Viscoelastic damping product stripper and vulcanization process thereof

Abstract

The invention discloses a viscoelastic damping product stripper and a vulcanization process thereof.The stripper comprises a reverse ejection core rod screw, a movable ejection sleeve and a supporting base, the lower end of the movable ejection sleeve is rotationally connected into the upper end of the supporting base, and the reverse ejection core rod screw penetrates through the movable ejection sleeve and the supporting base from top to bottom; an internal thread matched with the reverse ejection core rod screw rod is arranged in a screw rod hole in the upper end of the movable ejection sleeve, an external thread is arranged on the reverse ejection core rod screw rod, a traction boss with a reduced outer diameter is arranged at the front end part of the reverse ejection core rod screw rod, and the traction boss is matched with a positioning pin in a mold and is used for vertically pulling out the positioning pin. By means of the staged temperature control vulcanization process, a framework and materials finish horizontal and vertical pulling-out or positioning of a mold positioning pin through a stripper by means of forward and reverse acting force and matched parts during thread working, mold opening is achieved, a product is easily taken out, the service life of the mold is effectively prolonged, the product quality is effectively improved, and the production efficiency is effectively improved.

Description

Technical Field

[0001] The invention belongs to the field of rubber material shock absorption and relates to a viscoelastic damping product demoulding device and a vulcanization process thereof. Background Art

[0002] Viscoelastic damping wall products are a type of passive shock-absorbing and energy-consuming products with a wide range of uses in the construction field. They have reliable performance, can effectively reduce wind vibration and earthquake response of buildings, and perform shock absorption. They have a wide range of engineering applicability. However, the purpose of the product determines the structure of the product. The product structure is large in size, so the skeleton size is large, the weight is large, the rubber elastomer size is large, the weight is large, the product vulcanization skeleton mold filling, rubber material mold filling, vulcanization process, metal materials, especially rubber elastic materials are affected by heat, pressure, time and other factors, the pressure in the mold is very high, the flow, expansion and extrusion of materials (including rubber materials, metal materials) and other normal vulcanization states appear, resulting in more flash rubber will squeeze into the gap of the positioning pin, causing difficulty in removing the mold and taking the product. In addition, the conventional method of using a lever to pry open the mold is very easy to damage the mold, damage the product, affect production efficiency, and affect the stability of product quality. Therefore, advanced vulcanization technology and advanced demolding methods are urgently needed to solve the above problems, improve production efficiency, and stabilize product quality. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the existing vulcanization process of viscoelastic damping products, and provide a viscoelastic damping product mold ejector and its vulcanization process. Through a staged temperature-controlled vulcanization process, the skeleton and the material are completed through the mold ejector using the positive and negative forces of the thread when working and its supporting components to complete the horizontal and vertical pulling out or positioning of the mold locating pin, realize mold opening, and easily take out the product, effectively improve the service life of the mold, effectively improve product quality, and effectively improve production efficiency.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] On the one hand, the present invention provides a viscoelastic damping product demolding device, which includes an anti-top core rod screw located at the upper part, a movable top sleeve located in the middle part and a supporting base located at the lower part, the lower end of the movable top sleeve is rotatably connected to the upper end of the supporting base, the anti-top core rod screw penetrates the movable top sleeve and the supporting base from top to bottom, the screw hole at the upper end of the movable top sleeve is provided with an internal thread matching the anti-top core rod screw, the anti-top core rod screw is provided with an external thread, and the front end part is provided with a traction boss with a smaller outer diameter, the traction boss cooperates with the locating pin in the mold for vertically pulling out the locating pin.

[0006] Furthermore, a stepped slot is provided in the support base, and the lower end of the movable top sleeve is located in the upper end groove of the support base.

[0007] Furthermore, a plane bearing is provided between the movable top sleeve and the supporting base to assist the rotational connection between the two.

[0008] Furthermore, the traction boss is provided with external threads around it, the upper end of the positioning pin is provided with an opening, the opening is provided with an internal thread, and the traction boss and the positioning pin are connected through threads.

[0009] Furthermore, the reverse top core rod screw and the upper end of the movable top sleeve are configured as polygonal structures for connecting with a wrench for forward and reverse rotation.

[0010] Furthermore, the sizes and profiles of the reverse top mandrel screw, movable top sleeve and support base are selected as follows:

[0011] Reverse mandrel screw: φ20mm~40mm, made of 45# steel or P20;

[0012] Component top cover: φ50mm~70mm, material 45# steel or P20;

[0013] Support base: φ60mm~80mm, material 45# steel or P20.

[0014] On the other hand, the present invention also provides a vulcanization process for a viscoelastic damping product, which comprises the following steps:

[0015] Step 1, rubber material preparation;

[0016] Step 2: Plate preparation;

[0017] Step 3, mold closing and vulcanization, respectively carry out the skeleton mold filling positioning, film mold filling positioning and mold closing positioning, mold closing and exhaust 10 to 12 times, and enter the staged temperature control vulcanization;

[0018] Step 4: Open the mold and take out the product. First, open the mold cover, then use the mold remover to take out several positioning pins in the product, then use a large suction cup to suck up the product frame, and finally use horizontal and even force to take out the product and place it horizontally on the product rack;

[0019] Step 5: trim the product and remove the flash;

[0020] Step 6: Product inspection: check product dimensions according to product drawings.

[0021] Furthermore, in step 3, temperature-controlled vulcanization is performed in three stages: in the first stage, the temperature is 115-120°C, 1 hour, and the pressure is 15-18 MPa; in the second stage, the temperature is 145-150°C, 2 hours, and the pressure is 15-18 MPa; in the third stage, the temperature is 115-120°C, 1 hour, and the pressure is 15-18 MPa.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The mold remover of the present invention utilizes the strong force and uniform speed force generated by the positive and negative forces of the thread when it is working and its supporting parts to complete the removal or positioning of the mold positioning pin, so that the mold can be opened smoothly and the product can be easily taken out, thereby effectively improving product quality and effectively improving production efficiency.

[0024] (2) The mold ejector of the present invention has horizontal and vertical positioning functions. When the mold is opened, the mold ejector is placed horizontally and the positioning pins are pulled out vertically without damaging the mold positioning pins and the mold, and without damaging the product. The mold ejector is suitable for mold ejection operations on products that are difficult to eject or have skeletons, and is particularly suitable for large-scale viscoelastic damping products. It can effectively increase the service life of the mold and effectively stabilize product quality.

[0025] (3) When the positioning pin is deformed and locked in the positioning hole, the mold remover of the present invention can be pulled out by utilizing the strong force generated by the positive and negative forces of the thread and its supporting parts when the thread is working, without affecting the replacement of the positioning pin. This shows that the mold remover of the viscoelastic damping product of the present invention has multiple functions.

[0026] (4) The dimensions of the mold ejector, the mold ejector and the mold ejector parts of the present invention match the dimensions of the mold and the product, and the dimensions can be flexibly adjusted. The large-sized mold ejector and the mold ejector parts have a large mold ejection force, while the small-sized mold ejector and the mold ejector parts have a small mold ejection force. The mold ejector for a viscoelastic damping product of the present invention is suitable for the vulcanization process of viscoelastic damping products with skeletons of different specifications.

[0027] (5) The vulcanization process of the viscoelastic damping product of the present invention adopts a uniform step vulcanization temperature control process. Under the condition of the same pressure, it improves the synchronization between the temperature rise rate and the flow rate of the material, improves the proximity between the frame temperature and the material temperature, improves the uniformity of the vulcanization and cross-linking of the material of the thick frame product, and stabilizes the product quality.

[0028] (6) The vulcanization process of the viscoelastic damping product of the present invention is matched with the viscoelastic damping product mold ejector, which is even more powerful. The mold ejector can pull out the mold to position and the product positioning pin is difficult to operate. The auxiliary high-power suction cup can lift the mold parts, frame and product, which reduces manual operation and thus reduces operation intensity, significantly improves production efficiency and ensures product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the mold stripper for the viscoelastic damping product of the present invention;

[0030] Figure 2 It is a schematic diagram of the disassembled structure of the viscoelastic damping product mold ejector of the present invention.

[0031] Marked in the figure: 1-reverse top core rod screw, 2-movable top sleeve, 3-support base, 4-traction boss. DETAILED DESCRIPTION

[0032] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figure 1 As shown, a viscoelastic damping product demolding device includes an anti-top core rod screw 1 located at the upper part, a movable top sleeve 2 located in the middle part and a supporting base 3 located at the lower part, the lower end of the movable top sleeve 2 is rotatably connected to the upper end of the supporting base 3, the anti-top core rod screw 1 penetrates the movable top sleeve 2 and the supporting base 3 from top to bottom, the screw hole at the upper end of the movable top sleeve 2 is provided with an internal thread matching the anti-top core rod screw 1, the anti-top core rod screw 1 is provided with an external thread, and a traction boss 4 with a reduced outer diameter is provided at its front end, wherein the traction boss 4 cooperates with the locating pin in the mold for vertically pulling out the locating pin, the traction boss 4 is provided with external threads around, the upper end of the locating pin is provided with an opening, the opening is provided with an internal thread, and the traction boss 4 is connected to the locating pin through a threaded form.

[0034] The support base 3 is provided with a stepped slot, and the lower end of the movable top sleeve 2 is located in the upper end groove of the support base 3. A plane bearing is provided between the movable top sleeve 2 and the support base 3 to assist the rotation connection between the two. The bottom surface of the support base 3 is a horizontal smooth surface, which directly contacts the mold or the product frame.

[0035] The upper ends of the reverse top core rod screw and the movable top sleeve are configured as polygonal structures (similar to a nut) for connecting with a wrench for forward and reverse rotation.

[0036] When the viscoelastic damping product mold remover is in operation, the traction boss 4 at the bottom end of the reverse-top core rod screw 1 is first connected to the opening at the upper end of the positioning pin, and then the reverse-top core rod screw 1 is moved upward by rotating the movable top sleeve 2 using the positive and reverse forces of the thread when working, thereby pulling out the positioning pin.

[0037] The following is a detailed explanation with reference to some specific cases.

[0038] Example 1

[0039] A vulcanization process for a viscoelastic damping product comprises the following steps:

[0040] Step 1, rubber material preparation, the mixed rubber sheet is parked for more than 24 hours and can be used, and the size of the rubber sheet meets the size of the mold cavity;

[0041] Step 2: Plate preparation, the plate size meets the mold cavity size, the plate is sandblasted, the adhesive is applied, and it is parked for more than 24 hours before use;

[0042] Step 3, mold closing and vulcanization, respectively perform skeleton mold filling positioning, film mold filling positioning and mold closing positioning, mold closing and exhaust 10 to 12 times, and enter staged temperature control vulcanization. In the first stage, the temperature is 115 to 120°C, 1 hour, and the pressure is 15 to 18 MPa; in the second stage, the temperature is 145 to 150°C, 2 hours, and the pressure is 15 to 18 MPa; in the third stage, the temperature is 115 to 120°C, 1 hour, and the pressure is 15 to 18 MPa;

[0043] Step 4: Open the mold and take out the product. Open the mold cover respectively. The mold remover takes out several positioning pins in the product. The large suction cup sucks the product skeleton (gravity part). Apply force evenly horizontally to take out the product and place it horizontally on the product rack. Clean the mold and set it aside for use after cleaning.

[0044] Step (5), trimming the product, using a special series of shape tools to remove the flash;

[0045] Step (6), product inspection, use a vernier caliper and a tape measure to check the product size according to the product drawing.

[0046] The specifications of the viscoelastic damping product demoulding device used in this embodiment are as follows:

[0047] Anti-top mandrel screw: φ20mm, made of 45# steel;

[0048] Movable top sleeve: φ50mm, made of 45# steel;

[0049] Support base: φ60mm, material 45# steel;

[0050] Component bearing: A flat bearing is embedded in the middle of the base.

[0051] The dimensions of the viscoelastic damping product in this embodiment are: length 800 mm, width 400 mm.

[0052] The properties of the viscoelastic damping product obtained in Example 1 are shown in Table 1

[0053]

[0054] The viscoelastic damping product mold ejector and its vulcanization process used in this embodiment have smooth vulcanization demolding, and the demolding time is 15 minutes (if the mold ejector is not used, the demolding time is 30 minutes). With the matching vulcanization process, the product size produced meets the standards, the mold has no obvious damage, the product qualification rate is 100%, and the product qualification rate is 92% if the mold ejector is not used. This shows that the viscoelastic damping product mold ejector and its vulcanization process in this embodiment are feasible.

[0055] Example 2

[0056] The specifications of the viscoelastic damping product demoulding device used in this embodiment are as follows:

[0057] Anti-top mandrel screw: φ30mm, made of 45# steel;

[0058] Movable top sleeve: φ60mm, made of 45# steel;

[0059] Support base: φ70mm, material 45# steel;

[0060] Component bearing: A flat bearing is embedded in the middle of the base.

[0061] The dimensions of the viscoelastic damping product in this embodiment are: length 1200 mm, width 600 mm.

[0062] The properties of the viscoelastic damping product obtained in Example 2 are shown in Table 2

[0063]

[0064] The viscoelastic damping product mold ejector and its vulcanization process used in this embodiment have smooth vulcanization demolding, and the demolding time is 18 minutes (if the mold ejector is not used, the demolding time is 38 minutes). With the matching vulcanization process, the product size produced is in line with the standard, the mold has no obvious damage, the product qualification rate is 100%, and if the mold ejector is not used, the product qualification rate is 90%, which shows that the viscoelastic damping product mold ejector and its vulcanization process in this embodiment are feasible.

[0065] Example 3

[0066] The specifications of the viscoelastic damping product demoulding device used in this embodiment are as follows:

[0067] Anti-top mandrel screw: φ35mm, made of 45# steel;

[0068] Movable top sleeve: φ65mm, made of 45# steel;

[0069] Support base: φ75mm, material 45# steel;

[0070] Component bearing: A flat bearing is embedded in the middle of the base.

[0071] The dimensions of the viscoelastic damping product in this embodiment are: length 1600 mm, width 800 mm.

[0072] The properties of the viscoelastic damping product obtained in Example 3 are shown in Table 3

[0073]

[0074] The viscoelastic damping product mold ejector and its vulcanization process used in this embodiment have smooth vulcanization demolding, and the demolding time is 20 minutes (if the mold ejector is not used, the demolding time is 40 minutes). With the matching vulcanization process, the product size produced meets the standards, the mold has no obvious damage, the product qualification rate is 100%, and if the mold ejector is not used, the product qualification rate is 86%, which shows that the viscoelastic damping product mold ejector and its vulcanization process in this embodiment are feasible.

[0075] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the protection scope of the present invention in any form, and all technical solutions obtained by equivalent replacement and the like fall within the protection scope of the present invention.

[0076] The parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art.

Claims

1. A viscoelastic damping product demoulding device, characterized in that: It includes an anti-top core rod screw at the upper part, a movable top sleeve at the middle part and a supporting base at the lower part, the lower end of the movable top sleeve is rotatably connected to the upper end of the supporting base, the anti-top core rod screw penetrates the movable top sleeve and the supporting base from top to bottom, the screw hole at the upper end of the movable top sleeve is provided with an internal thread matching the anti-top core rod screw, the anti-top core rod screw is provided with an external thread, and a traction boss with a smaller outer diameter is provided at its front end, the traction boss cooperates with the locating pin in the mold for vertically pulling out the locating pin.

2. A viscoelastic damping product demoulding device according to claim 1, characterized in that: A stepped slot is provided in the support base, and the lower end of the movable top sleeve is located in the upper end groove of the support base.

3. A viscoelastic damping product demoulding device according to claim 1, characterized in that: A plane bearing is arranged between the movable top sleeve and the supporting base to assist the rotational connection between the two.

4. A viscoelastic damping product demoulding device according to claim 1, characterized in that: The traction boss is provided with external threads around it, and the upper end of the positioning pin is provided with an opening, and the opening is provided with internal threads, and the traction boss and the positioning pin are connected with each other through threads.

5. A viscoelastic damping product demoulding device according to claim 1, characterized in that: The reverse top core rod screw and the upper end of the movable top sleeve are set as polygonal structures, which are used to be connected with a wrench for forward and reverse rotation.

6. A viscoelastic damping product demoulding device according to claim 1, characterized in that: The sizes and profiles of the reverse top mandrel screw, movable top sleeve and support base are selected as follows: Reverse mandrel screw: φ20mm~40mm, made of 45# steel or P20; Component top cover: φ50mm~70mm, material 45# steel or P20; Support base: φ60mm~80mm, material 45# steel or P20.

7. A vulcanization process for viscoelastic damping products, characterized in that: The following steps are involved: Step 1, rubber material preparation; Step 2: Plate preparation; Step 3, mold closing and vulcanization, respectively carry out the skeleton mold filling positioning, film mold filling positioning and mold closing positioning, mold closing and exhaust 10 to 12 times, and enter the staged temperature control vulcanization; Step 4, opening the mold to take out the product, first open the mold cover, then use the mold remover described in any one of claims 1 to 6 to take out a number of positioning pins in the product, then use a large suction cup to suck the product frame, and finally use horizontal and uniform force to take out the product and place it horizontally on the product rack; Step 5: trim the product and remove the flash; Step 6: Product inspection: check product dimensions according to product drawings.

8. A vulcanization process for viscoelastic damping products according to claim 7, characterized in that: In step 3, temperature-controlled vulcanization is performed in three stages: the first stage is at a temperature of 115-120° C., for 1 hour, and a pressure of 15-18 MPa; the second stage is at a temperature of 145-150° C., for 2 hours, and a pressure of 15-18 MPa; the third stage is at a temperature of 115-120° C., for 1 hour, and a pressure of 15-18 MPa.

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