CN206030369U - Polyurethane foam spare and children's safety seat of preparation thereof - Google Patents
Polyurethane foam spare and children's safety seat of preparation thereof Download PDFInfo
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- CN206030369U CN206030369U CN201620563621.5U CN201620563621U CN206030369U CN 206030369 U CN206030369 U CN 206030369U CN 201620563621 U CN201620563621 U CN 201620563621U CN 206030369 U CN206030369 U CN 206030369U
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Abstract
The utility model discloses a polyurethane foam spare and children's safety seat of preparing, polyurethane foam spare, including soft bubble tissue, the tissue that hard bubbles, epidermal layer, the epidermal layer with soft bubble tissue fixed connection. Soft bubble tissue is in the same place with the mutually inseparable gomphosis of tissue of hard bubbling, soft bubble tissue forms through the foaming of the soft bubble of polyurethane material, the tissue that hard bubbles through polyurethane and expects that the foaming forms, soft bubble tissue is organized all through the mould shaping with hard bubbling, the preparation method of polyurethane foam spare includes following step: vacuum suction, the soft bubble dnockout of polyurethane, polyurethane hard bubble dnockout, repairment. Children's safety seat includes chair core, chair shell, fixed mounting can be dismantled on the chair shell to the chair core, the chair core includes base and back, base and back are polyurethane foam spare. The utility model discloses good travelling comfort has, very big degree eliminate take for a long time tired feel with travelling comfort not.
Description
Technical field
This utility model is related to child safety seat and manufactures field, especially a kind of polyurethane foam part and its preparation
Child safety seat.
Background technology
Existing child safety seat is typically with cloth set parcel EPS（Expandable polystyrene）Deng vibration-absorptive material and modeling
Materials and parts assembled formation, as the vibration-absorptive materials such as EPS are harder, the cloth set of parcel is again relatively thin, just starts to send out for body is still in
For the child for educating can because of take uncomfortable, agitation is cry and screamed, so as to restfully sit on the seat, in vehicle traveling
This is the behavior of danger close, and its consequence is than safety belt buckling free more very.With sending out for the improvement of people's living standards and traffic system
Reach, self driving trip is more and more usual, the research and development to taking safety and comfort, taking tireless child safety seat for a long time
Just like there is great market prospect and important using value.
Utility model content
For the shortcoming of prior art, this utility model provides the children's safety of a kind of polyurethane foam part and its preparation
Seat, by the technique combined with skeleton by the foaming of polyurethane plastic uptake is applied in child safety seat, it is ensured that what is taken is comfortable
Property.
For achieving the above object, this utility model adopts the technical scheme that polyurethane foam part, including it is soft bubble tissue and
Hard bubble tissue, and the soft bubble tissue is fixedly connected with the tissue that hard bubbles, and the soft bubble tissue is closely entrenched in the tissue that hard bubbles mutually
Together, the soft bubble tissue is formed by the foaming of flexible polyurethane foam material, the tissue that hard bubbles foamed by rigid polyurethane foam material and
Into the soft bubble organizes and hard bubble tissue by mould molding, and the tissue tight of hard bubbling is entrenched in soft bubble tissue, described
Polyurethane foam part also includes epidermal area, and the epidermal area is fixedly connected with the soft bubble tissue.The epidermal area is plastic uptake cloth,
The concrete material of the plastic uptake cloth can be plastic foil, weaving face fabric, leather etc..The flexible polyurethane foam material includes polyhydric alcohol group
Close material and isocyanates combination material, the high pressure of the polyhydric alcohol conjugate material（bar）It is set in 130-140bar, the isocyanates
High pressure（bar）It is set in 110-120bar.Pore, a diameter of 1.0-2.0mm of the pore is offered on upper mould.
In one embodiment of this utility model, the mould includes upper die and lower die, and the lower mould includes the lower mould that foams, described
Upper mould includes mould on soft bubble, hard bubble upper mould, and under the foaming, mould is engaged with mould on the soft bubble, under the foaming mould with it is described
The upper mould that hard bubbles is engaged.Pore, a diameter of 1.0-2.0mm of the pore are offered on mould and the upper mould that hard bubbles on the soft bubble.
Mould is mould on the soft bubble with the difference for hard bubbling upper mould in one embodiment of this utility model, the soft bubble
The upper mould protrusion degree that hard bubbles is high.The first backbone region is provided with the soft bubble on mould, the upper mould that hard bubbles is provided with
Two backbone regions, first backbone region is than protruding 6-9mm at the second backbone region.
In one embodiment of this utility model, when preparing polyurethane foam part, first beaten on mould under foaming according to dnockout path
Upper flexible polyurethane foam material, after soft bubble tissue molding, under mobile foaming, mould is extremely engaged place with the upper mould that hard bubbles, by being arranged on
The injection hole on upper mould that hard bubbles squeezes into rigid polyurethane foam material, and tissue molding of waiting to hard bubble completes the mould of soft bubble tissue and the tissue that hard bubbles
Tool molding.
In one embodiment of this utility model, described hard bubbling is organized as the plastic skeleton of advance comprising, the plastic skeleton with
The Ruan Pao tissue tights are fixedly connected；When preparing polyurethane foam part, the plastic skeleton for completing is fixed to into upper mould first,
Then flexible polyurethane foam material is stamped on lower mould according to dnockout path, close the upper mould with plastic skeleton, completes after die sinking
The mould molding of soft bubble tissue and the tissue that hard bubbles.
The preparation method of polyurethane foam part, comprises the following steps：
Vacuum intake：Epidermal area is tiled on mould, and pushes down the fabric of mould surrounding with the press box on mould, to sending out
The lower mould evacuation of bubble, the appropriate fixed switch for opening press box, enables fabric slowly to be inhaled, until fabric is fitted in completely sending out
The lower mould surface of bubble；
Soft polyurethane foam dnockout：Flexible polyurethane foam material is added in high pressure foaming machine, pressure is set as into 110-
140bar, carries out dnockout using high-pressure foam machine gun head according to predetermined dnockout path in lower mould, and close after having broken material soft bubble
Upper mould, burn close time are 5-8 minutes, are then molded, and complete the preparation of soft bubble tissue；
Hard polyurethane foam dnockout：The lower mould for accommodating soft bubble tissue is moved to into the position corresponding with the upper mould that hard bubbles, is closed
On hard bubble upper mould, the injection hole then reserved by the mould on hard bubbling carries out dnockout, after the rigid polyurethane foam material of setting has been beaten
Close injection hole, and burn close time is 4-7 minutes, is then molded, the preparation of the tissue that completes to hard bubble；
Resulting product is repaired, polyurethane foam part is obtained.
During flexible polyurethane foam material dnockout, flexible polyurethane foam material is heated to 25 DEG C -30 DEG C, and inlet pressure is 0.5-
0.7bar, in 0.4-0.5bar, injection flow is 60g/s-150g/s to the pressure of batch can.Mold temperature is set to 55 DEG C -75 DEG C.
The preparation method of polyurethane foam part, comprises the following steps：
Vacuum intake：Epidermal area is tiled on mould, and pushes down the fabric of mould surrounding with the press box on mould, under
Mould evacuation, the appropriate fixed switch for opening press box, enables fabric slowly to be inhaled, until fabric is fitted in lower mould mould completely
Tool surface；
Plastic skeleton molding：Using injection machine according to plastic skeleton Mold Making plastic skeleton, then by the plastics for obtaining
Skeleton is fixed to and hard bubbles on upper mould, and plastic skeleton when hard bubbling upper mould that closes is located at lower mould and hard bubbles between upper mould；
Soft polyurethane foam dnockout：Flexible polyurethane foam material is added in high pressure foaming machine, pressure is set as 110-140bar,
Dnockout is carried out, close after having broken material the upper mould that hard bubbles, burn close time is 5-8 minutes, is then molded, complete the preparation of soft bubble tissue；
Resulting product is repaired, polyurethane foam part is obtained.
In one embodiment of this utility model, after completing soft polyurethane foam foaming, the clout of gas hole location is removed, patted soft
Bubble surface carries out holes, excludes the gas inside soft polyurethane foam.
Child safety seat, including chair core, chair shell, the chair core is detachably fixed on chair shell, the chair core bag
Base core and backrest core is included, the base core and backrest core are polyurethane foam part；The chair shell includes drain pan and shell on the back, institute
State base core and be detachably fixed with the drain pan and be connected, the backrest core is detachably fixed with the shell on the back and is connected, the drain pan
And by being detachably flexibly connected between shell.The base core is assembled to form the base of chair with the drain pan, the backrest core with
The shell on the back equips the backrest to form chair, can carry out the regulation of angle, height as needed to backrest.
The production method of child safety seat, comprises the following steps：
Step a：Polyurethane foam part and conduct as base core are first obtained by the preparation method of polyurethane foam part
The polyurethane foam part of backrest core；
Step b：According to matching requirements, it is right that the polyurethane foam part as base core and backrest core is screwed in respectively
On the drain pan and shell on the back answered, first base core is assembled in the base body below drain pan by drain pan, then backrest will be installed
The shell on the back of core is assembled in base body, obtains child safety seat；When being made using the tissue that hard bubbles as base core and backrest core
For skeleton when, need the hard polyurethane foam foaming complete 24h after can just be fixed to corresponding drain pan and/or shell on the back
On.
Step c：The child safety seat obtained by step b is fixed on the installing rack in compartment.
This utility model has the advantages that：
Soft bubble+hard bubble is that soft bubble is organized molding first, reserves the path position of the organization need that hard bubbles, then by polyurethane
The material that hard bubbles is expelled on the path reserved in advance, foamed formation polyurethane foam part；Soft bubble+plastic skeleton is first by plastics
Then plastic skeleton is combined to form polyurethane foam part with soft bubble tissue by skeleton forming again.
This utility model will be transmitted to vibrations and impact on child safety seat by soft bubble tissue and fully be inhaled
Receive, the child safety seat that production and processing goes out has good comfortableness again in the case where energy-absorbing is ensured, high degree is eliminated
Feeling of fatigue and discomfort that long-time is taken.
Description of the drawings
Fig. 1 is the foamed system figure of this utility model soft polyurethane foam+hard polyurethane foam；
Fig. 2 is the foamed system figure of this utility model soft polyurethane foam+plastic skeleton；
Fig. 3 is polyurethane plastics suction mould rearview when this utility model adopts hard polyurethane foam for skeleton；
Fig. 4 is polyurethane plastics suction mould side view when this utility model adopts hard polyurethane foam for skeleton；
Fig. 5 is polyurethane plastics suction mould rearview when this utility model adopts plastic skeleton for skeleton；
Fig. 6 is polyurethane plastics suction mould side view when this utility model adopts plastic skeleton for skeleton；
Fig. 7 is the top view that this utility model leans against the lower mould of foaming；
Fig. 8 is a kind of structural representation that this utility model leans against mould on soft bubble；
Fig. 9 is a kind of structural representation that this utility model leans against the upper mould that hard bubbles；
Figure 10 is the three-dimensional structure diagram of mould on the soft bubble of this utility model base；
Figure 11 is the top view that this utility model leans against mould on soft bubble；
Figure 12 is the top view that this utility model leans against the upper mould that hard bubbles；
Figure 13 is that this utility model base hard bubbles upper mould dimensional structure diagram；
Figure 14 is the structural representation that this utility model leans against plastic skeleton；
Figure 15 is the structural representation of the soft bubble tissue of this utility model；
Figure 16 is the structure schematic diagram of this utility model backrest；
Figure 17 is the positive structure schematic of this utility model backrest；
Figure 18 is the schematic illustration of tissue that hard bubbles of this utility model base core；
Figure 19 is a kind of dimensional structure diagram of this utility model base core；
Figure 20 is the structural representation of this utility model base of children safety seat part；
Figure 21 is a kind of dimensional structure diagram of this utility model children's seat.
111st, soft bubble tissue；222nd, hard bubble tissue；100th, epidermal area；1st, plastics suction mould；11st, mould on soft bubble；22nd, under foaming
Mould；33rd, hard bubble upper mould；2nd, pipeline；3rd, press box；5th, injection hole；6th, air compressor machine；7th, compressed air drier；8th, the first protuberance；
9th, the second protuberance；800th, skeleton；900th, plastic skeleton；41st, soft bubble high pressure foaming machine；42nd, hard bubble high pressure foaming machine；400th, gas
Cylinder；500th, frame；13rd, die heater；14th, vacuum pump；15th, cooling-water machine；1a, chair core；200th, chair shell；101st, base core；102nd, lean on
Back of the body core；201st, drain pan；202nd, shell on the back；203rd, base body.
Specific embodiment
Embodiment 1
Polyurethane foam part, including it is soft bubble tissue 111, the tissue 222 that hard bubbles, epidermal area 100, it is described it is soft bubble tissue 111 with
The tissue 222 that hard bubbles is fixedly connected, and the epidermal area 100 is fixedly connected with the soft bubble tissue 111.The epidermal area 100 is suction
Modeling cloth, the concrete material of the plastic uptake cloth can be plastic foil, weaving face fabric, leather etc..The soft bubble tissue 111 and group of hard bubbling
Knit 222 to be closely entrenched togather mutually, the soft bubble tissue 111 is formed by the foaming of flexible polyurethane foam material, the flexible polyurethane
Foam material includes polyhydric alcohol conjugate material and isocyanates combination material；The tissue 222 that hard bubbles is formed by the foaming of rigid polyurethane foam material,
The rigid polyurethane foam material includes polyhydric alcohol conjugate material and isocyanates combination material, the soft bubble tissue 111 and the tissue 222 that hard bubbles
Pass through mould molding；The high pressure of the polyhydric alcohol conjugate material（bar）It is set in 130-140bar, the high pressure of the isocyanates
（bar）It is set in 110-120bar.
Embodiment 2
First, equipment, mould, raw material are prepared
（1）Equipment
The present embodiment skeleton is organized using hard polyurethane foam, prepares the foamed system of polyurethane foam part as shown in figure 1, bag
Include mould 1, control device（Do not indicate）, high pressure foaming machine, cooling-water machine 15, air compressor machine 6, compressed air drier 7, vacuum pump
14th, die heater 13；Wherein high pressure foaming machine includes that soft bubble high pressure foaming machine 41, the high pressure foaming machine 42 that hard bubbles, the mould 1 are fixed
It is arranged in the frame 500, the mould 1 and the pneumatic connection of the control device or electrically connects, in the present embodiment, passes through
Cylinder 400 is controlled to mould 1.The mould 1 is connected with the vacuum pump 14, die heater 13 respectively, the bottom of the mould 1
Portion arranges confined space, and the confined space is connected with the vacuum pump 14, and the mould 1 is internally provided with pipeline 2, described
One end of pipeline 2 is connected with the mould 1, and the other end of the pipeline 2 is connected with the die heater 13.The mould 1
On be also associated with air compressor machine 6, the air compressor machine 6 is connected with the mould by compressed air drier 7.The soft bubble high pressure
Foaming machine 41, the high pressure foaming machine 42 that hard bubbles are connected with the cooling-water machine.
（2）Mould
In the present embodiment, plastics suction mould 1 is controlled by control device, including lower 22, the soft bubble of mould of a foaming
Upper mould 11 and the upper mould 33 that hard bubbles are constituted, and mould is to go out program according to drawing or model by programming softwares such as CAM, by counting
Control machine tooling is completed, and then has been manually done other such as pore, the making of back-off position, heating pipe roads etc., and by Mold polishing
It is smooth.The lower mould 22 of foaming is mould under plastic uptake, and under plastic uptake, mould can be moved left and right（Such as Fig. 3, Fig. 4）.
Lower 22 surface of mould of foaming is covered with the pore of a diameter of Φ 1.0mm, and these pores are to be connected to the lower mould of foaming by copper pipe
The confined space of 22 bottoms, when 22 bottom confined space of mould under foaming is extracted with vacuum pump 14, plastic uptake cloth 100 will be attracted on
Lower 22 surface of mould of foaming, so that reach the effect of plastics sucking moulding.The lower mould 22 of 11, foaming of mould and the upper mould that hard bubbles on soft bubble
Water pipe 2 is provided with inside 33, and mould temperature is kept by 13 heated water re-circulation of die heater.
(3) raw material
Soft bubble A material：Polyhydric alcohol conjugate material CW5585/103 C-A
Soft bubble B material：Isocyanates combination material CW5585/102 C-B
The A that hard bubbles expects：Polyhydric alcohol conjugate material CR8739/107 C-A
The B that hard bubbles expects：Isocyanates combination material CR8739/101 C-B
Can plastic uptake cloth, can plastic uptake leather.
2nd, using hard polyurethane foam as foaming piece skeleton
（1）Confirm raw material
According to manufacturing technique requirent, prepare soft polyurethane foam A, B material（A material are polyhydric alcohol conjugate material, B material are isocyanates
Combination material）, hard polyurethane foam A, B material（A material are polyhydric alcohol conjugate material, B material are isocyanates combination material）, plastic uptake cloth 100 will be soft
Bubble and A, B material that hard bubbles are added separately in two high pressure foaming machines.Soft polyurethane foam A is being expected and is being hard bubbled that A material are added separately to
Before corresponding charging bucket of high-pressure foaming machine, it is necessary to sufficiently stirred, asked with combination material layering caused by eliminating long-term placement
Topic, the generally 24 hours cycle of stirring.Check whether plastic uptake cloth 100 has fold, overlay film not in place, whether leather has substantially little
The situation in hole etc., determines the cutting size of plastic uptake cloth or leather according to product size（Long 750-950mm, wide 650-750mm）, cut out
It is standby after shearing.
（2）Job readiness
Start air compressor machine 6, preset pressure 0.8bar.
High-pressure foam electromechanical source is opened, starts mode of operation, start Hydraulic Station, POL stirrings, ISO stirrings, POL pumps, ISO
A, B material in batch can is heated to 25 DEG C -26 DEG C, notices that material temperature can not be too low by pump, and material temperature is too low to cause the mixing of A, B material not
Fully.Inlet pressure is adjusted in 0.6-0.7bar or so, the pressure of batch can is in 0.4bar or so.In high pressure foaming machine PLC circle
Face carries out data setting, including injection weight（g）, injection flow（g/s）, injection ratio（I/P）, POL high pressure, ISO high pressure etc.,
Then carry out examination dnockout；
The injection flow of soft polyurethane foam high pressure foaming machine 41 is 50g/s-350g/s, further preferred 60g/s-150g/s；
60g/s-150g/s；
The injection flow of hard polyurethane foam high pressure foaming machine 42 is 50g/s-250g/s, further preferred 60g/s-150g/s
60g/s-150g/s；
During examination dnockout, from carrying out on the plastic uptake cloth 100 of same type, check the degree of adhesion of soft polyurethane foam tissue, return
Whether the hardness of elasticity, soft durometer and hard polyurethane foam tissue, toughness etc. meet the requirements, undesirable, readjust,
After reaching process specifications, parameter is confirmed；
Die heater 13 is opened, and mold temperature is kept at 55 DEG C -70 DEG C or so, and mould on needing on the soft bubble mould 11 and hard bubbling
Releasing agent is coated on 33, it is ensured that polyurethane foam will not be sticked in the above；
Open vacuum pump 14.
（3）Vacuum inhales cloth
100 back side of plastic uptake cloth for cutting in advance is tiled to upward and is foamed on mould 22 down, and 22 mould of mould is descended with foaming
On press box 3 push down the plastic uptake cloth of lower 22 surrounding of mould of foaming.
To the lower 22 plastic uptake evacuation of mould of foaming, plastic uptake cloth is slowly inhaled 22 surface of mould under foaming, is pressed lightly on handss, but
Can not be pressed with sharp object by force, easily poke the thin film or leather on cloth, cause foamed material glutinous through thin film or leather
Pore, product rejection are blocked in lower mould, the appropriate fixed switch for opening press box 3 enables plastic uptake cloth slowly to be inhaled, until
Lower 22 surface of mould of foaming is fitted in completely.If the phenomenons such as wrinkle occurs in plastic uptake cloth 100, turn off vacuum switch, again by above-mentioned
Method plastic uptake, lower 22 surface of mould of foaming until which is fitted completely.
（4）Soft polyurethane foam dnockout
High pressure foaming machine " high-low pressure switching " button is opened, POL high pressure is observed（Polyhydric alcohol conjugate material high pressure）（bar）With
ISO high pressure（Isocyanates high pressure）（bar）Pressure, general POL high pressure（bar）It is adjusted to 130-140bar or so, ISO high pressure
（bar）It is adjusted to 110-120bar or so.POL high pressure（bar）With ISO high pressure（bar）Adjusted by the nozzle in pipette tips.
When POL high pressure（bar）With ISO high pressure（bar）Pressure it is stable in 130-140bar and 110-120bar respectively,
Dnockout can be started.
Control high-pressure foam machine gun head, determines dnockout path according to shape of product, and the wherein certain GPRS in dnockout path is beaten
Aloft, allow material automatically toward the principle of lower flowing, control the soft foam material consumption at each position, mould on the soft bubble that closes after having broken material
11, mould 11 on soft bubble sets open time, burn close time preferred 5-6 minutes in advance.Mold periphery is observed whether after matched moulds
There is material to overflow, generally, the soft bubble tissue that mold periphery has the position of material spilling easily goes wrong.Before die sinking,
The soft bubble run out of on 11 pore of mould on soft bubble is cleared up in advance, can effectively prevent pore from being blocked by soft bubble tissue.
After 5 minutes, mould is automatically turned on, and completes the foaming of flexible polyurethane foam material, soft bubble tissue.Cut gas hole location
Clout, patting soft 111 surfaces of bubble tissue with small instruments and tools carries out holes, excludes the gas inside soft bubble tissue 111, checks poly- ammonia
The molding situation of the soft foam material of ester, pays special attention to the reserved scarce material situation hard bubbled on dnockout path, if hard bubbled on dnockout path
Soft bubble lacks material, can cause beat hard bubble when, should be that soft bubble organizes 111 position to be hard bubbled 222 replacement of tissue originally, finally lead
Cause assembly problem.Also need inspection to feel suffocated the problems such as lacking material, pore in addition, lead to if any the position that can lack material, pore etc. according to feeling suffocated
Cross the method for open pore and air drain on mould to solve, the aperture of general upper mould perforate is unsuitable excessive, with Φ 1.0-2.0mm is
Preferably, the aerofluxuss that less aperture can be in cushion mould, moreover it is possible to effectively prevent from substantial amounts of running material.
（5）Hard polyurethane foam dnockout
Under mobile foaming, to the side for having the upper mould 33 that hard bubbles, close mould 22 the upper mould 33 that hard bubbles, and adopts the mould 33 on hard bubbling pre-
The method of 5 dnockout of injection hole for staying breaks the material that hard bubbles, and the upper mould 33 that hard bubbles differs primarily in that polyurethane foam with mould 11 on soft bubble
It is provided with the first protuberance 8 at part frame position on soft bubble on mould 11, on the upper mould 33 that hard bubbles, is provided with the second protuberance 9, first
The position of protuberance 8 and the corresponding tissue that hard bubbles of the second protuberance 9, as 800 position of skeleton of polyurethane foam part.Described first
Second protuberance 9 protrusion 6-8mm, i.e. first protuberance 8 to the second protuberance 9 long 6-8mm of the protuberance 8 than the upper mould 33 that hard bubbles.
Specifically, for example on soft bubble, 11 frame position of mould is highly 12mm, after completing soft steep raising bubble, then product upper skeleton position should
Should be less than periphery 12mm；33 frame position of upper mould that hard bubbles highly is 4mm, then closes and hard bubbles after upper mould 33,800 position of skeleton is also
Leave the high spaces of 8mm and beat rigid polyurethane foam material.As shown in figure 15.
After having broken the material that hard bubbles of setting, the situation of 5 material of injection hole is observed, checks whether that also bubble is run out of, true
Close when recognizing 5 bubble-free of injection hole injection hole.5-6 minute rear molds are automatically turned on, and complete foaming.Check the tissue 222 that hard bubbles
Whether completed state is complete, soft bubble whether have the problems such as being mingled with of rigid polyurethane foam material at the position for organizing 111.A small amount of polyurethane
The available guarded blade utility knife of the material that hard bubbles is pruned.The semi-finished product beaten after hard polyurethane foam material.
（6）Finishing
According to matching requirements, the unnecessary plastic uptake cloth of polyurethane foam part periphery is cropped.
Embodiment 3
First, equipment, mould, raw material are prepared
The present embodiment skeleton adopts plastic skeleton, prepares the foamed system of polyurethane foam part as shown in Fig. 2 including mould
1st, pneumatic means 4, soft bubble high pressure foaming machine 41, injection machine（Do not indicate）, cooling-water machine 15, air compressor machine 6, compressed air drier
7th, vacuum pump 14, die heater 13；The mould 1 is fixedly installed in the frame, the mould 1 and 4 gas of the control device
Dynamic connection is electrically connected, and in this 41 embodiment, mould 1 is controlled by cylinder 400.The mould 1 respectively with it is described
Vacuum pump 14, die heater 13 are connected, and the bottom of the mould 1 arranges confined space, the confined space and the vacuum pump 14
It is connected, the mould 1 is internally provided with pipeline 2, one end of the pipeline 2 is connected with the mould 1, the pipeline 2
The other end is connected with the die heater 13.Air compressor machine 6 is also associated with the mould 1, and the air compressor machine 6 passes through compressed air
Drying machine 7 is connected with the mould.The soft bubble high pressure foaming machine 41 is connected with the cooling-water machine 15.
（2）Mould
In the present embodiment plastics suction mould be also by pneumatic controlling, mould include one hard bubble upper mould 33 and one send out
The lower mould 22 of bubble is constituted, such as Fig. 5, Fig. 6.Lower 22 surface of mould of foaming is covered with the pore of a diameter of Φ 1.0mm, and these pores are by copper pipe
The confined space of lower 22 bottom of mould of foaming is connected to, and when 22 bottom confined space of mould under foaming being extracted with vacuum pump, cloth will
Lower 22 surface of mould of foaming is attracted on, so as to reach the effect of plastics sucking moulding.Hard bubble
Water pipe, keeps mould temperature by die heater heated water re-circulation.
(3) raw material
Soft bubble A material：Polyhydric alcohol conjugate material CW5585/103 C-A
Soft bubble B material：Isocyanates combination material CW5585/102 C-B
Can plastic uptake cloth, can plastic uptake leather, PA66 raw materials
2nd, using plastic skeleton as foaming piece skeleton
（1）Confirm raw material
Require according to production technology list, prepare soft polyurethane foam A, B material（A material are polyhydric alcohol conjugate material, B material are Carbimide.
Ester combination material）, plastic uptake cloth or leather, PA66 raw materials are added to soft bubble A, B material in soft bubble high pressure foaming machine.Due to polyurethane
The self-characteristic of soft bubble A material, before A material to be added to soft bubble charging bucket of high-pressure foaming machine, it is necessary to which A material are sufficiently stirred
Mix, the generally 24 hours cycle of stirring.Check whether 100 thin layer of plastic uptake cloth has fold, overlay film not in place, whether leather has
Substantially the situation of aperture etc., determines the cutting size of plastic uptake cloth according to product size, cuts standby.
（2）Job readiness
Start air compressor machine, preset pressure 0.8bar.
High-pressure foam electromechanical source is opened, starts mode of operation, start Hydraulic Station, POL stirrings, ISO stirrings, POL pumps, ISO
A, B material in batch can is heated to 25 DEG C -26 DEG C, notices that material temperature can not be too low by pump, and material temperature is too low to cause the mixing of A, B material not
Fully.Inlet pressure is adjusted in 0.6-0.7bar or so, the pressure of batch can is in 0.4bar or so.In high pressure foaming machine PLC circle
Face carries out data setting, including injection weight（g）, injection flow（g/s）, injection ratio（I/P）, POL high pressure, ISO high pressure etc.,
Then carry out examination dnockout；
Soft polyurethane foam high pressure foaming machine injection flow is 60g/s-150g/s；
During examination dnockout, from carrying out on the cloth of same type, the degree of adhesion of soft polyurethane foam, resilience, soft or hard is checked
Whether degree etc. meets the requirements, undesirable, readjusts, and after process specifications are reached, confirms parameter；
Die heater is opened, and mold temperature is kept at 55 DEG C -70 DEG C or so, and is coated releasing agent on mould 33 on hard bubbling, really
Protect soft polyurethane foam and will not stick mould 33 on hard bubbling；
Open vacuum pump.
（3）Vac sorb epidermal area
100 back side of plastic uptake cloth for cutting in advance is tiled on lower 22 mould of mould of foaming upward, and with the pressure on mould
Frame pushes down the cloth or leather of mould surrounding, identical with the mode in embodiment 1.
Foam 22 evacuation of lower mould to the plastic uptake that foams, and cloth or leather are slowly inhaled 22 surface of mould under foaming, with handss gently
Pressing, the appropriate fixed switch for opening press box, enables cloth or leather to be gone down by suction, until cloth or leather are fitted in mould table completely
Face.If the phenomenons such as wrinkle occur in cloth or leather, turn off vacuum switch, inhale again cloth or leather as stated above, until completely
Till laminating die surface does not occur wrinkle.
（4）Plastic skeleton molding
The making of plastic skeleton 900, plastic skeleton are completed using injection machine according to plastic skeleton mould.When completing epidermal area
Absorption after, the plastic skeleton 900 for completing is fixed to and is hard bubbled on upper mould 33.
（5）Soft polyurethane foam dnockout
High pressure foaming machine " high-low pressure switching " button is opened, POL high pressure is observed（bar）With ISO high pressure（bar）Pressure,
General POL high pressure（bar）It is adjusted to 130-140bar or so, ISO high pressure（bar）It is adjusted to 110-120bar or so.POL high pressure
（bar）With ISO high pressure（bar）Adjusted by the nozzle in pipette tips.
When POL high pressure（bar）With ISO high pressure（bar）Pressure it is stable in 130-140bar and 110-120bar respectively,
Dnockout can be started.
Control high-pressure foam machine gun head, determines dnockout path according to shape of product, and the certain GPRS in path of dnockout is beaten
Eminence, allows material automatically toward the principle of lower flowing, controls the soft foam material consumption at each position, and close after having broken material the upper mould that hard bubbles
33, burn close time is 5-6 minutes.The material that whether has for observing mold periphery after matched moulds overflows, before die sinking, 77 gas of mould in cleaning
The soft bubble tissue run out of on hole, can effectively prevent pore from being blocked by soft bubble tissue.
After 5 minutes, mould is automatically turned on, and completes the foaming of flexible polyurethane foam material.The clout of gas hole location is cut, with little
Type instrument is patted soft bubble surface and carries out holes, excludes the gas of soft bubble organization internal, checks the molding situation of flexible polyurethane foam material.
Inspection is also needed in addition to feel suffocated the problems such as lacking material, pore, if any can be according to the position for lacking material, pore etc. of feeling suffocated by opening on mould
Solving, the aperture of 33 perforate of upper mould of typically hard bubbling is unsuitable excessive, is advisable with Φ 1.0-2.0mm for the method for pore and air drain, compared with
Little aperture can be in cushion mould aerofluxuss, moreover it is possible to effectively prevent from substantial amounts of running material.
（6）Finishing
According to matching requirements, the unnecessary plastic uptake cloth of polyurethane foam part periphery is cropped.
Embodiment 4
Child safety seat, including chair core 1a, chair shell 200, the chair core 1a is detachably fixed on chair shell 200,
The chair core 100 includes that base core 101 and backrest core 102, the base core 101 and backrest core 102 are above-mentioned preparation method
The polyurethane foam part of preparation.The chair shell 200 includes drain pan 201 and shell on the back 202, the base core 101 and the drain pan 201
Screw is fixedly connected, and the backrest core 102 is fixedly connected with 202 screw of the shell on the back.The base core 101 and the drain pan
201 bases for being assembled to form chair, the backrest core 102 form the backrest of chair with the equipment of the shell on the back 202.Backrest is mounted in bottom
In seat main body 203, backrest and base body 203 are flexibly connected.Backrest can adjust its height and angle up and down.
The production method of child safety seat, comprises the following steps：
Step a：Polyurethane foam part and work as base core 101 are first obtained by the preparation method of polyurethane foam part
For the polyurethane foam part of backrest core 102；
Step b：It is according to matching requirements, the polyurethane foam part as base core 101 and backrest core 102 is solid with screw respectively
It is scheduled on corresponding drain pan 201 and shell on the back 202, base core is assembled to into the base body 203 below drain pan by drain pan 201 first
On, then the shell on the back 202 for being provided with backrest core is assembled in base body 203, obtain child safety seat；Due to rigid polyurethane
Finish and be all-trans in requisition for the time, thus when as base core and backrest core using hard bubble setup action skeleton when, need described
Hard polyurethane foam foaming can be just fixed on corresponding drain pan and/or shell on the back after completing 24h.
The child safety seat produced by the technique of novelty by this utility model, can take advantage of fully child
Seated user obtains comfortable ride experience.
Claims (3)
1. a kind of polyurethane foam part, it is characterised in that including soft bubble tissue and the tissue that hard bubbles, the soft bubble tissue and group of hard bubbling
Knit and be fixedly connected, the soft bubble tissue is closely entrenched togather with the tissue that hard bubbles mutually, the soft bubble tissue is by flexible polyurethane
Foam material foaming is formed, and the tissue that hard bubbles is formed by the foaming of rigid polyurethane foam material, and the soft bubble tissue and the tissue that hard bubbles lead to
Cross mould molding；Also include epidermal area, the epidermal area is fixedly connected with the soft bubble tissue；The mould includes mould with
Mould, the lower mould include the lower mould that foams, and the upper mould includes mould on soft bubble, hard bubble upper mould, mould and the soft bubble under the foaming
Upper mould is engaged, and under the foaming, mould is engaged with the upper mould that hard bubbles.
2. polyurethane foam part as claimed in claim 1, it is characterised in that mould hard bubbles upper mould not with described on the soft bubble
It is that the mould upper mould protrusion degree that hard bubbles is high on the soft bubble with point.
3. a kind of child safety seat, it is characterised in that including chair core, chair shell, the chair core is detachably fixed installed in chair shell
On, the chair core includes that base core and backrest core, the base core and backrest core are polyurethane foam part；The chair shell includes
Drain pan and shell on the back, the base core are detachably fixed with the drain pan and are connected, and the backrest core is detachably fixed with the shell on the back
Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620563621.5U CN206030369U (en) | 2016-06-13 | 2016-06-13 | Polyurethane foam spare and children's safety seat of preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620563621.5U CN206030369U (en) | 2016-06-13 | 2016-06-13 | Polyurethane foam spare and children's safety seat of preparation thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206030369U true CN206030369U (en) | 2017-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620563621.5U Active CN206030369U (en) | 2016-06-13 | 2016-06-13 | Polyurethane foam spare and children's safety seat of preparation thereof |
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| Country | Link |
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| CN (1) | CN206030369U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105856478A (en) * | 2016-06-13 | 2016-08-17 | 杭州发顺实业有限公司 | Polyurethane foaming part, preparation method and child safety seat manufactured from polyurethane foaming part |
-
2016
- 2016-06-13 CN CN201620563621.5U patent/CN206030369U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105856478A (en) * | 2016-06-13 | 2016-08-17 | 杭州发顺实业有限公司 | Polyurethane foaming part, preparation method and child safety seat manufactured from polyurethane foaming part |
| CN105856478B (en) * | 2016-06-13 | 2019-06-18 | 杭州乐檬实业有限公司 | A kind of polyurethane foam part, preparation method and its child safety seat of preparation |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210830 Address after: 315105 building 13, No. 359, Chengxin East Road, Yinzhou District, Ningbo City, Zhejiang Province Patentee after: Butong safety technology (Ningbo) Co.,Ltd. Address before: 311241 Dongfang village, Guali Town, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee before: HANGZHOU YUEMENG INDUSTRY Co.,Ltd. |
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| TR01 | Transfer of patent right |