JP3910494B2 - Weatherstrip manufacturing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a method of manufacturing a weather strip that is attached to the periphery of a vehicle body opening that is opened and closed by a vehicle door, and more particularly, each seal that is attached to a lateral side and a lower side of the vehicle body opening of the weather strip. The present invention relates to a method of manufacturing a corner connecting portion that connects each terminal of a member.
[0002]
[Prior art]
  For example, as one of the weather strips, as shown in FIGS. 1 and 2, in a one-box car having a slide door 41, a substantially rectangular frame shape (SquareAn annular opening seal S is attached, and when the door is closed, the space between the inner panel (not shown) of the slide door 41 and the outer panel 43 of the vehicle body is sealed, and external water and dust enter the vehicle. Is preventing. In FIG. 1, reference numeral 44 denotes a door opening on the front side of the one-box car.
[0003]
  The opening seal S is attached to the lower side, the rear side, the front side, and the upper side of the peripheral edge of the door opening 42, respectively.₁, S₂, S_Three, S_FourEach of the four sealing members S, which are extruded from each other and continuous with each other.₁, S₂, S_Three, S_FourEach terminal of the corner connection portion N is molded (typically, injection molding using an injection mold).₁, N₂, N_Three, N_FourConnected to each other, the whole is abbreviatedSquareFrame shape (SquareAnnular). On the other hand, as shown in FIG.,carA trim portion (attachment portion) 1 attached to the periphery of the door opening 42 of the body, and a hollow seal portion 2 having a tubular shape that projects from the trim portion 1 to the vehicle exterior side and seals between the door body in the attached state. It consists of two parts.
[0004]
  Further, each corner connecting portion N₁, N₂, N_Three, N_FourAs one of the molding methods, there is a method using a core mold, and each of the two continuous seal portions (for example, the lower and rear lateral seal members S).₁, S₂) Are inserted into both ends of the core mold, and this connection portion is set in a corner mold F to be described later, and injection molding is performed.₁(Lower and front side seal members S₁, S_ThreeCorner connection N₂There is a manufacturing method in which the core mold is taken out from a core mold extraction hole formed in the center of the corner connecting portion.
[0005]
  And in order to prevent that a water droplet stays in the hollow seal part 2 which comprises the said opening seal S, the lower side seal member S attached to the lower periphery of the door opening part 42 is provided.₁Water drainage holes may be formed. Conventionally, in order to form this drain hole, each corner connecting portion N is₁, N₂, N_Three, N_FourAfter molding, the lower seal member S₁It was formed by drilling with a drill or the like on the lower side of the plate. For this reason, the man-hour for making a water drain hole takes extra, and there also existed a possibility of damaging a hollow seal part at the time of drilling.
[0006]
[Problems to be solved by the invention]
  The subject of this invention is forming a drain hole in a hollow seal part simultaneously with shaping | molding of a corner connection part, and reducing the shaping | molding man-hour as the whole weather strip.
[0007]
[Means for Solving the Problems]
  The invention of claim 1 for solving the above-mentioned problems isA long lateral seal member and a lower seal member, which are continuously attached along the lateral and lower opening portions through the lower corner portion of the door opening portion of the vehicle body, form a trim portion and a hollow seal portion. Each of the seal members has a hollow seal portion with the lower corner portion at the lower corner portion.Hollow corner connection formed by corner moldsoConnectionWasA weatherstrip manufacturing method comprising:Can be opened and closed vertically, when closedUpper and lower molds that define the outer peripheral surface shape of the corner connecting portion,Arranged at a position to form the corner connection,Determine the shape of the inner peripheral surface of the corner connecting portionThe rod-shaped main body part and a part of the main body part project toward the outside of the corner connecting part, and are sandwiched between the upper and lower molds when the upper and lower molds are closed, and are fixed between the upper and lower molds. A plurality of core-type divided bodies integrally having a protruding base; andMultiple core divisionsBelowCore-type divided body disposed on the side seal member sideUsing a corner mold having a water drain hole mold that can be moved forward and backward,Side of the lower seal memberThe core-type divided body disposed on the side includes a protruding base portion on the side seal member side of the rod-shaped elongated main body portion, and the other end on the lower seal member side of the main body portion is provided with the drain hole mold. A fitting recess into which the tip of the drain hole forming mold fits when advanced, closes the upper and lower molds, fixes the projecting bases of the plurality of core mold divisions, and fixes the The water drain hole mold is advanced, and the tip of the water drain hole mold is fitted into the fitting recess of the core mold divided body disposed on the lower seal member side.The upper and lower molds and the core mold in a state of supporting the core mold divided bodyFormed with the main body of the divided bodyWhen the corner connecting part is formed by injection filling the connecting part forming raw material into the cavityat the same timeThe hollow sealing portion of each sealing member by the corner connecting portionTerminalsConnectAnd then retreating the drain hole forming die to release the fitting, and by retreating the drain hole forming die and taking out the core mold divided body from the connection portion, the corner connecting portionIt is characterized by forming a water drain hole.
[0008]
  According to the first aspect of the present invention, (1) in addition to the conventional upper and lower molds and the core structure of the divided structure, the lower seal among the plurality of core-type divided bodies constituting the core type Since a drain hole mold is used for fitting or abutting to and releasing from the portion of the core-type divided body disposed on the member side close to the end of the lower seal member, the lateral side And simultaneously, each terminal of each lower seal member is connected by the corner connecting portion, and at the same time, a drain hole can be formed in a portion of the corner connecting portion close to the lower seal member. (2) A portion close to the end of the lower seal member in the core-type divided body disposed on the lower seal member side, that is, a portion near the free end of the core-type divided body is the drain hole. Since it is supported by the molding die, it is possible to prevent the core-type divided body from wobbling due to the injection pressure of the molten raw material, and stable molding becomes possible. (3) Since the core mold divided body is supported by the water draining mold, deformation of the core mold divided body itself due to the injection pressure that is repeatedly received during mass production can be suppressed. (4)In the state where the tip of the drain hole forming die is fitted in the fitting recess of the core-type divided body on the side of the lower seal member, that is, the free end of the core-type divided body is supported from the side. Since the raw material is injected in a state, it is possible to more reliably prevent the core-type divided body from being displaced due to the injection pressure of the raw material or the holding pressure by the injected raw material after injection.
[0009]
  The invention of claim 2 is the invention of claim 1,The fitting recess is formed on the surface of the main body portion of the core-type divided body, and the inner peripheral portion of the drain hole is formed by the outer peripheral portion of the drain hole forming die.
[0010]
  Further, the invention of claim 3 is claimed in claim1In the invention ofThe fitting recess is formed at the tip of a protruding pin protruding from the surface of the main body part of the core-type divided body, and the inner peripheral portion of the drain hole is formed by the outer peripheral portion of the protruding pin. .
[0011]
  Claims4According to the invention of claim 1 or 2, when the molded product is taken out, compressed air is ejected from the tip of the drain hole forming die to peel off the adhesion between the inner peripheral surface of the corner connecting portion and the core die. It is characterized by that.
[0012]
  Claim4According to the invention of claim 1, in addition to the operational effects of the invention of claim 1 or 2, when the corner connecting portion which is a molded product is taken out from the lower mold and the core die is taken out from the corner connecting portion, Since the peripheral surface and the core mold are easily peeled off, the corner connecting portion is not damaged and is easily taken out.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, the present invention will be described in more detail with reference to embodiments. In addition, the description part in the item of "conventional technology" is used as it is, and duplication description is not carried out. FIG. 1 is a side view of a one-box car with an opening seal S attached to the periphery of the rear door opening 42, FIG. 2 is a front view of the opening seal S, and FIG. Rear lower corner connection N₁4 is an enlarged perspective view of the portion of FIG. 4, and FIG.₁(Or corner connection N on the front lower side₂FIG. 5 is a plan view of the corner molding die F before molding, FIG. 5 is a plan view of the same state, and FIG. 6 is a plan view of the corner molding die F after molding. FIG. 7 shows each core-type divided body D constituting the core type D.₁~ D_ThreeFIG. 8 is a perspective view showing a state in which they are separated and arranged in the vertical direction.₁-X₁FIG. 9 is an enlarged cross-sectional view of FIG.₂-X₂It is a line expanded sectional view.
[0014]
  First, referring to FIG. 4 to FIG. 9, the corner connection N on the lower rear side of the opening seal S is described.₁(Or corner connection N on the front lower side₂) Will be described, and then the corner connecting portion N using the corner forming die F will be described.₁(Or N₂) Will be described. The corner mold F includes a lower mold 11, an upper mold 12, and the corner connecting portion N.₁(Or N₂) In a hollow shape, and the corner connecting portion N having a hollow shape.₁(Or N₂) Lower seal member S₁Drain hole H in the part near₁And a first through fourth intermediate plates 13 to 16 disposed between the lower mold 11 and the upper mold 12.
[0015]
  Further, as shown in FIGS. 4, 8 and 9, the lower mold 11'sOn topIsA stepped portion curved in a curved shape corresponding to the corner connecting portion in plan view is formed, and the lower and rear lateral sides (or the first set surface 11a on the lower side among the surfaces forming the stepped portion (or Each front seal member S₁, S₂(Or S_Three) Is set in close contact with the stepped surface 11b. In the opening seal S, the four seal members S constituting the opening seal S are provided.₁~ S_FourEach trim part 1 has the same shape including the size, and as shown in FIGS. 8 and 9, substantially the lower half of the trim part 1.PartIt is in close contact with the stepped surface 11b.AbbreviationThe upper half part is in close contact with the lower contact surface 13a of the first intermediate plate 13 described later. In the present embodiment, the lower seal member S₁The terminal part of,endCorner connection N from the end₁Hollow seal part with the same length as2 isCut out and missing hollow seal 2didThe end surface of the trim part 1 is the rear side seal member S.₂End face of trim part 1HitIt touches. That is, the lower seal member S₁Corner connection N directly above the trim part 1₁(N₂), Which will be described later, is formed.
[0016]
  Further, the first middle plate 13 is set on the second set surface 11c on the higher side with the stepped portion in the lower mold 11 as a boundary, and the entire shape of the front end surface of the first middle plate 13 has both ends. Surfaces (more precisely, end surfaces of the trim parts 1) are in contact with each otherUnderSide and rear side seal members S₁, S₂Corresponding to the curved shape of the connecting portion, a convex curved surface is formed.AndAs described above, the lower half portion of the front end surface of the first intermediate plate 13 has the lower and rear lateral seal members S.₁, S₂The lower contact surface 13a is in close contact with the upper half side surface of the trim portion 1 constituting the, On the first intermediate plate 13Both end portions in the longitudinal direction (curved direction) of the half portion are the lower and rear lateral seal members S.₁, S₂Are closely attached to the outer peripheral surface of the substantially lower half portion of the hollow seal portion 2 that constitutes the corner seal portion N.₁(N₂) To form a cavity C for forming a cavity C. For this reason, the center part of the height direction of the front end surface of the first intermediate plate 13 has a shape protruding in a direction parallel to the plate surface. In the present embodiment, the lower and rear side seal members S are provided.₁, S₂The cross-sectional shape of the cavity forming surface 13b of the first intermediate plate 13 is, Both endsEach corresponds to the outer peripheral surface shape of each hollow seal portion 2, 2 ',Both endsIn order to connect the outer peripheral surface shapes of the hollow seal portions 2 and 2 ′ having different cross-sectional shapes to each other,The cross-sectional shape isIt is gradually changing.
[0017]
  A second intermediate plate 14 is disposed on the first set surface 11 a of the lower mold 11. The overall shape of the front end surface 14a of the second intermediate plate 14 is the lower and rear lateral seal members S.₁, S₂Corresponding to the curved shape of the connecting portion, the curved surface is curved, and each of the lower and rear lateral seal members S₁, S₂Of each trim part 1 (see FIGS. 8 and 9). Here, as shown by the two-dot chain line in FIG. 8 and FIG. 9, the second intermediate plate 14 is in contact with the bottom of the opening groove of each trim portion 1.AheadThe end may protrude, and a recess corresponding to the shape of the opening end of the trim portion 1 may be formed near the base of the protruding tip. In this case, when the projecting tip of the second intermediate plate 14 enters the trim portion 1 and the opening end of the trim portion 1 is fitted into the recess, the seal member is set or the corner connection portion is formed. It is possible to prevent positional displacement at the time and to stably fix the seal member at a predetermined position. Moreover, since the front end of the second intermediate plate 14 enters the groove of the trim portion 1, it is possible to prevent the inflow of the raw material when the corner connection portion is formed.
[0018]
  Further, the core type D has a corner connection portion N.₁(N₂) In a hollow shape, and a corner connecting portion N₁(N₂After the molding of), in order to be able to be taken out from the hollow portion, it is divided into three along the longitudinal direction as shown in FIGS. That is, the core type D is the first core type divided body D disposed in the center.₁And lower seal member S₁2nd core type division body D arranged on the side of₂And the rear side seal member S₂3rd core type division body D arranged by the side of_ThreeAnd is composed of three parts. First to third core-type divided bodies D₁~ D_ThreeAre the main body portions 21a, 21b, 21c for forming the cavity C, and the corner connecting portion N.₁(N₂) And core type hole H₂For formingProtrusionIt consists of bases 22a, 22b and 22c.
[0019]
  First and third core type divisions D₁, D_ThreeMain body portions 21a and 21c are curved core-shaped second core-shaped divided bodies D.₂Compared to the main body portion 21b, it is short and straight. First to third core-type divided bodies D₁~ D_ThreeofProtrusionThe base portions 22a, 22b, and 22c are shaped to be in close contact with each other when set on the upper surface of the second intermediate plate. That is, the first core type divided body D₁In,allOver the longProtrusionThe base 22a is formed, and the second core-type divided body D₂Includes a first core-shaped divided body D.₁At the end of the side to be connectedProtrusionA base 22b is partially formed, and a third core-type divided body D_ThreeIncludes a rear side seal member S.₂Except for the part inserted into the hollow seal part 2 of the terminal part of,allOver the longProtrusionA base 22c is formed.
[0020]
  Then, as shown in FIGS. 4 and 7, the second core-type divided body D having a curved shape is formed.₂In the main body 21bProtrusionAn approximate end for fitting the front end of the drainage hole forming die E to the end opposite to the base 22b and to the outer side in the set statesquareA fitting hole 23 having a shape is formed.
[0021]
  Further, as shown in FIGS. 4, 5, and 8, the second core-type divided body D on the upper surface of the second intermediate plate 14.₂ofProtrusionThe lower seal member S from the side of the base 22b₁The corner connection N₁(N₂The third intermediate plate 15 for forming the cavity C is set. That is, the tip end surface in which the overall shape of the third intermediate plate 15 is concave is a cavity forming surface 15a. In addition, the second core-type divided body D in the third intermediate plate 15₂In the portion corresponding to the fitting hole 23 provided in the main body portion 21b, the drain hole forming die E in the shape of a rod is the second core-type divided body D.₂A sliding fitting groove 15b (see FIGS. 4 and 5) is formed so as to be able to advance and retract with respect to the main body portion 21b.
[0022]
  In addition, the drain hole mold E isIts tip isCorner connection N₁(N₂Through the cavity C),in front2nd core type division D₂Fits into the fitting hole 23 of the main body 21bShiCorner connecting part N, which is a molding part₁(N₂) To drain hole H₁Is formed. The cross-sectional shape of the drain hole mold E issquareShape, AheadThe end surface 31 has a concave shape so that the end surface 31 can be fitted into the fitting hole 23 formed in the outer peripheral surface of the curved cylindrical body 21b. Further, as shown in FIG. 7, the drain hole forming die E has a corner connecting portion N after forming.₁(N₂When the core D is taken out from the inside of the corner connection portion N₁(N₂), The compressed air is exerted between the inner peripheral surface and the core mold D, and the corner connection N₁(N₂) And the core die D are peeled off to facilitate separation of the two, and the compressed air ejection holes 32 are formed therethrough. 4 and 5, reference numeral 16 denotes a rear side seal member S.₂4 shows a fourth intermediate plate disposed on the opposite side to the first intermediate plate 13.
[0023]
  And the lower side sealing member S which comprises the opening seal S using the said corner shaping | molding die F₁And rear side seal member S₂Corner connection N to connect₁Is formed as follows. First, the second core type division D constituting the core type D₂The front end of the main body 21b of the lower seal member S₁And inserted into the hollow seal portion 2 of the third core-type divided body D_ThreeThe rear side seal member S is attached to the tip of the main body 21c.₂Is inserted into the hollow seal portion 2 '. Next, the first to third core-type divided bodies D₁~ D_ThreeThe lower and rear lateral seal members S so that the main body portions 21a to 21c are continuous.₁, S₂Is set on the first set surface 11a of the lower mold 11,Each seal member S ₁ , S ₂ ofThe trim part 1 is brought into close contact with the step surface 11 b of the lower mold 11.
[0024]
  Next, the first intermediate plate 13 is disposed on the second set surface 11c of the lower mold 11,Of the first intermediate plate 13Lower contact surface 13a at the tipDownSide and rear side seal members S₁, S₂The bottom of the continuous trim portion 1 (the side opposite to the opening) is brought into contact with the upper half. On the other hand, the second intermediate plate 14 is disposed on the first set surface 11a of the lower mold 11,Of the second intermediate plate 14Curved tip surface 14aDownSide and rear side seal members S₁, S₂Are brought into contact with the opening side of the continuous trim portion 1. Thereby, each 1st-3rd core type division body D₁~ D_ThreeEachProtrusionThe base portions 22 a to 22 c are supported by the second intermediate plate 14. Next, each core type D on the upper surface of the second intermediate plate 14ProtrusionThird and fourth intermediate plates 15 and 16 are arranged on both sides of the base portions 22a to 22c, respectively, and a drain hole forming die E is inserted into the sliding fitting groove 15b formed in the third intermediate plate 15. After inserting and fitting, the second core type divided body D₂The water drainage hole mold E is brought close to the main body portion 21b,For drain hole mold ETipBeforeIt is made to fit in the fitting hole 23 formed in the main body part 21b. As a result, the second core-shaped divided body D having a curved rod shape₂In the main body 21bProtrusionThe second core-type divided body D is supported on the side opposite to the base 22b.₂The body portion 21b of theSecond core type division D ₂ ProtrusionBoth ends are supported by the base 22b and the drainage hole forming die E, and the lower seal member S₁Support of the end portion on the side inserted into the hollow seal portion 2 is stabilized.
[0025]
  Finally, the upper die 12 is lowered and set above the lower die 11 (more precisely, above the first to fourth intermediate plates 13 to 16 disposed above the lower die 11). The molds 11 and 12 are clamped. As a result, as shown in FIGS. 8 and 9, the cavity forming surfaces 13 b and 15 a formed on the front end surfaces of the first and third intermediate plates 13 and 15 and the lower surface of the upper mold 12 are formed. Each core-shaped divided body D in the space formed by the cavity forming surface 12a.₁~ D_ThreeThe end portions of the main body portions 21a to 21c are inserted and arranged so as to contact each other in a continuous state.₁The cavity C is formed. Further, as shown in FIG. 8, the tip of the rod-shaped drain hole forming die E penetrates the cavity C.
[0026]
  Then, when the rubber raw material M, which is a connecting portion forming raw material, is injected into the cavity C through a sprue and a runner (both not shown) formed in the upper mold 12,Rubber raw material MDepending on the injection pressureBeforeInjection filling to every corner of the cavity C is performed. Here, the second core-type divided body D₂The main body 21b ofBothEnd isProtrusionBy the base 22b and the drainage hole forming die ESupportTherefore, even if an injection pressure acts on the main body portion 21b, the predetermined position is maintained, the position is not displaced, and deformation of the main body portion 21b itself is prevented. For this reason, the corner connection N₁The molding is stabilized.
[0027]
  Next, after the rubber raw material M injected into the cavity C is heated by the conduction heat from the mold F to finish vulcanization, compressed air is ejected from the ejection holes 32 of the drain hole mold E. Molded hollow corner connection N₁When,Corner connection N ₁ ofThe compressed air is blown in between the core mold D disposed in the hollow portion, and both of them are peeled off. Thereafter, the upper mold 12 is raised, and at the same time, the drain hole forming mold E is retracted. Each of the lower and rear side seal members S formed by injection molding₁, S₂Corner connection N to connect₁Is taken out from the lower mold 11 together with the core mold D.
[0028]
  Thereafter, among the core types D of the split structure, first, the first core-type split body D at the center₁Next, the third and second core-type divided bodies D_Three, D₂Are sequentially taken out in this order. As a result, as shown in FIG.₁Both end portions of the sealing member S on the lower side and the rear side are respectively₁, S₂Each of the joint portions T to the hollow seal portions 2, 2 'constituting₁, T₂Are joined together. Corner connection N₁Lower seal member S at₁In the part that is close to the lower side in use, the drain hole H₁And the corner connection N₁Rear side seal member S₂In the part close to, the core-shaped hole H that has a slit shape along the bending direction₂Is formed. In FIG. 3, T_ThreeAre the lower and rear side seal members S.₁, S₂The terminal part of the trim part 1 is shown.
[0029]
  In addition, with respect to the drain hole forming mold, as in the above-described embodiment, the core mold divided body D₂Although it is preferable to fit in the fitting hole 23 provided in the main body portion 21b, the tip end surface of the drainage hole forming die E may simply be brought into contact with the outer peripheral surface of the main body portion 21b. Further, as shown in FIG. 10, the second core-type divided body D₂Toward the outside of the main body portion 21b (the lower portion in use)ProtrusionThe pin 33 is fitted in a protruding state,ProtrusionYou may make it the structure which the convex part 34 formed in the front-end | tip of the drain hole shaping | molding die E 'fits into the recessed part 33a formed in the front end surface of the pin 33. FIG.
[0030]
  According to this structure, a burr | flash does not generate | occur | produce in the hollow inside side of a water drain hole, but a water drain hole with favorable water drainage can be formed.
[0031]
  Further, using the corner mold F, the lower and front side seal members S are used.₁, S₂Corner connection N to connect₂Can also be molded. The remaining two corner connections N_Three, N_FourIs molded using a normal corner mold without the drain hole mold E.
[0032]
  Further, the opening seal S has the same cross-sectional shape including the size of the trim portion 1 constituting the opening seal S. The cross-sectional shape of the trim portion 1 is the same as that of the seal member S.₁Same as S₂And T shown by a two-dot chain line in FIG._FourSeal member S at the position₁Cut the trim part of the corner and connect the corner connection N₁When forming the seal member S₁Same as S₂Between terminals (T_Three, T_Four), The connecting portion of the trim portion is formed. Moreover, the cross-sectional shape of the trim part 1 is the sealing member S.₁Same as S₂Even if the same is true for both terminals (T_Three, T_Four) May be formed between the trim portions, and the trim portions can be seamlessly connected by the connection portion, so that the appearance is good. Moreover, when setting each sealing member in a shaping | molding die, since there exists a clearance gap between terminals, the dispersion | variation in the length of a sealing member can be adjusted with this clearance gap. Seal member S₁Same as S_ThreeThe same applies to other corner connecting portions such as between the two.
[0033]
  In addition, the said embodiment is an example which implemented this invention with respect to shaping | molding of the corner connection part of the rectangular frame-shaped opening seal S with which the periphery of the door opening part of the rear part of a one box car is mounted | worn. However, the present inventionringIt is not limited to the shaped weather strip, and any shape can be used as long as it forms a corner connecting portion for connecting the lower and side seal members, and it is also applied to an L-shaped weather strip having only two sides. Is possible. Further, the present invention is also preferably implemented when a new hollow seal portion is formed in a weather strip in which the hollow seal portion is partially removed and the trim portion is continuous.
[0034]
【The invention's effect】
  According to the present invention, a corner forming die is used to form the corner connecting portions of the lateral and lower seal portions constituting the weather strip, and at the same time, a drain hole is formed in the hollow seal portion of the corner connecting portion. As a result, there is no need to form a separate drain hole in the subsequent process, and the number of molding steps for the weather strip as a whole is reduced. Also, at the same time as forming the corner connection part, a drain hole is formed in the hollow seal part of this corner connection part,Drain holeSince the formation position and size are constant, the quality of the weather strip is also improved.
[Brief description of the drawings]
FIG. 1 is a side view of a one-box car with an opening seal S attached to the periphery of a rear door opening 42. FIG.
FIG. 2 is a front view of an opening seal S. FIG.
[Fig. 3] Corner connection N on the lower rear side of the opening seal S₁It is an expansion perspective view of the part.
[Fig. 4] Corner connection N on the lower back side of the opening seal S₁(Or corner connection N on the front lower side₂It is a perspective view of the state before shaping | molding of the corner shaping | molding die F for shape | molding).
FIG. 5 is a plan view of the same state.
FIG. 6 is a plan view of a corner forming die F after forming.
FIG. 7: Core-type divided bodies D constituting the core-type D₁~ D_ThreeIt is a perspective view of the state which isolate | separated and has arrange | positioned to the perpendicular direction.
FIG. 8 X in FIG.₁-X₁It is a line expanded sectional view.
FIG. 9 X in FIG.₂-X₂It is a line expanded sectional view.
FIG. 10 is a cross-sectional view showing a usage state of a drain hole forming die E ′ according to another embodiment.
[Explanation of symbols]
                D: Core type
      D₁, D₂, D_Three: Core type division
          E, E ': Drain hole mold
                F: Corner mold
                M: Molten rubber raw material (connection part forming raw material)
          N₁, N₂: Corner connection
                S: Opening seal (weather strip)
              S₁: Lower seal
              S₂: Rear side seal
              S_Three: Front side seal
              11: Lower mold
              12: Upper mold
    21a to 21c: the main body of the core type divided body
    22a-22c: Projection base of core-type divided body
              23: Fitting hole of drain hole mold
              32: Jetted hole for compressed air formed in the drainage hole mold
              33: Protruding pin

Claims (4)

A long lateral seal member and a lower seal member, which are continuously attached along the lateral and lower opening portions through the lower corner portion of the door opening portion of the vehicle body, form a trim portion and a hollow seal portion. respectively integrally has, the method of manufacturing a weather strip between terminals of the hollow seal portion are connected by hollow corner connection portion molded by the corner mold at the lower corner portion of each seal member ,
Each of the upper and lower molds that can be opened and closed in the vertical direction and defines the outer peripheral surface shape of the corner connecting portion when closed ,
A rod-shaped main body portion that is disposed at a position where the corner connection portion is formed and defines an inner peripheral surface shape of the corner connection portion, and projects from the part of the main body portion toward the outside of the corner connection portion, and an upper and lower mold A plurality of core-type divided bodies integrally having a protruding base that is sandwiched between both molds and fixed between the upper and lower molds when the mold is closed;
With corner mold having a draining hole mold provided advance and retreat possible with respect to the core die dividing member disposed on a side of the plurality of core-type split body sac Chi lower seal member,
The core-shaped divided body disposed on the lower seal member side includes the protruding base portion on the side seal member side of the rod-shaped elongated main body portion, and the other end on the lower seal member side of the main body portion. Comprises a fitting recess into which the tip of the drain hole mold fits when the drain hole mold advances.
The upper and lower molds are closed and fixed with the projecting bases of the plurality of core mold divisions in between, and the drain hole forming mold is advanced, and the tip of the drain hole forming mold is arranged on the lower seal member side. Cavities formed by the upper and lower molds and the main body part of the core-shaped divided body in a state where the core-shaped divided body is supported by being fitted in a fitting recess of the core-shaped divided body provided Injecting and filling the connecting portion forming raw material to form the corner connecting portion and simultaneously connect the ends of the hollow seal portions of the sealing members by the corner connecting portion ,
Thereafter, the drain hole forming die is retracted to release the fitting, and the drain hole is formed in the corner connecting portion by retreating the drain hole forming die and taking out the core mold divided body from the connecting portion. A method for producing a weather strip. The said fitting recessed part is formed in the surface of the main-body part of the said core type | mold division body, The inner peripheral part of the drain hole is shape | molded by the outer peripheral part of the drain hole shaping | molding die. Weatherstrip manufacturing method. The fitting recess is formed at the tip of a protruding pin protruding from the surface of the main body portion of the core-type divided body, and the inner peripheral portion of the drain hole is formed by the outer peripheral portion of the protruding pin. The method for producing a weather strip according to claim 1.   3. The method according to claim 1, wherein at the time of taking out the molded product, compressed air is ejected from the tip of the drain hole forming die to peel off the close contact between the inner peripheral surface of the corner connecting portion and the core die. Weatherstrip manufacturing method.

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