Rubber molding equipment and method of using the same

Abstract

The present invention relates to the technical field of rubber product processing and rubber recycling and reprocessing, and proposes a rubber molding device and a method for using the same, comprising a machine body, an injection tube, a hopper, and a molding die, wherein the injection tube comprises an outer tube, a rotating shaft, a partition, a spiral blade, and a heating sleeve, wherein the outer tube is fixedly mounted on the machine body; the rotating shaft is rotatably and slidably mounted inside the outer tube; the partition is fixedly mounted on the rotating shaft and is sealed against the inner wall of the outer tube, and a liquid hole is provided inside the partition; the spiral blade is fixedly mounted on the rotating shaft and is in contact with the inner wall of the outer tube; and the heating sleeve is fixedly mounted on the outer side of the outer tube. By arranging a partition and arranging a liquid hole in the partition, the present invention can not only block the rubber particles that are not completely melted in the rubber liquid flow, allowing them to be fully heated and melted, but also filter out impurities in the rubber liquid flow and separate bubbles in the rubber liquid flow, thereby ensuring the molding quality of the rubber.

Description

Technical Field

[0001] The present invention relates to the technical field of rubber product processing and rubber recycling and reprocessing, and in particular to a rubber molding device and a use method thereof. Background Art

[0002] With the rapid development of modern industry, rubber products are increasingly used in various fields, from various rubber products in daily life to industrial equipment accessories. The demand for rubber products continues to grow. However, the production, use and disposal of rubber products generate a large amount of waste rubber. If this waste rubber is not properly handled, it will not only cause a huge waste of resources but also cause serious pollution to the environment.

[0003] When recycling thermoplastic rubber, the recycled rubber products can be cleaned and crushed, then directly heated to melt, and then made into new rubber products such as automotive parts, toys, seals, etc. through molding processes such as injection molding, extrusion, and blow molding. The recycled thermoplastic rubber can also be blended with a certain proportion of new thermoplastic rubber or other polymers to improve its performance and then subjected to molding processing.

[0004] Injection molding is the most common method in thermoplastic rubber recycling, and this method relies on injection molding equipment to realize. As disclosed in the patent of invention of announcement number CN118124086B, a kind of injection molding machine spraying device, it is provided with injection molding table and injection mold on machine body, and a storage box and injection molding barrel are provided on one side of injection molding table, and the rubber recovered is added in the injection mold by storage box and injection molding barrel, thereby realizes the reuse of waste rubber. However, waste rubber will have the problem of insufficient melting when melting, and also there will be bubbles or impurities in the molten rubber liquid flow, which can affect the molding quality of rubber. Summary of the Invention

[0005] In view of this, the present invention provides a rubber molding device and a method of using the same, which can isolate rubber particles or impurities that are not completely melted in the rubber liquid flow, thereby ensuring the molding quality of the rubber.

[0006] The technical solution of the present invention is implemented as follows: On the one hand, the present invention provides a rubber molding equipment, including a machine body, an injection tube, a hopper and a molding mold, wherein the injection tube includes an outer tube, a rotating shaft, a partition, a spiral blade and a heating sleeve, and the outer tube is fixedly arranged on the machine body; the rotating shaft is rotatably and slidably arranged in the outer tube; the partition is fixedly arranged on the rotating shaft and sealed against the inner wall of the outer tube, and a liquid hole is opened in the partition; the spiral blade is fixedly arranged on the rotating shaft and against the inner wall of the outer tube; the heating sleeve is fixedly arranged on the outside of the outer tube; the hopper and the molding mold are both fixedly arranged on the machine body, and the two are connected through the outer tube.

[0007] On the basis of the above technical solution, preferably, the rotating shaft includes a sealing shaft, a feeding shaft and a stirring shaft, wherein the sealing shaft is sealed and arranged in the outer tube at one end away from the forming mold, and is rotatably and slidingly connected to the outer tube; the feeding shaft is arranged in the outer tube at one end close to the forming mold, and its outer diameter is smaller than the inner diameter of the outer tube, and the feeding shaft and the sealing shaft are both coaxially arranged with the outer tube; the stirring shaft is fixedly arranged between the sealing shaft and the feeding shaft, and the stirring shaft is not coaxially arranged with the outer tube; a feed port is opened on the circumferential side of the outer tube, the hopper is connected to the feed port, and the feed port is located at the end of the stirring shaft away from the feeding shaft.

[0008] More preferably, there are multiple stirring shafts, and the distances between the axes of the multiple stirring shafts and the axis of the outer tube are different; the ends of the multiple stirring shafts close to the sealing shaft are flush with each other, and the lengths of the multiple stirring shafts are different.

[0009] More preferably, the distance from the axis of the stirring shaft to the axis of the outer tube is inversely proportional to the outer diameter of the stirring shaft.

[0010] On the basis of the above technical solution, preferably, the injection tube further includes a distribution cylinder and a plug, wherein the distribution cylinder is fixedly arranged on the side of the partition away from the forming die, its outer diameter is smaller than the inner diameter of the outer tube, and filter holes are opened on its circumferential side; the plug is sealed and fixed at one end of the distribution cylinder away from the partition, and the outer diameter of the plug gradually increases from the end away from the forming die to the end close to the forming die.

[0011] More preferably, the distribution cylinder includes a plurality of arc plates and a plurality of connecting plates, wherein the plurality of arc plates are arranged in a circular array around the axis of the outer tube, and the distance between the circumferential side of the arc plate and the inner wall of the outer tube gradually decreases along the circumference of the rotating shaft; the connecting plates and the plurality of arc plates are alternately arranged, and the two are fixedly connected to enclose a cylindrical structure.

[0012] Further preferably, the material distributing cylinder also includes a plurality of material rods, which are fixedly arranged on the arc plate and correspond one to one thereto, and the distance between the material rods and the inner wall of the outer tube is smaller than the distance between the arc plate and the inner wall of the outer tube; a plurality of grooves are evenly distributed along the axial direction on the circumferential side of the material rod, the inner wall of the groove is flush with the circumferential side of the arc plate, and the distance between two adjacent grooves is smaller than half of the pitch of the spiral blade.

[0013] More preferably, the injection tube further includes a plurality of vibration balls, which are arranged in the distributing cylinder; the end of the connecting plate close to the axis of the outer tube is arc-shaped and extends out of the inner side of the arc plate.

[0014] More preferably, the outer diameter of the feeding shaft at one end close to the forming die is larger than the outer diameter of the feeding shaft at one end away from the forming die, and the method of use thereof.

[0015] In a second aspect, the present invention provides a method for using rubber molding equipment, comprising the following steps: S1, heating the heating sleeve and adding the recovered rubber raw material into the hopper; S2, first using a reducer to drive the rotating shaft to rotate in the forward direction, and then driving the rotating shaft to slide in the direction close to the forming mold, melting the rubber raw material and conveying it into the forming mold; S3, maintaining pressure and cooling the rubber raw material in the forming mold; S4, using a reducer to drive the rotating shaft to rotate in the reverse direction, and simultaneously driving the rotating shaft to slide in the direction away from the forming mold, moving the unmelted rubber raw material on the outside of the distributing cylinder and the vibrating ball in the distributing cylinder to the end of the distributing cylinder away from the forming mold; S5, opening the forming mold and taking out the rubber product.

[0016] The rubber molding equipment and the method of using the same of the present invention have the following beneficial effects compared with the prior art:

[0017] (1) By setting up a partition and providing a liquid hole in the partition, not only can the rubber particles that are not completely melted in the rubber liquid flow be blocked, allowing them to be fully heated and melted, but also the impurities in the rubber liquid flow can be filtered and the bubbles in the rubber liquid flow can be separated, thereby ensuring the molding quality of the rubber.

[0018] (2) By setting up a feeding cylinder, the rubber particles that are not completely melted in the rubber liquid flow can be brought closer to the heating sleeve. By setting up the feeding cylinder to include an arc plate, a connecting plate and a material rod, and opening a slot on the material rod, not only can the rubber particles be squeezed, but also the accumulation problem of rubber particles can be avoided, and the melting speed of rubber particles can be accelerated. By setting a vibrating ball in the feeding cylinder, the rubber particles can be shaken away from the feeding cylinder, avoiding the clogging of the filter holes and the liquid holes.

[0019] (3) By configuring the rotating shaft to include a sealing shaft, a feeding shaft, and a stirring shaft, configuring multiple stirring shafts, and limiting the outer diameter of the stirring shaft, the rotating shaft can be used to stir the rubber liquid flow, thereby further accelerating the melting efficiency of the rubber particles and improving the mixing uniformity of the various rubber raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a three-dimensional diagram of a rubber molding device of the present invention.

[0022] Figure 2 The figure is a cross-sectional view of an injection tube in a rubber molding device of the present invention.

[0023] Figure 3 The present invention is a cross-sectional view of a partition in a rubber molding device.

[0024] Figure 4 This is a cross-sectional view of a distributing drum in a rubber molding device of the present invention.

[0025] Figure 5 This is a three-dimensional diagram of the stirring shaft and feeding shaft in a rubber molding device of the present invention.

[0026] Figure 6 The present invention is a three-dimensional diagram of the stirring shaft and the sealing shaft in a rubber molding device.

[0027] Figure 7 The present invention is a cross-sectional view of a stirring shaft in a rubber molding device.

[0028] Figure 8 This is a cross-sectional view of a distributing drum in a rubber molding device of the present invention.

[0029] Figure 9 The present invention is a cross-sectional view of a connecting plate in a rubber molding device.

[0030] Figure 10 This is a three-dimensional diagram of a card slot in a rubber molding device of the present invention.

[0031] Figure 11 This is a three-dimensional diagram of a material rod in a rubber molding device of the present invention.

[0032] Figure 12 This is a three-dimensional diagram of a partition in a rubber molding device of the present invention.

[0033] Figure 13 This is a three-dimensional diagram of the feeding shaft in a rubber molding device of the present invention.

[0034] Among them: 1. Machine body; 2. Injection tube; 21. Outer tube; 22. Rotating shaft; 221. Sealing shaft; 222. Feeding shaft; 223. Stirring shaft; 23. Partition; 24. Spiral blade; 25. Heating jacket; 26. Distributing cylinder; 261. Arc plate; 262. Connecting plate; 263. Feed rod; 27. Plug; 28. Vibrating ball; 201. Liquid hole; 202. Feed port; 203. Filter hole; 204. Slot; 3. Hopper; 4. Forming mold. DETAILED DESCRIPTION

[0035] The following will be combined with the specific embodiments of the present invention to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] The rubber molding equipment of the present invention is an injection molding equipment for plastic materials such as plastic and rubber, comprising a body 1, an injection tube 2, a hopper 3 and a molding die 4, and is used for injection processing of rubber raw materials and also for recycling and reprocessing rubber.

[0037] The injection tube 2, hopper 3 and forming mold 4 are all fixedly arranged on the machine body 1. The hopper 3 and the forming mold 4 are connected through the injection tube 2. The rubber raw materials are crushed and added into the hopper 3, and then transported to the forming mold 4 by the injection tube 2 for injection molding to realize the processing of rubber products.

[0038] The injection tube 2 includes an outer tube 21, a rotating shaft 22, a partition 23, a spiral blade 24, a heating sleeve 25, a feeding cylinder 26, a plug 27 and a vibrating ball 28. The outer tube 21 is fixedly set on the body 1, and the hopper 3 and the forming mold 4 are connected through the outer tube 21. The rotating shaft 22 rotates and is slidably set in the outer tube 21. The spiral blade 24 is fixedly set on the rotating shaft 22 and is in contact with the inner wall of the outer tube 21. The heating sleeve 25 is fixedly set on the outside of the outer tube 21. The heating sleeve 25 is a prior art, such as a sleeve with an electric heating rod embedded inside, which can heat and melt the rubber material in the outer tube 21; when the reducer is used to drive the rotating shaft 22 to rotate, the spiral blade 24 is driven to rotate, thereby pushing the material in the outer tube 21, so that the rubber material is heated and melted into a rubber liquid flow while being transported to the forming mold 4 for injection molding.

[0039] During the transportation of the rubber material, there will be a problem of incomplete melting of the rubber raw material. When the rubber material is a recycled material, there will be impurities in the rubber material. During the melting process of the rubber material, there will be bubbles in the rubber liquid flow. Once the incompletely melted rubber particles, impurities and bubbles enter the molding mold 4, it will not only affect the molding quality of the rubber, but also cause damage to the injection molding equipment, and reduce the molding efficiency of the rubber products.

[0040] The partition 23 is fixedly mounted on the rotating shaft 22 and is sealed against the inner wall of the outer tube 21. A liquid hole 201 is provided in the partition 23. Figure 3 As shown, when the rotating shaft 22 rotates, the rubber liquid flow is driven by the spiral blade 24 to pass through the liquid hole 201, and the molten rubber particles are isolated on the side of the partition 23 away from the forming mold 4 until they are completely melted; at the same time, the impurities that cannot be melted are isolated on the side of the partition 23 away from the forming mold 4 and cannot enter the forming mold 4. After passing through the liquid hole 201, the bubbles will be divided into small bubbles and float to the liquid surface of the rubber liquid flow, so as to avoid being in the rubber liquid flow and affecting the molding quality of the rubber product.

[0041] To improve the bubble-splitting performance of liquid hole 201, liquid hole 201 is preferably configured in an elongated shape, such as an 8-shaped or X-shaped structure. To prevent unmelted rubber particles or impurities from clogging partition 23, partition 23 is preferably configured in a conical cylindrical structure. The outer diameter of partition 23 gradually increases from the end away from forming die 4 to the end closer to forming die 4. During the flow of rubber liquid, unmelted rubber particles can be pressed against the inner wall of outer tube 21, making them more easily melted by heating jacket 25.

[0042] The distributing cylinder 26 is fixedly arranged on the side of the partition 23 away from the forming die 4. The outer diameter of the distributing cylinder 26 is smaller than the inner diameter of the outer tube 21. The circumference of the distributing cylinder 26 is spaced from the inner wall of the outer tube 21, and a plurality of filter holes 203 are opened on the circumference of the distributing cylinder 26. The plug 27 is sealed and fixed to the end of the distributing cylinder 26 away from the partition 23, and the outer diameter of the plug 27 gradually increases from the end away from the forming die 4 to the end close to the forming die 4. Figure 4 As shown, when the spiral blade 24 drives the rubber liquid flow to flow from right to left, the rubber liquid flow can pass through the filter hole 203 and the liquid hole 201, and thus be injected into the molding mold 4, and the unmelted rubber particles in the rubber liquid flow are guided to the outside of the distribution cylinder 26 by the plug 27 until they are completely melted; the setting of the distribution cylinder 26 and the plug 27 makes the rubber particles closer to the heating sleeve 25, thereby accelerating the melting efficiency of the rubber particles and improving the processing efficiency of rubber products.

[0043] In order to ensure the flow efficiency of the rubber liquid flow, it is preferred to set both the filter hole 203 and the liquid hole 201 to be multiple; it is preferred to have multiple liquid holes 201 located in the distributing tube 26, thereby enhancing the filtering effect of the filter hole 203 and the liquid hole 201 on the rubber liquid flow.

[0044] like Figure 8 and Figure 9 As shown, the material distributing cylinder 26 includes a plurality of arc plates 261, a plurality of connecting plates 262 and a plurality of material rods 263. The plurality of arc plates 261 are arranged in a circular array around the axis of the outer tube 21, and the distance between the circumferential side of the arc plates 261 and the inner wall of the outer tube 21 gradually decreases along the circumferential direction of the rotating shaft 22. The connecting plates 262 and the plurality of arc plates 261 are alternately arranged and fixedly connected. The plurality of arc plates 261 correspond to the plurality of connecting plates 262 one by one and enclose a cylindrical structure. Figure 8 As shown, when the rubber material is conveyed, the rotating shaft 22 rotates clockwise, and the distance between the circumference of the arc plate 261 and the inner wall of the outer tube 21 gradually increases in the clockwise direction. That is, when the rotating shaft 22 rotates, it can not only isolate the unmelted rubber particles on the outside of the arc plate 261, but also gradually squeeze the unmelted rubber particles to accelerate the melting efficiency of the rubber particles.

[0045] The material rod 263 is fixedly arranged on the outside of the arc plate 261, and the material rod 263 and the arc plate 261 also correspond to each other one by one. The distance between the material rod 263 and the inner wall of the outer tube 21 is smaller than the distance between the arc plate 261 and the inner wall of the outer tube 21. The cross-section of the material rod 263 is circular, which can not only better extrude the unmelted rubber particles, but also extrude the unmelted rubber particles into a roll shape, so as to increase the contact area between the unmelted rubber material and the rubber liquid flow, thereby accelerating its melting efficiency.

[0046] The material rod 263 is arranged on the outside of the arc plate 261 and is a protruding structure. When the rotating shaft 22 drives the feeding cylinder 26 to rotate, the material rod 263 can drive some unmelted rubber particles to rotate in the outer tube 21, thereby dispersing the unmelted rubber particles and further accelerating the melting efficiency of the rubber particles.

[0047] like Figure 9 and Figure 10 As shown, it is preferred to open a slot 204 on the peripheral side of the material rod 263, and the inner wall of the slot 204 is flush with the peripheral side of the arc plate 261, as shown in FIG. Figure 8 As shown, when the rotating shaft 22 rotates clockwise, the unmelted rubber particles can be stuck in the card slot 204, and thus rotate along with the distributing cylinder 26, so as to improve the dispersing effect of the distributing cylinder 26 on the rubber particles and accelerate the melting efficiency of the rubber particles.

[0048] Each rod 263 is provided with a plurality of slots 204 evenly distributed along its axial direction, and the distance between two adjacent slots 204 is less than half of the pitch of the spiral blade 24. Figure 10As shown, a plurality of slots 204 are provided between two adjacent spiral blades 24, and a plurality of rubber particles are clamped in each slot 204. The clamping of the slots 204 can prevent the rubber particles from moving along the axial direction of the material rod 263 with the rubber liquid flow, thereby improving the dispersion effect of the distributing cylinder 26 on the rubber particles.

[0049] like Figure 9 and Figure 11 As shown, the slot 204 is only provided on one side of the material rod 263. Figure 8 As shown, when the shaft 22 rotates counterclockwise, the unmelted rubber particles on the material rod 263 are affected by the rubber liquid flow and slide in the direction away from the molding die 4, so that they can be redispersed and melted when the shaft 22 rotates clockwise, thereby further improving the dispersion and melting effects of the rubber particles.

[0050] like Figure 9 As shown, the end of the connecting plate 262 close to the axis of the outer tube 21 is arc-shaped and extends out of the inner side of the arc plate 261. The vibrating ball 28 is arranged in the distributing cylinder 26; Figure 8 As shown, when the rotating shaft 22 rotates clockwise, the connecting plate 262 can lift the vibrating ball 28, and after the vibrating ball 28 is lifted to a certain position, it drops down. The dropped vibrating ball 28 hammers the arc plate 261, causing the arc plate 261 to vibrate, thereby preventing rubber particles from adhering to the surface of the arc plate 261, thereby preventing the filter hole 203 from being blocked and ensuring the smooth flow of the rubber liquid.

[0051] In order to enhance the vibration effect of the vibration ball 28 on the distribution tube 26 , it is preferred to provide a plurality of vibration balls 28 .

[0052] The rotating shaft 22 includes a sealing shaft 221, a feeding shaft 222 and a stirring shaft 223. Figure 2 、 Figure 5 and Figure 6 As shown, a feed port 202 is provided on the peripheral side of the outer tube 21, and the hopper 3 is connected to the feed port 202. The sealing shaft 221 is sealed and arranged in the outer tube 21 at the end away from the forming mold 4. The sealing shaft 221 is rotatably and slidably connected to the outer tube 21. The feeding shaft 222 is arranged in the outer tube 21 at the end close to the forming mold 4. The outer diameter of the feeding shaft 222 is smaller than the inner diameter of the outer tube 21, and the feeding shaft 222 and the sealing shaft 221 are both coaxially arranged with the outer tube 21. The stirring shaft 223 is fixed. It is arranged between the sealing shaft 221 and the feeding shaft 222, and the feed port 202 is located at the end of the stirring shaft 223 away from the feeding shaft 222, and the stirring shaft 223 is not coaxial with the outer tube 21; when the reducer drives the sealing shaft 221 to rotate, the stirring shaft 223 rotates around the axis of the outer tube 21 instead of rotating around its own axis, so that the material in the outer tube 21 can be stirred, which not only avoids the accumulation of unmelted rubber particles, but also improves the mixing uniformity of multiple materials.

[0053] In order to improve the stirring effect of the stirring shaft 223, it is preferred to provide a plurality of stirring shafts 223. Figure 5 and Figure 6 As shown, multiple stirring shafts 223 are aligned with each other near one end of the sealing shaft 221, and the lengths of the multiple stirring shafts 223 are different, that is, the positions of the multiple stirring shafts 223 near one end of the feeding shaft 222 are different, which can make the rubber liquid flow form an unstable flow direction, so as to fully stir the rubber liquid flow and disperse the unmelted rubber particles to the outside of the distribution cylinder 26 as soon as possible.

[0054] like Figure 7 As shown, the distances between the axes of the plurality of stirring shafts 223 and the axis of the outer tube 21 are different, and the distances between the axes of the stirring shafts 223 and the axis of the outer tube 21 are inversely proportional to the outer diameter of the stirring shafts 223, that is, the closer the stirring shafts 223 are to the axis of the outer tube 21, the thicker the outer diameter is, and the farther the stirring shafts 223 are from the axis of the outer tube 21, the thinner the outer diameter is; Figure 7 Taking the rubber liquid flow in the middle dotted circle area as an example, when the rotating shaft 22 rotates counterclockwise, the stirring shaft 223 located at the lower right corner first stirs the rubber liquid flow at the edge of the area, then the stirring shaft 223 located at the lower left position disturbs the rubber liquid flow in the middle of the area, and finally the stirring shaft 223 located in the middle position stirs the rubber liquid flow at the other edge of the area, and so on and so forth to achieve repeated stirring of the rubber liquid flow in the area; correspondingly, the overall stirring effect of the rubber liquid flow can be improved by increasing the number of stirring shafts 223.

[0055] like Figure 13 As shown, the outer diameter of the feeding shaft 222 at one end close to the forming mold 4 is larger than the outer diameter at the end away from the forming mold 4, so that the rubber liquid can flow stably into the forming mold 4 to ensure the molding quality of the rubber product.

[0056] A method for using a rubber molding device of the present invention is as follows:

[0057] S1, heat the heating jacket 25 and raise the temperature of the outer tube 21 to 160-220°C so that the rubber raw material in the outer tube 21 can be melted; the recycled rubber raw material or the new material configured according to production needs is crushed, cleaned and dried and then added to the hopper 3 for storage.

[0058] S2, first use the reducer to drive the rotating shaft 22 to rotate in the forward direction, allowing the rotating shaft 22 to drive the spiral blade 24 to rotate, so that the material in the hopper 3 enters and fills the outer tube 21, and then drive the rotating shaft 22 to slide in the direction close to the forming mold 4, and inject the rubber liquid flow into the forming mold 4 at a certain pressure and speed; in this process, the rubber raw material is melted into the rubber liquid flow, thereby realizing the thermoplastic molding of the rubber product.

[0059] S3, after the rubber liquid flow is injected into the forming mold 4, a certain pressure is maintained for a period of time to maintain the pressure and cool the rubber raw material in the forming mold 4 to compensate for the volume change of the rubber during the cooling and shrinkage process, thereby ensuring the dimensional accuracy and density of the rubber product.

[0060] S4: The speed reducer is used to drive the rotating shaft 22 to rotate in the opposite direction and simultaneously drive the rotating shaft 22 to slide in the direction away from the forming die 4, thereby resetting the rotating shaft 22. When the rotating shaft 22 rotates in the opposite direction, the unmelted rubber material outside the distributing drum 26 and the vibrating balls 28 inside the distributing drum 26 are driven by the spiral blades 24 to move to the end of the distributing drum 26 away from the forming die 4, thereby resetting the unmelted rubber particles and the vibrating balls 28, thereby allowing continuous processing of the rubber product.

[0061] S5, opening the forming mold 4, taking out the rubber product, and performing processes such as removing flash and inspecting the rubber product.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rubber molding device, characterized in that: It comprises a machine body (1), an injection tube (2), a hopper (3) and a forming die (4), wherein: The injection tube (2) comprises an outer tube (21), a rotating shaft (22), a partition (23), a spiral blade (24) and a heating sleeve (25); the outer tube (21) is fixedly arranged on the body (1); the rotating shaft (22) is rotatably and slidably arranged in the outer tube (21); the partition (23) is fixedly arranged on the rotating shaft (22) and is sealed against the inner wall of the outer tube (21); a liquid hole (201) is provided in the partition (23); the spiral blade (24) is fixedly arranged on the rotating shaft (22) and is in contact with the inner wall of the outer tube (21); the heating sleeve (25) is fixedly arranged on the outer side of the outer tube (21); The hopper (3) and the forming die (4) are both fixedly arranged on the machine body (1), and the two are connected via the outer tube (21); The injection tube (2) further comprises a distributing tube (26) and a plug (27), wherein the distributing tube (26) is fixedly arranged on a side of the partition (23) away from the forming die (4), the outer diameter of the distributing tube (26) is smaller than the inner diameter of the outer tube (21), and a filter hole (203) is provided on the circumference of the distributing tube (26); the plug (27) is sealed and fixed on an end of the distributing tube (26) away from the partition (23), and the outer diameter of the plug (27) gradually increases along a direction from an end away from the forming die (4) to an end close to the forming die (4); The distribution cylinder (26) includes a plurality of arc plates (261) and a plurality of connecting plates (262). The plurality of arc plates (261) are arranged in a circular array around the axis of the outer tube (21), and the spacing between the circumferential side of the arc plates (261) and the inner wall of the outer tube (21) gradually decreases along the circumference of the rotating shaft (22); the connecting plates (262) and the arc plates (261) are alternately arranged and fixedly connected to form a cylindrical structure, so as to extrude unmelted rubber particles and accelerate the melting efficiency of the rubber particles.

2. A rubber molding device according to claim 1, characterized in that: The rotating shaft (22) includes a sealing shaft (221), a feeding shaft (222) and a stirring shaft (223), wherein: The sealing shaft (221) is sealingly disposed in the outer tube (21) at one end away from the forming die (4), and is rotatably and slidably connected to the outer tube (21); The feeding shaft (222) is arranged in the outer tube (21) at one end close to the forming die (4), the outer diameter of the feeding shaft (222) is smaller than the inner diameter of the outer tube (21), and the feeding shaft (222) and the sealing shaft (221) are both coaxially arranged with the outer tube (21); The stirring shaft (223) is fixedly arranged between the sealing shaft (221) and the feeding shaft (222), and the stirring shaft (223) and the outer tube (21) are not arranged on the same axis; A feed port (202) is provided on the circumferential side of the outer tube (21), the hopper (3) is connected to the feed port (202), and the feed port (202) is located at an end of the stirring shaft (223) away from the feeding shaft (222).

3. A rubber molding device according to claim 2, characterized in that: A plurality of stirring shafts (223) are provided, and the distances between the axes of the plurality of stirring shafts (223) and the axis of the outer tube (21) are different; The ends of the plurality of stirring shafts (223) close to the sealing shaft (221) are flush with each other, and the plurality of stirring shafts (223) have different lengths.

4. A rubber molding device according to claim 3, characterized in that: The distance between the axis of the stirring shaft (223) and the axis of the outer tube (21) is inversely proportional to the outer diameter of the stirring shaft (223).

5. The rubber molding equipment according to claim 1, characterized in that: The material distributing cylinder (26) further comprises a plurality of material rods (263), wherein the material rods (263) are fixedly arranged on the arc plate (261), and the material rods (263) correspond to the arc plate (261) in a one-to-one manner; A plurality of slots (204) are evenly distributed along the axial direction on the circumferential side of the material rod (263), and the distance between two adjacent slots (204) is less than half the pitch of the spiral blade (24).

6. A rubber molding device according to claim 5, characterized in that: The injection tube (2) further includes a plurality of vibration balls (28), and the vibration balls (28) are arranged in the material distributing cylinder (26); One end of the connecting plate (262) close to the axis of the outer tube (21) is in an arc shape and extends toward the inner side of the arc plate (261).

7. The rubber molding equipment according to claim 2, characterized in that: The outer diameter of the feeding shaft (222) at one end close to the forming die (4) is larger than the outer diameter of the end away from the forming die (4).

8. A method for using the rubber molding equipment according to claim 6, characterized in that: The following steps are involved: S1, heating the heating jacket (25) and adding the recovered rubber raw material into the hopper (3); S2, first using a speed reducer to drive the rotating shaft (22) to rotate in a forward direction, and then driving the rotating shaft (22) to slide in a direction close to the forming mold (4), so as to melt the rubber raw material and transport it into the forming mold (4); S3, maintaining pressure and cooling the rubber raw material in the forming mold (4); S4, using a speed reducer to drive the rotating shaft (22) to rotate in the opposite direction, and simultaneously driving the rotating shaft (22) to slide in a direction away from the forming die (4), so as to move the unmelted rubber raw material outside the distributing cylinder (26) and the vibrating ball (28) inside the distributing cylinder (26) to the end of the distributing cylinder (26) away from the forming die (4); S5, opening the forming mold (4) and taking out the rubber product.

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