KR20140065643A

KR20140065643A - Molding apparratus with cover

Info

Publication number: KR20140065643A
Application number: KR1020120130996A
Authority: KR
Inventors: 이규형; 김영관
Original assignee: 세방전지(주)
Priority date: 2012-11-19
Filing date: 2012-11-19
Publication date: 2014-05-30

Abstract

The present invention relates to a mold apparatus having a lid, and more particularly, to a mold apparatus having a lid on an upper portion of a mold for manufacturing an electrode plate and having a lid capable of being pressurized so that the supplied ladle can be uniformly filled .

Description

[0001] Molding apparratus with cover [0002]

Large batteries, for example automotive and truck batteries, require special manufacturing methods and equipment. It is particularly important to provide a process for providing electrical connections between the plate-to-plate connections and between the independent plates in the housing of the large battery and the connection to the outside of the battery housing. Due to battery failure due to improper connections between the plates, shorts in the battery housing, or even severe failures, pressure buildup can cause cell or housing failure and result in environmental and safety hazards have.

Additional considerations arise regarding providing an efficient and cost-effective automated battery manufacturing process while maintaining production reliability. The ideal process is to minimize material requirements and energy input during manufacturing while at the same time ensuring that the risk of failure of the battery product is eliminated. While these characteristics provide battery manufacturers with the goal of modernizing battery manufacturing, many previous efforts to provide an optimal balance between efficiency and reliability have not added much in the art, Only improvement has been provided.

In general, the casting operation is accomplished simultaneously for all cells of the battery located in a mold with an inverted mirror image, otherwise the cells will be oriented differently than the orientation they should have in the final battery cell structure . The stacked cell elements are clamped together with the adjacent downward extending plate lugs. A plurality of suitably oriented mold cavities may be pre-heated to provide the desired strap shape.

A molten metal, usually lead (Pb) or an alloy consisting mostly of lead, may be used and will be continuously circulated along the channels adjacent to the mold cavity. The lead or molten metal in the channel is typically preheated in a reservoir and then pumped into a channel, which is typically located beneath the mold.

Once the desired conditions are reached, the molten metal is pumped into the channel adjacent to the mold until the height is elevated and flows past the weirs disposed between the channel and the respective mold cavity. The molten metal thereby fills the mold cavities and then the molten metal pumped into the mold to the height above the weir is recovered and is thereby retracted to a height below the upper end of the dam.

Typically, the height of the molten metal in the channel is maintained between a predetermined set of parameters. If it is desired to overflow the dam, it will be raised to about 12 mm above the bottom of the channel, and if recovered, the height will be about 6 mm from the bottom of the channel. Some systems require the molten metal to be circulated continuously into and out of the storage vessel. Others are raised into the mold cavity to an overflowing height, and then the pump constituent molten metal is formed from the reservoir to the channel.

The heat energy sources are removed and the cell plate assemblies clamped in the desired relative orientation with respect to each other immerse some of the plate connecting lugs on each plate into the melt mass in the appropriate connector strap mold cavity to melt Metal connection. Subsequently, as the water flows through one or more portions of the mold body, the cavities are cooled and the contact of the mold cavity wall with the cooling water cools the molten lead, causing the molten lead to solidify.

In most cases, the mold cavities are maintained at a constant temperature by a water jacket that selectively cools the mold cavities as needed or when directed by a thermocouple monitoring the mold temperature. Cooling of the molten metal coagulates the metal around the lug. After the molded strap and the post are sufficiently solidified, they are extracted from the mold with the lugs of the battery cell plates fused or welded to the metal (lead) strap, thereby providing the necessary electrical and mechanical connections between them .

For mass production, the procedures described above are typically run in repetitive cycles to provide commercial efficiency. It is ideal to minimize the cycle time, i.e. the time from when the previously completed strap is removed to the time when the next strap is completed, to achieve maximum production within the available time. The efficiency obtained by providing optimal manufacturing parameters results from a number of contributing factors, including the required labor, time and material reduction. It has been found that a significant portion of the cycle time is associated with the heating and cooling portions of the mold body. Minimizing the amount of time the lead must remain in the molten state reduces the total heat input to the system. Also, if the amount of lead to be melted and to minimize the amount of lead to be cooled is to be minimized, the thermal energy input and cooling capacity will also be reduced, which will result in a concomitant decrease in cycle time, material cost, processing cost, and the like.

Optimal production parameters suggest that the channel walls should not be cooled to such an extent that welding of straps, taps or posts, i.e., molten metal flow, during solidification or freezing, is interrupted.

This allows molten lead present in the flow channels adjacent to the mold assembly to flow freely from the lead channels into the mold cavity. In order to keep the energy input at a desired level, a minimum precision of temperature control of the mold assembly is required.

Nevertheless, cooling of the entire mold, including weirs, causes the solidification of the molten metal at unnecessary locations, as described below. Better control of the local temperature in the mold assembly is desirable to allow the post, especially the terminal posts, to cool down at least as fast as the smaller strap portion, since slow cooling of the posts can result in mechanically weak terminals.

Mold cost is an important factor in the type of machine being considered. Without sacrificing one of the other factors that apply to the production process and system, it is difficult to obtain an appropriate cast that can be produced in large quantities in mold form. These results may lead to an increase in some costs or other costs on costs, labor, materials, energy, etc., to improve other points in the process, such as, for example, the cycle period, will be. The various cell and terminal configurations required in large lead-acid batteries also complicate the mold design, impairing the efficiency that can be achieved by changing one or more process parameters.

Prior art methods and systems for providing battery straps and post cast-on machines are described, for example, in U.S. Patent Nos. 3,718,174 and 3,802,488, issued February 27, 1973, and April 9, , Both of which are inventors Donald R. Hull and Robert D. Simonton.

Here, a laminated battery plate for a plurality of cells constituting a lead-acid storage battery and a system having separate connecting lugs for each of the positive and negative plates of each cell interconnected by the separator and the cast- And machine are described. In addition, an inter-cell connection or terminal post cast is provided for simultaneous casting in an integral part of each strap. This type of conventional design is described earlier.

Conventionally, a technique for a mold of a strap is disclosed in a 'mold for a battery cast-on strap' of Patent Publication No. 2012-0106826. The above-described prior art has been proposed to reduce the amount of heat energy input as a process for manufacturing a strap.

However, in this conventional technique, the molten metal 50 (lead) injected into the manifold is transferred to the strap metal mold to form the strap. However, since the lava 50 is hardened over time, injection and molding of the lava 50 must be performed in a short period of time. Such a conventional strap-molding mold apparatus is as shown in Figs. 1 and 2. Fig.

Fig. 1 is a plan view showing a conventional strap mold, and Fig. 2 is a cross-sectional view of a conventional strap mold.

1 and 2, a conventional strapping metal mold includes an injection unit 10 for injecting the molten metal 50, a transfer unit 20 for transferring the molten metal 50, And a strap forming part 40 for forming a strap by the molten metal 50 filled in the storing part 30, (40).

The injection unit 10 includes an injection port 11 for injecting a molten liquid 50 in a liquid state as an injection port 11 of the molten metal 50 and a transfer port 11 extending in both directions from the injection port 11, And a branch path (12) for branching the path so as to move the eluent (50). The injection port 11 and the branch passageway 12 extend to the inside of the mold and the branch passageway 12 extends to the lower side of the two side storage portions 30. [

The transfer unit 20 supplies the molten metal 50, which is transferred from the inside of the mold through the branch passage 12, to the storage unit 30. The storage unit 30 includes a guide hole 21 extending downward from a pair of storage units 30 opposed to each other at both sides and a branch wall 22 between the guide holes 21.

The storage unit 30 is installed so that a pair of the storage units 30 are opposed to each other and connected to the strap forming unit 40 at each side thereof to transmit the molten metal 50. The transfer unit 20 includes at least one discharge port 31 communicating with the guide hole 21 at the bottom surface 32 and a discharge port 31 projecting upwardly between the strap forming unit 40 and the storage unit 30 And protruding jaws, respectively.

In the conventional strapping mold apparatus, the molten metal 50 injected through the injection port 11 branches off from the branch passage 12 and flows into the storage section 30 through the guide holes 21 on both sides, . At this time, the storage section 30 is filled with the molten metal 50 while the molten metal 50 is discharged through the discharge port 31 and spreads inward.

Here, since the molten liquid 50 has a high liquid viscosity, it gradually spreads through the discharge port 31, so that the height of the discharge port 31 gradually increases from the main surface. The molten metal 50 gradually filled up is supplied to the strap forming unit 40 only when the amount of the molten metal 50 exceeds the protruding jaw.

However, as described above, the conventional strapping mold apparatus can be cured while being filled in the storage unit 30 according to the characteristics of the molten metal 50, so that the amount of the filler in the storage unit 30 and the strap forming unit 40 as a whole is uniform I can not. This is because the pressure of the molten metal 50 discharged from the guide hole 21 located at the injection part 10 side and the molten metal 50 discharged from the guide hole 21 farthest from the injection part 10 side Since there is a difference according to the length of the guide hole 21, there is a large difference in the pressure and time to be discharged, so that a uniform amount of the molten metal 50 can not be filled.

SUMMARY OF THE INVENTION The present invention has been made to solve the above conventional problems, and it is an object of the present invention to provide a strap mold apparatus in which a lid is provided on an upper part of a mold so that a molten laden- And a cover capable of pressing the molten metal discharged from the upper part to increase the speed of spreading from the inside in a short period of time.

The present invention includes the following embodiments in order to achieve the above object.

The first embodiment of the present invention is an injection molding machine comprising: an injection unit for branching and supplying molten metal injected from an injection port extending inward from a tip end of a metal mold; A transfer part extending in both directions from the inside of the mold to transfer the molten metal supplied from the injection part from the inside; At least one discharge port through which discharge of molten iron is discharged from the transfer section on the bottom surface is formed as one or more rows, and a storage section filled with molten metal discharged through the discharge port; A strap forming part in which at least one stretch is formed in one direction of the storage part to supply and form molten metal in the storage part; And a lid fixed to one end of the storage unit and the upper side of the other side boundary of the strap forming unit and the storage unit to press the molten metal discharged from the discharge port.

In the second embodiment of the present invention, the storage unit further includes a boundary jaw protruding upwardly from the strap forming unit.

In the third embodiment of the present invention, the discharge orifices are arranged as one or more columns, and the one or more columns are installed in a mutually opposing position and number.

According to a fourth aspect of the present invention, the lid includes a seating groove formed to be bent inward from a lower surface of one side, and the storage unit includes an insertion protrusion protruding upward to be inserted into the seating groove at one end.

In the fifth embodiment of the present invention, the lid is positioned such that an end of a lower surface of the lid is spaced apart from an upper side of the boundary rim, and lava discharged from the lid is transferred to the strap forming unit .

As described above, since the lid discharged from the upper surface of the storage portion for supplying the ladle to the strap forming portion is pressed at the upper portion of the ladle discharged from the upper portion, the speed of the ladle can be increased to the inside of the storage portion, There is an effect that can be filled.

1 is a plan view of a conventional strap mold apparatus,
2 is a cross-sectional view of a conventional strap mold apparatus,
3 is a plan view showing a mold apparatus having a lid according to the present invention,
4 is a sectional view of a mold apparatus having a cover according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a mold apparatus having a cover according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a plan view showing a mold apparatus having a lid according to the present invention, and FIG. 4 is a sectional view of a mold apparatus having a lid according to the present invention. The same elements as those in the conventional art are denoted by the same reference numerals.

3 and 4, a mold apparatus having a lid 60 according to the present invention includes an injection unit 10 into which a molten metal 50 is injected, and a molten metal injection unit 10 through which molten metal 50 injected from the injection unit 10 is guided A storage unit 30 for storing the molten metal 50 transferred from the transfer unit 20 and a strap 50 for molding the strap with the molten metal 50 supplied from the storage unit 30, And a lid 60 which is located on the upper surface of the storage part 30 and presses the molten metal 50 discharged from the storage part 30 through the discharge opening 31. The lid 60 is provided on the upper surface of the storage part 30.

The injection unit 10 includes an injection port 11 for injecting a molten liquid 50 in a liquid state as an injection port 11 of the molten metal 50 and a transfer port 11 extending in both directions from the injection port 11, And a branch path (12) for branching the path so as to move the eluent (50). The injection port 11 extends to the inside of the mold and the branch path 12 extends from the injection port 11 to the both-side transfer part 20.

The transfer unit 20 supplies the molten metal 50, which is transferred from the inside of the mold through the branch passage 12, to the storage unit 30. The transfer unit 20 includes at least one guide hole 21 extending in the longitudinal direction from a lower side of a pair of storage units 30 opposed to each other at both sides of the storage unit 30, A branch wall 22 for branching the molten metal 50 delivered from the branch passage 12 and a connection hole 23 extending upward from the guide hole 21 and connected to the discharge port 31 do.

That is, at least two guide holes 21 extend parallel to the lower side of the storage part 30, and the branch wall 22 is formed therebetween. Therefore, the lean burner 50 is branched through the branch passage 12 and is moved to the side of the storage portion 30 on both sides, and is branched again by the branch wall 22 on the lower side of the storage portion 30 on one side and the other side. And both of them are transmitted to the guide holes 21.

Here, the guide hole 21 is extended so that at least two of the guide holes 21 are parallel to each other.

The connection holes are connected to one or more discharge ports 31 formed on the bottom surface 32 of the storage part 30 so as to be inclined upward in the guide hole 21. Accordingly, the connection hole transfers the discharged liquor (50) supplied from the guide hole (21) to the discharge port (31) and discharges it.

The storage unit 30 is installed so that a pair of the storage units 30 are opposed to each other and connected to one or more strap forming units 40 on one side to transmit the molten metal 50. The storage part 30 is connected to the connection hole and is connected to the strap forming part so as to protrude upward as an interface between the discharge opening 31 for discharging the debris 50 and the strap forming part, And a boundary step 33 for allowing the molten metal 50 to be transferred to the forming part 40.

The discharge port 31 is extended from the bottom surface 32 of the storage part 30 and extends from the connection hole extending from the guide hole 21 to the storage part 30 (Not shown). At this time, since the discharge pressure of the molten metal 50 is higher as the distance from the starting end of the guide hole 21, that is, the injection unit 10, is higher and the discharge pressure is lower as the distance is longer, The speed and time at which the molten metal 50 comes into contact with the entire area of the portion 30 are different from each other. Therefore, the discharge port 31 extends in two rows, one side closer to the injection unit 10 side, and the other side near the discharge unit 10, It is preferable that the time and the speed of the molten metal 50 discharged from the storage part 30 are made uniform by forming at least one on the remote side instead of forming the molten metal.

The bottom surface 32 of the storage part 30 divides the entire section into three sections and sets the sections A, B, and C according to the distance from the injection section 10.

The first section is a section where the distance from the injection port 11 is near and the discharge pressure of the discharge port 31 is the highest. The third section is the section that is the longest distance from the injection port 11, do. The second interval B is shorter than the first interval A and longer than the third interval C between the first interval A and the third interval C,

That is, the discharge port 31 of the first column 311 is formed in the first section A near the injection section 10 and the third section C at the end, and the middle second section B).

The number of the ejection openings 31 of the second row 312 is smaller in the first section A and the third section C than in the second section B.

The discharge port 31 is formed of the first column 311 and the second column 312 and the numbers and arrangement of the respective discharge ports 31 are formed to be opposite to each other so that the discharge pressure of the discharged- So that it can be uniformly filled in the storage part 30. [

The boundary jaw 33 protrudes upward from the bottom surface 32 of the storage portion 30 as a boundary between the strap forming portions 40 in a plurality of passages extending laterally in the storage portion 30. [ .

Since the molten metal 50 has a high viscosity, it does not directly go to the strap forming unit 40 even if it has a higher water level than the boundary step 33. This is because the debris 50 has a viscosity, so that the water surface is filled with a convex curved surface, and the debris 50 to be filled later spreads laterally.

However, according to the present invention, the lid 60 may be provided to pressurize the molten metal 50 filled in the storage portion 30 and to pass to the boundary jaw 33, and to spread to the left and right in the storage portion 30 To increase the speed. This is as shown in the attached FIG.

The cover 60 is mounted on the upper surface of the storage unit 30 and is installed such that one side of the cover 60 overlies the upper end of one side of the storage unit 30 and the other side is positioned on the upper side of the boundary jaw 33. At this time, an empty space may be formed between the upper surface of the other side of the lid 60 and the upper side of the boundary jaw 33 so that the drainage 50 can be moved.

The lid 60 may further include a seating groove 61 formed to be bent inwardly from a lower surface so as to be fixed to the upper end of the storage unit 30. [ The storage unit 30 further includes an insertion protrusion 34 inserted into the seating groove 61 at one upper end thereof to fix the lid 60.

The other side of the lid 60 is positioned above the boundary jaw 33 of the storage part 30. At this time, the cover (60) and the boundary jaw (33) are positioned to be spaced apart to form a passage through which the drainage (50) is moved.

Therefore, the discharged water 50 is discharged through the discharge port 31 and then filled inside the storage part 30, so that the water level is raised. The vertex of the lava 50 is closely attached to the lower surface of the lid 60 so that the pressure of the discharge port 31 and the fixed force of the lid 60 collide with each other, So that a uniform amount of the molten metal 50 can be filled in the entire area of the storage part 30 within a predetermined time.

In addition, the molten metal 50 is transferred to the strap forming unit 40 over the boundary jaw 33 while being filled in the storage unit 30 by the pressure of the lid 60. As described above, the discharge port (31) sets the number of the discharge port (31) in accordance with the position of the bottom surface (32) of the storage part (30) The upper surface of the storage unit 30 can be pressed through the opening 60 to be filled with a uniform amount so that the molten metal 50, which is moved to the strap forming unit 40, can also be delivered in a uniform amount.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

10: injection part 11: injection port
12: Branch to 20:
21: guide hole 22: branch wall
30: storage part 31: discharge port
32: bottom surface 33: boundary chin
34: insertion protrusion 40: strap forming part
50: Drain 60: Cover
61: seat groove

Claims

An injection part for branching and supplying molten metal injected from an injection port formed inwardly from a tip end of a mold;
A transfer part extending in both directions from the inside of the mold to transfer the molten metal supplied from the injection part from the inside;
At least one discharge port through which discharge of molten iron is discharged from the transfer section on the bottom surface is formed as one or more rows, and a storage section filled with molten metal discharged through the discharge port;
A strap forming part in which at least one stretch is formed in one direction of the storage part to supply and form molten metal in the storage part; And
And a cover which is fixed to one end of the storage part and the upper side of the other side boundary of the strap forming part and the storage part and presses the molten metal discharged from the discharge port.

The apparatus of claim 1, wherein the storage unit
And a lid protruding upwardly from the strap forming part.

The apparatus of claim 1, wherein the ejection orifices are aligned as one or more rows,
Wherein the at least one row has a position and a number mutually oppositely arranged.

2. The apparatus according to claim 1,
And a seating groove formed to be bent inwardly from a lower surface of one side,
Wherein the storage unit includes a cover including an insertion protrusion protruding upward to be inserted into the seating groove at an upper end of the storage unit.

5. The method according to claim 1 or 4,
And the other end is positioned such that an end of the lower surface is spaced apart from an upper side of the boundary jaw so that molten metal filled in the storage portion is transmitted to the strap forming portion.