WO2005028184A1 - 樹脂材料の可塑化用スクリュー及び可塑化機構 - Google Patents
樹脂材料の可塑化用スクリュー及び可塑化機構 Download PDFInfo
- Publication number
- WO2005028184A1 WO2005028184A1 PCT/JP2004/014318 JP2004014318W WO2005028184A1 WO 2005028184 A1 WO2005028184 A1 WO 2005028184A1 JP 2004014318 W JP2004014318 W JP 2004014318W WO 2005028184 A1 WO2005028184 A1 WO 2005028184A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- screw
- resin material
- plasticizing
- outer diameter
- designed
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/58—Details
- B29C45/581—Devices for influencing the material flow, e.g. "torpedo constructions" or mixing devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/58—Details
- B29C45/60—Screws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/52—Screws with an outer diameter varying along the longitudinal axis, e.g. for obtaining different thread clearance
- B29C48/525—Conical screws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/53—Screws having a varying channel depth, e.g. varying the diameter of the longitudinal screw trunk
Definitions
- the present invention relates to a plasticizing screw and a plasticizing mechanism for a resin material used in an injection molding machine or an extrusion molding machine for discharging a plasticized resin material to obtain a resin molded product.
- a plasticizing screw (hereinafter simply referred to as a “screw”) that is provided in a plasticizing cylinder for plasticizing and sending out the resin material, which is used for injection molding and extrusion molding of the resin material, is generally used.
- the length L of the portion where the spiral screw flight is formed on the outer peripheral surface (hereinafter, this length is referred to as the effective length L of the screw) is the diameter D of the top of the screw flight (hereinafter, this diameter is the screw length). If the ratio (hereinafter referred to as L / D) divided by the outer diameter (described as D) is 10 or less, the plasticized state of the resin material is not stable. For this reason, if such an L / D design screw is used, unmelted resin or semi-molten resin is discharged from the plasticizing cylinder or the injection cylinder, and molding defects may occur or molding may not be possible.
- a screw designed to have an L / D of 24 for wire coating and an L / D of 18 to 20 for injection molding is used.
- L / D design for example, even if the outer diameter D of the screw is about 2 O mm, the effective length L of the screw is 4 It is about 80 mm, and it is over 360 mm for injection molding screws. Thus, the outside diameter of the screen!
- it is difficult to reduce the size of the injection molding machine or extrusion molding machine because the effective length L and overall length of the screw cannot be shortened even if the size is reduced.
- each of the above patent documents uses a large-diameter or conical screw to increase the area for applying shear to the resin material, to promote plasticization due to shear heat, and to increase the plasticized state of the resin material.
- the aim is to stabilize
- using a large diameter screw can shorten the effective length of the screw, but does not necessarily reduce the occupied volume.
- to drive a large-diameter screw it is necessary to increase the size of the drive system, such as a motor. For this reason, it is difficult to reduce the size of injection molding machines and extrusion molding machines. Also, the combination of a conical screw and a conical plasticizing cylinder is relatively difficult to process.
- a configuration is also used in which a spindle-shaped member called a torpedo (also called a spreader) is disposed near the tip of the plasticizing cylinder.
- a spindle-shaped member called a torpedo also called a spreader
- the shear rate of the resin material is increased to promote shear heat generation, thereby stabilizing the plasticized state of the resin material.
- a material consisting of a powder of cellulosic material and resin is fed into the resin reservoir formed between the screw and the top screw with a screw, and the screw is advanced to move the molten resin between the tape and the barrel.
- a configuration for injecting through a formed flow path has been proposed (see Japanese Patent Application Laid-Open No. 11-198164).
- Japanese Patent Application Laid-Open No. Hei 11-1989 describes that plasticization of resin by shear heat, which is generally known, and topeed groove shape for adjusting the surface appearance and touch are disclosed. It is stated that the torpedo will be changed, but the support structure and mounting structure of the torpedo are not clear. Also, the screws are short and special, but how much LZD is different from 18 to 20 for general injection molding and the specific structure of the screw are not disclosed. .
- the problem to be solved by the present invention is to reduce the L / D without excessively increasing the outer diameter of the screw to reduce the size of an injection molding machine or an extrusion molding machine, and Even if the screw is shortened, it maintains a uniform plasticized state of the resin material and stabilizes the ejection of the plasticized resin material. It is an object of the present invention to provide a screw for plasticizing a resin material and a plasticizing mechanism. Disclosure of the invention
- an invention according to claim 1 is a plasticizing screw disposed in a plasticizing cylinder for plasticizing a resin material for molding, the plasticizing screw being formed at a tip of a screw.
- Outer diameter of the metering part to be used! Is 100 mm or less, and the ratio L / D is obtained by dividing the length L of the portion where the spiral screw fly is formed on the outer peripheral surface of the screw by the outer diameter D of the ring portion.
- the screw thread is designed to be 10 or less, and the thread length is designed to be equal to the outer diameter D of the screw ring.
- the gist is that the flight pitch is designed to have a length in the range of 300%.
- the outer diameter of the feed portion for introducing the resin material into the plasticizing cylinder is determined by the outer diameter of the mailing portion for keeping the extrusion amount of the resin material constant, and the resin material And the channel depth of the feed portion formed by the screw fly is designed to be larger than the channel depth of the compression portion. It is desirable.
- the fly pitch of the feed section for introducing the resin material into the plasticizing cylinder is larger than the fly pitch of the metering section for keeping the resin material extruded at a constant amount. It is desirable that it be designed to be smaller than the outer diameter of the part, and that the fly pitch of the compression part, which plasticizes the resin material, gradually decrease from the feed part to the metering part. More preferably, as set forth in claim 4, the fly pitch of the feed section for introducing the resin material into the plasticizing cylinder is such that the amount of the resin material extruded is one. It is desirable that it be designed to be larger than 1.5 times the flight pitch of the metering section to be kept constant.
- a plasticizing screw according to any one of the first to fourth aspects is disposed inside a plasticizing cylinder for plasticizing a resin material.
- a torpedo plate On the downstream side of the flow of the resin material, a torpedo plate, which is located at the center of the flow path of the resin material and supports the torpedo, is detachably provided, and the resin material in the plasticizing cylinder is The gist of the present invention is that it is configured to flow around the torpedo on the torpedo plate.
- the thread length of the screw is a screw having the same outer diameter
- L / D is designed to be in the range of 20 to 24, and the outer diameter D of the screw in the metering portion. If the flight pitch is designed to be 30 to 300% of the thread length of a screw designed to have the same flight pitch dimensions (the screw designed in this way is hereinafter referred to as a screw of a square bite). Even if L / D is 10 or less, a long thread length can be secured.
- the distance over which the resin material is cut in the plasticizing cylinder increases, and if the screw rotation speed is the same as before, the time the resin material stays in the plasticizing cylinder , The heating time also increases. For this reason, plasticization of the resin material is promoted.
- the discharge amount decreases at the same rotation speed as before, if the rotation speed is increased to maintain the discharge amount, the shearing force applied to the resin material increases and plasticization is promoted.
- the plasticized state of the resin material can be stabilized without extremely increasing the outer diameter D of the screw, and the plasticized state of the resin material can be stabilized and the injection molding machine or the extrusion molding machine can be reduced in size. Can be compatible.
- a feed for supplying a resin material as in the invention according to claim 2 If the outer diameter of the section is made larger than the outer diameter of the ring section for measuring the resin material, the channel depth of the feed section can be made deeper. For this reason, even if the fly pitch of the feed portion cannot be made sufficiently large compared to the pellet size of the resin material, a sufficient amount of the resin material is supplied.
- the compression section since the outer diameter of the screw gradually decreases, the resin material is also subjected to compression due to a decrease in the spatial volume of the screw thread. For this reason, even if the screw is short, the resin material is quickly plasticized, and the plasticized state of the resin material can be stabilized.
- the fly pitch of the feed portion is formed to be larger than the fly pitch of the mailing portion as in the invention of claim 3, a sufficient supply amount of the resin material into the plasticizing cylinder in the feed portion is provided. And the resin material can be supplied stably.
- the shallower channel depth in the compression section causes compression of the resin material, and also compression due to the gradual decrease of the flight pitch. It is plasticized and can stabilize the plasticized state of the resin material.
- the fly pitch of the feed portion is at least 1.5 times the fly pitch of the main ring portion and is equal to or less than the screw outer diameter of the metering portion, the fiber pitch is reduced.
- the thread length of the screw can be secured to stabilize the plasticized state while stabilizing the supply of the resin material in the threaded portion.
- a configuration is provided in which a tip blade provided with a tip is disposed near a screw tip of a plasticizing cylinder, and a plasticizing mechanism using a combination of the screw is provided.
- This makes it possible to further stabilize the plasticized state of the discharged resin material without complicating the screw structure and screw drive mechanism and increasing the size of the injection molding machine. Can.
- the torpedo blade replaceable the resin material can be injected under optimum conditions. For this reason, it is not necessary to prepare a different screw for each resin material, and the cost of equipment can be reduced.
- FIG. 1 is an external plan view showing the structure of a screw according to a first embodiment of the present invention
- FIG. 1 (a) is designed such that the outer diameter D of the screw is 22 mm and the flight pitch is 11 mm.
- (B) is designed with a screw outer diameter D of 22 mm and a flight pitch of 8 mm
- (c) is designed with a screw outer diameter D of 22 mm and a flight pitch of 22 mm. It is a thing.
- FIG. 2 is a plan view schematically showing a structure of a screw according to a second embodiment and a state in which the screw is disposed in a plasticizing cylinder. Largely formed ones, and (b) shows small ones.
- FIG. 3 (a) is an external plan view showing the structure of the screw according to the second embodiment
- FIG. 3 (b) is a conventional example for comparison.
- Fig. 4 (a) is an external perspective view showing a disassembled state of the plasticizing cylinder in which the plasticizing mechanism of the resin material according to the present invention is incorporated, and Fig. 4 (b) is inserted into the plasticizing cylinder. It is a front view of a torpedo plate.
- FIG. 5 is a sectional view showing the structure of a plasticizing cylinder in which the plasticizing mechanism of the resin material is incorporated.
- the type of resin material to which the screw according to the present invention is applied is limited. Although not particularly limited, it can be suitably applied particularly to polybutylene terephthalate (PBT) resin, polypropylene (PP) resin, general thermoplastic elastomer materials, and the like.
- PBT polybutylene terephthalate
- PP polypropylene
- the pellets can be of any size and shape commonly distributed. For example, ⁇ 3 mm X 2 mm.
- the screw outer diameter is preferably about 90 mm or less for use on a general office desk, and the screw outer diameter is about 60 mm or less for application to a small plasticizing device. Is more preferable. Therefore, the screw made of the resin material according to the present invention is suitably applied to those having an outer diameter of about 100 mm or less, particularly about 90 mm or less so that it can be used for such applications.
- L / D which is obtained by dividing the effective length L of the screw by the outer diameter D of the screw, is 10 or less (for example, LZD is 5 or 10) and the thread length is the same outer diameter
- the flight pitch is designed to be about 0 to 150% (hereinafter, this range may be referred to as “preferable range”). With this design, it is possible to maintain both the favorable plasticized state of the resin material and the downsizing of the injection molding machine by downsizing the screw.
- the discharge amount per rotation decreases, and the residence time of the resin material becomes about 70 to 700%, which is the same as before.
- -It can be retained for a longer time than before.
- the rapid plasticization of resin material in the plasticized cylinder is mainly caused by the heat generated by shearing of the resin raw material.
- the plasticization is not as rapid as the shear heat, the heat applied to the plasticizing cylinder makes the plastic material available. Plasticization occurs.
- the resin material is plasticized by the heat generated by shearing and the heat applied to the plasticizing cylinder, so that semi-molten resin and unmelted resin do not remain. It is plasticized and the plasticized state becomes stable.
- the overall length of the screw can be reduced while maintaining a good plasticized state of the resin material, and it is not necessary to make the screw outer diameter extremely large. Therefore, the size of the injection molding machine or the extrusion molding machine can be reduced by reducing the size and length of the screw. In this way, it is possible to achieve both stabilization of the plasticized state of the resin material to be discharged and downsizing of the injection molding machine or the extrusion molding machine.
- Table 1 shows the calculation results of the thread length and flight pitch of a screw with a LZD of 5 and 10 and a screw outer diameter D of 22 mm for the screw of the first embodiment of the present invention.
- 2 is a table showing a comparison with the screw length of a square pitch of 20 squares and an evaluation of the plasticized state of the resin material when each screw is used. ⁇ table 1 ⁇
- the evaluation was performed for each of polybutylene terephthalate resin and polypropylene resin.
- the pellet used was 03mm x 2mm. No filler was used.
- the screw rotation speed was in the range of 150-360 rotations per minute.
- the plasticizing cylinder is heated by heat. The heating temperature was set at 300 to 360 ° C for polybutylene terephthalate resin and 200 to 280 ° C for polypropylene resin.
- the screw with the top L / D of 20, the outer diameter of 22 mm and the pitch of 22 mm is a screw of the conventional design and is described for comparison.
- the thread length is 50% of the thread length of a screw with L / D of 20.
- the fly pitch is designed to be 11 mm
- the thread length will be 92% of the thread length of a screw with an L / D of 20.
- the flight pitch is designed to be 8 mm
- the thread length will be 125% of the thread length of a screw with an L / D of 20.
- the flight pitch is designed to be 5 mm
- the thread length will be 220% of the thread length of a screw with an L / D of 2 °.
- the thread length is adjusted to a range of 30 to 300%, which is a "preferred range”.
- a screw designed with a fly pitch of 11 mm or 8 mm the resin material was completely plasticized, and there was no problem in injection molding.
- These screws have a "preferred range” thread length, i.e., an LZD in the range of 60-150% of the thread length of a screw with 20.
- the resin material was plasticized by using screws designed to have a flight pitch of 22 mm or 5 mm. These screws have a thread length in the range of 30 to 300% of the thread length of a screw with an L / D of 20 (i.e., a "preferred range”). It is out of place.
- the thread length will be 45.9% of the thread length of a screw with an LZD of 20. If the flight pitch is designed to be 8 mm, the thread length will be 62% of the thread length of a screw with an L / D of 20. If the flight pitch is designed to be 5 mm, the thread length will be 98% of the thread length of the screw with L / D of 20.c If the flight pitch is designed in this way, the thread length will be It is adjusted within the range of “preferred range”. On the other hand, if the flight pitch is designed to be 22 mm, the thread length will be 25% of the thread length of a screw with an L / D of 20, which is outside the “preferred range”.
- the plasticized state of the resin material is designed with a fly pitch of 8 mm and 5 mm In any case, the resin material was completely plasticized, and there was no problem in injection molding. These screws have a thread length in the above “more preferable range”.
- the resin material was plasticized when a screw with a fly pitch of 11 mm was used. These screws have a thread length in the above “preferred range”, but are out of the “more preferable range”.
- a screw with a fly pitch of 22 mm was used, the plasticity of the resin material was poor, and the resin material that was not completely plasticized was mixed. This screw has a thread length outside the “preferred range”.
- the flight pitch is designed to be 5 mm, 8 mm, 11 mm, or 22 mm in a screw with an L / D force of s10. It may be something. However, in order to achieve a “preferable range”, it is preferable that the flight pitch is designed to be 8 mm or 11 mm. On the other hand, for a screw having an L / D of 5, the flight pitch is preferably designed to be 5 mm, 8 mm, or 11 mm in order to obtain a “preferred range”. Then, in order to set the “preferable range”, it is preferable that the flight pitch is designed to be 5 mm or 8 mm.
- FIGS. 1 (a), 1 (b) and 1 (c) are plan views of the external appearance showing the structure of a screw designed to have an L / D of 10 among the examples shown in Table 1.
- screw 1a shown in Fig. 1 (a) has a flight pitch of 11 mm and a thread length of 92% of the thread length of a square pitch screw that is designed to have an L / D of 20.
- Fly Topitchi is at 8 mm, thread length, c such that L / D has a Sukuriyu thread length 125% of the length of the 20 square pin Dzuchi
- the thread lengths of these screws la and lb are It is within the above “more preferred range”.
- this screw 1c is an example in which the thread length is not in the above “preferred range” but in the force “more preferable range”.
- the “preferred range” of the screw thread length according to the present embodiment is 30 to 300% of the thread length of a square pitch screw having the same diameter and an L / D of 20 or 24. It is. However, the preferable range of the thread length also varies depending on the amount of the resin material filler. Further, in order to further stabilize the plasticized state of the resin material, a structure that promotes plasticization of various known resin materials may be added or used in combination. For example, it is possible to form a barrier-flight / sub-flight in a screw, to provide a damage or a shearment, or to increase the number of threads.
- the applicable resin material is not limited to the polybutylene terephthalate resin and the polypropylene resin, but may be any resin material that can be plasticized in the above temperature range. Examples include nylon, aromatic nylon, and syndoxypolystyrene (SPS) resin.
- SPS syndoxypolystyrene
- FIGS. 2A and 2B are cross-sectional views schematically showing a specific shape of the screw according to the present embodiment and a state in which the screw is provided in a plasticizing cylinder.
- the plasticized cylinder is cut away, but the screw is an external view.
- Fig. 2 shows the outer diameter and valley diameter of the screw
- the root diameter is the diameter obtained by subtracting the channel depth from the outer diameter of the screw.
- the screw is drawn in the radial direction of the screw, which is different from the actual shape.
- the screws 50a and 50b shown in Fig. 2 (a) and (b) have outer diameters of the feed sections 51a and 51b larger than the outer diameters of the metering sections 53a and 53b. It is formed.
- the valley diameter of the feed part 51a is larger than the valley diameter of the main ring part 53a ⁇ valley diameter of the compression part 52a. It is formed.
- the valley diameter of the feed section 51b is formed smaller than the valley diameter of the metering section 53b ⁇ the valley diameter of the compression section 52b. Is done.
- the shape of the inner wall surface of the plasticizing cylinder 55 is formed according to the outer diameter of each part of the screw.
- the feed portion 51a is formed in a columnar shape having a uniform outer diameter and a smaller root diameter. Both the outer diameter and the valley diameter of the portion 59a near the feed portion 51a of the compression portion 52a decrease from the feed portion 51a toward the male ring portion 53a. The amount of decrease in the outer diameter is greater than the amount of decrease in the valley diameter, and the channel depth gradually becomes shallower toward the ring portion 53a.
- the portion 58a of the compression section 52a near the metering section 53a has a uniform outer diameter and is formed in a columnar shape, but the valley diameter increases toward the metering section 53a. Increase. Therefore, the channel depth of the compression section 52a gradually decreases toward the metering section 53a.
- the metering portion 53a is formed in a cylindrical shape having a constant outer diameter and valley diameter.
- the root diameter of the feed part 51b is formed smaller than the root diameter of the female ring part 53b.
- the valley diameters of the feed section 5 1 b and the ring section 5 3 b are constant and circular at each part. It is formed in a pillar shape.
- the valley diameter of the portion 59b near the feed portion 51b of the compression portion 52b is formed in a columnar shape with the same diameter as the feed portion 51b.
- the valley diameter of the metering section 5 2 b of the compression section 5 2 b 5 3 b is tapered from the section 5 9 b of the feed section 5 1 b to the metering section 5 3 b. Increase gradually.
- the outer diameters of the feed portion 51b and the metering portion 53b are formed in a cylindrical shape having a constant diameter in each portion.
- the outer diameter of the feed portion 51b is formed to be larger than the outer diameter of the metering portion 53b.
- the outer diameter of the portion 59b near the feed portion 51b of the compression portion 52b gradually decreases from the feed portion 51b to the male ring portion 53b.
- the outer diameter of the portion 58b of the compression portion 52b near the metering portion 53b is constant, and is formed to be equal to the outer diameter of the metering portion 53b.
- the feed section 5 A sufficient supply of the resin material in 1a and 51b can be secured.
- the channel depth of the compression sections 5'2a and 52b is formed to be shallower from the feed sections 51a and 51b toward the metering sections 53a and 53b. Then, compression is applied to the resin material to promote plasticization. Therefore, both shortening of the screw and stabilization of the discharge state of the resin material can be achieved.
- the feed pitch of the feed portion is formed large in order to stabilize the supply amount of the resin material in the feed portion.
- the compression is applied to the resin material by gradually decreasing the fly pitch of the compression section toward the metering section. So even if it ’s short, The resin material can be quickly plasticized.
- the thread length of the screw is designed to be the same as in the first embodiment.
- FIG. 3A is an external plan view showing the structure of the screw according to the third embodiment.
- the screw 30 shown in FIG. 3 (a) is designed to have an L / D of 5.
- the screw 502 shown in FIG. 3 (b) is a comparative example. In the screw 5 ° 2 shown in FIG. 3 (b), the flight bite is formed uniformly over the entire effective length of the screw.
- the screw 30 of the present embodiment has an outer diameter that is constant over the entire effective length and is formed in a columnar shape.
- the valley diameter of the feed portion 31 and the valley diameter of the female ring portion 33 are constant and substantially columnar at each portion. However, the valley diameter of the metering part 33 is formed larger than the valley diameter of the feed part 31.
- the valley diameter of the compression section 32 is equal to the valley diameter of the feed section 31 at the end of the feed section 31, and the valley diameter of the metering section 33 is equal to the valley diameter of the feed section 31. Equal to the diameter.
- the valley diameter of the compression section 32 gradually increases from the end on the feed section 31 side toward the end on the metering section 33 side.
- the feed unit 3 1 fly Topitchi P f is designed to fly Topitchi P m value greater than the metering section 3 3.
- the fly pitch P f of the feed section 31 be designed to be at least 1.5 times the fly pitch P m of the metering section and within the dimension of the outer diameter D of the metering section.
- the fly pitch of the compression section 32 gradually decreases from the end of the feed section 31 to the end of the metering section 33, and is smooth with the screw flights of the feed section 31 and the metering section 33. Connect to.
- the metering part 33 In order to smoothly connect the screw flight at the boundary between the main ring part 33 and the compression part 32, the metering part 33 Even within the range, it may be necessary to form a portion where the flight pitch decreases toward the tip end of the screw. Therefore, the flight pitch of the metering section 33 is not constant, but it is desirable that the flight pitch is constant at least for 4 pitches, more preferably for 6 pitches from the tip of the mailing section 33. With such a design, the plasticized resin material can be stably discharged.
- each screw having the above-described configuration the length of the screw can be reduced while stabilizing the plasticized state of the resin material.
- plasticization of the resin material may be difficult due to the reason that many fillers are added to the resin material.
- the thread length of the screw is designed to be within the above preferred range, the fly pitch of the feed portion may be too small. obtain. In this case, it may be difficult to secure the supply amount of the resin material. In addition, it may be difficult to set the thread length to the above “preferred range”.
- various known structures for promoting plasticization of the resin material can be added.
- Examples of such configurations include forming a non-flying sub-flight, providing a damaging element, or increasing the number of threads.
- the plasticizing mechanism of the resin material according to the present invention is applied in addition to or instead of these configurations.
- a top plate that promotes plasticization of the resin material is disposed in front of the screw of the plasticizing cylinder, that is, downstream of the flow of the plasticized resin material.
- FIG. 4 (a) is an external perspective view showing a state in which one end of a plasticizing cylinder in which the plasticizing mechanism of the present invention is incorporated is disassembled. As shown in FIG. 4 (a), at one end of the plasticizing cylinder 10, a cylinder head 11 and a speed blade 13 on which a speed 12 is disposed, and a spacer 1 4 are stacked and fixed.
- the torpedo plate 13 has a configuration in which a through hole is formed substantially at the center of a disk-shaped member, and a substantially spindle-shaped torpedo 12 is disposed inside the through hole.
- FIG. 4B is an external plan view of the top plate 13.
- the torpedo 12 is supported by at least one or more fins (supporting pieces) 16.
- FIG. 4 (b) shows an example of a configuration supported by four fins.
- a route 17 of the molten resin is formed in a gap between the outer peripheral surface of the top 12 and the inner peripheral surface of the through hole.
- Spacer 1 4 is a member of the same disk-shaped toe Bee bleed rate 1 3, in its substantially central, path 1 9 of the resin material is a through-hole is formed.
- the inner diameter of the path 19 of the resin material is desirably substantially the same as the diameter of the through-hole formed in the top blade 13 in order to achieve a smooth flow of the plasticized resin material.
- a recess 20 is formed in the cylinder head 11 substantially at the center of the surface to be joined to the torpedo plate 13 so as not to interfere with the torpedo 12.
- a resin material path 21 which is a through-hole smaller in diameter than the resin material path 19 of the torpedo plate 13 spacer 14, is formed. In this way, a through hole having a funnel-shaped cross section is formed at the center of the cylinder head 11 as a whole.
- the spacer 14 the torpedo plate 13, and the cylinder head 11 are stacked and mounted in this order, and formed on each member.
- the bolt is fixed to one end of the plasticizing cylinder 10 via bolt holes 25, 25,
- FIG. 5 is a cross-sectional view showing a state where the plasticizing mechanism of the resin material according to the present invention is assembled.
- the screws l a and lb and the torpedo 12 are not cross-sections but are appearances.
- the portion protruding from the disk surface of the torpedo plate 13 of the tip 12 is housed so as not to contact the concave portion 20 of the cylinder head 11 with a predetermined gap.
- the portions of the speed 12 that protrude from the screws 1a and 1b are fixed by spacers 14 to positions that do not interfere with the screws 1a and 1b.
- a heater 101 for heating the resin material may be provided on the outer peripheral surface of the plasticizing cylinder 10.
- the plasticized resin material sent out from the plasticizing cylinder 10 passes through the resin material path 17 of the torpedo plate 13 and the outer peripheral surface of the torpedo 12 and the cylinder head 11. It flows through the gap between the recess 20 and the inner peripheral surface. Then, it is sent from the resin material path 21 of the cylinder head 11 to a nozzle (not shown) or the like (not shown) mounted on the cylinder head 11 and discharged.
- the thickness of the torpedo plate 13 The length may be longer than the length of the tip 12 so that the tip 12 and the screws 1 a and 1 b do not interfere with each other without using the spacer 14.
- a screen member for example, a mesh-shaped plate such as a stainless steel wire mesh
- a torpedo plate A configuration may be adopted in which a breaker plate is inserted before or after 13 to hold the screen member.
- a torpedo having a torpedo formed in a plasticizing cylinder is used. If the plate is configured to be attached and the torpedo plate is used to improve the plasticized state of the resin material, the screw drive mechanism does not become complicated or large. For this reason, it is possible to further stabilize the plasticized state of the resin material while keeping the size of the injection molding machine or the extrusion molding machine small.
- the shape and shape of the torpedo 12 and the flow path area such as the gap between the through-hole, the surface treatment of the plate, and the number and shape of the fins (supporting pieces) 16 that support the torpedo 12 are discharged. It depends on the resin. Therefore, it is desirable to prepare a plurality of types of top plate according to the type of resin material in advance so that they can be replaced.
- the replacement of the torpedo plate 13 can be performed simply by attaching and detaching the bolt 15 from the outside of the plasticizing cylinder 10, and can be performed more easily than the replacement of the screw. For this reason, adjustment to obtain the optimal plasticized state for each resin material (that is, replacement of the top plate) can be performed in a short time, and the adjustment work of the injection molding machine or the extrusion molding machine is made more efficient. Can be planned.
- members such as torpedo plates are generally less expensive than screws. For this reason, tope Even if a metal plate is prepared, the equipment cost can be kept lower than when different screws are prepared for each type of resin material.
- it may be a force which shows a structure for inserting the one torpedo plate of s, a plurality of toe Phi bleed rate configured to ⁇ in FIG.
- the fins when a plurality of torpedo blades having different positions and numbers of fins supporting the torpedo are used in combination, the fins have a function like a state mixer.
- effects other than uniform plasticization of the molten resin can be obtained.
- the tip speed plate is mounted between the nozzle and the plasticizing cylinder.
- the The plate may be mounted between the plasticizing cylinder and the crosshead.
- applicable resin materials are not limited to polybutylene terephthalate, polypropylene, and general thermoplastic elastomers described in the examples.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200411001758 DE112004001758T8 (de) | 2003-09-22 | 2004-09-22 | Schnecke zum Plastifizieren von Kunststoffmaterial und ein Plastifizierungsmechanismus |
US10/572,682 US20070104021A1 (en) | 2003-09-22 | 2004-09-22 | Screw for plastication of resin material and a plasticizing mechanism |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003329887 | 2003-09-22 | ||
JP2003-329887 | 2003-09-22 | ||
JP2004269857A JP2005119277A (ja) | 2003-09-22 | 2004-09-16 | 樹脂材料の可塑化用スクリュー及び可塑化機構 |
JP2004-269857 | 2004-09-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005028184A1 true WO2005028184A1 (ja) | 2005-03-31 |
Family
ID=34380345
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/014318 WO2005028184A1 (ja) | 2003-09-22 | 2004-09-22 | 樹脂材料の可塑化用スクリュー及び可塑化機構 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20070104021A1 (ja) |
JP (1) | JP2005119277A (ja) |
DE (1) | DE112004001758T8 (ja) |
WO (1) | WO2005028184A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20210316492A1 (en) * | 2014-10-27 | 2021-10-14 | Shibaura Machine Co., Ltd. | Screw for extruder comprising a passage crossing over between adjacent cylindrical bodies |
US20210354362A1 (en) * | 2014-05-08 | 2021-11-18 | Shibaura Machine Co., Ltd. | Extruder screw having paths within the screw, extruder, and extrusion method |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4842046B2 (ja) * | 2006-08-11 | 2011-12-21 | 愛三工業株式会社 | 射出成形機の可塑化装置及び可塑化方法 |
US7792059B2 (en) * | 2007-09-04 | 2010-09-07 | Motorola, Inc. | Method and system for transitioning between a distributed ad hoc network architecture and a cluster ad hoc network architecture |
EP2454078B1 (de) * | 2009-07-16 | 2016-04-27 | Blach Verwaltungs GmbH & Co. KG | Extruder |
JP5745689B2 (ja) * | 2012-04-23 | 2015-07-08 | 淺田鉄工株式会社 | 分散・粉砕機 |
CN105751459B (zh) * | 2016-04-25 | 2017-11-21 | 顺德职业技术学院 | 带球形转子的注射成型装置 |
FI129682B (en) * | 2016-08-26 | 2022-06-30 | Teknologian Tutkimuskeskus Vtt Oy | Single screw extruder and method |
EP3558629B1 (de) * | 2016-12-21 | 2023-11-15 | Basf Se | Einwellenextruder und verwendung eines einwellenextruders sowie verfahren zum ändern einer morphologie eines superabsorbierenden polymergels mit einem einwellenextruder |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61244507A (ja) * | 1985-04-22 | 1986-10-30 | Mitsubishi Heavy Ind Ltd | 可塑化装置 |
JPH0459326A (ja) * | 1990-06-29 | 1992-02-26 | Ube Ind Ltd | 高混練スクリュ |
JPH09104056A (ja) * | 1995-10-12 | 1997-04-22 | Niigata Eng Co Ltd | プラスチック加工用スクリュ |
JPH10146871A (ja) * | 1996-11-20 | 1998-06-02 | Tsuoisu Kk | 可塑化混練装置 |
JPH11198164A (ja) * | 1998-01-07 | 1999-07-27 | Misawa Homes Co Ltd | 射出成形品及びその製造方法 |
JP2000068416A (ja) * | 1998-08-20 | 2000-03-03 | Sumitomo Bakelite Co Ltd | 半導体封止成形方法及び装置 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2505125A (en) * | 1945-08-20 | 1950-04-25 | List Heinz | Continuously operating kneader and mixer |
US3795386A (en) * | 1971-08-16 | 1974-03-05 | Monsanto Co | Shaft seal for low and high pressures |
CA1074780A (en) * | 1976-07-14 | 1980-04-01 | Frenkel C-D Aktiengesellschaft | Opposite handed variable groove threaded screw and barrel transfer mixer |
US4065108A (en) * | 1976-11-11 | 1977-12-27 | Package Machinery Company | Non-return valve for mottle charge in plastic injection molding machine |
US4310484A (en) * | 1980-08-01 | 1982-01-12 | Union Carbide Corporation | Method for extruding molten narrow molecular weight distribution, linear, ethylene copolymers |
JP3170757B2 (ja) * | 1990-08-31 | 2001-05-28 | 東芝機械株式会社 | バリヤスクリュ |
US5156790A (en) * | 1991-07-25 | 1992-10-20 | Union Carbide Chemicals & Plastics Technology Corporation | Method for extruding ethylene polymers |
US5662415A (en) * | 1996-01-19 | 1997-09-02 | Gisco Technology | Conveyor for degassing of mixtures for solid surface products and method of use |
JP3755293B2 (ja) * | 1997-05-22 | 2006-03-15 | 日立金属株式会社 | 繊維強化熱可塑性樹脂の可塑化装置用スクリュおよび可塑化装置 |
-
2004
- 2004-09-16 JP JP2004269857A patent/JP2005119277A/ja active Pending
- 2004-09-22 DE DE200411001758 patent/DE112004001758T8/de active Active
- 2004-09-22 US US10/572,682 patent/US20070104021A1/en not_active Abandoned
- 2004-09-22 WO PCT/JP2004/014318 patent/WO2005028184A1/ja active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61244507A (ja) * | 1985-04-22 | 1986-10-30 | Mitsubishi Heavy Ind Ltd | 可塑化装置 |
JPH0459326A (ja) * | 1990-06-29 | 1992-02-26 | Ube Ind Ltd | 高混練スクリュ |
JPH09104056A (ja) * | 1995-10-12 | 1997-04-22 | Niigata Eng Co Ltd | プラスチック加工用スクリュ |
JPH10146871A (ja) * | 1996-11-20 | 1998-06-02 | Tsuoisu Kk | 可塑化混練装置 |
JPH11198164A (ja) * | 1998-01-07 | 1999-07-27 | Misawa Homes Co Ltd | 射出成形品及びその製造方法 |
JP2000068416A (ja) * | 1998-08-20 | 2000-03-03 | Sumitomo Bakelite Co Ltd | 半導体封止成形方法及び装置 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20210354362A1 (en) * | 2014-05-08 | 2021-11-18 | Shibaura Machine Co., Ltd. | Extruder screw having paths within the screw, extruder, and extrusion method |
US11813785B2 (en) * | 2014-05-08 | 2023-11-14 | Shibaura Machine Co., Ltd. | Extruder screw having paths within the screw, extruder, and extrusion method |
US20210316492A1 (en) * | 2014-10-27 | 2021-10-14 | Shibaura Machine Co., Ltd. | Screw for extruder comprising a passage crossing over between adjacent cylindrical bodies |
US11820062B2 (en) * | 2014-10-27 | 2023-11-21 | Shibaura Machine Co., Ltd. | Extrusion methods wherein material is guided through a passage crossing over between adjacent cylindrical bodies |
Also Published As
Publication number | Publication date |
---|---|
DE112004001758T8 (de) | 2008-04-24 |
JP2005119277A (ja) | 2005-05-12 |
DE112004001758T5 (de) | 2008-01-24 |
US20070104021A1 (en) | 2007-05-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20170291364A1 (en) | Single screw micro-extruder for 3d printing | |
US9688001B2 (en) | Method of manufacturing transparent resin composition | |
CN107530941B (zh) | 挤出机用螺杆、挤出机以及挤出方法 | |
JP2007001122A (ja) | 植物性原料の可塑化装置 | |
WO2005028184A1 (ja) | 樹脂材料の可塑化用スクリュー及び可塑化機構 | |
JP5507939B2 (ja) | 押出成形装置 | |
JP2016043623A (ja) | 射出成形機のスクリュ | |
JP6494689B2 (ja) | 繊維強化熱可塑性樹脂押出物の製造方法および製造装置 | |
JP4635620B2 (ja) | 溶融紡糸装置およびそれを用いた溶融紡糸方法 | |
JP2005169764A (ja) | プラスチック材料の混練装置 | |
KR102231964B1 (ko) | 수지 고추력 단축스크류 어셈블리 | |
JP7267386B1 (ja) | 発泡成形体製造装置及び発泡成形体製造装置用スクリュ | |
KR101015353B1 (ko) | 다단의 회전믹서를 구비한 믹싱 스크류 | |
JP4254585B2 (ja) | 射出成形用スクリュ | |
JP4254626B2 (ja) | 射出成形機の射出装置および発泡射出成形方法 | |
JPH07186233A (ja) | コールドフィード押出機 | |
JPH05228920A (ja) | スクリュー式混練機 | |
JP7257235B2 (ja) | 射出成形方法と、その方法を使用する射出成形機、及び、それらに用いられる射出成形用スクリュー | |
JP5397599B2 (ja) | 射出成形機の射出装置 | |
JPH10109350A (ja) | 溶融樹脂の押出機 | |
JP2000025093A (ja) | 押出機用スクリュ | |
KR200317983Y1 (ko) | 위성볼을 이용한 합성수지 압출장치 | |
JP5383092B2 (ja) | スクリュー及び成形品製造方法 | |
JP2014000690A (ja) | 射出装置 | |
JPH10113962A (ja) | 射出成形機用スクリュ |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200480027349.9 Country of ref document: CN |
|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BW BY BZ CA CH CN CO CR CU CZ DK DM DZ EC EE EG ES FI GB GD GE GM HR HU ID IL IN IS KE KG KP KR LC LK LR LS LT LU LV MA MD MG MN MW MX MZ NA NI NO NZ OM PG PL PT RO RU SC SD SE SG SK SL SY TM TN TR TT TZ UA UG US UZ VC YU ZA ZM |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SZ TZ UG ZM ZW AM AZ BY KG MD RU TJ TM AT BE BG CH CY DE DK EE ES FI FR GB GR HU IE IT MC NL PL PT RO SE SI SK TR BF CF CG CI CM GA GN GQ GW ML MR SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1120040017580 Country of ref document: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2007104021 Country of ref document: US Ref document number: 10572682 Country of ref document: US |
|
122 | Ep: pct application non-entry in european phase | ||
WWP | Wipo information: published in national office |
Ref document number: 10572682 Country of ref document: US |
|
RET | De translation (de og part 6b) |
Ref document number: 112004001758 Country of ref document: DE Date of ref document: 20080124 Kind code of ref document: P |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8607 |