JP5950754B2 - Molded product manufacturing equipment for manufacturing molded products covered with cover film - Google Patents

Description

  The present invention relates to a molded product manufacturing apparatus for manufacturing a molded product in which a molded product main body is covered or packaged with a cover film.

  Molded product (for example, hot melt) in which a main body made of a heat-meltable or thermoplastic material, which is formed in a predetermined shape (for example, a belt or a plate) and is solid at room temperature, is covered or packaged with a cover film. Etc.) have been proposed (see, for example, Patent Documents 1 and 2). And this type of molded product is usually used after being supplied to the consumer in a solid state and then remelted under the demand of the consumer.

  This type of molded product is generally produced by supplying a molten molding material on a cover film and cooling and solidifying the molding material. Here, as the cover film, for example, in order to prevent melting or breakage when coming into contact with the molding material in the molten state, for example, a plastic film whose melting point is higher than the temperature of the molding material in the molten state, Alternatively, release paper or the like is used. In this case, since a special apparatus or means for covering or packaging the main body portion with the cover film is not required, there is an advantage that the structure of the molded product manufacturing apparatus is simplified.

JP 2002-362661 A JP 2004-99154 A

  By the way, when this type of molded product is remelted and used by the customer, usually the cover film is peeled off from the main body portion before being remelted. There is a problem that the removal work is complicated. Therefore, it is conceivable to remelt the molded product without removing the cover film. However, in this case, the cover film mixed in a solid state in the molten molded product must be removed. At that time, fine fragments of the cover film may remain as foreign matter in the molded product. In either case, since the removed cover film is a waste, there is a problem that it must be discarded or treated.

  The present invention has been made in order to solve the above-described conventional problems, and a molded product in which a main body portion made of a heat-meltable or thermoplastic material is covered or packaged with a cover film is used as a solid main body portion. It is an object to be solved to provide a means that makes it possible to remelt and use the cover film without removing the cover film and to prevent generation of waste.

  An apparatus for manufacturing a molded product according to the present invention, which has been made to solve the above-mentioned problems, is a molded product main body formed of a heat-meltable or thermoplastic molding material, and a thermal melting having a lower melting point than the molded product main body. A molded product having a cover film that is formed of a plastic or thermoplastic molding material and covers or packages the molded product main body partly or entirely. Here, when the cover film is in a molten state, the cover film has compatibility with the molded product main body portion in the molten state.

  This molded product manufacturing apparatus includes a belt-type molding apparatus, a lower cover film supply mechanism, and a lower belt cooling mechanism. The belt-type forming apparatus has a main belt mechanism that includes a plurality of rollers and a metal ring-shaped main belt wound around the rollers, and the main belt travels along a predetermined circulation path. The molding material having fluidity supplied onto the main belt running on the upper part of the sheet is solidified or cured while being transferred by the main belt to produce a strip-shaped or flat plate-shaped molded product. The lower cover film supply mechanism continuously supplies and adheres the lower cover film to the outer peripheral surface of the main belt before the main belt contacts the molding material. The lower belt cooling mechanism cools the main belt so as not to melt when the lower cover film is in contact with the molding material.

  In one embodiment of the present invention, the belt-type molding apparatus is disposed opposite to the upper side of the main belt mechanism on the downstream side of the molding material supply mechanism with respect to the molding material transfer direction, and is wound around a plurality of rollers and the rollers. A sub-belt mechanism having a metal ring-shaped sub-belt that travels along the circumference path. Here, the molding material is transferred to the downstream side while being sandwiched between the main belt and the sub belt facing each other. Then, the molded product manufacturing apparatus includes an upper cover film supply mechanism that continuously supplies and closely adheres the upper cover film to the outer peripheral surface of the sub belt before the sub belt contacts the molding material, and the upper belt cover film and the upper cover film as the molding material. An upper belt cooling mechanism for cooling so as not to melt when abutting.

  In this case, it is preferable that the lower belt cooling mechanism has at least one of a cooler that cools the (frontmost) roller of the main belt mechanism and a cooling medium nozzle that blows the cooling medium on the inner peripheral surface of the main belt. The upper belt cooling mechanism preferably includes at least one of a cooler that cools the (frontmost) roller of the sub belt mechanism and a cooling medium nozzle that blows the cooling medium on the inner peripheral surface of the sub belt.

  In the molded product manufactured by the molded product manufacturing apparatus according to the present invention, examples of the molding material forming the molded product main body include pitch, hot melt, phenol resin, epoxy resin, wax, surfactant, oil and fat, and inorganic Examples thereof include salts (for example, sodium chloride, magnesium chloride, etc.). Moreover, as a material which forms a cover film, polyolefin (for example, polyethylene, a polypropylene, etc.), nylon, PET, or PVC is mentioned, for example.

  When the molded product manufactured by the molded product manufacturing apparatus according to the present invention is remelted, the cover film having a melting point lower than that of the molded product main body is surely melted and then dissolved in the molded product main body in the molten state. However, it does not remain in the solid state and does not become a foreign substance. For this reason, the molded product can be melted and used as it is without removing the cover film from the solid molded product main body. Also, since the cover film becomes a part of the molded product, no waste is generated.

  Further, according to the molded product manufacturing apparatus according to the present invention, when the molten molding material or the high-temperature molding material is brought into contact with the cover film, the molding material in the vicinity of the cover film is almost instantaneously caused by the metal ring-shaped belt. It is cooled and becomes lower than the melting point of the cover film. For this reason, the cover film does not melt or break due to contact with the molding material. Therefore, melting or breakage of the cover film having a melting point lower than that of the molding material can be surely prevented, and a molded product can be produced without hindrance.

It is a typical side view of the molded article manufacturing apparatus which concerns on Embodiment 1 of this invention. It is a top view around the material supply mechanism of the molded article manufacturing apparatus shown in FIG. It is a side view around the material supply mechanism of the molded article manufacturing apparatus shown in FIG. It is a typical perspective view around the material supply part of the molded article manufacturing apparatus shown in FIG. (A)-(d) is sectional drawing of the cover film or molding material in the middle of manufacture of a molded product, (e) is sectional drawing of the completed molded product. It is a typical side view of the molded article manufacturing apparatus which concerns on Embodiment 2 of this invention.

(Embodiment 1)
FIG. 1 shows a band-shaped or flat plate-shaped (plate-shaped) molded product having a predetermined shape, in which a molded product main body is entirely covered or packaged with a cover film according to Embodiment 1 of the present invention. 1 schematically shows a molded product manufacturing apparatus. As will be described in detail later, this molded product manufacturing apparatus P1 is a thermal press using a belt press type belt-type molding apparatus T1 having two endless belt mechanisms (hereinafter referred to as "belt mechanisms") arranged one above the other. A molding material made of a meltable or thermoplastic material is pressed up and down to form a strip or a plate, and the molding material is covered or packaged with a cover film made of a heat-meltable or thermoplastic material to form a molded product. It is a device to manufacture.

  Here, the “heat-meltable or thermoplastic material” is a material that is solid at room temperature but softens or melts and becomes flowable as the temperature rises, and the viscosity increases as the temperature increases. It has the property to become low. That is, in such a material or molding material, the viscosity can be adjusted by changing the temperature in a molten state or a softened state. Such materials or molding materials include, for example, substances having a relatively high viscosity in the molten state such as pitch, hot melt, rubber, or wax, surfactants, fats and oils, inorganic salts (sodium chloride, magnesium chloride, etc.) And a substance having a relatively low viscosity in the molten state. Needless to say, the heat-melting or thermoplastic material or the molding material that is the subject of the present invention is not limited to the above specific examples.

  On the other hand, the “cover film” is a heat-meltable or thermoplastic thin film material that covers or packages the molding material or the molded product body. As the cover film, a film formed of a substance having a melting point lower than that of the molded product main body covered by the cover film is used. Furthermore, the material of the cover film is selected from a molded product main body covered by the cover film and a substance having compatibility when both are in a molten state. That is, the material of the cover film is preferably selected according to the melting point of the molded product main body and the compatibility of both in the molten state. As such a cover film, for example, a film of polyolefin such as polyethylene or polypropylene, or a film of nylon, polyethylene terephthalate (PET), polyvinyl chloride (PVC), or the like can be used. Of course, the material of the cover film that is the subject of the present invention is not limited to the above specific examples.

  Thus, since the molded product is covered or packaged with a cover film having a melting point lower than that of the molded product main body and compatible with the molded product main body in the molten state, when the molded product main body is melted, The film is reliably melted and dissolved in the liquid molded product main body, and does not remain as a solid foreign substance in the molded product. The material of the cover film is preferably set so that even if the cover film is dissolved in the molded product main body, the quality of the molded product is not substantially deteriorated and the purpose of use of the molded product is not substantially impaired. Of course, it is selected.

  Here, the “melting point” is a temperature at which a heat-meltable or thermoplastic material can flow or flow freely, and is used for a representative substance or cover film that can be used as a molding material in the present invention. Typical melting points of typical materials that can be used are as follows. However, in the following substances, the melting point of a mixture material such as pitch or a polymer material such as polyethylene varies greatly depending on the composition or bonding mode and is not a constant value. Therefore, for these, the upper and lower limits of the melting point of those commonly used are described. Accordingly, there are of course some melting points that do not fall within the following range.

(Molding material)
Pitch: 100-200 ° C Hot melt: 100-150 ° C
Sodium chloride: 800 ° C Magnesium chloride: 714 ° C

(Cover film)
Polyethylene: 110-140 ° C Polypropylene: 160-190 ° C
Nylon: 210-270 ° C PET: 260-270 ° C
PVC: 80-220 ° C

  When this molded product is remelted, the cover film having a melting point lower than that of the molded product main body is surely melted, and then melted in the molded product main body in a molten state. Must not. For this reason, the molded product can be melted and used as it is without removing the cover film from the solid molded product main body. Also, since the cover film becomes a part of the molded product, no waste is generated.

  Hereinafter, a specific configuration and function of the molded product manufacturing apparatus P1 will be described. As shown in FIG. 1, the molded product manufacturing apparatus P1 includes a frame structure R, a belt-type molding apparatus T1, a material supply mechanism F, and a product take-out mechanism D that form a skeleton thereof. The belt-type molding apparatus T1 includes a lower belt mechanism B1 (corresponding to a “main belt mechanism” in the claims) having a lower drive roller 1 and a lower driven roller 2, an upper drive roller 3, and And an upper belt mechanism B2 having an upper driven roller 4 (corresponding to “sub-belt mechanism” in the claims). Here, the lower belt mechanism B1, the upper belt mechanism B2, the material supply mechanism W, and the product take-out mechanism D are all firmly supported by the frame structure R.

  The lower belt mechanism B1 is disposed in the lower half of the frame structure R. In the lower belt mechanism B1, a ring-shaped or endless lower steel belt 5 is wound around the lower drive roller 1 and the lower driven roller 2. When the molded product manufacturing apparatus P1 or the belt-type molding apparatus T1 is in operation, the lower drive roller 1 is rotated clockwise by the motor 6 (electric motor) via the first drive belt 7 in the positional relationship in FIG. Are rotated at a predetermined rotational speed. Accordingly, the lower steel belt 5 travels in a clockwise direction in a positional relationship in FIG. 1 along a circulation path determined by the lower drive roller 1 and the lower driven roller 2.

  Further, the lower belt mechanism B1 includes a lower pressing mechanism (not shown) that presses or urges the lower steel belt 5 running linearly in the horizontal direction along the upper portion of the circuit path. Is provided. The lower pressing mechanism applies a pressing force to the inner peripheral surface or the back surface of the lower steel belt 5 by, for example, an urging force or hydraulic pressure of a spring, thereby appropriately pressing or urging the lower steel belt 5 upward. . Further, the lower belt mechanism B1 has a low-temperature heat transfer medium (for example, 0 to 10 ° C.) on the inner peripheral surface or the back surface of the lower steel belt 5 running linearly on the upper portion of the circulation path. The lower heat transfer medium supply mechanism 8 that cools the lower steel belt 5 is provided. The lower driven roller 2 is formed in a drum shape, and a lower drum cooler 9 for cooling the drum of the lower driven roller 2 is disposed therein. Note that the lower drum cooler 9 cools the lower driven roller 2 by injecting low-temperature (for example, 0 to 10 ° C.) cooling water onto the drum inner peripheral surface, for example.

  The upper belt mechanism B2 is disposed in the upper half portion of the frame structure R so as to face the lower belt mechanism B1 above the lower belt mechanism B1. In the upper belt mechanism B <b> 2, a ring-shaped or endless upper steel belt 10 is wound around the upper drive roller 3 and the upper driven roller 4. When the molded product manufacturing apparatus P1 or the belt-type molding T1 is in operation, the upper drive roller 3 is moved downward by the motor 6 via the second drive belt 11 in the counterclockwise direction in the positional relationship in FIG. It is rotationally driven at the same peripheral speed as that of the drive roller 1. Accordingly, the upper steel belt 10 has the same speed as that of the lower steel belt 5 in the counterclockwise direction in the positional relationship in FIG. 1 along the rotation path determined by the upper drive roller 3 and the upper driven roller 4. Run around.

  Further, the upper belt mechanism B2 is provided with an upper pressing mechanism (not shown) that presses or urges the upper steel belt 10 that travels linearly in the horizontal direction in the lower portion of the circuit path. It has been. The upper pressing mechanism applies a pressing force to the inner peripheral surface or the back surface of the upper steel belt 10 by, for example, an urging force or hydraulic pressure of a spring, thereby appropriately pressing or urging the upper steel belt 10 downward. Further, the upper belt mechanism B2 has a low-temperature heat transfer medium (for example, 0 to 10 ° C.) on the inner peripheral surface or the back surface of the upper steel belt 10 running linearly along the lower portion of the circulation path. An upper heat transfer medium supply mechanism 12 that cools the upper steel belt 10 is provided. The upper driven roller 4 is formed in a drum shape, and an upper drum cooler 13 for cooling the drum of the upper driven roller 4 is disposed therein. The upper drum cooler 13 cools the upper driven roller 4 by injecting low-temperature (for example, 0 to 10 ° C.) cooling water onto the inner peripheral surface of the drum, for example.

  The lower belt mechanism B1 and the upper belt mechanism B2 are configured such that the lower steel belt 5 that travels linearly in the upper part of the circulation path and the lower part of the circulation path linearly travels. The upper steel belt 10 is preferably disposed so as to maintain a gap or gap corresponding to the thickness of the molded product to be manufactured. The distance or gap between the lower steel belt 5 and the upper steel belt 10 can be arbitrarily changed within a predetermined range (for example, 5 to 50 mm) according to the thickness of the molded product to be manufactured. .

  Thus, when the molded product manufacturing apparatus P1 or the belt-type molding apparatus T1 is in operation, a part where the belt mechanisms B1 and B2 face each other in the vertical direction, that is, a molding material (in-process) in the process of manufacturing a molded product to be described later. In the region where the lower steel belt 5 and the upper steel belt 10 are cooled, the lower steel belt 5 and the upper steel belt 10 are kept in a straight line at the same speed in the same direction while maintaining a predetermined interval or gap therebetween. Travel horizontally. In the following, for convenience, the side to which the molding material is supplied (the left side in FIG. 1 and the upstream side of the molding material transfer) with respect to the direction in which the molding material is transferred (left and right in the positional relationship in FIG. 1). It is called “front”, and the side from which the molding material or molded product is discharged (the right side in FIG. 1 and the downstream side of the molding material transfer) is called “rear”. Further, the left side and the right side of the molded product manufacturing apparatus P1 or the belt type molding apparatus T1 as viewed from the rear side are referred to as “left” and “right”, respectively. Therefore, for example, FIG.1 and FIG.3 has shown the left side surface of the molded article manufacturing apparatus P1.

  As is clear from FIG. 1, the upper drive roller 3 is disposed slightly in front of the lower drive roller 1. A product take-out mechanism D for transferring the molding material or molded product discharged from both belt mechanisms B1 and B2 to a predetermined post-processing device is disposed slightly behind the upper drive roller 3 and above the lower drive roller 1. ing. Further, the upper driven roller 4 is arranged on the lower belt mechanism B1 considerably behind the lower driven roller 2 in order to secure a space for arranging a material supply mechanism F described in detail later. Yes.

  A lower film roller 15 around which a lower cover film 14 is wound in a roll shape is disposed slightly forward of the lower driven roller 2. The lower film roller 15 is attached to the frame structure R. During the operation of the molded product manufacturing apparatus P1, the lower cover film 14 wound around the lower film roller 15 includes a lower driven roller 2 and a lower opposed roller 16 disposed to face the lower driven roller 2. And continuously pulled out from the lower film roller 15.

  Further, the lower cover film 14 is an opposing portion or a sandwiching portion between the lower driven roller 2 and the lower opposing roller 16, and the lower steel belt 5 and the lower side that are in contact with the outer peripheral surface of the lower driven roller 2. It is sandwiched between the outer peripheral surface of the opposing roller 16 and is brought into close contact with the outer peripheral surface of the lower steel belt 5. Thereafter, the lower cover film 14 is transferred rearward while being in close contact with the lower steel belt 5. That is, behind the lower driven roller 2, the lower cover film 14 and the lower steel belt 2 move rearward at the same speed while maintaining a state of being in close contact with each other. As described above, since the drum of the lower driven roller 2 is cooled by the lower drum cooler 9, the lower steel belt 5 is cooled at the portion in contact with the outer peripheral surface of the lower driven roller 2, It becomes a low temperature state. Accordingly, the lower cover film 14 that is in close contact with the lower steel belt 5 is also in a low temperature state.

  Further, in the front-rear direction, water is sprayed on the outer peripheral surface of the lower steel belt 5 in contact with the outer peripheral surface of the lower driven roller 2 in the space between the lower driven roller 2 and the lower film roller 15. A lower water spray nozzle 17 for spraying is disposed. During operation of the molded product manufacturing apparatus P1, the outer peripheral surface of the lower steel belt 5 in which the mist or spray water sprayed or injected from the lower water injection nozzle 17 is not yet in close contact with the lower cover film 14 Adhere to. Thus, with the water adhering to the lower steel belt 5, the lower cover film 14 and the outer peripheral surface of the lower steel belt 5 can be brought into close contact with each other without mixing air or bubbles between them. When air or air bubbles are mixed between the two, when the molding material is sandwiched between the lower steel belt 5 and the upper steel belt 10 and pressed in the vertical direction, the air or air bubbles are present. There is a possibility that a hole or a pinhole is generated in the lower cover film 14.

  An upper film roller 19 around which an upper cover film 18 is wound in a roll shape is disposed slightly above the upper driven roller 4. The upper film roller 19 is attached to the frame structure R. During the operation of the manufacturing apparatus P, the upper cover film 18 wound around the upper film roller 19 is continuously formed by the upper driven roller 4 and the upper opposing roller 20 disposed so as to face the upper driven roller 4. Pulled out from the roller 19.

  The upper cover film 18 is an opposing portion or sandwiching portion between the upper driven roller 4 and the upper opposing roller 20, and the outer peripheral surfaces of the upper steel belt 10 and the upper opposing roller 20 that are in contact with the outer peripheral surface of the upper driven roller 4. Between the upper steel belt 10 and the upper steel belt 10. Thereafter, the upper film 18 is transferred substantially downward along the outer peripheral surface of the upper driven roller 4 while being in close contact with the outer peripheral surface of the upper steel belt 10, and then transferred rearward together with the upper steel belt 10. That is, behind the upper driven roller 4, the upper cover film 18 and the upper steel belt 10 move rearward at the same speed while maintaining a close contact state. As described above, since the drum of the upper driven roller 4 is cooled by the upper drum cooler 13, the upper steel belt 10 is cooled at a portion in contact with the outer peripheral surface of the upper driven roller 4 to be in a low temperature state. . Accordingly, the upper cover film 18 that is in close contact with the upper steel belt 10 is also in a low temperature state.

  Further, in the vertical direction, in the space between the upper driven roller 4 and the upper film roller 19, the upper water that sprays or sprays water on the outer peripheral surface of the upper steel belt 10 that is in contact with the outer peripheral surface of the upper driven roller 4. An injection nozzle 21 is provided. During operation of the molded article manufacturing apparatus P1, mist or spray water sprayed or sprayed from the upper water spray nozzle 21 adheres to the outer peripheral surface of the upper steel belt 10 that is not yet in close contact with the upper cover film 18. . Thus, the water adhering to the upper steel belt 10 allows the upper cover film 18 and the outer peripheral surface of the upper steel belt 10 to be brought into close contact with each other without mixing air or bubbles between them. When air or air bubbles are mixed between the two, there is a possibility that a hole or a pinhole is formed in the upper cover film 18 for the same reason as in the case of the lower cover film 14.

  Between the lower driven roller 2 and the upper driven roller 4 with respect to the front-rear direction, the lower cover film on the lower steel belt 5 running above the lower belt mechanism B1 is located above the lower belt mechanism B1. On 14, a material supply mechanism F for supplying a material of the molded product is disposed. As will be described in detail later, the material supply mechanism F includes a left-side material feeder 22 and a right-side material that are disposed at a predetermined interval in the width direction of the lower steel belt 5 (hereinafter referred to as “belt width direction”). A feeder 23 and a rear material feeder 24 disposed behind the both material feeders 22 and 23 are provided. Both the left and right material feeders 22 and 23 and the rear material feeder 24 are supplied with the same molding material having fluidity from a material supply source 25 via material supply devices 26 and 27, respectively.

  As shown in FIGS. 2 and 3, the left material feeder 22 and the right material feeder 23 are cylindrical material supply means extending vertically, and the lower cover on the lower steel belt 5 from the nozzle at the lower end thereof. A molding material having fluidity with respect to the film 14 is discharged in the form of a strand or a column, for example, a square column or a column. The dimensions of the discharged strand-shaped or columnar molding material in the belt width direction or in the left-right direction, that is, the dimension in the left-right direction of the discharge port of the nozzle can appropriately form the weir portions 30, 31 described later. It is preferably set within a possible range (for example, 5 to 30 mm). The left-side material feeder 22 and the right-side material feeder 23 are arranged at a predetermined interval in the belt width direction, that is, the left-right direction. In addition, the said space | interval of the left side material feeder 22 and the right side material feeder 23 can be arbitrarily changed within a predetermined range (for example, 350-480 mm) according to the width dimension of the molded product which should be manufactured.

  On the other hand, the rear material feeder 24 is a material supply means extending in the belt width direction, that is, in the left-right direction, and is uniform and the entire surface with a predetermined width across the left and right with respect to the lower cover film 14 on the lower steel belt 5. In particular, a flowable molding material is supplied in sheet form (flow film form). The width (sheet width) at which the rear material feeder 24 supplies the molding material can be arbitrarily changed within a predetermined range (for example, 350 to 480 mm) according to the width dimension of the molded product to be manufactured. it can.

  As shown in FIG. 4, when the molded article manufacturing apparatus P1 is in operation, the lower steel belt 5 (see FIG. 5 (a)), on which the lower cover film 14 is in close contact, is lowered on the upper side of the circulation path. It moves rearward from the front end of the side belt mechanism B1. And the molding material which is in a molten state and has fluidity | liquidity is continuously discharged | emitted from the left side material feeder 22. FIG. This molding material is solid at room temperature, but softens or melts as the temperature rises, and becomes a heat-meltable or thermoplastic material (hereinafter referred to as “thermoplastic material”) whose viscosity decreases as the temperature increases. It is. That is, a molding material made of a thermoplastic material can be adjusted in viscosity by changing its temperature in a molten state or a softened state. The temperature of the molding material made of the thermoplastic material is such that the molding material hardly spreads in the left-right direction when it abuts on the lower cover film 14, and generally has a viscosity that can maintain the width during ejection. Preferably set to have.

  When the molding material made of a thermoplastic material comes into contact with the lower cover film 14, in the vicinity of the lower cover film, the molding material is cooled almost instantaneously by the lower steel belt 5 at the lower temperature below the molding material. The temperature is lower than the melting point of the side cover film 14. For this reason, the lower cover film 14 does not melt or break due to contact with the molding material. Then, except for the vicinity of the lower cover film, the molding material decreases in temperature and increases in viscosity as it moves rearward, and finally solidifies. The molding material that is continuously discharged and solidified in this way is the left side that extends linearly in the front-rear direction on the lower cover film 14 by the rearward movement of the lower steel belt 5 or the lower cover film 14. The dam portion 30 is formed.

  The width of the left weir 30 formed in this way is substantially the same as the left and right dimensions of the columnar molding material discharged from the left material feeder 22 or the left and right dimensions of the nozzle outlet of the left material feeder 22. . That is, the width of the left dam 30 can be freely adjusted by changing the left and right dimensions of the discharge port of the nozzle of the left material feeder 22. Further, the height of the left dam 30 is determined by the moving speed of the lower steel belt 5 and the supply speed of the molding material of the left material feeder 22. Therefore, the height of the left dam 30 can be freely adjusted by changing the material supply speed of the left material feeder 22 according to the moving speed of the lower steel belt 5. In the specific example shown in FIG. 4, the left dam portion 30 is a square columnar strand extending in the front-rear direction, but the shape of the left dam portion 30 is not limited to this, and is any shape. Also good. For example, the left dam portion 30 may be a semi-cylindrical shape or a triangular prism shape.

  Similarly to the case of the left-side material feeder 22, the right-side material feeder 23 also has the lower steel belt 5 on which the lower cover film 14 is in close contact with the upper side of the circulation path when the belt press apparatus P is in operation. When moving backward, the right dam portion 31 that extends linearly in the front-rear direction is formed on the lower cover film 14. Therefore, on the lower film 14 on the lower steel belt 5 moving rearward, as shown in FIG. 5B, the shapes (for example, width and height) are equal to each other and straight toward the rear. A pair of parallel weir portions 30 and 31 extending in a shape are formed. In this case as well, for the same reason as in the case of the left-side material feeder 22, the lower cover film 14 is not melted or broken due to contact with the molding material.

  Then, the rear material feeder 24 is placed on the lower cover film 14 between the left dam portion 30 and the right dam portion 31 formed on the lower film 14 behind the left and right material feeders 22 and 23. On the other hand, the molding material is continuously supplied downward in the form of a sheet (liquid film). Here, when the molding material comes into contact with the lower cover film 14, in the vicinity of the lower cover film, the molding material is cooled almost instantaneously by the lower temperature lower steel belt 5 below the lower cover film, and the lower cover film 14 The temperature is lower than the melting point of the film 14. For this reason, the lower cover film 14 does not melt or break due to contact with the molding material. Then, except in the vicinity of the lower cover film, the molding material is cooled by the lower steel belt 5 at a low temperature, and as it moves rearward, the temperature decreases, the viscosity increases, and finally solidifies. Then, the molding material continuously supplied and solidified in this way is moved downward between the left dam portion 30 and the right dam portion 31 by the rearward movement of the lower steel belt 5 or the lower cover film 14. On the side cover film 14, the material main body 32 extending in the front-rear direction in a band shape is formed.

  Here, the width (sheet width) of the sheet-shaped molding material supplied on the lower cover sheet 14 is equal to or slightly shorter than the interval between the left material feeder 22 and the right material feeder 23 ( For example, 1 to 3 mm) is set. Further, the thickness (sheet thickness) and the supply speed of the sheet-shaped molding material supplied onto the lower cover sheet 14 are the same as the heights of both the left and right dam portions 30 and 31. Set to match or slightly higher. Thus, as shown in FIG. 5 (c), in the rear of the rear material feeder 24, a molding having a substantially uniform height in which the material main body portion 32 is sandwiched between the left dam portion 30 and the right dam portion 31. Materials 30-32 are formed. In this state, since the molding materials 30 to 32 are not completely solidified, they have fluidity or plasticity. In addition, the upper surface of the material main body 32 must be flat or slightly convex upward, and it is not preferable to be concave.

  As shown in FIGS. 2 and 3 again, a left air blowing mechanism 28 is disposed on the left side of the lower steel belt 5 between the rear material feeder 24 and the upper driven roller 4 with respect to the front-rear direction, and left air on the right side. A spraying mechanism 29 is provided. The left air blowing mechanism 28 forms an air curtain by blowing air from a plurality or a large number of nozzles to the molding materials 30 to 32. Even if the material main body 32 has fluidity, the material main body 32 is This prevents the left dam 30 from flowing out to the left. Similarly, the right air blowing mechanism 29 prevents the material main body portion 32 from flowing out to the right beyond the right dam portion 30.

  As shown in FIG. 1 again, the molding material 30 to 32 in which the material main body 32 is sandwiched between the left dam 30 and the right dam 31 on the lower cover sheet 14 includes the lower belt mechanism B1. It is transferred to the gap between the upper belt mechanism B2. At that time, when the molding materials 30 to 32 pass through the upper driven roller 4 and the upper surface of the lower steel belt 5 or the opposed portions of the outer peripheral surface, the upper cover film is placed on the upper surfaces of the molding materials 30 to 32 by the upper driven roller 4. 18 is brought into contact.

  When the molding materials 30 to 32 come into contact with the upper cover film 18, the molding materials 30 to 32 are cooled almost instantaneously by the lower upper steel belt 10 in the vicinity of the upper cover film. For this reason, even if the vicinity of the upper surface of the molding materials 30 to 32 has a temperature higher than the melting point of the upper cover film 18, this portion becomes lower than the melting point of the upper cover film 18 almost instantaneously. For this reason, the upper cover film 18 does not melt or break due to contact with the molding materials 30 to 32. Then, behind the upper driven roller 4, the molding materials 30 to 32 whose lower surface is covered with the lower cover film 14 and whose upper surface is covered with the upper cover film 18 are interposed between the lower steel belt 5 and the upper steel belt 10. It is sandwiched and pressed up and down.

  The molding materials 30 to 32 are cooled by the lower steel belt 5 and the upper steel belt 10 when being pressed by the lower steel belt 5 and the upper steel belt 10 and transferred backward. As a result, as shown in FIG. 5 (d), the two weir portions 30, 31 and the material main body portion 32 constituting the molding materials 30 to 32 are completely solidified while being fused with each other, and are integrally molded. It becomes the product main body 33. Thereafter, the molded product main body 33 whose lower surface is covered with the lower cover film 14 and whose upper surface is covered with the upper cover film 18 is discharged rearward from both belt mechanisms B1, B2 or the belt-type molding apparatus T1.

  The molded product main body 33 discharged from both belt mechanisms B1 and B2 is transferred to the product take-out mechanism D. This product take-out mechanism D covers both side surfaces of the molded product main body portion 33 with excess lower cover film 14 and upper cover film 18 extending to the left and right of the molded product main body portion 33. Thus, as shown in FIG. 5E, a molded product 35 in which the molded product main body 33 is covered or packaged with the cover film 34 is completed. The molded product 35 is transferred to a predetermined post-processing facility (not shown). In the post-processing facility, for example, a long strip-shaped molded product 35 is cut into a predetermined length, and the cut portion is covered with a cover film.

  When the molded product 35 according to the first embodiment is remelted, the cover film 34 having a melting point lower than that of the molded product main body portion 33 is surely melted, and then melted in the molded product main body portion 33 in a molten state. In this state, it does not remain and does not become a foreign object. For this reason, the molded product 35 can be melted and used as it is without removing the cover film 34 from the solid molded product main body 33. Moreover, since the cover film 34 becomes a part of the molded product 35, no waste is generated.

  Moreover, according to the molded article manufacturing apparatus P1, when the molten thermoplastic material or the high-temperature molding material 30 to 32 is brought into contact with the cover films 14 and 18, the thermoplastic material or the molding material 30 in the vicinity of each cover film. .About.32 are cooled almost instantaneously by the steel belts 5 and 10 and become lower than the melting points of the cover films 14 and 18. For this reason, each cover film 14 and 18 is not melted or damaged by contact with the thermoplastic material or the molding materials 30 to 32. Therefore, melting or breakage of the cover films 14 and 18 having a melting point lower than that of the molding materials 30 to 32 can be reliably prevented, and the molded product 35 can be manufactured without hindrance.

(Embodiment 2)
Hereinafter, the molded product manufacturing apparatus P2 according to Embodiment 2 of the present invention will be described with reference to FIG. However, the molded product manufacturing apparatus P2 according to the second embodiment shown in FIG. 6 has many common points with the molded product manufacturing apparatus P1 according to the first embodiment shown in FIGS. Hereinafter, differences from the molded product manufacturing apparatus P1 according to the first embodiment will be mainly described. In the molded product manufacturing apparatus P2 shown in FIG. 6, the same reference numerals as those of the molded product manufacturing apparatus P1 are attached to the same components as those of the molded product manufacturing apparatus P1 shown in FIG. .

  As shown in FIG. 6, the molded product manufacturing apparatus P2 according to the second embodiment does not include an upper belt mechanism. That is, the belt mechanism of the belt-type molding apparatus T2 is not a double press type belt mechanism. Therefore, the molding material supplied from the left and right material feeders 22, 23 and the rear material feeder 25 to the lower steel belt 5 of the lower belt mechanism B1 is transferred while being cooled by the lower steel belt 5, The molded product 35 is obtained.

  In the molded product manufacturing apparatus P2 according to the second embodiment, the upper surface of the molded product 35 is not covered with the cover film because the belt-type molding apparatus T2 does not include the upper belt mechanism and the apparatus attached thereto. However, a cover film attachment mechanism including a film roller and a counter roller for attaching the cover film to the upper surface of the molding material transferred by the lower steel belt 5 may be provided above the lower belt mechanism B1. Good. About another point, it is the same as that of the case of the molded article manufacturing apparatus P1 which concerns on Embodiment 1. FIG.

  Also in the molded product manufacturing apparatus P2 according to the second embodiment, basically, as in the molded product manufacturing apparatus P1 according to the first embodiment, the cover film 14 having a melting point lower than that of the molding material 30 to 32 is melted or damaged. It can prevent reliably and can manufacture the molded product 35 without trouble.

  P1 Molded product manufacturing device of double press type according to Embodiment 1, P2 Molded product manufacturing device according to Embodiment 2, T1 belt type molding device (double press type), T2 belt type molding device, R frame structure, B1 bottom Side belt mechanism (lower endless belt mechanism), B2 Upper belt mechanism (upper endless belt mechanism), F material supply mechanism, D Product take-out mechanism, 1 Lower drive roller, 2 Lower driven roller, 3 Upper drive roller, 4 Upper driven roller, 5 lower steel belt (main belt), 6 motor, 7 first drive belt, 8 lower heat transfer medium supply mechanism, 9 lower cooler, 10 upper steel belt (sub belt), 11 second drive Belt, 12 Upper heat transfer medium supply mechanism, 13 Upper cooler, 14 Lower cover film, 15 Lower film roller, 16 Lower facing , 17 Lower water injection nozzle, 18 Upper cover film, 19 Upper film roller, 20 Upper counter roller, 21 Upper water injection nozzle, 22 Left material feeder, 23 Right material feeder, 24 Rear material feeder, 25 Material supply 26, front material supply device 27, rear material supply device, 28 left air blowing mechanism, 29 right air blowing mechanism, 30 left dam portion, 31 right dam portion, 32 material main body portion, 33 molded product main body portion, 34 cover film 35 Molded products.

Claims (4)

A molded product main body formed of a heat-meltable or thermoplastic molding material and a part of the molded product main body formed of a heat-meltable or thermoplastic molding material having a lower melting point than the molded product main body. Or a cover film that is entirely covered or packaged, and when the cover film is in a molten state, a molded product having compatibility with the molded product main body in the molten state is manufactured. An apparatus for manufacturing a molded product for
The molded product manufacturing apparatus comprises:
A main belt mechanism that has a plurality of rollers and a metal ring-shaped main belt wound around the rollers, and the main belt travels along a predetermined circulation path; A belt-type molding apparatus for producing a strip-shaped or flat-plate shaped product by solidifying the molding material having fluidity supplied on the traveling main belt while being transported by the main belt;
A molding material supply mechanism for supplying the molding material to the belt-type molding apparatus;
Before the main belt comes into contact with the molding material, a lower cover film supply mechanism for continuously supplying and closely contacting the lower cover film to the outer peripheral surface of the main belt;
A lower belt cooling mechanism for cooling the main belt so as not to melt when the lower cover film is in contact with the molding material ;
The belt-type molding apparatus is disposed opposite to the upper side of the main belt mechanism on the downstream side of the molding material supply mechanism with respect to the molding material transfer direction, and is wound around the rollers and travels along a predetermined circulation path. A sub-belt mechanism having a ring-shaped sub-belt made of, and configured to be transferred to the downstream side in a state where the molding material is sandwiched between the main belt and the sub-belt facing each other,
The molded product manufacturing apparatus further includes:
An upper cover film supply mechanism that continuously supplies and closely adheres the upper cover film to the outer peripheral surface of the sub belt before the sub belt abuts on the molding material;
The Sabuberuto, moldings manufacturing apparatus the upper cover film is characterized that you have a upper belt cooling mechanism for cooling so as not to melt when in contact with the molding material. The lower belt cooling mechanism has at least one of a cooler that cools the rollers of the main belt mechanism and a cooling medium nozzle that blows a cooling medium on the inner peripheral surface of the main belt,
The upper belt cooling mechanism, characterized in that it has at least one of the cooling medium nozzle for blowing a cooling medium to the inner peripheral surface of the cooler and the Sabuberuto cooling the rollers of the Sabuberuto mechanism, according to claim 1 Molding product manufacturing equipment. The molding material forming the molded product body portion, the pitch, hot melt, phenolic resins, epoxy resins, waxes, surfactants, characterized in that it is a fat or inorganic salts, according to claim 1 or 2 Molded product manufacturing equipment. The material for forming the cover film is polyolefin, nylon, PET, or PVC, and the molded article manufacturing apparatus according to any one of claims 1 to 3 .

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