JP2012248498A - Device for molding resin member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for molding a resin member, which can perform insert molding of a resin member in a space between a battery and a holder while absorbing dimension errors of the battery.SOLUTION: A device for molding a resin member includes a molding tool 50 and a battery 20. An arrangement surface opposite surface 51 of the molding tool 50 is opposed to a breaking valve arrangement surface 22 of the battery 20 at an interval, and a space S1 between the breaking valve arrangement surface 22 and the arrangement surface opposite surface 51 is provided with a spring member 54 for urging the battery 20 in a direction of pressing a breaking valve opposite side surface 24 of the battery 20 onto an opposite side surface opposite surface 53 of the molding tool 50. In this manner, the extension/contraction of the spring member 54 allows dimension errors of the battery 20 to be absorbed. Thus the device can perform insert molding of a resin member 40 in the space S between the battery 20 and a holder 30 while absorbing the dimension errors of the battery 20.

Description

  The present invention relates to a resin member molding apparatus that insert-molds a resin member with a battery and a holder for holding the battery set in a molding die.

Japanese Patent Laying-Open No. 2008-34296 discloses a battery holding structure in which a plurality of cylindrical batteries arranged in parallel (side by side) are held by a resin holder having a cylindrical portion.

  However, the battery holding structure disclosed in the above publication has a problem that the battery is relatively easily removed from the holder in the axial direction of the battery.

  In order to solve the above problem, the present applicant firstly filled a gap between the side surface of the battery and the holder with the resin by allowing the resin to flow into the gap to be solidified. (Japanese Patent Application No. 2011-116468).

  However, in the battery holding structure of Japanese Patent Application No. 2011-116468, when the battery and the holder are set in a mold for insert molding of the resin, (i) the axial length of the battery is caused by the dimensional error (tolerance) of the battery. If it is longer than the design dimension, the battery may be crushed by the mold, and (ii) if the battery axial length is shorter than the design dimension due to battery dimensional error (tolerance), the battery will rattle in the mold. There is a risk that.

JP 2008-34296 A

The objective of this invention is providing the resin member shaping | molding apparatus which can insert-mold a resin member in the clearance gap between a battery and a holder, absorbing the dimensional error of a battery.

The present invention for achieving the above object is as follows.
(1) A resin member molding apparatus that insert-molds a resin member provided in a gap between a battery and a holder that holds the battery in a state where the battery and the holder are set in a molding die,
The battery includes: a destruction valve; a destruction valve arrangement surface on which the destruction valve is provided; a destruction valve orthogonal surface perpendicular to the destruction valve arrangement surface; and a destruction valve opposite side opposite to the destruction valve arrangement surface. Has
The molding die includes a disposition surface facing surface facing the destruction valve disposition surface at an interval, an orthogonal surface facing surface facing the destruction valve orthogonal surface, and an opposite side facing surface facing the destruction valve opposite surface. , And
In the space between the destruction valve disposition surface and the disposition surface facing surface, a spring member is provided to urge the battery in a direction of pressing the destruction valve opposite side surface against the opposite side surface facing surface. Resin member molding equipment.
(2) The mold includes a nesting movable in the space between the destruction valve arrangement surface and the arrangement surface facing surface,
The spring member biases the battery through the insert,
The said nest | insert is a resin member shaping | molding apparatus as described in (1) made into the cylindrical shape where the said destruction valve enters into inner space.
(3) The resin member molding apparatus according to (1) or (2), wherein the molding die is provided with a through hole extending from the opposite side surface to the outer surface of the molding die.

According to the resin member molding apparatus of (1), the following effects can be obtained.
The facing surface of the molding die is opposed to the battery's destruction valve placement surface at a distance, and the space between the destruction valve placement surface and the placement surface facing surface is placed between the battery and the opposite side of the battery's destruction valve. Since a spring member is provided to urge the battery in a direction in which it is pressed against the opposite side surface of the mold, the dimensional error of the battery can be absorbed by the expansion and contraction of the spring member. Therefore, the resin member can be insert-molded in the gap between the battery and the holder while absorbing the dimensional error of the battery.

According to the resin member molding apparatus of (2), the following effects can be obtained.
Since the molding die has a nesting movable in the space between the destruction valve arrangement surface and the arrangement surface facing surface, the space between the destruction valve arrangement surface and the arrangement surface facing surface and the resin member provided in the molding die Even when the position of the molding cavity is close, it is possible to suppress the molten resin in the cavity from flowing into the space between the destruction valve arrangement surface and the arrangement surface facing surface by the nesting.
In addition, since the insert has a cylindrical shape in which the destruction valve enters the inner space, it is possible to suppress the destruction of the destruction valve due to the mold (nesting) hitting the destruction valve.

According to the resin member molding apparatus of (3), the following effects can be obtained.
Since the molding die is provided with a through-hole extending from the opposite surface opposite to the molding die to the outer surface of the molding die, (i) air that is pushed away by the battery when the battery is set in the molding die I can escape. Therefore, it is possible to easily set the battery in the mold compared to the case where no through hole is provided. In addition, (ii) after molding the resin member, when the mold is opened and the battery is removed from the mold, air can flow from the outside of the mold into the space where the battery was. Therefore, it is possible to easily remove the battery from the mold compared to the case where no through hole is provided.

It is a schematic plan view of a battery holding device which has a resin member shape | molded by the resin member shaping | molding apparatus of this invention Example. It is the sectional view on the AA line of FIG. It is a fragmentary sectional view of the resin member shaping | molding apparatus of this invention Example.

Below, the resin member shaping | molding apparatus of this invention Example is demonstrated.
A resin member molding apparatus (hereinafter also simply referred to as an apparatus or a molding apparatus) 10 according to an embodiment of the present invention is a resin member provided in a gap S between a battery 20 and a holder 30 that holds the battery 20 shown in FIG. 40 is an apparatus for insert molding in a state where the battery 20 and the holder 30 are set in a molding die 50 as shown in FIG.

  The battery 20 is a battery mounted on, for example, an automobile. The battery 20 is a lithium ion cylindrical battery. However, the battery 20 is not limited to a cylindrical battery, and may be a square battery. Moreover, the battery 20 is not limited to a lithium ion battery, A nickel hydride battery etc. may be sufficient.

As shown in FIG. 2, the battery 20 includes a destruction valve 21, a destruction valve arrangement surface 22 provided with the destruction valve 21, and a direction orthogonal to the destruction valve arrangement surface 22 (including a substantially orthogonal portion and a recess 23 a provided. Includes a breaker valve orthogonal surface 23 (including the recess 23a) and a breaker valve opposite side surface 24 parallel to (including substantially parallel to) the breaker valve arrangement surface 22 on the opposite side of the breaker valve arrangement surface 22.
When the internal pressure of the battery 20 becomes higher than the set pressure, the release valve 21 (which may be called a safety valve) is opened by being destroyed by the internal pressure, and discharges the gas in the battery 20 to the outside of the battery 20. It is a valve. The release valve 21 is provided only on the release valve arrangement surface 22 of the battery 20.

  As shown in FIG. 1, a plurality of batteries 20 are arranged in parallel. “Parallel” indicates how the batteries 20 are arranged side by side. The batteries 20 adjacent to each other are arranged at intervals from each other in order to prevent one battery 20 from being affected by the heat of the other battery 20. In the case where the battery 20 is a cylindrical battery, the plurality of batteries 20 may be arranged in a lattice shape, but in order to save space, two adjacent rows may be arranged in a staggered pattern. desirable.

  The holder 30 has a one-part configuration. However, the holder 30 may have a configuration in which a plurality of separate products are combined and integrated. The holder 30 is made of a metal such as an aluminum alloy, for example. However, the holder 30 may be made of resin. As shown in FIG. 2, the holder 30 holds the batteries 20 of the batteries 20 arranged in parallel (side by side) only on the destruction valve orthogonal surface 23 of the battery 20. The holder 30 holds the battery 20 on the entire circumference of the destruction valve orthogonal surface 23. The holder 30 holds the battery 20 only in a part of the direction (axial direction) orthogonal to the circumferential direction of the destruction valve orthogonal surface 23.

As shown in FIG. 1, the holder 30 is provided with the same number of battery holding holes 31 as the number of the batteries 20 held by the holder 30, and one battery 20 is provided in one battery holding hole 31. positioned. The diameters of the respective battery holding holes 31 are the same, and are larger than the design diameter of the battery 20 so as to cope with a dimensional error of the battery 20, a temperature change of the battery 20, and a radial dimension change due to charging / discharging. For example, the radius is about 2 mm. Therefore, a gap S exists between the destruction valve orthogonal surface 23 of the battery 20 and the holder 30 (the peripheral surface of the battery holding hole 31). The gap S exists over the entire circumference of the battery 20.

As shown in FIG. 2, the resin member 40 is fixed to the battery 20 and the holder 30. The resin member 40 includes a gap filling portion 41 that is provided in the gap S and fills the gap S, and a protruding portion 42 that protrudes from the gap S to the outside of the gap S.
The protruding portion 42 is a portion that protrudes from the gap S in a direction orthogonal to the circumferential direction of the battery 20 (the axial direction of the battery 20). A part of the protruding portion 42 wraps around both sides (on the left and right sides in FIG. 2) of the holder 30 in the direction orthogonal to the circumferential direction of the battery 20 (the axial direction of the battery 20).

The resin member 40 is molded (insert molding) in a state where the battery 20 and the holder 30 are set (inserted) in a molding die 50 (see FIG. 3) for molding the resin member 40.

  As shown in FIG. 3, the molding die 50 includes an arrangement surface facing surface 51 that faces the destruction valve arrangement surface 22 with a space (with a space) when the battery 30 is set in the molding die 50. , An orthogonal surface facing surface 52 that faces the destruction valve orthogonal surface 23, and an opposite side surface 53 that faces the destruction valve opposite surface 24.

The arrangement surface facing surface 51 is parallel to the destruction valve arrangement surface 22 (including substantially parallel). Since the arrangement surface facing surface 51 faces the destruction valve arrangement surface 22 with a space, a space S1 exists between the arrangement surface opposed surface 51 and the destruction valve arrangement surface 22, and the battery 20 is molded into the mold 50. On the other hand, it is movable in a direction approaching and separating from the arrangement surface facing surface 51.
The orthogonal surface facing surface 52 is parallel to (including substantially parallel to) the destruction valve orthogonal surface 23. The direction in which the battery 20 approaches and separates from the orthogonal surface opposing surface 52 with respect to the mold 50 is negligible even if there is a gap between the orthogonal surface opposing surface 52 and the destruction valve orthogonal surface 23. It is suppressed to move to.
The opposite side facing surface 53 is parallel (including substantially parallel) to the destruction valve opposite side surface 24.

  A spring member 54 and a nest 55 are provided in the space S1 between the arrangement surface facing surface 51 and the destruction valve arrangement surface 22. Both the spring member 54 and the insert 55 are constituent members of the mold 50.

  The spring member 54 is, for example, a coil spring. One end of the spring member 54 is in contact with the arrangement surface facing surface 51, and the other end of the spring member 54 is in contact with the insert 55. The spring member 54 urges the battery 20 through the insert 55 in the direction in which the destruction valve opposite side surface 24 is pressed against the opposite side opposite surface 53.

  The nest 55 is movable only in the direction of approaching and separating from the arrangement surface facing surface 51 in the space S1. The insert 55 has a cylindrical shape in which the destruction valve 21 enters (receives the destruction valve 21) into the inner space 55 a when the battery 20 is set in the mold 50.

The mold 50 is provided with a through hole 56 extending from the opposite side facing surface 53 to the outer surface 50 a of the mold 50. The diameter of the through hole 56 is made smaller than the diameter of the battery 20 in order to prevent the battery 20 from coming out of the mold 50 through the through hole 56.

Next, the operation of the embodiment of the present invention will be described.
(A) The placement surface facing surface 51 of the mold 50 is opposed to the destruction valve placement surface 22 of the battery 20 with a gap, and the space S1 between the destruction valve placement surface 22 and the placement surface facing surface 51 is in the space S1. Since the spring member 54 that urges the battery 20 in a direction to press the opposite side surface 24 of the battery 20 against the opposite side surface 53 of the mold 50 is provided, the expansion and contraction of the spring member 54 causes the battery 20 to expand and contract. Dimensional errors can be absorbed. Therefore, the resin member 40 can be insert-molded in the gap S between the battery 20 and the holder 30 while absorbing the dimensional error of the battery 20.

(B) Since the mold 50 includes the nesting 55 that is movable in the space S1 between the destruction valve arrangement surface 22 and the arrangement surface facing surface 51, the mold 50 is located between the destruction valve arrangement surface 22 and the arrangement surface facing surface 51. Even when the space S1 and the cavity 57 for molding the resin member 40 provided in the mold 50 are close to each other, the molten resin in the cavity 57 is inserted into the destruction valve arrangement surface 22 and the arrangement surface facing surface 51 by the insert 55. It can suppress flowing into space S1 between.
In addition, since the insert 55 has a cylindrical shape in which the destruction valve 21 enters the inner space 55a, it is possible to suppress the destruction of the destruction valve 21 by the molding die 50 (the insertion 55) hitting the destruction valve 21.

(C) Since the molding die 50 is provided with a through hole 56 extending from the opposite side facing surface 53 of the molding die 50 to the outer surface 50a of the molding die 50, (i) the battery 20 is set in the molding die 50. At this time, the air that is pushed away by the battery 20 can escape from the mold. Therefore, the battery 20 can be easily set in the mold 50 as compared with the case where the through hole 56 is not provided. (Ii) When the molding die 50 is opened after the resin member 40 is molded and the battery 20 is removed from the molding die 50, air can be allowed to flow into the space where the battery 20 was present from outside the mold. Therefore, the battery 20 can be easily removed from the mold 50 as compared to the case where the through hole 56 is not provided.

(D) Since the resin member 40 is provided in the gap S between the battery 20 and the holder 30, the battery 20 is inserted into the holder 30 using the adhesive force between the resin member 40 and the battery 20 and / or the holder 30. Can be held. Therefore, it is possible to make it difficult for the battery 20 to be removed from the holder 30 as compared with the case where the resin member 40 is not provided.

(E) Since the resin member 40 is provided in the gap S between the battery 20 and the holder 30, the battery 20 and the holder 30 can be electrically insulated even if the holder 30 is made of metal. Moreover, transfer of heat between the battery 20 and the holder 30 can be suppressed.

(F) Since the resin member 40 includes the protruding portion 42 that protrudes from the gap S to the outside of the gap S, the resin member 40, the battery 20, and the holder 30 can be compared to the case where the resin member 40 does not include the protruding portion 42. The contact area (bonding area) can be increased. Therefore, the holding power of the battery 20 via the resin member 40 of the holder 30 can be increased, and the battery 20 can be hardly removed from the holder 30.

(G) Since the resin member 40 includes the protruding portion 42 that protrudes from the gap S to the outside of the gap S, the resin member 40, the battery 20, and the holder 30 can be compared to the case where the resin member 40 does not include the protruding portion 42. The contact area (adhesion area) can be increased, and the battery 20 can be prevented from tilting left and right with respect to the holder 30 due to vehicle running vibration or the like.

(H) Since part of the protruding portion 42 wraps around both sides of the holder 30 in the direction orthogonal to the circumferential direction of the battery 20, even if the resin member 40 is peeled off from the holder 30, It is possible to prevent the resin member 40 from dropping from the holder 30 due to the portion being caught by the holder 30.

DESCRIPTION OF SYMBOLS 10 Resin member shaping | molding apparatus 20 Battery 21 Destruction valve 22 Destruction valve arrangement surface 23 Destruction valve orthogonal surface 23a Recess 24 Destruction valve opposite side 30 Holder 31 Battery holding hole 40 Resin member 41 Gap filling part 42 Overhang part 50 Mold 50a Mold Outer surface 51 Arrangement surface facing surface 52 Orthogonal surface facing surface 53 Opposite side surface facing surface 54 Spring member 55 Nest 55a Nest inner space 56 Through hole 57 Cavity S Clearance S1 Space between the breaker valve placement surface and the placement surface facing surface

Claims (3)

A resin member molding apparatus that insert-molds a resin member provided in a gap between a battery and a holder holding the battery in a state where the battery and the holder are set in a molding die,
The battery includes: a destruction valve; a destruction valve arrangement surface on which the destruction valve is provided; a destruction valve orthogonal surface perpendicular to the destruction valve arrangement surface; and a destruction valve opposite side opposite to the destruction valve arrangement surface. Has
The molding die includes a disposition surface facing surface facing the destruction valve disposition surface at an interval, an orthogonal surface facing surface facing the destruction valve orthogonal surface, and an opposite side facing surface facing the destruction valve opposite surface. , And
In the space between the destruction valve disposition surface and the disposition surface facing surface, a spring member is provided to urge the battery in a direction of pressing the destruction valve opposite side surface against the opposite side surface facing surface. Resin member molding equipment. The mold includes a nesting movable in the space between the destruction valve arrangement surface and the arrangement surface facing surface,
The spring member biases the battery through the insert,
The resin member molding apparatus according to claim 1, wherein the nest has a cylindrical shape in which the destruction valve enters an inner space.   The resin member molding apparatus according to claim 1, wherein the molding die is provided with a through hole extending from the opposite side surface to the outer surface of the molding die.

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