JPH05154894A - Method and device for continuously examining molten resin - Google Patents

Abstract

PURPOSE:To make an optical information fetching means detachable without modifying a cylinder and a die of an extrusion molding machine and to perform a continuous examination by a method wherein optical information is obtained through the optical information fetching means provided in a hole in a molten resin path made of the die and the cylinder connected with each other through a die plate. CONSTITUTION:Optical information of a molten resin in an extrusion molding machine 1 is examined through a color measuring device 24. The optical information is obtained through an optical information fetching means 21 provided in a hole 22 in a molten resin path made of a die 8 and a cylinder 3, which are formed in the extrusion molding machine 1 and connected with each other through a die plate 20. The hole 22 is provided in the molten resin path, a tube body 28 is screwed into the hole 22, and a transparent body 31 and an optical fiber 27 are provided in the tube body 28. The optical information is obtained through the transparent body 31 and the optical fiber 27. The transparent body 31 is provided with a tapered surface 30 formed in the axial direction. A lower surface 31a of the transparent body 31 is disposed to be substantially flush with a lower surface 22a of the hole 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for continuously inspecting a molten resin, and more particularly to a continuous inspection by making an optical information extracting means detachable without modifying a cylinder and a die of an extrusion molding machine. For new improvements for.

[0002]

2. Description of the Related Art Conventionally, there are various methods for continuously inspecting a molten resin of this type. A typical one of them is described below. As shown in FIG. A drive device 4 for driving the screw 2 and a hopper 5 for supplying a material are provided on one end 3a side of a cylinder 3 containing 2 therein. A die 8 is connected to the other end 3b side of the cylinder 1 through a connecting pipe 7 having a window portion 6, and an imaging camera 9 connected to an image processing device 10 is arranged above the window portion 6. In addition to being provided, the window 6 is irradiated with light from the light source 11.

Therefore, in the above configuration, the cylinder 1
The state of the molten resin extruded from is obtained as optical information 9a from the window 6 by the imaging camera 9 under the state of being sent to the die 8 through the connecting pipe 7, and information processing is performed by the image processing device 10. ..

[0004]

Since the conventional continuous inspection method for molten resin is constituted as described above, the following problems exist. That is, since a connecting pipe having a window is mounted between the cylinder and the die, a dedicated cylinder or die for measurement is required, and when the production rod is changed by changing the grade of the material, many attachments and detachments are required. Manpower and replacement time, which would reduce overall efficiency.

[0005]

A method for continuously inspecting a molten resin according to the present invention is a method for continuously inspecting optical information of a molten resin in an extruder through a color measuring instrument. It is a method of obtaining the optical information through an optical information extracting means mounted in a hole provided in a molten resin passage formed of a die and a cylinder formed in the extrusion molding machine and coupled to each other.

The continuous inspection mounting of the molten resin according to the present invention is
In a continuous inspection apparatus for molten resin, which is configured to inspect the optical information of the molten resin in an extrusion molding machine through a color measuring device, in a molten resin passage formed of a die and a cylinder formed in the extrusion molding machine and connected to each other. This is a configuration including a hole provided, a tube body screwed into the hole, and a transparent body and an optical fiber provided in the tube body.

More specifically, the transparent body has a tapered surface formed in the axial direction, and the lower surface of the transparent body and the lower surface of the hole are substantially flush with each other.

[0008]

In the method and apparatus for continuously inspecting molten resin according to the present invention, optical information extracting means (tube body, pipe, Since the transparent resin and the optical fiber are mounted), the optical information of the molten resin can be continuously taken out without performing any post-processing on the molten resin passage.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a continuous inspection method and apparatus for molten resin according to the present invention will be described below with reference to the drawings. It should be noted that the same or equivalent portions as those of the conventional example will be described by attaching the same reference numerals. 1 to 5 are for showing a continuous inspection apparatus for molten resin according to the present invention, and FIG.
2 is an overall configuration diagram showing another embodiment of FIG. 1, and FIG. 3 is FIG.
4 is an exploded enlarged cross-sectional view showing the main part of FIG. 4, FIG. 4 is an exploded view showing another embodiment of FIG. 3, and FIG. 5 is an exploded view showing the configuration of FIG. 4 in detail.

In FIG. 1, reference numeral 1 is an extrusion molding machine, and a driving device 4 for driving the screw 2 is provided on one end 3a side of a cylinder 3 in which the screw 2 of the extrusion molding machine 1 is built. And a hopper 5 for feeding the material.

A die 8 is connected to the other end 3b side of the cylinder 1 through a breaker plate 20, and a hole for detachably screwing an optical information take-out means 21 is attached to the die 8. 22 is formed by the thickness thereof. For each of the blocks 3c to 3f of the cylinder 3 and the die 8,
A heater block 23 is provided. In addition, this hole 2
2 uses an existing hole for pressure measurement in the molten resin passage.

The optical information extracting means 21 is connected with a composite optical fiber 27 having a composite structure in which the light receiving side optical fiber 25 and the light projecting side optical fiber 26 connected to the color measuring device 24 are integrated. There is.

The optical information extracting means 21 is constructed as shown in FIG. 3, and the composite optical fiber 27 has a longitudinal metal tube body 28 having a threaded portion 28A on its outer periphery.
Is inserted into the pipe 28 and the tip 28a of the pipe 28
The tapered hole 29 having a shape that is formed on the front side and extends toward the tip side is provided with a transparent body 31 such as heat-resistant glass having a tapered surface 30 that is formed in the axial direction and has the same shape as the tapered hole 29. Fiber 27, tube 28 and transparent body 3
1 constitutes the optical information extracting means 21.
The lower surface 31a of the transparent body 31 and the lower surface 22a of the hole 22 are configured to be substantially flush with each other, and the tip portion 27a of the composite optical fiber 27 is joined to the transparent body 31. ..

Therefore, when the pellets are supplied from the hopper 5 and the screw 2 is rotated through the driving device 4 in the above-described configuration of FIGS. 1 and 3, the pellets are melted and mixed with a molten resin (not shown). ), The molten resin is extruded to the outside from the outlet 8a of the die 8 while being in contact with the lower surface 31a of the transparent body 31 through the breaker plate 20. In this case, when the molten resin passes under the transparent body 31, a force in the pushing-up direction acts on the transparent body 31, but the action of the tapered hole 29 and the tapered surface 30 causes the transparent body 31 to move. The displacement of the upper position is prevented.

The structure shown in FIG. 5 shows the disassembled structure of the structure shown in FIG. 3, and discloses the structure in which the distal end portion 27a of the composite optical fiber 27 is joined to the transparent body 31.

The structure shown in FIG. 4 shows another embodiment of the optical information extracting means 21 of FIG. 3, in which the transparent body 31 is attached to the tip cap 40, and the tip cap 40 is provided.
Is detachably provided on the tip end portion 28 a of the pipe body 28.

Further, in another embodiment shown in FIG.
The optical take-out means 21 is provided with an image pickup camera 52 having an endoscope 51 via an insertion portion 50, and the light source 11 is connected to the endoscope 51 via an optical fiber 53. , The camera cable 5 to the imaging camera 52
A color measuring device 24, which is an image processing device, is connected to the color measuring device 24. Although the hole 22 is formed in the die 8 in the above-described embodiment, it may be formed in the cylinder 3.

[0018]

Since the method and apparatus for continuously inspecting molten resin according to the present invention are configured as described above, the following effects can be obtained. That is, since the optical information take-out means can be detachably attached to the molten resin passage formed by the cylinder and the die by using the existing hole for the pressure measuring pipe, a lot of time for attaching and replacing work and a substantial portion as in the conventional case are required. The continuous inspection of the molten resin can be easily performed without the need for remodeling.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing a continuous inspection apparatus for molten resin according to the present invention.

FIG. 2 is an overall configuration diagram showing another embodiment of FIG.

FIG. 3 is an exploded enlarged cross-sectional view showing a main part of FIG.

FIG. 4 is an exploded view showing another embodiment of FIG.

5 is an exploded view showing the configuration of FIG. 4 in detail.

FIG. 6 is an overall configuration diagram showing a conventional continuous inspection apparatus for molten resin.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Extrusion machine 3 Cylinder 8 Die 20 Breaker plate 22 Hole 22a Lower surface 24 Color measuring instrument 27 Optical fiber 28 Tube body 31 Transparent body 31a Lower surface

Claims (3)

[Claims] 1. A method for continuously inspecting a molten resin in which the optical information of the molten resin in the extruder (1) is inspected through a color measuring device (24). Via an optical information extracting means (21) mounted in a hole (22) formed in a molten resin passage formed of a die (8) and a cylinder (3) which are formed and coupled to each other through a die plate (20). A method for continuously inspecting a molten resin, characterized by obtaining the optical information. 2. A continuous inspection apparatus for molten resin, wherein the optical information of the molten resin in the extruder (1) is inspected through a color measuring device (24). A hole (22) provided in a molten resin passage formed of a die and a cylinder, which are formed and connected to each other via a breaker plate (20); and a tube body (28) screwed into the hole (22). A transparent body (31) and an optical fiber (27) provided in the tube body (28), and the optical information is obtained through the transparent body (31) and the optical fiber (27). A continuous inspection device for molten resin characterized by the above. 3. The transparent body (31) has a tapered surface (30) formed in the axial direction, and has a lower surface (31a) of the transparent body (31) and a lower surface (22a) of the hole (22). 3. The continuous inspection apparatus for molten resin according to claim 2, wherein is located substantially flush.