CN107053626B - A kind of bumper shock absorber support fretting map Shooting Technique - Google Patents

A kind of bumper shock absorber support fretting map Shooting Technique Download PDF

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Publication number
CN107053626B
CN107053626B CN201710265298.2A CN201710265298A CN107053626B CN 107053626 B CN107053626 B CN 107053626B CN 201710265298 A CN201710265298 A CN 201710265298A CN 107053626 B CN107053626 B CN 107053626B
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China
Prior art keywords
injection
injection molding
molding machine
raw material
mixed liquor
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CN201710265298.2A
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Chinese (zh)
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CN107053626A (en
Inventor
璧靛博
赵岩
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Changchun Hengxing Group Co Ltd
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Changchun Hengxing Group Co Ltd
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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
    • B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of 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
    • 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
    • B29C45/77—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
    • B29C2945/76595—Velocity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof

Abstract

The invention discloses a kind of bumper shock absorber support fretting map Shooting Techniques, comprising the following steps: a: configuration raw material: suitable sodium bicarbonate and citric acid being added in PP/PE granular materials；B: heating and melting is carried out to raw material: configured raw material in the step a is put into the charging basket of injection molding machine, raw material enters heater through injection molding machine charging basket, under the shear action of screw in injection molding machine, PP/PE particle and the sodium bicarbonate and the citric acid occur it is micro- react, make occur bubble inside the PP/PE of molten condition；C: addition nucleating agent: suitable nucleating agent is added in the step b in the PP/PE mixed liquor of molten condition, is evenly mixed in generated bubble in the step b in PP/PE mixed liquor.Beneficial effect is: by adding various ingredients, so that material internal is formed the microbubble of even inflation, and the rapid crystallization in molding improves production efficiency to reduce molding cycle, and mitigates the weight of product significantly.

Description

A kind of bumper shock absorber support fretting map Shooting Technique
Technical field
The present invention relates to automobile parts manufacture fields, and in particular to a kind of bumper shock absorber support fretting map injection molding Technique.
Background technique
Bumper damper bottom bracket is formed by plastic injection, and tradition uses common PP+E/P-TD20 (board Number P3GM04J-35BK, material standard TSM5608G-6) material is molded, because product wall thickness is thicker after injection molding, lead to material In a short time can not complete cooled and solidified, long so as to cause life cycle of the product, production efficiency is low, and such material injection at When type, because shrinking percentage of material when completely not cooling is larger, cause the dwell time long, product weight weight.
Summary of the invention
The object of the invention is that in order to solve the problems, such as that shock absorber support generation exists in background technique, provides one kind Bumper shock absorber support fretting map Shooting Technique.
The present invention through the following technical solutions to achieve the above objectives:
A kind of bumper shock absorber support fretting map Shooting Technique, comprising the following steps:
A: configuration raw material: suitable sodium bicarbonate and citric acid are added in PP/PE granular materials；
B: heating and melting is carried out to raw material: configured raw material in the step a being put into the charging basket of injection molding machine, raw material Enter heater through injection molding machine charging basket, under the shear action of screw in injection molding machine, PP/PE particle and the sodium bicarbonate and described Micro- reaction occurs for citric acid, makes occur bubble inside the PP/PE of molten condition；
C: addition nucleating agent: suitable nucleating agent is added in the step b in the PP/PE mixed liquor of molten condition, is made Generated bubble is evenly mixed in PP/PE mixed liquor in the step b；
D: addition lubricant: suitable lubricant is added in the mixed liquor of the step c before injection molding；
E: setting injection parameters: the injection pressure of injection molding machine is promoted 10%, injection speed promotes 35%；
F: storing: the step d be formed by mixed solution through injection molding machine spiral conveying tube be sent into injection-moulding nozzle at into Row storing；
G: injection mold is preheated: injection mold is heated to 80 DEG C；
H: injection molding: after the step f storing is completed, while the mold in the step g is heated to set temperature, note is opened The introduction valve of molding machine is injected into the mixed liquor of the step d in the type chamber of mold through injection-moulding nozzle；
I: pressure maintaining, cooling: pressure maintaining is carried out to the mixed liquor for the step d being injected into mold cavity, keeps it slowly cold But；
K: after the completion of the step i pressure maintaining, taking-up workpiece can die sinking: be opened.
In the present embodiment, the sodium bicarbonate dosage added in the step a is 5%-8%, the lemon of addition The dosage of acid is 5%-10%.
In the present embodiment, the heating temperature melted in the step b to raw material is 280 DEG C.
In the present embodiment, the nucleating agent added in the step c is foam stabiliser, and main component is polyalcohol Any one of class, sulfonated aliphatic alcohol, alpha-sulfonated fatty acid, and additive capacity is 0.5%-2.5%.
In the present embodiment, the lubricant added in the step d is silicone powder or polyethylene wax, wherein is used Additive capacity when silicone powder is 0.5%-2%, and additive capacity when using polyethylene wax is 2%-4%.
In the present embodiment, the injection pressure of injection molding machine is 90-100MPa, injection speed 24- in the step e 27cm/s。
In the present embodiment, unidirectional spring needle is installed at the nozzle of injection molding machine used in the step f.
In the present embodiment, the pressure maintaining in the step i uses constant pressure pressure maintaining, and dwell pressure is the 60MPa of injection pressure, Dwell time is 3min.
Beneficial effect is: by adding various ingredients, so that material internal is formed the microbubble of even inflation, and forming Middle rapid crystallization improves production efficiency to reduce molding cycle, and mitigates the weight of product significantly.
Specific embodiment
The invention will be further described below:
A kind of bumper shock absorber support fretting map Shooting Technique, comprising the following steps:
A: configuration raw material: suitable sodium bicarbonate and citric acid are added in PP/PE granular materials；
B: heating and melting is carried out to raw material: configured raw material in the step a being put into the charging basket of injection molding machine, raw material Enter heater through injection molding machine charging basket, under the shear action of screw in injection molding machine, PP/PE particle and the sodium bicarbonate and described Micro- reaction occurs for citric acid, makes occur bubble inside the PP/PE of molten condition；
C: addition nucleating agent: suitable nucleating agent is added in the step b in the PP/PE mixed liquor of molten condition, is made Generated bubble is evenly mixed in PP/PE mixed liquor in the step b；
D: addition lubricant: suitable lubricant is added in the mixed liquor of the step c before injection molding；
E: setting injection parameters: the injection pressure of injection molding machine is promoted 10%, injection speed promotes 35%；
F: storing: the step d be formed by mixed solution through injection molding machine spiral conveying tube be sent into injection-moulding nozzle at into Row storing；
G: injection mold is preheated: injection mold is heated to 80 DEG C；
H: injection molding: after the step f storing is completed, while the mold in the step g is heated to set temperature, note is opened The introduction valve of molding machine is injected into the mixed liquor of the step d in the type chamber of mold through injection-moulding nozzle；
I: pressure maintaining, cooling: pressure maintaining is carried out to the mixed liquor for the step d being injected into mold cavity, keeps it slowly cold But；
K: after the completion of the step i pressure maintaining, taking-up workpiece can die sinking: be opened.
In the present embodiment, the sodium bicarbonate dosage added in the step a is 5%-8%, the lemon of addition The dosage of acid is 5%-10%, and the sodium bicarbonate is used to make the PP/PE liquid internal of molten condition to generate bubble, the citric acid Plasticizer when as PP/PE injection molding, makes PP/PE plastics rapid crystallization, while making shock absorber support toughness after molding and resisting Impact force enhancing, to improve the shock resistance of bracket.
In the present embodiment, the heating temperature melted in the step b to raw material is 280 DEG C.
In the present embodiment, the nucleating agent added in the step c is foam stabiliser, and main component is polyalcohol Any one of class, sulfonated aliphatic alcohol, alpha-sulfonated fatty acid, and additive capacity be 0.5%-2.5%, the nucleating agent for reducing The surface tension of PP/PE mixing liquid, being allowed to, which can produce a large amount of minute bubbles and control minute bubbles, is uniformly distributed, and is automatically repaired abscess The weakness of wall is allowed to not brokenly bubble, makes bubble as one of bracket injection molding rock-steady structure, can not only reduce bracket Total weight, while the molding time of bracket can be reduced.
In the present embodiment, the lubricant added in the step d is silicone powder or polyethylene wax, wherein is used Additive capacity when silicone powder is 0.5%-2%, and additive capacity when using polyethylene wax is 2%-4%, and the lubricant is for mentioning The mobility of high PP/PE mixed liquor.
In the present embodiment, the injection pressure of injection molding machine is 90-100MPa, injection speed 24- in the step e 27cm/s。
In the present embodiment, unidirectional spring needle is installed at the nozzle of injection molding machine used in the step f.
In the present embodiment, the pressure maintaining in the step i uses constant pressure pressure maintaining, and dwell pressure is the 60MPa of injection pressure, Dwell time is 3min.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appending claims and equivalents circle It is fixed.

Claims (1)

1. a kind of bumper shock absorber support fretting map injection moulding process, it is characterised in that: the following steps are included:
A: configuration raw material: suitable sodium bicarbonate and citric acid are added in PP/PE granular materials；
The sodium bicarbonate dosage of addition is 5%-8%, and the dosage of the citric acid of addition is 5%-10%；
B: heating and melting is carried out to raw material: configured raw material in the step a being put into the charging basket of injection molding machine, raw material is through infusing Molding machine charging basket enters heater, under the shear action of screw in injection molding machine, PP/PE particle and the sodium bicarbonate and the lemon Micro- reaction occurs for acid, makes occur bubble inside the PP/PE of molten condition；
The heating temperature melted to raw material is 280 DEG C；
C: addition nucleating agent: suitable nucleating agent is added in the step b in the PP/PE mixed liquor of molten condition, is made described Generated bubble is evenly mixed in PP/PE mixed liquor in step b；
The nucleating agent of addition is foam stabiliser, and main component is polyalcohols, in sulfonated aliphatic alcohol, alpha-sulfonated fatty acid It is any, and additive capacity is 0.5%-2.5%；
D: addition lubricant: suitable lubricant is added in the mixed liquor of the step c before injection molding；
The lubricant of addition is silicone powder or polyethylene wax, wherein additive capacity when using silicone powder is 0.5%-2%, Additive capacity when using polyethylene wax is 2%-4%；
E: setting injection parameters: the injection pressure of injection molding machine is promoted 10%, injection speed promotes 35%；
The injection pressure of injection molding machine is 90-100MPa, injection speed 24-27cm/s；
F: storing: the step d is formed by mixed solution through being stored up at the spiral conveying tube feeding injection-moulding nozzle of injection molding machine Material；
Unidirectional spring needle is installed at the nozzle of used injection molding machine；
G: injection mold is preheated: injection mold is heated to 80 DEG C；
H: injection molding: after the step f storing is completed, while the mold in the step g is heated to set temperature, injection molding machine is opened Introduction valve, be injected into the mixed liquor of the step d in the type chamber of mold through injection-moulding nozzle；
I: pressure maintaining, cooling: pressure maintaining is carried out to the mixed liquor for the step d being injected into mold cavity, makes its Slow cooling；
Pressure maintaining uses constant pressure pressure maintaining, and dwell pressure is the 60MPa, dwell time 3min of injection pressure；
K: after the completion of the step i pressure maintaining, taking-up workpiece can die sinking: be opened.
CN201710265298.2A 2017-04-21 2017-04-21 A kind of bumper shock absorber support fretting map Shooting Technique Active CN107053626B (en)

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CN201710265298.2A CN107053626B (en) 2017-04-21 2017-04-21 A kind of bumper shock absorber support fretting map Shooting Technique

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Application Number Priority Date Filing Date Title
CN201710265298.2A CN107053626B (en) 2017-04-21 2017-04-21 A kind of bumper shock absorber support fretting map Shooting Technique

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CN107053626B true CN107053626B (en) 2019-05-28

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CN110696267A (en) * 2019-10-22 2020-01-17 苏州兆如电子有限公司 Foaming injection molding method of television bracket
CN114010617B (en) * 2021-12-21 2023-03-24 新昌辽远科技有限公司 Hydroxypropyl starch empty capsule and preparation method thereof

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JP4465929B2 (en) * 2001-07-05 2010-05-26 株式会社プライムポリマー Method for producing foam of thermoplastic resin composition

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