A mold for processing rubber products and working method thereof

Abstract

The present invention discloses a mold for processing rubber products and a working method thereof, comprising a supporting base, a lower mold is installed at the middle position of the upper end surface of the supporting base, a vertical lifting plate is arranged above the supporting base, an upper mold is arranged at the bottom of the vertical lifting plate, a top plate is arranged above the vertical lifting plate, and lead screws are installed at the four corners between the top plate and the supporting base; it also includes an airtightness detection cavity, the airtightness detection cavity consists of a first annular groove and a second annular groove, the first annular groove is arranged on the upper end surface of the lower mold, and the second annular groove is arranged on the lower end surface of the upper mold; it also includes an injection pipe, which is arranged at the middle position of the upper end surface of the vertical lifting plate, the lower end of the injection pipe is connected with the molding groove of the upper mold, and the injection pipe is connected to the side of the injection pipe above the top plate, which solves the problem that the rubber mold is prone to safety hazards due to reduced tightness due to mold aging as the rubber mold is used for a long time.

Description

Technical Field

[0001] The invention relates to the technical field of rubber product processing, in particular to a mold for rubber product processing and a working method thereof. Background Art

[0002] Rubber products refer to products produced with natural and synthetic rubber as raw materials. The heated and melted raw materials need to be injected into the mold through a conveying pipe, and changed under the action of the molding cavity in the mold to obtain the required rubber products.

[0003] For example, the Chinese authorized patent "A Rubber Product Processing Injection Mold" with announcement number CN212860315U includes a first plate body and a second plate body. The surface on the right side of the first plate body is fixedly connected to a storage frame, and the right side of the inner ring of the storage frame is fixedly connected to a limit retaining ring. The top and bottom of the inner cavity of the storage frame are both horizontally provided with limit grooves, and the inner cavity of the limit groove is slidably connected to the limit block. After the mold is closed, the force is applied again, so that the fit between the two mold bodies is tighter, which solves the problem that when the injection mold is in use, the force cannot be applied after the mold is closed, which makes it easy for the two mold bodies to fit loosely, resulting in a certain gap, thereby causing the rubber products produced by the injection mold to have lower quality.

[0004] Although the above-mentioned prior art improves the overall tightness by applying force externally, with long-term use, the components will inevitably age, so the sealing condition cannot be known in the first time, which may easily cause safety hazards during the operation. Therefore, it does not meet the existing needs. In this regard, we propose a mold for rubber product processing and a working method thereof. Summary of the invention

[0005] The object of the present invention is to provide a mold for processing rubber products and a working method thereof, so as to solve the problem that the rubber mold mentioned in the above background technology is prone to safety hazards due to reduced tightness due to aging of the mold after long-term use.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A mold for processing rubber products and a working method thereof, comprising a support base, a lower mold is installed at the middle position of the upper end surface of the support base, a vertical lifting plate is arranged above the support base, an upper mold is arranged at the bottom of the vertical lifting plate, a top plate is arranged above the vertical lifting plate, and screws are installed at the four corners between the top plate and the support base, the screws penetrate the vertical lifting plate, and the screws and the vertical lifting plate are connected by ball nuts;

[0007] It also includes an airtightness detection cavity, which is composed of a first annular groove and a second annular groove, wherein the first annular groove is arranged on the upper end surface of the lower mold, and the second annular groove is arranged on the lower end surface of the upper mold, and after the upper mold and the lower mold are molded together, the first annular groove and the second annular groove constitute the airtightness detection cavity;

[0008] It also includes an injection pipe, which is arranged in the middle position of the upper end surface of the vertical lifting plate. The lower end of the injection pipe is connected to the molding groove of the upper mold, and the injection pipe passes through and extends to the top of the top plate. The injection pipe is connected to an air pipe on one side above the top plate.

[0009] Preferably, a sound and light alarm is installed on the front side of the upper end surface of the top plate, an air pressure sensor is installed on one side inside the second annular groove, and the output end of the air pressure sensor is electrically connected to the input end of the sound and light alarm through a single-chip microcomputer.

[0010] Preferably, a solenoid valve is installed on one side of the air delivery pipe close to the injection pipe, and an air pump is installed on the other end of the air delivery pipe.

[0011] Preferably, a coolant tank is provided inside the support base, a circulating pump is installed on one side of the coolant tank, and one end of the circulating pump is connected to the second annular groove through an outlet pipe, and one end of the first annular groove is connected to the coolant tank through an inlet pipe.

[0012] Preferably, a first rotating seat is installed on both sides of the upper mold, a rotating arm is installed inside the first rotating seat, a rubber product clamp is installed at the lower end of the rotating arm, and the rubber product clamp is connected to the lower end of the rotating arm through a second rotating seat, a locking bolt is provided on the front side of the second rotating seat, and one end of the locking bolt is threadedly connected to one end of the rotating arm, a servo motor is fixedly installed at the rear end of the first rotating seat, and the output shaft of the servo motor is transmission-connected to the other end of the rotating arm.

[0013] Preferably, a rubber pad is bonded and fixed to the bottom of the rubber product splint, and a vibration motor is installed inside the rubber product splint.

[0014] Preferably, the outer side of the upper end surface of the lower mold and the outer side of the lower end surface of the upper mold are both provided with annularly distributed rubber protrusions, and during the closing process of the lower mold and the upper mold, the rubber protrusions extend into the corresponding recesses respectively.

[0015] Preferably, one end of the water outlet pipe located outside the support base is in a spiral structure.

[0016] The working method of the mold for rubber product processing includes the following steps:

[0017] Step 1: Open the driving mechanism of the lead screw. Under the transmission of the lead screw, the vertical lifting plate drives the upper mold to gradually fit the lower mold until the first annular groove and the second annular groove are closed to each other to form an airtightness detection chamber. The air pressure sensor remains open, the valve at the top of the injection pipe is closed, the solenoid valve and the air pump are opened, and air enters the molding cavity between the lower mold and the upper mold through the injection pipe. If the tightness between the two is poor, air will flow out from the gap, resulting in an increase in the air pressure in the airtightness detection chamber. When the air pressure sensor reaches the set value, the sound and light alarm is turned on to notify the staff to perform maintenance and inspection;

[0018] Step 2: The air pressure in the air tightness detection cavity is kept at a normal state, the sound and light alarm displays a green light, the solenoid valve and the air pump are closed, and the heated and molten rubber raw material enters the molding cavity between the molds through the injection pipe for curing;

[0019] Step 3: Then the circulation pump is turned on to transport the liquid in the coolant tank from the upper mold to the air tightness detection cavity through the outlet pipe, and then return to the coolant tank from the lower mold, forming a circulation of coolant between the upper mold and the lower mold to cool the rubber product;

[0020] Step 4. After molding is completed, the coolant is recovered and the upper mold is gradually lifted under the transmission of the lead screw. During the lifting process, the servo motor is turned on to make one end of the rotating arm gradually move toward a vertical state until the rubber product splint fits the rubber product on the lower mold. With the help of the gradually rising vertical lifting plate, the rubber product is separated from the upper and lower molds. The staff can take out the rubber products between the rubber product splints.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention provides a first annular groove at the upper end of the lower mold and a second annular groove at the bottom of the upper mold. Under the transmission of the lead screw, the vertical lifting plate drives the upper mold to gradually fit the lower mold until the first annular groove and the second annular groove are closed to each other to form an airtightness detection chamber. On the one hand, the air pressure sensor remains open. At this time, the valve at the top of the injection pipe is closed, the solenoid valve and the air pump are opened, and air enters the molding cavity between the lower mold and the upper mold through the injection pipe. If the tightness between the two is poor, air will flow out from the gap to increase the air pressure in the airtightness detection chamber. After reaching the set value of the air pressure sensor, the sound and light alarm is turned on to notify the staff to perform maintenance and inspection. If the air pressure in the airtightness detection chamber remains in a normal state, the sound and light alarm displays a green light. At this time, the solenoid valve and the air pump are closed, and the heated and molten rubber raw material enters the molding cavity between the molds through the injection pipe for processing. In this way, the sealing between the molds can be detected before the rubber product is processed, thereby achieving rapid inspection and ensuring the safety of rubber product processing.

[0023] 2. The present invention provides a coolant tank inside the support base. After the sound and light alarm displays a green light, the circulation pump is turned on to transport the liquid in the coolant tank from the upper mold to the airtightness detection cavity through the water outlet pipe, and then returns to the coolant tank from the lower mold, forming a circulation of coolant between the upper mold and the lower mold, thereby cooling the rubber product and further improving the processing efficiency. In this way, the airtightness detection cavity is set as a cooling cavity under the premise of sealing between the upper and lower molds. Since it is close to the molding cavity, the cooling effect is further improved.

[0024] 3. The present invention provides rotating arms equipped with rubber product clamps on both sides of the upper mold. One end of the rotating arm remains in a horizontal state during the mold closing process. After molding is completed, the coolant is recovered and the upper mold is gradually lifted up under the transmission of the lead screw. During the lifting process, the servo motor is turned on to make one end of the rotating arm gradually move toward a vertical state until the rubber product clamp is in contact with the rubber product on the lower mold. Under the action of the internal vibration motor, the rubber product can be quickly separated from the lower mold, and the separation of the rubber product from the upper and lower molds is achieved by cooperating with the gradually rising vertical lifting plate. The staff can take out the rubber product between the rubber product clamps, and the processing efficiency is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A perspective view of the present invention;

[0026] Figure 2 It is a schematic diagram of the structure of the present invention in the mold closing state;

[0027] Figure 3 For the present invention Figure 2 A partial enlarged view of the middle A area;

[0028] Figure 4 It is a structural schematic diagram of the mold of the present invention in a separated state;

[0029] Figure 5 A three-dimensional diagram of the upper mold of the present invention;

[0030] Figure 6 For the present invention Figure 2 A partial enlarged view of area B.

[0031] In the figure: 1. Support base; 2. Vertical lifting plate; 3. Top plate; 4. Lower mold; 5. Upper mold; 6. Air tightness detection chamber; 7. Air pressure sensor; 8. Coolant tank; 9. Water inlet pipe; 10. Water outlet pipe; 11. Circulation pump; 12. Rotating arm; 13. Rubber product splint; 14. Injection pipe; 15. Sound and light alarm; 16. Screw; 17. Rubber bump; 18. First annular groove; 19. Second annular groove; 20. First rotating seat; 21. Servo motor; 22. Second rotating seat; 23. Locking bolt; 24. Rubber pad; 25. Vibration motor; 26. Air pipe; 27. Solenoid valve; 28. Air pump. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] See also Figure 1-6 , an embodiment of the present invention provides: a mold for processing rubber products and a working method thereof, comprising a support base 1, a lower mold 4 is installed at the middle position of the upper end surface of the support base 1, a vertical lifting plate 2 is arranged above the support base 1, an upper mold 5 is arranged at the bottom of the vertical lifting plate 2, a top plate 3 is arranged above the vertical lifting plate 2, and screws 16 are installed at the four corners between the top plate 3 and the support base 1, the screw 16 passes through the vertical lifting plate 2, and the screw 16 is connected to the vertical lifting plate 2 through a ball nut;

[0034] It also includes an airtightness detection chamber 6, which is composed of a first annular groove 18 and a second annular groove 19. The first annular groove 18 is arranged on the upper end surface of the lower mold 4, and the second annular groove 19 is arranged on the lower end surface of the upper mold 5. After the upper mold 5 is molded with the lower mold 4, the first annular groove 18 and the second annular groove 19 constitute the airtightness detection chamber 6;

[0035] It also includes an injection pipe 14, which is arranged in the middle position of the upper end surface of the vertical lifting plate 2. The lower end of the injection pipe 14 is connected to the molding groove of the upper mold 5, and the injection pipe 14 passes through and extends to the top of the top plate 3. The injection pipe 14 is located on one side above the top plate 3 and is connected to an air supply pipe 26.

[0036] See also Figure 1 A sound and light alarm 15 is installed on the front side of the upper end surface of the top plate 3, and an air pressure sensor 7 is installed on one side inside the second annular groove 19. The output end of the air pressure sensor 7 is electrically connected to the input end of the sound and light alarm 15 through a single-chip microcomputer, which can detect the sealing between molds before processing rubber products, thereby achieving rapid troubleshooting and ensuring the safety of rubber product processing.

[0037] See also Figure 1 , Figure 2 and Figure 4 A solenoid valve 27 is installed on one side of the air delivery pipe 26 close to the injection pipe 14, and an air pump 28 is installed on the other end of the air delivery pipe 26. The solenoid valve 27 can realize the opening and closing of the air circuit without affecting the transportation of the molten rubber.

[0038] See also Figure 2 and Figure 4 A coolant tank 8 is provided inside the support base 1, and a circulation pump 11 is installed on one side of the coolant tank 8. One end of the circulation pump 11 is connected to the second annular groove 19 through a water outlet pipe 10, and one end of the first annular groove 18 is connected to the coolant tank 8 through a water inlet pipe 9. On the premise that the upper and lower molds are sealed, the airtightness detection cavity 6 is set as a cooling cavity. Since it is close to the molding cavity, the cooling effect is further improved.

[0039] See also Figure 5 A first rotating seat 20 is installed on both sides of the upper mold 5, and a rotating arm 12 is installed inside the first rotating seat 20. A rubber product clamp 13 is installed at the lower end of the rotating arm 12, and the rubber product clamp 13 is connected to the lower end of the rotating arm 12 through a second rotating seat 22. A locking bolt 23 is provided on the front side of the second rotating seat 22, and one end of the locking bolt 23 is threadedly connected to one end of the rotating arm 12. A servo motor 21 is fixedly installed at the rear end of the first rotating seat 20, and the output shaft of the servo motor 21 is transmission-connected to the other end of the rotating arm 12, so as to realize the separation of the rubber product from the upper and lower molds, and the processing efficiency is further improved.

[0040] See also Figure 6 A rubber pad 24 is bonded and fixed to the bottom of the rubber product clamping plate 13 , and a vibration motor 25 is installed inside the rubber product clamping plate 13 . Under the action of the internal vibration motor 25 , the rubber product can be quickly separated from the lower mold 4 .

[0041] See also Figure 3 The outer side of the upper end surface of the lower mold 4 and the outer side of the lower end surface of the upper mold 5 are both provided with annularly distributed rubber bumps 17. During the mold closing process of the lower mold 4 and the upper mold 5, the rubber bumps 17 extend to the corresponding recesses respectively, thereby improving the sealing between the upper and lower molds, thereby improving the accuracy of the sealing detection.

[0042] See also Figure 1 , Figure 2 and Figure 4 One end of the water outlet pipe 10 located outside the support base 1 is in a spiral structure.

[0043] The working method of the mold for rubber product processing includes the following steps:

[0044] Step 1, open the driving mechanism of the lead screw 16, under the transmission of the lead screw 16, the vertical lifting plate 2 drives the upper mold 5 to gradually fit the lower mold 4, until the first annular groove 18 and the second annular groove 19 are closed to each other, forming an airtightness detection chamber 6, the air pressure sensor 7 remains open, the valve at the top of the injection pipe 14 is closed, the solenoid valve 27 and the air pump 28 are opened, and the air enters the molding cavity between the lower mold 4 and the upper mold 5 through the injection pipe 14. If the tightness between the two is poor, air will flow out from the gap, forming an increase in the air pressure of the airtightness detection chamber 6. After reaching the set value of the air pressure sensor 7, the sound and light alarm 15 is turned on to notify the staff to perform maintenance and inspection;

[0045] Step 2: The air pressure in the airtightness detection chamber 6 is kept at a normal state, the sound and light alarm displays a green light, the solenoid valve 27 and the air pump 28 are closed, and the heated and molten rubber raw material enters the molding cavity between the molds through the injection pipe 14 for curing;

[0046] Step 3: Then the circulation pump 11 is turned on to transport the liquid in the coolant tank 8 from the upper mold 5 to the air tightness detection cavity 6 through the outlet pipe 10, and then return to the coolant tank 8 from the lower mold 4, so that the coolant circulates between the upper mold 5 and the lower mold 4, thereby cooling the rubber product;

[0047] Step 4: After the molding is completed, the coolant is recovered, and the upper mold 5 is gradually lifted under the transmission of the lead screw 16. During the lifting process, the servo motor 21 is turned on to make one end of the rotating arm 12 gradually move toward a vertical state until the rubber product splint 13 fits the rubber product on the lower mold 4. With the help of the gradually rising vertical lifting plate 2, the rubber product is separated from the upper and lower molds, and the staff can take out the rubber product between the rubber product splint 13.

[0048] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A mold for processing rubber products, comprising a support base (1), a lower mold (4) is installed at the middle position of the upper end surface of the support base (1), a vertical lifting plate (2) is arranged above the support base (1), an upper mold (5) is arranged at the bottom of the vertical lifting plate (2), a top plate (3) is arranged above the vertical lifting plate (2), and screws (16) are installed at the four corners between the top plate (3) and the support base (1), the screw (16) passes through the vertical lifting plate (2), and the screw (16) and the vertical lifting plate (2) are connected by a ball nut, characterized in that: The mold further comprises an airtightness detection chamber (6), the airtightness detection chamber (6) comprising a first annular groove (18) and a second annular groove (19), the first annular groove (18) being arranged on the upper end surface of the lower mold (4), the second annular groove (19) being arranged on the lower end surface of the upper mold (5), and after the upper mold (5) and the lower mold (4) are molded together, the first annular groove (18) and the second annular groove (19) constitute the airtightness detection chamber (6); It also includes an injection pipe (14), which is arranged at the middle position of the upper end surface of the vertical lifting plate (2), the lower end of the injection pipe (14) is connected to the molding groove of the upper mold (5), and the injection pipe (14) passes through and extends to the top of the top plate (3), the injection pipe (14) is connected to an air supply pipe (26) on one side above the top plate (3), a solenoid valve (27) is installed on the side of the air supply pipe (26) close to the injection pipe (14), and an air pump (28) is installed on the other end of the air supply pipe (26), a coolant tank (8) is arranged inside the support base (1), a circulation pump (11) is installed on one side of the coolant tank (8), and one end of the circulation pump (11) is connected to the second annular groove (19) through a water outlet pipe (10), and one end of the first annular groove (18) is connected to the coolant tank (8) through a water inlet pipe (9).

2. A rubber product processing mold according to claim 1, characterized in that: An audible and visual alarm (15) is installed on the front side of the upper end surface of the top plate (3), an air pressure sensor (7) is installed on one side inside the second annular groove (19), and an output end of the air pressure sensor (7) is electrically connected to an input end of the audible and visual alarm (15) via a single-chip computer.

3. A rubber product processing mold according to claim 2, characterized in that: A first rotating seat (20) is installed on both sides of the upper mold (5), a rotating arm (12) is installed inside the first rotating seat (20), a rubber product clamping plate (13) is installed at the lower end of the rotating arm (12), and the rubber product clamping plate (13) is connected to the lower end of the rotating arm (12) through a second rotating seat (22), a locking bolt (23) is provided on the front side of the second rotating seat (22), and one end of the locking bolt (23) is threadedly connected to one end of the rotating arm (12), a servo motor (21) is fixedly installed at the rear end of the first rotating seat (20), and the output shaft of the servo motor (21) is drivingly connected to the other end of the rotating arm (12).

4. A rubber product processing mold according to claim 3, characterized in that: A rubber pad (24) is adhesively fixed to the bottom of the rubber product clamping plate (13), and a vibration motor (25) is installed inside the rubber product clamping plate (13).

5. A rubber product processing mold according to claim 4, characterized in that: The outer side of the upper end surface of the lower mold (4) and the outer side of the lower end surface of the upper mold (5) are both provided with annularly distributed rubber protrusions (17), and during the closing process of the lower mold (4) and the upper mold (5), the rubber protrusions (17) respectively extend into corresponding recesses.

6. A rubber product processing mold according to claim 5, characterized in that: One end of the water outlet pipe (10) located outside the support base (1) is in a spiral structure.

7. The working method of the rubber product processing mold according to claim 6, characterized in that: The steps include: Step 1: Open the driving mechanism of the lead screw (16). Under the transmission of the lead screw (16), the vertical lifting plate (2) drives the upper mold (5) to gradually fit the lower mold (4) until the first annular groove (18) and the second annular groove (19) are closed to form an airtightness detection chamber (6). The air pressure sensor (7) remains open, the valve at the top of the injection pipe (14) is closed, the solenoid valve (27) and the air pump (28) are opened, and air enters the molding cavity between the lower mold (4) and the upper mold (5) through the injection pipe (14). If the tightness between the two is poor, air will flow out from the gap, resulting in an increase in the air pressure of the airtightness detection chamber (6). When the air pressure reaches the set value of the air pressure sensor (7), the sound and light alarm (15) is turned on to notify the staff to carry out maintenance and inspection; Step 2: The air pressure in the air tightness detection chamber (6) is kept at a normal state, the sound and light alarm displays a green light, the solenoid valve (27) and the air pump (28) are closed, and the heated and molten rubber raw material enters the molding cavity between the molds through the injection pipe (14) for curing; Step 3: Then, the circulation pump (11) is turned on to transport the liquid in the coolant tank (8) from the upper mold (5) to the air tightness detection chamber (6) through the water outlet pipe (10), and then return to the coolant tank (8) from the lower mold (4), so that the coolant circulates between the upper mold (5) and the lower mold (4), thereby cooling the rubber product; Step 4: After the molding is completed, the coolant is recovered, and the upper mold (5) is gradually lifted under the transmission of the lead screw (16). During the lifting process, the servo motor (21) is turned on to make one end of the rotating arm (12) gradually move toward a vertical state until the rubber product clamping plate (13) fits the rubber product on the lower mold (4). With the help of the gradually rising vertical lifting plate (2), the rubber product is separated from the upper and lower molds, and the staff can take out the rubber product between the rubber product clamping plates (13).

Images