JP4659063B2 - Cylinder inner diameter measuring device - Google Patents

Description

  The present invention relates to a cylinder inner diameter measuring device for a screw-type kneading extruder, and in particular, a pair of distance measuring devices are provided in each cylinder hole, and each distance measuring device is rotated without contact with the inner surface of each cylinder hole. The present invention relates to a new improvement for making it possible to easily measure the inner diameter wear amount by measuring.

In general, raw materials such as powdery or granular synthetic resin raw materials and food raw materials are melted and kneaded by a screw-type kneading extruder while adding additional raw materials such as inorganic materials such as glass fiber and iron oxide as necessary. It is being processed and produced as a new product.
The screw-type kneading extruder used for such processing is mainly composed of a cylinder and a screw that is inserted into the cylinder hole and driven to rotate.
This cylinder has a long cylindrical shape in which a cylinder hole having a circular cross section perpendicular to the axis is formed, and the screw has a long rod shape in which a spiral groove is mainly formed in the outer periphery having a circular cross section perpendicular to the axis. A slight predetermined amount of gap is provided and inserted into the cylinder hole of the cylinder.

  In this screw type kneading extruder, if the cylinder hole of the cylinder is worn or corroded locally or extensively due to the raw material having wear or corrosiveness during processing operation, the screw type kneading extruder has the melting and kneading performance. At the same time, the processing operation is not stable, and the quality of the produced product is lowered.

  Therefore, for example, a screw-type kneading extruder regularly checks the cylinder bore for wear or corrosion, and if the wear amount exceeds the allowable value, or uneven wear or corrosion occurs beyond the allowable range. In such a case, it is necessary to replace the cylinder with a normal cylinder or cylinder block.

As a device for measuring the inner diameter of a cylinder hole for confirming the wear of the cylinder hole in a biaxial and multiaxial screw kneading extruder, there is one disclosed in Patent Document 1.
The cylinder inner diameter measuring apparatus disclosed in this publication includes a traveling carriage provided with a guide member that slides in the axial direction along adjacent convex portions of a plurality of cylinder holes in which cylinder holes partially overlap each other in a cross section perpendicular to the axis. And a non-contact type measuring means that is provided in the traveling carriage and rotates around the axis of each cylinder to measure the inner diameter of the cylinder hole.

  When measuring the inner diameter of the cylinder cylinder hole with the cylinder inner diameter measuring device configured in this way, first, in a reference jig manufactured to a normal value with the same configuration as the cylinder to be measured, the adjacent convex portion of the cylinder hole The cylinder inner diameter measuring device is installed in the measurement state along the guide member, and the non-contact type measuring means corresponding to each cylinder is subjected to reference adjustment (zero point adjustment) and initial setting.

Next, in the cylinder in which the screw of the screw type kneading extruder is pulled out, the cylinder inner diameter measuring device is inserted from the open end into the cylinder hole with the guide member along the convex portion. Next, the traveling carriage is moved, the guide member is slid along the convex portion, moved within the cylinder by a predetermined distance, and the non-contact type measuring means is rotated around the axis to measure the inner diameter of the cylinder hole. The measurement data is recorded in an external recording means (PC).
In the same manner, the cylinder was moved over the entire length of the cylinder, the inner diameter of the cylinder hole was sequentially measured at a desired position, and the measurement data was recorded in the recording means.

Japanese Patent No. 3746777

Since the cylinder inner diameter measuring device of the conventional screw-type kneading extruder is configured as described above, the following problems exist.
That is, because the inside of the cylinder is unevenly worn or corroded by the material to be kneaded, the convex portion that is the mating surface of each cylinder hole will also be worn or corroded, and this convex portion is used as a guide for the distance measuring device. It was difficult to measure the amount of damage due to the displacement of the core of the measuring instrument due to the accurate inner diameter of the cylinder hole, that is, wear or corrosion.

A cylinder inner diameter measuring device according to the present invention includes a longitudinal cart inserted into a biaxial cylinder, and a plurality of wheels provided on the outer surface side of the cart and in contact with inner surfaces of first and second cylinder holes of the biaxial cylinder. The first and second rotating bodies rotatably provided on both sides orthogonal to the longitudinal direction at one end of the carriage, and the magnetic or dielectric type provided on the rotating bodies facing each other back to back. A pair of non- contact type distance measuring devices, wherein each of the pair of distance measuring devices is rotatably disposed in each of the first and second cylinder holes. On the outer surface side, three longitudinal support members are provided corresponding to the cylinder holes, the wheels are provided on the outer surface of the longitudinal support members, and the carriage and the longitudinal support members are made of rubber or springs. Connected by an elastic body consisting of The rotating body is configured to be in close contact with the inner surface of the second cylinder hole, and each of the rotating bodies is integrally formed with a pair of tongue pieces that are separated from each other, and the overall shape is a U-shape. The measuring device is configured to be provided on each of the tongue pieces, and a rod body for moving the carriage is connected to the one end of the carriage, and the rod body includes the first and second rods. It is the structure located between rotary bodies.

Since the cylinder inner diameter measuring apparatus according to the present invention is configured as described above, the following effects can be obtained.
That is, a longitudinal cart inserted into the biaxial cylinder, a plurality of wheels provided on the outer surface side of the cart and in contact with the inner surfaces of the first and second cylinder holes of the biaxial cylinder, and one end of the cart A pair of first and second rotating bodies rotatably provided on both sides orthogonal to the longitudinal direction and a pair of magnetic or dielectric non- contact distances provided on the rotating bodies facing each other back to back. A pair of distance measuring devices are rotatably disposed in the first and second cylinder holes, respectively, even when uneven wear occurs in the cylinder. The axial position of the rotating shaft of the rotating body that supports the pair of distance measuring devices coincides with the axial position of the cylinder, and the cylinder inner diameter can be measured accurately and easily in a non-contact state.
Further, on the outer surface side of the carriage, three longitudinal support members are provided corresponding to the cylinder holes, and the wheels are provided on the outer surface of the longitudinal support members. The carriage and the longitudinal support members Are connected by an elastic body made of rubber or a spring so that the wheels are in close contact with the inner surfaces of the first and second cylinder holes, and a total of twelve wheels provided on a total of six longitudinal support members Is in contact with the inner surface of the cylinder, the position of the carriage in the cylinder is stabilized, and the measurement accuracy is stabilized.
In addition, each rotating body has a pair of tongue pieces that are separated from each other, and the overall shape is a U-shape, and each distance measuring device is provided on each tongue piece. It is possible to stabilize the rotation center of each distance measuring device at.
Further, a rod body for moving the carriage is connected to the one end of the carriage, and the rod body is located between the first and second rotating bodies. When moving forward and backward, force is applied uniformly to each wheel, and smooth operation can be obtained.

  The present invention provides a cylinder inner diameter measurement in which a pair of distance measuring devices are provided in each cylinder, and the inner diameter wear amount can be easily measured by measuring each distance measuring device without contact with the inner surface of the cylinder hole. An object is to provide an apparatus.

Hereinafter, a preferred embodiment of a cylinder inner diameter measuring device used for a screw type kneading and extruding machine according to the present invention will be described with reference to the drawings in the case of a biaxial screw type kneading and extruding machine in which two cylinder holes are formed in a cylinder. To do.
In the figure, what is indicated by reference numeral 1 is a cylinder inner diameter measuring device, and this cylinder inner diameter measuring device 1 includes a pair of first and second cylinder holes 3 of a biaxial cylinder 2 as shown in FIG. 4, a thick plate-like carriage 5, three longitudinal support members 7 each having a plurality of wheels 6 provided on the outer surface of the carriage 5, and one end 5 </ b> A of the carriage 5 orthogonal to the longitudinal direction A The first and second rotating bodies 8 and 9 each having a U-shape are rotatably provided on both sides of the rotating body and the pair of tongue pieces 8A and 9A of the rotating bodies 8 and 9, respectively. The distance measuring device 10 is mainly configured.

  The carriage 5 is a long box-like or plate-like member, and the traveling wheels 6 are provided so as to protrude in the vicinity of both end portions in the longitudinal direction of the respective longitudinal support members 7. It is configured to be able to run while being pressed against the inner surface of each cylinder hole 3, 4.

  As shown in FIG. 4, each of the three longitudinal support members 7 is aligned with the longitudinal direction in the axial direction of the cylinder 2 at three positions on the upper and lower sides and the laterally right side of the cylinder hole 3, 4. The wheels 5 are arranged in parallel to the carriage 5 so that the wheels 6 can be brought into contact with the cylinder holes 3 and 4, respectively. The wheel 6 attached to the support member 7 is connected and integrated in a movable state so as to be pressed against the cylinder holes 3 and 4 by the elastic body 11, and is configured as a cart 5 that can travel. That is, the cart 5 and the longitudinal support member 7 are connected by the elastic body 11.

In the one end 5A of the carriage 5, each pair of the rotating shaft 16 is provided, the axis of each cylinder bore 3 and 4 to the rotation shaft 16 on the center axis coincides with the axis of the cylinder bore 3 and 4 A U-shaped rotating body 8 that can turn around the core is provided.

On each pair of tongues 8A and 9A of the rotary bodies 8 and 9, two non-contact distance measuring devices 10 are arranged and held back-to-back on an orthogonal line of the rotary shaft 16 passing through the center of rotation. ing.
Each distance measuring device 10 is configured so that the distance between the outer peripheral ends (tips) is slightly smaller than the cylinder holes 3 and 4 and can rotate in a non-contact state with respect to the inner surfaces of the cylinder holes 3 and 4. Has been placed.
The other end of the signal line 18 connected to each distance measuring device 10 is connected to a measurement data recording device (not shown) arranged outside.
The distance measuring device 10 is preferably a magnetic type or a dielectric type.

  At one end, a rod body 19 extending in front of the cart 5 is provided between the rotary bodies 8 and 9, and the cart 5 is moved forward and backward through driving means (not shown) using the rod body 19. It becomes possible. The rod body 19 may be provided so as to extend to the rear of the carriage 5 by being connected to the other end 5B.

Next, the operation will be described.
First, as shown in FIG. 5, the cylinder inner diameter measuring device 1 is inserted into each of the cylinder holes 3 and 4 of the zero adjustment jig 30 manufactured to the normal value of the cylinder to be measured. The distance measuring device 10 is swiveled around the central axis to perform reference adjustment (zero point adjustment) and to perform initial setting.
Furthermore, the measurement direction of each distance measuring device 10 that measures the respective cylinder holes 3 and 4 is set to, for example, the direction of B-F in FIG. The above is the setting operation before measurement.

Next, in the cylinder 2 from which the screw of the screw-type kneading extruder is pulled out, the cylinder inner diameter measuring device 1 is inserted into the cylinder holes 3 and 4 from the opening end.
Next, the rod body 19 is pushed and pulled, and the carriage 5 is caused to travel in the direction of the longitudinal direction A of the shaft core in each cylinder hole 3, 4 via each wheel 6 of the longitudinal support member 7. Are moved and stopped when each distance measuring device 10 reaches a predetermined measurement position.
After stopping, the distance between the two distance measuring devices 10 in the BF direction of each cylinder hole 3 and 4 and the inner surface of the cylinder hole 3 and 4 facing each other, for example, α direction and F direction in the B direction shown in FIG. Β of is measured.
The measurement data is sent to a measurement data recording device (not shown) via the signal line 18, and processing such as calculation is performed as necessary.
That is, each cylinder is obtained by adding and calculating the initial set value that has been subjected to the reference adjustment (zero point adjustment) of the two distance measuring devices 10 and the measured values of the two distance measuring devices 10, for example, α and β. The inner diameter of the holes 3 and 4 is obtained. In addition, as a measurement position, for example, measurement can be performed every 45 ° like BF, CG, DD, and AE in FIG.

The cylinder holes 3 and 4 are cleaned and the remaining raw material is removed after the screw is pulled out, but may remain fixed.
However, since the distance measuring device 10 is of a magnetic type or a dielectric type, non-metal raw materials such as synthetic resin raw materials and food raw materials are ignored, and the cylinder holes 3 and 4 in the metal portion are to be measured. The distance between the distance measuring device 10 and the cylinder holes 3 and 4 is accurately measured.

In the same manner as described above, if a position detection sensor in the longitudinal direction such as a rotary encoder is brought into contact with the rod 19 and this signal and signals of the measured values of the four distance measuring devices 10 are taken into a personal computer or the like, the designated longitudinal direction is obtained. Since data can be automatically measured for each distance, there is no need to stop for each measurement point, and the distance between the cylinder distance measuring device 10 and the cylinder holes 3 and 4 can be measured efficiently.
In addition, about the measurement direction of the distance measuring device 10, what is shown in FIG. 3 is an example, and it can measure by selecting arbitrary directions as needed.

It is a side view which shows the cylinder inner diameter measuring apparatus by this invention. It is a top view of FIG. It is a measurement direction figure of the distance measuring device in the cylinder inner diameter measuring apparatus by this invention. It is arrow AA sectional drawing in FIG. It is a zero adjustment jig used in the present invention.

DESCRIPTION OF SYMBOLS 1 Cylinder inner diameter measuring apparatus 2 Cylinder 3, 4 1st, 2nd cylinder hole 5 Carriage 5A One end 5B Other end 6 Wheel 7 Long support member 8, 9 1st, 2nd rotary body 8A Tongue piece 10 Distance measuring device 11 Elastic body 18 Signal line 19 Rod

Claims (4)

A longitudinal cart (5) inserted into the biaxial cylinder (2), and first and second cylinder holes (3,4) of the biaxial cylinder (2) provided on the outer surface side of the cart (5). ) And a plurality of wheels (6) in contact with the inner surface of the first and second rotating bodies (8, 9) respectively provided at one end (5A) of the carriage (5) so as to be rotatable on both sides orthogonal to the longitudinal direction. And a pair of magnetic or dielectric non- contact distance measuring devices (10) provided on the respective rotating bodies (8, 9) facing each other back to back,
In the first and second cylinder holes (3, 4), a pair of the distance measuring devices (10) are rotatably arranged, respectively.   On the outer surface side of the carriage (5), three longitudinal support members (7) are provided corresponding to the cylinder holes (3,4), and the wheel (6) is connected to the longitudinal support members ( 7), the carriage (5) and each longitudinal support member (7) are connected by an elastic body (11) made of rubber or a spring, and the wheel (6) is connected to first and second cylinder holes ( 3. The cylinder inner diameter measuring device according to claim 1, wherein the inner diameter measuring device is in close contact with the inner surface of the cylinder.   Each of the rotating bodies (8, 9) has a pair of tongue pieces (8A, 9A) that are separated from each other, and has an overall U-shape, and each of the distance measuring devices (10) includes the tongue pieces. The cylinder inner diameter measuring apparatus according to claim 1, wherein the cylinder inner diameter measuring apparatus is provided on (8A, 9A).   A rod body (19) for moving the carriage is connected to the one end (5A) of the carriage (5), and the rod body (19) is composed of the first and second rotating bodies (8, 9). 4. The cylinder inner diameter measuring apparatus according to claim 1, wherein the cylinder inner diameter measuring apparatus is located between the first and second cylinders.

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