CN116079982A

CN116079982A - Rubber injection device

Info

Publication number: CN116079982A
Application number: CN202310007332.1A
Authority: CN
Inventors: 沈功能; 孔万军; 朱华杰; 李健波
Original assignee: Yuyao Watai Rubber & Plastics Machinery Co ltd
Current assignee: Yuyao Watai Rubber & Plastics Machinery Co ltd
Priority date: 2023-01-04
Filing date: 2023-01-04
Publication date: 2023-05-09
Anticipated expiration: 2043-01-04
Also published as: CN116079982B

Abstract

The application relates to a rubber injection device, which comprises a base, a pre-glue assembly and a glue injection assembly; the pre-glue component is provided with a butt joint seat, and the upper surface of the butt joint seat is provided with a discharge hole communicated with the interior of the pre-glue component; the glue injection assembly is provided with a glue injection seat of a short flow channel, the lower surface of the glue injection seat of the short flow channel is provided with a glue injection hole communicated with the discharge hole, and the glue injection hole is communicated with the inside of the glue injection assembly; the upper surface of the butt joint seat is flush with the lower surface of the glue injection seat of the short flow channel; the pre-glue assembly is connected with the base in a sliding manner along the length direction or the width direction of the base, and the base is provided with a moving assembly for driving the pre-glue assembly to slide in a reciprocating manner; the butt joint seat and the pre-glue component synchronously slide. When the glue injection assembly injects glue to the mould, the glue injection hole and the discharge hole are kept in a separated state; the injection is completed once, and the injection Kong Duan runner is arranged, so that no residual material is left, the injection precision is high, and the quality of injection molding of products is guaranteed.

Description

Rubber injection device

Technical Field

The application relates to the technical field of rubber injection molding, in particular to a rubber injection device.

Background

Rubber injection molding is a production method in which a rubber material is heated by an injector to form a molten rubber compound, and then injected into a closed mold from a cylinder under pressure, and vulcanized under pressure to obtain a product.

The injection machine for rubber injection molding generally comprises a pre-rubber cylinder body with the length direction arranged along the horizontal direction and a rubber injection cylinder body with the length direction arranged along the vertical direction; one end of the pre-rubber cylinder body is a discharge end, and the other end of the pre-rubber cylinder body is provided with a feed inlet for adding rubber raw materials into the pre-rubber cylinder body; the pre-rubber cylinder body is provided with a heating structure for enabling rubber raw materials falling into the pre-rubber cylinder body to form molten rubber materials; a pre-glue screw is arranged in the pre-glue cylinder body, and the pre-glue screw is rotationally connected with the pre-glue cylinder body and used for conveying glue materials in the pre-glue cylinder body to the position of the discharge end; the lower end of the glue injection cylinder is provided with a glue outlet channel, and the discharge end of the pre-glue cylinder is communicated with the inside of the glue outlet channel so as to enable glue to flow into the glue injection cylinder from the glue outlet channel; an injection plunger is arranged in the glue injection cylinder and driven by the oil cylinder to move downwards, so that glue in the glue injection cylinder can be extruded into a corresponding forming die from an outlet of the glue outlet channel to form a corresponding product.

The common model pre-glue cylinder body and the glue injection cylinder body are connected, and only a check valve is additionally arranged for control. However, during glue injection, sometimes a small amount of material of the pre-glue cylinder body enters the glue injection cylinder body, and the runner length and the residual material are large, so that the precision is not high, the product quality is affected, and the improvement is needed.

Disclosure of Invention

The purpose of the application is to provide a rubber injection device, so that the pre-glue operation is separated from glue injection, a glue injection runner is ultra-short, the injection is completed at one time, no residual material exists, the injection precision is higher, and the quantity of the injected material is equal to the quantity of the fed material, so that the product quality is ensured; a screw sleeve is arranged, and the glue stock is prevented from flowing out of a feed inlet, namely, the glue stock is prevented from being reversely fed during pre-glue.

The application provides a rubber injection device adopts following technical scheme:

a rubber injection device comprises a base, a pre-glue assembly for outputting glue stock and a glue injection assembly communicated with a discharge end of the pre-glue assembly; the pre-glue assembly is provided with a butt joint seat, and the upper surface of the butt joint seat is provided with a discharge hole communicated with the interior of the pre-glue assembly; the glue injection assembly is provided with a glue injection seat of a short flow channel, the lower surface of the glue injection seat of the short flow channel is provided with a glue injection hole communicated with the discharge hole, and the glue injection hole is communicated with the inside of the glue injection assembly; the upper surface of the butt joint seat is flush with the lower surface of the glue injection seat of the short flow channel; the pre-glue assembly is connected with the base in a sliding manner along the length direction or the width direction of the base, and the base is provided with a moving assembly for driving the pre-glue assembly to slide in a reciprocating manner; the butt joint seat and the pre-glue assembly slide synchronously.

By adopting the technical scheme, when the glue injection device is used, the moving assembly drives the pre-glue assembly to move towards the glue injection assembly so as to align the discharge hole with the glue injection hole, and glue in the pre-glue assembly is injected into the glue injection assembly through the discharge hole and the glue injection hole; then, the moving assembly drives the pre-glue assembly to move in the direction away from the glue injection assembly, so that the butt joint seat is separated from the glue injection seat of the short runner, and glue materials in the butt joint seat can be injected into a designated die through the glue injection holes by the glue injection assembly, so that corresponding products are formed. When the glue injection assembly injects glue to the mould, the glue injection hole is kept separate from the discharge hole, so that the possibility that the glue in the glue injection assembly flows back to the pre-glue assembly is avoided; meanwhile, when the glue injection assembly injects glue to the mould, the glue injection hole is kept in a sealed state, so that the possibility of insufficient glue injection amount of a product caused by glue leakage is avoided, and the quality of injection molding of the product is ensured.

Optionally, the pre-glue assembly comprises a pre-glue barrel, a pre-glue screw rod rotationally connected with the inner side wall of the pre-glue barrel, a rotating piece for driving the pre-glue screw rod to rotate, and a heating structure for heating rubber raw materials in the pre-glue barrel, wherein the rotating piece and the heating structure are both connected with the pre-glue barrel; the butt joint seat is connected with the discharge end of the pre-glue cylinder body; a feeding hole for inputting rubber raw materials into the pre-rubber cylinder body is formed in one end, far away from the butt joint seat, of the pre-rubber cylinder body; the pre-glue screw is used for driving rubber raw materials input by the feed inlet to move towards the butt joint seat.

By adopting the technical scheme, the rubber raw material is input into the pre-rubber cylinder body through the feed inlet; the pre-rubber screw rotates, the pre-rubber screw can drive the rubber raw material to move towards the butt joint seat, and meanwhile, the heating structure can heat the rubber raw material to enable the rubber raw material to form molten rubber; the sizing material can flow along with the rotation of the pre-sizing screw rod to the direction of the butt joint seat so as to be output upwards from the discharge hole.

Optionally, the pre-glued screw comprises a rod body and screw edges arranged on the peripheral wall of the rod body; the rod body is rotationally connected with the inner side wall of the pre-glue barrel, and the peripheral wall of the screw rib is attached to the inner side wall of the pre-glue barrel; the peripheral wall of the rod body is provided with a matching ring, and the matching ring is positioned at one side of the charging hole away from the butt joint seat; the pre-glue cylinder body is provided with a screw rod sleeve, the inner side wall of the screw rod sleeve is attached to the peripheral wall of the matching ring, and the matching ring can rotate relative to the screw rod sleeve; the circumferential wall of the screw sleeve, which is positioned in the screw sleeve, is provided with a spiral groove for accommodating sizing material along the circumferential direction of the screw sleeve, and two ends of the spiral groove are closed; one end of the screw sleeve, which is far away from the matching ring, is provided with a blocking block for blocking the sizing material and used for blocking the sizing material from flowing out of the charging hole.

By adopting the technical scheme, when the sizing material is injected into the sizing material injection hole, the pressure in the pre-sizing cylinder body is increased, so that the sizing material can flow back to the direction of the screw sleeve from the gap between the screw edge and the inner side wall of the pre-sizing cylinder body; when the sizing material flows to the gap between the matching ring and the screw sleeve, the sizing material can flow into the spiral groove so as to enable the sizing material to flow along the inner side wall of the spiral groove, so that the flowing speed of the sizing material is slowed down, and the sizing material is gradually cooled; after the spiral groove is filled with the sizing material and cooled, the sizing material in the spiral groove can play a sealing role so as to improve the tightness between the screw sleeve and the matching ring. The blocking block can block the sizing material so as to reduce the possibility of the sizing material moving towards the feeding opening, thereby reducing the risk of occurrence of a material reversing condition.

Optionally, a matching bump is arranged on the lower surface of the glue injection seat of the short flow channel along the circumferential direction of the glue injection hole; the butt joint seat is provided with a matching groove for being in plug-in matching with the matching convex block; the glue injection assembly is connected with the base in a sliding manner along the up-down direction, and the base is provided with a driving assembly for driving the glue injection cylinder to slide up and down; and the glue injection seat of the short flow channel and the driving assembly synchronously move.

Through adopting above-mentioned technical scheme, cooperation lug and cooperation groove grafting cooperation are favorable to improving the area of contact between the injecting glue seat of butt joint seat and short runner to the possibility that the sizing material takes place to leak when the downthehole injecting glue of reduction is glued to the injecting glue.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the glue injection assembly injects glue to the mould, the glue injection hole is kept separate from the discharge hole and is kept in a sealed state, and the glue injection hole is completely injected at one time without residual materials during injection, so that the injection molding quality of products is ensured;

2. the screw sleeve is matched with the matching ring, and the glue stock flowing into the spiral groove can play a role in sealing and exhausting so as to improve the tightness between the screw sleeve and the matching ring; one end of the screw sleeve, which is far away from the matching ring, is provided with a blocking block for blocking the sizing material, and the blocking block is used for blocking the sizing material from flowing out of the feed inlet, namely reducing the possibility of occurrence of the material return condition.

Drawings

Fig. 1 is a schematic view of the overall structure of a rubber injection device according to an embodiment of the present application.

Fig. 2 is a schematic cross-sectional view taken along line A-A in fig. 1.

Fig. 3 is an enlarged view of a portion B in fig. 2.

Fig. 4 is a schematic view for showing a state in which the docking station is separated from the injection station of the short runner.

Fig. 5 is an enlarged view of a portion C in fig. 3.

Fig. 6 is a schematic diagram for showing the structure of the screw sleeve.

In the figure, 1, a base; 11. a guide rod; 12. an upper guide rod; 13. a drive assembly; 131. a connecting plate; 14. a moving assembly; 2. a pre-glue assembly; 21. a pre-glue cylinder; 211. a fixing seat; 212. a rotating sleeve; 2121. a mounting frame; 2122. a feed inlet; 213. pre-rubber sleeve; 2131. a heating oil passage; 2132. sealing sleeve; 2133. an oil inlet pipe; 2134. an oil outlet pipe; 22. a pre-glue screw; 221. a rod body; 222. screw edges; 23. a rotating member; 3. a glue injection assembly; 31. a glue injection cylinder; 311. a connecting frame; 312. injecting glue sleeves; 3121. installing a screw hole; 3122. a heat exchange hole; 3123. a communication hole; 3124. a liquid pipe; 3125. a communicating pipe; 32. an injection plunger; 33. an injection driver; 4. a sliding seat; 41. a guide hole; 5. a butt joint seat; 51. a receiving chamber; 52. a discharge hole; 53. a mating groove; 6. a short runner glue injection seat; 61. a glue injection hole; 62. fitting the protruding blocks; 7. a mating ring; 71. a spiral groove; 8. a screw sleeve; 81. and a blocking piece.

Detailed Description

The present application is described in further detail below with reference to fig. 1-6.

A rubber injection device, referring to fig. 1, comprises a base 1, a pre-rubber component 2 and a rubber injection component 3; the glue injection assembly 3 is positioned above the base 1, and the pre-glue assembly 2 is positioned at one side of the base 1 along the length direction thereof.

Referring to fig. 1 and 2, the pre-glue assembly 2 includes a pre-glue cylinder 21, a pre-glue screw 22, a rotating member 23, and a heating structure. The pre-glue cylinder 21 comprises a fixing seat 211, a rotating sleeve 212 and a pre-glue sleeve 213, wherein the fixing seat 211, the rotating sleeve 212 and the pre-glue sleeve 213 are hollow and have two through ends. The axial direction of the fixing seat 211 is arranged along the length direction of the base 1; the lower surface of the fixing seat 211 is fixedly connected with a sliding seat 4 through bolts, and the sliding seat 4 is provided with a guide hole 41 in a penetrating way along the axial direction of the fixing seat 211. The end wall of the base 1 facing the direction of the fixed seat 211 is fixedly connected with a guide rod 11 through a flange, the guide rod 11 is inserted into a guide hole 41, and the guide hole 41 is in sliding fit with the guide rod 11 so that the fixed seat 211 can slide relative to the base 1. In another embodiment, the pre-glue assembly 2 may also be disposed on one side of the base 1 along the width direction of the base 1, and the fixing base 211 slides along the width direction of the base 1 relative to the base 1.

Referring to fig. 1 and 2, the rotation sleeve 212 is positioned at one side of the fixing base 211 near the base 1. The peripheral wall of one end of the rotating sleeve 212 is integrally formed with a mounting bracket 2121, and the mounting bracket 2121 extends along the axial direction of the rotating sleeve 212 toward the fixed seat 211. One end of the mounting bracket 2121, which is far from the rotating sleeve 212, is fixed to an end wall of the fixing base 211, which is close to one end of the base 1, by bolts, so that a space is formed between the rotating sleeve 212 and the fixing base 211. One end of the pre-glue sleeve 213 is fixed with the end wall of the end, far away from the fixed seat 211, of the rotating sleeve 212 through a flange. The end of the pre-glue sleeve 213, which is far away from the rotating sleeve 212, is a discharge end, a butt joint seat 5 is arranged at the position of the pre-glue sleeve 213 at the discharge end, and the butt joint seat 5 is fixed with the end wall of the pre-glue sleeve 213 through bolts so as to seal the discharge end of the pre-glue sleeve 213. The outer peripheral wall of the rotating sleeve 212 is integrally formed with a charging port 2122, and the charging port 2122 communicates with the inside of the rotating sleeve 212.

Referring to fig. 2 and 3, the inside of the docking station 5 is integrally formed with a receiving chamber 51, and the receiving chamber 51 communicates with the inside of the pre-rubber sleeve 213. The pre-glue screw 22 comprises a stem 221 and a flight 222. One end of the rod 221 is rotatably connected with the inner side wall of the fixing seat 211 through a bearing, and the other end sequentially penetrates through the inside of the rotating sleeve 212 and the pre-glue sleeve 213 along the axial direction of the fixing seat 211 and extends into the accommodating cavity 51. Screw rib 222 is integrally formed on the peripheral wall of rod 221; the end wall of one end of the screw rib 222 is positioned at one side of the charging port 2122 close to the fixed seat 211, the end wall of the other end is positioned in the accommodating cavity 51, and the peripheral wall of the screw rib 222 is attached to the inner side wall of the pre-rubber sleeve 213. The rotary member 23 includes a hydraulic motor; the rotating member 23 is fixed to an end wall of the fixing base 211, which is far away from the rotating sleeve 212, through bolts, and an output shaft of the rotating member 23 is connected with the rod 221 through a key so as to drive the rod 221 to rotate. After the rubber raw material is input into the rotating sleeve 212 through the charging hole 2122, the rotating piece 23 drives the rod body 221 to rotate so as to enable the screw rib 222 to rotate, and therefore the screw rib 222 drives the rubber raw material to move towards the accommodating cavity 51.

Referring to fig. 3, a heating oil passage 2131 is provided in the outer circumferential wall of the pre-rubber sleeve 213, and the heating oil passage 2131 is spiral in the circumferential direction of the pre-rubber sleeve 213. The heating structure comprises a sealing sleeve 2132; the sealing sleeve 2132 is sleeved on the outer circumferential wall of the pre-glue sleeve 213 to seal the heating oil duct 2131. One end of the sealing sleeve 2132 is welded and fixed with an oil inlet pipe 2133, the other end is welded and fixed with an oil outlet pipe 2134, and the oil inlet pipe 2133 and the oil outlet pipe 2134 are communicated with the heating oil duct 2131. Heat exchange fluid is input from the oil inlet pipe 2133, can flow to the heating oil duct 2131 and is output from the oil outlet pipe 2134; the heat exchange fluid in the heating oil duct 2131 can exchange heat with the rubber raw material in the pre-rubber sleeve 213 through the pre-rubber sleeve 213 to raise the temperature of the rubber raw material, so that the rubber raw material forms molten rubber; the glue may move into the receiving cavity 51 as the screw flight 222 rotates. In this embodiment, the heat exchange fluid comprises hot oil; in another embodiment, the heat exchange fluid may also be hot water or other flowable medium.

Referring to fig. 2 and 3, an upper guide bar 12 is fixed to the upper surface of the base 1 through a flange, and one end of the upper guide bar 12, which is far from the base 1, extends upward. The glue injection assembly 3 comprises a glue injection cylinder 31, an injection plunger 32 and an injection driving piece 33; the glue injection cylinder 31 comprises a connecting frame 311 and a glue injection sleeve 312. The connecting frame 311 is sleeved on the upper guide rod 12, and the connecting frame 311 can slide up and down. The glue injection sleeve 312 is in a cylinder shape with a hollow inside and two ends penetrating through; the glue injection sleeve 312 is axially arranged along the up-down direction, and the upper end of the glue injection sleeve 312 is fixed with the connecting frame 311 through a flange. The inner side wall of the lower end of the glue injection sleeve 312 is provided with a mounting screw hole 3121, and the mounting screw hole 3121 is communicated with the inside of the glue injection sleeve 312. The inner side wall of the installation screw hole 3121 is connected with a glue injection seat 6 of a short flow channel in a threaded manner so as to seal the lower end of the glue injection sleeve 312.

Referring to fig. 2 and 3, the lower end of the injection plunger 32 is inserted into the injection sleeve 312, and the peripheral wall of the lower end of the injection plunger 32 is fitted to the inner side wall of the injection sleeve 312. The upper end of the injection plunger 32 is located outside of the sprue bush 312; the injection driving member 33 includes an oil cylinder, a cylinder body of the injection driving member 33 is fixed to an upper end of the connection frame 311 through a flange, and a piston rod of the injection driving member 33 is fixed to an upper end of the injection plunger 32 through a flange. The base 1 is provided with a drive assembly 13, the drive assembly 13 being located at a position above the cylinder of the injection drive 33. The drive assembly 13 comprises an oil cylinder; the cylinder body of the driving assembly 13 is fixedly connected with a connecting plate 131 through bolts, and the connecting plate 131 is fixedly connected with the upper guide rod 12. The piston rod of the driving assembly 13 extends downward and is fixed to the cylinder of the injection driving member 33 by a flange for driving the connection frame 311 to slide up and down.

Referring to fig. 2 and 3, the upper end of the docking station 5 protrudes to a position above the peripheral wall of the upper side of the pre-rubber jacket 213. The upper surface of the butt joint seat 5 is provided with a discharging hole 52 downwards, and the discharging hole 52 is communicated with the inside of the accommodating cavity 51 so as to allow the sizing material in the accommodating cavity 51 to be output upwards from the discharging hole 52. The base 1 is provided with a moving assembly 14, and the moving assembly 14 comprises an oil cylinder; the cylinder body of the moving assembly 14 is fixed with the guide seat through bolts, and the piston rod of the moving assembly 14 is fixed with the base 1 through a flange so as to drive the fixed seat 211 to move. The lower surface of the short flow channel glue injection seat 6 is provided with a glue injection hole 61 in an upward penetrating way, and the glue injection hole 61 is a short flow channel; the glue injection hole 61 communicates with the inside of the glue injection sleeve 312; when the sliding seat 4 moves towards the direction of the base 1, the discharging hole 52 can be aligned with the glue injection hole 61; at this time, the driving assembly 13 drives the connecting frame 311 to move downward, so that the lower surface of the injection seat 6 of the short runner is flush with the upper surface of the docking seat 5, and the injection seat 6 of the short runner and the docking seat 5 are tightly attached to each other, so that the glue in the discharge hole 52 flows from the glue injection hole 61 into the glue injection sleeve 312.

Referring to fig. 3 and 4, the lower surface of the injection seat 6 of the short runner is integrally formed with a fitting protrusion 62 along the circumferential direction of the injection hole 61, and the fitting protrusion 62 is hemispherical. The upper surface of the butt joint seat 5 is provided with a matching groove 53 along the circumferential direction of the discharging hole 52; the matching groove 53 is in plug-in matching with the matching convex block 62 so as to improve the tightness of the connection between the butt joint seat 5 and the short runner glue injection seat 6.

Referring to fig. 2 and 3, the upper end wall of the injection molding sleeve 312 is provided with heat exchange holes 3122 downward, one side of the heat exchange holes 3122 along the circumferential direction of the injection molding sleeve 312 is provided with a plurality of heat exchange holes 3122, the inner side wall of the lower end of each heat exchange hole 3122 is provided with a communication hole 3123 penetrating through in the radial direction of the injection molding sleeve 312, and the communication hole 3123 is communicated with the outer peripheral wall of the injection molding sleeve 312. The inner side wall of the upper end of each heat exchange hole 3122 is in threaded connection with a liquid passing pipe 3124, and the inner side wall of each communication hole 3123 is in threaded connection with a communication pipe 3125; all of the communicating pipes 3125 are connected in common to the oil outlet pipe 2134 through pipes. The heat exchange fluid flowing out of the oil outlet pipe 2134 flows through the pipe to the communicating pipe 3125 and into the heat exchange holes 3122 to raise the temperature in the pre-rubber jacket 213, so that the rubber material flowing into the pre-rubber jacket 213 can be maintained in a molten state. The heat exchange fluid in the heat exchange hole 3122 is output from the fluid pipe 3124.

Referring to fig. 5 and 6, a circumferential wall of the rod 221 at one end thereof located in the rotating sleeve 212 is integrally formed with a mating ring 7, and the mating ring 7 is in a circular ring shape; the mating ring 7 is located on the side of the fill port 2122 near the holder 211, and the end wall of the mating ring 7 is connected to the end wall of the screw 222. One end of the rotating sleeve 212, which is close to the fixed seat 211, is inserted with a screw sleeve 8, the screw sleeve 8 is cylindrical, one end of the screw sleeve 8 is fixed with the end wall of the rotating sleeve 212, which faces the fixed seat 211, through a flange, and the other end of the screw sleeve 8 is integrally formed with a blocking block 81 for preventing material reflection. The outer peripheral wall of the screw sleeve 8 is attached to the inner side wall of the rotating sleeve 212, and the inner side wall of the screw sleeve 8 is attached to the outer peripheral wall of the matching ring 7 to seal the rotating sleeve 212.

Referring to fig. 5 and 6, the outer peripheral wall of the mating ring 7 is opened and closed with a spiral groove 71, the spiral groove 71 is opened in the circumferential direction of the mating ring 7, and the spiral groove 71 is located at a position inside the screw sleeve 8. Both ends of the spiral groove 71 are closed; when the sizing material flows to the position between the screw sleeve 8 and the matching ring 7, the sizing material needs to flow into the spiral groove 71 in the process of continuing to flow towards the direction of the fixing seat 211, so that the flowing speed of the sizing material can be slowed down, the sizing material can be gradually cooled, and the sealing property between the matching ring 7 and the screw sleeve 8 can be improved after the sizing material is cooled and solidified.

The implementation principle of the embodiment of the application is as follows:

in use, rubber material is added to the rotating sleeve 212 through the feed port 2122; the rotating piece 23 drives the pre-glue screw 22 to rotate so as to enable the rubber raw material to move towards the butt joint seat 5; in the process of moving the rubber raw material, the heating structure can enable the rubber raw material to form molten sizing material; after the glue flows into the receiving cavity 51, the glue can flow into the glue injection sleeve 312 from the discharge hole 52 and the glue injection hole 61; then, the driving assembly 13 moves the glue injection sleeve 312 upwards, and the moving assembly 14 drives the fixing seat 211 to move in a direction away from the glue injection seat 6 of the short flow channel so as to separate the butt joint seat 5 from the glue injection seat 6 of the short flow channel; then aligning the glue inlet of the forming die with the glue injection hole 61; finally, the glue injection sleeve 312 moves downwards so that the glue injection seat 6 of the short runner is abutted with the forming die; the injection driver 33 drives the injection plunger 32 downward to inject the glue in the glue collar 312 into the forming mold.

When injecting glue into the forming die, the butt joint seat 5 is separated from the glue injection seat 6 of the short runner, and the glue injection hole 61 is kept in a closed state, so that the possibility of glue backflow or leakage is reduced, and the glue is completely injected once without residual materials during injection, so that the quantity of glue injected into the forming die is ensured, and the injection precision is higher, so that the quality of injection-molded products is ensured.

The embodiments of this embodiment are all preferred embodiments of the present application, and are not intended to limit the scope of the present application, in which like parts are denoted by like reference numerals. Therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. The rubber injection device comprises a base (1), a pre-glue component (2) for outputting glue stock, and a glue injection component (3) communicated with the discharge end of the pre-glue component (2); the method is characterized in that: the pre-glue assembly (2) is provided with a butt joint seat (5), and the upper surface of the butt joint seat (5) is provided with a discharge hole (52) communicated with the interior of the pre-glue assembly (2); the glue injection assembly (3) is provided with a glue injection seat (6) with a short flow channel, the lower surface of the glue injection seat (6) with the short flow channel is provided with a glue injection hole (61) communicated with the discharge hole (52), and the glue injection hole (61) is communicated with the inside of the glue injection assembly (3); the upper surface of the butt joint seat (5) is flush with the lower surface of the glue injection seat (6) of the short flow channel; the pre-glue assembly (2) is connected with the base (1) in a sliding manner along the length direction or the width direction of the base (1), and the base (1) is provided with a moving assembly (14) for driving the pre-glue assembly (2) to slide in a reciprocating manner; the butt joint seat (5) and the pre-glue assembly (2) move synchronously.

2. The rubber injection device of claim 1, wherein: the pre-glue assembly (2) comprises a pre-glue barrel (21), a pre-glue screw (22) rotationally connected with the inner side wall of the pre-glue barrel (21), a rotating piece (23) for driving the pre-glue screw (22) to rotate, and a heating structure for heating rubber raw materials in the pre-glue barrel (21), wherein the rotating piece (23) and the heating structure are both connected with the pre-glue barrel (21); the butt joint seat (5) is connected with the discharge end of the pre-glue cylinder body (21); one end of the pre-rubber cylinder (21) far away from the butt joint seat (5) is provided with a charging hole for inputting rubber raw materials into the pre-rubber cylinder (21); the pre-glue screw (22) is used for driving rubber raw materials input by the feed port (2122) to move towards the butt joint seat (5).

3. The rubber injection device of claim 2, wherein: the pre-glue screw (22) comprises a rod body (221) and screw edges (222) arranged on the peripheral wall of the rod body (221); the rod body (221) is rotationally connected with the inner side wall of the pre-glue cylinder body (21), and the peripheral wall of the screw rib (222) is attached to the inner side wall of the pre-glue cylinder body (21); the peripheral wall of the rod body (221) is provided with a matching ring (7), and the matching ring (7) is positioned at one side of the charging hole (2122) away from the butt joint seat (5); the pre-glue cylinder body (21) is provided with a screw rod sleeve (8), the inner side wall of the screw rod sleeve (8) is attached to the peripheral wall of the matching ring (7), and the matching ring (7) can rotate relative to the screw rod sleeve (8); the circumferential wall of the fit ring (7) positioned in the screw sleeve (8) is provided with a spiral groove (71) for accommodating sizing material along the circumferential direction of the fit ring (7), and two ends of the spiral groove (71) are closed; one end, far away from the matching ring (7), of the screw sleeve (8) in the length direction is provided with a blocking block (81) for blocking sizing materials and used for blocking the sizing materials from flowing out of the charging port (2122).

4. The rubber injection device of claim 1, wherein: the lower surface of the short runner glue injection seat (6) is provided with a matching lug (62) along the circumferential direction of the glue injection hole (61); the butt joint seat (5) is provided with a matching groove (53) for being in plug-in matching with the matching convex block (62); the glue injection assembly (3) is connected with the base (1) in a sliding manner along the up-down direction, and the base (1) is provided with a driving assembly (13) for driving the glue injection cylinder body (31) to slide up and down; the glue injection seat (6) of the short flow channel and the driving assembly (13) synchronously move.