CA1233306A - Process and apparatus for the plastic injection coating of cell poles of finished plate groups - Google Patents
Process and apparatus for the plastic injection coating of cell poles of finished plate groupsInfo
- Publication number
- CA1233306A CA1233306A CA000491223A CA491223A CA1233306A CA 1233306 A CA1233306 A CA 1233306A CA 000491223 A CA000491223 A CA 000491223A CA 491223 A CA491223 A CA 491223A CA 1233306 A CA1233306 A CA 1233306A
- Authority
- CA
- Canada
- Prior art keywords
- poles
- pole
- plastic
- hollow
- cell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
- B29C45/14426—Coating the end of wire-like or rod-like or cable-like or blade-like or belt-like articles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/172—Arrangements of electric connectors penetrating the casing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C2045/1486—Details, accessories and auxiliary operations
- B29C2045/14934—Preventing penetration of injected material between insert and adjacent mould wall
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14311—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles using means for bonding the coating to the articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
- Y10S425/005—Cammed
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/02—Other than completely through work thickness
- Y10T83/0304—Grooving
- Y10T83/0311—By use of plural independent rotary blades
- Y10T83/0326—Blades turning about perpendicular axes
Landscapes
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Filling, Topping-Up Batteries (AREA)
- Manufacturing Of Electrical Connectors (AREA)
Abstract
Abstract of the Disclosure The cell poles of an electric battery, which have already been cast on a fully assembled plate group which is fixed in proper position for mounting in a holding box, are provided with a plastic coating using a dual injection mold which matches the predetermined distance between the poles.
After the two mold halves are closed over the poles, a plastic melt is injected into cavities corresponding to the poles, which plastic is at the same time prevented from escaping from the mold by a gasket at the base of each cell pole, and a movable slide at the forwardmost end of each cell pole.
After the two mold halves are closed over the poles, a plastic melt is injected into cavities corresponding to the poles, which plastic is at the same time prevented from escaping from the mold by a gasket at the base of each cell pole, and a movable slide at the forwardmost end of each cell pole.
Description
( I 36 ( ` ` Jo -PROCESS AND APPARATUS FOR TIE PL~STLC INJECTION - Jo COSTING OF CELL POLES OF FINISHED PLATE GROUPS --I background of the invention I-:
. - :
-The present invention relates generally to the -application of plastic coatings to the bodies of the cell poles of an electric battery, particularly cell poles which have been cast in unitary combination with a completely assembled plate group held in proper position for mounting within a holder.
` Lead cell poles have-long been used to make electrical connections in electric batteries. In order to promote a good snug fit between the cell poles and the container cover through which they pass, such cell poles are advantageously provided with a plastic coating and passed through a tube o- appropriate diameter provided in the cover in such a way that the required `
tightness for a proper fit is assured as a result of the frictional contact developed between the pole coating and the plastic material of the tube. Such pole sealing is known, for - example, from DEMOS No. 27 57 568t and represents an improvement over conventional pole sealing techniques wherein lead bushes are recessed or injection-molded in the cover and later welded to the pole body, a process which is usually cumbersome and 0 which must take place after assembly of the battery.
, ` The impetus to steadily reduce the time required to . manufacture a ~atteryJ as a consequence of an increasing level of automation, has led to the development of means for casting the connecting straps and cell poles, including the pole inserts lmaAe, for example, from brass), directly onto plate groups which have previously been completely assembled and placed within a holler in proper position for subsequent mounting in i I'' .. .. . .. ..
33~3~
ye cell container, ail in a single operation according to a -;-- modified cast-on-strap (COY) process. However, this process eliminates the possibility of subsequent individual processing - o-f the cell poles because the poles, which are spaced closely to one another, represent a mutual obstacle to one another. This makes the plastic injection coating of such cells poles especially difficult Thus, the present invention has as its primary object to provide a process which permits the plastic injection coating of the bodies of cell poles in a reliable and efficient manner, and an apparatus for carrying out such a process.
.
Summary of the Invention - ' , :' This and other objects are achieved in accordance with the present invention by taking a completely assembled plate group which is held in proper position within a holding box, and then cutting grooves into the pole bodies in those regions which are to be coated with plastic, using an appropriate cutter;
moving the holding box with the poles projecting forward toward .
an injection mold which receives the poles in matching hollow mold cavities; sealing off the poles at both their front end and near their bases along the circumference of their bodies so that a sealed annular gap is developed between each pole body and the hollow mold cavity which surrounds it; and filling the annular I-gap with a plastic melt by means of injection -An especially advantageous pretreatment of the lead poles within the framework of the present invention resides in the preparation of circumferential recesses or grooves in the initially smooth pole bodies. This creates a means for securely -I - .. . ....
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anchoring the plastic coating and also develops a tony, contorted path which offers protection against the leakage of electrolyte. A multiple-thread cutter mounter in a cutting heat is advantageously used to cut the series of grooves in each cell pole. Coccal aligning the cutting head with a pole to be cut serves to rotate the multiple-thread cutter perpendicular to the pole and parallel to the pole axis, cutting into the surface of the pole body under a radially inwardly directed pressure. The cutting process is then repeated at the second of the cell poles provided, according to a fixed cycle, by retracting the holding box together with the plate group from the cutter and, after a lateral shift by one pole distance, again -feeding the plate group to the tool.
For further detail regarding this pretreatment of the poles, as well as the plastic injection coating process which is used according to the present invention, reference is made to the discussion below with reference to the following illustrations.
. . .
Brief description of the drawings - - - .
.
foggier 1 it a schematic view showing the grooving of the cell poles.
Figure 2 is an isometric view of an injection mold used - in coating the poles according to the present invention.
Figure 3 is a cross-sectional view showing the positioning of a cell pole in the injection mold. ;
Figure 4 is an enlarged elevation Al view of those portions of the injection mold which are shown at IV in Figure 2 I- I.-'-' . ,.. .
''.''~
In the several views provided, like reference numerals -I
, , Jo denote similar structure.
Detailed Description of a Preferred Embodiment `-figure 1 schematically illustrates a completely -assembled plate group held in proper position for mounting within a holding box or fixture (not shown). This plate group is represented by the sectioned lugs 3 of the positive and negative plates of the plate group, which are encapsulated within connecting straps 2 in accordance with known ``
cast-on-strap (COST manufacturing techniques. Also associated with the straps 2 are cell poles 1 which extend from the plate group as shown. As it conventional, the cell poles 1 have smooth outer surfaces, resulting from the casting process.
A multiple-thread cutter 5 is mounted within a head my 15 for movement with respect to the pole I In this regard, the -cutter 5 is mounted so as to be approximately perpendicular to the periphery of the pole I while the head 4 is substantially coaxial with the pole I Thus the cutter 5 is capable of being rotated in the direction of the arrow shown in Figure 1, first about one of the poles 1 and then about the other, leaving a series of recesses 6 in each of the pole bodies after these cutting operations. -dual injection mold, comprised of two mold halves 7, is provided in accordance with the present invention for the subsequent injection coating of the pole bodies with plastic.
Referring to Figure 2, each mold half 7 is generally comprised of two hollow, semi-c~lindrical mold cavities corresponding Jo each of the poles 1. The cavities 8 are spaced apart so that : . ,. .: .
' ' ' - `
- ' ` - ` ' : :
, . .
e cell poles 1, which are separated by a known and fixed I, -7 distance, can be simultaneously inserted into the hollow cavities 8. The interior radius of the cavities 8 is treater than the radius of each pole body 1, by an amount corresponding to the desired thickness of the plastic coating to be prepared.
At the point of entry, the cavities 8 are narrowed to approximate the cross-section of each pole body 1 by gaskets 10 having circumferential elevations 9, so that the poles 1 are sealed near their base; along the circumference of the pole body, after their introduction into the cavities I The forward most ends of the poles 1 are also sealed to provide a sealed annular enclosure surrounding each of the poles 1. To this end, the hollow cavities 8 of the injection mold 7 extend into cup shaped extensions 11 (injection cavities) of reduced diameter, within which cylindrical slides 12 can be moved coccal relative to the hollow cavities. The slide 12 is shown in the retracted position in Figure 3. As a result, the slides 12 are capable of being pressed against the forward most face of the pole 1 as it reaches the end of the hollow cavity 8, as is shown in Figure 3. A ring-shaped cutting edge 13 associated with each ox the slides 12 cuts slightly into the relatively soft lead face of each pole thereby establishing an end seal. A recess 14 provided in the end of each slide 12 serves to receive the projecting end of the pole insert 15 25 associated with each of the cell poles 1. -The hollow cavities 8 are additionally provided with circumferential recesses 15 on their internal walls, which recesses are capable of being filled with the injection molding composition to form unnatural molded sealing lips which are important in assuring tight passage of the coated cell pole through the tube which is provided in the cover of the battery. -r ',;~,~
o permit the injection of such plastic materials, the two I-, hollow cavities 8 communicate with each other via inaction -; i :
channels 18, which branch off from a common plastic feed pipe -17. With reference to Figure 4, free spaces 19 are provided at the seam of the injection mold, to receive chips which may be produced in processing the cell poles 1 for injection coaxing.
The injection coating process according to the present invention proceeds as follows. The two halves 7 of the injection mold are closed against the cell poles 1, simultaneously scaling each of the pole bodies at their base by means of the gaskets 10, and at their end by forward movement of the cylindrical slides 12. Subsequent injection ox the plastic melt into the hollow cavities 8 fills the ring shaped gap developed between the pole body 1 and the interior wall of the hollow cavity 8 which surrounds it. Thwarter, the cylindrical slides 12 are retracted and the halves 7 of the injection mold are opened, releasing the coated cell poles from the mold.
A particular advantage of this process is that it is focused on the dimensions of the finally assembled battery I.
-cell, which dimensions are in turn determined by the holding box for the finished plate group. Thus, tolerances in the distance between the poles and in the pole diameters are maintained at reduced values.
Although the present invention is described in connection with cell groups which have been produced by a cast-on-strap (COST process, and wherein each of a pair ox cell poles are simultaneously provided with a plastic kowtowing in a single molding operation, it is to be understood that aspects of the present invention will also find applicability to other battery manufacturing techniques as well as to the application of plastic coatings to individual cell poles.
I
It Jill therefore be understood that various changes in the details, materials and arrangement of parts which have been : :: herein described and illustrated in order to explain the nature of this invention may be made by those skilled in the art within -the principle and scope of the invention as expressed in the following claims.
. . .
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. - :
-The present invention relates generally to the -application of plastic coatings to the bodies of the cell poles of an electric battery, particularly cell poles which have been cast in unitary combination with a completely assembled plate group held in proper position for mounting within a holder.
` Lead cell poles have-long been used to make electrical connections in electric batteries. In order to promote a good snug fit between the cell poles and the container cover through which they pass, such cell poles are advantageously provided with a plastic coating and passed through a tube o- appropriate diameter provided in the cover in such a way that the required `
tightness for a proper fit is assured as a result of the frictional contact developed between the pole coating and the plastic material of the tube. Such pole sealing is known, for - example, from DEMOS No. 27 57 568t and represents an improvement over conventional pole sealing techniques wherein lead bushes are recessed or injection-molded in the cover and later welded to the pole body, a process which is usually cumbersome and 0 which must take place after assembly of the battery.
, ` The impetus to steadily reduce the time required to . manufacture a ~atteryJ as a consequence of an increasing level of automation, has led to the development of means for casting the connecting straps and cell poles, including the pole inserts lmaAe, for example, from brass), directly onto plate groups which have previously been completely assembled and placed within a holler in proper position for subsequent mounting in i I'' .. .. . .. ..
33~3~
ye cell container, ail in a single operation according to a -;-- modified cast-on-strap (COY) process. However, this process eliminates the possibility of subsequent individual processing - o-f the cell poles because the poles, which are spaced closely to one another, represent a mutual obstacle to one another. This makes the plastic injection coating of such cells poles especially difficult Thus, the present invention has as its primary object to provide a process which permits the plastic injection coating of the bodies of cell poles in a reliable and efficient manner, and an apparatus for carrying out such a process.
.
Summary of the Invention - ' , :' This and other objects are achieved in accordance with the present invention by taking a completely assembled plate group which is held in proper position within a holding box, and then cutting grooves into the pole bodies in those regions which are to be coated with plastic, using an appropriate cutter;
moving the holding box with the poles projecting forward toward .
an injection mold which receives the poles in matching hollow mold cavities; sealing off the poles at both their front end and near their bases along the circumference of their bodies so that a sealed annular gap is developed between each pole body and the hollow mold cavity which surrounds it; and filling the annular I-gap with a plastic melt by means of injection -An especially advantageous pretreatment of the lead poles within the framework of the present invention resides in the preparation of circumferential recesses or grooves in the initially smooth pole bodies. This creates a means for securely -I - .. . ....
-'I'' 'I
I vç
I.' ' '' ' ' ' ''-'I
..... .... . _ . _ .. . _ _. -- -- =
anchoring the plastic coating and also develops a tony, contorted path which offers protection against the leakage of electrolyte. A multiple-thread cutter mounter in a cutting heat is advantageously used to cut the series of grooves in each cell pole. Coccal aligning the cutting head with a pole to be cut serves to rotate the multiple-thread cutter perpendicular to the pole and parallel to the pole axis, cutting into the surface of the pole body under a radially inwardly directed pressure. The cutting process is then repeated at the second of the cell poles provided, according to a fixed cycle, by retracting the holding box together with the plate group from the cutter and, after a lateral shift by one pole distance, again -feeding the plate group to the tool.
For further detail regarding this pretreatment of the poles, as well as the plastic injection coating process which is used according to the present invention, reference is made to the discussion below with reference to the following illustrations.
. . .
Brief description of the drawings - - - .
.
foggier 1 it a schematic view showing the grooving of the cell poles.
Figure 2 is an isometric view of an injection mold used - in coating the poles according to the present invention.
Figure 3 is a cross-sectional view showing the positioning of a cell pole in the injection mold. ;
Figure 4 is an enlarged elevation Al view of those portions of the injection mold which are shown at IV in Figure 2 I- I.-'-' . ,.. .
''.''~
In the several views provided, like reference numerals -I
, , Jo denote similar structure.
Detailed Description of a Preferred Embodiment `-figure 1 schematically illustrates a completely -assembled plate group held in proper position for mounting within a holding box or fixture (not shown). This plate group is represented by the sectioned lugs 3 of the positive and negative plates of the plate group, which are encapsulated within connecting straps 2 in accordance with known ``
cast-on-strap (COST manufacturing techniques. Also associated with the straps 2 are cell poles 1 which extend from the plate group as shown. As it conventional, the cell poles 1 have smooth outer surfaces, resulting from the casting process.
A multiple-thread cutter 5 is mounted within a head my 15 for movement with respect to the pole I In this regard, the -cutter 5 is mounted so as to be approximately perpendicular to the periphery of the pole I while the head 4 is substantially coaxial with the pole I Thus the cutter 5 is capable of being rotated in the direction of the arrow shown in Figure 1, first about one of the poles 1 and then about the other, leaving a series of recesses 6 in each of the pole bodies after these cutting operations. -dual injection mold, comprised of two mold halves 7, is provided in accordance with the present invention for the subsequent injection coating of the pole bodies with plastic.
Referring to Figure 2, each mold half 7 is generally comprised of two hollow, semi-c~lindrical mold cavities corresponding Jo each of the poles 1. The cavities 8 are spaced apart so that : . ,. .: .
' ' ' - `
- ' ` - ` ' : :
, . .
e cell poles 1, which are separated by a known and fixed I, -7 distance, can be simultaneously inserted into the hollow cavities 8. The interior radius of the cavities 8 is treater than the radius of each pole body 1, by an amount corresponding to the desired thickness of the plastic coating to be prepared.
At the point of entry, the cavities 8 are narrowed to approximate the cross-section of each pole body 1 by gaskets 10 having circumferential elevations 9, so that the poles 1 are sealed near their base; along the circumference of the pole body, after their introduction into the cavities I The forward most ends of the poles 1 are also sealed to provide a sealed annular enclosure surrounding each of the poles 1. To this end, the hollow cavities 8 of the injection mold 7 extend into cup shaped extensions 11 (injection cavities) of reduced diameter, within which cylindrical slides 12 can be moved coccal relative to the hollow cavities. The slide 12 is shown in the retracted position in Figure 3. As a result, the slides 12 are capable of being pressed against the forward most face of the pole 1 as it reaches the end of the hollow cavity 8, as is shown in Figure 3. A ring-shaped cutting edge 13 associated with each ox the slides 12 cuts slightly into the relatively soft lead face of each pole thereby establishing an end seal. A recess 14 provided in the end of each slide 12 serves to receive the projecting end of the pole insert 15 25 associated with each of the cell poles 1. -The hollow cavities 8 are additionally provided with circumferential recesses 15 on their internal walls, which recesses are capable of being filled with the injection molding composition to form unnatural molded sealing lips which are important in assuring tight passage of the coated cell pole through the tube which is provided in the cover of the battery. -r ',;~,~
o permit the injection of such plastic materials, the two I-, hollow cavities 8 communicate with each other via inaction -; i :
channels 18, which branch off from a common plastic feed pipe -17. With reference to Figure 4, free spaces 19 are provided at the seam of the injection mold, to receive chips which may be produced in processing the cell poles 1 for injection coaxing.
The injection coating process according to the present invention proceeds as follows. The two halves 7 of the injection mold are closed against the cell poles 1, simultaneously scaling each of the pole bodies at their base by means of the gaskets 10, and at their end by forward movement of the cylindrical slides 12. Subsequent injection ox the plastic melt into the hollow cavities 8 fills the ring shaped gap developed between the pole body 1 and the interior wall of the hollow cavity 8 which surrounds it. Thwarter, the cylindrical slides 12 are retracted and the halves 7 of the injection mold are opened, releasing the coated cell poles from the mold.
A particular advantage of this process is that it is focused on the dimensions of the finally assembled battery I.
-cell, which dimensions are in turn determined by the holding box for the finished plate group. Thus, tolerances in the distance between the poles and in the pole diameters are maintained at reduced values.
Although the present invention is described in connection with cell groups which have been produced by a cast-on-strap (COST process, and wherein each of a pair ox cell poles are simultaneously provided with a plastic kowtowing in a single molding operation, it is to be understood that aspects of the present invention will also find applicability to other battery manufacturing techniques as well as to the application of plastic coatings to individual cell poles.
I
It Jill therefore be understood that various changes in the details, materials and arrangement of parts which have been : :: herein described and illustrated in order to explain the nature of this invention may be made by those skilled in the art within -the principle and scope of the invention as expressed in the following claims.
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: :. .
- - --, - : :
, ,, , .
- . - .
- : . :. .
.
- . , .
.
. . -I . . - .
-' - . .
.
.
.-- I; i, . , ` --~~
I . --I' I:
... . .. . . .... .. . .. . . .. . ....
Claims (9)
1. A process for the application of a plastic coating on body portions of the cell poles of an electric battery, after said pole bodies have been cast on a completely assembled plate group which is held in proper position for mounting in a holding box, said process comprising the steps of:
cutting circumferential grooves into the pole bodies in the region to be coated with plastic, by means of a cutter;
moving the holding box with the poles projecting forward toward an injection mold having matching hollow cavities for receiving the poles;
sealing off the poles at their forwardmost end and near their bases, along the circumference of their bodies, developing a ring-shaped gap between each pole body and the hollow cavity which surrounds it; and filling the ring-shaped gap with a plastic melt by injection.
cutting circumferential grooves into the pole bodies in the region to be coated with plastic, by means of a cutter;
moving the holding box with the poles projecting forward toward an injection mold having matching hollow cavities for receiving the poles;
sealing off the poles at their forwardmost end and near their bases, along the circumference of their bodies, developing a ring-shaped gap between each pole body and the hollow cavity which surrounds it; and filling the ring-shaped gap with a plastic melt by injection.
2. The process of claim 1 wherein the cutter is comprised of a cutter head which is capable of coaxial alignment with each pole, and a multiple-thread cutter attached to the cutter head and capable of rotating perpendicular to the axis of the pole.
3. The process of claim 2 wherein the multiple-thread cutter lies substantially perpendicular to the face of the pole, and is moved coaxially with respect to the pole by the cutter head.
4. The process of claim 1 wherein the plastic coating is provided with circumferential elevations directly molded with the coating.
5. A process for the application of a plastic coating on body portions of the cell poles of an electric battery, comprising the steps of: ' cutting circumferential grooves into the pole bodies in the region to be coated with plastic;
moving the holding box with the poles projecting forward toward an injection mold having cavities for receiving the poles, sealing off the poles both at their forwardmost end and near their bases, to develop a ring-shaped gap between each pole body and the hollow mold which surrounds it; and filling the ring-shaped gap with said plastic.
moving the holding box with the poles projecting forward toward an injection mold having cavities for receiving the poles, sealing off the poles both at their forwardmost end and near their bases, to develop a ring-shaped gap between each pole body and the hollow mold which surrounds it; and filling the ring-shaped gap with said plastic.
6. A device for providing body portions of the cell poles of an electric battery with a plastic coating in accordance with claim 1, said device comprising:
two mold halves, each having two hollow cylindrical mold cavities which correspond in shape to the poles and which are spaced from each other at the same distance as the poles, so that the cell poles can be pushed into said hollow cavities, wherein the interior radius of each hollow cavity is greater-than the radius of the pole body it is to receive by the thickness of the plastic coating to be provided;
a cup-shaped extension of reduced diameter extending from the hollow cavity and containing a cylindrical slide adapted for coaxial movement within the hollow cavity, to contact and seal the forwardmost ends of the cell poles by means of a ring-shaped cutting edge extending from the front face of the slide;
ring-shaped gaskets provided with circumferential elevations positioned at the point of entry of each hollow cavity and adapted to narrow the point of entry to the cross-section of each of the pole bodies;
circumferential recesses disposed over at least portions of the length of the interior walls of the hollow cavities; and injection channels in communication with the hollow cavities, and a common composition feed pipe.
two mold halves, each having two hollow cylindrical mold cavities which correspond in shape to the poles and which are spaced from each other at the same distance as the poles, so that the cell poles can be pushed into said hollow cavities, wherein the interior radius of each hollow cavity is greater-than the radius of the pole body it is to receive by the thickness of the plastic coating to be provided;
a cup-shaped extension of reduced diameter extending from the hollow cavity and containing a cylindrical slide adapted for coaxial movement within the hollow cavity, to contact and seal the forwardmost ends of the cell poles by means of a ring-shaped cutting edge extending from the front face of the slide;
ring-shaped gaskets provided with circumferential elevations positioned at the point of entry of each hollow cavity and adapted to narrow the point of entry to the cross-section of each of the pole bodies;
circumferential recesses disposed over at least portions of the length of the interior walls of the hollow cavities; and injection channels in communication with the hollow cavities, and a common composition feed pipe.
7. The device of claim 6 wherein free spaces are provided for receiving waste chips along seams of the mold halves.
8. A device for providing body portions of the cell poles of an electric battery with a plastic coating in accordance with claim 5, said device comprising:
two mold halves, each having at least one mold cavity which corresponds in shape to the cell poles so that the cell poles can be pushed into said hollow cavity, wherein the interior radius of each hollow cavity is greater then the radius of the pole body which it is to receive by the thickness of the plastic coating to be provided;
means for sealing the gap developed between the received pole body and the interior walls of the hollow cavity, at both ends of said cavity; and means for injecting said plastic into said gap.
two mold halves, each having at least one mold cavity which corresponds in shape to the cell poles so that the cell poles can be pushed into said hollow cavity, wherein the interior radius of each hollow cavity is greater then the radius of the pole body which it is to receive by the thickness of the plastic coating to be provided;
means for sealing the gap developed between the received pole body and the interior walls of the hollow cavity, at both ends of said cavity; and means for injecting said plastic into said gap.
9. The device of claim 8 wherein circumferential recesses are disposed over at least portions of the length of the interior walls of the hollow cavity.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3434900.6 | 1984-09-22 | ||
| DE19843434900 DE3434900A1 (en) | 1984-09-22 | 1984-09-22 | METHOD AND DEVICE FOR INJECT PLASTIC INJECTION OF CELL POLES ON FINISHED PLATE SETS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1233306A true CA1233306A (en) | 1988-03-01 |
Family
ID=6246126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000491223A Expired CA1233306A (en) | 1984-09-22 | 1985-09-20 | Process and apparatus for the plastic injection coating of cell poles of finished plate groups |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4769198A (en) |
| EP (1) | EP0175921B1 (en) |
| AT (1) | ATE53528T1 (en) |
| CA (1) | CA1233306A (en) |
| DE (2) | DE3434900A1 (en) |
| FI (1) | FI86157C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4948541A (en) * | 1988-10-27 | 1990-08-14 | Stephen Beck | Method of forming an arm rest for a chair having a tubular passageway for containing control mechanisms |
| US4969811A (en) * | 1989-06-07 | 1990-11-13 | C & L Plastics, Inc. | Apparatus for making plastic devices |
| FR2664431B1 (en) * | 1990-07-03 | 1996-09-13 | Lemer Fonderie | METHOD OF MANUFACTURING BUSHED TERMINALS FOR ACCUMULATOR BATTERY. |
| US5100311A (en) * | 1990-09-21 | 1992-03-31 | Dana Corporation | Coil locator for mold encapsulation |
| JPH08132456A (en) * | 1994-11-04 | 1996-05-28 | Yazaki Corp | Mold for waterproof wire molding |
| DE19509718A1 (en) * | 1995-03-10 | 1996-09-12 | Hagen Batterie Ag | Making positive tubular plates for lead acid accumulators with injected-on base strips |
| US6119543A (en) * | 1999-06-01 | 2000-09-19 | Teleflex Incorporated | Swivel insert remote control assembly and method of making same |
| KR100358680B1 (en) * | 2000-04-17 | 2002-10-30 | 주식회사 연산 | Method of coating a pole and the pole maked the same method |
| CN104943083B (en) * | 2015-06-23 | 2017-04-12 | 永高股份有限公司 | Electric melting die monorail type plastic piece built-in heating coil mechanism |
| AT518834B1 (en) * | 2016-08-04 | 2018-04-15 | Ing Hubert Rapperstorfer | Injection mold and method for applying plastic protective caps on inserts |
| CN108493473B (en) * | 2018-04-19 | 2024-02-13 | 贵州鸿兴时代动力新能源科技有限公司 | Battery injection molding equipment |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA740361A (en) * | 1966-08-09 | A. Gill Roy | Apparatus for and method of encapsulating objects | |
| GB130717A (en) * | 1918-06-29 | 1919-07-29 | Herbert Stuart Walker | Improvements in Tools for Chasing Screw Threads and in Holders therefor. |
| US3652340A (en) * | 1969-12-29 | 1972-03-28 | Bell Telephone Labor Inc | Apparatus for and method of forming post seal for lead-acid cell |
| US3799494A (en) * | 1972-05-11 | 1974-03-26 | Usm Corp | Multi-cavity molds |
| DE2757568C2 (en) * | 1977-12-23 | 1986-05-15 | Varta Batterie Ag, 3000 Hannover | Electric accumulator |
| US4235832A (en) * | 1978-07-31 | 1980-11-25 | Alden Research Foundation | Molding method |
| US4279850A (en) * | 1979-05-15 | 1981-07-21 | Lynch Paul E | Drill pipe tool joint protector |
| DE2947621C2 (en) * | 1979-11-26 | 1984-07-26 | WOCO Franz-Josef Wolf & Co, 6483 Bad Soden-Salmünster | Molding tool for overmolding an inserted insert, with an edge sealing profile |
| US4419796A (en) * | 1981-09-24 | 1983-12-13 | Honeywell Inc. | Method of making spin stabilized discarding sabot projectile |
| US4398785A (en) * | 1981-09-28 | 1983-08-16 | Essex Group, Inc. | Electrical connector and method of making same |
-
1984
- 1984-09-22 DE DE19843434900 patent/DE3434900A1/en not_active Withdrawn
-
1985
- 1985-08-21 DE DE8585110489T patent/DE3578144D1/en not_active Expired - Lifetime
- 1985-08-21 AT AT85110489T patent/ATE53528T1/en not_active IP Right Cessation
- 1985-08-21 EP EP85110489A patent/EP0175921B1/en not_active Expired - Lifetime
- 1985-09-03 US US06/771,969 patent/US4769198A/en not_active Expired - Lifetime
- 1985-09-20 FI FI853609A patent/FI86157C/en not_active IP Right Cessation
- 1985-09-20 CA CA000491223A patent/CA1233306A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE3434900A1 (en) | 1986-04-03 |
| ATE53528T1 (en) | 1990-06-15 |
| US4769198A (en) | 1988-09-06 |
| EP0175921B1 (en) | 1990-06-13 |
| FI86157C (en) | 1992-07-27 |
| FI86157B (en) | 1992-04-15 |
| FI853609A0 (en) | 1985-09-20 |
| EP0175921A3 (en) | 1988-01-27 |
| FI853609L (en) | 1986-03-23 |
| DE3578144D1 (en) | 1990-07-19 |
| EP0175921A2 (en) | 1986-04-02 |
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| Date | Code | Title | Description |
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| MKEX | Expiry |