CN109483913A - A kind of low temperature fast pultrusion moulding process of composite material - Google Patents
A kind of low temperature fast pultrusion moulding process of composite material Download PDFInfo
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- CN109483913A CN109483913A CN201910017513.6A CN201910017513A CN109483913A CN 109483913 A CN109483913 A CN 109483913A CN 201910017513 A CN201910017513 A CN 201910017513A CN 109483913 A CN109483913 A CN 109483913A
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- composite material
- preforming
- pultrusion
- resin
- low temperature
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- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
- B29C70/521—Pultrusion, i.e. forming and compressing by continuously pulling through a die and impregnating the reinforcement before the die
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention discloses the low temperature fast pultrusion moulding process of a composite material, and by being oriented to step, the continuous fiber being placed on creel is drawn by guiding and collating unit, send to pre-shaping device and resin impregnation tank；By resin impregnation step, thermosetting resin, curing agent, initiator are injected into pre-shaping device and resin impregnation tank as after certain mass ratio metering by high pressure with self-measuring device, resin mixing passes through static mixer and implements；Keep composite material preforming by 3 sections of heating of preforming step；Preforming composite material is drawn pultrusion by clamping traction device by last distraction step.Production efficiency of present invention under the conditions of same raw materials improves 10 times or more, and the product strength produced is higher, and product structure is more uniform closely knit, and quality stability is higher, significantly reduces the discreteness of composite material.
Description
Technical field
The present invention relates to composite material process plannings, form work more particularly, to a kind of low temperature fast pultrusion of composite material
Skill.
Background technique
Currently, conventional pultrude process is all to keep the reinforcing material for infiltrating resin solid by 3 sections of heating in a mold
The composite products of mold sections shape are melted into, pultrusion die plays the role of plastic squeeze first, extra resin is being entered die orifice
It all squeezes out, this is very high to the traction force request of the dragger of pultrusion.
Under conventional pultrude process, since heating method is typically all 3 sections of heating, in actual production, this 3 sections of heating zones
It can influence each other, to increase the unstable of final products performance.Meanwhile heat is all inside from superficial layer in 3 sections of heating
Hot transmitting is done, resin is the non-conductor of heat, it is difficult to ensure that final products radial direction is the same curing degree.Resin formula
In it is mostly be using thermohardening type curing agent, the thicker product of thickness is easy to generate cracking because of curing exotherm, 3 sections of heating processes
In as the presence of heating efficiency and the temperature difference and make product warpage.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of low temperature fast pultrusion moulding process of composite material, passes through
Pultrusion formula is adjusted, thermo-responsive medium is added, solidify product can integrally simultaneously under cryogenic, product after molding is strong
Du Genggao greatly improves production efficiency.
The technical solution adopted by the present invention to solve the technical problems is: a kind of low temperature fast pultrusion molding of composite material
Technique, comprising the following steps:
Step 1, fibre guide step are placed on continuous fiber on creel and are drawn by guiding and collating unit, send in advance at
Type device and resin impregnation tank；
Thermosetting resin, curing agent, initiator are pressed certain mass by self-measuring device by step 2, resin impregnation step
Than being injected into pre-shaping device and resin impregnation tank after metering by high pressure, resin mixing is implemented by static mixer；
Step 3, preforming step include 3 sections of heating in pre-shaping device, are preheating zone, gel area and flat-temperature zone respectively.
The effect of preheating zone is to do preheating for subsequent region reaction to prepare, and in gel area, resin is cured crosslinking and generates reaction,
It is changed into gel state from sticky state, subsequently into flat-temperature zone, the effect of flat-temperature zone is to maintain the constant temperature of product, prevents temperature shock
Crack composite material；
Preforming composite material is drawn pultrusion by clamping traction device by step 4, distraction step.
In above-mentioned technical proposal, it is preferred that in the step 2, the thermosetting resin, the curing agent, the initiation
The proportion of agent is 100 parts of the thermosetting resin, described curing agent 0.8-1.2 parts, described initiator 0.05-0.1 parts.
In above-mentioned technical proposal, it is preferred that the initiator is cobalt salt.In this way, by the way that cobalt salt is added as temperature-sensitive
Feel medium, solidify preforming composite material can simultaneously at low temperature.
In above-mentioned technical proposal, it is preferred that in the step 3, the preheating zone temperature is 50 DEG C -60 DEG C, the gel
Area's temperature is 75 DEG C -85 DEG C, and the flat-temperature zone temperature is 55-65 DEG C.It can make composite wood in lower temperature range
Material is solidified.
In above-mentioned technical proposal, it is preferred that in the step 4, the clamping traction device include fixture, support base and
Hydraulic cylinder, the fixture are mounted on the support base, and preforming composite material is placed among the fixture, the fixture
It is opened and closed up and down by compressed air to clamp the preforming composite material, described in fixture described in the Driven by Hydraulic Cylinder drives
The outside pultrusion of preforming composite material, in pultrusion process, the further curing molding of preforming composite material.
In above-mentioned technical proposal, it is preferred that the linear velocity of the clamping traction device can control, with mold temperature and tree
The cooperation of rouge curing system.Quality of the temperature control planning of die region to pultrusion throughput rate and product, temperature controlled pass
Key is that make material solidification rate consistent with the hauling speed of composite material, while guaranteeing homogeneous heating, in this way, can make multiple
Solidification rate is consistent condensation material everywhere, and the quality of product and performance is made to be guaranteed.
The beneficial effects of the present invention are: preforming answers by the way that cobalt salt is added in product formula as thermo-responsive medium
The temperature control in three sections of regions in condensation material distraction procedure, and the control to hauling speed, make the present invention in same raw materials
Under the conditions of production efficiency improve 10 times or more, the product strength produced is higher, and product structure is more uniform closely knit, and quality is steady
It is qualitative higher, significantly reduce the discreteness of composite material.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is process flow chart of the invention.
Specific embodiment
As shown in Figure 1, a kind of low temperature fast pultrusion moulding process of composite material, comprising the following steps:
Step 1, fibre guide step are placed on continuous fiber on creel and are drawn by guiding and collating unit, send in advance at
Type device and resin impregnation tank, guiding device make mouth mold of the fiber from pedestal to pre-shaping device keep straight, pair so fiber
Apply identical power, avoids causing product distortion to deform because of the tension variation between fiber.
Thermosetting resin, curing agent, cobalt salt are pressed thermosetting property by self-measuring device by step 2, resin impregnation step
100 parts of resin, 1 part of curing agent, pre-shaping device is injected by high pressure after the mass ratio metering that 0.1 part of cobalt salt and resin impregnates
In slot, resin mixing is by static mixer implementation, after being mixed automatically by automatic gauge, then is injected by high pressure preforming
In device and resin impregnation tank, whole process guarantees that no escaping gas generates, resin waste that will not be extra, while high
Pressure accelerates the abundant impregnation of resin and fiber.
Step 3, preforming step include 3 sections of heating in pre-shaping device, are preheating zone, gel area and constant temperature respectively
Area.Preheating zone control is at 60 DEG C, and at 80 DEG C, flat-temperature zone is controlled at 60 DEG C the control of gel area temperature.The effect of preheating zone is under
The reaction of one region is done preheating and is prepared, and in gel area, resin is cured crosslinking and generates reaction, is changed into gel from sticky state
State, subsequently into flat-temperature zone, the effect of flat-temperature zone is to maintain the constant temperature of product, prevents temperature shock from split composite material generation
Line.
Preforming composite material is drawn pultrusion by clamping traction device by step 4, distraction step.The folder
Holding traction device includes fixture, support base and hydraulic cylinder, and the fixture is mounted on the support base, by preforming composite wood
Material is placed among the fixture, and the fixture is opened and closed up and down by compressed air to clamp the preforming composite material, institute
It states fixture described in Driven by Hydraulic Cylinder and drives the outside pultrusion of preforming composite material, it is described preforming in pultrusion process
The further curing molding of composite material.
Claims (6)
1. a kind of low temperature fast pultrusion moulding process of composite material, which comprises the following steps:
Step 1, fibre guide step are placed on continuous fiber on creel and are drawn by guiding and collating unit, send in advance at
Type device and resin impregnation tank；
Thermosetting resin, curing agent, initiator are pressed certain mass by self-measuring device by step 2, resin impregnation step
Than being injected into pre-shaping device and resin impregnation tank after metering by high pressure, resin mixing is implemented by static mixer；
Step 3, preforming step include 3 sections of heating in pre-shaping device, are preheating zone, gel area and flat-temperature zone respectively；
Preforming composite material is drawn pultrusion by clamping traction device by step 4, distraction step.
2. a kind of low temperature fast pultrusion moulding process of composite material according to claim 1, which is characterized in that the step
In rapid two, the thermosetting resin, the curing agent, the initiator proportion be 100 parts of the thermosetting resin, it is described
0.8-1.2 parts of curing agent, described initiator 0.05-0.1 parts.
3. a kind of low temperature fast pultrusion moulding process of composite material according to claims 1 and 2, which is characterized in that institute
Stating initiator is cobalt salt.
4. a kind of low temperature fast pultrusion moulding process of composite material according to claim 1, which is characterized in that the step
In rapid three, the preheating zone temperature is 50 DEG C -60 DEG C, and gel area temperature is 75 DEG C -85 DEG C, and the flat-temperature zone temperature is
55-65℃。
5. a kind of low temperature fast pultrusion moulding process of composite material according to claim 1, which is characterized in that the step
In rapid four, the clamping traction device includes fixture, support base and hydraulic cylinder, and the fixture is mounted on the support base, will
Preforming composite material is placed among the fixture, and the fixture is opened and closed described preforming to clamp up and down by compressed air
Composite material, fixture described in the Driven by Hydraulic Cylinder drives the outside pultrusion of preforming composite material, in pultrusion process
In, the further curing molding of preforming composite material.
6. a kind of low temperature fast pultrusion moulding process of composite material according to claim 5, which is characterized in that the folder
The linear velocity for holding traction device can control, and cooperate with mold temperature and resin curing system.
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| CN201910017513.6A CN109483913A (en) | 2019-01-09 | 2019-01-09 | A kind of low temperature fast pultrusion moulding process of composite material |
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| CN201910017513.6A CN109483913A (en) | 2019-01-09 | 2019-01-09 | A kind of low temperature fast pultrusion moulding process of composite material |
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Citations (9)
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| CN102303412A (en) * | 2011-08-10 | 2012-01-04 | 蓝星(北京)化工机械有限公司 | Far infrared heating method and device for pull extrusion pre-forming area |
| CN102700153A (en) * | 2012-06-12 | 2012-10-03 | 江苏恒神纤维材料有限公司 | Continuous pultrusion manufacturing method and production device for fibrous composite drive shaft |
| CN104723583A (en) * | 2015-03-30 | 2015-06-24 | 南京航空航天大学 | Equipment and method for preparing composite material, Z-pin, by using electronic beam curing technology |
| CN104960211A (en) * | 2015-05-27 | 2015-10-07 | 郑州大学 | FRP rib production technology and FRP rib production apparatus |
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2019
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| CN104723583A (en) * | 2015-03-30 | 2015-06-24 | 南京航空航天大学 | Equipment and method for preparing composite material, Z-pin, by using electronic beam curing technology |
| CN104960211A (en) * | 2015-05-27 | 2015-10-07 | 郑州大学 | FRP rib production technology and FRP rib production apparatus |
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Application publication date: 20190319 |