Intelligent regulation and control device for rotating speed of screw of injection molding machine

Abstract

The utility model relates to the field of regulation and control devices, in particular to an injection molding machine screw rotating speed intelligent regulation and control device which comprises a base, a support is fixedly installed on the upper surface of the base, an outer shell is fixedly installed in the support, a machining cavity is formed in one side of the outer shell, a connecting screw is installed in the machining cavity in a clamped mode, and outer spiral blades are fixedly installed on the side wall of the connecting screw. An inner shaft is further included, a mounting hole is formed in the side wall of the connecting screw rod, and the inner shaft is clamped and mounted in the mounting hole. The intelligent regulation and control device for the rotating speed of the screw of the injection molding machine is provided with the connecting screw, the connecting screw comprises the screw a, when the rotating speed is increased, the connecting rod a and the connecting rod b are shrunk into the shrinking groove a and the shrinking groove b correspondingly, so that the screw pitch of the connecting screw is increased, the material retention time is shortened, shearing heat accumulation is reduced, and when the rotating speed is reduced, the connecting rod a and the connecting rod b stretch out; the screw pitch is reduced, so that the conveying pressure is enhanced, sol backflow is reduced, and the plasticizing uniformity is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of regulation and control device especially for intelligent regulation and control device of injection molding machine screw rotation speed. BACKGROUND

[0002] Injection molding machine is a kind of mechanical equipment for manufacturing plastic products, and is widely used in various industrial fields. It produces various shapes and sizes of plastic products by heating, melting thermoplastic or thermosetting plastic materials and injecting them into mold cavities under high pressure to form the final product. The screw of injection molding machine is one of its core components, responsible for the transformation of plastic raw materials from solid particles to molten state, and injecting them into the mold to form the final product. The role of screw covers multiple aspects, including material conveying, compression, melting, mixing and metering, etc. As the core equipment for manufacturing plastic products, injection molding machine has the advantages of high efficiency, high precision, diversified material application, etc., and plays an important role in many industries. It not only produces various shapes and sizes of plastic products, but also significantly improves production efficiency and product quality, reduces production cost, and injection molding machine screw speed regulation plays a crucial role in the manufacturing process of plastic products. There is a mutual dependence between screw speed and pitch, reasonable collocation can optimize the injection molding process, higher screw speed requires smaller pitch to ensure sufficient shear effect and melting uniformity; conversely, lower screw speed can be matched with larger pitch to improve conveying efficiency. For low viscosity materials, higher screw speed and smaller pitch can be selected to improve melting speed and mixing effect. For high viscosity materials, lower screw speed and larger pitch can be selected to reduce pressure loss and improve conveying capacity.

[0003] The Chinese patent with publication number CN222022136U discloses a screw drive structure for injection molding machine and injection molding machine, which realizes the effect of adjusting the screw speed by directly connecting the screw with the rotating shaft of the motor. However, when processing different materials, it is inconvenient to adjust the pitch according to the screw speed and material. Therefore, an intelligent regulation and control device for injection molding machine screw speed is provided. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide an intelligent regulation and control device for injection molding machine screw speed to solve the problem of inconvenient adjustment of pitch according to screw speed and material when processing different materials in related technology. Therefore, an intelligent regulation and control device for injection molding machine screw speed is provided.

[0005] In order to achieve the above object, according to one aspect of the utility model, an injection molding machine screw speed intelligent control device is provided, which comprises a base, a support is fixedly installed on the upper surface of the base, an outer shell body is fixedly installed in the support, a machining cavity is formed in one side of the outer shell body, a connecting screw is clamped and installed in the machining cavity, outer spiral vanes are fixedly installed on the side wall of the connecting screw, and further comprising: an inner shaft, mounting holes are formed in the side wall of the connecting screw, and the inner shaft is clamped and installed in the mounting holes.

[0006] Further, the connecting screw comprises at least a screw a, the screw a is fixedly installed on one side of a screw b, the screw b is fixedly installed on one side of a screw c, a gap groove is arranged between the screw a and the screw b, and similarly, the same gap groove is arranged between the screw b and the screw c, and the screw a, the screw b and the screw c are fixedly connected through the outer spiral vanes.

[0007] Further, a contraction groove a communicating with the mounting hole is formed in one side of the screw a, a contraction groove b communicating with the mounting hole is formed in one side of the screw b, the outer arc wall edge of the other side of the screw b is inclined towards the inside of the gap groove (36), an expansion groove is formed in one side of the screw c, and the outer arc wall side edge of the screw c is inclined towards the inside of the gap groove.

[0008] Further, a connecting rod b is fixedly installed on the arc wall near one side edge of the inner shaft, and a connecting rod a is fixedly installed on one side of the arc wall of the inner shaft.

[0009] Further, inner spiral vanes are fixedly installed on the outer arc wall of the connecting rod a, and the connecting rod b is the same in structure as the connecting rod a.

[0010] Further, an installation shell is fixedly installed on the upper surface of the base near one side edge, the connecting screw is rotatably installed in the installation shell, a motor is fixedly installed in the installation shell, and the output shaft of the motor is fixedly connected with one end of the connecting screw.

[0011] Further, a feeding groove is fixedly installed on the upper surface of the outer shell body, and a feeding port communicating with the machining cavity is formed in the upper surface of the feeding groove.

[0012] Further, a clamping groove communicating with the mounting hole is formed in the arc wall near one side edge of the connecting screw, a push plate is fixedly installed on the arc wall near one side edge of the inner shaft, and the push plate is clamped and installed in the clamping groove.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The intelligent control device for the rotation speed of the screw of the injection molding machine is provided with a connecting screw, the connecting screw comprises a screw a, a screw b and a screw c, the screw a, the screw b and the screw c are fixedly connected through outer spiral blades, the connecting screw is provided with a mounting hole, an inner shaft is connected and mounted in the mounting hole, the inner shaft is fixedly provided with a connecting rod a and a connecting rod b on the side wall, the connecting rod a is fixedly provided with an inner spiral blade on the arc wall, the connecting rod a and the connecting rod b are the same in structure, the connecting rod a is connected and mounted in the contraction groove a, the connecting rod b is connected and mounted in the contraction groove b, when the rotation speed is increased, the connecting rod a and the connecting rod b are respectively contracted into the contraction groove a and the contraction groove b, so that the pitch of the connecting screw is increased, thereby the material residence time is shortened, the shear heat accumulation is reduced, when the rotation speed is reduced, the connecting rod a and the connecting rod b are extended, so that the pitch is reduced, thereby the conveying pressure is enhanced, the sol backflow is reduced, and the plasticizing uniformity is improved.

[0015] 2. The intelligent control device for the rotation speed of the screw of the injection molding machine is provided with a mounting shell, one end of the connecting screw is rotatably mounted in the mounting shell, a motor is fixedly mounted in the mounting shell, the output shaft of the motor is fixedly connected with one end of the connecting screw, the motor provides power for the connecting screw to adjust the rotation speed of the connecting screw, the arc wall of the screw b and the screw c is provided with a round corner at the edge of the close side, so that the material is conveyed when the connecting rod a and the connecting rod b are extended, the inner shaft is slid by the sliding push plate, so that the positions of the connecting rod a and the connecting rod b are controlled. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the overall structure schematic view of the injection molding machine in the preferred embodiment of the utility model;

[0017] Figure 2 It is the structure schematic view of the injection molding mechanism in the preferred embodiment of the utility model;

[0018] Figure 3 It is the structure schematic view of the connecting screw in the preferred embodiment of the utility model;

[0019] Figure 4 It is the structure schematic view of the connecting screw in the preferred embodiment of the utility model;

[0020] Figure 5 It is the structure schematic view of the outer shell in the preferred embodiment of the utility model;

[0021] Figure 6 It is the structure schematic view of the connecting screw in the preferred embodiment of the utility model;

[0022] Figure 7 It is the structure schematic view of the inner shaft in the preferred embodiment of the utility model;

[0023] Figure 8 It is the structure schematic view of the connecting screw in the preferred embodiment of the utility model.

[0024] ILLUSTRATION:

[0025] 1, base; 11, mounting shell; 12, support;

[0026] 2, outer shell; 21, processing cavity; 22, feeding slot; 221, feeding port;

[0027] 3, connecting screw; 31, screw a; 32, screw b; 33, screw c; 34, outer spiral blade; 35, mounting hole; 36, gap slot; 311, contraction slot a; 321, contraction slot b; 331, expansion slot; 351, clamping slot;

[0028] 4, inner shaft; 41, push plate; 42, connecting rod a; 43, connecting rod b; 421, inner spiral blade. DETAILED DESCRIPTION

[0029] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the specific embodiments, structures, features and effects according to the utility model are described in detail as follows in combination with the drawings and preferred embodiments.

[0030] Please refer to Figures 1-8 The embodiment is aimed at providing an intelligent control device for the rotation speed of the screw of an injection molding machine, which comprises a base 1, a support 12 fixedly installed on the upper surface of the base 1, an outer shell 2 fixedly installed in the support 12, a processing cavity 21 formed in one side of the outer shell 2, a connecting screw 3 clamped and installed in the processing cavity 21, and an outer spiral blade 34 fixedly installed on the side wall of the connecting screw 3. The device further comprises an inner shaft 4, a mounting hole 35 formed in the side wall of the connecting screw 3, and the inner shaft 4 clamped and installed in the mounting hole 35. The connecting screw 3 is used to transport, compress and melt the material in the processing cavity 21. The rotary motion of the connecting screw 3 makes the material in the screw groove experience shear deformation, generates shear heat, and promotes the melting of the material.

[0031] The connecting screw rod 3 at least comprises a screw rod a31, the screw rod a31 is fixedly installed with a screw rod b32 on one side, the screw rod b32 is fixedly installed with a screw rod c33 on one side, a gap groove 36 is arranged between the screw rod a31 and the screw rod b32, and the same gap groove 36 is arranged between the screw rod b32 and the screw rod c33. The screw rod a31, the screw rod b32 and the screw rod c33 are fixedly connected through an outer spiral blade 34. The gap groove 36 interrupts the continuous spiral flow path, forcing the material to recombine the flow lines when passing through the gap, forming additional shearing and stretching effects. This non-uniform flow field helps to disperse and distribute mixing. The sudden change in cross-sectional area at the gap may induce local vortex flow, prolong the residence time of the material, and promote the interface interaction of multi-phase components. In the multi-stage design, the gap groove 36 can be used as a “reset point” for thermodynamic state. The incompletely melted material in the front stage experiences a short pressure release at the gap, and the screw rod in the subsequent stage can avoid local overheating or uneven melting by re-pressing and shearing. The gap groove 36 can reduce the accumulation of viscous dissipation heat caused by continuous shearing, which is particularly important for heat-sensitive materials, reducing the risk of degradation. The gap groove 36 can partially absorb the pressure pulsation generated by the front-stage screw rod, reduce the outlet pressure fluctuation, improve the extrusion stability, especially in high-speed or high-viscosity working conditions.

[0032] The screw rod a31 is provided with a contraction groove a311 with a communication installation hole 35 on one side, the screw rod b32 is provided with a contraction groove b321 with a communication installation hole 35 on one side, the other side of the screw rod b32 is provided with a round corner on the edge of the outer arc wall, the screw rod c33 is provided with an expansion groove 331 on one side, the screw rod c33 is provided with a round corner on the edge of the outer arc wall on one side, the inner shaft 4 is inserted into the expansion groove 331, and the round corners on one side of the screw rod b32 and the screw rod c33 facilitate the conveying of materials.

[0033] The inner shaft 4 is fixedly installed with a connecting rod b43 on the edge of the arc wall on one side, and the inner shaft 4 is fixedly installed with a connecting rod a42 on the side of the arc wall of the connecting rod b43. Without reducing the pitch of the connecting screw rod 3, the connecting rod a42 is clamped and installed in the contraction groove a311, and the connecting rod b43 is clamped and installed in the contraction groove b321.

[0034] The outer arc wall of the connecting rod a42 is fixedly installed with the inner spiral blade 421, the connecting rod b43 is the same as the connecting rod a42 in structure, when the rotating speed of the connecting screw rod 3 is reduced, the connecting rod a42 and the connecting rod b43 are pushed out by the push plate 41, the inner spiral blade 421 and the outer spiral blade 34 are combined to reduce the pitch, thereby enhancing the conveying pressure, reducing the molten glue backflow and improving the plasticizing uniformity, when the rotating speed of the connecting screw rod 3 is increased, the connecting rod a42 and the connecting rod b43 are respectively retracted into the retraction groove a311 and the retraction groove b321 by the push plate 41, so as to increase the pitch of the connecting screw rod 3, thereby improving the conveying efficiency, shortening the material residence time and reducing the shear heat accumulation, wherein the inner spiral blade 421 fills the invalid conveying area at the gap groove 36, avoids the reverse backflow of the material due to the pressure difference, ensures the stability of the overall mass flow, and realizes the smooth transition of the flow field between the segments by optimizing the lead and the rotation direction of the inner spiral blade 421, thereby reducing the pressure loss. The gap between the inner spiral blade 421 and the cylinder is smaller, forming a high shear zone, and the secondary dispersion is carried out on the agglomerates (such as nano fillers) that are not fully broken in the front section, the agitation of the inner spiral blade 421 enhances the heat conduction inside the melt, and the local temperature drop caused by the expansion of the gap groove 36 is alleviated.

[0035] The bottom surface of the base 1 is fixedly installed with the mounting shell 11 near one side edge, one end of the connecting screw rod 3 is rotatably installed in the mounting shell 11, the mounting shell 11 is fixedly installed with the motor, the output shaft of the motor is fixedly connected with one end of the connecting screw rod 3, and the motor provides power for the rotation of the connecting screw rod 3.

[0036] The upper surface of the outer shell 2 is fixedly installed with the feeding groove 22, the upper surface of the feeding groove 22 is penetrated to form the feeding port 221 communicated with the processing cavity 21, and the materials are added from the feeding port 221.

[0037] The arc wall of the connecting screw rod 3 is penetrated to form the clamping groove 351 communicated with the mounting hole 35 near one side edge, the arc wall of the inner shaft 4 is fixedly installed with the push plate 41 near one side edge, the push plate 41 is clamped and installed in the clamping groove 351, the mounting hole 35 is fixedly installed with the air cylinder, one end of the piston rod of the air cylinder is fixedly connected with one side of the inner shaft 4, the air cylinder pushes the inner shaft 4 to drive the inner shaft 4 to slide, thereby adjusting the positions of the connecting rod a42 and the connecting rod b43, and adjusting the pitch according to the rotating speed.

[0038] The utility model discloses in specific use, need to adjust screw pitch to screw rod when, when motor drive connection screw rod 3 rotation speed promotes, sliding push plate 41 with drive inner shaft 4 sliding, make connecting rod a 42 contract to contract groove a 311, connecting rod b 43 contract to contract groove b 321, with increase the pitch of connecting screw rod 3, with low viscosity material, promote conveying efficiency, shorten the residence time of material in processing cavity 21, reduce shearing heat accumulation, connecting screw rod 3 rotation speed reduces, through sliding push plate 41 with drive inner shaft 4 sliding, connecting rod a 42 extend to contract groove a 311 outside, connecting rod b 43 extend to contract groove b 321 outside, with reduce the pitch of connecting screw rod 3, suitable for processing high viscosity material, with enhance conveying pressure, reduce molten glue reflux, improve plasticization uniformity.

[0039] The above is only the preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as above with the preferred embodiment, it is not intended to limit the utility model. Any person skilled in the art can make some changes or modifications to the equivalent embodiments within the scope of the utility model without departing from the technical scheme of the utility model. Any modification, equivalent change and modification of the above embodiment, which does not depart from the technical scheme of the utility model, still belongs to the scope of the utility model.

Claims

1. An intelligent control device for the rotation speed of the screw of an injection molding machine, comprising a base (1), characterized in that, The base (1) upper surface is fixedly installed with a support (12), the support (12) is fixedly installed with a shell (2), the shell (2) is provided with a processing cavity (21) on one side, the processing cavity (21) is connected with a connecting screw (3), the connecting screw (3) is fixedly installed with an outer spiral blade (34), and the connecting screw (3) further comprises: The inner shaft (4) is connected with the connecting screw (3) and is fixedly installed with an inner shaft (4).

2. The intelligent control device for the rotation speed of the injection molding machine screw according to claim 1, characterized in that, The connecting screw (3) comprises a screw a (31), the screw a (31) is fixedly installed with a screw b (32) on one side, the screw b (32) is fixedly installed with a screw c (33) on one side, and the screw a (31) and the screw b (32) are provided with a gap groove (36).

3. The intelligent control device for the rotation speed of the injection molding machine screw according to claim 2, characterized in that, The screw a (31) is provided with a contraction groove a (311) connected with the installation hole (35) on one side, the screw b (32) is provided with a contraction groove b (321) connected with the installation hole (35) on one side, and the other side of the screw b (32) is inclined to the gap groove (36).

4. The intelligent control device for the rotation speed of the injection molding machine screw according to claim 1, characterized in that, The inner shaft (4) is fixedly installed with a connecting rod b (43) on one side of the arc wall, and the arc wall of the inner shaft (4) is fixedly installed with a connecting rod a (42) on one side of the connecting rod b (43).

5. The intelligent control device for the rotation speed of the injection molding machine screw according to claim 4, characterized in that, The connecting rod a (42) is fixedly installed with an inner spiral blade (421) on the outer arc wall, and the connecting rod b (43) is the same as the connecting rod a (42).

6. The intelligent control device for the rotation speed of the injection molding machine screw according to claim 1, characterized in that, The base (1) upper surface is fixedly installed with an installation shell (11) on one side edge, and the connecting screw (3) is rotatably installed in the installation shell (11); the installation shell (11) is fixedly installed with a motor, and the output shaft of the motor is fixedly connected with one end of the connecting screw (3).

7. The intelligent control device for injection molding machine screw speed according to claim 1, characterized in that, The upper surface of the shell (2) is fixedly installed with a feeding groove (22), and the upper surface of the feeding groove (22) is provided with a feeding port (221) connected with the processing cavity (21).

8. The intelligent control device for the rotation speed of the injection molding machine screw according to claim 1, characterized in that, The arc wall of the connecting screw (3) is provided with a clamping groove (351) connected with the installation hole (35) on one side edge, and the arc wall of the inner shaft (4) is fixedly installed with a push plate (41) on one side edge.

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