JPS60183111A - Molding die with slide core - Google Patents

Abstract

PURPOSE:To make an accurate insert molding inspite of slippage out of place, distortion of a metal insert by providing a slide core so that it approaches from the inclined direction to the metal insert held on the mold body. CONSTITUTION:This equipment is composed of the movable mold 2 having a sleeve pin 4 and a core pin 5 and the fixed mold 1 having a push pin 6 and a slide core 3 that can approach to a metal insert 8 from the inclined direction. The movable mold 2 is moved downward, the metal insert 8 is fitted to the core pin 5 and held by the push pin 6, the slide core end 3a is approached to the upper surface of the metal insert 8 from inclined upper direction and both molds 1, 2 are clamped to inject material. Though the metal insert 8 is slipped out of place or distorted, the metal insert 8 can be moved precisely to the specified position and securely molded. The metal insert 8 is not injured by the core end part 3a.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an improvement of a mold having a slide core.

In plastic molded products such as assist grips, many molds are used in which a slide core is installed close to the insert in order to satisfy the product shape.

[Prior art] Conventional molds with slide cores are generally movable molds,
A cavity is defined by at least two mold bodies, such as fixed molds, that are relatively movable in one dimension, and a slide core that is slidably held in the mold body. The slide core is slidable in a direction substantially perpendicular to the direction of relative movement of one mold body.

Figures 3 and 4 show cross-sections of the main parts of the mold that holds the slide core for manufacturing conventional assist grips.
A fixed mold 101 and a movable mold 102, which constitute the mold main body,
A slide core 103 held on the upper surface of the movable mold 102 so as to be freely openable; a 1-sleeve bin 104 held by the movable mold 1 () 2 for extruding the molded product; a sleeve core pin 105 disposed coaxially with this sleeve pin; A presser pin 106 facing the sleeve core pin 105 and slidably held by the fixed mold 101, and a slide core 103
The tilting bin 107r is configured to drive a tilting bin 107r. At the time of mold clamping, the in-1 notebook metal fitting 108 is guided to the sleeve pin 105 and is gently fixed to the mold surface of the movable mold 102 with a C presser pin 106. In this state, the movable mold 102 is transferred upward. By this transfer of the movable mold 102, the slide core 10
3 also moves upward at the same time, and simultaneously moves to the right in the figure on the upper surface of the movable mold 102 by the tilting bin 107. When the mold clamping is completed, the state is shown in FIG. 3, and the gap Δ is defined.

In this conventional mold, the tip 1 of the slide core 103
03a and the insert 1 to the metal fitting 108, a gap is formed as shown at 8 in FIG. Because the pressing force of 106 is weak, etc., the insert fitting 18 is not connected to the movable mold 10.
If the insert fitting 1 deviates from the predetermined position of the mold body 102, or if the insert fitting itself is distorted, the insert fitting 1 held in the sleeve core bin 105 of the mold body 102
08 is pinched between the slide core 103 and the tip 103a of the slide core 103 is damaged.

[Objective of the Invention] The present invention overcomes and overcomes the above-mentioned problems, and is intended to solve problems such as cases where the insert metal fitting held in the mold body is displaced from a predetermined position, or where the insert 1 - the metal fitting itself - is slightly distorted. It is an object of the present invention to provide a mold having a slide core in which an insert metal fitting is not held between the slide core and a sleeve core bin even in the case of the slide core.

[Summary of the Invention 1 The mold having a slide core of the present invention has a structure in which the slide core is held by the mold body so as to be slidable in a direction inclined with respect to the direction of relative movement of the mold body by at least 2 gI. The tip of the slide core is characterized in that it approaches the metal fitting held in the mold body from an inclined direction.

In the mold having a slide core of the present invention, the slide core approaches the insert 1 to the metal fitting from an oblique direction. Therefore, the position of the C insert metal fitting may shift,
Even if the insert 1~ metal fittings are distorted, the in'J-1~ metal fittings will not be pinched between the slide core and these three 1 core pins during the sliding of the slide core. There are cases where the slide core and the inserter 1 and the metal fittings come into contact with each other. The inlet metal fitting is moved to a predetermined correct position by the pressure, and the tip of the slide tip 7 is prevented from being scratched by the insert metal fitting. This results in a mold with a slide core that enables stable production with fewer problems during molding.

1 Detailed explanation of the structure of Komei J Constituting a mold having a slide core of the present invention
The mold bodies of J-type molds, fixed molds, etc. are basically the same as the mold bodies of conventional split molds such as injection molding. In the mold of the present invention, the insert 1 to the metal fittings are held in at least one mold body.
No. 1 - The upper surface of the metal fitting faces the direction of relative movement of the mold body. The slide core holds the insert 1 to the metal fittings and is held movably in the mold body, and its slide 1lII7
The 'i direction is a direction inclined with respect to the direction of relative movement of the mold body.

The shape of the chitobite formed by the mold body and the slide-I can be variously shaped depending on the application.

Slide: The degree of inclination between the I-ar and the mold body that holds the slide core is 45~45 mm with respect to the relative movement direction of the mold body.
Preferably, it has a temperature of 75 degrees. J3. The degree of inclination of this slide core 1 is such that the tip of the slide core of the inlay 1 metal fitting that is inset in the mold body approaches the surface at an angle of about 10 to 45 degrees. is preferred.

The sliding of C on the mold body on one side of the slide core is mechanically driven by a slide bin using the relative movement of the mold body.
The mold having a slide core of the present invention is mainly used as a mold for index molding.
C can be used, but it can also be used as a mold for compression molding, lance core molding, etc.

[Effect of the invention 1] In the mold of the present invention, which has a slide core on the right side, the sliding direction of the slide core and the mold body that slidably holds and covers the slide core and the slide core is inclined with respect to the relative movement direction of the mold body. The tip of the slide core approaches the insert 1 to the metal fittings inserted in the mold body from an inclined direction. Therefore, no interference occurs between the tip of the slide core and the inlet metal fitting. Even if the tip of the slide core and the insert 11-1 come into contact with the metal fittings, the contact will occur just before the sliding of the slide core is completed, and the movement of the slide nifter will cause the insert 1 to the metal fittings to reach a predetermined position d. Pressed by Therefore, problems such as the insert fitting being squeezed between the slide core and the sleeve core bin do not occur. Therefore, stable molding is possible by using the mold having the slide core of the present invention. Furthermore, since it is no longer necessary to provide a gap B unlike in conventional molds, it is possible to partially expose the insert fitting depending on the application.

[Example] FIGS. 1 and 2 show a cross section of a main part of a mold for holding a slide core of the present invention on the right side. Note that Fig. 11 shows the state in which the fixed mold 1, movable mold 2, and slide core 3 constituting the mold main body are driven to a predetermined mold clamping position, and the groove A is formed. 1° shows a state in the middle of sliding with respect to the movable mold 2. This mold consists of the fixed mold 1 which forms the mold body 4', and the movable mold 812.
, a slide core 3, a sleeve bin 4, a sleeve core bin 5, a presser bin 6, and a hydraulic device 7 for driving the slide core 3.

The slide core 3 has an inclination angle (
θ) The inner fitting 8, which is held slidably on a sliding surface inclined at 15 degrees, is made of metal with a substantially S-shaped cross section and has a through hole to be inserted into the three 1 core=bin 5. It is 6. The through-holes of the inserter 1 to the metal fitting 8 are inserted into and guided by the slide core pin 5, and are pressed into the movable mold 2 by the presser pin 6. II is kept constant. The slide core 3 is fixed to the tip of a piston 71 of the hydraulic device 7 and driven.

As shown in Fig. 2, this mold is constructed by attaching the in 1 no. , drives the piston 71 of the hydraulic system H7, and scoops 1-2.
The horn 3 is moved along the driving surface 1, and the slide core tip 3a approaches the top surface of the insert 1 to the metal fitting 8 from diagonally above. After driving the slide core 3 to a predetermined position, the movable mold 2 is sent upward and comes into contact with the lower surface of the fixed mold 1, resulting in the retracted state shown in FIG. In this state, cavity A
A resin molded product is obtained by inserting the resin into the inserter and cooling it in the inserter.

In the mold having the slide core of this example,
The distal end portion 3a of the slide core 3 approaches the lower surfaces of the inserter 1 to the metal fitting 8 from diagonally above.

For this reason, even if the insert metal fitting 8 floats on the upper blade and comes into contact with the slide core tip 3a, the insert metal fitting 8 will not touch the slide core tip 3a.
a, the insert 1 to the metal fitting 8 are returned to their predetermined positions, and the insert metal fitting 8 is not compressed between the slide core 3 and the sleeve core bin 5. For this reason, the slide core 3 is not damaged, and an injection molded product having the predetermined inserts 1 to metal fittings 8 can be obtained.

[Brief explanation of drawings]

Figures 1 and 2 show the main parts of a mold that has a slide core according to an embodiment of the present invention. 1, a sectional view of main parts showing a state in which the slide core is in the middle of sliding against the mold, and FIGS. 3 and 4 show a mold having a conventional slide core,
Figure 3 shows the mold in a normal state! I
FIG. 4 is a cross-sectional view of the main part showing the state when the slide core is moved with the insert metal fitting shifted from the predetermined position. 1... Fixed type 2... Movable type 3... Slide core 4... Sleeve bin 5...
Sleeve core bin 6... Presser bin 7... Hydraulic pressure "J"
t im e... Insert Gold Patent Applicant Toyoda Gosei Co., Ltd. Agent Patent Attorney Hirodo Patent Attorney Shudo Fujitani Patent Attorney Akio Maruyama

Claims (1)

[Claims] (1) At least two mold bodies, such as a movable mold and a fixed mold, are moved in one dimension, and a slide core is slidably held in at least one of the mold bodies. In the mold in which the inner gold p is held in the cavity 1, the slide core is held in the mold body so as to be slidable in a direction inclined with respect to the direction of relative movement of the mold body. Then, the tip G of the slide core
, 1 - 1 - A mold having a slide core, characterized in that the metal fitting is approached from an llr + oblique direction.