201139098 六、發明說明： 【發明所屬之技術領域】 本發明是有關藉由水中熱切法而製造熱可塑性樹脂 粒子之製造裝置及製造方法。 【先前技術】 以往之熱可塑性樹脂粒子之製造方法，已知有如專利 文獻1及2之技術，將熔融狀態之樹脂自塑模之喷嘴擠壓 出後，在冷卻水或冷卻空氣中冷卻硬化，並且使切斷刀刃 旋轉而將已冷卻之樹脂切斷成粒子狀之熱切方式的提案 (例如，參照專利文獻1及2，以下稱為以往技術1及2)。 以往技術1係藉由使用具有洛式（Rockwel 1)硬度HRA 為89以上，彎曲強度為180 kgf/mm2以上之高硬度合金 所形成的切斷刀刀之造粒機（pe 11 etizer)，即使含有高硬 度之無機充填材與合成樹脂之樹脂組成物，也可以不損及 耐摩耗性而安定地造粒。 以往技術2係使用表面隔熱之擠壓模（dies)，自擠壓 機將送入擠壓模孔之溶融樹脂向水中擠壓出並藉由旋轉切 刀切斷，可以製造粒徑0. 8至2. Omm之小粒並且圓球度高 的球狀粒子，同時，使旋轉切刀之刀刃與擠壓模表面非接 觸，可以防止刀刃與擠壓模之損傷。 如此小直徑之樹脂粒子（所謂「微顆粒 (mi crope 11 et)」，係經含浸發泡劑而用以製造發泡樹脂粒 子。 [先前技術文獻] 322579 201139098 (專利文獻） 專利文獻1:日本特開平11-77671號公報 專利文獻2:日本特開平5_3〇1218號公報 【發明内容】 [發明欲解決之課題] 在以往技術1之情形，由於使用由高硬度合金所作成 的切斷刀刀，而有容易摩耗擠壓模表面而導致擠壓模之壽 命變短之問題’以及由於在擠壓模表面產生之損傷而導致 切斷刀刀與擠壓模表面之間形成微細之間隙，進而降低切 斷精準度，結果，會有產生繩絲狀異物、樹脂粉末、以及 如第6圖所示之連繫2個以上的顆粒p而產生連結粒子c 之問題。 在以往技術2之情形，在將難於切斷樹脂（例如，烯 烴系樹脂）顆粒化時，旋轉刀之刀刃與塑模表面進行非接觸 時’會發生切斷不良之現象。 若在水中以熱切方式之以往技術2，藉由使旋轉刀之 刀刃與擠壓模表面接觸而切斷以得到小徑（尤其是丨· 5mm 以下）之微顆粒時，由於旋轉刀之旋轉數設定快速，將使旋 轉時之必要電流值提高。此時，當刀刃與擠壓模之接觸面 積大時其摩擦阻力也變大，驅動旋轉刀具旋轉之馬達負荷 會變得會縮短造粒機之壽命。 描供亡2疋有鑑於前述課題而發明者，本發明之目的是 置可^丨生樹脂粒子之製造裝置及製造方法，此裝 置及方法可以抑命丨 ^ '原自於切斷不良而導致之不良粒子的產 5 322579 201139098 生，同時，可以降低切斷刀刀與喷嘴擠壓模表面的摩擦阻 力而可以延長造粒機之壽命。 [解決課題之手段] 於是，依照本發明可以提供一種熱可塑性樹脂粒子之 製造裝置，此裝置具備： 擠壓機··將熱可塑性樹脂自有形成喷嘴於表面的喷嘴 擠壓模之喷嘴擠壓出熔融的熱可塑性樹脂； 冷卻室部：設置在喷嘴擠壓模表面側，以收容用以冷 卻自喷嘴擠壓出之樹脂的冷卻水； 切斷刀刃：具有藉由與設置在冷卻室部内的喷嘴擠壓 模之表面接觸同時旋轉而將由喷嘴擠壓出之已冷卻的樹 脂切斷成粒子狀之刀刃部； 旋轉驅動部：使切斷刀刃旋轉；以及 冷卻水循環系統：供應冷卻水至冷卻室部内並且與樹 脂粒子共同排出後，只將冷卻水在冷卻室部内循環； 其中，當設切斷刀刃之刃部厚度為t，喷嘴之直徑為 d時，滿足0<t/dS17之關係。 又，依本發明之另一觀點的話，本發明是提供一種製 造熱可塑性樹脂粒子的製造方法及熱可塑性樹脂粒子，該 製造方法係自前述之製造裝置中之擠壓機的喷嘴擠壓模之 喷嘴擠壓出熔融之熱可塑性樹脂後在冷卻室部内之冷卻水 中冷卻，並且使切斷刀刃旋轉而將已冷卻之樹脂切斷成粒 子狀的熱可塑性樹脂粒子的製造方法，及藉由此製造方法 而製造的熱可塑性樹脂粒子。 6 322579 201139098 [發明效果] 依本發明 _ .…可以抑制源自於刀斷不良所導致之不良粒 子的產生以及如有肉刺般劈裂的顆粒產生，同時， 低切斷刀刃與喷嘴擠壓模表面 斧 機之壽命。 卿^力而可以延長造粒 【實施方式】 [實施發明之最佳形態] 本發明之熱可塑性樹脂粒子製造裝置，係具備有： 擠壓機：將熱可塑性樹脂自有形成嘴嘴於表面的嘴嘴 擠壓模之噴嘴擠壓出熔融的熱可塑性樹脂； 、 冷卻室部：設置在喷嘴擠壓模表面側，以收容用以冷 卻自喷嘴擠壓出之樹脂的冷卻水； 7 切斷刀刀：具有藉由與設置在冷卻室部内的喷嘴擠壓 模之表面接觸同時旋轉而將由喷嘴擠壓出之已冷卻的樹 脂切斷成粒子狀之刀刀部； 旋轉驅動部：使切斷刀刀旋轉；以及 冷卻水循環系統：供應冷卻水至冷卻室部並且與樹脂 粒子共同排出後，只將冷卻水在冷卻室部内循環。 又，本說明書中，簡單稱為Γ樹脂」時，無特別限制 時是指「熱可塑性樹脂」。 該熱可塑性樹脂粒子之製造裝置（以下，稱為「樹脂粒 子製造裝置」），係以水中熱切方式的樹脂粒子製造裝置， 著眼於用於將自喷嘴擠壓出之樹脂切斷成粒子狀之主要部 分的切斷刀刃及喷嘴擠屢模’切斷刀刃係當將設其刀部厚 7 322579 201139098 噴嘴之直後為Μ，滿足〇<t/d^7之關係， 藉由Ϊ而可轉決前述以往技術丨及2有存在之問題。 月J述之比t/d為比17還大時，則切斷刀刃之刀部與 喷嘴擠壓模表面之接觸面積會變得過大 ，比起接觸面積7 、刀刀77以同&轉速度旋轉之情形施加於旋轉驅動部 ^嫩、-^達之動力源）之負荷會變大，旋轉驅動部之壽命 θ小* M I#斷7777之77部與喷嘴擠壓模表面接觸 之’、端卩77存在著有厚度，即使厚度很薄也會由於與喷嘴 擠壓模表面之摩擦以致厚度慢慢會變厚，*前述之W 比會變得比0大，但只要t/d比為17以下就可以。 4樹月曰粒子製造裝置進—步可以有如下述⑴至⑶之 結構，也可以組合這些要件。 (1)切斷刀刃與該刀刀部之喷嘴擠壓模表面的接觸部 厚度t為0· 2至5· 〇_ ’喷嘴之直徑d為〇, 3至h 〇随。 依此結構的話’可以一面製造粒徑0.3至1.5mm之微 顆粒’一面抑制使不良粒子及異物之發生率降低。 同時’本發明中，顆粒（樹脂粒子）由於是將自喷嘴出 來之柱狀樹脂切斷而形成者故不是正圓球狀。因此，在本 說明書中’顆粒之「粒徑」是指有關樣品數10個之顆粒截 斷面之（長彳至L +短徑d)/2的尺寸平均值的意思。 (2)切斷刀刀係該刀刃部之材料為具有洛式硬度HRC 為50至70之硬度’噴嘴擠壓模表面之材料具有洛式硬度 HRC為55以上之硬度。 此時’作為切斷刀刃及喷嘴擠壓模表面之材料者，例 8 322579 201139098 如可列舉如：WC-Co系、TiN-Ni系、TiC-Ni系之合金等。 同時，因為喷嘴擠壓模比切斷刀刀更高價，喷嘴擠壓 模表面之硬度以比切斷刀刃之刃部的硬度更硬者為佳，惟 這些材料之硬度只要在前述範圍内就沒有問題。 (3)旋轉驅動部是備有馬達、由馬達旋轉的旋轉軸、 與設置在冷卻室部内之旋轉軸尖端之切斷刀把（cutter ho 1 der)，切斷刀係在以切斷刀把的旋轉軸心為中心而向周 圍方向以等間隔設置複數片，喷嘴是以前述旋轉軸心為中 心而向周圍方向設置複數個。 做成如上述，就可以對應大量生產。 本發明之熱可塑性樹脂粒子的製造方法，係藉由自有 前述結構之樹脂粒子製造裝置中的擠壓機之喷嘴擠壓模的 喷嘴將熔融之熱可塑性樹脂擠壓出後，在冷卻室部内之冷 卻水中冷卻，並且使切斷刀旋轉而將已冷卻之樹脂切斷成 粒子狀而實施。 該樹脂粒子製造方法，並不限熱可塑性樹脂之種類， 可以是：聚苯乙烯系樹脂、聚乙烯系樹脂、聚丙烯系樹脂、 聚酯系樹脂、聚氯乙烯系樹脂、ABS樹脂、AS樹脂、亦可 以是單獨者或2種類以上、亦可以是經使用後而回收之樹 脂。尤其，具有破斷點速度為100至3000m/min之延伸性 而切斷困難之熱可塑性樹脂，例如，直鏈狀低密度聚乙烯 (LLDPE)、聚丙烯（PP)等之樹脂所成之粒徑為0. 3至1. 5_ 之樹脂粒子（微顆粒）的情形。也可在擠壓機内使熱可塑性 樹脂中含發泡劑，而作成發泡性樹脂粒子。 9 322579 201139098 又，此時之切斷刀刃之周速是以4至70m/s為合適。 同時，切斷刀刃之周速比4m/s慢時容易發生切斷不良， 超過70m/s時會變成負荷過重而不佳。 在此，破斷點速度係以下述條件測定之值。 測定裝置：twin-bore capillary rheometers (Rheologic 5000T義太利CEAST公司製）201139098 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a manufacturing apparatus and a manufacturing method for producing thermoplastic resin particles by a hot-cutting method in water. [Prior Art] Conventionally, as a method of producing thermoplastic resin particles, it is known that the resin in a molten state is extruded from a nozzle of a mold and then cooled and hardened in cooling water or cooling air. In addition, it is proposed to rotate the cutting blade to cut the cooled resin into pellets (for example, refer to Patent Documents 1 and 2, hereinafter referred to as the prior art 1 and 2). The prior art 1 is a granulator (pe 11 etizer) which is formed by using a high-hardness alloy having a Rockwell 1 hardness HRA of 89 or more and a bending strength of 180 kgf/mm 2 or more, even if The resin composition containing the high-hardness inorganic filler and the synthetic resin can be stably granulated without impairing the abrasion resistance. In the prior art 2, a surface insulating dies are used, and the molten resin fed into the extrusion die hole is extruded from the extruder and cut by a rotary cutter to produce a particle diameter of 0. 8 to 2. Omm small particles and spherical particles with high sphericity. At the same time, the blade of the rotary cutter is not in contact with the surface of the extrusion die, and the damage of the blade and the extrusion die can be prevented. Such a small-diameter resin particle (so-called "mi crope") is used to produce a foamed resin particle by impregnating a foaming agent. [Prior Art Document] 322579 201139098 (Patent Document) Patent Document 1: Japan [Problem to be Solved by the Invention] In the case of the prior art 1, a cutting blade made of a high hardness alloy is used. There is a problem that it is easy to wear the surface of the extrusion die and the life of the extrusion die is shortened', and a fine gap is formed between the cutting blade and the surface of the extrusion die due to damage caused on the surface of the extrusion die, and further When the cutting accuracy is lowered, as a result, there is a problem that the stranded foreign matter, the resin powder, and the two or more particles p connected as shown in Fig. 6 are generated to cause the connecting particles c. In the case of the prior art 2, When the resin (for example, olefin-based resin) is difficult to be diced, when the blade of the rotary blade is not in contact with the surface of the mold, the cutting failure may occur. If it is hot-cut in water In the prior art 2, when the blade of the rotary blade is brought into contact with the surface of the extrusion die to cut the microparticles having a small diameter (especially 丨·5 mm or less), since the number of rotations of the rotary blade is set rapidly, the rotation time is made. The necessary current value is increased. At this time, when the contact area between the blade and the extrusion die is large, the frictional resistance is also increased, and the motor load for driving the rotation of the rotary tool becomes shorter than the life of the granulator. The present invention has been made in view of the above problems, and an object of the present invention is to provide a manufacturing apparatus and a manufacturing method for producing resin particles, which can suppress the production of defective particles caused by poor cutting. 5 322579 201139098, at the same time, can reduce the frictional resistance of the cutting blade and the surface of the nozzle extrusion die to extend the life of the granulator. [Means for Solving the Problem] Thus, according to the present invention, a thermoplastic resin particle can be provided. a manufacturing apparatus comprising: an extruder comprising: a thermoplastic resin extruded from a nozzle of a nozzle extrusion die having a nozzle formed on a surface; and a cold thermoplastic resin; a chamber portion disposed on a surface side of the nozzle extrusion die to accommodate cooling water for cooling the resin extruded from the nozzle; the cutting blade having a surface contact with the nozzle extrusion die disposed in the cooling chamber portion Rotating to cut the cooled resin extruded by the nozzle into a pellet-shaped blade portion; rotating the driving portion: rotating the cutting blade; and cooling water circulation system: supplying cooling water to the cooling chamber portion and discharging it together with the resin particles Only the cooling water is circulated in the cooling chamber portion; wherein, when the thickness of the blade portion of the cutting blade is t and the diameter of the nozzle is d, the relationship of 0 < t / dS 17 is satisfied. Further, according to another aspect of the present invention In the meantime, the present invention provides a method for producing thermoplastic resin particles and a thermoplastic resin particle which is extruded from a nozzle of a nozzle extrusion die of an extruder in the above-described manufacturing apparatus to extrude a molten thermoplastic resin. After that, it is cooled in the cooling water in the cooling chamber portion, and the cutting blade is rotated to cut the cooled resin into pelletized thermoplastic resin particles. Method, the thermoplastic resin particles and by the manufacturing method and manufacturing. 6 322579 201139098 [Effect of the Invention] According to the present invention, it is possible to suppress generation of defective particles due to poor cutting of the blade and generation of particles such as spurs, and at the same time, low cutting blade and nozzle extrusion die The life of the surface axe. EMBODIMENT OF THE INVENTION [The best mode for carrying out the invention] The apparatus for producing a thermoplastic resin particle of the present invention comprises: an extruder: a thermoplastic resin is formed on the surface by itself. a nozzle of the nozzle extrusion die extrudes the molten thermoplastic resin; and a cooling chamber portion: disposed on the surface of the nozzle extrusion die to receive cooling water for cooling the resin extruded from the nozzle; 7 cutting knife Knife: a blade portion that cuts the cooled resin extruded by the nozzle into a particle shape by being rotated while contacting the surface of the nozzle extrusion die provided in the cooling chamber portion; the rotary drive portion: the cutter Knife rotation; and cooling water circulation system: After supplying cooling water to the cooling chamber portion and discharging it together with the resin particles, only the cooling water is circulated in the cooling chamber portion. Further, in the present specification, when it is simply referred to as "rubber resin", it is referred to as "thermoplastic resin" unless otherwise specified. The apparatus for producing a thermoplastic resin particle (hereinafter referred to as "resin particle production apparatus") is a device for producing a resin pellet which is eagerly cut in water, and is intended to cut a resin extruded from a nozzle into a pellet shape. The main part of the cutting blade and the nozzle extrusion die 'cutting blade edge will be set to its blade thickness 7 322579 201139098 nozzle straight after the Μ, to meet the relationship 〇 < t / d ^ 7, can be transferred by Ϊ There are problems with the aforementioned prior art and 2. When the ratio t/d of the month J is larger than 17 , the contact area between the blade portion of the cutting blade and the surface of the nozzle extrusion die becomes too large, and the blade area 77 is rotated by the same as the contact area 7 When the speed is rotated, the load applied to the rotary drive unit is increased, and the life of the rotary drive unit is small. * MI# breaks 77 parts of 7777 and contacts the surface of the nozzle extrusion die. The end 卩 77 has a thickness, and even if the thickness is thin, the thickness gradually becomes thick due to friction with the surface of the nozzle extrusion die. * The aforementioned W ratio becomes larger than 0, but as long as the t/d ratio is 17 or less is fine. The 4 tree sap particle manufacturing apparatus may have the following structures (1) to (3), and these elements may be combined. (1) The contact portion between the cutting blade and the nozzle extrusion die surface of the blade portion has a thickness t of 0·2 to 5· 〇 _ ' The diameter d of the nozzle is 〇, 3 to h 〇. According to this configuration, it is possible to prevent the occurrence of defective particles and foreign matter from being lowered while producing microparticles having a particle diameter of 0.3 to 1.5 mm. Meanwhile, in the present invention, since the particles (resin particles) are formed by cutting the columnar resin from the nozzle, they are not in a perfect spherical shape. Therefore, in the present specification, the "particle diameter" of the particles means the average value of the size of the particle cross section of 10 samples (long 彳 to L + short diameter d)/2. (2) The cutter blade is made of a material having a Rockwell hardness HRC of 50 to 70. The material of the nozzle extrusion die has a hardness of 55 or more. In this case, as a material for cutting the blade edge and the surface of the nozzle extrusion die, examples of the case of the example 8 322579 201139098 include a WC-Co system, a TiN-Ni system, and a TiC-Ni alloy. At the same time, since the nozzle extrusion die is more expensive than the cutting blade, the hardness of the nozzle extrusion die surface is preferably harder than the hardness of the blade edge of the cutting blade, but the hardness of these materials is not within the aforementioned range. problem. (3) The rotary drive unit is a cutter having a motor, a rotary shaft that is rotated by the motor, and a tip of the rotary shaft provided in the cooling chamber portion, and the cutter is coupled to the cutter to rotate the cutter. A plurality of sheets are arranged at equal intervals in the peripheral direction around the axis, and a plurality of nozzles are provided in the peripheral direction around the rotation axis. As described above, it can be produced in large quantities. In the method for producing the thermoplastic resin particles of the present invention, the molten thermoplastic resin is extruded from the nozzle of the nozzle extrusion die of the extruder in the resin particle manufacturing apparatus having the above-described structure, and then in the cooling chamber portion. The cooling water is cooled, and the cutting blade is rotated to cut the cooled resin into particles. The method for producing the resin particles is not limited to the type of the thermoplastic resin, and may be a polystyrene resin, a polyethylene resin, a polypropylene resin, a polyester resin, a polyvinyl chloride resin, an ABS resin, or an AS resin. Further, it may be a single one or two or more types, or may be a resin recovered after use. In particular, a thermoplastic resin having a breaking point at a breaking point of 100 to 3000 m/min and having difficulty in cutting, for example, a resin such as a linear low-density polyethylene (LLDPE) or a polypropylene (PP). The case of the resin particles (microparticles) having a diameter of 0.3 to 1.5. It is also possible to form a foaming agent in the thermoplastic resin by using a foaming agent in the extruder. 9 322579 201139098 Also, the peripheral speed of the cutting blade at this time is 4 to 70 m/s. At the same time, when the peripheral speed of the cutting blade is slower than 4 m/s, the cutting failure is likely to occur, and when it exceeds 70 m/s, the load becomes too heavy. Here, the breaking point velocity is a value measured under the following conditions. Measuring device: twin-bore capillary rheometers (Rheologic 5000T Yitai Lee CEAST company)
試驗溫度：210°C 毛細管形狀：A外套管徑15賴、模徑1 mm、模長度1 Omm 流入角度90度（Konica) 擠出速度：〇. 0773 mm/s (Q== 0. 75g/min) 捲起速度：以初速17. 4mm/s，以12mm/s2加速 同時’由於本發明可由具前述展性而切斷困難之熱可 塑性樹脂’製造出可以減少像連結粒子般之不良粒子的微 顆粒，只要在比此範圍之延伸性更低之容易切斷之樹脂就 可以製造不良粒子更為降低之微顆粒。 [實施例] 以下，一面參照圖面一面說明本發明之具體實施形 態。 第1圖是表示本發明之熱可塑性樹脂粒子之製造裝置 的一個實施形態結構圖，第2圖是表示第1圖之製造裝置 中的喷嘴擠壓模的概略結構側面截面圖，第3圖是表示第 1圖之製造裝置中的喷嘴擠壓模的正面圖，第4圖（A)及（B) 是表示實施形態之製造裝置中切斷刀刃與喷嘴擠壓模表 面之接觸部分的截面圖，第5圖（A)及（B)是說明在第4圖 10 322579 201139098 (A)之切辦 如刀切斷樹脂狀態的截面圖。 裝置是轉由★，第2圖所讀熱可塑性料 瑞彻丨呈念7中熱切方式而造粒之1#壯&日粒子之製造 2 1 ^ ^ 將由嘴嘴擠蜃模1 /、有料斗21之擠壓 :mr:冷卻的小室(冷 ^ k樹赌吐出面於收容 =勒乃30的刀具3、將刀且3亂1 刀斷成粒子狀之具有 用以使;二_之沒有圖示的旋 it展6,卻水循環系統。4内循環之管路Test temperature: 210 ° C Capillary shape: A outer casing diameter 15 Å, die diameter 1 mm, die length 1 Omm Inflow angle 90 degrees (Konica) Extrusion speed: 〇. 0773 mm / s (Q == 0. 75g / Min) Winding speed: at a initial velocity of 17.4 mm/s, accelerated at 12 mm/s2 and at the same time, 'the thermoplastic resin which can be severely cut by the aforementioned expansion can be used to reduce the defective particles like the particles. The fine particles can be made into fine particles having less defective particles as long as the resin is easily cut at a lower extensibility than this range. [Embodiment] Hereinafter, a specific embodiment of the present invention will be described with reference to the drawings. 1 is a structural view showing an embodiment of a manufacturing apparatus of a thermoplastic resin particle of the present invention, and FIG. 2 is a side cross-sectional view showing a schematic configuration of a nozzle extrusion die in the manufacturing apparatus of Fig. 1, and Fig. 3 is a view Fig. 4(A) and (B) are cross-sectional views showing a contact portion of a cutting blade and a nozzle extrusion die surface in the manufacturing apparatus of the embodiment, showing a front view of a nozzle extrusion die in the manufacturing apparatus of Fig. 1. Fig. 5 (A) and (B) are cross-sectional views showing the state in which the resin is cut by a knife in Fig. 4 322579 201139098 (A). The device is rotated by ★, the thermoplastic material read in Fig. 2, the rhyme 丨 丨 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 Extrusion of bucket 21: mr: cooling chamber (cold ^ k tree gambling spit surface in the container = Le Nai 30 tool 3, the knife and 3 chaos 1 knife broken into particles like to make; The illustrated rotation shows 6, but the water circulation system. 4 inner circulation pipeline
擠壓模C T及喷嘴擠髮模1(以下稱為「N 將吐造粒用 而其=侧面當作「後端」或「後t，或「前方」， 在小室4是遠社、人"便方」加以說明。 路5 ’讀管略5之;（在小=水（循環水）流動之前述管 =僧7。又，在管路5之/一游：二由送水粟6 权置有用於將熱可塑性 知（在小至4下游側） 燥之脫水處理心j 自冷卻水分離、脫水-乾 熱可塑性樹㈣ 理部8分離、脫水~乾燥之 μ曰极子係送到容器9。 乂 本體二第所示，造粒刪模1是由_模 holdeiOll所槿出域2之前端側的擠壓模托架. 12固定在擠壓模托架1】之前端側。 擠壓模托架11係設置成連接在擠壓機2之筒體 322579 11 201139098 (cylinder)，由後端側向前端側以後端侧流路1 la、前端 側流路11 b之順序形成。 擠壓模本身10是在後端面中央部形成有向後方側突 出之圓錐狀凸部10a，並以擠壓模本體10與擠壓模托架 11成為相互連接狀態，將圓錐狀凸部l〇a以保持一定之間 隙之方式插入於擠壓模托架11之前端侧流路lib内。 亦即成為使通過擠壓模托架11之後端侧流路11a之 樹脂，沿著前端侧流路11b中之圓錐狀凸部l〇a的周面流 動，而連通至開口於擠壓模本體1〇之後端面之複數條樹 脂流路14(後述）之構造。 擠壓模本體10係具備在其前端面與水流接觸之前述 樹脂吐出面13、用於將由擠壓機2所擠壓出之樹脂向樹脂 吐出面13移送之前述複數條的樹脂流路丨4、設在複數條 樹脂流路14而開口於樹脂吐出面13之複數個喷嘴15,以 及設在比樹脂吐出面更靠擠壓機2方之位置而用以加溫樹 脂吐出面13、樹脂流路14以及擠壓模本體1〇之加熱器 18，而構成其概略之架構。 加熱器18可自習知之匣式加熱器（cartridge heater) 適當地選擇適合擠壓模本體丨〇之大小與形狀者而使用。 換言之’加熱器18，可以使用例如：將在棒狀之陶竟 上捲繞之發熱線（鎳鉻線）插入於管（耐熱不銹鋼）中，將發 熱線與管之間隙以高熱傳導性與高絕緣性優異的材料 (MgO)密封’成電力密度高的棒狀加熱器。 樹脂流路14與樹脂吐出面13成垂直方向延伸，同 12 322579 201139098 時’係沿著以擠壓模本體10之中心軸線P為中心的圓周 (在樹脂吐出面13上描繪之圓周）以一定間隔方式配置。 喷嘴15係沿著描繪於樹脂吐出面13上之圓周以一定 之間隔配置。更詳細而言，喷嘴丨5係在樹脂流路14之斷 面形狀的範圍内任意配置複數的單體喷嘴l5a、15b、15c... 而成為喷嘴單元（在本發明中將其稱為「喷嘴」）。 各單體噴嘴15a、15b、15c…的配置方法為例如，可 以採用在複數的小圓周上多數並列者等，但並不限定於如 此之配置形態，孔之斷面形狀也沒有限定為圓形，也可以 是楕圓形或四角形等形狀。 喷嘴15之孔徑d是可以適當設定為能得到因應最終 微顆粒之大小者，例如可以是〇 · 3至丨· 〇 mm左右。 刀具3具有：在旋轉中心有旋轉軸之支撐機構，與在 該支撐機構的周圍方向以一定間隔安裝有前述複數的切 斷刀刃30。 旋轉軸係在與擠壓模本體1〇之中心軸線p 一致之軸 線上配旦，其一端與支撐把手連結，另一端係設在小室4 中以液密狀態插通孔而突出在外部。 切斷刀30之數目並無特別限定，例如，可以與前述 之喷嘴單元相同數目。 ^ ' 切斷刀刃30之刀部30a之形狀並無特別限定，與刃 部30a之樹脂吐出面13的接觸部分厚度t ,與喷嘴直 徑d之比t/d只要能滿足〇<t/(^17之關係即可 如，可以如第4圖(A)所示，有一定厚度之形狀，或如第4 322579 13 201139098 圖（B)所示，面向接觸部分為變薄之形狀。 於是，刃部30a之厚度t，d以能滿足0<t/dS17 之關係者為宜，例如，喷嘴15之孔徑d為0. 3至1. Omm 時，可以將刃部30a之厚度t設成0. 2至5. Omm左右。 在圖中未顯示之旋轉驅動部是設置在小室4之外側， 而與刀具3之旋轉軸連結。 又，在小室4之外側設有在圖中未顯示之支撐機構， 該支撐機構係可以使刀具3與旋轉驅動部向旋轉軸之方向 移動，並且使切斷刀30向擠壓模本體10之樹脂吐出面13 以一定之壓力按壓之狀態下可以支撐的結構。同時，將切 斷刀刃30向擠壓模本體10之樹脂吐出面13按壓時的壓 力，並無特別之限定，但例如以在0至2 bar左右為適當， 通常是0. 5至1. 0 bar。 依據如上述之結構之樹脂粒子製造裝置，例如，如第 5圖（A)所示，藉由使切斷刀刃30向自喷嘴15擠出冷卻水 W中之樹脂R移動，即可如第5圖（B)所示，以刃部30a切 斷樹脂R而製造樹脂粒子r。 切斷後自喷嘴15擠出之樹脂R也連續藉由切斷刀刃 30來切斷，而重覆該切斷製程以製造大量之樹脂粒子r。 實施例 使用在第1圖至第5圖說明之樹脂粒子製造裝置，以 表1所示之條件，分別製造實施例1至5及比較例1至2 之樹脂粒子500 kg。 此時，在實施例1至5及比較例1至2中，切斷刀刃 14 322579 201139098 之刃部的洛式（Rockwel 1)硬度HRC是58，喷嘴擠廢模表面 之洛式（Rockwell)硬度HRC是60，切斷刀刃對喷嘴擠壓模 表面之按壓壓力是0.5 bar。 各實施例及比較例中之造粒機電流值，樹脂粒子的粒 子徑、連結粒子數之適合否，調查顆粒形狀及有肉刺般劈 裂之顆粒數目，將此等之結果在表1中表示。 造粒機電流值是用以驅動旋轉驅動部之馬達的必要 電流值，而以10A以下為佳。 連結粒子數（％)係指可以判定不良率的值，藉由下述 之式子計算。 連結粒子數連結粒子之個數/(lOgxlOO粒/顆 粒100粒的重量）（g)]xl00 顆粒形狀為粒子狀者以「良」來表示。 顆粒合適否之判定係將連結粒子數未滿0. 2%時當作 合格（優）「◎」來表示，未滿0· 2至2%當作合格（良）而以 「〇」來表示，2%以上當作不合格而以「X」來表示。 有肉刺般劈裂之顆粒數，係抽出所製造之顆粒100個 時之有肉刺般劈裂顆粒之個數比例（％)。 同時，在此「有肉刺般劈裂」是指當藉由切斷刀刃切 斷自喷嘴擠出之樹脂時所發生之切碎破損，顆粒切斷的地 方呈鬍鬚狀物，定義為顆粒徑之10%以上之長度者。 15 322579 201139098 表1Extrusion die CT and nozzle extrusion die 1 (hereinafter referred to as "N will spit granulation and its = side as "back end" or "back t, or "front", in the small room 4 is far society, person " "Let's explain". Road 5 'Read tube slightly 5; (in small = water (circulating water) flow of the above tube = 僧 7. Also, in the pipeline 5 / one tour: two by the water supply mill 6 right There is a dehydration treatment for drying the thermoplasticity (on the downstream side as small as 4), separation from the cooling water, dehydration-dry heat plasticity tree (4) separation, dehydration and drying of the μ曰 poles to the container 9. As shown in Fig. 2, the granulation die-cut 1 is an extrusion die holder on the front end side of the field 2 by the _mode holdeiOll. 12 is fixed on the front side of the extrusion die holder 1]. The die holder 11 is provided so as to be connected to the cylindrical body 322579 11 201139098 (cylinder) of the extruder 2, and is formed in the order from the rear end side to the front end side rear end side flow path 1 la and the front end side flow path 11 b. The mold itself 10 is formed with a conical convex portion 10a projecting toward the rear side at the center portion of the rear end surface, and the extrusion die body 10 and the extrusion die holder 11 are connected to each other. The conical convex portion 10a is inserted into the end side flow path lib of the extrusion die holder 11 so as to maintain a constant gap. That is, the resin which passes through the end side flow path 11a after the extrusion die holder 11 is formed. It flows along the circumferential surface of the conical convex portion 10a in the distal end side flow path 11b, and communicates with a structure of a plurality of resin flow paths 14 (described later) that are opened to the end surface of the extrusion die body 1〇. The main body 10 includes the resin discharge surface 13 that is in contact with the water flow on the front end surface thereof, and the plurality of resin flow paths 4 for transferring the resin extruded from the extruder 2 to the resin discharge surface 13 . a plurality of nozzles 15 that are opened to the resin discharge surface 13 by a plurality of resin flow paths 14 and a plurality of nozzles 15 that are disposed closer to the extruder than the resin discharge surface for heating the resin discharge surface 13 and the resin flow path 14 The heater 18 of the die body 1 is formed to constitute a schematic structure thereof. The heater 18 can be used by appropriately selecting a size and shape suitable for the body of the die from a conventional cartridge heater. In other words 'heater 18, you can use, for example: will The rod-shaped ceramic is wound into a heating wire (nickel-chromium wire) inserted in a tube (heat-resistant stainless steel), and the gap between the heating wire and the tube is sealed with a material having high thermal conductivity and high insulation (MgO). A rod-shaped heater having a high density. The resin flow path 14 extends in a direction perpendicular to the resin discharge surface 13 and is along the circumference centered on the central axis P of the extrusion mold body 10 at 12 322579 201139098 (on the resin discharge surface) The circumference drawn on the line 13 is arranged at a constant interval. The nozzles 15 are arranged at regular intervals along the circumference drawn on the resin discharge surface 13. More specifically, the nozzles 5 are arbitrarily arranged in a plurality of unit nozzles 15a, 15b, 15c, ... in the cross-sectional shape of the resin flow path 14 to become nozzle units (referred to as "in the present invention" nozzle"). The arrangement method of each of the unit nozzles 15a, 15b, 15c, ... may be, for example, a plurality of juxtaposed on a plurality of small circumferences, but the arrangement is not limited to such an arrangement, and the cross-sectional shape of the holes is not limited to a circular shape. It can also be a shape such as a circle or a quadrangle. The diameter d of the nozzle 15 can be appropriately set so as to obtain the size of the final fine particles, and may be, for example, about 〇 3 to 丨· 〇 mm. The cutter 3 has a support mechanism having a rotary shaft at the center of rotation, and the plurality of cutting blades 30 are attached to the peripheral direction of the support mechanism at regular intervals. The rotating shaft is coupled to a shaft line coincident with the center axis p of the main body 1 of the extrusion die, and one end thereof is coupled to the support handle, and the other end is provided in the small chamber 4 to be inserted into the through hole in a liquid-tight state to protrude outside. The number of the cutting blades 30 is not particularly limited and, for example, may be the same as the number of the nozzle units described above. The shape of the blade portion 30a of the cutting blade 30 is not particularly limited, and the ratio t/d of the thickness t of the contact portion with the resin discharge surface 13 of the blade portion 30a to the nozzle diameter d is sufficient to satisfy 〇<t/( The relationship of ^17 can be, for example, as shown in Fig. 4(A), having a certain thickness, or as shown in Fig. 4 322579 13 201139098 (B), the contact-facing portion is in a thinned shape. The thickness t, d of the blade portion 30a is preferably such that it can satisfy the relationship of 0 < t / dS17. For example, when the aperture d of the nozzle 15 is 0.3 to 1.0 mm, the thickness t of the blade portion 30a can be set to 0. 2 to 5. Omm or so. The rotary drive unit not shown in the figure is disposed on the outer side of the small chamber 4 and coupled to the rotary shaft of the cutter 3. Further, on the outer side of the small chamber 4, a support not shown in the drawing is provided. The support mechanism is a structure that can move the cutter 3 and the rotary drive unit in the direction of the rotary shaft, and can support the cutter blade 30 in a state where the resin discharge surface 13 of the die body 10 is pressed with a certain pressure. At the same time, there is no special pressure when the cutting blade 30 is pressed against the resin discharge surface 13 of the extrusion die body 10. The resin particle manufacturing apparatus according to the above structure is, for example, as shown in FIG. 5(A), by using, for example, about 0 to 2 bar, and is usually 0.5 to 1.0 bar. When the cutting blade 30 is moved to the resin R extruded from the nozzle 15 in the cooling water W, the resin R can be cut by the blade portion 30a as shown in Fig. 5(B) to produce the resin particles r. The extruded resin R is also continuously cut by the cutting blade 30, and the cutting process is repeated to produce a large amount of resin particles r. The embodiment uses the resin particle producing apparatus described in Figs. 1 to 5 500 kg of the resin particles of Examples 1 to 5 and Comparative Examples 1 to 2 were respectively produced under the conditions shown in Table 1. At this time, in Examples 1 to 5 and Comparative Examples 1 to 2, the cutting blade 14 322579 was cut. The Rockwell 1 hardness HRC of the blade of 201139098 is 58, the Rockwell hardness HRC of the nozzle extrusion die surface is 60, and the pressing pressure of the cutting blade to the nozzle extrusion die surface is 0.5 bar. In the examples and comparative examples, the granulator current value, the particle diameter of the resin particles, and the number of connected particles are investigated. The particle shape and the number of particles having a spur-like splitting are shown in Table 1. The granulator current value is a necessary current value for driving the motor of the rotary drive unit, and preferably 10 A or less. The number of particles (%) refers to a value at which the defect rate can be determined, and is calculated by the following formula: Number of connected particles Number of connected particles / (lOg x 100 particles / weight of 100 particles) (g)] The shape of the particles is Particles are represented by "good". The determination of whether the particles are suitable or not is based on the fact that the number of connected particles is less than 0.2% as qualified (excellent) "◎", and less than 0. 2 to 2% is regarded as qualified (good) and expressed as "〇" 2% or more is deemed to be unqualified and is represented by "X". The number of particles with a spur-like split is the ratio (%) of the spur-like splitting granules when the granules produced by the granules are extracted. At the same time, "there is a spur-like split" refers to the shredding damage that occurs when the resin extruded from the nozzle is cut by cutting the blade, and the place where the particles are cut is a whisker, which is defined as the particle diameter. 10% or more in length. 15 322579 201139098 Table 1
Cv5 鎰 封 CO CO 00 LO LO C0 d ο (N Ο LC CVJ x CM 漩 ftal 瞭 1 LO CO ί-Η U3 •cu 3 1 雄 ML· 〇 to ο lh 1 1 x κ- ίΗ 1 U5 cu a- o T-H in o LO Ο LA CM ο ο «—Η· CD 卜 Ο LO w〇 〇 »-Η 寸 c ω CO CO CO o ca (D 〇· LO ιο 00 ζ〇 0¾ ο CO ^〇 o C0 CO ik CO cu CO 寸 o 卜 Ο ο <£> ο o 5 ◎ o to CM ω Dh o to cd o in CO d c^a Ο Ο 00 CO c> CO ^〇 00 ^•4 Pl, Q s o oa d ο T—( 0¾ 00 CSJ τ—< c^a 二◎ o in •lBul w 鸽 % T3 \ •H +-> 時 Φ 雄 f? •*w/ XJ ψ κ S 械 Μ 4 Ν—✓ 屮 u /-—s g u 4 睇 δ 想 睇 € 16 322579 201139098 切斷刀刀之刃部接觸部分的厚度t與喷嘴直徑d之比 t/d為〇<t/dS17的關係能滿足的實施例1至5，係未 達連結粒子數2 %，並且可以抑制有肉刺般劈裂顆粒在未 達20 %之樹脂粒子的製造，同時造粒機電流值也可以抑制 在10. 0 A以下。 相對於此’在切斷刀刃與擠壓模本體之樹脂吐出面為 非接觸之比較例1，自喷嘴吐出之樹脂纏繞於切斷刀刃而 不能切斷成顆粒形狀。 而且，在t/d比超過π之比較例2，連結粒子數為 2%以上，並且有肉刺般劈裂之顆粒增加到35%，故不適合 製造任何的樹脂粒子。 【圖式簡單說明】 第1圖是表示本發明之熱可塑性樹脂粒子之製造裝置 的一個實施形態結構圖。 第2圖是表示第丨圖之製造裝置的喷嘴塑模的概略結 構側面截面圖。 第3圖是表示第丨圖之製造裝置的喷嘴塑模的正面圖。 第4圖（A)及（B)是表示實施形態之製造裝置中切斷刀 刀與噴嘴塑模表面之接觸部分的截面圖。 第5圖（A)及（B)疋說明在第4圖（A)之切斷刀刃切斷 樹脂狀態的截面圖。 第6圖是表示聯繫2個以上顆粒之連結粒子之概念圖。 【主要元件符號說明】 1 喷嘴擠壓模（造粒用擠壓模） 322579 17 201139098 2 擠壓機 3 刀具 4 小室（冷卻室部） 5 管路 6 送水泵 7 水槽 8 脫水處理部 9 容器 10 擠壓模本體 10a 圓錐狀凸部 11 擠壓模托架 11a 後端側流路 lib 前端侧流路 13 樹脂吐出面 14 樹脂流路 15喷嘴 15a、 15b、15c··· 單體噴嘴 21 料斗 30 切斷刀刃 30a 刃部 d 喷嘴之直徑 P 中心軸線 R 樹脂 r 樹脂粒子 T 造粒裝置 t 與刃部樹脂吐出面的接觸部分之厚度 W 冷卻水 18 322579Cv5 CO封CO CO 00 LO LO C0 d ο (N Ο LC CVJ x CM 旋旋了1 LO CO ί-Η U3 •cu 3 1 雄ML· 〇to ο lh 1 1 x κ- Η 1 U5 cu a- o TH in o LO Ο LA CM ο ο «—Η· CD Ο Ο LO w〇〇»-Η inch c ω CO CO CO o ca (D 〇· LO ιο 00 ζ〇03⁄4 ο CO ^〇o C0 CO ik CO cu CO 寸 o Ο ο <£> ο o 5 ◎ o to CM ω Dh o to cd o in CO dc^a Ο Ο 00 CO c> CO ^〇00 ^•4 Pl, Q so oa d ο T—( 03⁄4 00 CSJ τ—< c^a 2 ◎ o in • lBul w Pigeon % T3 \ •H +-> When Φ male f? •*w/ XJ ψ κ S Μ 4 Ν—✓屮u /--sgu 4 睇δ想睇 € 16 322579 201139098 The ratio t/d of the thickness t of the blade contact portion of the cutting blade to the nozzle diameter d is 〇<t/dS17 1至5, is less than 2% of the number of connected particles, and can inhibit the production of spur-like splitting particles in less than 20% of the resin particles, while the granulator current value can also be suppressed below 10. 0 A. Here, the cutting edge of the cutting blade and the resin ejection surface of the extrusion die body are non-contact. In Comparative Example 1, the resin discharged from the nozzle was wound around the cutting blade and could not be cut into a pellet shape. Further, in Comparative Example 2 in which the t/d ratio exceeded π, the number of bonded particles was 2% or more, and there was a spurt-like split. Since the particles are increased to 35%, it is not suitable for the production of any resin particles. [Brief Description of the Drawings] Fig. 1 is a block diagram showing an embodiment of a manufacturing apparatus of the thermoplastic resin particles of the present invention. Fig. 3 is a front view showing a nozzle mold of a manufacturing apparatus of a second drawing. Fig. 4 (A) and (B) are views showing the manufacture of the embodiment. A cross-sectional view of a portion where the cutting blade is in contact with the surface of the nozzle mold in the apparatus. Fig. 5(A) and (B) are cross-sectional views showing the cutting state of the cutting blade in Fig. 4(A). Figure 6 is a conceptual diagram showing the connection of two or more particles. [Main component symbol description] 1 Nozzle extrusion die (extrusion die for granulation) 322579 17 201139098 2 Extruder 3 Tool 4 chamber (cooling chamber) ) 5 pipe 6 water pump 7 water Slot 8 Dehydration processing unit 9 Container 10 Extrusion die body 10a Conical projection 11 Extrusion die holder 11a Rear end side flow path lib Front end side flow path 13 Resin discharge surface 14 Resin flow path 15 nozzles 15a, 15b, 15c· · Single nozzle 21 Hopper 30 Cutting blade 30a Cutting edge d Nozzle diameter P Center axis R Resin r Resin particle T Thickness of contact portion of granulation device t with blade resin discharge surface W Cooling water 18 322579