JPH0479812B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a novel integration of multicolor lighting lenses, lenses of different performance, and other lenses of different types used in front or rear combination lamps used in vehicle lighting equipment such as automobiles. This relates to a cotter used for molding molds.

[Conventional technology]

By the way, as a lens for a lighting device for a vehicle such as an automobile, especially a so-called combination lamp having a multicolor illumination lens, for example, an amber lens of a different color or a different kind is used as a part of the clearance lens 50 as shown in FIG. 4 A and B. 51 etc. are integrally constructed in a continuous or floating island shape (hereinafter referred to as a "different type lens"). In many cases, such lenses of different types are produced by forming a secondary cavity 51a for post-molding in a set of molds A and B forming a primary cavity 50a for pre-molding, as shown in FIG. A pair of slide inserts a and b are assembled to form a pair of slide inserts a and b, and when slide inserts a and b are slid to one side (direction A in the figure), the sliding surface of one slide insert b is When the opening on the side of the secondary cavity 51a of the cavity 50a is closed in a pressed state and the slide inserts a and b are moved to the other side (direction B in the figure), the primary cavity 50a and the secondary cavity 51a are connected to each other. After the clearance lens 50 and the like are firstly molded using a molding die that can be used for molding, the amber lens 51 and the like are secondarily molded.

Further, the first slide insert a is positioned in contact with the slope of the inclined block 52 disposed at the rear end, and is always pressed toward the rear end by the spring 53, and the other slide insert b The structure is such that the position is determined by a cylinder 54 disposed at the rear end. This slide insert b
is in a straight line with the slide insert a, and a part thereof is inserted into the mold A side, and during primary molding, its sliding surface can close the primary cavity 50a formed by the molds A and B. It's becoming like that.

[Problem that the invention seeks to solve]

However, according to the above-mentioned conventional molding die, the cylinder 54 receives the injection pressure applied to the secondary cavity 51a during secondary molding by the slide inserts a and b, so the pressure resistance of the cylinder 54 This has the disadvantage that the product area that can be molded is limited by the secondary cavity 51a formed by the slide inserts a and b, and when the number of cylinders is increased to compensate for this, the mold structure becomes complicated. It was hot.

The present invention was devised in view of the above-mentioned problem, and a slide insert is formed by arranging and configuring a connector that engages with the rear end of one slide insert at the rear end of the slide insert. By separating the slide insert receiving structure for the injection pressure applied inside the cavity and the drive structure of the slide insert itself, we eliminate restrictions on the size and shape of the cavity structure on the slide insert side, and reduce the amount of money required for this. The purpose of this project is to propose a mold for integrally molding different types of lenses, which can reduce the number of molds and cylinders to the necessary minimum, reduce the number of work steps, and make the molding work unmanned and automated.

[Means for solving problems]

Thus, the mold for integrally molding dissimilar lenses according to the present invention has a mold for forming a cavity in a guide hole formed in a set of molds, which is continuous with a cavity formed by the set of molds. A cylinder for slidably accommodating a set of slide inserts and for positioning each slide insert is placed opposite to the rear end side of each slide insert, and a plurality of independent injection mechanisms are sequentially installed in each of the cavities. In a dissimilar lens integral molding mold in which a plurality of dissimilar lenses are integrally molded by injecting different molten resin materials from a mold, the mold slides forward and backward from the rear end of one slide insert in a direction perpendicular to its sliding axis, The first slide insert, which moves to one side or the other in the guide hole, is arranged and configured so that it can be locked at a predetermined position in the guide hole, and the slide insert and the rear end thereof A measure is taken to form concavo-convex portions that engage with each other on the sliding surface portions of the mating starters.

[Effect]

According to the above configuration, when different types of lenses are integrally molded, the injection pressure applied to the cavity formed by the slide insert can be received by the cylinder, so the shape of the cavity and the number of cylinders can be easily absorbed. The size can be freely designed, and the functions of the drive source for the slide insert and the injection pressure receiver in the cavity formed by the slide insert are separated, making it possible to use a small cylinder and reducing the molding work time. This not only contributes to reducing mold costs and other expenses, but also reduces the time interval between primary molding work and secondary molding work by joining primary molded products and secondary molded products. Different types of lenses can be integrally molded with high precision.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a mold for integrally molding different types of lenses according to the present invention will be described below with reference to the drawings.

The present invention relates to a mold for simultaneously integrally molding a primary molded product 1 and a secondary molded product 2, which absorbs the injection pressure applied to the cavity formed by the slide insert in a mold having a slide insert inside. 1 to 3 show an embodiment of a mold in which a floating island-shaped lens portion is secondarily molded by post-molding within a main lens portion that is primarily molded by pre-molding.

That is, in a set of molds A and B that form a cavity 1a for molding a main lens portion which is a primary molded product 1 by pre-casting, a mold is placed in contact with one side of the cavity 1a, and in both molds A and B. A pair of slide inserts a and b that connect the spanning guide holes 3 and form a cavity 2a for a floating island-shaped lens portion, which is a secondary molded product 2 by post-molding, are slid into the guide holes 3. Accommodate freely. That is, one side of the cavity 1a for the primary molded product 1 is open in contact with the inside of the guide hole 3, and the opening is opened and closed by the sliding surface of the slide insert b. There is. Further, the slide inserts a and b are slid by the driving force of cylinders 4 and 5 placed opposite to each other at their respective rear ends, and hydraulic or pneumatic pressure can be selectively supplied to the cylinders 4 and 5. Accordingly, each rod 4a,
5a, the slide inserts a and b can be slid within the guide hole 3 between the upper limit and the lower limit, respectively. Further, in the present invention, on the rear end side of the slide insert b,
A colander 6 is disposed perpendicular to the sliding direction of the slide insert b, and slides back and forth in a direction perpendicular to the sliding axis of the slide insert b on the rear end side to engage with the slide insert b in a wedge-like manner. Yes, this Kotter 6
When the injection pressure from the injection mechanism is applied to the cabinet 2a formed by the slide inserts a and b, the movement of the slide insert b in the downward limit direction is stopped. On the mating surface, there are several teeth or uneven parts 7 that mesh with each other.
a, 7b are formed, and the slide insert b is supported on the upper limit side with the protrusions 7b of both abutting each other, and the slide insert b is supported with the protrusions 7a and 7b of both engaging with each other. b is allowed to move toward the lower limit side. Therefore, the small stroke of the roller 6, that is, the teeth or unevenness 7a,
Slide inserts a and b with a stroke of thickness 7b
This has the effect of allowing large strokes. Then, the slider 6 is moved in the direction of arrow A by the cylinder 8, and the slide insert b is moved to the lower limit while engaging the uneven portions 7a and 7b formed on the sliding surfaces of the slide insert b and the slider 6. When moved to the side (arrow B direction), the cavity 1a formed by the molds A and B for the primary molded product 1 is closed by the sliding surface of the slide insert b, and vice versa. After moving a and b in the upward limit direction (direction of arrow C) by the respective cylinders 4 and 5, the cylinder 6 is moved in the opposite direction (direction of arrow D) by the driving force of cylinder 8, and the convex portion 7b is moved.
When the slide inserts b are brought into contact with each other and the slide inserts b are locked at the upper limit side, a cavity 2a side formed by the slide inserts a and b and molds A and B that accommodate the slide inserts a and b are formed. The cavity 1a side can be continuous with the cavity 1a side. Therefore, the cylinders 4 and 5 are simply slide inserts a and b, respectively.
Since it is not necessary to receive the injection pressure applied to the cavity 2a formed by the slide inserts a and b, it can be made smaller compared to conventional cylinders, and the mold structure can be simplified. It is possible to convert Also, cavity 2
Since the injection pressure applied inside a is completely received by the cylinder 6, the cavity 2a formed by the slide inserts a and b, that is, the cavity 2a
There are no restrictions on the size or shape of the product that can be molded, which improves design freedom.

Therefore, when molding different types of lenses, first move the slide inserts a and b to the lower limit side, and move the molds A and B from cavity 1a to cavity 2.
A is made independent (see Figure 1), and a molten resin material is injected into the cavity 1a by one injection mechanism,
For example, after molding the primary molded product 1 that will become the main lens part, move the slide inserts a and b to the upper limit side,
The cavities 2a on the sides of slide inserts a and b are connected to the primary molded product 1 molded in the cavities 1a on the sides of molds A and B (see Fig. 2), and a resin molten material different from that of the primary molded product 1 is applied. Secondary molded product 2 that is injected by another injection mechanism and becomes, for example, a floating island-shaped lens part
All you have to do is mold it. Therefore, there is no need to separate molds A and B or use other molds after molding the primary molded product 1, and it is not necessary to separate the molds A and B or use other molds. Only by the sliding motion of the slide inserts a and b, it is possible to simultaneously mold the primary molded product 1 and the secondary molded product 2 integrally continuous with it as shown in Fig. 4 A and B, thereby reducing the molding work. The time can be significantly reduced. In addition, this shortened time makes it possible to control the molding time from primary molding to secondary molding, and the primary molded product 1
After molding, it is possible to inject the molten resin material for the secondary molded product 2 before it solidifies.
It is possible to improve the accuracy of the joint between the primary molded product 1 and the secondary molded product 2.

In addition, in the above embodiment, the slide inserts a,
Although the configuration in which the floating island-like lens portion is post-molded using b is explained, it is natural that the slide inserts a and b can be modified to be pre-molded without changing the mold structure, and it is also possible to make the floating island lens part post-molded. It is also possible to integrally mold lenses for combination lamps in which lenses are continuously formed.

〔Effect of the invention〕

Since the mold for integrally molding different types of lenses according to the present invention is configured as described above, the size and shape of the cavity formed by the slide insert can be freely designed. It is possible to integrally mold floating island-shaped lenses of various sizes and sizes, and it is also possible to reduce the number of man-hours required for molding multicolor lighting lenses and other different types of lenses. enables the aggregation of In addition, since the number of molds required for molding can be significantly reduced, it contributes to lowering the cost of multicolor lighting lenses and other types of lenses used in combination lamps, etc., and also helps automate and unmanned molding work. You can, etc.
It has excellent effects.

[Brief explanation of drawings]

FIG. 1 shows a schematic configuration of a mold forming a mold for integrally molding different types of lenses according to the present invention, and A is a front sectional view of the slide insert moved to the lower limit side; B is a sectional view of the same side, FIG. 2 A is a front sectional view of the same side with the slide insert moved to the upper limit side, B is a sectional view of the same side, and FIG. , Figure 4 A and B are perspective views of the product molded by the conventional molding method, and Figure 5
The figures show the structure of a conventional mold, in which A is a front sectional view during primary molding, and B is a front sectional view during secondary molding. A, B...Mold, a, b...Slide insert, 1
...Primary molded product, 2...Secondary molded product, 1a...Cavity, 2a...Cavity, 3...Guide hole,
4, 5, 8...Cylinder, 6...Cotter.

Claims (1)

[Scope of Claims] 1. A set of slide inserts forming a cavity continuous to a cavity formed by the set of molds is slidably accommodated in a guide hole formed in a set of molds. At the same time, a cylinder for positioning each slide insert is placed opposite to the rear end side of each slide insert, and a plurality of molten resin materials are sequentially injected into each of the cavities from a plurality of independent injection mechanisms. In a mold for integrally molding different types of lenses, a mold that slides forward and backward from the rear end of one slide insert in a direction perpendicular to its sliding axis and moves to one side or the other side within the guide hole. A mold for integrally molding different types of lenses, the slide insert being arranged so as to be able to lock in a predetermined position within the guide hole. 2. Form concave and convex portions that engage with each other on the sliding surface of the slider that slides forward and backward with respect to the first slide insert and its rear end, so that when the first slide insert moves to one side of the guide hole, the convex portions The different types according to claim 1, characterized in that when the one slide insert is moved to the other side within the guide hole, the concave and convex portions of the two engage with each other. Cotter for lens integral molding.