JP3188868U - Molding equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a molding apparatus capable of molding a foam molded product without fusion failure even in the first molding when molding foam molded products one after another while opening and closing a pair of molding molds. SOLUTION: A heating time setting means 6 according to a molding apparatus 1 heats in the first molding of a foamed molded product when molding foam molded products one after another while opening and closing a pair of molding molds 2 and 3. The time is such that the temperature of the pair of molding dies 2 and 3 is raised to the temperature required for stable molding of the foamed molded product by heating the heating means with respect to the heating time in the molding of the foam molded product after the predetermined first time except the first time. It will be set for a long time. [Selection diagram] Fig. 1

Description

  The present invention relates to a molding apparatus for foam-molding a foam-molded body.

  Conventionally, as this type of molding apparatus, there is a pair of molding dies including a stationary mold having a female mold and a movable mold having a male mold that is configured to be movable toward and away from the stationary mold. (For example, see FIG. 2 of Patent Document 1). The pair of molding dies are configured to be openable and closable so as to fill the foamed resin particles and mold the foamed molded body, and the molding device is a foamed resin filled in the pair of molding dies closed during the molding. In order to heat the particles, a heating means for heating the pair of molds and a heating time setting means for setting a heating time by the heating means are provided. Of the pair of molds, the fixed mold is provided with a rod-like eject pin for pushing the foamed molded product and releasing it from the female mold.

  In such a molding apparatus, the foaming resin particles are filled into the molding space formed by bringing the movable mold close to the fixed mold and closing the female mold and the male mold, and then set by the heating time setting means. During the heating time, the foamed product can be formed by heating with steam by a heating means and then cooling. In addition, after molding the foam molded body, the movable mold can be moved away from the fixed mold to open the pair of molds, and the foam molded body can be pushed out by an eject pin and released from the female mold. .

  According to such a molding apparatus, the foamed molded product is molded one after another while opening and closing the pair of molding dies to produce a plurality of foamed molded products. Here, in the heating at the time of molding, the heating time is set constant by the heating time setting means. Specifically, in the molding of each foamed molded product from the first time to the last time, the heating time by the heating time setting means is when the pair of molds are heated and are in a steady state at a predetermined stable molding temperature (hereinafter referred to as the heating time). , At the time of stable molding), it is set to a certain time required for stable molding of the foamed molded article. Therefore, especially in the first molding of the foam molded body, the pair of molding dies before molding is not in the steady state and the pair of molding dies are heated to some extent by heating by the heating means. The foamed resin particles may be fused at a temperature lower than the stable molding temperature without reaching the stable molding temperature. In such a case, there has been a problem that the foamed resin particles cannot be fused properly, and the foamed molded product becomes a defective product including a molded part with poor fusion.

JP-A-63-233822

  The present invention has been made in view of the above problems. When a foamed molded product is molded one after another while opening and closing a pair of molds, the foamed molded product has no fusing defect even in the first molding. It is an object of the present invention to provide a molding apparatus capable of molding the material.

  A molding apparatus according to the present invention includes a pair of molds that can be opened and closed for filling foam resin particles to mold a foam molded body, and foam resin particles filled in a pair of molds closed during the molding. A heating means for heating a pair of molds to be heated, and a heating time setting means for setting a heating time by the heating means, the heating time setting means being a foam molded article while opening and closing the pair of molds When the molding is performed one after the other, the heating time in the molding of the first foamed molding is a pair of moldings by heating the heating means with respect to the heating time in the molding of the foaming molding after a predetermined number of times except the first. The mold is set to be long so that the temperature is raised to a temperature required for stable molding of the foam molded article.

  Further, in the molding apparatus according to the present invention, it is possible to adopt a configuration in which the heating time in the molding of the foam molded body after the third time is set to a certain heating time necessary for the stable molding of the foam molded body. .

  According to the molding apparatus of the present invention, the heating time setting means, when the foam molded body is molded one after another while opening and closing the pair of molds, the heating time in the first molding of the foam molded body is 1 Since the heating time in the molding of the foam molded body after a predetermined time excluding the first round is set so as to raise the temperature of the pair of molds to the temperature necessary for stable molding of the foam molded body by heating of the heating means. Even in the first molding, there is an effect that the foamed resin particles can be appropriately fused, and a foamed molded article having no poor fusion can be molded.

It is a schematic sectional drawing of the shaping | molding apparatus which concerns on this embodiment.

  Hereinafter, an embodiment of a molding apparatus according to the present invention will be described with reference to FIG. As shown in FIG. 1, the molding apparatus 1 has a pair of molds 2 and 3 that can be opened and closed for filling foamed resin particles to mold a foamed molded body. Specifically, the molding device 1 includes a fixed mold 2 (hereinafter referred to as a fixed mold 2) and a movable mold 3 (hereinafter referred to as a movable mold 3) that is movably installed. It is configured. In this molding apparatus 1, the fixed mold 2 has a first mold 2 </ b> A, the movable mold 3 has a second mold 3 </ b> A, and the movable mold 3 is brought close to the fixed mold 2, so that the first mold The molding space is formed by bringing 2A and the second mold 3A into close proximity or contact with each other (closed) to form a foam molded article.

  In the present embodiment, the fixed mold 2 includes a first mold 2A formed in a convex shape or a concave shape along the opening and closing direction, and a first mold on the back side of the first mold 2A (the side where no molding space is formed). And a back plate 4a for supporting the mold 2A. A space formed by the first mold 2 </ b> A and the back plate 4 a is a steam chamber 4. The first mold 2A of the present embodiment is formed in a concave shape as shown in FIG. The first mold 2 </ b> A includes a plate-like bottom wall portion 21 that is substantially rectangular when viewed from the front, and a side wall portion 22 that stands up continuously from the peripheral edge of the bottom wall portion 21. The inner surfaces of the bottom wall portion 21 and the side wall portion 22 on the molding space side form a molding surface 21U that forms a molding space. The bottom wall portion 21 has a bottom surface (one surface) 21u in the molding surface (inner surface) 21U.

  The fixed mold 2 is equipped with a filling device (not shown) for filling the molding space with foamed resin particles. Further, the fixed mold 2 is provided with a mold release means 25 for extruding a foam molded body molded in the molding space and releasing it from the first mold 2A. The release means 25 has a release pin portion of a rod-like body (columnar body), and the release pin portion is inserted from the outside of the fixed die 2 into the first mold 2A through the vapor chamber 4. (See FIG. 1). Moreover, the mold release means 25 is provided so that the front end side can be moved in and out in the opening and closing direction with respect to the bottom surface 21 u of the bottom wall portion 21. The tip of the release pin portion of the release means 25 is flush with the bottom surface 21u when the foamed molded product is being molded. In addition, the mold release means 25 may be a means for releasing the foamed molded article by air pressure.

  In addition, the movable mold 3 of the present embodiment includes a second mold 3A that is formed in a convex shape or a concave shape along the opening and closing direction and is paired with the first mold 2A, and a back side (molding) of the second mold 3A. And a back plate 4a that supports the second mold 3A on the side where no space is formed (see FIG. 1). A space formed by the second mold 3 </ b> A and the back plate 4 a is a steam chamber 4. The second mold 3A of the present embodiment is formed in a convex shape on the molding space side, and has a convex portion 3a.

  Here, as shown in FIG. 1, the molding apparatus 1 heats the pair of molds 2 and 3 to heat the foamed resin particles filled in the pair of molds 2 and 3 closed at the time of molding. Means 5 and heating time setting means 6 for setting the heating time by the heating means 5 are provided.

  The heating means 5 of the present embodiment includes a steam generation means 51 that generates steam, and a steam supply means 52 that sends the generated steam to the fixed-type 2 steam chamber 4 and the movable-type 3 steam chamber 4. . The steam generation means 51 of the present embodiment is configured to be controlled by operating the steam pressure so as to generate steam by adjusting the steam pressure. The steam supply means 52 of this embodiment is a pipe, for example. Further, as shown in FIG. 1, steam from the heating means 5 is formed on the inner surface 21 </ b> U on the molding space side of the first mold 2 </ b> A and the inner surface on the molding space side of the second mold 3 </ b> A through the steam chamber 4. A vent 23 for supplying the space is provided.

  Moreover, the heating time setting means 6 of this embodiment is a heating process program having an operation control unit that can set the heating time of the heating means 5 and a display unit that displays the set heating time. The heating time setting means 6 is configured by a heating process program in which the heating time in each molding is set when the foamed molded body is molded one after another while opening and closing the pair of molds. The heating time in the molding of the foamed molded product for the first time is necessary for the stable molding of the foamed molded product by heating the heating means with respect to the heating time in the molding of the foamed molded product after the predetermined time except the first time. It is set long so as to raise the temperature. In the heating time setting means 6 of the present embodiment, for example, the heating time in the first and second foam moldings is 9.5 seconds, and the heating time in the third and subsequent foam moldings is 7.5 seconds. It is set to. Here, it is assumed that the heating time set in the third and subsequent moldings is such that the pair of molds 2 and 3 are sufficiently heated to reach a steady state (that is, a stable molding state) at a predetermined stable molding temperature. Thus, it is a certain time required for stable molding of the foamed molded product when the pair of molds 2 and 3 are in the stable molding state. On the other hand, the heating time set in the first molding and the second molding assumes that the pair of molds 2 and 3 are not in a stable molding state, and the pair of molding molds 2 and 3 are in a stable molding state. By including the heating time up to, the heating time is set longer than the constant heating time set in the third and subsequent moldings.

  The predetermined stable molding temperature of the present embodiment is such that the molding surface of the pair of molding dies 2 and 3 when the molded foam molding is taken out from the pair of molding dies 2 and 3 (the molding surface 21U of the first mold 2A). Alternatively, it can be determined based on the temperature of the molding surface of the second mold 3A) or the temperature of the molding surfaces of the pair of molding dies 2 and 3 before each molding. The stable molding of the foamed molded article means that the foamed resin particles are appropriately fused by heating, and the foamed molded article is molded without defective fusion.

  The operation of the molding apparatus 1 having the above-described configuration will be described in the case where foamed molded articles are molded one after another while opening and closing the pair of molds 2 and 3.

  The heating time setting means 6 sets the heating time in the molding of the first and second foamed molded articles to 9.5 seconds, and the heating time in the molding of the third and subsequent foamed molded articles to 7.5 seconds.

  Next, before forming the first foamed molded body, the pair of molds 2 and 3 are preheated. This preheating not only raises the temperature of the pair of molds 2, 3 so that the pair of molds 2, 3 approaches a stable molding state, but also the piping of the molding apparatus 1 and the pair of molds 2, 2. There is a significance of draining (water draining) within 3.

  After preheating, the first foamed molded article is molded. Specifically, the first mold 2A and the second mold 3A form a molding space by bringing the movable mold 3 close to the fixed mold 2 and closing the pair of molding molds 2 and 3. Then, the formation space is filled with foamed resin particles. Subsequently, during the heating time set for the first molding by the heating time setting means 6 (in this embodiment, 9.5 seconds), the steam from the heating means 5 passes through the vent 23 from the steam chamber 4, The foamed resin particles are heated by being supplied to the molding space, and then cooled after being foamed. Thereafter, when the movable mold 3 is separated from the fixed mold 2 and the pair of molds 2 and 3 are opened, the distal end side of the mold release means 25 pushes the foamed molded body to release the mold from the fixed mold 2. .

  After forming the first foamed molded article in this manner, the second foamed molded article is then molded. The molding of the second foamed molded product is the same as the molding of the first foamed molded product. After forming the second foamed molded product, the third foamed molded product is subsequently molded. In each molding after the third, the heating time is different from the first and second molding. That is, in each molding after the third time, the steam from the heating means 5 for the heating time (7.5 seconds in this embodiment) set for each molding after the third time by the heating time setting means 6. Is supplied from the vapor chamber 4 through the vent 23 to the molding space, whereby the foamed resin particles are heated.

  The foamed molded body molded in this manner is used, for example, as a building material (for example, a lightweight embankment material), an agricultural material (for example, a vegetable box), or a marine material (for example, a fish box). In addition, a foaming molding is not limited to the said use, It can be used for various uses. In addition, the foamed molded product can be configured in various shapes depending on the application. In other words, the first mold 2A of the one mold 2 and the second mold 3A of the other mold 3 can be configured in various shapes depending on the use of the foam molded body.

  As described above, the molding apparatus 1 according to the present embodiment includes a pair of molds 2 and 3 that can be opened and closed for filling a foamed resin particle to mold a foam molded body, and a pair of molds 2 that are closed during the molding. A heating means 5 for heating the pair of molds 2 and 3 and a heating time setting means 6 for setting a heating time by the heating means 5 in order to heat the foamed resin particles filled in When the time setting means 6 forms the foamed molded product one after another while opening and closing the pair of molds 2 and 3, the heating time in the molding of the first foamed molded product is a predetermined time after the first time The heating time in the molding of the foam molded body is set to be long so that the heating means 5 heats the pair of molds 2 and 3 to a temperature required for stable molding of the foam molded body. And

  According to the molding apparatus 1, when the heating time setting means 6 molds the foamed molded body one after another while opening and closing the pair of molds 2 and 3, the heating time in the first molding of the foamed molded body. However, with respect to the heating time in the molding of the foam molded body after the first time excluding the first time, the temperature of the pair of molds 2 and 3 is increased to the temperature necessary for the stable molding of the foam molded body by the heating means. Since the length is set to be long, the foamed resin particles can be appropriately fused even in the first molding, and a foamed molded product having no poor fusion can be molded.

  Further, the molding apparatus 1 according to the present embodiment is configured such that the heating time in the molding of the foam molded body for the third time and thereafter is set to a certain heating time necessary for stable molding of the foam molded body.

  According to the molding apparatus 1, since the heating time in the molding of the foam molded body after the third time is set to a constant heating time necessary for the stable molding of the foam molded body, it is appropriate in the molding after the third time. The foamed resin particles can be appropriately fused under a proper heating time, and a foamed molded product having no poor fusion can be efficiently molded.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

  For example, in the above-described embodiment, the heating time setting unit 6 has been described for the case where the heating time for the first and second moldings is set longer than the heating time for the third and subsequent moldings. The heating time setting means 6 can be set such that, for example, the heating time for the first molding is set longer than the heating time for the second and subsequent moldings, and the heating time for the second and subsequent moldings is set to be constant. It is.

  Alternatively, the heating time setting means 6 is set such that the heating time of the molding from the first to the third or more predetermined times (for example, the third time or the fourth time) is longer than the heating time of the molding after the predetermined time, It is also possible that the heating time for the molding after the predetermined time is set constant.

  Moreover, in the said embodiment, the heating time setting means 6 is the heating time set by the 1st time and the 2nd time shaping | molding. It is also possible to provide a calculation unit that calculates the heating time until the pair of molds 2 and 3 reach a stable molding state using the temperature and the vapor pressure of the heating means 5.

  Furthermore, the heating time setting means 6 calculates not only the heating time set by the first molding and the second molding but also the heating time after calculating by the calculation unit for the heating time set by each molding. It can also be configured to set. In this case, the heating time setting means 6 is configured so that, in each molding including the first time before the pair of molds 2 and 3 reach the stable molding state, the heating time is determined based on the calculation unit. In the stable molding state, it is adjusted and set so as to be longer than a certain heating time required for stable molding of the foamed molded body. In each molding after the pair of molding dies 2 and 3 reach the stable molding state, It is possible to configure the heating time to be set to a certain time necessary for stable molding of the foamed molded product in the stable molding state of the pair of molds 2 and 3.

  DESCRIPTION OF SYMBOLS 1 ... Molding apparatus, 2 ... One mold (fixed mold), 2A ... First mold of fixed mold, 3 ... The other mold (movable mold), 3A ... Second mold of movable mold, 4 ... Steam Chamber, 4a ... Back plate, 5 ... Heating means, 51 ... Steam generating means, 52 ... Steam supply means, 6 ... Heating time setting means, 21 ... Bottom wall portion, 21u ... Bottom surface (one surface) of bottom wall portion, 25 ... Mold release means

Claims (2)

A pair of molds that can be opened and closed for filling the foamed resin particles to form a foamed molded article, and a pair of molds for heating the foamed resin particles filled in the pair of molds closed during the molding. Heating means, and heating time setting means for setting the heating time by the heating means,
The heating time setting means, when the foamed molded body is molded one after another while opening and closing the pair of molds, the heating time in the molding of the first foamed molded body is foamed for a predetermined number of times after the first time A molding apparatus characterized in that the pair of molding dies are heated to a temperature necessary for stable molding of a foam molded body by heating of a heating unit with respect to a heating time in molding of the molded body.   The molding apparatus according to claim 1, wherein the heating time in molding the foamed molded product after at least the third time is set to a constant heating time necessary for stable molding of the foamed molded product.

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