CN108655367B - Vacuum casting process of PU (polyurethane) foaming mold with exhaust groove - Google Patents
Vacuum casting process of PU (polyurethane) foaming mold with exhaust groove Download PDFInfo
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- CN108655367B CN108655367B CN201810579554.XA CN201810579554A CN108655367B CN 108655367 B CN108655367 B CN 108655367B CN 201810579554 A CN201810579554 A CN 201810579554A CN 108655367 B CN108655367 B CN 108655367B
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- exhaust groove
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/06—Vacuum casting, i.e. making use of vacuum to fill the mould
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- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
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Abstract
The invention relates to the technical field of foaming molds, and particularly discloses a vacuum casting process of a PU foaming mold with an exhaust duct, which comprises the following steps: s1, processing an exhaust groove on the model, and processing a demoulding inclination; s2, processing a vacuum hole at the bottom of the model exhaust groove; s3, casting and molding the exhaust groove together with the mold; and S4, opening the mould to obtain the foaming mould with the exhaust groove. The mould with the exhaust groove cast by the casting process effectively keeps the air which cannot be exhausted in the exhaust groove, ensures the foaming shape of the product, processes the exhaust groove with the demoulding inclination on the model, and then adopts the vacuum casting mode to cast and mold the exhaust groove and the mould together, thereby avoiding the phenomena that the casting processing takes time and sand holes are easy to appear, and saving the manufacturing time and cost; the demoulding inclination is set during processing to facilitate demoulding.
Description
Technical Field
The invention belongs to the technical field of foaming molds, and particularly relates to a vacuum casting process of a PU foaming mold with an exhaust groove.
Background
Along with the consumption in the market behind the car articles for use of china continues to increase, PU foaming mould has extremely extensive application in automotive interior article field, so the requirement for quality to PU foaming mould is higher and higher, current PU foaming mould all can be equipped with the air discharge duct on the die joint of die cavity mould for the gas in the discharge die cavity mould, the manufacturing of air discharge duct on the die joint all adopts to process on PU foaming mould and obtains among the prior art, it is more time-consuming, hard to process the air discharge duct on the die joint, and also there is very big loss to processing equipment. Therefore, it is desirable to improve the manufacturing method of the exhaust groove to reduce the time and labor consumption of the exhaust groove.
Disclosure of Invention
The invention aims to provide a vacuum casting process of a PU foaming mould with an exhaust groove.
In order to solve the technical problem, the invention provides a vacuum casting process of a PU foaming mold with an exhaust groove, which comprises the following specific steps:
s1, processing an exhaust groove on the model, and processing a demoulding inclination;
s2, processing a vacuum hole at the bottom of the model exhaust groove;
s3, casting and molding the exhaust groove together with the mold;
and S4, opening the mould to obtain the foaming mould with the exhaust groove.
Furthermore, the exhaust groove in the step S1 is a U-shaped exhaust groove, and the exhaust groove is machined and formed by a numerical control machining device.
Specifically, the depth of the U-shaped exhaust groove is 3-4mm, the bottom fillet is R3, and the demoulding inclination is 2-5 degrees.
Further, the numerical control processing equipment is a numerical control machine tool and a ball cutter with the diameter of 3 mm.
Further, the size of the vacuum holes in S2 is phi 0.8-phi 1mm, the number of the vacuum holes is several, and the distance between every two vacuum holes is 10-15 mm.
Specifically, in S3, the exhaust groove and the mold are cast by a vacuum casting process.
The invention has the beneficial effects that: the mould with the exhaust groove cast by the casting process effectively keeps the air which cannot be exhausted in the exhaust groove, ensures the foaming shape of the product, processes the exhaust groove with the demoulding inclination on the model, and then adopts the vacuum casting mode to cast and mold the exhaust groove and the mould together, thereby avoiding the phenomena that the casting processing takes time and sand holes are easy to appear, and saving the manufacturing time and cost; the demoulding inclination is set during processing to facilitate demoulding.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a casting process flow diagram of the present invention;
FIG. 2 is a schematic view of the U-shaped vent slot of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In one embodiment of the present invention, as shown in fig. 1 to 2, a vacuum casting process of a PU foam mold with an exhaust groove is specifically disclosed, which specifically comprises the following steps:
s1, processing an exhaust groove on the model, and processing a demoulding inclination; the exhaust groove is a U-shaped exhaust groove, a numerically-controlled machine tool and a ball cutter with the diameter of 3mm are machined and molded during machining, the depth of the U-shaped exhaust groove is 3-4mm, the bottom fillet is R3, and the demolding inclination is 2-5 degrees.
S2, processing vacuum holes at the bottom of the model exhaust groove, wherein the vacuum holes are used for adsorbing a plastic film on the model during sand casting and vacuum pumping, the size of the vacuum holes is phi 0.8-phi 1mm, the number of the vacuum holes is a plurality, the number of the vacuum holes is determined according to the length of the exhaust groove, and the distance between every two vacuum holes is 10-15 mm;
s3, casting and molding the exhaust groove together with the mold by adopting a vacuum casting process, wherein the mold is placed into a sand box and fixed during casting, a preheated plastic film is placed on the mold, the mold is vacuumized, the bottom of the exhaust groove on the mold is provided with a vacuum hole, the plastic film is adsorbed on the mold, molding sand is poured into the mold and the sand box is vibrated, the sand box is vacuumized, and the exhaust groove is formed by sand casting;
and S4, opening the mould to obtain the foaming mould with the exhaust groove.
The invention has the beneficial effects that: the mould with the exhaust groove cast by the casting process effectively keeps the air which cannot be exhausted in the exhaust groove, ensures the foaming shape of the product, processes the exhaust groove with the demoulding inclination on the model, and then adopts the vacuum casting mode to cast and mold the exhaust groove and the mould together, thereby avoiding the phenomena that the casting processing takes time and sand holes are easy to appear, and saving the manufacturing time and cost; the demoulding inclination is set during processing to facilitate demoulding.
The above disclosure is only one preferred embodiment of the present invention, and certainly should not be construed as limiting the scope of the invention, which is defined by the claims and their equivalents.
Claims (1)
1. A vacuum casting process of a PU foaming mould with an exhaust groove is characterized in that,
the method comprises the following specific steps:
s1, processing an exhaust groove on the model, and processing a demoulding inclination; the exhaust groove is a U-shaped row
The air groove is machined and formed by a numerical control machine tool and a ball cutter with the diameter of 3mm, and the U shape is
The depth of the exhaust groove is 3-4mm, the bottom fillet is R3, and the demoulding inclination is 2-5 degrees;
s2, processing vacuum holes at the bottom of the model exhaust groove, wherein the vacuum holes are used for founding and vacuumizing
When the vacuum is empty, the plastic film is absorbed on the model, the size of the vacuum hole is phi 0.8-phi 1mm,
the number of the vacuum holes is several, the number of the vacuum holes is determined according to the length of the exhaust groove, and every two vacuum holes
The distance between the two is 10-15 mm;
s3, casting and molding the exhaust groove together with the PU foaming mould by adopting a vacuum casting process,
when casting, the model is put into a sand box and fixed, and a layer of preheated plastic film is put on the sand box, so that the model
The vacuum hole is arranged at the bottom of the exhaust groove on the vacuumized model, and the plastic film is adsorbed to the model
Pouring molding sand and vibrating the sand box, vacuumizing the sand box, and foaming the PU with the exhaust groove
Molding by sand casting;
and S4, opening the die to obtain the PU foaming die with the exhaust groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810579554.XA CN108655367B (en) | 2018-06-07 | 2018-06-07 | Vacuum casting process of PU (polyurethane) foaming mold with exhaust groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810579554.XA CN108655367B (en) | 2018-06-07 | 2018-06-07 | Vacuum casting process of PU (polyurethane) foaming mold with exhaust groove |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108655367A CN108655367A (en) | 2018-10-16 |
| CN108655367B true CN108655367B (en) | 2021-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810579554.XA Active CN108655367B (en) | 2018-06-07 | 2018-06-07 | Vacuum casting process of PU (polyurethane) foaming mold with exhaust groove |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201921976U (en) * | 2010-12-16 | 2011-08-10 | 山东蒙凌工程机械股份有限公司 | Special template for vacuum casting |
| CN102527935A (en) * | 2012-03-19 | 2012-07-04 | 南通超达机械科技有限公司 | Precision vacuum-casting method for foaming-mould aluminum casting |
| CN103586412A (en) * | 2013-11-11 | 2014-02-19 | 冀中能源邯郸矿业集团通方煤矿机械有限公司 | Method for casting ledges of middle troughs of scraper conveyer by V (vacuum) method |
| CN204194714U (en) * | 2014-08-18 | 2015-03-11 | 成都新同高复合器材有限公司 | V method casting molds |
| CN204997002U (en) * | 2015-08-12 | 2016-01-27 | 江苏双星特钢有限公司 | V method casting device of welt |
-
2018
- 2018-06-07 CN CN201810579554.XA patent/CN108655367B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201921976U (en) * | 2010-12-16 | 2011-08-10 | 山东蒙凌工程机械股份有限公司 | Special template for vacuum casting |
| CN102527935A (en) * | 2012-03-19 | 2012-07-04 | 南通超达机械科技有限公司 | Precision vacuum-casting method for foaming-mould aluminum casting |
| CN103586412A (en) * | 2013-11-11 | 2014-02-19 | 冀中能源邯郸矿业集团通方煤矿机械有限公司 | Method for casting ledges of middle troughs of scraper conveyer by V (vacuum) method |
| CN204194714U (en) * | 2014-08-18 | 2015-03-11 | 成都新同高复合器材有限公司 | V method casting molds |
| CN204997002U (en) * | 2015-08-12 | 2016-01-27 | 江苏双星特钢有限公司 | V method casting device of welt |
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| Publication number | Publication date |
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| CN108655367A (en) | 2018-10-16 |
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