A magnesium alloy injection molding machine screw anti-adhesion mechanism

Abstract

The utility model discloses a magnesium alloy injection molding machine screw anti -sticking material mechanism relates to magnesium alloy product processing technical field. This magnesium alloy injection molding machine screw anti -sticking material mechanism, including supporting base, segmented temperature control subassembly and air curtain generating subassembly, the top fixed mounting of supporting base has organism, and the one side fixed mounting of organism has injection material cylinder, segmented temperature control subassembly sets up the top of supporting base, and segmented temperature control subassembly includes installation cavity and heating rod, and the inner wall fixed mounting of installation cavity has the heating rod of multiple groups equidistance distribution, and air curtain generating subassembly sets up the top of supporting base, and air curtain generating subassembly includes annular hollow block, jet small hole and connecting box. The high pressure inert gas is jetted in the clearance of injection material cylinder and spiral rod, forms a layer of air curtain, and this layer of air curtain can isolate magnesium alloy melt and the direct contact of spiral rod surface, need no longer frequent shutdown dismounts spiral rod and carries out the cleaning, improves the production efficiency of device, and reduces the labor intensity and production cost.

Description

Technical Field

[0001] This utility model relates to the field of magnesium alloy product processing technology, and in particular to a screw anti-sticking mechanism for a magnesium alloy injection molding machine. Background Technology

[0002] Chinese patent document CN118492327A discloses a magnesium alloy injection molding machine, including a housing with supporting legs fixedly installed at the bottom and a feed inlet connected to the top. A partition is fixedly installed inside the housing, and a heating mechanism is located on the right side of the partition. This invention involves pouring magnesium alloy particles into a heating chamber through the feed inlet. The heating chamber heats the magnesium alloy to a semi-solid state. Simultaneously, a first motor is activated to rotate a rotating rod, which in turn rotates a stirring rod to stir the magnesium alloy, ensuring uniform heating and improving heating efficiency. Then, a cylinder is activated to move a sealing plate to the right, opening the connecting pipe and allowing the semi-solid magnesium alloy to fall into a feeding cylinder for conveying. This device separates the heating and feeding of the magnesium alloy, ensuring sufficient heating and avoiding impact on subsequent molding quality.

[0003] When using the aforementioned magnesium alloy injection molding machine, the magnesium alloy melt has strong adhesion and easily adheres to the surface of the screw. It usually requires stopping the machine to disassemble the screw and cleaning it by manual scraping or chemical solvent cleaning. This not only affects production efficiency but also increases labor intensity and production costs. Frequent disassembly may also lead to a decrease in the fitting accuracy between the screw and the barrel, affecting the overall performance of the injection molding machine. Utility Model Content

[0004] The purpose of this utility model is to provide a screw anti-sticking mechanism for magnesium alloy injection molding machines. This mechanism solves the problem that, during the use of magnesium alloy injection molding machines, the molten magnesium alloy has strong adhesive properties and easily adheres to the screw surface. This usually requires stopping the machine to disassemble the screw and cleaning it manually or with chemical solvents. This not only affects production efficiency but also increases labor intensity and production costs. Frequent disassembly may also lead to a decrease in the fitting accuracy between the screw and the barrel, affecting the overall performance of the injection molding machine.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a screw anti-sticking mechanism for a magnesium alloy injection molding machine, comprising a support base, a segmented temperature control component, and an air curtain generating component. A machine body is fixedly installed on the top of the support base, and an injection cylinder is fixedly installed on one side of the machine body. The segmented temperature control component is located above the support base and includes an installation cavity and heating rods. Multiple sets of equidistantly distributed heating rods are fixedly installed on the inner wall of the installation cavity. The air curtain generating component is located above the support base and includes an annular hollow block, air jet holes, and a connecting box. The inner wall of the injection cylinder is fixedly connected to the outer wall of the annular hollow block. Multiple sets of annularly distributed air jet holes are opened on the inner wall of the annular hollow block. A connecting box is fixedly installed on the outer wall of the annular hollow block, and the connecting box communicates with the interior of the annular hollow block.

[0006] Preferably, the segmented temperature control assembly further includes a spiral rod, with one end of the spiral rod rotatably connected to the inner wall of one side of the machine body, and the other end of the spiral rod extending into the interior of the injection cylinder. The mounting cavity is opened inside the spiral rod, which can precisely adjust the heating power in segments according to the temperature requirements of different parts of the spiral rod, ensuring that the surface temperature of the spiral rod is always within the range where magnesium alloy does not easily adhere, and reasonably adjust the heating intensity according to the temperature of the melt.

[0007] Preferably, the air curtain generating assembly further includes a resistance wire, an air inlet pipe, a pipe joint, and a gas flow regulating valve. Resistance wires are fixedly installed on the inner walls of the front and rear sides of the connecting box. The top of the connecting box extends to the outside of the injection cylinder and is fixedly connected to one end of the air inlet pipe. A pipe joint is fixedly installed at the other end of the air inlet pipe. A gas flow regulating valve is provided on the outer wall of the air inlet pipe to spray high-pressure inert gas into the gap between the injection cylinder and the screw rod, forming an air curtain. This air curtain can isolate the magnesium alloy melt from direct contact with the surface of the screw rod, eliminating the need for frequent machine shutdowns to disassemble and clean the screw rod. This improves the production efficiency of the device, reduces labor intensity and production costs, minimizes the decrease in the fitting accuracy between the screw and the barrel, and ensures the overall performance of the injection molding machine.

[0008] Preferably, multiple heaters are fixedly installed on the top of the support base, and the interior of the heaters is fixedly connected to the outer wall of the injection cylinder.

[0009] Preferably, a motor is fixedly installed on one side of the machine body, and the output shaft of the motor is fixedly connected to one end of the screw rod.

[0010] Preferably, a feed pipe is fixedly installed on the top of the machine body, and the feed pipe is connected to the interior of the machine body.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This anti-sticking mechanism for the screw of a magnesium alloy injection molding machine, through the coordinated use of the screw, mounting cavity, and heating rod, can precisely adjust the heating power in segments according to the temperature requirements of different parts of the screw, ensuring that the surface temperature of the screw is always within the range where magnesium alloy does not easily adhere. The heating intensity can be adjusted reasonably according to the temperature of the melt. Through the coordinated use of an annular hollow block, air jet holes, connecting box, resistance wire, air inlet pipe, pipe joint, and gas flow regulating valve, high-pressure inert gas is injected into the gap between the injection barrel and the screw, forming an air curtain. This air curtain isolates the magnesium alloy melt from direct contact with the screw surface, eliminating the need for frequent machine shutdowns and screw disassembly for cleaning. This improves the production efficiency of the device, reduces labor intensity and production costs, minimizes the decrease in the fitting accuracy between the screw and the barrel, and ensures the overall performance of the injection molding machine. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the injection cylinder of this utility model; Figure 3 This is a three-dimensional structural diagram of the screw rod of this utility model; Figure 4 This is a schematic diagram of the three-dimensional structure of the annular hollow block of this utility model.

[0013] Reference numerals in the attached drawings: 1. Support base; 2. Machine body; 3. Injection cylinder; 4. Segmented temperature control assembly; 401. Screw rod; 402. Mounting cavity; 403. Heating rod; 5. Air curtain generating assembly; 501. Annular hollow block; 502. Air jet orifice; 503. Connecting box; 504. Resistance wire; 505. Air inlet pipe; 506. Pipe joint; 507. Gas flow regulating valve; 6. Heater; 7. Motor; 8. Feed pipe. Detailed Implementation

[0014] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0015] Please see Figure 1-4This utility model provides a technical solution: a screw anti-sticking mechanism for a magnesium alloy injection molding machine, comprising a support base 1, a segmented temperature control component 4, and an air curtain generating component 5. A body 2 is fixedly installed on the top of the support base 1, and an injection cylinder 3 is fixedly installed on one side of the body 2. The segmented temperature control component 4 is disposed above the support base 1 and includes an installation cavity 402 and heating rods 403. Multiple sets of equidistantly distributed heating rods 403 are fixedly installed on the inner wall of the installation cavity 402. The air curtain generating component 5 is disposed above the support base 1 and includes an annular hollow block 501, air jet holes 502, and a connecting box. 503, the inner wall of the injection cylinder 3 is fixedly connected to the outer wall of the annular hollow block 501. The inner wall of the annular hollow block 501 has multiple sets of annularly distributed air jet holes 502. The outer wall of the annular hollow block 501 is fixedly installed with a connecting box 503, which is connected to the interior of the annular hollow block 501. The top of the support base 1 is fixedly installed with multiple sets of heaters 6, and the interior of the heaters 6 is fixedly connected to the outer wall of the injection cylinder 3. A motor 7 is fixedly installed on one side of the machine body 2, and the output shaft of the motor 7 is fixedly connected to one end of the screw rod 401. The top of the machine body 2 is fixedly installed with a feed pipe 8, which is connected to the interior of the machine body 2.

[0016] Secondly, the segmented temperature control component 4 also includes a spiral rod 401. One side of the inner wall of the machine body 2 is rotatably connected to one end of the spiral rod 401, and the other end of the spiral rod 401 extends into the interior of the injection cylinder 3. The mounting cavity 402 is opened inside the spiral rod 401, which can accurately adjust the heating power in segments according to the temperature requirements of different parts of the spiral rod 401, ensuring that the surface temperature of the spiral rod 401 is always within the range where magnesium alloy does not easily adhere, and reasonably adjust the heating intensity according to the temperature of the melt.

[0017] Furthermore, the air curtain generating assembly 5 also includes a resistance wire 504, an air inlet pipe 505, a pipe joint 506, and a gas flow regulating valve 507. The resistance wire 504 is fixedly installed on the inner walls of the front and rear sides of the connecting box 503. The top of the connecting box 503 extends to the outside of the injection cylinder 3 and is fixedly connected to one end of the air inlet pipe 505. The other end of the air inlet pipe 505 is fixedly installed with a pipe joint 506. The outer wall of the air inlet pipe 505 is provided with a gas flow regulating valve 507, which sprays high-pressure inert gas into the gap between the injection cylinder 3 and the screw rod 401 to form an air curtain. This air curtain can isolate the magnesium alloy melt from direct contact with the surface of the screw rod 401, eliminating the need for frequent shutdowns to disassemble the screw rod 401 for cleaning. This improves the production efficiency of the device, reduces labor intensity and production costs, minimizes the decrease in the fitting accuracy between the screw and the barrel, and ensures the overall performance of the injection molding machine.

[0018] Working principle: When in use, the magnesium alloy raw material is put into the machine body 2 through the feed pipe 8. The motor 7 is turned on to drive the screw 401 to rotate, so that the magnesium alloy raw material is conveyed in the injection cylinder 3. The heating rod 403 is turned on to heat the screw 401 in sections, and the temperature of different parts of the screw 401 is controlled. For example, at the end near the hopper, since the initial temperature of the material is low, the heating power is appropriately increased so that the surface temperature of the screw 401 is always within the range where magnesium alloy does not easily adhere. The inert gas is connected to the inert gas conveying pipeline through the pipe joint 506, and inert gases such as nitrogen are introduced into the connecting box 503 through the air inlet pipe 505. The gas flow rate and pressure are precisely adjusted by the gas flow regulating valve 507. The inert gas in the connecting box 503 is heated by the resistance wire 504 and enters the annular hollow block 501. It is sprayed out through the various jet holes 502 into the gap between the injection cylinder 3 and the screw 401 to form a layer of air curtain. This layer of air curtain can isolate the magnesium alloy melt from direct contact with the screw surface as much as possible.

[0019] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A screw anti-sticking mechanism for a magnesium alloy injection molding machine, characterized in that, include: Support base (1), the body (2) is fixedly installed on the top of the support base (1), and the injection cylinder (3) is fixedly installed on one side of the body (2). The segmented temperature control component (4) is located above the support base (1). The segmented temperature control component (4) includes an installation cavity (402) and heating rods (403). Multiple sets of equally spaced heating rods (403) are fixedly installed on the inner wall of the installation cavity (402). An air curtain generating assembly (5) is disposed above a support base (1). The air curtain generating assembly (5) includes an annular hollow block (501), jet holes (502) and a connecting box (503). The inner wall of the injection cylinder (3) is fixedly connected to the outer wall of the annular hollow block (501). Multiple sets of annularly distributed jet holes (502) are opened on the inner wall of the annular hollow block (501). The connecting box (503) is fixedly installed on the outer wall of the annular hollow block (501). The connecting box (503) is connected to the interior of the annular hollow block (501).

2. The anti-sticking mechanism for the screw of a magnesium alloy injection molding machine according to claim 1, characterized in that: The segmented temperature control assembly (4) also includes a screw rod (401), one side of the inner wall of the machine body (2) is rotatably connected to one end of the screw rod (401), the other end of the screw rod (401) extends into the interior of the injection cylinder (3), and the mounting cavity (402) is opened inside the screw rod (401).

3. The anti-sticking mechanism for the screw of a magnesium alloy injection molding machine according to claim 2, characterized in that: The air curtain generating assembly (5) also includes a resistance wire (504), an air inlet pipe (505), a pipe joint (506), and a gas flow regulating valve (507). The resistance wire (504) is fixedly installed on the inner walls of the front and rear sides of the connecting box (503). The top of the connecting box (503) extends to the outside of the injection cylinder (3) and is fixedly connected to one end of the air inlet pipe (505). The other end of the air inlet pipe (505) is fixedly installed with a pipe joint (506). The outer wall of the air inlet pipe (505) is provided with a gas flow regulating valve (507).

4. The anti-sticking mechanism for the screw of a magnesium alloy injection molding machine according to claim 3, characterized in that: Multiple heaters (6) are fixedly installed on the top of the support base (1), and the interior of the heaters (6) is fixedly connected to the outer wall of the injection cylinder (3).

5. The anti-sticking mechanism for the screw of a magnesium alloy injection molding machine according to claim 4, characterized in that: A motor (7) is fixedly installed on one side of the body (2), and the output shaft of the motor (7) is fixedly connected to one end of the screw rod (401).

6. The anti-sticking mechanism for the screw of a magnesium alloy injection molding machine according to claim 5, characterized in that: The top of the machine body (2) is fixedly installed with a feed pipe (8), which is connected to the interior of the machine body (2).

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