Injection device for a rubber injection molding machine

Abstract

The present application relates to the technical fields of rubber injection molding machine, specifically to the injection device of rubber injection molding machine, including injection molding machine, the top of injection molding machine is fixedly connected with feeding mechanism, the injection molding machine includes outer shell, the right side of outer shell is fixedly connected with distribution box, the front side of distribution box is fixedly connected with control panel, the front side of outer shell is fixedly connected with top die pressing plate, the top of outer shell front side is movably connected with injection nozzle, the bottom of outer shell front side is fixedly connected with injection support, the top of injection support is movably connected with bottom die, by setting injection molding machine and feeding mechanism, double barrel alternating material supply is realized, the problem of single barrel injection pressure being too large when forming large size thick wall rubber products is effectively solved, single barrel and screw do not need high strength custom design, the overall structural strength requirement of equipment is reduced and manufacturing cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of rubber injection molding machine technology, and more specifically, to the injection device of a rubber injection molding machine. Background Technology

[0002] Rubber injection molding refers to a production method in which rubber material is directly injected from the barrel into a mold for vulcanization. Compared with traditional calendering and extrusion molding processes, rubber injection molding has higher precision and production efficiency when producing rubber products with complex shapes. The injection unit is the core structure of the rubber injection molding machine. It is mainly responsible for preheating and plasticizing the rubber material and injecting a certain amount of rubber material into the mold cavity according to the set pressure and speed. After injection, it is also necessary to maintain a certain holding pressure on the rubber material in the mold to prevent backflow of the rubber material and ensure the dimensional accuracy and structural density of the final molded product.

[0003] According to patent document CN112157864A, a rubber injection molding machine and molding method are disclosed, including a machine base, a mold opening and closing device, a fixed mold, and a moving mold. The moving mold is equipped with a vacuuming device, a central injection port, and an edge injection port. The mold opening and closing device is equipped with an injection device, which includes a central injection mechanism and an edge injection mechanism. The central injection mechanism is connected to the central injection port, and the edge injection mechanism is connected to the edge injection port. The rubber injection molding machine provided by this invention, especially for large-volume rubber injection, locks the moving mold and the fixed mold together and then evacuates the mold cavity. The material is first injected through the edge injection port and then through the central injection port. This design requires low injection force, a simple structure, a small footprint, and low cost.

[0004] When injection molding products, rubber is typically injected into a barrel, where a screw conveys, shears, and plasticizes the rubber. After plasticization, a fixed amount of molten rubber is injected into the mold cavity by the thrust of the screw. Existing conventional single-injection mechanism designs often require a large amount of rubber to be injected into the mold cavity when molding large-sized, thick-walled rubber products. However, injection machines usually only provide injection power through a single barrel, which may cause the single barrel and screw to withstand greater injection pressure, requiring higher structural strength from the screw and barrel, and increasing the overall manufacturing cost of the equipment. At the same time, when injecting a large amount of rubber in a single injection, it is easier for defects such as pores and material shortages to occur inside the product due to excessively long rubber flow distance and uneven filling. It can also cause the temperature of the rubber at the injection end to drop, affecting the cross-linking molding effect. Summary of the Invention

[0005] To overcome the aforementioned deficiencies of the prior art, the present invention provides an injection device for a rubber injection molding machine. The technical problem to be solved by the present invention is that when molding large-sized, thick-walled rubber products, a large amount of rubber is often required to be injected into the mold cavity. However, injection machines usually only provide injection power through a single barrel, which may cause the single barrel and screw to have to withstand greater injection pressure, requiring higher structural strength of the screw and barrel, and increasing the overall manufacturing cost of the equipment. At the same time, when injecting a large amount of rubber at a time, it is easier for defects such as pores and material shortages to occur inside the product due to excessively long rubber flow distance and uneven filling. It can also cause the temperature of the rubber at the injection end to drop, affecting the cross-linking molding effect.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] The injection device of a rubber injection molding machine includes an injection molding machine, wherein a feeding mechanism is fixedly connected to the top of the injection molding machine.

[0008] The injection molding machine includes an outer shell, a power distribution box is fixedly connected to the right side of the outer shell, a control panel is fixedly connected to the front side of the power distribution box, a top mold plate is fixedly connected to the front side of the outer shell, an injection nozzle is movably connected to the top of the front side of the outer shell, an injection support is fixedly connected to the bottom of the front side of the outer shell, and a bottom mold is movably connected to the top of the injection support.

[0009] The feeding mechanism includes a feeding frame, and a circulating feeding component is fixedly connected to the front side of the top of the feeding frame.

[0010] As a further embodiment of the present invention: the feeding rack includes an inverted concave plate, a storage box is fixedly connected to the rear side of the inverted concave plate, a main injection pipe connecting plate is fixedly connected to the middle of the front side of the inverted concave plate, side L-shaped stabilizing blocks are fixedly connected to both the left and right sides of the main injection pipe connecting plate, a main injection pipe is fixedly connected to the middle of the front side of the main injection pipe connecting plate, and the inner sides of the two inverted concave plates are fixedly connected to the top of the left and right sides of the outer shell.

[0011] As a further aspect of the present invention: the circulating feeding assembly includes two feeding frames, and a feeding control frame is fixedly connected to the rear side of the bottom of each of the two feeding frames.

[0012] As a further embodiment of the present invention: both of the feeding frames include side plates, the top of the outer side of both side plates is provided with a sliding groove, the middle of the outer side of both side plates is fixedly connected with a guide rail rod, the bottom of the outer side of both side plates is provided with an abutment groove, the front side of the inner side of both side plates is fixedly connected with a side concave block, the front side of the outer side of both side concave blocks is fixedly connected with a front connecting rod, the front side of the bottom of both side concave blocks is fixedly connected with a bottom support plate, and the front side of the bottom of both bottom support plates is fixedly connected to both sides of the top of the main injection pipe connecting plate.

[0013] As a further embodiment of the present invention: a sliding rod is slidably connected to the rear side of the inner wall of the sliding groove opened in the two side plates; a connecting block is fixedly connected to the inner end of each of the two sliding rods; a rectangular sliding groove side block is fixedly connected to the outer end of each of the two rectangular sliding groove side blocks; a rectangular slider is slidably connected to the rear side of the bottom inner side of each of the two rectangular sliders; and the outer walls of the two rectangular slider abutments are slidably connected to the inner walls of the two guide rails opened at the bottom of the two side plates.

[0014] As a further aspect of the present invention: a material cylinder connecting block is fixedly connected to the front side of the inner top of each of the two rectangular sliders, a material cylinder is fixedly connected to the outer side of each of the two material cylinder connecting blocks, a pipe is fixedly connected to the top of each of the two material cylinders, and the ends of the two pipes away from the material cylinders are fixedly connected to the two sides of the top of the storage box.

[0015] As a further embodiment of the present invention: a servo motor is fixedly connected to the top rear side of the outer side of the right side plate; transmission disks are rotatably connected to the front and rear sides of the top inner sides of both side plates; tracks are fitted onto the outer walls of the left and right sets of transmission disks; a connecting block is fixedly connected to the top front inner side of the right side plate; a second conical tooth is rotatably connected to the rear side of the connecting block; a conical tooth is fixedly connected to the left side of the transmission disk rotatably connected to the top front side of the right side plate; the outer wall of the conical tooth meshes with the outer wall of the second conical tooth; and a third conical tooth meshes with the left side of the outer wall of the second conical tooth.

[0016] As a further embodiment of the present invention: a columnar transverse transmission rod is fixedly connected to the left side of the third conical tooth, the left end of the columnar transverse transmission rod is fixedly connected to the inner side of the right front transmission disc, and the rear sides of the tops of the two tracks are fixedly connected to the bottom of the two connecting blocks.

[0017] As a further embodiment of the present invention: both of the material control frames include L-shaped sleeves, the tops of the two L-shaped sleeves are fixedly connected to the rear sides of the bottom of the two side plates, the inner walls of the two L-shaped sleeves are slidably connected to columnar rods, the front sides of the two L-shaped sleeves are fixedly connected to guide blocks, the outer walls of the two guide blocks are slidably connected to C-shaped sliders, the rear sides of the two C-shaped sliders are fixedly connected to the front ends of the two columnar rods, the rear ends of the two columnar rods are fixedly connected to vertical push-pull plates, the tops of the front sides of the two vertical push-pull plates are fixedly connected to horizontal L-shaped push-pull rods, the bottom front sides of the two horizontal L-shaped push-pull rods are fixedly connected to the tops of the two connecting blocks, the middle of the rear sides of the two C-shaped sliders are fixedly connected to springs, and the rear ends of the two springs are fixedly connected to the front sides of the two L-shaped sleeves.

[0018] As a further embodiment of the present invention: Arc-shaped pull rods are rotatably connected to the top and bottom of both C-shaped sliders; L-shaped hinge blocks are fixedly connected to the front sides of the top and bottom of both guide blocks; C-shaped rotating blocks are rotatably connected to the inner sides of the left and right sets of L-shaped hinge blocks; the outer sides of the top and bottom of the left and right sets of C-shaped rotating blocks are rotatably connected to the inner sides of the left and right sets of arc-shaped pull rods away from the C-shaped sliders; Y-shaped adapter rods are rotatably connected to the outer sides of the left and right sets of C-shaped rotating blocks; L-shaped swing blocks are rotatably connected to the front sides of the left and right sets of Y-shaped adapter rods; and bidirectional hinge blocks are rotatably connected to the rear sides of the outer walls of the left and right sets of L-shaped swing blocks. The inner sides of the hinge blocks are rotatably connected to the front sides of the inner sides of the two sets of C-shaped rotating blocks on the left and right. The front sides of the inner sides of the two sets of L-shaped swing blocks on the left and right are fixedly connected to arc-shaped swing rods. The front sides of the inner sides of the two sets of arc-shaped swing rods on the left and right are fixedly connected to semi-circular vertical plates. The bottom of the outer sides of the two semi-circular vertical plates are fixedly connected to horizontal Y-shaped sleeve blocks. The bottom of the two horizontal Y-shaped sleeve blocks is fixedly connected to a discharge head. The bottom of the two discharge heads is fixedly connected to a second pipe. The ends of the two second pipes away from the discharge heads are fixedly connected to the top of the main injection pipe. The bottom sides of the two L-shaped hinge blocks at the bottom are fixedly connected to bottom blocks. The bottom of the two sets of bottom blocks is fixedly connected to a support box.

[0019] The beneficial effects of this invention are as follows:

[0020] This invention, by setting up an injection molding machine and a feeding mechanism, realizes the alternating feeding of two material cylinders, which effectively solves the problem of excessive injection pressure of a single material cylinder when molding large-sized thick-walled rubber products. It eliminates the need for high-strength customized design of individual material cylinders and screws, reducing the overall structural strength requirements and manufacturing costs of the equipment.

[0021] By alternately feeding material into the main injection tube in batches through dual material cylinders, and then injecting it into the mold cavity through the main injection tube, the flow distance of the rubber material in a single injection is shortened, which effectively avoids the problem of uneven filling of rubber material caused by a single large-dose injection. This reduces the probability of molding defects such as pores and material shortages inside the product. At the same time, it avoids the problem of the temperature drop of the rubber material at the injection end affecting the cross-linking molding effect, which effectively improves the molding quality and molding qualification rate of large-size thick-walled rubber products.

[0022] Two material cylinders can be synchronously driven by a single servo motor to complete the feeding and discharging head splicing control. The dual material alternating feeding action can be realized with only one set of drive mechanism, which optimizes the overall drive structure of the equipment, reduces the layout cost and control error of multiple drive components, and improves the synchronization and stability of dual material feeding action.

[0023] With the splicing and opening design of the two discharge heads, they are connected to form a complete discharge path only when a single barrel is being injected. After the injection is completed, the discharge path is automatically separated and disconnected, which effectively avoids the problem of raw material leakage during the injection gap, improves the accuracy of raw material metering, reduces raw material waste, ensures the accuracy of the quantitative supply of rubber material for each injection, and thus improves the molding dimensional accuracy of rubber products.

[0024] The automatic opening and closing of the discharge head is achieved through a spring-energy storage and reset structure in conjunction with a transmission mechanism, eliminating the need for additional opening and closing drive components. This further simplifies the equipment structure, reduces energy consumption and control complexity, improves the reliability of equipment operation, and lowers maintenance costs. The alternating cyclic feeding and centralized injection molding method can meet the injection requirements of large-dose rubber materials while ensuring the continuity and stability of the injection process. It balances the production efficiency and product quality of large-size thick-walled rubber products and is suitable for the molding and processing needs of various specifications of large-size thick-walled rubber products, making it more adaptable and practical. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the main three-dimensional structure of the present invention;

[0026] Figure 2 This is a three-dimensional structural diagram of the injection molding machine of the present invention;

[0027] Figure 3 This is a three-dimensional structural diagram of the feeding mechanism of the present invention;

[0028] Figure 4 This is a three-dimensional structural diagram of the feeding rack of the present invention;

[0029] Figure 5 This is a three-dimensional structural diagram of the circulating feeding component of the present invention;

[0030] Figure 6This is a schematic diagram of the three-dimensional separation structure of the circulating feeding component of the present invention;

[0031] Figure 7 This is a schematic diagram of the three-dimensional separation structure of the feeding frame of the present invention;

[0032] Figure 8 For the present invention Figure 7 Enlarged structural diagram at point A in the middle;

[0033] Figure 9 This is a three-dimensional structural diagram of the feeding frame of the present invention;

[0034] Figure 10 This is a schematic diagram of the three-dimensional separation structure of a single feed control frame according to the present invention.

[0035] In the diagram: 1. Injection molding machine; 11. Outer casing; 12. Electrical control box; 13. Control panel; 14. Injection nozzle; 15. Top mold plate; 16. Bottom mold; 17. Injection support platform; 2. Feeding mechanism; 21. Feeding rack; 211. Inverted concave plate; 212. Main injection pipe connecting plate; 213. Side L-shaped stabilizing block; 214. Main injection pipe; 215. Storage bin; 22. Circulating feeding assembly; 221. Feeding frame; 2211 2211 Side plate; 2212 Slide groove; 2213 Abutment groove; 2214 Guide rail rod; 2215 Side concave block; 2216 Front connecting rod; 2217 Bottom support upright plate; 2218 Connecting block; 2219 Slide rod; 22110 Rectangular slide groove side block; 22111 Material cylinder; 22112 Rectangular slider; 22113 Rectangular slider abutment rod; 22114 Material cylinder connecting block; 22115 Pipe; 22116 Engagement plate 22117. Connecting block; 22118. Servo motor; 22119. Transmission disc; 22110. Track; 22120. Conical tooth; 22121. Second conical tooth; 22122. Third conical tooth; 22123. Columnar transverse transmission rod; 222. Material handling control frame; 2221. L-shaped sleeve block; 2222. Guide block; 2223. C-shaped slider; 2224. Columnar rod; 2225. Vertical push-pull plate; 2226. Horizontal L-shaped push-pull rod; 2227. Spring; 2228. L-shaped hinge block; 2229. C-shaped rotating block; 22210. Two-way hinge block; 22211. Arc-shaped tie rod; 22212. L-shaped swing block; 22213. Y-shaped adapter rod; 22214. Arc-shaped swing rod; 22215. Semi-circular vertical plate; 22216. Base block; 22217. Pallet; 22218. Horizontal Y-shaped sleeve block; 22219. Discharge head; 22220. Second pipe. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] like Figure 1 As shown, the present invention provides an injection device for a rubber injection molding machine, including an injection molding machine 1, and a feeding mechanism 2 is fixedly connected to the top of the injection molding machine 1.

[0038] like Figure 3-10As shown, the feeding mechanism 2 includes a feeding rack 21. A circulating feeding assembly 22 is fixedly connected to the front side of the top of the feeding rack 21. The feeding rack 21 includes an inverted concave plate 211. A storage box 215 is fixedly connected to the rear side of the inverted concave plate 211. A main injection pipe connecting plate 212 is fixedly connected to the middle of the front side of the inverted concave plate 211. Side L-shaped stabilizing blocks 213 are fixedly connected to both sides of the main injection pipe connecting plate 212. A main injection pipe 214 is fixedly connected to the middle of the front side of the main injection pipe connecting plate 212. The inner sides of the two inverted concave plates 211 are fixedly connected to the top of the left and right sides of the outer shell 11. The circulating feeding assembly 22 includes two feeding frames 221. A material passage control frame 222 is fixedly connected to the rear side of the bottom of the two feeding frames 221. Each feeding frame 221 includes side plates 2211. The top of the outer sides of both side plates 2211 is provided with a sliding groove 2212. A guide rail rod 2214 is fixedly connected to the middle of the outer sides of both side plates 2211. A notch 2213 is provided at the bottom of the outer sides of both side plates 2211. A concave side block 2215 is fixedly connected to the front of the inner side of both side plates 2211. A front connecting rod 2216 is fixedly connected to the front of the outer side of both concave side blocks 2215. A bottom support plate 2217 is fixedly connected to the front of the bottom of both concave side blocks 2215. The front of the bottom of both bottom support plates 2217 is fixedly connected to both sides of the top of the main feeding pipe connecting plate 212. The rear of the inner wall of the sliding groove 2212 provided in the two side plates 2211 is slidably connected to... There are two sliding rods 2219. The inner ends of both sliding rods 2219 are fixedly connected to connecting blocks 2218. The outer ends of both sliding rods 2219 are fixedly connected to rectangular sliding groove side blocks 22110. Rectangular sliders 22112 are slidably connected to the outer sides of both rectangular sliding groove side blocks 22110. Rectangular slider abutments 22113 are fixedly connected to the rear sides of the inner bottom of both rectangular sliders 22112. The outer walls of both rectangular slider abutments 22113 are slidably connected to the inner walls of two guide rails 2214 opened at the bottom of the two side plates 2211. A material cylinder connecting block 22114 is fixedly connected to the front side of the inner top of both rectangular sliders 22112. A material cylinder 22111 is fixedly connected to the outer side of both material cylinder connecting blocks 22114. The top of each of the two side plates 22111 is fixedly connected to a pipe 22115. The ends of the two pipes 22115 away from the material cylinder 22111 are fixedly connected to the top of the storage box 215 on both sides. A servo motor 22117 is fixedly connected to the top rear side of the outer side of the right side plate 2211. The front and rear sides of the top inner sides of both side plates 22111 are rotatably connected to a transmission disc 22118. The outer walls of the two sets of transmission discs 22118 are fitted with tracks 22119. A connecting block 22116 is fixedly connected to the top front inner side of the right side plate 22111. A second conical tooth 22121 is rotatably connected to the rear side of the connecting block 22116. A conical tooth 22120 is fixedly connected to the left side of the transmission disc 22118 rotatably connected to the top front side of the right side plate 22111.The outer wall of the conical tooth 22120 meshes with the outer wall of the second conical tooth 22121. A third conical tooth 22122 meshes with the left side of the outer wall of the second conical tooth 22121. A columnar transverse transmission rod 22123 is fixedly connected to the left side of the third conical tooth 22122. The left end of the columnar transverse transmission rod 22123 is fixedly connected to the inner side of the right front transmission disc 22118. The rear sides of the tops of both tracks 22119 are fixedly connected to the bottoms of two connecting blocks 2218. Both material handling control frames 222 include L-shaped sleeves 2221. The tops of both L-shaped sleeves 2221 are fixedly connected to the rear sides of the bottoms of two side plates 2211. A columnar rod 2224 is slidably connected to the inner walls of both L-shaped sleeves 2221. Guide blocks 2222 are fixedly connected to the front side of each of the two guide blocks 2222. C-shaped sliders 2223 are slidably connected to the outer walls of each guide block 2222. The rear sides of each of the two C-shaped sliders 2223 are fixedly connected to the front ends of each of the two columnar rods 2224. Vertical push-pull plates 2225 are fixedly connected to the rear ends of each of the two columnar rods 2224. Horizontal L-shaped push-pull rods 2226 are fixedly connected to the top front of each of the two vertical push-pull plates 2225. The bottom front sides of each of the two horizontal L-shaped push-pull rods 2226 are fixedly connected to the top of each of the two connecting blocks 2218. Springs 2227 are fixedly connected to the middle rear side of each of the two C-shaped sliders 2223. The rear ends of each of the two springs 2227 are fixedly connected to the front of each of the two L-shaped sleeves 2221. The tops of the two C-shaped sliders 2223 are connected to... The bottom is rotatably connected to an arc-shaped pull rod 22211. The top and front sides of the two guide blocks 2222 are fixedly connected to L-shaped hinge blocks 2228. The inner sides of the left and right sets of L-shaped hinge blocks 2228 are rotatably connected to C-shaped rotating blocks 2229. The top and outer sides of the left and right sets of C-shaped rotating blocks 2229 are rotatably connected to the inner side of the left and right sets of arc-shaped pull rods 22211, away from the C-shaped slider 2223. The outer sides of the left and right sets of C-shaped rotating blocks 2229 are rotatably connected to Y-shaped adapter rods 22213. The front sides of the left and right sets of Y-shaped adapter rods 22213 are rotatably connected to L-shaped swing blocks 22212. The rear sides of the outer walls of the left and right sets of L-shaped swing blocks 22212 are rotatably connected to bidirectional hinge blocks 22210. The inner sides of both sets of bidirectional hinge blocks 22210 are rotatably connected to the front sides of the inner sides of the left and right sets of C-shaped rotating blocks 2229. The front sides of the inner sides of the left and right sets of L-shaped swing blocks 22212 are all fixedly connected to arc-shaped swing rods 22214. The front sides of the inner sides of the left and right sets of arc-shaped swing rods 22214 are all fixedly connected to semi-circular vertical plates 22215. The bottom outer sides of the two semi-circular vertical plates 22215 are all fixedly connected to horizontal Y-shaped sleeve blocks 22218. The bottom of the two horizontal Y-shaped sleeve blocks 22218 is all fixedly connected to discharge heads 22219. The bottom of the two discharge heads 22219 is all fixedly connected to second pipes 22220. The ends of the two second pipes 22220 furthest from the discharge heads 22219 are all fixedly connected to the top of the main injection pipe 214.Both sides of the bottom of the two L-shaped hinge blocks 2228 are fixedly connected to bottom blocks 22216, and the bottoms of the two sets of bottom blocks 22216 are fixedly connected to trays 22217;

[0039] When rubber injection molding is required, firstly, two material cylinders 22111 are drawn into the rubber raw material feed cylinder 22111 from the storage box 215 through two pipes 22115 for hot melting. Then, the servo motor 22117 is started, which drives the rear transmission disk 22118 connected to the right side plate to rotate. The front transmission disk rotates synchronously through the track 22119. At the same time, the conical teeth 22120 connected to the transmission disk drives the second conical teeth 22121 to rotate. Then, the third conical teeth 22122 and the columnar transverse transmission rod 22123 drive the left track 22119 to rotate synchronously, so that the two tracks 22119 rotate at the same time. The two tracks 22119 rotate in opposite directions. When the servo motor 22117 controls the right rear transmission disk 22118 to rotate clockwise, the right track 22119 rotates clockwise and the left track 22119 rotates counterclockwise.

[0040] The right track 22119 drives its connected connecting block 2218 to slide forward along the slide groove 2212, while the left track 22119 drives its connected connecting block 2218 to slide backward along the slide groove 2212. When the connecting block 2218 moves forward, it simultaneously drives the horizontal L-shaped push-pull rod 2226 fixed at the top to move forward. The horizontal L-shaped push-pull rod 2226 drives the vertical push-pull plate 2225 to move forward, and the vertical push-pull plate 2225 drives the column rod 2224. As the L-shaped sleeve 2221 slides forward along its inner wall, the C-shaped slider 2223 connected to the front end of the columnar rod 2224 slides forward synchronously along the guide block 2222. At this time, the C-shaped slider 2223 compresses the spring 2227 to store energy. Simultaneously, the C-shaped slider 2223 drives the inner ends of the two upper and lower arc-shaped pull rods 22211 to move forward, and the outer ends of the arc-shaped pull rods 22211 drive the C-shaped rotating block 2229 to rotate inward around the hinge axis of the L-shaped hinge block 2228. During the rotation of the rotating block 2229, the Y-shaped adapter rod 22213 moves forward. The Y-shaped adapter rod 22213 pushes the L-shaped swing block 22212 to swing inward around the hinge axis of the bidirectional hinge block 22210. The L-shaped swing block 22212 drives the arc-shaped swing rod 22214 to swing towards the main injection pipe 214. The arc-shaped swing rod 22214 drives the semi-circular vertical plate 22215, the horizontal Y-shaped sleeve block 22218, and the discharge head 22219 to move synchronously. Moving inward, the two discharge heads 22219 eventually fit together to form a complete discharge channel, at which point the feeding cycle is completed. The discharge end of the forward-moving cylinder 22111 is aligned with the top of the spliced ​​discharge head 22219. The cylinder 22111 injects the hot-melted rubber raw material into the discharge head 22219. The raw material is sent through the discharge head 22219 and the second pipe 22220 into the main injection pipe 214 for temporary storage, completing a single feeding and replenishing action.

[0041] After the material replenishment is completed, as the track 22119 continues to rotate, the right track drives the connecting block 2218 to move backward. The spring 2227 releases its elastic force to push the C-shaped slider 2223 to reset backward. The C-shaped slider 2223 pulls the C-shaped rotating block 2229 to rotate outward and reset through the arc-shaped pull rod 22211. The C-shaped rotating block 2229 pulls the Y-shaped adapter rod 22213 to move backward, causing the L-shaped swing block 22212 to swing outward. The two discharge heads 22219 separate outward with the arc-shaped swing rod 22214, disconnecting the discharge path to prevent raw material leakage. At this time, the connecting block 2218 on the other side slides forward into place along the chute driven by the left track, repeating the above actions of splicing the discharge head and injecting material to achieve alternating cyclic feeding.

[0042] Throughout the entire feeding cycle, the material cylinder 22111 achieves adaptive positioning when moving back and forth via the rectangular slider 22112 along the rectangular slide side block 22110 and guide rail 2214. The abutment groove 2213 limits the rectangular slider abutment rod 22113 to prevent the material cylinder 22111 from overtraveling. The bottom support plate 2217 and the front connecting rod 2216 provide stable support for the side concave block 2215 and the side plate 2211, ensuring the stability of the overall structure of the feeding mechanism.

[0043] The tray 22217 receives residual raw materials dripping from the swing mechanism via the bottom block 22216, preventing the raw materials from contaminating the external structure of the equipment and reducing cleaning difficulty. The main injection pipe 214 continuously injects the collected rubber raw materials into the molding mechanism 3 below. The two material cylinders 22111 alternately feed the raw materials in a cyclical manner, and the discharge head automatically opens and closes to ensure the continuity of raw material supply, avoids excessive single injection pressure leading to raw material leakage, and eliminates the need for frequent manual replenishment, thereby improving the processing efficiency of rubber injection molding.

[0044] like Figure 2 As shown, the injection molding machine 1 includes an outer shell 11, an electrical distribution box 12 is fixedly connected to the right side of the outer shell 11, a control panel 13 is fixedly connected to the front side of the electrical distribution box 12, an upper mold plate 15 is fixedly connected to the front side of the outer shell 11, an injection nozzle 14 is movably connected to the top of the front side of the outer shell 11, an injection support 17 is fixedly connected to the bottom of the front side of the outer shell 11, and a bottom mold 16 is movably connected to the top of the injection support 17.

[0045] During injection molding, the molding raw material is delivered to the injection nozzle 14 through the main injection pipe 214. The bottom mold 16 of the corresponding specification is manually installed and fixed on the top of the injection support 17. The control panel 13 sends a mold closing command, and the external mold closing drive mechanism drives the top mold platen 15 to move downward and complete the mold closing and locking with the bottom mold 16. The power distribution box 12 continuously supplies power to the entire molding process to ensure the stable operation of each drive component.

[0046] After the mold is closed, the injection nozzle 14 is aligned with the injection port of the bottom mold 16, and the hot melt rubber raw material delivered by the main injection pipe 214 is injected into the mold cavity under high pressure. After the cavity is filled with raw material, the pressure is maintained and cooled to solidify. During the pressure maintenance process, the cavity gap caused by cooling shrinkage is continuously replenished to ensure the dimensional accuracy of the rubber product.

[0047] After cooling, the top mold platen 15 drives the upper mold to move upward to open the mold. The molded rubber product is then removed from the bottom mold 16 manually or through an external material handling mechanism. After removing the residual material from the mold parting surface, the next round of rubber injection molding can be carried out.

[0048] Throughout the injection molding process, the alternating feeding mechanism replenishes raw materials in real time according to the molding cycle. When the raw material level in the main injection tube 214 is lower than the preset threshold, the servo motor 22117 continues to rotate. Through the mechanical transmission structure, the two discharge heads 22219 alternately connect to the barrel 22111 to complete the replenishment. The continuous supply of raw materials can be achieved without pausing the injection action, avoiding the problems of traditional single replenishment requiring machine stoppage and large fluctuations in injection pressure.

[0049] Meanwhile, the two spliced ​​discharge heads 22219 automatically cut off the material after opening and closing. Compared with the traditional open discharge structure, this can effectively prevent the hot melt rubber raw material from cooling and solidifying and blocking the discharge channel, and also reduce the waste of raw material dripping. Combined with the alternating feeding mode, it not only ensures the stability of the injection pressure, but also reduces the frequency of equipment maintenance and cleaning, and further improves the processing stability and finished product qualification rate of continuous production.

[0050] Working principle of this invention: When rubber injection molding is required, firstly, two material cylinders 22111 are drawn into the rubber raw material feed cylinder 22111 from the storage box 215 through two pipes 22115 for hot melting. Then, the servo motor 22117 is started, which drives the rear transmission disk 22118 connected to the right side plate to rotate. The track 22119 drives the front transmission disk to rotate synchronously. At the same time, the conical teeth 22120 connected to the transmission disk drives the second conical teeth 22121 to rotate. Then, the third conical teeth 22122 and the columnar transverse transmission rod 22123 drive the left track 22119 to rotate synchronously, so that the two tracks 22119 rotate simultaneously in opposite directions. The servo motor 22117 controls the right side. When the rear drive disc 22118 rotates clockwise, the right track 22119 rotates clockwise and the left track 22119 rotates counterclockwise. The right track 22119 drives its connected connecting block 2218 to slide forward along the slide groove 2212, and the left track 22119 drives its connected connecting block 2218 to slide backward along the slide groove 2212. When the connecting block 2218 moves forward, it simultaneously drives the horizontal L-shaped push-pull rod 2226 fixed at the top to move forward. The horizontal L-shaped push-pull rod 2226 drives the vertical push-pull plate 2225 to move forward. The vertical push-pull plate 2225 drives the columnar rod 2224 to slide forward along the inner wall of the L-shaped sleeve block 2221. The C-shaped slider 2223 connected to the front end of the columnar rod 2224 slides forward synchronously along the guide block 2222. At this time, C The C-shaped slider 2223 compresses the spring 2227 to store energy. Simultaneously, the C-shaped slider 2223 drives the inner ends of the upper and lower arc-shaped pull rods 22211 to move forward. The outer ends of the arc-shaped pull rods 22211 drive the C-shaped rotating block 2229 to rotate inward around the hinge axis of the L-shaped hinge block 2228. During the rotation of the C-shaped rotating block 2229, it drives the Y-shaped adapter rod 22213 to move forward. The Y-shaped adapter rod 22213 pushes the L-shaped swing block 22212 to swing inward around the hinge axis of the bidirectional hinge block 22210. The L-shaped swing block 22212 drives the arc-shaped swing rod 22214 to swing towards the main injection pipe 214. The arc-shaped swing rod 22214 drives the semi-circular vertical plate 22215, the horizontal Y-shaped sleeve block 22218, and the discharge head 22219 to move inward simultaneously. Laterally moving, the two discharge heads 22219 eventually fit together to form a complete discharge channel, thus completing the feeding cycle. The discharge end of the forward-moving cylinder 22111 aligns with the top of the assembled discharge head 22219, and the cylinder 22111 injects the molten rubber material into the discharge head 22219. The material is then sent through the discharge head 22219 and the second pipe 22220 into the main injection pipe 214 for temporary storage, completing a single feeding and replenishment action. After replenishment, as the track 22119 continues to rotate, the right track drives the connecting block 2218 to move backward. The spring 2227 releases its elastic force to push the C-shaped slider 2223 to reset backward. The C-shaped slider 2223 pulls the C-shaped rotating block 2229 outward to reset via the arc-shaped pull rod 22211.C-shaped rotating block 2229 pulls Y-shaped adapter rod 22213 backward, causing L-shaped swing block 22212 to swing outward. The two discharge heads 22219 separate outward with the arc-shaped swing rod 22214, disconnecting the discharge path to prevent material leakage. At this time, the connecting block 2218 on the other side slides forward into position along the slide groove driven by the left track, repeating the above actions of splicing discharge heads and injecting material to achieve alternating cyclic feeding. The molding material is transported to the injection nozzle 14 through the main injection pipe 214. The bottom mold 16 of the corresponding specification is pre-installed and fixed on the top of the injection support 17 by the operator. The control panel 13 sends a mold closing command, and the external mold closing drive mechanism drives the top mold pressure plate 15 to move downward, and the bottom mold pressure plate 15 moves downward. After mold 16 is closed and locked, the power distribution box 12 continuously supplies power to the entire molding process, ensuring stable operation of all driving components. Once the mold is in place, the injection nozzle 14 aligns with the injection port of the bottom mold 16, injecting the hot-melt rubber material from the main injection pipe 214 into the mold cavity under high pressure. After the cavity is filled with material, pressure is maintained for cooling and shaping. During the pressure-maintaining process, the cavity gaps caused by cooling shrinkage are continuously replenished to ensure the dimensional accuracy of the rubber product. After cooling, the top mold platen 15 moves the upper mold upwards to open the mold. The molded rubber product is then manually or through an external material handling mechanism removed from the bottom mold 16. After removing any residual material from the mold parting surface, the next round of rubber injection molding can begin.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An injection unit for a rubber injection molding machine, comprising an injection molding machine (1), characterized in that: The top of the injection molding machine (1) is fixedly connected to a feeding mechanism (2); The injection molding machine (1) includes an outer shell (11), a power distribution box (12) is fixedly connected to the right side of the outer shell (11), a control panel (13) is fixedly connected to the front side of the power distribution box (12), a top mold plate (15) is fixedly connected to the front side of the outer shell (11), an injection nozzle (14) is movably connected to the top of the front side of the outer shell (11), an injection support (17) is fixedly connected to the bottom of the front side of the outer shell (11), and a bottom mold (16) is movably connected to the top of the injection support (17). The feeding mechanism (2) includes a feeding rack (21), and a circulating feeding component (22) is fixedly connected to the front side of the top of the feeding rack (21).

2. The injection device of the rubber injection molding machine according to claim 1, characterized in that: The feeding rack (21) includes an inverted concave plate (211), a storage box (215) is fixedly connected to the rear side of the inverted concave plate (211), a main injection pipe connecting plate (212) is fixedly connected to the middle of the front side of the inverted concave plate (211), side L-shaped stabilizing blocks (213) are fixedly connected to both the left and right sides of the main injection pipe connecting plate (212), a main injection pipe (214) is fixedly connected to the middle of the front side of the main injection pipe connecting plate (212), and the inner sides of the two inverted concave plates (211) are fixedly connected to the top of the left and right sides of the outer shell (11).

3. The injection device of the rubber injection molding machine according to claim 1, characterized in that: The circulating feeding assembly (22) includes two feeding frames (221), and a feeding control frame (222) is fixedly connected to the rear side of the bottom of each of the two feeding frames (221).

4. The injection device of the rubber injection molding machine according to claim 3, characterized in that: Both of the feeding frames (221) include side plates (2211). The top of the outer side of both side plates (2211) is provided with a sliding groove (2212). The middle of the outer side of both side plates (2211) is fixedly connected with a guide rail rod (2214). The bottom of the outer side of both side plates (2211) is provided with abutment groove (2213). The front side of the inner side of both side plates (2211) is fixedly connected with a side concave block (2215). The front side of the outer side of both side concave blocks (2215) is fixedly connected with a front connecting rod (2216). The front side of the bottom of both side concave blocks (2215) is fixedly connected with a bottom support plate (2217). The front side of the bottom of both bottom support plates (2217) is fixedly connected to both sides of the top of the main injection pipe connecting plate (212).

5. The injection device of the rubber injection molding machine according to claim 4, characterized in that: The inner walls of the grooves (2212) on the two side plates (2211) are slidably connected to slide rods (2219). The inner ends of the two slide rods (2219) are fixedly connected to connecting blocks (2218). The outer ends of the two slide rods (2219) are fixedly connected to rectangular groove side blocks (22110). The outer sides of the two rectangular groove side blocks (22110) are slidably connected to rectangular sliders (22112). The rear sides of the inner bottom of the two rectangular sliders (22112) are fixedly connected to rectangular slider abutments (22113). The outer walls of the two rectangular slider abutments (22113) are slidably connected to the inner walls of the two guide rails (2214) at the bottom of the two side plates (2211).

6. The injection device of the rubber injection molding machine according to claim 5, characterized in that: The front side of the inner top of the two rectangular sliders (22112) is fixedly connected to a material cylinder connecting block (22114), the outer side of the two material cylinder connecting blocks (22114) is fixedly connected to a material cylinder (22111), the top of the two material cylinders (22111) is fixedly connected to a pipe (22115), and the end of the two pipes (22115) away from the material cylinder (22111) is fixedly connected to both sides of the top of the storage box (215).

7. The injection device of the rubber injection molding machine according to claim 6, characterized in that: A servo motor (22117) is fixedly connected to the top rear side of the outer side of the right side plate (2211). Both sides of the top inner side of the two side plates (2211) are rotatably connected to a transmission disc (22118). The outer walls of the two sets of transmission discs (22118) are fitted with tracks (22119). A connecting block (22116) is fixedly connected to the top front inner side of the right side plate (2211). The rear side of the connecting block (22116) is rotatably connected to a second conical tooth (22121). The left side of the transmission disc (22118) rotatably connected to the top front side of the right side plate (2211) is fixedly connected to a conical tooth (22120). The outer wall of the conical tooth (22120) meshes with the outer wall of the second conical tooth (22121). The left side of the outer wall of the second conical tooth (22121) meshes with a third conical tooth (22122).

8. The injection device of the rubber injection molding machine according to claim 7, characterized in that: The left side of the third conical tooth (22122) is fixedly connected to a columnar transverse transmission rod (22123). The left end of the columnar transverse transmission rod (22123) is fixedly connected to the inner side of the right front transmission disc (22118). The rear sides of the tops of the two tracks (22119) are fixedly connected to the bottom of the two connecting blocks (2218).

9. The injection device of the rubber injection molding machine according to claim 3, characterized in that: Both of the aforementioned feed control frames (222) include L-shaped sleeves (2221). The tops of both L-shaped sleeves (2221) are fixedly connected to the rear sides of the bottoms of two side plates (2211). The inner walls of both L-shaped sleeves (2221) are slidably connected to columnar rods (2224). The front sides of both L-shaped sleeves (2221) are fixedly connected to guide blocks (2222). The outer walls of both guide blocks (2222) are slidably connected to C-shaped sliders (2223). The rear sides of both C-shaped sliders (2223) are fixedly connected to the two columnar rods. At the front end of (2224), the rear ends of the two columnar rods (2224) are fixedly connected to vertical push-pull plates (2225), the top of the front side of the two vertical push-pull plates (2225) are fixedly connected to horizontal L-shaped push-pull rods (2226), the bottom front side of the two horizontal L-shaped push-pull rods (2226) are fixedly connected to the top of the two connecting blocks (2218), the middle of the rear side of the two C-shaped sliders (2223) are fixedly connected to springs (2227), and the rear ends of the two springs (2227) are fixedly connected to the front side of the two L-shaped sleeves (2221).

10. The injection device of the rubber injection molding machine according to claim 9, characterized in that: Both C-shaped sliders (2223) are rotatably connected to arc-shaped pull rods (22211) at their top and bottom. Both guide blocks (2222) are fixedly connected to L-shaped hinge blocks (2228) at their top and bottom front sides. The inner sides of the two left and two right sets of L-shaped hinge blocks (2228) are rotatably connected to C-shaped rotating blocks (2229). The outer sides of the top and bottom of the two sets of left and right C-shaped rotating blocks (2229) are rotatably connected to the inner sides of the two sets of arc-shaped pull rods (22211). On the side away from the C-shaped slider (2223), the outer sides of both sets of C-shaped rotating blocks (2229) are rotatably connected to Y-shaped adapter rods (22213). The front sides of both sets of Y-shaped adapter rods (22213) are rotatably connected to L-shaped swing blocks (22212). The rear sides of the outer walls of both sets of L-shaped swing blocks (22212) are rotatably connected to bidirectional hinge blocks (22210). The inner sides of both sets of bidirectional hinge blocks (22210) are rotatably connected to the left and right sides. On the front side of the inner side of the C-shaped rotating block (2229), and on the front side of the inner side of the left and right L-shaped swing blocks (22212), arc-shaped swing rods (22214) are fixedly connected. On the front side of the inner side of the left and right arc-shaped swing rods (22214), semi-circular vertical plates (22215) are fixedly connected. On the bottom of the outer side of the two semi-circular vertical plates (22215), horizontal Y-shaped sleeves (22218) are fixedly connected. On the bottom of the two horizontal Y-shaped sleeves (22218), a horizontal Y-shaped sleeve block (22218) is fixedly connected. There is a discharge head (22219), and the bottom of each of the two discharge heads (22219) is fixedly connected to a second pipe (22220). The ends of the two second pipes (22220) away from the discharge head (22219) are fixedly connected to the top of the main injection pipe (214). The bottom sides of the two L-shaped hinge blocks (2228) at the bottom are fixedly connected to bottom blocks (22216), and the bottoms of the two sets of bottom blocks (22216) are fixedly connected to trays (22217).

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