JPS5931133A - Molding apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a molding device that is equipped with an arbitrary timing type ejector pin that allows easy replacement and inspection of the cavity block.

Mold equipment commonly used in transfer molding
In Q, the mold group 1 [5 type is placed in the cavity and the molded product is placed in the so-called ejector bin 7 and taken out from the cavity block.For this reason, in this type of molding equipment, the In addition, the ejector bin was constructed separately. 1 Nitsutoke is installed and a molded structure is adopted. However, in this jff/h'Z, changes in the specifications of the molded product
When changing cavidy flock with VC,
The ejector pin unit also has to be replaced according to the configuration that is combined with this, and therefore it is necessary to use many types of ejector pin units depending on the type of molded product. As your score increases, you will be asked more questions.

For this reason, the inventor of the present invention has constructed a unit that is integrated with the extractor bin and the cavity block, thereby reducing the number of parts lost and wasted for many types of molded products, and facilitating the removal work when modifying the cavity block. We have previously proposed a molding device with However, this molding device has a structure that uses a spring to automatically operate the ejector pin in the Nl type in the bullet-loaded shock absorbing block, so the ejector pin can be operated at any timing. There is a problem that if you want to use this structure, you can only use the 11th ori of this structure.

Accordingly, an object of the present invention is to provide a molding device equipped with an ejector pin of an arbitrary timing type, which is capable of reducing the number of parts and facilitating replacement work.

In order to achieve this objective sound, the invention is to provide seven ejector pin body plates so as to be movable relative to the mold plate to which the entire cavity block is attached, and to drive this ejector pin, an ejector pin holder 2 is detachably attached. It consists of

Hereinafter, the present invention will be explained with reference to illustrative embodiments.

Fig. 1 shows an example in which the present invention is applied to a molding device for a full transfer mold. It is now possible to do so. An upper mold die 3 and a lower mold die 4 are fixedly installed on the upper platen 1 and the lower platen 2, respectively.
These upper and lower mold molds 3 when 2 are approached vertically
．． Mold forming can be performed within 4 hours. The upper mold 3 has an upper mold plate 5 fixed to the upper platen 1 and an upper cavity block 6 attached to the upper mold plate 5, and the lower mold 4 received was fixed to the lower platen 2. It has a lower mold plate 7 and eight lower cavity blocks attached to the lower mold plate 7, and these upper and lower cavity blocks 6.8 constitute the entire cavity.

Next, the defects of the upper mold 3 and the lower mold 4 will be explained. Note that the upper mold die and the lower mold die are almost vertically symmetrical, so in FIG. 2, only the lower mold die 4 is omitted and explained. The plate 7 is integrally fixed on the lower platen 2,
This lower mold plate 7 has a gap 9 passing through it in the lateral direction, and an ejector bin drive plate 10 is mounted inside the gap 9 so as to have some clearance in the vertical direction. This ejector bin drive *b plate 10 is fitted into a vertical guide rod 11 installed upright on the lower platen 2 of the lower platen 2, while the other side is connected to the drive shaft 14IC of the ejector pin IMRjh cylinder 13 fixed to the lower platen 2. connected, and by this cylinder 13 the front ■
The pipe is moved up and down within the gap 9. The ejector bin drive plate 10iJ: A stud bolt 15 planted from below the lower mold plate 7 is loosely inserted, and a coil spring 16 elastically loaded on the stud bolt 15 causes the ejector bin drive plate IO to move upward. The biasing type yt is turned towards the direction. Furthermore, connecting rods 18 are inserted into vertical holes 17 and 17 formed in the lower die plate 7 at a plurality of locations (two locations in the figure) on the upper surface of the ejector bin drive plate 10.
The upper ends of these connecting rods 18, 18 are flush with the upper surface of the lower mold plate and protrude.

On the other hand, the lower/r milling floc 8 attached to the upper mold & 7 has cavities 20, 20 and runners 2 on its upper surface.
1 Completely form the cavity tape and fix it) 22.
22, it is fixed to the removable TiJ function at its JiId side. This cavity block 8 forms 23 spaces on the lower rR1 side, and this space 23 and the cavity 2
0.20, bottle insertion hole 24.24 that fully communicates with the runner 21
．． 24'i form. Also,.

At the periphery of the space 23, holes 25 and 25 are formed for ejector bin holder fixing bolts 27, which will be described later.

An ejector bin holder 262 &! is located in the space 23 at the position J of the lower template 7. and fix it to the upper end of said connecting rod 1.8.18 by means of the ejector bin holder fixing bolt 27.27. Further, the upper surface of the ejector bin boulder 26 is provided with the bin insertion hole 2.
Ejector bin 28.28 inserted into 4.24.24
．． ．． 28f: Erected.

According to the above configuration, the ejector pin drive plate 10 is always urged upward within the gap 9 by the elastic force of the coil spring 16, but the cylinder 13 is always in the +0 contracted state and the ejector pin drive plate 10 Keep it in the fully downward position. As a result, the ejector bin holder 26 is also in the lower position and the ejector bins 28, 28, 28 are placed in the cavity 2.
It is retractable from 0.20 and runner 21. In this state, the upper platen 1 moves downward and the upper and lower cavity blocks 6
．． 8 and pressurizes the resin into the runner 21, the resin passes through the launch and fills each cavity 20.
Can be molded into 7yr fixed molded products.

After the molding is completed, the upper platen 1 is moved to the upper carrier.

The pipe tap 6 moves upward, opening the cavities 20 and 20 of the lower cavity block 8 and the runner 21. Then, the cylinder 13 moves upward to the drive)lii14,
Combined with the biasing force of the coil spring 161C, the ejector bin JIX moving plate 10 can be felt to move in one direction. Therefore, the connecting rods i, s, is and the ejector pin holder 26, which are integral with the rods, also move upward, and the ejector bin 28.28.2B
The molded product and the runner protruding into the runner 21 and existing therein are released from the lower cavity block 8.

After demolding, the cylinder 13 is actuated to move the drive shaft 14 downward, and the ejector bins 28, 28, 28 are retracted from the cavity 20, 20 and the runner 21. Note that the same applies to the upper mold 3.

On the other hand, when changing the lower mold 4 together with the upper mold 3 when changing the cavity block, first loosen the cavity block fixing bolts 22, 22 and remove the lower cavity block 8 from the lower mold plate 7. Next, loosen the ejector pin holder fixing pin 27.27'i and attach the ejector pin holder 26 to the connecting rod 18.18.
That is, it can be removed from above the lower mold plate 7. Then, fix the ejector pin holder to the connecting rods 1B and 1B using different types of ejector pin holder bolts, and use the lower cavity block fully fixing bolts corresponding to the bolts 11 on the lower mold plate 7 (K).
If jM is completed, the change (conversion) of the lower mold 4 can be completed. The same applies even if there is one in the upper mold type 3.

Therefore, with this configuration, the mold type can be changed simply by operating the respective fixing bolts 22, 23 of the cavity block and ejector bin holder, making the construction extremely easy. In addition, when changing the mold type, it is only necessary to prepare a corresponding cavity block, a corresponding ejector bin, and an ejector bin holder according to the type of molded product. Compared to a system in which the bottle holder, template, etc. are each configured as separate units, the number of parts to be prepared can be reduced, and this is also effective in reducing the cost of the device.

Here, the present invention is not limited to the previous HC embodiment; for example, the coil spring 16t may be interposed between the ejector bin holder 26 and the lower cavity block 8.

As described above, according to the molding apparatus of the present invention, the ejector pin drive plate is provided so as to be movable relative to the template for holding the cavity block, and the ejector pin holder is detachably attached to the drive NbFi. As a result, it is possible to drive the ejector pin with the best λ and timing, and when changing the mold type 1, it is only necessary to replace the entire capity block and ejector pin holder, which allows the 5F of the mold type to be : It is possible to easily exchange for cash, and the number of parts θ required for replacement can be reduced.

[Brief explanation of drawings]

FIG. 1 is a side jfu view of a fully stopped configuration of the molding apparatus of the present invention, and FIG. 2 is a detailed [I, lr side view] of the lower mold. l... Upper platen, 2... Lower platen, 3... Upper mold mold, 4... Lower mold mold, 7... Lower mold plate,
8...Lower capacity block, IO...Ejiekkupin J cap ljt plate, 13...Cylinder, 18...Connecting gland, 20...Cavidy, 21...
・Runner, 22...Cavity block fixing bolt,
27... Ejector bin holder fixing bolt, 28...
- Yu, diectapine. 1st figure 3

Claims (1)

[Claims] 1. A cavity block metal is attached to a mold plate integrated with the platen, and an ejector bin driving plate VC that is moved by a cylinder means is provided on this mold plate so as to be relatively movable,
A molded device characterized in that an ejector bin holder supporting an ejector bin provided behind the cavity block is removably attached to the ejector pin drive plate! . 2. The ejector bin drive plate has a connector that can be inserted through the mold plate and protrudes from the entire surface of the mold plate at one end! and the ejector bin holder is attached to one end of the connecting rod, the cavity block is bolted to the template surface,
3. The molding apparatus according to claim 1, wherein the ejector bin holder is bolted to the connecting rod at the second side of the mold plate tvc.