CN105946206A - Vacuum forming technology and device for regenerated leather skin for automobile instrument panel - Google Patents

Vacuum forming technology and device for regenerated leather skin for automobile instrument panel Download PDF

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Publication number
CN105946206A
CN105946206A CN201610462817.XA CN201610462817A CN105946206A CN 105946206 A CN105946206 A CN 105946206A CN 201610462817 A CN201610462817 A CN 201610462817A CN 105946206 A CN105946206 A CN 105946206A
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regenerated leather
heating
sheet material
instrument panel
leather
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CN105946206B (en
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贾玉玺
赵亚如
智杰颖
周勇
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Shandong University
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Shandong University
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    • 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
    • B29C51/00Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/10Forming by pressure difference, e.g. vacuum
    • 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
    • B29C51/00Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26Component parts, details or accessories; Auxiliary operations
    • B29C51/46Measuring, controlling or regulating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/58Upholstery or cushions, e.g. vehicle upholstery or interior padding

Abstract

The invention provides a vacuum forming technology and device for regenerated leather skin for an automobile instrument panel. The technology comprises the following steps: uniformly mixing thermoplastic synthetic fiber, which adopts a skin-core structure, with real leather fiber, and producing skin-core thermoplastic synthetic fiber mixed regenerated leather for the automobile instrument panel by a non-weaving technology; and during a vacuum forming process, realizing multi-station integrated forming of the regenerated leather skin for the automobile instrument panel by use of the vacuum forming device provided by the invention via the stations of regenerated leather roll spreading, accurate temperature-control heating, formed skin fixing and vacuum forming, regenerated leather scrap reclaiming and the like, thus obtaining the instrument panel skin with excellent service performance and forming performance. The technology provided by the invention is simple, is convenient to operate and has high practicability.

Description

The vacuum plastics sucking molding technique of the regenerated leather epidermis of fascia and device
Technical field
The present invention relates to automotive trim field, particularly to the vacuum plastics sucking molding technique of regenerated leather epidermis and the dress of fascia Put.
Background technology
The raising realized along with people's level of consumption and environmental protection, consumer is to the function of automotive trim, attractive in appearance, environmental protection aspect Have higher requirement.At present, automotive instrument panel skins mainly uses polrvinyl chloride (PVC) in addition to minority uses leather material Macromolecular material is synthesized with polyurethane (PU) etc..In recent years, along with more American-European countries and the call of green peace organization, very Many national government limit and use PVC product.Although environment-friendlyPU PU synthetic leather disclosure satisfy that superior automobile interior trim demand, but it is relatively High price especially dependency to petroleum resources still limits its application at automotive trim.
Make full use of corium to give up corner material, the corium fabric regenerated leather that prepared by nonwoven techniques, not only environmental protection, and having There are good texture and elasticity, are applied to automotive trim and will significantly improve class and the texture of interior products.But one-component is true Hide fiber regenerated leather produces under conditions of heating and shrinks, and mouldability is bad, is currently limited to the goods without complex geometric shapes, Such as furniture, case and bag, automobile cushion, computer cover etc., the dry contraction of regenerated leather and mouldability problem limit it at automotive trim row The extensive application of industry.
Different from the moulding process of the corium fabric regenerated leather goods such as case and bag, automobile cushion, this material is at automotive instrument panel skins Successful Application must solve the problem in terms of following two: first, uses the corium fabric regenerated leather that non-woven fabrics craft prepares, only Make to cross-link in the way of physical mechanical entanglement between animal skins fiber, its tensile strength, elasticity and tear resistance and Initial skin Leather has compared bigger gap, it is easy to occur bigger resilience after contraction, processability deficiency and goods processing in forming process Etc. problem;Secondly, automotive instrument panel skins is during vacuum forming, owing to its deformation is complicated, causes goods fold, serious The generation of the defects such as thinning even breakage.
Chinese patent CN2013104611955 discloses a kind of natural fiber/thermoplas tic resin composite's automotive trim panel and mixture Method.Thermoplastic synthetic fiber and natural fiber being bondd through die press technology for forming, preparation has larger thickness, higher hardness and strong Degree and the automotive trim panel of rigidity, this moulding process is not particularly suited for the automotive instrument panel skins higher to flexibility requirements;And its heat Plasticity synthetic fibers consumption is big, reduces the effect of environmental protection.
This patent is intended expanding the corium fabric regenerated leather range of application in automotive trim industry further, by inhaling raw material, vacuum Mould the optimization of technique and plastic uptake device and overcome the problem of above-mentioned processability difference, regenerated leather is applied to automotive instrument panel skins this Complex-shaped crucial inner decoration piece epidermis, can not only effectively " turn waste into wealth ", alleviates the nervous form of non-renewable fossil resource, And cater to market demand, improve product specification, thus create considerable economic benefit.
Summary of the invention
For produced problem in above-mentioned automotive instrument panel skins forming process, the present invention will be mainly by raw-material selection, true Suction mould the control of technological parameter, vacuum forming device three aspects of design to ensure the quality of instrument board regenerated leather epidermis.
First, the corium fabric single for the regenerated leather material not composition of automotive instrument panel skins that the present invention proposes, but Blend the thermoplastic synthetic fiber with skin-core structure of certain percentage.The thermoplastic synthetic fiber with skin-core structure can be Relatively low heating-up temperature lower surface melts, and plays the effect of bonding animal skins fiber, and sandwich layer melt temperature is higher, remains to keep Threadiness, and in forming process, play the effect of skeletal support and enhancing, thus give and mixed the heat with skin-core structure The deformability that the corium fabric regenerated leather of plasticity synthetic fibers is bigger, the molding for automotive instrument panel skins provides material to ensure. When occurring driving dangerous, instrument panel surfaces need to coordinate the ejection of air bag to protect the safety of driver and crew, and this just requires instrument Plate epidermis has good elasticity and suitable intensity.In view of above-mentioned requirements, the present invention is to " the component pair of corium fabric regenerated leather Regenerated leather epidermis serviceability and the impact of processability " carry out systematic analysis and groped.Result shows: when skin-core structure When the mass fraction of thermoplastic synthetic fiber is 8%~20%, the thermoplastic synthetic fiber of blending realizes preferably with animal skins fiber Physical bond, makes the stretching of regenerated leather epidermis and tearing strength rise to suitable degree, can guarantee that again the elasticity of goods simultaneously.
Second, the molding of automotive instrument panel skins selects vacuum forming technique.Multiple matrix it is provided with according to demand at heating region The heating unit of formula arrangement, each heating unit is constituted, by point-to-point temperature control system by the quartz heating brick including heating muff System can realize heating on-demand to different heating region.By to works such as temperature, heating rate, pressure and times in forming process The control of skill parameter, reaches following purpose: by " on-demand heating ", the deformation quantity of conservative control regenerated leather, avoid epidermis as far as possible Fold and formed product after the problem such as resilience;Optimize molding temperature and pressure, it is ensured that PU sheet material is to mold pattern Repeatability (when using former plastics sucking moulding), it is ensured that PU sheet material and the boundary strength of regenerated leather, conservative control PU sheet material is to again The infiltration thickness of raw leather, prevents the blocked up style affecting leather uniqueness of penetrating layer.
3rd, rationally select former or male mould forming technique according to the specific requirement of automotive instrument panel skins.Formpiston vacuum forming becomes Type requires that PU sheet material has a leather texture imitation pattern, and can complete the bonding of instrument panel surfaces and instrument board framework during plastic uptake, Though this formpiston vacuum plastics sucking molding technique has the high advantage with low cost of production efficiency, but owing to PU decorative pattern is to print in advance System, forming process causes because of the uneven of amount of tension the deformation of PU decorative pattern even disappear, and then cause instrument panel surfaces light The change in pool.PU sheet material needed for former vacuum suction moulding is without predetermined pattern, it is also possible to avoids the deformation of decorative pattern or disappears Lose, disposably complete the inscription rubbing of molding and decorative pattern at plastic uptake station.
An object of the present invention is to provide a kind of corium fabric regenerated leather with good processability, described regenerated leather material The not corium fabric of single component, but mix a certain proportion of thermoplastic synthetic fiber with skin-core structure.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of vacuum plastics sucking molding technique of fascia regenerated leather epidermis, including:
The thermoplastic synthetic fiber of the skin-core structure that mass fraction is 8%~20% is blended, through preparing without spinning process in corium fabric Corium fabric regenerated leather;
The corium fabric regenerated leather coiled strip prepared is carried out uncoiling with PU film roll material, sprawls;
Precisely temperature control thermal regeneration leather and the sheet material of PU;
The sheet edge of regenerated leather and PU is fixed;
Vacuum suction moulding;
Cooling, obtains the automotive instrument panel skins of molding;
Molded automotive instrument panel skins is cut and waste material rolling.
Research finds: if the mass fraction of the thermoplastic synthetic fiber of skin-core structure is higher than 20%, then corium fabric regenerated leather epidermis Shore hardness (A) often beyond 100, be difficult to meet the flexibility requirements of interior trim epidermis, in air bag blasting process, Driver and crew may be damaged by its fragment;If the mass fraction of the thermoplastic synthetic fiber of skin-core structure is less than 8%, then shore Hardness (A) is often below 50, it is impossible to significantly improves stretching and the tearing strength of regenerated leather, and is difficult to having of regenerated leather Effect molding, and directly affect wearability and the service life of its goods.Therefore, the thermoplasticity synthesis fibre of skin-core structure in the present invention The mass fraction of dimension is set as 8%~20%.
Heretofore described " shore hardness " is: for determining the relative hardness of the flexible material such as plastics or rubber.It is measured Regulation pressing needle penetration under specifying pressure and time conditions.Hardness number is used for identifying or specifying plastics or the rubber of special hardness Glue, it is possible to as the quality control of many batch of materials.Comparison industry standard, can weigh the matter of epidermis by the numerical value of shore hardness Sense and elasticity.
Preferably, the cortex fusing point of described skin-core structure thermoplastic synthetic fiber is lower at least 20 DEG C than sandwich layer fusing point, and cortex fusing point Temperature is 70~130 DEG C.If cortex melt temperature is too low, regenerated leather goods are easily affected by external environment and then are caused performance Unstability, if cortex melt temperature is higher than 130 DEG C, the highest heating-up temperature can damage the texture of corium fabric.
Further, described skin-core structure thermoplastic synthetic fiber be have 4080 fibers of skin-core structure, N720 fiber type, ES fiber etc..Preferably 4080 fibers.
Preferably, the length of corium fabric is between 30~60mm, and longer fiber can give the good intensity of product and kishke feel But difficulty of processing can be increased.
The thickness of described corium fabric regenerated leather is 0.8~1.5mm.
Preferably, the actual conditions of described technique includes:
(1) regenerated leather coiled strip and PU film roll material are sent into the exhibition material station of vacuum suction moulding device, and uncoiling simultaneously, by fixed Regenerated leather and PU sheet material are transported to heating station by position roller and conveyer belt;
(2) regenerated leather and PU sheet material being transported to heating station being carried out accurate temperature control heating, heating region is by matrix arrangement Heating unit composition, each heating unit all can realize independent temperature control;Heating process becomes previously according to instrument board zones of different The difference of shape amount, arranges suitable heating-up temperature and heating rate;The zones of different making regenerated leather and PU sheet material has different Deformability;
(3) regenerated leather and PU sheet material after heating are transported to rapidly above vacuum forming mould, at the axis of strip regenerated leather Direction gives certain material compensation, is fixed on four limits, blasts hot-air in confined chamber, makes sheet material be formed certain pre- Deflection;Keep temperature that regenerated leather reaches at former heating station thus be precisely controlled to type deflection, and avoid regenerated leather and PU film is sagging and comes in contact with equipment and mold;
(4) the instrument panel surfaces mould after preheating rises, and stops being passed through hot-air, between formed sheet and mould Formed and seal space, and rapidly by the confined space evacuation between mould and sheet material, by an atm difference on sheet material two sides It is made to be overlying on after deforming in mold wheel profile surface;
(5) after the regenerated leather epidermis molding of fascia terminates, from the top air blast cooling of molding epidermis, treat interior trim epidermis and After mould is cooled to uniform temperature, it is positioned at the interior trim epidermis cutting tool landing above mould, completes cutting of instrument panel surfaces;
(6) taking off instrument panel surfaces, remaining discarded regenerated leather reclaims at equipment end and focuses on.
Preferably, the concrete size of the matrix form heating system described in step (2) and the quantity of heating unit can fill according to molding Standby and moulding process required precision is adjusted, and such as, uses 240 heat control unit, each heating in the whole thermal treatment zone Unit is sized to 100 × 60mm.
Preferably, described regenerated leather epidermis need to be quickly ramped up to preset temperature, the rate of heat addition 10~20 DEG C/min, whole moulding process Heat time heating time is 10~25s.
Preferably, in step (2), described regenerated leather is maintained at 110~140 DEG C, locally with the average heating-up temperature of PU sheet material Region can regulate and control concrete heating-up temperature according to deflection, in the range of 100~160 DEG C.It has been investigated that, regenerated leather and PU sheet material If average heating-up temperature less than 110 DEG C, then be difficult to the permanent sizing of instrument board regenerated leather epidermis, lower the temperature it at shaped article After there will be serious deformation resilience phenomenon;And averagely heating-up temperature is if above 140 DEG C, corium fabric is the most aging, its mechanics Intensity declines serious, it is impossible to meet the mechanical property requirements of follow-up complicated shape molding.
Preferably, in step (3), described in blast the temperature of hot-air be 80~100 DEG C, the persistent period that hot-air blasts is about 10~25s.Blast the pre-heating temperature of the temperature of hot-air and regenerated leather and PU sheet material closer to, then at vacuum suction moulding station More can keep regenerated leather and the pre-heating temperature of PU sheet material, but consider and add the energy resource consumption of hot-air and regenerated leather and PU The temperature of sheet material keeps effect, preferably hot air temperature to be 80~100 DEG C.Hot-air blasts the control of time and depends on molding The deformation complexity of interior trim epidermis, the slightly simple interior trim epidermis of deformation blasts time realization by the shorter hot-air of setting and becomes in advance Shape;And deforming more violent and more complicated interior trim epidermis, the time needing to keep longer in forming process carries out predeformation.
Step (4) described instrument panel surfaces vacuum suction moulding mode can be female mould forming or male mould forming.
Preferably, arranging vacuum during vacuum forming is-0.07~-0.1MPa, and the pumpdown time is 15~30s.
Preferably, the thickness of described polyurethane (PU) film accounts for the 10~40% of sheet material integral thickness.
Preferably, step (5) described cooldown rate is 10~20 DEG C/min, and after cooling, products temperature is down to 30~40 DEG C.If Lowering the temperature and then affect production efficiency slowly, speed is excessive, and residual stress can not get release, and has resilience after goods thoroughly cool down The generation of warping phenomenon.
For meeting the requirement of above-mentioned moulding process, devise the corresponding station of vacuum forming device, mainly include heating and temperature control The important stations such as system, vacuum suction moulding room, refer to accompanying drawing 1.By this Multi-position integral vacuum suction moulding equipment, real Show the molding spreading into instrument panel surfaces from regenerated leather coiled strip, drastically increase production efficiency.
Present invention also offers the vacuum suction moulding device of a kind of fascia regenerated leather epidermis, including conveying mechanism, heating Mechanism, vacuum suction moulding mechanism and control system;Described conveying mechanism sequentially passes through heating arrangements, vacuum suction moulding mechanism; Described control system is connected with conveying mechanism, heating arrangements, vacuum suction moulding mechanism respectively by controlling circuit;Described conveying Mechanism is provided with registration roller, conveying deflector roll and conveyer belt;Described heating arrangements to conveying corium fabric regenerated leather and PU diaphragm Material carries out accurate temperature control heating;Described vacuum suction moulding mechanism makes described regenerated leather and PU sheet material closely be pasted on mould.
Beneficial effects of the present invention:
(1) opened up the application at automotive instrument panel skins of the corium fabric regenerated leather, enriched the classification of regenerated leather goods, improved Product specification, caters to market demand, creates huge economic benefit.Corium fabric regenerated leather is applied to automotive instrument panel skins, Not only effectively prevent waste and the leather waste pollution to environment of animal's leather material, and reduce automotive trim industry pair The dependence of synthesis macromolecular material, saves the non-renewable resources such as bulk petroleum.
(2) use corium fabric and a certain proportion of skin-core structure thermoplastic synthetic fiber to prepare regenerated leather, solve one-component true Hide fiber regenerated leather tensile strength and the shortcoming of tearing strength difference, the thermoplastic synthetic fiber mixed is not only right during thermoforming Regenerated leather plays certain skeletal support effect, and ensure that processability and the mechanical property of regenerated leather, the most effectively suppression The cold resilience of shaped article.
(3) use vacuum plastics sucking molding technique, according to the deformation of preforming epidermis different parts, be precisely controlled epidermis local Heating-up temperature, it is to avoid heating rate and the uniqueness of temperature in traditional molding.The heating unit of matrix arrangement, to preforming Regenerated leather epidermis realize the control on demand of temperature, thus be prevented effectively from the breakage of regenerated leather epidermis or the generation of fold.
Accompanying drawing explanation
Fig. 1 is the regenerated leather vacuum suction moulding device schematic diagram of instrument panel surfaces of the present invention.
Wherein, A is that station sprawled by regenerated leather coiled strip, and B is accurate temperature control heating station, and C is that regenerated leather is fixed and vacuum forming Shaping station, D is the recovery station of regenerated leather waste material.
Wherein, 101. regenerated leather coiled strips, 102.PU film roll material, 103. temperature control systems, 104. molding epidermis die-cutting rules, 105. Vacuum suction moulding room, 106. regenerated leather waste materials, 107. waste rewinding mechanisms, 108. vacuum pumps, 109. vacuum leads, 110. Instrument panel surfaces vacuum forming mould, 111. blowing lines, 112. aerators, 113. mould vacuum leads, 114. heating units, 115. registration rollers, 116. conveying deflector rolls.
Fig. 2 is the heating unit schematic diagram of the matrix arrangement of heating station.
Wherein, 201. heating units, 202. heating muffs.
Fig. 3 is instrument panel surfaces mould schematic diagram.
Wherein, 301 and 302 is all the profiled part of instrument panel surfaces mould, and this mould is according to the mode of production of a mould two pieces Design.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further elaborated.The description below is merely to explain the present invention, not in it Appearance is defined.
Embodiment 1:
(1) the most uniformly being mixed with kraft fibers by 4080 fibers, wherein the mass fraction of 4080 fibers is 12%. Then the fiber carding that will mix, then prepare regenerated leather through 7 road water jet processes.
(2) formpiston vacuum suction moulding method is selected, by gained regenerated leather in (1) (thickness about 1.0mm) and the thickness of predetermined pattern The respective coiled material of the PU sheet material of 0.5mm carries out uncoiling through exhibition material station, and wherein PU sheet material is positioned at the top of regenerated leather, and passes through Conveyer belt is sent to heating station, matrix form heating unit precisely heat regenerated leather and PU sheet material.
(3), when leather to be regenerated and PU sheet material are transported to formpiston vacuum suction moulding station, first the edge of sheet material is fixed, then Bottom vacuum forming chamber, blast the hot-air of 100 DEG C, make regenerated leather and PU sheet material upwards heave, form certain prestretched and become Shape amount.
(4) male mold rises, and is formed and seal space, at preformation after evacuation between regenerated leather and PU sheet material and mould Type
The upper and lower space of sheet material forms an atm difference so that regenerated leather and PU sheet material adhere well to molding die surface, Wherein regenerated leather directly contacts with mould, and PU sheet material directly contacts with regenerated leather and bonds.
(5) above device, the epidermis of vacuum suction moulding is carried out air blast cooling, it is achieved molded regenerated leather epidermis and shaping mould The quick cooling of tool.Cool time about 20s, the temperature after cooling is maintained at 30~40 DEG C.
(6) instrument board die-cutting rule is positioned at above mould, and after instrument panel surfaces has cooled down, cutter land, and complete Cutting.Being taken off by the instrument panel surfaces of well cutting subsequently, molding waste material moves right and rolling.
Embodiment 2:
(1) N720 viscose rayon is the most uniformly mixed with kraft fibers, wherein the thermoplastic synthetic fiber of skin-core structure The mass fraction of N720 is 14%.Mixed uniformly fiber prepares regenerated leather through air lay and six road needling processes.
(2) formpiston vacuum suction moulding method is selected, by the regenerated leather (thickness about 1.2mm) of gained and predetermined pattern in (1) The respective coiled material of the PU sheet material of thick 0.3mm carries out uncoiling through exhibition material station, and wherein PU sheet material is positioned at the top of regenerated leather, and It is sent to heating station by chain.
(3) to being transported to the regenerated leather of heating station that is made up of matrix form heating unit and PU sheet material precisely heats, For deforming the mildest region during follow-up vacuum suction moulding, set heating-up temperature as 120 DEG C;And in vacuum suction moulding process The area setpoint temperature that middle deformation is bigger is 110 DEG C;The regional area of fold easily occurs, sets heating-up temperature as 130 DEG C.
(4), when leather to be regenerated and PU sheet material are transported to formpiston vacuum suction moulding station, first the edge of sheet material is fixed, then Bottom vacuum forming chamber, blast the hot-air of 110 DEG C, make regenerated leather and PU sheet material heave downwards, form certain prestretched and become Shape amount, keeps regenerated leather and the temperature of PU sheet material simultaneously.
(5) using male mould forming, the instrument board framework of molded good and pre-glue spraying is placed in mould top, lower mold rises, Making to be formed between regenerated leather and PU sheet material and mould to seal space, the stopping of vacuum forming indoor blasts hot-air, and by instrument Confined space evacuation between dash board skeleton and sheet material, the upper and lower area of space of pre-formed sheet material forms an atm difference, then Raw leather and PU adhere well to molded instrument board framework surface.Wherein, regenerated leather and the instrument tabulare of molded and pre-glue spraying Frame directly contacts, it is achieved bonding;PU sheet material directly contacts with regenerated leather and bonds.
(6), after treating that vacuum suction moulding process terminates, air blast cooling is carried out from the lower section of molded regenerated leather epidermis, it is achieved Molding regenerated leather epidermis cools down with the quick of mould.Chilling temperature is maintained at less than 30~40 DEG C.
(7) trim panel cutting tool is positioned at above mould, and after instrument panel surfaces has cooled down, cutter land, complete Become cutting.Being taken off together with the instrument board framework bondd by the instrument panel surfaces of well cutting subsequently, molding waste material moves right And rolling.
Embodiment 3:
(1) the most uniformly being mixed with kraft fibers by 4080 viscose rayons, wherein the mass fraction of 4080 fibers is 15%. By mixed uniformly fiber by air lay, Zai Jing six road water jet process prepares regenerated leather.
(2) gained regenerated leather sheet material is combined one layer of thermoplasticity PU sheet material, PU sheet thickness about 0.5mm, described PU sheet material Need not decorative pattern is pre-machined.The composite sheet of rolling is delivered to exhibition material station uncoiling, and wherein PU sheet material is positioned at regenerated leather Lower section, and it is sent to heating station by chain.
(3) heating station being made up of matrix form heating unit realizes the accurate heating of composite sheet.
(4) composite sheet after heating is transported to vacuum suction moulding station, and is fixed by sheet edge, from vacuum forming chamber Bottom blasts hot-air, makes sheet material upwards heave, forms certain pre-tension deformation amount.
(5) using former vacuum suction moulding, the forming surface of nickel matter female mold has the floral designs of preprocessing.Mould rises, Being formed between pre-formed sheet material and mould and seal space, the evacuated upper and lower area of space at pre-formed sheet material forms one Individual atm difference, the PU sheet material in pre-formed sheet material adhere well to the profile with the female mold of floral designs, thus Floral designs are formed on PU sheet material.
(6), after treating that vacuum suction moulding process terminates, air blast cooling is carried out from molded regenerated leather epidermis top, it is achieved become Type regenerated leather epidermis cools down with the quick of mould, and the temperature after cooling is maintained at less than 30~40 DEG C.
(7) trim panel cutting tool is positioned at above mould, and after instrument panel surfaces has cooled down, cutter land, complete Become cutting.Being taken off by the instrument panel surfaces of well cutting subsequently, molding waste material moves right and rolling.
Although the detailed description of the invention of the present invention is described by the above-mentioned accompanying drawing that combines, but not limit to scope System, one of ordinary skill in the art should be understood that on the basis of technical scheme, and those skilled in the art need not pay Go out various amendments or deformation that creative work can make still within protection scope of the present invention.

Claims (10)

1. the vacuum plastics sucking molding technique of a fascia regenerated leather epidermis, it is characterised in that including:
The thermoplastic synthetic fiber of the skin-core structure that mass fraction is 8%~20% is blended, through non-woven fabrics craft system in corium fabric Obtain corium fabric regenerated leather;
The corium fabric regenerated leather coiled strip prepared is carried out uncoiling with PU film roll material, sprawls;
Precisely temperature control thermal regeneration leather and the sheet material of PU;
The sheet edge of regenerated leather and PU is fixed;
Vacuum suction moulding;
Cooling, obtains the automotive instrument panel skins of molding;
Molded automotive instrument panel skins is cut and waste material rolling.
2. technique as claimed in claim 1, it is characterised in that the actual conditions of described technique includes:
(1) exhibition material: regenerated leather and PU film are simultaneously fed into the exhibition material station of vacuum suction moulding equipment, to its uncoiling, and pass Deliver to heating station, select the PU film without decorative pattern with pre-respectively according to female mould forming method is different with the moulding process of male mould forming method The PU film of decorative pattern processed;
(2) precisely temperature control heating: heating station is made up of matrix form heating unit, and this station carries out subregion to pre-formed sheet material Accurate temperature controlling heating, according to the difference of regenerated leather sheet material different parts deflection, on-demand adjustment heating-up temperature;Regenerate at strip The axis direction of leather gives material compensation;
(3) edge of pre-formed sheet material is fixed: the sheet material after heated is immediately transferred to vacuum suction moulding station, and by four limits Fixing, the bottom from vacuum suction moulding room blasts hot-air subsequently, makes regenerated leather be in one before plastics sucking moulding and upwards heaves State;
(4) vacuum suction moulding: instrument panel surfaces mould rises, is formed between pre-formed sheet material and mould and seals Space, blasts hot-air in the stopping of vacuum suction moulding indoor, and rapidly by the confined space evacuation between mould and sheet material, Post in specific mold wheel profile surface by after its deformation of an atmospheric pressure official post on sheet material two sides;
(5) molded epidermis and the cooling of mould: after treating that vacuum suction moulding process terminates, enter from type epidermis top Row air blast cools down so that instrument panel surfaces quickly cools down with mould;
(6) cutting of molded instrument panel surfaces and waste material rolling: trim panel epidermis cutting tool is positioned at above mould, After instrument panel surfaces has cooled down, die-cutting rule lands, and completes cutting;Subsequently the instrument panel surfaces of well cutting is taken off, molding Waste material moves forward and rolling.
3. technique as claimed in claim 2, it is characterised in that the cortex fusing point of described skin-core structure thermoplastic synthetic fiber compares core Layer fusing point is low at least 20 DEG C, and cortex melting temperature is 70~130 DEG C.
4. technique as claimed in claim 2, it is characterised in that described skin-core structure thermoplastic synthetic fiber is for having skin-core structure 4080 fibers, N720 fiber type, ES fiber etc., preferably 4080 fibers.
5. technique as claimed in claim 2, it is characterised in that the length of corium fabric between 30~60mm, described corium The thickness of regeneration leather is 0.8~1.5mm;
Or the thickness of described polyurethane (PU) film accounts for the 10~40% of sheet material integral thickness.
6. technique as claimed in claim 2, it is characterised in that in step (2), described matrix form heating system concrete The quantity of size and heating unit can be adjusted according to molding equipment and moulding process required precision;
Described regenerated leather is maintained at 110~140 DEG C with the average heating-up temperature of PU sheet material, and regional area can be according to deflection regulation and control tool Body heating-up temperature is in the range of 100~160 DEG C.
7. technique as claimed in claim 2, it is characterised in that in step (3), described in blast the temperature of hot-air be 80~100 DEG C, The persistent period that hot-air blasts about 10~25s.
8. technique as claimed in claim 2, it is characterised in that in step (4), the vacuum of described vacuum forming process sets Being set to-0.07~-0.1MPa, the pumpdown time is 15~30s;Described vacuum plastic-absorbing forming mould may select former or formpiston.
9. technique as claimed in claim 2, it is characterised in that step (5) described cooldown rate is 10~20 DEG C/min, cold But, after, products temperature is down to 30~40 DEG C.
10. a vacuum suction moulding device for fascia regenerated leather epidermis, inhales including conveying mechanism, heating arrangements, vacuum Molded mechanism and control system, it is characterised in that described conveying mechanism sequentially passes through heating arrangements, vacuum suction moulding mechanism; Described control system is connected with conveying mechanism, heating arrangements, vacuum suction moulding mechanism respectively by controlling circuit;Described conveying Mechanism is provided with registration roller, conveying deflector roll and conveyer belt;The animal skins regeneration of conveying is removed from office and PU film by described heating arrangements Sheet material carries out accurate temperature control heating;Described vacuum suction moulding mechanism makes described regenerated leather and PU sheet material closely be pasted on mould.
CN201610462817.XA 2016-06-23 2016-06-23 The vacuum plastics sucking molding technique and device of the regenerated leather epidermis of fascia Active CN105946206B (en)

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CN110576585A (en) * 2019-09-09 2019-12-17 嘉兴海智自动化设备有限公司 single-station sleeve cylinder forming machine
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CN114434777A (en) * 2022-01-28 2022-05-06 东风延锋汽车饰件系统有限公司 Skin composite forming device and forming method thereof and soft instrument board forming method

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CN114434777A (en) * 2022-01-28 2022-05-06 东风延锋汽车饰件系统有限公司 Skin composite forming device and forming method thereof and soft instrument board forming method

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