JP6647886B2 - Mold - Google Patents

Description

The present invention relates to forming shape type.

  Conventionally, as shown in FIG. 10 and FIG. 11 showing the EE section and the FF section thereof, in a roof R of a vehicle, a roof molding mounting groove R3 formed at a joint between a center panel R1 and a side panel R2 of the roof. A roof molding 80 is attached to the vehicle, and a joint between the center panel R1 and the side panel R2 is hidden (Patent Documents 1 and 2). FIG. 12 is a perspective view of the roof molding 80, a GG section, an HH section, and a JJ section.

  The roof molding 80 has a head 83 and a leg 84 extending downward from the lower surface (back surface) of the head 83. The leg 84 is inserted into the roof molding mounting groove R3 and The portion 83 covers the roof molding mounting groove R3. In the roof molding 80, a terminal 88 is formed at an end 82 of a molding body 81 in which an extruded body in which the head 83 and the leg 84 are integrally formed is cut to a predetermined length.

  The head 83 has a width capable of covering the roof molding mounting groove R3. The leg portion 84 is formed on the lower surface of the head portion 83 so as to be narrower than the head portion 83. At the lower portion of the leg portion 84, there are provided lips 85, 85 formed so as to project outward, and a metal core 86 is embedded in the leg portion 84 in order to mainly suppress expansion and contraction due to a temperature change. Have been. The lips 85, 85 are made of an elastic resin, and when the leg portions 84 and the lips 85, 85 are inserted into the roof molding mounting groove R3, as shown in the FF cross-sectional view of FIG. The leading ends of the lips 85, 85 are pressed against the side surfaces in the roof molding mounting groove R <b> 3 to suppress the rising of the roof molding 80.

  The terminal portion 88 is formed by injection molding at the end portion 82 of the molding main body 81 for the purpose of improving the terminal appearance of the roof molding 80 and the like. The end portion 82 of the molding main body 81 where the terminal portion 88 is formed, the lower portion of the leg portion 84 is removed leaving a part, and the terminal portion 88 is injection-molded including the portion of the removal mark. I have. In the terminal portion 88, a portion formed below the leg portion 84a left by the removal protrudes in the width direction of the roof molding 80 to form a locking portion 89 for fixing to the vehicle.

  As shown in the cross-sectional view taken along the line EE in FIG. , 92, the end of the roof molding 80 is fixed.

  To manufacture the roof molding 80, the end 82 of the molding main body 81 from which the lower side of the leg portion 84 is removed is set in the terminal molding cavity of the molding die, and in that state, the terminal resin is placed in the terminal molding cavity. To form the terminal portion into the end 82 of the molding body 81 by injection molding.

  When injecting the terminal resin into the terminal molding cavity, the injection pressure of the resin is applied to the end 82 of the molding main body 81, and the molding main body 81 retreats, and there is a possibility that the molding of the terminal portion 88 may be defective. Therefore, as shown in FIG. 13, a shift prevention projection 103 is erected on the molding body mounting surface 102 of the lower mold 101 on which the molding body 81 is mounted, and the deviation prevention projection 103 is attached to the leg portion of the molding body 81. The molding main body 81 has been fixed by being cut into the lower surface of the molding 84 (Patent Document 2). Reference numeral 104 denotes a terminal portion forming cavity, and reference numeral 105 denotes an upper mold. The lower mold 101 and the upper mold 105 constitute a molding die.

  However, in the injection molding of the terminal portion 88, since the fixing locking portion 89 is formed below the leg portion 84a left by the removal, the fixing locking portion 89 is formed in the lower mold 101. The protrusion 103 for preventing slippage could not be erected in the area where the displacement occurred. As a result, the distance from the tip end 82a of the molding body end portion 82 that receives the injection pressure to the displacement prevention protrusion 103 becomes large, and the planned forming portion of the fixing locking portion 89 is not fixed by the displacement prevention protrusion 103. During the injection molding of the terminal portion 88, the end portion 82 of the molding body 81 is deformed by the injection pressure, so that the quality of the terminal portion 88 varies, and the quality of the fixing locking portion 89 also tends to vary.

JP 2009-154555 A JP-A-8-11156

The present invention has been made in view of the above points, and an object of the present invention is to provide a molding die used in a method of manufacturing a roof molding having less variation in quality of a terminal portion.

The invention according to claim 1, wherein the leg at the end of the molding body having a head and a leg extending from the back surface of the head is removed leaving a part on the head side, The end of the molding body where a part of the part was left was set in the terminal molding cavity of the molding die, and the resin was injected into the terminal molding cavity to remove the tip of the end and the leg. when you injection molding the terminal portion in a portion, the both side surfaces of the leg portions left on the end of the molding body, the sandwich a slide core provided in the mold, the clamping face of the slide core a projection provided in the mold used in the production method of the roof molding of Ru was bite into the side surface of the left leg, and the lower mold that end of the molding body is placed, in the lower mold It is arranged on both sides of the remaining leg at the end of the molding body and It comprises a slide core that can be moved closer and farther, and an upper mold that covers the lower mold and the slide core, wherein the lower mold has a lower mold side terminal portion molding cavity adjacent to an end of the molding body, The slide core has a clamping surface that sandwiches the side surface of the leg left at the end of the molding body when approaching each other, and a leg lower side that communicates with the lower mold side terminal molding cavity below the clamping surface. With a terminal molding cavity, the clamping surface includes a projection that bites into the side surface when the side surface of the remaining leg is sandwiched, and the upper mold covers the lower mold and the slide core. An upper mold end molding cavity communicating with the lower mold end molding cavity, wherein the lower mold end molding cavity, the leg lower end molding cavity, and the upper mold end molding cavity are provided. And characterized in that it constitutes a more said terminal portion molding cavity.

  According to a second aspect of the present invention, in the first aspect, the terminal portion has a locking portion for fixing to a roof molding mounting groove of a vehicle at a portion formed at the removed portion of the leg portion. .

According to the invention of claim 1, when injecting the resin into the terminal portion molding cavity, both side surfaces of the leg portion left at the end of the molding body are sandwiched by the slide cores provided in the molding die, In order to fix the molding body by making the protrusion provided on the holding surface of the slide core bite into the side surface of the remaining leg, securely fix the end of the molding body near the tip end of the molding body The molding of the terminal portion is not hindered by the portion where the leg portion is removed below the remaining leg portion, so that a roof molding having good quality of the terminal portion can be easily manufactured. .
According to the second aspect of the invention, it is possible to form the locking portion for fixing to the roof molding mounting groove of the vehicle with good quality, and it is possible to manufacture a roof molding that is well fixed to the roof molding mounting groove.

It is a perspective view of the roof molding of one embodiment manufactured by the manufacturing method of the present invention. It is CC sectional drawing of FIG. It is sectional drawing of each position of FIG. It is sectional drawing which shows before and after the removal of the leg part of the edge part of an extrusion molding. It is sectional drawing of the state which set the edge part of the molding main body in the molding die. It is sectional drawing of the DD position of FIG. It is sectional drawing of a molding die. FIG. 3 is a plan view of a lower mold and a slide core of a molding die. It is a perspective view of the slide core of a shaping | molding die. FIG. 2 is a perspective view showing a part of an automobile to which a roof molding is attached. It is sectional drawing of each position of FIG. It is the perspective view of the roof molding of FIG. 10, and sectional drawing of each position. It is sectional drawing of the shaping | molding die which shows the time of manufacture of the conventional roof molding.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The roof molding 10 shown in FIGS. 1 to 3 is manufactured by the manufacturing method of the present invention, and is mounted in the roof molding mounting groove R3 as shown in FIG. 10 to close the roof molding mounting groove R3. is there. The roof molding 10 has a molding main body 11 and a terminal portion 18 formed by injection molding at an end 13 in the length direction L of the molding main body 11. The "end 13" in the molding body 11 includes a range of a predetermined distance from the end 13a of the end 13 in the longitudinal direction L, that is, means near the end. W in FIG. 1 is the width direction of the roof molding 10.

  The molding body 11 is made of an appropriate resin such as an olefin resin, and is formed by cutting an extruded body having a head portion 12 and a leg portion 14 formed on the lower surface (back surface) of the head portion 12 into a predetermined length. The lower part of the leg 14 at the cut end 13 is removed in a predetermined range.

  The head 12 has a width capable of closing the roof mounting groove R3, and conceals the inside of the roof molding mounting groove R3 when the roof molding 10 is mounted in the roof molding mounting groove R3.

  The leg portion 14 has a width smaller than the width of the head portion 12 and can be inserted into the roof molding mounting groove R3, and is provided along the length direction of the molding body 11. In the illustrated example, the legs 14 are provided on the lower surface of the head 12 at the center of the head 12 in the width direction. Lips 17 are formed on both sides of the lower portion of the leg portion 14 so as to protrude. The lips 17, 17 are made of a resin having a higher elasticity than the head 12 and the legs 14 (excluding the lips 17, 17), and when the lips 17, 17 are inserted into the roof molding mounting groove R3. Of the roof molding is pressed against the side surface in the roof molding mounting groove R3 to prevent the roof molding 10 from rising.

  A core material 16 is embedded in the leg portion 14 to mainly suppress expansion and contraction due to a temperature change. The core 16 is made of a wire or band (foil, plate) metal such as iron.

  At the end portion 13 of the molding main body 11, the leg portion 14 is removed by cutting or the like together with the lips 17, 17, leaving a predetermined amount of the head portion 12 side. The range (length, height, etc.) from which the legs 14 are removed is set according to the roof molding mounting groove R3 of the vehicle and the clip 92 in the mounting groove R3. With respect to the core 16 buried in the leg 14, if the core 16 is present in a portion to be removed by the leg 14, the core 16 is also removed. In the illustrated example, the leg portion 14 is almost removed on the tip 13a side of the end portion 13 of the molding main body 11, and in the subsequent portion, the leg portion 14 is removed in a stepwise manner except for the position including the core material 16. The joining area between the terminal portion 18 and the removal mark portion, which is injection-molded at the tip 13a of the end portion 13 and the removal mark, is increased, and the joining strength is increased. Reference numeral 14a denotes a leg portion left at the end portion 13 by removal.

  The terminal portion 18 is formed by injection molding in a predetermined range of the removal mark of the end portion 13 and the leg portion 14 of the end portion 13 of the molding body 11, and a terminal cap portion formed on the tip end 13 a of the end portion 13. The terminal cap portion 18a and the leg lower terminal portion 18b are continuously formed.

  The terminal cap portion 18a is mainly provided to conceal the cut surface of the tip 13a of the end portion 13 of the molding main body 11 to improve the appearance.

  The leg lower terminal portion 18b includes a fixing locking portion 18b1 for fixing the end of the roof molding 10 to the roof molding mounting groove R3 of the vehicle, and a remaining portion 18b2 of the leg lower terminal portion. . The fixing locking portion 18b1 has a locking claw shape protruding to both sides in the width direction of the roof molding 10, and can be locked to the clip 92 in the roof molding mounting groove R3. Positioning projections 19, 19 are formed on both sides of the leg lower terminal portion 18b. The positioning slits (not shown) provided on the locking claw pieces 92, 92 of the clip 92 are formed. It is configured to fit. On the other hand, the remaining portion 18b2 of the leg lower terminal portion is located on the opposite side of the terminal cap portion 18a in the fixing locking portion 18b1, and is locked to the locking claw pieces 92, 92 of the clip 92. Does not have locking pawls. The remaining portion 18b2 of the leg lower terminal is not essential and may not be provided.

  A predetermined number of vertical streak-like bite marks 16 are formed on both side surfaces 15, 15 of the leg portion 14a left at the end portion 13 of the molding body 11 by the removal. The bite marks 16 are marks that the protrusions 55 of the slide cores 51 cut into during the injection molding of the terminal portion 18 described later.

  A method for manufacturing the roof molding 10 will be described. First, an extruded body having the head 12 and the legs 14 (including the lips 17 and 17) is cut to form a molding body 11M having a predetermined length shown in 4-1 of FIG. Next, a predetermined length of the leg portion 14 in the end portion 13 of the molding main body 11M is removed by cutting or the like while leaving a part of the leg portion 14 on the head 12 side, and as shown in 4-2 in FIG. After the legs are removed, the molding body 11 is created. Reference numeral 14a is a leg portion left by the removal.

  Next, the end portion 13 of the molding main body 11 is set in a molding die 40 as shown in FIGS. The configuration of the molding die 40 will be described with reference to FIGS.

The molding die 40 includes a lower die 41, a slide core 51, and an upper die 71.
As shown in FIGS. 7 and 8, the lower die 41 has a molding body mounting groove 42, slide core recesses 45, 45, and a lower die end molding cavity 47.

  The molding body mounting groove 42 is a groove for mounting the end portion 13 of the molding body 11 and a portion of a predetermined length continuing from the end portion 13, the lower portion of the head 13 and the remaining leg portions. 14a and a leg 14 having a predetermined length are formed so as to be insertable. On the bottom surface 42a of the molding main body mounting groove 42, a positioning step portion 42b is formed which comes into contact with the tip of the leg portion 14 of the molding main body 11 that has not been removed. The molding main body mounting groove 42 may be any shape as long as at least the end 13 of the molding main body 11 can be mounted.

  When the end 13 of the molding body 11 is placed in the molding body mounting groove 42, the recesses 45 for the slide core are formed on both sides of the leg 14 a left on the end 13 of the molding body 11. Are formed in a direction orthogonal to the molding body mounting groove 42. The slide cores 51, 51 are slidably disposed in the slide core recesses 45, 45 so that the slide cores 51, 51 can approach and move away from each other.

  The lower mold side terminal portion forming cavity 47 is a cavity that forms a lower side of the terminal cap portion 18a in the terminal portion 18 of the roof molding 10. The lower mold side terminal portion forming cavity 47 has a lower portion communicating with leg lower side terminal portion forming cavities 54, 54 of the slide cores 51, 51 described later, and an upper portion mounted on the upper surfaces of the slide cores 51, 51. Adjacent to the tip 13a of the end 13 of the main body, it communicates with an upper die side molding cavity 73 of an upper die 71 described later. Reference numeral 49 denotes a gate, and reference numeral 50 denotes a runner. In the present embodiment, a remaining portion 47a of the lower die side molding cavity is formed between the slide cores 51, 51 and the positioning step 42b. The remaining portion 47a of the lower mold side terminal portion forming cavity is a cavity forming the remaining portion 18b2 of the leg lower terminal portion in the terminal portion 18 of the roof molding 10, and is provided below the leg portions of the slide cores 51, 51 described later. It communicates with the side end molding cavities 54, 54.

  As shown in FIG. 9, the slide cores 51 have head mounting recesses 52, 52 on the upper surface of which the lower side of the head 12 at the end 13 of the molding body 11 is mounted.

  The opposing surfaces 51a, 51a of the slide cores 51, 51 have clamping surfaces 53, 53 at the upper part. The sandwiching surfaces 53, 53 sandwich (clamp) the side surfaces 15, 15 of the legs 14a, 14a left by the removal at the end portion 13 of the molding body 11 by the approach of the slide cores 51, 51. It is. The holding surfaces 53, 53 are formed with protrusions 55, 55 that bite into the side surfaces 14b, 14b when the side surfaces 14b, 14b of the leg portions 14a, 14a left by the removal are held.

  In addition, on the opposing surfaces 51a of the slide cores 51, 51, the leg lower terminal forming cavities 54, 54 are provided below the holding surfaces 53, 53 in the longitudinal direction of the molding body 11. It has a groove shape along. The leg lower terminal molding cavities 54, 54 are cavities for fixing locking portions 18b1 in the leg lower terminal 18b formed in the removal trace of the leg 14. When the leg lower side terminal molding cavities 54, 54 bring the slide cores 51, 51 closer to each other, and clamp the remaining legs 14a, 14a with the clamping surfaces 53, 53, the lower mold is formed. It communicates with the side end portion forming cavity 47 and the remaining portion 47a of the lower mold side end portion forming cavity.

  The upper die 71 has a head portion of the molding main body 11 at an inner surface (lower surface) opposite to the molding main body mounting groove 42 of the lower die 41 and the head mounting concave portions 52, 52 of the slide cores 51, 51. A molding body upper side arrangement groove 72 into which the upper side of the mold body 12 fits, and an upper mold side terminal portion forming cavity adjacent to the tip (inner end) of the molding body upper side arrangement groove 42 and extended from the molding body upper side arrangement groove 72. 73. The upper mold side terminal portion forming cavity 73 is a cavity that forms the upper side of the terminal cap portion 18 a in the terminal portion 18 of the roof molding 10, and communicates with the lower mold side terminal portion forming cavity 47.

  The setting of the end portion 13 of the molding body 11 in the molding die 40 is performed, first, in a state where the slide cores 51 and 51 are separated from each other, the end portion 13 of the molding body 11 is inserted into the molding body mounting groove 42 of the lower mold 41. A predetermined range including 13 is placed and positioned. Next, the slide cores 51, 51 are brought closer to each other by a cylinder device or the like, and both side surfaces 15a of the remaining leg portion 14a at the end portion 13 of the molding body 11 are held by the holding surfaces 53, 53 of the slide cores 51, 51. , 15 and the projections 55, 55 of the holding surfaces 53, 53 are cut into the both side surfaces 15, 15. Thereby, the end 13 of the molding main body 11 can be securely fixed at a position close to the tip 13 a of the end 13. Next, the upper die 41 is put on the lower die 41 and the slide core 51 and closed. Due to the closed mold, the lower mold end molding cavity 47, the leg lower end molding cavity 54, the lower terminal remainder molding cavity 47a, and the upper mold end molding cavity 73 are connected in series. To form a terminal molding cavity 75 (shown in FIG. 5).

  Next, the terminal molding cavity 75 (the lower molding terminal molding cavity 47, the leg lower molding terminal 54, 54, the lower molding terminal remaining molding cavity 47a, the upper molding terminal molding cavity 47) of the molding die 40. At 73), the terminal resin is injected to form the terminal portion 18 below the end 13a of the end portion 13 of the molding body and the lower leg portion 14a. At that time, since the end 13 of the molding body 11 is fixed at the position near the tip 13a of the end 13 by the protrusions 55 of the slide cores 51, the end 13 is not easily deformed by the injection pressure of the resin. The terminal portion 18 can be formed correctly. Thereafter, the molding die 40 is opened, the slide cores 51 and 51 are separated, and the roof molding 10 having the terminal portion 18 formed at the end 13 of the molding main body 11 is taken out.

  As described above, according to the present invention, it is possible to manufacture a roof molding having a good quality of the terminal portion without hindering the molding of the terminal portion below the leg.

DESCRIPTION OF SYMBOLS 10 Roof molding 12 Head 13 End part 14 Leg part 14a Leg part left by removal 18 Terminal part 18a Terminal cap part 18b Leg lower terminal part 40 Mold 40 Lower die 47 Lower die side terminal molding cavity 47a Lower die Remaining portion of side terminal molding cavity 51 Slide core 53 Clamping surface 54 Leg lower terminal molding cavity 55 Projection 71 Upper die 73 Upper die side terminal molding cavity 75 Terminal molding cavity

Claims (2)

Removing the leg part of the end of the molding body having a head part and a leg part extended from the back surface of the head part leaving a part on the head side,
The end of the molding body where a part of the leg is left is set in a terminal molding cavity of a molding die, and a resin is injected into the terminal molding cavity to remove the tip of the end and the leg. when you injection molding the terminal portion to portion, the both side surfaces of the leg portions left on the end of the molding body, and held between the slide core is provided in the mold, clamping of the slide core a projection provided on a surface, the mold used in the method of manufacturing a roof molding that Ru was bite into the side surface of the left leg,
A lower mold on which the end of the molding body is placed, and a slide core which is arranged on both sides of the remaining leg of the end of the molding body in the lower mold and which can approach and move away from each other; Consisting of a lower mold and an upper mold that covers the slide core,
The lower mold has a lower mold side terminal portion molding cavity adjacent to an end of the molding body,
The slide core has a clamping surface that sandwiches the side surface of the leg left at the end of the molding body when approaching each other, and a leg lower side that communicates with the lower mold end molding cavity below the clamping surface. With a terminal portion forming cavity, the clamping surface includes a projection that bites into the side surface when the side surface of the remaining leg is sandwiched,
The upper mold includes an upper mold end molding cavity that communicates with the lower mold end molding cavity when covered with the lower mold and the slide core,
A molding die, wherein the lower mold side terminal portion forming cavity, the leg portion lower terminal portion forming cavity, and the upper mold side terminal portion forming cavity constitute the terminal portion forming cavity. The molding die according to claim 1, wherein a portion formed in the removed portion of the leg portion of the terminal portion has a locking portion for fixing to a mounting groove for a roof molding of a vehicle.

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