CN112536995B

CN112536995B - Mould advances mucilage binding and puts for work piece production

Info

Publication number: CN112536995B
Application number: CN202011297389.2A
Authority: CN
Inventors: 杨慧
Original assignee: Foshan Nanhai District Baixing Toys Co ltd
Current assignee: Foshan Nanhai District Baixing Toys Co Ltd
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2022-09-06
Anticipated expiration: 2040-11-19
Also published as: CN112536995A

Abstract

The invention relates to the technical field of injection molding product production, and discloses a mold glue feeding device for workpiece production, which comprises a charging barrel, wherein a screw rod is arranged in an inner cavity of the charging barrel, a check ring is movably sleeved on the periphery of the screw rod, the top end of the charging barrel is connected with a nozzle, the front end of the screw rod is provided with an end head, a central electromagnet and a side electromagnet are respectively arranged in the charging barrel and the end head, and the check ring is positioned on the rear side of the end head. According to the invention, the screw and the screw head which are connected together conventionally are separated, the screw head and the push rod are driven to move horizontally periodically by the acting force generated by the magnetic field, the functions of conveying and injecting the material liquid are realized, and the screw continuously rotates to realize the plasticization and transmission of the material in the process.

Description

Mould advances mucilage binding and puts for work piece production

Technical Field

The invention relates to the technical field of injection molding product production, in particular to a mold glue feeding device for workpiece production.

Background

The injection molding process is that the thermoplastic plastic or thermosetting plastic is heated, sheared, compressed, mixed and conveyed in a heating machine barrel to be uniformly plasticized, the well-plasticized molten material is accumulated at the front end of the barrel under the blocking action of a nozzle, and then enters a closed low-temperature die cavity through a pouring system of the nozzle and a die by means of the thrust exerted by a screw or a plunger. The injection system of an injection molding machine plasticizes and melts plastic and drops the melt at high pressure and high velocity into a mold cavity. The injection system mainly comprises a plasticizing device (a screw or a plunger, a machine barrel, a nozzle and a heater), a hopper, a metering device, a screw transmission device, an injection oil cylinder, an injection seat integral moving oil cylinder and the like.

After the injection process is finished, the whole mold cavity is filled with the melt, at the moment, the injection screw moves to the foremost position, at the moment, a pressure maintaining stage is carried out, the injection hydraulic cylinder keeps certain pressure, the screw is pushed to continuously apply pressure to the melt in the mold until the melt at the sprue is cooled and sealed, and during pressure maintaining, the screw only moves forwards slightly due to feeding. The dwell time is determined by the thickness of the finished product or no indentation of the finished product, for a workpiece with larger weight, the dwell time is longer, in the dwell stage, the screw cannot plasticize, the amount of the melt needing to be plasticized is larger, if the plasticizing time needed by the melt is longer than the time for cooling and opening and closing the mold, and when the mold is closed, the time interval between two injection molding processes is long, which causes the reduction of the production efficiency of the injection molding machine.

Disclosure of Invention

Aiming at the defects of the existing glue feeding device in the use process in the background art, the invention provides the mould glue feeding device for workpiece production, which has the advantages of prolonging the plasticizing time and improving the glue feeding efficiency and solves the problem that the screw cannot plasticize materials during pressure maintaining in the background art.

The invention provides the following technical scheme: the utility model provides a mould advances mucilage binding and puts for work piece production, includes the feed cylinder, the inner chamber of feed cylinder is equipped with the screw rod, the periphery activity of screw rod has cup jointed the check ring, the top of feed cylinder is connected with the nozzle, the front end of screw rod is equipped with the end, be provided with central electro-magnet and side electro-magnet in feed cylinder and the end respectively, the check ring is located the rear side of end, be equipped with the clamp device that is located the nozzle rear side on the feed cylinder, be equipped with the spiral shell head that is used for saving and carrying the feed liquid in the inner chamber of feed cylinder, the spiral shell head can run through the clamp device and laminate mutually with the inner wall of nozzle, one side fixedly connected with auxiliary connecting rod of spiral shell head, auxiliary connecting rod and end periodic contact and separation.

Preferably, the center of the end head is provided with an inner channel with a through front side, the number of the side electromagnets is four, the side electromagnets are uniformly distributed in the end head, the inner wall of the center of the end head is provided with a flat key groove, and the outer wall of the end head is provided with a flow channel.

Preferably, a feed channel is formed in the screw head, the inlet end of the feed channel is located on the rear side of the screw head, the screw head is formed by connecting the bottom surfaces of two cones, a check valve is arranged at the inlet end of the feed channel, a storage cavity is formed in the inner cavity of the screw head, and a discharge hole is formed in the front end of the screw head.

Preferably, the front end of the auxiliary connecting rod is communicated with an inner cavity of the screw head, the auxiliary connecting rod is hollow, the inner cavity of the auxiliary connecting rod is connected with a sliding plug in a sliding mode, the rear end of the sliding plug is fixedly connected with a push rod, a central permanent magnet is arranged in the push rod, the rear end of the auxiliary connecting rod is fixedly connected with a side permanent magnet, and a flat key bulge matched with the flat key groove is arranged on the outer wall of the push rod.

Preferably, the clamp device comprises an annular shell, a clamping block and a return spring, the surface of the clamping block close to the center of the annular shell is a combination of two sections of quarter conical surfaces and a plane, the plane is connected between the two sections of conical surfaces, the return spring is connected between the inner wall of the annular shell and the clamping block respectively, the conical surfaces at the front end and the rear end of the clamping block are matched with the outer surfaces at the front end and the rear end of a screw head respectively, and a leakage-proof soft plate is connected between the two adjacent clamping blocks.

Preferably, the transverse length of the annular shell is the same as the length of the push rod outside the screw head, and the total length of the screw head and the auxiliary connecting rod is the same as the distance from the plane section of the fixture block to the end head.

Preferably, the central permanent magnet and the side permanent magnets are straight bar permanent magnets, the push rod is matched with the inner channel in size, and the central electromagnet and the side electromagnets are connected with a current controller.

The invention has the following beneficial effects:

1. according to the invention, the screw and the screw head which are connected together conventionally are separated, the screw head and the push rod are driven to move horizontally periodically by the acting force generated by the magnetic field, the functions of conveying and injecting the material liquid are realized, and the screw continuously rotates to realize the plasticization and transmission of the material in the process.

2. According to the invention, the screw head is used for filling materials, the materials are kept in a molten state by utilizing the heat preservation effect of the screw head on the materials, the solidification time of the materials is prolonged, and meanwhile, the plasticizing effect on the materials is further realized in the moving and rotating processes of the screw head, so that the practicability of the glue feeding device is improved.

Drawings

FIG. 1 is a schematic view of the structure of the screw head of the present invention when it is moved backward to the extreme position;

FIG. 2 is a schematic structural view of the screw head of the present invention moving forward to the extreme position;

FIG. 3 is a side cross-sectional view of the screw of the present invention;

FIG. 4 is a side cross-sectional view of the screw head of the present invention;

fig. 5 is a side sectional view of the clip assembly of the present invention.

In the figure: 1. a charging barrel; 2. a screw; 201. a tip; 202. an inner channel; 203. a flow channel; 204. a flat key groove; 3. a non-return ring; 4. a screw head; 401. a feed channel; 402. a discharge port; 403. a material storage cavity; 5. a nozzle; 6. a central electromagnet; 7. a non-return valve; 8. an auxiliary link; 801. a sliding plug; 802. a push rod; 803. a central permanent magnet; 804. a side permanent magnet; 805. a flat key protrusion; 9. a hoop device; 901. an annular housing; 902. a clamping block; 903. a return spring; 904. a leakage-proof soft board; 10. side electromagnets.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, a mold glue feeding device for workpiece production comprises a material barrel 1, a screw rod 2 is disposed in an inner cavity of the material barrel 1, a non-return ring 3 is movably sleeved on the periphery of the screw rod 2, a nozzle 5 is connected to the top end of the material barrel 1, a coil can be wound on the outer wall of the nozzle 5, the nozzle 5 is heated by eddy current generated by energizing the coil, the inner cavity of the nozzle 5 is insulated, the front end of the screw 2 is provided with a tip 201, the front end and the rear end, the front side and the rear side in the application are all based on the direction of the nozzle 5 to the material barrel 1, the nozzle 5 is in front, the material barrel 1 is in rear, the charging barrel 1 and the end 201 are respectively provided with a central electromagnet 6 and a side electromagnet 10, the central electromagnet 6 and the side electromagnet 10 are both connected with a current controller, and the current controller is in the prior art and is mainly used for controlling the magnitude of current passing through the central electromagnet 6 and the side electromagnet 10 and the time interval and duration of current passing; non-return ring 3 is located the rear side of end 201, be equipped with the clamp device 9 that is located the nozzle 5 rear side on the feed cylinder 1, clamp device 9 is located the junction of feed cylinder 1 and nozzle 5, be equipped with the spiral shell head 4 that is used for saving and carrying the feed liquid in the inner chamber of feed cylinder 1, spiral shell head 4 adopts the material preparation that the heat preservation is high, spiral shell head 4 can run through clamp device 9 and laminate mutually with the inner wall of nozzle 5, one side fixedly connected with auxiliary connecting rod 8 of spiral shell head 4, auxiliary connecting rod 8 and end 201 periodic contact and separation.

End 201 plays the effect of the screw head among the prior art and connects the effect of auxiliary connecting rod 8, runner 203 has been seted up to the outer wall of end 201, the material flows to the front end of end 201 from runner 203, the interior passageway 202 that the front side link up is seted up to the center of end 201, the quantity of side electro-magnet 10 is four and evenly distributed in end 201, end 201 can adopt the material preparation that the magnetic permeability is low, side electro-magnet 10, the front end of central electro-magnet 6 all flushes with the outer wall of end 201 mutually, thereby reduce the mutual interference of electromagnetic field between central electro-magnet 6 and the side electro-magnet 10, flat keyway 204 has been seted up to the inner wall at end 201 center.

Screw head 4 is inside to be seted up feed channel 401, the entry end of feed channel 401 is located the rear side of screw head 4, screw head 4 links to each other and forms for two cone bottom surfaces, the entry end department of feed channel 401 is equipped with check valve 7, check valve 7 is used for preventing to get into the material refluence in screw head 4, can use the check valve, storage cavity 403 has been seted up to the inner chamber of screw head 4, the volume of storage cavity 403 is close with the single volume of advancing, it is a bit bigger than the single volume of advancing to glue, be used for when the pressurize, to lasting injection in the mould in order to fill the space that brings because the mould shrink, discharge gate 402 has been seted up to the front end of screw head 4, discharge gate 402 department can set up the design of pressure valve or locking type nozzle among the prior art, just discharge gate 402 is opened when making the feed liquid pressure in the storage cavity 403 reach the certain degree, prevent that the feed liquid in the storage cavity 403 from leaking when not injecting.

The front end of the auxiliary connecting rod 8 is communicated with the inner cavity of the screw head 4, the inner part of the auxiliary connecting rod 8 is hollow, namely the inner cavity of the auxiliary connecting rod 8 is communicated with the material storage cavity 403, the inner cavity of the auxiliary connecting rod 8 is connected with a sliding plug 801 in a sliding manner, the rear end of the sliding plug 801 is fixedly connected with a push rod 802, molten material liquid is filled in the material storage cavity 403 and the front end of the push rod 802, a central permanent magnet 803 is arranged in the push rod 802, the rear end of the auxiliary connecting rod 8 is fixedly connected with a side permanent magnet 804, the central permanent magnet 803 and the side permanent magnet 804 are both straight bar type permanent magnets, the size of the push rod 802 is matched with that of the inner channel 202, a flat key bulge 805 matched with the flat key groove 204 is arranged on the outer wall of the push rod 802, the depth of the flat key groove 204 is larger than that of the flat key bulge 805, namely, after the flat key bulge 805 moves into the flat key groove 204, a certain space is left between the outer wall of the flat key bulge 805 and the inner wall of the end head 201 for the material liquid in the inner channel 202 to flow out, after the flat key protrusion 805 is clamped in the flat key groove 204, the auxiliary connecting rod 8 and the screw head 4 rotate along with the rotation of the screw 2, so as to further plasticize the feed liquid.

The hoop device 9 comprises an annular shell 901, clamping blocks 902 and a return spring 903, the surface of the clamping block 902 close to the center of the annular shell 901 is a combination of two sections of quarter conical surfaces and a plane, the plane is connected between the two sections of conical surfaces, the return spring 903 is respectively connected between the inner wall of the annular shell 901 and the clamping block 902, the conical surfaces at the front end and the rear end of the clamping block 902 are respectively matched with the outer surfaces at the front end and the rear end of a screw head 4, and a leakage-proof soft plate 904 is connected between the two adjacent clamping blocks 902, so that the screw head 4 can be conveniently moved back and forth from the hoop device 9, and the hoop device 9 plays a role in preventing seepage of materials in a nozzle 5 and materials in a charging barrel 1; referring to fig. 2, the transverse length of the annular housing 901 is the same as the length of the push rod 802 outside the screw head 4, when the screw head 4 completely moves to the front end of the hoop device 9, the side permanent magnet 804 is clamped on the rear end surface of the hoop device 9, so that the screw head 4 cannot move forward any more, the outer wall of the screw head 4 is attached to the outer wall of the conical surface at the front end of the hoop device 9, and in addition, the side surface of the screw head 4 is attached to the outer wall of the nozzle 5, so that the feed liquid ejected from the discharge port 402 can be prevented from flowing to the rear side of the screw head 4; the total length of the screw head 4 and the auxiliary link 8 is the same as the distance from the plane section of the clamping block 902 to the end 201, referring to fig. 1, when the auxiliary link 8 moves to contact with the end 201, the front end of the screw head 4 is just located at the front end of the conical surface at the rear section of the clamping block 902, and in the moving process of the screw head 4, the clamping block 902 presses the screw head 4 to ensure that the screw head 4 moves linearly.

The using method of the invention is as follows:

firstly, the screw rod 2 is driven by the motor to rotate, feed liquid flows to a space between the hoop device 9 and the check ring 3 through shearing of the screw rod 2 and spiral transmission of the inner side of the lower check ring 3 on the outer wall of the screw rod and a flow channel 203 on the end head 201, the side electromagnet 10 is electrified through a current controller, a magnetic field generated by the side electromagnet 10 attracts a side permanent magnet 804 to drive the screw head 4 to move towards the end head 201, and at the moment, the outer wall of the screw head 4 props against the clamping block 902 and moves towards the end head 201 by being attached to the outer wall of the clamping block 902;

secondly, when the side permanent magnet 804 moves to contact with the end 201, current is supplied to the central electromagnet 6, a magnetic field generated by the central electromagnet 6 attracts the central permanent magnet 803 to move, so that the sliding plug 801 is driven by the push rod 802 to approach the end 201, a negative pressure region is formed in the material storage cavity 403 due to the outward movement of the sliding plug 801, the material liquid in the charging barrel 1 flows into the material storage cavity 403 through the material inlet channel 401, the push rod 802 moves to contact with the inner wall of the end 201, and the material liquid amount in the material storage cavity 403 is the injection dosage at one time;

thirdly, current is cut off from the central electromagnet 6, reverse current is introduced into the side electromagnets 10, magnetic fields generated by the side electromagnets 10 push the side permanent magnets 804 to move towards the nozzle 5, the screw head 4 jacks up the fixture block 902 and moves along the outer wall of the fixture block 902, and after the screw head 4 moves to the rear end of the screw head to be attached to the outer wall of the fixture block 902, the side permanent magnets 804 are just clamped on the outer wall of the clamp device 9, and at the moment, the screw head 4 cannot move forwards; then, current is supplied to the central electromagnet 6, so that the magnetic field generated by the central electromagnet 6 pushes the central permanent magnet 803, the push rod 802 and the sliding plug 801 to move forward along the inner wall of the auxiliary connecting rod 8, the pressure of the feed liquid in the storage cavity 403 opens the discharge hole 402 and flows out, thereby realizing the injection and pressure maintaining of the feed liquid, and the glue feeding device is suitable for materials without magnetic shielding effect.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a work piece production is with mould advances mucilage binding and is put, includes feed cylinder (1), the inner chamber of feed cylinder (1) is equipped with screw rod (2), non-return ring (3) have been cup jointed in the periphery activity of screw rod (2), the top of feed cylinder (1) is connected with nozzle (5), its characterized in that: the front end of the screw rod (2) is provided with an end socket (201), a central electromagnet (6) and a side electromagnet (10) are respectively arranged in the material barrel (1) and the end socket (201), the non-return ring (3) is positioned on the rear side of the end socket (201), a hoop device (9) positioned on the rear side of the nozzle (5) is arranged on the material barrel (1), a screw head (4) used for storing and conveying material liquid is arranged in an inner cavity of the material barrel (1), the screw head (4) can penetrate through the hoop device (9) and is attached to the inner wall of the nozzle (5), one side of the screw head (4) is fixedly connected with an auxiliary connecting rod (8), and the auxiliary connecting rod (8) is periodically contacted with and separated from the end socket (201);

an inner channel (202) with a through front side is formed in the center of the end head (201), the number of the side electromagnets (10) is four, the side electromagnets are uniformly distributed in the end head (201), a flat key groove (204) is formed in the inner wall of the center of the end head (201), and a flow channel (203) is formed in the outer wall of the end head (201);

a feeding channel (401) is formed in the screw head (4), the inlet end of the feeding channel (401) is located on the rear side of the screw head (4), the screw head (4) is formed by connecting the bottom surfaces of two cones, a check valve (7) is arranged at the inlet end of the feeding channel (401), a storage cavity (403) is formed in the inner cavity of the screw head (4), and a discharge hole (402) is formed in the front end of the screw head (4);

the front end of the auxiliary connecting rod (8) is communicated with an inner cavity of the screw head (4), the auxiliary connecting rod (8) is hollow, the inner cavity of the auxiliary connecting rod (8) is connected with a sliding plug (801) in a sliding mode, the rear end of the sliding plug (801) is fixedly connected with a push rod (802), a central permanent magnet (803) is arranged in the push rod (802), the rear end of the auxiliary connecting rod (8) is fixedly connected with a side permanent magnet (804), and a flat key bulge (805) matched with the flat key groove (204) is arranged on the outer wall of the push rod (802);

the central permanent magnet (803) and the side permanent magnets (804) are straight strip permanent magnets, the push rod (802) is matched with the inner channel (202) in size, and the central electromagnet (6) and the side electromagnets (10) are both connected with a current controller.

2. The mold glue feeding device for workpiece production according to claim 1, characterized in that: the hoop device (9) comprises an annular shell (901), a clamping block (902) and a return spring (903), the surface of the clamping block (902), which is close to the center of the annular shell (901), is a combination of two sections of quarter conical surfaces and a plane, the plane is connected between the two sections of conical surfaces, the return spring (903) is respectively connected between the inner wall of the annular shell (901) and the clamping block (902), the conical surfaces at the front end and the rear end of the clamping block (902) are respectively matched with the outer surfaces at the front end and the rear end of a screw head (4), and a leakage-proof soft plate (904) is connected between the two adjacent clamping blocks (902).

3. The mold glue feeding device for workpiece production according to claim 2, characterized in that: the transverse length of the annular shell (901) is the same as the length of the push rod (802) located outside the screw head (4), and the total length of the screw head (4) and the auxiliary connecting rod (8) is the same as the distance between the plane section of the clamping block (902) and the end head (201).