CN218477082U - Glue melting injection device for injection molding machine - Google Patents

Abstract

The utility model discloses a melten gel injection device for injection molding machine, including penetrating mucilage gel device and melten gel device, the melten gel device includes the melten gel section of thick bamboo, it is connected and is formed with the gluey passageway of penetrating that is used for penetrating gluey with the front end of melten gel section of thick bamboo to penetrate the mucilage gel device, the melten gel section of thick bamboo embeds there is the screw rod of rotatable and back-and-forth movement and makes and form the melten gel room between melten gel section of thick bamboo and the screw rod, the front end of screw rod is equipped with glues the head, it forms the measurement room along with retreating and penetrating the gluey passageway along with the screw rod when the melten gel to cross the gluey head, cross gluey overhead activity and be provided with rotatory rubber ring of crossing therewith, and make this rubber ring cross and move backward and press in the junction of crossing gluey head and screw rod under the pressure differential action of measurement room and melten gel chamber when penetrating, get into the measurement room with the indoor fuse-element of sealing, thereby keep the weight of the indoor fuse-element when penetrating gluey stable, make the weight and the size of goods stable, and then promote the injection moulding precision of product.

Description

Melt adhesive injection device for injection molding machine

Technical Field

The utility model relates to an injection molding machine technical field especially relates to a melten gel injection device for injection molding machine.

Background

At present, an injection molding machine generally adopts a screw type molten rubber injection mode, and a screw type plasticizing device mainly comprises a rubber passing head, a screw, a rubber passing ring, a charging barrel, a nozzle, a motor and the like, and is a core component for completing uniform plasticizing and realizing quantitative injection of the injection molding machine. Wherein, screw plasticization theory of operation does: during preplasticizing, the motor drives the screw rod to rotate, materials falling into a screw groove (a gap between the screw rod and the inner wall of the charging barrel) from a feeding port on the charging barrel are continuously pushed forwards, the heating ring transfers heat to the materials through the wall of the charging barrel, solid materials are plasticized and melted under the double actions of external heating and rotary shearing of the screw rod and through the thermal history of each functional section of the screw rod, and in the process of melting glue, the plasticized materials flow into the front end of a glue head through the glue ring under the action of the screw rod and generate back pressure to push the screw rod to move backwards to complete metering of the molten materials; during injection, the screw rod plays the role of a plunger and moves forwards rapidly under the action of the oil cylinder to inject melt in the metering chamber into a mold through the nozzle. However, the conventional screw plasticizing device has a defect in structure, so that the weight of the melt in the metering chamber is unstable during injection, and the injection precision of the melt is affected.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model aims to provide a melten gel injection device for injection molding machine, it can keep the indoor fuse-element of measurement stable in weight when penetrating the glue, improves the injection precision of fuse-element to make the weight and the dimensional stability of goods, promote the injection moulding precision of product.

The purpose of the utility model is realized by adopting the following technical scheme:

a glue melting injection device for an injection molding machine comprises a glue injection device and a glue melting device, wherein the glue melting device comprises a glue melting cylinder, the glue injection device is connected with the front end of the glue melting cylinder and is provided with a glue injection channel for injecting glue, a screw rod capable of rotating and moving back and forth is arranged in the glue melting cylinder to enable a glue melting chamber to be formed between the glue melting cylinder and the screw rod, a glue passing head is arranged at the front end of the screw rod and forms a metering chamber with the glue injection channel along with the retreating of the screw rod during glue melting, a glue passing ring capable of rotating along with the glue passing head is movably arranged on the glue passing head, and the glue passing ring is enabled to move backwards under the pressure difference effect of the metering chamber and the glue melting chamber during glue injection and abut against the joint of the glue passing head and the screw rod so as to seal a melt in the glue melting chamber from entering the metering chamber.

Furthermore, cross the rubber head and be provided with the connecting piece along self radially, cross and seted up on the rubber ring and supply the connecting piece male U-shaped groove, the opening in U-shaped groove runs through cross the preceding terminal surface on the rubber ring.

Further, the U-shaped groove is provided with two, two relative setting is established to the U-shaped groove, the connecting piece is worn to locate cross the joint portion of gluing the head in order to form double-phase relative setting and respectively with each U-shaped groove joint.

Further, the contact surface of the clamping part and the U-shaped groove is a spherical surface.

Further, cross gluey head with screw rod integrated into one piece.

Furthermore, penetrate mucilage binding and put including hollow and both ends are open and penetrate the mouth, penetrate the mouth with it communicates with each other to melt a packing element and make the inner chamber of self and the inner chamber of crossing the rubber ring, the inner chamber internal diameter of penetrating the mouth is less than the internal diameter of crossing the rubber ring.

Further, the inner diameter of the front end opening of the nozzle is smaller than the inner diameter of the rear end opening of the nozzle.

Furthermore, penetrate mucilage binding and put still including cavity and both ends for the open mouth flange that penetrates, penetrate the mouth flange and be used for connecting penetrate the mouth with the melten gel section of thick bamboo makes penetrate the inner chamber of mouth flange with penetrate the inner chamber of mouth and communicate with each other, the inner chamber internal diameter that penetrates the mouth flange is greater than penetrate the inner chamber internal diameter of mouth and be less than cross the internal diameter of rubber ring.

Further, the inner diameter of the front end opening of the nozzle flange is smaller than the inner diameter of the rear end opening of the nozzle flange.

Further, the inner cavity of the nozzle flange and the inner cavity of the nozzle form the glue injection channel.

Compared with the prior art, the beneficial effects of the utility model reside in that:

when the melting glue injection device for the injection molding machine is used, in the melting glue process, the driving screw rotates to plasticize the material in the melting glue chamber, the plasticized material (melt) flows into the front end of the glue head through the rubber ring under the action of the screw and generates back pressure, and the screw is pushed to move backwards to complete the metering of the melt (the melt enters the metering chamber); after the melten gel is accomplished, the screw rod stops rotatoryly, promotes the screw rod and moves forward and penetrate and glue, at the in-process that penetrates to glue, because the pressure of measurement room is greater than the pressure of melten gel room and makes the rubber ring move backward and support and press and seal the indoor fuse-element entering measurement room of melten gel at the junction of gluing head and screw, thereby make the utility model discloses a melten gel injection apparatus can keep the weight stability of the indoor fuse-element of measurement when penetrating to glue, improves the injection precision of fuse-element, and then makes the weight and the size stability of goods, promotes the injection moulding precision of product.

Drawings

FIG. 1 is a schematic structural view of the molten glue injection device of the present invention;

FIG. 2 is a schematic view of a connection structure of a screw and a rubber ring according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a rubber ring according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a screw and a connecting member according to an embodiment of the present invention;

fig. 5 is a schematic view of the three-dimensional structure of the glue injection device of the present invention.

In the figure: 10. a melt adhesive cylinder; 101. passing through a glue head; 1011. a connecting member; 10111. a clamping part; 102. a feed inlet; 20. a screw; 30. passing through a rubber ring; 301. a U-shaped groove; 40. a nozzle flange; 401. a second injection channel; 41. shooting mouth; 411. a first injection channel.

Detailed Description

In the following, the present invention is described with priority in conjunction with the accompanying drawings and the detailed description, and it should be noted that, in the premise of no conflict, the embodiments or technical features described below may be arbitrarily combined to form a new embodiment.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "vertical", "top", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

The implementation mode is as follows:

as shown in fig. 1-5, the utility model discloses a melten gel injection apparatus for injection molding machine, including penetrating mucilage binding and putting and the melten gel device, the melten gel device includes melten gel section of thick bamboo 10, melten gel section of thick bamboo 10 embeds has the screw rod 20 rotatable and that can back-and-forth movement and makes and form the melten gel room between the inner wall of melten gel section of thick bamboo 10 and the screw rod 20, is provided with feed inlet 102 on the melten gel section of thick bamboo 10, treat that plasticized material enters into the melten gel from this feed inlet 102 indoor, the rear end of screw rod 20 is connected with drive arrangement (not shown), this drive arrangement is driving motor, driving motor is used for driving screw 20 rotatory. The glue injection device is connected with the front end of the glue melting cylinder 10 and is provided with a glue injection channel for injecting glue, the front end of the screw 20 is provided with a glue passing head 101, the glue passing head 101 forms a metering chamber with the glue injection channel along with the retreating of the screw 20 during glue melting, the glue passing head 101 is movably provided with a glue passing ring 30 which rotates along with the glue passing head, and the glue passing ring 30 moves backwards under the action of the pressure difference between the metering chamber and the glue melting chamber during glue injection and is abutted against the joint of the glue passing head 101 and the screw 20 so as to seal a melt in the glue melting chamber from entering the metering chamber.

The utility model discloses a melting glue injection apparatus for injection molding machine is when using, at the in-process of melting glue, the indoor material of plastify melting glue of the rotatory driving motor drive screw 20, because cross rubber ring 30 in the axial direction with cross the junction of rubber head 101 and screw rod 20 and have axial clearance, therefore plasticized material (fuse-element) gets into through rubber ring 30 and flows into the front end of crossing rubber head 101 and produce the backpressure (the material is given the resistance of screw rod 20 in by the plastify in-process) and promote screw rod 20 to move backward and make plasticized material (fuse-element) get into the measurement room through this axial clearance under the effect of screw rod 20; after the melten gel is accomplished, driving motor stops and makes screw rod 20 stop rotatory, promotes screw rod 20 forward movement this moment and penetrates gluey, at the in-process that penetrates gluey, the pressure of measurement room is greater than the pressure of melten gel room and makes to cross rubber ring 30 and move backward and support and press and seal the indoor fuse-element entering measurement room of melten gel in gluing head 101 and screw rod 20's junction, thereby make the utility model discloses a melten gel injection apparatus can keep the weight stability of the indoor fuse-element of measurement when penetrating gluey, improves the injection precision of fuse-element, and then makes the weight and the size stability of goods, promotes the injection moulding precision of product.

It should be noted that, since it is a known means in the art that the pressure in the metering chamber is higher than the pressure in the glue melting chamber during the glue injection operation, the transfer ring 30 can be moved backward by the pressure difference between the metering chamber and the glue melting chamber.

In this embodiment, the rubber passing head 101 is provided with a connecting piece 1011 along its radial direction, the outer wall of the rubber passing ring 30 is provided with a U-shaped groove 301 for the insertion of the connecting piece 1011, the U-shaped groove 301 is arranged on the outer wall of the rubber passing ring 30 and is communicated with its inner cavity, and in addition, the opening of the U-shaped groove 301 penetrates through the front end face of the rubber passing ring 30. That is, it can be understood that, in the glue melting process, the glue passing ring 30 rotates together with the glue passing head 101 under the clamping action of the U-shaped groove 301 and the connecting piece 1011; penetrate gluey in-process, utilize the measuring chamber with the pressure differential messenger of melten gel room cross rubber ring 30 backward move to press in crossing the junction of gluing head 101 and screw rod 20 to seal the indoor fuse-element of melten gel and get into the measuring chamber, thereby make the utility model discloses a melten gel injection apparatus can keep the indoor fuse-element of measuring stable in weight of penetrating when gluing, improves the injection precision of fuse-element, and then makes the weight and the size stability of goods, promotes the injection moulding precision of product.

In this embodiment, the U-shaped groove 301 is equipped with two, and relative setting is established in two U-shaped grooves 301, and connecting piece 1011 wears to locate to cross gluey head 101 in order to form two relative settings and respectively with the joint portion 10111 of each U-shaped groove 301 joint, so can further improve and cross gluey head 101 and drive the rotatory stability ability of rubber ring 30. Of course, the number of the U-shaped grooves 301 and the number of the locking portions 10111 may be changed according to the actual situation, and is not limited herein. Therefore, it is considered that those skilled in the art should also fall within the scope of the present invention by reasonably changing the number of the U-shaped grooves 301 and the clamping portions 10111.

It should be noted that, in the glue melting process, the glue passing ring 30 rotates together with the glue passing head 101 under the action of the U-shaped groove 301 and the clamping portion 10111, so that there is no relative friction, and damage to the glue passing head 101 is avoided.

In this embodiment, the contact surface of joint portion 10111 and U-shaped groove 301 sets up to spherical surface, and through this spherical surface and the contact of U-shaped groove 301, it is very little to have made the contact force of rubber ring 30 and U-shaped groove 301, so can the utility model discloses a molten rubber injection device is when penetrating the action of gluing, and the response of crossing rubber ring 30 is very rapid, has further improved the weight stability of the indoor fuse-element of measurement when penetrating the glue, has improved the injection precision of fuse-element.

It is worth to be noted that the two clamping portions 10111 are two ends of the clamping member, and the two ends of the clamping member are designed in a ball head manner and are matched with the rubber ring 30 in a slotting manner (matched with a wire), that is, the clamping portions 10111 and the U-shaped groove 301 are in contact with the wire, so as to avoid the risk of carbon deposition (the rubber material of the melt is yellow in a high-temperature state) caused by the material deposition phenomenon at the connecting position of the clamping member and the rubber ring 30, and thus avoid the bad situations that the injection molded product is yellow and black.

In addition, the two ends of the clamping piece are designed in a ball head mode, and the phenomenon that the clamping portion 10111 pulls the inner cavity of the glue melting cylinder 10 when glue melting acts can be avoided.

In this embodiment, cross rubber head 101 and screw rod 20 integrated into one piece, compare in traditional one end threaded connection structure of crossing rubber head 101 and screw rod 20, the utility model discloses a cross rubber head 101 and screw rod 20 integral type project organization can avoid crossing rubber head 101 because the twist-off under the big condition of the high drive torque of viscosity of raw materials, has solved simultaneously because crossing rubber head 101 and screw rod 20 and cause the problem that the assembly accumulative error leads to the fact the installation effectiveness to hang down through the combination of many parts.

In this embodiment, the injection device includes an injection nozzle 41 and an injection nozzle flange 40, the injection nozzle flange 40 is used for connecting the injection nozzle 41 and the glue melting cylinder 10, the injection nozzle 41 and the injection nozzle flange 40 are both hollow and have two open ends, and the inner cavity of the injection nozzle flange 40 is used for connecting the inner cavity of the injection nozzle 41 with the rubber ring 30. The inner cavity of the nozzle 41 is a first injection channel 411, the inner cavity of the nozzle flange 40 is a second injection channel 401, the inner diameter of the second injection channel 401 is larger than that of the first injection channel 411, and the first injection channel 411 and the second injection channel 401 form the above-mentioned glue injection channel. That is, it can be understood that, during the injection action, the melt in the metering chamber enters the first injection channel 411 from the second injection channel 401 under the pressing force of the head 101 and is finally injected into the mold. Because the melt enters the first injection channel 411 from the second injection channel 401, the inner diameter of the second injection channel 401 is designed to be larger than that of the first injection channel 411, so that the first injection channel 411 can be filled with the melt in the process of entering the first injection channel 411 from the second injection channel 401, and the glue injection efficiency is improved.

In addition, since the melt enters the second injection channel 401 through the rubber ring 30 and then enters the first injection channel 411, the inner diameter of the rubber ring 30 is designed to be larger than that of the second injection channel 401, so that the second injection channel 401 can be fully filled in the process of entering the second injection channel 401 from the rubber ring 30, and the injection efficiency is improved.

In this embodiment, the inner diameter of the front end opening of the nozzle 41 is smaller than the inner diameter of the rear end opening of the nozzle 41; the inner diameter of the front end opening of the nozzle flange 40 is smaller than the inner diameter of the rear end opening of the nozzle flange 40. It can be understood that the melt is ejected from the rear end opening of the nozzle flange 40, the second ejection channel 401, the rear end opening of the nozzle 41, the first ejection channel 411 to the front end of the nozzle 41 in sequence, so that the melt is ensured to be filled in the glue injection flow channel in the inflow process, the corrosion of the strong corrosive gas generated by the plastic melt to the glue injection device is weakened, and the corrosion resistance of the glue injection device is effectively improved.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims (10)

1. The utility model provides a melten gel injection apparatus for injection molding machine, is including penetrating mucilage binding and device and melten gel device, the melten gel device includes melten gel section of thick bamboo (10), penetrate the mucilage binding and be connected and be formed with the gluey passageway of penetrating that is used for penetrating gluey with the front end of melten gel section of thick bamboo (10), melten gel section of thick bamboo (10) embeds has rotatable and screw rod (20) that can move back and forth and makes melten gel chamber between melten gel section of thick bamboo (10) and screw rod (20), the front end of screw rod (20) is equipped with glues head (101), it forms the measurement room along with the backset of screw rod (20) and penetrate gluey passageway when the melten gel to cross gluey head (101), its characterized in that: the glue passing head (101) is movably provided with a glue passing ring (30) which rotates along with the glue passing ring, and the glue passing ring (30) moves backwards under the action of pressure difference between the metering chamber and the glue melting chamber during glue injection and is pressed against the joint of the glue passing head (101) and the screw (20) so as to seal the melt in the glue melting chamber from entering the metering chamber.

2. The melt adhesive injection device for an injection molding machine according to claim 1, characterized in that: cross rubber head (101) and be provided with connecting piece (1011) along self radial, cross and offer on rubber ring (30) and supply connecting piece (1011) male U-shaped groove (301), the opening of U-shaped groove (301) runs through cross the preceding terminal surface on rubber ring (30).

3. The melt adhesive injection device for an injection molding machine according to claim 2, characterized in that: u-shaped groove (301) are provided with two, two relative setting is established in U-shaped groove (301), connecting piece (1011) are worn to locate cross rubber head (101) in order to form double-phase relative setting and respectively with joint portion (10111) of each U-shaped groove (301) joint.

4. The melt adhesive injection device for an injection molding machine according to claim 3, characterized in that: the contact surface of the clamping portion (10111) and the U-shaped groove (301) is a spherical surface.

5. The melt adhesive injection device for an injection molding machine according to claim 1, characterized in that: the rubber coating head (101) and the screw rod (20) are integrally formed.

6. The melt adhesive injection device for an injection molding machine according to claim 1, characterized in that: penetrate mucilage binding and put including hollow and both ends for open penetrate mouth (41), penetrate mouth (41) with it communicates with each other to melt a gluey section of thick bamboo (10) and make the inner chamber of self and the inner chamber of crossing rubber ring (30), the inner chamber internal diameter of penetrating mouth (41) is less than the internal diameter of crossing rubber ring (30).

7. The melt adhesive injection device for an injection molding machine according to claim 6, wherein: the inner diameter of the front end opening of the nozzle (41) is smaller than the inner diameter of the rear end opening of the nozzle (41).

8. The melt injection device for injection molding machines according to claim 6 or 7, characterized in that: penetrate mucilage binding and put still including cavity and both ends for open mouth flange (40) of penetrating, penetrate mouth flange (40) and be used for connecting penetrate mouth (41) with melten gel section of thick bamboo (10) and make the inner chamber that penetrates mouth flange (40) with the inner chamber that penetrates mouth (41) communicates with each other, the inner chamber internal diameter that penetrates mouth flange (40) is greater than the inner chamber internal diameter that penetrates mouth (41) is less than cross the internal diameter of rubber ring (30).

9. The melt adhesive injection device for an injection molding machine according to claim 8, wherein: the inner diameter of the front end opening of the nozzle flange (40) is smaller than the inner diameter of the rear end opening of the nozzle flange (40).

10. The melt adhesive injection device for an injection molding machine according to claim 9, wherein: the inner cavity of the nozzle flange (40) and the inner cavity of the nozzle (41) form the glue injection channel.

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