CN106671347A - Injection molding method and plastic part - Google Patents
Injection molding method and plastic part Download PDFInfo
- Publication number
- CN106671347A CN106671347A CN201710016210.3A CN201710016210A CN106671347A CN 106671347 A CN106671347 A CN 106671347A CN 201710016210 A CN201710016210 A CN 201710016210A CN 106671347 A CN106671347 A CN 106671347A
- Authority
- CN
- China
- Prior art keywords
- injection moulding
- injection
- pressure
- speed
- predetermined
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/03—Injection moulding apparatus
-
- 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
- B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
-
- 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
- B29C2945/76498—Pressure
-
- 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
-
- 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
- B29C2945/76595—Velocity
Abstract
The invention provides an injection molding method and a plastic part. The injection molding method comprises the following steps that step (104), a fixed mold body and a flexible mold body of a mold is combined so as to jack an insert, and thus a product cavity is formed; step (106), a preset number of injection molding materials are injected to the cavity of the mold; step (108), when the injection molding speed is a first preset injection speed, and the injection molding pressure is a first preset pressure, pressure is maintained for first preset time; and step (110), when the injection molding speed is a second preset injection speed, and the injection molding pressure is a second preset pressure, pressure is maintained for second preset time. The part, close to the cavity wall, of the injection molding materials is cooled through pressure maintaining for a short period of time under the first preset pressure, an outer layer is formed, and the situation that a flash does not generate after the plastic part is formed is ensured; and the problem that the plastic part has the flash is effectively solved, the appearance quality of the plastic part is improved, the satisfaction degree of customers is improved, and products are more conform to the requirements of the customers.
Description
Technical field
The present invention relates to injection molding technology field, in particular to a kind of injection moulding process and plastic parts.
Background technology
At present, in the related, in injection, because cavity pressure is higher, injection raw material is in solidification for plastic parts
In the front bonding crack that can enter into mould various pieces, burr is this creates the terminal；As shown in figure 1, buttons of the region A for plastic parts
Position, region B is the deep muscle position of plastic parts, and region C is the parting line of plastic parts, is plastic parts at region A, B, C and easily occurs
The position of burr；As shown in Fig. 2 oblique top lines of the region D for mould, region E is the mold insert line of mould, and region F is dividing for mould
Molded line, region D, E, F are the position for easily producing burr；There is showing for burr by the plastic parts generally existing of injection mo(u)lding
As, the presentation quality of plastic parts has been had a strong impact on, nowadays competing more and more fierce consumption market, the very poor product of presentation quality
Product are difficult to meet the requirement of client.Therefore, it is to improve product appearance quality, designs a kind of injection that can solve the problems, such as burr
Method is very necessary.
The content of the invention
It is contemplated that at least solving one of technical problem present in prior art or correlation technique.
For this purpose, first purpose of the present invention is to propose a kind of injection moulding process.
Second object of the present invention is to propose a kind of plastic parts.
In view of this, first purpose of the invention, the invention provides a kind of injection moulding process, including：Step
104, by the cover half of mould and dynamic model matched moulds, hold out against insert and form product die cavity；Step 106, the injection raw material of scheduled volume is noted
In entering the die cavity of mould；Step 108, is the first predetermined injection moulding speed and injection pressure is the first predetermined pressure in injection moulding speed
During situation, the scheduled time of pressurize first；Step 110, is that the second predetermined injection moulding speed and injection pressure are second in injection moulding speed
During the situation of predetermined pressure, the scheduled time of pressurize second.
Injection moulding process provided by the present invention, by carry out in the case of the first predetermined pressure one section of pressurize it is shorter when
Between, and the first predetermined pressure is less, and injection raw material will not enter into the bonding crack of mould in the case of the first predetermined pressure
In, through first scheduled time, the part near cavity wall cools down in advance, defines crust, then pressure it is higher the
Pressurize is carried out under two predetermined pressures, even if the second predetermined pressure is very high, due to the cooling shaping of the injection raw material at bonding crack,
Not further into in bonding crack, and the shell for being formed can stop in the bonding crack that remaining injection raw material is entered, it is ensured that modeling
Glue part will not produce after shaping burr, efficiently solve plastic parts and there is a problem of burr, improve the outward appearance of plastic parts
Quality, more improves the satisfaction of client, makes product more conform to the requirement of client.
In addition, the injection moulding process in the above-mentioned technical proposal of present invention offer can also have following additional technical feature：
In above-mentioned technical proposal, it is preferable that before step 104, injection moulding process also includes：Step 100, mould is consolidated
On the injection machine matched with mould.
In the technical scheme, by the way that mould is fixed on the injection machine matched with it, mould can be made in injection
During, burr will not be produced because clamp force deficiency or pressure are excessive, improve the stability in injection moulding process.
In above-mentioned technical proposal, it is preferable that after step 110, injection moulding process also includes：Step 112, mould is opened
Mould simultaneously ejects the product being molded by.
In the technical scheme, by product automatic ejection after mould die sinking, production efficiency is effectively improved；And avoid
Artificial pickup, reduces the operation of workman, reduces the labor intensity of workman.
In above-mentioned technical proposal, it is preferable that in step 106, the injection raw material of scheduled volume is to fill mold cavity
Required injection raw material.
In the technical scheme, injected in die cavity by the injection raw material that will fill can die cavity so that the shell of formation
Full zero defect, is effectively guaranteed the presentation quality of product.
In above-mentioned technical proposal, it is preferable that the first predetermined injection moulding speed is less than the second predetermined injection moulding speed；First makes a reservation for
Pressure is less than the second predetermined pressure.
In the technical scheme, by the way that the first predetermined injection moulding speed is set smaller than into the second predetermined injection moulding speed；First
Predetermined pressure is set smaller than the second predetermined pressure so that in injection moulding process, first shell is formed in the case of little pressure, then
Pressurize under a large pressure, improves the density of workpiece and the intensity of workpiece itself.
In above-mentioned technical proposal, it is preferable that the first predetermined injection moulding speed is the 10% of the maximum injection moulding speed of injection machine
To 20%.
In above-mentioned technical proposal, it is preferable that the first predetermined pressure is more than or equal to 5MPa, less than or equal to 25MPa.
In the technical scheme, by by the first predetermined injection moulding speed be set to injection machine maximum injection moulding speed 10% to
20%, the first predetermined pressure is set to into 5MPa to 25MPa, the raw material that can be efficiently avoid in die cavity is entered in bonding crack
And form burr.
In above-mentioned technical proposal, it is preferable that first scheduled time was more than or equal to 0.5s, less than or equal to 2s.
In the technical scheme, by the way that first scheduled time was set to into 0.5s to 2s, it is to avoid the pressurize under low speed low pressure
Overlong time and make the excessive sizing of plastic parts, in the case of low speed low pressure shape plastic parts density it is low, intensity difference, and
Modification amount is big, so make plastic material solidify a shell in the short time in the case of low pressure low speed, then in height
Continue to cool down under fast high pressure, be effectively guaranteed the mechanical property of plastic parts.
In above-mentioned technical proposal, it is preferable that the first predetermined injection moulding speed is the 15% of the maximum injection moulding speed of injection machine；
First predetermined pressure is 10MPa；First scheduled time was 1s.
In the technical scheme, plastic material can be made to solidify the appropriate shell of thin and thick, it is ensured that the plastic parts after molding
Burr will not be produced, the presentation quality of plastic parts is effectively improved.
In above-mentioned technical proposal, it is preferable that the second predetermined injection moulding speed is the specified injection moulding speed of product；Second makes a reservation for
Pressure is the specified injection pressure of product；Second scheduled time was the specified injection time of product.
In the technical scheme, by the specified injection time of the pressurize under specified injection moulding speed and injection pressure, have
Deflection after ensure that to effect the density of plastic parts and cooling down, makes plastic parts that not only there is good presentation quality also to have excellent
Elegant mechanical property.
In above-mentioned technical proposal, it is preferable that before step 104, injection moulding process also includes：Step 102, arranges injection
The corresponding parameter of method.
In the technical scheme, by arranging corresponding parameter, effectively ensuring injection moulding process is smoothly carried out.
Second purpose of the invention, the invention provides a kind of plastic parts, the plastic parts is by any of the above-described skill
Injection moulding process injection mo(u)lding described in art scheme, therefore, the moulding possesses the injection moulding process described in any of the above-described technical scheme
Whole beneficial effects.
The additional aspect and advantage of the present invention will be set forth in part in the description, and partly will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from the description with reference to accompanying drawings below to embodiment
It is substantially and easy to understand, wherein：
Fig. 1 shows the schematic diagram of the position for occurring burr in correlation technique on plastic parts；
Fig. 2 shows the schematic diagram of the position for occurring burr in correlation technique on mould；
Fig. 3 shows the flow chart of injection machine injection moulding process according to an embodiment of the invention；
Fig. 4 shows schematic diagram of the plastic material according to an embodiment of the invention in die cavity internal flow；
Fig. 5 shows plastic parts integral molded plastic process chart according to an embodiment of the invention.
Wherein, the corresponding relation between the reference and component names in Fig. 4 is：
10 cavity walls, 20 shells, 30 injection raw materials.
Specific embodiment
It is below in conjunction with the accompanying drawings and concrete real in order to be more clearly understood that the above objects, features and advantages of the present invention
Apply mode to be further described in detail the present invention.It should be noted that in the case where not conflicting, the enforcement of the application
Feature in example and embodiment can be mutually combined.
Many details are elaborated in the following description in order to fully understand the present invention, but, the present invention may be used also
Implemented with being different from other modes described here using other, therefore, protection scope of the present invention is not by described below
Specific embodiment restriction.
Injection moulding process described according to some embodiments of the invention and plastic parts are described referring to Fig. 3 to Fig. 5.
In first aspect present invention embodiment, as shown in Fig. 2 the invention provides a kind of injection moulding process, including：Step
104, by the cover half of mould and dynamic model matched moulds, hold out against insert and form product die cavity；Step 106, the injection raw material of scheduled volume is noted
In entering the die cavity of mould；Step 108, is the first predetermined injection moulding speed and injection pressure is the first predetermined pressure in injection moulding speed
During situation, the scheduled time of pressurize first；Step 110, is that the second predetermined injection moulding speed and injection pressure are second in injection moulding speed
During the situation of predetermined pressure, the scheduled time of pressurize second.
In this embodiment, as shown in figure 4, by carry out in the case of the first predetermined pressure one section of pressurize it is shorter when
Between, and the first predetermined pressure is less, and injection raw material 30 will not enter into the combination of mould in the case of the first predetermined pressure
In seam, through first scheduled time, the part near cavity wall 10 cools down in advance, defines crust 20, then pressure compared with
Pressurize is carried out under the second high predetermined pressure, even if the second predetermined pressure is very high, due to the injection raw material 30 at bonding crack
Cooling shaping, not further into in bonding crack, and the shell 20 for being formed can stop the knot that remaining injection raw material 30 is entered
In joint close, it is ensured that plastic parts will not produce after shaping burr, efficiently solve plastic parts and there is a problem of burr, improve
The presentation quality of plastic parts, more improves the satisfaction of client, makes product more conform to the requirement of client.
In one embodiment of the invention, it is preferable that as shown in figure 5, before step 104, injection moulding process also includes：
Step 100, mould is fixed on the injection machine matched with mould.
In this embodiment, by the way that mould is fixed on the injection machine matched with it, mould can be made in the mistake of injection
Cheng Zhong, will not produce burr because clamp force deficiency or pressure are excessive, improve the stability in injection moulding process.
In one embodiment of the invention, it is preferable that as shown in figure 5, after step 110, injection moulding process also includes：
Step 112, ejects by mould die sinking and by the product being molded by.
In this embodiment, product automatic ejection is effectively improved into production efficiency after mould die sinking；And avoid
Artificial pickup, reduces the operation of workman, reduces the labor intensity of workman.
In one embodiment of the invention, it is preferable that in step 106, the injection raw material of scheduled volume is by mould type
Chamber fills required injection raw material.
In this embodiment, the injection raw material by filling can die cavity is injected in die cavity so that the shell of formation is satisfied
Full zero defect, is effectively guaranteed the presentation quality of product.
In one embodiment of the invention, it is preferable that the first predetermined injection moulding speed is less than the second predetermined injection moulding speed；The
One predetermined pressure is less than the second predetermined pressure.
In this embodiment, by the way that the first predetermined injection moulding speed is set smaller than into the second predetermined injection moulding speed；First is pre-
Constant-pressure is set smaller than the second predetermined pressure so that in injection moulding process, first forms shell in the case of little pressure, then
Pressurize under big pressure, improves the density of workpiece and the intensity of workpiece itself.
In one embodiment of the invention, it is preferable that the first predetermined injection moulding speed is the maximum injection moulding speed of injection machine
10% to 20%.
In one embodiment of the invention, it is preferable that the first predetermined pressure is more than or equal to 5MPa, less than or equal to 25MPa.
In this embodiment, by by the first predetermined injection moulding speed be set to injection machine maximum injection moulding speed 10% to
20%, the first predetermined pressure is set to into 5MPa to 25MPa, the raw material that can be efficiently avoid in die cavity is entered in bonding crack
And form burr.
In one embodiment of the invention, it is preferable that first scheduled time was more than or equal to 0.5s, less than or equal to 2s.
In this embodiment, by the way that first scheduled time was set to into 0.5s to 2s, it is to avoid under low speed low pressure during pressurize
Between it is long and make the excessive sizing of plastic parts, the plastic parts density shaped in the case of low speed low pressure is low, intensity difference, and becomes
Type amount is big, so make plastic material solidify a shell in the short time in the case of low pressure low speed, then at a high speed
Continue to cool down under high pressure, be effectively guaranteed the mechanical property of plastic parts.
In one embodiment of the invention, it is preferable that the first predetermined injection moulding speed is the maximum injection moulding speed of injection machine
15%；First predetermined pressure is 10MPa；First scheduled time was 1s.
In this embodiment, plastic material can be made to solidify the appropriate shell of thin and thick, it is ensured that the plastic parts after molding is not
Burr can be produced, the presentation quality of plastic parts is effectively improved.
In one embodiment of the invention, it is preferable that the second predetermined injection moulding speed is the specified injection moulding speed of product；The
Two predetermined pressures are the specified injection pressure of product；Second scheduled time was the specified injection time of product.
In this embodiment, by the injection time that the pressurize under specified injection moulding speed and injection pressure is specified, effectively
Ensure that plastic parts density and cooling after deflection, make plastic parts not only have good presentation quality also have it is outstanding
Mechanical property.
In one embodiment of the invention, it is preferable that as shown in figure 5, before step 104, injection moulding process also includes：
Step 102, arranges the corresponding parameter of injection moulding process.
In this embodiment, by arranging corresponding parameter, effectively ensuring injection moulding process is smoothly carried out.
In second aspect present invention embodiment, the invention provides a kind of plastic parts, the plastic parts is by first aspect
Injection moulding process injection mo(u)lding described in any embodiment, therefore, the moulding possesses the note described in first aspect any embodiment
Whole beneficial effects of molding process.
The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (12)
1. a kind of injection moulding process, it is characterised in that include：
Step 104, by the cover half of mould and dynamic model matched moulds, holds out against insert and forms product die cavity；
Step 106, the injection raw material of scheduled volume is injected in the die cavity of the mould；
Step 108, when injection moulding speed is the first predetermined injection moulding speed and situation that injection pressure is the first predetermined pressure, pressurize
First scheduled time；
Step 110, when injection moulding speed is the second predetermined injection moulding speed and situation that injection pressure is the second predetermined pressure, pressurize
Second scheduled time.
2. injection moulding process according to claim 1, it is characterised in that before the step 104, described injection moulding process
Also include：Step 100, the mould is fixed on the injection machine matched with the mould.
3. injection moulding process according to claim 2, it is characterised in that after the step 110, described injection moulding process
Also include：Step 112, ejects by mould die sinking and by the product being molded by.
4. injection moulding process according to claim 3, it is characterised in that in the step 106, predetermined amount of injection
Raw material is that the mold cavity is filled into required injection raw material.
5. injection moulding process according to claim 1, it is characterised in that
The first predetermined injection moulding speed is less than the described second predetermined injection moulding speed；
First predetermined pressure is less than second predetermined pressure.
6. injection moulding process according to claim 5, it is characterised in that the first predetermined injection moulding speed is the injection machine
Maximum injection moulding speed 10% to 20%.
7. injection moulding process according to claim 5, it is characterised in that first predetermined pressure is more than or equal to 5MPa, little
In equal to 25MPa.
8. injection moulding process according to claim 1, it is characterised in that first scheduled time is more than or equal to 0.5s, little
In equal to 2s.
9. injection moulding process according to claim 5, it is characterised in that
The first predetermined injection moulding speed is the 15% of the maximum injection moulding speed of the injection machine；
First predetermined pressure is 10MPa；
First scheduled time is 1s.
10. injection moulding process according to any one of claim 1 to 9, it is characterised in that
The second predetermined injection moulding speed is the specified injection moulding speed of the product；
Second predetermined pressure is the specified injection pressure of the product；
Second scheduled time is the specified injection time of the product.
11. injection moulding process according to claim 10, it is characterised in that before step 104, described injection moulding process is also
Including：Step 102, arranges parameter corresponding with the injection moulding process.
12. a kind of plastic parts, it is characterised in that the plastic parts is by the injection as any one of claim 1 to 11
Method injection mo(u)lding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710016210.3A CN106671347A (en) | 2017-01-10 | 2017-01-10 | Injection molding method and plastic part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710016210.3A CN106671347A (en) | 2017-01-10 | 2017-01-10 | Injection molding method and plastic part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106671347A true CN106671347A (en) | 2017-05-17 |
Family
ID=58850515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710016210.3A Pending CN106671347A (en) | 2017-01-10 | 2017-01-10 | Injection molding method and plastic part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106671347A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107746520A (en) * | 2017-10-24 | 2018-03-02 | 常熟利星光电科技有限公司 | A kind of PVC injection materials and a kind of PVC injection moulding process that bloom mirror effect can be formed in product surface |
| CN114516137A (en) * | 2020-11-19 | 2022-05-20 | 美的集团股份有限公司 | Design method of injection mold, injection molding method and injection mold |
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| CN101439575A (en) * | 2008-12-26 | 2009-05-27 | 北京东明兴业科技有限公司 | Injection molding process of thin wall plastic products |
| CN102407588A (en) * | 2010-09-25 | 2012-04-11 | 上海浦东美灵塑料制品有限公司 | Injection molding technology for acrylonitrile butadiene styrene (ABS) plastic air conditioner shell |
| CN105666780A (en) * | 2016-03-11 | 2016-06-15 | 滁州市博康模具塑料有限公司 | High-glossiness injection molding process |
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2017
- 2017-01-10 CN CN201710016210.3A patent/CN106671347A/en active Pending
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| CN101439575A (en) * | 2008-12-26 | 2009-05-27 | 北京东明兴业科技有限公司 | Injection molding process of thin wall plastic products |
| CN102407588A (en) * | 2010-09-25 | 2012-04-11 | 上海浦东美灵塑料制品有限公司 | Injection molding technology for acrylonitrile butadiene styrene (ABS) plastic air conditioner shell |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107746520A (en) * | 2017-10-24 | 2018-03-02 | 常熟利星光电科技有限公司 | A kind of PVC injection materials and a kind of PVC injection moulding process that bloom mirror effect can be formed in product surface |
| CN114516137A (en) * | 2020-11-19 | 2022-05-20 | 美的集团股份有限公司 | Design method of injection mold, injection molding method and injection mold |
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