CN109531922A - A kind of self-propelled interlayer injection moulding method - Google Patents
A kind of self-propelled interlayer injection moulding method Download PDFInfo
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- CN109531922A CN109531922A CN201811325162.7A CN201811325162A CN109531922A CN 109531922 A CN109531922 A CN 109531922A CN 201811325162 A CN201811325162 A CN 201811325162A CN 109531922 A CN109531922 A CN 109531922A
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- 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
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1642—Making multilayered or multicoloured articles having a "sandwich" structure
- B29C45/1643—Making multilayered or multicoloured articles having a "sandwich" structure from at least three different materials or with at least four layers
-
- 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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
-
- 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
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/78—Measuring, controlling or regulating of temperature
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76531—Temperature
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76551—Time
- B29C2945/76561—Time duration
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
A kind of self-propelled interlayer injection moulding method, comprising the following steps: the mould temperature that injection molding machine is arranged in A. is 55 DEG C ~ 70 DEG C, and main platform temperature of penetrating is 220 DEG C ~ 240 DEG C, and it is 200 DEG C ~ 220 DEG C that pair, which penetrates platform temperature, and hot-fluid channel temp is 200 DEG C ~ 220 DEG C；B. reach in step A after range after temperature, pair penetrates platform and first injects TPE in die cavity, and then main platform of penetrating injects PP in die cavity, and pair penetrates platform at this time and master penetrates platform and works, and continues for some time；C. pair penetrates platform and first stops being fed, and after a period of time, main platform of penetrating stops feed, simultaneity factor pressure maintaining several seconds；D. system is cooling, die sinking, pickup.The present invention passes through the control and optimization to material injecting glue temperature, time, ratio, pressure, make to pad appearance TPE flexible glue in prepared glove box, shock-absorbing silencing function is strong, inner sandwich layer is PP ebonite, and rigid structure is strong, and overall structure is unlikely to deform, long service life, the setting of mixed transition layer simultaneously makes material molding be evenly distributed from during pushing away, and product quality is high, and integrated artistic is simple.
Description
Technical field
The invention belongs to auto-parts injection molding arts, and in particular to a kind of self-propelled folder for padding in automobile glove box
Layer injection moulding process.
Background technique
With the raising of Living consumption and the development of automobile industry, family car is more more and more universal, this also drives
The fast development of the enterprises such as automobile industry upstream and downstream, automobile parts.In automobile parts, automobile glove box is one kind of standard configuration, mesh
Before, the structure of the automobile glove box of medium-to-high grade vehicle generally comprises the interior pad on openable outer housing and attachment on the inner wall of the housing
Layer, the setting one of inner cushion layer make glove box aesthetic interior, and two can play the purpose of damping and silencing.
In the prior art, in order to achieve the purpose that good damping and silencing, the inner cushion layer of glove box is generally by very flexible
Material is made, and such as TPE class flexible glue, but this kind of material price is higher, leads to increased costs, while excessively soft, easy to damage.If interior
Bed course is made of hard material, then is easy to generate noise in collision process, brings bad usage experience.In some of the above
On the basis of problem, now also the paid method for using interlayer to be molded produces inner cushion layer in the industry, but production technology is different,
Easily occur that interlayer is uneven, flexible outer is damaged, hard internal layer thickness is different, ectonexine separation etc. one in production process simultaneously
A little problems, this undoubtedly reduces the yields of product, increases entreprise cost.
Therefore, enterprising based on some problems, the interlayer injection moulding method that the present invention pads in automobile glove box present on
Further research is gone.
Summary of the invention
For the above deficiency in the prior art, the present invention provides a kind of self-propelled interlayer injection moulding method, simple processes
Easy to operate, pad in the automobile glove box for producing sandwich that can be stable, yields is high, has saved entreprise cost.
In order to solve the above-mentioned technical problem, the present invention is addressed by following technical proposals.
A kind of self-propelled interlayer injection moulding method, comprising the following steps: the mould temperature that injection molding machine is arranged in A. is 55 DEG C ~ 70 DEG C, main
Penetrating platform temperature is 220 DEG C ~ 240 DEG C, and it is 200 DEG C ~ 220 DEG C that pair, which penetrates platform temperature, and hot-fluid channel temp is 200 DEG C ~ 220 DEG C；B. to temperature
Degree reaches in step A after range, and pair penetrates platform and first injects TPE in die cavity, and then main platform of penetrating injects PP in die cavity, and pair is penetrated at this time
Platform and master penetrate platform and work, and continue for some time；C. pair penetrates platform and first stops being fed, and after a period of time, main platform of penetrating stops feed, together
When the system pressure maintaining several seconds；D. system is cooling, die sinking, pickup.
In the prior art, pad is usually that pure flexible glue is made or pure ebonite is made in glove box, if using pure flexible glue
Material is soft, and shock-proof effect is good, while also having good defencive function to the article being placed in glove box, but interior pad over time
It is easily deformed, and flexible glue is at high cost.It is at low cost if using pure ebonite, long service life, but since its material is harder, with
Peripheral appendix member is hard contact, and periphery is easy to loosen and collide with over time, generates noise, influences passenger experience.In the prior art,
There is interior pad made of epoxy glue, inherit the advantage of the two kinds of materials in part, has taken into account surface softness, integral rigidity, also eliminated
Local collision noise, but this is also a kind of compromise, do not embody the optimal performance of respective material.
Pad in prepared glove box in the application, outer layer are TPE flexible glue, and inner sandwich layer is PP ebonite, and surface has completely
There is the softness of TPE flexible glue, while PP inner sandwich layer deform overall structure will not, long service life as skeletal support.
In injection moulding process in the application, after temperature is suitable, first by TPE flexible glue injection type chamber, the TPE flexible glue is by shape
At the surface layer padded in glove box, TPE flexible glue and PP ebonite are then injected simultaneously, forms transition zone, are increased between unlike material layer
Bonding force, prevent from disengaging, at the same should during, the transition zones of the mixed materials is by TPE flexible glue layer to the vacant place in type chamber periphery
It pushes, is formed from the effect pushed away.Finally, forming the interior hard inner core layer padded, during being somebody's turn to do, note being separately injected into PP ebonite layer
The PP material entered enters in type chamber from coupler, while pushing original TPE and mixture to periphery, until being full of entire type
Chamber, formed product after cooling.
Applicant has done the best the trials of distinct methods many times in R&D process, the techniques such as selects from temperature, material
On the optimum choice that does.In the cut-and-try process of early period, TPE flexible glue is first injected into type chamber by applicant, then PP glue is injected into
In type chamber, the not no transition state of simultaneous implantation between the two, the interior pad of this technique preparation, wherein PP material is due to cooling solid
Change very fast, it is difficult to it is uniformly distributed in type chamber, product periphery TPE material is more, and the PP material near inlet is more and thicker,
Product is uniformly poor, influences using while neighboring is excessively soft easily-deformable, after a period of time use, also will appear two kinds of materials
Between matter the phenomenon that delamination.After applicant continuously attempts to and optimizes to technique, TPE and PP are increased during injecting glue while being infused
The stage entered, this phenomenon of very good solution make integral material be evenly distributed, and contact is good between material, improve production
The product service life.
Preferably, in step B: reach in step A after range after temperature, pair penetrates platform and first injects TPE in die cavity, and 1.8
Second ~ after 2.2 seconds, main platform of penetrating injects PP in die cavity, and pair penetrates platform at this time and master penetrates platform and works, and continues 0.7 second ~ 1.3 seconds.
Preferably, in step C: pair penetrates platform and first stops being fed, and after 1.8 seconds ~ 2.2 seconds, main platform of penetrating stops feed, is simultaneously
Blanket insurance is pressed 1 second ~ 3 seconds.
Preferably, in step B: reach in step A after range after temperature, pair penetrates platform and first injects TPE in die cavity, and 2 seconds
Afterwards, main platform of penetrating injects PP in die cavity, and pair penetrates platform at this time and master penetrates platform and works, for 1 seconds；In step C: pair is penetrated platform and is first stopped
Feed, after 2 seconds, main platform of penetrating stops being fed, and simultaneity factor pressure maintaining 2 seconds.
Preferably, in step A: the mould temperature that injection molding machine is arranged is 60 DEG C, and main platform temperature of penetrating is 230 DEG C, and pair penetrates platform temperature
It is 210 DEG C, hot-fluid channel temp is 210 DEG C.
Preferably, the weight ratio of the secondary TPE for penetrating platform injection and the main PP for penetrating platform injection are 7:3 ~ 5:5, preferably 6:4.
Preferably, the main pressure for penetrating platform is set as 85/20bar, the pressure that pair penetrates platform is set as 145/95bar.
Preferably, in step D, 10 seconds board storing time, mold cooling time 25 seconds, die sinking and 8 seconds cooling times.
Compared with prior art, the invention has the following advantages: providing a kind of self-propelled interlayer injection moulding method,
By the control and optimization to material injecting glue temperature, time, ratio, pressure, keep pad appearance TPE in prepared glove box soft
Glue, shock-absorbing silencing function is strong, and inner sandwich layer is PP ebonite, and rigid structure is strong, and overall structure is unlikely to deform, long service life, simultaneously
The setting of mixed transition layer makes material molding be evenly distributed from during pushing away, and product quality is high.Integrated artistic is simple, high-efficient.
Detailed description of the invention
Fig. 1 is the side view for the injection molding machine that the injection moulding process in the present invention is related to.
Fig. 2 is the top view for the injection molding machine that the injection moulding process in the present invention is related to.
Fig. 3 is the cross-sectional view one for the injection molding machine that the injection moulding process in the present invention is related to.
Fig. 4 is the cross-sectional view two for the injection molding machine that the injection moulding process in the present invention is related to.
Fig. 5 is the diagrammatic cross-section of pad in the glove box of the injection moulding process preparation in the present invention.
Fig. 6 is the enlarged diagram of a-quadrant in Fig. 5.
Specific embodiment
Present invention is further described in detail with specific embodiment with reference to the accompanying drawing.
A kind of self-propelled interlayer injection moulding method being related to referring to figs. 1 to Fig. 6, in the present invention, comprising the following steps: A. is set
The mould temperature for setting injection molding machine is 55 DEG C ~ 70 DEG C, and main platform temperature of penetrating is 220 DEG C ~ 240 DEG C, and it is 200 DEG C ~ 220 DEG C that pair, which penetrates platform temperature, heat
Runner temperature is 200 DEG C ~ 220 DEG C；B. reach in step A after range after temperature, pair penetrates platform and first injects TPE in die cavity, then
Main platform of penetrating injects PP in die cavity, and pair penetrates platform at this time and master penetrates platform and works, and continues for some time；C. pair penetrates platform and first stops supplying
Material, after a period of time, main platform of penetrating stops feed, simultaneity factor pressure maintaining several seconds；D. system is cooling, die sinking, pickup.
In above step, specifically, in step A: the mould temperature that injection molding machine is arranged is 60 DEG C, and main platform temperature of penetrating is 230 DEG C, secondary
Penetrating platform temperature is 210 DEG C, and hot-fluid channel temp is 210 DEG C.In step B: reaching in step A after range after temperature, pair is penetrated platform and first incited somebody to action
TPE is injected in die cavity, and after 1.8 seconds ~ 2.2 seconds, after preferably 2 seconds, main platform of penetrating injects PP in die cavity, and pair penetrates platform at this time and master penetrates platform
It works, continues 0.7 second ~ 1.3 seconds, preferably 1 second.In step C: pair penetrates platform and first stops being fed, after 1.8 seconds ~ 2.2 seconds, preferably 2 seconds
Afterwards, main platform of penetrating stops being fed, and simultaneity factor pressure maintaining 1 second ~ 3 seconds, preferably 2 seconds.In step D, 10 seconds board storing time, mold is cold
But time 25 seconds, die sinking and 8 seconds cooling times.
In addition, the weight ratio that pair penetrates the TPE and the main PP for penetrating platform injection of platform injection is 7:3 ~ 5:5, preferably in the application
6:4.The main pressure for penetrating platform is set as 85/20bar, and the pressure that pair penetrates platform is set as 145/95bar.
Fig. 1 to Fig. 4 is the schematic diagram of the injection molding machine designed in the present invention, and it is specially straight to can be seen that the injection molding machine in figure
Angle-style double coloured plastic injection machine, as can be seen that the structure of the injection molding machine from top to bottom is followed successively by upper mounted plate 2, first from cross-sectional view
Hot runner manifold 3, the second hot runner manifold 4, third hot runner manifold 6, cope plate 7, upper cores 71, lower mode 81, lower template 8, support block
10, face needle plate 11, bottom needle plate 12, bottom plate 13 are formed with type chamber, the group of the above structure between upper cores 71 and lower mode 81
Dress relationship is the prior art.Wherein, the top of the injection molding machine is equipped with master and penetrates platform glue-feeder 1, and the side of injection molding machine is penetrated equipped with pair
Platform glue-feeder 5, master penetrates platform glue-feeder 1 and pair penetrates platform glue-feeder 5 for corresponding material to be driven into type by type chamber glue-feeder 9
In chamber.The method that the injection molding of the interlayer in the application may be implemented in above injection molding machine.
The following are the specific embodiments of self-propelled interlayer injection moulding method under the different technology conditions in the application, implement below
In example and comparative example, TPE(Thermoplastic Elastomer) it is a kind of thermoplastic elastic material, it is commercially available commercially available, it is excellent
Being selected as polyvinyl chloride-base TPE or polyurethanes TPE, PP is polypropylene, commercially available commercially available, and both of which is common former in industry
Material.The main pressure for penetrating platform is set as 85/20bar, and the pressure that pair penetrates platform is set as 145/95bar.
Embodiment 1: a kind of self-propelled interlayer injection moulding method, comprising the following steps: the mould temperature that injection molding machine is arranged in A. is 55 DEG C
DEG C, main platform temperature of penetrating is 240 DEG C, and it is 200 DEG C that pair, which penetrates platform temperature, and hot-fluid channel temp is 200 DEG C；B. reach in step A to temperature
After range, pair penetrates platform and first injects TPE in die cavity, and after 1.8 seconds, main platform of penetrating injects PP in die cavity, and pair penetrates platform at this time and master penetrates
Platform works, and continues 1.3 seconds；C. pair penetrates platform and first stops being fed, and after 1.8 seconds, main platform of penetrating stops being fed, and simultaneity factor pressure maintaining 3 seconds；
D. board storing time 10 seconds, mold cooling time 25 seconds, die sinking and 8 seconds cooling times.During integral molded plastic, pair is penetrated platform and is penetrated
The weight ratio of TPE and the main PP for penetrating platform injection out are 7:3.
A kind of embodiment 2: self-propelled interlayer injection moulding method, comprising the following steps: the mould temperature that injection molding machine is arranged in A. is 70 DEG C,
Main platform temperature of penetrating is 220 DEG C, and it is 220 DEG C that pair, which penetrates platform temperature, and hot-fluid channel temp is 220 DEG C；B. reach range in step A to temperature
Afterwards, pair penetrates platform and first injects TPE in die cavity, and after 2.2 seconds, main platform of penetrating injects PP in die cavity, and pair penetrates platform at this time and main to penetrate platform equal
Work, continues 0.7 second；C. pair penetrates platform and first stops being fed, and after 2.2 seconds, main platform of penetrating stops being fed, and simultaneity factor pressure maintaining 1 second；D.
10 seconds board storing time, mold cooling time 25 seconds, die sinking and 8 seconds cooling times.During integral molded plastic, pair penetrates platform injection
TPE and the weight ratio of the main PP for penetrating platform injection be 1:1.
A kind of embodiment 3: self-propelled interlayer injection moulding method, comprising the following steps: the mould temperature that injection molding machine is arranged in A. is 60 DEG C,
Main platform temperature of penetrating is 230 DEG C, and it is 210 DEG C that pair, which penetrates platform temperature, and hot-fluid channel temp is 210 DEG C；B. reach range in step A to temperature
Afterwards, pair penetrates platform and first injects TPE in die cavity, and after 2 seconds, main platform of penetrating injects PP in die cavity, and pair penetrates platform at this time and master penetrates the equal work of platform
Make, it is for 1 seconds；C. pair penetrates platform and first stops being fed, and after 2 seconds, main platform of penetrating stops being fed, and simultaneity factor pressure maintaining 2 seconds；D. board storing
Time 10 seconds, mold cooling time 25 seconds, die sinking and 8 seconds cooling times.During integral molded plastic, pair penetrate platform injection TPE with
The weight ratio of the main PP for penetrating platform injection is 6:4.
A kind of embodiment 4: self-propelled interlayer injection moulding method, comprising the following steps: the mould temperature that injection molding machine is arranged in A. is 65 DEG C,
Main platform temperature of penetrating is 235 DEG C, and it is 205 DEG C that pair, which penetrates platform temperature, and hot-fluid channel temp is 220 DEG C；B. reach range in step A to temperature
Afterwards, pair penetrates platform and first injects TPE in die cavity, and after 2.1 seconds, main platform of penetrating injects PP in die cavity, and pair penetrates platform at this time and main to penetrate platform equal
Work, continues 0.9 second；C. pair penetrates platform and first stops being fed, and after 1.9 seconds, main platform of penetrating stops being fed, and simultaneity factor pressure maintaining 1.5 seconds；D.
10 seconds board storing time, mold cooling time 25 seconds, die sinking and 8 seconds cooling times.
A kind of comparative example 1: self-propelled interlayer injection moulding method, comprising the following steps: the mould temperature that injection molding machine is arranged in A. is 60 DEG C,
Main platform temperature of penetrating is 230 DEG C, and it is 210 DEG C that pair, which penetrates platform temperature, and hot-fluid channel temp is 210 DEG C；B. reach range in step A to temperature
Afterwards, pair penetrates platform and first injects TPE in die cavity, and after 3 seconds, pair penetrates platform and stops feed, and and then main platform of penetrating injects PP in die cavity, and 3
After second, main platform of penetrating stops being fed, and simultaneity factor pressure maintaining 2 seconds；C. board storing time 10 seconds, mold cooling time 25 seconds, die sinking
And 8 seconds cooling times.During integral molded plastic, the weight ratio that pair penetrates the TPE and the main PP for penetrating platform injection of platform injection is 6:4.
A kind of comparative example 2: self-propelled interlayer injection moulding method, comprising the following steps: the mould temperature that injection molding machine is arranged in A. is 65 DEG C,
Main platform temperature of penetrating is 210 DEG C, and it is 200 DEG C that pair, which penetrates platform temperature, and hot-fluid channel temp is 190 DEG C；B. reach range in step A to temperature
Afterwards, pair penetrates platform and first injects TPE in die cavity, and after 2 seconds, main platform of penetrating injects PP in die cavity, and pair penetrates platform at this time and master penetrates the equal work of platform
Make, it is for 1 seconds；C. pair penetrates platform and first stops being fed, and after 2 seconds, main platform of penetrating stops being fed, and simultaneity factor pressure maintaining 2 seconds；D. board storing
Time 10 seconds, mold cooling time 25 seconds, die sinking and 8 seconds cooling times.During integral molded plastic, pair penetrate platform injection TPE with
The weight ratio of the main PP for penetrating platform injection is 6:4.
A kind of comparative example 3: self-propelled interlayer injection moulding method, comprising the following steps: the mould temperature that injection molding machine is arranged in A. is 70 DEG C,
Main platform temperature of penetrating is 250 DEG C, and it is 230 DEG C that pair, which penetrates platform temperature, and hot-fluid channel temp is 230 DEG C；B. reach range in step A to temperature
Afterwards, pair penetrates platform and first injects TPE in die cavity, and after 2 seconds, main platform of penetrating injects PP in die cavity, and pair penetrates platform at this time and master penetrates the equal work of platform
Make, it is for 1 seconds；C. pair penetrates platform and first stops being fed, and after 2 seconds, main platform of penetrating stops being fed, and simultaneity factor pressure maintaining 2 seconds；D. board storing
Time 10 seconds, mold cooling time 25 seconds, die sinking and 8 seconds cooling times.During integral molded plastic, pair penetrate platform injection TPE with
The weight ratio of the main PP for penetrating platform injection is 6:4.
It is padded in prepared glove box in above embodiments 1 to 4, surface is TPE flexible glue layer, and matter is soft, good hand touch, shock-absorbing
Effect is good, will not generate the noise that collides with；Inner sandwich layer is PP material layers simultaneously, and matter is hard, ensure that the integrally-built stabilization of interior pad
Property and robustness, improve the service life of product.Meanwhile there is mixing injection stage in the injection moulding process in the application, it should
Stage, directly master penetrated platform and pair penetrates platform material feeding simultaneously not by the way of mixture injection, improved efficiency；What the step was formed
The mixing bed of material is between TPE flexible glue layer and PP material layers, and mixture can be pushed into type cavity edge under high pressure when injection molding, if directly
It connects and comparatively fast is difficult to be pushed at type cavity edge since it solidifies using PP material, later product does not conform to rate height；Depositing for the bed of material is mixed simultaneously
Bond properties on improving product between unlike material, will not delamination.
It is padded in prepared glove box in the above comparative example 1 to 3, wherein due to having lacked mixing material feeding in comparative example 1
In the stage, so that PP material is difficult to be pulled to glove box edge, overall distribution is uneven, in the product produced, marginal portion TPE material
Material distribution is more, so that marginal portion is excessively soft.In comparative example 2, internal temperature is lower than the temperature range optimized, so that PP
Material pushes difficulty open, and PP material is also difficult to be pulled to glove box edge, and overall distribution is uneven, in the product produced, edge part
Divide TPE material distribution more, so that marginal portion is excessively soft.In comparative example 3, internal temperature is higher than the temperature model optimized
It encloses, this makes on some marginal positions, and PP material is excessively pushed open, and the TPE flexible glue on these positions is excessively thin, in use process
It is easy breakage, life of product is not grown.
In attached drawing, attached drawing 5 to 6 show the schematic diagram padded in glove box prepared by the injection moulding process in the present invention, should
Pad 9 is placed in the glove box of automobile in glove box, as can be seen that the surface layer of pad 9 is TPE flexible glue layer 92 in the glove box in Fig. 6,
Inside is PP inner sandwich layer 91, is the mixing bed of material 93 between TPE flexible glue layer 92 and PP inner sandwich layer 91.
In the prior art, pad is usually that pure flexible glue is made or pure ebonite is made in glove box, if using pure flexible glue
Material is soft, and shock-proof effect is good, while also having good defencive function to the article being placed in glove box, but interior pad over time
It is easily deformed, and flexible glue is at high cost.It is at low cost if using pure ebonite, long service life, but since its material is harder, with
Peripheral appendix member is hard contact, and periphery is easy to loosen and collide with over time, generates noise, influences passenger experience.In the prior art,
There is interior pad made of epoxy glue, inherit the advantage of the two kinds of materials in part, has taken into account surface softness, integral rigidity, also eliminated
Local collision noise, but this is also a kind of compromise, do not embody the optimal performance of respective material.
Pad in prepared glove box in the application, outer layer are TPE flexible glue, and inner sandwich layer is PP ebonite, and surface has completely
There is the softness of TPE flexible glue, while PP inner sandwich layer deform overall structure will not, long service life as skeletal support.
Meanwhile also there is the mixing bed of material, as transition zone, increases the bonding force between unlike material layer, prevent from disengaging.
The above, present invention tool provide a kind of self-propelled interlayer injection moulding method, by material injecting glue temperature, when
Between, the control and optimization of ratio, pressure, make to pad appearance TPE flexible glue in prepared glove box, shock-absorbing silencing function is strong, interior
Sandwich layer is PP ebonite, and rigid structure is strong, and overall structure is unlikely to deform, long service life, while the setting of mixed transition layer makes material
Material molding is evenly distributed from during pushing away, and product quality is high.Integrated artistic is simple, high-efficient.
Protection scope of the present invention includes but is not limited to embodiment of above, and protection scope of the present invention is with claims
Subject to, replacement, deformation, the improvement that those skilled in the art that any pair of this technology is made is readily apparent that each fall within of the invention
Protection scope.
Claims (8)
1. a kind of self-propelled interlayer injection moulding method, which comprises the following steps:
A. the mould temperature that injection molding machine is arranged is 55 DEG C ~ 70 DEG C, and main platform temperature of penetrating is 220 DEG C ~ 240 DEG C, pair penetrate platform temperature be 200 DEG C ~
220 DEG C, hot-fluid channel temp is 200 DEG C ~ 220 DEG C；
B. reach in step A after range after temperature, pair penetrates platform and first injects TPE in die cavity, and then master penetrates platform and PP is injected die cavity
In, pair penetrates platform at this time and master penetrates platform and works, and continues for some time；
C. pair penetrates platform and first stops being fed, and after a period of time, main platform of penetrating stops feed, simultaneity factor pressure maintaining several seconds；
D. system is cooling, die sinking, pickup.
2. a kind of self-propelled interlayer injection moulding method according to claim 1, which is characterized in that in step B: reaching to temperature
In step A after range, pair penetrates platform and first injects TPE in die cavity, and after 1.8 seconds ~ 2.2 seconds, main platform of penetrating injects PP in die cavity, at this time
Pair penetrates platform and master penetrates platform and works, and continues 0.7 second ~ 1.3 seconds.
3. a kind of self-propelled interlayer injection moulding method according to claim 2, which is characterized in that in step C: pair is penetrated platform and first stopped
Only it is fed, after 1.8 seconds ~ 2.2 seconds, main platform of penetrating stops being fed, and simultaneity factor pressure maintaining 1 second ~ 3 seconds.
4. a kind of self-propelled interlayer injection moulding method according to claim 3, which is characterized in that in step B: reaching to temperature
In step A after range, pair penetrates platform and first injects TPE in die cavity, and after 2 seconds, main platform of penetrating injects PP in die cavity, at this time pair penetrate platform and
Master penetrates platform and works, for 1 seconds；In step C: pair penetrates platform and first stops being fed, and after 2 seconds, main platform of penetrating stops feed, and simultaneity factor is protected
Pressure 2 seconds.
5. a kind of self-propelled interlayer injection moulding method according to claim 4, which is characterized in that in step A: setting injection molding machine
Mould temperature be 60 DEG C, main platform temperature of penetrating is 230 DEG C, and it is 210 DEG C that pair, which penetrates platform temperature, and hot-fluid channel temp is 210 DEG C.
6. a kind of self-propelled interlayer injection moulding method according to any one of claims 1 to 5, which is characterized in that pair is penetrated platform and penetrated
The weight ratio of TPE and the main PP for penetrating platform injection out are 7:3 ~ 5:5.
7. a kind of self-propelled interlayer injection moulding method according to any one of claims 1 to 5, which is characterized in that master penetrates platform
Pressure is set as 85/20bar, and the pressure that pair penetrates platform is set as 145/95bar.
8. a kind of self-propelled interlayer injection moulding method according to any one of claims 1 to 5, which is characterized in that in step D,
10 seconds board storing time, mold cooling time 25 seconds, die sinking and 8 seconds cooling times.
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Application publication date: 20190329 |