JP6457280B2 - Resin wind panel - Google Patents

Description

  The present invention relates to a resin window panel having a window panel body including a translucent resin panel and a concealing layer integrally formed on the back surface side of the resin panel along the outer peripheral edge of the resin panel. It is.

  Patent Document 1 discloses a resin-made window panel including a light-transmissive resin panel and a window panel main body formed of a concealing layer integrally formed along the outer peripheral edge of the resin panel on the back surface side of the resin panel. Is disclosed. In order to mold the window panel body of the resin window panel, first, a cavity mold that holds the resin panel from the front side, a molding surface that molds the back side of the concealing layer, and the back side of the resin panel are contacted. A molding die having a core die having an abutting surface to contact is prepared. The cavity mold and the core mold are clamped with the resin panel held by the cavity mold to form a cavity between the back surface of the resin panel and the core mold, and the resin is contained in the cavity. The concealing layer is integrally formed by injecting and filling a resin having a light transmittance lower than that of the panel from the back side, and the solidified resin remaining on the gate on the back side of the concealing layer to the cavity is cut off.

JP 2012-143890 A

  By the way, in the said patent document 1, at the time of injection filling of the resin in the said cavity, resin flows into between a shaping | molding die and a resin panel from the inner peripheral part and outer peripheral part of the said cavity, and the inner periphery of the concealment layer after shaping | molding Burr is greatly generated on the side and the outer peripheral side, and the appearance appearance near the periphery of the hiding layer may be deteriorated. In the said patent document 1, no countermeasure is taken against this problem.

  This invention is made | formed in view of this point, The place made into the objective is to improve the external appearance appearance of the periphery of a concealing layer by suppressing generation | occurrence | production of a burr | flash.

  In order to achieve the above object, the present invention is characterized in that a recess is formed between the peripheral edge of the concealing layer and the gate corresponding portion.

Specifically, according to the first invention, a translucent resin panel and a resin having a light transmittance lower than that of the resin panel are injected along the outer peripheral edge of the resin panel on the back side of the resin panel. The following solutions were taken for a resin wind panel having a wind panel body formed of a concealing layer integrally formed.

That is, according to the first aspect of the present invention, a gate mark is formed on the back surface side of the masking layer, and a concave strip extending in the circumferential direction on the front surface side or the back surface side of the masking layer has an inner peripheral side of the gate track and Formed on at least one of the outer peripheral sides , a circumferentially extending rib is integrally provided on the peripheral portion of the concave portion, and the side surface of the rib is continuous with the inner surface of the concave portion without a step . It is characterized by that .

According to a second aspect of the present invention, after the translucent resin panel is injection-molded, a resin having a light transmittance lower than that of the resin panel is injected on the back surface side of the resin panel along the outer peripheral edge of the resin panel. A molding method for obtaining a wind panel body by integrally molding a concealing layer, wherein a gate mark is formed on the back side of the concealing layer and extends in the circumferential direction on the front side or the back side of the concealing layer. A portion formed on at least one of the inner peripheral side and the outer peripheral side of the gate mark, and having a cavity mold having a molding surface for molding the surface and end surface of the resin panel, and a molding surface for molding the back surface of the resin panel. A first core mold and a second core mold having a molding surface for molding the back surface side of the concealing layer and having a gate formed on the molding surface are used. The second core mold or the resin panel Has a convex part for forming the concave line part. The cavity mold and the first core mold are clamped to form a first cavity, and the resin panel is molded by injection-filling a translucent resin into the first cavity. The cavity mold and the second core mold are clamped to form a second cavity between the resin panel held by the cavity mold and the second core mold, and the opaque resin is formed in the second cavity. The concealing layer is formed by injection filling.

  According to the first invention, in the process of injecting and filling the resin into the concealing layer forming cavity, the gate is formed by the movable part for forming the back side of the concealing layer or the convex part for forming the concave strip part formed on the resin panel. Since the flow of resin from the convex portion to the convex portion side is suppressed, the resin pressure is reduced on the side opposite to the convex portion, and the resin does not easily flow between the mold and the resin panel. Therefore, it is possible to suppress the occurrence of burrs at the periphery of the hiding layer to be molded, and improve the appearance of the appearance near the periphery of the hiding layer.

Further, since the movement of the resin solidified on the outer peripheral side of the convex portion to the inner peripheral side is restricted by the convex portion at the time of forming the concealing layer, the movement amount to the inner side of the outer peripheral edge of the concealing layer due to thermal contraction is small. Become. Therefore, deformation of the molded window panel body is suppressed, and variation in dimensions is reduced .

Also, since the concealing layer is reinforced by the ribs, it is possible to increase the rigidity of the resin window panel.

  In addition, since the side surface of the rib is continuous with the inner surface of the concave portion without a step, a liquid mass is hardly generated at the base end of the rib, and the rib can be prevented from becoming a source of traces of the flow of the hard coat agent. Further, it is possible to prevent the coating film from being peeled off at the liquid reservoir forming portion.

  In addition, in the process of injecting and filling the resin into the cavity for forming the concealing layer, the resin pressure is further reduced on the opposite gate side of the convex portion because the resin injected from the gate flows also to the rib corresponding portion in the cavity. The resin is more difficult to flow between the mold and the resin panel. Therefore, it can suppress more effectively that a burr | flash generate | occur | produces in the periphery of the masking layer shape | molded, and can improve the appearance appearance near the periphery of a masking layer more effectively.

It is a side view of the vehicle provided with the resin-made window panels which concern on Embodiment 1 of this invention. It is a perspective view of the resin-made window panel which concerns on Embodiment 1 of this invention. It is sectional drawing in the AA of FIG. (A) is a shaping | molding process figure which shows the process of injecting translucent resin in a 1st cavity, (b) is a shaping | molding which shows the process of rotating a cavity type | mold in the state which hold | maintained the resin panel in the cavity type | mold. (C) is a molding process diagram showing a state in which the step of injecting the opaque resin into the second cavity and the step of injecting the transparent resin into the first cavity are simultaneously performed. It is. It is the B section enlarged view of Drawing 4 (c). FIG. 6 is a diagram corresponding to FIG. 5 of the second embodiment. FIG. 4 is a diagram corresponding to FIG. 3 of the third embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 shows a vehicle 3. As shown in the figure, a substantially rectangular window opening 5 is formed at the rear side of the vehicle body side surface of the vehicle 3, and the opening 5 is made of a substantially rectangular resin according to the first embodiment of the present invention. The wind panel 1 is attached in a fitted state. As shown in FIGS. 2 and 3, the resin window panel 1 has a substantially rectangular annular reinforcing rib 7 extending over the entire circumferential direction, and is applied over the entire inner circumference of the reinforcing rib 7. It is fixed to the opening 5 by an adhesive (not shown).

  The resin window panel 1 includes a translucent substantially rectangular plate-shaped resin panel 9 having an annular peripheral wall portion 9a protruding toward the back surface at the periphery. On the back surface side of the resin panel 9, a substantially rectangular annular opaque opaque layer 11 is integrally formed along the entire outer peripheral edge of the resin panel 9 so as to contact the peripheral wall portion 9 a from the inside. . The thickness T1 of the resin panel is set to 2 to 5 mm, for example, and the thickness T2 of the concealing layer 11 is set to 2 to 5 mm, for example. On the inner peripheral side of the concealing layer 11, the resin panel 9 is exposed to form a substantially rectangular window portion 15 having translucency. The resin panel 9 and the concealing layer 11 constitute a window panel body 13.

  A gate mark 17 corresponding to a gate 105e described later is formed at a substantially central portion in the width direction on the back surface side of the concealing layer 11 so as to be spaced apart from each other in the circumferential direction. On the outer peripheral side of these gate marks 17, an annular concave portion 19 having a U-shaped cross section extending over the entire circumferential direction is formed on the back surface side of the concealing layer 11, and corresponds to the concave portion 19 of the concealing layer 11. The location constitutes the thin portion 21. The width W1 of the concave stripe portion 19 is set to 2 to 8 mm, for example, and the depth D is set to 1 to 4 mm, for example. An annular rib 23 extending in the whole circumferential direction is integrally provided on the inner peripheral edge of the concave strip portion 19, and the outer peripheral side surface of the annular rib 23 is continuous with the inner surface of the concave strip portion 19 without a step. ing. The width W2 of the annular rib 23 is set to 1 to 2 mm, for example, and the height H is set to 1 to 10 mm, for example.

  A coating film 25 is formed on the entire front and back surfaces of the window panel body 13 by applying a hard coating agent. The reinforcing rib 7 is constituted by the annular rib 23 of the concealing layer 11 and the coating film 25 applied to the annular rib 23.

  Next, based on FIG.4 and FIG.5, the two-color injection molding method of the said window panel main body 13 is demonstrated. For forming the window panel body 13, a forming die 100 including a cavity die (fixed die) 101, a first core die (movable die) 103, and a second core die (movable die) 105 is used. Before explaining a specific molding method, these mold structures will be explained.

  The cavity mold 101 has a molding surface 101a having the same shape extending in the vertical direction on both side surfaces. Each molding surface 101 a is for molding the surface and end surface of the resin panel 9. The cavity mold 101 is supported from above and below by a cavity rotating shaft 107 extending in the vertical direction, and is rotated by driving by a driving device (not shown).

  The first core mold 103 has a molding surface 103a for molding the back surface of the resin panel 9 and the inner surface of the peripheral wall portion 9a. A gate 103 b is formed at a location corresponding to the concealment layer 11 on the molding surface 103 a of the first core mold 103. The gate 103b is formed at one end of a runner 103c, the other end of the runner 103c communicates with one end of a sprue 103d, and the other end of the sprue 103d communicates with a nozzle 109 of an injection machine (not shown). .

  The second core mold 105 includes a contact surface 105a that contacts the back surface of the resin panel 9 inside the concealment layer 11, that is, the back surface of the window portion 15, and a contact surface 105a ′ that contacts the end surface of the peripheral wall portion 9a. It has the molding surface 105b which shape | molds the back surface side of the concealment layer 11. FIG. On the molding surface 105b, an annular convex portion 105c for forming the concave portion 19 of the concealing layer 11 and an annular concave portion 105d for forming the annular rib 23 are formed. Further, a plurality of gates 105e are formed at a substantially central portion in the width direction of the molding surface 105b with a space therebetween in the circumferential direction. Each gate 105e is formed at one end of the runner 105f, and the other end of the runner 105f is sprue 105g. The other end of the sprue 105g communicates with a nozzle 111 of an injection machine (not shown).

  Next, a two-color injection molding method for the window panel body 13 will be described. First, as shown in FIG. 4A, the cavity mold 101 and the first core mold 103 are clamped to form the first cavity C1, and the cavity mold 101 and the second core mold 105 are clamped. The molding process begins. And in this state, the resin panel 9 is shape | molded by injection-filling translucent resin R1 in the 1st cavity C1. At this time, the translucent resin R1 is injected from the nozzle 109 of the injection machine, and then injected from the gate 103b through the sprue 103d and the runner 103c. Note that PC (polycarbonate), PMMA (acrylic), or the like can be used as the translucent resin R1.

  Next, as shown in FIG. 4 (b), the first core mold 103 is retracted to open the cavity mold 101 and the first core mold 103, and at the same time, the second core mold 105 is retracted, The cavity mold 101 is rotated 180 degrees around the cavity rotation shaft 107 by a driving device (not shown).

  Next, as shown in FIG. 4C, the second core mold 105 is advanced to clamp the cavity mold 101 and the second core mold 105 so that the contact surface 105a of the second core mold 105 is formed into the cavity. The resin panel 9 held on the mold 101 is brought into contact with the back surface. Thereby, the second cavity C <b> 2 is formed between the inner side of the peripheral wall portion 9 a of the resin panel 9 and the second core mold 105. In this state, by injecting the opaque resin R2 from the nozzle 111 of the injection machine, the opaque resin R2 is injected and filled into the second cavity C2 from the gate 105e through the sprue 105g and the runner 105f. . In addition, as said opaque resin R2, PC (polycarbonate), PET (polyethylene terephthalate), PBT (polybutylene terephthalate), PC / ABS alloy (polycarbonate / acrylonitrile butadiene styrene), etc. can be used. Further, in this process, the first core mold 103 is advanced, the cavity mold 101 and the first core mold 103 are clamped to form the first cavity C1, and as described with reference to FIG. The resin panel 9 is molded by injection-filling the translucent resin R1 from the gate 103b into the first cavity C1.

As described above, the second core mold 105 is contracted by the contraction of the resin panel 9 in the process from the time when the cavity mold 101 and the second core mold 105 are clamped until the filling of the opaque resin R2 is completed. A small gap (not shown) between the contact surface 105a ′ of the resin panel 9 and the end surface of the peripheral wall portion 9a of the resin panel 9, and between the molding surface 101a of the cavity mold 101 and the outer peripheral end surface of the resin panel 9. Occurs. In this process, the annular convex portion 105c of the second core mold 105 suppresses the flow of the opaque resin R2 from the gate 105e to the outer peripheral side. Lower. Further, since the opaque resin R2 injected from the gate 105e also flows into the annular recess 105d, the resin pressure is further reduced at the outer peripheral edge portion of the second cavity C2. Therefore, between the contact surface 105a ′ of the second core mold 105 and the end surface of the peripheral wall portion 9a of the resin panel 9, and between the molding surface 101a of the cavity mold 101 and the outer peripheral end surface of the resin panel 9. The opaque resin R2 is less likely to flow from the outer peripheral edge portion of the second cavity C2, the generation of burrs on the outer peripheral side of the masking layer 11 to be molded is suppressed, and the appearance near the outer peripheral edge of the masking layer 11 is improved. Will improve.

  Then, the light-transmissive resin R2 is hardened on the second core mold 105 side, and the wind panel body 13 in which the light-transmissive concealment layer 11 is integrally formed on the back surface side of the resin panel 9 along the peripheral wall portion 9a. Molded. At this time, since the movement of the opaque resin R2 solidified on the outer peripheral side of the annular convex portion 105c to the inner peripheral side is restricted by the annular convex portion 105c, the inner side of the outer peripheral edge of the concealing layer 11 due to thermal contraction. Less travel. Therefore, deformation of the molded wind panel body 13 is suppressed, and variation in dimensions is reduced. Thereafter, the second core mold 105 is retracted to open the cavity mold 101 and the second core mold 105, and remains on the gate 105e of the second core mold 105 to solidify and adhere to the concealing layer 11. The window panel body 13 is obtained by cutting off the remaining solidified material (not shown). A gate mark 17 is formed on the back surface of the concealing layer 11 of the obtained wind panel body 13. On the other hand, on the first core mold 103 side, the first core mold 103 is moved backward to open the cavity mold 101 and the first core mold 103.

  By repeating the above-described steps, the wind panel body 13 can be continuously formed on both side surfaces of the cavity mold 101.

  Next, a liquid hard coat agent is applied by flow coating on the back surface (surface on the concealment layer 11 side) of the wind panel body 13 formed as described above, and dried on the back surface of the wind panel body 13. A coating film 25 is formed. At this time, since the groove portion 19 is formed in a U-shaped cross section and no corner portion is formed in the groove portion 19, a liquid mass of the hard code agent is generated by surface tension in the groove portion 19. Is prevented. Further, since the side surface of the annular rib 23 is continuous with the inner surface of the concave portion 19 without a step, a liquid mass is hardly generated at the base end of the annular rib 23. Therefore, the liquid mass of the hard code agent is prevented from flowing down to the window portion 15 of the resin panel 9 to form a trace of inflow, and the coating film 25 is prevented from being peeled off at the liquid mass formation site. Then, the coating film 25 is formed in the same way as the back surface side on the surface (surface by the side of the concealment layer 11) of the window panel main body 13. FIG. In addition, as a hard coat agent, a silicone type, an acrylic type, a silazane type, or the like can be used. Moreover, you may perform formation of this coating film 25 from the surface side.

  Therefore, according to the first embodiment, the concave stripe portion 19 is formed on the back surface side of the concealing layer 11, and the convex portion for forming the concave stripe portion 19 does not need to be formed on the resin panel 9. It is possible to prevent occurrence of sink marks on the surface of the resin panel 9.

  Moreover, since the concealing layer 11 is reinforced by the annular rib 23, the rigidity of the resin window panel 1 can be increased.

(Embodiment 2)
FIG. 6 is a diagram corresponding to FIG. 5 of the second embodiment of the present invention. In the second embodiment, the concave strip portion 19 is also formed on the inner peripheral side of the gate mark 17. Since the other configuration is the same as that of the first embodiment, the same components are denoted by the same reference numerals, and detailed description thereof is omitted.

Therefore, according to the second embodiment, the flow of the opaque resin R2 from the gate 105e to the inner peripheral side is suppressed by the annular convex portion 105c on the inner peripheral side of the second core mold 105 when the concealing layer 11 is formed. Therefore, the resin pressure at the inner peripheral edge of the second cavity C2 is lowered. Therefore, the opaque resin R2 is less likely to flow from the inner peripheral edge portion of the second cavity C2 between the contact surface 105a of the second core mold 105 and the surface of the window portion 15 of the resin panel 9. The occurrence of burrs on the inner peripheral side of the masking layer 11 is suppressed, and the appearance appearance of the masking layer 11 near the inner periphery is improved.

(Embodiment 3)
FIG. 7 is a view corresponding to FIG. 3 of the third embodiment of the present invention. In the third embodiment, the concave strip portion 19 is formed on the surface side of the masking layer 11. Since the other configuration is the same as that of the first embodiment, the same components are denoted by the same reference numerals, and detailed description thereof is omitted.

  In addition, in the said Embodiment 2, although the groove part 19 was formed in both the inner peripheral side and outer peripheral side of the gate trace 17, you may form only in an inner peripheral side.

  Further, in the third embodiment, the concave strip portion 19 is formed only on the outer peripheral side of the gate mark 17, but may be formed on both the inner peripheral side and the outer peripheral side, or only on the inner peripheral side. Good.

  Moreover, in the said Embodiment 1-3, although the cyclic | annular rib 23 was formed in the inner peripheral part of the groove part 19, you may form in an outer peripheral part.

  In the first to third embodiments, the annular rib 23 is formed over the entire circumferential direction in the concealing layer 11. Instead of the annular rib 23, a plurality of ribs extending in the circumferential direction are formed at intervals. May be. In such a case, it is preferable to set the part where the rib is not formed at a part away from the gate 105e (gate trace 17), for example, an intermediate point between the two gates 105e.

  In Embodiments 1 to 3, the hard coat agent is applied by flow coating, but may be applied by other methods such as dip coating or spray coating.

  In the first to third embodiments, the concealing layer 11 is made of the opaque resin R2. However, the translucent resin or the like, such as a translucent resin, has a light transmittance lower than that of the transparent resin R1 constituting the resin panel 9. You may comprise by the resin of.

  In the first to third embodiments, the present invention is applied to the resin window panel 1 attached to the window opening 5 formed at the rear side of the vehicle 3, but the present invention is not limited thereto, and the vehicle 3 It can also be applied to the front and rear wind panels and the wind panels attached to the roof.

  The present invention relates to a translucent resin panel and a concealment formed integrally along the outer peripheral edge of the resin panel by injecting a resin having a light transmittance lower than that of the resin panel to the back side of the resin panel. It is useful as a resin wind panel having a wind panel body composed of layers.

1 Resin wind panel
R1 translucent resin R2 translucent resin
9 Resin panel
11 Concealment layer
13 Wind panel body
15 windows
17 Gate trace
19 Concave section
23 annular Li Breakfast
101 cavity type
101a molding surface
103 1st core type
103a molding surface
105 2nd core type
105b molding surface
105c annular projection
105e gate
C1 first cavity
C2 second cavity

Claims (2)

By injecting a resin (R2) having a light transmittance lower than that of the resin panel (9) on the back side of the resin panel (9) and the resin panel (9), the resin panel (9) A resin window panel including a window panel body (13) formed of a concealing layer (11) integrally formed along an outer peripheral edge,
On the back side of the concealing layer (11), a gate mark (17) is formed,
A concave strip (19) extending in the circumferential direction on the front or back side of the concealing layer (11) is formed on at least one of the inner peripheral side and the outer peripheral side of the gate mark (17) ,
A rib (23) extending in the circumferential direction is integrally projected on the peripheral edge of the concave strip (19), and the side surface of the rib (23) is continuous with the inner surface of the concave strip (19) without a step. resin window panel, characterized in that it is. After injection molding the translucent resin panel (9), the resin panel (9) is injected with a resin (R2) having a light transmittance lower than that of the resin panel (9) on the back side of the resin panel (9). A molding method for obtaining a wind panel body (13) by integrally molding the concealment layer (11) along the outer peripheral edge of (9),
On the back side of the concealing layer (11), a gate mark (17) is formed,
A concave strip (19) extending in the circumferential direction on the front or back side of the concealing layer (11) is formed on at least one of the inner peripheral side and the outer peripheral side of the gate mark (17),
A cavity mold (101) having a molding surface (101a) for molding the surface and end face of the resin panel (9), and a first core mold (103a) having a molding surface (103a) for molding the back surface of the resin panel (9). 103) and a second core mold (105) having a molding surface (105b) for molding the back side of the concealing layer (11) and having a gate (105e) formed on the molding surface (105b). The second core mold (105) or the resin panel (9) is provided with a concave portion (19) and a convex portion (105c) for molding,
The cavity mold (101) and the first core mold (103) are clamped to form a first cavity (C1), and a transparent resin (R1) is injected and filled into the first cavity (C1). By molding the resin panel (9),
Thereafter, the cavity mold (101) and the second core mold (105) are clamped between the resin panel (9) and the second core mold (105) held by the cavity mold (101). A window panel characterized in that a second cavity (C2) is formed and the opaque layer (11) is formed by injection-filling an opaque resin (R2) into the second cavity (C2). Molding method of the main body.

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