CN108638412A - It can prevent the mould pressing method and molding tooling that cable protection layer overflows when molding - Google Patents
It can prevent the mould pressing method and molding tooling that cable protection layer overflows when molding Download PDFInfo
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- CN108638412A CN108638412A CN201810620017.5A CN201810620017A CN108638412A CN 108638412 A CN108638412 A CN 108638412A CN 201810620017 A CN201810620017 A CN 201810620017A CN 108638412 A CN108638412 A CN 108638412A
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- Prior art keywords
- cable
- molding
- elastic metallic
- cavity
- lower die
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- 238000000465 moulding Methods 0.000 title claims abstract description 58
- 238000003825 pressing Methods 0.000 title claims abstract description 15
- 229920001971 elastomer Polymers 0.000 claims abstract description 61
- 239000005060 rubber Substances 0.000 claims abstract description 61
- 239000010410 layer Substances 0.000 claims abstract description 22
- 239000011241 protective layer Substances 0.000 claims abstract description 20
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000000945 filler Substances 0.000 description 19
- 239000002184 metal Substances 0.000 description 19
- 229910052751 metal Inorganic materials 0.000 description 19
- 239000000463 material Substances 0.000 description 15
- 238000010586 diagram Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 238000004513 sizing Methods 0.000 description 10
- 238000000748 compression moulding Methods 0.000 description 9
- 230000005611 electricity Effects 0.000 description 4
- 238000004073 vulcanization Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
- B29C2043/181—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles encapsulated
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
- B29C2043/3602—Moulds for making articles of definite length, i.e. discrete articles with means for positioning, fastening or clamping the material to be formed or preforms inside the mould
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
- B29C2043/3671—Moulds for making articles of definite length, i.e. discrete articles preforms constituing part of the cavity mould wall
- B29C2043/3673—Moulds for making articles of definite length, i.e. discrete articles preforms constituing part of the cavity mould wall preform constituting a mould half
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/36—Plugs, connectors, or parts thereof
Abstract
The mould pressing method and molding tooling that cable protection layer overflows when molding can be prevented the invention discloses a kind of; wherein mould pressing method is respectively to add an elasticity half in upper and lower mould to cover; after upper and lower die button is combined; it is partly sleeved on the structure that cable peripheral part forms a resilient sleeve and cable composition interference fit using the elasticity in upper and lower mould, to fix cable；When causing cable to apply load to resilient sleeve inner cavity because of interference fit; using the Curvature varying of resilient sleeve come so that resilient sleeve carries out elastic dilatation outward; more cable outer layer rubbers are accommodated to increase the cavity volume of resilient sleeve, avoid cable protection layer spilling.Present invention rubber extra in being avoided that compared with the external rubber protective layer of thick cable line in molding overflows, and improves the quality of product.
Description
Technical field
The present invention relates to a kind of mould pressing method and molding tooling more particularly to it is a kind of can prevent molding when cable protection layer
The mould pressing method and molding tooling of spilling.
Background technology
Railway wagon brake cable is a kind of organizes into groups greatly in rail wagon brake system for quickly transmitting braking telecommunications
Number cable.As shown in Figure 1, actuator cable line end includes cable 1, is crimped on the gold on 2 end of conducting wire in cable 1
Belong to terminal 3, vulcanize the rubber protecting jacket 4 being wrapped in outside cable 1 and metal terminal 3.
When actuator cable line end is molded, three wire strippings in cable body end were come out before this, then will be golden
Belong to terminal compression joint on conducting wire, rubber protecting jacket vulcanization is wrapped in cable ontology and metal end finally by the mode of molding
On the outside of son, cable is connected with the conducting wire of the inside and metal terminal and fixes relative position.
When molding, as shown in Figures 2 to 4, lower die 5 is placed before this, lower half portion sizing material 6 is then placed in lower die 5, then
The cable 1 for having crimped metal terminal 3 and the die insert 7 being arranged in metal terminal end are placed into lower die 5（Figure
2）, then top half sizing material 9 is placed in upper mold 8（Fig. 3）, then upper mold 8 and lower die 5 are snapped together（Fig. 4）, then control
The upper and lower pressing plate of vulcanizer applies pressure to upper mold 8 and lower die 5, and under the effect of the pressure, sizing material flowing is full of upper die and lower die
Between cavity, finally vulcanization form end rubber protecting jacket.
In the prior art, as shown in figure 5, in order to ensure that the not axial float of cable 1, upper mold 8 and lower die 5 are formed by
It is necessary for being interference fitted between cavity and cable 1, but the diameter of cable 1 has tolerance, when the diameter of cable 1 exists
When the upper limit value of tolerance, i.e., when cable 1 is thicker, then the interference volume of its interference fit will be larger, at this time due to solid
Volume invariability, larger interference volume can pass through the rubber for causing rubber protective layer when molding outside cable 1 extra
Die joint overflows（At A in such as figure）, the rubber of spilling will be squeezed by upper and lower mould in molding it is bad, to reduce product
Quality.
By retrieval, same as the present application or similar patent document is not found temporarily.
To sum up, how to design it is a kind of can prevent molding when cable protection layer overflow mould pressing method and molding tooling, make
Its rubber extra in being avoided that compared with the external rubber protective layer of thick cable line in molding overflows, and the quality for improving product is anxious
The technical issues of need to solving.
Invention content
The technical problem to be solved by the present invention is to, provide a kind of to prevent from being molded in view of the deficiencies in the prior art
When cable protection layer overflow mould pressing method and molding tooling, molding when be avoided that compared with thick cable line external rubber protect
Extra rubber overflows in sheath, improves the quality of product.
In order to solve the above technical problems, the technical solution used in the present invention is：It is a kind of to prevent cable when molding from protecting
The mould pressing method that sheath overflows is respectively to add an elasticity half in upper and lower mould to cover, after upper and lower die button is combined, profit
It uses, the elastic structure for being partly sleeved on cable peripheral part and forming a resilient sleeve and cable composition interference fit in lower die,
To which cable be fixed；When causing cable to apply load to resilient sleeve inner cavity because of interference fit, resilient sleeve is utilized
Curvature varying make resilient sleeve carry out elastic dilatation outward, accommodate more electricity to increase the cavity volume of resilient sleeve
Cable outer layer rubber avoids cable protection layer spilling.
Preferably, it is the rubber sleeve of gear-like that the resilient sleeve, which uses elastic metallic set, the elastic metallic set,.
Preferably, after upper die and lower die snap together, elastic metallic covers the rubber that cavity diameter is less than outside cable
The diameter of compound protective layer, to form the structure of interference fit.
Invention additionally discloses it is a kind of can prevent molding when cable rubber protective layer overflow molding tooling, including upper mold and
Lower die is provided with the upper half arc-shaped cavity to form the upper impression of rubber protecting jacket and match with cable in the bottom of upper mold,
The lower half arc-shaped cavity for being provided with the lower impressions to form rubber protecting jacket at the top of lower die and matching with cable, in the upper of upper mold
It is provided with upper half elastic metallic set in half arc-shaped cavity, lower half elastic metallic set is provided in the lower half arc-shaped cavity of lower die, vulcanizes
When the top board of machine drives upper mold to be snapped together with lower die, pass through the upper half elastic metallic set and lower half arc in upper half arc-shaped cavity
Lower half elastic metallic set in shape chamber matches compression cable.
Preferably, upper half elastic metallic set and lower half elastic metallic set include half arc ontology, along half arc ontology
It is circumferential, it is provided with multiple notch on half arc body outer wall；When upper half elastic metallic set and lower half elastic metallic set are close in one
When rising, upper half elastic metallic set and lower half elastic metallic cover the gear-like elastic metallic set to be formed.
Preferably, the notch is triangle.
Preferably, when upper die and lower die snap together, the cavity that upper half arc-shaped cavity and lower half arc-shaped cavity are formed is ellipse
Circle, the short axle of oval cavity are equal to the largest outer diameter of gear-like elastic metallic set, and the long axis of oval cavity is more than gear-like bullet
The largest outer diameter of property metallic sheath.
Preferably, the upper mold is divided into upper left half module and upper right half module, and upper impression is arranged in the bottom of upper left half module,
Upper half arc-shaped cavity is arranged between the bottom of upper right half module, upper left half module and the top board of vulcanizer that there are gap, upper right half modules
Spring is provided between the top board of vulcanizer；Using upper left half module and lower die match to end rubber protecting jacket carry out at
Type is matched using upper right half module and lower die and cable is fixed.
Preferably, after upper die and lower die being snapped together, the distance between top board of upper right half module and vulcanizer is big
In the distance between the top board of upper left half module and vulcanizer.
Preferably, it is also respectively provided with the locating piece one of protrusion in the bottom of the bottom of upper left half module and upper right half module and determines
Position block two, at the top of the lower die on be additionally provided with respectively with the locating piece one and the matched locating slot one of locating piece two-phase and positioning
Slot two.
The beneficial effects of the present invention are：The present invention is by being respectively arranged in upper half arc-shaped cavity and in lower half arc-shaped cavity
Upper half elastic metallic covers and lower half elastic metallic set, and the elasticity gold to be formed is covered using upper half elastic metallic set and lower half elastic metallic
Belong to the interference fit between set and cable cable to be fixed, to prevent cable axial float in a mold
Under the premise of, it is ensured that cable outer layer protection rubber is not squeezed by die joint bad when upper and lower mould molds, and improves product quality.It will
Elastic metallic set is arranged to gear-like, can reduce the rigidity of elastic metallic set, improve the ability of Curvature varying.By to elasticity
Matching design between metallic sheath and cavity so that in mold process, vertically upper elastic metallic set always with upper half arc
Chamber and lower half arc-shaped cavity are in contact, and so that elastic metallic covers and upper half arc-shaped cavity and lower half arc in the horizontal direction before molding
There are gaps between chamber, and with the progress of molding, elastic metallic set expands outwardly, and the gap is progressively smaller until to be zero, from
And the excessive of rubber protective layer outside cable can be further avoided.Upper mold overall structure is changed to the knot of left and right two section
Structure, the cavity of filler and the cavity of fixed cable are disposed on left and right two half modules, since left and right half module is not done mutually
It relates to, in filler, upper right half module can tightly can be withheld on cable, by the pressure of spring together with lower die always
Fixed cable, is lifted in filler by sizing material without causing as monoblock type upper mold, the shape between lower die and cable
At gap so that the present invention can prevent cable from moving axially in molding, ensure that rubber sheath and metal terminal it
Between axial position reduce rejection rate to ensure that the quality of cable line end.
Description of the drawings
Fig. 1 is the structural schematic diagram at actuator cable line end；
Fig. 2 is the theory structure schematic diagram one when carrying out compression molding to actuator cable line end in the prior art；
Fig. 3 is the theory structure schematic diagram two when carrying out compression molding to actuator cable line end in the prior art；
Fig. 4 is the theory structure schematic diagram three when carrying out compression molding to actuator cable line end in the prior art；
Fig. 5 is in the prior art when carrying out compression molding, and upper mold, cable and lower die match the structural schematic diagram at place；
Fig. 6 is in the embodiment of the present invention when not carrying out compression molding, along cable diameter to and positioned at section view at upper die and lower die
Structural schematic diagram；
When Fig. 7 is compression molding in the embodiment of the present invention, along cable diameter to and sectional structure at the upper die and lower die show
It is intended to；
Fig. 8 is the radial section view knot that upper half elastic metallic set and lower half elastic metallic cover the rubber sleeve to be formed in the embodiment of the present invention
Structure schematic diagram；
Fig. 9 is that just contact forms elasticity to the embodiment of the present invention for upper half elastic metallic set and lower half elastic metallic set in mold process
When metallic sheath, the radial broken section structural schematic diagram at elastic metallic set；（Cable is not shown in figure）
Figure 10 is the theory structure schematic diagram one when the embodiment of the present invention carries out actuator cable line end compression molding；（In figure
It is not drawn into filler）
Figure 11 is the theory structure schematic diagram two when the embodiment of the present invention carries out actuator cable line end compression molding；（In figure
It is not drawn into filler）
Figure 12 is the theory structure schematic diagram three when the embodiment of the present invention carries out actuator cable line end compression molding；（In figure
It is not drawn into filler）
In figure：1. cable, 2. conducting wires, 3. metal terminals, 4. end rubber protecting jackets, 5. lower dies, 6. lower half portion
Sizing material, 7. die inserts, 8. upper molds, 811. upper left half modules, 812. upper right half modules, 9. top half sizing materials, 10. upper half
Arc-shaped cavity, 11. lower half arc-shaped cavities, 12. upper half elastic metallic sets, 13. lower half elastic metallic sets, 14. half arc ontologies,
15. notch, 16. cavitys, 17. elastic metallic sets, 18. upper impressions, 19. top boards, 20. springs, 21. lower impressions,
22. lower platen, 23. locating pieces one, 24. locating slots one.
Specific implementation mode
Further details of elaboration is done to technical scheme of the present invention in the following with reference to the drawings and specific embodiments.
Embodiment 1：It is as shown in Figure 6 and Figure 7, a kind of to prevent the mould pressing method that cable protection layer overflows when molding,
It is respectively to add an elasticity half in upper mold 8 and lower die 5 to cover, after upper die and lower die snap together, using in upper and lower mould
Elastic 1 peripheral part of cable that is partly sleeved on forms the structure that a resilient sleeve constitutes interference fit with cable 1, thus by cable
It fixes；When causing cable to apply load to 1 inner cavity of resilient sleeve because of interference fit, the Curvature varying of resilient sleeve 1 is utilized
Make resilient sleeve 1 carry out elastic dilatation outward, to increase the cavity volume of resilient sleeve 1 accommodates more cable outer layers
Rubber avoids cable protection layer spilling.
It is the elastic metallic set of gear-like that the resilient sleeve, which uses elastic metallic set, the elastic metallic set,.
After snapping together upper die and lower die, elastic metallic covers the rubber protection that cavity diameter is less than outside cable
The diameter of layer, to form the structure of interference fit.
As shown in Figure 6 and Figure 7, the present embodiment be also disclosed it is a kind of can prevent molding when cable rubber protective layer overflow mould
Press tooling, including upper mold 8 and lower die 5, the bottom of upper mold 8 be provided with to be formed rubber protecting jacket upper impression and with cable phase
Matched upper half arc-shaped cavity 10 is provided with to form the lower impressions of rubber protecting jacket and with cable match at the top of lower die 5
Lower half arc-shaped cavity 11, be provided in the upper half arc-shaped cavity 10 of upper mold 8 upper half elastic metallic set 12, in the lower half arc of lower die 5
Shape intracavitary 11 is provided with lower half elastic metallic set 13, when the top board of vulcanizer drives upper mold to be snapped together with lower die, passes through
The lower half elastic metallic set 13 in upper half elastic metallic set 12 and lower half arc-shaped cavity in upper half arc-shaped cavity matches compression cable
Line 1.In the present embodiment, upper half elastic metallic set 12 and lower half elastic metallic set 13 pass through connector respectively（Such as screw）Even
It is connected in upper half arc-shaped cavity and lower half arc-shaped cavity.Upper half elastic metallic set 12 and lower half elastic metallic set 13 length be placed on
Upper half arc-shaped cavity is identical with the cable line length in lower half arc-shaped cavity.Upper half elastic metallic set 12 and lower half elastic metallic set 13 are
Spring steel material can be used to be made.
In this way, during pressure, cause cable to upper half elastic metallic set and lower semi-elastic because of interference fit
When the elastic metallic set inner cavity that metallic sheath is formed applies radial load, elastic metallic set will carry out elastic dilatation outward, elasticity
Metallic sheath, which expands outwardly, will increase the volume of elastic metallic set inner cavity and accommodates the rubber protective layer outside more cables, from
And prevent the rubber protective layer outside cable from overflowing, and then avoid the rubber of spilling squeezed by upper and lower mould in molding it is bad, from
And improve the quality of product.In addition, the cavity volume of degree and elastic metallic that elastic metallic set expands outwardly set can be with
It cable linear diameter and increases interference volume and increase and automatically adjust, thus in the premise for preventing cable axial float in a mold
Under, it is ensured that cable outer layer protection rubber is not squeezed by die joint bad when upper and lower mould molds.
As shown in figure 8, upper half elastic metallic set 12 and lower half elastic metallic set 13 include half arc ontology 14, along half arc
The circumferential direction of shape ontology 14 is provided with multiple notch 15 on half arc ontology, 14 outer wall；When upper half elastic metallic set 12 and lower half bullet
Property metallic sheath 13 when being close together, the elastic metallic set that upper half elastic metallic set 12 and lower half elastic metallic set 13 are formed is tooth
Colyliform.Setting can reduce the rigidity of elastic metallic set in this way, improve the ability of Curvature varying.
In addition, compared with the elastic metallic set of other structures, gear-like elastic metallic set has its unique advantage, if
Using thick ring shape elastic metallic set, wall thickness is larger, and rigidity is preferable, but expanded outwardly under smaller radial pressure
Limitation, and cable material is softer rubber and filler, even if be relatively large in diameter in cable, with elastic metallic set
When internal diameter interference is larger, it is also difficult to so that elastic metallic is cased with larger expansion to increase cavity volume come cable when avoiding molding
Line outer layer rubber is squeezed bad by die joint.If using thin-wall construction annular shape elastic metallic cover if conversely, because the thin rigidity of wall compared with
Difference, under smaller radial pressure to extend out will open it is bigger, although avoiding cable from being squeezed bad work increasing cavity volume
It is fine with aspect effect but extremely limited to the radial package bracing force of cable after its expansion, it tends to be difficult to ensure electricity
Cable not play in the axial direction.And the gear-like elastic metallic set that the present embodiment uses avoids lacking for two kinds of front structure
Point, thicker wall thickness, circumferential sawtooth ensure that its wall thickness, rigidity and deformability are all moderate.
The notch 15 is triangle, and when elastic metallic set inner cavity is expanded outward by radial load, inside and outside wall is bent
Rate radius increases, and the width of triangular incision reduces.
After upper die and lower die snap together, the elasticity of 13 formation of upper half elastic metallic set 12 and lower half elastic metallic set
Metallic sheath cavity diameter is less than the diameter of the rubber protective layer outside cable, to form interference fit.
As shown in figure 9, when upper die and lower die snap together, the chamber of upper half arc-shaped cavity 10 and the formation of lower half arc-shaped cavity 11
Body 16 is ellipse, and the short axle Y of elliptical cavity is equal to the largest outer diameter D of gear-like elastic metallic set 17, the length of elliptical cavity 16
Axis X is more than the largest outer diameter D of gear-like elastic metallic set 17.Setting makes in mold process in this way, vertically upper elasticity
Metallic sheath is in contact with upper half arc-shaped cavity and lower half arc-shaped cavity always, and make before molding in the horizontal direction elastic metallic set with
There are gaps between upper half arc-shaped cavity and lower half arc-shaped cavity, and with the progress of molding, elastic metallic set expands outwardly, the gap
It is progressively smaller until to be zero, so as to further avoid the excessive of the rubber protective layer outside cable.
As shown in Figure 10, the upper mold 8 is divided into upper left half module 811 and upper right half module 812, and upper impression 18 is arranged on a left side
The bottom of upper mold section 811, upper half arc-shaped cavity（It is not shown in figure）It is arranged in the bottom of upper right half module 812, upper left half module 811 and sulphur
There are gaps between the top board 19 of change machine, and spring 20 is provided between upper right half module 812 and the top board 19 of vulcanizer；It utilizes
The upper impression 18 of upper left half module 811 and the lower impressions 21 of lower die 5 are matched and are molded to end rubber protecting jacket, utilize upper right
The upper half arc-shaped cavity of half module 812 and the lower half arc-shaped cavity of lower die 5 match and cable 1 are fixed.In the present embodiment, bullet
Spring is compression spring.
In the prior art, pressure of the sizing material in die cavity can make cable and metal terminal have axial movement when molding
Trend, since metal terminal is blocked by die insert, so that cable and metal terminal can not be moved towards die insert, and
It can move backward（It can be moved towards the dextrad in Fig. 4）, at this time only by between upper and lower mould and cable due to interference fit
The frictional force of generation prevents the cable and metal terminal from moving right, but in fact, prevents cable in this way
Line and metal terminal axial movement and non insurance, once so cable moves axially, rubber sheath and metal terminal it
Between axial position will change, so as to cause waste product.
But in the prior art using being interference fitted between upper and lower mould and cable and the frictional force that generates prevents electricity
Cable and metal terminal move right and non insurance, and applicant is by careful analysis and the study found that this is because in reality
The volume of filler is always more than mold cavity volume, and when filler, the shape of institute's filling chock material is also impossible to very regular, i.e. institute's filling chock material
Shape can not possibly be completely bonded with the shape after die cavity, cable wire stripping crimping metal terminal, therefore the volume shared by filler
It is greater than the actual volume of institute's filling chock material, therefore after upper and lower mould molding, the volume that filler occupies more can jack up upper mold, lead
Causing the theoretical binding face of upper and lower mould is not merged at one piece at the beginning of molding, has certain interval, only as vulcanizer is flat
After plate is continuously applied to mold clamping force, this gap just can constantly reduce, until upper and lower mould is bonded completely, in this process, not advise
Filler then can continuous Deformation Flow under stress, until filling up die cavity.Although the cavity after cable and the molding of upper and lower mould is set
Interference fit is counted, but after being jacked up by sizing material due to upper mold, upper mold can not push down cable in clamping process, so this interference
Cooperation has not yet been formed in upper and lower mould clamping process, thus can not play fixed cable completely, to cause cable and
Metal terminal play to the right in clamping process.Upper mold overall structure is changed to the structure of left and right two section by the present embodiment, filler
The cavity of cavity and fixed cable is disposed on left and right two half modules, since left and right half module is non-interference, in filler
When, upper right half module can tightly can be withheld on cable by the pressure of spring always, and cable is fixed together with lower die
Line is lifted by sizing material in filler as monoblock type upper mold without causing, forms gap between lower die and cable, from
And the present embodiment is enable to prevent cable from moving axially in molding, it ensure that the axial direction between rubber sheath and metal terminal
Position reduces rejection rate to ensure that the quality of cable line end.
In upper left, the bottom of half module 811 is provided with the upper impression 18 to form rubber protecting jacket, positioned at upper left half module side
The top of lower die 5 on be provided with the lower impressions 21 to form rubber protecting jacket, match and to be formed by upper impression 18 and lower impressions 21
The cavity of rubber protecting jacket is provided with and 1 matched upper half arc-shaped cavity of cable in the bottom of upper right half module 812（In figure not
It shows）, it is provided with and 1 matched lower half arc-shaped cavity of cable on 5 top of lower die positioned at upper right half module side（In figure not
It shows）, when the top board 19 of vulcanizer drives upper mold 8 to be snapped together with lower die 5, pass through upper half arc-shaped cavity and lower half arc-shaped cavity
It matches and compresses cable 1.The present embodiment is molded by the lower impressions of the upper impression of upper left half module and lower die, passes through upper right half
The cavity that the upper half arc-shaped cavity of mould and the lower half arc-shaped cavity of lower die are formed fixes cable with cable by being interference fitted
Line has further prevented cable when molding to move axially in this way.
As shown in Figure 10 to Figure 12, filler and upper die and lower die are snapped together into the cavity for forming rubber protecting jacket
Afterwards, the distance between top board 19 of upper right half module 812 and vulcanizer L1 is more than the top board 19 of upper left half module 811 and vulcanizer
The distance between L2.Setting makes the present embodiment when carrying out molding vulcanization in this way, during top board 19 moves down, upper pressure
Plate 19 is first contacted with upper left half module 811, then is contacted with upper right half module 812, up to top board is by upper left half module 811, upper right half module
812 compress and are fastened in lower die 5, and in the process, spring always applies downward pressure to upper right half module 812 and applied
Pressure is increasing, to further avoid the axial movement of cable and metal terminal.
As shown in Figure 10, lower die 5 is placed on the lower platen 22 of vulcanizer, the bottom of half module 811 and upper right half in upper left
The bottom of mould 812 is also respectively provided with the locating piece 1 and locating piece two of protrusion（It is not shown in figure）, on 5 top of lower die also
Be provided with respectively with the locating piece 1 and the matched locating slot 1 of locating piece two-phase and locating slot two（It is not shown in figure）.
It can guarantee positioning accuracy when upper and lower die button is combined in this way.
To sum up, the present invention by upper half arc-shaped cavity and lower half arc-shaped cavity in be respectively arranged with upper half elastic metallic set and
Lower half elastic metallic set is covered using upper half elastic metallic set and lower half elastic metallic between the elastic metallic to be formed set and cable
Interference fit cable is fixed, to prevent cable axial float in a mold under the premise of, it is ensured that electricity
Cable outer layer protection rubber is not squeezed by die joint bad when upper and lower mould molds, and improves product quality.Elastic metallic is covered and is arranged
At gear-like, the rigidity of elastic metallic set can be reduced, the ability of Curvature varying is improved.By to elastic metallic set and cavity it
Between matching design so that in mold process, vertically upper elastic metallic set always with upper half arc-shaped cavity and lower half arc-shaped cavity
Be in contact, and make before molding in the horizontal direction elastic metallic set upper half arc-shaped cavity and lower half arc-shaped cavity between there are
Gap, with the progress of molding, elastic metallic set expands outwardly, and the gap is progressively smaller until to be zero, so as to further keep away
The excessive of the rubber protective layer outside cable is exempted from.Upper mold overall structure is changed to the structure of left and right two section, the cavity of filler
It is disposed on left and right two half modules with the cavity of fixed cable, it is right in filler since left and right half module is non-interference
Upper mold section can tightly can be withheld on cable by the pressure of spring always, and cable is fixed together with lower die, without
It can cause to be lifted by sizing material in filler as monoblock type upper mold, form gap between lower die and cable, so that
The present invention can prevent cable from moving axially in molding, ensure that the axial position between rubber sheath and metal terminal, from
And ensure that the quality of cable line end, reduce rejection rate.
" multiple " described in the present embodiment refer to the quantity of " two or more ".Above example is only for illustrating this
Invention is used rather than limitation of the present invention, and person skilled in the relevant technique is not departing from the spirit and scope of the present invention
In the case of, it can also make a variety of changes or convert, therefore all equivalent technical solutions should also belong to the guarantor of the present invention
Range is protected, protection scope of the present invention should be limited by each claim.
Claims (10)
1. a kind of can prevent the mould pressing method that cable protection layer overflows when molding, it is characterised in that：It is each in upper and lower mould
It adds an elasticity half to cover, after upper and lower die button is combined, cable peripheral part is partly sleeved on using the elasticity in upper and lower mould
The structure that a resilient sleeve constitutes interference fit with cable is formed, to fix cable；It is led when because of interference fit
When sending a telegraph cable to resilient sleeve inner cavity application load, using the Curvature varying of resilient sleeve come so that resilient sleeve carries out elastic expansion outward
, it accommodates more cable outer layer rubbers to increase the cavity volume of resilient sleeve, avoids cable protection layer spilling.
2. the mould pressing method that cable protection layer overflows when molding can be prevented with described in claim 1, it is characterised in that：It is described
It is the rubber sleeve of gear-like that resilient sleeve, which uses elastic metallic set, the elastic metallic set,.
3. with the mould pressing method that cable protection layer overflows when molding can be prevented described in claim 2, it is characterised in that：When upper
After mould and lower die snap together, elastic metallic covers the diameter for the rubber protective layer that cavity diameter is less than outside cable, to
Form the structure of interference fit.
4. a kind of can prevent the molding tooling that cable rubber protective layer overflows when molding, including upper die and lower die, in upper mold
The upper half arc-shaped cavity that bottom is provided with the upper impression to form rubber protecting jacket and matches with cable is arranged at the top of lower die
There is the lower half arc-shaped cavity to form the lower impressions of rubber protecting jacket and match with cable, it is characterised in that：In the upper half of upper mold
It is provided with upper half elastic metallic set in arc-shaped cavity, lower half elastic metallic set, vulcanizer are provided in the lower half arc-shaped cavity of lower die
Top board when upper mold and lower die being driven to snap together, pass through upper half elastic metallic set and the lower half arc in upper half arc-shaped cavity
Lower half elastic metallic set in chamber matches compression cable.
5. according to claim 4 can prevent the molding tooling that cable rubber protective layer overflows when molding, feature from existing
In：Upper half elastic metallic covers and lower half elastic metallic set includes half arc ontology, along the circumferential direction of half arc ontology, in half arc
Multiple notch are provided on body outer wall；When upper half elastic metallic set and lower half elastic metallic set are close together, upper semi-elastic
Metallic sheath and lower half elastic metallic cover the gear-like elastic metallic set to be formed.
6. according to claim 5 can prevent the molding tooling that cable rubber protective layer overflows when molding, feature from existing
In：The notch is triangle.
7. according to claim 5 or 6 can prevent the molding tooling that cable rubber protective layer overflows when molding, feature
It is：When upper die and lower die snap together, the cavity that upper half arc-shaped cavity and lower half arc-shaped cavity are formed is ellipse, oval cavity
Short axle be equal to the largest outer diameter of gear-like elastic metallic set, the long axis of oval cavity is more than gear-like elastic metallic set
Largest outer diameter.
8. according to claim 7 can prevent the molding tooling that cable rubber protective layer overflows when molding, feature from existing
In：The upper mold is divided into upper left half module and upper right half module, and upper impression is arranged in the bottom of upper left half module, and upper half arc-shaped cavity is set
Set between the bottom of upper right half module, upper left half module and the top board of vulcanizer there are gap, upper right half module and vulcanizer it is upper
Spring is provided between pressing plate；It is matched using upper left half module and lower die and end rubber protecting jacket is molded, utilize upper right
Half module and lower die, which match, is fixed cable.
9. according to claim 8 can prevent the molding tooling that cable rubber protective layer overflows when molding, feature from existing
In：After upper die and lower die are snapped together, the distance between top board of upper right half module and vulcanizer be more than upper left half module and
The distance between top board of vulcanizer.
10. according to claim 9 can prevent the molding tooling that cable rubber protective layer overflows when molding, feature from existing
In：In upper left, the bottom of half module and the bottom of upper right half module are also respectively provided with the locating piece one and locating piece two of protrusion, under
Be additionally provided at the top of mould respectively with the locating piece one and the matched locating slot one of locating piece two-phase and locating slot two.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810620017.5A CN108638412B (en) | 2018-06-15 | 2018-06-15 | Mould pressing method and mould pressing tool capable of preventing overflow of cable protection layer during mould pressing |
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|---|---|---|---|
| CN201810620017.5A CN108638412B (en) | 2018-06-15 | 2018-06-15 | Mould pressing method and mould pressing tool capable of preventing overflow of cable protection layer during mould pressing |
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| CN108638412B CN108638412B (en) | 2024-03-08 |
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| GB813699A (en) * | 1956-03-15 | 1959-05-21 | British Insulated Callenders | Improvements in or relating to apparatus for the vulcanisation of rubber covered wire and cable |
| US4405083A (en) * | 1982-03-19 | 1983-09-20 | Northern Telecom Limited | Moulding apparatus for encapsulating cable splices |
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|---|---|
| CN108638412B (en) | 2024-03-08 |
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