Pre-molding injection molding machine and use method thereof

Abstract

The invention belongs to the technical field of injection molding machines, and discloses a pre-mold-pressing injection molding machine and a using method thereof.The pre-mold-pressing injection molding machine comprises a workbench, a control switch is installed on the side wall of the workbench, and the pre-mold-pressing injection molding machine further comprises a mold pressing assembly arranged on the outer wall of the top of the workbench; by adopting the integrated design of pre-mould pressing and injection molding, firstly, high-viscosity or fiber reinforced plastic which is difficult to be subjected to direct injection molding is subjected to pre-mould pressing treatment, and then a semi-finished product subjected to pre-mould pressing molding is subjected to injection molding so as to realize precise machining of a complex shape, so that the mechanical property of a finished product is remarkably improved, the time required for cooling and curing is shortened, and the production efficiency is improved. By sharing the same hydraulic system, synchronous mold locking and opening of a mold pressing mold and an injection mold are achieved, meanwhile, the device has the automatic feeding and discharging function, continuous automation of production is achieved, and the problems that in a traditional injection molding process, the mechanical performance of finished products is insufficient, and the production period is too long are effectively solved through the design.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molding machines, and in particular relates to a pre-molding injection molding machine and a use method thereof. Background Art

[0002] Injection molding is a processing method that injects molten plastic into a closed mold through a syringe, and obtains the desired product after cooling and solidification. With the continuous progress of industry, the quality requirements for injection molded products are increasing. However, the traditional injection molding process has exposed its limitations in some aspects, which are specifically reflected in: 1. The internal stress distribution is uneven during injection molding, and the mechanical properties of the products produced are weak; 2. It is not possible to inject high viscosity plastics or plastics containing fiber reinforcement; 3. It requires a long time to cool and solidify, resulting in a longer production cycle; Therefore, a pre-molding injection molding machine and a method of using the same are needed to solve this defect by reducing the scrap rate, improving the mechanical properties of the product, processing high-viscosity plastics or plastics containing fiber reinforcement, and shortening the production cycle. Summary of the invention

[0003] In view of the above situation, in order to overcome the defects of the existing technology, an integrated design of pre-molding and injection molding is adopted. First, high-viscosity or fiber-reinforced plastics that are difficult to inject directly are pre-molded, and then the pre-molded semi-finished products are injection molded to achieve precision processing of complex shapes. This process not only significantly improves the mechanical properties of the finished product, but also shortens the time required for cooling and curing. By sharing the same hydraulic system, the synchronous locking and opening of the molding mold and the injection mold are achieved. At the same time, the device is equipped with automatic loading and unloading functions to realize continuous automation of production. This design effectively solves the problems of insufficient mechanical properties of finished products and long production cycle in traditional injection molding processes.

[0004] The technical solution adopted by the present invention is as follows: a pre-molding injection molding machine, comprising a workbench, a control switch is installed on the side wall of the workbench, and the pre-molding injection molding machine also includes a molding assembly arranged on the top wall of the workbench; The molding assembly includes a support column, a first platform, a second platform, a third platform, a transmission column, a molding upper mold, a molding lower mold, a cross ejector frame, a first hydraulic press and a contact rod. The support columns are in a rectangular array and are vertically fixed on the top wall of the workbench. The first platform is horizontally fixed on the end of the support column away from the workbench. The second platform is horizontally fixed on the circumferential side wall of the support column and is arranged below the first platform. The third platform is horizontally fixed on the circumferential side wall of the support column and is arranged below the second platform. The first hydraulic press is installed on the bottom wall of the first platform. The columns are vertically fixed in a rectangular array at the output end of the first hydraulic press, and are used to drive the mold to move and realize mold locking and mold opening. The mold pressing lower mold is fixed on the top wall of the third platform, and the mold pressing upper mold is horizontally fixed on the circumferential side wall of the transmission column and is arranged between the second platform and the mold pressing lower mold. The transmission column is movably penetrated in the third platform and the mold pressing lower mold. The cross ejector frame is vertically slidably arranged inside the mold pressing lower mold and is used to eject the molded semi-finished product. The contact rod is vertically penetrated and slidably arranged inside the third platform, and one end of the contact rod is fixedly connected to the cross ejector frame.

[0005] As a preferred technical solution of this scheme, it also includes an injection molding blanking component arranged on the top wall of the workbench; The injection molding blanking assembly includes a fourth platform, an injection molding upper mold, an injection molding lower mold, a spring and an ejector rod. The fourth platform is horizontally fixed on the circumferential side wall of the support column and is arranged below the third platform. The injection molding lower mold is fixed on the top wall of the fourth platform. The injection molding upper mold is horizontally fixed on the circumferential side wall of the transmission column and is arranged between the third platform and the injection molding lower mold. The transmission column is movably arranged in the fourth platform and the injection molding lower mold. The ejector rod is vertically slidably arranged in the injection molding upper mold. The spring sleeve is arranged on the outside of the ejector rod. One end of the spring is fixed on the top wall of the injection molding upper mold, and the other end of the spring is fixedly connected to the upper end of the ejector rod.

[0006] As a preferred technical solution of this scheme, the injection molding blanking assembly also includes a first baffle, a second baffle, a blanking box, a first rack, a first gear, a second rack, a second gear, a first rod and a second rod. The blanking box is fixedly arranged on a side wall of the fourth platform, the first rack is fixedly arranged on the side walls of two transmission columns close to one side of the blanking box, the first gear is rotatably arranged on the bottom wall of the third platform, the first gear is meshed with the first rack, the first rod is fixedly arranged on the first gear, the first baffle is fixedly arranged on the end of the first rod away from the first gear, the second rack is fixedly arranged on the side walls of the two transmission columns away from one side of the blanking box, the second gear is rotatably arranged on the bottom wall of the third platform, the second gear is meshed with the second rack, the second rod is fixedly arranged on the second gear, the second baffle is fixedly arranged on the end of the second rod away from the second gear, these racks are meshed with corresponding gears for transmitting motion, and when the equipment is in operation, they help the first baffle and the second baffle to open and close, thereby forming a slope for easy blanking.

[0007] As a preferred technical solution of the present scheme, the injection molding blanking assembly also includes a servo motor, an injection molding machine housing, a heater and a screw. The servo motor is fixedly installed on the top wall of the workbench, the injection molding machine housing is fixedly installed on the top wall of the workbench, the interior of the injection molding machine housing is a hollow cavity, the screw is rotatably and slidably arranged inside the injection molding machine housing, one end of the screw is fixedly arranged on the output end of the servo motor, and the heater is fixedly arranged on the surface of the injection molding machine housing.

[0008] As a preferred technical solution of this scheme, it also includes a loading assembly arranged on the top wall of the workbench; The feeding assembly includes a feed barrel, a feed pipe, a solenoid valve, and a feed hose. The feed barrel is fixedly arranged on the top wall of the workbench. Two cavities are provided inside the feed barrel. The feed pipe is fixedly arranged on the bottom outer wall of the feed barrel. One end of the feed pipe is through-connected with the bottom of one of the cavities of the feed barrel, and the other end of the feed pipe is through-connected with the cavity inside the injection molding machine casing. The solenoid valve is fixedly arranged on the bottom of the other cavity of the feed barrel, and the feed end of the solenoid valve is through-connected with the inside of the other cavity of the feed barrel. One end of the feed hose is fixedly arranged on the discharge end of the solenoid valve, and the feed hose is through-connected with the discharge end of the solenoid valve.

[0009] As a preferred technical solution of this scheme, the feeding assembly also includes a third rod, a hose bracket, a third rack and a third gear, the third gear is rotatably arranged on the bottom wall of the second platform, the third rack is fixedly arranged on the side wall of the transmission column, the third rack is meshed with the third gear, the third rod is coaxially fixedly arranged on the surface of the third gear, one end of the hose bracket is fixedly arranged on the side wall of the third rod, the other end of the hose bracket is fixedly connected to the feed hose, and the third rod is connected to the third gear for transmitting motion to the hose bracket. The hose bracket is fixed on the third rod to support and guide the feed hose to ensure that the plastic particles can be accurately transported to the lower mold of the molding.

[0010] As a preferred technical solution of this scheme, the molding assembly also includes a transfer rack and a second hydraulic press, the transfer rack is fixedly arranged on the side wall of the molding lower mold, the second hydraulic press is fixedly installed on the side wall of the third platform, the upper edge of the transfer rack is in conflict with the upper edge of the molding lower mold, and the lower edge of the transfer rack is in conflict with the upper edge of the injection lower mold, so as to help transfer the molded semi-finished product to the injection mold.

[0011] As a preferred technical solution of the present scheme, the injection molding blanking assembly also includes a steering joint and an insulation fixing box. The steering joint is fixedly arranged at one end of the injection molding machine shell, one end of the steering joint is through-connected with the cavity in the injection molding machine shell, and the other end of the steering joint is through-connected with the inside of the lower injection mold. The insulation fixing box is fixedly arranged on the bottom wall of the fourth platform.

[0012] The present invention also provides a method for using the pre-molding injection molding machine, comprising the following specific steps: Step 1: In the feeding state, the plastic particles are transported into the feeding barrel, and the plastic particles enter the injection molding machine housing. The plastic particles are heated and melted under the heating of the heater. The output end of the second hydraulic press extends to push the semi-finished molded product after the processing state is completed into the transfer rack, and the semi-finished molded product enters the lower injection mold through the transfer rack; Step 2: The plastic particles are transported to the lower mold through the feed hose, the first hydraulic press is started to drive the transmission column to move downward, so that the molding mold and the injection mold are locked, and the servo motor drives the auger to extend to squeeze the molten plastic solution into the lower injection mold, and the device is converted to the processing state; Step 3: After the molding and injection molding are completed, the processing state ends, and the molded semi-finished products and the injection-molded plastic parts are cooled. The transmission column moves upward, and the hose bracket rotates to drive the free end of the feed hose to move to the top of the molding lower mold to facilitate feeding. The transmission column also drives the first baffle and the second baffle to rotate and close to each other to complete the closing, forming a slope that is convenient for unloading. During the upward movement of the transmission column, the molded semi-finished products and the injection-molded products are ejected by the ejector rod and the cross ejector rack respectively. The ejected plastic parts fall on the slope and then slide into the unloading box. At this time, the device is switched to the feeding state; After adopting the above structure, the beneficial effects of the present invention are as follows: 1. The integrated design of pre-molding and injection molding is realized. Molding and injection molding are processed simultaneously. High-viscosity or fiber-reinforced plastics that are difficult to directly inject are pre-molded, and then the semi-finished products formed by pre-molding are injection molded to achieve precision processing of complex shapes. It not only improves the mechanical properties of the finished products, but also greatly shortens the time required for cooling and curing. The loading, molding, transfer of semi-finished products after molding, injection molding and unloading of semi-finished products can be completed continuously and automatically, reducing the intermediate links and further improving the processing efficiency. 2. The first hydraulic press cleverly drives the movement of the upper mold for molding and the upper mold for injection molding synchronously, realizing the locking and opening of the molding components and the injection molding components by a single hydraulic system. This design simplifies the number of power sources, not only improving the integration and operation convenience of the equipment, but also reducing energy consumption and maintenance costs; 3. During the mold opening process, the rising action of the injection mold cleverly cooperates with the spring, ejector rod and cross ejector frame to realize the ejection of the semi-finished product after molding and the demoulding of the injection molded product in one fell swoop, thereby improving the degree of automation of the device; 4. The process of the first hydraulic press driving the transmission column to move upward drives the first baffle and the second baffle to close, thereby guiding the demoulded injection molded product into the unloading box, completing the automatic unloading of the injection molded product; 5. After the mold is opened, the top outer wall of the cross ejector frame is flush with the top outer wall of the lower injection mold, forming a smooth transition plane. At this time, the second hydraulic press and the transfer frame are used to complete the automatic transfer of the semi-finished product after molding, which improves the continuity of the device processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present solution and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention.

[0014] Figure 1 It is a schematic diagram of the overall structure of a pre-molding injection molding machine in a processing state of the present invention; Figure 2 for Figure 1 A magnified view of the local structure at point A in the middle; Figure 3 It is a schematic diagram of the overall structure of the feeding state of the present invention; Figure 4 for Figure 3 A magnified view of the local structure at B in the middle; Figure 5 It is a cross-sectional view of the connection structure between the feed barrel and the solenoid valve in the processing state of the present invention; Figure 6 for Figure 5 A magnified view of the local structure at C in the middle; Figure 7 It is a cross-sectional view of the connection structure between the feed barrel and the solenoid valve in the feeding state of the present invention; Figure 8 for Figure 7 A magnified view of the local structure at D in the middle; Fig. 9 It is a schematic diagram of the connection structure of the first baffle and the second baffle in the processing state of the present invention; Fig.10 It is a schematic diagram of the connection structure of the first baffle and the second baffle in the feeding state of the present invention.

[0015] In the attached drawings: 1. workbench; 2. control switch; 3. Molding assembly, 31. Support column, 32. First platform, 33. Second platform, 34. Third platform, 35. Transmission column, 36. Molding upper mold, 37. Molding lower mold, 38. Cross ejector rack, 39. Transfer rack, 310. First hydraulic press, 311. Second hydraulic press, 312. Contact rod; 4. Injection molding blanking assembly, 41. Fourth platform, 42. First baffle, 43. Injection molding upper mold, 44. Injection molding lower mold, 45. Second baffle, 46. Blanking box, 47. Servo motor, 48. Injection molding housing, 49. Heater, 410. First rack, 411. Spring, 412. Ejector rod, 413. Auger, 414. Steering joint, 415. First gear, 416. Second rack, 417. Second gear, 418. Insulation fixing box, 419. First rod, 420. Second rod; 5. Feeding assembly, 51. Feeding barrel, 52. Feeding pipe, 53. Solenoid valve, 54. Feeding hose, 55. Third rod, 56. Hose bracket, 57. Third rack, 58. Third gear. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0017] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0018] Embodiment 1, as Figure 1-Figure 6 As shown, a pre-molding injection molding machine comprises a workbench 1, a control switch 2 is installed on the side wall of the workbench 1, and the pre-molding injection molding machine further comprises a molding assembly 3 arranged on the top wall of the workbench 1; The molding assembly 3 includes a support column 31, a first platform 32, a second platform 33, a third platform 34, a transmission column 35, a molding upper mold 36, a molding lower mold 37, a cross ejector frame 38, a first hydraulic press 310 and a contact rod 312. The support columns 31 are vertically fixed on the top wall of the workbench 1 in a rectangular array, the first platform 32 is horizontally fixed at one end of the support column 31 away from the workbench 1, the second platform 33 is horizontally fixed on the circumferential side wall of the support column 31 and is arranged below the first platform 32, the third platform 34 is horizontally fixed on the circumferential side wall of the support column 31 and is arranged below the second platform 33, and the first hydraulic press 310 is installed on the bottom wall of the first platform 32, the transmission column 35 is vertically fixed in a rectangular array at the output end of the first hydraulic press 310, the molding lower mold 37 is fixed on the top wall of the third platform 34, the molding upper mold 36 is horizontally fixed on the circumferential side wall of the transmission column 35 and is arranged between the second platform 33 and the molding lower mold 37, the transmission column 35 is movably penetrated in the third platform 34 and the molding lower mold 37, the cross ejector frame 38 is vertically slidably arranged inside the molding lower mold 37, the contact rod 312 is vertically penetrated and slidably arranged inside the third platform 34, and one end of the contact rod 312 is fixedly connected to the cross ejector frame 38.

[0019] Working process: The movement of the output end of the first hydraulic press 310 can drive the transmission column 35 to move and then drive the molding upper mold 36 to move.

[0020] like Figure 1-Figure 10 As shown, it also includes an injection molding blanking component 4 arranged on the top wall of the workbench 1; The injection molding blanking component 4 includes a fourth platform 41, an injection molding upper mold 43, an injection molding lower mold 44, a spring 411 and an ejector rod 412. The fourth platform 41 is horizontally fixed on the circumferential side wall of the support column 31 and is arranged below the third platform 34. The injection molding lower mold 44 is fixed on the top wall of the fourth platform 41. The injection molding upper mold 43 is horizontally fixed on the circumferential side wall of the transmission column 35 and is arranged between the third platform 34 and the injection molding lower mold 37. The transmission column 35 is movably arranged in the fourth platform 41 and the injection molding lower mold 44. The ejector rod 412 is vertically slidably arranged in the injection molding upper mold 43. The spring 411 is sleeved on the outside of the ejector rod 412. One end of the spring 411 is fixed on the top wall of the injection molding upper mold 43, and the other end of the spring 411 is fixedly connected to the upper end of the ejector rod 412.

[0021] Working process: the molding upper mold 36 and the injection molding upper mold 43 are driven upward by the transmission column 35, and the injection molding upper mold 43 drives the ejector rod 412 to move upward. The ejector rod 412 stops moving upward after contacting the outer wall of the bottom of the third platform 34. At this time, the injection molding upper mold 43 is still moving upward, so that the ejector rod 412 can eject the injection molded plastic parts. The ejected plastic parts fall on the slope formed by the first baffle 42 and the second baffle 45 and then slide into the discharge box 46. During the upward movement of the injection molding upper mold 43, it contacts the bottom of the contact rod 312, driving the cross ejector frame 38 to move upward and then eject the molded semi-finished product after molding. After the position of the injection molding upper mold 43 is fixed, the top surface of the cross ejector frame 38 is flush with the top surface of the molding lower mold 37.

[0022] The injection molding blanking assembly 4 further includes a first baffle 42, a second baffle 45, a blanking box 46, a first rack 410, a first gear 415, a second rack 416, a second gear 417, a first rod 419 and a second rod 420. The blanking box 46 is fixedly arranged on a side wall of the fourth platform 41, the first rack 410 is fixedly arranged on the side walls of the two transmission columns 35 close to the side of the blanking box 46, the first gear 415 is rotatably arranged on the bottom wall of the third platform 34, and the first gear 415 is meshed with the first rack 410. The first rod 419 is fixed on the first gear 415, the first baffle 42 is fixed on the end of the first rod 419 away from the first gear 415, the second rack 416 is fixed on the side walls of the two transmission columns 35 away from the side of the discharge box 46, the second gear 417 is rotatably arranged on the bottom wall of the third platform 34, the second gear 417 is meshed with the second rack 416, the second rod 420 is fixed on the second gear 417, and the second baffle 45 is fixed on the end of the second rod 420 away from the second gear 417.

[0023] Working process: during the upward movement of the transmission column 35, the first rack 410 and the second rack 416 are driven by the transmission column 35 to move upward, the first rack 410 drives the first gear 415 to rotate, the first gear 415 drives the first rod 419 to rotate and then drives the first baffle 42 to rotate, the second rack 416 drives the second gear 417 to rotate, the second gear 417 drives the second rod 420 to rotate and then drives the second baffle 45 to rotate, the first baffle 42 and the second baffle 45 rotate and approach each other to complete the closure, forming a slope with the bottom of the slope opening toward the discharge box 46.

[0024] Among them, the injection molding unloading component 4 also includes a servo motor 47, an injection molding machine housing 48, a heater 49 and an auger 413. The servo motor 47 is fixedly installed on the top wall of the workbench 1, the injection molding machine housing 48 is fixedly arranged on the top wall of the workbench 1, the interior of the injection molding machine housing 48 is a hollow cavity, the auger 413 is rotatably and slidably arranged inside the injection molding machine housing 48, one end of the auger 413 is fixedly arranged on the output end of the servo motor 47, and the heater 49 is fixedly arranged on the surface of the injection molding machine housing 48.

[0025] Embodiment 2, this embodiment is based on the previous embodiment: like Figure 1-Figure 10 As shown, it also includes a loading assembly 5 arranged on the top wall of the workbench 1; The loading assembly 5 includes a feed barrel 51, a feed pipe 52, a solenoid valve 53, and a feed hose 54. The feed barrel 51 is fixedly arranged on the top wall of the workbench 1. Two cavities are opened inside the feed barrel 51. The feed pipe 52 is fixedly arranged on the bottom outer wall of the feed barrel 51. One end of the feed pipe 52 is through-connected with the bottom of one of the cavities of the feed barrel 51, and the other end of the feed pipe 52 is through-connected with the cavity inside the injection molding machine housing 48. The solenoid valve 53 is fixedly arranged on the bottom of the other cavity of the feed barrel 51. The feed end of the solenoid valve 53 is through-connected with the inside of another cavity of the feed barrel 51. One end of the feed hose 54 is fixedly arranged on the discharge end of the solenoid valve 53, and the feed hose 54 is through-connected with the discharge end of the solenoid valve 53.

[0026] Working process: plastic particles are transported to the inside of the feed barrel 51, and the plastic particles in one cavity enter the injection molding machine housing 48 through the feed pipe 52. When the solenoid valve 53 is in the open state, the plastic particles in the other cavity are transported to the lower molding mold 37 through the feed hose 54.

[0027] Among them, the feeding assembly 5 also includes a third rod 55, a hose bracket 56, a third rack 57 and a third gear 58. The third gear 58 is rotatably arranged on the bottom wall of the second platform 33. The third rack 57 is fixed on the side wall of the transmission column 35. The third rack 57 is meshed with the third gear 58. The third rod 55 is coaxially fixed on the surface of the third gear 58. One end of the hose bracket 56 is fixed on the side wall of the third rod 55, and the other end of the hose bracket 56 is fixedly connected to the feeding hose 54.

[0028] Working process: the third rack 57 is driven by the transmission column 35 to move upward, the third rack 57 drives the third gear 58 to rotate, the rotation of the third gear 58 drives the third rod 55 to rotate and then drives the hose bracket 56 to rotate, the rotation of the hose bracket 56 drives the free end of the feed hose 54 to move above the lower molding die 37 to facilitate feeding.

[0029] Among them, the molding assembly 3 also includes a transfer rack 39 and a second hydraulic press 311. The transfer rack 39 is fixed on the side wall of the molding lower mold 37, and the second hydraulic press 311 is fixed on the side wall of the third platform 34. The upper edge of the transfer rack 39 is in conflict with the upper edge of the molding lower mold 37, and the lower edge of the transfer rack 39 is in conflict with the upper edge of the injection lower mold 44.

[0030] Among them, the injection molding unloading component 4 also includes a steering joint 414 and an insulation fixing box 418. The steering joint 414 is fixed at one end of the injection molding machine shell 48. One end of the steering joint 414 is through-connected with the cavity in the injection molding machine shell 48, and the other end of the steering joint 414 is through-connected with the inside of the injection molding lower mold 44. The insulation fixing box 418 is fixed on the bottom wall of the fourth platform 41.

[0031] Embodiment 3, this embodiment is based on the previous embodiment: This embodiment provides a method for using a pre-molding injection molding machine: Step 1: When in the feeding state, the plastic particles are transported to the cavity inside the feed barrel 51. At this time, the plastic particles in one of the cavities enter the injection molding machine housing 48 through the feed pipe 52. The plastic particles are heated and melted by the heater 49. The solenoid valve 53 is in a closed state. The output end of the second hydraulic press 311 extends to push the semi-finished molded product after the processing state is completed into the transfer rack 39. The semi-finished molded product enters the lower injection mold 44 via the transfer rack 39. Step 2, the solenoid valve 53 is opened, and the plastic particles are transported to the molding lower mold 37 through the feeding hose 54. After the feeding is completed, the solenoid valve 53 is closed, and the first hydraulic press 310 is started. The output end of the first hydraulic press 310 extends, driving the transmission column 35 to move downward, and the transmission column 35 drives the molding upper mold 36 and the injection molding upper mold 43 to move downward until the molding upper mold 36 and the molding lower mold 37 are in contact to complete the mold locking. At this time, the servo motor 47 drives the auger 413 to squeeze the molten plastic solution into the injection molding lower mold 44, and the device is converted to the processing state; Step 3: After the molding and injection molding process is completed, the processing state ends, and after the molded semi-finished product and the injection-molded plastic part are cooled, the output end of the first hydraulic press 310 contracts, driving the transmission column 35 to move upward. During the upward movement of the transmission column 35: The third rack 57 is driven by the transmission column 35 to move upward, and the third rack 57 drives the third gear 58 to rotate. The rotation of the third gear 58 drives the third rod 55 to rotate and then drives the hose bracket 56 to rotate. The rotation of the hose bracket 56 drives the free end of the feeding hose 54 to move above the lower molding die 37 to facilitate feeding. The first rack 410 and the second rack 416 are driven by the transmission column 35 to move upward, the first rack 410 drives the first gear 415 to rotate, the first gear 415 drives the first rod 419 to rotate and then drives the first baffle 42 to rotate, the second rack 416 drives the second gear 417 to rotate, the second gear 417 drives the second rod 420 to rotate and then drives the second baffle 45 to rotate, the first baffle 42 and the second baffle 45 rotate and approach each other to complete the closing, forming a slope with a bottom facing the opening of the discharge box 46; The molding upper mold 36 and the injection molding upper mold 43 are driven by the transmission column 35 to move upward, and the injection molding upper mold 43 drives the ejector rod 412 to move upward. The ejector rod 412 stops moving upward after contacting the bottom wall of the third platform 34. At this time, the injection molding upper mold 43 is still moving upward, so that the ejector rod 412 can eject the injection molded plastic parts. The ejected plastic parts fall onto the slope formed by the first baffle plate 42 and the second baffle plate 45 and then slide into the unloading box 46. During the upward movement of the injection molding upper mold 43, it contacts the bottom of the contact rod 312, driving the cross ejector frame 38 to move upward and then eject the molded semi-finished product after molding. After the position of the injection molding upper mold 43 is fixed, the top surface of the cross ejector frame 38 is flush with the top surface of the molding lower mold 37, and the device is now in the feeding state.

[0032] In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creatively designing without departing from the purpose of the invention, they should all fall within the scope of protection of the invention.

Claims

1. A pre-molding injection molding machine, comprising a workbench (1), a control switch (2) being installed on a side wall of the workbench (1), characterized in that: The pre-molding injection molding machine further comprises a molding assembly (3) arranged on the top wall of the workbench (1), an injection molding blanking assembly (4) arranged below the molding assembly (3), and a loading assembly (5) arranged on one side of the molding assembly (3), wherein the injection molding blanking assembly (4) is transmission-connected to the molding assembly (3), and the loading assembly (5) is transmission-connected to the molding assembly (3); The molding assembly (3) comprises a support column (31), a third platform (34), a transmission column (35), a molding upper mold (36) and a molding lower mold (37); the support columns (31) are vertically fixed on the top wall of the workbench (1) in a rectangular array; the third platform (34) is horizontally fixed on the circumferential side wall of the support column (31); the transmission columns (35) are vertically slidably penetrated in the third platform (34) in a rectangular array; the molding lower mold (37) is fixed on the top wall of the third platform (34); the molding upper mold (36) is horizontally fixed on the circumferential side wall of the transmission column (35) and is arranged above the molding lower mold (37); the transmission column (35) is slidably penetrated in the third platform (34) and the molding lower mold (37); The injection molding blanking assembly (4) comprises a fourth platform (41), an injection molding upper mold (43), and an injection molding lower mold (44); the fourth platform (41) is horizontally fixedly arranged on the circumferential side wall of the support column (31) and arranged below the third platform (34); the injection molding lower mold (44) is fixedly arranged on the top wall of the fourth platform (41); the injection molding upper mold (43) is horizontally fixedly arranged on the circumferential side wall of the transmission column (35) and arranged between the third platform (34) and the injection molding lower mold (44); the transmission column (35) is movably arranged to penetrate the fourth platform (41) and the injection molding lower mold (44).

2. A pre-molding injection molding machine according to claim 1, characterized in that: The injection molding blanking assembly (4) further comprises a first baffle (42), a second baffle (45), a blanking box (46), a first rack (410), a first gear (415), a second rack (416), a second gear (417), a first rod (419) and a second rod (420); the blanking box (46) is fixedly mounted on a side wall of a fourth platform (41); the first rack (410) is fixedly mounted on the side walls of two transmission columns (35) close to a side of the blanking box (46); the first gear (415) is rotatably mounted on the bottom wall of the third platform (34); the first gear (415) is meshed with the first rack (410) The first rod (419) is fixed on the first gear (415), the first baffle (42) is fixed on one end of the first rod (419) away from the first gear (415), the second rack (416) is fixed on the side walls of the two transmission columns (35) away from the side of the unloading box (46), the second gear (417) is rotatably arranged on the bottom wall of the third platform (34), the second gear (417) is meshed with the second rack (416), the second rod (420) is fixed on the second gear (417), and the second baffle (45) is fixed on one end of the second rod (420) away from the second gear (417).

3. A pre-molding injection molding machine according to claim 2, characterized in that: The injection molding blanking assembly (4) further comprises a spring (411) and an ejector rod (412); the ejector rod (412) is vertically slidably disposed in the injection molding upper mold (43); the spring (411) is sleeved on the outside of the ejector rod (412); one end of the spring (411) is fixedly disposed on the top wall of the injection molding upper mold (43); and the other end of the spring (411) is fixedly connected to the upper end of the ejector rod (412).

4. A pre-molding injection molding machine according to claim 3, characterized in that: The molding assembly (3) further comprises a first platform (32), a second platform (33), a cross ejector frame (38), a first hydraulic press (310) and a contact rod (312); the first platform (32) is horizontally fixedly arranged at one end of the support column (31) away from the workbench (1); the second platform (33) is horizontally fixedly arranged on the circumferential side wall of the support column (31) and arranged between the first platform (32) and the third platform (34); the cross ejector frame (38) is vertically slidably arranged inside the molding lower mold (37); the contact rod (312) is vertically penetrated and slidably arranged inside the third platform (34); one end of the contact rod (312) is fixedly connected to the cross ejector frame (38); the first hydraulic press (310) is mounted on the bottom wall of the first platform (32); and the output end of the first hydraulic press (310) is fixedly connected to one end of the transmission column (35).

5. A pre-molding injection molding machine according to claim 4, characterized in that: The injection molding unloading component (4) further comprises a servo motor (47), an injection molding machine casing (48), a heater (49) and a screw (413); the servo motor (47) is fixedly mounted on the top wall of the workbench (1); the injection molding machine casing (48) is fixedly mounted on the top wall of the workbench (1); the interior of the injection molding machine casing (48) is a hollow cavity; the screw (413) is rotatably and slidably mounted inside the injection molding machine casing (48); one end of the screw (413) is fixedly mounted on the output end of the servo motor (47); and the heater (49) is fixedly mounted on the surface of the injection molding machine casing (48).

6. A pre-molding injection molding machine according to claim 5, characterized in that: The feeding assembly (5) comprises a feeding barrel (51), a feeding pipe (52), a solenoid valve (53), and a feeding hose (54). The feeding barrel (51) is fixedly arranged on the top wall of the workbench (1). Two cavities are provided inside the feeding barrel (51). The feeding pipe (52) is fixedly arranged on the bottom outer wall of the feeding barrel (51). One end of the feeding pipe (52) is connected to the bottom of one of the cavities of the feeding barrel (51). The other end of the feeding pipe (52) is connected to the cavity inside the injection molding machine housing (48). The solenoid valve (53) is fixedly arranged on the bottom of the other cavity of the feeding barrel (51). The feeding end of the solenoid valve (53) is connected to the inside of the other cavity of the feeding barrel (51). One end of the feeding hose (54) is fixedly arranged on the discharge end of the solenoid valve (53). The feeding hose (54) is connected to the discharge end of the solenoid valve (53).

7. A pre-molding injection molding machine according to claim 6, characterized in that: The feeding assembly (5) further comprises a third rod (55), a hose bracket (56), a third rack (57) and a third gear (58); the third gear (58) is rotatably mounted on the bottom wall of the second platform (33); the third rack (57) is fixedly mounted on the side wall of the transmission column (35); the third rack (57) is meshed with the third gear (58); the third rod (55) is coaxially fixedly mounted on the surface of the third gear (58); one end of the hose bracket (56) is fixedly mounted on the side wall of the third rod (55); and the other end of the hose bracket (56) is fixedly connected to the feeding hose (54).

8. A pre-molding injection molding machine according to claim 7, characterized in that: The molding assembly (3) further comprises a transfer frame (39) and a second hydraulic press (311), wherein the transfer frame (39) is fixedly mounted on a side wall of the molding lower mold (37), and the second hydraulic press (311) is fixedly mounted on a side wall of the third platform (34), wherein an upper edge of the transfer frame (39) abuts against an upper edge of the molding lower mold (37), and a lower edge of the transfer frame (39) abuts against an upper edge of the injection molding lower mold (44).

9. A pre-molding injection molding machine according to claim 8, characterized in that: The injection molding blanking assembly (4) further comprises a steering joint (414) and a heat-insulating fixing box (418); the steering joint (414) is fixedly arranged at one end of the injection molding machine housing (48); one end of the steering joint (414) is connected to a cavity in the injection molding machine housing (48); the other end of the steering joint (414) is connected to the inside of the lower injection molding mold (44); and the heat-insulating fixing box (418) is fixedly arranged on the bottom wall of the fourth platform (41).

Images