Vertical plunger type BMC injection molding machine

Abstract

The invention relates to the technical field of injection molding machining, in particular to a vertical plunger type BMC injection molding machine which comprises a rack, a bearing frame is arranged on the rack, a lifting hole is formed in the bearing frame in a penetrating mode, and an injection molding pipe is arranged at the position of the lifting hole and used for plastic injection molding; the forming mold is arranged on the rack and corresponds to the lower portion of the injection molding pipe, and a cavity is formed in the upper portion of the forming mold and used for injection molding; and the material pressing mechanism is used for pressing molten plastic in the injection molding pipe, and the material pressing mechanism comprises an adjusting frame arranged on the injection molding pipe, a material pressing block arranged in the injection molding pipe, a pressing rod installed on the material pressing block and an adjusting air cylinder used for adjusting the pressing depth of the pressing rod. The technical effects of improving the injection molding efficiency and ensuring the injection molding quality are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molding, and in particular to a vertical plunger BMC injection molding machine. Background Art

[0002] In the current BMC injection molding industry, injection precision remains a key factor affecting product quality and production efficiency. Traditional injection molding machines have significant deficiencies in adjusting the material depth, controlling injection pressure, managing mold temperature, and preventing injection tube blockage. This makes it difficult to achieve precise material filling and molding results during the injection molding process, seriously impacting the quality and production efficiency of BMC products.

[0003] The pressure depth adjustment of traditional injection molding machines usually relies on mechanical limit devices, which have limited adjustment accuracy and cannot achieve fine depth adjustments. When injecting BMC materials, due to their high viscosity and poor fluidity, if the pressure depth is not accurately controlled, the molten plastic will not be able to completely fill the mold cavity, resulting in defects such as material shortage and short shot in the product. A pressure depth that is too shallow will result in insufficient plastic filling, while a pressure that is too deep may lead to excessive injection pressure, causing problems such as burrs and flash, affecting the dimensional accuracy and appearance quality of the product. The stability of the injection pressure is crucial to injection molding accuracy. The pressure block of traditional injection molding machines lacks effective buffering measures during the pressure application process. The impact force generated when the pressure block contacts the molten plastic can cause instantaneous fluctuations in the injection pressure. This pressure fluctuation not only destroys the flow stability of the molten plastic and causes uneven distribution of the plastic in the mold cavity, but also leads to defects such as bubbles and shrinkage holes in the product.

[0004] In view of the above-mentioned related technologies, it is necessary to propose a vertical plunger BMC injection molding machine to solve one of the above-mentioned technical problems. Summary of the Invention

[0005] In order to solve one of the above technical problems, the present application provides a vertical plunger BMC injection molding machine.

[0006] This application provides a vertical plunger BMC injection molding machine, which adopts the following technical solutions: A vertical plunger type BMC injection molding machine, comprising: A frame, wherein a supporting frame is provided on the frame, a lifting hole is provided through the supporting frame, and an injection tube is provided at the lifting hole for plastic injection molding; A forming mold is provided on the frame and is arranged below the injection tube. A cavity is provided above the forming mold for injection molding; and A pressing mechanism is used to press the molten plastic in the injection molding tube. The pressing mechanism includes an adjusting frame arranged on the injection molding tube, a pressing block arranged in the injection molding tube, a pressing rod installed on the pressing block and an adjusting cylinder for adjusting the pressing depth of the pressing rod. A support plate is provided on the top of the adjusting frame, an adjusting hole is provided through the support plate, the top of the pressing rod passes through the adjusting hole, a fixing frame is provided on the support plate, and the adjusting cylinder is provided on the fixing frame. A combination sleeve is provided at the output end of the adjusting cylinder, and the combination sleeve is driven by the output end of the adjusting cylinder to be plugged into the top of the pressing rod, so that the pressing rod pushes the pressing block to extrude the molten material in the injection molding tube, so that the injection molding tube is injection molded in the molding mold.

[0007] By adopting the above technical solution, a supporting frame is set on the frame and a lifting hole is set through it, and the injection tube is set at the lifting hole, which can ensure that the injection tube can stably perform plastic injection molding operations; the molding mold is correspondingly arranged below the injection tube and has a cavity above it, which can enable the molten plastic extruded by the injection tube to be accurately injected into the cavity to complete injection molding; in the pressing mechanism, the adjusting frame is set on the injection tube, the pressing block is placed in the injection tube, the pressing rod is installed on the pressing block, and the adjusting cylinder is installed on the fixed frame on the support plate and its output end is connected to the top of the pressing rod through a combination sleeve. By adjusting the movement of the output end of the cylinder, the pressing rod can be accurately driven to push the pressing block to extrude the molten material in the injection tube, thereby realizing stable and efficient injection into the molding mold, ensuring the smooth progress of the injection molding process, and improving the molding quality of the product.

[0008] Optionally, the fixing frame includes a fixing rod fixedly connected to the support plate and a stabilizing plate supporting the adjusting cylinder, the stabilizing plate is fixedly connected to the fixing rod, the outer sleeve of the combination sleeve is provided with a limiting plate, and both sides of the limiting plate are penetrated and slidably connected to the fixing rod.

[0009] By adopting the above technical solution, the fixed frame is composed of a fixed rod fixedly connected to the support plate and a stabilizing plate fixedly connected to the fixed rod to support the adjusting cylinder. This structure enhances the stability of the installation of the adjusting cylinder and can effectively reduce the shaking of the adjusting cylinder during operation; at the same time, the limiting plates on the outside of the combination sleeve are penetrated and slidably connected to the fixed rod on both sides, which can limit the movement of the combination sleeve, making the plug-in process of the combination sleeve and the top of the pressure rod smoother and more precise, ensuring the accuracy and stability of the action of the pressure rod pushing the pressure block to extrude the molten material in the injection tube, thereby improving the injection molding quality.

[0010] Optionally, an anti-blocking mechanism is further included for preventing blockage in the injection molding tube. The anti-blocking mechanism includes a protective tube arranged at the bottom of the pressing block, a telescopic push rod arranged in the protective tube, and a telescopic cylinder for adjusting the telescopic push rod. The telescopic cylinder is arranged above the interior of the protective tube, and a connecting piece is provided at the output end of the telescopic cylinder. The connecting piece is connected to one end of the telescopic push rod to drive the telescopic push rod to extend the tube mouth of the injection molding tube.

[0011] By adopting the above technical solution, during the injection molding process, when the nozzle of the injection molding tube is at risk of being blocked, the telescopic cylinder located above the inside of the protective tube is started, and its output end drives the telescopic ejector rod to move in the protective tube through the connecting piece, thereby realizing the ejection operation of the nozzle of the injection molding tube. The material that may block the nozzle can be pushed away or loosened in time, effectively preventing the injection molding tube from being blocked, ensuring that the injection molding work of the injection molding machine can be carried out continuously and stably, and improving the injection molding efficiency and product quality.

[0012] Optionally, an elastic spherical pad is provided on the outer end surface of the rod head of the telescopic mandrel, and the outer surface of the elastic spherical pad is in contact with the inner wall of the tube mouth of the injection molding tube.

[0013] By adopting the above technical solution, the elastic spherical pad provided on the outer end face of the telescopic ejector rod head contacts the inner wall of the nozzle of the injection molding tube, thereby avoiding wear caused by direct rigid contact between the telescopic ejector rod and the inner wall of the nozzle, protecting the inner wall of the nozzle and the telescopic ejector rod, and extending the service life. At the same time, the elastic spherical pad can better adapt to the shape of the inner wall of the nozzle, effectively preventing the accumulation and blockage of molten plastic at the nozzle, and ensuring the smooth progress of the injection molding process.

[0014] Optionally, a sealing sheet is provided at the tube opening of the protective tube, the telescopic top rod passes through the sealing sheet, and the sealing sheet does not affect the extension of the telescopic top rod.

[0015] By adopting the above technical solution, the molten plastic in the injection molding tube can be effectively prevented from entering the protective tube, thereby avoiding damage to the components related to the telescopic cylinder or affecting its normal operation. At the same time, the sealing sheet will not hinder the extension action of the telescopic ejector rod, ensuring that the telescopic ejector rod can smoothly realize the extension operation of the injection molding tube nozzle, and ensuring the stable and reliable operation of the anti-blocking mechanism.

[0016] Optionally, a buffer mechanism is further included for applying pressure buffer to the pressing block. The buffer mechanism includes a pressure sensor arranged on the top of the pressing block, a damper arranged on the pressure rod, and a splicing block connected to the damper. The pressure sensor is connected to the splicing block, and pressure is applied to the pressing block through the pressure rod, and buffering and pressure value detection are performed through the damper and the pressure sensor.

[0017] By adopting the above technical solution, when the pressure rod applies pressure to the press block, the damper of the buffer mechanism can play a buffering role, reducing the impact force generated during the pressure application process, avoiding damage to the equipment or affecting the injection molding effect due to excessive pressure; at the same time, the pressure sensor can detect the pressure value of the press block in real time, so that the operator can accurately grasp the pressure situation, thereby better controlling the injection molding process and ensuring the stability of the injection molding quality.

[0018] Optionally, lifting cylinders are provided on both sides of the top of the support frame, and a connecting shaft is provided at the output end of the lifting cylinder. The connecting shaft is connected to the bottom of the support plate, and is used to lift the support plate to drive the adjustment frame to lift the injection tube.

[0019] By adopting the above technical solution, when the lifting cylinder is started, it can drive the support plate to move up and down, and then the support plate drives the adjustment frame to realize the lifting and lowering of the injection molding tube, so as to accurately adjust the height position of the injection molding tube, better adapt to different injection molding operation scenarios and the height requirements of the molding mold, and improve the flexibility and adaptability of the injection molding operation.

[0020] Optionally, sliding rods are provided around the top of the carrier frame, and the sliding rods pass through the support plate. The support plate slides vertically with the sliding rods. Sliding sleeves are provided around the bottom of the support plate and corresponding to the outside of the sliding rods. The inner wall of the sliding sleeve is slidably connected to the outside of the sliding rod.

[0021] By adopting the above technical solution, the arrangement of the sliding rod and the sliding sleeve provides a guide for the lifting and lowering of the support plate, thereby ensuring the stability and accuracy of the lifting and lowering process of the support plate, and further ensuring the stability of the adjustment frame in driving the injection molding tube to lift and lower.

[0022] Optionally, it also includes a pushing mechanism for pushing the molding die under the injection molding tube, the pushing mechanism includes a receiving frame for the bottom of the molding die, a positioning block arranged on the frame and a pushing cylinder installed on the positioning block, the output end of the pushing cylinder is provided with a mounting block, and the output end of the pushing cylinder is connected to one side of the receiving frame through the mounting block.

[0023] By adopting the above technical solution, a pushing mechanism is set up to automatically push the molding mold to the bottom of the injection tube, the bottom of the molding mold is supported by the receiving frame, the pushing cylinder is fixed with the help of the positioning block, and the output end of the pushing cylinder is connected to one side of the receiving frame through the mounting block. The molding mold can be accurately controlled to move to the appropriate position directly below the injection tube, ensuring the smooth progress of the injection molding work and improving the work efficiency and the accuracy of the injection molding position.

[0024] Optionally, a cooling mechanism is provided in the receiving frame for cooling the forming mold during forming. The cooling mechanism includes a cooling circulation pipeline provided inside the receiving frame and a cold air delivery pump provided in the frame. The cold air delivery pump is provided on the cooling circulation pipeline. The cold air delivery pump is connected to an external cold air source to provide cold air to the cooling circulation pipeline.

[0025] By adopting the above technical solution, cold air is provided to the cooling circulation pipeline inside the receiving frame, which can effectively cool the molding mold and accelerate the cooling and solidification of the plastic in the molding mold, thereby promoting the molding mold to complete cooling and molding, and improving the production efficiency and quality of injection molded products.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. By adjusting the cylinder to drive the combination sleeve and the top of the pressure rod, the pressure rod pushes the pressure block to extrude the molten material in the injection tube. The depth and force of the pressure during each injection can be accurately controlled to avoid injection defects such as insufficient filling and bubbles caused by inaccurate pressure depth or uneven force, thereby significantly improving the quality of injection molding. 2. The telescopic ejector in the anti-clogging mechanism can push the nozzle of the injection molding tube to promptly remove solidified plastic or impurities that may be blocking the nozzle, ensuring that the molten plastic can flow smoothly from the injection molding tube into the mold cavity, ensuring a continuous and smooth injection process, and reducing production interruptions and defective product rates caused by blockages; 3. The buffer mechanism uses the damper and pressure sensor to buffer the pressure on the pressing block and detect the real-time pressure value. When the pressure rod applies pressure to the pressing block, the damper can slow down the speed of pressure change to avoid damage to the injection tube and molding mold caused by instantaneous excessive pressure. At the same time, the pressure sensor monitors the pressure value in real time and dynamically adjusts the pressure according to the actual situation, further ensuring the stability and accuracy of the pressing operation and effectively improving the molding quality and production efficiency of plastic products. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural schematic diagram of a vertical plunger BMC injection molding machine in this application from a first perspective.

[0028] Figure 2 This is a structural schematic diagram of a vertical plunger BMC injection molding machine in the present application from a second perspective.

[0029] Figure 3 It is a plan view of a vertical plunger BMC injection molding machine in this application.

[0030] Figure 4 It is a plan view of a material pressing mechanism of a vertical plunger type BMC injection molding machine in this application.

[0031] Figure 5 yes Figure 1 A magnified schematic diagram of the structure at point A.

[0032] Figure 6 yes Figure 2 A magnified schematic diagram of the structure at point B.

[0033] Figure 7 It is a cross-sectional view of an injection tube of a vertical plunger-type BMC injection molding machine in the present application, in which an anti-clogging mechanism is provided.

[0034] Figure 8 The present invention is a cross-sectional view of an injection tube of a vertical plunger-type BMC injection molding machine with an anti-blocking mechanism and a buffer mechanism.

[0035] Figure 9 It is a cross-sectional view of a carrier frame of a vertical plunger-type BMC injection molding machine in this application.

[0036] In the figure: 1. Frame; 11. Carrier; 12. Lifting hole; 13. Injection tube; 14. Lifting cylinder; 15. Connecting shaft; 16. Slide rod; 17. Slide sleeve; 2. Molding die; 21. Cavity; 3. Pressing mechanism; 31. Adjusting frame; 32. Pressing block; 33. Pressing rod; 34. Adjusting cylinder; 35. Support plate; 351. Adjusting hole; 36. Fixing frame; 361. Fixing rod; 362. Stabilizing plate; 37. Combination sleeve; 371. Limiting plate; 4. Anti-blocking mechanism; 41 , protective tube; 42. Telescopic push rod; 43. Telescopic cylinder; 44. Connecting piece; 45. Elastic spherical pad; 46. Sealing piece; 5. Buffer mechanism; 51. Pressure sensor; 52. Damper; 53. Splicing block; 6. Pushing mechanism; 61. Support frame; 62. Positioning block; 63. Pushing cylinder; 64. Mounting block; 7. Cooling mechanism; 71. Cooling circulation pipeline; 72. Cold air delivery pump; 8. Feeding mechanism; 81. Feeding pipeline; 82. Delivery pipe; 83. Connecting flange. DETAILED DESCRIPTION

[0037] The following is combined with the accompanying drawings Figures 1-9 This application is described in further detail.

[0038] Example 1, reference Figures 1-6 The embodiment of the present application discloses a vertical plunger BMC injection molding machine, including: a frame 1, a molding mold 2 and a pressing mechanism 3.

[0039] The frame 1 is provided with a carrier 11, and a lifting hole 12 is provided on the carrier 11. An injection tube 13 is provided at the lifting hole 12 for plastic injection molding; a molding die 2 is provided on the frame 1, corresponding to the lower portion of the injection tube 13, and a cavity 21 is provided above the molding die 2 for injection molding; a pressing mechanism 3 is used to press the molten plastic in the injection tube 13, and the pressing mechanism 3 includes an adjusting frame 31 provided on the injection tube 13, a pressing block 32 provided in the injection tube 13, a pressing rod 33 installed on the pressing block 32, and a pressing rod 33 for pressing the pressing rod 33. An adjusting cylinder 34 for adjusting the pressure depth, a support plate 35 is provided on the top of the adjusting frame 31, an adjusting hole 351 is penetrated through the support plate 35, the top of the pressure rod 33 is penetrated through the adjusting hole 351, a fixing frame 36 is provided on the support plate 35, the adjusting cylinder 34 is set on the fixing frame 36, and a combination sleeve 37 is provided at the output end of the adjusting cylinder 34. The combination sleeve 37 is driven by the output end of the adjusting cylinder 34 to be plugged into the top of the pressure rod 33, so that the pressure rod 33 pushes the pressing block 32 to extrude the molten material in the injection tube 13, so that the injection tube 13 is injection molded in the molding mold 2.

[0040] A carrier frame 11 is set on the frame 1 and a lifting hole 12 is set through it. The injection tube 13 is set at the lifting hole 12, which can ensure that the injection tube 13 can stably perform plastic injection molding; the molding mold 2 is correspondingly arranged below the injection tube 13 and has a cavity 21 above it, which can enable the molten plastic extruded by the injection tube 13 to be accurately injected into the cavity 21 to complete injection molding; in the pressing mechanism 3, the adjusting frame 31 is set on the injection tube 13, the pressing block 32 is placed in the injection tube 13, the pressing rod 33 is installed on the pressing block 32, and the adjusting cylinder 34 is installed on the fixing frame 36 on the support plate 35 and its output end is connected to the top of the pressing rod 33 through the combination sleeve 37. By adjusting the output end of the cylinder 34, the pressing rod 33 can be accurately driven to push the pressing block 32 to extrude the molten material in the injection tube 13, thereby realizing stable and efficient injection molding into the molding mold 2, ensuring the smooth progress of the injection molding process and improving the molding quality of the product.

[0041] refer to Figure 2 and Figure 3In this embodiment, more specifically, the fixing frame 36 includes a fixing rod 361 fixedly connected to the support plate 35 and a stabilizing plate 362 supporting the adjusting cylinder 34. The stabilizing plate 362 is fixedly connected to the fixing rod 361. The outer sleeve of the combination sleeve 37 is provided with a limiting plate 371. Both sides of the limiting plate 371 penetrate and slide with the fixing rod 361. The fixing frame 36 is composed of the fixing rod 361 fixedly connected to the support plate 35 and the stabilizing plate 362 fixedly connected to the fixing rod 361 to support the adjusting cylinder 34. 362, this structure enhances the stability of the installation of the regulating cylinder 34, and can effectively reduce the shaking of the regulating cylinder 34 during operation; at the same time, the limiting plates on the outside of the combination sleeve 37 are penetrated and slidably connected with the fixed rod 361 on both sides, which can limit the movement of the combination sleeve 37, making the insertion process of the combination sleeve 37 and the top of the pressure rod 33 smoother and more accurate, ensuring the accuracy and stability of the action of the pressure rod 33 pushing the pressing block 32 to extrude the molten material in the injection tube 13, thereby improving the injection molding quality.

[0042] refer to Figure 7 In this embodiment, more specifically, an anti-blocking mechanism 4 is further included for preventing blockage in the injection molding tube 13. The anti-blocking mechanism 4 includes a protective tube 41 arranged at the bottom of the pressing block 32, a telescopic push rod 42 arranged in the protective tube 41, and a telescopic cylinder 43 for adjusting the telescopic push rod 42. The telescopic cylinder 43 is arranged above the interior of the protective tube 41, and a connecting piece 44 is provided at the output end of the telescopic cylinder 43. The connecting piece 44 is connected to one end of the telescopic push rod 42 to drive the telescopic push rod 42 to extend the nozzle of the injection molding tube 13. During the injection molding process, when the nozzle of the injection molding tube 13 is at risk of being blocked, the telescopic cylinder 43 located above the interior of the protective tube 41 is started, and its output end drives the telescopic push rod 42 to move in the protective tube 41 through the connecting piece 44 to achieve the extension operation of the nozzle of the injection molding tube 13, which can timely push away or loosen the material that may block the nozzle, effectively prevent the injection molding tube 13 from being blocked, ensure that the injection molding work of the injection molding machine can be carried out continuously and stably, and improve the injection molding efficiency and product quality.

[0043] refer to Figure 7 In this embodiment, more specifically, an elastic spherical pad 45 is provided on the outer end surface of the rod head of the telescopic push rod 42, and the outer surface of the elastic spherical pad 45 contacts the inner wall of the pipe nozzle of the injection molding tube 13. The elastic spherical pad 45 provided on the outer end surface of the rod head of the telescopic push rod 42 contacts the inner wall of the pipe nozzle of the injection molding tube 13, which can avoid the telescopic push rod 42 from directly contacting the inner wall of the pipe nozzle and causing wear, thereby protecting the inner wall of the pipe nozzle and the telescopic push rod 42 and extending the service life. At the same time, the elastic spherical pad 45 can better adapt to the shape of the inner wall of the pipe nozzle, effectively preventing the molten plastic from accumulating and clogging at the pipe nozzle, and ensuring the smooth progress of the injection molding process.

[0044] refer to Figure 7In this embodiment, more specifically, a sealing piece 46 is provided at the orifice of the protective tube 41, and the telescopic ejector rod 42 passes through the sealing piece 46. The sealing piece 46 does not affect the extension of the telescopic ejector rod 42, and can effectively prevent the molten plastic in the injection tube 13 from entering the interior of the protective tube 41, avoiding damage to the components related to the telescopic cylinder 43 or affecting its normal operation. At the same time, the sealing piece 46 does not hinder the extension action of the telescopic ejector rod 42, ensuring that the telescopic ejector rod 42 can smoothly realize the extension operation of the orifice of the injection tube 13, thereby ensuring the stable and reliable operation of the anti-blocking mechanism 4.

[0045] refer to Figure 2 In this embodiment, more specifically, lifting cylinders 14 are provided on both sides of the top of the carrier 11, and a connecting shaft 15 is provided at the output end of the lifting cylinder 14. The connecting shaft 15 is connected to the bottom of the support plate 35, and is used to lift the support plate 35 to drive the adjustment frame 31 to realize the lifting of the injection molding tube 13. When the lifting cylinder 14 is started, it can drive the support plate 35 to move up and down, and then the support plate 35 drives the adjustment frame 31 to realize the lifting of the injection molding tube 13, so as to accurately adjust the height position of the injection molding tube 13, better adapt to different injection molding operation scenarios and the height requirements of the molding mold 2, and improve the flexibility and adaptability of the injection molding operation.

[0046] refer to Figure 2 and Figure 5 In this embodiment, more specifically, sliding rods 16 are provided around the top of the carrier 11, and the sliding rods 16 pass through the support plate 35. The support plate 35 slides vertically with the sliding rods 16. Sliding sleeves 17 are provided around the bottom of the support plate 35 and corresponding to the outside of the sliding rods 16. The inner wall of the sliding sleeve 17 is slidably connected to the outside of the sliding rod 16. The setting of the sliding rod 16 and the sliding sleeve 17 provides a guiding effect for the lifting and lowering of the support plate 35, ensuring the stability and accuracy of the lifting process of the support plate 35, and thereby ensuring the stability of the adjustment frame 31 driving the injection tube 13 to lift and lower.

[0047] refer to Figure 1 and Figure 6In this embodiment, more specifically, it also includes a pushing mechanism 6 for pushing the molding mold 2 under the injection tube 13. The pushing mechanism 6 includes a receiving frame 61 for the bottom of the molding mold 2, a positioning block 62 arranged on the frame 1, and a pushing cylinder 63 installed on the positioning block 62. The output end of the pushing cylinder 63 is provided with a mounting block 64. The output end of the pushing cylinder 63 is connected to one side of the receiving frame 61 through the mounting block 64. The pushing mechanism 6 can automatically push the molding mold 2 to the bottom of the injection tube 13, and the receiving frame 61 is used to support the bottom of the molding mold 2. The pushing cylinder 63 is fixed with the help of the positioning block 62. The output end of the pushing cylinder 63 is connected to one side of the receiving frame 61 through the mounting block 64. The molding mold 2 can be accurately controlled to move to the appropriate position directly below the injection tube 13, ensuring that the injection molding work proceeds smoothly and improving the work efficiency and the accuracy of the injection molding position.

[0048] refer to Figure 9 In this embodiment, more specifically, a cooling mechanism 7 is provided in the receiving frame 61 for cooling the molding die 2 for molding. The cooling mechanism 7 includes a cooling circulation pipeline 71 provided inside the receiving frame 61 and a cold air delivery pump 72 provided in the frame 1. The cold air delivery pump 72 is provided on the cooling circulation pipeline 71. The cold air delivery pump 72 is connected to an external cold air source to provide cold air to the cooling circulation pipeline 71. Providing cold air to the cooling circulation pipeline 71 inside the receiving frame 61 can effectively cool the molding die 2, accelerate the cooling and solidification of the plastic in the molding die 2, thereby promoting the molding die 2 to complete the cooling molding, and improve the production efficiency and quality of the injection molded products.

[0049] refer to Figure 2 and Figure 5 In this embodiment, more specifically, a feeding mechanism 8 is further included. The feeding mechanism 8 is used to feed the injection tube 13. The feeding mechanism 8 includes a feeding pipe 81 arranged on the support plate 35 and a delivery pipe 82 arranged below the feeding pipe 81. The delivery pipe 82 and the side of the injection tube 13 are both provided with a connecting flange 83. The delivery pipe 82 is connected to the side of the injection tube 13 through the connecting flange 83, and is used to guide the molten plastic in the feeding pipe 81 to the injection tube 13 for injection molding operation.

[0050] The implementation principle of a vertical plunger BMC injection molding machine in an embodiment of the present application is as follows: through the coordinated work of various mechanisms, the shortcomings of existing injection molding machines in the pressing and injection processes are solved; the frame 1 and the carrier frame 11 provide a stable support structure for the entire injection molding process; the pressing mechanism 3 can accurately control the depth and force of the pressing material, thereby improving the quality of injection molding; the anti-blocking mechanism 4 effectively prevents the blockage of the injection molding tube 13, thereby ensuring the continuity of the injection molding process; the lifting mechanism and the pushing mechanism 6 facilitate the position adjustment of the injection molding tube 13 and the molding mold 2, thereby improving the flexibility of operation; the cooling mechanism 7 accelerates the cooling speed of the molding mold 2, thereby improving production efficiency.

[0051] Example 2, reference Figure 8 , the difference between this embodiment and the first embodiment is that: it also includes a buffer mechanism 5 for applying pressure buffer to the pressing block 32, the buffer mechanism 5 includes a pressure sensor 51 arranged on the top of the pressing block 32, a damper 52 arranged on the pressure rod 33 and a splicing block 53 connected to the damper 52, the pressure sensor 51 and the splicing block 53 are connected, and pressure is applied to the pressing block 32 through the pressure rod 33, and buffering and pressure value detection are performed through the damper 52 and the pressure sensor 51. When the pressure rod 33 applies pressure to the pressing block 32, the damper 52 of the buffer mechanism 5 can play a buffering role, reduce the impact force generated during the pressure application process, and avoid damage to the equipment or affecting the injection molding effect due to excessive pressure; at the same time, the pressure sensor 51 can detect the pressure value of the pressing block 32 in real time, so that the operator can accurately grasp the pressure situation, thereby better controlling the injection molding process and ensuring the stability of the injection molding quality.

[0052] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A vertical plunger BMC injection molding machine, characterized in that: include: A frame (1), wherein a carrier frame (11) is provided on the frame (1), a lifting hole (12) is provided through the carrier frame (11), and an injection tube (13) is provided at the lifting hole (12) for plastic injection molding; A molding die (2) is arranged on the frame (1) and is arranged below the injection molding tube (13); a cavity (21) is provided above the molding die (2) for injection molding; and A pressing mechanism (3) is used to press the molten plastic in the injection tube (13), and the pressing mechanism (3) includes an adjusting frame (31) arranged on the injection tube (13), a pressing block (32) arranged in the injection tube (13), a pressing rod (33) installed on the pressing block (32), and an adjusting cylinder (34) for adjusting the pressing depth of the pressing rod (33), a support plate (35) is provided on the top of the adjusting frame (31), and an adjusting hole (351) is provided through the support plate (35), and a top of the pressing rod (33) is provided with a pressure hole (351). The adjusting hole (351) is passed through, and a fixing frame (36) is provided on the support plate (35). The adjusting cylinder (34) is provided on the fixing frame (36). The output end of the adjusting cylinder (34) is provided with a combination sleeve (37). The combination sleeve (37) is driven by the output end of the adjusting cylinder (34) to be plugged into the top of the pressure rod (33), so that the pressure rod (33) pushes the pressing block (32) to extrude the molten material in the injection tube (13), so that the injection tube (13) is injection-molded in the molding die (2).

2. A vertical plunger BMC injection molding machine according to claim 1, characterized in that: The fixing frame (36) includes a fixing rod (361) fixedly connected to the support plate (35) and a stabilizing plate (362) supporting the regulating cylinder (34); the stabilizing plate (362) is fixedly connected to the fixing rod (361); a limiting plate (371) is provided on the outer sleeve of the combination sleeve (37); both sides of the limiting plate (371) penetrate and are slidably connected to the fixing rod (361).

3. A vertical plunger BMC injection molding machine according to claim 1, characterized in that: The invention also includes an anti-blocking mechanism (4) for preventing blockage in the injection molding tube (13). The anti-blocking mechanism (4) includes a protective tube (41) arranged at the bottom of the pressing block (32), a telescopic push rod (42) arranged in the protective tube (41), and a telescopic cylinder (43) for adjusting the telescopic push rod (42). The telescopic cylinder (43) is arranged above the interior of the protective tube (41). A connecting piece (44) is provided at the output end of the telescopic cylinder (43). The connecting piece (44) is connected to one end of the telescopic push rod (42) to drive the telescopic push rod (42) to extend the nozzle of the injection molding tube (13).

4. A vertical plunger BMC injection molding machine according to claim 3, characterized in that: An elastic spherical pad (45) is provided on the outer end surface of the rod head of the telescopic top rod (42), and the outer surface of the elastic spherical pad (45) contacts the inner wall of the tube mouth of the injection molding tube (13).

5. The vertical plunger BMC injection molding machine according to claim 3, characterized in that: A sealing sheet (46) is provided at the tube opening of the protection tube (41), the telescopic top rod (42) passes through the sealing sheet (46), and the sealing sheet (46) does not affect the extension of the telescopic top rod (42).

6. The vertical plunger BMC injection molding machine according to claim 1, characterized in that: The invention also includes a buffer mechanism (5) for applying pressure and buffering to the pressing block (32). The buffer mechanism (5) includes a pressure sensor (51) arranged on the top of the pressing block (32), a damper (52) arranged on the pressing rod (33), and a splicing block (53) connected to the damper (52). The pressure sensor (51) and the splicing block (53) are connected, and pressure is applied to the pressing block (32) through the pressing rod (33). The damper (52) and the pressure sensor (51) are used for buffering and pressure value detection.

7. The vertical plunger BMC injection molding machine according to claim 1, characterized in that: Lifting cylinders (14) are provided on both sides of the top of the carrier (11), and a connecting shaft (15) is provided at the output end of the lifting cylinder (14). The connecting shaft (15) is connected to the bottom of the support plate (35) and is used for lifting the support plate (35) to drive the adjustment frame (31) to achieve the lifting of the injection tube (13).

8. The vertical plunger BMC injection molding machine according to claim 1, characterized in that: Slide rods (16) are provided around the top of the carrier (11), and the slide rods (16) pass through the support plate (35). The support plate (35) and the slide rods (16) slide vertically. Slide sleeves (17) are provided around the bottom of the support plate (35) and corresponding to the outside of the slide rods (16). The inner wall of the slide sleeve (17) is slidably connected to the outside of the slide rod (16).

9. The vertical plunger BMC injection molding machine according to claim 1, characterized in that: It also includes a pushing mechanism (6) for pushing the molding die (2) below the injection molding tube (13), the pushing mechanism (6) including a receiving frame (61) for the bottom of the molding die (2), a positioning block (62) provided on the frame (1), and a pushing cylinder (63) mounted on the positioning block (62), the output end of the pushing cylinder (63) being provided with a mounting block (64), and the output end of the pushing cylinder (63) being connected to one side of the receiving frame (61) via the mounting block (64).

10. The vertical plunger BMC injection molding machine according to claim 9, characterized in that: A cooling mechanism (7) is provided in the receiving frame (61) for cooling the molding die (2) during molding. The cooling mechanism (7) comprises a cooling circulation pipeline (71) provided inside the receiving frame (61) and a cold air delivery pump (72) provided in the frame (1). The cold air delivery pump (72) is provided on the cooling circulation pipeline (71). The cold air delivery pump (72) is connected to an external cold air source to provide cold air to the cooling circulation pipeline (71).

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