JPH0414323Y2 - - Google Patents

Description

[Detailed explanation of the idea] Industrial applications The present invention relates to a blowing pipe for a powder bagging device.

Conventional technology Conventionally, in a powder bagging device that automatically packs powder into bags, a degassing pipe for the pressurized air that accumulates in the bag is installed around the inside of the blowing pipe that fills the bag with the powder that has been pumped. It is fixed by welding to the bottom side, and the inlet at the tip faces downward like the blowing tube, and there is also a rubber expansion tube that expands into the opening of the bag and holds it airtight. Although it is provided on the outer circumference of the tube, an air supply tube made of a small diameter copper tube for supplying compressed air to the expansion tube is arranged along the upper side of the inner circumferential surface of the blowing tube.

Problems that the invention aims to solve: As a result, the degassing tube easily sucks in the powder that is fed into the bag, and it frequently gets clogged, making it impossible to degas the bag and causing it to expand and become punctured. . In addition, the air supply pipe is worn out due to the collision of powder passing through the pipe, and holes form in a short period of time, causing air leaks, and the inflation pipe cannot inflate and hold the bag in the pipe. The bag would fall off and scatter the powder that had been pumped into the area.

Means for Solving the Problems The present invention was developed in view of the above-mentioned points. A degassing pipe is installed along the upper circumference of the blowing tube to deaerate the compressed air accumulated in the stuffing bag, and a suction port is provided at the tip of the tube so that the air can be degassed by passing through the nose of the blowing tube. , an air supply pipe for supplying compressed air to an expansion tube made of rubber or the like provided on the outer periphery of the blowing tube to airtightly seal and hold the opening of the bag, along the outer circumferential surface of the blowing tube. To provide a blowing pipe for a powder bagging device, characterized in that the blowing pipe is connected to a powder bagging device so as to be freely fed to the powder bagging device.

Effects According to the present invention, even when a bag is loaded with powder that is force-fed through the blowing pipe, the nose of the blowing pipe acts as a barrier to prevent powder from entering the degassing pipe and clogging it as much as possible. In addition, since the air supply tube that inflates the expansion tube does not protrude from the inner circumference of the blowing tube, powder will not collide with the air tube and cause it to wear out. It can also prevent the powder from falling out of the tube and scattering to the surrounding area.

Example The present invention will be explained below based on examples.

FIG. 1 and subsequent figures show an embodiment of the present invention. 1st
2 shows an enlarged portion of the blowing pipe 2 of the powder bagging device 1, which is attached so as to protrude from the front surface of the powder bagging device 1 as shown in FIG. 3. A bag 3 such as a paper bag is mounted on the bag holder 5 of the weighing device 4 on the front side of the powder bagging device 1, and the opening 6 at the end is inserted into the blowing pipe 2. The powder 8 introduced into the supply chamber 7 is fed through the auger screw 10 of the mixer 9.
The bag 3 is loaded with compressed air, and the loaded amount is measured by a measuring device 4, so that a predetermined amount can be automatically filled. The blowing pipe 2 has its rear end airtightly connected to the front end of the pressure-feed mixer 9 via a flange 11, and has a blowing pipe nose 12 bent into a smooth arc shape at the upper circumference of the tip. An inlet 13 for blowing the powder 8 into the bag 3 is opened at the lower periphery of the bag 3, and a degassing pipe 14 is arranged along the upper periphery of the blowing pipe 2 as shown in the figure. The tube nose 12 is provided to penetrate the bag 3 so that the air for pumping the powder accumulated in the bag 3 can be evacuated. In addition, the blowing pipe 2
As shown in the figure, the central part of the bag 3 is covered with an expansion tube 16 made of rubber or the like so that the opening 6 of the bag 3 can be sealed airtight by the expansion. An air supply pipe 17 made of a small diameter copper pipe or the like is arranged along the lower part of the outer peripheral surface of the blowing pipe 2. The air supply pipe 17 is fixed to the rear end of the expansion pipe 16 in an arc shape along the blowing pipe 2 as shown in the figure with solder 18, and one end of the blowing pipe 2 protruding outward is connected to a compressor (not shown). It can be connected to a compression hose (not shown) of 1) to freely supply the required compressed air. 19 detects that the opening 6 of the bag 3 is attached to the blowing pipe 2 and releases the powder 8.
This is a starting detector to start bagging.

Then, as shown in FIG. 3, the bag 3 for bagging is mounted on the bag holder 5 of the powder bagging device 1, and the opening 6 at the upper corner is inserted into the blowing pipe 2. Then, the starting detector 19 is activated, and compressed air is supplied through the air supply pipe 17 to inflate the expansion pipe 16 and open the opening 6 of the bag 3.
is in a state of lockdown. Then, the auger screw 10 is driven to supply pressurized air to the supply chamber 7.
At the same time, the powder 8 loaded in the bag 3 is loaded into the bag 3, and the excess pressurized air inside the bag 3 is degassed through the degassing pipe 14, and the powder 8 is packed into the bag 3. It's something to do. At that time, the suction port of the degassing pipe passes through the blowing pipe nose and opens on the top side, so the blowing pipe nose acts as a barrier and prevents powder from entering the degassing pipe as much as possible. This prevents the degassing tube from becoming easily clogged with the loaded powder as in the past.

In addition, even if the powder flows through the blowing pipe, since the air pipe is not inside the blowing pipe, the powder will not collide with the air pipe and cause wear, and the bag can be securely held in the blowing pipe. be.

In the above example, a paper bag was explained, but
The same can be applied to synthetic resin bags and the like.

Moreover, although the deaeration pipe and the air supply pipe are installed inside or outside the blowing pipe, they can also be formed integrally with the blowing pipe.

Effects of the invention As described above, with the present invention, it is possible to avoid as much as possible the clogging of powder in the deaerator, etc., to prevent the bag from being punctured, and to prevent the powder from being sucked into the dust collector unnecessarily. can reduce unnecessary punctures,
In addition, it is possible to completely prevent the air supply tube that inflates the expansion tube from being worn out by the powder, reducing the cost of collecting the powder that is scattered due to the bag falling off or falling off, and the fact that the powder cannot be recovered. , which can greatly contribute to reducing product costs.

[Brief explanation of drawings]

1 and 2 are a side sectional view and a front view of a blowing pipe section according to an embodiment of the present invention, and FIG. 3 is a schematic explanatory view of the powder bagging apparatus of the same. 1...Powder bagging device, 2...Blowing pipe, 3...
Bag, 6... Opening, 8... Powder, 12... Blow tube nose, 14... Deaeration pipe, 15... Inlet, 16
...Inflation pipe, 17...Air supply pipe.

Claims (1)

[Scope of utility model registration request] A degassing pipe is installed above the blowing pipe for deaerating the pressurized air that accumulates in the bag. A suction port is provided along the periphery of the bag, and the tip thereof passes through the nose of the blowing tube to allow degassing. A blowing pipe for a powder bagging device, characterized in that an air feeding pipe for feeding compressed air to an expansion pipe made of rubber or the like is connected to the expansion pipe along the outer circumferential surface of the blowing pipe so as to be able to freely feed compressed air.