CN103112121B - Insert molding body - Google Patents
Insert molding body Download PDFInfo
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- CN103112121B CN103112121B CN201210458375.3A CN201210458375A CN103112121B CN 103112121 B CN103112121 B CN 103112121B CN 201210458375 A CN201210458375 A CN 201210458375A CN 103112121 B CN103112121 B CN 103112121B
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Abstract
Even if the present invention provides in the case of being formed with frangible portion in the resin component element constituting insert molding body, it is also possible to eliminate and there is produce in the environment of variations in temperature, the crack problem of resin component element because insert molding body is exposed to.Insert molding body includes resin component element and embeds component, and this resin component element has the frangible portion that local mechanical intensity is more weak, wherein, is formed about stress concentration portion in above-mentioned frangible portion.Preference as the stress concentration portion formed, it is possible to list thinner wall section.It addition, as the concrete example of frangible portion, it is possible to list weld part, melt-coating part.
Description
Technical field
The present invention relates to a kind of insert molding body.
Background technology
Insert molding method is to play the characteristic of resin and metal, inoganic solids etc. (the most sometimes by metal, inorganic solid
Bodies etc. referred to as embed component) raw-material characteristic and by resin component element with embed component synthesis forming process.By this forming process
The insert molding body obtained is used as automobile component, electric, electronic unit, OA part of appliance etc..
But, for insert molding body, the temperature during the crackle of the resin component element produced after just shaping, use becomes
The crackle changing the resin component element caused becomes problem sometimes.These problems result from the expansion rate of resin, shrinkage factor with embedding
Enter the expansion rate of component, shrinkage factor difference.
As the method for the crack problem for solving above-mentioned resin component element, exist and will be made up of specific resin combination
Resin component element be formed at the method embedded on component.As being not likely to produce the resin combination of above-mentioned crack problem, such as public
Open and specific resistance to impact imparting agent, inorganic filler and aromatic ester compound have been mixed in polybutylene terephthalate tree
The resin combination (with reference to patent documentation 1) of fat.
But, if being formed with frangible portion in resin component element, then the problem being susceptible to above-mentioned resin component element cracking.?
This, so-called frangible portion refers to the part that weld part equal strength is more weak.As long as although can manufacture in the way of being formed without frangible portion
Insert molding body, but the frangible portion such as weld part the most also cannot be avoided to be formed at resin component element.
Patent documentation 1: Japanese Unexamined Patent Publication 2008-6829 publication
According to the method described in patent documentation 1, the problem being difficult in insert molding body resin component element cracking.But
It is, it is contemplated that when being formed with frangible portion in resin component element, even with the resin combination described in patent documentation 1, it is possible to
The crack problem of resin component element can be produced.
Summary of the invention
The present invention completes to solve above-mentioned problem, its object is to provide a kind of technology, though embedding constituting
Entering in the resin component element of formed body and be formed with frangible portion, this technology also is able to solve insert molding body and there is temperature change because being exposed to
The crack problem of the resin component element produced in the environment changed.
Present inventor has been repeated further investigation to solve above problem.Its result is to find, is including having office
In the resin component element of the frangible portion that portion's mechanical strength is more weak and the insert molding body of embedding component, it is possible to by above-mentioned crisp
Weak portion is formed about stress concentration portion to solve above-mentioned problem, completes the present invention.More particularly, the present invention provides techniques below
Scheme.
(1) insert molding body includes resin component element and embeds component, and above-mentioned resin component element includes local mechanical intensity relatively
Weak frangible portion and be formed at the stress concentration portion of vicinity of above-mentioned frangible portion.
(2) according to the insert molding body described in (1), above-mentioned stress concentration portion is that local thickness's ratio of above-mentioned resin component element is upper
State the thinner wall section that the local thickness of above-mentioned resin component element in frangible portion is thin.
(3) according to the insert molding body described in (1) or (2), above-mentioned stress concentration portion is in the way of surrounding above-mentioned frangible portion
Formed multiple.
(4) according to the insert molding body according to any one of (1)～(3), above-mentioned frangible portion is present in apart from above-mentioned resin
The position that the surface of component is deeper, above-mentioned stress concentration portion is formed at the recess on above-mentioned surface, and the bottom of above-mentioned recess exists
In the position deeper than the above-mentioned position existing for above-mentioned frangible portion.
(5) according to the insert molding body according to any one of (1)～(4), above-mentioned frangible portion is weld part or melt-coating part.
According to the present invention, even if in the case of being formed with frangible portion in the resin component element constituting insert molding body, also can
The crack problem of the resin component element produced in the environment of variations in temperature is there is in enough suppression because insert molding body is exposed to.
Accompanying drawing explanation
Fig. 1 is the axonometric chart of the insert molding body schematically showing the first embodiment.
Fig. 2 is the front view of the insert molding body schematically showing the first embodiment.
(a) of Fig. 3 is the schematic diagram in the MM cross section of Fig. 1.In the case of (b) of Fig. 3 is formed without stress concentration portion 102
The schematic diagram in MM cross section.
Fig. 4 is the figure of the insert molding body schematically showing the second embodiment.
Fig. 5 is the figure of the insert molding body schematically showing embodiment 1, and (a) of Fig. 5 is axonometric chart, and (b) of Fig. 5 is
Sectional view after cutting open along OO.
Fig. 6 is the axonometric chart of the insert molding body schematically showing embodiment 2.
Fig. 7 is the respective top view of the insert molding body of the six kinds of hardwares using embodiment 2.
Detailed description of the invention
Hereinafter, embodiments of the present invention are illustrated.It addition, the present invention is not limited to implementation below.
First embodiment
Utilize Fig. 1 that the insert molding body of the present invention is illustrated.Insert molding body 1 includes resin component element 10 and embeds structure
Part 11.Insert molding body 1 refers to the component that resin component element 10 and embedding component 11 form as one and obtain, no matter with which kind of side
Formula is embedding formation resin component element 10 on component 11.If being formed with resin component element 10, then resin structure embedding on component 11
Part 10 and embedding component 11 are bonded together with predetermined closing force.If resin component element 10 and embedding component 11 engage in this way
Together, then in the case of insert molding body 1 is exposed to and exists in the environment of variations in temperature, may be because embedding the expansion of component
Contractive action is different from the dilation action of resin component element and causes the crackle of resin component element 1.If as it has been described above, resin component element
10 are bonded together with embedding component 11, then can produce above-mentioned crack problem, become the application of the present invention.It addition, such as Fig. 1
Shown in, in the present embodiment, form as one in the way of covering around columned embedding component 11 by resin component element 10
Insert molding body 1 illustrate as an example.
Resin component element 10 is made up of thermoplastic resin composition.Thermoplastic resin composition is to comprise thermoplastic resin conduct
The resin combination of required composition.Spendable thermoplastic resin lipid species is not particularly limited, it is possible to use existing known kind
Class.For instance, it is possible to list polyacetal-based resins, polyester resin, poly arylidene thio-ester resinoid, liquid-crystalline resin, olefines tree
Fat etc..Alternatively, it is also possible to use multiple thermoplastic resin.Particularly polybutylene terephthalate, polyphenylene sulfide etc. are being used
In the case of making thermoplastic resin, easily produce above-mentioned crack problem.But, according to the present invention, even if using such resin,
It also is able to suppress above-mentioned crack problem.
And, in thermoplastic resin composition, in addition to containing the thermoplastic resin as required composition, additionally it is possible to
Containing common additives such as the hardening agents such as inorganic filler, antioxidant, stabilizer, pigment, nucleators.Such as, if glass
The compositions such as fiber, calcium carbonate, Talcum are contained in resin component element 10, then easily produce above-mentioned crack problem.But, according to this
Bright, even if these compositions are contained in resin component element 10, it is also possible to suppress above-mentioned crack problem.
Owing to resin component element 10 engages with embedding component 11 in the above described manner, therefore, the shape of resin component element 10 is not
Be particularly limited to, the resin component element 10 in present embodiment be shaped as tubular.Resin component element 10 is in the internal face of tubular and embedding
Component 11 engages.
Resin component element 10 includes the more weak frangible portion 101 of local mechanical intensity and is formed at the stress near above-mentioned frangible portion
In the middle part of collection 102.
Frangible portion 101 refers to the part that mechanical strength is more weak in resin component element 10.So-called mechanical strength is more weak refer to
Other parts are compared, the part cracked because of less stress.For instance, it is possible to exemplify weld part, melt-coating part, stress collection
Middle part, gate part etc..These parts are the parts that the intensity of material self is relatively low compared with other parts of resin component element 10, energy
Enough it is confirmed whether to there is this type of frangible portion by the method for flow analysis, cross-section.It addition, in the present embodiment, welding
Portion's (representing in dash-dot line in Fig. 1) is frangible portion 101.
As described later, owing to playing the effect of the present invention by being formed about stress concentration portion 102 in frangible portion 101,
Therefore, the shape of frangible portion, size, kind etc. without particular limitation of.
It addition, resin component element 10 can also have multiple frangible portion 101, multiple frangible portion both can be the crisp of identical type
Weak portion, it is also possible to be different types of frangible portion.
Stress concentration portion 102 refers to result from the stress of the inside of resin component element 10, put on resin component element 10 from outside
The part easily concentrated in resin component element 10 of stress.For instance, it is possible to list the thickness of resin component element than neighbouring fragility
Thinner wall section that the thickness in portion is thin, corner etc..Thinner wall section not only includes the recess being intentionally formed as notch etc., also
The part unconsciously formed including defective part etc..The shape of otch also without particular limitation of.
Stress concentration portion 102 in present embodiment by clamping frangible portion 101 that is weld part in the way of and frangible portion
101 there are at two substantially in parallel.And, in the case of observing insert molding body from front, the two of stress concentration portion 102
The position of end is substantially uniform with the position at the two ends of frangible portion.
As described later, in the present invention, the present invention is played by being formed about stress concentration portion 102 in frangible portion 101
Effect.Therefore, frangible portion 101 is a feature of the present invention with the relation of stress concentration portion 102.Hereinafter, to frangible portion 101
Illustrate with the relation of stress concentration portion 102.
Stress concentration portion 102 is formed near frangible portion 101.Owing to excessively dividing with stress concentration portion 102 when frangible portion 101
From time will not play the effect of the present invention, accordingly, it would be desirable to be formed about stress concentration portion 102 in frangible portion 101.
So-called " near " refer to the situation close together between frangible portion 101 and stress concentration portion 102.Here, it is so-called
" distance between frangible portion 101 and stress concentration portion 102 " refers to that each point from frangible portion 101 is respectively to stress concentration portion
The minimum range of 102.Needing the reason so considering each point of frangible portion 101 to be, the crackle of resin component element 10 is with point
Produce for starting point.
Being equivalent to of frangible portion 101 and stress concentration portion 102 " near " separation degree according to thermoplastic resin lipid species, crisp
Weak portion kind etc. and the most different.It addition, the purposes according to insert molding body 1 is the most different.Its reason
Being, if purposes is different, then the stress resulting from resin component element 10 is the most different.More particularly, its reason is, if produce
Stress is different, then put on and exceed allowable stress (maximum stress that frangible portion 101 will not ftracture) in the stress of frangible portion 101
Amount different, accordingly, it would be desirable to the most different by forming the size of the stress that stress concentration portion carries out relaxing.So, so-called " attached
Closely " though according to purposes, thermoplastic resin of being used etc. and the most different, but do as follows, it is possible to determine
The position of stress concentration portion 102.
The purpose being formed about stress concentration portion 102 in frangible portion 101 is, should when producing in the inside of resin component element 10
During power, when applying stress externally to resin component element 10, by make stress concentrate on stress concentration portion 102 reduce put on crisp
The stress in weak portion 101, thus prevent the crackle of frangible portion 101.Thus, it is possible to reduce put on frangible portion 101 stress away from
From being equivalent to " near ".
So-called " can reduce the distance of the stress putting on frangible portion " can try to achieve according to such as following sequence.First,
Utilize existing known common software etc. derive in the insert molding body 1 being formed without stress concentration portion 102, result from fragility
The stress in portion 101.It addition, utilize existing known common software etc., the maximum that derivation frangible portion 101 will not ftracture the most in the lump should
Power (is referred to as allowable stress) in this manual.Here, result from the stress of frangible portion 101, allowable stress according to specific bar
Part (determining the condition of the purposes etc. of specific thermoplastic resin lipid species, insert molding body) and derive.That is, specified right
Under the state of the most parameters that the suitable position of stress concentration portion 102 produces considerable influence, derive above-mentioned stress.
Then, derive in the same way be formed in the insert molding body 1 of stress concentration portion 102 result from frangible portion
The stress of 101.Make frangible portion 101 and stress concentration portion 102 close to being below allowable stress to the stress resulting from frangible portion 101
Till.I.e., it is possible to make the position of the stress concentration portion that the stress resulting from frangible portion 101 is in below allowable stress be equivalent to
Near " ".
Shape, size about stress concentration portion, it is also desirable to as meet above-mentioned " near " according to thermoplastic resin
Kind, purposes take the circumstances into consideration to set.That is, according to the difference of the method forming stress concentration portion 102, stress concentration portion 102 is near fragile
Portion 101 or away from frangible portion 101.Therefore, the method forming stress concentration portion 102 produces shadow to the crackle of resin component element 10
Ring, it is therefore preferred to, the viewpoint that the shape of stress concentration portion 102 will not ftracture also based on resin component element 10 determines.Below
The method of the shape of 102 in the middle part of identified sign collection is illustrated.It addition, in the following description, make for convenience of explanation and only
Illustrate with the side of columned insert molding body 1.
Fig. 2 is the schematic diagram of the front view of insert molding body 1.In (a) of Fig. 2 and (b) of Fig. 2, stress concentration portion 102
, length on the direction that stress concentration portion 102 extends different.
One end of weld part in the front view of insert molding body 1 is set to α, the other end is set to β.If (a) such as Fig. 2
The shown stress concentration portion 102 that formed, then compared with the situation forming stress concentration portion 102 as shown in (b) of Fig. 2, from
The assigned position of frangible portion 101 diminishes to the maximum of the distance of stress concentration portion 102.As shown in (a) of Fig. 2, by with crisp
Optional position in weak portion 101 all becomes the mode near stress concentration portion 102 and forms stress concentration portion 102, the most easily sends out
Wave the effect of the present invention.
As it has been described above, the viewpoint of crackle based on suppression frangible portion comes the position in the middle part of identified sign collection, shape.In fragility
In the case of portion is point, only consider the position of stress concentration portion, but, in the case of frangible portion is made up of line, face, need
To be formed about stress concentration portion by each point in frangible portion.Therefore, in the case of frangible portion is made up of line, face, it is also desirable to
Consider that the shape of frangible portion forms stress concentration portion to prevent the crackle of frangible portion.Specifically, as it is shown in figure 1, in wire
Frangible portion 101 in the case of, preferably to form stress concentration portion across this line and in the way of this line.In frangible portion by face
In the case of composition, in the way of the periphery of enveloping surface, preferably form stress concentration portion.This is because, if do so, it is possible to
Suppression cracks at resin component element by making the local of frangible portion leave stress concentration portion.
Then, the relation between intensity and the intensity of stress concentration portion of frangible portion is illustrated.At insert molding body
It is exposed in the case of existing in the environment of variations in temperature, frangible portion, stress concentration portion are the part easily cracked.
Its reason is, the intensity of the material of frangible portion self is relatively low, and stress concentration portion is easily applied in stress compared with other parts
Thus be easily damaged.But, in most cases, in the middle part of frangible portion specific stress collection, it being more prone to crackle, the present invention is in frangible portion
It is effective in the case of easily cracking in the middle part of specific stress collection.What is called " easily cracks in the middle part of frangible portion specific stress collection
Situation " can try to achieve by utilizing existing known software analysis allowable stress.
Embed component 11 at least one of surface can use all the time in insert molding body use common
Material.That is, the material constituting embedding component 11 can be any one in metal, inorganic material, organic material.Specifically,
The metals such as tapping, cast iron, rustless steel, aluminum, copper, gold, silver, pyrite can be enumerated, there are the pottery of heat conductivity, material with carbon element etc..Separately
Outward, the metal etc. being formed with metallic film on surface is also used as embedding component 11.As metallic film, it is possible to exemplify example
Such as the thin film formed by electroplating processes (wet type electroplating processes, dry type electroplating processes etc.).It addition, embed component 11 except referring to
Outside the monomer of metal, inorganic material etc., sometimes referred to as include the complex of various metals, resin etc..
The material constituting embedding component 11 is considered that such as purposes, constitutes the thermal expansion of the resin material of resin component element
The physical propertys such as rate and take the circumstances into consideration to select preferred material.
For manufacture embed component 11 forming process without particular limitation of, but, in the case of e.g. metal, it is possible to profit
With sides such as the die castings such as processing, die casting, injection mo(u)lding, pressure stamping-out such as the machining carried out based on existing known lathe
Method carrys out the embedding component of manufacturing objective shape.
The manufacture method of insert molding body 1 without particular limitation of, common method can be used.For instance, it is possible to list by
Embed component to be configured in mould, make the thermoplastic resin composition of molten condition flow in mould.
Utilize Fig. 3 that the effect of the present invention is illustrated.(a) of Fig. 3 is the signal in the cross section after cutting open along the MM of Fig. 1
Figure.(b) of Fig. 3 is the schematic diagram in the cross section after being formed without cutting open along MM in the case of stress concentration portion 102.Point X is fragile
Portion 101, and extend along the direction running through paper.
As it is shown on figure 3, the situation that the direction along hollow arrow indication applies stress illustrates.The length of hollow arrow
Represent the size of stress.In the case of not forming the stress concentration portion 102 of the thinner thickness of resin component element compared with frangible portion,
As shown in (b) of Fig. 3, frangible portion 101 is applied bigger stress.In contrast, in the situation being formed with stress concentration portion 102
Under, a part for the stress putting on frangible portion 101 puts on stress concentration portion 102.As a result of which it is, put on frangible portion 101
Stress diminish.If the stress putting on frangible portion 101 diminishes, then can suppress or postpone splitting that frangible portion 101 produces
Stricture of vagina.
In the present embodiment, as in figure 2 it is shown, be formed with multiple stress concentration portion 102 in resin component element 10.If stress
In the middle part of collection, 102 are present in the direction that stress is applied, then stress concentration portion 102 can eliminate put on frangible portion 101 along executing
Add a part for stress on the direction of stress.Thus, if being formed with multiple stress concentration portion 102, then enough minimizings are from more
The stress in direction.As a result of which it is, owing to can suppress to put on the stress of frangible portion further, therefore, it is possible to suppress further
The crackle of frangible portion.Such as, in the present embodiment, due to be formed with stress concentration portion in the way of frangible portion 101
102, therefore, it is possible to reduce the stress from left and right both direction.
In the present embodiment, stress concentration portion 102, to be formed in the way of the frangible portion 10 of wire, becomes in fragility
The state that any point in portion 101 is all clamped by stress concentration portion 102.Accordingly, because line segment arbitrary constituting frangible portion 101
All there is stress concentration portion 102 in position, therefore, the stress of any position putting on frangible portion 101 is all alleviated.
Second embodiment
With reference to Fig. 4, the second embodiment of the insert molding body of the present invention is illustrated.Fig. 4 is to schematically show
The figure of the insert molding body 1A of two embodiments, (a) of Fig. 4 is axonometric chart, and (b) of Fig. 4 is the sectional view after cutting open along NN, figure
(c) of 4 is the partial enlarged drawing of Fig. 4 (b).It addition, in explanation after the second embodiment, to identical structural element
Mark identical reference, its explanation is omitted or simplified.
Being with the difference of the first embodiment, the insert molding body 1A of present embodiment is configured to stress and easily collects
In in frangible portion 101A, frangible portion 101A be melt-coating part.
As shown in Figure 4, the insert molding body 1A of present embodiment includes the resin component element 10A of box like and is arranged in case
The embedding component 11A of the inside of the resin component element 10A of shape.
The resin component element 10A of present embodiment is made up of cap and housing section.Upper surface in housing section there are opening,
It is formed with step-like stage portion at the edge of this opening.Resin component element 10A is by by outside the back side of this stage portion and cap
Week deposition and formed.The melt-coating part formed in this way is corresponding to frangible portion 101A of present embodiment.And, in the side of cap
Gap 103A is formed between surface and stage portion.The degree of depth of the upper surface of gap 103A distance housing section is d.
And, the upper surface in housing section is formed with multiple recess in the way of surrounding above-mentioned opening.The plurality of recess is
Stress concentration portion 102A.The degree of depth of the upper surface of stress concentration portion 102A distance housing section is D, the size of degree of depth D and degree of depth d
Size is the most consistent or is more than degree of depth d.
The manufacture method of the insert molding body of present embodiment without particular limitation of, such as, embedding component 11A is configured at mould
In tool, the thermoplastic resin composition of molten condition is expelled in mould, manufactures and embed component 11A and resin component element 10A's
The one compound of housing parts, then, utilizes existing known deposition method such as vibration deposition method, ultrasonic wave coating method etc. to by note
Cap and the above-mentioned one compound of penetrating the resin component element 10A of the manufactures such as forming process carry out deposition.
Insert molding body 1A according to the second embodiment, except playing the insert molding body 1 of above-mentioned first embodiment
Effect outside, also play following effect.
In the present embodiment, stress easily concentrates on frangible portion 101A.In this case, by frangible portion
Stress concentration portion 102A is set near 101A, it is also possible to suppress to put in the case of the inside of insert molding body produces stress
The stress of frangible portion 101A.
Particularly, by making degree of depth D of the stress concentration portion 102A degree of depth than gap 103A deep, or stress concentration portion is made
Degree of depth D of 102A is unanimous on the whole with the degree of depth of gap 103A such that it is able to will put on a part for the stress of frangible portion 101A
Put on stress concentration portion.As a result of which it is, the stress putting on frangible portion 101A diminishes, frangible portion 101A is difficult to crack.
Embodiment
Embodiment 1
To using polyphenyl thioether resin composition in the formation of resin component element, (Bao Li plastics society system, " FORTRON(registers
Trade mark) 1140A6 "), use ferrum to carry out as the insert molding body embedded in the case of component with Imitating.Each material main
Physical property is as follows.
(polyphenylene sulfide)
Bend elastic constant: 10,010MPa
Poisson's ratio: 0.40
Linear expansion coefficient: 3.0 × 10-5(1/ DEG C)
(ferrum)
Bend elastic constant: 206,000MPa
Poisson's ratio: 0.29
Linear expansion coefficient: 1.17 × 10-5(1/ DEG C)
In the simulation of embodiment 1, the insert molding body shown in imaginary drawing 5.Fig. 5 is to be shown schematically in embodiment 1
In imaginary insert molding body, (a) of Fig. 5 is axonometric chart, and (b) of Fig. 5 is the sectional view after cutting open along OO.As it is shown in figure 5, it is real
Execute imaginary insert molding body in example 1 and there are rectangular-shaped embedding component in the inside of the resin component element of box like.
Upper surface at resin component element is formed with opening and circular slit.Above-mentioned opening runs through the upper table of resin component element
Face.It addition, opening becomes cone-shaped from midway, when the direction section view shown in (b) from Fig. 5 is observed, opening formed more towards
The inside of insert molding body and the thinnest shape in front end.Columned lid is set in the way of closing this opening.This lid is also set to
It is made up of above-mentioned polyphenylene sulfide.As it is shown in figure 5, lid becomes cone-shaped from way, and it is set to the cone-shaped constituting lid
The inclined plane of the part of the inclined plane of part and the cone-shaped of composition opening carries out ultrasonic wave coating.By this ultrasonic wave coating
The melt-coating part formed is equivalent to the frangible portion in the insert molding body of embodiment 1.It addition, lid and the upper surface of resin component element it
Between be formed with the upper surface from resin component element and extend to melt-coating part, circular gap.The bottom in this gap is also that stress holds
The part easily concentrated.That is, in the insert molding body of embodiment 1, stress easily concentrates on frangible portion.Above-mentioned gap is extended
The degree of depth in the gap on direction is 1.5mm.
The direction that above-mentioned circular slit is extended with above-mentioned circular gap extends substantially in parallel.In embodiment
In 1, insert molding body as 1.5mm of insert molding body with degree of depth D1 of slit as 1mm, degree of depth D1 of slit, slit deep
Degree D1 is insert molding body (being formed without the situation of the slit) these four that degree of depth D1 is 0mm of the insert molding body of 2mm, slit
Situation is simulated.Here, so-called simulation refers to analysis of Resin Flow (cae analysis).It addition, simulated conditions are at 23 DEG C
～intensification (programming rate 30 DEG C/minute), cooling (cooling rate 30 DEG C/minute) in the range of-40 DEG C, are repeated.
Specifically, by simulation derive as the melt-coating part of frangible portion, stress concentration portion any point (without narrow
The insert molding body of seam be any point of part in addition to melt-coating part) stress of upper generation.Table 1 illustrates derivation result.
The stress resulting from melt-coating part shown in table 1 is the stress producing the most heavily stressed generation in deposition face.
[table 1]
As shown in table 1, confirm and reduce applying by being formed about stress concentration portion in frangible portion that is melt-coating part
Stress in frangible portion.
It addition, the degree of depth confirming stress concentration portion that is slit from table 1 is closed with the stress existence produced in frangible portion
System.More particularly, if confirming the depth ratio of slit as frangible portion and is that the degree of depth of the position that stress is easily concentrated is deep,
Then can significantly reduce the stress produced in frangible portion.
Embodiment 2
Resin component element in the insert molding body of embodiment 2 by with the resin component element in the insert molding body of embodiment 1
Identical material is constituted, and the hardware in the insert molding body of embodiment 2 by with the gold in the insert molding body of embodiment 1
The material that metal elements is identical is simulated in the case of constituting.
Fig. 6 is the axonometric chart of the insert molding body schematically showing embodiment 2.As shown in Figure 6, the embedding of embodiment 2
Hardware in formed body be cross section be the cylindric of the tear type that comes to a point of front end, resin component element is to surround this columned gold
The mode of the side surface of metal elements is formed.
The weld part (scope surrounded by chain-dotted line in Fig. 6) being internally formed planar at resin component element.In embodiment 2
Insert molding body in, weld part is equivalent to frangible portion.
In example 2, six kinds of hardwares are used to carry out the insert molding body using each hardware with Imitating.
It addition, any one hardware is all the cylindric of generally tear type in cross section.(a) of Fig. 7～(f) of Fig. 7 are shown respectively
Use the respective top view of insert molding body of six kinds of hardwares.Hardware shown in (a) of Fig. 7～(d) of Fig. 7 is at gold
The side surface of metal elements is formed with the groove that the short transverse (above-mentioned columned short transverse) along above-mentioned hardware extends
Portion.The above-mentioned groove portion of (a) of Fig. 7 is the semicircle of the circle that cross section is radius 0.5mm of above-mentioned short transverse, in (b) of Fig. 7,
With the situation position away from weld part that the groove portion of (a) same shape of Fig. 7 is formed at (a) than Fig. 7, in (c) of Fig. 7,
Be formed at and identical position with the groove portion of (a) of Fig. 7, the situation same shape of (b) of Fig. 7, and, in the two groove portion it
Between be also formed with another groove portion.In (d) of Fig. 7, have by being formed on wider scope relatively shallowly truncated sides surface
Groove portion.Groove portion is there is not in (e) of Fig. 7.In (f) of Fig. 7, the side surface at hardware is formed along above-mentioned gold
The protuberance of the semi-cylindrical (radius of the semicircle of bottom surface is 0.5mm) that the short transverse of metal elements extends.It is formed at above-mentioned metal
The groove portion of the side surface of component, protuberance are equivalent to stress concentration portion.
It addition, the radius on the top (part come to a point) of generally tear type by the hardware in each insert molding body
(radius on the top in section view visual angle in short transverse) is set to R, by the top in the section view visual angle in short transverse to
The beeline of the side surface of resin component element is set to L, the insert molding under conditions of using in example 2 shown in table 2, table 3
Body.
The imagination six kinds of insert molding bodies shown in table 2, table 3, carry out simulation same as in Example 1.Table 2 illustrates simulation knot
Really.
[table 2]
[table 3]
From the results verification of table 2 to, if L shortens or R diminishes, then stress easily concentrates on weld part.
From the results verification of table 3 to, it is possible to by arranging stress concentration portion that is groove near frangible portion that is weld part
Portion, recess reduce the stress putting on weld part.
According to evaluation Example 1 and evaluation Example 7, the actual thermal shock test that carries out under the conditions of following thermal shock test, measure flat
All failure period numbers (using 10 insert molding bodies).
Table 4 illustrates measurement result.
(thermal shock test condition)
Temperature conditions :-40 DEG C～180 DEG C
Determination methods: by the generation of visual observations crackle
[table 4]
| Evaluation Example 12 | Evaluation Example 13 | |
| L | 0.5mm | 0.5mm |
| R | 0.2mm | 0.2mm |
| The shape of hardware | Fig. 7 (e) | Fig. 7 (a) |
| Average failure periodicity | 252 | 493 |
From the results verification of table 4 to, identical with analog result, even if following in the actual heat using insert molding body to carry out
In ring test, also eliminate because insert molding body is exposed to the crackle of the resin component element existed in the environment of variations in temperature and produce
Problem.
Description of reference numerals
1, insert molding body；10, resin component element；101, frangible portion；102, stress concentration portion；103, gap；11, structure is embedded
Part.
Claims (3)
1. an insert molding body, it is characterised in that
This insert molding body includes resin component element and embeds component；
Above-mentioned resin component element includes the more weak frangible portion of local mechanical intensity and is formed at the stress near above-mentioned frangible portion and concentrates
Portion,
Above-mentioned stress concentration portion is the local thickness local than the above-mentioned resin component element in above-mentioned frangible portion of above-mentioned resin component element
The thinner wall section that thickness is thin,
Refer near above-mentioned that stress concentration portion can make the stress resulting from above-mentioned frangible portion be in and be formed without stress concentration
The maximum stress position below that in the case of portion, frangible portion will not ftracture.
2. an insert molding body, it is characterised in that
This insert molding body includes resin component element and embeds component；
Above-mentioned resin component element includes the more weak frangible portion of local mechanical intensity and is formed at the stress near above-mentioned frangible portion and concentrates
Portion,
Above-mentioned frangible portion is present in the position deeper apart from the surface of above-mentioned resin component element；
Above-mentioned stress concentration portion is formed at the recess on above-mentioned surface；
The bottom of above-mentioned recess is present in the ratio deeper position, above-mentioned position existing for above-mentioned frangible portion,
Refer near above-mentioned that stress concentration portion can make the stress resulting from above-mentioned frangible portion be in and be formed without stress concentration
The maximum stress position below that in the case of portion, frangible portion will not ftracture.
3. an insert molding body, it is characterised in that
This insert molding body includes resin component element and embeds component；
Above-mentioned resin component element includes the more weak frangible portion of local mechanical intensity and is formed at the stress near above-mentioned frangible portion and concentrates
Portion,
Above-mentioned frangible portion is weld part or melt-coating part,
Refer near above-mentioned that stress concentration portion can make the stress resulting from above-mentioned frangible portion be in and be formed without stress concentration
The maximum stress position below that in the case of portion, frangible portion will not ftracture.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-250729 | 2011-11-16 | ||
| JP2011250729A JP2013103472A (en) | 2011-11-16 | 2011-11-16 | Insert molding |
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| Publication Number | Publication Date |
|---|---|
| CN103112121A CN103112121A (en) | 2013-05-22 |
| CN103112121B true CN103112121B (en) | 2016-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210458375.3A Active CN103112121B (en) | 2011-11-16 | 2012-11-14 | Insert molding body |
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| CN (1) | CN103112121B (en) |
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| JP6359047B2 (en) * | 2016-03-25 | 2018-07-18 | 株式会社タムラ製作所 | Resin mold core |
| JP6782195B2 (en) * | 2017-06-02 | 2020-11-11 | 株式会社ブリヂストン | Manufacturing method for injection molding dies, resin members, and resin products |
| JP2021041440A (en) * | 2019-09-12 | 2021-03-18 | マツダ株式会社 | Resistance welding method and resistance welding device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4134430C1 (en) * | 1991-10-18 | 1993-02-11 | Carlo 6148 Heppenheim De Finzer | Simple and reliable laminar component prodn. - includes curving pre-finished, magnetically conducting metal plate during pre-finishing and forming magnetisable plastic onto plate by e.g. press moulding |
| CN1261131A (en) * | 1999-01-20 | 2000-07-26 | 孙晶 | Arc-shaped elastic metal-plastic bush |
| DE102004031598A1 (en) * | 2004-06-30 | 2006-02-09 | Robert Bosch Gmbh | Stress-free encapsulation of inserts, in particular electrical components, in a plastic housing, involves coating insert in material with different thermal expansion coefficient to those of insert and housing plastic |
| CN103228419A (en) * | 2010-11-29 | 2013-07-31 | 宝理塑料株式会社 | Insert molded body and method for producing insert molded body |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4701882B2 (en) * | 2005-07-08 | 2011-06-15 | パナソニック株式会社 | Vacuum insulation |
| JP5326814B2 (en) * | 2009-05-26 | 2013-10-30 | パナソニック株式会社 | Injection mold equipment |
-
2011
- 2011-11-16 JP JP2011250729A patent/JP2013103472A/en active Pending
-
2012
- 2012-11-14 CN CN201210458375.3A patent/CN103112121B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4134430C1 (en) * | 1991-10-18 | 1993-02-11 | Carlo 6148 Heppenheim De Finzer | Simple and reliable laminar component prodn. - includes curving pre-finished, magnetically conducting metal plate during pre-finishing and forming magnetisable plastic onto plate by e.g. press moulding |
| CN1261131A (en) * | 1999-01-20 | 2000-07-26 | 孙晶 | Arc-shaped elastic metal-plastic bush |
| DE102004031598A1 (en) * | 2004-06-30 | 2006-02-09 | Robert Bosch Gmbh | Stress-free encapsulation of inserts, in particular electrical components, in a plastic housing, involves coating insert in material with different thermal expansion coefficient to those of insert and housing plastic |
| CN103228419A (en) * | 2010-11-29 | 2013-07-31 | 宝理塑料株式会社 | Insert molded body and method for producing insert molded body |
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| Publication number | Publication date |
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| CN103112121A (en) | 2013-05-22 |
| JP2013103472A (en) | 2013-05-30 |
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