JP5273485B2 - Weather strip manufacturing method - Google Patents

Description

  The present invention relates to a method for producing a weather strip having an extrusion molded part formed by extrusion molding and a mold molded part formed by connecting the extrusion molded parts by mold molding. The present invention relates to a method for producing a weather strip including molding and a method for forming a surface treatment layer.

  Conventionally, as shown in FIG. 4, a weather strip 101 includes an extrusion molding portion 102 formed by extrusion molding and a molding portion 103 formed by connecting ends of the extrusion molding portion 102 by molding. It was formed and attached to the door of the car body and the periphery of the opening. And the extrusion molding part 102 was attached to the upper side part and vertical side part of the door or opening part periphery of a vehicle body, and the shaping | molding part 103 was attached to those corner parts (for example, refer patent document 1).

  A surface treatment layer is provided on the surface of the weather strip 101 to make it a low-sliding layer in order to reduce frictional resistance with door glass and other members, or as a decorative layer for decoration. . In this case, in the extrusion molding unit 102, a surface treatment layer is formed on the surface in a heated state after vulcanization after being vulcanized in a vulcanization tank continuously after extrusion (for example, Patent Documents 2 and 3).

  In the mold forming unit 103, after the mold forming, a surface treatment layer is formed on the surface of the mold forming unit 103 as post-processing (see, for example, Patent Document 1). Molding and post-processing were performed separately. In this case, in order to increase the adhesion strength of the surface treatment layer, it was preferable to pre-heat the molded part before forming the surface treatment layer. Large equipment was required for this preheating, coating and drying of the surface treatment layer.

  For example, as shown in FIG. 5, in a rotary paint drying apparatus 220, a preheated weather strip 201 is attached to a rack 221, the rack 221 is rotated, and a surface treatment agent is applied by spray guns 222 and 222. Later, the inside of the drying furnace 223 is rotated to dry the surface treatment agent (see, for example, Patent Document 4).

Such a coating drying apparatus 220 is large and difficult to place near the mold molding machine, and the mold forming part is cooled in the process of transporting the weather strip 201 from the mold molding machine to the coating drying apparatus 220. Therefore, it was necessary to preheat the molded part before painting.
In addition, a large amount of heat is required for preheating, and a large number of work-in-process items are required for the coating and drying process, so productivity is not good.

Japanese Patent Laid-Open No. 10-166868 JP-A-4-189134 JP-A-9-220933 JP 2006-205062 A

  The present invention provides a method for producing a weather strip that can form the surface treatment layer of the molded portion of the weather strip in an energy efficient and inexpensive manner.

In order to solve the above-mentioned problems, the present invention of claim 1 is directed to manufacturing a weather strip having an extruded part formed by extrusion molding and a molded part formed by connecting the extruded parts by molding. In the method
The mold part is formed by a mold part molding machine that molds the mold part, and a coating drying device that forms a surface treatment layer by applying a surface treatment agent to the surface of the mold part,
A paint dryer is installed near the molding machine.
The coating dryer is a set area for setting the mold part on the pallet, a drying area for drying the surface treatment layer adjacent to the lower part of the set area, and a coating for applying the surface treatment agent adjacent to the lower part of the drying area. And have an area
In the painting area, there is a surface treatment agent application device that can slide in the horizontal direction and apply the surface treatment agent.
The pallet is slidable in the vertical direction so that the weather strip can be positioned in the set area, the drying area, and the painting area, respectively, and the slide axis of the surface treatment agent application device in the painting area. Provided so that the angle of the surface of the pallet changes with respect to the direction,
The weather strip is set on the pallet in the set area as soon as the molding part connecting the extrusion molding part is formed.
After that, the pallet moves into the painting area, the surface treatment agent application device slides and slides in the horizontal direction, the pallet rotates, and the surface treatment agent is applied to the mold part,
Further, the pallet is a weather strip manufacturing method characterized in that the pallet is moved into a drying area to dry the surface treatment agent in the molding part to form a surface treatment layer.

  In the first aspect of the present invention, the mold forming section is formed by a mold forming section molding machine that molds the mold forming section and a coating drying device that forms a surface treatment layer by applying a surface treatment agent to the surface of the mold forming section. Then, a paint drying apparatus is installed in the vicinity of the molding part molding machine. For this reason, after shaping | molding a shaping | molding part with a shaping | molding part shaping | molding machine, a shaping | molding part can be set to a coating drying apparatus immediately. And the high temperature immediately after molding of the molded part can be used, and coating and drying can be performed before cooling after molding, and the surface treatment layer can be formed without preheating, contributing to energy saving In addition, the adhesive strength of the surface treatment layer can be increased.

The coating dryer is a set area for setting the mold part on the pallet, a drying area for drying the surface treatment layer adjacent to the lower part of the set area, and a coating for applying the surface treatment agent adjacent to the lower part of the drying area. And have an area. For this reason, a coating drying apparatus can be made compact and a coating drying apparatus can be installed adjacent to a shaping | molding part molding machine.
Since the drying area is located above the painting area, the molded part of the weather strip can be transferred to the drying area quickly by simply moving the pallet. Can be dried immediately.

In the painting area, a surface treatment agent application device that can slide in the horizontal direction and applies the surface treatment agent is provided, so that the surface treatment agent can be applied over the entire range in the lateral direction of the molded part. .
Since the pallet is provided so as to be able to rotate so that the angle of the surface of the pallet changes with respect to the axial direction of the slide of the surface treatment agent application device within the coating area, A surface treatment agent can be applied, and a surface treatment layer can be formed on a predetermined surface of a mold forming portion together with a slide of a surface treatment agent application device.

  The pallet is slidable in the vertical direction so that the weather strip can be positioned in each of the set area, the painting area, and the drying area. For this reason, the weather strip mold forming part can be positioned in the painting area, drying area and set area by a compact mechanism that only moves the pallet up and down, and a surface treatment layer can be quickly applied to the mold forming part after mold forming. Can be formed.

  As soon as the molded part that connects the extruded parts is molded, the weather strip is set on the pallet in the set area, then the pallet moves into the painting area and the surface treatment agent is applied. The apparatus slides and slides in the horizontal direction, the pallet rotates, the surface treatment agent is applied to the mold forming part, and continuously, the pallet moves into the drying area, and the surface treatment agent in the mold forming part is removed. It is made to dry and a surface treatment layer is formed.

Therefore, the surface treatment layer can be formed in the high-temperature mold part after molding without preheating, and the energy cost can be reduced. In addition, the paint drying apparatus can be made compact, and can be installed in the vicinity of the molding part molding machine.
Furthermore, the paint drying process can be shortened, the number of weather strips in the process can be reduced, and productivity can be improved.

  The present invention of claim 2 is a weather strip manufacturing method in which the movement of the pallet to the setting area, the drying area, and the painting area is automatically operated.

  In the present invention of claim 2, since the pallet is automatically moved to the set area, the drying area, and the painting area, the painting drying process can be automatically facilitated with a compact facility.

  The present invention of claim 3 is a weather strip manufacturing method in which the lateral slide of the surface treatment agent coating apparatus and the rotation of the pallet in the coating area are controlled synchronously.

  In the present invention of claim 3, since the slide in the horizontal direction of the surface treatment agent coating apparatus and the rotation of the pallet in the coating area are controlled synchronously, the surface of the mold forming portion of the weather strip is automatically and reliably secured. A surface treatment agent can be applied to the surface.

  The present invention of claim 4 is a method of manufacturing a weather strip, wherein the mold forming portion is a corner portion of the weather strip.

  In the present invention of claim 4, since the mold forming portion is a corner portion of the weather strip, the corner portion of the weather strip can be attached along the peripheral edge corner portion of the opening portion of the door frame or the vehicle body, Sliding resistance with the door glass or door frame at the corner of the weather strip can be reduced.

  According to a fifth aspect of the present invention, there is provided a method for producing a weather strip in which a molding part molding machine has a mold for molding a molding part and a material injection device, and a coating drying device is installed adjacent to the die. It is.

  In the present invention of claim 5, the molding part molding machine has a mold for molding the molding part and a material injection device, and a coating drying apparatus is installed adjacent to the mold, so that molding is performed with the mold. Immediately after that, the molded part can be transferred to a paint drying apparatus.

In the present invention, the coating drying apparatus has a set area, a drying area, and a coating area that are lined up and down, so that the coating drying apparatus can be made compact, and the coating drying apparatus is adjacent to the molding unit molding machine. A device can be installed.
The surface treatment agent coating device is provided so as to be slidable in the horizontal direction within the painting area, and the pallet is designed so that the angle of the surface of the pallet changes with respect to the axial direction of the slide of the surface treatment agent coating device within the painting area. Since it is provided so that rotation is possible, a surface treatment layer can be formed in the predetermined surface of a shaping | molding part.

  The weather strip is set on the pallet as soon as the molding part connecting the extrusion part is formed, then the pallet moves into the painting area, the pallet rotates, The surface treatment agent is applied to the mold part, moved into the drying area, the surface treatment agent in the mold part is dried, and the surface treatment layer is formed. Thus, the surface treatment layer can be formed. The paint drying apparatus can be made compact, and can be installed in the vicinity of the molding part molding machine.

1 is a perspective view of a molding part molding machine and a coating drying device in an embodiment of the present invention. It is the perspective view seen from diagonally upward of the coating drying apparatus in embodiment of this invention. It is a front view of the coating drying apparatus in embodiment of this invention. It is a perspective view of the corner part of the weather strip in embodiment of this invention. It is the perspective view seen from diagonally upward of the conventional coating drying apparatus.

  An embodiment of the present invention will be described with reference to FIGS. The present invention relates to a method of manufacturing a weather strip 1 having an extrusion molded part formed by extrusion molding and a mold forming part formed by connecting ends of two extrusion molded parts by molding. . In the present embodiment, as shown in FIG. 4, the extrusion molding part of the weather strip 1 includes a straight part 2 attached to the vertical side part and the upper side part of the door frame or the periphery of the opening of the vehicle body, and the molding part is A description will be given by taking as an example a case that is attached to the corner 3 of the door frame or the periphery of the opening of the vehicle body.

  In the case of rubber, the linear portion 2 which is an extrusion molding portion of the present embodiment is sent to a vulcanizing tank (not shown) after being extruded by an extruder (not shown) and heated in the vulcanizing tank. After that, while maintaining the high temperature, urethane resin or silicon resin, which is a low sliding member, is continuously applied to a predetermined surface, a surface treatment layer is formed, and after cooling, it is cut into a predetermined dimension. The The cut straight part 2 is hung on a work rack 13 shown in FIG. 1 in order to form the corner part 3.

In the case of a thermoplastic elastomer, urethane resin or silicon resin, which is a low sliding member, is applied to a predetermined surface immediately and continuously after being extruded and heated by an extruder.
For this reason, in the case of rubber and thermoplastic elastomer, since the surface treatment agent is applied to the base material in a hot state, the surface treatment layer is formed by firmly adhering to the base material of the linear portion 2. Can do.

Next, molding of the corner portion 3 which is a mold forming portion will be described with reference to FIG.
Molding of the corner part 3 which is a mold forming part is performed by a mold forming part molding machine 10. The mold forming part molding machine 10 holds a material extruding device 11 for injecting a material for forming the corner part 3, a corner molding die 12 for forming the corner part 3, and the straight part 2 before forming the corner part 3. The work rack 13 is configured.

  The corner portion 3 is formed by opening the corner molding die 12 and end portions of the two linear portions 2 hung on the work rack 13 at both ends of the cavity forming the lower corner portion 3 of the corner molding die 12. Set. And the upper mold | type of the corner molding metal mold | die 12 is closed so that the edge part of each linear part 2 may be pinched | interposed.

Then, the corner molding die 12 is moved upward together with the linear portion 2 by the die push-up cylinder 14 provided below the corner molding die 12, and the corner molding die 12 is moved from the nozzle of the material extrusion device 11. Inject material into the cavity. When the material is rubber, it is heated and vulcanized in the cavity, and immediately set in the coating drying apparatus 20 described later. In the case of a thermoplastic elastomer, the material is injected into the cavity, and immediately after molding, the material is set in a coating drying apparatus 20 described later.
In the case of rubber, EPDM rubber can be used. In the case of a thermoplastic elastomer, an olefin-based thermoplastic elastomer can be used.

  The paint drying device 20 is disposed adjacent to the mold part molding machine 10. As shown in FIGS. 2 and 3, the coating drying apparatus 20 is formed in a box shape, and a set area 50 for setting the corner portion 3 of the weather strip 1 from above, and a drying area 60 for drying the corner portion 3. The pallet raising / lowering mechanism 30 for moving the pallet 33 for setting the corner portion 3 in each area is formed in the lower portion of the painting area 70, and is formed from the coating area 70 for applying the surface treatment agent to the corner portion 3. A pallet rotating mechanism 40 that rotates the pallet 33 at 70 is formed on the side wall of the painting area 70.

  The pallet elevating mechanism 30 includes a pallet 33 that holds a part of the corner portion 3 of the weather strip and a portion of the straight portion 2 at both ends thereof, a pallet column 36 that extends from both ends of the lower surface of the pallet 33, and the pallet 33. The first cylinder 31 and the second cylinder 32 are moved up and down in the vertical direction, the first rod 34 is attached to the first cylinder 31, and the second rod 35 is attached to the second cylinder 32. The first cylinder 31 and the second cylinder 32 are driven by means such as air or hydraulic pressure, and the pallet 33 is positioned in the set area 50 at the upper end, positioned in the drying area 60 at the center, and positioned in the painting area 70 at the lower end. Can be made.

  In order to raise the pallet 33, first the first cylinder 31 works, and the first rod 34 moves upward and enters the first cylinder 31. Then, the pallet column 36 and the pallet 33 move upward, and the pallet 33 enters the drying area 60 from the painting area 70. Thereafter, the second cylinder 32 works, and the second rod 35 moves upward and exits from the second cylinder 32. Then, the pallet column 36 and the pallet 33 move upward, and the pallet 33 enters the set area 50 from the drying area 60. The descending of the pallet 33 is the opposite.

  As described above, the first cylinder 31 and the second cylinder 32 are provided because the cylinder is provided in a narrow portion below the painting area 70 and the pallet 33 is moved greatly from the setting area 50 to the painting area 70. This is because it was made possible. If there is a sufficient length below the painting area 70, one cylinder is sufficient.

The pallet rotation mechanism 40 is configured to be rotatable in the coating area 70 so that the angle of the surface of the pallet 33 changes with respect to the axial direction of the slide of the coating gun 71 described later. For example, as shown in FIG. 3, the mechanism includes a motor 41 attached to the frame 21 below the side wall of the painting area 70 of the paint drying device 20, and a first rotating gear 42 attached to the shaft of the motor 41. The timing belt 43 attached to the first rotation gear 42, the second rotation gear 44 driven by the timing belt 43, and the second rotation gear 44 can be fitted when the pallet 33 is positioned in the painting area 70. The third rotation gear 45 is attached and rotates the pallet 33.
Thereby, when the pallet 33 is positioned in the painting area 70, the pallet rotating mechanism 40 can rotate the pallet 33 by the rotation of the motor 41.

The set area 50 is formed on the upper surface of the paint drying apparatus 20, and an upper surface slit 52 is formed so that the pallet 33 can come out of the upper surface from below. When the pallet 33 is positioned in the set area 50, the corner portion 3 of the weather strip 1 can be set. Further, an opening / closing lid 51 is attached to the side end of the set area 50 so as to be able to be opened and closed so as to close the upper surface slit 52.
The opening / closing lid 51 is configured to open upward when the pallet 33 is in the set area 50 and close when the pallet 33 enters the drying area 60.

  The drying area 60 is formed in a box shape on the lower surface of the set area 50. The upper surface of the drying area 60 communicates with the set area 50 through the upper surface slit 52 of the set area 50. A drying area bottom plate 64 that divides the lower surface of the drying area 60 from the coating area 70 is formed, and a drying area slit 65 is formed at the center of the drying area bottom plate 64 so that the pallet 33 can pass therethrough.

Side wall slits 63 are formed on both side surfaces of the drying area 60 and the painting area 70 so that the straight portion of the weather strip 1 can be moved up and down.
A hot air inflow duct 61 and a hot air exhaust duct 62 connected to a hot air generator (not shown) are attached to the rear wall of the drying area 60.

The coating area 70 is formed on the lower surface of the drying area 60, and a coating gun 71, which is a surface treatment agent application device for applying a surface treatment agent, is attached thereto. In addition to the coating gun 71, any coating agent that can apply a surface treatment agent can be used. The coating gun 71 is attached to the slide cylinder 72 so as to be slidable in the lateral direction. A paint exhaust duct 73 for discharging paint mist is attached to the rear wall of the paint area 70.
A painting area bottom wall 74 is provided on the lower surface of the painting area 70. The pallet column 32 of the pallet lifting mechanism 30 passes through the painting area bottom wall 74.

Next, the process of forming a surface treatment layer in the corner part 3 using the coating drying apparatus 20 is demonstrated.
After forming the corner portion 3 by connecting the end portions of the two straight portions 2 with the mold forming portion molding machine 10, the corner portion 3 is removed from the corner molding die 12 and placed on the pallet 33 of the coating drying apparatus 20. Set. At this time, the pallet 33 of the coating and drying apparatus 20 rises, passes through the upper surface slit 52, and is positioned in the set area 50. The pallet 33 is moved up and down by the cylinder 31.

  The weather strip 1 is set on the pallet 33 so that the corner portion 3 of the weather strip 1 is positioned near the center of the pallet 33. At this time, the weather strip 1 is fixed to the pallet 33 by the mounting jig. Thereafter, when the pallet 33 is lowered through the upper surface slit 52, the open / close lid 51 is closed, the upper surface slit 52 is closed, and hot air can be prevented from leaking from the drying area 60.

  Then, the pallet 33 descends, passes through the drying area 60 and stops at the painting area 70. Since the side wall slits 63 are continuously formed on the side walls of the drying area 60 and the coating area 70, the straight portion 2 of the weather strip 1 protruding from the pallet 33 can pass through the side wall slits 63, and the pallet 33 can move up and down smoothly.

A surface treatment agent is applied from the coating gun 71 to the corner portion 3 of the weather strip 1 located in the coating area 70.
The coating gun 71 is slid in the left-right direction by the slide cylinder 72. For this reason, a surface treating agent can be apply | coated over the whole range of the longitudinal direction of the corner part 3. FIG.
A painting exhaust duct 73 is provided in the painting area 70, and the painting mist in the painting area 70 is discharged from the painting exhaust duct 73.

  Further, when the pallet 33 is positioned in the painting area 70, the pallet 33 engages with the pallet rotating mechanism 40 provided on the side wall of the painting area 70, so that the pallet 33 places the corner portion 3 of the weather strip 1 thereon. While rotating, the angle of the surface of the pallet 33 changes with respect to the axial direction of the slide of the coating gun 71 in the coating area 70. For this reason, the corner portion 3 can be directed to the coating gun 71 at a wide range of angles not only in the longitudinal direction of the corner portion 3 but also in the width direction.

  The horizontal slide of the coating gun 71 in the coating area 70 and the rotation of the pallet 33 are automatically synchronized so that the surface treatment agent can be applied over the entire range of the corner portion 3. It is controlled. For this reason, while being able to apply | coat a surface treating agent with respect to the wide angle of the width direction of the corner part 3, a surface treatment layer can be formed in the predetermined surface of the corner part 3 together with the said slide. The predetermined surface is a surface that comes into contact when the corner portion 3 is attached to the door frame or the periphery of the opening of the vehicle body as another member.

  As described above, since the corner portion 3 can be coated with the surface treatment agent in the coating area 70 immediately after being molded by the molding unit molding machine 10, the surface treatment agent can be applied while the corner portion 3 remains at a high temperature after molding. Since it is applied, the surface treatment agent can strongly adhere to the base material of the corner portion 3. The surface treatment agent is not a solvent type but an aqueous type. Therefore, moisture can be vaporized and adhered more quickly when the corner portion 3 of the weather strip 1 is kept at a high temperature.

  The weather strip 1 including the corner portion 3 coated with the surface treatment agent in the painting area 70 is raised on the pallet 33 while being placed on the pallet 33, passes through the drying area slit 65, and is transferred to the drying area 60. Is done. When the pallet 33 is positioned in the drying area 60, the drying area slit 65 is formed by a closing plate (not shown) attached below the pallet 33 or a rubber closing plate (around the drying area slit 65). (Not shown) or the like.

The weather strip 1 located in the drying area 60 is supplied with heated air from the hot air inflow duct 61 to dry the surface treatment agent, and the surface treatment layer of the corner portion 3 is formed.
After drying, the pallet 33 rises and reaches the set area 50, and the weather strip 1 is removed from the pallet 33, and the formation of the weather strip 1 is completed.

When there are a plurality of corner portions 3, the painting process can be repeated each time the corner portions 3 are formed.
The raising and lowering and rotation of the pallet 33 and the application of the coating gun 71 are controlled so as to operate automatically. For this reason, the operator can automatically paint and heat cure the weather strip 1 simply by setting the corner portion 3 of the weather strip 1 on the pallet 33 and pressing the switch. Further, the weather strips 1 can be applied one by one, and the work in process can be reduced, which is efficient. Further, the coating and drying apparatus 20 can be made compact, and the weather strip 1 can be molded and the surface treatment layer can be formed at the same place.

DESCRIPTION OF SYMBOLS 1 Weather strip 3 Corner part 10 Molding part molding machine 20 Coating drying apparatus 30 Pallet raising / lowering mechanism 33 Pallet 40 Pallet rotation mechanism 50 Set area 60 Drying area 70 Coating area

Claims (5)

In a method for producing a weather strip having an extruded part formed by extrusion molding and a molded part formed by connecting the extruded part by molding,
The mold part is formed by a mold part molding machine that molds the mold part, and a coating drying device that forms a surface treatment layer by applying a surface treatment agent to the surface of the mold part,
The paint drying device is installed in the vicinity of the molding part molding machine,
The coating drying apparatus includes: a set area for setting the molding part on a pallet; a drying area for drying the surface treatment layer adjacent to the lower part of the set area; and the surface adjacent to the lower part of the drying area. A coating area for applying a treatment agent,
In the coating area, there is provided a surface treatment agent application device that can slide in the lateral direction and applies the surface treatment agent,
The pallet is provided so as to be slidable in the vertical direction so that the weather strip can be positioned in the set area, the drying area, and the painting area, and the surface treatment is performed in the painting area. Provided so that the angle of the surface of the pallet changes with respect to the axial direction of the slide of the agent coating device,
The weather strip is set on the pallet in the set area as soon as the molding part connecting the extrusion molding part is molded,
Thereafter, the pallet moves into the coating area, the surface treatment agent application device slides and slides in the lateral direction, the pallet rotates, and the surface treatment agent is applied to the mold forming part,
Further, the pallet is continuously moved into the drying area, and the surface treatment agent in the molding part is dried to form the surface treatment layer.   The method for producing a weather strip according to claim 1, wherein the movement of the pallet to the set area, the drying area, and the coating area is automatically operated.   The method of manufacturing a weather strip according to claim 1 or 2, wherein the lateral slide of the surface treatment agent coating apparatus and the rotation of the pallet in the coating area are synchronously controlled.   The method for producing a weather strip according to any one of claims 1 to 3, wherein the mold forming portion is a corner portion of the weather strip.   The mold forming part molding machine includes a mold for molding a mold part and a material injection device, and the paint drying device is installed adjacent to the mold. The method for producing a weather strip according to Item.

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