CN217834616U

CN217834616U - Injection molding screw rod with plug pin type structure

Info

Publication number: CN217834616U
Application number: CN202221710986.8U
Authority: CN
Inventors: 夏瑜键; 夏增富
Original assignee: ZHEJIANG HUAYE PLASTIC MACHINERY CO Ltd
Current assignee: ZHEJIANG HUAYE PLASTIC MACHINERY CO Ltd
Priority date: 2022-07-01
Filing date: 2022-07-01
Publication date: 2022-11-18
Anticipated expiration: 2032-07-01

Abstract

The utility model provides a screw rod of moulding plastics of bolt formula structure, including the body of rod and the spiral shell arris of setting on the body of rod, tip at the body of rod is provided with ends contrary structure, it includes activity ring and bolt to end contrary structure, tip at the body of rod is provided with the spacing convex part that can push up mutually with the activity ring and touch, be provided with the water conservancy diversion projection on the terminal surface of spacing convex part, the bolt is pegged graft in the spliced eye of water conservancy diversion projection, activity ring cover is put on the water conservancy diversion projection, the preceding terminal surface of activity ring can push up mutually with the bolt lateral wall and touch, leave the logical material chamber that can pass through the material between the inner wall of activity ring and the outer wall of water conservancy diversion projection. The utility model has the advantages that: the bolt type non-return structure is adopted, the condition that a plurality of parts are in threaded fit is not needed, and the molten plastic can continuously and smoothly flow through the material passing cavity from the material feeding position at the material discharging end through the wear-resistant and corrosion-resistant characteristics of the steel; in addition, the movable ring can move back and forth more accurately after the bolt is fixed, and the precision of the production process is guaranteed.

Description

Injection molding screw rod with plug pin type structure

Technical Field

The utility model relates to a screw rod preparation technical field especially indicates a screw rod of moulding plastics of bolt formula structure.

Background

The prior Chinese utility model patent with the application number of CN201120358600.7 named as 'a special screw check valve for injection molding machine PP material', discloses a special screw check valve for injection molding machine PP material, which is characterized in that: the check valve comprises a check valve body in transmission connection with a screw, a glue passing head fixed at the front end of the check valve body, a check washer arranged at the front part of the check valve body, a check ring arranged between the check washer and the glue passing head and a slot arranged between the check ring and the check valve body; two contact surfaces are arranged between the non-return gasket and the non-return ring, and the contact surfaces are planes or cylindrical surfaces. Owing to adopted above-mentioned technical scheme, this utility model carries out optimal design to check valve subassembly, has increased the spring design, makes the check valve needle can close the check valve rapidly after the melten gel finishes, has guaranteed to penetrate gluey steady, prevents the backward flow of sizing material. However, the check valve body is inconvenient to install, and thus the structure of the screw employing the check valve is still further improved.

Disclosure of Invention

The utility model aims to solve the technical problem that a screw rod of moulding plastics of end contrary structure simple to operate's bolt formula structure is provided to above-mentioned prior art current situation.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: this screw rod of moulding plastics of bolt formula structure, including the body of rod and the spiral shell arris of setting on the body of rod the tip of the body of rod is provided with and ends structure, its characterized in that: the anti-return structure comprises a movable ring and a bolt, wherein a limit convex part which can be abutted against the movable ring is arranged at the end part of the rod body, a flow guide convex column is arranged on the end surface of the limit convex part, the bolt is inserted into an insertion hole of the flow guide convex column, the movable ring is sleeved on the flow guide convex column, the front end surface of the movable ring can be abutted against the side wall of the bolt, and a material passing cavity which can pass through materials is reserved between the inner wall of the movable ring and the outer wall of the flow guide convex column.

As an improvement, a clamping groove which can be inserted into the end part of the movable ring can be preferably arranged on the side wall of the bolt.

In a further improvement, the limiting convex part can be preferably an inverted frustum-shaped bulge with a large diameter close to one end of the diversion convex column and a small diameter far away from the other end of the diversion convex column, the end part of the inverted frustum-shaped bulge is in smooth transition with the surface of the rod body, and diversion grooves are circumferentially distributed on the side wall of the inverted frustum-shaped bulge at intervals.

In a further improvement, the flow guide groove can be a spiral curved groove.

The improved structure is characterized in that a cylinder for mixing and shearing materials can be preferably arranged on the rod body between the flow guide grooves and the screw edges, the outer diameter of the cylinder is the same as the maximum diameter of the inverted-truncated-cone-shaped bulge, and second flow guide grooves are circumferentially distributed on the outer wall of the cylinder at intervals.

In a further refinement, the second flow guide groove may preferably be a groove that coincides with the spiral direction of the curved groove.

In a further refinement, the depth of the second channel may preferably be greater than the depth of the channel.

In a further improvement, the second diversion trench and the bottom surface of the diversion trench may preferably be arc surfaces with semicircular radial cross sections.

As a modification, annular grooves which are axially and continuously arranged at intervals can be preferably arranged on the rod body corresponding to the blanking position.

As an improvement, the top end of the axial section of the screw ridge is small, the root of the axial section of the screw ridge is large, and the included angle between the rear side wall of the screw ridge and the outer surface of the rod body is 120 degrees.

Compared with the prior art, the utility model has the advantages of: the bolt type non-return structure is adopted to replace the traditional three-piece (screw head/non-return ring/gasket) form, the condition that a plurality of parts are in threaded fit is not needed, and the molten plastic can continuously and smoothly flow through the material passing cavity from the feeding position at the discharging end through the wear-resistant and corrosion-resistant characteristics of the steel; in addition, the movable ring can move back and forth more accurately after the bolt is fixed, so that the precision of the production process is ensured; the rod body position close to the discharge end is a metering area, a mixing and shearing structure, namely a cylinder, is added in the metering area, the structure can further shear the plastic melted in the area, the volume of the material when the molten material passes through the discharge end is reduced to a great extent, and the precision control of the movable ring is more accurate; set up the ring channel in unloading department, play two effects, first can prevent that solid plastics from entering into and go backward when the screw rod storage with the part shearing bits after screw rod matched with barrel department effect, make dirty the board of moulding plastics, play certain environmental protection effect, can be with the compressed gas that the plastics in the melting region in the middle part of the body of rod produced along here smoothly by extrusion clearance department on the one hand in addition.

Drawings

Fig. 1 is a perspective view of an embodiment of the present invention;

FIG. 2 is a perspective view of FIG. 1 with the movable ring and latch removed;

FIG. 3 is a cross-sectional view taken along the plane of the central axis in FIG. 1;

FIG. 4 is a front perspective view of FIG. 1;

fig. 5 isbase:Sub>A cross-sectional view taken along linebase:Sub>A-base:Sub>A of fig. 4.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 5, the injection molding screw rod with the bolt-type structure of the embodiment includes a rod body 1 and a screw ridge 10 disposed on the rod body 1, a non-return structure is disposed at an end of the rod body 1, the non-return structure includes a movable ring 2 and a bolt 3, a limiting protrusion 11 capable of contacting with the movable ring 2 is disposed at an end of the rod body 1, a flow guiding protrusion 12 is disposed on an end surface of the limiting protrusion 11, the bolt 3 is inserted into an insertion hole of the flow guiding protrusion 12, the movable ring 2 is sleeved on the flow guiding protrusion 12, a front end surface of the movable ring 2 can contact with a side wall of the bolt 3, and a material passing cavity 15 capable of passing through a material is disposed between an inner wall of the movable ring 2 and an outer wall of the flow guiding protrusion 12. And a clamping groove which can be inserted with the end part of the movable ring 2 is arranged on the side wall of the bolt 3. The rod body 1 corresponding to the blanking position is provided with annular grooves 14 which are axially and continuously arranged at intervals. The top end of the axial section of the screw ridge 10 is small, the root part of the axial section of the screw ridge 10 is large, and the included angle a between the rear side wall of the screw ridge 10 and the outer surface of the rod body 1 is 120 degrees.

The limiting convex part 11 is an inverted circular truncated cone-shaped bulge which is close to one end of the flow guide convex column 12 and is large and far away from one end of the flow guide convex column 12, the diameter of the end of the inverted circular truncated cone-shaped bulge is small, the end part of the inverted circular truncated cone-shaped bulge is in smooth transition with the surface of the rod body 1, and flow guide grooves are distributed on the side wall of the inverted circular truncated cone-shaped bulge at intervals. The diversion trench is a spiral curved trench.

A cylinder 13 for mixing and shearing materials is arranged on the rod body 1 between the flow guide grooves and the spiral ridge 10, the outer diameter of the cylinder 13 is the same as the maximum diameter of the inverted truncated cone-shaped bulge, and second flow guide grooves are circumferentially distributed on the outer wall of the cylinder 13 at intervals. The second diversion trench is a groove with the same spiral direction as the curved trench. The depth of the second diversion trench is greater than that of the diversion trench. The bottom surfaces of the second diversion trench and the diversion trench are arc surfaces with radial sections in a semicircular shape.

Claims

1. The utility model provides a screw rod of moulding plastics of bolt formula structure, includes the body of rod (1) and sets up spiral shell arris (10) on the body of rod (1) the tip of the body of rod (1) is provided with ends contrary structure, its characterized in that: it includes activity ring (2) and bolt (3) to end contrary structure the tip of the body of rod (1) is provided with spacing convex part (11) that can push up mutually with activity ring (2) and touch be provided with water conservancy diversion projection (12) on the terminal surface of spacing convex part (11), bolt (3) are pegged graft in the spliced eye of water conservancy diversion projection (12), activity ring (2) cover is put on water conservancy diversion projection (12), the preceding terminal surface of activity ring (2) can push up mutually with bolt (3) lateral wall and touch, leaves logical material chamber (15) that can pass through the material between the inner wall of activity ring (2) and the outer wall of water conservancy diversion projection (12).

2. An injection molding screw according to claim 1, characterized in that: a clamping groove which can be inserted with the end part of the movable ring (2) is arranged on the side wall of the bolt (3).

3. An injection molding screw according to claim 1 or 2, characterized in that: spacing convex part (11) are close to water conservancy diversion convex column (12) one end greatly and keep away from the protruding reverse circular truncated cone shape arch that water conservancy diversion convex column (12) one end diameter is little, the protruding tip of reverse circular truncated cone shape and the smooth transition of body of rod (1) surface circumference interval distribution have the guiding gutter on the bellied lateral wall of reverse circular truncated cone shape.

4. An injection molding screw according to claim 3, wherein: the diversion trench is a spiral curved trench.

5. An injection molding screw according to claim 4, wherein: a cylinder (13) for mixing and shearing materials is arranged on the rod body (1) between the flow guide grooves and the screw ridges (10), the outer diameter of the cylinder (13) is the same as the maximum diameter of the inverted-truncated-cone-shaped bulge, and second flow guide grooves are circumferentially distributed on the outer wall of the cylinder (13) at intervals.

6. An injection molding screw according to claim 5, wherein: the second diversion trench is a groove with the same spiral direction as the curved trench.

7. An injection molding screw according to claim 6, wherein: the depth of the second diversion trench is greater than that of the diversion trench.

8. An injection molding screw according to claim 6, wherein: the bottom surfaces of the second diversion trench and the diversion trench are arc surfaces with radial sections in a semicircular shape.

9. An injection molding screw according to claim 1 or 2, characterized in that: annular grooves (14) which are axially and continuously arranged at intervals are arranged on the rod body (1) corresponding to the blanking position.

10. An injection molding screw according to claim 1 or 2, characterized in that: the axial cross section of the screw rib (10) is small at the top end and large at the root, and the included angle (a) between the rear side wall of the screw rib (10) and the outer surface of the rod body (1) is 120 degrees.