the cylinder to a reduced pressure state and an atmospheric pressure state, the air pressure caused by the piston member when the air suction means is not suctioning air is reduced. As the pressure on the viscous fluid increases, the volume of bubbles within the viscous fluid becomes smaller. As a result, the peristaltic motion of the bubbles in the high viscosity fluid becomes more active, making it easier to remove the bubbles in the high viscosity fluid within the cylinder.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1(a) is an explanatory diagram showing a high viscosity fluid filling device of the present invention, and FIG. 1(b) is a sectional view showing a fixed quantity dispensing container body attached to the filling device.

In the figure, 1 is a high viscosity fluid filler, 2 is a high viscosity fluid such as silicone solder or adhesive, 3 is a container body containing the high viscosity fluid 2, and 4 is an upper opening of the container body 3. 5 is a fixed-quantity dispensing container body consisting of a substantially syringe-shaped cylinder 6 made of a synthetic resin material and a piston member 7 made of a synthetic resin material that reciprocates within the cylinder 6; , 8 is a lid body that is hermetically fitted to the upper open end of the cylinder 6, 9 is a spring member consisting of a coil spring that is interposed between the lid body 8 and the piston member 7 and presses the piston member 7, and 10 is a spring member A tube whose one end passes through the lid 8 in order to circulate the air in the cylinder 6, a valve body 11 consisting of a solenoid valve or the like that is connected to the middle part of the tube 10 and opens and closes the tube 10 intermittently; The other end of the tube body 10 is connected to an air suction mechanism such as a vacuum pump or a vacuum ejector. The cylinder 6 has a narrowed lower end to form a nozzle 6a, and this nozzle 6a is inserted into the hole 4 of the press lid 4.
It has a structure that fits into a. When the high viscosity fluid filler 1 of the present invention is mounted with the empty metered discharge container body 5 and driven, the air suction mechanism 12 continuously sucks air through the tube body 10, while the valve body 11 is moved from the tube body. 10 is opened and closed intermittently, and when the pipe body 10 is closed, the pipe body 10 on the metered volume dispensing container 5 side communicates with the atmosphere. When the valve body 11 is open, the air inside the cylinder 6 is sucked and the spring member 9
The piston member 7 is pulled upward by overcoming the pressing force of
A highly viscous fluid 2 is suctioned from. When the valve body 11 is closed, the air in the cylinder 6 becomes atmospheric pressure and stops lifting the piston member 7 upward, and the spring member 9 presses the piston member 7 toward the nozzle 6a. . Although the high viscosity fluid 2 inside the cylinder 6 tries to be discharged outside from the nozzle 6a by the piston member 7, the high viscosity fluid 2 outside the nozzle 6a is forced into the cylinder 6 from the nozzle 6a due to the strong pressing force of the pressing lid 4. Since the high viscosity fluid 2 is about to flow in, the high viscosity fluid 2 will not be discharged outside the cylinder 6 and will be placed in a pressurized state. The timing at which the valve body 11 opens and closes is set to an appropriate value depending on the viscosity of the high viscosity fluid 2 and the shape and dimensions of the metered dispensing container body 5. When filling a fixed quantity discharge container body, it is suitable to drive at a timing of approximately several tens of seconds. In this embodiment, cream solder or adhesive is used as the highly viscous fluid, but the invention is not limited to this, and any highly viscous fluid such as oils and fats, cosmetics, foods, etc. It's also good.

[0009]

As described in detail above, according to the high viscosity fluid filling device of the present invention, a spring member is provided between the lid body that seals the open end of the cylinder and the piston member to press the piston member toward the nozzle. By intermittently suctioning the air inside the cylinder with an air suction means, the air bubbles mixed with the high viscosity fluid inside the cylinder move out of the cylinder while making a peristaltic movement that repeatedly expands and contracts their volume. be discharged. As a result, compared to conventional high viscosity fluid fillers that simply pressurize high viscosity fluid and fill it into a metered volume discharge container body,
It is now possible to extremely easily improve the defoaming rate of the highly viscous fluid filled into the metered dispensing container without requiring expensive and large-scale equipment. This allows for highly reliable and suitable work.

[Brief explanation of the drawing]

FIG. 1(a) is an explanatory diagram showing a high viscosity fluid filling device of the present invention, and FIG. 1(b) is a sectional view showing a metered discharge container body attached to the high viscosity fluid filling device.

FIG. 2 is an explanatory diagram showing a conventional high viscosity fluid filler.

[Explanation of symbols]

1 High viscosity fluid filling device 2 High viscosity fluid 5　Quantity discharge container body 6 Cylinder 6a Nozzle 7 Piston member 8 Lid body 9 Spring member 11 Valve body 12 Air suction mechanism

Claims (2)

[Claims] Claim 1: A cylinder having one end formed with a nozzle for sucking pressurized high viscosity fluid from a sealed high viscosity fluid container and the other end open, and a piston member reciprocating within the cylinder. In a high viscosity fluid filling device for filling a high viscosity fluid into a fixed quantity dispensing container body made of A high viscosity fluid filler characterized in that a spring member that presses in the direction of the nozzle is interposed, and an air suction means that intermittently sucks air in the cylinder is connected to the lid. [Claim 2] The air suction means for suctioning the air inside the cylinder of the fixed-quantity dispensing container is equipped with a valve body for alternately bringing the air pressure inside the cylinder into a reduced pressure state and an atmospheric pressure state. The highly viscous fluid filling device according to claim 1.