CN101396857B

CN101396857B - Synthetic resin internal foam molding machine and method

Info

Publication number: CN101396857B
Application number: CN2007101615130A
Authority: CN
Inventors: 古正煇
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-24
Filing date: 2007-09-24
Publication date: 2012-04-25
Anticipated expiration: 2027-09-24
Also published as: CN101396857A

Abstract

The invention relates to manufacturing of a foaming and molding product generally and particularly discloses a foaming and molding device of internal expansion of a mold of synthetic resin. The mold comprises an upper mold and a lower mold; wherein the upper mold is sealed by a sealing device and is movably supported on a lower shell of a steam pot; the internal part of the steam pot is divided into an upper cavity and a lower cavity in an air tight mode; the steam in the upper cavity can enter a mold cavity only by a contact air gap which is used for allowing the steam to enter the mold cavity from the upper cavity; and the steam entering the mold cavity can enter the lower cavity only by a contact air gap which is used for allowing the steam to enter the lower cavity from the mold cavity. Compared with the existing foaming and molding device of internal expansion of a mold of synthetic resin, the device has simple structure, low manufacturing cost and convenient operation and can save energy sources greatly. The invention also discloses an expanded foam molding method in a mold of synthetic resin by adopting the device.

Description

The internal foam molding machine of synthetic resin and method

Technical field

The manufacturing of relate generally to expanded molded article of the present invention is specifically related to internal foam molding machine and method thereof that material bead that the thermoplasticity synthetic resin of a kind of use such as polyolefin and polystyrene processes forms expanded molded article.

Background technology

CN1295507A discloses a kind of internal foam molding machine and method of synthetic resin.The internal foam molding machine and the method for disclosed synthetic resin are as shown in Figure 7.This internal foam molding machine 1 comprises a core mould 2 and a swaging die 3; Be used for material bead 5 is filled into the bead filling device of die cavity 4; Be used to reduce the decompressor of die cavity 4 internal pressures; Compressed air is infeeded the compressed air supply system in the die cavity 4; The cooling device of steam providing apparatus and this expanded molded article of cooling, wherein core mould 2 is moulds of one group of positioned opposite with swaging die 3, steam providing apparatus is used for being filled in material bead 5 and expansion and melt raw material bead 5 in the die cavity 4 through Steam Heating.

Core mould 2 is respectively installed on the shell 12 with swaging die 3, and shell 12 has the rear side that a

framework

10 and 11, one group of first chamber 13 of a backboard and second chamber 14 are respectively formed at core mould 2 and swaging die 3.

First chamber 13 and second chamber 14 are connected to steam supply pipe 15 and air supply pipe 16 through operating valve SV1 and SV2 and switch valve SWV1 and SWV2 respectively; Simultaneously, be connected to discharge pipe 17 and relief pipe 18 through dump valve DV1 and DV2 and switch valve SWV3 and SWV4 respectively with a vavuum pump 19.In first and

second chambers

13 and 14, be respectively arranged with one have a plurality of nozzles 20 be used for be connected to a cooling water tube 22 to nozzle assembly 21, two nozzle assemblies 21 of the back surface spray cooling water of core mould 2 and swaging die 3 through cooling water valve CV1 and CV2.

A kind of peculiar structure is that the first opening 30a, the 30b that lead to die cavity 4 is formed on the moulding section that core mould 2 and swaging die 3 are used for moulding; This part is used for the not signal portion of this expanded molded article of moulding; And be provided with the interface channel that is used for the first opening 30a, 30b are connected to operate outside pipe 15-18; Thereby through operation element valve SV3-SV6, drain valve DV3-DV4 and switch valve SWV1-SWV4, these working fluids can be independently from a plurality of first opening 30a towards die cavity 4,30b supply or discharge such as steam and compressed air.The position that is used to form the first opening 30a, 30b can be divided into three types basically: the joint of core mould 2 and swaging die 3 or near formation, appurtenances such as the part that is exposed to die cavity 4 of fill assembly 23 and knockout pin 24 near formation and above two types combination.

In first type internal foam molding machine 1; The slit shape first opening 30a and the 30b that leads to die cavity 4 partly is provided with along the joint of core mould 2 and swaging die 3; Mould internal channel 31a arranges as the interface channel that is connected the first opening 30a and 30b and operate outside pipe 15-18 with 32b with 31b and inner tube 32a; Wherein on core mould 2 and swaging die 3, there is not passage to form, thereby when mould is closed, die cavity 4 and two

chambers

13 and 14 airtight isolation; Simultaneously, the first opening 30a and the 30b that lead to operate outside pipe 15-18 form between core mould 2 and swaging die 3.According to above-mentioned structure, above mentioned preheating and exhaust air technique and to the fusing heating process of material bead 5 can below these first opening 30a of employing and the method for 30b carry out.In preheating and exhaust air technique; Pressure in the die cavity 4 is through reducing pressure and directly reducing from the first opening 30a or the first opening 30b exhaust; The steam that is used for preheating then directly is fed to die cavity 4 in the same way; And in the fusing heating process, the steam that is in fusion temperature directly is fed to the material bead 5 in the die cavity 4 from the first opening 30a or the first opening 30b.In order to prevent that the first opening 30a and 30b from being stopped up by material bead 5; The first opening 30a and 30b must be the external diameter size of the material bead 5 that will fill at the A/F of die cavity 4 sides, 1-10mm or lower, and do not have burr and overlap in order to machine expanded moldings subtly; The width of opening should be as much as possible little; If but the width of opening is too little, the current resistance of working fluid increases, so 0.1-1.5mm pairs of openings width is suitable.

The internal foam molding machine of this synthetic resin; Owing to will between core mould 2 and swaging die 3, form the first opening 30a and 30b and mould internal channel 31a and 31b; The inner tube 32a and the 32b that will between the framework 10 of core mould 2 and shell 12, install and fix; Thereby, make mold structure complicated, manufacturing cost increases.In addition because the core mould of mould 2 is fixedly mounted on respectively in the left shell and right shell body of shell 12 with swaging die 3, repair or more during mold exchange dismounting difficult.

The mould internal foam forming method of this synthetic resin; Because the core mould 2 and the swaging die 3 of mould are fixedly mounted on respectively in the left shell and right shell body of shell 12, before the expanded molded article demoulding mould are cooled off and can only carry out at shell 12 through the back surface spray cooling water to core mould 2 and swaging die 3.When being filled in material bead 5 and expansion and the melt raw material bead 5 in the die cavity 4 through Steam Heating; Make shell 12 and shell 12 inside be in the condition of high temperature; Shell 12 in, through the back surface spray cooling water to core mould 2 and swaging die 3 mould being cooled off before the expanded molded article demoulding makes shell 12 and shell 12 inside be in the condition of high temperature; When being filled in material bead 5 and expansion and the melt raw material bead 5 in the die cavity 4 through Steam Heating once more; Make shell 12 and shell 12 inside be in the condition of high temperature once more ..., carry out heating and cooling in shell 12 inside so repeatedly, caused the huge waste of the energy.

Summary of the invention

The present invention is in order to solve the internal foam molding machine complex structure of existing synthetic resin, manufacturing cost high with the problem of repairing or change the mold attaching/detaching difficulty, a kind of internal foam molding machine of novel synthetic resin is provided.

The present invention provides a kind of mould internal foam forming method of synthetic resin of novelty for the mould internal foam forming method that solves existing synthetic resin causes the problem of energy huge waste.

For addressing the above problem, the internal foam molding machine of synthetic resin of the present invention comprises the mould of a vapor can and in vapor can; Vapor can comprises a upper shell, the sealing device of a lower house and between upper shell and lower house faying face; It is characterized in that; Mould comprises a patrix and a counterdie; Patrix seals and is bearing in movably on the lower house of vapor can through a sealing device; Vapor can inside is divided into a upper plenum and cavity once airtightly, and the steam in the upper plenum can only be through being used to allow steam to get in the mold cavity from the contact air gap that upper plenum gets into mold cavity, and the steam that gets in the mold cavity can only get into down in the cavity through being used to allow steam to get into down the contact air gap of cavity from mold cavity.

The internal foam molding machine of synthetic resin of the present invention because patrix is through sealing device sealing and be bearing in movably on the lower house of vapor can, is divided into a upper plenum and cavity once with vapor can inside airtightly; It or not internal foam molding machine as the synthetic resin of prior art; Mould is fixedly connected with vapor can through template, and like this, the steam of upper plenum can not get into cavity down from the mould outside on the one hand; Can only get into cavity down through the die cavity of mould; Thereby guarantee the material bead in the die cavity is effectively heated, on the other hand, not only simplified the structure of device; And, make mould taken out from vapor can and mould is put into vapor can to become convenient at the needs stripping operation with in die cavity during the filling material bead; Because; Mould has the contact air gap that is used to allow steam to get into mold cavity from upper plenum and allows steam to get into the air gap that contacts of following cavity from mold cavity with being used to; It or not internal foam molding machine as the synthetic resin of prior art; First opening with certain width must be set in mould specially and first opening is connected to internal pipeline and second opening on the external steam service line and second opening is connected to the internal pipeline on the external steam service line; Like this, not only at the needs stripping operation with in die cavity during the filling material bead, make mould taken out from vapor can and mould is put into vapor can to become convenient; And simplified the structure that installs significantly, manufacturing cost is reduced greatly.

The internal foam molding machine of synthetic resin of the present invention; Patrix is last whole mould; Counterdie is following whole mould, and the contact air gap that is used to allow steam to get into mold cavity from upper plenum forms between the surface at last whole mould and following whole mould contacting in mold cavity.

The internal foam molding machine of synthetic resin of the present invention; Patrix is last whole mould; Counterdie is following whole mould, is used to allow steam gets into cavity down from mold cavity contact air gap at last whole mould with form between the contact surface of the part that combines of integral body outside mold cavity down.

The internal foam molding machine of synthetic resin of the present invention; Patrix is last combination die; Counterdie is following whole mould, is used to allow contact air gap that steam gets into mold cavity from upper plenum between the contact surface of the part that last combination die combines and/or at the part of last combination die, to form between the surface with time whole mould contacting in mold cavity.

The internal foam molding machine of synthetic resin of the present invention; Patrix is last combination die; Counterdie is following whole mould, is used to allow steam gets into cavity down from mold cavity contact air gap between the contact surface of the part of last combination die and the following part that combine of whole mould outside mold cavity, to form.

The internal foam molding machine of synthetic resin of the present invention; Patrix is last combination die; Counterdie is following combination die, be used to allow contact air gap that steam gets into mold cavity from upper plenum between the contact surface of the part that last combination die combines and the part of last combination die form between the surface with part the contacting in mold cavity of following combination die.

The internal foam molding machine of synthetic resin of the present invention; Patrix is last combination die; Counterdie is following combination die, is used to allow steam gets into cavity down from mold cavity contact air gap forming between the contact surface of the part that combination die down combines and between the contact surface of the part of last combination die and the part that combines of part outside mold cavity of following combination die.

The internal foam molding machine of synthetic resin of the present invention; The vapor can upper shell is as last vapour jacket housing; The inboard, lower surface of its adpting flange has an annular groove; The adpting flange of patrix bottom is fixedly mounted in the annular groove of vapour jacket housing hermetically; Formation one has the patrix of last vapour jacket housing, and the conduct of vapor can lower house is the vapour jacket housing down, and the inboard, upper surface of the adpting flange of following vapour jacket housing has an annular groove; The adpting flange of counterdie bottom is fixedly mounted on play in the annular groove of inboard, upper surface of adpting flange of vapour jacket housing hermetically; Formation one has the counterdie of following vapour jacket housing, and the upper surface of the adpting flange of counterdie bottom has an annular lip, and the lower surface of the adpting flange of patrix bottom contacts with the upper surface of annular lip; Have and be used to allow steam to get into the contact air gap of cavity down from mold cavity, the adpting flange of counterdie bottom has a plurality of connections and is used to allow steam to get into the contact air gap of cavity and the through hole of following cavity down from mold cavity.

The internal foam molding machine of synthetic resin of the present invention; The contact air gap of cavity allows the contact air gap of steam from following cavity entering mold cavity as being used to be used to allow steam to get into down from mold cavity, and the contact air gap that is used to allow steam to get into mold cavity from upper plenum allows steam to get into the contact air gap of upper plenum from mold cavity as being used to.

The mould internal foam forming method of the synthetic resin of the internal foam molding machine of employing of the present invention synthetic resin of the present invention; It is characterized in that; Get into pipeline from external steam and get into the steam in the vapor can upper plenum; The contact surface of the part that only combines through last combination die has is used for the die cavity that contact air gap that steam gets into the die cavity of mould from the upper plenum of vapor can gets into mould; Air in the space between the material bead in the die cavity of discharge mould also makes material bead be heated, expand and melt; Become expanded molded article; The contact surface of the part that the air in the space between the material bead in the die cavity of mould and steam only combine through combination die down, upward the steam that is used for that has of the contact surface of the part that combines of contact surface or counterdie and the last combination die of the part that combines of combination die and following combination die enters down cavity, entering external steam discharge pipe from the air gap that contacts that the die cavity of mould is discharged to down cavity.

The mould internal foam forming method of the synthetic resin of the internal foam molding machine of employing of the present invention synthetic resin of the present invention; Owing to get into the steam in the vapor can upper plenum; Only through being used for steam gets into mould from the contact air gap of the die cavity of the upper plenum entering mould of vapor can die cavity; Air in the space between the material bead in the die cavity of mould and steam enter down cavity through being used for steam from the air gap that contacts that the die cavity of mould is discharged to down cavity; In this process, the air in the space between the material bead in the die cavity is discharged automatically, penetrates mobile in the space of steam between material bead in the die cavity; Make material bead be heated, expand and melt; Become high-quality expanded molded article, operating process is very simple, is not the mould internal foam forming method as the synthetic resin of prior art; At first to close and open a plurality of external valves simultaneously; Make steam get into the die cavity of mould from the external steam service line of installing a side through internal pipeline and first opening with certain width and second opening, the air that orders about in the space between the material bead in the die cavity of mould is discharged in the die cavity of mould through internal pipeline and first opening with certain width and the entering of second opening through the external steam service line of device opposite side in the die cavity of mould, and then closes and open a plurality of external valves simultaneously; Make steam pass through internal pipeline and have first opening of certain width and the die cavity that second opening gets into mould simultaneously from the external steam service line of device both sides; Make material bead be heated, expand and melt, become expanded molded article, in heating raw bead process; Steam does not penetrate in the space between material bead mobile; Therefore heats is poor, can not guarantee the quality of expanded molded article, and operating process is very complicated.During the expanded molded article demoulding; Can mould be taken out in vapor can, cool off separately, vapor can is not cooled; Directly carry out next operation; Not that portion carries out heating and cooling in the enclosure repeatedly, has caused the huge waste of the energy as the mould internal foam forming method of the synthetic resin of prior art.

The mould internal foam forming method of the synthetic resin of the internal foam molding machine of employing of the present invention synthetic resin of the present invention; Can before in the upper plenum of vapor can, supply with steam, get into pipeline from outside hot water and in the vapor can upper plenum, supply with hot water from external steam entering pipeline.

The mould internal foam forming method of the synthetic resin of the internal foam molding machine of employing of the present invention synthetic resin of the present invention; Get into pipeline from external steam and get into the steam in the cavity under the vapor can; Can only be through being used to allow steam to get in the mold cavity from the contact air gap that following cavity gets into mold cavity; The steam that gets in the mold cavity can only get into the external steam discharge pipe again through being used to allow steam to get in the upper plenum from the contact air gap that mold cavity gets into upper plenum.

The mould internal foam forming method of the synthetic resin of the internal foam molding machine of employing of the present invention synthetic resin of the present invention; Before in the following cavity of vapor can, supplying with steam, get into pipeline from outside hot water and under vapor can, supply with hot water in the cavity from external steam entering pipeline.

Description of drawings

Fig. 1 is the structural representation of first embodiment of internal foam molding machine of synthetic resin of the present invention;

Fig. 2 is the structural representation of second embodiment of internal foam molding machine of synthetic resin of the present invention;

Fig. 3 is the structural representation of the 3rd embodiment of internal foam molding machine of synthetic resin of the present invention.

Fig. 4 is the structural representation of the 4th embodiment of internal foam molding machine of synthetic resin of the present invention;

Fig. 5 is the structural representation of the 5th embodiment of internal foam molding machine of synthetic resin of the present invention;

Fig. 6 is the structural representation of the 6th embodiment of internal foam molding machine of synthetic resin of the present invention;

Fig. 7 is the internal foam molding machine structural representation of existing synthetic resin.

The specific embodiment

Describe the specific embodiment of the present invention below in conjunction with accompanying drawing, the internal foam molding machine and the method for synthetic resin of the present invention is further described.

Referring to Fig. 1, the internal foam molding machine 100 of the synthetic resin of first embodiment of the invention comprises a vapor can 110 and a mould 150.

Vapor can 110 comprises a upper shell 111, sealing gasket or the sealing ring 113 of a lower house 112 and between upper shell 111 and lower house 112 faying faces.

Upper shell 111 top seals have a roof 111a, and bottom-open has an adpting flange 111b.Roof 111a has a centre bore 111c.Centre bore 111c is communicated with a hot water supply pipeline 114 and a steam suppling tube line 115.Has a valve 114a on the hot water supply pipeline 114.Has a valve 115a on the steam suppling tube line 115.

Lower house 112 open-tops have an adpting flange 112b, and bottom lock has a diapire 112a.Diapire 112a has a centre bore 112c.Centre bore 112c is communicated with a hot water discharge pipe's line 116 and a vapour-discharge tube line 117.Has a valve 116a on hot water discharge pipe's line 116.Has a valve 117a on the vapour-discharge tube line 117.

Mould 150 comprises on one combination die 151 and combination die 152 once.

Last combination die 151 comprises a top board 151a, an outer cylindrical casing 151b and at least one interior barrel shell 151c.Top board 151a has at least one through hole 151d.Interior barrel shell 151c open-top, the through hole 151d of the size of opening and top board 151a adapts.The diapire of interior barrel shell 151c has a passage 151m.Outer cylindrical casing 151b top and bottom are all opened wide, and the bottom has an adpting flange 151e.Through general turning or processed the top end 151h of the lower surface 151f of top board 151a, the top end 151g of outer cylindrical casing 151b, interior barrel shell 151c and the lower surface 151j of the adpting flange 151e bottom bottom end face and the outer cylindrical casing 151b are processed into the plane.With a plurality of bolts or screw 153 top board 151a and outer cylindrical casing 151b and interior barrel shell 151c are combined; The lower surface 151f of top board 151a contacts with the top end 151h of the top end 151g of outer cylindrical casing 151b and interior barrel shell 151c, has contact air gap 151p.

Following combination die 152 comprises an Outer Bottom Plating 152a, an inner bottom plating 152b and at least one interior barrel shell 152c.It is inner that inner bottom plating 152b is positioned at Outer Bottom Plating 152a.Inner bottom plating 152b has a upper flange 152j.Interior barrel shell 152c bottom-open.Through general turning or processed the upper surface of the upper flange 152j of the upper surface 151g of the upper surface 152f of Outer Bottom Plating 152a, inner bottom plating 152b, inner bottom plating 152b and the bottom end face 152h of interior barrel shell 152c are processed into the plane.With a plurality of bolts or screw 154 Outer Bottom Plating 152a and inner bottom plating 152b and interior barrel shell 152c are combined; The upper surface 152f of Outer Bottom Plating 152a and the upper surface 152g of inner bottom plating 152b contact with the bottom end face 152h of interior barrel shell 152c, have contact air gap 152p.Distance between the inward flange of the outward flange of inner bottom plating 152b and Outer Bottom Plating 152a adapts with the opening of interior barrel shell 152c bottom.

Adpting flange 151e and the Outer Bottom Plating 152a of following combination die 152 that will go up the outer cylindrical casing 151b bottom of combination die 151 with a plurality of bolts or screw combine; The lower surface 151j of adpting flange 151e contacts with the upper surface 152f of Outer Bottom Plating 152a, has contact air gap 158.The upper surface of the upper flange 152j of inner bottom plating 152b contacts with the lower surface of interior barrel shell 151c, has contact air gap 159.

The lower surface 151j of the adpting flange 151e of the outer cylindrical casing 151b of the mould that fills full material bead 180 in the die cavity 150 bottom is bearing in through a sealing gasket or sealing ring 118 on the upper surface of adpting flange 112b at housing lower half 112 tops of vapor can 110; The adpting flange 111b of upper shell 111 bottoms is bearing in through sealing gasket or sealing ring 113 on the upper surface of adpting flange 112b at lower house 112 tops of vapor can 110; With a plurality of bolts 119 upper shell 111 and lower house 112 are installed together; Thereby, the internal foam molding machine 100 of the synthetic resin of formation first embodiment of the invention.

Referring to Fig. 1, the mould internal foam forming method of the synthetic resin of the first embodiment of the invention of the internal foam molding machine 100 of the synthetic resin of employing first embodiment of the invention is following:

Close valve 114a and the valve 116a on hot water discharge pipe's line 116 on the hot water supply pipeline 114; Open valve 115a and the valve 117a on the vapour-discharge tube line 117 on the steam suppling tube line 115; At this moment; Steam gets into vapor can 110 inside from steam suppling tube line 115 through the centre bore 111c of the roof 111a of the upper shell 111 of vapor can 110; Because the existence of sealing gasket or sealing ring 114; Steam can not directly get into cavity 140 down from the upper plenum 120 of vapor can 110, but after being full of upper plenum 120, through contact air gap 151p and the die cavity that contacts air gap 159 entering moulds 150; Make the air process contact air gap 152p in the space between the interior material bead 180 of die cavity and contact the following cavity 140 that air gap 158 gets into vapor cans 110; Steam passes the space between the material bead 180 in the die cavity, through contact air gap 152p and the following cavity 140 that contact air gap 158 entering vapor cans 110, then through the centre bore 112c entering vapour-discharge tube line 117 of the diapire 112a of the lower house 112 of vapor can 110 and discharge.In this process, the material bead 180 that fills in die cavity is heated, expands and melts, and becomes expanded molded article.

In said process because the space between the material bead 180 in the die cavity is full of air before steam gets in the die cavity, in steam gets into die cavity after; On the one hand, air will pass through contact air gap 152p and contact air gap 158 discharge die cavities, on the other hand; The thermal conductivity of air is relatively poor, and this just causes 180 heating of the material bead in the die cavity inhomogeneous, influences the quality of expanded molded article; In addition, taken away the part heat, cause the waste of heat energy by steam-heated air.For this reason; Can at first open valve 114a and the valve 116a on hot water discharge pipe's line 116 on the hot water supply pipeline 114; Valve 115a on the steam off supply pipeline 115 and the valve 117a on the vapour-discharge tube line 117; At this moment, hot water gets into vapor can 110 inside from hot water supply pipeline 114 through the centre bore 111c of the roof 111a of the upper shell 111 of vapor can 110, because the existence of sealing gasket or sealing ring 114; Hot water can not directly get into cavity 140 down from the upper plenum 120 of vapor can 110; But after being full of upper plenum 120,, pass the space between the material bead 180 in the die cavity through contact air gap 151p and the die cavity that contacts air gap 159 entering moulds 150; Through contact air gap 152p and the following cavity 140 that contact air gap 158 entering vapor cans 110, then through the centre bore 112c entering vapour-discharge tube line 117 of the diapire 112a of the lower house 112 of vapor can 110 and discharge.Then; Close valve 114a and the valve 116a on hot water discharge pipe's line 116 on the hot water supply pipeline 114, open valve 115a and the valve 117a on the vapour-discharge tube line 117 on the steam suppling tube line 115, because the space between the material bead 180 in the die cavity is full of hot water before in steam gets into die cavity; The thermal conductivity of water is better; After in steam gets into die cavity, the hot water in the space between the material bead 180 is almost vaporized rapidly after the vapor absorption little heat simultaneously, and material bead 180 is evenly heated; The quality of expanded molded article is improved, and the heat of steam is fully used.

Referring to Fig. 2, the internal foam molding machine 200 of the synthetic resin of second embodiment of the invention comprises a vapor can 210 and a mould 250.

Vapor can 210 comprises a upper shell 211, sealing gasket or the sealing ring 213 of a lower house 212 and between upper shell 211 and lower house 212 faying faces.

The upper shell 211 of vapor can 210, lower house 212 and sealing ring 213 are identical with sealing ring 113 structures with upper shell 111, the lower house 112 of the vapor can 110 of the internal foam molding machine 100 of the synthetic resin of first embodiment of the invention, no longer describe.

Mould 250 comprises on one combination die 251 and combination die 252 once.

Last combination die 251 comprises two

top board

251a and 251b, two outer cylindrical casing 251c and 251d.The sides adjacent of two

top board

251a and 251b respectively has a flange 251e and a 251f.Through general turning or processed

flange

251e and 251f opposing end faces are processed into the plane.With a plurality of bolts or screw 253 two

top board

251a and 251b are combined,

flange

251e and 251f opposing end faces contact, and have contact air gap 251p.Two outer

cylindrical casing

251c and 251d respectively have the adpting flange 251g at a top and the adpting flange 251h and the 251k of 251j and bottom.Through general turning or processed the adpting flange 251g at lower surface, two outer cylindrical casing 251c and the 251d top of two

top board

251a and 251b and the upper surface of 251j and the adpting flange 251h of bottom and the lower surface of 251k are processed into the plane.With a plurality of bolts or screw 254 two

top board

251a and 251b and outer cylindrical casing 251c are combined, the lower surface of two

top board

251a and 251b contacts with the upper surface of the adpting flange 251g at the top of outer cylindrical casing 251c, has contact air gap 251q.With a plurality of bolts or screw 255 outer cylindrical casing 251c and outer cylindrical casing 251d are combined, the lower surface of the adpting flange 251h of the bottom of outer cylindrical casing 251c contacts with the upper surface of the adpting flange 251j at the top of outer cylindrical casing 251d, has contact air gap 251r.

Following combination die 252 comprises barrel shell 252c in a base plate 252a and.Interior barrel shell 252c bottom-open.Through general turning or processed the upper surface of base plate 252a and the bottom end face of interior barrel shell 252c are processed into the plane.With a plurality of bolts or screw 256 base plate 252a and interior barrel shell 252c are combined, the upper surface of base plate 252a contacts with the bottom end face of interior barrel shell 252c, has contact air gap 252p.Base plate 252a has through hole.The opening of the through hole of base plate 252a and interior barrel shell 252c bottom adapts.

Adpting flange 251k and the base plate 252a of following combination die 252 that will go up the outer cylindrical casing 251d bottom of combination die 251 with a plurality of bolts or screw 257 combine, and the lower surface of adpting flange 251k contacts with the upper surface of base plate 252a, has the air gap 258 of contact.

The lower surface of the adpting flange 251k of the outer cylindrical casing 251d of the mould that fills full material bead 280 in the die cavity 250 bottom is bearing in through a sealing gasket or sealing ring 218 on the upper surface of adpting flange 212b at housing lower half 212 tops of vapor can 210; The adpting flange 211b of upper shell 211 bottoms is bearing in through sealing gasket or sealing ring 213 on the upper surface of adpting flange 212b at lower house 212 tops of vapor can 210; With a plurality of bolts 219 upper shell 211 and lower house 212 are installed together; Thereby, the internal foam molding machine 200 of the synthetic resin of formation first embodiment of the invention.

The mould internal foam forming method of the synthetic resin of the second embodiment of the invention of the internal foam molding machine 200 of the synthetic resin of employing second embodiment of the invention is identical with the mould internal foam forming method of the synthetic resin of the first embodiment of the invention of the internal foam molding machine 100 of the synthetic resin that adopts first embodiment of the invention, no longer describes.

Referring to Fig. 3, the internal foam molding machine 300 of the synthetic resin of third embodiment of the invention comprises a vapor can 310 and a mould 350.

Vapor can 310 comprises a upper shell 311, sealing gasket or the sealing ring 313 of a lower house 312 and between upper shell 311 and lower house 312 faying faces.

The upper shell 311 of vapor can 310, lower house 312 and sealing ring 313 are identical with sealing ring 113 structures with upper shell 111, the lower house 112 of the vapor can 110 of the internal foam molding machine 100 of the synthetic resin of first embodiment of the invention, no longer describe.

Mould 350 comprises a combination die 351 and a counterdie 352 on one.

Last combination die 351 comprises an outer hemispherical Shell 351a and a plurality of circular cone 351b.Outer hemispherical Shell 351a bottom-open has the adpting flange 351h of a bottom.Outer hemispherical Shell 351a top has a plurality of conical through-hole 351c.Circular cone 351b can have at least one through hole 351d.The hole wall surface of conical through-hole 351c and the conical surface of circular cone 351b are carried out general machining; Circular cone 351b after a plurality of machinings is inserted in the conical through-hole 351c after a plurality of machinings; A plurality of circular cone 351b and outer hemispherical Shell 351a are combined; The conical surface of circular cone 351b contacts with the hole wall surface of conical through-hole 351c, has contact air gap 351p.

Counterdie 352 is a hemispherical Shell, hemispherical Shell 352 in being also referred to as.Interior hemispherical Shell 352 bottom-open have the adpting flange 352h of a bottom.Interior hemispherical Shell 352 tops have a plurality of upper conical projection section 352a.Through general turning or processed the top surface of the upper conical projection section 352a at the upper surface of the adpting flange 352h of the lower surface of the adpting flange 351h of outer hemispherical Shell 351a bottom, the basal surface of circular cone 351b, interior hemispherical Shell 352 bottoms and interior hemispherical Shell 352 tops is processed into the plane.

Adpting flange 351h and the adpting flange 352h of interior hemispherical Shell 352 bottoms that will go up the outer hemispherical Shell 351a bottom of combination die 351 with a plurality of bolts or screw 357 combine; The lower surface of adpting flange 351h contacts with the upper surface of adpting flange 352h, has contact air gap 358.The top surface of a plurality of cone boss 352a at interior hemispherical Shell 352 tops contacts with the basal surface of a plurality of circular cone 351b, has contact air gap 359.

The lower surface of the adpting flange 351h of the outer hemispherical Shell 351a bottom of the mould that fills full material bead 380 in the die cavity 350 is bearing in through a sealing gasket or sealing ring 318 on the upper surface of adpting flange 312b at housing lower half 312 tops of vapor can 310; The adpting flange 311b of upper shell 311 bottoms is bearing in through sealing gasket or sealing ring 313 on the upper surface of adpting flange 312b at lower house 312 tops of vapor can 310; With a plurality of bolts 319 upper shell 311 and lower house 312 are installed together; Thereby, the internal foam molding machine 300 of the synthetic resin of formation third embodiment of the invention.

The mould internal foam forming method of the synthetic resin of the third embodiment of the invention of the internal foam molding machine 300 of the synthetic resin of employing third embodiment of the invention is identical with the mould internal foam forming method of the synthetic resin of the first embodiment of the invention of the internal foam molding machine 100 of the synthetic resin that adopts first embodiment of the invention, no longer describes.

Referring to Fig. 4, the internal foam molding machine 400 of the synthetic resin of four embodiment of the invention comprises a vapor can 410 and a mould 450.

Vapor can 410 comprises a upper shell 411, sealing gasket or the sealing ring 413 of a lower house 412 and between upper shell 411 and lower house 412 faying faces.

The upper shell 411 of vapor can 410, lower house 412 and sealing ring 413 are identical with sealing ring 113 structures with upper shell 111, the lower house 112 of the vapor can 110 of the internal foam molding machine 100 of the synthetic resin of first embodiment of the invention, no longer describe.

Mould 450 comprises a patrix 451 and a counterdie 452.

Patrix 451 is an outer cylindrical casing, and promptly outer cylindrical casing 451.The roof of outer cylindrical casing 451 has barrel shell part 451a and at least one lower flange part 451b in one.Interior barrel shell part 451a open-top, diapire has a through hole 451c.Lower flange part 451b has a through hole 451d.Outer cylindrical casing 451 bottom-open have an adpting flange 451e.Through general turning or processed the lower surface of the interior barrel shell part 451a diapire of outer cylindrical casing 451, the lower surface of lower flange part 451b and the bottom end face of adpting flange 451e are processed into the plane.

Counterdie 452 is a base plate, and promptly base plate 452.Base plate 452 has an at least one interior barrel shell part 452a and a upper flange part 452b.Interior barrel shell part 452a bottom-open.Through general turning or processed the upper surface of the interior barrel shell part 452a of base plate 452, the top end of upper flange part 452b and the upper surface of base plate 452 are processed into the plane.

Is that the adpting flange 451e and the counterdie 452 of outer cylindrical casing 451 bottoms is that base plate 452 combines with a plurality of bolts or screw 454 with patrix 451; The lower surface of the interior barrel shell part 451a diapire of outer cylindrical casing 451 contacts with the top end of the upper flange part 452b of base plate 452; Has contact air gap 451p; The lower surface of the lower flange part 451b of outer cylindrical casing 451 contacts with the upper surface of the interior barrel shell part 452a of base plate 452; Have contact air gap 451q, the bottom end face of the adpting flange 451e of outer cylindrical casing 451 contacts with the upper surface of base plate 452, has contact air gap 458.

The lower surface 451j of the adpting flange 451e of outer cylindrical casing 451 bottoms of the mould that fills full material bead 480 in the die cavity 450 is bearing in through a sealing gasket or sealing ring 418 on the upper surface of adpting flange 412b at housing lower half 412 tops of vapor can 410; The adpting flange 411b of upper shell 411 bottoms is bearing in through sealing gasket or sealing ring 413 on the upper surface of adpting flange 412b at lower house 412 tops of vapor can 410; With a plurality of bolts 419 upper shell 411 and lower house 412 are installed together; Thereby, the internal foam molding machine 400 of the synthetic resin of formation four embodiment of the invention.

The mould internal foam forming method of the synthetic resin of the four embodiment of the invention of the internal foam molding machine 400 of the synthetic resin of employing four embodiment of the invention is identical with the mould internal foam forming method of the synthetic resin of the first embodiment of the invention of the internal foam molding machine 100 of the synthetic resin that adopts first embodiment of the invention, no longer describes.

Referring to Fig. 5, the internal foam molding machine 500 of the synthetic resin of fifth embodiment of the invention comprises a vapor can 510 and a mould 550.

Vapor can 510 comprises a upper shell 511, sealing gasket or the sealing ring 513 of a lower house 512 and between upper shell 511 and lower house 512 faying faces.

The upper shell 511 of vapor can 510, lower house 512 and sealing ring 513 are identical with sealing ring 113 structures with upper shell 111, the lower house 112 of the vapor can 110 of the internal foam molding machine 100 of the synthetic resin of first embodiment of the invention, no longer describe.

Mould 550 comprises a patrix 551 and a counterdie 552.

Patrix 551 is an outer hemispherical Shell, promptly outer hemispherical Shell 551.Outer hemispherical Shell 551 bottom-open have the adpting flange 551h of a bottom.Outer hemispherical Shell 551 tops have a plurality of inferior pyramidal projection section 551a.Each inferior pyramidal projection section 551a has a passage 551c.Basal surface to inferior pyramidal projection section 551a carries out general machining, makes it form plane or curved surface.General turning or processed are carried out in lower surface to adpting flange 551h, make it form the plane.

Counterdie 552 is a hemispherical Shell, hemispherical Shell 552 in being also referred to as.Interior hemispherical Shell 552 bottom-open have the adpting flange 552h of a bottom.Interior hemispherical Shell 552 tops have a plurality of upper conical projection section 552a.Top surface to upper conical projection section 552a carries out general machining, makes it form plane or curved surface.General turning or processed are carried out in upper surface to adpting flange 552h, make it form the plane.

With a plurality of bolts or screw 557 the adpting flange 551h of outer hemispherical Shell 551 bottoms of patrix 551 and the adpting flange 552h of interior hemispherical Shell 552 bottoms are combined; The lower surface of adpting flange 551h contacts with the upper surface of adpting flange 552h, has contact air gap 558.The top surface of a plurality of upper conical projection section 552a at interior hemispherical Shell 552 tops contacts with the basal surface of a plurality of inferior pyramidal projection section 551a at outer hemispherical Shell 551 tops, has contact air gap 551p.

The lower surface of the adpting flange 551h of outer hemispherical Shell 551 bottoms of the mould that fills full material bead 580 in the die cavity 550 is bearing in through a sealing gasket or sealing ring 518 on the upper surface of adpting flange 512b at housing lower half 512 tops of vapor can 510; The adpting flange 511b of upper shell 511 bottoms is bearing in through sealing gasket or sealing ring 513 on the upper surface of adpting flange 512b at lower house 512 tops of vapor can 510; With a plurality of bolts 519 upper shell 511 and lower house 512 are installed together; Thereby, the internal foam molding machine 500 of the synthetic resin of formation fifth embodiment of the invention.

The mould internal foam forming method of the synthetic resin of the fifth embodiment of the invention of the internal foam molding machine 500 of the synthetic resin of employing fifth embodiment of the invention is identical with the mould internal foam forming method of the synthetic resin of the first embodiment of the invention of the internal foam molding machine 100 of the synthetic resin that adopts first embodiment of the invention, no longer describes.

In above-mentioned first to the 5th embodiment, can sealing gasket or sealing ring 518 be merged into a sealing gasket or sealing ring with sealing gasket or sealing ring 513.

Referring to Fig. 6, the internal foam molding machine 600 of the synthetic resin of sixth embodiment of the invention comprises vapour jacket housing 611 on, sealing gasket or sealing ring 613 and the mould 650 of vapour jacket housing 612, between last vapour jacket housing 611 and following vapour jacket housing 612 faying faces once.

Last vapour jacket housing 611, upper shell 111, lower house 112 and the sealing ring 113 of the vapor can 110 of the internal foam molding machine 100 of the synthetic resin of vapour jacket housing 612, the sealing gasket between last vapour jacket housing 611 and play vapour jacket housing 612 faying faces or sealing ring 613 and first embodiment of the invention are constructed basic identical down; But the inboard, lower surface of the adpting flange 611b of last vapour jacket housing 611 has an annular groove 611d; The inboard, upper surface of the adpting flange 612b of following vapour jacket housing 612 has an annular groove 612d, and other is no longer described.

Mould 650 comprises a patrix 651 and a counterdie 652.

Patrix 651 is an outer hemispherical Shell, promptly outer hemispherical Shell 651.Outer hemispherical Shell 651 bottom-open have the adpting flange 651h of a bottom.Outer hemispherical Shell 651 tops have a plurality of inferior pyramidal projection section 651a.Each inferior pyramidal projection section 651a has a passage 651c.Basal surface to inferior pyramidal projection section 651a carries out general machining, makes it form plane or curved surface.Externally general turning or processed are carried out in the upper and lower end face of hemispherical Shell 651, make it form the plane.

Counterdie 652 is a hemispherical Shell, hemispherical Shell 652 in being also referred to as.Interior hemispherical Shell 652 bottom-open have the adpting flange 652h of a bottom.Interior hemispherical Shell 652 tops have a plurality of upper conical projection section 652a.Top surface to upper conical projection section 652a carries out general machining, makes it form plane or curved surface.General turning or processed are carried out in the upper and lower end face of the upper and lower end face adpting flange 652h of adpting flange 652h, make it form the plane.The upper surface of adpting flange 652h has an annular lip 652b.Annular lip 652b is carried out general turning or processed, make it form the plane.Adpting flange 652h has a plurality of through hole 652s.

With a plurality of counter-sunk screws the adpting flange 651h of outer hemispherical Shell 651 is installed in hermetically in the inboard annular groove 611d in the lower surface of adpting flange 611b of vapour jacket housing 611, thus constitute one have a last vapour jacket housing 611 patrix 651.With a plurality of counter-sunk screws the adpting flange 652h of interior hemispherical Shell 652 is installed in down hermetically in the inboard annular groove 612d in the upper surface of adpting flange 612b of vapour jacket housing 612, thus constitute one have a following vapour jacket housing 612 counterdie 652.

With a plurality of bolts or screw 657 the adpting flange 651h of outer hemispherical Shell 651 bottoms of patrix 651 and the adpting flange 652h of interior hemispherical Shell 652 bottoms are combined; The lower surface of adpting flange 651h contacts with the upper surface of adpting flange 652h, has contact air gap 658.The top surface of a plurality of upper conical projection section 652a at interior hemispherical Shell 652 tops contacts with the basal surface of a plurality of inferior pyramidal projection section 651a at outer hemispherical Shell 651 tops, has contact air gap 651p.

The lower surface of adpting flange 651h of bottom that will have a patrix 651 of last vapour jacket housing 611 is bearing in through a sealing gasket or sealing ring 613 on the upper surface of adpting flange 612b of the counterdie 652 with following vapour jacket housing 612; The patrix 651 that will have last vapour jacket housing 611 with a plurality of bolts 619 is installed together with the counterdie 652 with following vapour jacket housing 612; Thereby, the internal foam molding machine 600 of the synthetic resin of formation sixth embodiment of the invention.Wherein, the lower surface of adpting flange 651h contacts with the upper surface of annular lip 652b, has contact air gap 658.The top surface of a plurality of upper conical projection section 652a at interior hemispherical Shell 652 tops contacts with the basal surface of a plurality of inferior pyramidal projection section 651a at outer hemispherical Shell 651 tops, has contact air gap 651p.

Before expanded foamed, through filling material bead 680 in the die cavity of filling pipe alignment mould.

The mould internal foam forming method of the synthetic resin of the sixth embodiment of the invention of the internal foam molding machine 600 of the synthetic resin of employing sixth embodiment of the invention is identical with the mould internal foam forming method of the synthetic resin of the first embodiment of the invention of the internal foam molding machine 100 of the synthetic resin that adopts first embodiment of the invention, no longer describes.

Upper shell 211 among six embodiment of second embodiment of the invention to the; 311; 411; 511 and 611 centre bore 211c; 311c; 411c; 511c and 611c; Hot water supply pipeline 214; 314; 414; 514 and 614; Valve 214a; 314a; 414a; 514a and 614a; Steam suppling tube line 215; 315; 415; 515 and 615; Valve 215a; 315a; 415a; 415a; 515a and 615a and lower house 212; 312; 412; 512 and 612 centre bore 212c; 312c; 412c; 512c and 612c; Hot water discharge pipe's line 216; 316; 416; 516 and 616; Valve 216a; 316a; 416a; 516a and 616a; Vapour-discharge tube line 217; 317; 417; 517 and 617; Valve 217a; 317a; 417a; 517a and 617a respectively with first embodiment of the invention in the centre bore 111c of upper shell 111; Hot water supply pipeline 114; Valve 114a; Steam suppling tube line 115; The centre bore 112c of valve 115a and lower house 112; Hot water discharge pipe's line 116; Valve 116a; Vapour-discharge tube line 117; Valve 117a is identical.

Upper plenum 220,320,420,520 among six embodiment of second embodiment of the invention to the and 620 and down cavity 240,340,440,540 with 640 respectively with first embodiment of the invention in upper plenum 120 and cavity 140 is identical down.

Above-mentioned hot water supply pipeline 114,214,314,414,514 and 614 and steam suppling tube line 115,215,315,415,515 and 615 can be respectively as hot water discharge pipe's line and vapour-discharge tube line; Correspondingly, hot water discharge pipe's line 116,216,316,416,516 and 616 and vapour-discharge tube line 117,217,317,417,517 and 617 can be respectively as hot water supply pipeline and steam suppling tube line.At this moment; Being used in the internal foam molding machine 100 to 600 of the synthetic resin of six embodiment of first embodiment of the invention to the allows steam to get into the contact air gap of cavity down from mold cavity just to be become and is used to allow steam to get into the contact air gap of mold cavity from cavity down, and the contact air gap that is used to allow steam to get into mold cavity from upper plenum just becomes and is used to allow steam to get into the contact air gap of upper plenum from mold cavity.In order to obtain high-quality expanded molded article; Need make material bead 180,280,380,480,580 and 680 thermally equivalents in upper die and lower die and the mold cavity; Can between valve 114a, 214a, 314a, 414a, 514a and 614a and valve 115a, 215a, 315a, 415a, 415a, 515a and 615a and valve 116a, 216a, 316a, 416a, 516a and 616a and valve 117a, 217a, 317a, 417a, 517a and 617a, switch, realize the transformation of above-mentioned steam and hot water turnover mold cavity direction.

Raw material as material bead 180,280,380,480,580 and 680; Choose to have and be fit to the for example raw material of the characteristic of the condition of work of the expanded molded article of manufacturing; Wherein can adopt polystyrene synthetic resin material, polyolefin synthetic resin material copolymer such as polyethylene and polypropylene and these synthetic resin materials.

To the not special restriction of the density of material bead 180,280,380,480,580 and 680, in concrete the application, material bead 180,280,380,480,580 and 680 density are generally at 10KG/M ³To 150KG/M ³Scope in.

According to embodiments of the invention describing the present invention property and nonrestrictive description, but should be understood that and do not breaking away under the situation of the relevant protection domain that limits claim that those skilled in the art can make change and/or revise.

Claims

1. the internal foam molding machine of a synthetic resin comprises the mould of a vapor can and in vapor can; Vapor can comprises a upper shell, the sealing device of a lower house and between upper shell and lower house faying face; It is characterized in that; Mould comprises a patrix and a counterdie; Patrix seals and is bearing in movably on the lower house of vapor can through a sealing device; Vapor can inside is divided into a upper plenum and cavity once airtightly, and the steam in the upper plenum can only be through being used to allow steam to get in the mold cavity from the contact air gap that upper plenum gets into mold cavity, and the steam that gets in the mold cavity can only get into down in the cavity through being used to allow steam to get into down the contact air gap of cavity from mold cavity.

2. the internal foam molding machine of synthetic resin according to claim 1; It is characterized in that; Patrix is last whole mould; Counterdie is following whole mould, and the contact air gap that is used to allow steam to get into mold cavity from upper plenum forms between the surface at last whole mould and following whole mould contacting in mold cavity.

3. the internal foam molding machine of synthetic resin according to claim 1; It is characterized in that; Patrix is last whole mould; Counterdie is following whole mould, and the contact air gap of cavity forms between the contact surface of last whole mould and the following part that combines of whole mould outside mold cavity to be used to allow steam to get into down from mold cavity.

4. the internal foam molding machine of synthetic resin according to claim 1; It is characterized in that; Patrix is last combination die; Counterdie is following whole mould, is used to allow contact air gap that steam gets into mold cavity from upper plenum between the contact surface of the part that last combination die combines and/or at the part of last combination die, to form between the surface with time whole mould contacting in mold cavity.

5. the internal foam molding machine of synthetic resin according to claim 1; It is characterized in that; Patrix is last combination die; Counterdie is following whole mould, is used to allow steam gets into cavity down from mold cavity contact air gap between the contact surface of the part of last combination die and the following part that combine of whole mould outside mold cavity, to form.

6. the internal foam molding machine of synthetic resin according to claim 1; It is characterized in that; Patrix is last combination die; Counterdie is following combination die, be used to allow contact air gap that steam gets into mold cavity from upper plenum between the contact surface of the part that last combination die combines and the part of last combination die form between the surface with part the contacting in mold cavity of following combination die.

7. the internal foam molding machine of synthetic resin according to claim 1; It is characterized in that; Patrix is last combination die; Counterdie is following combination die, is used to allow steam gets into cavity down from mold cavity contact air gap forming between the contact surface of the part that combination die down combines and between the contact surface of the part that outside mold cavity, combines of the part of last combination die and the part of following combination die.

8. the internal foam molding machine of synthetic resin according to claim 1; It is characterized in that; The vapor can upper shell is as last vapour jacket housing; The inboard, lower surface of its adpting flange has an annular groove, and the adpting flange of patrix bottom is fixedly mounted in the annular groove of vapour jacket housing hermetically, and formation one has the patrix of last vapour jacket housing; The conduct of vapor can lower house is the vapour jacket housing down; The inboard, upper surface of the adpting flange of following vapour jacket housing has an annular groove, and the adpting flange of counterdie bottom is fixedly mounted on play in the inboard annular groove in the upper surface of adpting flange of vapour jacket housing hermetically, and formation one has the counterdie of following vapour jacket housing; The upper surface of the adpting flange of counterdie bottom has an annular lip; The lower surface of the adpting flange of patrix bottom contacts with the upper surface of annular lip, has to be used to allow steam to get into the contact air gap of cavity down from mold cavity, and the adpting flange of counterdie bottom has a plurality of connections and is used to allow steam to get into the contact air gap of cavity and the through hole of following cavity down from mold cavity.

9. according to the internal foam molding machine of the described synthetic resin of one of claim 1 to 8; It is characterized in that; The contact air gap of cavity allows the contact air gap of steam from following cavity entering mold cavity as being used to be used to allow steam to get into down from mold cavity, and the contact air gap that is used to allow steam to get into mold cavity from upper plenum allows steam to get into the contact air gap of upper plenum from mold cavity as being used to.

10. an employing is according to the mould internal foam forming method of the synthetic resin of the device of one of claim 1 to 8; It is characterized in that; Get into pipeline from external steam and get into the steam in the vapor can upper plenum; Can only get in the mold cavity from the contact air gap that upper plenum gets into mold cavity through being used to allow steam, the steam that gets in the mold cavity can only get into down in the cavity through being used to allow steam to get into down the contact air gap of cavity from mold cavity, gets into the external steam discharge pipe again.

11. the mould internal foam forming method of synthetic resin according to claim 10; It is characterized in that; Before in the upper plenum of vapor can, supplying with steam, get into pipeline from outside hot water and in the vapor can upper plenum, supply with hot water from external steam entering pipeline.

12. an employing is according to the mould internal foam forming method of the synthetic resin of the device of claim 9; It is characterized in that; Get into pipeline from external steam and get into the steam in the cavity under the vapor can; Can only be through being used to allow steam to get in the mold cavity from the contact air gap that following cavity gets into mold cavity, the steam that gets in the mold cavity can only get into the external steam discharge pipe again through being used to allow steam to get in the upper plenum from the contact air gap of mold cavity entering upper plenum.

13. the mould internal foam forming method of synthetic resin according to claim 12; It is characterized in that; Before in the following cavity of vapor can, supplying with steam, get into pipeline from outside hot water and under vapor can, supply with hot water in the cavity from external steam entering pipeline.