JPH0615000Y2 - Flat wire connection part insert mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a flat wire connection part insert molding die having a plurality of molding chambers for accommodating flat wire connection parts to be insert-molded. .

[Prior Art] A flat electric wire 1 having a structure in which a flat conductor 1a as shown in FIGS. 4 and 5 is covered with a flat insulating layer 1b.
The flat wire connection portion 2 is formed by connecting the flat conductors 1a to each other by ultrasonic welding or the like. When insert molding the flat electric wire connecting portion 2,
In the vertical mold clamping / horizontal injection molding method as shown in the figure,
Conventionally, a flat wire connecting portion 2 is set in a molding chamber 6 between a lower die 4 on a base table 3 and an upper die 5 to be placed thereon, and the flat wire connecting portion 2 is externally molded between the lower die 4 and the upper die 5. The flat electric wires 1 on both sides connected to the flat electric wire connecting portion 2 are set in the flat electric wire accommodating path 7 reaching the chamber 6, and the upper mold 5 is clamped to the lower mold 4 and the injection nozzle 8a of the injection molding machine 8 is set. Resin through the runner portion 9 between the lower die 4 and the upper die 5
Insert molding is performed by injecting into the inside.
In this case, the direction of the runner portion 9 from the outside to the molding chamber 6 is necessarily perpendicular to the alignment direction of the flat wire accommodation path 7 and the molding chamber 6.

In this way, there may be a plurality of flat electric wire connecting portions 2 to be insert-molded as shown in FIG. 7, and adjacent flat electric wire connecting portions 2 may be separated from each other. In FIG. 7, reference numeral 10 is an insert molding portion made of resin.

In the case of insert-molding each flat electric wire connection portion 2 of the flat electric wire 1 having a plurality of such flat electric wire connection portions 2, the following three molding methods can be considered.

(B) Each flat electric wire connecting portion 2 is sequentially insert-molded one by one.

(B) A plurality of molding chambers are provided in the mold, and an independent runner portion is provided in each molding chamber to perform insert molding at one time.

(C) As shown in FIG. 8, a lower mold 4 and an upper mold (not shown)
Between the first and second molding chambers 6 ₁ , 6 in this example.
₂ and the first and second flat wire accommodating passages 7 ₁ and 7 ₂ extending in the direction crossing the first and second molding chambers 6 ₁ and 6 ₂ , respectively. _First and _second runners 9 ₁ , 9 ₂ provided with ₁ , 6 ₂ between the lower mold 4 and the upper mold 5
Connect in series with and insert-mold at once.

[Problems to be Solved by the Invention] However, the above-described molding methods (a) to (c) have the following problems.

In the molding method of (a), it is necessary to sequentially set the mold for each flat electric wire connecting portion 2 and perform the molding work one place at a time, which requires man-hours and productivity is poor.

In the molding method (b), a middle mold is required to separate the lower mold, the upper mold and the runner part from the molding chamber, and the mold becomes very complicated and expensive.

In the molding method of (C), the first and second molding chambers 6 ₁ , 6 ₂
Are connected in series by the first and second runners 9 ₁ and 9 ₂ , it is very difficult to determine the molding conditions, and the flat wire connection part set in the _first molding chamber 6 ₁ at the first stage. 2 may be damaged by the injection pressure of the resin.

An object of the present invention is to provide a flat wire connection part insert molding die that does not require a middle die and can insert-mold a plurality of flat wire connection portions with a low-cost die.

[Means for Solving the Problems] The structure of the present invention for achieving the above object will be described. In the present invention, a molding chamber for accommodating a flat wire connecting portion to be insert-molded is provided between a lower mold and an upper mold. Are provided in the
And between the lower mold and the upper mold, a flat wire accommodation path from the outside to each of the molding chambers and a runner portion to each of the molding chambers are respectively provided, and a common runner inlet portion to each of the runner portions is provided. In the flat wire connection part insert molding die, which is designed to be supplied with resin,
The flat electric wire accommodation path of the molding chamber near the runner inlet and the runner portion of the molding chamber remote from the runner inlet are provided so as to cross each other in a mutually communicating state. To do.

[Operation] When the flat wire accommodating path in the molding chamber near the runner inlet and the runner portion in the molding chamber remote from the runner inlet are vertically communicated with each other in this way, the middle size is not required. Since the resin can be supplied in parallel to a plurality of molding chambers, the structure of the mold can be simplified.

[Embodiment] An embodiment of the present invention will be described below in detail with reference to FIGS. 1 to 3. The parts corresponding to those in FIGS. 6 and 8 described above are designated by the same reference numerals.

The flat wire connecting portion insert molding die of this embodiment is composed of a lower die 4 and an upper die 5 which is superposed on the lower die 4 and clamped. Between the lower mold 4 and the upper mold 5, the first and second molding chambers 6 ₁ and 6 ₂ and the first and second molding chambers 6 ₁ and 6 ₂ which are oriented in a direction crossing the first and second molding chambers 6 ₁ and 6 ₂ . The second flat wire storage paths 7 ₁ and 7 ₂ and the first and second runner portions 9 ₁ and 9 reaching these first and second molding chambers 6 ₁ and 6 _2.
2 , a common runner portion 9 ₃ that distributes the resin to the first and second runner portions 9 ₁ and 9 ₂ , and the common runner portion 9
₃ to connect the injection nozzle 8a described above and runner inlet 9 ₄ for receiving a supply of resin is provided. In particular, in this embodiment, close to the runner inlet 9 ₄ first shaping chamber 6
₁ first flat wire receiving channel ₇₁ of the runner and the inlet portion 9 ₄ from a remote second forming chamber 6 ₂ second runner portion 9 ₂ is a cross-section 11 in a state of communication with each other It is provided to cross vertically. In addition, the first flat wire accommodation path 7 ₁ intersecting the second runner portion 9 ₂ in this way
Of portions located on opposite sides of the second runner section 9 _2, as the resin leakage can not occur against the flat wire receiving passage 7 ₂ of the second, to clamp the flat electric wire 1 at moderate clamping pressure, the the first flat wire receiving passage ₇₁ of the thickness is set smaller to about 90% of the thickness of the flat cable 1.
For example, when the thickness of the flat cable 1 is 0.36mm, the first flat wire receiving passage ₇₁ has a thickness of 0.32 mm, i.e. about 8
Make it 8.9% thick.

When such a mold is used, the first and second runner parts 9
Resin can be supplied in parallel to the first and second molding chambers 6 ₁ and 6 ₂ via ₁ and 9 ₂ to simultaneously insert-mold the flat wire connection portions in the respective molding chambers 6 ₁ and 6 ₂ . From this case, it is in communication with each other first flat wire receiving channel ₇₁ and the second runner section 9 ₂ intersects, the first thickness of the flat wire receiving passage ₇₁ of the flat cable thickness Since the flat wire 1 is clamped by the lower mold 4 and the upper mold 5 by reducing the size, the resin is not applied to the _first flat wire accommodating passages 7 ₁ on the left and right of the _second runner portion 9 _{2 at} the intersection 11. It does not leak.

In addition, in the above-mentioned embodiment, the case where there are two molding chambers is shown, but the present invention can be similarly applied to the case where there are three or more molding chambers.

[Advantages of the Invention] As described above, in the flat wire connecting portion insert molding die according to the present invention, the flat wire accommodating path in the molding chamber near the runner inlet and the runner in the molding chamber remote from the runner inlet. Since the parts and the parts intersect each other vertically while communicating with each other, the resin can be supplied in parallel to multiple molding chambers without the need for a middle mold, and the structure of the mold can be simplified, making the mold. The cost can be reduced. Also, since the resin is supplied in parallel to each molding chamber, molding conditions are not difficult, and unlike the case where resin is supplied in series, the flat wire connection part housed in the first molding chamber is damaged by resin pressure. There is an advantage that such a thing does not occur. Further, since a plurality of molding chambers are arranged side by side, the flat electric wire connecting portion can be easily set by using the automatic feeder, and the molding can be easily automated.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of a mold according to the present invention, FIG. 2 is a plan view of a lower mold of this embodiment, and FIG. 3 is a cross-sectional view of a mold of this embodiment. FIG. 5 is a perspective view showing an example of a flat electric wire connecting portion, FIG. 5 is a cross sectional view showing an example of a flat electric wire, FIG. 6 is a perspective view of a conventional injection molding apparatus, and FIG. 7 is a flat surface having a plurality of connecting portions. Eighth perspective view showing an example of an electric wire
The figure is a plan view showing an example of a lower mold of a conventional mold. 1a ... flat conductor, 1b ... flat insulating layer, 1
...... Flat wire, 2 ...... Flat wire connection part, 4 ......
Lower mold, 5 ... Upper mold, 6 ... Molding chamber, 6 ₁ , 6 ₂ ... First and second molding chambers, 7 ... Flat wire receiving passage, 7 ₁ ,
7 ₂ ...... First and second flat wire accommodating passages, 8 ...... Runner section, 9 ₁ , 9 ₂ ...... First and second runner sections, 10
…… Insert molding part, 10 …… intersection part.

Claims (1)

[Scope of utility model registration request] 1. A plurality of molding chambers for accommodating a flat electric wire connecting portion to be insert-molded are provided between a lower mold and an upper mold,
And between the lower mold and the upper mold, a flat wire accommodation path from the outside to each of the molding chambers and a runner portion to each of the molding chambers are respectively provided, and a common runner inlet portion to each of the runner portions is provided. In the flat wire connection part insert molding die, which is designed to be supplied with resin,
The flat electric wire accommodation path of the molding chamber near the runner inlet and the runner portion of the molding chamber remote from the runner inlet are provided so as to cross each other in a mutually communicating state. Mold for insert molding of flat electric wire connection part.