JP6096556B2 - Particle feeder in foam molding - Google Patents

Description

  The present invention relates to a particle supply apparatus in foam molding in which resin foam particles are supplied and filled into a cavity of a mold using a blower.

  Conventionally, foaming is performed by filling resin foam particles into the mold cavity, foaming the resin foam particles using a heating medium, and fusing the foamed resin particles together. In an apparatus for obtaining a molded product, in order to fill the resin foam particles into the cavity of the molding die, for example, as described in Patent Document 1, a filling device having a filling port facing the cavity of the molding die is used. Compressed air is supplied by a compressor, and the resin foam particles are sucked into the filler by the ejector action of the compressed air ejected from the filling port, and are filled in the cavity together with the compressed air.

  However, a compressor that supplies compressed air cannot supply compressed air immediately even if it is started when compressed air is required, and it is necessary to maintain a high pressure in the compressor in advance. Therefore, it is necessary to always operate the compressor when manufacturing the foam molded product. In addition, since a single large compressor often serves resin foam particles to a large number of molds, if even one mold is in operation, it is necessary to start up the compressor, resulting in high power consumption and high operating costs. There is a problem that becomes.

  In addition, since a piston rod for opening and closing a filling port for filling resin foam particles in the mold cavity is disposed in the filling device, compressed air is supplied into the filling device. It is necessary to bend the supply path in the middle, and the presence of this bent portion causes a loss of compressed air pressure. Therefore, it is necessary to use a compressor capable of supplying high-pressure compressed air, and low air pressure. A blower that can supply only compressed air cannot be used.

  For this reason, for example, as described in Patent Document 2, the maximum air volume can be output immediately after starting instead of the compressor, and the cost of outputting the same volume of air as compared with the compressor is also increased. Using a low blower, the suction port of this blower is communicated with the hopper via the suction pipe, while the discharge port is communicated with the filler via the granulation pipe, and the blower is driven to drive the resin foam in the hopper. A particle supply apparatus in foam molding configured to suck particles into a blower together with air from a blower suction port through a suction pipe, and to supply resin foam particles to the filler through the granulation pipe together with air blown from the blower discharge port. Has been developed.

  However, according to the particle supply means by the blower, the blower suction port is communicated with the hopper via the suction pipe, and the resin foam particles in the hopper are taken into the blower by the blower intake force, and the blower suction port is discharged from the blower discharge port. Since it is configured to supply resin foam particles to the filler side by air, a large load is applied to the air suction of the blower and sufficient filling speed cannot be obtained, and foam molded products with complicated shapes such as boxes In the case of manufacturing the resin foam, it becomes difficult to fill the resin foam particles to the details in the cavity.

  Furthermore, since the resin foam particles containing the foaming agent pass through the blower, the resin foam particles may be clogged in the blower. In addition, an outlet is provided at the lower end of the hopper, and this outlet and the suction port of the blower are connected by a suction pipe, and the discharge port of the blower and the filler are connected by a particle feeding pipe. There is a problem that the flow path of the resin foam particles to the vessel becomes long, and it is easy to cause a failure such as clogging and the equipment cost is high.

JP-A-8-174551 Japanese Utility Model Publication No. 61-39549

  The present invention has been made in view of such problems, and the object of the present invention is to reduce the occurrence of failures due to clogging, etc., without applying a large load to the blower with a simple structure, An object of the present invention is to provide a particle supply device in foam molding that can smoothly supply and fill resin foam particles in a particle storage portion into a cavity of a mold at a predetermined filling speed.

  In order to achieve the above object, the particle supply device in foam molding of the present invention supplies resin foam particles to a filler through a supply pipe, and fills the resin foam particles into the mold cavity from this filler. In the constructed particle supply apparatus for foam molding, a suction port for the resin foam particles is provided in the tube wall of the proximal end pipe portion of the supply conduit, and the opening proximal end of the proximal end tube portion of the supply conduit is sealed A nozzle is disposed in the center of the proximal tube through the end plate, and the proximal end of the nozzle is connected to the blower outlet, and the air blown from the blower is blown from the blower. Thus, a negative pressure is generated in the base end pipe portion, and an ejector for sucking the resin foam particles into the supply pipe line by the generation of the negative pressure is configured.

  In the particle supply device in the foam molding, the resin particle storage portion that stores the resin foam particles is connected to the suction port of the base end tube portion of the supply pipe line, and the base is supplied by air blown from the blower and ejected from the nozzle. A negative pressure is generated in the end pipe part, and the resin foam particles in the resin particle storage part are sucked into the supply pipe line by the generation of the negative pressure.

  In the particle supply apparatus in the foam molding, in the state where the discharge port of the resin particle storage portion is in communication with the suction port of the base end tube portion of the supply pipe, and is integrally connected, and further, the formation portion of the suction port The nozzle of the ejector is disposed at the center of the base end pipe portion of the supply pipe in the above-mentioned manner so that the front end opening is directed from the suction port forming portion toward the resin foam particle supply direction.

  In the particle supply device in the foam molding, the resin particle storage unit is connected to the suction port of the base end tube part of the supply pipe line via the flow pipe, and further, the supply pipe line in the formation part of the suction port The ejector nozzle is disposed in the center of the base end tube portion with the tip opening portion being directed from the suction port forming portion toward the resin foam particle supply direction.

  In the particle supply apparatus in the above foam molding, the diameter of the suction port is formed larger than the inner diameter of the nozzle, and the inner diameter of the proximal end pipe portion of the supply conduit is formed larger than the diameter of the suction port. It is characterized by being.

 According to the particle supply apparatus in the foam molding of the present invention, the suction port is provided in the tube wall of the proximal end pipe portion of the supply pipe line whose tip is connected to the filler, and the proximal end pipe part of the supply pipe line is provided. A nozzle is disposed in the center of the base tube through the end plate that seals the base of the opening, and the base end of this nozzle is connected to the discharge port of the blower. An ejector that generates a negative pressure in the base end pipe portion by the air ejected from the nozzle and sucks the resin foam particles into the supply pipe line by the generation of the negative pressure constitutes the suction force of the blower. The negative pressure is generated in the proximal pipe part of the supply pipe by taking in outside air without being used to suck in the air and ejecting it as air from the nozzle arranged in the central part of the proximal pipe part of the supply pipe Let the foamed resin particles be sucked into the proximal tube of the supply line Therefore, it is possible to obtain a sufficient supply of foamed resin particles and filling speed by blowing strong air from the nozzle connected to the blower outlet without applying a large load to the blower, etc. Even when a foam molded article having a complicated shape is produced, the resin foam particles can be filled to the details in the cavity.

  In addition, without connecting a suction pipe or the like to the blower, a nozzle is connected to the discharge port, and this nozzle is disposed in the central portion of the proximal end pipe portion of the supply pipe line and on the tube wall of the proximal end pipe portion. Since the suction port for the resin foam particles is provided, it is possible to provide a particle supply device that is simple in structure and relatively inexpensive, and is generated in the proximal pipe portion of the supply pipe line by air ejected from the nozzle. Resin foam particles can be smoothly and reliably taken into the base tube portion together with air through a suction port provided in the tube wall of the base tube portion, and the resin foam particles are supplied by air ejected from the nozzle. The filler can be supplied through a pipe line, and the mold cavity can be filled through the filler.

  Further, as described above, since the resin foam particles do not circulate in the blower, the possibility of clogging of the resin foam particles can be reduced.

  In the particle supply device in the foam molding, the resin particle storage portion that stores the resin foam particles is connected to the suction port of the base end tube portion of the supply pipe line, and the base is supplied by air blown from the blower and ejected from the nozzle. When the negative pressure is generated in the end pipe portion and the resin foam particles in the resin particle storage portion are sucked into the supply pipe line by the generation of the negative pressure, the resin foam particles from the resin particle storage portion Can be continuously supplied to the suction port of the supply pipe.

  In the particle supply apparatus in the foam molding, in the state where the discharge port of the resin particle storage portion is in communication with the suction port of the base end tube portion of the supply pipe, and is integrally connected, and further, the formation portion of the suction port In the case where the nozzle of the ejector is disposed in the central portion of the proximal end pipe portion of the supply conduit in the direction of the resin foam particle supply direction from the suction opening forming portion, A negative pressure is generated around the inside of the proximal end pipe portion of the supply pipe line by the jetted air, and an intake force due to the negative pressure is directly applied to the discharge port of the resin particle housing portion opened in the proximal end pipe portion. The resin foam particles can be easily and efficiently taken into the base tube portion from the resin particle housing portion.

  In the particle supply device in the foam molding, the resin particle storage unit is connected to the suction port of the base end tube part of the supply pipe line via the flow pipe, and further, the supply pipe line in the formation part of the suction port In the case where the nozzle of the ejector is disposed at the center of the base end tube portion with the tip opening portion being directed from the suction port forming portion toward the direction of supplying the resin foam particles, the resin particle containing portion and the supply pipe line Since the base end pipe part is connected via the flow pipe, the arrangement of the resin particle storage part can be designed freely, and the particle supply device can be freely arranged even in a limited space. Can be used.

  Further, in the particle supply device in the foam molding, the diameter of the suction port provided in the tube wall of the base end pipe part rather than the inner diameter of the nozzle provided in the center part in the base end pipe part of the supply pipe line If the inner diameter of the proximal end pipe portion of the supply pipe line is larger than the diameter of the suction port, the base end of the supply pipe line is blown by the air ejected from the nozzle. A negative pressure capable of sucking the resin foam particles from the discharge port of the resin particle container can be generated in the space between the pipe portion and the outer peripheral surface of the nozzle, and the resin foam particles can be smoothly flown in the supply pipeline. Can be efficiently supplied to the filler side while being circulated.

The simplified side view which shows an example of the particle | grain supply apparatus in the foam molding of this invention. The longitudinal side view of the ejector part. The vertical side view of a filling device. The simplified side view which shows another example of the particle supply apparatus in the foam molding of this invention. The simplified side view which shows another example of the particle supply apparatus in the foam molding of this invention.

Next, an example of a particle supply device in foam molding of the present invention will be described with reference to the drawings. In FIG. 1, a mold 1 includes a fixed mold 1a and a movable mold 1b, and a cavity 2 is formed between opposing surfaces of the fixed mold 1a and the movable mold 1b. A filler 3 is attached to the mold 1, and resin foam particles accommodated in a hopper 4 that is a resin particle accommodating portion are supplied to the filler 3 through a supply pipe 5. The cavity 2 of the mold 1 is configured to be filled with resin foam particles. The resin foam particles include those produced by a known method, for example, particles obtained by impregnating resin particles with a foaming agent and then foamed by heating or particles produced by an extrusion foaming method. Resin particles before foaming impregnated with an agent may be used. Moreover, the resin foam particles preferably have a density in the range of 0.01 to 0.5 g / cm ³ from the viewpoint of filling properties.

  The means for supplying the foamed resin particles in the hopper 4 to the filler 3 through the supply pipe 5 is a base pipe serving as a supply start end of the supply pipe 5 immediately below the discharge port 4 a provided at the lower end of the hopper 4. In addition to the arrangement of the portion 5a, the nozzle 7 connected to the discharge port 6a of the blower 6 is arranged at the center of the proximal end tube portion 5a, so that the air supplied from the blower 6 is ejected from the nozzle 7. Thus, an ejector for generating a negative pressure in the base end pipe part 5a is constructed, and a suction force by the negative pressure is applied to the hopper 4 to cause the resin foam particles in the hopper 4 to enter the base end pipe part 5a. The air is taken in and supplied from the nozzle 7 to the filling device 3 through the supply pipe 5. In this ejector structure, not only a blower having an air compression ratio of 2 or less but also a compressor having a compression ratio exceeding 2 can be filled. However, it is preferable to use a blower in consideration of required energy and cost. In particular, the maximum static pressure of the blower is preferably 5 to 40 kPa.

  The base pipe portion 5a of the supply pipe 5 is made of a short rigid pipe having rigidity, and as shown in FIG. 2, the base end side opening end is sealed with an end plate 5d, while the tip end side is closed. The base end of a connecting pipe 5b having a certain length of flexibility is connected to the open end of each of these, and the supply pipe 5 is formed by the base end pipe portion 5a and the connecting pipe 5b. The tip is connected to the inlet 3c of the filler 3.

  Further, a suction port 5c having the same size and the same shape as the discharge port 4a provided at the lower end of the hopper 4 is provided in the upper peripheral portion of the pipe wall in the base end pipe portion 5a of the supply pipe line 5. 4a and the suction port 5c are joined so as to overlap each other so that they are integrally connected and communicated so that the resin foam particles in the hopper 4 are taken into the proximal end pipe portion 5a of the supply pipe line 5. Yes. The suction port 5c of the base end pipe part 5a does not need to be provided at the upper peripheral part of the pipe wall of the base end pipe part 5a, and the discharge port 4a of the hopper 4 does not need to be provided at the lower end of the hopper 4. The outlet 4a and the suction port 5c of the base end pipe part 5a are joined and connected and communicated together, and the resin foam particles in the hopper 4 are configured to be able to suck into the base end pipe part 5a of the supply pipe line 5. Just do it.

  Further, the nozzle 7 constituting the ejector passes through the central portion of the end plate 5d sealing the proximal end opening of the proximal end tube portion 5a, and has a distal end opening portion in the central portion of the proximal end tube portion 5a. Is disposed in a state in which the foamed resin particles are directed in the supply direction of the resin foam particles, and a vent pipe 8 is connected to the base end of the nozzle 7 projecting outward from the end plate 5d of the base end pipe portion 5a. The base end of the vent pipe 8 is connected to the discharge port 6a of the blower 6 installed behind the base end pipe portion 5a, and the air from the blower 6 is pumped to the nozzle 7 through the vent pipe 8, and forward (base) It is configured to be ejected toward the distal end side of the end tube portion 5a.

  The nozzle 7 crosses the lower side of the suction port 5c provided in the proximal end tube portion 5a in the diametrical direction in the center portion of the proximal end tube portion 5a, and the tip of the nozzle 7 corresponds to the proximal end tube portion 5a in the suction port 5c. When the inner diameter of the base tube 5a is L1, the inner diameter of the nozzle 7 is L2, and the diameter of the suction port 5c (discharge port 4a) is L3. In addition, it is preferable that L2 <L3 <L1, and a negative pressure is generated in the proximal end tube portion 5a by the air ejected from the nozzle 7 between the outer peripheral surface of the nozzle 7 and the inner peripheral surface of the proximal end tube portion 5a. When this is done, a space portion is provided in which the resin foam particles from the hopper 4 can be sent forward through the proximal end tube portion 5a.

  On the other hand, the filling device 3 protrudes on the outer peripheral surface of the cylindrical main body 3a with the introduction port 3c communicating with the cylindrical main body 3a and is provided at the tip of the cylindrical main body 3a. It is attached to the mold 1 with the filling port 3b facing the cavity 2 of the mold 1, and as shown in FIG. 3, a piston 3f is attached to the base end of the cylindrical body 3a via a partition wall 3d. A cylinder portion 3e that is slidably mounted is integrally provided, and a bearing portion 3h that is slidably inserted and supported by a biston rod 3g is provided at the center of the partition wall 3d. Further, a valve body 3i for closing the filling port 3b so as to be freely opened and closed is integrally provided at the tip of the piston rod 3g. Further, compressed air supply ports 3j and 3k for advancing and retreating the piston 3f are provided at the base end portion and the tip end portion of the cylinder portion 3e so as to communicate with the cylinder chambers before and after the piston 3f, respectively.

In order to supply and fill the resin foam particles accommodated in the hopper 4 into the cavity 2 of the mold 1 with the particle supply device configured as described above, the piston 3f in the cylinder portion 3e of the filler 3 is retracted. After releasing the closing of the filling port 3b by the valve body 3i attached to the tip of the piston rod 3g and opening the filling port 3b, the blower 6 is operated to take in outside air from the suction port. From the discharge port 6a, air is fed into the vent pipe 8 as air, and the front end of the nozzle 7 provided in the proximal end pipe portion 5a of the supply pipe line 5 through the vent pipe 8 is forward (the front end side of the feed pipe line 5). It spouts toward. The flow rate of air ejected from the tip of the nozzle 7 is preferably 0.5 to 6.0 m ³ / min.

  Then, a negative pressure is generated behind the tip of the nozzle 7 by the energy of the air ejection speed, and the resin foam particles in the hopper 4 opened above the outer peripheral surface of the nozzle 7 are sucked by the generation of the negative pressure. Together with the air in the hopper, it is taken into the base end pipe part 5a from the discharge port 4a of the hopper 4 through the suction port 5c provided in the upper peripheral part of the base end pipe part 5a of the supply pipe line 5, and the nozzle 7 Is supplied from the inside of the proximal end pipe portion 5a of the supply pipe line 5 into the flexible connecting pipe 5b by the air ejected from the supply pipe 5, and further from the connecting pipe 5b by the air pressure flow, the cylindrical main body 3a of the filling device 3 The resin foam particles are filled into the cavity 2 from the filling port 3b at the tip of the cylindrical main body 3a.

  When a certain amount of resin foam particles are filled in the cavity 2, the piston 3f in the cylinder portion 3e of the filler 3 is advanced and the filling port 3b is opened by the valve body 3i attached to the tip of the piston rod 3g. After closing, a heating medium such as water vapor is supplied into the cavity 2 of the mold 1 to foam the resin foam particles in the cavity 2, and the foam particles obtained by foaming the resin foam particles are heat-fused. A foam-molded article can be obtained by attaching and then cooling.

  When a certain amount of resin foam particles are filled in the cavity 2, the air passage is closed on the mold 1 side, and the air fed from the blower 6 flows backward in the connecting pipe 5b. Part of the resin foam particles supplied into the connecting pipe 5b is returned into the hopper 4 from the suction port 5c of the base end pipe part 5a and the discharge port 4a of the hopper through the base end pipe part 5a. The resin foam particles are not completely filled inside. Therefore, after the foamed molded product is taken out from the cavity 2 of the mold 1, when the next foamed molded product is molded, the blower blower is caused by the resin foam particles being densely filled in the supply pipe 5. It is possible to prevent a malfunction of the blower 6 due to an excessive load applied to the 6.

Further, if the filling port 3b of the filling device 3 is excessively squeezed compared to the inner diameter L1 of the proximal end pipe portion 5a, the air is not completely removed in the direction of supplying the resin foam particles, and the resin foam particles are filled into the cavity 2. Since the air sent from the blower 6 may flow backward in the connecting pipe 5b and cause the resin foam particles to flow backward, the cross-sectional area of the base end pipe portion 5a (L1 ² × π / 4)] <(opening area of the filling port 3b) is preferable, but filling of the resin foam particles may be slowed, so 0.9 × [the cross-sectional area of the proximal end tube portion 5a (L1 ² × π / 4)] <(opening area of the filling port 3b) is more preferable.

  In the case of molding the next foam molded product after taking out the foam molded product from the cavity 2 of the mold 1, first, the piston 3f in the cylinder part 3e of the filling device 3 is moved backward to the tip of the piston rod 3g. After closing the filling port 3b by the attached valve body 3i and opening the filling port 3b, the blower 6 is operated to take outside air from the suction port, and the vent pipe 8 from the discharge port 6a. It is fed into the inside as air and is ejected through the vent pipe 8 from the tip of the nozzle 7 provided in the base end pipe portion 5a of the supply pipe 5 toward the front (the front end side of the supply pipe 5). Since the subsequent procedure is as described above, the description thereof is omitted.

  According to the particle supply device, the filling of the resin foam particles from the inside of the filler 3 can be performed by air of 0.1 MPa or less from the blower 6. On the other hand, if the inner diameter L1 of the base end pipe portion 5a of the supply pipe line 5 is too small, when the resin foam particles are filled, the area through which the resin foam particles pass is too small, and the filling efficiency is lowered, but is too large. Then, the filling port 3b of the filler 3 becomes large, and a slit for supplying a heating medium into the cavity of the mold cannot be formed with a pitch width necessary for the mold, and the cavity of the mold is not formed. The required amount of heating medium cannot be supplied, and a good foamed molded product may not be formed, so 15 to 150 mm is preferable.

  In addition, by constructing (inner diameter L1 of the proximal end pipe part 5a) − (inner diameter L2 of the nozzle 7) ≧ 5 mm, a sufficient negative pressure can be generated in the proximal end pipe part 5a and the resin foam particles It is preferable that the resin can be smoothly passed and the resin foam particles can be smoothly filled into the mold cavity.

  Similarly, when the diameter of the suction port 5c (discharge port 4a) is L3 ≧ the inner diameter L2 of the nozzle 7, when filling the resin foam particles into the cavity of the mold, the resin foam particles are introduced from the hopper 4 to the base end. The resin foam particles can be smoothly supplied and filled into the cavity 2 of the mold 1 from the proximal end pipe portion 5a.

  Furthermore, in the above-described embodiment, the nozzle 7 crosses the lower side of the suction port 5c provided in the proximal end tube portion 5a in the diametrical direction, and the distal end thereof is the distal end of the proximal end tube portion 5a in the suction port 5c. The length of the distance L4 from the vertically lower point of the center point of the suction port 5c (discharge port 4a) to the tip of the nozzle 7 is the suction port 5c (discharge port). If it is shorter than the diameter L3 of 4a), it is possible to generate a negative pressure capable of effectively sucking the resin foam particles from the hopper 4 and supplying them to the filler 3 side.

  In the particle supply apparatus in the above foam molding, a hopper is used as the resin particle containing portion 4, and the discharge port 4a of the hopper 4 is joined to and integrally connected to the suction port 5c of the base end tube portion 5a. However, the present invention is not limited to this. For example, the configuration shown in FIG. 4 may be used.

  Specifically, a tank 9 may be used in place of the hopper as the resin particle containing portion 4 for containing the resin foam particles. Specifically, the base end portion of the flow pipe 91 is connected to the inside of the resin particle container 4, and the tip end portion of the flow pipe 91 is connected to the suction port 5c provided on the pipe wall of the base end pipe portion 5a. The resin particle storage part 4 and the base end pipe part 5a are connected via a flow pipe 91. In addition, since the other structure is the same structure as the particle | grain supply apparatus in the foam molding shown in FIGS. 1-3, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In order to supply and fill the resin foam particles accommodated in the tank 9 into the cavity 2 of the mold 1 by the particle supply device configured as described above, the filling port 3b of the filling device 3 is used in the same manner as described above. Is opened, and then the blower 6 is operated to supply air from the front end of the nozzle 7 provided in the proximal end pipe portion 5a of the supply pipe line 5 toward the front (the front end side of the supply pipe line 5). Erupt.

  Then, a negative pressure is generated behind the tip of the nozzle 7 by the energy of the jet speed of the air, and the inside of the tank 9 passes through the suction port 5c of the proximal end pipe portion 5a opened above the outer peripheral surface of the nozzle 7 and the flow pipe 91. The resin foam particles are sucked by the generation of the negative pressure and together with the air in the tank 9 through the flow pipe 91, the base end pipe part 5a is passed through the suction port 5c provided in the pipe wall of the base end pipe part 5a of the supply pipe line 5. It is taken in and supplied from the proximal end pipe portion 5a of the supply pipe line 5 into the flexible connecting pipe 5b by the air ejected from the nozzle 7, and further from the connecting pipe 5b by the pressure flow of the air. It is supplied into the cylindrical main body 3a of the filling device 3, and the resin foam particles are filled into the cavity 2 from the filling port 3b at the tip of the cylindrical main body 3a. Since the subsequent procedure is the same as that of the particle supply apparatus in the foam molding shown in FIGS.

  Moreover, in the particle supply apparatus in the above-described foam molding, the hopper 4 or the tank 9 is exemplified as the resin particle storage unit that stores the resin foam particles, but the resin particle storage unit is not limited to these, and As shown in FIG. 5, the resin particle storage portion is not necessarily required, and the resin foam particles are directly introduced into the suction port 5c of the proximal end tube portion 5a, and the blower 6 is operated to cause the proximal end tube of the supply conduit 5 Of the proximal tube portion 5a by the negative pressure generated behind the distal end of the nozzle 7 obtained by jetting air from the distal end of the nozzle 7 provided in the portion 5a toward the front (the distal end side of the supply conduit 5). The resin foam particles may be structured to be taken into the proximal end pipe portion 5a through the suction port 5c.

  Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to the examples.

(Examples 1-4)
The particle supply apparatus shown in FIGS. Using a blower 6 with a maximum static pressure of 24 kPa, the inner diameter L1 of the proximal end pipe portion 5a, the inner diameter L2 of the nozzle 7, the diameter L3 of the suction port 5c (discharge port 4a), and the suction port 5c (discharge port 4a) The conditions shown in Table 1 are the distance L4 from the vertically lower point of the center point to the tip of the nozzle 7, the air flow rate from the nozzle 7, the wind speed generated at the suction port 5c (discharge port 4a), and the opening area of the filling port 3b. The filling time required for filling the expandable polystyrene resin particles having a bulk density of 0.017 g / cm ³ or 0.027 g / cm ³ into the cavity 2 of the mold 1 was measured. It was shown to.

  As can be seen from Table 1, in any of the embodiments, filling of the expandable polystyrene resin particles into the cavity 2 of the mold 1 from the hopper 4 can be performed within 20 seconds, and the nozzle 7 The filling time is shortened by increasing the flow rate of air from. This is because the generated negative pressure increases, and the wind speed at the suction port 5c (discharge port 4a) due to the suction force of the negative pressure increases.

1 Mold 2 Cavity 3 Filler 4 Hopper
4a Discharge port 5 Supply pipeline
5a Base tube
5c Suction port 6 Blower 7 Nozzle 9 Tank
91 Distribution pipe

Claims (5)

In the foam supply particle supply apparatus configured to supply the resin foam particles to the filler through the supply pipe and to fill the resin foam particles into the cavity of the mold from the filler, the base pipe of the supply pipe A suction port for resin foam particles in the tube wall of the portion, and a nozzle at the center of the proximal end tube portion through the end plate that seals the open proximal end of the proximal end tube portion of the supply conduit And connecting the base end portion of the nozzle to the blower outlet, generating negative pressure in the base end pipe portion by the air fed from the blower and ejected from the nozzle, and the resin foam particles An ejector that sucks into the supply pipe line by the generation of the negative pressure constitutes a further distance L4 from the center point of the suction port to the tip of the nozzle is shorter than the diameter L3 of the suction port. In the foam molding, characterized by Feeding device. A resin particle containing part for containing resin foam particles is connected to the suction port of the base end pipe part of the supply pipe, and negative pressure is generated in the base end pipe part by the air blown from the blower and ejected from the nozzle. 2. The particle supply device in foam molding according to claim 1, wherein the resin foam particles in the resin particle storage portion are configured to be sucked into the supply pipe line by the generation of the negative pressure. The discharge port of the resin particle storage portion is connected to the suction port of the proximal end tube portion of the supply pipeline so as to be connected integrally, and further, the proximal end tube of the supply pipeline in the formation portion of the suction port 3. The particle in foam molding according to claim 2, wherein the nozzle of the ejector is disposed at the center of the portion so that the tip opening is directed from the suction port forming portion toward the direction of supplying the resin foam particles. Feeding device. A resin particle container is connected to the suction port of the base end pipe part of the supply pipe line via a flow pipe, and further, an ejector is provided at the center of the base end pipe part of the supply pipe line in the formation part of the suction port 3. The particle supply device in foam molding according to claim 2, wherein the nozzle has a tip opening portion directed from a portion where the suction port is formed toward a direction in which resin foam particles are supplied. The diameter of the suction port is formed larger than the inner diameter of the nozzle, and the inner diameter of the proximal end pipe portion of the supply pipe is formed larger than the diameter of the suction port. The particle supply apparatus in foam molding of any one of -4.

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