JPH01234213A - Device for setting insert component in molding tool - Google Patents

Abstract

PURPOSE:To enable the title device to set up insert parts firmly and perform demolding of a molded product smoothly, by a method wherein a sucking and abutting surface where the opening of a holding hole is closed by sucking and abutting of inserted component is formed at the opening part on a mold cavity side. CONSTITUTION:Insert parts are (a) hose joint S made of synthetic resin having double flange parts (b), (b) on a base part of an insert component (a). The flange part (b) is fitted to a dishlike sucking and abutting surface 6 by abutting against the same and a sucking action of a vacuum device 9 is extended to the inside of a holding hole 5 through a through hole 7 by an action of a directional control valve 10. Then a communicating type bent mold cavity constituted of bent type mold cavity halves 4, 4 is formed by clamping a pair of split molds 3, 3 while keeping fixing of insert parts on. Parison is conducted into the bent mold cavity by an air current. After conduction, the sucking action is suspended. Then a molded product provided with a pipe joint S is taken out through the mold. Then the hose joint S comes off through the holding hole 5 without meeting with any resistance.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is directed to blow molding synthetic resin products, etc., in order to implant various insert parts into the molded product at the same time as the molding. It relates to a device that is set in a predetermined position.

(Prior art) Conventionally, for example, in the blow molding of synthetic resin products, as a method of setting an insert part at a predetermined position and angle on the nest surface of a split mold, the insert part is set at a predetermined position and at a predetermined angle on the nest surface of a split mold. A holding hole to be inserted and held in a removable manner is provided, and a means for removably fixing an insert part such as a leaf spring, a stop ball, or a magnet is attached to the holding hole, thereby holding the insert part before molding. Generally, a method is used in which the material is inserted into a hole and fixed by a fixing means.

(Problem to be Solved by the Invention) However, in this conventional method, in order to hold the insert part in a predetermined position and angle even against vibrations and impacts during the operation of the molding function, the fixing force of the fixing means such as the plate spring is insufficient. However, if the fixing force is strengthened, there is a risk of distorting the molded product when it is removed from the mold after molding, resulting in defective products. A great deal of skill and care was required to discover and adjust the fixation means.

It is an object of the present invention to provide an insert part setting device for a mold, which can firmly set an insert part at a predetermined position and angle without requiring any skill, and can smoothly cut out a molded product. Take it as a challenge.

(Means for Solving the Problems) As a means for solving the above-mentioned problems, the device for setting insert parts into a mold according to the present invention includes a device for setting an insert part into a mold cavity at a predetermined position on a mold cavity surface of a mold. A holding hole is provided to be inserted and held in a removably exposed state, and a through hole is formed that penetrates the mold from the deep part of the holding hole and opens to the outside.
A vacuum device is connected to the external opening end of the above-mentioned through hole, and the inserted insert part is brought into suction contact with the mold gap opening of the above-mentioned holding hole to close the holding hole opening. Formed, composed. The present invention will be described in detail below with reference to the drawings.

(Example) In Figures 1 and 2, the horizontally supported guide rod (
1) A pair of movable plates (2), (2) are supported in parallel to each other so as to be slidable in the horizontal direction.

A pair of split molds (
3) and (3) are installed, and the pair of split molds (3), (3) are opened and closed by relatively moving both rotary plates (2), (2) using a driving means such as a hydraulic cylinder. That's how it is.

In this example, in order to mold a hollow product bent in an L shape, the opposing open faces of the split molds (3) and (3) are provided with an open L-shaped bent half face (4) with both upper and lower ends open. ,(4)
are formed, and one of the split molds (3) is equipped with the insert part setting device of the present invention.

The configuration of the insert component setting device is as follows. First, the insert part used in this example has a double flange part (b) at the base of the insertion part (a) as shown in the third diagram.
This is a synthetic resin hose joint (S) having (b). The holding hole (5) for holding this hose joint (S) at a predetermined position and angle is a bent half-shaped hole (4) as shown in Figure 2.3.
) is formed as a round hole recessed into the split mold (3) member from the mold nest surface in a direction perpendicular to the opening surface of the split mold (3), and the holding hole (5) The insertion part (a) of the hose joint is formed with a diameter that allows it to be slidably inserted and removed, and a depth that allows the entire insertion part (a) to be inserted, as shown in FIG. Part (a) is formed with a dish-shaped insert part suction abutment surface (6) into which the flange part (b) can be removably fitted, and the innermost bottom surface of such a holding hole (5) Opening a through hole (7) that penetrates through the split mold (3) member and opens to the outside on the side of the split mold (3),
A flexible hose (
Connect one end of the hose (8) and connect the other end of the hose to a vacuum device (9) equipped with a vacuum pump.
) between the through hole (7) and the vacuum device (9).
) and the atmosphere (10)
Connect it.

The function of this device will be explained next along with the molding operation.

With the pair of split molds (3) and (3) in Fig. 1 open, insert the hose joint (S) into its insertion part (a) through the holding hole (
) and insert the flange part (b) into the dish-shaped suction contact surface (6
), and then when the switching valve (10) is activated and the suction action of the vacuum device (9) is applied to the holding hole (5) through the through hole (7), the flange of the hose joint (S) (b) is suctioned and pressed against the suction contact surface (6), thereby fixing the hose joint (S) at a predetermined angle and orientation, and closing the opening of the holding hole (5). Furthermore, the pressure on the flange part (b) is strengthened, and the hose joint (S
) firmly.

While continuing to fix the insert parts as described above, the pair of split molds (3), (3) are closed to form the bent mold half faces (4), (4).
), and then the parison is extruded from an extruder and lowered into the upper opening of the bent nest, and a suction action is applied into the mold nest from the lower opening of the bent nest. An air flow is generated that flows from the upper end opening through the mold cavity to the lower end opening, and the air flow conducts the parison into the bent mold cavity. After the groove, the suction action is stopped and the lower end of the parison is closed by a suitable sealing means, and then air is blown into the parison to perform blow molding. At this time, the swollen parison is welded to the flange portion (b) of the hose joint (S).

After cooling the molded product, the pair of split molds (3) and (3) are opened and the switching valve (10) is operated to communicate the inside of the holding hole (5) with the atmosphere, thereby creating a suction effect on the hose joint (S). is released, and then the molded product with the hose joint (S) is removed from the mold. The hose joint (S) can be removed from the holding hole (5) without resistance.

The vacuum device for suctioning the insert component may also serve as a vacuum device for conducting the parison into the bent cavity on the upper side.

(Effects of the Invention) According to the device for setting insert parts into a mold of the present invention, it is only necessary to apply an appropriate suction action using a vacuum device and release it, so that the drawbacks of the conventional method can be overcome. Depending on the application of the action, even if there is vibration or shock from the molding machine, the insert part can be firmly held in a predetermined position, at a predetermined angle, and in a given direction by being crimped against the contact surface, and molding can be completed by releasing the suction action. This allows the subsequent molded product to be punched out smoothly without any resistance, and its value is extremely high.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view of a pair of split molds, FIG. 2 is an enlarged sectional view taken along the line ■-■ in FIG. 1, and FIG. It is a partially omitted enlarged sectional view of the insert component set state along . S... Hose joint, 3... Split type, 4... Bent hole half surface, 5... Holding hole, 6... Suction contact surface, 7...
Through hole. Oh 5i mutual

Claims (1)

[Scope of Claims] A holding hole is provided at a predetermined position on the mold cavity surface of the mold, into which the insert part is inserted and held in a manner that it can be freely inserted and removed with a part of the insert part exposed to the mold cavity, and the said retention hole A through hole is formed that penetrates the mold from the deep part of the mold and opens to the outside, and a vacuum device is connected to the external opening end of the through hole, and a vacuum device is inserted into the mold cavity opening of the holding hole. A device for setting an insert part into a mold, the device forming a suction abutment surface that brings the insert part into suction contact and closes the opening of the holding hole.