JPS5865641A - Gate cutting structure of mold - Google Patents

Abstract

PURPOSE:To push up a gate cutter pin when molds are opened so as to cut automatically the gate simultaneously with the mold opening, by providing the gate cutter pin slidably in the movable mold. CONSTITUTION:When the tip of the gate cutter pin 6 is abutted on the stationary mold 2 and the gate cutter pin 6 is pushed down against the spring 16, a large diameter section 12 and a stopper section 17 of the upper part of a recess 13 form a space alpha. After the injection of resin, and the molds are opened, the downward force of the gate cut pin 6 is released, and the gate cut pin 6 is strung by the spring 16 to cut automatically the gate 5 from the molded item (a).

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention mainly relates to a gate cutting structure in a molded metal layer that can automatically cut a side gate, and more specifically, a movable side mold (! ) and the molded product (shoes) can be moved when the lid 11 creases! ! In the 9-molded metal frame, which is configured to be left on the IN side, the fixed side excess (
Form a runner (4) and a gate (-) on the mold opening surface 13) of 1) and movable side metal cap), and slide the gate cut pin (-) into the machi-meki a1 cap). It is movable, and the gate cutter (-) is biased by the elastic body (7), and the tip of the gate cutter J (-) is attached to the gate (6) or the runner (4) near the gate (6). The molten resin is biased eccentrically into each of the molten resin passages and biased, forming a Todoroiso part (ro) that comes into elastic contact with a certain amount of metal and m113 at the tip of the gate cut beef i@), and #1llll1411 with (-) in contact with the fixed side gold plate 11)
This invention relates to a gate cutting structure in a molding die formed by forming a resin passage (@) through which a resin material can pass.

The purpose of this book 9hqI4 is to extend the life of a gate-opening structure in a molding die that can automatically cut a gate such as a side gate at the same time as it opens, with a simple improvement. . 'Embodiments of the present invention will be described in detail below with reference to the drawings.

+11 is a constant side mold, and in contrast to this constant side mold (1), a movable side mold (configured so that the door can be opened by cutting the illusion) and a movable side mold (fixed side fill) are used. The nozzle of the injection molding machine (not shown) is formed along the open side surface fil that comes into contact with the movable cylinder metal on the side (1). A runner (4) is formed that can communicate with the runner (4), and the part where the - mark communicates with the runner (4) is a fixed -
Money! Possible mll money m+ for 1111! I opened the l and when it was nine, was it inside? This allows the molded product (a) in the movable metal fitting (I1) to remain in the center of the movable metal plate (Ill) by means of a screw-out technique (not shown) or the like.

The gate cut vinyl Jill has a through hole (10) that can be slid freely through the hole (11).
411 is a large diameter part (Ill), which opens toward the 5th diameter part (4) near the gate (6). Possible I!b1
It is inserted into the recess Il field formed on the back side of the 1-kin plate (!). The thickness 1 is a recess (1'40m and above all, it is 4 lower. Possible - your meeting 1! Ii Ill has a hardened plate I attached, and the recess m- of the hardened plate 041 is Elastic body inside (1)
- Insert slurry sign IIf4 as an example. As a result, the slurry contacts elastically with the large diameter g of the gate cut pin (-), forcing the tip of the gate cut pin (-) to protrude from the cap. At the tip, a part of the runner 14) near the gate fIl of the fixed side joint gfl) is caught, and l! The contact part (4) can be attached to the fixed side mold (1).
@).

As shown in Fig. 3, the opening of the through hole (11) is aligned one core with respect to the center line (6) of the runner (4) near the gate (1) when viewed from above. , Todoroki II Kure (Hata) of Gate Gatsutobini 7m was on the fixed side of runner 14) 4 minutes on the fixed side gold Jilt 凰) ii minutes near gate (s), and gate cut vinyl / (・) was up to aIs brutal side 18) It is lowered to form a resin channel (-) in the runner (4) portion through which the resin material can pass. Then, the tip of the gate cutter (6) comes into contact with the fixed side mold (ri), and the gate cutter (16)
A gap (b) is formed between the thick m si am and a portion of the stopper on the upper surface of the recess U field in a state in which it is pushed down against the @. In the figure, - is the runner lock, and 4 is the runner ejector.

According to such a configuration, as shown in Fig. 2, the (41F) force of the gate cut pin (・) is released and the gate cut pin (@) is slurried. ri0
From time to time, it explodes, and the molded product (Hata) becomes goo) -+lil
It automatically disconnects. In such a case, as shown in Fig. 2, the runner (4) remains on the side where the runner (4) is not twisted, and the runner (4) is not twisted.
(It is possible to reliably cut the Il. After that, by pushing up the 5-sinner ejector piston, the cut runner gate is ejected.

In summary, the present invention provides a gate cutter to be slidably movable on the movable side reinforcement, biases the gate cutter with an elastic body, and connects the tip of the gate cutter to the gate, which is a part of the runner near the gate. Insects 4i are biased eccentrically to the molten resin passage portion and forced into the fixed side mold at the tip of the gate cut pin! The layer in which the part is in contact with the stationary side mold forms a passageway through which the #I melted resin material can pass, so when the door is opened, the IT- The advantage is that the gate cutter is pushed up by the restoring force of the elastic body against the gate and runner parts of the molded product remaining in the molded part 11i, and the gate can be cut by itself at the same time as the AT connection. be.

The simple a@a1 diagram and 1lIIt2dlJ in Figure 1 are cross-sectional views showing the operation of the present invention, and Figure 43 is a flat rIi diagram showing the relationship between the gate cutoff and the 5th angle, and (1) is constant. Side mold, (
! ] is the town-Yujinshi, (S) is the m-related surface, (4) is the runner, Ill is the gate, (-) is the gate cut pin, ()
) is the elastic body, (L) is the 1 part, and IS) is the eccentric passage.

1 Patent Attorney: Ishi 1) Choshichi

Claims (1)

[Claims] 11) The movable side mold is opened from the fixed side mold and the molded product is left on the movable side mold side. A runner and a gate are formed along the opening surface, a gate cut pin is slidably provided on the movable mold, and the gate cut pin is biased with an elastic body so that the tip of the gate cut pin is attached to the gate 4. Alternatively, a portion of the runner near the gate is biased and biased toward each molten resin passage so that the tip of the gate cut pin elastically contacts the fixed side reinforcement. A gate cutting structure in a molding metal plate, in which a resin passage through which a molten resin material can pass is formed by a soft wire whose part is in contact with a fixed side metal lid.