CN107891585A - Prevent the method and mould structure of trapped gas at the lamp hole of product in BMC moulds - Google Patents

Prevent the method and mould structure of trapped gas at the lamp hole of product in BMC moulds Download PDF

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Publication number
CN107891585A
CN107891585A CN201711236869.6A CN201711236869A CN107891585A CN 107891585 A CN107891585 A CN 107891585A CN 201711236869 A CN201711236869 A CN 201711236869A CN 107891585 A CN107891585 A CN 107891585A
Authority
CN
China
Prior art keywords
product
bmc
lamp hole
hole
trapped gas
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.)
Pending
Application number
CN201711236869.6A
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Chinese (zh)
Inventor
刘俊麟
苗蓓蕾
李明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hasco Vision Technology Co Ltd
Original Assignee
Shanghai Koito Automotive Lamp Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shanghai Koito Automotive Lamp Co Ltd filed Critical Shanghai Koito Automotive Lamp Co Ltd
Priority to CN201711236869.6A priority Critical patent/CN107891585A/en
Publication of CN107891585A publication Critical patent/CN107891585A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/26Moulds
    • B29C45/34Moulds having venting means

Abstract

The invention discloses a kind of method and mould structure for preventing trapped gas at the lamp hole of product in BMC moulds, belong to injection mold field.First, a kind of method for preventing trapped gas at the lamp hole of product in BMC moulds is disclosed, the exhaust passage of the position increase connection BMC mold exteriors of the lamp hole of corresponding product in the cover half of the BMC moulds.Secondly, a kind of to prevent in BMC moulds trapped gas mould structure at the lamp hole of product, the position of the lamp hole of corresponding product is provided with the exhaust passage for connecting the BMC mold exteriors in the cover half of the BMC moulds.The present invention in the cover half of BMC moulds by setting exhaust passage, so that BMC moulds, in mold-closing injection, the air extractor of injection machine is evacuated to exhaust passage, accelerates the shaping of product, the gap that the air of product injection end coordinates with insert is discharged, improves product quality.

Description

Prevent the method and mould structure of trapped gas at the lamp hole of product in BMC moulds
Technical field
The present invention relates to injection mold field, more particularly to a kind of side for preventing trapped gas at the lamp hole of product in BMC moulds Method and mould structure.
Background technology
BMC is Bulk molding compounds abbreviation, i.e. BMC, and the country is commonly referred to as unsaturated poly- Ester bulk the modern designs of plastics, there is good physical property, electrical property and mechanical property.BMC injection moulds and common thermoplasticity, thermosetting The injection of property is somewhat different, and mainly BMC shrinkage factor is relatively low, and the one of only dry point.
Because BMC BMCs have excellent electric property, mechanical performance, heat resistance, chemical resistance, adapt to again Various moulding process, you can meet requirement of the various products to performance, therefore increasingly liked by users.
In auto industry field, BMC is also widely used, such as the large component such as vehicle light reflector, hood, rear car Door, electrocaloric effect, bonnet, horn box, big lamp housing and distributor rotor etc..Now, these made of BMC products be typically all by BMC auto feeds are molded.But in injection moulding process, the lamp hole of the existing position product of BMC moulds in injection often Produce pinprick, trapped gas phenomenon.
The content of the invention
The technical problem to be solved in the present invention is to overcome the lamp hole of product in BMC moulds in the prior art in injection A kind of phenomena such as often producing pinprick, trapped gas, there is provided method and mould for preventing trapped gas at the lamp hole of product in BMC moulds Structure, exhaust effect when improving injection at the lamp hole of product, to improve product quality.
The object of the present invention is achieved like this:
A kind of method for preventing trapped gas at the lamp hole of product in BMC moulds, the corresponding product in the cover half of the BMC moulds The position increase of lamp hole connect the exhaust passages of the BMC mold exteriors.
Wherein, the exhaust passage includes being located at the blast pipe in model frame with ft connection, the edge in fixed die insert The exhaust clearance ring that the circumference of the lamp hole of product is set, and connected in fixed die insert between the blast pipe and the exhaust The air discharge duct of gap ring.
Wherein, the edge between plug of the exhaust clearance ring by plug hole and in plug hole is formed with gap, institute State lamp hole and air discharge duct that plug hole connects the product.
A kind of mould structure for preventing trapped gas at the lamp hole of product in BMC moulds, it is corresponding in the cover half of the BMC moulds The position of the lamp hole of product is provided with the exhaust passage for connecting the BMC mold exteriors.
Wherein, the exhaust passage includes being located at the blast pipe in model frame with ft connection, the edge in fixed die insert The exhaust clearance ring that the circumference of the lamp hole of product is set, and connected in fixed die insert between the blast pipe and the exhaust The air discharge duct of gap ring.
Wherein, the edge between plug of the exhaust clearance ring by plug hole and in plug hole is formed with gap, institute State lamp hole and air discharge duct that plug hole connects the product.
Wherein, at right angles connected between the blast pipe and air discharge duct.
Wherein, at right angles connected between the exhaust clearance ring and air discharge duct.
Wherein, the air discharge duct is arranged at the interface of the fixed die insert and the model frame.
Wherein, the top in the plug hole abuts the fixed die insert and the interface of the model frame, and the plug is certainly It is inserted at the top of plug hole in the plug hole.
Beneficial effects of the present invention are:The present invention in the cover half of BMC moulds by setting exhaust passage so that BMC moulds In mold-closing injection, the air extractor of injection machine is evacuated tool to exhaust passage, accelerates the shaping of product, and product is molded into end The gap that air coordinates with insert is discharged, and improves product quality.
Brief description of the drawings
Fig. 1 is the knot of the mould structure embodiment one of the present invention for preventing trapped gas at the lamp hole of product in BMC moulds Structure schematic diagram.
Fig. 2 is the knot of the mould structure embodiment two of the present invention for preventing trapped gas at the lamp hole of product in BMC moulds Structure schematic diagram.
Fig. 3 is the local structural graph of the lamp housing formed by heretofore described BMC mold injections.
Embodiment
The present invention is further illustrated below by the mode of embodiment, but does not therefore limit the present invention to described reality Apply among a scope.
First, the invention provides a kind of method for preventing trapped gas at the lamp hole of product in BMC moulds.
The method for preventing trapped gas at the lamp hole of product in BMC moulds is specifically, right in the cover half of the BMC moulds Answering the position of the lamp hole of product increases the exhaust passage for connecting the BMC mold exteriors.
Specifically, the exhaust passage includes being located at the blast pipe in model frame with ft connection, in fixed die insert The exhaust clearance ring set along the circumference of the lamp hole of product, and the blast pipe and the exhaust are connected in fixed die insert The air discharge duct of spacer ring.
More specifically, the edge between plug of the exhaust clearance ring by plug hole and in plug hole matches somebody with somebody gap structure Into the plug hole connects the lamp hole and air discharge duct of the product.
Secondly, the invention provides a kind of mould structure for preventing trapped gas at the lamp hole of product in BMC moulds.
In embodiment one, as shown in fig.1, the mould structure for preventing trapped gas at the lamp hole of product in BMC moulds Including:The position of the lamp hole 5 of corresponding product 2 is provided with the row for connecting the BMC mold exteriors in the cover half of the BMC moulds Gas passage 3.
In the present embodiment, by setting exhaust passage in the cover half of BMC moulds so that BMC moulds in mold-closing injection, The air extractor of injection machine is evacuated to exhaust passage, accelerates the shaping of product, and product is molded into the air of end as insert is matched somebody with somebody The gap discharge of conjunction, to solve the problems, such as trapped gas at the lamp hole of product.
In embodiment two, as shown in fig.2, the mould structure for preventing trapped gas at the lamp hole of product in BMC moulds On the basis of previous embodiment one, the concrete structure of the exhaust passage 3 is disclosed, the exhaust passage 3 is included positioned at fixed With the blast pipe 31 of ft connection in framed 4, the exhaust clearance set in fixed die insert 1 along the circumference of the lamp hole 5 of product 2 Ring 33, and connect in fixed die insert the air discharge duct 32 of the blast pipe 31 and the exhaust clearance ring 33.The exhaust Edge between plug 331 of the spacer ring 33 by plug hole 332 and in plug hole 332 is formed with gap, the plug hole 332 Connect the lamp hole 5 and air discharge duct 32 of the product 2.At right angles connected between the blast pipe 31 and air discharge duct 32.The exhaust At right angles connected between spacer ring 33 and air discharge duct 32.The air discharge duct 32 is arranged at the fixed die insert 1 and the model frame 4 Interface.
In embodiment three, the mould structure for preventing trapped gas at the lamp hole of product in BMC moulds is in previous embodiment On the basis of two, the mounting structure of plug is further disclosed, the plug is inserted into the plug hole from the top of plug hole In, the top in the plug hole abuts the fixed die insert and the interface of the model frame.
Although the embodiment of the present invention is the foregoing described, it will be appreciated by those of skill in the art that this is only For example, protection scope of the present invention is to be defined by the appended claims.Those skilled in the art without departing substantially from On the premise of the principle and essence of the present invention, various changes or modifications can be made to these embodiments, but these changes and Modification each falls within protection scope of the present invention.

Claims (10)

  1. A kind of 1. method for preventing trapped gas at the lamp hole of product in BMC moulds, it is characterised in that in the cover half of the BMC moulds The position increase of the lamp hole of middle corresponding product connects the exhaust passage of the BMC mold exteriors.
  2. A kind of 2. method for preventing trapped gas at the lamp hole of product in BMC moulds according to claim 1, it is characterised in that The exhaust passage includes being located at blast pipe with ft connection in model frame, in fixed die insert along product lamp hole circle The exhaust clearance ring that week is set, and connect in fixed die insert the air discharge duct of the blast pipe and the exhaust clearance ring.
  3. A kind of 3. method for preventing trapped gas at the lamp hole of product in BMC moulds according to claim 2, it is characterised in that Edge between plug of the exhaust clearance ring by plug hole and in plug hole is formed with gap, and the plug hole connects institute State the lamp hole and air discharge duct of product.
  4. 4. a kind of mould structure for preventing trapped gas at the lamp hole of product in BMC moulds, it is characterised in that in the BMC moulds The position of the lamp hole of corresponding product is provided with the exhaust passage for connecting the BMC mold exteriors in cover half.
  5. 5. a kind of mould structure for preventing trapped gas at the lamp hole of product in BMC moulds according to claim 4, its feature exist In the exhaust passage includes being located at the blast pipe in model frame with ft connection, along the lamp hole of product in fixed die insert The exhaust clearance ring that sets of circumference, and connect in fixed die insert the exhaust of the blast pipe and the exhaust clearance ring Groove.
  6. 6. a kind of mould structure for preventing trapped gas at the lamp hole of product in BMC moulds according to claim 5, its feature exist In the edge between plug of the exhaust clearance ring by plug hole and in plug hole is formed with gap, and the plug hole connects Lead to the lamp hole and air discharge duct of the product.
  7. 7. a kind of mould structure for preventing trapped gas at the lamp hole of product in BMC moulds according to claim 5, its feature exist In at right angles being connected between the blast pipe and air discharge duct.
  8. 8. a kind of mould structure for preventing trapped gas at the lamp hole of product in BMC moulds according to claim 5, its feature exist In at right angles being connected between the exhaust clearance ring and air discharge duct.
  9. 9. a kind of mould structure for preventing trapped gas at the lamp hole of product in BMC moulds according to claim 5, its feature exist In the air discharge duct is arranged at the interface of the fixed die insert and the model frame.
  10. 10. a kind of mould structure for preventing trapped gas at the lamp hole of product in BMC moulds according to claim 9, its feature It is, the top in the plug hole abuts the fixed die insert and the interface of the model frame, and the plug is from plug hole Top is inserted into the plug hole.
CN201711236869.6A 2017-11-30 2017-11-30 Prevent the method and mould structure of trapped gas at the lamp hole of product in BMC moulds Pending CN107891585A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711236869.6A CN107891585A (en) 2017-11-30 2017-11-30 Prevent the method and mould structure of trapped gas at the lamp hole of product in BMC moulds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711236869.6A CN107891585A (en) 2017-11-30 2017-11-30 Prevent the method and mould structure of trapped gas at the lamp hole of product in BMC moulds

Publications (1)

Publication Number Publication Date
CN107891585A true CN107891585A (en) 2018-04-10

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CN201711236869.6A Pending CN107891585A (en) 2017-11-30 2017-11-30 Prevent the method and mould structure of trapped gas at the lamp hole of product in BMC moulds

Country Status (1)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5567430A (en) * 1978-11-16 1980-05-21 Matsushita Electric Works Ltd Metal mold for injection molding
JP2003320562A (en) * 2002-02-27 2003-11-11 Mitsuboshi Belting Ltd Injection molding equipment
CN201776886U (en) * 2010-09-15 2011-03-30 宁海瑞元模塑有限公司 Injection mold core with suction-exhaust and quick-cooling functional structure
CN102490289A (en) * 2011-11-30 2012-06-13 中山市利群精密实业有限公司 Venting auxiliary structure for plastic mould
CN203680747U (en) * 2014-02-27 2014-07-02 许丹 Insert structure for plastic injection mold
CN207841975U (en) * 2017-11-30 2018-09-11 华域视觉科技(上海)有限公司 Prevent the mould structure of trapped gas at the lamp hole of product in BMC molds

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5567430A (en) * 1978-11-16 1980-05-21 Matsushita Electric Works Ltd Metal mold for injection molding
JP2003320562A (en) * 2002-02-27 2003-11-11 Mitsuboshi Belting Ltd Injection molding equipment
CN201776886U (en) * 2010-09-15 2011-03-30 宁海瑞元模塑有限公司 Injection mold core with suction-exhaust and quick-cooling functional structure
CN102490289A (en) * 2011-11-30 2012-06-13 中山市利群精密实业有限公司 Venting auxiliary structure for plastic mould
CN203680747U (en) * 2014-02-27 2014-07-02 许丹 Insert structure for plastic injection mold
CN207841975U (en) * 2017-11-30 2018-09-11 华域视觉科技(上海)有限公司 Prevent the mould structure of trapped gas at the lamp hole of product in BMC molds

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CB02 Change of applicant information

Address after: 201821 No. 767, Yecheng Road, Shanghai, Jiading District

Applicant after: HUAYU VISION TECHNOLOGY (SHANGHAI) Co.,Ltd.

Address before: 201821 No. 767, Yecheng Road, Shanghai, Jiading District

Applicant before: SHANGHAI KOITO AUTOMOTIVE LAMP Co.,Ltd.

CB02 Change of applicant information