KR910007788Y1 - Clamping device for injection molding machine - Google Patents

Abstract

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Description

Switchgear for injection mold

1 is an exploded perspective view of the present invention.

A and b in Figure 2 is a cross-sectional view showing the operating state of the present invention, a is a state at the time of mold closing, b is a fully mold state.

3 is an exemplary view showing a state of use of the present invention.

* Explanation of symbols for main parts of the drawings

1: opening and closing opening 2: upper fuselage

3: lower body 4: working hole

5 inclined surface 6 semicircular recess

7, 7 ': locking piece 8: pin

9: spring stop 10: compression spring

11: cover plate 12: countersunk bolt

13: square hole 14, 14 ': locking pin

15, 15 ': Positioning pin hole 16, 16': Fastening hole

21: Senate 22: House of Representatives

The present invention facilitates the separation of the injection product and the molded product solidified in the runner part at the beginning of mold by forming the upper and lower plates of the synthetic resin injection mold, and strengthens the binding force between the upper and lower plates in mold closing. An injection mold switchgear is provided.

Conventional injection mold opening and closing device is to install a compression spring and a semi-circular ballet piece on both sides of the fuselage installed in the lower plate, and to control the compression force and the like as a control bolt to be combined on both sides of the fuselage, the semi-circular ballet piece is inserted into the upper plate In order to be able to easily insert and remove molds and molds by inserting semi-circular grooves on both sides, the assembly process is complicated by the large number of parts and the assembly process is complicated, which increases the cost of the product. There were many shortcomings, including many problems in the manufacturing process.

Therefore, the present invention has been devised in view of the above-mentioned drawbacks, and in particular, by simplifying the number and structure of parts, it is easy to manufacture and easy to assemble, and thus the injection mold opening and closing device can avoid the cost reduction. The purpose of the present invention will be described in detail below with reference to the accompanying drawings.

The upper and lower bodies (3) and the opening and closing hole (1) installed in the upper mold plate (21) and the lower plate (22) of the injection mold are formed, and the upper body (2) has a working hole (4) inside. ), The engaging pieces 7 and 7 'having the inclined surface 5 at the lower side and the semicircular recess 6 at the upper side thereof are formed by pins 8 on both sides of the operating hole 4, and On top of the engaging pieces 7 and 7 '. A spring-shaped spring 9 is formed to support the compression spring 10 having a very good elastic force on the spring 12, and a cover plate 11 on the upper surface of the upper body 2. And a semi-circular recess 6 formed in the engaging pieces 7 and 7 'on the upper side of the square hole 13 by drilling a square hole 13 therein. The pins 14 and 14 'are fastened so that the upper body 2 and the lower body 3 have positioning pin holes 15 and 15' and fastening holes 16 and 16 '. It is to form an opening and closing device for injection mold.

Reference numeral 23 denotes an upper fixing plate, 24 a stripper plate 25, a support plate 26, a leg 27, and a fixed plate.

Referring to the operation and effects of the present invention configured as described above are as follows.

If the upper body 2 is attached to the upper plate 21 and the lower body 3 is fixed to the lower plate 22, the mold is closed and the lower portions of the locking pieces 7 and 7 'are fixed as shown in FIG. When the inclined surface 5 formed in the lower body 3 is connected to the outer peripheral surfaces of the locking pins 14 and 14 ', the locking pieces 7 and 7' are opened on both sides, and the locking Formed on top of pieces 7 and 7 '; When the spring spring section 9 forces compression of the compression spring 10 and the inclined surface 5 of the locking pieces 7 and 7 'is completely out of the locking pins 14 and 14'. The semicircular recess 6 is caught by the catching pins 14 and 14 'while returning the stiffening pieces 7 and 7' to their original position by the elastic force of the compression spring 10 that has been compressed. In the mold opening, the semi-circular recess 6 is separated from the locking pins 14 and 14 'according to the mold opening of the mold.

That is, the semicircular recesses 6 formed on the engaging pieces 7 and 7 'are maintained in a complete ring shape by the compression spring 1 before they are coupled to the lower body 3, but once the locking pins 14 And (14 '), if the mold is released at a strong pressure by the gap between the catching pins 14 and 14', the locking piece 7 and the sliding outer periphery of the catching pins 14 and 14 'are slid. (7 ') comes out.

As described above, the present invention is simple and easy to manufacture, as well as extremely easy to assemble, no failure, and the unit price is low, it is a very useful design if widely spread in the injection industry.

Claims (1)

In the upper and lower bodies 3 and 3, the upper and lower bodies 3 are formed in the upper and lower bodies 3 of the injection mold upper and lower plates 21 and 22, respectively. 4) and the locking pieces 7 and 7 'having the inclined surface 5 on the lower side and the semicircular recess 6 on the upper side of the operating hole 4 are formed with pins 8, and A spring stopper 9 is formed on the top of the engaging pieces 7 and 7 'so that the spring stopper 9 holds the compression spring 10 with a very good elastic force, and is placed on the upper body 2 upper surface. The cover plate 11 is fixed as a countersunk head bolt 12, and the lower body 3 is drilled with a square hole 13 therein so that the engaging pieces 7 and 7 are placed on the upper side of the square hole 13. The locking pins 14 and 14 'are arranged so that the semicircular recesses 6 formed in the') are caught, and the upper and lower bodies 3 and 3 have positioning pin holes 15 and 15 ', respectively. Injection molding, characterized in that to form a fastening hole (16) and (16 ') Mold switchgear.