Injection molding equipment and production method of rubber modified foamed shoe material

Abstract

The present invention relates to an injection molding device for a rubber modified foamed shoe material applied to the field of shoe material injection molding and a production method thereof, comprising a mounting seat, an injection molding mold mounted on the mounting seat, and a mixed injection molding structure with an injection molding tube fixed at the lower end, the injection molding mold comprising an upper mold seat and a lower mold seat, a containing box fixedly connected to the lower end of the lower mold seat, the cavities of the containing box and the lower mold seat are both filled with a demoulding agent, an agent inlet and outlet hole is provided on the lower mold seat, an adding adjustment mechanism is installed in the lower mold seat, the above-mentioned containing box and adding adjustment mechanism are adopted to realize that the molded shoe material is easy to demould, and it is not easy to produce the phenomenon of sticking, tearing, etc., and smooth demoulding is ensured while improving the qualified rate of finished products, and the demoulding agent is filled in the cavity of the lower mold seat and the containing box to assist in cooling the shoe material and the lower mold seat, without setting an additional cooling channel and filling an additional cooling medium, which is more convenient to use and also reduces the production cost during injection molding.

Description

Technical Field

[0001] The invention relates to an injection molding device and a production method thereof, in particular to an injection molding device for a rubber modified foamed shoe material applied in the field of shoe material injection molding and a production method thereof. Background Art

[0002] Foaming material refers to a foaming material that can gasify inside the material to produce bubbles to make it a porous material. Rubber modified foaming is based on pure natural rubber, combined with other raw materials, adding a specific foaming agent, and then hot-pressing to obtain the product. The new rubber foaming technology uses one-time injection molding technology, which reduces labor, saves costs, and is simple to operate. It is widely used in the manufacturing of shoe materials, luggage linings, toy materials and other industries.

[0003] However, the traditional shoe material production process is inconvenient to demould and the rubber modified foaming has poor fluidity, so it does not meet the use requirements.

[0004] In order to solve the above problems, the Chinese patent CN212636358U specification discloses a rubber modified foaming shoe material production device, which relates to the field of shoe material production technology, and solves the existing problems of inconvenient demoulding and poor fluidity of rubber modified foaming in the shoe material production process. An injection cylinder is arranged below the storage box, and a shoe material forming mechanism is arranged below the injection cylinder. The shoe material forming mechanism includes a fixed mold seat and a movable mold seat, and a shoe material forming cavity is arranged between the fixed mold seat and the movable mold seat. A servo motor is installed at the upper end of the injection cylinder, and a conveying rod is installed inside the injection cylinder, and the conveying rod is connected to the servo motor through a coupling, and a resistance wire is arranged inside the conveying rod, and a spiral blade is arranged outside the conveying rod, a feed port is arranged between the storage box and the injection cylinder, and an injection channel is arranged between the injection cylinder and the shoe material forming mechanism.

[0005] Although the above-mentioned rubber modified foamed shoe material production device (i.e., injection molding equipment) can achieve the effect of automatic demoulding, it is only provided with an auxiliary demoulding mechanism on the movable mold base (i.e., the lower mold base), and no auxiliary demoulding structure is provided between the shoe material and the upper mold base (fixed mold base). Therefore, the smooth separation (demolding) between the shoe material and the upper mold base after molding cannot be guaranteed, which may cause the shoe material to stick and be difficult to remove or tear during demoulding, resulting in damage to the shoe material and affecting the qualified rate of finished products. If the demoulding agent is directly applied manually, on the one hand, the workload of the staff is increased and the labor cost is increased. On the other hand, the manual application cannot ensure the uniformity of the demoulding agent, so a good demoulding agent coating effect cannot be achieved, which will also have an adverse effect on demoulding.

[0006] In addition, the above-mentioned rubber modified foamed shoe material production device also needs to be equipped with additional cooling pipes on the upper and lower mold bases, and needs to be equipped with additional pipes and circulation pumps and other equipment, which increases the complexity and cost of the equipment, thereby increasing the equipment cost and production cost during use (energy consumption and cooling medium consumption, etc.), which brings a burden to the company's production. Summary of the invention

[0007] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is how to design an injection molding device for rubber modified foamed shoe materials that can automatically and evenly apply a release agent to ensure the qualified rate of the product, while being able to remove additional cooling medium and supporting additional equipment while retaining the cooling effect, thereby reducing equipment costs and production costs.

[0008] In order to solve the above problems, the present invention provides an injection molding device for rubber modified foamed shoe materials, comprising a mounting seat, an injection molding mold mounted on the mounting seat, and a mixed injection molding structure with an injection molding tube fixed at the lower end, the mixed injection molding structure is used to uniformly mix the modified foamed rubber raw material for making the shoe material and inject it into the injection molding mold on the mounting seat through the injection molding tube, the injection molding mold comprises an upper mold seat fixed to the mounting seat and a lower mold seat arranged at an adjustable distance from the upper mold seat, a mold cavity is arranged on one side of the upper mold seat and the lower mold seat close to each other, the injection molding tube is fixed to the middle part of the upper mold seat and the injection molding port at the lower end of the injection molding tube is connected to the mold cavity of the upper mold seat, a first hydraulic cylinder driving the lower mold seat to rise and fall and close or open the mold with the upper mold seat is also installed on the mounting seat, and a demolding component for auxiliary demolding is installed on the mounting seat and the lower mold seat;

[0009] The lower end of the lower mold base is fixedly connected with a receiving box which is in communication with the cavity in the lower mold base. The cavity in the receiving box and the lower mold base is filled with a release agent. The lower mold base is provided with an inlet and outlet hole for the release agent to enter the mold cavity.

[0010] The lower die base is provided with an adding adjustment mechanism for squeezing the release agent from the inlet and outlet holes into the cavities of the upper die base and the lower die base. When the adding adjustment mechanism is reset, the release agent in the cavities of the upper die base and the lower die base flows back into the cavities of the containing box and the lower die base through the inlet and outlet holes.

[0011] A second hydraulic cylinder for driving the adding adjustment mechanism to move is installed at the lower end of the containing box. The second hydraulic cylinder is fixed to the bottom surface of the containing box and the end of the piston rod of the first hydraulic cylinder through a connecting assembly.

[0012] In the injection molding equipment and production method of the rubber modified foamed shoe material, the first hydraulic cylinder is first used to control the lower mold base to rise and close the mold with the upper mold base, so that the mold cavity of the upper mold base and the lower mold base forms a shoe material mold cavity; then, the mold release agent in the cavity of the receiving box and the lower mold base is squeezed into the shoe material mold cavity from the inlet and outlet holes through the adding adjustment mechanism. When the mold release agent fills the shoe material mold cavity, the adding adjustment mechanism is reset, so that the mold release agent in the shoe material mold cavity flows back to the cavity of the lower mold base and the receiving box through the inlet and outlet holes again, completing the uniform application of the mold release agent, thereby facilitating the automatic and uniform application of the mold release agent in the mold cavity. Compared with manual application, the application effect is better;

[0013] The modified foam rubber raw material is mixed by using a mixed injection molding structure, and the mixed modified foam rubber is injected into the shoe material mold cavity through an injection molding tube; after the modified foam rubber is cooled, the shoe material mold cavity is filled and the shoe material is formed, at this time, the first hydraulic cylinder is used to drive the lower mold base to descend and open the mold with the upper mold base, and when the lower mold base descends after the mold opening, the demoulding component ejects the shoe material in the lower mold base, completing the demoulding operation and completing the injection molding of the shoe material;

[0014] The use of a demolding component in combination with a demolding agent can make it easier to demold the molded shoe material without causing sticking, tearing, etc., thereby ensuring smooth demolding while improving the cost qualification rate. At the same time, filling the demolding agent in the cavity of the lower mold base and the containing box can assist in cooling the shoe material and the lower mold base, speeding up the cooling speed, without the need to set up additional cooling channels or fill additional cooling media, making it more convenient to use and reducing the production cost during injection molding.

[0015] As a further supplement to the present application, the added adjustment mechanism includes a liquid pushing plate and an adjustment rod, the liquid pushing plate is slidably connected to the inner wall of the receiving box, and the upper end of the piston rod of the second hydraulic cylinder movably penetrates the bottom wall of the receiving box and is fixed to the bottom surface of the liquid pushing plate;

[0016] The adjusting rod is a telescopic rod body with adjustable length. The lower end of the adjusting rod is fixed on the liquid pushing plate, and the upper end of the adjusting rod is formed with a blocking piece for blocking the inlet and outlet holes of the agent.

[0017] As a further supplement to the present application, the adjusting rod includes a fixed rod and a movable sleeve rod, the lower end of the fixed rod is fixed to the upper end of the liquid pusher plate, the movable sleeve rod is movably sleeved on the upper part of the fixed rod, and the blocking piece and the upper end of the movable sleeve rod are integrally formed;

[0018] A fourth spring is installed in the movable sleeve rod, and the upper and lower ends of the fourth spring are respectively fixed to the inner top wall of the movable sleeve rod and the upper end surface of the fixed rod.

[0019] As a further supplement to the present application, a second limit stop ring is fixed to the inner top wall of the cavity of the lower mold base, the second limit stop ring is movably sleeved on the outside of the movable sleeve rod and the inner diameter of the second limit stop ring is the same as the outer diameter of the movable sleeve rod, and the outer diameter of the second limit stop ring is larger than the outer diameter of the sealing piece.

[0020] As a further supplement to the present application, an annular collecting groove is provided on the peripheral side of the bottom wall of the mold cavity of the lower mold base, and the inlet and outlet holes are provided on the bottom wall of the collecting groove.

[0021] As a further supplement to the present application, an annular cooling cavity is provided in the upper die seat, and a top wall of the die cavity of the upper die seat is provided with a feed port connected to the cooling cavity;

[0022] A blocking structure for blocking the inlet is arranged in the inlet, and the blocking structure is used to control the movement of the demoulding agent from the mold cavity of the upper mold base to the cooling cavity. The blocking structure is also used to automatically close the inlet after the cooling cavity is filled with the demoulding agent.

[0023] As a further supplement to this application, the blocking structure includes:

[0024] An expansion groove is provided on the bottom wall of the cooling cavity and is connected to the feed port, and the inner diameter of the expansion groove is larger than the inner diameter of the feed port;

[0025] The first blocking block is a T-shaped block with a larger upper portion and a smaller lower portion, wherein the upper end of the first blocking block is consistent with the shape and size of the expansion groove and is movably plugged into the expansion groove, and the lower end of the first blocking block is consistent with the shape and size of the feed port and is movably plugged into the feed port;

[0026] The first spring has upper and lower ends respectively fixed to the top wall in the cooling cavity and the upper end of the first blocking block.

[0027] As a further supplement to the present application, the demoulding assembly includes a fixed ejector rod, a movable ejector rod and a third spring, the fixed ejector rod is fixed on the mounting seat, the upper end of the movable ejector rod movably penetrates the bottom wall of the receiving box and extends into the cavity of the lower mold seat, the upper and lower ends of the movable ejector rod are fixed with ejector plates, the third spring is movably sleeved on the lower part of the movable ejector rod, and the upper and lower ends of the third spring are respectively fixed to the bottom surface of the receiving box and the upper surface of the ejector plate at the lower end;

[0028] The bottom surface of the mold cavity of the lower mold base is provided with a demoulding hole connected with the cavity of the lower mold base, and the demoulding hole is consistent with the shape and size of the top sheet and is movably connected with the top sheet;

[0029] A first limit stop ring is fixed to the top wall of the cavity of the lower die seat. The first limit stop ring is movably sleeved on the movable ejector rod. The inner diameter of the first limit stop ring is the same as the diameter of the movable ejector rod, and the outer diameter of the first limit stop ring is greater than the diameter of the ejector plate.

[0030] As a further supplement to the present application, the connection assembly includes a mounting block, a support rod and a connection plate, the mounting block is fixedly sleeved on the second hydraulic cylinder, the support rod is fixed on the mounting block and the upper end is fixed to the bottom surface of the receiving box;

[0031] The lower end of the support rod extends downward and is fixed to the upper surface of the connecting plate, and the bottom surface of the connecting plate is fixed to the upper end of the piston rod of the first hydraulic cylinder;

[0032] A support guide rod is fixed on the upper end of the mounting seat, and the upper end of the support guide rod slides through the lower die seat and is fixed to the upper die seat.

[0033] The present invention also provides an injection molding production method for a rubber modified foamed shoe material, which is applied to the injection molding equipment for the above-mentioned rubber modified foamed shoe material, and comprises the following steps:

[0034] S1, first use the first hydraulic cylinder to control the lower die base to rise and close the mold with the upper die base, so that the mold cavity of the upper die base and the lower die base form a shoe material mold cavity;

[0035] S2, then, the mold release agent in the cavity of the receiving box and the lower mold base is squeezed into the shoe material mold cavity from the inlet and outlet holes through the adding adjustment mechanism. When the mold release agent fills the shoe material mold cavity, the adding adjustment mechanism is reset, so that the mold release agent in the shoe material mold cavity flows back to the cavity of the lower mold base and the receiving box through the inlet and outlet holes again, completing the uniform coating of the mold release agent;

[0036] S3, using a mixed injection molding structure to mix the modified foam rubber raw material, and injecting the mixed modified foam rubber into the shoe material mold cavity through an injection molding tube;

[0037] S4. After the modified foam rubber is cooled, it fills the shoe material mold cavity and forms the shoe material. At this time, the first hydraulic cylinder is used to drive the lower mold base to descend and open the mold with the upper mold base. When the lower mold base descends after the mold opening, the demoulding assembly ejects the shoe material in the lower mold base to complete the demoulding operation and complete the injection molding of the shoe material.

[0038] In summary, firstly, the first hydraulic cylinder is used to control the lower mold base to rise and close the mold with the upper mold base, so that the mold cavities of the upper mold base and the lower mold base form a shoe material mold cavity; then, the mold release agent in the cavity of the receiving box and the lower mold base is squeezed into the shoe material mold cavity from the inlet and outlet holes through the adding adjustment mechanism, and when the mold release agent fills the shoe material mold cavity, the adding adjustment mechanism is reset, so that the mold release agent in the shoe material mold cavity flows back to the cavity of the lower mold base and the receiving box through the inlet and outlet holes again, completing the uniform coating of the mold release agent, thereby facilitating the automatic and uniform coating of the mold release agent in the mold cavity, and the coating effect is better than manual coating;

[0039] The modified foam rubber raw material is mixed by using a mixed injection molding structure, and the mixed modified foam rubber is injected into the shoe material mold cavity through an injection molding tube; after the modified foam rubber is cooled, the shoe material mold cavity is filled and the shoe material is formed, at this time, the first hydraulic cylinder is used to drive the lower mold base to descend and open the mold with the upper mold base, and when the lower mold base descends after the mold opening, the demoulding component ejects the shoe material in the lower mold base, completing the demoulding operation and completing the injection molding of the shoe material;

[0040] The use of a demolding component in combination with a demolding agent can make it easier to demold the molded shoe material without causing sticking, tearing, etc., thereby ensuring smooth demolding while improving the qualified rate of finished products. At the same time, filling the demolding agent in the cavity of the lower mold base and the containing box can assist in cooling the shoe material and the lower mold base, speeding up the cooling speed without setting up additional cooling channels or filling additional cooling media. This makes it more convenient to use and also reduces the production cost during injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a schematic diagram of the overall structure when the stirring injection molding structure is omitted in the first embodiment of the present application;

[0042] Figure 2 This is a front cross-sectional view of the upper die base and the lower die base of the first embodiment of the present application;

[0043] Figure 3 for Figure 2 A magnified view of the structure at center;

[0044] Figure 4 for Figure 2 A magnified view of the structure at B in the middle;

[0045] Figure 5 for Figure 2 A magnified view of the structure at C in the middle;

[0046] Figure 6 This is a partial cross-sectional view of the adjustment rod of the first embodiment of the present application;

[0047] Figure 7 This is a state diagram of extruding the mold release agent in the first embodiment of the present application so that the mold release agent enters the shoe material mold cavity and the cooling cavity;

[0048] Figure 8 This is a state diagram of the first embodiment of the present application when demolding using a demolding assembly.

[0049] Description of the numbers in the figure:

[0050] 1. Mounting seat; 101. Support guide rod; 2. Upper die seat; 201. Cooling chamber; 202. Inlet port; 203. Expansion slot; 204. First blocking block; 205. First spring; 3. Lower die seat; 301. Accommodation box; 302. Demolding hole; 303. First limit stop ring; 304. Collecting tank; 305. Inlet and outlet holes; 306. Second limit stop ring; 4. Injection tube; 5. First hydraulic cylinder; 6. Demolding assembly; 601, fixed ejector pin; 602, movable ejector pin; 6021, ejector plate; 603, third spring; 7, connecting assembly; 701, mounting block; 702, support rod; 703, connecting plate; 8, second hydraulic cylinder; 9, adding adjustment mechanism; 901, liquid push plate; 902, adjustment rod; 9021, fixed rod; 9022, movable sleeve rod; 9023, blocking plate; 903, fourth spring. DETAILED DESCRIPTION

[0051] An implementation method of the present application is described in detail below with reference to the accompanying drawings.

[0052] The first implementation method:

[0053] The present invention provides an injection molding device for rubber modified foamed shoe materials. Figure 1 , Figure 2 and Figure 5 , including a mounting seat 1, an injection molding mold mounted on the mounting seat 1, and a mixed injection molding structure with an injection molding tube 4 fixed at the lower end, the mixed injection molding structure is used to uniformly mix the modified foam rubber raw material for making shoe materials and inject it into the injection molding mold on the mounting seat 1 through the injection molding tube 4, the injection molding mold includes an upper mold seat 2 fixed to the mounting seat 1 and a lower mold seat 3 adjustable from the upper mold seat 2, a mold cavity is provided on the side where the upper mold seat 2 and the lower mold seat 3 are close to each other, the injection molding tube 4 is fixed to the middle part of the upper mold seat 2 and the lower end injection molding port of the injection molding tube 4 is connected to the mold cavity of the upper mold seat 2, the mounting seat 1 is also equipped with a first hydraulic cylinder 5 that drives the lower mold seat 3 to rise and fall to close or open the mold with the upper mold seat 2, and a demolding component 6 for auxiliary demolding is installed on the mounting seat 1 and the lower mold seat 3;

[0054] The lower end of the lower mold base 3 is fixedly connected with a receiving box 301 which is connected with the cavity in the lower mold base 3. The receiving box 301 and the cavity in the lower mold base 3 are filled with a release agent. The lower mold base 3 is provided with an inlet and outlet hole 305 for the release agent to enter the mold cavity.

[0055] The lower mold base 3 is provided with an adding adjustment mechanism 9 for squeezing the mold release agent from the inlet and outlet holes 305 into the mold cavities of the upper mold base 2 and the lower mold base 3. When the adding adjustment mechanism 9 is reset, the mold release agent in the mold cavities of the upper mold base 2 and the lower mold base 3 flows back into the cavities of the containing box 301 and the lower mold base 3 through the inlet and outlet holes 305.

[0056] A second hydraulic cylinder 8 for driving the adding adjustment mechanism 9 to move is installed at the lower end of the containing box 301 . The second hydraulic cylinder 8 is fixed to the bottom surface of the containing box 301 and the end of the piston rod of the first hydraulic cylinder 5 through a connecting assembly 7 .

[0057] Based on the above structure, firstly, the first hydraulic cylinder 5 is used to control the lower mold base 3 to rise and close the mold with the upper mold base 2, so that the mold cavity of the upper mold base 2 and the lower mold base 3 forms a shoe material mold cavity; then, the mold release agent in the cavity of the receiving box 301 and the lower mold base 3 is squeezed into the shoe material mold cavity from the inlet and outlet holes 305 by adding the adjusting mechanism 9. When the mold release agent fills the shoe material mold cavity, the adding adjusting mechanism 9 is reset, so that the mold release agent in the shoe material mold cavity flows back to the cavity of the lower mold base 3 and the receiving box 301 through the inlet and outlet holes 305 again, completing the uniform application of the mold release agent, thereby facilitating the automatic and uniform application of the mold release agent in the mold cavity. Compared with manual application, the application effect is better;

[0058] The modified foam rubber raw material is mixed by using a mixed injection molding structure, and the mixed modified foam rubber is injected into the shoe material mold cavity through an injection molding tube 4; after the modified foam rubber is cooled, it fills the shoe material mold cavity and forms the shoe material. At this time, the first hydraulic cylinder 5 is used to drive the lower mold base 3 to descend and open the mold with the upper mold base 2. When the lower mold base 3 descends after the mold opening, the demoulding component 6 ejects the shoe material in the lower mold base 3, completing the demoulding operation and completing the injection molding of the shoe material;

[0059] The use of the demolding component 6 in combination with the demolding agent can make it easier to demold the molded shoe material, and it is not easy to cause sticking, tearing and the like, thereby ensuring smooth demolding while improving the qualified rate of finished products. At the same time, filling the demolding agent in the cavity of the lower mold base 3 and the containing box 301 can assist in cooling the shoe material and the lower mold base 3, speeding up the cooling speed, without the need to set up additional cooling channels and fill additional cooling media, making it more convenient to use and reducing the production cost during injection molding.

[0060] Figure 2 and Figure 5 The adding adjustment mechanism 9 is shown to include a liquid pushing plate 901 and an adjustment rod 902. The liquid pushing plate 901 is slidably connected to the inner wall of the receiving box 301. The upper end of the piston rod of the second hydraulic cylinder 8 movably penetrates the bottom wall of the receiving box 301 and is fixed to the bottom surface of the liquid pushing plate 901.

[0061] The adjusting rod 902 is a telescopic rod with adjustable length. The lower end of the adjusting rod 902 is fixed on the liquid pushing plate 901 , and the upper end of the adjusting rod 902 is formed with a blocking piece 9023 for blocking the inlet and outlet holes 305 .

[0062] When the piston rod of the second hydraulic cylinder 8 is extended, the liquid pushing plate 901 and the adjusting rod 902 are driven to rise, and the liquid pushing plate 901 squeezes the release agent in the cavity of the receiving box 301 and the lower mold base 3. At the same time, when the adjusting rod 902 rises, the blocking piece 9023 is separated from the inlet and outlet holes 305, so that the release agent enters the shoe material cavity composed of the mold cavity of the upper mold base 2 and the lower mold base 3 through the inlet and outlet holes 305 from the cavity of the receiving box 301 and the lower mold base 3, and finally fills the shoe material cavity. Then, the second hydraulic cylinder 8 The piston rod contracts, driving the liquid push plate 901 and the adjusting rod 902 to descend, thereby losing the squeezing effect on the release agent and forming a negative pressure in the cavity of the containing box 301 and the lower mold base 3, so that the release agent in the shoe material mold cavity flows back to the cavity of the containing box 301 and the lower mold base 3 through the inlet and outlet holes 305 again; and the blocking piece 9023 at the upper end of the adjusting rod 902 enters the inlet and outlet holes 305 again to form a seal, so as to achieve the purpose of automatically and evenly applying the release agent.

[0063] Figure 2 , Figure 5 and Figure 6 The adjusting rod 902 includes a fixed rod 9021 and a movable sleeve rod 9022. The lower end of the fixed rod 9021 is fixed to the upper end of the liquid pushing plate 901. The movable sleeve rod 9022 is movably sleeved on the upper part of the fixed rod 9021. The blocking piece 9023 is integrally formed with the upper end of the movable sleeve rod 9022.

[0064] A fourth spring 903 is installed in the movable sleeve rod 9022 , and upper and lower ends of the fourth spring 903 are respectively fixed to the inner top wall of the movable sleeve rod 9022 and the upper end surface of the fixed rod 9021 .

[0065] When the liquid pushing plate 901 rises, it drives the fixed rod 9021 to rise. When the fixed rod 9021 rises, the movable sleeve rod 9022 is supported by the fourth spring 903 and pushed to rise synchronously, so that the blocking piece 9023 at the upper end of the movable sleeve rod 9022 is separated from the inlet and outlet holes 305, so that the release agent can be squeezed out from the inlet and outlet holes 305. When the blocking piece 9023 abuts against the top wall of the mold cavity of the upper mold base 2, the fixed rod 9021 continues to rise and squeezes the fourth spring 903, so that the fourth spring 903 contracts, so that the liquid pushing plate 901 can continue to rise and squeeze the release agent, ensuring that enough release agent can enter the shoe material mold cavity through the inlet and outlet holes 305, thereby ensuring a uniform coating effect.

[0066] Figure 5-Figure 6It is shown that a second limit stop ring 306 is fixed to the top wall of the cavity of the lower mold base 3. The second limit stop ring 306 is movably sleeved on the outside of the movable sleeve rod 9022 and the inner diameter of the second limit stop ring 306 is the same as the outer diameter of the movable sleeve rod 9022. The outer diameter of the second limit stop ring 306 is larger than the outer diameter of the blocking piece 9023. The setting of the second limit stop ring 306 makes the blocking piece 9023 finally stay in the inlet and outlet hole 305 when the movable sleeve rod 9022 descends, ensuring the formation of a seal while facilitating the subsequent injection of modified foam rubber material into the shoe material mold cavity without squeezing the blocking piece 9023 downward, thereby avoiding the inlet and outlet hole 305 from opening to cause material infiltration, thereby ensuring the integrity and sealing of the shoe material mold cavity.

[0067] Figure 2 and Figure 5 It is shown that an annular collecting groove 304 is provided on the peripheral side of the bottom wall of the mold cavity of the lower mold base 3, and an inlet and outlet hole 305 is provided on the inner bottom wall of the collecting groove 304. Through the setting of the collecting groove 304, the release agent in the shoe material mold cavity can be concentrated in the collecting groove 304, and finally flow back to the cavity of the containing box 301 and the lower mold base 3 through the inlet and outlet hole 305 on the collecting groove 304, so as to avoid excessive release agent staying at the bottom of the shoe material mold cavity to cause uneven coating or waste of release agent.

[0068] Figure 2-Figure 3 It is shown that an annular cooling cavity 201 is provided in the upper die holder 2, and a top wall of the die cavity of the upper die holder 2 is provided with a feed port 202 communicating with the cooling cavity 201;

[0069] A blocking structure for blocking the inlet 202 is provided in the inlet 202 . The blocking structure is used to control the release agent to move from the mold cavity of the upper mold base 2 to the cooling cavity 201 . The blocking structure is also used to automatically close the inlet 202 after the cooling cavity 201 is filled with the release agent.

[0070] Through the setting of the cooling cavity 201, the agent inlet 202 and the sealing structure, when the shoe material mold cavity is filled with the release agent, when the liquid push plate 901 continues to rise to extrude the release agent, more release agent enters the cooling cavity 201 from the agent inlet 202, so that the cooling cavity 201 is filled with the release agent. Due to the setting of the sealing structure, it is ensured that the release agent can stay in the cooling cavity 201, so that the release agent can stay in the upper mold base 2 to cool the upper mold base 2, and it is ensured that the upper mold base 2 and the lower mold base 3 can be cooled at the same time, thereby further enhancing the cooling effect on the shoe material after molding, accelerating the demoulding process, and facilitating further increasing production efficiency.

[0071] Figure 2-Figure 3 The blocking structure shown includes:

[0072] An expansion groove 203, which is formed on the inner bottom wall of the cooling chamber 201 and communicates with the feed port 202, and the inner diameter of the expansion groove 203 is larger than the inner diameter of the feed port 202;

[0073] The first blocking block 204 is a T-shaped block with a larger top and a smaller bottom. The upper end of the first blocking block 204 is consistent with the shape and size of the expansion groove 203 and is movably connected to the expansion groove 203. The lower end of the first blocking block 204 is consistent with the shape and size of the feed port 202 and is movably connected to the feed port 202.

[0074] The first spring 205 has upper and lower ends fixed to the top wall of the cooling cavity 201 and the upper end of the first blocking block 204 respectively.

[0075] When the shoe material mold cavity is full of the release agent, the liquid push plate 901 continues to rise to extrude the release agent, and the release agent squeezes the first blocking block 204, so that the first blocking block 204 squeezes the first spring 205 and rises, thereby opening the inlet 202, and the release agent enters the cooling cavity 201 from the shoe material mold cavity. When the cooling cavity 201 is full of the release agent, the pressure areas in the shoe material mold cavity and the cooling cavity 201 are balanced. At this time, the first blocking block 204 descends and blocks the inlet 202 under the elastic force of the first spring 205, and the release agent entering the cooling cavity 201 is retained in the cooling cavity 201, thereby achieving the purpose of cooling the upper mold base 2 with the release agent.

[0076] Figure 1 , Figure 2 and Figure 4 The demoulding assembly 6 is shown to include a fixed ejector rod 601, a movable ejector rod 602 and a third spring 603. The fixed ejector rod 601 is fixed on the mounting base 1. The upper end of the movable ejector rod 602 movably penetrates the bottom wall of the receiving box 301 and extends into the cavity of the lower mold base 3. The upper and lower ends of the movable ejector rod 602 are both fixed with a top sheet 6021. The third spring 603 is movably sleeved on the lower part of the movable ejector rod 602. The upper and lower ends of the third spring 603 are respectively fixed to the bottom surface of the receiving box 301 and the upper surface of the top sheet 6021 at the lower end.

[0077] The bottom surface of the mold cavity of the lower mold base 3 is provided with a demoulding hole 302 which is connected with the cavity of the lower mold base 3. The demoulding hole 302 is consistent in shape and size with the top sheet 6021 and is movably connected with the top sheet 6021.

[0078] A first limit stop ring 303 is fixed to the top wall of the cavity of the lower die seat 3. The first limit stop ring 303 is movably sleeved on the movable ejector rod 602. The inner diameter of the first limit stop ring 303 is the same as the diameter of the movable ejector rod 602. The outer diameter of the first limit stop ring 303 is greater than the diameter of the ejector plate 6021.

[0079] When the lower mold base 3 descends, the lower end of the movable ejector 602 contacts the upper end of the fixed ejector 601, so that the movable ejector 602 rises, so that the top plate 6021 at the upper end of the movable ejector 602 ejects the shoe material in the lower mold base 3, completing demoulding.

[0080] Figure 2 and Figure 7 The connecting assembly 7 is shown to include a mounting block 701, a support rod 702 and a connecting plate 703. The mounting block 701 is fixedly sleeved on the second hydraulic cylinder 8. The support rod 702 is fixed on the mounting block 701 and the upper end thereof is fixed to the bottom surface of the receiving box 301.

[0081] The lower end of the support rod 702 extends downward and is fixed to the upper surface of the connecting plate 703, and the bottom surface of the connecting plate 703 is fixed to the upper end of the piston rod of the first hydraulic cylinder 5;

[0082] A support guide rod 101 is fixed to the upper end of the mounting base 1 , and the upper end of the support guide rod 101 slides through the lower die base 3 and is fixed to the upper die base 2 .

[0083] When the piston rod of the first hydraulic cylinder 5 is extended, it drives the mounting block 701, the support rod 702 and the connecting plate 703 to rise synchronously, so that the second hydraulic cylinder 8 and the lower die base 3 slide upward along the support guide rod 101 to complete the mold closing of the lower die base 3 and the upper die base 2, or the first hydraulic cylinder 5 is used to drive the mounting block 701, the support rod 702 and the connecting plate 703 to descend synchronously, so that the second hydraulic cylinder 8 and the lower die base 3 slide downward along the support guide rod 101 to complete the mold opening of the lower die base 3 and the upper die base 2.

[0084] The present invention also provides an injection molding production method for a rubber-modified foamed shoe material. The production method is applied to the injection molding equipment for the rubber-modified foamed shoe material, and comprises the following steps:

[0085] S1, first use the first hydraulic cylinder 5 to control the lower die base 3 to rise and close the mold with the upper die base 2, so that the mold cavity of the upper die base 2 and the lower die base 3 form a shoe material mold cavity;

[0086] S2, then the release agent in the cavity of the containing box 301 and the lower mold base 3 is squeezed into the shoe material mold cavity from the inlet and outlet holes 305 through the adding adjustment mechanism 9. When the shoe material mold cavity is filled with the release agent, the adding adjustment mechanism 9 is reset, so that the release agent in the shoe material mold cavity flows back to the cavity of the lower mold base 3 and the containing box 301 through the inlet and outlet holes 305 again, completing the uniform coating of the release agent;

[0087] S3, using a mixed injection molding structure to mix the modified foam rubber raw material, and injecting the mixed modified foam rubber into the shoe material mold cavity through the injection molding pipe 4;

[0088] S4, after the modified foam rubber is cooled, it fills the shoe material mold cavity and forms the shoe material. At this time, the first hydraulic cylinder 5 is used to drive the lower mold base 3 to descend and open the mold with the upper mold base 2. When the lower mold base 3 descends after the mold opening, the demoulding assembly 6 ejects the shoe material in the lower mold base 3 to complete the demoulding operation and complete the injection molding of the shoe material.

[0089] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. An injection molding device for a rubber modified foamed shoe material, comprising a mounting seat (1), an injection molding mold mounted on the mounting seat (1), and a mixed injection molding structure with an injection molding tube (4) fixed at the lower end, the mixed injection molding structure being used to uniformly mix a modified foamed rubber raw material for making the shoe material and inject the raw material into an injection molding mold on the mounting seat (1) through the injection molding tube (4), the injection molding mold comprising an upper mold seat (2) fixed to the mounting seat (1) and a lower mold seat (2) arranged at an adjustable distance from the upper mold seat (2) The mounting base (3) is provided with a mold cavity on one side of the upper mold base (2) and the lower mold base (3) close to each other, the injection tube (4) is fixed to the middle of the upper mold base (2) and the injection port at the lower end of the injection tube (4) is connected to the mold cavity of the upper mold base (2), the mounting base (1) is also provided with a first hydraulic cylinder (5) for driving the lower mold base (3) to rise and fall to close or open the mold with the upper mold base (2), and the mounting base (1) and the lower mold base (3) are jointly provided with a demoulding component (6) for assisting demoulding, characterized in that: The lower end of the lower mold base (3) is fixedly connected to a containing box (301) which is in communication with the inner cavity of the lower mold base (3); the cavities of the containing box (301) and the lower mold base (3) are both filled with a mold release agent; and the lower mold base (3) is provided with an inlet and outlet hole (305) for the mold release agent to enter the mold cavity; The lower mold base (3) is provided with an adding and adjusting mechanism (9) for squeezing the mold release agent from the inlet and outlet holes (305) into the mold cavities of the upper mold base (2) and the lower mold base (3); the adding and adjusting mechanism (9) comprises a liquid pushing plate (901) and an adjusting rod (902); a blocking piece (9023) for blocking the inlet and outlet holes (305) is formed at the upper end of the adjusting rod (902); when the adding and adjusting mechanism (9) is reset, the mold release agent in the mold cavities of the upper mold base (2) and the lower mold base (3) flows back into the cavities of the containing box (301) and the lower mold base (3) through the inlet and outlet holes (305); A second hydraulic cylinder (8) for driving the adding adjustment mechanism (9) to move is installed at the lower end of the containing box (301), and the second hydraulic cylinder (8) is fixed to the bottom surface of the containing box (301) and the end of the piston rod of the first hydraulic cylinder (5) via a connecting assembly (7).

2. The injection molding equipment for rubber modified foamed shoe material according to claim 1, characterized in that: The liquid pushing plate (901) is slidably connected to the inner wall of the containing box (301); the upper end of the piston rod of the second hydraulic cylinder (8) movably penetrates the bottom wall of the containing box (301) and is fixed to the bottom surface of the liquid pushing plate (901); The adjusting rod (902) is a telescopic rod with adjustable length, and the lower end of the adjusting rod (902) is fixed on the liquid pushing plate (901).

3. The injection molding equipment for rubber modified foamed shoe material according to claim 1, characterized in that: The regulating rod (902) comprises a fixed rod (9021) and a movable sleeve rod (9022), the lower end of the fixed rod (9021) is fixed to the upper end of the liquid pushing plate (901), the movable sleeve rod (9022) is movably sleeved on the upper part of the fixed rod (9021), and the blocking piece (9023) and the upper end of the movable sleeve rod (9022) are integrally formed; A fourth spring (903) is installed in the movable sleeve rod (9022), and the upper and lower ends of the fourth spring (903) are respectively fixed to the inner top wall of the movable sleeve rod (9022) and the upper end surface of the fixed rod (9021).

4. The injection molding equipment for rubber modified foamed shoe material according to claim 1, characterized in that: A second limit stop ring (306) is fixed to the top wall of the cavity of the lower mold base (3); the second limit stop ring (306) is movably sleeved on the outside of the movable sleeve rod (9022); the inner diameter of the second limit stop ring (306) is the same as the outer diameter of the movable sleeve rod (9022); and the outer diameter of the second limit stop ring (306) is greater than the outer diameter of the blocking piece (9023).

5. The injection molding equipment for rubber modified foamed shoe material according to claim 1, characterized in that: An annular collecting groove (304) is provided on the peripheral side of the bottom wall of the mold cavity of the lower mold base (3), and the inlet and outlet holes (305) are provided on the inner bottom wall of the collecting groove (304).

6. The injection molding equipment for rubber modified foamed shoe material according to claim 1, characterized in that: An annular cooling cavity (201) is provided in the upper die seat (2), and a top wall of the die cavity of the upper die seat (2) is provided with a feed port (202) communicating with the cooling cavity (201); A sealing structure for sealing the inlet (202) is arranged in the inlet (202), and the sealing structure is used to control the movement of the demoulding agent from the mold cavity of the upper mold base (2) to the cooling cavity (201). The sealing structure is also used to automatically close the inlet (202) after the cooling cavity (201) is filled with the demoulding agent.

7. The injection molding equipment for rubber modified foamed shoe material according to claim 6, characterized in that: The blocking structure comprises: An expansion groove (203), the expansion groove (203) is provided on the inner bottom wall of the cooling cavity (201) and is connected to the feed port (202), and the inner diameter of the expansion groove (203) is greater than the inner diameter of the feed port (202); a first blocking block (204), the first blocking block (204) being a T-shaped block with a larger upper portion and a smaller lower portion, the upper end of the first blocking block (204) being consistent in shape and size with the expansion groove (203) and being movably plugged into the expansion groove (203), and the lower end of the first blocking block (204) being consistent in shape and size with the feed port (202) and being movably plugged into the feed port (202); A first spring (205), wherein the upper and lower ends of the first spring (205) are respectively fixed to the inner top wall of the cooling cavity (201) and the upper end of the first blocking block (204).

8. The injection molding equipment for rubber modified foamed shoe material according to claim 1, characterized in that: The demoulding assembly (6) comprises a fixed ejector rod (601), a movable ejector rod (602) and a third spring (603); the fixed ejector rod (601) is fixed on the mounting seat (1); the upper end of the movable ejector rod (602) movably penetrates the bottom wall of the accommodating box (301) and extends into the cavity of the lower mold seat (3); the upper and lower ends of the movable ejector rod (602) are both fixed with ejector plates (6021); the third spring (603) is movably sleeved on the lower part of the movable ejector rod (602); the upper and lower ends of the third spring (603) are respectively fixed to the bottom surface of the accommodating box (301) and the upper surface of the ejector plate (6021) at the lower end; The bottom surface of the mold cavity of the lower mold base (3) is provided with a demoulding hole (302) which is connected to the cavity of the lower mold base (3); the demoulding hole (302) is consistent in shape and size with the top sheet (6021) and is movably connected to the top sheet (6021); A first limit stop ring (303) is fixed to the top wall of the cavity of the lower die base (3); the first limit stop ring (303) is movably sleeved on the movable ejector rod (602); the inner diameter of the first limit stop ring (303) is the same as the diameter of the movable ejector rod (602); and the outer diameter of the first limit stop ring (303) is greater than the diameter of the ejector plate (6021).

9. The injection molding equipment for rubber modified foamed shoe material according to claim 1, characterized in that: The connecting assembly (7) comprises a mounting block (701), a support rod (702) and a connecting plate (703); the mounting block (701) is fixedly sleeved on the second hydraulic cylinder (8); the support rod (702) is fixed on the mounting block (701) and the upper end of the support rod is fixed to the bottom surface of the containing box (301); The lower end of the support rod (702) extends downward and is fixed to the upper surface of the connecting plate (703), and the bottom surface of the connecting plate (703) is fixed to the upper end of the piston rod of the first hydraulic cylinder (5); A support guide rod (101) is fixed to the upper end of the mounting seat (1), and the upper end of the support guide rod (101) slides through the lower die seat (3) and is fixed to the upper die seat (2).

10. A method for producing a rubber-modified foamed shoe material by injection molding, applied to an injection molding device for producing a rubber-modified foamed shoe material as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1. First, use a first hydraulic cylinder (5) to control the lower mold base (3) to rise and close the mold with the upper mold base (2), so that the mold cavity of the upper mold base (2) and the lower mold base (3) form a shoe material mold cavity; S2, the mold release agent in the cavity of the containing box (301) and the lower mold base (3) is squeezed into the shoe material mold cavity from the agent inlet and outlet holes (305) through the adding adjustment mechanism (9); when the shoe material mold cavity is filled with the mold release agent, the adding adjustment mechanism (9) is reset, so that the mold release agent in the shoe material mold cavity flows back to the cavity of the lower mold base (3) and the containing box (301) through the agent inlet and outlet holes (305), thereby completing the uniform coating of the mold release agent; S3, using a mixed injection molding structure to mix the modified foam rubber raw material, and injecting the mixed modified foam rubber into the shoe material mold cavity through an injection molding tube (4); S4, after the modified foamed rubber is cooled, it fills the shoe material mold cavity and forms the shoe material. At this time, the first hydraulic cylinder (5) is used to drive the lower mold base (3) to descend and open the mold with the upper mold base (2). When the lower mold base (3) descends after the mold opening, the demoulding component (6) ejects the shoe material in the lower mold base (3), completing the demoulding operation and completing the injection molding of the shoe material.

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