JPH0569445A - Mold for molding and bonding weather strip - Google Patents

Abstract

PURPOSE:To prevent the interference of the molding surface of an inner plate and a core when the inner plate is opened to be erected with respect to a lower mold at the time of the setting of a mold. CONSTITUTION:A projection 5 for prescribing the opening and closing position of an inner plate is provided to the rear end surface of the inner plate 7 and the recessed part 16 for receiving the projection 15 when the inner plate 7 is opened to be erected is provided to a lower mold 1. The projection 15 formed to the inner plate itself becomes an obstacle and, unless said projection 15 is retracted from a molding position by predetermined length, the inner plate 7 can not be opened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a mold for molding and adhering two weather strips.

[0002]

2. Description of the Related Art FIGS. 5 and 6 show the above-mentioned conventional mold. An upper die 2 is connected to a lower die 1 via a hinge pin 3 so as to be openable and closable. A V-shaped center core 5 is integrally formed at the front end of the center core mounting plate 4, and the base end of the center core mounting plate 4 is openably and closably coupled to the lower die 1 via a hinge pin 6. .. The portion of the lower mold 1 where the core 5 and the middle plate 7 are arranged is formed thinner than the other portions. The lower end of the lower die 1 (the portion on the side hinged to the upper die 2), and both sides thereof are left thick, and the sliding direction P of the middle plate 7 is left in this portion. An elongated hole 8 is formed along the line. The center plate 7 is arranged so as to face the center core 5 formed at the front end of the center plate mounting plate 4 in the closed state. The molding surface 7a of the intermediate plate 7 is formed into an undercut shape.
Hinge pins 9 are provided on both sides of the rear end portion of the intermediate plate 7, and the hinge pins 9 are inserted into and engaged with the elongated holes 8, respectively. Therefore, the inner plate 7 has a structure that is slidable in the direction of the arrow P, which is a direction of approaching and separating from the core 5, and can be opened and closed at any position around the hinge pin 9. There is.

As shown by the solid line in FIG. 6, in the molded state, the center core mounting plate 4 is closed and the center plate 7 is located at the forward end. The core 5 is arranged in the cavity 11 formed by 2 and. The weather strip W to be bonded is fitted into both ends of the core 5,
A forming raw material is injected into the cavity 11 to form and adhere the two weather strips W. After molding,
First, the center plate 7 is retracted, and then the center core mounting plate 4 is erected, and the center core 5 is pulled out from the molding bonded portion of the two weather strips W.

However, the conventional mold has a structure in which the intermediate plate 7 can be opened and closed at an arbitrary position, and the molding surface 7a of the intermediate plate 7 is formed in an undercut shape, so that the mold is made. When the intermediate plate 7 is opened without retracting the intermediate plate 7 to a predetermined position during the setting of, the forming surface 7a of the intermediate plate 7 having an undercut shape is shown as shown by a chain double-dashed line in FIG. The lower end of the core and the core 5 may interfere (contact) with each other and damage each other. Further, the middle plate 7 may be retracted to a predetermined position and the middle core mounting plate 4 may be opened in this state. In this case, the upper end of the molding surface 7a of the middle plate 7 may be damaged. In this way, when the molding surface of the mold is damaged, the damaged portion is transferred to the molded product to impair its appearance, and when the degree of damage increases, the intermediate plate 7,
Or there was a problem that the core 5 had to be replaced.

[0005]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to prevent interference between the molding surface of the middle plate and the center core when the middle plate is opened and is made to stand upright with respect to the lower mold during setting of the mold. Is to prevent it.

[0006]

[Means for Solving the Problems] Means adopted by the present invention for solving this problem are a lower mold, an upper mold hinged to the lower mold, and a middle mold attached to the lower mold. It is composed of a core and an intermediate plate slidable in the front-rear direction with respect to the lower mold and hinged to be openable and closable, and is formed by the lower mold, the upper mold and the intermediate plate. A mold for arranging the core in a cavity, fitting two weather strips into both ends of the core, and injecting a molding raw material into the cavity to mold and adhere the weather strips. In order to accommodate the projection body at the rear end surface of the middle plate, the projection body for restricting the open / close position thereof is projected rearward, and the projection body is housed in the lower mold when the middle plate is opened and erected. To form a recess, and the middle plate is retracted from the molding position by a predetermined length. It is that you open structure only in the rear from the position.

[0007]

According to the present invention, a protrusion is formed at the rear end of the intermediate plate, and a recess for accommodating the protrusion when the intermediate plate is opened and erected is formed in the lower die to form the intermediate plate. The structure is such that it does not open unless it is slid from the molding position by a predetermined length and retracted, and interference between the middle plate and the core is avoided.

[0008]

EXAMPLES The present invention will be described in more detail with reference to examples. It should be noted that the same reference numerals are given to the same or equivalent portions as those described in the above-mentioned "Prior Art", the duplicated description will be avoided, and only the characteristic portions of the present invention will be described. FIG. 1 is a plan view showing a state in which an upper mold 2 of a mold according to the present invention has been removed, and FIG. 2 shows X in FIG. 1 in a molding state.
FIG. 3 is a cross-sectional view taken along the line X-X, FIG. 3 is a cross-sectional view taken along the line X-X in FIG. 1 with the intermediate plate 7 opened, and FIG. It is a partial perspective view of the state which entered and stood up. 1 to 4, the lower mold 1
A pair of protrusions 12 are provided at the rear end of the intermediate plate 7 at predetermined intervals along a direction orthogonal to the sliding direction P of the middle plate 7 so as to protrude from the upper surface. Are formed along the sliding direction P of. This protrusion 12 is
The lower mold 1 is formed so as to enter the inside from the side end surface 1a. A hinge pin 14 is provided at the rear end portion of the middle plate 7 so as to penetrate along the direction orthogonal to the sliding direction P, and projecting portions at both ends of the hinge pin 14 are inserted into the elongated holes 13, respectively. On the rear end surface 7b of the middle plate 7, a protrusion 15 having a predetermined width for restricting the opening / closing position thereof is provided so as to protrude rearward. Also, the rear end of the lower mold 1 (the upper mold 2
In the portion (on the side where it is hinged to), a recess 16 is formed for accommodating the projection 15 formed therein when the intermediate plate 7 is opened and raised. In the middle plate 7,
A notch 17 is provided to prevent the protrusion 12 from interfering with the slide 12. The other parts have the same structure as the conventional mold described above.

When setting the mold, the middle plate 7 is slid in the direction of the arrow P and opened / closed around the hinge pin 14, or the center core mounting plate 4 is used.
Is opened and closed centering around the hinge pin 6, but since the projection 15 is provided on the rear end surface 7b of the intermediate plate 7 so as to project rearward, the intermediate plate 7 is not located at the position shown in FIG.
Cannot be rotated upwards about the hinge pin 14 due to the obstacle of the projection 15. In order to rotate the middle plate 7 upward so as to stand upright with respect to the lower mold 1, as shown by the chain double-dashed line in FIG. When the hinge pin 14 is rotated upwards at, the projection 15 thereof enters the recess 16 formed in the lower mold 1, and the rear end surface 15a of the projection 15 is supported by the bottom surface 16a of the recess 16, Figure 3
Also, as shown in FIG. 4, the middle plate 7 is erected and supported by the lower mold 1. As described above, in order to raise the middle plate 7 with respect to the lower mold 1, first, the middle plate 7 has to be slid backward by a predetermined length. Will not interfere with.

Further, in the above embodiment, the rear end surface 15a of the projection 15 is brought into contact with the bottom surface 16a of the recess 16 so that the middle plate 7
The projection 15 has a structure in which
6, the upright support of the middle plate 7 with respect to the lower mold 1 may be performed by the rear end surface 7b of the middle plate 7.

[0011]

According to the present invention, a projection is provided on the rear end surface of the middle plate so as to project rearward, and a recess for accommodating the projection when the middle plate is opened to stand upright with respect to the lower mold is provided. A simple modification of the conventional mold, which is formed in this lower mold, has a structure in which the middle plate cannot be opened unless it is slid from the molding position for a predetermined length and retracted, and the middle plate and the middle core are set when the mold is set. Interference with can be avoided.

[Brief description of drawings]

FIG. 1 is a plan view showing a state in which an upper mold 2 of a mold according to the present invention is removed.

2 is a sectional view taken along line XX of FIG. 1 in a molded state.

FIG. 3 is a sectional view taken along line XX in FIG. 1 with an intermediate plate 7 opened.

FIG. 4 is a partial perspective view of a state in which the protrusion 15 of the middle plate 7 is inserted into the recess 16 of the lower mold 1 and the middle plate 7 stands upright with respect to the lower mold 1.

FIG. 5 is a plan view showing a state in which an upper die 2 of a conventional die is removed.

6 is a cross-sectional view taken along the line YY of FIG.

[Explanation of symbols]

 W: Weather-strip 1: Lower mold 2: Upper mold 5: Core 7: Middle plate 7a: Forming surface 7b: Rear end surface 11: Cavity 15: Protrusion 16: Recess

Claims (1)

[Claims] 1. A lower die, an upper die hinged to the lower die, a center core attached to the lower die, and a slideable front-rear direction with respect to the lower die. The inner core is configured to be openably and closably hinged to each other, and the core is disposed in a cavity formed by the lower mold, the upper mold, and the middle plate, and two cores are provided at both ends of the core. In the mold for fitting the weather strips of the above, respectively, and injecting the molding raw material into this cavity to mold and adhere the weather strips to each other, a protrusion for regulating the open / close position of the intermediate plate on the rear end face thereof. And a recess for accommodating the protrusion of the lower plate when the intermediate plate is opened and erected, and the intermediate plate is retracted from the molding position by a predetermined length. The window is characterized in that it can be opened and closed only from the position to the rear. A die for molding and adhering an ether strip.