JPH0321420A - Mold for molding - Google Patents

Abstract

PURPOSE:To enable taking out of molding parts and a cold runner by separating them form each other, by a method wherein a runner moving part moves a runner holding part together with the cold runner along the surface of a template and a runner extruding part separates the cold runner from the runner holding part. CONSTITUTION:A rubber holding part 7, runner moving part 8 and runner extruding part 9 are provided on a movable side template 6. Upon breaking of a mold, the rubber holding part 7 is positioned at a grasping point (a), the template 6 is moved backward, a cold runner 2 is extruded through the template 6 with an extruding pin 32 and a molded molding parts are extruded for dropping. However, the rubber holding part 7 positioned at the grasping point (a) grasps at a part of the cold rubber 2. Then after a movement of the runner holding part 7 to a separating point (b) from the grasping (a) along with the cold runner 2 by actuating the runner moving part 8, the cold runner 2 is separated from the runner holding part 7 by actuating the runner extruding part 9 and the cold runner 2 is dropped to a different position separated from the molding parts.

Description

[Detailed Description of the Invention] [Summary] The present invention relates to a mold that has a fixed side template and a movable side template and gives an impressive shape to a molded part, without requiring expensive equipment or space for installing it.
In order to provide a molding die in which a molded part and a cold runner can be separated and taken out, at least one of the fixed-side template and the movable-side template is provided with a runner holding part, a runner moving part, and a runner extrusion part. The runner holding part located at the gripping point a grips a part of the cold runner extruded from the template, and the runner moving part moves the runner along the surface of the template. The holding part is moved together with the cold runner from the gripping point a to the separation point b, and the runner pushing part is configured to separate the cold runner from the runner holding part at the separation point.

[Industrial application field]

The present invention relates to a mold having a fixed side template and a movable side template for molding a molded part, and more particularly to a molding die from which a molded part and a cold runner can be separated and taken out after molding.

In recent years, mold parts and cold runners are automatically separated when the movable mold plate is retracted and the mold is opened, as a means to facilitate the separation of mold parts and cold runners after molding. Separation means such as the so-called submarine gate method are widely used.

However, when the mold is opened, the mold part and the cold runner are extruded at the same time, so a process of separating the mold part and the cold runner is required after a certain molding process. Therefore, it is desired to realize a molding die that allows the mold parts and cold runners to be dropped to different positions and that allows the mold parts and cold runners to be separated and taken out.

[Conventional technology]

FIG. 3 is a perspective view showing an example of a molded part, FIG. 4 is a view showing an example of a conventional molding die, and FIG. 5 is a schematic diagram showing an example of a conventional sorting means.

When the mold is opened after filling the mold with resin and cooling it, the mold part 1 and the cold runner 2 are extruded from the mold as shown in FIG. There is a gate part 21 between the mold part 1 and the cold runner 2. For example, in a submarine gate type mold, the boundary between the mold part 1 and the gate part 2l is automatically cut when the mold is opened.

As shown in FIG. 4(a), the conventional mold immediately after being opened (only the movable mold plate is shown to simplify the figure), has mold parts 1 and cold on the surface of the movable mold plate 3. A runner 2 is installed inside the movable mold plate 3 as shown in the A-A cross-sectional view of FIG. 4(b). Extrusion pins 31 and 32 are provided which automatically protrude and extrude the molded part 1 and the cold runner 2, respectively.

In such a mold, the molded part 1 and the cold runner 2 fall at the same position after forming, and it is necessary to separate the molded part 1 and the cold runner 2 using the means shown in FIG. 5, for example. The sorting means shown in FIG. 5(a) consists of a first belt conveyor 4l and a second belt conveyor 42, and the molded parts 1 are placed at the connection part between the first belt conveyor 4l and the second belt conveyor 42. A gap 43 through which the cold runner 2 cannot pass is provided.

Therefore, the mold part 1 and the cold runner 2 that have fallen to the same position are carried by the first belt conveyor 4l, and the mold part 1 falls through the gap 43. Moreover, since the cold runner 2 cannot pass through the gap 43, it is further carried by the second belt conveyor 42, and the molded part 1
is deposited at a different location away from the location where it was deposited.

Further, the sorting means shown in FIG. 5(c) has a robot 5 for moving the cold runner 2 to another position, and the robot 5 is configured to extend and contract an arm 5.1 and rotate it. A chuck 52 provided at the tip of the arm 51
grips the cold runner 2 just before it falls, moves the cold runner 2 to another position away from the molded part 1 by the extension/contraction and rotation of the arm 5l, and then drops it.

[Problem to be solved by the invention]

However, all of the conventional sorting means require a large installation space around the mold or shaping machine, and require expensive equipment in addition to the mold or shaping machine, which increases the equipment cost.

SUMMARY OF THE INVENTION An object of the present invention is to provide a molding die that does not require expensive equipment or space for installing it, and allows a molded part and a cold runner to be separated and taken out.

[Means to solve the problem]

FIG. 1 is a principle diagram showing a mold according to the present invention. The same objects are represented by the same symbols throughout the figures.

The above problem is solved by providing a runner holding section 7, a runner moving section 8, and a runner extrusion section 9 on at least one of the fixed side template and the movable side template 6, and the cold extruded from the template 6. The runner holding part 7 located at the gripping point a is configured to grip a part of the runner 2, and the runner moving part 8 grips and holds the runner holding part 7 along the surface of the template 6. The cold runner 2 is moved from the point a to the breakaway point b, and the runner extruder 9 moves from the breakaway point to the cold runner 2.
This is accomplished by the mold of the present invention, which is configured to be detachable from the runner holding portion 7. [Function] In Fig. 1, one template is provided with a runner holding part, a runner moving part, and a runner extrusion part, so that the runner holding part grasps and holds a part of the cold runner extruded from the template. In addition, by configuring the runner moving part to move the runner holding part along with the cold runner along the surface of the template, and the runner pushing part to remove the cold runner from the runner holding part, it is possible to reduce the cost of separating and taking out the cold runner. It is possible to realize a molding die in which a molded part and a cold runner can be separated and taken out without requiring special equipment or a space for installing the same.

〔Example〕

The mold according to the present invention will be explained below with reference to the accompanying drawings. FIG. 2 is a side sectional view showing the operation of the mold according to the present invention.

As shown in FIG. 2(a), the mold according to the present invention is provided with a runner holding section 7, a runner moving section 8 consisting of an air cylinder, etc., and a runner extruding section 9 on a movable side template 6, for example. Immediately after the mold is opened, the runner holding portion 7 is located at the gripping point a as shown in the figure.

When the mold plate 6 is further retreated, the push-out pin 32 automatically protrudes and the cold runner 2 is pushed out from the mold plate 6, as shown in FIG. 2(b). Although not shown, the shaped molded part is pushed out at this point and falls. However, the cold runner 2 has a runner holding part 7 located at the gripping point a.
A part of it is grabbed and held.

It is conceivable to use a chuck or the like as a means for holding the cold runner 2, but a part of the cold runner 2 is shaped into a tapered shape whose diameter increases at the bottom in order to ensure attachment to the template 6. By making the gap in the cold runner fitting portion of the runner holding portion 7 slightly smaller than the diameter thereof, the cold runner can be easily held.

Next, as shown in FIG. 2(C), the runner moving section 8 is operated to move the runner holding section 7 together with the cold runner 2 from the gripping point a to the release point b, and then the runner pushing section 9 is operated to release the cold runner. By separating the runner 2 from the runner holding part 7, the cold runner 2 can be dropped to another position away from the molded part.

In this way, one template is provided with a runner holding part, a runner moving part, and a runner extrusion part, so that the runner holding part grasps and holds a part of the cold runner extruded from the template, and the runner is moved. By moving the runner holding part along with the cold runner along the surface of the template, and making sure that the runner extrusion part separates the cold runner from the runner holding part, expensive equipment for separation and extraction can be saved. It is possible to realize a molding die that does not require a space for installation and allows the molded parts and the cold runner to be separated and taken out.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide a mold from which a molded part and a cold runner can be separated and removed without requiring expensive equipment for separation and removal or a space for installing the same.

[Brief explanation of drawings]

Fig. 1 is a principle diagram showing a mold according to the present invention, Fig. 2 is a side sectional view showing the operation of the mold according to the present invention, Fig. 3 is a perspective view showing an example of a molded part, and Fig. 4 is a perspective view showing an example of a molded part. The figure is a diagram showing an example of a conventional mold, and FIG. 5 is a schematic diagram showing an example of a conventional sorting means. In the figure, 2 is a cold runner, 6 is a template, 7 is a runner holding section, 8 is a runner moving section, 9 is a runner extrusion section, and 32 is an extrusion pin. Figure 2 α b Monore F from Kei in August: Gold! Kite diagram number 1 shows
(!) Figure 3 (b) Figure 4

Claims (1)

[Claims] A runner holding part (7), a runner moving part (8), and a runner extrusion part (9) are provided on at least one of the fixed-side template and the movable-side template (6). provided, the template (6
) The runner holding part (7) located at the gripping point a is configured to grip a part of the cold runner (2) extruded from the mold, and the runner moving part (8) is configured to hold a part of the cold runner (2) extruded from the mold. The runner holding part (7) is moved along the surface of the plate (6) from the gripping point a to the release point b together with the cold runner (2), and the runner pushing part (9) moves the release point from the gripping point a to the release point b. In the cold runner (2)
A molding die characterized in that the mold is configured to be detachable from the runner holding part (7).