JP4481382B2 - Cooling device for synthetic resin articles - Google Patents

Description

[0001]
[Prior art]
The present invention relates to a cooling device for a synthetic resin article such as a synthetic resin container lid, and more particularly, but not limited to, a synthetic resin article taken out of a molding machine such as an injection molding machine or a compression molding machine. The present invention relates to a cooling device for cooling to a temperature suitable for secondary processing or product inspection.
[0002]
[Prior art]
As is well known to those skilled in the art, a synthetic resin article such as a synthetic resin container lid is usually molded by injecting a heat-smelted synthetic resin into a mold or compressing it with the mold. The molded synthetic resin article is cooled to a required temperature (for example, about 70 to 80 ° C.) in the mold after injection or compression, and then the mold is opened and taken out from the mold. In many cases, the molded synthetic resin article is further subjected to secondary processing such as cutting, combination with other parts, or printing, or an inspection as to whether or not it is properly molded. However, when the molded synthetic resin article is subjected to secondary processing or inspection, in order to reliably avoid deformation or damage of the molded synthetic resin article, the synthetic resin article is further removed, for example, at room temperature or higher. It is necessary to cool to the following temperature (it takes a very long time to cool to near room temperature in the mold). Therefore, conventionally, the synthetic resin article taken out from the mold is stored in a relatively large storage tank for a relatively long time, and thus the synthetic resin article is cooled to a required temperature.
[0003]
[Problems to be solved by the invention]
Thus, in the conventional manner as described above, secondary processing or printing is performed because it is necessary to store the synthetic resin article in the storage tank for a relatively long time. The efficiency of the manufacturing process including it becomes considerably low. Also, it is necessary to equip the required number of storage tanks, which not only increases the initial equipment cost, but also requires a relatively large space. Furthermore, even if the mold is cooled to the required temperature, a considerable latent heat is often left in the synthetic resin article, and therefore the synthetic resin article stacked in the storage tank may be deformed. Not a few.
[0004]
The present invention has been made in view of the above facts, and its main technical problem is that an excessive amount of synthetic resin articles taken out of a molding machine are transported to a required position for secondary processing or inspection. It is an object of the present invention to provide a cooling device for a synthetic resin article that can be effectively cooled to a required temperature, for example, room temperature or lower, in a relatively short time without requiring a space.
[0005]
[Means for Solving the Problems]
According to the present invention, as a cooling device that achieves the main technical problem, a cooling housing having a cold air inlet and a cold air outlet and a cold air blowing means for blowing cold air into the cooling housing through the cold air inlet A plurality of buckets moved through a circulation path defined in the cooling housing, and a synthetic resin article supply means for supplying a plurality of synthetic resin articles to be cooled into the bucket in the article supply area A synthetic resin article discharging means for discharging a plurality of cooled synthetic resin articles in the bucket to the outside of the housing in the article discharge area; a plurality of wheels; An endless wrapping transmission node extending along the bucket, the bucket being pivotally mounted to the wrapping transmission node, and outside the article discharge area It is maintained by the weight proper upright condition, wherein the bucket is moved by driving the winding transmission section, a cooling device for the synthetic resin article is provided.
[0006]
In a preferred embodiment, the synthetic resin article discharge means inverts the bucket while the bucket is moved through the article discharge area, and drops a plurality of cooled synthetic resin articles in the bucket downward. Let me. Preferably, the winding transmission section in the article discharging zone extends in a semicircular arc to the lowest end near the one uppermost vicinity of of the plurality of the wheel, the synthetic resin article discharging means of the wheel It is composed of a disc integrally formed with the one, and it is preferable that the bucket is inverted by acting on the bottom surface of the bucket that can be moved in the article discharge area.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of a cooling apparatus constructed according to the present invention will be described in more detail with reference to the accompanying drawings.
[0008]
Referring to FIG. 1, the cooling device shown includes a cooling housing generally designated 2. The cooling housing 2 includes a rectangular parallelepiped main portion 4 elongated in the vertical direction, a rectangular parallelepiped left protruding portion 6 projecting leftward from the lower end of the main portion 4, and a lower portion of the main portion 4. In FIG. 1, a rectangular parallelepiped right protruding portion 8 that protrudes rightward is included. As clearly shown in FIG. 2, the left side wall 10 of the main part 4 is defined with two relatively large windows 12 made of transparent or translucent glass or synthetic resin, and through these windows. The inside of the housing 2 can be visually observed. As can be understood by referring to FIGS. 3 and 4, the right side surface of the right protrusion 8 opens and closes between a closed position indicated by a solid line in FIGS. 3 and 4 and an open position indicated by a two-dot chain line in FIG. 4. It is defined by a movable door 14, and the inside of the housing 2 can be accessed by opening the door 14. As can be understood by referring to FIG. 3, the door 14 is also defined with a window 15 made of transparent or translucent glass or synthetic resin. 1 and 2, the seven rotation shafts 20, 22, 24, 26, 28, 30, and 32 rotate between the front wall 16 and the rear wall 18 of the cooling housing 2. It is installed freely. Sprocket wheels 34 are fixed to both ends of the rotating shaft 20, sprocket wheels 36 are fixed to both ends of the rotating shaft 22, and sprocket wheels 38 are fixed to both ends of the rotating shaft 24. A sprocket wheel 40 is fixed to the end, a sprocket wheel 42 is fixed to both ends of the rotating shaft 28, a sprocket wheel 44 is fixed to both ends of the rotating shaft 30, and a sprocket is fixed to both ends of the rotating shaft 32. A wheel 46 is fixed. An endless chain 48 is wound around the sprocket wheels 34, 36, 38, 40, 42, 44 and 46 located adjacent to the front wall 16 of the cooling housing 2, and also adjacent to the rear wall 18 of the cooling housing 2. An endless chain 48 is also wound around the sprocket wheels 34, 36, 38, 40, 42, 44, and 46 located at the positions. One end of the rotating shaft 28 penetrates through the front wall 16 and protrudes out of the cooling housing 2, and a sprocket wheel 50 is fixed to the protruding end. As clearly shown in FIGS. 1 and 3, an electric motor 52 is disposed on the right protruding portion 8 of the housing 2, and a sprocket wheel 54 is fixed to the output shaft of the motor 52. An endless chain 56 is wound around the sprocket wheels 50 and 54. As will be further described later, the motor 52 is intermittently driven, and the endless chain 48 disposed in the cooling housing 2 is intermittently driven in the direction indicated by the arrow 58. In the illustrated example, a winding transmission mechanism composed of a sprocket wheel and an endless chain is used. However, if desired, for example, a belt wheel is used as a wheel and an endless belt is used as a winding transmission node. Other forms of wrapping transmission mechanisms can also be used.
[0009]
1 and 2 together with FIG. 5, the description will be continued with reference to FIG. 5 between the pair of endless chains 48 located in the cooling housing 2 at a distance in the front-rear direction. A plurality of buckets 60 are mounted. Each of the buckets 60 has a bottom wall 62, both side walls 64, and front and rear walls 66, and the upper surface thereof is open. Conveniently, the bottom wall 62, the side walls 64, and the front and rear walls 66 of the bucket 60 are formed from a thin metal plate having a number of openings 68 formed therein. The upper part of the front and rear walls 66 of the bucket 60 is formed in an isosceles triangle shape, and a pin 70 that extends substantially horizontally is rotatably attached to the upper end of the front and rear walls 66. Then, by fixing the pair of pins 70 to the pair of endless chains 48, the bucket 60 is rotatably mounted between the pair of endless chains 48 around the pin 70. Each of the buckets 60 is normally maintained in an upright state (that is, a state in which the upper surface is opened) illustrated in FIG. 5 by its own weight.
[0010]
When the endless chain 48 is intermittently driven by the motor 52 as described above, each of the buckets 60 is moved intermittently through the circulation path defined by the endless chain 48. As shown in FIG. 1, an article supply area 72 and an article discharge area 74 are defined in the circulation path defined by the endless chain 48.
[0011]
Referring mainly to FIG. 1, synthetic resin article supply means 76 is disposed in association with the article supply area 72 in the circulation path of the bucket 60. In the illustrated example, an opening 80 is formed in the left side wall 78 of the left protrusion 6 of the cooling housing 2, and the synthetic resin article supply means 76 has a downstream end passing through the opening 80 and entering the cooling housing 2. The conveyor belt means 82 is made to enter. A carrying-in housing 84 is attached to the carrying belt means 82 so as to surround the carrying belt means 82 and extend elongated. The carry-in housing 84 may be a cylinder having a rectangular cross-sectional shape, and its outer shape is advantageously substantially the same as the shape of the opening 80. An appropriate sealing means can be disposed between the opening 80 and the carry-in housing 84. The downstream end of the conveyor belt means 82 protrudes beyond the downstream end of the carry-in housing 84, and the upstream end of the conveyor belt means 82 also protrudes beyond the upstream end of the housing 84, although not shown. It has been. At the upstream end of the conveying belt means 82, for example, about 20 to 30 synthetic resin articles such as synthetic resin container lids taken out from a mold of an appropriate molding machine such as an injection molding machine or a compression molding machine are used. Each batch is placed on the conveyor belt means 82 as a batch. A batch of synthetic resin articles placed on the conveyor belt means 82 is conveyed into the cooling housing 2 and supplied from the upstream end of the conveyor belt means 82 into the bucket 60 positioned in the article supply area 72. . The conveyance of the batch of the synthetic resin article by the conveying belt means 82 and the intermittent movement of the bucket 60 are synchronized with each other, and one batch of the synthetic resin article is stopped while each bucket 60 is stopped in the article supply area 72. Is supplied.
[0012]
In the article discharge area 74 in the circulation path of the bucket 60, the synthetic resin article in the bucket 60 is discharged out of the cooling housing 2 by the action of the synthetic resin article discharge means 86. In the illustrated example, in the article discharge area 74, the bucket 60 has a semicircular arc shape from the vicinity of the uppermost end of the pair of sprockets 42 to the vicinity of the lowermost end, along the outer periphery of the right half of FIG. It can be moved. As clearly understood by referring to FIG. 6 together with FIG. 1, the synthetic resin article discharging means 86 is composed of a relatively small-diameter disk integrally formed on the inner side surface of each of the pair of sprocket wheels 42. When the bucket 60 is moved in a semicircular arc shape in the article discharge area 74, it acts on or contacts with the bottom wall 62 of each bucket 60 to limit the pivoting of the bucket 60 about the pin 70. Each of the buckets 60 is changed from an upright state to an inverted state (a state in which the opened upper surface faces downward), and the synthetic resin article in the bucket 60 is dropped downward. The bottom surface of the right protruding portion 8 in the cooling housing 2 is opened over the whole to constitute a discharge opening 88, and the synthetic resin article dropped from the bucket 60 is discharged out of the cooling housing 2 through the discharge opening 88. I'm damned. The synthetic resin article discharged out of the cooling housing 2 is stored in an appropriate storage tank (not shown), or is transported to a secondary processing area or an inspection area by an appropriate transport means. When the bucket 60 is conveyed further downstream from the article discharge area 74, in other words, further conveyed downstream from the vicinity of the lowermost end of the sprocket wheel 42, and the bucket 60 is no longer affected by the synthetic resin article discharge means 86, Return to standing.
[0013]
As understood from FIGS. 2 to 4, a cold air introduction port 90 is formed in the lower portion of the rear wall 18 of the cooling housing 2, and an introduction hood 92 extending outward from the cold air introduction port 90 is attached. . A cold air blowing means 94 is connected to the introduction hood 92. The cool air sending means 94 includes, for example, a cooler, a blower, and a filter member. Blow. On the other hand, a cooling air outlet 98 is formed in the upper surface wall 96 of the main portion 4 of the cooling housing 2. The cold air outlet 98 is conveniently provided with a filter member 100 which may be a non-woven fabric having a steel mesh on both sides, for example.
[0014]
It is as follows when the effect | action of the cooling device as mentioned above is summarized and demonstrated. Endless chain 48 is intermittently driven in the direction indicated by arrow 58, and each of buckets 60 is sequentially positioned in article supply area 72. Then, one batch of synthetic resin article (for example, 20 to 30 synthetic resin container lids) is supplied from the synthetic resin article supply means 76 into the bucket 60 positioned in the article supply area 72. While the bucket 60 supplied with the synthetic resin article is intermittently advanced and moved from the article supply area 72 to the article discharge area 74, the cold air introduced into the cooling housing 2 from the cold air inlet 90 is the bucket 60. Acting on the synthetic resin article in the bucket 60 from the open top surface of the bucket 60 and also through a number of openings 68 formed in the bottom wall 62, the side walls 64 and the front and rear walls 66 of the bucket 60. Effectively cooled. The main part of the cool air introduced from the cool air inlet 90 is raised from the main part 4 of the cooling housing 2 and discharged from the cool air outlet 98. A part of the cool air introduced from the cool air introduction port 90 flows to the right protruding portion 8 of the cooling housing 2 and is discharged from the discharge opening 88. In the article discharge area 74, as described above, the bucket 60 is inverted to the inverted state by the action of the synthetic resin article discharge means 86, and the synthetic resin article cooled to, for example, room temperature or lower by the action of the cold air. Is discharged from the cooling housing 2 through the discharge opening 88.
[0015]
【The invention's effect】
According to the cooling device of the present invention, the synthetic resin article taken out from the molding machine is effectively cooled in a relatively short time without requiring an excessive space or the like, for example, to a required temperature of room temperature or lower. can do.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view illustrating a preferred embodiment of a cooling device constructed in accordance with the present invention.
FIG. 2 is a left side view of the cooling device shown in FIG.
FIG. 3 is a right side view of the cooling device shown in FIG.
4 is a plan view of the cooling device shown in FIG. 1. FIG.
FIG. 5 is a partial perspective view showing a bucket in the cooling device shown in FIG. 1;
6 is a partial perspective view showing a synthetic resin article discharging means in the cooling device shown in FIG. 1. FIG.
[Explanation of symbols]
2: Cooling housing 34: Sprocket wheel 36: Sprocket wheel 38: Sprocket wheel 40: Sprocket wheel 42: Sprocket wheel 44: Sprocket wheel 46: Sprocket wheel 48: Endless chain 60: Bucket 72: Article supply area 74: Article discharge area 76 : Synthetic resin article supply means 82: Conveyor belt means 86: Synthetic resin article discharge means 90: Cold air inlet 94: Cold air blowing means 98: Cold air outlet

Claims (3)

A cooling housing having a cold air inlet and a cold air outlet, cold air blowing means for blowing cold air into the cooling housing through the cold air inlet, and a plurality of units moved through a circulation path defined in the cooling housing Bucket, synthetic resin article supply means for supplying a plurality of synthetic resin articles to be cooled in the bucket in the article supply area, and a plurality of cooled synthetic resin articles in the bucket in the article discharge area A synthetic resin article discharging means for discharging the outside of the housing, a plurality of wheels, and an endless winding transmission node that is wound around the wheels and extends along the circulation path. It is pivotably mounted on the hanging transmission node and is kept upright by its own weight outside the article discharge area, and drives the winding transmission node. Thus the bucket is moved, a cooling device for the synthetic resin article. The synthetic resin article discharging means allowed inverted the bucket while the bucket is moved through the article discharge zone, allowed to fall cooled plurality of synthetic resin articles in the bucket downwardly claim 1 Symbol The cooling device. In the article discharge area, the winding transmission node extends in a semicircular arc shape from the vicinity of the uppermost end of one of the plurality of wheels to the vicinity of the lowermost end thereof, and the synthetic resin article discharge means includes the first of the wheels. The cooling device according to claim 2 , wherein the cooling device is configured by a disk integrally formed with a piece and acts on a bottom surface of the bucket that is moved in the article discharge area to invert the bucket.

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