An injection molding machine for the production and processing of rubber products

Abstract

The present invention discloses an injection molding machine for the production and processing of rubber products, which relates to the field of rubber injection molding. It includes a feeding component, an injection molding component, a stirring part and a bubble collection component. The feeding component includes a feeding hopper and a sieve plate. Different-sized sieve holes are provided on the surface of the sieve plate, and rubber raw materials enter the injection molding component through the sieve holes. A screw is contained in the injection molding component. The injection molding component includes a preheating section, a heating section and a feeding section. The sieve holes send large rubber raw materials to the front end of the preheating section and small rubber raw materials to the rear end of the preheating section. Heating rings are installed around the screw, and heat dissipation pipes are arranged outside the heating rings. The heat dissipation pipes wrap the injection molding component. The heating rings heat the solid raw materials into liquid raw materials. A stirring part is installed at one end of the screw to stir out the bubbles in the liquid raw materials. A bubble collection component is installed at the output end of the stirring part to collect the bubbles, prevent the gas from escaping and causing harm to the human body, and improve the molding quality of rubber products.

Description

Technical Field

[0001] The present invention relates to the technical field of rubber injection molding, and specifically relates to an injection molding machine for the production and processing of rubber products. Background Art

[0002] An injection molding machine is the main molding equipment that injects solid raw materials into a molding die after heating and liquefaction to make various shaped products. It injects the heated and liquefied raw materials into the closed mold cavity by means of the thrust of a screw. The raw materials in the mold gradually cool and solidify to obtain the finished product. Traditional injection molding machines need to heat different-sized solid raw materials at the same time. However, since the sizes of the solid raw materials are different, the heat required for liquefaction is also different, which results in a waste of a part of the energy. On one side of the output end of the traditional rubber injection molding machine, due to the lack of heat preservation facilities, the raw materials are prone to cooling and solidification during the storage period, and the heat dissipation of the heating device of the injection molding machine is serious. Bubbles are often generated when heating and liquefying rubber raw materials, resulting in poor quality of the molded products. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an injection molding machine for the production and processing of rubber products to improve problems such as large energy waste and poor molding effect of rubber products in the prior art.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions: An injection molding machine for the production and processing of rubber products, comprising:

[0005] A feeding assembly, the feeding assembly includes a feeding hopper and a sieve plate, and the surface of the sieve plate is provided with sieve holes;

[0006] An injection molding assembly, the rubber raw materials enter the injection molding assembly from the sieve holes. The injection molding assembly includes a screw drive motor, a screw, a stirring member, a check valve, a pushing head, a heating ring, a nozzle and a housing. The screw drive motor drives the screw to rotate. The blades of the screw drive the rubber raw materials to advance. A preheating section, a heating section and a feeding section are arranged between the screw and the housing. The heating ring heats the rubber raw materials into a liquid state. A stirring member is installed at one end of the screw. The stirring member is used for stirring the liquid rubber raw materials. A check valve is installed at one end of the stirring member. The stirred liquid rubber raw materials flow unidirectionally to one side of the pushing head. The pushing head pushes the liquid rubber raw materials to spray out from the nozzle;

[0007] Bubble collection assembly, the output end of the stirring member is installed with a bubble collection assembly, the bubble collection assembly includes an air inlet pipe, an air inlet fan, a deflector and a cooling tank, one side of the air inlet pipe is installed on the surface of the housing, the other side of the air inlet pipe is installed with an air inlet fan, the air inlet fan rotates to provide negative pressure for the air inlet pipe, the bubbles in the liquid rubber raw material are dispersed after being stirred by the stirring member, the dispersed gas flows into the air inlet pipe, the output end of the air inlet pipe is installed with a deflector, the deflector is used to guide the dispersed gas into the cooling tank, the cooling tank contains a coolant, the coolant cools and liquefies the gas, and a liquid outlet pipe is installed at the bottom of the cooling tank, and the liquefied gas flows out from the liquid outlet pipe;

[0008] Operating table, the injection molding assembly is installed on the surface of the operating table.

[0009] Preferably, a blanking assembly is installed between the feed hopper and the sieve plate. The blanking assembly includes a blanking cylinder, four groups of rotating plates, a scraper and a first motor. The first motor drives the rotating plates to rotate. One end of each rotating plate is installed with the scraper. The scraper fits and rotates on the inner wall of the blanking cylinder. The scraper is used to scrape off the rubber raw material attached to the inner wall of the blanking cylinder to prevent the rubber raw material from sticking to the inner wall of the blanking cylinder.

[0010] Preferably, the sieve plate surface is provided with sieve holes with gradually increasing inner diameters along the rotation direction of the rotating plate. Rubber raw materials of different sizes flow out from different sieve holes. The sieve holes send the large rubber raw materials to the front end of the preheating section, so that the large rubber raw materials have a longer preheating time to ensure the liquefaction of the large rubber raw materials, and send the small rubber raw materials to the rear end of the preheating section. The small rubber raw materials require less energy for liquefaction, reducing heat waste.

[0011] Preferably, a moving device is installed on one side of the screw driving motor. The moving device includes a second motor and a lead screw. A connecting block is installed at the bottom of the screw driving motor. The connecting block contains an internal thread. The second motor drives the lead screw to rotate. The lead screw drives the screw driving motor to move back and forth, thereby driving the screw and the pushing head to move back and forth to complete the injection of the liquid rubber raw material.

[0012] Preferably, a heat dissipation pipe is provided between the heating ring and the housing. The housing is made of heat-insulating material. The space stirred by the stirring member is the stirring space. A storage space is formed between the pushing head and the housing. The output end of the heat dissipation pipe is arranged in the stirring space and the storage space. The heat dissipation pipe is used to keep the space inside the stirring member and the storage space warm and heated. The heat dissipation pipe transfers the heat dissipated by the heating ring to the space of the stirring member to ensure that the liquid rubber remains liquid. When the stirring member stirs out the bubbles in the liquid rubber raw material, the dissipated gas remains liquid before entering the air inlet pipe, avoiding the re-liquefaction of the dissipated gas and affecting the molding quality of the rubber product. The heat dissipation pipe transfers the heat dissipated by the heating ring to the space of the storage component to ensure that the rubber raw material will not re-condense and solidify during storage, avoiding the situation of machine blockage.

[0013] Preferably, a heat dissipation pipe is provided on the inner wall of the air inlet pipe. The heat dissipation pipe on the inner wall of the air inlet pipe is connected to the heat dissipation pipe inside the housing. The heat dissipation pipe in the air inlet pipe prevents the dissipated gas from cooling and flowing back into the injection molding component, affecting the molding quality of the rubber product.

[0014] Preferably, a heat-insulating plate is provided between the air inlet pipe and the cooling tank to prevent the heat dissipation pipe on the inner wall of the air inlet pipe from affecting the temperature inside the cooling tank, ensuring that the dissipated gas is cooled into a liquid state and avoiding the harm of gas dissipation to the health of technicians.

[0015] Preferably, an air inlet valve is provided at the input end of the air inlet pipe. When the stirring member stirs the liquid rubber raw material, the air inlet valve is opened. After the liquid rubber raw material is stirred, the air inlet valve is closed to ensure that when injecting the liquid rubber raw material, the liquid rubber raw material will not contaminate the air inlet pipe through the air inlet valve.

[0016] Preferably, there are two groups of L-shaped stirring members symmetrically arranged along the screw. The rotation of the screw drives the stirring members to rotate. The stirring members can fully stir the liquid rubber raw material. The stirred liquid rubber raw material enters the side of the pushing head through the check valve, and the dissipated gas enters the bubble collection component.

[0017] Beneficial effects: The present invention provides an injection molding machine for the production and processing of rubber products. The feeding assembly can send solid rubber raw materials of different sizes to different positions of the preheating section for heating, reducing energy loss. The heat dissipation pipe dissipates the energy dissipated by the heating ring into the stirring member and the storage space, and utilizes the heat dissipated by the heating ring for the heat preservation and heating of the liquid rubber raw materials in the space where the stirring member is located and the storage space, increasing the energy utilization rate and ensuring that the liquid rubber raw materials will not condense and solidify. The stirring member stirs out the bubbles in the liquid rubber raw materials, and the bubble collection assembly collects the dissipated bubbles, avoiding the harm of the dissipated gas to the human body and improving the molding quality of the rubber products. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings are used to provide a further understanding of the present invention, 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 to the present invention.

[0019] In the drawings:

[0020] Figure 1 is the overall schematic diagram of the injection molding machine for the production and processing of rubber products of the present invention.

[0021] Figure 2 is the schematic diagram of the feeding assembly of the present invention.

[0022] Figure 3 is the schematic diagram of the bubble collection assembly and the stirring member of the present invention.

[0023] Reference numerals in the drawings: 1, feeding hopper; 2, blanking cylinder; 3, injection molding assembly; 4, bubble collection assembly; 5, operation table; 6, second motor; 7, heating ring; 8, heat dissipation pipe; 9, housing; 10, screw driving motor; 11, connecting block; 12, lead screw; 13, stirring member; 14, pushing head; 15, nozzle; 16, screw; 17, stirring space; 18, check valve; 19, first motor; 20, rotating plate; 21, scraper; 22, sieve plate; 23, sieve holes; 24, deflector; 25, intake fan; 26, cooling tank; 27, liquid outlet pipe; 28, intake valve; 29, intake pipe; 30, heat insulation plate; 31, storage space. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following text is only used to describe an implementation manner of an injection molding machine for the production and processing of rubber products of the present invention, and does not strictly limit the scope of protection of the specific requests of the present invention.

[0025] In addition, if the embodiments of the present invention involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0026] Embodiment: As Figures 1-3 shown, an injection molding machine for the production and processing of rubber products includes:

[0027] A feeding assembly, as Figure 2 shown, the feeding assembly includes a feeding hopper 1 and a sieve plate 22, and the surface of the sieve plate 22 is provided with sieve holes 23;

[0028] An injection molding assembly 3, as Figure 1 shown, the rubber raw material enters the injection molding assembly 3 from the sieve holes 23. The injection molding assembly 3 includes a screw drive motor 10, a screw 16, a stirring member 13, a check valve 18, a pushing head 14, a heating ring 7, a nozzle 15 and a housing 9. The screw drive motor 10 drives the screw 16 to rotate, the blades of the screw 16 drive the rubber raw material to advance. A preheating section, a heating section and a feeding section are arranged between the screw 16 and the housing 9. The heating ring 7 heats the solid rubber raw material into a liquid state. A stirring member 13 is installed at one end of the screw 16, and the stirring member 13 is used for stirring the liquid rubber raw material. A check valve 18 is installed at one end of the stirring member 13, and the stirred liquid rubber raw material flows unidirectionally to one side of the pushing head 14. The pushing head 14 pushes the liquid rubber raw material to be ejected from the nozzle 15;

[0029] A bubble collection assembly 4, as Figure 3 shown, the output end of the stirring member 13 is installed with a bubble collection assembly 4. The bubble collection assembly 4 includes an air inlet pipe 29, an air intake fan 25, a deflector 24 and a cooling tank 26. One side of the air inlet pipe 29 is installed on the surface of the housing 9, and the other side of the air inlet pipe 29 is installed with the air intake fan 25. The rotation of the air intake fan 25 provides negative pressure for the air inlet pipe 29. The bubbles in the liquid rubber raw material are dispersed after being stirred by the stirring member 13, and the dispersed gas flows into the air inlet pipe 29. A deflector 24 is installed at the output end of the air inlet pipe 29, and the deflector 24 is used for guiding the dispersed gas to the cooling tank 26. The cooling tank 26 contains a coolant, and the coolant cools and liquefies the gas. A liquid discharge pipe 27 is installed at the bottom of the cooling tank 26, and the liquefied gas is discharged from the liquid discharge pipe 27;

[0030] An operating table 5, as Figure 1 shown, the injection molding assembly 3 is installed on the surface of the operating table 5.

[0031] In the embodiment, asFigure 2 As shown, a blanking component is installed between the feed hopper 1 and the sieve plate 22. The blanking component includes a blanking cylinder 2, four groups of rotating plates 20, a scraper 21, and a first motor 19. The first motor 19 drives the rotating plates 20 to rotate. One end of each group of rotating plates 20 is equipped with the scraper 21. The scraper 21 rotates while adhering to the inner wall of the blanking cylinder 2. The scraper 21 is used to scrape off the rubber raw materials adhering to the inner wall of the blanking cylinder 2, preventing the rubber raw materials from sticking to the inner wall of the blanking cylinder 2.

[0032] In the embodiment, as Figure 2 shown, the sieve plate 22 has sieve holes 23 with gradually increasing inner diameters along the rotation direction of the rotating plates 20. Rubber raw materials of different sizes flow out from different sieve holes 23. The sieve holes 23 send large rubber raw materials to the front end of the preheating section, enabling the large rubber raw materials to have a longer preheating time to ensure liquefaction. Small rubber raw materials are sent to the rear end of the preheating section. Small rubber raw materials require less energy for liquefaction, reducing heat waste.

[0033] In the embodiment, as Figure 1 shown, a moving device is installed on one side of the screw driving motor 10. The moving device includes a second motor 6 and a lead screw 12. A connecting block 11 is installed at the bottom of the screw driving motor 10. The connecting block 11 contains internal threads. The second motor 6 drives the lead screw 12 to rotate, and the lead screw 12 drives the screw driving motor 10 to move back and forth, thereby driving the screw 16 and the pushing head 14 to move back and forth to complete the injection of liquid rubber raw materials.

[0034] In the embodiment, as Figure 1 shown, a heat dissipation pipe 8 is arranged between the heating ring 7 and the housing 9. The housing 9 is made of heat-insulating material. The space stirred by the stirring member 13 is the stirring space 17. A storage space 31 is formed between the pushing head 14 and the housing 9. The output end of the heat dissipation pipe 8 is arranged in the stirring space 17 and the storage space 31. The heat dissipation pipe 8 is used to keep the space inside the stirring member 13 and the storage space 31 warm. The heat dissipation pipe 8 transfers the heat dissipated by the heating ring 7 to the space of the stirring member 13 to ensure that the liquid rubber remains liquid. When the stirring member 13 stirs out the bubbles in the liquid rubber raw materials, it makes the dissipated gas remain liquid before entering the air inlet pipe 29, preventing the dissipated gas from re-liquefying and affecting the molding quality of rubber products. The heat dissipation pipe 8 transfers the heat dissipated by the heating ring 7 to the space of the storage component to ensure that during the storage period, the rubber raw materials will not re-condense and solidify, avoiding blockage of the machine.

[0035] In the embodiment, as Figure 1As shown, a heat dissipation pipe 8 is provided on the inner wall of the intake pipe 29. The heat dissipation pipe 8 on the inner wall of the intake pipe 29 is connected to the heat dissipation pipe 8 in the housing 9. The heat dissipation pipe 8 in the intake pipe 29 prevents the cooled reflux of the escaping gas into the injection molding assembly 3 and affects the molding quality of the rubber product.

[0036] In the embodiment, as Figure 3 shown, a heat insulation plate 30 is provided between the intake pipe 29 and the cooling tank 26 to prevent the heat dissipated by the heat dissipation pipe 8 on the inner wall of the intake pipe 29 from affecting the temperature in the cooling tank 26, ensuring that the escaping gas is cooled into a liquid state and avoiding harm to the body of the technical personnel caused by the gas escape.

[0037] In the embodiment, as Figure 3 shown, an intake valve 28 is provided at the input end of the intake pipe 29. When the stirring member 13 stirs the liquid rubber raw material, the intake valve 28 is opened. After the liquid rubber raw material is stirred, the intake valve 28 is closed to ensure that when injecting the liquid rubber raw material, the liquid rubber raw material does not contaminate the intake pipe 29 through the intake valve 28.

[0038] In the embodiment, as Figure 3 shown, there are two sets of stirring members 13 which are L-shaped and symmetric along the screw 16. The rotation of the screw 16 drives the rotation of the stirring members 13. The stirring members 13 can fully stir the liquid rubber raw material. The stirred liquid rubber raw material enters the storage space 31 through the check valve 18, and the escaping gas enters the bubble collection assembly 4.

[0039] When the present invention is in use, the solid rubber raw material enters the blanking cylinder 2 from the feed hopper 1. The first motor 19 drives the rotating plate 20 to rotate clockwise. When the rotating plate 20 drives the raw material to rotate to the bottom of the blanking cylinder 2, the bottom sieve plate 22 is provided with sieve holes 23 with gradually increasing inner diameters along the rotating direction of the rotating plate 20. Solid rubbers with different particle sizes enter the injection molding assembly 3 through the sieve holes 23. The sieve holes 23 send the large rubber raw materials to the front end of the preheating section and the small rubber raw materials to the rear end of the preheating section. The screw driving motor 10 drives the screw 16 to rotate. The heating rings 7 are evenly arranged at equal intervals around the screw 16. When the solid rubber raw material passes through the preheating section, the heating section, and the feeding section, the heating rings 7 gradually convert the solid rubber raw material into a liquid rubber raw material. The liquid rubber raw material flows to the stirring space 17. The stirring member 13 stirs out the bubbles in the liquid rubber raw material in the stirring space 17. The dissipated gas is sucked by the bubble collecting assembly 4. The stirred liquid rubber raw material flows into the storage space 31 through the check ring and is sprayed out by the spray head 15 through the pushing head 14. The heat dissipated by the heating rings 7 heats and keeps warm the stirring space 17 and the storage space 31 through the heat dissipation pipe 8, avoiding the re-condensation and solidification of the liquid rubber and affecting the operation of the machine, and improving the forming quality of the rubber products.

[0040] Finally, it should be noted that the above are only preferred examples of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An injection molding machine for producing and processing rubber products, characterized in that: include: A feed assembly, the feed assembly comprising a feed hopper and a sieve plate, the sieve plate surface having sieve holes, the sieve plate surface is provided with sieve holes with gradually increasing inner diameters, and rubber raw materials of different sizes flow out from different sieve holes; An injection molding component, wherein the rubber raw material enters the injection molding component from the sieve hole, and the injection molding component comprises a screw drive motor, a screw, a stirring member, a check valve, a push head, a heating ring, a nozzle and a housing. The screw drive motor drives the screw to rotate, and the blades of the screw drive the rubber raw material forward. A preheating section, a heating section and a feeding section are arranged between the screw and the housing. The sieve hole delivers large pieces of rubber raw material to the front end of the preheating section and delivers small pieces of rubber raw material to the rear end of the preheating section. The heating ring heats the rubber raw material into a liquid state. A stirring member is installed at one end of the screw, and the stirring member is used to stir the liquid rubber raw material. A check valve is installed at one end of the stirring member. The stirred liquid rubber raw material flows unidirectionally to one side of the push head, and the push head pushes the liquid rubber raw material to be ejected from the nozzle; A bubble collecting component is installed at the output end of the stirring member, and the bubble collecting component includes an air intake pipe, an air intake fan, a guide plate and a cooling tank. One side of the air intake pipe is installed on the surface of the shell, and the other side of the air intake pipe is installed with an air intake fan. The air intake fan rotates to provide negative pressure for the air intake pipe. Bubbles in the liquid rubber raw material escape after being stirred by the stirring member, and the escaped gas flows into the air intake pipe. A guide plate is installed at the output end of the air intake pipe, and the guide plate is used to guide the escaped gas into the cooling tank. The cooling tank contains a coolant, and the coolant cools and liquefies the gas. A liquid outlet pipe is installed at the bottom of the cooling tank, and the liquefied gas flows out from the liquid outlet pipe; A heat dissipation pipe is arranged between the heating ring and the shell, the shell is made of heat-insulating material, the space stirred by the stirring element is the stirring space, the pushing head and the shell form a material storage space, the output end of the heat dissipation pipe is arranged in the stirring space and the material storage space, the heat dissipation pipe is used to heat and insulate the space in the stirring element and the material storage space, a heat dissipation pipe is arranged on the inner wall of the air intake pipe, the heat dissipation pipe on the inner wall of the air intake pipe is connected to the heat dissipation pipe in the shell, and the heat dissipation pipe in the air intake pipe is used to prevent the escaped gas from cooling and flowing back to the injection molding component; An operating table, wherein the injection molding component is installed on the surface of the operating table.

2. The injection molding machine for producing and processing rubber products according to claim 1, characterized in that: A material discharge assembly is installed between the feed hopper and the screen plate, and the material discharge assembly includes a material discharge barrel, four groups of rotating plates, a scraper and a first motor. The first motor drives the rotating plates to rotate, and the scraper is installed at one end of each group of rotating plates. The scraper is attached to the inner wall of the material discharge barrel and rotates. The scraper is used to scrape off the rubber raw material attached to the inner wall of the material discharge barrel.

3. The injection molding machine for producing and processing rubber products according to claim 1, characterized in that: A moving device is installed on one side of the screw drive motor, and the moving device includes a second motor and a screw rod. A connecting block is installed at the bottom of the screw drive motor, and the connecting block contains an internal thread. The second motor drives the screw rod to rotate, and the screw rod drives the screw drive motor to move forward and backward, thereby driving the screw and the pushing head to move forward and backward.

4. The injection molding machine for producing and processing rubber products according to claim 1, characterized in that: A heat insulation board is arranged between the air intake pipe and the cooling tank.

5. The injection molding machine for producing and processing rubber products according to claim 1, characterized in that: An air intake valve is arranged at the input end of the air intake pipe. When the stirring member stirs the liquid rubber raw material, the air intake valve is opened. After the stirring of the liquid rubber raw material is completed, the air intake valve is closed.

6. The injection molding machine for producing and processing rubber products according to claim 1, characterized in that: The stirring element is two groups of L-shaped elements symmetrically arranged along the screw. The rotation of the screw drives the stirring element to rotate. The stirred liquid rubber raw material enters one side of the push head through the check valve, and the escaped gas enters the bubble collection component.

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