CN106426807B - Caoutchouc elasticity node injection molding - Google Patents

Abstract

The present invention proposes a rubber elastic node injection mold, including an upper mold, a lower mold and a middle mold, wherein the upper mold includes a top plate located on the top of the upper mold, an upper mandrel fixing plate arranged below the top plate, and fixedly arranged on the upper mandrel The upper mandrel of the fixed plate is arranged on the push plate below the upper mandrel fixed plate, and the stopper that can limit the upper mandrel fixed plate to move in the vertical direction; the lower mold includes a base plate at the bottom, and is fixedly arranged on the The lower mandrel on the bottom plate; the middle mold includes a lower push plate arranged above the bottom plate, corresponding to the clamping block between the adjacent lower mandrels and fixedly arranged on the top of the lower push plate, and a horizontal slide along the top of the lower push plate slider. The invention can efficiently take out the vulcanized rubber elastic nodes from the mold, and at the same time, can meet the requirements of mass production of the rubber elastic nodes.

Description

Rubber Elastic Node Injection Mold

technical field

The invention belongs to the technical field of molds, in particular to a rubber elastic joint injection mold.

Background technique

Rubber elastic joints are widely used in rail vehicle bogies to play the functions of vibration reduction and vibration isolation, which play an important role in the safety, comfort and stability of vehicle operation. Referring to Figure 1(a), Figure 1(b) and Figure 1(c), the rubber elastic node is composed of a mandrel 19, a jacket 20 and a rubber 21, wherein the mandrel 19, the jacket 20 and the rubber 21 are bonded by thermal vulcanization Vulcanized together, the rubber type 21 faces are separated with two through holes.

The characteristics of the rubber elastic nodes shown in Fig. 1(a), Fig. 1(b) and Fig. 1(c) are: (1) Since the transition zone between the mandrel 19 and the rubber 21 at the end is straight, therefore, in the high-pressure injection During the sizing process, the sizing material will inevitably enter the gap between the mandrel 19 skeleton and the mold; (2) the length of the end of the mandrel 19 skeleton embedded in the mold is longer; (3) in order to meet the requirements of rubber elastic nodes in use Due to the different rigidity requirements in the transverse and longitudinal directions, the profile part of the rubber 21 is designed to have a structure with through holes. The characteristics of the above three aspects will cause the rubber elastic node to be clamped in the mold, which in turn makes it difficult to remove the rubber elastic node from the mold after vulcanization.

In order to solve the problem of difficult mold release of rubber elastic joints, the existing method is to use single-cavity molds when designing vulcanization molds, which leads to low efficiency and cannot meet the requirements of mass production.

Contents of the invention

Aiming at the technical problem that it is difficult to remove the vulcanized rubber elastic nodes from the mold, the present invention proposes a rubber elastic node that efficiently removes the vulcanized rubber elastic nodes from the mold, and at the same time, can meet the mass production requirements of the rubber elastic nodes Injection mold.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A rubber elastic node injection mold, comprising an upper mold, a lower mold and a middle mold, wherein the upper mold includes a top plate positioned on the top of the upper mold, an upper core mold fixing plate arranged below the top plate, and a fixed plate fixed on the upper core mold fixing plate The upper mandrel, the upper push plate arranged under the upper mandrel fixed plate, and the stopper that can limit the upper mandrel fixed plate to move in the vertical direction, the upper mandrel is a plurality of arranged side by side, and the upper push plate corresponds to The upper mandrel is provided with a plurality of first through holes, and the diameter of the first through holes is smaller than the outer diameter of the rubber elastic node jacket;

The lower mold includes a base plate at the bottom, and a lower mandrel fixedly arranged on the base plate, and the lower mandrel is a plurality of sets corresponding to the upper mandrel;

The middle mold includes a lower push plate arranged above the bottom plate, and a clamp block corresponding to the space between the adjacent lower mandrels and fixedly arranged on the top of the lower push plate. The second through hole on the upper part of the lower mandrel, the diameter of the second through hole is smaller than the outer diameter of the rubber elastic node jacket, and the two ends of the lower push plate along the horizontal direction are provided with sliders that can slide horizontally along the top of the lower push plate. A third through hole that can clamp the outer circumferential surface of the rubber elastic node jacket is formed between the clamp block;

The upper mandrel, the clamping block, the slide block and the lower mandrel form a cavity capable of accommodating rubber elastic nodes.

Preferably, a guide is provided between the top plate and the upper mandrel fixing plate to move the upper mandrel fixing plate in the vertical direction, the top of the guide is fixedly connected to the top plate, and the limiter is arranged at the bottom of the guide.

Preferably, the guide member is a guide rod, and the upper mandrel fixing plate is slidably connected with the guide rod.

Preferably, the limiting member is a retaining ring sleeved on the bottom end of the guide rod.

As a preference, the end of the slider near the outside of the mold is fixedly connected with a push-pull rod that can drive the slider to move horizontally, and the end of the push-pull rod near the slider is provided with a locking piece, and the locking piece is provided with a sleeve corresponding to the push-pull rod that can be connected with the push-pull rod. The connecting groove, the locking piece and the slider are crimped in the horizontal direction, and the locking piece is detachably connected with the upper push plate.

Preferably, the groove of the locking piece fits with the push-pull rod in clearance, and the locking piece is fixedly connected with the upper push plate through threads.

Preferably, the two ends of the upper push plate along the horizontal direction are fixedly provided with an upper hanging plate that can push the upper push plate to move in the vertical direction.

Preferably, the two ends of the lower push plate in the horizontal direction are fixedly provided with lower brackets that can push the lower push plate to move in the vertical direction.

Preferably, the bottom of the lower mandrel is provided with a fourth through hole.

Compared with prior art, advantage and positive effect of the present invention are:

(1) The rubber elastic joint injection mold of the present invention can efficiently remove the vulcanized rubber elastic joint from the mold, and at the same time, can meet the requirements for mass production of the rubber elastic joint.

(2) The rubber elastic node injection mold of the present invention is provided with an upper push plate and a stopper, so that when the rubber elastic node sticks in the upper mandrel, the decline of the upper push plate can realize a plurality of rubber elastic nodes simultaneously from The upper mandrel comes out, and at the same time, by directly applying pressure to the outer shell of the rubber elastic node, the stress on the rubber elastic node is uniform during the whole process of coming out.

(3) The rubber elastic node injection mold of the present invention is provided with a lower push plate, so that when the rubber elastic node sticks in the lower mandrel, multiple rubber elastic nodes can be simultaneously released from the lower mandrel by the rise of the lower push plate , at the same time, by directly exerting pressure on the outer shell of the rubber elastic node, the stress on the rubber elastic node is uniform during the whole process of detachment.

Description of drawings

Figure 1(a) is a full-section front view of the rubber elastic joint;

Figure 1(b) is a full cut-away left view of the rubber elastic node;

Figure 1(c) is a top view of the rubber elastic node;

Fig. 2 is the top view of the structure of the rubber elastic node injection mold of the present invention;

Fig. 3 is a sectional view along A-A in Fig. 2;

Fig. 4 is a sectional view along B-B in Fig. 2;

Fig. 5 is a working principle diagram of the rubber elastic node injection mold of the present invention.

In the above figures: 1. top plate; 2. upper mandrel fixing plate; 3. upper mandrel; 4. upper push plate; 5. limit piece; 6. first through hole; 7. bottom plate; 8. push down Plate; 9, lower mandrel; 10, clamp block; 11, second through hole; 12, slider; 13, third through hole; 14, guide piece; 15, push-pull rod; 16, locking piece; 17, Upper hanging board; 18, lower bracket; 19, mandrel; 20, jacket; 21, rubber.

Detailed ways

In the following, the present invention will be specifically described through exemplary embodiments. It should be understood, however, that elements, structures and characteristics of one embodiment may be beneficially incorporated in other embodiments without further recitation.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the positional relationship shown in Figure 3, which is only for the convenience of describing the present invention and simplifying the description, and It is not to indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, or operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

As shown in Figure 2-5, a kind of rubber elastic joint injection mold comprises upper mold, lower mold and middle mold, wherein, upper mold comprises top plate 1 that is positioned at the top of upper mold (that is, the top as shown in Figure 3), set The upper mandrel fixed plate 2 below the top plate 1 (i.e. the bottom as shown in Figure 3), the upper mandrel 3 fixedly arranged on the upper mandrel fixed plate 2, the upper push plate arranged on the upper mandrel fixed plate 2 below 4, and the stopper 5 that can limit the movement of the upper mandrel fixed plate 2 in the vertical direction, the upper mandrel 3 is arranged side by side, and the upper push plate 4 is provided with a plurality of first passages corresponding to the upper mandrel 3 Holes 6, the diameter of the first through hole 6 is smaller than the outer diameter of the rubber elastic node jacket 20;

As further shown in Figures 2-5, the lower mold includes a bottom plate 7 at the bottom, and a lower core mold 9 fixedly arranged on the bottom plate 7, the lower core mold 9 is a plurality of corresponding upper core molds 3;

As further shown in Figures 2-5, the middle mold includes a lower push plate 8 arranged above the bottom plate 7, and a clamp block 10 corresponding to the adjacent lower mandrel 9 and fixedly arranged on the top of the lower push plate 8, pushing down Corresponding to the lower mandrel 9, the plate 8 is provided with a plurality of second through holes 11 that can be socketed on the upper part of the lower mandrel 9. The diameter of the second through holes 11 is smaller than the outer diameter of the rubber elastic joint sleeve 20, and the lower push plate 8 is along the The two ends in the horizontal direction are provided with a slider 12 that can slide horizontally along the top of the lower push plate 8, and a third through hole 13 that can clamp the outer circumferential surface of the rubber elastic node jacket 20 is formed between the slider 12 and the clamping block 10;

As further shown in Figures 2-5, the upper mandrel 3, the clamping block 10, the slider 12 and the lower mandrel 9 form a cavity capable of accommodating rubber elastic nodes.

The rubber elastic node injection mold of the present invention is provided with an upper push plate 4 and a stopper 5, so that when the rubber elastic node sticks in the upper mandrel 3, multiple rubber elastic nodes can be realized simultaneously by lowering the upper push plate 4 Pull out from the upper mandrel 3, at the same time, by directly applying pressure to the rubber elastic node jacket 20, the rubber elastic node is evenly stressed during the entire process of pulling out; in addition, by setting the push plate 8, it can be used as a rubber elastic node When sticking in the lower mandrel 9, multiple rubber elastic nodes can be released from the lower mandrel 9 at the same time through the rise of the lower push plate 8. The middle rubber elastic nodes are evenly stressed. Therefore, the rubber elastic joint injection mold of the present invention can efficiently remove the vulcanized rubber elastic joint from the mold, and at the same time, meet the requirements for mass production of the rubber elastic joint.

Further as shown in Figure 3, a guide 14 is provided between the top plate 1 and the upper mandrel fixed plate 2 to move the upper mandrel fixed plate 2 in the vertical direction, and the top of the guide 14 is fixedly connected to the top plate 1, limiting The position member 5 is disposed at the bottom of the guide member 14 .

Regarding the structure of the above-mentioned guide member 14, as shown in FIG. 3, the guide member 14 can be a guide rod. At this time, the upper mandrel fixing plate 2 is slidably connected to the guide rod.

In addition, the guide piece 14 can also be a lead screw, at this time, the upper mandrel fixing plate 2 is connected with the guide piece 14 through a lead screw pair.

With regard to the structure of the above-mentioned guide member 14, as shown in FIG.

In addition, the limiting member 5 can also be a block fixedly arranged at the bottom end of the guide rod 14 .

Preferably, the end of the slider 12 near the outside of the mold is fixedly connected with a push-pull rod 15 that can drive the slider 12 to move horizontally, and the end of the push-pull rod 15 near the slider 12 is provided with a locking member 16, and the locking member 16 corresponds to the push-pull rod. 15 is provided with a groove that can be socketed with the push-pull rod 15, and the locking piece 16 is crimped with the slider 12 along the horizontal direction, and the locking piece 16 is detachably connected with the upper push plate 4. In the present invention, by arranging the slider 12, the push-pull rod 15 and the locking member 16, on the one hand, the rubber elastic node can be clamped during the injection vulcanization process to improve the stability of the rubber elastic node; on the other hand, in the process of opening the mold In the process, the transverse restraint force of the rubber elastic node is eliminated by pulling it from the outside, so that the rubber elastic node can be easily taken out, thereby ensuring the efficiency of taking out the rubber elastic node from the mold.

Regarding the installation method of the above-mentioned locking member 16, as shown in FIG. 3 and FIG. 5 , the groove of the locking member 16 is in clearance fit with the push-pull rod 15, and the locking member 16 is fixedly connected with the upper push plate 4 through threads.

As further shown in FIG. 3 and FIG. 5 , the two ends of the upper push plate 4 along the horizontal direction are fixedly provided with an upper hanging plate 17 that can push the upper push plate 4 to move in the vertical direction. The function of setting the upper hanging plate 17 in the present invention is to facilitate the application of downward thrust from the outside of the mold during the process of taking parts from the upper mandrel 3, so as to realize the push-out of the upper push plate 4 to the rubber elastic node.

As further shown in FIG. 3 and FIG. 5 , lower brackets 18 that can push the lower push plate 8 to move vertically are fixedly arranged at both ends of the lower push plate 8 along the horizontal direction. The purpose of setting the lower bracket 18 in the present invention is to facilitate the application of upward thrust from the outside of the mold during the process of taking parts from the lower mandrel 9, so as to realize the push-out of the lower push plate 8 to the rubber elastic node.

As further shown in Figure 3 and Figure 5, the bottom of the lower mandrel 9 can be provided with a fourth through hole, the purpose of which is to allow the gas accumulated inside the mold cavity to be discharged out of the cavity during the injection process, thereby avoiding The rubber 21 of the rubber elastic node has the defect of air pocket.

In order to better understand the above-mentioned technical solution of the present invention, referring to Fig. 3 and Fig. 5, the working process of the rubber elastic joint injection mold of the present invention is as follows:

After the vulcanization of the rubber elastic joint is completed, the lower hot plate of the equipment will drive the entire lower mold part of the mold to move downward to complete the parting along the I-I plane.

If there is a rubber elastic node left in the upper mandrel 3, the upper hanging plate 17 drives the upper push plate 4 to move downward, and at the same time, the upper mandrel fixed plate 2 will move down together under the action of its own gravity, realizing the Type Ⅱ-Ⅱ: After the upper mandrel fixing plate 2 moves to a certain distance, the limit member 5 restricts the upper mandrel fixing plate 2 from continuing to move downward, and at the same time, the upper push plate 4 continues to move downward, thereby The parting along the III-III plane is realized; at this time, the upper push plate 5 exerts a downward thrust on the jacket 20 of the rubber elastic node. Since the skeleton of the rubber elastic node and the rubber 21 have been vulcanized into a whole, the entire rubber The elastic node is separated from the upper mandrel 3 under the action of the thrust, thereby completing the process of taking out the rubber elastic node from the upper mandrel 3 .

If there is a rubber elastic node left in the lower mandrel 9, the lower bracket 18 drives the lower push plate 8 to rise, realizing the splitting along the IV-IV plane. At this time, the lower push plate 8 pushes the outer cover 20 to make the rubber elastic node The lower mandrel 9 comes out; when it is raised to a certain height, the push-pull rod 15 pulls the slider 12 to draw a certain distance to the outside of the mold in the horizontal direction, so that the binding force of the rubber elastic node along the transverse direction is eliminated, and then the rubber elastic node Can be easily removed.

It should be noted that the clamping process of the rubber elastic joint injection mold of the present invention is opposite to the above process, and no further statement is made here. In addition, the rubber elastic joint injection mold of the present invention has successfully produced tens of thousands of rubber elastic joints, with a product pass rate of over 98% and a stable process in the production process.

Claims (9)

1. a kind of caoutchouc elasticity node injection molding, it is characterised in that：Including upper die and lower die and middle mould, wherein, upper mold includes position Top plate (1) at the top of upper mold, the upper core mold fixing plate (2) being set to below top plate (1), is fixedly installed on core mold fixing plate (2) upper core model (3), the upper push plate (4) being set to below core mold fixing plate (2) and can limit core mold fixing plate (2) The locating part (5) vertically moved, upper core model (3) be arranged side by side it is multiple, upper push plate (4) is corresponding to upper core model (3) Multiple first through hole (6) are offered, the diameter of first through hole (6) is less than the outer diameter of caoutchouc elasticity node housing (20)；

Lower die includes the lower core model (9) for being located at the bottom plate (7) of bottom and being fixedly installed on bottom plate (7), and lower core model (9) is Corresponding to the multiple of upper core model (3) setting；

Middle mould include be set to the lower push plate (8) above bottom plate (7) and corresponding between adjacent lower core model (9) and fixation set The fixture block (10) being placed at the top of lower push plate (8) offers on lower push plate (8) corresponding to lower core model (9) and multiple is socketed lower core model (9) second through-hole (11) on top, the diameter of the second through-hole (11) are less than the outer diameter of caoutchouc elasticity node housing (20), lower push plate (8) in the horizontal direction be provided at both ends with the sliding block (12) that can be slided along lower push plate (8) top horizontal, sliding block (12) and fixture block (10) third through-hole (13) of caoutchouc elasticity node housing (20) outer circumference surface can be clamped by being formed between；

Upper core model (3), fixture block (10), sliding block (12) and lower core model (9) are formed with the cavity that can accommodate caoutchouc elasticity node.

2. caoutchouc elasticity node injection molding according to claim 1, it is characterised in that：Top plate (1) is fixed with upper core model The guide part (14) that core mold fixing plate (2) can be made vertically moving, the top of guide part (14) are provided between plate (2) It is fixedly connected with top plate (1), locating part (5) is set to the bottom end of guide part (14).

3. caoutchouc elasticity node injection molding according to claim 2, it is characterised in that：Guide part (14) is guide rod, Upper core mold fixing plate (2) is slidably connected between guide rod.

4. caoutchouc elasticity node injection molding according to claim 3, it is characterised in that：Locating part (5) is led to be socketed on To the baffle ring of bar bottom end.

5. according to the caoutchouc elasticity node injection molding any in claim 1-4, it is characterised in that：Sliding block (12) is close One end of mold exterior is fixedly connected with can be with the push-pull rod (15) that movable slider (12) move horizontally, and push-pull rod (15) is close to sliding block (12) one end is provided with locking member (16), and locking member (16) is provided with corresponding to push-pull rod (15) and can be socketed with push-pull rod (15) Groove, crimped in the horizontal direction between locking member (16) and sliding block (12), locking member (16) detachably connects with upper push plate (4) It connects.

6. caoutchouc elasticity node injection molding according to claim 5, it is characterised in that：The groove of locking member (16) is with pushing away Pull rod (15) clearance fit, locking member (16) are threadably secured with upper push plate (4) and connect.

7. the caoutchouc elasticity node injection molding according to claim 1,2,3,4 or 6, it is characterised in that：Upper push plate (4) edge The both ends of horizontal direction are fixedly installed the upper hanging plate (17) that push plate (4) can be pushed vertically to move.

8. the caoutchouc elasticity node injection molding according to claim 1,2,3,4 or 6, it is characterised in that：Lower push plate (8) edge The both ends of horizontal direction are fixedly installed the bottom bracket (18) that lower push plate (8) can be pushed vertically to move.

9. the caoutchouc elasticity node injection molding according to claim 1,2,3,4 or 6, it is characterised in that：Lower core model (9) bottom Portion is provided with fourth hole.