JP4326312B2 - Manufacturing method and apparatus for resin molding - Google Patents

Description

The present invention relates to a resin molding manufacturing method and apparatus.
The manufacturing method and apparatus of the present invention include, for example, automobile side moldings, step moldings, door belt moldings, wheel arch moldings, bumper moldings, hood top moldings, front wind moldings, roof drip moldings, quarter wind moldings, roof moldings, and the like. Can be used for manufacturing.

The resin molding which is a long thing of predetermined cross-sectional shape is manufactured by cut | disconnecting the resin molding material continuously extruded from an extruder for every predetermined length.
In FIG. 3, an example of the conventional manufacturing procedure of the resin molding for motor vehicles is shown.
The resin molding material having a predetermined cross-sectional shape that is continuously extruded from the extrusion molding machine 1 is cooled by passing through the cooling water in the cooling tank 2 while being drawn by the take-up machine 3 with a certain strength. Further, an adhesive is applied by an adhesive applicator 106, flocked by an electrostatic flocking machine 107, cut into predetermined lengths by a cutting machine 108, and dried by a drier 109. In this way, the long material W1 which is straight and has a predetermined length is obtained one after another.
Next, each long material W1 is heated by the heater 204 and then sent to the press device 205A and subjected to press bending, or sent to the bender device 205B and bent. Here, the press bending process is a processing method for obtaining a long object having a curvature along the press die surface by pressing the long material W1 between the press dies, and each portion in the longitudinal direction is obtained in a desired manner. Used when you want to bend into curvature. Bender bending, on the other hand, is a processing method for obtaining a long object with a constant curvature by holding both ends of a long material W1 with a chuck and pressing it against a mold while pulling, and the curvature is constant throughout the longitudinal direction. Used when you want to bend In addition, although it is not the technique about resin molding, an example is described in patent document 1 about a press bending process, and an example is described in patent document 2 about a vendor bending process.

JP-A-8-216245. Japanese Patent Laid-Open No. 5-212452.

In the conventional procedure shown in FIG. 3, each long material W <b> 1 obtained by cutting the resin molding material continuously fed out for each predetermined length is bent. In other words, the individual long materials W1 are sequentially fed between the press dies and pressed (in the case of pressing), or the individual long materials W1 are gripped by the chuck and pressed against the mold (bender). In case of processing).
For this reason, there exists a malfunction that a man-hour increases and it becomes complicated and becomes high-cost.
It is an object of the present invention to eliminate the increase in man-hours and complications caused by bending each individual long material, and to obtain a resin molding at low cost.

The present invention is configured as the following [1] to [4]. In addition, a code | symbol is attached | subjected for understanding easily and is not the meaning which limits this invention to the structure of a code | symbol.
[1] Configuration 1:
A manufacturing method for manufacturing a resin molding having a predetermined length from a resin molding material having a predetermined cross-sectional shape continuously extruded from the extrusion molding machine 1,
A heating process in which the resin molding material sent out from the extrusion molding machine 1 and continuously conveyed is guided to the heating tank 4 and is heated in the heating tank 4;
Resins of the tensioned state while traveling in a resin molding material followed by the cooling tank 50 is guided to the next stage of the cooling tank 50 tensioned state after continuously sent out come that by heat treatment from the heating chamber 4 cooling bending process causes a predetermined bending deformation by the direction crossing the traveling direction with respect to the mall material using rollers 53 for pressing applying a pressing force,
A cutting step of cutting the resin molding material after the cooling bending treatment every predetermined length,
The manufacturing method of the resin molding characterized by implementing.

As the heating process, a heating process (annealing process) performed in a conventional extrusion line can be used as it is. As the heating tank 4, for example, a hot water tank in which the water temperature is maintained at about 60 to 90 ° C, preferably about 60 to 80 ° C can be used.
The heating method is not limited to warm water heating. For example, it may be heated by introducing a resin molding material into a heating tank filled with air maintained in the above temperature range and proceeding, or may be heated by blowing warm air. Moreover, you may heat using a heater. In heating with hot air or heating with a heater, the heating tank can be omitted on the condition that the heating capacity is not impaired. When the heating tank is omitted, the “heating tank” in Configuration 1 is defined as “a space for heating”.
In the cooling and bending step, the roller that applies the pressing force to the resin molding material may be single or plural. The number of rollers, the arrangement, the magnitude of the pressing force, the direction of the pressing force, and the timing of pressing are appropriately determined according to the desired bending deformation shape.
As the cooling tank 50, for example, a cooling water tank in which the water temperature is maintained in the range of 5 to 15 ° C, preferably 5 to 10 ° C can be used.
The cooling method is not limited to the water cooling method, and may be an air cooling method. In the case of the air cooling system, it is possible to omit the cooling tank on condition that the cooling capacity is not impaired. When the cooling tank is omitted, the “cooling tank” in Configuration 1 is defined as “a space for cooling”.

[2] Configuration 2:
In configuration 1,
By applying the pressing force through the roller 53 in the cooling bending process in a predetermined direction, at a predetermined strength, and at a predetermined timing, bending deformation with a predetermined curvature is caused for each predetermined part of the resin molding material. Let
The manufacturing method of the resin molding characterized by the above-mentioned.
Configuration 2 is used when it is desired to bend each part in the longitudinal direction to a desired curvature.

[3] Configuration 3:
In configuration 1,
The resin molding material is caused to bend and deform with a certain curvature by continuously applying a pressing force through the roller 53 in the cooling bending process in a certain direction and with a certain strength.
The manufacturing method of the resin molding characterized by the above-mentioned.
Configuration 3 is used when it is desired to bend so that the curvature is constant over the entire length.

[4] Configuration 4:
A manufacturing apparatus for manufacturing a resin molding having a predetermined length from a resin molding material having a predetermined cross-sectional shape continuously extruded from an extrusion molding machine,
A heating device that is provided at the subsequent stage of the extrusion molding machine, introduces the resin molding material that is fed out from the extrusion molding machine and continuously conveyed to the heating tank, and heat-treats while advancing the inside of the heating tank;
Wherein provided on the subsequent stage of the heating device, wherein the heating tank of the tensioned state while proceed by introducing subsequently continuously sent out that come resin molding material into the cooling tank cooling bath in tensioned state a cooling bending apparatus to cause a predetermined bending deformation by applying a pressing force with a roller for pressing a direction intersecting the traveling direction with respect to the resin molding material,
A cutting device that is provided at a subsequent stage of the cooling bending device, and obtains a resin molding by cutting the resin molding material after the cooling bending treatment at predetermined lengths;
An apparatus for manufacturing a resin molding, comprising:

In the configuration 1, the resin molding material after the heat treatment is continuously guided to the cooling tank 50 and is advanced in the cooling tank 50 in a stretched state, while passing through the pressing roller 53 in a direction crossing the traveling direction. A pressing force is applied to bend and deform into a predetermined shape, and the resin molding material bent into the predetermined shape is cut into predetermined lengths. For this reason, it is not necessary to bend each individual long material, and it is possible to eliminate the increase in man-hours and complications associated with bending each individual long material. You can get a mall.
In the configuration 2, the pressing force through the roller 53 is applied in a predetermined direction, with a predetermined strength, and with a predetermined timing, whereby bending deformation with a predetermined curvature is performed for each predetermined part of the resin molding material. Is born. Therefore, by appropriately setting the direction of the pressing force, the strength of the pressing force, and the timing of the pressing, each part in the longitudinal direction can be bent to a desired curvature so as to match the target resin molding. .
In the configuration 3, the pressing force through the roller 53 is continuously applied in a constant direction with a constant strength, and thereby bending is performed so that the curvature is constant over the entire length direction. . Therefore, by appropriately setting the direction and strength of the pressing force, the pressing force can be bent so as to have a certain curvature that matches the target resin molding.
In the configuration 4, an apparatus capable of performing the manufacturing method of the configuration 1 can be provided.

Hereinafter, a specific example of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory diagram schematically showing the configuration of the resin molding manufacturing apparatus of the embodiment, and FIG. 2 is an explanatory diagram showing the configuration of the water cooling tank / bending device 5 in FIG. 1 and 2, the same components as those in FIG. 3 showing the conventional example are denoted by the same reference numerals, and description thereof is omitted. Further, in the adhesive material applicator 6, the electrostatic flocking machine 7, the cutting machine 8, and the dryer 9 in FIG. 1, the processing object is a resin molding material after the bending process, whereas in FIG. The adhesive material applicator 106, the electrostatic flocking machine 107, the cutting machine 108, and the dryer 109 are the same except that the processing object is a resin molding material before the bending process. The description of is also omitted.

The hot water heating tank 4 is a tank filled with hot water whose water temperature is maintained in the range of 60 to 90 ° C., preferably 60 to 80 ° C., and the introduction part and the outlet part of the resin molding material are sealed in a watertight manner. Further, in the hot water heating tank 4, the resin molding material is advanced at a constant speed (a constant speed synchronized with the extrusion speed of the extrusion molding machine 1 and the take-up speed of the take-up machines 3 and 3 b) in the hot water heating tank 4. The transport roller group is appropriately provided.
As the hot water heating tank 4, a hot water heating tank provided for heat treatment (annealing treatment) in a conventional extrusion molding line can be used as it is.

  Next, the resin molding material W0 heat-treated in the hot water heating tank 4 is introduced into the water cooling tank 50 of the water cooling tank / bending device 5. The water cooling tank 50 is filled with cooling water maintaining the water temperature in the range of 5 to 15 ° C., preferably 5 to 10 ° C. In addition, the inlet and outlet of the water cooling tank 50 are sealed in a watertight manner by the seal members 501, respectively.

  The resin molding material W0 introduced into the water cooling tank 50 from the water-tightly sealed introduction port includes a pair of conveyance rollers 51a and 51b provided on the inlet side, and a pair of conveyance rollers 55a and 51a provided on the outlet side. 55b is conveyed at a constant speed (a constant speed synchronized with the extrusion speed of the extrusion molding machine 1 and the take-up speed of the take-up machines 3 and 3b), thereby being cooled.

  Further, in the water cooling tank 50, a support roller 52, a pressure roller 53, and a support roller 54 are provided between the pair of transport rollers 51a and 51b on the inlet side and the pair of transport rollers 55a and 55b on the outlet side. In addition, a pressing force is applied to the resin molding material W0 that is cooled while being transported as described above in the direction that intersects the transport direction (more precisely, the direction that intersects the transport direction within the plane including the transport direction). In this way, the resin molding material W0 is bent by receiving the pressing force through the rollers 52, 53, and 54.

The curvature of the bending process and the part to be subjected to the bending process (part in the longitudinal direction) are determined by the set positions of the rollers 52, 53, and 54, and the advance / retreat timing to the set position.
For example, after the head of the resin molding material W0 has passed, the rollers 52, 53, and 54 are advanced to set a predetermined position for pressing / supporting the resin molding material W0. The molding material W0 is bent so that the entire region in the longitudinal direction has a constant curvature (a constant curvature determined by the set position). Here, the advancement and setting of the rollers 52, 53, and 54 to predetermined positions are performed by controlling the drive mechanisms 52d, 53d, and 54d by a control signal from the controller 59, and the respective support rods 52e, 53e, and 54e. Can be realized by extending the length to a predetermined length and holding the length.

On the other hand, the rollers 52, 53 and 54 are advanced to set a predetermined position for pressing / supporting the resin molding material W0, and after a predetermined time, the rollers are retracted to the original position, and thereafter, at predetermined time intervals (target resin molding). When the advancing / setting and the evacuation after a predetermined time are repeated at a time interval determined by the passage length of the resin, the resin molding material W0 is moved in the longitudinal direction after the advancing / setting and the predetermined time. It is bent with a curvature determined by the evacuation. The advancement / setting and the subsequent retraction can be realized by extending / contracting the support rods 52e, 53e, 54e by a control signal from the controller 59, as in the case of the bending process with the constant curvature. In addition, the elapsed timing of the predetermined time interval is monitored by an encoder for an amount related to the progress of the resin molding material W0 (eg, the number of rotations of the drive shaft of any of the transport rollers), and the signal is sent to the controller 59 It can be obtained by taking in.
It is assumed that the controller 59 is preset with a value for realizing the above control that matches the target curvature.

  The resin molding material W0 bent while being cooled in the water cooling tank / bending device 5 is led out of the water cooling tank 50 from the outlet sealed watertight by the seal member 501, and taken up by the take-up machine 3b. Thereafter, the processing is performed by the adhesive applicator 6, the electrostatic flocking machine 7, the cutting machine 8, and the dryer 9, thereby obtaining the target resin molding.

In the illustrated example, the bending process is performed by three rollers 52, 53, and 54. However, in the present invention, the number of rollers may be one, two, or four or more.
For example, when the distance between the entrance-side transport roller pair 51a, 51b and the exit-side transport roller pair 55a, 55b is sufficiently short and there is no problem in supporting the resin molding material W0, one of the support rollers 52 and 54 is used. Or both may be omitted.
When the resin molding material W0 is to be bent in the opposite direction to the illustrated example, the resin molding material W0 is pressed together with the pressing roller 53 in a direction opposite to the pressing direction by the pressing roller 53. A roller may be further provided. In that case, you may further provide the support roller for rollers which press to the said opposite direction as needed.

  In the illustrated example, the distance in the traveling direction between the pressing roller 53 and the supporting rollers 52 and 54 on both sides thereof, and the distance in the direction orthogonal to the traveling direction (mutual penetration amount) are particularly mentioned. However, it is possible to adjust the curvature of bending of the target resin molding by appropriately setting these.

In the illustrated example, the water cooling tank / bending device 5 is a device that cools the resin molding material W0 by a water cooling method, but an air cooling method device may be used instead of the water cooling method. Furthermore, in the case of adopting an air cooling system, the cooling tank may be omitted on the condition that the cooling capacity is not impaired. In other words, the resin molding material W0 may be cooled by blowing cooling air in the open space. In that case, if necessary, heat insulation means such as an air curtain may be provided so as not to escape the cold air.
A similarly modified configuration may be adopted for the cold water cooling tank 2 and the hot water heating tank 4.

Explanatory drawing which shows the structure of the resin molding manufacturing apparatus of embodiment typically. Explanatory drawing which shows the structure of the water cooling tank and the bending apparatus 5 in FIG. Explanatory drawing which shows the structure of the conventional resin molding manufacturing apparatus typically.

Explanation of symbols

4 Hot Water Heating Tank 5 Water Cooling Tank / Cooling Bending Device 50 Cooling Tank 51a, 51b Conveying Roller Pair 52 Support Roller 52d Support Roller Driving Mechanism 53 Pressing Roller 53d Pressing Roller Driving Mechanism 54 Supporting Roller 54d Supporting Roller Driving Mechanism 55a, 55b Conveying Roller 501 Watertight seal W0 Resin molding material

Claims (4)

A manufacturing method for manufacturing a resin molding having a predetermined length from a resin molding material having a predetermined cross-sectional shape continuously extruded from an extruder,
A heating process in which the resin molding material sent out from the extruder and continuously conveyed is guided to the heating tank and heat-treated while advancing in the heating tank;
The resin molding material continuously sent out the while advancing the cooling tank is guided to the next stage of the cooling bath in tensioned state and subsequently the resin molding material after the heat treatment that come tensioned state from the heating chamber bending process cooling causing a predetermined bending deformation by applying a pressing force with a roller for pressing a direction intersecting the traveling direction for,
A cutting step of cutting the resin molding material after the cooling bending treatment every predetermined length,
The manufacturing method of the resin molding characterized by implementing. In claim 1,
By applying a pressing force through the roller in the cooling bending process in a predetermined direction, at a predetermined strength, and at a predetermined timing, a bending deformation having a predetermined curvature is caused for each predetermined portion of the resin molding material. ,
The manufacturing method of the resin molding characterized by the above-mentioned. In claim 1,
The resin molding material is caused to bend and deform with a certain curvature by continuously applying a pressing force through the roller in the cooling bending process in a certain direction and with a certain strength.
The manufacturing method of the resin molding characterized by the above-mentioned. A manufacturing apparatus for manufacturing a resin molding having a predetermined length from a resin molding material having a predetermined cross-sectional shape continuously extruded from an extrusion molding machine,
A heating device that is provided at the subsequent stage of the extrusion molding machine, introduces the resin molding material that is fed out from the extrusion molding machine and continuously conveyed to the heating tank, and heat-treats while advancing the inside of the heating tank;
Wherein provided on the subsequent stage of the heating device, wherein the heating tank of the tensioned state while proceed by introducing subsequently continuously sent out that come resin molding material into the cooling tank cooling bath in tensioned state a cooling bending apparatus to cause a predetermined bending deformation by applying a pressing force with a roller for pressing a direction intersecting the traveling direction with respect to the resin molding material,
A cutting device that is provided at a subsequent stage of the cooling bending device, and obtains a resin molding by cutting the resin molding material after the cooling bending treatment at predetermined lengths;
An apparatus for manufacturing a resin molding, comprising:

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