Injection molding machine capable of reducing heat transfer

Abstract

The utility model provides an injection molding machine capable of reducing heat transfer, which comprises an injection molding mounting seat and an injection molding cylinder, a fixing piece is arranged in the middle of the injection molding cylinder, the part of the injection molding cylinder positioned above the fixing piece extends into the injection molding mounting seat, and the fixing piece is mounted on the injection molding mounting seat; a through groove extending in the radial direction of the injection molding material cylinder is formed in the bottom face of the injection molding installation base, the bottom face of the through groove is an opening, and the top face of the fixing piece is in contact with the bottom face of the injection molding installation base except the position located in the through groove. By means of the structure, heat of the injection molding material cylinder can be prevented from being transmitted to the injection molding installation base, heat loss of the injection molding material cylinder is reduced, meanwhile, the temperature of the injection molding installation base can be reduced, and therefore the accident that workers are scalded is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, in particular to an injection molding machine capable of reducing heat transfer. Background Art

[0002] A vertical injection molding machine is a mechanical molding device widely used in the fields of building materials, electromechanics, automobiles, packaging, etc. With the help of the injection system, a certain amount of material is heated and plasticized within a specified time. The molten material is then injected into the mold cavity through the screw at a certain pressure and speed.

[0003] In the patent document with Chinese patent application number 202121536663.7 and announcement date of 2022.01.18, a new type of ceramic vertical injection molding machine is disclosed, including an injection tube and a support table. A feed hopper, a support plate, a tightening nut, and a feed conduit are provided on the left side of the upper end of the injection tube. A first drive motor is provided above the injection tube, and the output end of the first drive motor is fixedly connected to one end of the screw, and the screw is located in the injection tube. This new type of ceramic vertical injection molding machine can preheat the raw material by setting a preheating heating resistance coil, and the melted paraffin will lubricate the screw in advance, thereby reducing the wear of the ceramic powder on the screw. The temperature in the injection tube can be monitored by the set heating resistance temperature sensor, thereby improving the safe operation of the machine and extending its service life. By adding a discharge port, the raw material can be removed conveniently when the machine fails to repair, and the raw material flow can be controlled by the installed feed control plug-in board.

[0004] The injection molding machine has an injection tube in close contact with the frame. Thus, when in use, since a heating device is provided on the outer wall of the injection tube, when the heating device heats the injection tube and the material in the injection tube, the heat of the injection tube is easily transferred to the frame, causing the temperature on the frame to be very high. This may cause a scalding accident if the staff accidentally touches it. In addition, the heat on the injection tube is easily dissipated. When the same temperature is required to heat the material, the heating time will be long, which is not conducive to the heating of the material.

[0005] In addition, if Figure 1As shown, a mounting hole 61 is provided on the injection molding mounting seat 6, and the upper end of the injection molding cylinder 7 extends into the mounting hole 61. A flange 71 is provided on the injection molding cylinder 7, and the upper surface of the flange contacts the bottom surface of the injection molding mounting seat 6. An extrusion screw 8 is installed in the injection molding cylinder 7, and a heating ring 9 is sleeved on the outer wall of the lower end of the injection molding cylinder 7. When the heating ring 9 is working, it can heat the injection molding cylinder 7, thereby heating and plasticizing the material in the injection molding cylinder 7. In this structure, since the flange 71 is in contact with the bottom surface of the injection molding mounting seat except for the position of the mounting hole, it was found during the test that the temperature of the injection molding mounting seat is relatively high, and the temperature of the injection molding mounting seat is basically equivalent to the temperature at the flange. When the temperature of the lower end of the injection molding cylinder is much higher than the temperature at the flange, the temperature difference between the upper and lower parts of the injection molding cylinder is large, and the heating of the material is uneven. At the same time, a lot of heat is dissipated on the injection molding cylinder, and the temperature of the injection molding mounting seat is high, which has a great impact on the safety performance of the operator. Summary of the Invention

[0006] The purpose of the utility model is to provide an injection molding machine that reduces heat transfer. By utilizing the structure of the utility model, the heat transfer from the injection molding cylinder to the injection molding mounting seat can be reduced, the heat loss of the injection molding cylinder can be reduced, and the temperature on the injection molding mounting seat can be lowered, thereby preventing accidents of scalding of workers.

[0007] To achieve the above-mentioned purpose, an injection molding machine for reducing heat transfer includes an injection molding mounting seat and an injection molding cylinder, a fixing piece is provided in the middle of the injection molding cylinder, the part of the injection molding cylinder located above the fixing piece extends into the injection molding mounting seat, and the fixing piece is installed on the injection molding mounting seat; a through groove extending along the radial direction of the injection molding cylinder is provided on the bottom surface of the injection molding mounting seat, the bottom surface of the through groove is open, and the top surface of the fixing piece is in contact with the bottom surface of the injection molding mounting seat except for the position located in the through groove.

[0008] The above structure is provided with a through groove at the lower end of the injection molding mounting seat, so that when the injection molding cylinder is installed on the injection molding mounting seat through the fixing piece, a space is formed between the through groove and the fixing piece. On the one hand, the fixing piece and the injection molding mounting seat will not be completely fitted together, but there will be a certain space, thereby reducing the heat from the injection molding cylinder to the injection molding mounting seat. On the other hand, the space formed enables the injection molding cylinder to be located above the fixing piece and at the position of the through groove to form an air duct. The airflow in the air duct can take away the heat transferred from the injection molding cylinder to the injection molding mounting seat. Therefore, the heat of the injection molding cylinder can be reduced from being transferred toward the injection molding mounting seat, reducing the heat loss of the injection molding cylinder and at the same time reducing the temperature on the injection molding mounting seat, thereby ensuring that the staff will not be easily scalded when accidentally touching the injection molding machine.

[0009] Furthermore, the fixing member is a flange, which makes it easy to install the injection molding cylinder.

[0010] Furthermore, a mounting hole is provided on the injection molded mounting base, and the portion of the injection molded plastic cylinder located above the fixing member extends into the mounting hole. The width of the through-groove is greater than the diameter of the mounting hole. This creates air ducts at the through-grooves on either side of the mounting hole, which facilitates air convection in the ducts, further facilitating heat removal from above the fixing member, thereby further reducing the temperature of the injection molded mounting base.

[0011] Furthermore, a feed port communicating with the mounting hole is provided on the side of the injection molding mounting seat, and a notch is provided on the portion of the injection molding barrel located above the fixing piece, the notch communicating with the feed port, so that the material can be easily fed into the injection molding barrel through the feed port and the notch.

[0012] Furthermore, an extrusion screw is provided in the injection molding barrel, and the upper end of the extrusion screw passes through the injection molding mounting seat.

[0013] Furthermore, it also includes a frame, on which an upper template is arranged through a column, a first drive is arranged on the upper template, an injection molding mounting seat is arranged on the first drive, a second drive is arranged on the injection molding mounting seat, an upper seat is arranged on the second drive, and a third drive is arranged on the upper seat.

[0014] Furthermore, a lower template is provided on the frame below the upper template.

[0015] Furthermore, a clamping mechanism connected to the lower end of the column is provided in the frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the connection between the injection molding mounting base and the injection molding cylinder in the prior art.

[0017] Figure 2 It is a structural diagram of a vertical injection molding machine.

[0018] Figure 3 This is a structural diagram of the injection molding mounting base of the present invention.

[0019] Figure 4 for Figure 2 Enlarged view of point A in the middle.

[0020] Figure 5 This is a schematic diagram of the bottom of the injection-molded mounting base of the present invention.

[0021] Figure 6 This is a three-dimensional diagram of the injection molding barrel and extrusion screw.

[0022] Figure 7 This is an exploded view of the injection molding barrel and extrusion screw.

[0023] Figure 8 This is the front view of the injection molding barrel and extrusion screw.

[0024] Figure 9 A top view of the injection molding barrel and extrusion screw.

[0025] Figure 10 for Figure 9 Middle BB cross-section view.

[0026] Figure 11 This is a cross-sectional view of the injection molding barrel, extrusion screw, and injection molding mount.

[0027] Figure 12 Schematic diagram of the injection molding barrel, extrusion screw and injection molding mounting base. DETAILED DESCRIPTION

[0028] The present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods.

[0029] like Figures 2 to 5 As shown, in this embodiment, a vertical injection molding machine is used for illustration. The injection molding machine for reducing heat transfer includes a frame 1, a lower template 2 is installed at the upper end of the frame 1, and columns 3 are respectively slidably passed through the four corners of the frame 1. A locking mechanism connected to the lower end of the column 1 is provided in the frame 1. In the present utility model, the locking mechanism is an existing structure and is not described here. An upper template 4 is fixed at the upper end of the column 3 above the lower template 2, and a first drive 51 is installed on the upper template 4. In the present utility model, the first drive 51 is a first oil cylinder or a first air cylinder, and an injection molding mounting seat 6 is installed at the upper end of the first drive 51. A second drive 52 is installed on the injection molding mounting seat 6. In the present utility model, the second drive 52 is a second oil cylinder or a second air cylinder, and an upper seat 53 is installed at the upper end of the second drive. A third drive 54 is installed on the upper seat 53. In the present utility model, the third drive is a motor.

[0030] like Figure 3 and Figure 5 As shown, a mounting hole 61 is provided on the injection molding mounting seat 6, and a through groove 62 extending along the radial direction of the injection molding cylinder is provided on the bottom surface of the injection molding mounting seat 6. The bottom surface of the through groove 62 is an opening, and a feed port 62 connected to the mounting hole 61 is provided on the side of the injection molding mounting seat 6. The feed port 62 on the injection molding mounting seat 6 is used to install a hopper. When material such as plastic is added into the hopper, the material enters the injection molding cylinder from the hopper through the feed port 62.

[0031] like Figure 2 、 Figures 6 to 12As shown, an injection molding barrel 7 is installed on the mounting hole 61, and the middle part of the injection molding barrel 7 has a fixing part. In the present utility model, the fixing part is a flange 71, which is fixed to the injection molding mounting seat 6 by bolts. The portion 72 of the injection molding barrel 7 located above the flange 71 extends into the mounting hole 61 of the injection molding mounting seat. A notch 73 is provided in the portion 72 of the injection molding barrel 7 located above the flange 71. The notch 73 is connected to the feed port 63, so that the material can smoothly enter the injection molding barrel from the feed port 63. An extrusion screw 8 is provided in the injection molding barrel 7. The upper end of the extrusion screw 8 passes through the injection molding mounting seat and is connected to the output shaft of the third drive. In this way, when the third drive is working, it can drive the extrusion screw 8 to rotate, and the rotating extrusion screw shears the material and conveys the material. The first drive is to drive the injection molding mounting seat 6 to move so that the injection nozzle of the injection molding barrel is close to the mold. The second drive is to drive the extrusion screw to move axially, and the axially moving extrusion screw extrude the plasticized material into the injection molding barrel.

[0032] The top surface of flange 71, except where the through-slot is located, contacts the bottom surface of injection molded mounting base 6. The width of through-slot 62 is greater than the diameter of mounting hole 61. This creates air ducts at the through-slots on either side of the mounting hole, facilitating air convection in these ducts, further dissipating heat from above the fixture and reducing the temperature of the injection molded mounting base.

[0033] like Figure 11 As shown, a heating ring 9 is provided on the outer wall of the lower end of the plastic injection cylinder 7, and the heating ring 9 is used to heat the plastic injection cylinder, thereby achieving the purpose of plasticizing the material in the plastic injection cylinder. Figure 11 and Figure 12 As shown, by setting a through groove 62 at the lower end of the injection molding mounting seat 6, when the injection molding barrel 7 is installed on the injection molding mounting seat 6 through the flange 71, a space is formed between the through groove 62 and the flange 71. On the one hand, the fixing part and the injection molding mounting seat will not be completely fitted, but there will be a certain amount of space, thereby reducing the heat transfer from the injection molding barrel to the injection molding mounting seat. On the other hand, the space formed allows the injection molding barrel to be located above the fixing part and at the position of the through groove to form an air duct. The air flow F in the air duct can take away the heat transferred from the injection molding barrel 7 to the injection molding mounting seat 6. Therefore, the heat transfer from the injection molding barrel to the injection molding mounting seat can be reduced, reducing the heat loss of the injection molding barrel. At the same time, the temperature on the injection molding mounting seat can be reduced, thereby ensuring that the staff will not be easily burned when accidentally touching the injection molding machine. Through testing, it was found that with the above structure, the temperature difference between the lower end of the injection molding barrel and the temperature at the flange is small, and the temperature at the flange is much lower than the temperature on the injection molding mounting seat.

Claims

1. An injection molding machine for reducing heat transfer, comprising an injection molding mounting base and an injection molding barrel, wherein a fixing member is provided in the middle of the injection molding barrel, a portion of the injection molding barrel above the fixing member extends into the injection molding mounting base, and the fixing member is mounted on the injection molding mounting base; characterized in that: A through groove extending along the radial direction of the injection molding cylinder is provided on the bottom surface of the injection molding mounting seat. The bottom surface of the through groove is open. The top surface of the fixing piece contacts the bottom surface of the injection molding mounting seat except at the position of the through groove.

2. The injection molding machine for reducing heat transfer according to claim 1, characterized in that: The fixing member is a flange.

3. The injection molding machine for reducing heat transfer according to claim 1, characterized in that: A mounting hole is provided on the injection molding mounting seat, and the portion of the injection molding cylinder located above the fixing piece extends into the mounting hole; the width of the through groove is greater than the diameter of the mounting hole.

4. The injection molding machine for reducing heat transfer according to claim 3, characterized in that: A material inlet communicated with the mounting hole is provided on the side of the injection molding mounting seat; a notch is provided on the portion of the injection molding cylinder located above the fixing piece, and the notch is communicated with the material inlet.

5. The injection molding machine for reducing heat transfer according to claim 1, characterized in that: An extrusion screw is arranged in the plastic injection molding cylinder, and the upper end of the extrusion screw passes through the injection molding mounting seat.

6. The injection molding machine for reducing heat transfer according to claim 1, characterized in that: It also includes a frame, on which an upper template is arranged through a column, a first drive is arranged on the upper template, an injection molding mounting seat is arranged on the first drive, a second drive is arranged on the injection molding mounting seat, an upper seat is arranged on the second drive, and a third drive is arranged on the upper seat.

7. The injection molding machine for reducing heat transfer according to claim 6, characterized in that: A lower template is arranged on the frame below the upper template.

8. The injection molding machine for reducing heat transfer according to claim 6, characterized in that: A clamping mechanism connected to the lower end of the column is arranged in the frame.

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