JPH0563288B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention manufactures a molded product such as a switch component in which two thin metal inserts (two types) are stacked with a slight gap in the thickness direction. This relates to an insert mold for molding.

Structure of Conventional Example and Its Problems As shown in FIG. 1, a specific example of the conventional insert molding die is one in which a hoop 50 is inserted at the parting line to perform molding.

With this kind of configuration, it is impossible to insert-mold two hoops with a slight gap between them, and it is possible to insert two hoops (two types) stacked with a slight gap in the plane direction. In order to continuously perform insert molding of a (sandwich-shaped) molded product using hoop material, the first hoop 51 is fed into the first mold 3, as shown in a specific example in FIG. A first step 11 of molding the first insert molded product 7 in the first molding machine 5, stacking the second hoop 52 on top of the first molded product 7 and feeding it into the second mold 4, and A second step 12 of molding a second molded product (finished molded product) 8 was necessary. In such a configuration, two sets of molds, molding machines, and molding auxiliary equipment are required, and defects in the first process and defects in the second process are
Double management of defects in the process is required, and molding equipment costs are high.
There were problems with molded product quality control and molded product costs.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks and simplifies the configuration.

Structure of the Invention The insert molding mold of the present invention continuously insert molds a molded product in which two thin plate-shaped inserts are stacked with a slight gap in the plane direction using a hoop-shaped material. In the insert molding mold for performing the insert molding, both ends of the hoop-shaped material in the width direction with respect to the feeding direction to the insert molding mold,
A pair of slidable slides arranged opposite to each other on both sides of the hoop-shaped material, each having two rows of groove-like recesses for guiding each hoop-shaped material in a slidable state in the thickness direction thereof; A core, a base plate that is installed under the slide core and moves up and down while guiding the slide core, and an ejector plate that drives the up and down movement of the base plate via a connecting rod, and one step. By molding, insert molding of two hoops stacked with a slight gap can be performed, and the overall structure can be simplified, which is extremely advantageous in terms of equipment management and quality control.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 6 to 9. In the figure, 13 is a lower hoop, 14 is an upper hoop, and 15 is a lower hoop 1 on the front part.
3 and a groove-like recess 31 that guides the upper hoop 14,
16 is a left slide core facing the right slide core 15 and provided with groove-shaped recesses 31 and 32 for guiding the lower hoop 13 and upper hoop 14; 17 is a first mold insert , 18 is a first positioning pin that is installed in the first mold insert and positions the upper hoop 14 in the feeding direction, 19 is a second mold insert, and 20 is installed in the second mold insert. ,
A second positioning pin that positions the lower hoop in the feed direction; 21 is a base plate that guides the right slide core 15 and left slide core 16; 22 is a base plate 21 and an ejector plate 23;
24 is the right slide core 1.
5. A spring for pushing the left slide core 16 backward when the mold is opened; 25 is an ejection pin; 26 is a spring that pushes the connecting rod 22 when ejecting, and the base plate 2
1, right slide core 15 and left slide core 1
6 to push up the molded product a certain distance from the tip 61 of the protruding pin 25.

A lower hoop 13 is provided on the front surface of the first slide core 15 and the second slide core 16, respectively.
A groove-like recess 32 for inserting the upper hoop 14 and guiding the slide, and a groove-like recess 31 for inserting the upper hoop 14 and guiding the slide,
Further, the tip portion 33 is formed with a surface that forms part of the side surface of the molded product 29 during molding. Furthermore, a dam block 35 is provided on the end surface of the first mold insert 17.
is formed, and the second hoop 14 can be sandwiched between the flat surfaces 34 of the right slide core 15 and the left slide core 16 without causing resin leakage during molding. Furthermore, the second mold insert 19
A dam block 36 is formed on the end face of the
The first hoop 13 can be sandwiched between the flat surfaces 35 of the right slide core 15 and the left slide core 16 without causing resin leakage during molding. Further, when the mold is opened, the right slide core 15 and the left slide core 16 are moved outward by the spring 24, and each slide core tip 33
Since a slight gap 39 is formed between the lower hoop 13 and the side surface of the molded product 29, the molded product will not be damaged even when the lower hoop 13 and the upper hoop 14 are pulled and fed. In addition, since the lower hoop 13 and the upper hoop 14 sandwich the left and right slide core tip convex portions 37, the hoop can be fed in a horizontal state without sagging, and feeding accuracy can be improved. be.

Effects of the Invention As described above, in the present invention, insert molding is performed with two hoops with a slight gap inserted into two rows of groove-shaped recesses formed on the front surface of the slide core. , one-step molding is possible, the number of molds, molding equipment, etc. can be halved, the overall configuration can be simplified, and it is easy to use in terms of equipment management and quality control.
It is extremely advantageous. Furthermore, since the protrusion at the tip of the slide core is sandwiched between the two hoops, it also has the effect of improving the feeding accuracy of the hoops.

[Brief explanation of the drawing]

Figure 1 is a partial sectional view of a conventional insert molding die, Figure 2 is a front view showing the entire conventional molding equipment,
Fig. 3 is a perspective view showing a completed insert molded product, Fig. 4 is a sectional view of a conventional completed insert molded product, Fig. 5 is a sectional view of a conventional first step insert molded product, and Fig. 6 is a sectional view of a conventional insert molded product of the present invention. FIG. 7 is a cross-sectional view showing the insert mold in the closed state in one embodiment, FIG. 7 is a cross-sectional view showing the mold open state, FIG. 8 is a partial cross-sectional view showing the tip of the slide core, and FIG. 9 is the same. FIG. 3 is a perspective view showing the mold in an opened state. 13...Lower hoop, 14...Upper hoop, 15...
...Right slide core, 16...Left slide core, 3
1, 32...Groove-like depression, 37...Protrusion.

Claims (1)

[Claims] 1. An insert molding mold for continuously insert-molding a molded product in which two thin plate-like inserts are overlapped with a slight gap in the plane direction using a hoop-shaped material, wherein the hoop Two rows of groove-like recesses are provided at both ends in the width direction with respect to the feed direction of the hoop-shaped material to the insert molding die to make each hoop-shaped material slidable and to guide the hoop-shaped material in the thickness direction. a pair of slidable slide cores that are arranged opposite to each other on both sides of the hoop-shaped material; a base plate that is installed under the slide cores and that slides and guides the slide cores and moves up and down; An insert molding die having an ejector plate that drives the vertical movement of the base plate through a rod.