JP3487566B2 - Mold for foam molding - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold for foam molding capable of discharging molding steam with a simple structure and accurately. 2. Description of the Related Art For example, as a foaming mold used for molding a skin-integrated foamed product such as a door trim part or a headrest, a predetermined shape is formed by heating between a pair of male and female dies which can freely come and go. There is widely known a type of foam molding of a product, and the mold surface is generally provided with a large number of core vent holes for discharging steam so as to discharge steam used for heating out of the mold. is there. However, in the conventional foaming mold described above, as shown in FIG. 2 , an exhaust pipe 21 is connected to each core vent hole on the back side of the mold 20 and then the exhaust pipe 21 is connected. The pipe 22 communicates with the drain outlet 23 and discharges steam out of the mold from there.
There is a problem that the connection work between the core vent hole and the exhaust pipe 21 is complicated and it takes a long time to assemble, and there is a problem that piping is complicated and workability is poor. Further, there is a problem that it is difficult to add or change the core vent holes so as to obtain the optimum molding conditions. SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and has a very simple structure for connecting a core vent hole and a drain discharge port. In addition, there is no need for complicated piping, the mold manufacturing cost is significantly reduced, an effective working space can be secured, and the core vent hole can be easily added or changed. It has been completed for the purpose of providing a foam molding die capable of meeting various molding conditions. [0005] The foam molding die of the present invention, which has been made to solve the above problems, is arranged on a die body .
A core vent hole for steam discharge is provided on the back of the mold body.
Together is communicated to a series of grooves is disposed at a predetermined interval, it is characterized in that the steam exhaust groove communicating with the drain outlet cover the groove portion in the cover body. [0006] [action] those having such a structure is that the steam used to heat at the time of foam molding is released into the mold out from Koabento holes Ru similar der is conventional, the Koabento holes Communicated with the groove formed on the back of the mold body, and
Since the groove is formed as a steam discharge groove which is covered with the lid and communicates with the drain discharge port, the steam discharged from the core vent hole is surely discharged out of the mold through the steam discharge groove. Next, the present invention will be described in detail with reference to an embodiment shown in the drawings. The drawings show a foaming mold for foaming a door trim product for an automobile. In the figure, reference numeral 1 denotes a male mold body which can be freely attached and detached, 2 denotes a female mold body, and 3, 4 denotes a mold body. Master frames 3a and 4a that hold the mold body are back plates that seal the opening surfaces of the master frame to form a steam chamber. Also, the male mold body 1 on the male side is
The back side is a striped uneven surface, and the concave portion is provided with a large number of core vent holes 5 for supplying steam for introducing steam for heat molding into the molding cavity.
In, the protruding portion has Koabento hole 6 is provided a large number of steam discharge for discharging steam used to heat molding to mold the outside, the above configuration is conventional in this kind foaming mold basically Is the same as The above-mentioned core vent hole 6 for discharging steam is
As shown in FIG. 1, the convex portion on the back surface of the mold body 1
Are communicated to a series of grooves 7 formed in the top surface, the groove 7
Is a steam discharge groove 12 which is covered with a lid 10 via a packing member 9 and communicates with a drain discharge port 11. In addition,
In the embodiment, the lid 10 blocks and covers the core vent hole 6 for discharging the steam in the horizontal direction, forms a vertical communication path 13 on both sides, and finally communicates with the drain outlet 11. However, the design may be arbitrarily changed, for example, by blocking the core vent hole for vertical steam discharge and forming a horizontal communication path at the lower end portion. Of course. [0009] In the above configuration,
In the same manner as in the prior art, after performing foam molding by a conventional method using the steam introduced from the steam supply port 14, the steam used for heating is discharged from the core vent hole 6 for steam discharge to the outside of the mold. The hole 6 is formed on the back surface of the mold body 1.
Since the groove 7 reaches the groove 7 and the groove 7 is covered with the lid 10 to form the steam discharge groove 12 leading to the drain discharge port 11, the steam discharged from the core vent hole 6 is discharged through the groove 7. After being guided to the groove 12 and then concentrated to the vertical communication path 13 on both sides, it is further collected at the drain discharge port 11 at the lower end and discharged from the mold without fail. Since in the present invention is obtained by disposing a groove 7 communicating with the Koabento hole 6 of a conventional manner each Koabento unlike each hole that connects the exhaust pipe steam exhaust, bad locations foaming state Accordingly, it is possible to easily add or change the position of the core vent hole 6 and to easily set the optimum molding conditions. As is apparent from the above description, the present invention has a very simple structure for connecting the core vent hole and the drain discharge port, so that the assembling work and the like can be performed easily and in a short time.
In addition, there is no complicated piping, the production cost of the mold can be significantly reduced, and an effective working space can be secured. Further, core vent holes can be easily added or changed, and always correspond to the optimum molding conditions. Is what you can do. Therefore, the present invention greatly contributes to industrial development as a foam molding die that has eliminated the conventional problems.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing an embodiment of the present invention. FIG. 2 is a rear perspective view showing a conventional example . [Description of Signs] 1 Mold body 6 Core vent hole 7 for steam discharge 7 Groove 10 Cover 11 Drain discharge port 12 Steam exhaust groove

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B29C 44/00-44/60

Claims (1)

(57) a required interval on the back of the Claims 1] die body a Koabento hole (6) of the mold body (1) to provided a steam discharging (1)
Together is communicated to a series of grooves and Oite arranged (7),
A foam molding die, wherein the groove (7) is covered with a lid (10) to form a steam exhaust groove (12) communicating with a drain discharge port (11).