JPH0636815U - Vent scrap removal device for resin molding dies - Google Patents

Abstract

(57) [Summary] [Purpose] The vent waste clogged in the vent hole is automatically and completely removed without human intervention. A resin molding die including an upper die 3 and a lower die 1, and a core 6 disposed between the upper die 3 and the lower die 1, wherein the upper die 3 can be opened and closed with respect to the lower die 1. In addition to pivoting, the core frame 8 provided with the core 6 is pivotally supported similarly to the upper mold 3,
On the core frame 8 located outside the upper mold 3 with respect to the mold cavity 7, a vent dust adhering rod 10 that enters a vent hole 9 provided in the upper mold 3 is provided in a protruding manner.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention is a resin molding die that can automatically remove vent waste that has exuded from the vent hole of a resin molding die, for example, a foam molding die, with the opening and closing operation of the mold. The present invention relates to a vent waste removing device.

[0002]

[Prior art]

 For example, when molding a foamed resin molded product using a molding die, it is usually assumed that gas is vented through a large number of vent holes provided in the upper mold. It is inevitable to allow not only the escape of the resin but also the exudation of a small amount of the molding resin, and the vent waste as the exuding resin is cut and separated from the molded product when the mold is opened. It will be left in the vent hole as it is. Therefore, in order to use the molding die for the next foam molding, it is necessary to remove all the vent dust remaining in the vent hole.

[0003]

[Problems to be solved by the device]

 Therefore, in the past, in order to remove the vent waste, it was decided to insert a rod-shaped vent waste extruding member into each vent hole by the operator's hand, but this would significantly increase the number of work steps. In addition, the vent waste, which is almost mushroom-shaped as a whole, has a relatively high temperature.It is necessary to insert the vent waste extruding member from the molding surface side of the upper mold and pull it out, so the working environment is bad. There were also other problems, and there was also the problem that product defects occurred at the points where the vent waste was forgotten. The present invention has been made as a result of studying how to solve all of these problems, and the purpose of the present invention is to eliminate all the vent dust remaining in the vent hole without any special man-hours. (EN) It is possible to provide a vent waste removal device for a resin molding die that can automatically remove the waste without doing the above.

[0004]

[Means for Solving the Problems]

 The vent waste removing device of the present invention is a resin molding die including upper and lower molds and a core arranged between these molds, in which the upper mold is pivotably supported with respect to the lower mold. In both cases, the core frame provided with the core is pivotally supported in the same manner as the upper mold, and all the vent holes provided in the upper mold are located in the core frame located outside the upper mold with respect to the mold cavity. Each bent waste adhering rod that goes into the

[0005]

[Action]

 In this vent scrap removal device, resin molding, such as foaming resin molding, is performed with the upper and lower molds closed, so that the vent scraps that have exuded from the vent holes enter the vent holes of the upper mold. It will adhere to the circumference of the rod, and during subsequent mold opening, due to the relative deformation of the upper mold in the direction away from the core, in other words, in the direction closer to the core frame, the vent waste will be removed. Is cut from, for example, the surface of the molded product that surrounds the core, and along with the movement of the upper mold, it is moved from the tip to the base along the bent waste attachment rod.

When the mold is reclosed after the molded product is removed from the core, the upper mold is relatively displaced in the direction of approaching the core, which causes the upper mold to be pulled out from the vent hole. The bent waste remains on the base portion of the rod due to the frictional force between the bent waste and the rod attached with the bent waste. Therefore, here, it is possible to automatically remove all of the vent debris remaining in the vent hole under the action of the rod for adhering vent debris that enters into the upper vent hole without using any human hands. Become.

By the way, when a plurality of vent debris remains on one rod in a skewered shape due to the repeated removal of the vent debris, for example, the diameter and other dimensions are gradually increased toward the base side. Alternatively, it is preferable to sequentially break or cut and drop the vent debris approaching the base end portion thereof under the action of the vent debris-attaching rod itself having a cutting blade provided at the base portion.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing an embodiment of the present invention in a mold closed state, in which 1 denotes a lower mold as a fixed mold.

Here, one end of the upper mold 3 is pivotally supported on one end of the lower mold 1 via the bracket 2 so that the upper mold 3 can be opened and closed as required, and The closing position of 3 is specified by the contact of the upper die 3 with the lower die 1, and the opening operation of the upper die 3 is provided on the swing hook 4 provided at the other end and the lower die 1. If it can be restrained under the hook with the hook rod 5, it will be tightened.

Reference numeral 6 in the figure shows a core arranged between the lower mold 1 and the upper mold 3. The core 3 cooperates with the molds 1 and 3 to form a mold cavity 7 Partition.

The core 3 is integrally provided on a core frame 8 located outside the upper mold 3 with respect to the mold cavity 7, that is, on the upper side in the figure. A pivoting movement can be carried out with the pivoted core frame 8.

In addition, here, the core frame 8 is pivotally supported on the bracket 2 coaxially with the upper mold 3 so that the core frame 8 is rotated concentrically with the upper mold 3 and the lower mold The rotational limit position in the direction is specified, for example, by the action of a stripper (not shown) at its horizontal position. At this rotation limit position of the core frame 8 and thus the core 6, the upper mold 3 in the closed position is in close contact not only with the upper mold 1 but also with the core 6 as shown in the drawing. 7 can be sufficiently sealed.

By the way, the upper die 3 is provided with a plurality of vent holes 9 for venting gas, and these vent holes 9 are opened to the die cavity 7, and the core frame 8 projects downwardly therefrom. Within each vent hole, there is preferably provided a vent debris attachment rod 10 which extends over substantially the entire length of the vent hole.

According to this structure, when the swinging hook 4 provided on the upper die 3 and the engaging rod 5 are disengaged to open the upper die 3, the upper die 3 is closed by the core frame 8 As a result, the core frame 8 and thus the core 6 are also rotated in the opening direction. As a result, the bent waste sticking rods 10 protruding from the core frame 8 are As shown in FIG. 2, the upper mold 3 is largely projected to the inner surface side through the vent hole 9.

On the other hand, when the upper mold 3 is closed, the core frame 8 and the core 6 are supported by the upper mold 3 and gradually rotated in the closing direction, and then the core frame 8 is closed. After the rotational movement is restrained by a stopper (not shown), the upper die 3 gradually approaches the core 6 as the closing movement of the upper die 3 continues, and finally the upper die 3 and the core 6 are closed. As shown in FIG. 1, a close contact state is brought about, whereby each bent waste adhering rod 10 is displaced backward relative to the upper mold 3.

The operation of the above-described device will be described below with reference to the enlarged view of the main part shown in FIG. For example, when the foamed resin raw material is injected into the lower mold and the upper mold 3 is closed as shown in FIG. 3 (a), as described above, the vent waste adhering rod 10 is attached to the upper mold 3. It goes into the provided vent hole over almost the entire length of it.

Here, when the foaming of the foamed resin raw material progresses, the generated gas sufficiently escapes from each vent hole 9, and at a point near the end of the foam molding, a slight amount of the foamed resin becomes As shown in (3), the vent layer 11 is advanced from each vent hole and cured to form a vent layer 11 surrounding the vent layer adhesion rod 10.

The vent layer 11 thus generated hits the mold opening of the upper mold 3 after the molding is completed, and is rotated by the time the upper mold 3 comes into contact with the core frame 8. As shown in (c), the foamed molded product 12 surrounding the core 6 is cut and separated, and is pushed up and displaced toward the base side of the vent dust adhering rod 10.

This pushing-up displacement is continued until the upper die 3 comes into contact with the core frame 8, and thereafter, the core frame 8 and the core 6 are integrated with the upper die 3 in the opening direction. It will be rotated.

After the upper mold 3 is completely opened, most of the operator's hand removes the foamed molded product from the core 6 and separates it from the upper and lower molds 3 and 1 and the core 6. After applying the mold agent and other necessary treatments, the foaming resin raw material is injected again into the lower mold to close the upper mold 3.

In this case, the upper mold 3 leaves the core frame 8 from a point immediately before the end of the mold closing, and is considerably displaced in the direction of approaching the core 6, and the base portion of the vent waste sticking rod 10 is moved. As shown in Fig. 3 (d), the vent waste 11 pushed up to the side will come out of the vent hole 9 and remain at the original push-up position as it is, based on the frictional force between it and the rod 10. .

Thus, according to this device, it is possible to reliably and automatically remove all the vent waste from the vent hole 9 of the upper mold 3 without depending on the manual work of the operator. .

By the way, when the above-described operation is repeated, a plurality of vent wastes 11 remain on one vent waste adhering rod. In such a case, the base portion of the vent waste adhering rod 10 is In order to sequentially break or cut and drop the rods, the cross-sectional dimension of the rod 10 is gradually increased from the distal end toward the proximal end, or the rod 10 is cut at the proximal end portion. It is preferable to provide a blade or the like, which makes it unnecessary to remove the vent waste 11 remaining on the rod 10.

[0024]

[Effect of device]

 As is clear from the above description, according to the present invention, it is possible to automatically and reliably remove the vent waste clogged in the vent hole without the operator's hand. .

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention in a mold closed state.

FIG. 2 is a sectional view showing the apparatus shown in FIG. 1 in a mold open state.

FIG. 3 is a process diagram showing an operation of a vent dust adhering rod.

[Explanation of symbols]

 1 Lower mold 2 Bracket 3 Upper mold 6 Core 7 Mold cavity 8 Core frame 9 Vent hole 10 Vent waste sticking rod

Claims (1)

[Scope of utility model registration request] 1. A resin molding die including an upper die and a lower die, and a core disposed between the upper die and the lower die, wherein the upper die is pivotably supported with respect to the lower die. At the same time, a core frame provided with a core is pivotally supported in the same manner as the upper mold, and a vent that enters the vent hole provided in the upper mold is inserted into the core frame located outside the upper mold with respect to the mold cavity. A vent scrap removal device for resin molds that has a stick attached with scraps.