Demoulding structure for rubber expansion joint processing mould and demoulding method thereof

Abstract

The invention discloses a demolding structure for a rubber expansion joint processing mold and relates to the technical field of molds, the demolding structure comprises an upper mold, a lower mold and side molds located on the two sides of the upper mold and the lower mold, and the demolding method of the demolding structure for the rubber expansion joint processing mold comprises the steps that a limiting rod is locked with two limiting clamping blocks during mold closing; during demolding, the limiting rod is separated from the two limiting clamping blocks, and the limiting clamping seat drives the limiting clamping blocks to ascend and drives the linkage plate to synchronously ascend; through a clamping unlocking mechanism of the limiting clamping base, the limiting clamping block and the limiting rod, precise locking during mold closing and automatic unlocking during demolding are achieved, the synchronism of mold opening, closing and jacking actions is improved, the production efficiency is improved, and by matching with a combined structure of the linkage plate, the jacking block and the supporting spring, the mold opening and closing precision is improved. The composite jacking force is formed by the lifting acting force of the upper mold and the elastic force of the supporting spring, the adhesive force of the vulcanized rubber expansion joint and the mold groove can be effectively overcome, and demolding failure is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of molds, in particular to a demolding structure for a rubber expansion joint processing mold and a demolding method thereof. BACKGROUND

[0002] As a key component for compensating displacement and absorbing vibration in a pipeline system, the rubber expansion joint is mainly formed and processed by a mold vulcanization process. After vulcanization forming, the formed rubber expansion joint needs to be taken out from the mold groove by a demolding structure. The smoothness and stability of demolding directly affect the production efficiency, yield and surface quality of the product.

[0003] At present, the mainstream rubber expansion joint processing mold in the industry adopts a spring lifting type demolding structure. This type of structure usually sets a lifting block and a matching demolding spring in the lower mold. The lifting block is pushed up by the elastic restoring force of the spring, and then the rubber expansion joint in the mold groove is pushed out to realize demolding. However, in the actual production process, this traditional demolding structure has significant technical defects and cannot meet the needs of efficient and stable production.

[0004] Specifically, the rubber raw material will undergo cross-linking reaction in the vulcanization process. The formed rubber expansion joint is easy to form strong adhesion with the inner wall of the mold groove. At the same time, the rubber expansion joint itself has certain elastic deformation characteristics, which is easy to be pressed and extruded with the inner wall of the mold groove during demolding, further increasing the demolding resistance. In the traditional demolding structure, the lifting force of the demolding spring is usually a fixed value. When encountering the above-mentioned strong adhesion, it is easy to have the problem that the lifting force is not enough to overcome the adhesion, resulting in demolding failure. Demolding failure not only causes the rubber expansion joint blank to be unable to be smoothly taken out, but also may cause the blank surface to be scratched, deformed, or even the mold groove to be damaged due to forced taking. In addition, in order to solve this problem, manual assistance is needed to pry the blank in some production scenes, which not only increases the labor cost, but also has operation safety hazards, seriously affecting the production efficiency and product quality stability. SUMMARY

[0005] The present application aims to provide a demolding structure for a rubber expansion joint processing mold and a demolding method thereof to solve the problems raised in the background.

[0006] To solve the above technical problems, the present application provides the following technical solutions:

[0007] A demolding structure for a rubber expansion joint processing mold, comprising an upper mold, a lower mold and side molds on both sides of the upper mold and the lower mold, a through groove is formed on the lower mold, and a linkage plate is arranged inside the through groove.

[0008] Both ends of the linkage plate are fixedly connected with connecting seats, the top of the connecting seat is symmetrically provided with a sliding groove, the sliding groove is slidably connected with a sliding block, the top of the sliding block is fixedly connected with a limiting clamping block, both ends of the upper die are fixedly connected with a limiting clamping seat which is clamped with the limiting clamping block, both ends of the lower die are fixedly connected with a limiting rod which is slidably connected with the connecting seat and selectively clamped with the limiting clamping block.

[0009] In a further embodiment, a guide rod is fixedly sleeved at the center of the sliding block, one end of the guide rod penetrates to the outside of the connecting seat and is fixedly sleeved with a limiting disc, and a return spring is clamped between the limiting disc and the connecting seat.

[0010] In a further embodiment, a lifting groove is formed in the inside of the die groove of the lower die, a lifting block is clamped in the lifting groove, and the shaft rod bottom of the lifting block is fixedly connected with the top of the linkage plate.

[0011] In a further embodiment, a plurality of equidistantly arranged supporting springs are clamped at the bottom of the linkage plate, and the other ends of the supporting springs are clamped on the inner wall of the through groove.

[0012] In a further embodiment, a plurality of equidistantly arranged insertion rods are fixedly connected in the inside of the through groove, and the insertion rods are slidably connected with the linkage plate.

[0013] In a further embodiment, the upper die, the lower die and the side die are all equipped with mounting seats.

[0014] The application also provides a demolding method of the demolding structure of the rubber expansion joint processing die, comprising the following steps:

[0015] Step one, when the die is closed, the limiting clamping seat and the limiting clamping block are shrinkingly clamped, the limiting rod protrudes from the connecting seat and is placed between the two limiting clamping blocks to form a lock, and finally the side die is clamped on both sides of the die through external equipment driving to complete the die closing preparation for vulcanization;

[0016] Step two, when the die is demolded, after the vulcanization is completed, the limiting clamping seat moves upward to pull the connecting seat and the linkage plate along the upward movement through the clamping force, the lifting block synchronously lifts the blank, the limiting rod is stored to release the constraint on the limiting clamping block, and the upper die continues to move upward to press the limiting clamping block to avoid the clamping;

[0017] Step three, when the blank is taken out, the supporting spring continuously acts on the blank to separate the blank from the lower die, and the operator takes out the blank to complete the demolding;

[0018] Step four, after the blank is taken out, the die returns to the state of waiting for die closing, and waits for the next forming operation.

[0019] Compared with the prior art, the application has the following beneficial effects:

[0020] The application realizes accurate locking during mold closing and automatic unlocking during demolding through the clamping and unlocking mechanism of the limiting clamping seat, limiting clamping block and limiting rod, improves the synchronism of mold opening and closing and jacking actions, improves production efficiency, cooperates with the combined structure of the linkage plate, jacking block and supporting spring, utilizes the composite jacking force formed by the jacking force of the upper mold and the elastic force of the supporting spring, can effectively overcome the adhesion force between the vulcanized rubber expansion joint and the mold groove, and avoids demolding failure. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the embodiment of the application.

[0022] Figure 2 It is a partial structure sectional view of the embodiment of the application.

[0023] Figure 3 It is an exploded view of the partial structure of the embodiment of the application.

[0024] Figure 4 It is a partial structure sectional view of the embodiment of the application.

[0025] Figure 5 It is a sectional view of the lower mold of the embodiment of the application.

[0026] Figure 6 It is a partial structure sectional view of the embodiment of the application. Figure 1 It is an enlarged view of A in the embodiment of the application.

[0027] In the figure: 1, upper mold; 2, lower mold; 3, side mold; 4, through groove; 5, linkage plate; 6, connecting seat; 7, sliding groove; 8, sliding block; 9, limiting clamping block; 10, limiting clamping seat; 11, limiting rod; 12, guide rod; 13, limiting disc; 14, return spring; 15, jacking groove; 16, jacking block; 17, supporting spring; 18, insertion rod; 19, mounting seat. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0029] The embodiment discloses a rubber expansion joint processing die demolding structure, which comprises an upper die 1, a lower die 2 and side dies 3 on both sides of the upper die 1 and the lower die 2, a through groove 4 is formed in the lower die 2, a linkage plate 5 is arranged in the through groove 4, connecting seats 6 are fixedly connected at both ends of the linkage plate 5, sliding grooves 7 are symmetrically formed in the top of the connecting seats 6, sliding blocks 8 are slidably connected in the sliding grooves 7, limit clamping blocks 9 are fixedly connected at the top of the sliding blocks 8, limit clamping seats 10 that are clamped with the limit clamping blocks 9 are fixedly connected at both ends of the upper die 1, limit rods 11 that are slidably connected with the connecting seats 6 and selectively clamped with the limit clamping blocks 9 are fixedly connected at both ends of the lower die 2, and the like. Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6As shown, the linkage plate 5 is the core linkage component, and its two ends are fixedly connected with the connecting seat 6 and can slide up and down along the through groove 4 of the lower mold 2. When rising, it can synchronously drive the two end connecting seats 6 and the top matching component to move, realize the coordinated jacking of multiple components, transmit the pulling force of the upper mold 1 and the elastic force of the supporting spring 17 to the jacking block 16, form a composite jacking force, overcome the adhesion force of the rubber expansion joint and the mold groove, and the connecting seat 6 plays a connecting and guiding role. On the one hand, it fixes the linkage plate 5 and the sliding block 8 and provides a mounting base for the sliding block 8. On the other hand, it is in sliding cooperation with the limiting rod 11 fixedly connected with the lower mold 2, which ensures that the connecting seat 6 drives the linkage plate 5 to move linearly up and down and avoids deviation. The sliding groove 7 opened at the top provides a guide track for the displacement of the sliding block 8. The sliding block 8 can reciprocatingly slide along the sliding groove 7 of the connecting seat 6, and the top is fixedly connected with the limiting block 9, which can drive the limiting block 9 to realize the displacement of approaching or moving away from the limiting block 10. The center is fixedly sleeved with the guide rod 12, which can synchronously move the guide rod 12 and ensure the stability of the displacement process. The limiting block 9 is the core clamping component, which cooperates with the limiting block 10 of the upper mold 1 to realize clamping and unlocking. When the mold is closed, it can be clamped into the recess of the limiting block 10 to form preliminary positioning. When the limiting rod 11 protrudes from the connecting seat 6, the limiting block 9 is blocked by the limiting rod 11 to form locking, avoiding the displacement of the sliding block 8. After unlocking, the limiting block 10 can be separated from the limiting block 9 to ensure the smooth lifting of the upper mold 1. The limiting block 10 and the limiting block 9 are adapted, and the bottom is provided with a protruding inclined surface and an inner recess. When the mold is closed, the protruding inclined surface can extrude the limiting block 9 to make it shrink and approach, and the inner recess is used for clamping the limiting block 9 to realize preliminary positioning. When rising, the connecting seat 6 and the linkage plate 5 are synchronously lifted by the clamping force of the limiting block 9 to realize power transmission. When continuously rising, the limiting block 9 can be pressed to avoid, and the unlocking is completed. The limiting rod 11 plays a selective limiting role and is in sliding connection with the connecting seat 6. After the mold is closed, the limiting rod 11 protrudes from the connecting seat 6 and is located between the two limiting blocks 9, forming a physical block to lock the position of the limiting block 9, ensuring that the upper mold 1 and the lower mold 2 are tightly closed. When rising to the top end of the through groove 4, the limiting block 9 is completely immersed in the inside of the connecting seat 6, and the constraint on the limiting block 9 is released to realize unlocking.

[0030] Preferably, the upper mold 1, the lower mold 2 and the side mold 3 are all equipped with mounting seats 19, and the center of the sliding block 8 is fixedly sleeved with a guide rod 12. One end of the guide rod 12 penetrates to the outside of the connecting seat 6 and is fixedly sleeved with a limiting disc 13. The limiting disc 13 and the connecting seat 6 are clamped with a return spring 14, such as Figure 1 、 Figure 2 and Figure 6As shown, the guide rod 12 plays a guiding and limiting role, one end penetrates through the connecting seat 6 and the sliding block 8 to be fixedly sleeved, the other end is fixedly sleeved with the limiting disc 13, can guide the sliding block 8 to displace along a straight line, avoid the sliding block 8 to deviate, limit the displacement stroke of the sliding block 8 at the same time, ensure the accurate cooperation of the limiting block 9 and the limiting seat 10, the limiting disc 13 is fixedly connected with the end of the guide rod 12, is used for limiting the displacement range of the guide rod 12, avoid the guide rod 12 to be taken out from the connecting seat 6, provide the mounting support point for the reset spring 14 at the same time, make the reset spring 14 can be stably clamped between the limiting disc 13 and the connecting seat 6, the reset spring 14 has the elastic reset function, can provide the elastic recovery force when the mold is closed, push the sliding block 8 to drive the limiting block 9 to be clamped into the recess in the limiting seat 10, guarantee the clamping reliability, after the demolding is completed, the sliding block 8 and the limiting block 9 can be reset to the initial position, make the limiting rod 11 be stored back to the connecting seat 6, prepare for the next mold closing, the mounting seat 19 is respectively assembled in the upper mold 1, the lower mold 2 and the side mold 3, provide the stable installation and fixed structure for each mold main part, the mold and the external stroke equipment or platform are fixed together at the same time, guarantee the positioning accuracy of each part when the mold is closed, improve the sealing property and stability of the mold closing.

[0031] Further, the mold groove of the lower mold 2 is internally provided with a jacking groove 15, the jacking groove 15 is internally clamped with a jacking block 16, the shaft rod bottom of the jacking block 16 is fixedly connected with the top of the linkage plate 5, the bottom of the linkage plate 5 is clamped with a plurality of equidistantly arranged supporting springs 17, the other end of the supporting spring 17 is clamped on the inner wall of the through groove 4, the inside of the through groove 4 is fixedly connected with a plurality of equidistantly arranged inserting rods 18, the inserting rod 18 is slidingly connected with the linkage plate 5, as shown in FIG. 4 and Figure 5 As shown, the jacking groove 15 is arranged in the mold groove of the lower mold 2, provides the installation space and sliding guide for the jacking block 16, limits the jacking block 16 to only displace along the vertical direction, avoid the deviation and inclination during the jacking process, ensure the uniform jacking of the rubber expansion joint blank, the jacking block 16 is the core jacking execution part, is clamped in the jacking groove 15, the shaft rod bottom thereof is fixedly connected with the linkage plate 5, the linkage plate 5 is lifted to synchronously drive the jacking block 16 to move upward, directly acts on the bottom of the rubber expansion joint blank, realizes the separation of the blank and the mold groove of the lower mold 2, cooperates with the jacking effect of the elastic force of the supporting spring 17, the supporting spring 17 is equidistantly clamped between the bottom of the linkage plate 5 and the inner wall of the through groove 4, has the elastic supporting and power jacking functions, can be compressed to store the elastic potential energy when the mold is closed, releases the potential energy when the mold is demolded, provides the auxiliary jacking force for the lifting of the linkage plate 5, forms the compound power with the pulling force of the upper mold 1, effectively overcomes the adhesion force of the blank and the mold groove, the inserting rod 18 is equidistantly fixedly connected in the inside of the through groove 4, is slidingly connected with the linkage plate 5, provides the accurate guide for the up and down sliding of the linkage plate 5, avoid the linkage plate 5 to shake and jam during the displacement process, guarantees the linkage plate 5 to synchronously and stably move with the jacking block 16 and the connecting seat 6.

[0032] A rubber expansion joint processing mold demolding structure demolding method, comprising the following steps:

[0033] Step one, when the mold is closed, the mold groove inside the lower mold 2 is put into the joint to be vulcanized, the upper mold 1 moves downward, the limiting seat 10 at both ends of the upper mold 1 will contact with the limiting block 9 on the connecting seat 6, and the limiting seat 10 will drive the two limiting blocks 9 to shorten the distance, when the limiting block 9 is in the concave part of the limiting seat 10, under the action of the guide rod 12 and the return spring 14, the limiting block 9 is clamped in the concave part of the limiting seat 10, at this time the limiting rod 11 is inside the connecting seat 6, the upper mold 1 is pressed down until it is closed with the lower mold 2, during the pressing process, the limiting rod 11 protrudes from the connecting seat 6 to the top of the connecting seat 6, the limiting rod 11 is located between the two limiting blocks 9, forming a blockage and a clamping lock with the limiting block 9, ensuring that the limiting block 9 cannot move along the sliding groove 7, the two side molds 3 are driven by external stroke equipment to clamp the two side molds 3 on both sides of the upper mold 1 and the lower mold 2 respectively, facilitating vulcanization;

[0034] Step two, after vulcanization and molding is completed, the upper mold 1 applies an upward force to drive the limiting seat 10 to move upward, because the limiting block 9 cannot move along the sliding groove 7 under the action of the limiting rod 11, the clamping force of the limiting seat 10 and the limiting block 9 drives the connecting seat 6 to move upward, the upward movement of the connecting seat 6 drives the linkage plate 5 to slide upward along the insertion rod 18 in the through groove 4, at the same time, the jacking block 16 at the top of the linkage plate 5 moves upward, the jacking block 16 contacts the bottom of the rubber expansion joint blank and lifts the blank upward, when the connecting seat 6 drives the linkage plate 5 to move to the top of the through groove 4, the limiting rod 11 is inside the connecting seat 6, the limiting rod 11 no longer clamps the limiting block 9, the limiting block 9 can move along the sliding groove 7, when the upper mold 1 continues to rise, the limiting seat 10 presses the limiting block 9, the limiting block 9 avoids the action under the action of the force, until the limiting block 9 is completely separated from the clamping state of the limiting seat 10;

[0035] Step three, at this time the jacking block 16 separates the rubber expansion joint blank from the lower mold 2 under the action of mechanical tension, the supporting spring 17 continuously lifts the rubber expansion joint blank to separate the blank from the inner wall of the mold groove of the lower mold 2, the operator directly takes out the molded rubber expansion joint blank, and the demolding operation is completed;

[0036] Step four, after the blank is taken out, the sliding block 8 drives the limiting block 9 to reset to the initial position under the action of the pulling force of the return spring 14, the limiting rod 11 is re-stored in the inside of the connecting seat 6 and does not clamp with the limiting block 9, the mold returns to the state of waiting for mold closing, waiting for the next molding operation.

[0037] It should be noted that the parts have a life cycle, and can be replaced during regular maintenance when the performance cannot be achieved in the later period. The use effect is poor due to long-term use of the parts, which does not belong to the design defects of the application.

[0038] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely divergences of the principles and specific embodiments of the application and that numerous modifications, substitutions, changes, and adaptations can be made by those skilled in the art without departing from the spirit and scope of the application, which is defined by the appended claims.

Claims

1. A demolding structure for processing molds of rubber expansion joints, comprising an upper mold (1), a lower mold (2), and side molds (3) located on both sides of the upper mold (1) and the lower mold (2), characterized in that: The lower mold (2) is provided with a through groove (4), and a linkage plate (5) is provided inside the through groove (4); Both ends of the linkage plate (5) are fixedly connected to the connecting seat (6). The top of the connecting seat (6) is symmetrically provided with sliding grooves (7). The sliding groove (7) is slidably connected to the sliding block (8). The top of the sliding block (8) is fixedly connected to the limiting block (9). Both ends of the upper mold (1) are fixedly connected to the limiting seat (10) which engages with the limiting block (9). Both ends of the lower mold (2) are fixedly connected to the limiting rod (11) which is slidably connected to the connecting seat (6) and selectively engages with the limiting block (9).

2. The demolding structure for a rubber expansion joint processing mold according to claim 1, characterized in that: A guide rod (12) is fixedly sleeved at the center of the sliding block (8). One end of the guide rod (12) extends through to the outside of the connecting seat (6) and is fixedly sleeved with a limiting plate (13). A return spring (14) is engaged between the limiting plate (13) and the connecting seat (6).

3. The demolding structure for a rubber expansion joint processing mold according to claim 1, characterized in that: The lower mold (2) has a lifting groove (15) inside the mold groove, and a lifting block (16) is engaged inside the lifting groove (15). The bottom of the shaft of the lifting block (16) is fixedly connected to the top of the linkage plate (5).

4. The demolding structure for a rubber expansion joint processing mold according to claim 1, characterized in that: The bottom of the linkage plate (5) is fitted with a plurality of equidistant support springs (17), and the other end of the support springs (17) is fitted with the inner wall of the through groove (4).

5. The demolding structure for a rubber expansion joint processing mold according to claim 1, characterized in that: Multiple equally spaced insert rods (18) are fixed inside the through groove (4), and the insert rods (18) are slidably connected to the linkage plate (5).

6. The demolding structure for a rubber expansion joint processing mold according to claim 1, characterized in that: The upper mold (1), lower mold (2) and side mold (3) are all equipped with mounting bases (19).

7. The demolding method for a demolding structure for a rubber expansion joint processing mold according to claim 1, characterized in that: The demolding structure for processing molds of rubber expansion joints according to any one of claims 1-6 includes the following steps: Step 1: When the mold is closed, the limiting seat (10) and the limiting block (9) retract and engage, the limiting rod (11) protrudes from the connecting seat (6) and is placed between the two limiting blocks (9) to form a lock, and finally the side mold (3) is driven by external equipment to engage with both sides of the mold, completing the mold closing and preparing for vulcanization. Step 2: During demolding, after vulcanization, the limiting seat (10) moves upward and pulls the connecting seat (6) and the linkage plate (5) upward through the clamping force. The lifting block (16) simultaneously lifts the blank, and the limiting rod (11) retracts to release the constraint on the limiting block (9). The upper mold (1) continues to move upward to press the limiting block (9) to avoid it, and the two are disengaged. Step 3: When the part is ready to be removed, the support spring (17) continues to act to separate the blank from the lower mold (2), and the operator removes the blank to complete the demolding. Step 4: After removing the blank, the mold is returned to the ready-to-close state, waiting for the next molding operation.

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