CN109676853A - A kind of feed process of molded urethane foaming product - Google Patents
A kind of feed process of molded urethane foaming product Download PDFInfo
- Publication number
- CN109676853A CN109676853A CN201910081356.5A CN201910081356A CN109676853A CN 109676853 A CN109676853 A CN 109676853A CN 201910081356 A CN201910081356 A CN 201910081356A CN 109676853 A CN109676853 A CN 109676853A
- Authority
- CN
- China
- Prior art keywords
- spray gun
- clout
- feed process
- mold
- urethane foaming
- 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
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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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/36—Feeding the material to be shaped
- B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
- B29C44/42—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum
-
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/60—Measuring, controlling or regulating
-
- 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
- B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
-
- 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
- B29L2030/00—Pneumatic or solid tyres or parts thereof
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The present invention relates to tyre technologies, a kind of feed process of molded urethane foaming product is disclosed, first docks spray gun with the feed inlet of mold, spray gun is then controlled to die clearance formula and injects expanded beads raw material, after expanded beads are injected mold by spray gun, clout in spray gun is removed in control；Using this feed process, due to injecting expanded beads using control clearance-type, so raw material is more abundant for the cavity filling of mold；Meanwhile being purged the clout in spray gun after material feeding, keep the amount for injecting raw material more accurate, raw material filling is fuller, and product molding qualification rate is high；And this clearance-type feeding manner can also be substantially reduced 15~30% compressed gas usage amount, save energy consumption.
Description
Technical field
The present invention relates to foaming technical field more particularly to a kind of feed process of molded urethane foaming product.
Background technique
E-TPU is a kind of novel polyurethane foam material, it is using environmental-friendly supercritical fluid as foaming
Agent makes the volume expansion of TPU elastic particle to several times using the method for physical blowing, and inside is full of the minute bubbles of countless closed pores.Cause
The appearance and puffed rice of E-TPU expanded particle are similar to, therefore also referred to as " puffed rice " material.
Existing moulding process mainly passes through spray gun and send expanded beads into molding die by air pressure, then to mould
Tool, which carries out heating, makes expanded beads carry out steam cure and form.The inventors discovered that this moulding process is in actual use,
Often it will appear the excessive material of the curing of smaller portions in molding product, so as to cause under the total quality parameter of product
Drop proposes to improve in view of this, inventor is tested and verified repeatedly to this.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of charging side of molded urethane foaming product
Method, the Forming Quality of product can be improved using this feed process, and can obviously reduce the required electric energy of molding.
To achieve the above object, the feed process of a kind of molded urethane foaming product of the invention, first by spray gun and mould
The feed inlet of tool docks, and then controls spray gun to die clearance formula and injects expanded beads raw material, when spray gun injects expanded beads
After mold, clout in spray gun is removed in control.
Further, the time of spray gun to mold injection expanded beads is 5~25 seconds, at least suspends 1 time during material feeding, temporarily
It is 0.5~1.5 second between stopping time.
Further, when moulded products are tire and diameter is 100~150mm, suspending count is 1 time, is suspended every time
Time is 0.5 second；When moulded products are tire and diameter is 151~220mm, suspending count is 3 times, and each time out is
0.5 second.
Further, the solenoid valve for being used for blowing is set in spray gun, and clout is that control solenoid valve is slow in the removing spray gun
It is slow to close.
Further, clout is to recycle to adsorb by air pressure in the removing spray gun, and clout is made to be recovered to material by expects pipe
Cylinder.
Further, it is provided with flowmeter in the spray gun, when material feeding reaches flow default value M, stops material feeding, and
The clout in spray gun is removed in control.
Further, thermal insulation layer is provided between the pipette tips and mold of the spray gun.
Beneficial effects of the present invention: compared with prior art, a kind of charging of molded urethane foaming product of the invention
Method first docks spray gun with the feed inlet of mold, then controls spray gun to die clearance formula and injects expanded beads raw material, works as material
After expanded beads are injected mold by rifle, clout in spray gun is removed in control；Using this feed process, due to using control clearance-type note
Enter expanded beads, so raw material is more abundant for the cavity filling of mold；Meanwhile the clout in spray gun being carried out after material feeding
It removes, keeps the amount for injecting raw material more accurate, product molding qualification rate is high；And this clearance-type feeding manner can also obviously drop
Low 30% compressed gas usage amount saves energy consumption.
Specific embodiment
The present invention will be described in detail below.
Often at work due to existing spray gun, during polyurethane foaming particle is always filled in rifle, and the present invention mentions
For a kind of feed process of molded urethane foaming product, first spray gun is docked with the feed inlet of mold, then control spray gun to
Die clearance formula injects expanded beads raw material, and this clearance-type charging was primarily referred to as in the material feeding period, and at least pause is primary, from
And the feed particles having been injected into mold mold is enable adequately freely to fill, then when re-injecting when feed particles,
More accurate injection and filling can be formed.After expanded beads are injected mold by spray gun, clout in spray gun is removed in control；Make
With this feed process, clearance-type injection expanded beads are controlled due to using, so raw material more fills the cavity filling of mold
Point；Meanwhile being purged the clout in spray gun after material feeding, keep the amount for injecting raw material more accurate, product molding qualification rate
It is high；And this clearance-type feeding manner can also be substantially reduced about 30% compressed gas usage amount, save energy consumption.
It is further to note that the clout in spray gun is purged, biggest advantage is: when mold molding,
A large amount of steam, which can be filled in mold, cures expanded beads, at this point, high-temperature steam can also escape through the charging of mold
Runner enters in spray gun, and inlet amount caused by being foamed so as to avoid the material stock in present technology spray gun by high-temperature steam curing is not
Accurately, phenomena such as product weight is abnormal, Article Stiffness Determination is uneven.
Certainly, preferably, further including carrying out negative-pressure adsorption step to spray gun, this is negative before material feeding in existing feed process
Pressing adsorption time is 0.3~0.8 second, to realize that the steam entered in spray gun when forming to last mold and condensed water carry out
Discharge, reduces the moisture of moulded products.
In the present embodiment, the time of spray gun to mold injection expanded beads is 1~5 second, at least suspends 1 during material feeding
Secondary, time out is 0.5~2 second.It is learnt through the practical measuring and calculating of the present inventor, it is primary according to its spray gun of prior art moulding process
Property material feeding air pressure be 11~15kg/cm2, 1 hour air compressor machine power consumption is 55 kilowatt hours；And use the gap of this feeding method
It is 6~10kg/cm that formula material feeding, which only needs air pressure,2Power consumption is 39 kilowatt hours, hence it is evident that reduces electricity consumption.
When moulded products are tire and diameter is 100~150mm, suspending count is 1 time, and time out is 0.5 second, material
The time of rifle to mold injection expanded beads is 5~12 seconds.
When moulded products are tire and diameter is 151~220mm, suspending count is 3 times, and each time out is 0.5
Second, the time of spray gun to mold injection expanded beads is 7~15 seconds.
When moulded products are tire and diameter is 221~330mm, suspending count is 8 times, and each time out is 0.5
Second, the time of spray gun to mold injection expanded beads is 9~20 seconds.
When moulded products are tire and diameter is 340~400mm, suspending count is 10 times, and each time out is 0.5
Second, the time of spray gun to mold injection expanded beads is 10~25 seconds.
In order to preferably control spray gun, there is no remaining raw material after so that spray gun is completed material feeding, be used for being provided in spray gun
The solenoid valve of blowing, clout is control solenoid valve slowly closing in the removing spray gun.When be near completion material feeding when, pass through control
The mode that valve magnet valve progressively closes off refers specifically to complete slow closing motion in 0.5~2 second by controlling solenoid valve, in this way
Effect be: during progressively closing off, material mouth is constantly reduced solenoid valve, and raw material enters the amounts of pipette tips also increasingly
Few, when will be fully off shortly, raw material cannot can still be admitted to mold by the raw material of solenoid valve by solenoid valve
In, it the problem of being stranded in spray gun pipette tips so as to avoid raw material, i.e., will not be to spray gun when steam escapes into spray gun from mold material path
In raw material formed curing, avoid blocking.
And as another embodiment, in the removing spray gun, clout is to recycle to adsorb by air pressure, and clout is made to pass through expects pipe
It is recovered to material cylinder.The present embodiment using: after completing material feeding, absorption is recycled by air pressure and is formed to being detained clout in spray gun
Sweeping through the material movement, clout is recycled in material cylinder, using the control mode of the present embodiment, raw material can also be avoided to be stranded in spray gun
The problem of, i.e., the raw material in spray gun will not be formed and be cured when steam escapes into spray gun from mold material path, avoid blocking, control is more
Add simply, without solenoid valve control, safeguards also more convenient.
For the control for keeping the inlet amount of this feed process more accurate, it is provided with flowmeter in the spray gun, flows
Meter can preset M value, which is variable, be preset according to user, when material feeding reaches flow default value M
When, stop material feeding, and control the clout removed in spray gun, when removing the clout in spray gun, the negative pressure value controlled in spray gun is
Between 0.8Mpa~1.0Mpa, in the negative pressure value section, it may be implemented to remove the clout in spray gun；But also it can be because avoiding
The material that big negative pressure value makes to have been injected into mould is sucked back into spray gun, is learnt through experiment test, further combines control negative
The time that pressure value is implemented is 1~2 second, can fully achieve the removing of clout in spray gun and avoid mold material by back suction.
Since pipette tips are usually to be made of metal material, and metal material heating conduction with higher itself, in order to
It influences pipette tips reduction by the high temperature of mold, is provided with thermal insulation layer between the pipette tips and mold of the spray gun, thermal insulation layer is best
Using ceramic ring, this ceramics ring pads are set between mold and the pipette tips of spray gun, thermal conductivity have been hindered but, thus with more permanent
Service life.
The above is only a preferred embodiment of the present invention, for those of ordinary skill in the art, according to the present invention
Thought, there will be changes in the specific implementation manner and application range, and the content of the present specification should not be construed as bright to this
Limitation.
Claims (7)
1. a kind of feed process of molded urethane foaming product, it is characterised in that: first spray gun is docked with the feed inlet of mold,
Then control spray gun injects expanded beads raw material to die clearance formula, and after expanded beads are injected mold by spray gun, control is removed
Clout in spray gun.
2. a kind of feed process of molded urethane foaming product according to claim 1, it is characterised in that: spray gun is to mould
The time of tool injection expanded beads is 5~25 seconds, is at least suspended during material feeding 1 time, and time out is 0.5~1.5 second.
3. a kind of feed process of molded urethane foaming product according to claim 1, it is characterised in that: when molding is made
When product are tire and diameter is 100~150mm, suspending count is 1 time, and time out is 0.5 second；When moulded products be tire and
When diameter is 151~220mm, suspending count is 3 times, and each time out is 0.5 second.
4. a kind of feed process of molded urethane foaming product according to claim 1, it is characterised in that: set in spray gun
The solenoid valve for blowing is set, clout is control solenoid valve slowly closing in the removing spray gun.
5. a kind of feed process of molded urethane foaming product according to claim 1, it is characterised in that: the removing
Clout is to recycle to adsorb by air pressure in spray gun, and clout is made to be recovered to material cylinder by expects pipe.
6. a kind of feed process of molded urethane foaming product according to claim 1, it is characterised in that: the spray gun
In be provided with flowmeter, when material feeding reaches flow default value M, stop material feeding, and control remove spray gun in clout.
7. a kind of feed process of described in any item molded urethane foaming products, feature exist according to claim 1~6
In: thermal insulation layer is provided between the pipette tips and mold of the spray gun.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910081356.5A CN109676853A (en) | 2019-01-28 | 2019-01-28 | A kind of feed process of molded urethane foaming product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910081356.5A CN109676853A (en) | 2019-01-28 | 2019-01-28 | A kind of feed process of molded urethane foaming product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109676853A true CN109676853A (en) | 2019-04-26 |
Family
ID=66194906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910081356.5A Pending CN109676853A (en) | 2019-01-28 | 2019-01-28 | A kind of feed process of molded urethane foaming product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109676853A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101537667A (en) * | 2008-03-17 | 2009-09-23 | 王瑞启 | Low-pressure no-clean polyurethane foam mixing head |
| CN103341944A (en) * | 2013-07-10 | 2013-10-09 | 青岛海尔电冰箱（国际）有限公司 | Foaming method |
| CN203449578U (en) * | 2013-08-30 | 2014-02-26 | 山东通佳机械有限公司 | Intermittent foaming rod machine head |
-
2019
- 2019-01-28 CN CN201910081356.5A patent/CN109676853A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101537667A (en) * | 2008-03-17 | 2009-09-23 | 王瑞启 | Low-pressure no-clean polyurethane foam mixing head |
| CN103341944A (en) * | 2013-07-10 | 2013-10-09 | 青岛海尔电冰箱（国际）有限公司 | Foaming method |
| CN203449578U (en) * | 2013-08-30 | 2014-02-26 | 山东通佳机械有限公司 | Intermittent foaming rod machine head |
Non-Patent Citations (1)
| Title |
|---|
| 韩喜林: "《新型防水材料应用技术》", 31 March 2003, 中国建材工业出版社 * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190426 |
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| RJ01 | Rejection of invention patent application after publication |