JPH0233351B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for continuously measuring and extruding food material mixtures and plastic materials.
In particular, when a plastic material with low fluidity is fed into a hopper in the form of a lump with many voids, it is installed below the hopper to continuously measure and feed the material while eliminating the voids. It has great utility value in food factories and other processing industries that use similar materials.

(Prior art and problems) Conventional plastic material feeding devices include those that transfer the material using a screw installed in a cylinder, and those that transfer the material by rotating a pair of gears such as a gear pump. There are things to do.

When transferring plastic materials using these devices, the air present in the gaps is trapped in the material fed into the hopper, and the material is transferred as is, making it impossible to continuously feed a constant weight. I was getting used to it.

As a technique that eliminates these drawbacks, there is Japanese Patent Application No. 62-39963 filed by the present applicant, but by further improving the above technique, the present applicant has
Continuous is a method that further improves the accuracy of fixed amount feeding.

(Means for Solving the Problems) The configuration of the present invention is such that a flat plate that can freely go in and out is inserted into a slit provided in the axial direction on the generatrix of a hollow cylindrical body, and a cam circumscribing the end of the flat plate and an inner A cam is provided in contact with the cam, and an outer peripheral chamber surrounded by the flat plate, the circumscribed cam, the outer surface of the hollow cylindrical body, and the housing side wall, and an inner peripheral chamber surrounded by the flat plate, the internal cam, the inner surface of the hollow cylindrical body, and the housing side wall are on the back side of the flat plate. a section in which the volume of the outer circumferential chamber relatively decreases and the volume of the inner circumferential chamber increases when the hollow cylindrical body is rotated; This is done so that the chamber has sections with a constant volume.

One of the important features of the present invention is that, as described above, the section in which the volume of the peripheral chamber is reduced is followed by a section in which the volume of the peripheral chamber is constant. If this constant volume section does not exist,
Or, if the length is shorter than the length surrounded by two flat plates, the volume of the peripheral chamber is affected by the periodic increase in pressure in the area where the volume decreases, and the material will never be fed due to the phenomenon of pulsating feed. Continuous feeding of a certain amount is not possible.

The present invention solves the above-mentioned drawbacks by providing a section with a constant volume of the outer peripheral chamber so that the material can be transferred at a constant volume and at a constant pressure.

(Embodiment) The present invention will be described below based on an embodiment. A hollow cylindrical body 2 is rotated by a drive shaft 3 at the bottom of a hopper 1 into which food material 17 (hereinafter referred to as "material") is introduced.

Slits 4 are provided on the generatrix of the hollow cylindrical body 2 at predetermined intervals in the axial direction, and a flat plate 5 is inserted into the slit 4 so as to be freely movable in and out of the slit 4 in the direction of its outer circumference.

The flat plate 5 has grooves 6 on its surface. Groove 6 is flat plate 5
When it rotates by the shaft 3, it is located on the back side in the direction of movement.

A circumscribed cam 8 is provided on the outside of the hollow cylindrical body 2, with which the outer end of the flat plate 5 that is inserted into the cylindrical body 2 comes into contact, and an internal cam 9 is provided on the inside of the cylindrical body 2, with which the inner end of the flat plate 5 comes into contact. It is set up.

An outer peripheral chamber 11 is formed on the outside of the hollow cylindrical body 2 and is surrounded by the outer surface of the cylindrical body 2, the flat plate 5, the circumscribed cam 8, and the housing wall surface 10.

Further, an inner circumferential chamber 12 is formed inside the cylindrical body 2 and is surrounded by the inner surface of the cylindrical body 2, the flat plate 5, the internal cam 9, and the housing wall surface 10.

As shown in FIG. 1, when the hollow cylindrical body 2 rotates in the direction a, the flat plate 5 is pushed in by the circumscribing cam 8, so that the volume of the outer peripheral chamber 11 gradually decreases.

During this time, the flat plate 5 is pushed by the circumscribed cam 8 and enters the inner cylinder of the hollow cylindrical body 2, so that the volume of the inner circumferential chamber 12 increases together with the surface of the inner cam 9.

Following the section 15 in which the volume of the outer circumferential chamber 11 decreases, a section 16 in which the volume of the outer circumferential chamber 11 is constant is provided. This constant section 16 is between the circumscribed cam 8 and the internal cam 9.
Since the circumferential surface of the cylindrical body 2 is concentric with the axis of the cylindrical body 2, the volumes of the inner circumferential chamber 12 and the outer circumferential chamber 11 do not change.

The material transferred through this section by the flat plate 5 does not change in volume, so it moves under constant pressure.

A material outlet 18 is provided next to this section 16.

If there is no constant volume section like the section 16 and the material discharge port 18 is provided immediately following the volume decreasing section 15, the internal pressure of the material 17 will gradually increase due to the movement of the flat plate 5, and then the material will be discharged. Exit 18
Since the material is discharged from the flat plate 5, the discharge speed increases or decreases in synchronization with the rotation period of the flat plate 5, resulting in pulsating discharge and never continuous constant discharge. .

If the section 16 is provided, the material 17 can be attached to the front and rear flat plates 5.
Since the material is transported to the material discharge port 18 and discharged in a constant volume surrounded by the material, the pulsating discharge as described above does not occur. This constant volume section 16 is the minimum flat plate 2
This effect can be achieved if the length is such that the front and back are surrounded by the sheets to form a closed room.

Next, the end position of the internal cam 9, that is, the flat plate 5
An air exhaust port 13 is provided at the position where the air is pushed out the most.

The air 14 that was taken in by the hotspot 1 and pushed into the outer peripheral chamber 11 is transferred to the flat plate 5 as shown in FIG.
As the air moves forward, all of the air is absorbed into the inner circumferential chamber 12 through the holes in the groove 6 and is discharged from the outlet 13 (in the direction of arrow b).

This ejection force in the present invention appears extremely strong. In other words, as the inner chamber moves, its volume increases while remaining airtight, resulting in a decrease in air pressure, and the phenomenon in which the volume of the outer chamber decreases as its position moves causes an effect that pushes out air, etc. This has a strong deaeration effect on the material.

This reaction action first removes air and then removes some material while increasing the material density in the outer chamber so that the outer chamber is constantly filled with material to achieve the purpose of metered transfer.

At this time, some material 17 may also be discharged at the same time, so it is convenient to make the discharge port 13 conductive to the inside of the hopper 1.

(Effect of the invention) As explained above, the air trapped in the material is forcibly deaerated while being transferred by the rotation of the hollow cylinder, and the density of the material becomes constant and no random penetration occurs. Since the material is continuously supplied to the downstream side while maintaining the amount of waste material and is transferred at a constant pressure, continuous and constant discharge without pulsating discharge is possible.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of an embodiment of the present invention, FIG. 2 is a front sectional view of the embodiment of the invention, and FIG. 3 is a perspective view of a hollow cylindrical body 2. As shown in FIG. DESCRIPTION OF SYMBOLS 1...Hopper, 2...Hollow cylindrical body, 3...Drum drive shaft, 4...Slit, 5...Flat plate, 6...Groove,
8... External cam, 9... Inner cam, 10... Housing side wall, 11... Outer periphery chamber, 12... Inner periphery chamber, 13... Air outlet, 14... Air, 15... Decreasing section, 16... Constant section, 17... Material , 18...Material discharge port.

Claims (1)

[Claims] 1. A flat plate that can be freely moved in and out is inserted into a slit provided in the axial direction on the generatrix of a hollow cylindrical body, and a cam that circumscribes and a cam that inscribes the end of the flat plate is provided, and the flat plate,
The outer circumferential chamber surrounded by the circumscribed cam, the outer surface of the hollow cylindrical body, and the housing side wall, and the inner circumferential chamber surrounded by the flat plate, the internal cam, the inner surface of the hollow cylindrical body, and the housing side wall are provided so as to communicate with each other at the back surface of the flat plate, and the hollow When the cylindrical body is rotated, a section in which the volume of the outer circumferential chamber relatively decreases and a volume of the inner circumferential chamber increases, and a section in which the outer circumferential chamber has a constant volume following the section. A food material metering and feeding device, characterized in that the constant volume section has a distance such that at least two flat plates are present.