TW201601893A - Pretreatment method and pretreatment device of molding material, injection molding machine, and injection molding method - Google Patents
Pretreatment method and pretreatment device of molding material, injection molding machine, and injection molding method Download PDFInfo
- Publication number
- TW201601893A TW201601893A TW104121155A TW104121155A TW201601893A TW 201601893 A TW201601893 A TW 201601893A TW 104121155 A TW104121155 A TW 104121155A TW 104121155 A TW104121155 A TW 104121155A TW 201601893 A TW201601893 A TW 201601893A
- Authority
- TW
- Taiwan
- Prior art keywords
- molding material
- temperature
- container
- cooling
- molding
- Prior art date
Links
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Manufacturing & Machinery (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
Abstract
Description
本發明係有關一種被供給到成形機的成形材料的預處理方法及預處理裝置，和在使經過預處理的成形材料熔融之後將其射出到模具內的射出成形機及射出成形方法。 The present invention relates to a pretreatment method and a pretreatment apparatus for a molding material supplied to a molding machine, and an injection molding machine and an injection molding method for ejecting the pretreated molding material into a mold after being melted.
以往，在樹脂產品的製程中，對於被供給到射出成形機的樹脂顆粒等成形材料進行乾燥等預處理。關於成形材料的預處理，例如在專利文獻1中有記載。在專利文獻1的裝置中，芯片或顆粒狀的樹脂材料經過除濕乾燥機、惰性氣體滲透裝置以及料斗之後被供給到射出成形機的可塑化裝置(參閱第1圖)。 Conventionally, in the process of a resin product, a molding material such as resin pellets supplied to an injection molding machine is subjected to pretreatment such as drying. The pretreatment of the molding material is described, for example, in Patent Document 1. In the apparatus of Patent Document 1, a chip or a granular resin material is supplied to a plasticizer of an injection molding machine after passing through a dehumidifying dryer, an inert gas permeating device, and a hopper (see Fig. 1).
專利文獻1：日本特開2001-353750號公報 Patent Document 1: Japanese Laid-Open Patent Publication No. 2001-353750
專利文獻2：日本特開平10-87752號公報 Patent Document 2: Japanese Patent Laid-Open No. Hei 10-87752
然而，若被供給到射出成形機的成形材料氧化，則成形後的樹脂產品中會產生黃變等變色。因此，習知之預處理裝置中，藉由對積存成形材料的料斗的內部供給作為惰性氣體之氮氣等而抑制成形材料的氧化。 However, when the molding material supplied to the injection molding machine is oxidized, discoloration such as yellowing occurs in the resin product after molding. Therefore, in the conventional pretreatment apparatus, oxidation of the molding material is suppressed by supplying nitrogen gas or the like as an inert gas to the inside of the hopper in which the molding material is accumulated.
並且，在專利文獻2中記載有藉由在惰性氣體環境下保管樹脂顆粒而降低在樹脂顆粒中所含有之氧量。若如此降低成形材料中的氧的含量，另外，使成形材料中含有惰性氣體，則在將該成形材料供給到射出成形機之後，即使在射出成形機內熔融及射出的過程中亦能夠抑制成形材料的氧化。 Further, Patent Document 2 describes that the amount of oxygen contained in the resin particles is reduced by storing the resin particles in an inert gas atmosphere. When the content of oxygen in the molding material is lowered in this manner, and the inert gas is contained in the molding material, the molding material can be prevented from being formed even after being melted and injected in the injection molding machine after the molding material is supplied to the injection molding machine. Oxidation of materials.
然而，近幾年，對於使用於光學組件的樹脂產品等，要求品質進一步提高，且要求能夠進一步抑制因氧化而產生之變色的技術。 However, in recent years, a resin product or the like used for an optical component is required to further improve the quality, and a technique capable of further suppressing discoloration due to oxidation is required.
本發明是鑑於這種情況而完成的，其目的在於提供一種藉由增加成形材料中的惰性氣體的含量而能夠進一步抑制成形時成形材料之氧化的成形材料的預處理方法、預處理裝置、射出成形機及射出成形方法。 The present invention has been made in view of the above circumstances, and an object thereof is to provide a pretreatment method, a pretreatment apparatus, and an injection molding of a molding material capable of further suppressing oxidation of a molding material during molding by increasing the content of an inert gas in a molding material. Forming machine and injection molding method.
本申請案的第1發明係一種被供給到成形機的成形材料的預處理方法，前述成形材料的預處理方法具有：a)藉由加熱成形材料而使其乾燥的製程；b)在前述製程a)之後，在填充有惰性氣體之容器內，使成形材料的溫 度降低的製程；及c)在前述製程b)之後，對前述成形機供給成形材料的製程，在前述製程b)中，將前述容器內之壓力維持大致恆定，並使成形材料的溫度降低。 The first invention of the present application is a pretreatment method of a molding material supplied to a molding machine, and the pretreatment method of the molding material has a process of: a) drying by heating the molding material; b) in the foregoing process a) after the temperature of the forming material in a container filled with an inert gas And a process for supplying a molding material to the molding machine after the process b), in the process b), maintaining the pressure in the container substantially constant and lowering the temperature of the molding material.
本申請案的第2發明係第1發明的成形材料的預處理方法，其中，在前述製程b)中，使成形材料的溫度比自然冷卻更緩慢地降低。 According to a second aspect of the invention, in the method of pretreating a molding material according to the first aspect of the invention, in the process (b), the temperature of the molding material is lowered more slowly than the natural cooling.
本申請案的第3發明係被供給到成形機的成形材料的預處理方法，其特徵為具有：a)藉由加熱成形材料而使其乾燥的製程；b)在前述製程a)之後，在填充有惰性氣體之容器內，使成形材料的溫度降低的製程；及c)在前述製程b)之後，對前述成形機供給成形材料的製程，在前述製程b)中，使成形材料的溫度比自然冷卻更緩慢地降低。 A third invention of the present application is a pretreatment method of a molding material supplied to a molding machine, characterized by comprising: a) a process of drying by heating a molding material; and b) after the aforementioned process a), a process for lowering the temperature of the molding material in a container filled with an inert gas; and c) a process of supplying a molding material to the molding machine after the process b), and a temperature ratio of the molding material in the process b) Natural cooling is reduced more slowly.
本申請案的第4發明係第2發明或第3發明的成形材料的預處理方法，其中，在前述製程b)中，隨著時間的經過，成形材料的每單位時間的溫度降低幅度增大。 According to a fourth aspect of the invention, there is provided a method of pretreating a molding material according to the second aspect or the third aspect of the invention, wherein, in the process b), the temperature decrease per unit time of the molding material increases as time passes. .
本申請案的第5發明係第2發明或第3發明的成形材料的預處理方法，其中，在前述製程b)中，使成形材料的溫度逐步降低。 According to a fifth aspect of the invention, in the method of pretreating a molding material according to the second aspect or the third aspect of the invention, the temperature of the molding material is gradually lowered in the process (b).
本申請案的第6發明係第1發明至第5發明中任一發明的成形材料的預處理方法，其中，在前述製程b)中，使成形材料的溫度降低至60℃以下。 According to a sixth aspect of the invention, in the method of pretreating a molding material according to any one of the first to fifth aspects of the invention, in the process b), the temperature of the molding material is lowered to 60 ° C or lower.
本申請案的第7發明係第1發明至第6發明中任一發明的成形材料的預處理方法，其中，前述製程b)中的前 述容器內之壓力比前述容器外的環境壓力高。 According to a seventh aspect of the invention, the method for pretreating a molding material according to any one of the first to sixth aspects of the invention, wherein The pressure in the container is higher than the ambient pressure outside the container.
本申請案的第8發明係第7發明的成形材料的預處理方法，其中，前述製程b)中的前述容器內之壓力比前述成形機中的成形材料的射出壓力低。 According to a seventh aspect of the invention, in the method of pretreating a molding material according to the seventh aspect of the invention, the pressure in the container in the process b) is lower than the pressure of the molding material in the molding machine.
本申請案的第9發明係第8發明的成形材料的預處理方法，其中，前述製程b)中的前述容器內之壓力小於1MPa。 A ninth invention of the present invention is the method for pretreating a molding material according to the eighth aspect of the invention, wherein the pressure in the container in the process b) is less than 1 MPa.
本申請案的第10發明係第1發明至第9發明中任一發明的成形材料的預處理方法，其中，在前述製程b)之後，且在前述製程c)之前，還具有將成形材料的溫度維持恆定的製程。 According to a tenth aspect of the invention, the method for pretreating a molding material according to any one of the first to the ninth invention, further comprising the molding material after the process b) and before the process c) The temperature is maintained at a constant process.
本申請案的第11發明係第1發明至第10發明中任一發明的成形材料的預處理方法，其中，還具有d)測量前述成形機的供給口附近的溫度，並依據所測量之溫度來控制前述成形機內的射出噴嘴前方的成形材料的溫度的製程。 The eleventh invention of the present invention is the method for pretreating a molding material according to any one of the first invention to the tenth invention, further comprising d) measuring a temperature in the vicinity of a supply port of the molding machine, and depending on the measured temperature A process for controlling the temperature of the molding material in front of the injection nozzle in the molding machine.
本申請案的第12發明係第1發明至第11發明中任一發明的成形材料的預處理方法，其中，將光學組件用成形材料作為處理對象。 According to a twelfth aspect of the invention, in the method of pretreating a molding material according to any one of the first to eleventh aspects of the invention, the molding material for an optical component is to be treated.
本申請案的第13發明係被供給到成形機的成形材料的預處理裝置，其特徵為具備：冷卻容器，將藉由加熱而被乾燥的成形材料收容於內部；氣體供給部，將惰性氣體填充於前述冷卻容器的內部；及冷卻機構，使收容於前述冷卻容器內之成形材料的溫度降低，藉由從前述氣體供給 部供給惰性氣體，將前述冷卻容器內之壓力維持大致恆定，並且，前述冷卻機構使成形材料的溫度降低。 A thirteenth aspect of the present invention is a pretreatment apparatus for a molding material supplied to a molding machine, comprising: a cooling container that accommodates a molding material that is dried by heating; and a gas supply unit that supplies an inert gas Filling the inside of the cooling container; and a cooling mechanism for lowering the temperature of the molding material contained in the cooling container by supplying the gas from the gas The inert gas is supplied to maintain the pressure in the cooling container substantially constant, and the cooling mechanism lowers the temperature of the molding material.
本申請案的第14發明係第13發明的成形材料的預處理裝置，其中，前述冷卻機構使成形材料的溫度比自然冷卻更緩慢地降低。 A fourteenth aspect of the invention is the pretreatment apparatus for a molding material according to the thirteenth aspect of the invention, wherein the cooling means lowers the temperature of the molding material more slowly than natural cooling.
本申請案的第15發明係被供給到成形機的成形材料的預處理裝置，其特徵為具備：冷卻容器，將藉由加熱而被乾燥的成形材料積存於內部；氣體供給部，將惰性氣體填充於前述冷卻容器的內部；及冷卻機構，使積存於前述冷卻容器內之成形材料的溫度降低，前述冷卻機構使成形材料的溫度比自然冷卻更緩慢地降低。 According to a fifteenth aspect of the invention, there is provided a pretreatment apparatus for a molding material supplied to a molding machine, comprising: a cooling container that stores a molding material dried by heating; and a gas supply unit that supplies an inert gas Filled in the inside of the cooling container; and a cooling mechanism that lowers the temperature of the molding material stored in the cooling container, and the cooling mechanism lowers the temperature of the molding material more slowly than natural cooling.
本申請案的第16發明係第13發明至第15發明中任一發明的成形材料的預處理裝置，其中，還具備：加熱容器，在比前述冷卻容器更靠近搬送路徑的上游側，將成形材料積存於內部；加熱乾燥機構，藉由加熱積存於前述加熱容器內之成形材料而使其乾燥；及搬送管，從前述加熱容器向前述冷卻容器搬送成形材料。 A pretreatment apparatus for a molding material according to any one of the thirteenth invention of the present invention, further comprising: a heating container, which is formed on an upstream side of the transport path from the cooling container The material is stored inside, the heating and drying mechanism dries the molding material stored in the heating container, and the transfer tube transfers the molding material from the heating container to the cooling container.
本申請案的第17發明係第13發明至第16發明中任一發明的成形材料的預處理裝置，其中，還具有排出口，該排出口位於前述冷卻容器或位於前述冷卻容器的下游側的其他容器與前述成形機之間，並與外部連通，前述冷卻容器或位於前述冷卻容器的下游側的前述其他容器內之壓力比外部的環境壓力高。 A pretreatment apparatus for a molding material according to any one of the thirteenth to sixteenth aspects of the present invention, further comprising a discharge port located in the cooling container or on a downstream side of the cooling container The other container communicates with the outside of the forming machine, and the pressure in the cooling container or the other container located on the downstream side of the cooling container is higher than the external environmental pressure.
本申請案的第18發明係第13發明至第17發明中任 一發明的成形材料的預處理裝置，其中，還具有調溫機構，該調溫機構將由前述冷卻機構冷卻後的成形材料的溫度維持恆定。 The eighteenth invention of the present application is the thirteenth to the seventeenth invention An apparatus for pretreating a molding material according to the invention further includes a temperature adjustment mechanism that maintains a temperature of the molding material cooled by the cooling mechanism constant.
本申請案的第19發明係第13發明至第18發明中任一發明的成形材料的預處理裝置，其中，將光學組件用成形材料作為處理對象。 A pretreatment apparatus for a molding material according to any one of the thirteenth invention, wherein the molding material for an optical component is to be treated.
本申請案的第20發明係一種在使成形材料熔融之後，將其射出到模具內的射出成形機，其特徵為具有：缸體；供給口，對前述缸體供給經過預處理的成形材料；加熱器，在前述缸體內使成形材料熔融；射出噴嘴，從前述缸體射出熔融之成形材料；及螺桿，在前述缸體內，向前述射出噴嘴側搬送成形材料，在收容有藉由加熱而乾燥的成形材料的容器內，藉由惰性氣體的供給而將前述容器內之壓力維持大致恆定，且使溫度降低的成形材料被供給到前述供給口。 According to a twentieth aspect of the present invention, in an injection molding machine for melting a molding material and ejecting the molding material into a mold, the invention further comprises: a cylinder; a supply port for supplying the pre-formed molding material to the cylinder; The heater melts the molding material in the cylinder; the injection nozzle ejects the molten molding material from the cylinder; and the screw conveys the molding material to the injection nozzle side in the cylinder, and dries it by heating. In the container of the molding material, the pressure in the container is maintained substantially constant by the supply of the inert gas, and the molding material having a lowered temperature is supplied to the supply port.
本申請案的第21發明係第20發明的射出成形機，其中，在前述容器內使溫度比自然冷卻更緩慢地降低的成形材料被供給到前述供給口。 According to a twenty-first aspect of the present invention, in the injection molding machine of the twentieth aspect, the molding material which is lowered in temperature in the container more slowly than the natural cooling is supplied to the supply port.
本申請案的第22發明係一種在使成形材料熔融之後，將其射出到模具內的射出成形機，其特徵為具有：缸體；供給口，對前述缸體供給經過預處理的成形材料；加熱器，在前述缸體內使成形材料熔融；射出噴嘴，從前述缸體射出熔融之成形材料；及螺桿，在前述缸體內，向前述射出噴嘴側搬送成形材料，在收容有藉由加熱而乾燥的 成形材料且填充有惰性氣體之容器內，使溫度比自然冷卻更緩慢地降低的成形材料被供給到前述供給口。 The twenty-second invention of the present application is an injection molding machine that melts a molding material and then ejects it into a mold, and has a cylinder, a supply port, and a pre-treated molding material to the cylinder; The heater melts the molding material in the cylinder; the injection nozzle ejects the molten molding material from the cylinder; and the screw conveys the molding material to the injection nozzle side in the cylinder, and dries it by heating. of A molding material in which a material is filled and an inert gas is filled, and a molding material whose temperature is lowered more slowly than natural cooling is supplied to the aforementioned supply port.
本申請案的第23發明係第20發明至第22發明中任一發明的射出成形機，其中，在前述容器內降低溫度之後維持恆定的溫度的成形材料被供給到前述供給口。 The injection molding machine according to any one of the 20th to 22nd invention, wherein the molding material which maintains a constant temperature after the temperature is lowered in the container is supplied to the supply port.
本申請案的第24發明係第20發明至第23發明中任一發明的射出成形機，其中，依據前述供給口附近的溫度，控制前述缸體內的前述射出噴嘴前方的成形材料的溫度。 The injection molding machine according to any one of the 20th to 23rd invention, wherein the temperature of the molding material in front of the injection nozzle in the cylinder is controlled in accordance with a temperature in the vicinity of the supply port.
本申請案的第25發明係在使成形材料熔融之後，將其射出到模具內的射出成形方法，其特徵為具有：x)經由供給口，對缸體供給經過預處理的成形材料的製程；y)在前述缸體內使成形材料熔融的製程；及z)從前述缸體的射出噴嘴射出被熔融之成形材料的製程，在前述製程x)中，在收容有藉由加熱而乾燥的成形材料的容器內，藉由惰性氣體的供給將前述容器內之壓力維持大致恆定，並且，將降低溫度的成形材料經由前述供給口供給到前述缸體。 A twenty-fifth invention of the present application is an injection molding method for ejecting a molding material and then ejecting it into a mold, characterized in that: x) a process of supplying a pretreated molding material to a cylinder via a supply port; y) a process of melting the molding material in the cylinder; and z) a process of ejecting the molten molding material from the injection nozzle of the cylinder, and in the process x), a molding material dried by heating is accommodated In the container, the pressure in the container is maintained substantially constant by the supply of the inert gas, and the temperature-reduced molding material is supplied to the cylinder through the supply port.
本申請案的第26發明係第25發明的射出成形方法，其中，在前述製程x)中，在前述容器內，經由前述供給口，向前述缸體供給使溫度比自然冷卻更緩慢地降低的成形材料。 According to a twenty-second aspect of the present invention, in the injection molding method of the present invention, in the process (x), the supply of the cylinder to the cylinder through the supply port causes the temperature to decrease more slowly than the natural cooling. Forming material.
本申請案的第27發明係使成形材料熔融之後將其射出到模具內的射出成形方法，其特徵為具有：x)經由供 給口，對缸體供給經過預處理的成形材料的製程；y)在前述缸體內使成形材料熔融的製程；及z)從前述缸體的射出噴嘴射出被熔融之成形材料的製程，在前述製程x)中，在收容有藉由加熱而乾燥的成形材料且填充有惰性氣體之容器內，經由前述供給口，向前述缸體供給使溫度比自然冷卻更緩慢地降低的成形材料。 The twenty-seventh invention of the present application is an injection molding method for melting a molding material and then ejecting it into a mold, which is characterized by having: x) a process of supplying a pretreated shaped material to the cylinder; y) a process of melting the molding material in the cylinder; and z) a process of ejecting the molten molding material from the injection nozzle of the cylinder, In the process x), in the container in which the molding material dried by heating is stored and filled with the inert gas, the molding material is supplied to the cylinder through the supply port to lower the temperature more slowly than the natural cooling.
本申請案的第28發明係第25發明至第27發明中任一發明的射出成形方法，其中，在前述製程x)中，經由前述供給口，向前述缸體供給在前述容器內降低溫度之後維持恆定溫度的成形材料。 The injection molding method according to any one of the twenty-fifth to twenty-seventh aspects of the present invention, wherein, in the process (x), after the temperature is lowered in the container through the supply port A forming material that maintains a constant temperature.
本申請案的第29發明係第25發明至第28發明中任一發明的射出成形方法，其中，在前述製程y)中，依據前述供給口附近的溫度，控制前述缸體內的前述射出噴嘴前方的成形材料的溫度。 The injection molding method according to any one of the twenty-fifth to twenty-eighthth aspects of the present invention, wherein in the process (y), the front of the injection nozzle in the cylinder is controlled in accordance with a temperature in the vicinity of the supply port The temperature of the forming material.
依本申請案的第1發明~第29發明，能夠增加成形材料中的惰性氣體的含量。其結果，能夠抑制成形時成形材料的氧化。 According to the first to the ninth inventions of the present application, the content of the inert gas in the molding material can be increased. As a result, oxidation of the molding material at the time of molding can be suppressed.
尤其，依本申請案的第4發明及第5發明，在製程b)中，能夠延長高溫期間。由此，能夠使成形材料中含有足夠的惰性氣體，同時能夠使成形材料的溫度降低。 In particular, according to the fourth invention and the fifth invention of the present application, in the process b), the high temperature period can be extended. Thereby, sufficient inert gas can be contained in the molding material, and the temperature of the molding material can be lowered.
尤其，依本申請案的第6發明及第7發明，能夠進一步增加成形材料中的惰性氣體的含量。 In particular, according to the sixth invention and the seventh invention of the present application, the content of the inert gas in the molding material can be further increased.
尤其，依本申請案的第10發明、第18發明、第23發明及第28發明，能夠使被供給到成形機的成形材料的溫度更穩定。其結果，能夠穩定地使樹脂產品成形。 In particular, according to the tenth invention, the eighteenth invention, the twenty-third invention, and the twenty-eighthth invention of the present application, the temperature of the molding material supplied to the molding machine can be made more stable. As a result, the resin product can be stably molded.
尤其，依本申請案的第11發明、第24發明及第29發明，能夠調整成形材料在射出噴嘴前方熔融之位置。由此，例如使成形材料在射出噴嘴的正前方熔融，從而能夠縮短高溫期間。其結果，能夠進一步抑制成形材料的氧化。 In particular, according to the eleventh invention, the twenty-fourth invention, and the twenty-ninth invention of the present application, it is possible to adjust the position at which the molding material is melted in front of the injection nozzle. Thereby, for example, the molding material is melted in front of the injection nozzle, and the high temperature period can be shortened. As a result, oxidation of the molding material can be further suppressed.
尤其，依本申請案的第17發明，能夠抑制氣體從成形機逆流到冷卻容器或位於冷卻容器的下游側的其他容器內。由此，能夠抑制在供給到成形機之前成形材料的溫度上升。 In particular, according to the seventeenth invention of the present application, it is possible to suppress the gas from flowing back from the molding machine to the cooling container or other container located on the downstream side of the cooling container. Thereby, it is possible to suppress an increase in the temperature of the molding material before being supplied to the molding machine.
1‧‧‧預處理裝置 1‧‧‧Pretreatment device
2‧‧‧射出成形機 2‧‧‧ Injection molding machine
10‧‧‧前頭料斗 10‧‧‧Front hopper
20‧‧‧加熱料斗 20‧‧‧heating hopper
24‧‧‧第1搬送料斗 24‧‧‧1st transport hopper
30‧‧‧加熱乾燥機構 30‧‧‧heating and drying mechanism
31‧‧‧氣體加熱管 31‧‧‧ gas heating tube
32‧‧‧送風機 32‧‧‧Air blower
33‧‧‧熱交換器 33‧‧‧ heat exchanger
40‧‧‧冷卻料斗 40‧‧‧cooling hopper
44‧‧‧第2搬送料斗 44‧‧‧2nd transport hopper
50‧‧‧冷卻機構 50‧‧‧Cooling mechanism
51‧‧‧氣體冷卻管 51‧‧‧ gas cooling tube
52‧‧‧送風機 52‧‧‧Air blower
53‧‧‧熱交換器 53‧‧‧ heat exchanger
60‧‧‧機載料斗 60‧‧‧Airborne hopper
61‧‧‧供給管 61‧‧‧Supply tube
62‧‧‧開閉閥 62‧‧‧Opening and closing valve
63‧‧‧排出口 63‧‧‧Export
64‧‧‧溫度感測器 64‧‧‧Temperature Sensor
65‧‧‧帶式加熱器 65‧‧‧Band heater
70‧‧‧控制部 70‧‧‧Control Department
81‧‧‧第1搬送管 81‧‧‧1st transport tube
82‧‧‧第2搬送管 82‧‧‧2nd transport tube
83‧‧‧第3搬送管 83‧‧‧3rd transport tube
84‧‧‧第1吸入管 84‧‧‧1st suction pipe
85‧‧‧第2吸入管 85‧‧‧2nd suction pipe
86‧‧‧第3吸入管 86‧‧‧3rd suction tube
87‧‧‧合流管 87‧‧‧Confluence tube
88‧‧‧送風機 88‧‧‧Air blower
89‧‧‧氮氣供給部 89‧‧‧Nitrogen Supply Department
100‧‧‧樹脂產品製造系統 100‧‧‧Resin product manufacturing system
210‧‧‧射出裝置 210‧‧‧Injection device
211‧‧‧缸體 211‧‧‧Cylinder
212‧‧‧螺桿 212‧‧‧ screw
213‧‧‧供給口 213‧‧‧ supply port
214‧‧‧射出噴嘴 214‧‧‧Injection nozzle
215‧‧‧加熱器 215‧‧‧heater
216、217、225、226、227‧‧‧馬達 216, 217, 225, 226, 227‧‧ motor
220‧‧‧合模裝置 220‧‧‧Molding device
230‧‧‧控制部 230‧‧‧Control Department
290‧‧‧模具裝置 290‧‧‧Molding device
291‧‧‧固定模 291‧‧‧Fixed mode
292‧‧‧可動模 292‧‧‧ movable mold
293‧‧‧模穴空間 293‧‧‧ cavity space
第1圖係表示預處理裝置及射出成形機的結構之圖。 Fig. 1 is a view showing the configuration of a pretreatment apparatus and an injection molding machine.
第2圖係表示射出成形機的結構之圖。 Fig. 2 is a view showing the structure of an injection molding machine.
第3圖係表示預處理裝置及射出成形機的控制系統的結構之方塊圖。 Fig. 3 is a block diagram showing the configuration of a control system of a pretreatment apparatus and an injection molding machine.
第4圖係表示預處理的一例之流程圖。 Fig. 4 is a flow chart showing an example of preprocessing.
第5圖係表示冷卻料斗內的樹脂顆粒的溫度變化的例子之曲線圖。 Fig. 5 is a graph showing an example of temperature change of resin particles in the cooling hopper.
第6圖係表示冷卻料斗內的樹脂顆粒的溫度變化的例子之曲線圖。 Fig. 6 is a graph showing an example of temperature change of resin particles in the cooling hopper.
第7圖係表示冷卻料斗內的樹脂顆粒的溫度變化的例 子之曲線圖。 Fig. 7 is a view showing an example of temperature change of resin particles in the cooling hopper. The graph of the child.
第8圖係表示冷卻料斗內的樹脂顆粒的溫度變化的例子之曲線圖。 Fig. 8 is a graph showing an example of temperature change of resin particles in the cooling hopper.
第9圖係變形例之機載料斗附近的結構之圖。 Fig. 9 is a view showing the structure in the vicinity of the airborne hopper of the modification.
第10圖係表示變形例之預處理裝置及射出成形機的結構之圖。 Fig. 10 is a view showing the configuration of a pretreatment apparatus and an injection molding machine according to a modification.
以下，參閱附圖，對本發明的較佳實施形態進行說明。 Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
第1圖係表示本發明的一實施形態之預處理裝置1及射出成形機2的結構之圖。預處理裝置1對由粉體或粒體構成的成形材料即樹脂顆粒進行乾燥等預處理，並將處理後的樹脂顆粒供給到射出成形機2。射出成形機2使從預處理裝置1被供給的樹脂顆粒熔融之後將其射出到模具209，並藉由使樹脂在模具209內固化而使樹脂產品成形。另外，在第1圖中，簡化描繪出射出成形機2的結構。預處理裝置1及射出成形機2如第1圖所示被連接，從而構成單一的樹脂產品製造系統100。 Fig. 1 is a view showing the configuration of a pretreatment apparatus 1 and an injection molding machine 2 according to an embodiment of the present invention. The pretreatment apparatus 1 pretreats resin particles, which are molding materials composed of powder or granules, and the like, and supplies the processed resin pellets to the injection molding machine 2. The injection molding machine 2 melts the resin pellets supplied from the pretreatment apparatus 1 and then ejects them to the mold 209, and forms the resin product by curing the resin in the mold 209. In addition, in the first figure, the structure of the injection molding machine 2 is simplified. The pretreatment apparatus 1 and the injection molding machine 2 are connected as shown in Fig. 1 to constitute a single resin product manufacturing system 100.
本實施形態的預處理裝置1將光學組件用樹脂顆粒作為處理對象。從預處理裝置1供給的樹脂顆粒藉由在射出成形機2中成形而成為導光板等透明的光學組件。在透明 的光學組件的成形中，防止因氧化而變色成為尤其重要的品質管理項目。然而，在本發明中成為處理對象的樹脂顆粒未必限定於光學組件用樹脂顆粒。 In the pretreatment apparatus 1 of the present embodiment, the resin particles for optical components are treated. The resin pellets supplied from the pretreatment apparatus 1 are formed into a transparent optical component such as a light guide plate by being molded in the injection molding machine 2. In transparent In the formation of optical components, it is a particularly important quality management item to prevent discoloration due to oxidation. However, the resin particles to be treated in the present invention are not necessarily limited to the resin particles for optical components.
如第1圖所示，本實施形態的預處理裝置1具備前頭料斗10、加熱料斗20、加熱乾燥機構30、冷卻料斗40、冷卻機構50、機載料斗60及控制部70。 As shown in Fig. 1, the pretreatment apparatus 1 of the present embodiment includes a front hopper 10, a heating hopper 20, a heating and drying mechanism 30, a cooling hopper 40, a cooling mechanism 50, an on-board hopper 60, and a control unit 70.
前頭料斗10係將乾燥前的樹脂顆粒積存於內部的容器。前頭料斗10具有：在上部具有開口13的有底圓筒狀的料斗主體11；及載置於料斗主體11的上部的蓋部12。在料斗主體11的內部設置有用於積存樹脂顆粒的空間。蓋部12封閉料斗主體11的上部的開口13。並且，若取下蓋部12，則料斗主體11的上部開啟，能夠經由開口13將樹脂顆粒投入到料斗主體11的內部。 The front hopper 10 is a container in which resin particles before drying are stored in the inside. The front hopper 10 has a bottomed cylindrical hopper main body 11 having an opening 13 at an upper portion thereof, and a lid portion 12 placed on an upper portion of the hopper main body 11. A space for accumulating resin particles is provided inside the hopper main body 11. The lid portion 12 closes the opening 13 of the upper portion of the hopper body 11. When the lid portion 12 is removed, the upper portion of the hopper main body 11 is opened, and the resin particles can be introduced into the inside of the hopper main body 11 through the opening 13.
加熱料斗20為在比前頭料斗10更靠近搬送路徑的下游側，且比冷卻料斗40更靠近搬送路徑的上游側，將樹脂顆粒積存於內部的容器(加熱容器)。如第1圖所示，加熱料斗20具有大致圓筒狀的側壁21、從側壁21的下端部朝向下方逐漸收縮的漏斗狀的底部22、及覆蓋加熱料斗20的上部的頂板部23。在加熱料斗20的內部設置有用於積存樹脂顆粒並使其加熱乾燥的空間。 The heating hopper 20 is a container (heating container) in which resin pellets are stored on the downstream side of the transport path of the front hopper 10 and closer to the upstream side of the transport path than the cooling hopper 40. As shown in Fig. 1, the heating hopper 20 has a substantially cylindrical side wall 21, a funnel-shaped bottom portion 22 that gradually contracts downward from the lower end portion of the side wall 21, and a top plate portion 23 that covers the upper portion of the heating hopper 20. A space for accumulating resin particles and heating and drying the inside of the heating hopper 20 is provided.
在加熱料斗20的上部設置有比加熱料斗20小的第1搬送料斗24。第1搬送料斗24係在向加熱料斗20供給樹脂顆粒時暫時收容樹脂顆粒的容器。前頭料斗10和第1搬送料斗24經由第1搬送管81彼此連接。並且，在第 1搬送料斗24的下端部設置有可開閉的投入口241。若開啟投入口241，則積存在第1搬送料斗24中的樹脂顆粒被投入到加熱料斗20的內部。 A first conveying hopper 24 that is smaller than the heating hopper 20 is provided in the upper portion of the heating hopper 20. The first transfer hopper 24 is a container that temporarily accommodates resin pellets when resin pellets are supplied to the heating hopper 20 . The front hopper 10 and the first transfer hopper 24 are connected to each other via the first transfer pipe 81. And, in the first The lower end portion of the transfer hopper 24 is provided with an input port 241 that can be opened and closed. When the input port 241 is opened, the resin particles accumulated in the first transfer hopper 24 are put into the inside of the heating hopper 20.
加熱乾燥機構30係用於藉由加熱積存在加熱料斗20內的樹脂顆粒而使其乾燥的機構。加熱乾燥機構30具有加熱氣體且使其循環的氣體加熱管31。氣體加熱管31的一端部連接於設置在加熱料斗20的側壁21上的吸引口25。氣體加熱管31的另一端部連接於配置在加熱料斗20的內部的吹出口26。並且，在氣體加熱管31的路徑中途設置有送風機32和熱交換器33。 The heating and drying mechanism 30 is a mechanism for drying the resin particles accumulated in the heating hopper 20 by heating. The heating and drying mechanism 30 has a gas heating pipe 31 that heats and circulates the gas. One end of the gas heating pipe 31 is connected to a suction port 25 provided on the side wall 21 of the heating hopper 20. The other end of the gas heating pipe 31 is connected to an air outlet 26 disposed inside the heating hopper 20. Further, a blower 32 and a heat exchanger 33 are provided in the middle of the path of the gas heating pipe 31.
若使送風機32動作，則如第1圖中用箭頭A1所表示，在氣體加熱管31中產生從吸引口25朝向吹出口26的氣流。從加熱料斗20被吸入到氣體加熱管31的氣體在熱交換器33中被加熱而成為熱風。然後，該熱風從吹出口26向加熱料斗20的內部被吹出。另外，在氣體加熱管31的路徑中途還可以設置有吸附包含在氣體中的水份的吸附器。 When the blower 32 is operated, as shown by an arrow A1 in Fig. 1, an air flow from the suction port 25 toward the air outlet 26 is generated in the gas heating pipe 31. The gas sucked into the gas heating pipe 31 from the heating hopper 20 is heated in the heat exchanger 33 to become hot air. Then, the hot air is blown from the air outlet 26 to the inside of the heating hopper 20. Further, an adsorber that adsorbs moisture contained in the gas may be provided in the middle of the path of the gas heating pipe 31.
從吹出口26吹出的熱風通過積存於加熱料斗20內部的樹脂顆粒的間隙之後，在加熱料斗20內擴散。由此，樹脂顆粒被加熱，水份從樹脂顆粒蒸發，樹脂顆粒乾燥。亦即，在加熱料斗20內擴散的氣體從樹脂顆粒吸收水份。並且，吸濕的氣體從加熱料斗20通過吸引口25之後，再次被吸入到氣體加熱管31。 The hot air blown out from the air outlet 26 passes through the gap of the resin particles accumulated in the inside of the heating hopper 20, and then diffuses in the heating hopper 20. Thereby, the resin particles are heated, water is evaporated from the resin particles, and the resin particles are dried. That is, the gas diffused in the heating hopper 20 absorbs moisture from the resin particles. Then, the moisture-absorbing gas passes through the suction port 25 from the heating hopper 20, and is again sucked into the gas heating pipe 31.
冷卻料斗40係在比加熱料斗20更靠近搬送路徑的下 游側，且比機載料斗60更靠近搬送路徑的上游側，將樹脂顆粒積存於內部的容器(冷卻容器)。如第1圖所示，冷卻料斗40具有大致圓筒狀的側壁41、從側壁41的下端部朝向下方逐漸收縮的漏斗狀的底部42、及覆蓋冷卻料斗40的上部的頂板部43。在冷卻料斗40的內部設置有用於積存樹脂顆粒並使其溫度降低的空間。 The cooling hopper 40 is placed closer to the transport path than the heating hopper 20 The resin side is placed closer to the upstream side of the transport path than the airborne hopper 60, and resin pellets are stored in the internal container (cooling container). As shown in Fig. 1, the cooling hopper 40 has a substantially cylindrical side wall 41, a funnel-shaped bottom portion 42 that gradually contracts downward from the lower end portion of the side wall 41, and a top plate portion 43 that covers the upper portion of the cooling hopper 40. A space for accumulating resin particles and lowering the temperature thereof is provided inside the cooling hopper 40.
在冷卻料斗40的上部設置有比冷卻料斗40小的第2搬送料斗44。第2搬送料斗44係在向冷卻料斗40供給樹脂顆粒時暫時收容樹脂顆粒的容器。加熱料斗20和第2搬送料斗44經由第2搬送管82彼此連接。並且，在第2搬送料斗44的下端部設置有可開閉的投入口441。若投入口441開啟，則積存在第2搬送料斗44中的樹脂顆粒被投入到冷卻料斗40的內部。 A second transfer hopper 44 that is smaller than the cooling hopper 40 is provided in the upper portion of the cooling hopper 40. The second transfer hopper 44 is a container that temporarily accommodates resin pellets when resin pellets are supplied to the cooling hopper 40 . The heating hopper 20 and the second transfer hopper 44 are connected to each other via the second transfer pipe 82. Further, an opening port 441 that can be opened and closed is provided at a lower end portion of the second transfer hopper 44. When the input port 441 is opened, the resin particles accumulated in the second transfer hopper 44 are put into the inside of the cooling hopper 40.
冷卻機構50係用於降低積存在冷卻料斗40內的樹脂顆粒的溫度的機構。冷卻機構50具有冷卻氣體且使其循環的氣體冷卻管51。氣體冷卻管51的一端部連接於設置在冷卻料斗40的側壁41上的吸引口45。氣體冷卻管51的另一端部連接於設置在冷卻料斗40的內部的吹出口46。並且，在氣體冷卻管51的路徑中途設置有送風機52和熱交換器53。 The cooling mechanism 50 is a mechanism for reducing the temperature of the resin particles accumulated in the cooling hopper 40. The cooling mechanism 50 has a gas cooling pipe 51 that cools the gas and circulates it. One end of the gas cooling pipe 51 is connected to a suction port 45 provided on the side wall 41 of the cooling hopper 40. The other end of the gas cooling pipe 51 is connected to an air outlet 46 provided inside the cooling hopper 40. Further, a blower 52 and a heat exchanger 53 are provided in the middle of the path of the gas cooling pipe 51.
若使送風機52動作，則如第1圖中用箭頭A2所表示，在氣體冷卻管51中產生從吸引口45朝向吹出口46的氣流。從冷卻料斗40被吸入到氣體冷卻管51的氣體通過熱交換器53，從而被熱交換器53的冷媒帶走熱量。由 此，氣體的溫度降低。然後，低溫化的氣體從吹出口46向冷卻料斗40的內部吹出。 When the blower 52 is operated, as shown by an arrow A2 in Fig. 1, an air flow from the suction port 45 toward the air outlet 46 is generated in the gas cooling pipe 51. The gas sucked into the gas cooling pipe 51 from the cooling hopper 40 passes through the heat exchanger 53, so that the heat of the heat exchanger 53 carries away heat. by Thus, the temperature of the gas is lowered. Then, the temperature-reduced gas is blown from the air outlet 46 to the inside of the cooling hopper 40.
從吹出口46吹出的氣體通過積存在冷卻料斗40內部的樹脂顆粒的間隙之後，在冷卻料斗40內擴散。由此，樹脂顆粒的溫度降低。並且，藉由與樹脂顆粒的接觸而溫度上升的氣體，從冷卻料斗40通過吸引口45之後，再次被吸入到氣體冷卻管51。 The gas blown out from the air outlet 46 passes through the gap of the resin particles accumulated in the inside of the cooling hopper 40, and then diffuses in the cooling hopper 40. Thereby, the temperature of the resin particles is lowered. Then, the gas whose temperature rises by the contact with the resin particles passes through the suction port 45 from the cooling hopper 40, and is again sucked into the gas cooling pipe 51.
另外，熱交換器53的冷媒的溫度依據來自控制部70的指令能夠設定為任意的溫度。若調節冷媒的溫度，則能夠調節基於冷卻機構50進行的樹脂顆粒的冷卻速度。 Further, the temperature of the refrigerant of the heat exchanger 53 can be set to an arbitrary temperature in accordance with an instruction from the control unit 70. When the temperature of the refrigerant is adjusted, the cooling rate of the resin pellets by the cooling mechanism 50 can be adjusted.
機載料斗60位於比冷卻料斗40更靠近搬送路徑的下游側，且位於射出成形機2的上部。在機載料斗60的內部設置有用於積存冷卻後的樹脂顆粒的空間。冷卻料斗40和機載料斗60經由第3搬送管83彼此連接。並且，機載料斗60和射出成形機2經由供給管61彼此連接。在供給管61上設置有開閉閥62。若開啟開閉閥62，則積存在機載料斗60的內部的樹脂顆粒在通過供給管61之後，被供給到射出成形機2的缸體211。 The airborne hopper 60 is located closer to the downstream side of the transport path than the cooling hopper 40, and is located at the upper portion of the injection molding machine 2. A space for storing the cooled resin particles is provided inside the airborne hopper 60. The cooling hopper 40 and the on-board hopper 60 are connected to each other via the third transfer pipe 83. Further, the airborne hopper 60 and the injection molding machine 2 are connected to each other via a supply pipe 61. An opening and closing valve 62 is provided in the supply pipe 61. When the opening and closing valve 62 is opened, the resin particles accumulated in the inside of the airborne hopper 60 are supplied to the cylinder 211 of the injection molding machine 2 after passing through the supply pipe 61.
並且，在供給管61上設置有排出口63和溫度感測器64。排出口63經由止回閥631而與供給管61的外部連通。止回閥631僅容許氣體從供給管61的內部向外部通過。從而，若供給管61的內部壓力變得比外部壓力高，則氣體從供給管61的內部向外部排出。並且，溫度感測器64在射出成形機2的供給口附近測量供給管61內的氣 體的溫度。溫度感測器64的測量結果被發送到控制部70。 Further, a discharge port 63 and a temperature sensor 64 are provided on the supply pipe 61. The discharge port 63 communicates with the outside of the supply pipe 61 via the check valve 631. The check valve 631 allows only gas to pass from the inside to the outside of the supply pipe 61. Therefore, when the internal pressure of the supply pipe 61 becomes higher than the external pressure, the gas is discharged to the outside from the inside of the supply pipe 61. Further, the temperature sensor 64 measures the gas in the supply pipe 61 near the supply port of the injection molding machine 2. Body temperature. The measurement result of the temperature sensor 64 is sent to the control unit 70.
在第1搬送料斗24、第2搬送料斗44及機載料斗60的上部，分別連接有第1吸入管84、第2吸入管85及第3吸入管86。並且，第1吸入管84、第2吸入管85及第3吸入管86的另一端連接於1根合流管87。另外，合流管87的另一端連接於第1搬送管81。並且，在合流管87的路徑中途設置有送風機88。 The first suction pipe 84, the second suction pipe 85, and the third suction pipe 86 are connected to the upper portions of the first conveying hopper 24, the second conveying hopper 44, and the airborne hopper 60, respectively. Further, the other ends of the first suction pipe 84, the second suction pipe 85, and the third suction pipe 86 are connected to one merging pipe 87. Further, the other end of the merging pipe 87 is connected to the first transfer pipe 81. Further, a blower 88 is provided in the middle of the path of the merging pipe 87.
若使送風機88動作，則如第1圖中用箭頭A3所表示，在第1吸入管84、第2吸入管85、第3吸入管86及合流管87的內部，產生從第1搬送料斗24、第2搬送料斗44及機載料斗60通過送風機88之後朝向第1搬送管81的氣流。如此一來，如第1圖中用箭頭A4、A5、A6所表示，產生從前頭料斗10通過第1搬送管81之後朝向第1搬送料斗24的氣流，產生從加熱料斗20通過第2搬送管82之後朝向第2搬送料斗44的氣流，以及產生從冷卻料斗40通過第3搬送管83之後朝向機載料斗60的氣流。藉由這些氣流，樹脂顆粒被氣動搬送。 When the blower 88 is operated, as shown by the arrow A3 in the first drawing, the first transfer hopper 24 is generated inside the first suction pipe 84, the second suction pipe 85, the third suction pipe 86, and the merging pipe 87. The second transfer hopper 44 and the airborne hopper 60 pass through the air blower 88 and then flow toward the first transfer pipe 81. In this way, as shown by the arrows A4, A5, and A6 in the first drawing, the airflow from the front hopper 10 through the first transfer pipe 81 to the first transfer hopper 24 is generated, and the second hopper is passed from the heating hopper 20 to the second transfer pipe. After 82, the airflow toward the second transfer hopper 44 and the airflow toward the airborne hopper 60 after passing through the third transfer pipe 83 from the cooling hopper 40 occur. With these air flows, the resin particles are pneumatically conveyed.
另外，在第1搬送料斗24和第1吸入管84的連接部、第2搬送料斗44和第2吸引管85的連接部、以及機載料斗60和第3吸入管86的連接部，分別設置有穿孔金屬板(省略圖示)。在穿孔金屬板上設置有複數個比各樹脂顆粒小的貫穿孔。由此，容許氣體的通過，且防止樹脂顆粒流入各吸入管84、85、86。 In addition, the connection portion between the first transfer hopper 24 and the first suction pipe 84, the connection portion between the second transfer hopper 44 and the second suction pipe 85, and the connection portion between the airborne hopper 60 and the third suction pipe 86 are respectively provided. There are perforated metal plates (not shown). A plurality of through holes smaller than the respective resin particles are provided on the perforated metal plate. Thereby, the passage of the gas is allowed, and the resin particles are prevented from flowing into the respective suction pipes 84, 85, 86.
並且，該預處理裝置1具有向裝置內的配管及料斗的內部供給惰性氣體即氮氣的複數個氮氣供給部89。如第1圖所示，在本實施形態中，在前頭料斗10、加熱料斗20、氣體加熱管31、冷卻料斗40、氣體冷卻管51、供給管61、第1搬送管81、第2搬送管82、第3搬送管83及合流管87上，分別連接有氮氣供給部89。 Further, the pretreatment apparatus 1 has a plurality of nitrogen gas supply portions 89 that supply an inert gas, that is, nitrogen gas, to the inside of the piping and the hopper in the apparatus. As shown in Fig. 1, in the present embodiment, the front hopper 10, the heating hopper 20, the gas heating pipe 31, the cooling hopper 40, the gas cooling pipe 51, the supply pipe 61, the first transfer pipe 81, and the second transfer pipe are provided. 82. The nitrogen supply unit 89 is connected to each of the third transfer pipe 83 and the junction pipe 87.
氮氣供給部89對上述各部供給與外部空氣壓力相比為正壓的經過乾燥的氮氣。因此，若使複數個氮氣供給部89動作，則氮氣填充於預處理裝置1內的樹脂顆粒的整個搬送路徑(從前頭料斗10經過第1搬送管81、第1搬送料斗24、加熱料斗20、第2搬送管82、第2搬送料斗44、冷卻料斗40、第3搬送管83及機載料斗60之後到達供給管61的路徑)。並且，預處理裝置1內的樹脂顆粒的搬送路徑與外部的環境壓力相比成為正壓。由此，可抑制外部氣體滲入到搬送路徑內。其結果，預處理裝置1內的樹脂顆粒的氧化得到抑制。 The nitrogen gas supply unit 89 supplies the dried nitrogen gas having a positive pressure to the external air pressure to the respective portions. Therefore, when a plurality of nitrogen gas supply units 89 are operated, nitrogen gas is filled in the entire transport path of the resin pellets in the pretreatment apparatus 1 (the first transfer pipe 81, the first transfer hopper 24, the heating hopper 20, and the first transfer pipe 10, The second transfer pipe 82, the second transfer hopper 44, the cooling hopper 40, the third transfer pipe 83, and the path of the air supply hopper 60 and then reach the supply pipe 61). Further, the transport path of the resin particles in the pretreatment apparatus 1 becomes a positive pressure as compared with the external environmental pressure. Thereby, it is suppressed that the outside air permeates into the conveyance path. As a result, oxidation of the resin particles in the pretreatment apparatus 1 is suppressed.
但是，氮氣供給部89的位置和數量並不限定於第1圖的例子。 However, the position and number of the nitrogen gas supply unit 89 are not limited to the example of Fig. 1 .
第2圖係比第1圖更詳細地表示射出成形機2的結構之圖。該射出成形機2將液體狀的樹脂填充於模具裝置290內的模穴空間293內，並藉由使所填充的樹脂固化而使樹脂產品成形。如第2圖所示，射出成形機2具備將液體狀的樹脂填充於模具裝置290內的射出裝置210、以及進行模具裝置290的閉模、合模、開模的合模裝置220。 模具裝置290具有固定模291及可動模292。在固定模291與可動模292之間形成有與樹脂產品的形狀相對應的模穴空間293。 Fig. 2 is a view showing the structure of the injection molding machine 2 in more detail than Fig. 1. The injection molding machine 2 fills a liquid resin in the cavity space 293 in the mold device 290, and molds the resin product by curing the filled resin. As shown in FIG. 2, the injection molding machine 2 includes an injection device 210 that fills a liquid resin in the mold device 290, and a mold clamping device 220 that performs mold closing, mold clamping, and mold opening of the mold device 290. The mold device 290 has a fixed mold 291 and a movable mold 292. A cavity space 293 corresponding to the shape of the resin product is formed between the fixed mold 291 and the movable mold 292.
射出裝置210具有沿水平延伸的筒狀容器即缸體211和水平地配置於缸體211內的螺桿212。在缸體211的後部上面設置有供給口213。在預處理裝置1中經過預處理的樹脂顆粒通過供給口213被供給到缸體211的內部。另一方面，在缸體211的前端部設置有射出噴嘴214。並且，在缸體211的外周設置有作為加熱源之加熱器215。 The injection device 210 has a cylinder 211 that is a cylindrical container that extends horizontally, and a screw 212 that is horizontally disposed in the cylinder 211. A supply port 213 is provided on the upper portion of the rear portion of the cylinder 211. The resin particles pretreated in the pretreatment apparatus 1 are supplied to the inside of the cylinder 211 through the supply port 213. On the other hand, an injection nozzle 214 is provided at the front end portion of the cylinder 211. Further, a heater 215 as a heating source is provided on the outer circumference of the cylinder 211.
螺桿212在缸體211內配設成旋轉自如且進退自如。射出裝置210具有用於使螺桿212旋轉的計量馬達216；和用於使螺桿212前後前進的射出馬達217。若驅動計量馬達216以使螺桿212旋轉，則樹脂顆粒沿螺桿212的螺旋狀的溝槽向前方(射出噴嘴214側)被搬送。樹脂顆粒向前方被搬送的同時，藉由來自加熱器215的熱量而逐漸熔融。其結果，樹脂顆粒成為液體狀樹脂。並且，隨著液體狀樹脂被搬送到螺桿212的前方並蓄積在缸體211的前端部附近，螺桿212後退並遠離射出噴嘴214。 The screw 212 is disposed in the cylinder 211 so as to be rotatable and freely retractable. The injection device 210 has a metering motor 216 for rotating the screw 212, and an injection motor 217 for advancing the screw 212 forward and backward. When the metering motor 216 is driven to rotate the screw 212, the resin particles are conveyed forward along the spiral groove of the screw 212 (on the side of the injection nozzle 214). The resin pellets are gradually transferred by the heat from the heater 215 while being conveyed forward. As a result, the resin particles become a liquid resin. Then, as the liquid resin is conveyed to the front of the screw 212 and accumulated in the vicinity of the front end portion of the cylinder 211, the screw 212 retreats away from the injection nozzle 214.
在該狀態下，若藉由驅動射出馬達217使螺桿212前進，則蓄積在螺桿212的前方的液體狀樹脂經由射出噴嘴214被填充於模具裝置290內的模穴空間293。之後，藉由進一步驅動射出馬達217而使螺桿212進一步前進。由此，模穴空間293內的樹脂被施加壓力，因收縮而導致不足量的樹脂得到補充。 In this state, when the screw 212 is advanced by driving the injection motor 217, the liquid resin accumulated in front of the screw 212 is filled in the cavity space 293 in the mold device 290 via the injection nozzle 214. Thereafter, the screw 212 is further advanced by further driving the injection motor 217. Thereby, the resin in the cavity space 293 is pressurized, and an insufficient amount of resin is replenished due to shrinkage.
合模裝置220具備供固定模291安裝的固定壓板221、供可動模292安裝的可動壓板222、使可動壓板222移動的肘節機構223。藉由使可動壓板222相對於固定壓板221沿繫桿224進退而進行閉模、合模及開模。並且，合模裝置220具有：使可動壓板222移動的合模馬達225；使組裝於可動壓板222上的頂出銷前後前進的頂出馬達226；及依模具裝置290的厚度使可動壓板222及肘節機構223移動的模厚馬達227。 The mold clamping device 220 includes a fixed platen 221 to which the fixed mold 291 is attached, a movable platen 222 to which the movable mold 292 is attached, and a toggle mechanism 223 that moves the movable platen 222. The movable platen 222 is moved, retracted, and opened by moving the movable platen 222 forward and backward along the tie bar 224. Further, the mold clamping device 220 includes a mold clamping motor 225 that moves the movable platen 222, an ejector motor 226 that advances the ejector pin assembled to the movable platen 222, and a movable platen 222 according to the thickness of the mold device 290. The die thickness motor 227 that the toggle mechanism 223 moves.
藉由驅動合模馬達225而使可動壓板222前進，從而進行模具裝置290的閉模。在閉模結束之後，產生在基於合模馬達225的推動力乘以肘節倍率的合模力，藉由合模力而進行合模。藉由該合模，在可動模292與固定模291之間形成模穴空間293。從射出裝置210被填充於模穴空間293的液體狀樹脂在模穴空間293內固化，成為樹脂產品。之後，藉由驅動合模馬達225而使可動壓板222後退，從而進行模具裝置290的開模。並且，藉由驅動頂出馬達226，從可動模292取出樹脂產品。 The movable platen 222 is advanced by driving the mold clamping motor 225, thereby closing the mold device 290. After the mold closing is completed, a mold clamping force based on the urging force of the mold clamping motor 225 multiplied by the toggle magnification is generated, and the mold clamping is performed by the mold clamping force. By this mold clamping, a cavity space 293 is formed between the movable mold 292 and the fixed mold 291. The liquid resin filled in the cavity space 293 from the injection device 210 is solidified in the cavity space 293 to become a resin product. Thereafter, the movable platen 222 is moved backward by driving the mold clamping motor 225, thereby opening the mold device 290. Further, the resin product is taken out from the movable mold 292 by driving the ejector motor 226.
第3圖係表示預處理裝置1及射出成形機2的控制系統的結構之方塊圖。預處理裝置1及射出成形機2分別具備用於控制各部份動作的控制部70、230。如第3圖所示，預處理裝置1的控制部70分別電性連接於上述送風機32、熱交換器33、送風機52、熱交換器53、開閉閥62、溫度感測器64、送風機88及複數個氮氣供給部89。射出成形機2的控制部230分別電性連接於射出成形機2 內的複數個馬達216、217、225、226、227及加熱器215。 Fig. 3 is a block diagram showing the configuration of a control system of the pretreatment apparatus 1 and the injection molding machine 2. Each of the pretreatment apparatus 1 and the injection molding machine 2 is provided with control units 70 and 230 for controlling the operation of each part. As shown in FIG. 3, the control unit 70 of the pretreatment apparatus 1 is electrically connected to the blower 32, the heat exchanger 33, the blower 52, the heat exchanger 53, the opening and closing valve 62, the temperature sensor 64, the blower 88, and A plurality of nitrogen supply units 89 are provided. The control unit 230 of the injection molding machine 2 is electrically connected to the injection molding machine 2 A plurality of motors 216, 217, 225, 226, 227 and a heater 215 are provided.
這些控制部70、230例如由具有CPU等運算處理部和記憶體的電腦或微型電腦構成。控制部70、230依據預先設定的程序或來自外部的輸入訊號來控制上述各部份動作。由此，進行樹脂顆粒的預處理及射出成形處理。 The control units 70 and 230 are configured by, for example, a computer or a microcomputer having an arithmetic processing unit such as a CPU and a memory. The control units 70 and 230 control the respective partial operations in accordance with a preset program or an input signal from the outside. Thereby, the pretreatment of the resin pellets and the injection molding process are performed.
另外，上述複數個控制對象中的一部份亦可以從控制部70、230分隔，而藉由手動進行操作。 In addition, a part of the plurality of control objects may be separated from the control units 70 and 230 by manual operation.
並且，如第1圖及第3圖所示，預處理裝置1的控制部70和射出成形機2的控制部230連接成彼此可進行通信。從而，在這些控制部70、230之間，彼此能夠交換請求訊號或必要的資料。由此，例如能夠彼此調整預處理裝置1的動作時刻和射出成形機2的動作時刻，以免發生樹脂顆粒的停滯或不足。並且，如後面所述，在本實施形態中，預處理裝置1的控制部70將從溫度感測器64獲得的測量結果發送到射出成形機2的控制部230。並且，射出成形機2的控制部230依據接收到的測量結果來調節加熱器215的輸出。 Further, as shown in FIGS. 1 and 3, the control unit 70 of the pretreatment apparatus 1 and the control unit 230 of the injection molding machine 2 are connected to each other for communication. Therefore, between these control units 70 and 230, request signals or necessary materials can be exchanged with each other. Thereby, for example, the operation timing of the pretreatment apparatus 1 and the operation timing of the injection molding machine 2 can be adjusted to each other to prevent stagnation or shortage of resin particles. Further, as will be described later, in the present embodiment, the control unit 70 of the preprocessing apparatus 1 transmits the measurement result obtained from the temperature sensor 64 to the control unit 230 of the injection molding machine 2. Further, the control unit 230 of the injection molding machine 2 adjusts the output of the heater 215 in accordance with the received measurement result.
接著，針對上述樹脂產品製造系統100中的樹脂顆粒的預處理及射出成形處理的流程進行說明。第4圖係表示樹脂產品製造系統100中的處理的一例的流程圖。 Next, the flow of the pretreatment and injection molding process of the resin pellets in the above-described resin product manufacturing system 100 will be described. Fig. 4 is a flow chart showing an example of processing in the resin product manufacturing system 100.
該樹脂產品製造系統100中，在製造樹脂產品時，首 先，從預處理裝置1的複數個氮氣供給部89開始供給氮氣。由此，對預處理裝置1內的樹脂顆粒的整個搬送路徑填充氮氣(步驟S1)。接著，取下前頭料斗10的蓋部12，並經由料斗主體11的開口13向料斗主體11內投入樹脂顆粒(步驟S2)。若樹脂顆粒的投入結束，則再次載置蓋部12，從而封閉料斗主體11的開口13。 In the resin product manufacturing system 100, when manufacturing a resin product, the first First, nitrogen gas is supplied from a plurality of nitrogen supply units 89 of the pretreatment apparatus 1. Thereby, the entire transport path of the resin pellets in the pretreatment apparatus 1 is filled with nitrogen gas (step S1). Next, the lid portion 12 of the front hopper 10 is removed, and resin pellets are introduced into the hopper main body 11 through the opening 13 of the hopper main body 11 (step S2). When the input of the resin pellets is completed, the lid portion 12 is placed again to close the opening 13 of the hopper body 11.
接著，使送風機88動作，在第1搬送管81、第2搬送管82及第3搬送管83的內部產生氮氣的氣流。從前頭料斗10的下部排出的樹脂顆粒通過第1搬送管81而被氣動搬送到第1搬送料斗24。並且，積存在第1搬送料斗24中的樹脂顆粒藉由投入口241開啟而被投入到加熱料斗20內(步驟S3)。 Then, the blower 88 is operated, and a flow of nitrogen gas is generated inside the first transfer pipe 81, the second transfer pipe 82, and the third transfer pipe 83. The resin pellets discharged from the lower portion of the front hopper 10 are pneumatically conveyed to the first conveying hopper 24 by the first conveying pipe 81. Then, the resin pellets accumulated in the first transfer hopper 24 are put into the heating hopper 20 by being opened by the inlet port 241 (step S3).
投入到加熱料斗20內的樹脂顆粒藉由加熱乾燥機構30而被加熱乾燥(步驟S4)。具體而言，藉由使送風機32及熱交換器33動作，氮氣的熱風從吹出口26被供給到加熱料斗20的內部。由此，樹脂顆粒被加熱，從而水份從樹脂顆粒蒸發，樹脂顆粒的水份含量降低。 The resin pellets charged into the heating hopper 20 are heated and dried by the heating and drying mechanism 30 (step S4). Specifically, by operating the blower 32 and the heat exchanger 33, hot air of nitrogen gas is supplied from the air outlet 26 to the inside of the heating hopper 20. Thereby, the resin particles are heated, whereby the water is evaporated from the resin particles, and the moisture content of the resin particles is lowered.
被加熱乾燥的樹脂顆粒從加熱料斗20的下部排出，並通過第2搬送管82被氣動搬送到第2搬送料斗44。並且，積存在第2搬送料斗44中的樹脂顆粒藉由投入口441開啟而被投入到冷卻料斗40內(步驟S5)。 The resin pellets heated and dried are discharged from the lower portion of the heating hopper 20, and are pneumatically transported to the second transfer hopper 44 by the second transfer pipe 82. Then, the resin particles accumulated in the second transfer hopper 44 are put into the cooling hopper 40 by being opened by the inlet port 441 (step S5).
投入到冷卻料斗40內的樹脂顆粒藉由冷卻機構50而被冷卻(步驟S6)。具體而言，藉由使送風機52及熱交換器53動作，低溫的氮氣從吹出口46被供給到冷卻料斗 40的內部。由此，樹脂顆粒的溫度降低。 The resin pellets charged into the cooling hopper 40 are cooled by the cooling mechanism 50 (step S6). Specifically, by operating the blower 52 and the heat exchanger 53, low-temperature nitrogen gas is supplied from the air outlet 46 to the cooling hopper. 40 inside. Thereby, the temperature of the resin particles is lowered.
如上所述，在預處理裝置1內的樹脂顆粒的搬送路徑上填充有氮氣。因此，在預處理裝置1內，樹脂顆粒中的氧含量逐漸降低，取而代之，樹脂顆粒中的氮氣的含量逐漸增加。尤其，樹脂顆粒中的氮氣的飽和含量隨著樹脂顆粒的溫度降低而增加。因此，在冷卻料斗40內，若使樹脂顆粒的溫度降低，則能夠使樹脂顆粒中的氮氣的含量進一步增加。其結果，在後述的射出成形時，能夠抑制因氧化而產生變色。 As described above, the transport path of the resin particles in the pretreatment apparatus 1 is filled with nitrogen gas. Therefore, in the pretreatment apparatus 1, the oxygen content in the resin particles is gradually lowered, and instead, the content of nitrogen in the resin particles is gradually increased. In particular, the saturated content of nitrogen in the resin particles increases as the temperature of the resin particles decreases. Therefore, when the temperature of the resin pellets is lowered in the cooling hopper 40, the content of nitrogen in the resin pellets can be further increased. As a result, it is possible to suppress discoloration due to oxidation at the time of injection molding to be described later.
然而，樹脂顆粒中的氮氣的飽和含量隨著周囲的壓力降低而減少。從而，假設若使冷卻料斗40內的壓力也與溫度一同降低，則無法使樹脂顆粒中的氮氣的飽和含量充份地增加。因此，在該預處理裝置1中，藉由從氮氣供給部89持續供給氮氣，將冷卻料斗40內的壓力維持大致恆定，且使樹脂顆粒的溫度降低。由此，能夠使樹脂顆粒中含有更大量的氮氣。 However, the saturated content of nitrogen in the resin particles decreases as the pressure of the helium is lowered. Therefore, if the pressure in the cooling hopper 40 is also lowered together with the temperature, the saturated content of nitrogen in the resin particles cannot be sufficiently increased. Therefore, in the pretreatment apparatus 1, by continuously supplying nitrogen gas from the nitrogen gas supply unit 89, the pressure in the cooling hopper 40 is maintained substantially constant, and the temperature of the resin pellets is lowered. Thereby, a larger amount of nitrogen gas can be contained in the resin particles.
並且，在步驟S6中，與外部的環境壓力相比，冷卻料斗40內的壓力成為正壓。由此，樹脂顆粒中的氮氣的含量進一步提高。然而，在射出成形時，為了防止因減壓而產生氣泡，最好將冷卻料斗40內的壓力設為比射出成形機2中的樹脂的射出壓力低的壓力。並且，冷卻料斗40內的壓力最好小於成為高壓氣體安全法的對象的1MPa，以免限制裝置設計的自由度。具體而言，只要步驟S6中的冷卻料斗40內的壓力設為比環境壓力略高程度 的壓力即可。 Further, in step S6, the pressure in the cooling hopper 40 becomes a positive pressure as compared with the external environmental pressure. Thereby, the content of nitrogen in the resin particles is further increased. However, at the time of injection molding, in order to prevent generation of bubbles due to decompression, it is preferable to set the pressure in the cooling hopper 40 to a pressure lower than the injection pressure of the resin in the injection molding machine 2. Further, the pressure in the cooling hopper 40 is preferably less than 1 MPa which is the object of the high pressure gas safety method, so as not to limit the degree of freedom in design of the apparatus. Specifically, as long as the pressure in the cooling hopper 40 in the step S6 is set to be slightly higher than the environmental pressure The pressure can be.
第5圖係表示冷卻料斗40內的樹脂顆粒的溫度變化的例子之曲線圖。第5圖的橫軸表示冷卻開始後的時間。第5圖的縱軸表示樹脂顆粒的溫度。並且，第5圖中用實線來表示本實施形態之樹脂顆粒的溫度變化，作為比較例，用兩點虛線來表示樹脂顆粒藉由環境溫度而自然冷卻時的樹脂顆粒的溫度變化。 Fig. 5 is a graph showing an example of temperature change of resin particles in the cooling hopper 40. The horizontal axis of Fig. 5 indicates the time after the start of cooling. The vertical axis of Fig. 5 indicates the temperature of the resin particles. Further, in Fig. 5, the temperature change of the resin pellets of the present embodiment is indicated by a solid line, and as a comparative example, the temperature change of the resin pellets when the resin pellets are naturally cooled by the ambient temperature is indicated by a two-dotted broken line.
在第5圖中，冷卻前的溫度Tb為成為處理對象的樹脂顆粒的加熱乾燥後的溫度，例如設為100℃~150℃。另一方面，冷卻後的溫度Ta係用於將樹脂顆粒中的氮氣含量設為所希望的值的溫度，例如，設為比裝置外部的環境溫度Te略高的溫度。具體而言，冷卻後的溫度Ta例如設為60℃以下即可，為了進一步提高氮氣的含量亦可以設為40℃以下。 In the fifth drawing, the temperature Tb before cooling is a temperature after heating and drying of the resin particles to be treated, and is, for example, 100 to 150 °C. On the other hand, the temperature Ta after cooling is a temperature for setting the nitrogen content in the resin particles to a desired value, and is, for example, a temperature slightly higher than the ambient temperature Te outside the apparatus. Specifically, the temperature Ta after cooling may be, for example, 60° C. or lower, and may be 40° C. or lower in order to further increase the content of nitrogen gas.
如第5圖所示，在步驟S6中，至少在冷卻的初始階段，使冷卻料斗40內的樹脂顆粒的溫度比自然冷卻更緩慢地降低。這能夠藉由例如將熱交換器53的冷媒的溫度設定為比冷卻前的樹脂顆粒的溫度低，且比外部的環境溫度高的溫度而實現。 As shown in Fig. 5, in step S6, the temperature of the resin particles in the cooling hopper 40 is lowered more slowly than the natural cooling at least in the initial stage of cooling. This can be achieved, for example, by setting the temperature of the refrigerant of the heat exchanger 53 to be lower than the temperature of the resin particles before cooling and higher than the external ambient temperature.
如此，若使樹脂顆粒的溫度比自然冷卻更緩慢地降低，則能夠延長樹脂顆粒為高溫的期間。在高溫時，雖然樹脂顆粒中的氮氣的平衡狀態下的飽和含量較低，但是與低溫時相比，氮分子相對於樹脂顆粒的溶解及擴散更明顯地發生。從而，藉由延長高溫的期間，能夠使樹脂顆粒中 含有足夠的氮氣，同時能夠逐漸提高樹脂顆粒的飽和含量。如此一來，能夠進一步增加冷卻後的樹脂顆粒中的惰性氣體的含量。其結果，在後述的射出成形時，能夠進一步抑制因氧化而產生變色。 As described above, when the temperature of the resin particles is lowered more slowly than the natural cooling, the period in which the resin particles are at a high temperature can be prolonged. At a high temperature, although the saturated content in the equilibrium state of nitrogen in the resin particles is low, the dissolution and diffusion of nitrogen molecules with respect to the resin particles occur more significantly than in the case of low temperature. Therefore, by extending the high temperature period, the resin particles can be made Contains enough nitrogen to gradually increase the saturation content of the resin particles. As a result, the content of the inert gas in the cooled resin particles can be further increased. As a result, discoloration due to oxidation can be further suppressed at the time of injection molding to be described later.
並且，如第5圖所示，在本實施形態中，隨著時間的經過，樹脂顆粒的每單位時間的溫度降低幅度增大。由此，能夠抑制冷卻樹脂顆粒所需的總時間，而且能夠延長樹脂顆粒為高溫的期間。從而，能夠使樹脂顆粒中含有足夠的惰性氣體，同時使樹脂顆粒的溫度降低，且還能夠縮短處理時間。 Further, as shown in Fig. 5, in the present embodiment, the temperature decrease per unit time of the resin particles increases as time passes. Thereby, it is possible to suppress the total time required for cooling the resin particles, and it is possible to extend the period in which the resin particles are at a high temperature. Thereby, it is possible to contain sufficient inert gas in the resin particles while lowering the temperature of the resin particles, and it is also possible to shorten the processing time.
若樹脂顆粒冷卻至溫度Ta，則冷卻後的樹脂顆粒從冷卻料斗40的下部排出，並通過第3搬送管83被氣動搬送到機載料斗60(步驟S7)。並且，依來自射出成形機2的控制部230的要求，預處理裝置1的控制部70開啟開閉閥62。由此，從機載料斗60通過供給管61向射出成形機2的缸體211內供給樹脂顆粒(步驟S8)。 When the resin pellets are cooled to the temperature Ta, the cooled resin pellets are discharged from the lower portion of the cooling hopper 40, and are pneumatically conveyed to the airborne hopper 60 by the third transfer pipe 83 (step S7). Further, the control unit 70 of the pretreatment apparatus 1 opens the opening and closing valve 62 in response to a request from the control unit 230 of the injection molding machine 2. Thereby, resin pellets are supplied from the airborne hopper 60 to the cylinder 211 of the injection molding machine 2 through the supply pipe 61 (step S8).
此時，藉由從氮氣供給部89供給氮氣，與外部的環境壓力相比，機載料斗60內的壓力成為正壓。並且，從供給管61的排出口63經由止回閥631向外部持續排出氮氣。因此，假設即使氣體從射出成形機2的缸體211向供給管61逆流，該氣體亦從排出口63向外部排出。由此，得以抑制缸體211內的氣體成份接觸機載料斗60內的樹脂顆粒。並且，在向缸體211供給樹脂顆粒之前，能夠抑制樹脂顆粒的溫度上升。 At this time, by supplying nitrogen gas from the nitrogen gas supply unit 89, the pressure in the airborne hopper 60 becomes a positive pressure as compared with the external environmental pressure. Further, nitrogen gas is continuously discharged to the outside from the discharge port 63 of the supply pipe 61 via the check valve 631. Therefore, even if the gas flows back from the cylinder 211 of the injection molding machine 2 to the supply pipe 61, the gas is discharged to the outside from the discharge port 63. Thereby, it is possible to suppress the gas component in the cylinder 211 from contacting the resin particles in the airborne hopper 60. Further, before the resin particles are supplied to the cylinder 211, the temperature rise of the resin pellets can be suppressed.
若樹脂顆粒被供給到缸體211內，則射出成形機2的控制部230使缸體211內的螺桿212旋轉。由此，樹脂顆粒向射出噴嘴214側移動。並且，缸體211內的樹脂顆粒藉由加熱器215而被加熱並熔融，成為可流動的液相(步驟S9)。 When the resin pellets are supplied into the cylinder 211, the control unit 230 of the injection molding machine 2 rotates the screw 212 in the cylinder 211. Thereby, the resin particles move toward the injection nozzle 214 side. Then, the resin particles in the cylinder 211 are heated and melted by the heater 215 to become a flowable liquid phase (step S9).
此時，預處理裝置1的控制部70將溫度感測器64的測量結果發送到射出成形機2的控制部230。並且，射出成形機2的控制部230依據接收到的測量結果來控制加熱器215的輸出。由此，將射出噴嘴214前方的樹脂顆粒的溫度控制成大致恆定。 At this time, the control unit 70 of the preprocessing apparatus 1 transmits the measurement result of the temperature sensor 64 to the control unit 230 of the injection molding machine 2. Further, the control unit 230 of the injection molding machine 2 controls the output of the heater 215 in accordance with the received measurement result. Thereby, the temperature of the resin particles in front of the injection nozzle 214 is controlled to be substantially constant.
具體而言，例如對溫度感測器64的測量結果和預先設定的目標溫度進行比較，若測量結果比目標溫度低，則提高加熱器215的輸出，若測量結果比目標溫度高，則降低加熱器215的輸出。如此一來，能夠使缸體211內的樹脂顆粒的熔融位置穩定。從而，例如藉由使樹脂顆粒在射出噴嘴214的正前方熔融，能夠縮短比熔融溫度更高溫的期間。其結果，能夠進一步抑制因樹脂的氧化而產生之變色。 Specifically, for example, the measurement result of the temperature sensor 64 is compared with a preset target temperature, and if the measurement result is lower than the target temperature, the output of the heater 215 is increased, and if the measurement result is higher than the target temperature, the heating is lowered. The output of the 215. In this way, the melting position of the resin particles in the cylinder 211 can be stabilized. Therefore, for example, by melting the resin particles directly in front of the injection nozzle 214, a period higher than the melting temperature can be shortened. As a result, discoloration due to oxidation of the resin can be further suppressed.
另外，亦可以使用輸出恆定且僅能夠切換開啟/關閉的加熱器來代替輸出可變的加熱器215。在該情況下，若缸體211內的溫度比設定溫度低，則加熱器被開啟，若缸體211內的溫度比設定溫度高，則加熱器被關閉。在該情況下，亦可以依據供給口213附近的溫度感測器64的測量結果，改變構成加熱器的開啟/關閉的臨界值的設定溫 度。例如，若溫度感測器64的測量結果比目標溫度低，則提高缸體211內的設定溫度，若溫度感測器64的測量結果比目標溫度高，則降低缸體211內的設定溫度。如此一來，如同上述，能夠使缸體211內的樹脂顆粒的熔融位置穩定。 In addition, instead of the output variable heater 215, a heater whose output is constant and can only be switched on/off can be used. In this case, if the temperature in the cylinder 211 is lower than the set temperature, the heater is turned on, and if the temperature in the cylinder 211 is higher than the set temperature, the heater is turned off. In this case, it is also possible to change the set temperature of the threshold value of the opening/closing of the heater in accordance with the measurement result of the temperature sensor 64 in the vicinity of the supply port 213. degree. For example, if the measurement result of the temperature sensor 64 is lower than the target temperature, the set temperature in the cylinder 211 is increased, and if the measurement result of the temperature sensor 64 is higher than the target temperature, the set temperature in the cylinder 211 is lowered. As described above, as described above, the melting position of the resin particles in the cylinder 211 can be stabilized.
然後，熔融樹脂藉由因螺桿212的前進而產生之壓力而從射出噴嘴214被射出，並且被填充在模具裝置290內的模穴空間293。並且，在該模穴空間293內，由於樹脂被冷卻固化使得樹脂產品(在本實施形態中為透明的光學組件)成形(步驟S10)。從射出噴嘴214射出時，樹脂中的氮氣的含量亦比較多，因此不易產生樹脂的氧化。從而，能夠獲得變色得到抑制的樹脂產品。 Then, the molten resin is ejected from the injection nozzle 214 by the pressure generated by the advancement of the screw 212, and is filled in the cavity space 293 in the mold device 290. Further, in the cavity space 293, the resin product (in the present embodiment, a transparent optical component) is formed by the resin being cooled and solidified (step S10). When the injection nozzle 214 is ejected, the content of nitrogen in the resin is also relatively large, so that oxidation of the resin is less likely to occur. Thereby, a resin product in which discoloration is suppressed can be obtained.
另外，在上述說明中，按照樹脂顆粒的流動製程依次進行了說明，但是，這些製程亦可以同時進行。亦即，對於一部份樹脂顆粒和其他樹脂顆粒，不同的製程可以同時進行，亦可以所有的製程連續進行處理。 Further, in the above description, the flow process of the resin pellets has been sequentially described, but these processes may be simultaneously performed. That is, for a part of the resin particles and other resin particles, different processes can be performed simultaneously, or all processes can be continuously processed.
以上，對本發明的一實施形態進行了說明，但本發明並不限定於上述實施形態。 Although an embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.
第6圖係表示一變形例之冷卻料斗40內的樹脂顆粒的溫度變化之曲線圖。在第6圖的例中，至少在冷卻的初始階段，樹脂顆粒的溫度逐步降低。這可以例如藉由間斷地開啟關閉熱交換器53來實現。如此一來，能夠延長樹 脂顆粒保持高溫且恆定溫度的期間。從而，能夠使樹脂顆粒中含有足夠的氮氣，同時能夠使樹脂顆粒的溫度降低。 Fig. 6 is a graph showing changes in temperature of resin particles in the cooling hopper 40 of a modification. In the example of Fig. 6, the temperature of the resin particles is gradually lowered at least in the initial stage of cooling. This can be achieved, for example, by intermittently opening and closing the heat exchanger 53. In this way, the tree can be extended The period during which the lipid particles remain at a high temperature and a constant temperature. Thereby, sufficient nitrogen gas can be contained in the resin particles, and the temperature of the resin particles can be lowered.
另外，在冷卻料斗40內的樹脂顆粒冷卻之後，有時無法立刻從冷卻料斗40排出樹脂顆粒。在這種情況下，亦可使冷卻後的樹脂顆粒在冷卻料斗40內進行調溫且待機。例如，如第7圖及第8圖的曲線圖，亦可以在將樹脂顆粒冷卻至溫度Ta之後，使樹脂顆粒在冷卻料斗40內維持溫度Ta且待機。溫度的維持可藉由使冷卻機構50作為調溫機構動作來實現。如此一來，能夠防止樹脂顆粒的溫度成為比目標溫度Ta更低的溫度。從而，能夠從冷卻料斗40始終以恆定的溫度Ta排出樹脂顆粒。 Further, after the resin pellets in the cooling hopper 40 are cooled, the resin pellets may not be immediately discharged from the cooling hopper 40. In this case, the cooled resin pellets may be tempered in the cooling hopper 40 and stand by. For example, as shown in the graphs of Figs. 7 and 8, after the resin pellets are cooled to the temperature Ta, the resin pellets are maintained in the cooling hopper 40 at a temperature Ta and stand by. The maintenance of the temperature can be achieved by operating the cooling mechanism 50 as a temperature control mechanism. In this way, it is possible to prevent the temperature of the resin particles from becoming lower than the target temperature Ta. Thereby, the resin pellets can be discharged from the cooling hopper 40 at a constant temperature Ta at all times.
並且，從冷卻料斗40到射出成形機2的缸體211期間，亦可以主動地控制樹脂顆粒的溫度。例如，如第9圖所示，亦可以在機載料斗60及供給管61的周圍安裝作為調溫機構的帶式加熱器65，藉由帶式加熱器65的熱量來維持樹脂顆粒的溫度大致恆定。由此，能夠抑制從冷卻料斗40排出的樹脂顆粒的溫度在機載料斗60內或供給管61內降低。從而，能夠使供給到缸體211的樹脂顆粒的溫度更穩定。其結果，能夠進一步穩定地使樹脂產品成形。另外，亦可以使用熱風供給機構等其他調溫機構來代替帶式加熱器65。並且，作為供給管61周圍的調溫機構，亦可以設置由玻璃棉、聚氨酯發泡體、或者矽膠發泡體等製作的保溫材料來代替帶式加熱器65，並藉由該保溫材料來將樹脂顆粒的溫度維持大致恆定。 Further, during the period from the cooling hopper 40 to the cylinder 211 of the injection molding machine 2, the temperature of the resin pellets can also be actively controlled. For example, as shown in Fig. 9, a band heater 65 as a temperature adjustment mechanism may be attached around the airborne hopper 60 and the supply pipe 61, and the temperature of the resin pellets may be maintained by the heat of the band heater 65. Constant. Thereby, it is possible to suppress the temperature of the resin particles discharged from the cooling hopper 40 from decreasing in the inside of the airborne hopper 60 or in the supply pipe 61. Thereby, the temperature of the resin particles supplied to the cylinder 211 can be made more stable. As a result, the resin product can be further stably molded. Further, instead of the band heater 65, another temperature adjustment mechanism such as a hot air supply mechanism may be used. Further, as the temperature adjustment mechanism around the supply pipe 61, a heat insulating material made of glass wool, a polyurethane foam, or a silicone foam may be provided instead of the band heater 65, and the heat insulating material may be used. The temperature of the resin particles is maintained substantially constant.
第10圖係表示其他變形例之預處理裝置1及射出成形機2的結構之圖。第7圖的例子中，冷卻料斗40配置在射出成形機2的缸體211的上方。並且，冷卻料斗40和缸體211不經由其他料斗而連接。冷卻料斗40和缸體211經由供給管61而連接，在該供給管61上設置有排出口63。如此一來，在冷卻料斗40中冷卻的樹脂顆粒能夠從冷卻料斗40迅速地供給到缸體211。並且，與上述實施形態相比，藉由減少料斗的數量，能夠使預處理裝置1構成得更簡化。 Fig. 10 is a view showing the configuration of the pretreatment apparatus 1 and the injection molding machine 2 of another modification. In the example of Fig. 7, the cooling hopper 40 is disposed above the cylinder 211 of the injection molding machine 2. Further, the cooling hopper 40 and the cylinder 211 are connected without being connected to other hoppers. The cooling hopper 40 and the cylinder 211 are connected via a supply pipe 61, and a discharge port 63 is provided in the supply pipe 61. As a result, the resin pellets cooled in the cooling hopper 40 can be quickly supplied from the cooling hopper 40 to the cylinder block 211. Further, the pretreatment apparatus 1 can be simplified in comparison with the above-described embodiment by reducing the number of hoppers.
並且，在上述實施形態中，在不同的料斗內進行了樹脂顆粒的加熱乾燥和冷卻，但是，亦可以在單一的料斗內進行這些處理。亦即，亦可以在一個料斗內將加熱乾燥機構30和冷卻機構50進行連接，並且在該一個料斗的內部進行從加熱乾燥到冷卻的處理。 Further, in the above embodiment, the resin pellets are heated and dried and cooled in different hoppers, but these treatments may be carried out in a single hopper. That is, the heating and drying mechanism 30 and the cooling mechanism 50 may be connected in one hopper, and the treatment from heat drying to cooling may be performed inside the one hopper.
並且，在上述實施形態中，藉由熱風對加熱料斗20內的樹脂顆粒進行了加熱，但是，亦可以利用帶式加熱器等其他加熱手段來加熱樹脂顆粒。 Further, in the above embodiment, the resin pellets in the heating hopper 20 are heated by hot air, but the resin pellets may be heated by other heating means such as a belt heater.
並且，在上述實施形態中，作為惰性氣體使用了氮氣，但是，作為本發明的惰性氣體，只要是包含在樹脂顆粒而能夠抑制樹脂顆粒的氧化的氣體即可。例如，亦可以將二氧化碳或氬氣作為惰性氣體使用，以代替氮氣。 In addition, in the above-described embodiment, nitrogen gas is used as the inert gas. However, the inert gas of the present invention may be a gas which is contained in the resin particles and can suppress oxidation of the resin particles. For example, carbon dioxide or argon may also be used as an inert gas instead of nitrogen.
並且，在上述實施形態中使用的樹脂顆粒為成形材料的一例。作為成形材料，亦可以使用樹脂顆粒以外的材料。 Further, the resin particles used in the above embodiment are examples of the molding material. As the molding material, materials other than the resin particles can also be used.
並且，關於預處理裝置及射出成形機的細節結構，亦可以不同於本申請案的各圖中示出的結構。 Further, the detailed structure of the pretreatment apparatus and the injection molding machine may be different from the structure shown in each drawing of the present application.
並且，上述實施形態或變形例中出現的各要件在不產生矛盾的範圍內亦可以適當地進行組合。 Further, each of the elements appearing in the above-described embodiment or modification may be combined as appropriate within a range in which no contradiction occurs.
1‧‧‧預處理裝置 1‧‧‧Pretreatment device
2‧‧‧射出成形機 2‧‧‧ Injection molding machine
10‧‧‧前頭料斗 10‧‧‧Front hopper
11‧‧‧料斗主體 11‧‧‧The main body of the hopper
12‧‧‧蓋部 12‧‧‧ 盖部
13‧‧‧開口 13‧‧‧ openings
20‧‧‧加熱料斗 20‧‧‧heating hopper
21‧‧‧側壁 21‧‧‧ side wall
22‧‧‧底部 22‧‧‧ bottom
23‧‧‧頂板部 23‧‧‧ top board
24‧‧‧第1搬送料斗 24‧‧‧1st transport hopper
25‧‧‧吸引口 25‧‧‧Attraction
26‧‧‧吹出口 26‧‧‧Blowing out
30‧‧‧加熱乾燥機構 30‧‧‧heating and drying mechanism
31‧‧‧氣體加熱管 31‧‧‧ gas heating tube
32‧‧‧送風機 32‧‧‧Air blower
33‧‧‧熱交換器 33‧‧‧ heat exchanger
40‧‧‧冷卻料斗 40‧‧‧cooling hopper
41‧‧‧側壁 41‧‧‧ side wall
42‧‧‧底部 42‧‧‧ bottom
43‧‧‧頂板部 43‧‧‧ top board
44‧‧‧第2搬送料斗 44‧‧‧2nd transport hopper
45‧‧‧吸引口 45‧‧‧ attracting mouth
46‧‧‧吹出口 46‧‧‧ blowing out
50‧‧‧冷卻機構 50‧‧‧Cooling mechanism
51‧‧‧氣體冷卻管 51‧‧‧ gas cooling tube
52‧‧‧送風機 52‧‧‧Air blower
53‧‧‧熱交換器 53‧‧‧ heat exchanger
60‧‧‧機載料斗 60‧‧‧Airborne hopper
61‧‧‧供給管 61‧‧‧Supply tube
62‧‧‧開閉閥 62‧‧‧Opening and closing valve
63‧‧‧排出口 63‧‧‧Export
64‧‧‧溫度感測器 64‧‧‧Temperature Sensor
70‧‧‧控制部 70‧‧‧Control Department
81‧‧‧第1搬送管 81‧‧‧1st transport tube
82‧‧‧第2搬送管 82‧‧‧2nd transport tube
83‧‧‧第3搬送管 83‧‧‧3rd transport tube
84‧‧‧第1吸入管 84‧‧‧1st suction pipe
85‧‧‧第2吸入管 85‧‧‧2nd suction pipe
86‧‧‧第3吸入管 86‧‧‧3rd suction tube
87‧‧‧合流管 87‧‧‧Confluence tube
88‧‧‧送風機 88‧‧‧Air blower
89‧‧‧氮氣供給部 89‧‧‧Nitrogen Supply Department
100‧‧‧樹脂產品製造系統 100‧‧‧Resin product manufacturing system
211‧‧‧缸體 211‧‧‧Cylinder
214‧‧‧射出噴嘴 214‧‧‧Injection nozzle
215‧‧‧加熱器 215‧‧‧heater
230‧‧‧控制部 230‧‧‧Control Department
241‧‧‧投入口 241‧‧‧ input
290‧‧‧模具裝置 290‧‧‧Molding device
441‧‧‧投入口 441‧‧‧ input
631‧‧‧止回閥 631‧‧‧ check valve
A1、A2、A3、A4、A5、A6‧‧‧箭頭 A1, A2, A3, A4, A5, A6‧‧‧ arrows
Claims (29)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014136312 | 2014-07-01 | ||
| JP2014-136312 | 2014-07-01 | ||
| JP2015-109397 | 2015-05-29 | ||
| JP2015109397A JP6567879B2 (en) | 2014-07-01 | 2015-05-29 | Molding material pre-processing method, pre-processing apparatus, and injection molding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW201601893A true TW201601893A (en) | 2016-01-16 |
| TWI688466B TWI688466B (en) | 2020-03-21 |
Family
ID=55352544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW104121155A TWI688466B (en) | 2014-07-01 | 2015-06-30 | Pretreatment method of molding material, pretreatment device, injection molding machine and injection molding method |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6567879B2 (en) |
| KR (1) | KR102294128B1 (en) |
| TW (1) | TWI688466B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111673997A (en) * | 2020-06-22 | 2020-09-18 | 惠州市旭辉塑胶科技有限公司 | Injection molding process of plastic material air purifier shell |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017148972A (en) * | 2016-02-22 | 2017-08-31 | 住友ベークライト株式会社 | Method for producing resin molding |
| DE112022001716T5 (en) | 2021-03-25 | 2024-01-11 | Sumitomo Heavy Industries, Ltd. | MATERIAL PREHEATING DEVICE AND INJECTION DEVICE |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH069789Y2 (en) * | 1986-05-22 | 1994-03-16 | 株式会社田中鉄工所 | Resin pellet dryer |
| US5042169A (en) * | 1990-04-18 | 1991-08-27 | Exxon Chemical Patents Inc. | Interstage separator |
| JPH1087752A (en) | 1996-09-09 | 1998-04-07 | Mitsui Petrochem Ind Ltd | Cyclic olefin-based resin pellet |
| JPH10156907A (en) * | 1996-11-26 | 1998-06-16 | Ube Ind Ltd | Heating of plasticizing material |
| JP3936792B2 (en) * | 1998-02-18 | 2007-06-27 | 株式会社松井製作所 | Continuous powder temperature controller |
| JP3697144B2 (en) * | 2000-06-14 | 2005-09-21 | キヤノン株式会社 | Foam molding method and apparatus |
| JP4721385B2 (en) * | 2001-07-02 | 2011-07-13 | キヤノン株式会社 | Method and apparatus for supplying resin material to injection molding machine |
| JP2005271524A (en) * | 2004-03-26 | 2005-10-06 | Nippon Zeon Co Ltd | Resin molding apparatus and resin molding method |
| JP5138183B2 (en) * | 2005-06-14 | 2013-02-06 | 東芝機械株式会社 | Injection molding method and injection molding machine |
| JP2008055883A (en) * | 2006-08-30 | 2008-03-13 | Fukuhara Co Ltd | Method and device for feeding nitrogen gas to dehumidifying dryer |
| WO2010031823A1 (en) * | 2008-09-19 | 2010-03-25 | Lanxess International Sa | Process for the production of water and solvent-free polymers |
| JP5669376B2 (en) * | 2008-11-04 | 2015-02-12 | 株式会社カワタ | Drying device for powder |
| JP5704881B2 (en) * | 2010-10-15 | 2015-04-22 | 中村科学工業株式会社 | Hopper dryer for drying equipment for granular plastic materials |
| JP2012180999A (en) * | 2011-03-03 | 2012-09-20 | Kawata Mfg Co Ltd | Drying system and drying method |
-
2015
- 2015-05-29 JP JP2015109397A patent/JP6567879B2/en active Active
- 2015-06-30 TW TW104121155A patent/TWI688466B/en active
- 2015-07-01 KR KR1020150094024A patent/KR102294128B1/en active IP Right Grant
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111673997A (en) * | 2020-06-22 | 2020-09-18 | 惠州市旭辉塑胶科技有限公司 | Injection molding process of plastic material air purifier shell |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI688466B (en) | 2020-03-21 |
| JP2016026919A (en) | 2016-02-18 |
| JP6567879B2 (en) | 2019-08-28 |
| KR102294128B1 (en) | 2021-08-27 |
| KR20160004212A (en) | 2016-01-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2896441C (en) | Molding system | |
| US20120266567A1 (en) | Method and device for producing filled containers | |
| TW201601893A (en) | Pretreatment method and pretreatment device of molding material, injection molding machine, and injection molding method | |
| KR20080086897A (en) | Injecting apparatus | |
| JP5868738B2 (en) | Injection molding machine | |
| JP5783901B2 (en) | Method and apparatus for blow molding containers | |
| JP5669376B2 (en) | Drying device for powder | |
| US20230158713A1 (en) | Process for drying granular polymeric material and plant operating according to said process | |
| JP3208382U (en) | Drying equipment | |
| JP3697144B2 (en) | Foam molding method and apparatus | |
| JP2007083594A (en) | Resin pellet drying device | |
| KR101359469B1 (en) | A manufacturing equipment of vegetable gelatin capsule | |
| ITPN990031A1 (en) | PROCEDURE AND PERFECTED PLANT FOR THE DEIMATERIAL TREATMENT IN THE PRODUCTION OF CABLES IN P.E.T. | |
| TWI752690B (en) | Optical lens molding device | |
| JPS61120723A (en) | Parison cooling device | |
| JP2003103566A (en) | Equipment for removing gas for melt molding machine | |
| CN105291300A (en) | Method and machine for pre-processing of molding material, injection molding machine and injection molding method | |
| KR101532829B1 (en) | Agitating and Drying apparatus for plastic material using NIR | |
| JP6409019B2 (en) | Moisture percentage adjustment mechanism for injection molding machine, injection molding machine with moisture percentage adjustment function | |
| JP2022149990A (en) | Material preheating apparatus and injection apparatus | |
| JP4915663B2 (en) | Injection molding apparatus and injection molding method | |
| WO2016103389A1 (en) | Molding material supply system and molding material supply method | |
| JP2022149991A (en) | Material preheating apparatus and injection apparatus | |
| CN113453860A (en) | Apparatus for processing polymeric materials | |
| JP2015229243A (en) | Feeder of plastic pellet |