JPH04137826U - Extruder breaker plate device - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention relates to a breaker plate device for an extruder, and is particularly characterized in that it attempts to stabilize the resin temperature of molten resin extruded from a screw. [Structure] The breaker plate device according to the present invention transfers the molten resin extruded from the screw (1) of the cylinder (2) to the die plate (6) side through the molten resin guide hole (4) of the breaker plate (5). In the breaker plate device of the extruder for guiding the breaker plate to the breaker plate holder (20) provided at the tip (2c) of the cylinder (2), the breaker plate holder (20) is inserted into the inner diameter part of the breaker plate holder (20). The breaker plate holder (20) is provided with a heat medium inlet (20A) and a heat medium outlet (20B), and the breaker plate (5) is provided with a molten resin. A heat medium guide hole (22) is provided adjacent to the guide hole (4) and the molten resin guide hole (4) and does not intersect with the molten resin guide hole (4). This is a configuration in which the heating medium inlet (20A) and the heating medium outlet (20B) are communicated with each other.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a breaker plate device for an extruder, particularly for extrusion from a screw. The present invention relates to a novel improvement for adjusting the resin temperature of molten resin to a desired temperature.

0002

[Conventional technology]

There are various types of breaker plate devices for this type of extruder that have been used in the past. There are some representative ones among them, for example, JP-A-1988- The configuration disclosed in Japanese Patent No. 262622 can be shown in FIG. That is, the one indicated by the reference numeral 1 in FIG. 4 has a heater 2a on the outer circumference. It is a screw rotatably provided in the cylinder 2, and the end 2b of the cylinder 2 A ring-shaped flange 3 is fitted around the outer periphery of the ring.

0003 A plurality of molten resins are formed in the cutout step 2ba formed at the end 2b of the cylinder 2. A breaker plate 5 having a guide hole 4 is attached to the breaker plate 5. A die plate 6 having a first guide hole 6a is attached to the plate 5.

0004 The die plate 6 has a second guide hole 7a communicating with the first guide hole 6a. A die 8 is connected via a die holder 7. The die 8 has a lip hole 8a that communicates with the second guide hole 7a. , the molten resin extruded by the screw 1 is transferred to the molten resin plan of the breaker plate 5. Discharged to the outside through the inner hole 4, the first guide hole 6a, the second guide hole 7a, and the lip hole 8a. be done.

[0005]

[Problem that the idea aims to solve]

The breaker plate device of a conventional extruder was configured as described above. The following issues existed. In other words, the breaker plate itself is not provided with any forced temperature control means. The temperature of the molten resin passing through the molten resin guide hole was controlled to the desired temperature. It is extremely difficult to stabilize molding in subsequent processes. Met.

[0006] This invention was made to solve the above problems, and in particular, The temperature of the molten resin extruded from the tube can be adjusted to the desired temperature. The purpose of this invention is to provide a breaker plate device for an extruder.

[0007]

[Means to solve the problem]

The breaker plate device of the extruder according to the present invention is The discharged molten resin is passed through the molten resin guide hole of the breaker plate to die plate. In the breaker plate device of the extruder for guiding the cylinder to the and the breaker plate holder provided at the tip of the breaker plate holder. It consists of a breaker plate inserted and held in the inner diameter part of the holding body, and the breaker - The plate holder is provided with a heat medium inlet and a heat medium outlet, and the breaker plate is provided with a heat medium inlet and a heat medium outlet. The molten resin guide hole is adjacent to the molten resin guide hole and intersects with the molten resin guide hole. A heat medium guide hole is provided, and the heat medium guide hole, the heat medium inlet, and the heat medium outlet are connected to each other. This is a configuration that communicates with the

[0008]

[Effect]

In the breaker plate device for an extruder according to the present invention, the breaker plate Since the heat medium guide hole is formed adjacent to the molten resin guide hole in By circulating and supplying a heat medium such as cooling water to the holes, heat exchange is performed between the heat medium and the molten resin. The temperature of the molten resin can be adjusted to a desired temperature.

[0009]

【Example】

The following is a preferred implementation of the breaker plate device for an extruder according to the present invention along with drawings. An example will be explained in detail. Note that the same or equivalent parts as in the conventional example will be described with the same reference numerals. Figures 1 to 3 show a breaker plate device for an extruder according to the present invention. Figure 1 is a cross-sectional view, Figure 2 is an enlarged side view of the breaker plate, and Figure 3 is a cross-sectional view of Figure 2. It is a diagram.

0010 In FIG. 1, the cylinder 2 with a heater 2a on its outer periphery is indicated by the reference numeral 1. The screw is rotatably provided in the cylinder 2, and is formed in the end 2b of the cylinder 2. An annular flange 3 is fitted into the stepped portion 2bA.

[0011] Insert the breaker plate 5 into the notch recess 3a of the flange 3. One end 20a of the breaker plate holder 20 that has been inserted and held is fitted, and this breaker plate holder 20 is fitted. A die plate 6 is fitted onto the other end 20b of the car plate holder 20. Therefore, the breaker plate 20 is provided at the tip 2c of the cylinder 2. Ru.

0012 A heat medium inlet 20A and a heat medium outlet are provided at the outer peripheral position of the breaker plate holder 20. An opening 20B is formed, and these heat medium inlet 20A and heat medium outlet 20B are connected to the brake. It communicates with the groove 20C formed on the outer periphery of the car plate 5 for guiding the heat medium. .

[0013] The breaker plate holder 20 and the breaker plate holder 20 are provided on the outer periphery of the breaker plate 5. An O-ring 21 is provided for tightly fitting and preventing leakage of the heat medium from the groove 20C. , a plurality of elongated molten resin guide holes 4 are formed in this breaker plate 5. and is adjacent to this molten resin guide hole 4 and intersects with this molten resin guide hole 4. A heat medium guide hole 22 is formed that is never in communication with the groove 20C and communicates with the groove 20C. There is.

[0014] The groove 20C and the heat medium guide hole 22 are configured as shown in FIGS. 2 and 3. The heat medium guide hole 22 is formed parallel to each of the molten resin guide holes 4 in the axial direction. At the same time, the inlet side of this breaker plate 5 is made of mesh or the like. A filter 25 is attached.

[0015] The molten resin guide hole 4 is connected to the cylinder chamber 2A of the cylinder 2 and the die plate. 6, and this first guide hole 6a communicates with the second guide hole 7a. It communicates with the lip hole 8a of the die 8 provided through the die holder 7 having Ru.

[0016] Next, in the above configuration, cooling water etc. from a heat medium supply source (not shown) is provided. When a heat medium is supplied from the heat medium inlet 20A, this heat medium flows through each heat medium port through the groove 20C. Heat returns from the inner hole 22 to the heat medium supply source via the heat medium outlet 20B, and returns to each heat medium guide hole 22. The medium can be circulated.

[0017] When the molten resin is extruded through the screw 1 in the above-mentioned state, this molten resin is supplied to the breaker plate 5 via the filter 25, and this breaker plate When passing through the molten resin guide hole 4 of No. 5, heat exchange with the heating medium takes place, and the temperature of this heating medium increases. By keeping the temperature at a predetermined level, the temperature of the resin supplied to the die 8 can be adjusted to a specified level. can be maintained at a constant temperature.

[0018] In addition, in the above-mentioned state, depending on the type of molten resin, the optimum resin temperature is set in die 8. It is possible to carry out high-yield molding. In addition, in the above-mentioned example, , each molten resin guide hole 4 has been described as a long hole, but it is not limited to this long hole. For example, it is mentioned that other hole shapes can be used, such as multiple round holes not shown. Of course.

[0019]

[Effect of the idea]

The extruder breaker plate device according to the present invention is constructed as described above. Therefore, the following effects can be obtained. In other words, a heat medium such as cooling water is supplied to the heat medium guide hole provided in the breaker plate. Since the temperature of the molten resin supplied to the die side can be freely controlled. It is possible to obtain the optimum resin temperature depending on the type of molding resin, and improve molding yield. can be significantly improved.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a breaker plate device of an extruder according to the present invention.

FIG. 2 is an enlarged side view of the breaker plate of FIG. 1;

FIG. 3 is a cross-sectional view of FIG. 2.

FIG. 4 is a sectional view showing a breaker plate device of a conventional extruder.

[Explanation of symbols]

1 screw 4 Molten resin guide hole 5 Breaker plate 6 Die plate 20 Breaker plate holder 20A heat medium inlet 20B Heat medium outlet 22 Heat medium guide hole

Claims (1)

[Scope of utility model registration request] Claim 1: Extrusion for guiding the molten resin extruded from the screw (1) of the cylinder (2) to the die plate (6) side through the molten resin guide hole (4) of the breaker plate (5). In the breaker plate device of the machine, the cylinder
The breaker plate holder (20) includes a breaker plate holder (20) provided at the tip (2c) of the breaker plate holder (2), and a breaker plate (5) inserted and held in the inner diameter part of the breaker plate holder (20). The plate holder (20) has a heat medium inlet (2
0A) and a heat medium outlet (20B), and the breaker plate (5) is provided with a molten resin guide hole (4) and a heat medium outlet (20B).
A heat medium guide hole (22) is provided adjacent to (4) and does not intersect with the molten resin guide hole (4), and includes the heat medium guide hole (22), the heat medium inlet (20A), and the heat medium outlet. (20B) A breaker plate device for an extruder, characterized in that it is in communication with (20B).