JPH0479811B2 - - 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 molding dies.

[Conventional technology]

By the way, heretofore, as a lighting device for a vehicle such as an automobile, especially a so-called combination lamp having a multicolored illumination lens, for example, as shown in FIG. An integrated lens (hereinafter referred to as a "different lens") is used. In many cases, such lenses of different types are provided with 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. Incorporate a pair of slide inserts a and b to form a slide insert a and b.
When sliding to one side (direction A in the figure), the sliding surface of the first slide insert b touches the primary cavity 50a.
When the secondary cavity 51a side opening of
The clearance lens 50 and the like are firstly molded using a molding die that allows the secondary cavity 51a to be made continuous, and then 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 allows the slide insert to There is a drawback that the product area that can be molded is limited by the secondary cavity 51a formed by the children a and b, and if the number of cylinders is increased to compensate for this, the mold structure becomes complicated. .

Furthermore, due to the mold structure, the post-molding side is limited to the slide inserts a and b, so the slide inserts a,
A side gate is required on the side of the secondary cavity 51a formed by b, and the product shape is limited to a shape that allows the configuration of the side gate. Therefore, it is not possible to simultaneously integrally mold an amber lens of a different color or shape into a floating island shape on one side or a part of the main lens portion 50 such as a clearance lens as shown in FIG. When molding the floating island lens portion 51, the main lens portion 50 and the floating island lens portion 51 are molded separately, and in a post process, they are bonded together by ultrasonic welding or other method to form an integrated product. A so-called insert molding method has been used in which a pre-molded floating island lens portion 51 is inserted into a predetermined portion of the main lens portion 50 when molding the main lens portion 50, in which both are integrally molded.

The present invention was devised in view of the above problem, and when integrally molding different types of lenses such as a main lens part and a floating island lens part, the floating island lens part is cast into the main lens part first or later. In addition to molding, there are no restrictions on the shape or size, and the number of molds and cylinders required for this is reduced to the minimum necessary, reducing the number of work hours, and making the molding work unmanned and automated. The purpose of this study is to propose a mold for integrally molding different types of lenses.

[Means for solving problems]

Accordingly, the dissimilar lens integral molding mold according to the present invention is a dissimilar lens integral molding mold that integrally molds a plurality of dissimilar lenses using a plurality of independent injection mechanisms, and includes a guide hole formed in a set of molds. A set of slide inserts forming a cavity continuous to the cavity formed by the set of molds is slidably accommodated therein, and a cylinder for positioning each slide insert is housed in each slide insert. The slider is disposed opposite to the rear end side of the slider and engages with the rear end of one slide inserter to stop it from moving to the other side when both slide inserts move to one side of the guide hole. Means for forming recesses and recesses that engage with each other on the sliding surface of the colander, which is arranged so as to be slidable orthogonal to the sliding axis of the insert, and which is slidably engaged with one slide insert and its rear end. This study included the following.

[Effect]

According to the above configuration, when integrally molding different types of lenses, it is not only possible to integrally mold the floating island-like lens part within the main lens part by first casting or after-casting, but also the shape of the floating island-like lens part can be changed. In addition, the drive source for the slide insert and the function of the injection pressure receiver in the cavity formed by the slide insert are separated, making it possible to use a small cylinder and making the molding work easier. In order to reduce man-hours and increase work efficiency, contribute to cutting mold costs and other expenses, and further reduce the time interval between primary molding work and secondary molding work, the joint area between primary molded products and secondary molded products It is possible to integrally mold different types of lenses with increased 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 integrally molding different types of lenses, such as simultaneous integral molding of a floating island-shaped lens part within a main lens part. This figure shows an example of secondary molding of a floating island-shaped lens portion by post-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 set of slide inserts a and b forming a cavity 2a for a floating island-shaped lens portion, which is a secondary molded product 2, is slidably accommodated in the guide hole 3 by connecting the straddling guide holes 3. do. 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. It's summery. In addition, the slide insert a,
b slides by the driving force of cylinders 4 and 5 placed opposite each other in the sliding direction, and by selectively supplying hydraulic or pneumatic pressure to the cylinders 4 and 5, 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. In addition, in this embodiment, on the lower side of the slide insert b, there is a line that is perpendicular to the sliding direction of the slide insert b, and is perpendicular to the sliding axis of the slide insert b at the rear end of the slide insert b. A cotter 6 is arranged which slides in the direction and engages with this in a wedge-like manner. When injection pressure is applied inside the cavity 2a, the slider 6 stops the slide insert b from moving in the downward limit direction, and has several plates that engage with each other on each engagement surface where the two come into contact. The slide insert b is supported on the upper limit side with the two protrusions 7b in contact with each other, and the two protrusions 7a and 7b engage with each other. In the fitted state, the slide insert b can be allowed to move toward the lower limit side. Therefore, there is an effect that a small stroke of the slider 6, that is, a stroke corresponding to the thickness of the teeth or unevenness 7a, 7b, can permit a large stroke of the slide inserts a, b. 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 portions 7b are moved together. When they come into contact and lock the slide insert b at the upper limit side,
Cavity 2a formed by the slide inserts a and b
Molds A and B that accommodate the sides and the slide inserts a and b
It is designed so that the cavity 1a formed by the two can be continuous. Therefore, the cylinders 4, 5
The cylinders simply serve as driving sources for the slide inserts a and b, respectively, and there is no need to receive the injection pressure applied to the cavity 2a formed by the slide inserts a and b, so the cylinder is more compact than the conventional cylinder. It is possible to simplify the mold structure. Furthermore, since the injection pressure applied to the inside of the cavity 2a is completely absorbed by the molder 6, there is no limit to the size of the cavity 2a formed by the slide inserts a and b, that is, the area of the product molded by the cavity 2a. This improves the freedom of

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 (see Figure 1), and after injecting molten resin material into the cavity 1a using one injection mechanism to mold the primary molded product 1 that will become the main lens part, slide inserts a and b are moved to the upper limit. Move it to the side, mold A,
The primary molded product 1 molded in the cavity 1a on the B side is connected to the cavity 2a on the slide inserts a and b side (see Fig. 2), and the molten resin material different from the primary molded product 1 is transferred to another injection mechanism. Cavity 2
A can be injected into the secondary molded product 2 to form a floating island-shaped lens portion. Therefore, primary molded product 1
There is no need to separate molds A and B or use another mold after molding, and the sliding of slide inserts a and b in molds A and B remains in the molding position relative to the primary molded product 1. By only moving operations, it is possible to simultaneously mold a primary molded product 1 and a secondary molded product 2 integrally continuous therewith as shown in FIG. In addition, this shortened time makes it possible to control the molding time from primary molding to secondary molding, and it is possible to inject the molten resin material for secondary molded product 2 after primary molded product 1 has been molded, before it solidifies. Therefore, the accuracy of the joint between the primary molded product 1 and the secondary molded product 2 can be improved.

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, it is possible to integrally mold the floating island-like lens part within the main lens part, and it is also possible to mold the different types of lenses such as multicolor illumination lenses. It is possible to reduce the number of man-hours, apply the integral molding method according to the invention to conventional component manufacturing that combines a plurality of different types of molded products, and enable not only different types of lenses but also multicolor laminated molding and assembly of parts. 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 different types of lenses used in combination lamps, and also aims to automate and unmanned molding work. It has excellent effects such as the ability to

[Brief explanation of the drawing]

Fig. 1 shows a schematic configuration of a molding machine according to the present invention, in which A is a front sectional view with the slide insert moved to the lower limit side, B is a sectional view on the same side, and Fig. 2 A is a sectional view of the same side. Similarly, a front sectional view with the slide insert moved to the upper limit side, B is a sectional view on the same side, and Figures 3A and 3B are perspective views of a product molded by the conventional molding method.
FIG. 4 shows 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. In a mold for integrally molding a plurality of different types of lenses using a plurality of independent injection mechanisms, a mold for integrally molding a plurality of different types of lenses is formed in a guide hole formed in a set of molds by the set of molds. A set of slide inserts forming a continuous cavity are slidably accommodated, and a cylinder for positioning each slide insert is placed opposite to the rear end side of each slide insert, In addition, when both slide inserts move to one side in the guide hole, a stopper that engages with the rear end of one slide insert and stops the slide insert from moving to the other side is arranged perpendicularly to the sliding axis of the slide insert. A mold for integrally molding different types of lenses, which is characterized by being arranged so that they can slide freely. 2. The mold for integrally molding dissimilar lenses according to claim 1, characterized in that a sliding surface portion of a cotter that is slidably engaged with one slide insert and its rear end is formed with a concave and convex portion that engages with the other.