JPH072182Y2 - Gas and water removal equipment for synthetic resin molding machines - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) This invention is generated in a synthetic resin molding machine when the synthetic resin molding material is fed to a screw of the synthetic resin molding machine and melted. The present invention relates to a device for removing gas, water, etc.

(Prior art) If the removal of gas, water, etc. generated from the above-mentioned melting region during the synthetic resin molding process is insufficient, silver strips, cavities, etc. will occur in the synthetic resin molded product produced by the molding machine. It may cause product defects. Therefore, it is necessary to discharge and remove such gas and water from the system.

Conventionally, as a device for removing gas, moisture, etc. for a synthetic resin molding machine of this kind, various pipes for exclusive use of degassing have been proposed in the hopper. There are new problems such as clogging of materials from.

As a means of overcoming such problems, there is known one disclosed in Japanese Utility Model Publication No. 58-35457, which is related to the application of the present applicant. This product has a connection flange with the hopper on the upper surface and a slide groove of the shutter that opens and closes the inflow of material from the hopper, a connection flange with the material supply port of the molding machine on the lower surface, and a residual material on the side surface. And a gas vent hole having a release port is provided above the discharge port.

(Problems to be Solved by the Invention) However, the above-mentioned conventional example disclosed in Japanese Utility Model Publication No. 58-35457 does not allow the length of the gas vent hole to be arbitrarily adjusted. Depending on the pressure condition near the discharge port and the discharge port, the removal of gas, water, etc. may not be fully performed.

This invention solves the above-mentioned problems of the above-mentioned conventional example.
An object of the present invention is to provide a material introduction pipe which has a function of separating a molding material and a gas and which has a simple structure in which the stroke length is adjustable in the upper body so as to eliminate all the problems.

(Means for Solving the Problem) As a means for solving the above problems, the present invention communicates with an upper body that is connected to a material outlet of a material supply hopper and a material supply port of a synthetic resin molding machine. It is composed of a cylindrical lower body connected to the upper body and a material introducing pipe that is hung vertically from the upper body and faces the material passage of the cylindrical lower body. The material introducing pipe can adjust the stroke length of the upper body. And a space surrounded by the material introducing pipe, the upper body, and the inner wall of the cylindrical lower body is used as a gas vent hole.

Further, the material introducing pipe may be detachably formed on the upper body.

The gas vent hole may be one that naturally discharges the gas, water, etc. generated from the synthetic resin molding machine to the outside of the system, but it is preferable to connect it to a suction air source such as a blower and forcibly discharge it. . A plurality of gas vent holes may be provided, and at least one of the gas vent holes may be formed so as to supply an auxiliary material to an additive or the like.

A residual material discharge port may be formed in the tubular lower body.

(Operation) According to the present invention having the above-described configuration, the material introducing pipe is provided in the upper body, and the space surrounded by the material introducing pipe, the upper body, and the inner wall of the cylindrical lower body. As a gas vent hole, the material introduction pipe introduces and supplies the molding material from the material supply hopper to the material supply port of the synthetic resin molding machine, as well as the gas generated near the melting area of the molding material in the synthetic resin molding machine. Moisture and the like are separated, and the gas and moisture are forcedly discharged out of the system through the gas vent hole by natural exhaust or by the suction action of the suction air source.

Moreover, since the material introduction pipe is provided on the upper body so that the stroke length can be adjusted, by appropriately adjusting the hanging length of the material introduction pipe, the physical properties of the molding material and the vicinity of the material supply port of the synthetic resin molding machine can be adjusted. By appropriately responding to pressure fluctuations and the like, it is possible to greatly enhance the efficiency of discharging and removing the gas, water and the like.

In the above case, since the material introduction pipe provided in the upper body is vertically provided in the upper body and faces the material passage of the cylindrical lower body, the material flowing down from the material supply hopper is Since the material introducing pipe is naturally dropped by the pressure, the material is not discharged from the gas vent hole to the outside of the system, or the material is not blocked in the gas vent hole.

In addition, because there is ventilation resistance during the material flow in the material introduction pipe, hot air (dry air) supplied from the material supply hopper.
Is less likely to be discharged to the outside of the system through the gas vent hole.

Therefore, according to this invention, the gas and water generated from the synthetic resin molding machine are stably and efficiently removed, so that the product does not have silver strips or cavities and the product defect rate is reduced. can do.

(First Embodiment) A first embodiment of the present invention will be described below with reference to FIG.

(1) is a material supply hopper, (2) is a heating source for dehumidifying and drying moist gas such as air in the atmosphere, and the gas dehumidified and dried by this heating source (2) is an air supply pipe (3 ) To the material supply hopper (1) to dehumidify and dry the molding material such as the synthetic resin raw material of the material supply hopper (1).

Reference numeral (10) is a device for removing gas, water and the like generated in the screw (32) portion which is a melting region of the molding material of the synthetic resin molding machine (30). Equipment for removing this gas and water (10)
Communicates with the material supply port (31) of the synthetic resin molding machine (30) and the upper body (11) that communicates with the material outlet (4) of the material supply hopper (1) and is connected by flange coupling or the like. A tubular lower body (12) connected by a flange connection and the like, and a material introducing pipe (13) vertically extending from the upper body (11) and facing the material passage (12a) of the tubular lower body (12). Are formed from. The upper body (11) and the cylindrical lower body (12) may be integrally formed as shown in the figure, or may be formed by joining the divided bodies.

The upper body (11) has a flange (11) connected to a flange (5) formed at the lower end of the material supply hopper (1).
a) and a material guide tube (11c) of arbitrary shape that communicates with the material outlet (4) of the material supply hopper (1).

The tubular lower body (12) is the material guide tube (11) of the upper body (11).
The material passage (12a) and its material outlet (12b) are made larger than the outer diameter of c), and the material supply port (31) of the synthetic resin molding machine (30).
And a flange (12c) connected to the synthetic resin molding machine (30) so as to communicate with the same.

The material introduction pipe (13) is the material guide tube (11c) of the upper body (11).
The stroke length (L) from the lower surface of the is adjustably provided in the upper body (11) and is surrounded by the material introduction pipe (13), the upper body (11) and the inner wall of the cylindrical lower body (12). The open space is used as a gas vent hole (16). The specific structure for adjusting the stroke length of the material introducing pipe (13) with respect to the upper body (11) is a screwing type with both male and female screws, an engaging type with an engaging member provided in multiple steps, and a spring is used. It can be designed arbitrarily such as a spring type.

For example, the screw-type structure will be described with reference to FIG. 1. The material introducing pipe (13) is a tube having a large diameter in the upper part and a small diameter in the lower part, and a male screw is formed on the upper part of the material introducing pipe (13). (Four
3) has been formed. On the other hand, a female screw (41) is formed on the material guide cylinder (11c) of the upper body (11), and the female screw (41) and the male screw (43) of the material introducing pipe (13) are screwed together. There is. Therefore, the stroke length (L) from the lower surface of the material guide tube (11c) of the upper body (11) to the lower end of the material introducing pipe (13) is determined by the male and female screws (41) and (43). It becomes shorter by screwing (13) and becomes longer by unthreading.

Further, the material introducing pipe (13) can be detachably formed with respect to the upper body (11). According to such a configuration,
By removing the material introduction pipe (13), the cylindrical lower body (1
2) and the inside of the upper body (11) or the material introduction pipe (13) itself can be easily washed, and the material introduction pipe (13) can be easily replaced.

In this embodiment, two gas vent holes (16) are formed. A suction air source (18) such as a vacuum pump or a blower is connected to one side of the gas vent holes (16) and (16) through an exhaust pipe (17), and the gas vent holes ( From 16), auxiliary materials such as additives and other synthetic resin raw materials contained in the auxiliary material tank (20) are supplied through the transport pipe (21) and the like. According to this structure, there is an advantage that the sub-material can be sucked and transported into the tubular lower body (12) from at least one of the plurality of gas vent holes (16) ... (16). However, it is also possible to provide a large number of gas vent holes (16) and supply the auxiliary material from two or more of them.

In this embodiment, the cylindrical lower body (12) has a residual material discharge port (2
3) is formed, and the residual material discharge port (23) is opened and closed by a damper or other valve mechanism (24). When discharging the residual material, the material introducing pipe (13) can be screwed up to open the valve mechanism (24) to discharge the residual material, and the material introducing pipe (13)
Even if is located below the residual material discharge port (23), the residual material can be discharged from the residual material discharge port (23) with suction air, and the design can be changed appropriately. With such a configuration, the residual material can be easily discharged at the time of material change or cleaning, which is extremely convenient. Further, air can be sent from the residual material discharge port (23) to clean the gas vent hole (16) and the like. Needless to say, it is also possible to implement the one in which the residual material discharge port (23) is not provided.

The length and shape of the material introducing pipe (13) are not limited to those shown in FIG. 1, and for example, the tubular lower body (1
It may be hung down to the material outlet (12b) of 2) or may be hung down near the screw (32) of the molding machine (30),
The hanging length of the material introducing pipe (13) is arbitrary.

A filter (25) is provided at an appropriate position of the gas vent hole (16) to prevent clogging of a secondary material or the like from the gas vent hole (16) on the other side.

In the embodiment, the gas vent hole (16) is connected to the suction air source (18) so that the suction force of the suction air source (18) sucks and removes gas, moisture, etc. generated from the synthetic resin molding machine or the like. The exhaust pipe (17) is used instead of this structure.
Is directly connected to the air source (7), or if a honeycomb dehumidifier or the like (not shown) is used as dehumidifying / drying means for the air supply pipe (3), a drying blower or a regenerative blower for the honeycomb dehumidifier is used. Etc. can also be connected.

In addition, (7) is an air source, and the outside air sucked by this is dehumidified and dried by the heating source (2) and the dried air is sent into the material supply hopper (1). (22) is the upper body (1
A shutter which is fitted in the slide groove (11b) of 1) to open and close the material outlet (4) of the material supply hopper (1),
Instead of the shutter (22), another on-off valve mechanism may be used, or one without this may be implemented.

(Second Embodiment) FIG. 2 shows a second embodiment. This is different from the one shown in FIG. 1 in the lower part of the material supply hopper (1), the air supply pipe (3) and the other side of the gas vent hole (16) formed in the gas and water removing device (10). The configurations of are significantly different,
Other configurations are substantially the same as in FIG. That is,
In the funnel part (1a) under the material supply hopper (1),
A substantially funnel-shaped insert (9) is installed in a state where the funnel portion (1a) and a space (8) are formed inside thereof, and a feed connected to an air source (7) and a heating source (2). The trachea (3) is inserted from the body part of the material supply hopper (1), and the gas vent hole (16) on the other side is closed by a stopper or a valve (26) to form a synthetic resin molding machine (30). The gas, water, etc. generated from the () side are discharged to the outside of the system through the gas vent hole (16) on one side.

Also in this embodiment, as shown in FIG. 2, the material introduction pipe (1
3) The stroke length (L) is short or long by screwing or unscrewing the material guide cylinder (11c) of the upper body (11) with both male and female screws (41) and (43). It can be adjusted to

(Third Embodiment) FIGS. 3A and 3B show a third embodiment. This is a material supply hopper (1) similar to that of the second embodiment.
And that the material introduction pipe (13) that is detachable from the upper body (11) and the residual material discharge port (23) and valve mechanism (24) shown in FIGS. 1 and 2 are not provided. It has remarkable features. That is, as shown in FIG. 3B, the material introducing pipe (13) has a flange portion (13a) on the upper side and a cylindrical portion (1) on the lower side.
3b) is formed, the flange portion (13a) is detachably hung in the slide groove (11b) of the upper body (11), and the shutter (22) is placed on the flange portion (13a). Open and close. In this way, the material introduction pipe (13) is connected to the upper body (11).
If the material introduction pipe (13) is detachable, it is easy and convenient to clean the material introduction pipe (13) or replace it with one having a different length.

To adjust the hanging length of the material introducing pipe (13), prepare a plurality of dimensional lengths having different structures as shown in FIG. 3 (B) as described above, and adjust as necessary. Attaching a length of the material introduction pipe (13), or another material introduction pipe (13 ') at the lower part of the tubular portion (13b) of the material introduction pipe (13) as shown in FIG.
Can be sequentially connected.

Further, the material introducing pipe (13), that is, the cylindrical portion (13b) is provided with a synthetic resin molding machine (3) as shown by a chain line (a) in FIG. 3 (A).
It can also be hung down near the screw (32) of (0). In the material introduction pipe (13) shown by the solid line, in the figure, the chain line (a)
It is also possible to vertically move the material introduction pipe (13 ') shown in (4) so that the height can be adjusted. L in FIG. 3 (A)
As described above, indicates the stroke length between the lower surface of the upper body (11) and the lower end of the material introducing pipe (13).

Further, the residual material discharge port (23) may be formed in the third embodiment as in the above-described embodiments.

(Modification) The material introduction pipe (13) does not have any shape or length as described above, and the joining method thereof is also arbitrary.

The supply of hot air to the material supply hopper (1) is not limited to the pressure-feed type air source (7) as shown in each embodiment, and for example, a suction-type air source (7) may be provided at an appropriate position of the material supply hopper (1). ) May be attached to supply hot air from the opposite side of the suction type air source (7).

The number of the gas vent holes (16) is not limited to two as shown in each figure, and it is needless to say that the number may be one or three or more.

The shutter (22) can be formed on the material supply hopper (1) side without being formed on the upper body (11), and this is not essential.

(Effects of the Invention) The present invention has an upper body connected to a material outlet of a material supply hopper, a cylindrical lower body connected to a material supply port of a synthetic resin molding machine, and an upper body. And a material introduction pipe that is vertically installed and faces the material passage of the cylindrical lower body,
The material introducing pipe is provided in the upper body so that the stroke length can be adjusted, and the space surrounded by the material introducing pipe, the upper body, and the inner wall of the cylindrical lower body serves as a gas vent hole. Have a significant effect.

(1) The material introducing pipe is provided in the upper body, and the space surrounded by the material introducing pipe, the upper body, and the inner side wall of the cylindrical lower body serves as a gas vent hole. While introducing and supplying the molding material from the hopper to the material supply port of the synthetic resin molding machine, the gas and moisture generated from the vicinity of the melting area of the molding material in the synthetic resin molding machine is separated from the material, and the gas vent hole is used. The gas, water and the like can be forcibly discharged stably and reliably out of the system by natural exhaust or by the suction action of the suction air source.

(2) Since the material introduction pipe is provided on the upper body so that the stroke length can be adjusted, the physical properties of the molding material and the vicinity of the material supply port of the synthetic resin molding machine can be adjusted by appropriately adjusting the hanging length of the material introduction pipe. Since it can respond appropriately to pressure fluctuations in
The efficiency of discharging and removing the gas, water, etc. can be greatly enhanced.

(3) In the above case, since the material introducing pipe provided in the upper body is vertically provided in the upper body and faces the material passage of the tubular lower body, the material flowing down from the material supply hopper is Since the material introducing pipe is naturally dropped by the pressure of the material,
The material is not discharged to the outside of the system through the gas vent hole, or the material is not blocked in the gas vent hole.

In addition, because there is ventilation resistance during the material flow in the material introduction pipe, hot air (dry air) supplied from the material supply hopper.
Is less likely to be discharged to the outside of the system through the gas vent hole.

(4) Therefore, according to this invention, not only the material supplied from the material supply hopper can be smoothly supplied to the material supply port of the synthetic resin molding machine by the separation action of the material of the material introduction pipe and the gas, but also the material can be synthesized. Since the gas, water, etc. generated from the resin molding machine are stably and efficiently removed, silver strips, cavities, etc. do not occur in the molded product, and the defective rate of the product can be reduced.

It should be noted that if the configuration described in the claims (2) to (5) of the utility model registration is adopted, the effect as described above can be obtained.

[Brief description of drawings]

Each of the figures shows an embodiment of this invention. 1 is a vertical sectional view of the first embodiment, FIG. 2 is a vertical sectional view of the second embodiment, and FIG.
FIG. 3A is a longitudinal sectional view of the third embodiment, and FIG. 3B is a perspective view of the material introducing pipe of FIG. (1) …… Material supply hopper, (4) …… Material outlet,
(10) …… Gas and moisture removal device, (11) …… Upper body, (12) …… Cylinder lower body, (12a) …… Material passage, (1
2b) …… Material outlet, (13) …… Material introduction pipe, (16) ……
Degassing hole, (18) …… Suction air source, (20) …… Sub-material tank, (23) …… Residual material discharge port, (30) …… Synthetic resin molding machine, (32) …… Screw.

Claims (5)

[Scope of utility model registration request] 1. A material outlet (4) of a material supply hopper (1).
To the upper body (11) connected to the upper body (11), the cylindrical lower body (12) connected to the material supply port (31) of the synthetic resin molding machine (30), and the upper body (11). A material introduction pipe (13) that is vertically installed and faces the material passage (12a) of the tubular lower body (12).
The material introduction pipe (13) is provided in the upper body (11) so that the stroke length can be adjusted, and the material introduction pipe (13), the upper body (11) and the tubular lower body (12) are inside. A device for removing gas, moisture, etc. for a synthetic resin molding machine, characterized in that a space surrounded by a wall is provided as a gas vent hole (16). 2. The gas for a synthetic resin molding machine according to claim 1, wherein the material introducing pipe (13) is formed so as to be attachable to and detachable from the upper body (11). A device for removing water, etc. 3. The gas and moisture for a synthetic resin molding machine according to claim (1) or (2), wherein the gas vent hole (16) is connected to a suction air source. Etc. removal device. 4. The utility model registration claims (1) to (1), wherein a plurality of the gas vent holes (16) are provided, and at least one of the gas vent holes is formed so as to supply an auxiliary material such as an additive. A device for removing gas, moisture, etc. for a synthetic resin molding machine according to any one of (3). 5. A utility model registration claim (1) in which a residual material discharge port (23) is formed in the tubular lower body (12).
Item 5. A device for removing gas, moisture, etc. for a synthetic resin molding machine according to any one of items (4) to (4).