JP2005132522A - Shutter device for discharging powder particle element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent resinous powder particle elements from attaching or adhering to a part near a shutter device due to opening/closing of the shutter device on an opening portion at a hopper lower end or a structure therefor, and to prevent change in supplying amount of material resin and mixing of foreign matter, in a hopper device for supplying the resinous powder particle elements to a mold device and device manufacturing a molded article by pressurizing and heating. <P>SOLUTION: Guide plate on right and left sides in a moving direction of a shutter to open/close are not made in one long plate, but in an intermittent structure. Both end surfaces on the moving direction side of the shutter are prevented from contacting with a stopper, and a space of that portion is structured to open downward. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a granular material discharging shutter device, for example, a granular material is fixed to a discharging shutter device of a device that supplies a certain amount of granular material to a die or the like of a pressure molding device located below. The present invention relates to the structure of the shutter part that does not accumulate.

  When manufacturing a resin molded product, the shutter attached to the bottom of the raw material supply hopper located above is moved in the horizontal direction to open the bottom of the hopper, and the pressure molding device gold located below the shutter is opened. 2. Description of the Related Art It has been widely practiced to supply a certain amount of raw material resin particles by dropping them into a mold. This will be described with reference to FIG. (A) of this figure is a figure which shows the cross section of the center up-down direction along the moving direction of this shutter part, (B) is the figure which looked down from the part shown by the AA line of (A). It is. In this figure, reference numeral 10 denotes a shutter, and 11 denotes a position where the shutter is in a state where the lower end of the hopper is opened. Although not shown in the drawing, the end surface on the side opposite to the moving direction of the shutter in this state is located on the left side in the drawing with respect to the hopper portion 32 on the right side in the drawing. Reference numeral 25 denotes a guide plate. 30 is an upper flange, and 31 and 32 are left and right hopper walls in each figure. Reference numeral 35 denotes the inside of the hopper. 45 is a spacer flange. Reference numeral 50 denotes a lower flange, and reference numerals 51 and 52 denote lower discharge ducts on the left and right sides in each figure.

In practice, there are hopper wall surfaces on the upper four sides of the opening and lower discharge ducts on the lower four sides. However, these are self-evident and are not directly related to the gist of the present invention, and the drawings are also complicated, so that the illustrations with reference numerals are omitted. Further, the resin supply hopper, the resin itself inside, the hydraulic or pneumatic cylinder device for moving the shutter, and the pressure molding device are not directly related to the gist of the present invention. This is a well-known technique described in the following Patent Documents 1 to 4 and the like. For this reason, illustration and description thereof are also omitted.
Japanese Patent Publication No. 7-20631 Japanese Patent Publication No. 7-20633 Japanese Patent Publication No. 7-61550 JP 2001-235039 A

  As shown to (A) and (B) of this figure, the shutter is attached to the opening part of the hopper lower end so that it can move to right and left on the figure. For this reason, the shutter 10 is supported by a guide plate 25 under the shutter 10, and the guide plate 25 is supported by a lower flange 50. Further, the lower flange 50 and the upper flange 30 are fixedly coupled via a spacer flange 45. For this reason, the shutter and the guide rail are in a gap formed by sandwiching the spacer flange between the upper and lower flanges.

  (A) and (B) of this figure are states in which the shutter has moved to the left and the lower end of the hopper is closed. Then, when the shutter is pulled and moved by a hydraulic device (not shown) in the right direction in the figure as indicated by the arrow (B), the lower end of the hopper is opened, and the internal raw material resin particles fall downward. When the supply of the predetermined amount is completed, the shutter moves to the left in the figure, the lower end of the hopper is closed, and the original state shown in (A) and (B) is obtained.

  By the way, the raw material resin particles are apt to adhere to hoppers, shutters and the like due to their properties. This is especially true if there is a heating device below or in the vicinity. Moreover, even if the amount of adhesion at one time is small, if the number of times increases, the amount cannot be ignored. Furthermore, once it adheres, it will easily become large particles if any external force or pressing force is applied, and if this large diameter particle falls downward due to vibrations associated with opening and closing of the shutter, the resin to be supplied to the mold The amount is unnecessarily increased, which can often lead to objectionable occurrences such as product burrs. Furthermore, if any other dust, foreign matter or the like is adsorbed on the adhered resin powder itself, it may be extremely undesirable that foreign matter is mixed into the product.

In addition, when the product to be manufactured is changed and the raw material is changed as a result, the cleaning of the apparatus becomes troublesome if the raw material resin is adhered. In particular, since the shutter device has a complicated structure, the resin of the raw material tends to adhere to the shutter device. On the other hand, cleaning is also troublesome.
For this reason, this is especially true for hoppers with shutters that supply raw material resin granules for pressure molding equipment, but when opening and closing the lower shutter, it is difficult for resin granules to adhere to the equipment. However, it has been desired to develop a technique that is difficult to be pressed and that is difficult to grow into large-diameter grains.

  The present invention has been made for the purpose of solving the above-described problems. When the shutter is moved in the horizontal direction, the shutter is supported from below, and a notch is provided in the guide plate for guiding the movement. It is provided. The corners of the notches are rounded. In addition, the stop plate serving as a stopper and the shutter end portion are not normally in contact with each other and do not form a closed space when the shutter is reciprocated or moved in the horizontal direction. Further, the space formed on both end surfaces on the moving direction side of the shutter has a structure in which no member exists below the space. Further, the present invention has been devised in terms of the mutual position of both ends of the shutter in the moving direction and the end of the opening at the lower end of the hopper.

  Due to the above structure, the resin powder particles are difficult to adhere, and even if they try to adhere, they fall immediately below the notch. For this reason, it is less likely that the resin powder particles are stuck on the upper portion of the guide plate and gradually become larger. Further, since the cutout portion of the guide plate has rounded corners, unnatural contact with the end portion is eliminated when the shutter is moved.

In addition, the amount of adhesion does not increase while the resin powder is pressed between the shutter end and the stopper and remains attached to either. In addition, the resin particles are not attached to the end face of the opening below the hopper, and the amount thereof does not increase.

  For these reasons, an accurate amount of raw material resin is always supplied to the lower mold or the like. Further, any foreign matter that has further adhered to the raw material resin that has adhered does not fall downward and enter the product. In addition, the cleaning of the shutter portion when the raw material to be used is changed becomes easier, and even if there is a trouble in cleaning, the risk of inconvenience in the production of the following types of products is reduced.

  Hereinafter, the present invention will be described based on the best embodiment.

  FIG. 2 shows the structure of the main part of the shutter according to the present embodiment. (A) of this figure is a figure which shows the cross section of the center part along the moving direction of this shutter part, (B) is the figure which looked down from the part shown by the AA line of (A). These correspond to (A) and (B) of FIG. (C) is an enlarged view of a portion surrounded by a circle at the left end of (B). In FIG. 2, parts having the same functions and effects as those in FIG. For this reason, the description about each of these parts is omitted. Hereinafter, only the part related to the present invention will be described.

  20 is a guide plate, and 40 is a spacer flange. In this shutter device, first, the guide plates below the shutter are not so long as the left and right (upper and lower in the figure (A)), but a so-called intermittent in which some parts are cut out in the middle. It has a structure. Further, the flat surface of the notch has rounded corners.

  Next, the spacer flange is different from the spacer flange shown in FIG. 1, and as shown in FIGS. 2 (B) and 2 (C), a cross section of a portion cut along a vertical direction along the moving direction. Is a rectangle. And in the position of the shutter in a state where the lower end of the hopper is closed, the moving direction side end surface is not supported from below. Furthermore, it does not come into contact with the end surface 12 in the moving direction side of the shutter at this position. For this reason, strictly speaking, it does not serve as a stopper when the shutter moves to the left in the figure. That is, the stopper is separately provided at a place where the resin powder does not exist. However, illustration is omitted.

  Now, in this shutter device, since the guide plate has an intermittent shape, even if the resin powder adheres to the upper surface of the shutter plate, it is pushed out by the notch portion as the shutter moves and falls downward from there. . Further, as shown in (C), since there is a gap between the spacer flange 40 facing the moving direction side end face 12 where the hopper opening is closed on the left side of the shutter in the drawing, the resin powder is pressed at this portion. It is not fixed to any end wall surface. Further, since there is no structure below the opening side wall surface of the spacer flange, the resin powder particles do not accumulate. Similarly, as shown on the right side of (B), there is a gap 13 between the spacer flanges facing the moving direction side end surface where the opening of the hopper opens, and the lower side of the hopper opening. Has been. Of course, this part of the guide plate is also cut away. For this reason, the resin granular material adheres to this portion and is pressed to increase the amount of adhesion, and is fixed and does not fall in the meantime.

  In addition, since the notch part of a guide plate has roundness, it becomes difficult to produce a catch etc. at the time of movement of a shutter.

  As mentioned above, although this invention has been demonstrated based on the best embodiment, it cannot be overemphasized that this invention is not limited to these. That is, for example, the following cases and modifications may be used.

(1) The application of the resin supply device using a hopper is, for example, mixing powder, shuttering the powder discharge passage for discharging the powder from the storage blender, and powder from the hopper to the cylinder of the injection molding device. For granular molding material supply control or supply stop shutter.
(2) What is supplied is not resin particles, but other substances are added to this.
(3) The upper surface of the guide plate is not horizontal and is slightly inclined toward the opening side, and the shutter of the part has a shape and structure corresponding to this.

It is a figure which shows the structure of the part relevant to this invention of the shutter of a prior art, (A) shows the cross section of the up-down direction of the center part along a moving direction, (B) is AA of (A). It is the figure which looked at the downward direction from the line part. It is a figure which shows the structure of the principal part of the shutter of embodiment of this invention, (A) shows the cross section of the up-down direction of the center part along a moving direction, (B) is AA of (A). The figure which looked at the downward direction from the line part is shown, (C) is an enlarged view of the part enclosed with the circle of (A).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Shutter 11 Shutter position with lower end of hopper open 12 Shutter closing side end surface 13 Shutter opening direction side end 20 Guide plate (embodiment)
25 Guide plate (prior art)
30 Upper flange 31 Hopper wall (closing direction side)
32 Hopper wall (opening direction side)
40 Spacer flange (embodiment)
45 Spacer flange (prior art)
50 Lower flange 51 Lower discharge duct (closing direction side)
52 Lower discharge duct (open side)

Claims (4)

A shutter device that opens and closes a discharge port to the lower side of the granular material by reciprocating in the horizontal direction a shutter located below the opening formed at the lower end of the granular material storage unit,
The end surface on the moving direction to the closing of the shutter is positioned further on the moving direction side than the end on the moving direction side to the closing of the lower end of the powder storage unit when the discharge port is closed, and A shutter device characterized in that a space opened downward is formed on the moving direction side. A shutter device that opens and closes the outlet to the lower side of the granular material by reciprocating in the horizontal direction the shutter located below the opening formed at the lower end of the powder storage unit,
The shutter device is characterized in that a space that is open downward is formed on the moving direction side end surface of the shutter when the discharge port is open. A shutter device that opens and closes a discharge port to the lower side of the granular material by reciprocating in the horizontal direction a shutter located below the opening formed at the lower end of the granular material storage unit,
A pair of guide plates are provided on both sides of the shutter along the reciprocating direction of the shutter, supporting and guiding the shutter from below both sides, and having at least one notch on the opening side. A shutter device characterized by that. The guide plate is
4. The shutter device according to claim 3, wherein the horizontal surface at the end of the notch has a roundness.

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