TW202228979A - Supercritical fluid material squeezing injection molding machine - Google Patents

Supercritical fluid material squeezing injection molding machine Download PDF

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TW202228979A
TW202228979A TW110101790A TW110101790A TW202228979A TW 202228979 A TW202228979 A TW 202228979A TW 110101790 A TW110101790 A TW 110101790A TW 110101790 A TW110101790 A TW 110101790A TW 202228979 A TW202228979 A TW 202228979A
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supercritical fluid
guide rod
material guide
molding machine
mixing
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TW110101790A
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Chinese (zh)
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TWI780575B (en
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田文森
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大田油壓機工業股份有限公司
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Abstract

A supercritical fluid material squeezing injection molding machine includes a material squeezing unit, a supercritical fluid supply unit, and an injection unit. The material squeezing unit and the injection unit both have a pipe body and a material guiding rod. Each pipe body has a chamber in which the respective material guiding rod extends. The chamber in the material squeezing unit is divided into a guiding area and a mixing area. The material guiding rod of the material squeezing unit guides the foaming material through the guiding area to become a melting status to be conveyed to the mixing area. The supercritical fluid supply unit introduces the supercritical fluid to the mixing area to be mixed with the foaming material. The mixed foaming material is then guided into the chamber, so as to be injected into the mold.

Description

超臨界流體押料射出成形機Supercritical fluid extrusion injection molding machine

本發明係關於一種射出成形機，尤指一種超臨界流體押料射出成形機。The invention relates to an injection molding machine, especially a supercritical fluid extrusion injection molding machine.

目前市面上有許多用品是以發泡成形所製成，常見的像是運動鞋的鞋底、拖鞋、地墊及瑜珈墊等物品，由於是以發泡材料所成形，因此具有軟質的特性，所以在穿戴或使用時有較為舒適的感覺，因而受到許多消費者的喜愛。At present, many products on the market are made of foam molding, such as the soles of sports shoes, slippers, floor mats and yoga mats. Because they are formed of foam materials, they have soft characteristics, so It has a more comfortable feeling when wearing or using, so it is loved by many consumers.

然而，用以發泡成形的發泡材料，例如聚乙烯 (Polyethylene , PE)或乙烯/醋酸乙烯酯共聚物（Ethylene Vinyl Acetate ,  EVA），皆須添加發泡劑以及架橋劑等有機溶劑，始能在製程中發生化學發泡的反應以發泡成形，雖能藉此而製成前述物品，但也因大量使用有機溶劑而造成污染，而如何解決此問題，即為本發明之主要重點所在。However, foam materials used for foam molding, such as polyethylene (PE) or ethylene/vinyl acetate copolymer (Ethylene Vinyl Acetate, EVA), must be added with organic solvents such as foaming agents and bridging agents. The chemical foaming reaction can occur in the manufacturing process to form foaming, although the aforementioned articles can be made by this, but it also causes pollution due to the use of a large amount of organic solvents, and how to solve this problem is the main focus of the present invention. .

為解決上述課題，本發明提供一種超臨界流體押料射出成形機，係將發泡材料混合超臨界流體，而透過物理發泡以完成發泡成形。In order to solve the above problem, the present invention provides a supercritical fluid extrusion injection molding machine, which mixes the foaming material with the supercritical fluid, and completes the foaming molding through physical foaming.

本發明之一項實施例提供超臨界流體押料射出成形機，其主要包含一押料單元、一超臨界流體供給單元，及一射出單元。押料單元包括一第一管體及一第一導料桿，第一管體內有一沿其長度方向貫通之第一腔室，第一導料桿伸設於第一腔室內且可被驅動旋轉，第一腔室區分一導料區及一混合區，第一導料桿導引發泡原料經導料區而呈熔融狀再傳送至混合區；超臨界流體供給單元連接第一管體且直接導通混合區，以導入超臨界流體至混合區，且以第一導料桿被驅動旋轉而與發泡原料混合；射出單元包括一第二管體及一第二導料桿，第二管體內有一沿其長度方向貫通之第二腔室，第二導料桿伸設於第二腔室內且可被驅動而旋轉，第二腔室與混合區連通，在混合區經與超臨界流體混合之發泡原料被導入第二腔室，且續經第二導料桿傳送而存積在第二腔室前端，俾供射入一模具後以物理發泡而成形。An embodiment of the present invention provides a supercritical fluid extrusion injection molding machine, which mainly includes a extrusion unit, a supercritical fluid supply unit, and an injection unit. The pressing unit includes a first pipe body and a first material guide rod. The first pipe body has a first chamber running through its length direction. The first material guide rod is extended in the first chamber and can be driven to rotate. , the first chamber is divided into a material guide area and a mixing area, the first material guide rod guides the bubble-inducing raw material to pass through the material guide area to be melted and then transferred to the mixing area; the supercritical fluid supply unit is connected to the first pipe body and directly The mixing area is conducted to introduce supercritical fluid into the mixing area, and the first material guide rod is driven to rotate to mix with the foaming raw material; the injection unit includes a second pipe body and a second material guide rod, and the second pipe body There is a second chamber running through its length direction, the second material guide rod is extended in the second chamber and can be driven to rotate, the second chamber is communicated with the mixing area, and is mixed with supercritical fluid in the mixing area. The foaming raw material is introduced into the second chamber, and then conveyed by the second material guide rod and stored at the front end of the second chamber, so as to be injected into a mold and then formed by physical foaming.

藉此，在不添加發泡劑以及架橋劑等有機溶劑之情況下，發泡材料可藉由在混合區與超臨界流體混合後，再被射入模具，並以物理發泡的方式而成形模具預定之成品，進而解決添加發泡劑以及架橋劑等有機溶劑會造成污染的問題，以達到發泡製程環保之功效。In this way, without adding organic solvents such as foaming agents and bridging agents, the foamed material can be injected into the mold after being mixed with the supercritical fluid in the mixing zone and formed by physical foaming The finished product of the mold, and then solve the problem of pollution caused by adding organic solvents such as foaming agent and bridging agent, so as to achieve the effect of environmental protection in the foaming process.

為便於說明本發明於上述發明內容一欄中所表示的中心思想，茲以具體實施例表達。實施例中各種不同物件係按適於說明之比例、尺寸、變形量或位移量而描繪，而非按實際元件的比例予以繪製，合先敘明。In order to facilitate the description of the central idea of the present invention expressed in the column of the above-mentioned summary of the invention, specific embodiments are hereby expressed. Various objects in the embodiments are drawn according to proportions, sizes, deformations or displacements suitable for description, rather than the proportions of actual elements, which will be described first.

請參閱圖1至圖9所示，本發明提供一種超臨界流體押料射出成形機100，其包含一押料單元10、一超臨界流體供給單元20，以及一射出單元30，且於本實施例中進一步包括一氣閥40，其中：Please refer to FIGS. 1 to 9 , the present invention provides a supercritical fluid extrusion injection molding machine 100, which includes a extrusion unit 10, a supercritical fluid supply unit 20, and an injection unit 30, and in this embodiment The example further includes an air valve 40, wherein:

所述押料單元10，其包括一第一管體11及一第一導料桿12，第一管體11內有一沿其長度方向貫通之第一腔室13，第一導料桿12伸設於第一腔室13內且可被驅動旋轉，第一腔室13區分一導料區131及一混合區132，第一導料桿12用以導引發泡原料經導料區131而呈熔融狀再傳送至混合區132。所述原料經導料區131而呈熔融狀，乃係第一管體11設加熱器(圖中未示)而對發泡原料進行加熱所致，所述加熱器例如沿著第一管體11的外周均勻設置。The pressing unit 10 includes a first pipe body 11 and a first material guide rod 12. The first pipe body 11 has a first chamber 13 running through the length of the first pipe body 11. The first material guide rod 12 extends. The first chamber 13 is arranged in the first chamber 13 and can be driven to rotate. The first chamber 13 is divided into a material guide area 131 and a mixing area 132 . The molten form is then conveyed to mixing zone 132 . The raw material is melted through the material guiding zone 131, which is caused by the first pipe body 11 being provided with a heater (not shown in the figure) to heat the foamed raw material. The heater is, for example, along the first pipe body. The perimeter of 11 is evenly set.

於本實施例中，第一導料桿12於導料區131中具有一螺桿段121，且於混合區132中具有一混拌段122，所述螺桿段121係藉其螺紋而導引發泡原料往混合區132之方向傳動，而混拌段122則供混合所述發泡原料及所述超臨界流體，混拌段122於本實施例係複數凸塊123於第一導料桿12間隔佈滿所形成，藉由具有間隔之凸塊123，而可對所述發泡原料及所述超臨界流體充分攪拌而達到均勻混合的效果，惟混拌段122以凸塊123間隔佈滿僅為一種較佳實施態樣，本發明不以此為限。In this embodiment, the first material guide rod 12 has a screw section 121 in the material guide area 131, and has a mixing section 122 in the mixing area 132, and the screw section 121 induces bubbles by its threads. The raw materials are driven in the direction of the mixing zone 132, and the mixing section 122 is used for mixing the foamed raw materials and the supercritical fluid. The mixing section 122 in this embodiment is a plurality of bumps 123 spaced from the first material guide rod 12. The foaming material and the supercritical fluid can be fully stirred to achieve the effect of uniform mixing by the bumps 123 with intervals, but the mixing section 122 is covered only with the bumps 123. As a preferred embodiment, the present invention is not limited to this.

於本實施例中，第一導料桿12於螺桿段121之前端具有一斜錐部124，且於混拌段122之前端亦具有一斜錐部125，斜錐部124及斜錐部125皆往所述發泡原料之傳送方向由寬至窄而呈漸縮狀。本實施例之第一導料桿12對應斜錐部124及斜錐部125則分別套設一止逆環14，各止逆環14具有一通道141及一斜凹部142(如圖3、6所示)，各止逆環14之通道141在供所述發泡原料呈熔融狀時得以流通，而各止逆環14之斜凹部142則相對止擋於所對應之斜錐部124或斜錐部125。In this embodiment, the first material guide rod 12 has an oblique taper portion 124 at the front end of the screw segment 121 , and also has an oblique taper portion 125 at the front end of the mixing segment 122 , the oblique taper portion 124 and the oblique taper portion 125 They are all tapered from wide to narrow in the conveying direction of the foaming raw material. In the first material guide rod 12 of this embodiment, a non-return ring 14 is respectively sleeved corresponding to the inclined cone portion 124 and the inclined cone portion 125 , and each non-return ring 14 has a channel 141 and an inclined concave portion 142 (see FIGS. shown), the channels 141 of each non-return ring 14 can flow when the foaming raw material is in a molten state, and the inclined concave portion 142 of each non-return ring 14 is relatively stopped against the corresponding inclined cone portion 124 or inclined Taper 125.

承上，本實施例之第一導料桿12於螺桿段121之前端具有一擋件15，而設於螺桿段121之前端的止逆環14，是可前後位移地設在斜錐部124和擋件15之間，擋件15沿螺桿段121之徑向呈輻射狀 (如圖4所示)，因而形成複數通孔151以供所述發泡原料通過。當發泡原料受螺桿段121導引而向混合區132流動時，止逆環14因受發泡原料推動而往混合區132的方向移動，直至止逆環14會被擋件15阻擋而停止，此時發泡原料藉被推送的力量而可由止逆環14之通道141中通過，並再通過擋件15之通孔151而進入混合區132 。Bearing on the above, the first material guide rod 12 of this embodiment has a stopper 15 at the front end of the screw segment 121, and the non-return ring 14 provided at the front end of the screw segment 121 is displaceable back and forth. Between the blocking members 15 , the blocking members 15 are radial along the radial direction of the screw segment 121 (as shown in FIG. 4 ), thus forming a plurality of through holes 151 for the foaming raw materials to pass through. When the foaming raw material is guided by the screw section 121 to flow toward the mixing zone 132, the non-return ring 14 is pushed by the foaming raw material and moves towards the direction of the mixing zone 132 until the non-return ring 14 is blocked by the stopper 15 and stops At this time, the foaming raw material can pass through the channel 141 of the check ring 14 by the force being pushed, and then enter the mixing area 132 through the through hole 151 of the blocking member 15 .

所述超臨界流體供給單元20，其連接第一管體11且直接導通混合區132，以導入超臨界流體至混合區132，且以第一導料桿12被驅動旋轉而與所述發泡原料混合。所述超臨界流體，於本實施例中係以二氧化碳(CO 2)為例，但不以二氧化碳(CO 2)為限，例如水（H 2O）或甲烷（CH4）亦可為本發明所述超臨界流體。 The supercritical fluid supply unit 20 is connected to the first pipe body 11 and directly connected to the mixing area 132 to introduce supercritical fluid to the mixing area 132, and is driven to rotate by the first material guide rod 12 to communicate with the foaming. Raw materials are mixed. The supercritical fluid is carbon dioxide (CO 2 ) in this embodiment, but not limited to carbon dioxide (CO 2 ) . For example, water (H 2 O) or methane (CH 4 ) can also be used in the present invention. the supercritical fluid.

於本實施例中，超臨界流體供給單元20包括一瓶體21，此瓶體21於本實施例中為鋼瓶以儲存所述超臨界流體；本實施例之超臨界流體供給單元20並設一管路22，以管路22之設置而連通瓶體21和混合區132，並在瓶體21和混合區132之管路22中途設有一加壓泵浦23，透過加壓泵浦23驅動加壓而使瓶體21所釋放之超臨界流體經管路22而被導入混合區132，以和發泡原料在混合區132受混拌段122之作動而充分混合。較佳地，本實施例在加壓泵浦23和混合區132之管路22中途設有一儲氣瓶24，在加壓泵浦23驅動加壓時，可在儲氣瓶24中蓄壓，以確保超臨界流體維持在高壓下而輸送至混合區132。In this embodiment, the supercritical fluid supply unit 20 includes a bottle body 21, which is a steel cylinder in this embodiment to store the supercritical fluid; the supercritical fluid supply unit 20 in this embodiment is also provided with a The pipeline 22 is connected with the bottle body 21 and the mixing area 132 by the arrangement of the pipeline 22, and a pressurized pump 23 is arranged in the middle of the pipeline 22 between the bottle body 21 and the mixing area 132, and the pressure pump 23 is driven by the pressurized pump 23. The supercritical fluid released from the bottle body 21 is introduced into the mixing zone 132 through the pipeline 22 under pressure, so as to be fully mixed with the foaming raw material in the mixing zone 132 by the action of the mixing section 122 . Preferably, in this embodiment, a gas storage cylinder 24 is provided in the middle of the pipeline 22 between the pressurizing pump 23 and the mixing area 132. When the pressurizing pump 23 is driven and pressurized, the pressure can be stored in the gas storage cylinder 24. The supercritical fluid is delivered to the mixing zone 132 to ensure that the supercritical fluid is maintained at high pressure.

所述射出單元30，其包括一第二管體31及一第二導料桿32，第二管體31內有一沿其長度方向貫通之第二腔室33，第二導料桿32伸設於第二腔室33內且可被驅動而旋轉，第二腔室33與混合區132連通，在混合區132經與所述超臨界流體混合之發泡原料被導入第二腔室33，且續經第二導料桿32傳送而存積在第二腔室33前端，俾供射入一模具M後以物理發泡而成形。於本實施例中，第二導料桿32和螺桿段121同為螺桿。The injection unit 30 includes a second pipe body 31 and a second material guide rod 32. The second pipe body 31 has a second chamber 33 extending through the length of the second pipe body 31. The second material guide rod 32 extends In the second chamber 33 and can be driven to rotate, the second chamber 33 communicates with the mixing zone 132, and the foaming raw material mixed with the supercritical fluid in the mixing zone 132 is introduced into the second chamber 33, and It is then transferred through the second material guide rod 32 and stored at the front end of the second cavity 33 for injection into a mold M and then formed by physical foaming. In this embodiment, the second material guide rod 32 and the screw segment 121 are both screws.

於本實施例中，第二導料桿32前端具有一斜錐部321，此斜錐部321係往所述發泡原料之傳送方向由寬至窄而漸縮，第二導料桿32對應斜錐部321套設有一止逆環34，此止逆環34具有一通道341和一斜凹部342(如圖8所示)，所述通道341係可供發泡原料流通，而止逆環34之斜凹部342則可相對止擋於斜錐部321。In this embodiment, the front end of the second material guide rod 32 has an oblique cone portion 321, and the inclined cone portion 321 tapers from wide to narrow toward the conveying direction of the foaming material. The second material guide rod 32 corresponds to The inclined cone portion 321 is sleeved with a non-return ring 34. The non-return ring 34 has a channel 341 and an inclined concave portion 342 (as shown in FIG. 8). The oblique concave portion 342 of 34 can be relatively stopped against the oblique cone portion 321 .

於本實施例中，第一導料桿12和第二導料桿32分別連結一驅動馬達而被驅動旋轉。較佳地，本實施例之第一導料桿12係連結一電動馬達16(例如交流馬達)，第一導料桿12藉電動馬達16供電而被其驅動旋轉；本實施例之第二導料桿32則連結一油壓馬達35，此油壓馬達35係連結一油壓系統(圖中未示)，第二導料桿32則藉油壓馬達35而被其驅動旋轉。本實施例之第二導料桿32並連結一驅動缸36，此驅動缸36於本實施例中亦為油壓缸，且驅動缸36係結合在油壓馬達35，油壓馬達35則架設於一對導軌37，藉由驅動缸36之作動而可帶動第二導料桿32於第二腔室33內直線位移。In this embodiment, the first material guide rod 12 and the second material guide rod 32 are respectively connected with a driving motor to be driven to rotate. Preferably, the first material guide rod 12 in this embodiment is connected to an electric motor 16 (eg an AC motor), and the first material guide rod 12 is powered by the electric motor 16 to be driven to rotate; The material rod 32 is connected to a hydraulic motor 35 , which is connected to a hydraulic system (not shown in the figure), and the second material guide rod 32 is driven and rotated by the hydraulic motor 35 . The second material guide rod 32 in this embodiment is connected to a driving cylinder 36. The driving cylinder 36 is also a hydraulic cylinder in this embodiment, and the driving cylinder 36 is combined with the hydraulic motor 35, and the hydraulic motor 35 is erected The pair of guide rails 37 can drive the second material guide rod 32 to move linearly in the second chamber 33 by the actuation of the driving cylinder 36 .

上述實施例之超臨界流體押料射出成形機100於實際操作時，係於第一管體11所設之料斗111倒入發泡原料A，第一導料桿12受電動馬達16帶動而旋轉，發泡原料A便在導料區131中經螺桿段121導引而往混合區132的方向傳送(如圖2所示)，發泡原料A在傳送的過程中逐漸呈熔融狀而通過止逆環14之通道141以及擋件15之通孔151(如圖4所示)。During the actual operation of the supercritical fluid extrusion molding machine 100 of the above-mentioned embodiment, the foaming material A is poured into the hopper 111 of the first pipe body 11 , and the first material guide rod 12 is driven by the electric motor 16 to rotate. , the foaming raw material A is guided by the screw section 121 in the material guide area 131 and conveyed to the direction of the mixing area 132 (as shown in FIG. 2 ). The channel 141 of the reverse ring 14 and the through hole 151 of the blocking member 15 (as shown in FIG. 4 ).

承上，當發泡原料A進入混合區132時，超臨界流體也隨著加壓泵浦23驅動加壓以及儲氣瓶24之蓄壓而導入混合區132(如圖3所示)，此時超臨界流體為液態，並藉由第一導料桿12受電動馬達16帶動而旋轉，混拌段122便對混合區132中之發泡原料A及液態狀的超臨界流體攪拌混合，且隨著第一導料桿12持續旋轉，而將混合超臨界流體之發泡原料A導入第二腔室33(如圖4所示)。As mentioned above, when the foaming raw material A enters the mixing area 132, the supercritical fluid is also introduced into the mixing area 132 (as shown in FIG. 3 ) along with the driving pressure of the pressurizing pump 23 and the accumulating pressure of the gas storage cylinder 24 (as shown in FIG. 3 ). When the supercritical fluid is in liquid state, the first material guide rod 12 is driven by the electric motor 16 to rotate, and the mixing section 122 stirs and mixes the foaming raw material A and the liquid supercritical fluid in the mixing zone 132, and As the first material guide rod 12 continues to rotate, the foaming raw material A mixed with the supercritical fluid is introduced into the second chamber 33 (as shown in FIG. 4 ).

當混合超臨界流體之發泡原料A被導入第二腔室33後，由於第二導料桿32受油壓馬達35之驅動而旋轉，發泡原料A因而被存積在第二腔室33的前端(如圖5所示)，而在存積的發泡原料A到達一預設重量時，電動馬達16和油壓馬達35即停止對第一導料桿12和第二導料桿32之帶動，止逆環14和止逆環34所受發泡原料A之推送力量隨即消失，反因超臨界流體所含的高壓狀態而對止逆環14和止逆環34形成逆推動作，使止逆環14之斜凹部142分別止擋在斜錐部124及斜錐部125(如圖6、7所示)，且止逆環34之斜凹部342也止擋在斜錐部321(如圖8所示)，藉止逆環14及止逆環34產生之止逆作用，使第二腔室33內之發泡原料A維持在高壓狀態，便可控制驅動缸36帶動第二導料桿32推擠發泡原料A，使發泡原料A射入模具M內(如圖9所示)，且待一預定時間即將到達時，可控制氣閥40在開模前先洩壓排氣，而在預定時間到達時，發泡原料A開模即可產生物理發泡而成形模具M之模穴所預設成形之成品(圖中未示)。After the foaming material A mixed with supercritical fluid is introduced into the second chamber 33 , the second material guide rod 32 is rotated by the hydraulic motor 35 , and the foaming material A is stored in the second chamber 33 . (as shown in FIG. 5 ), and when the accumulated foaming raw material A reaches a preset weight, the electric motor 16 and the hydraulic motor 35 stop feeding the first guide rod 12 and the second guide rod 32 Driven by this, the pushing force of the foaming raw material A on the non-return ring 14 and the non-return ring 34 disappears immediately, and the high-pressure state contained in the supercritical fluid causes a reverse push action on the non-return ring 14 and the non-return ring 34. The inclined concave portion 142 of the non-return ring 14 is stopped at the inclined cone portion 124 and the inclined cone portion 125 respectively (as shown in FIGS. 6 and 7 ), and the inclined concave portion 342 of the non-return ring 34 is also stopped at the inclined cone portion 321 ( As shown in FIG. 8 ), by the anti-return effect produced by the check ring 14 and the check ring 34, the foaming raw material A in the second chamber 33 is maintained in a high pressure state, and the driving cylinder 36 can be controlled to drive the second guide The material rod 32 pushes the foaming raw material A, so that the foaming raw material A is injected into the mold M (as shown in FIG. 9 ), and when a predetermined time is about to arrive, the air valve 40 can be controlled to release the pressure before opening the mold. When the predetermined time arrives, the foaming raw material A can open the mold to generate physical foaming and form the finished product (not shown in the figure) that is preset in the cavity of the mold M.

由上述之說明不難發現本發明之特點在於，上述超臨界流體押料射出成形機100於發泡製程中，係藉由發泡材料A在混合區132與超臨界流體進行混合後再被射入模具M，即以物理發泡的方式而成形模具預定之成品，完全不添加任何如發泡劑以及架橋劑等有機溶劑，藉以解決發泡劑以及架橋劑等有機溶劑造成污染的問題，即可達到發泡製程環保之功效。From the above description, it is not difficult to find that the feature of the present invention is that in the foaming process of the supercritical fluid injection molding machine 100, the foaming material A is mixed with the supercritical fluid in the mixing zone 132 and then injected. Enter the mold M, that is, to form the predetermined finished product of the mold by physical foaming, without adding any organic solvents such as foaming agents and bridging agents, so as to solve the problem of pollution caused by organic solvents such as foaming agents and bridging agents, namely It can achieve the effect of environmental protection in the foaming process.

以上所舉實施例僅用以說明本發明而已，非用以限制本發明之範圍。舉凡不違本發明精神所從事的種種修改或變化，俱屬本發明意欲保護之範疇。The above-mentioned embodiments are only used to illustrate the present invention, but not to limit the scope of the present invention. All the modifications or changes that do not violate the spirit of the present invention belong to the intended protection category of the present invention.

100:超臨界流體押料射出成形機 10:押料單元 11:第一管體 111:料斗 12:第一導料桿 121:螺桿段 122:混拌段 123:凸塊 124:斜錐部 125:斜錐部 13:第一腔室 131:導料區 132:混合區 14:止逆環 141:通道 142:斜凹部 15:擋件 151:通孔 16:電動馬達 20:超臨界流體供給單元 21:瓶體 22:管路 23:加壓泵浦 24:儲氣瓶 30:射出單元 31:第二管體 32:第二導料桿 321:斜錐部 33:第二腔室 34:止逆環 341:通道 342:斜凹部 35:油壓馬達 36:驅動缸 37:導軌 40:氣閥 A:發泡原料 M:模具 100: Supercritical fluid extrusion injection molding machine 10: Pressing unit 11: The first tube body 111: Hopper 12: The first guide rod 121: Screw segment 122: Mixing section 123: bump 124: Oblique taper 125: Oblique taper 13: The first chamber 131: Guide area 132: Mixed Zone 14: check ring 141: Channel 142: Oblique recess 15: Stopper 151: Through hole 16: Electric Motor 20: Supercritical fluid supply unit 21: bottle body 22: Pipeline 23: Pressurized pump 24: Gas cylinder 30: Injection unit 31: Second tube body 32: The second guide rod 321: Oblique taper 33: Second chamber 34: check ring 341: Channel 342: Oblique recess 35: Hydraulic motor 36: Drive cylinder 37: Rails 40: Air valve A: Foaming raw material M: mold

圖1係本發明實施例之超臨界流體押料射出成形機之示意圖。 圖2係本發明實施例之導料區中有發泡原料入料及經螺桿段傳送示意圖。 圖3係本發明實施例之混合區中導入超臨界流體與發泡原料混合之示意圖。 圖4係圖3於4-4剖線所見之剖視示意圖。 圖5係本發明實施例之射出單元有發泡原料被導入第二腔室之示意圖。 圖6係圖3中所示a區塊之局部放大圖。 圖7係圖3中所示b區塊之局部放大圖。 圖8係圖5中所示c區塊之局部放大圖。 圖9係本發明實施例之射出單元將發泡原料射入模具中之示意圖。 FIG. 1 is a schematic diagram of a supercritical fluid extrusion injection molding machine according to an embodiment of the present invention. FIG. 2 is a schematic diagram of the feeding of foaming raw materials and the conveying through the screw section in the material guiding zone according to the embodiment of the present invention. FIG. 3 is a schematic diagram of introducing supercritical fluid and mixing foaming raw materials in the mixing zone according to the embodiment of the present invention. FIG. 4 is a schematic cross-sectional view of FIG. 3 taken along the line 4-4. FIG. 5 is a schematic view of the injection unit according to the embodiment of the present invention, wherein the foaming material is introduced into the second chamber. FIG. 6 is a partial enlarged view of the block a shown in FIG. 3 . FIG. 7 is a partial enlarged view of block b shown in FIG. 3 . FIG. 8 is a partial enlarged view of block c shown in FIG. 5 . FIG. 9 is a schematic diagram of the injection unit according to the embodiment of the present invention injecting the foaming raw material into the mold.

100:超臨界流體押料射出成形機 100: Supercritical fluid extrusion injection molding machine

10:押料單元 10: Pressing unit

11:第一管體 11: The first tube body

111:料斗 111: Hopper

12:第一導料桿 12: The first guide rod

121:螺桿段 121: Screw segment

122:混拌段 122: Mixing section

123:凸塊 123: bump

124:斜錐部 124: Oblique taper

125:斜錐部 125: Oblique taper

13:第一腔室 13: The first chamber

131:導料區 131: Guide area

132:混合區 132: Mixed Zone

14:止逆環 14: check ring

15:擋件 15: Stopper

16:電動馬達 16: Electric Motor

20:超臨界流體供給單元 20: Supercritical fluid supply unit

21:瓶體 21: bottle body

22:管路 22: Pipeline

23:加壓泵浦 23: Pressurized pump

24:儲氣瓶 24: Gas cylinder

30:射出單元 30: Injection unit

31:第二管體 31: Second tube body

32:第二導料桿 32: The second guide rod

321:斜錐部 321: Oblique taper

33:第二腔室 33: Second chamber

34:止逆環 34: check ring

35:油壓馬達 35: Hydraulic motor

36:驅動缸 36: Drive cylinder

37:導軌 37: Rails

40:氣閥 40: Air valve

M:模具 M: mold

Claims (12)

一種超臨界流體押料射出成形機，其包含： 一押料單元，其包括一第一管體及一第一導料桿，該第一管體內有一沿其長度方向貫通之第一腔室，該第一導料桿伸設於該第一腔室內且可被驅動旋轉，該第一腔室區分一導料區及一混合區，該第一導料桿導引發泡原料經該導料區而呈熔融狀再傳送至該混合區； 一超臨界流體供給單元，其連接該第一管體且直接導通該混合區，以導入超臨界流體至該混合區，且以該第一導料桿被驅動旋轉而與所述發泡原料混合； 一射出單元，其包括一第二管體及一第二導料桿，該第二管體內有一沿其長度方向貫通之第二腔室，該第二導料桿伸設於該第二腔室內且可被驅動而旋轉，該第二腔室與該混合區連通，在該混合區經與所述超臨界流體混合之發泡原料被導入該第二腔室，且續經該第二導料桿傳送而存積在該第二腔室前端，俾供射入一模具後以物理發泡而成形。 A supercritical fluid extrusion molding machine, comprising: A material pressing unit includes a first tube body and a first material guide rod, the first tube body has a first cavity passing through along its length direction, and the first material guide rod extends from the first cavity Indoor and can be driven to rotate, the first chamber is divided into a material guide area and a mixing area, the first material guide rod guides the bubble-inducing raw material to pass through the material guide area to be melted and then transferred to the mixing area; A supercritical fluid supply unit, which is connected to the first pipe body and directly connected to the mixing zone, so as to introduce supercritical fluid into the mixing zone, and the first material guide rod is driven to rotate to mix with the foaming raw materials ; An injection unit, which includes a second tube body and a second material guide rod, the second tube body has a second cavity passing through along its length direction, and the second material guide rod extends in the second cavity And can be driven to rotate, the second chamber communicates with the mixing zone, and the foaming raw material mixed with the supercritical fluid in the mixing zone is introduced into the second chamber, and continues through the second guiding material The rod is transferred and stored at the front end of the second chamber for injection into a mold and then formed by physical foaming. 如請求項1所述之超臨界流體押料射出成形機，其中，該第一導料桿於該導料區中具有一供導引所述發泡原料之螺桿段，且於該混合區中具有一供混合所述發泡原料及所述超臨界流體之混拌段。The supercritical fluid extrusion injection molding machine according to claim 1, wherein the first material guide rod has a screw section in the material guide area for guiding the foaming raw material, and in the mixing area There is a mixing section for mixing the foaming raw material and the supercritical fluid. 如請求項2所述之超臨界流體押料射出成形機，其中，該混拌段係複數凸塊於該第一導料桿間隔佈滿所形成。The supercritical fluid extrusion injection molding machine according to claim 2, wherein the mixing section is formed by a plurality of bumps that are spaced apart from the first material guide rod. 如請求項2所述之超臨界流體押料射出成形機，其中，該第一導料桿分別於該螺桿段和該混拌段之前端具有一往所述發泡原料之傳送方向漸縮之斜錐部，該第一導料桿分別對應各該斜錐部而套設一止逆環，各該止逆環具有一供所述發泡原料流通之通道，且具有一可相對止擋於所對應之斜錐部的斜凹部。The supercritical fluid extrusion injection molding machine as claimed in claim 2, wherein the first material guide rod is provided with a taper toward the conveying direction of the foamed raw material at the front ends of the screw section and the mixing section, respectively. The first material guide rod is sleeved with a non-return ring corresponding to each of the inclined cone parts, each of the non-return rings has a channel for the flow of the foaming raw material, and has a relative stop The corresponding inclined concave part of the inclined cone. 如請求項4所述之超臨界流體押料射出成形機，其中，該第一導料桿於該螺桿段之前端具有一擋件，設於該螺桿段之前端的止逆環位在所對應之斜錐部和該擋件之間，該擋件沿該螺桿段之徑向呈輻射狀而形成複數可供所述發泡原料通過之通孔。The supercritical fluid extrusion injection molding machine according to claim 4, wherein the first material guide rod has a stopper at the front end of the screw segment, and the non-return ring provided at the front end of the screw segment is located at the corresponding Between the inclined cone portion and the blocking member, the blocking member is radial along the radial direction of the screw segment to form a plurality of through holes through which the foaming raw materials can pass. 如請求項2所述之超臨界流體押料射出成形機，其中，該第二導料桿前端具有一往所述發泡原料之傳送方向漸縮之斜錐部，該第二導料桿對應該斜錐部而套設一止逆環，該止逆環具有一供所述發泡原料流通之通道，且具有一可相對止擋於該斜錐部的斜凹部。The supercritical fluid extrusion injection molding machine as claimed in claim 2, wherein the front end of the second material guide rod has an oblique taper portion that tapers toward the conveying direction of the foamed raw material, and the second material guide rod is opposite to A non-return ring should be sleeved on the inclined cone portion, the non-return ring has a channel for the foaming raw material to flow, and has an inclined concave portion that can be relatively stopped on the inclined cone portion. 如請求項1所述之超臨界流體押料射出成形機，其中，該超臨界流體供給單元包括一儲存所述超臨界流體之瓶體，且設一管路連通該瓶體和該混合區，在該瓶體和該混合區之該管路中途設有一加壓泵浦，該加壓泵浦驅動加壓而使該瓶體所釋放之所述超臨界流體經該管路而被導入該混合區。The supercritical fluid extrusion injection molding machine according to claim 1, wherein the supercritical fluid supply unit comprises a bottle body for storing the supercritical fluid, and a pipeline is arranged to connect the bottle body and the mixing area, A pressurized pump is arranged in the middle of the pipeline between the bottle body and the mixing area, and the pressurized pump drives and pressurizes so that the supercritical fluid released from the bottle body is introduced into the mixing through the pipeline Area. 如請求項7所述之超臨界流體押料射出成形機，其中，在該加壓泵浦和該混合區之該管路中途設有一儲氣瓶，該加壓泵浦驅動加壓而在該儲氣瓶中蓄壓。The supercritical fluid extrusion injection molding machine as claimed in claim 7, wherein a gas storage bottle is provided in the middle of the pipeline between the pressurizing pump and the mixing area, and the pressurizing pump drives the Pressure builds up in the gas cylinder. 如請求項1所述之超臨界流體押料射出成形機，其中，該第一導料桿和該第二導料桿分別連結一驅動馬達而被驅動旋轉。The supercritical fluid extrusion injection molding machine according to claim 1, wherein the first material guide rod and the second material guide rod are respectively connected with a driving motor to be driven to rotate. 如請求項9所述之超臨界流體押料射出成形機，其中，該驅動馬達為電動馬達或油壓馬達。The supercritical fluid extrusion injection molding machine according to claim 9, wherein the drive motor is an electric motor or a hydraulic motor. 如請求項9所述之超臨界流體押料射出成形機，其中，該第二導料桿連結一驅動缸，所述發泡原料被導入而存積在該第二腔室前端後，以該驅動缸帶動該第二導料桿推擠所述發泡原料而射入該模具。The supercritical fluid extrusion injection molding machine according to claim 9, wherein the second material guide rod is connected to a driving cylinder, and after the foaming raw material is introduced and stored at the front end of the second chamber, the The driving cylinder drives the second material guide rod to push the foamed raw material and inject it into the mold. 如請求項1所述之超臨界流體押料射出成形機，進一步在該模具設一氣閥，俾供該模具在開模前洩壓排氣。According to the supercritical fluid extrusion injection molding machine as claimed in claim 1, an air valve is further provided on the mold to allow the mold to release pressure and exhaust before the mold is opened.
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