A polymer rubber plate injection molding method

Abstract

The invention belongs to the field of rubber plate processing, and in particular relates to a polymer rubber plate injection molding processing method, which comprises the following steps: step 1: adding rubber particles and a vulcanizing agent into a processing device; step 2: breaking up the rubber particles and the vulcanizing agent, and grinding the rubber particles and the vulcanizing agent; step 3: mixing and heating the rubber and the vulcanizing agent, and injecting them into a mold through an injection molding head to obtain a polymer rubber plate; step 4: unclogging and wiping the injection molding head; step 5: demoulding the polymer rubber plate; the method can unclogging and wiping the injection molding head without manual regular cleaning.

Description

Technical Field

[0001] The invention belongs to the field of rubber plate processing, and in particular relates to a polymer rubber plate injection molding processing method. Background Art

[0002] Rubber sheets are mainly made of rubber and may contain reinforcing materials such as fabrics and metal sheets. They are sheet products with a certain thickness and a large area obtained by vulcanization. Due to their excellent wear resistance, high elasticity and good acid and alkali resistance, they are widely used in military defense, agriculture, forestry, water conservancy and industrial production. Polymer rubber sheets are a new type of material obtained by adding polymer materials to the rubber sheet during the molding process. The mechanical, corrosion resistance and electrical insulation properties of ordinary rubber sheets are enhanced, making the polymer rubber sheets more precise and have a wider range of uses. However, there are the following difficulties in the injection molding process of polymer rubber sheets: the injection head of the injection molding machine often becomes clogged and rubber drips, and manual cleaning is required on a regular basis. Summary of the Invention

[0003] In view of this, the technical problem to be solved by the present invention is to provide a polymer rubber plate injection molding method, which can dredge and wipe the injection head without manual regular cleaning.

[0004] The present invention provides a method for injection molding a polymer rubber plate, which comprises the following steps:

[0005] Step 1: Add rubber particles and vulcanizing agent into the processing device;

[0006] Step 2: breaking up the rubber particles and the vulcanizing agent, and grinding the rubber particles and the vulcanizing agent;

[0007] Step 3: Mix the rubber and the vulcanizing agent, heat them, and inject them into the mold through the injection head to obtain a polymer rubber sheet;

[0008] Step 4: Clear and wipe the injection head;

[0009] Step 5: Demolding the polymer rubber sheet.

[0010] The processing device includes a heating cylinder, an injection head is fixedly connected to the lower end of the heating cylinder, a blocking block is slidably connected inside the injection head, a spring is fixedly connected between the blocking block and the injection head, an ejector pin is fixedly connected to the lower end of the blocking block, and a plurality of scrapers are fixedly connected to the ejector pin.

[0011] An extrusion screw is rotatably connected in the heating cylinder.

[0012] The upper end of the extrusion screw is fixedly connected to a grinding disc, and the grinding disc and the inner wall of the heating cylinder are both made of frosted material.

[0013] The upper end of the grinding disc is fixedly connected to two driving rods, the grinding disc is fixedly connected to a first motor, and the grinding disc is fixedly connected to an output shaft of the first motor.

[0014] The processing device also includes a connecting seat, a cylinder is fixedly connected to the connecting seat, and the heating tube is fixedly connected to the moving end of the cylinder.

[0015] A turntable is rotatably connected to the connecting seat, and a plurality of mounting platforms are fixedly connected to the turntable.

[0016] The connecting seat is rotatably connected to a rotating plate, and the rotating plate is fixedly connected to a plurality of protrusions, and the number of the plurality of protrusions is equal to the number of the plurality of mounting platforms.

[0017] The rotating plate and the turntable are both fixedly connected with pulleys, and the two pulleys are connected by a synchronous belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0019] Figure 1 The following is a flow chart of a method for injection molding a polymer rubber sheet;

[0020] Figure 2 and Figure 3 Schematic diagram of the overall structure of the processing device;

[0021] Figure 4 and Figure 5 Schematic diagram of the structure of the heating tube;

[0022] Figure 6 Schematic diagram of the structure of the ejector pin;

[0023] Figure 7 It is a structural diagram of the connecting seat;

[0024] Figure 8 Schematic diagram of the structure of the turntable;

[0025] Figure 9 It is a cross-sectional view of the structure of the pulley;

[0026] Figure 10 Schematic diagram of the structure of the bump. DETAILED DESCRIPTION

[0027] The present invention is described in detail with reference to the accompanying drawings in the embodiments of the present invention.

[0028] A method for injection molding a polymer rubber plate comprises the following steps:

[0029] Step 1: Add rubber particles and vulcanizing agent into the processing device;

[0030] Step 2: breaking up the rubber particles and the vulcanizing agent, and grinding the rubber particles and the vulcanizing agent;

[0031] Step 3: Mix the rubber and the vulcanizing agent, heat them, and inject them into the mold through the injection head to obtain a polymer rubber sheet;

[0032] Step 4: Clear and wipe the injection head;

[0033] Step 5: Demolding the polymer rubber sheet.

[0034] See Figure 2-6 , shows a schematic diagram of an embodiment of the present invention in which the injection head 106 has an automatic dredging function, further,

[0035] The processing device includes a heating cylinder 101, the lower end of the heating cylinder 101 is fixedly connected to the injection head 106 by bolts, a block 201 is slidably connected inside the injection head 106, a spring 204 is welded and fixedly connected between the block 201 and the injection head 106, a pin 202 is welded and fixedly connected to the lower end of the block 201, and a plurality of scrapers 203 are welded and fixedly connected to the pin 202.

[0036] The heating cylinder 101 heats the rubber particles. First, the heating cylinder 101 is powered on for heating. Then, the rubber particles and the vulcanizing agent are added into the heating cylinder 101 and finally discharged through the injection head 106. The mold of the rubber sheet is placed under the injection head 106. The injection head 106 is moved downward by controlling the heating cylinder 101 to move downward. The injection head 106 is inserted into the mold to realize the injection molding function.

[0037] When the injection head 106 is inserted into the mold, the ejector pin 202 in the injection head 106 first contacts the inner wall of the mold, and then the ejector pin 202 slides into the injection head 106, and the ejector pin 202 drives the blocking block 201 to slide upward. The upward sliding of the blocking block 201 causes the injection head 106 to automatically open and start injection molding. Under normal conditions, the blocking block 201 blocks the injection head 106 due to the elastic action of the spring 204, thereby preventing the rubber in the injection head 106 from dripping out. When the ejector pin 202 slides upward, the ejector pin 202 can drive the multiple scrapers 203 to move upward. The multiple scrapers 203 scrape the inner wall of the injection head 106, thereby scraping the solidified rubber in the injection head 106 and avoiding blockage in the injection head 106.

[0038] When the injection is completed, the injection head 106 moves upward, and the ejector 202 is separated from the mold. The ejector 202 automatically resets under the elastic action of the spring 204, so that the blocking block 201 blocks the injection head 106, thereby preventing rubber from dripping when the injection head 106 is separated from the mold.

[0039] See Figure 5, showing a schematic diagram of an embodiment of the present invention capable of conveying rubber particles downward, further,

[0040] An extrusion screw 105 is rotatably connected to the heating cylinder 101 via a bearing.

[0041] After rubber particles are added to the heating cylinder 101 , the extrusion screw 105 is controlled to rotate, thereby transporting the rubber particles downward. The rubber particles are melted and mixed with the vulcanizing agent, and finally extruded through the injection head 106 .

[0042] See Figure 5 , shows a schematic diagram of an embodiment of the present invention that can avoid the phenomenon of agglomeration, further,

[0043] The upper end of the extrusion screw 105 is fixedly connected to the grinding disc 104 by bolts. The grinding disc 104 and the inner wall of the heating tube 101 are both made of frosted material.

[0044] After adding rubber particles to the heating cylinder 101, the grinding disc 104 is controlled to rotate. Since the grinding disc 104 is conical, the grinding disc 104 and the inner wall of the heating cylinder 101 are both made of frosted material. Therefore, the grinding disc 104 and the inner wall of the heating cylinder 101 cooperate to grind the rubber particles, thereby accelerating the melting of the rubber, avoiding agglomeration, and further improving the quality of the rubber sheet.

[0045] See Figure 5 , shows a schematic diagram of an embodiment of uniformly mixing rubber particles and a vulcanizing agent according to the present invention, further,

[0046] The upper end of the grinding disc 104 is fixedly connected to two driving rods 103 by bolts. The grinding disc 104 is fixedly connected to the first motor 102 by bolts. The grinding disc 104 is fixedly connected to the output shaft of the first motor 102 by a coupling.

[0047] The first motor 102 is started, and the first motor 102 drives the grinding disc 104 to rotate. The grinding disc 104 can grind the rubber particles while also driving the two beating rods 103 to rotate. When the staff adds the rubber particles and the vulcanizer to the heating cylinder 101, the two beating rods 103 can break up the rubber particles and the vulcanizer, thereby making the rubber particles and the vulcanizer evenly mixed, further improving the performance of the rubber sheet.

[0048] See Figure 2-3 and Figure 7 , shows a schematic diagram of an embodiment of the present invention that can drive the heating tube 101 to move upward or downward. Further,

[0049] The processing device further includes a connecting base 401 , to which a cylinder 404 is fixedly connected via bolts, and the heating tube 101 is fixedly connected to the movable end of the cylinder 404 via bolts.

[0050] By controlling the extension and contraction of the moving end of the cylinder 404 , the heating tube 101 can be driven to move upward or downward, thereby realizing the injection molding function.

[0051] See Figure 2-3 , shows a schematic diagram of an embodiment of the present invention capable of sequentially performing injection molding on multiple molds, further,

[0052] The connecting seat 401 is rotatably connected to the turntable 301 via a bearing. The turntable 301 is fixedly connected to a plurality of mounting platforms 302 via bolts. Each mounting platform 302 is provided with two mounting holes.

[0053] The mounting table 302 is used to fix the mold. The staff places multiple molds on multiple mounting tables 302 respectively, and then fixes the mold on the mounting table 302 by inserting bolts into the mounting holes. By controlling the rotation of the turntable 301, the heating cylinder 101 can inject multiple molds in sequence, realizing the function of continuous processing.

[0054] See Figure 9-10 , shows a schematic diagram of an embodiment of the present invention capable of dredging and wiping the injection head 106, further,

[0055] A rotating plate 501 is rotatably connected to the connecting seat 401 via a bearing. A plurality of protrusions 502 are fixedly connected to the rotating plate 501 via bolts. The number of the plurality of protrusions 502 is equal to the number of the plurality of mounting platforms 302 .

[0056] When the heating cylinder 101 moves downward to inject rubber into the mold, the heating cylinder 101 is located between the two protrusions 502. When the injection is completed, the heating cylinder 101 moves upward, the rotating plate 501 and the turntable 301 rotate synchronously, the turntable 301 rotates to switch the mounting platform 302, and the rotation of the rotating plate 501 drives the multiple protrusions 502 to rotate. One of the protrusions 502 contacts the ejector pin 202 on the injection head 106, causing the ejector pin 202 to slide upward, achieving the function of clearing the injection head 106 again, reducing the residual rubber in the injection head 106. When the ejector pin 202 completely enters the injection head 106, the injection head 106 contacts the top of the protrusion 502, and the protrusion 502 can wipe the end of the injection head 106, thereby preventing the residual rubber from clogging the end of the injection head 106 and affecting the next injection molding effect.

[0057] According to this operation, each time the mold is injected, one of the protrusions 502 will clear and wipe the injection head 106, thus eliminating the need for manual processing.

[0058] See Figure 7-9 , shows a schematic diagram of an embodiment of the present invention capable of synchronously controlling the rotating plate 501 and the turntable 301, further,

[0059] The rotating plate 501 and the rotating disc 301 are both fixedly connected with pulleys 402 via bolts, and the two pulleys 402 are connected via a synchronous belt.

[0060] When the rotating plate 501 rotates, the two pulleys 402 cooperate with the synchronous belt to drive the turntable 301 to rotate, thereby realizing the function of synchronous control of the rotating plate 501 and the turntable 301, and then realizing the position coordination of the protrusion 502 and the mounting platform 302, without the need for separate control, reducing operational difficulty.

[0061] See Figure 9 shows a schematic diagram of an embodiment of the present invention capable of driving the rotating plate 501 to rotate, further,

[0062] The second motor 403 is fixedly connected to the connecting base 401 via bolts, and the rotating plate 501 is fixedly connected to the output shaft of the second motor 403 via a coupling.

[0063] The second motor 403 is started, and the second motor 403 drives the rotating plate 501 to rotate, thereby realizing the function of moving the protrusion 502.

Claims

1. A method for injection molding a polymer rubber sheet, characterized in that: The following steps are involved: Step 1: Add rubber particles and vulcanizing agent into the processing device; Step 2: breaking up the rubber particles and the vulcanizing agent, and grinding the rubber particles and the vulcanizing agent; Step 3: Mix the rubber and the vulcanizing agent, heat them, and inject them into the mold through the injection head to obtain a polymer rubber sheet; Step 4: Clear and wipe the injection head; Step 5: Demolding the polymer rubber sheet; The processing device includes a heating cylinder, the lower end of which is fixedly connected to an injection head, a block is slidably connected to the injection head, a spring is fixedly connected between the block and the injection head, the lower end of the block is fixedly connected to an ejector pin, and a plurality of scrapers are fixedly connected to the ejector pin; an extrusion screw is rotatably connected to the heating cylinder; a grinding disc is fixedly connected to the upper end of the extrusion screw, and the grinding disc and the inner wall of the heating cylinder are both made of frosted material; two driving rods are fixedly connected to the upper end of the grinding disc, the grinding disc is fixedly connected to a first motor, and the grinding disc is fixedly connected to the output shaft of the first motor The processing device further comprises a connecting seat, a cylinder is fixedly connected to the connecting seat, and a heating cylinder is fixedly connected to the movable end of the cylinder; a turntable is rotatably connected to the connecting seat, and a plurality of mounting platforms are fixedly connected to the turntable; a rotating plate is rotatably connected to the connecting seat, and a plurality of protrusions are fixedly connected to the rotating plate, and the number of the plurality of protrusions is equal to the number of the plurality of mounting platforms; the ejector can drive the plurality of scrapers to move upward, and the plurality of scrapers scrape the inner wall of the injection head, thereby scraping the solidified rubber in the injection head to avoid blockage in the injection head; The injection head moves upward, the ejector pin leaves the mold, and the ejector pin automatically resets under the elastic action of the spring.

2. The method for injection molding a polymer rubber sheet according to claim 1, wherein: The rotating plate and the turntable are both fixedly connected with pulleys, and the two pulleys are connected by a synchronous belt.

3. The method for injection molding a polymer rubber sheet according to claim 2, wherein: The connecting seat is fixedly connected to the second motor, and the rotating plate is fixedly connected to the output shaft of the second motor.

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