CN201792462U - Injection machine screw rod with reversely-connected screw rod head - Google Patents
Injection machine screw rod with reversely-connected screw rod head Download PDFInfo
- Publication number
- CN201792462U CN201792462U CN2010205488019U CN201020548801U CN201792462U CN 201792462 U CN201792462 U CN 201792462U CN 2010205488019 U CN2010205488019 U CN 2010205488019U CN 201020548801 U CN201020548801 U CN 201020548801U CN 201792462 U CN201792462 U CN 201792462U
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- Prior art keywords
- screw
- screw rod
- thrust ring
- ring
- rod head
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- Expired - Fee Related
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Abstract
The utility model relates to an injection machine screw rod with a reversely-connected screw rod head. The screw rod mainly comprises a screw rod body, a thrust ring, a check ring and the screw rod head, wherein a section of smooth small-diameter column and a section of screw stud are connected at the front end of the screw rod body in sequence; and the screw stud is matched with an internal threaded hole on the screw rod head to connect the screw stud and the screw rod head, so as to achieve higher straightness and coaxiality. The smooth small-diameter column is sleeved by the thrust ring; the front end surface and the rear end surface of the thrust ring are respectively in joint with the rear end surface of the screw rod head and the front end surface of the screw rod; the thrust ring is fixed in the axial direction when the screw stud at the front end of the screw rod is screwed into the internal threaded hole of the screw rod head to a certain depth; and the external diameter of the thrust ring can be different according to different materials and process requirements, so as to generate different back pressures. The ring-shaped check ring is mounted on the column body of the screw rod head between the thrust ring and the screw rod head, and can rotate freely or move back and forth; when the rear side surface of the check ring is in incomplete joint with the front oblique side surface of the thrust ring, plasticized melt in a screw slot is pressed in a storage section through a gap, a gap formed between the column body of the screw rod head and a charging barrel and a screw rod head slot; and when the rear side surface of the check ring is in joint with the front oblique side surface of the thrust ring, the melt in the storage section is prevented from flowing back to the screw slot for sealing, and the screw rod can inject.
Description
Technical field
The utility model relates to the injection screw that uses in a kind of injection machine.
Background technology
Injection screw is one of vital part of injection machine.It rotates in the machine barrel of injection machine, and main effect is exactly with the polymer particle of solid or powder melts plasticizing, stores metering, will store a certain amount of melt again into and inject mould, ejects after the mold cools down, obtains plastic products.
The screw rod of band shape non-return screw head is by forming with the lower part in the injection screw: screw head, check ring, thrust ring and screw rod body.Check ring wraps on the screw head shell portion between screw head and thrust ring; The cylindrical external diameter of check ring internal diameter and screw head has constituted the runner of material, and external diameter then forms sealing with the internal diameter of barrel.During plasticizing, the fused materials in the screw channel is fed forward pushes closed check ring open, opens runner, so that melt is smoothly by entering in the storing section; During injection, screw head travels forward, and check ring is subjected to the effect of material in the storing section and makes reverse movement backward, realizes closing seam up to contacting with the taper surface of thrust ring.
Traditionally, screw head links to each other with screw rod leading portion internal thread hole by the rear end external screw thread.General screw rod is longer, and must have good linearity and just be unlikely to and the barrel direct friction; Process screw channel on the most of length of screw rod, the spiral shell rib of formation is a kind of external screw thread, and screw channel and spiral shell rib have rounding and higher fineness, needs to handle through Precision Machining and grinding.Generally not having the screw thread smooth section with the screw rod front/rear end line of centres and screw rod back segment in these process positions.The internal thread hole of conventional screw front end must with the whole coaxial line of screw rod, could guarantee that screw head non-smoothly friction in barrel rotates and move forward and backward.Actually add man-hour, the requirement of this coaxial line often is not easy to guarantee: the linearity of internal thread hole neutral conductor when boring just has very mistake, and the inner bolt hole that processes will be eccentric.Though screw head and double-screw bolt through after grinding through having quite accurate linearity after grinding, once being connected with inner bolt hole on the screw rod, linearity on the whole just is not easy assurance.It is very high after screw rod is connected with screw head in the finished product crooked ratio to take place.And not straight screw rod will produce bigger wearing and tearing in the higher course of work of temperature, thereby the useful life longevity of injection machine is just lower.
Summary of the invention
In the tradition screw of injection machine, screw head back segment external screw thread is connected with the screw front end internal thread hole, the axiality of itself and screw rod body and linearity are not easy to guarantee, for improving this problem, adopt the method for attachment of screw head internal thread hole and screw front end external thread section, thereby form the novel screw in injection molding machine system of the anti-connection of a kind of screw head.
China's utility model patent 95203759.6 is also mentioned the anti-screw in injection molding machine system that connects of a kind of screw head, screw front end stretches out a double-screw bolt, this double-screw bolt cooperates with internal thread hole on the screw head, two parts are connected, cover one check ring (original text should be revised for " thrust ring ") on the double-screw bolt, groove is made with the dressing ball in the end of check ring and screw rod relative engagement.This invention has three shortcomings fully, and the one, there is not thrust ring between screw head and the screw rod, the screw front end face is a thrust surface, size determines, when because of impacting before and after the check ring and abrasive action requirement screw rod body integral replacing when screw front end is damaged easily.Get final product if increase thrust ring then directly change thrust ring, and change thrust ring external diameter can be regulated back pressure.The 2nd, it is too unexpected that screw front end face/check ring rear end face gap, check ring inner chamber/intersegmental crack of screw rod small column and ball gap form the transition of melt-flow circulation passage, shutoff easily, and melt flows has some setbacks.If keep transition circle shell of column on the general screw head, then can address this problem.If the 3rd, the slide construction of employing screw head end face groove/ball does not strengthen the rotary freedom of column type check ring, and is opposite ball or the unbalanced deflection that then is easy to generate of groove wearing and tearing.Therefore adopt the angled end-face transition, methods such as screw head front end fluting can address this problem.Specify particular content of the present invention below.
Screw in injection molding machine system in the utility model mainly is made up of screw rod, thrust ring, check ring, screw head.
Except that having the screw channel of multistage distribution with traditional screw rod, this new screw body front end has one section smooth path cylinder and one section double-screw bolt successively.This double-screw bolt cooperates with internal thread hole on the screw head, by screw thread two parts is connected.Adding man-hour, this section double-screw bolt can adopt the location benchmark that is installed of screw channel processing, even once is installed and can adds carefully and neatly done root screw rod and double-screw bolt, thereby guarantees that they have higher linearity and axiality.Screw head is shorter, adds man-hour, and the linearity of internal thread hole, with the axiality of maximum cylindrical of screw head and main paragraph, be easy to guarantee with the perpendicularity of the rear end face of location usefulness might as well be revised.Like this, compare with the screw rod in the conventional art, the linearity that screw head is connected with the screw rod body, axiality obviously guarantee easily, can reach very accurate, in the wearing and tearing that fundamentally reduce screw rod and screw head and barrel, use more durable, more accurate.
On the smooth path cylindrical section of this new screw body front end, can overlap a thrust ring, thrust ring front end face, rear end face are fitted with screw head rear end face and screw front end face respectively, thrust ring just is axially fixed when the screw front end double-screw bolt screws in the screw head internal thread hole to certain depth, thrust ring can be selected various outer diameter according to different materials and technological requirement, thereby can produce different back pressures.
The annular check ring is installed on the screw head cylinder between thrust ring and the screw head, can rotate freely, also can move forward and backward, when prism was not exclusively fitted before check ring trailing flank and the thrust ring, the melt of plasticizing was pressed into the storing section by gap and the screw head groove that this gap, screw head cylinder and barrel form in the screw channel; Then stop storing section melt adverse current to seal to screw channel when fitting, screw rod can be injected.
The screw head front end can be taper or cylindrical even threaded bullet, and the guide functions of also can having slotted can also form multiple screw head form further combined with reverse stopping ball, pin or static mixer etc., satisfies different arts demands.
Description of drawings
Structural representation when Fig. 1 injects check ring forward and closes for screw in injection molding machine
Fig. 2 retreats plasticizing, structural representation when the check ring standard-sized sheet is put for screw in injection molding machine
Fig. 3 is the screw rod body structure schematic diagram of screw in injection molding machine
Fig. 4 is the thrust ring structural representation of screw in injection molding machine
Fig. 5 is the screw head structural representation of screw in injection molding machine
Fig. 6 is the check ring structural representation of screw in injection molding machine
The specific embodiment
The utility model screw in injection molding machine mainly consists of the following components: screw head 1, check ring 2, thrust ring 3, screw rod body 4.It is a step surface that screw rod body front end has one section smooth path cylinder 6 and one section double-screw bolt 8,7 successively, and thrust ring and screw rod body are in contact-making surface 5 location.Double-screw bolt external screw thread 8 matches with the screw head inner bolt hole two parts is connected, and can have higher linearity and axiality.
As shown in Figure 1, when screw in injection molding machine is injected material forward.Check ring and thrust ring be in contact-making surface 9 sealing, because material is closed in the storing section in the machine barrel 0, screw rod travels forward, and nozzle 16 is opened, and by runner material is expelled in the mould.
As shown in Figure 2, retreat when carrying out plastifying material when screw in injection molding machine.Under the melt pressure effect, check ring moves forward until contacting at step surface 10 with screw head.Material in screw channel after the plasticizing, through the gap 11 of thrust ring and machine barrel inner chamber, check ring and thrust ring be in the gap of contact-making surface 9, check ring and screw head cylinder gap 12,13 partly, vertical grooving 14 on the screw head enters the procephalic storing section 15 of screw rod then.Along with storing section pressure increases, then promote to move behind the check ring, step surface 10 gaps increase, and check ring and thrust ring constantly reduce in the gap of contact-making surface 9.Because during plastifying material, nozzle is closed, material can not have only when 16 open and just inject through 16 leakages.
Fig. 3 is the screw rod body portion, and front end cylinder part is made up of two parts, is the male thread portion that matches with the screw head internal thread hole foremost, and another part is smooth cylinder part, is placed in thrust ring on the smooth cylinder.
Fig. 4 is the thrust ring part, can select different external diameters with different processing technologys according to different materials, and then can obtain different thrust rings and the gap between the machine barrel.The big front end face step of thrust ring rear end face and screw rod is fitted and is located, and hole end surface is fitted and located in thrust ring front end face and the screw head.
Fig. 5 is the screw head part, and the trunk portion branch of screw head has inner bolt hole, is connected with screw rod body double-screw bolt external screw thread by internal thread, and its big rear end face and thrust ring front end face are fitted and located.At the conical section of screw head, have vertical grooving, fused materials there is guide effect, the flowing space increases.Cylindrical shell of column suit check ring, flange stops that check ring do not cross behind the conehead.
Fig. 6 is non-return loop section, and the annular check ring that is installed on the screw head cylinder can rotate freely, and also can move forward and backward.When prism was not exclusively fitted before check ring trailing flank and the thrust ring, the interior melt of screw channel was pressed into the storing section during plasticizing; When fitting, then stop storing section melt adverse current to seal, can inject to screw channel.
Claims (2)
1. the anti-screw in injection molding machine that connects of screw head mainly contains screw rod body, thrust ring, check ring, screw head composition, it is characterized in that this screw rod body front end has one section smooth path cylinder and one section double-screw bolt successively, this double-screw bolt cooperates with internal thread hole on the screw head, two parts are connected, can have higher linearity and axiality.
2. according to requiring the anti-screw in injection molding machine that connects of 1 described screw head in the right, it is characterized in that: the smooth path cylindrical section of screw rod body front end overlaps a thrust ring, thrust ring front end face, rear end face are fitted with screw head rear end face and screw front end face respectively, thrust ring just is axially fixed when the screw front end double-screw bolt screws in the screw head internal thread hole to certain depth, thrust ring can be selected various outer diameter according to different materials and technological requirement, thereby can produce different back pressures.The annular check ring is installed on the screw head cylinder between thrust ring and the screw head, can rotate freely, and also can move forward and backward, thereby make the melt of plasticizing in the screw channel flow into the storing section or stop storing section melt adverse current to be injected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205488019U CN201792462U (en) | 2010-09-30 | 2010-09-30 | Injection machine screw rod with reversely-connected screw rod head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205488019U CN201792462U (en) | 2010-09-30 | 2010-09-30 | Injection machine screw rod with reversely-connected screw rod head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201792462U true CN201792462U (en) | 2011-04-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205488019U Expired - Fee Related CN201792462U (en) | 2010-09-30 | 2010-09-30 | Injection machine screw rod with reversely-connected screw rod head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201792462U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101973112A (en) * | 2010-09-30 | 2011-02-16 | 北京化工大学 | Threaded rod of injection molding machine with reversely connected threaded rod head |
| CN102922655A (en) * | 2012-11-08 | 2013-02-13 | 柳州市欧科塑胶机械成套设备有限公司 | Injection molding machine for unsaturated polyester bulk molding compound |
| CN103921414A (en) * | 2014-03-22 | 2014-07-16 | 肖加云 | Combined type screw head |
-
2010
- 2010-09-30 CN CN2010205488019U patent/CN201792462U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101973112A (en) * | 2010-09-30 | 2011-02-16 | 北京化工大学 | Threaded rod of injection molding machine with reversely connected threaded rod head |
| CN102922655A (en) * | 2012-11-08 | 2013-02-13 | 柳州市欧科塑胶机械成套设备有限公司 | Injection molding machine for unsaturated polyester bulk molding compound |
| CN102922655B (en) * | 2012-11-08 | 2015-04-29 | 广西柳州中嘉知识产权服务有限公司 | Injection molding machine for unsaturated polyester bulk molding compound |
| CN103921414A (en) * | 2014-03-22 | 2014-07-16 | 肖加云 | Combined type screw head |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110413 Termination date: 20120930 |