A multi-cavity vulcanization mold for rubber nodes

Abstract

A multi-cavity vulcanization mold for rubber nodes, including a bottom plate, characterized in that: a lower mold group is supported on the bottom plate, a middle mold group is supported on the lower mold group, and the middle mold group cooperates with the lower mold group to form multiple molding cavities; an upper mold group is supported on the middle mold group, and a plurality of glue holes are provided on the upper mold group; a top mold group is provided on the upper mold group, and a plurality of glue plugs are provided on the top mold group and plugged with the glue holes; the lower mold group includes a lower insert, a lower mold insert and a lower mold plate, and the upper part of the lower insert is inserted into the fan-shaped opening at the center of the lower mold insert; the middle mold group includes an upper insert, a middle mold insert and a middle mold plate, and the lower part of the upper insert is inserted into the fan-shaped opening at the center of the middle mold insert; and each group of lower inserts and lower mold inserts are one-to-one corresponding to form the molding cavity; a plurality of glue injection holes are provided in a rectangular array on the upper insert; and two core shaft sleeves are symmetrically provided in each molding cavity. The beneficial effects are: it can improve production efficiency, make full use of existing equipment resources, and save mold costs.

Description

Technical Field

[0001] The utility model relates to a mould, in particular to a multi-cavity vulcanization mould for rubber nodes. Background Art

[0002] The rubber node is formed by the core shaft and the outer sleeve through rubber vulcanization. It is an important connecting element between the axle box swing arm and the frame of the rail vehicle. It is widely used in urban rail vehicles such as subways and light rails, and high-speed trains. The rubber node has important functions such as transmitting the longitudinal force of traction or braking, ensuring the stable operation of the train and having good guiding capabilities. Therefore, the product interface size requirements are relatively strict and the rubber bonding performance requirements are relatively high.

[0003] The existing rubber node vulcanization mold usually includes an upper mold plate and a lower mold plate, which are directly combined to form a cavity for placing the core shaft and jacket of the rubber node. The existing mold has the following problems:

[0004] 1. After the mold is closed, the core shaft is positioned by the cavity formed by the upper and lower mold plates. When the product is vulcanized, there are problems such as easy deformation of the core shaft end face, poor adhesion between the core shaft and the rubber, and mold jamming.

[0005] 2. During vulcanization molding, a cavity is formed, and only one product can be processed at a time, resulting in low production efficiency. At the same time, most of the existing production equipment is a 400T or 600T vulcanizer, which uses a single-cavity mold for rubber node vulcanization, resulting in a waste of production resources.

[0006] 3. The existing single-cavity mold can only produce one product at a time. When producing other rubber nodes, a new mold needs to be prepared, resulting in cost waste. Utility Model Content

[0007] The technical problem to be solved by the utility model is to provide a multi-cavity vulcanization mold for a rubber node, which can improve production efficiency, make full use of existing equipment resources, and save mold costs.

[0008] In order to solve the above problems, the utility model adopts the following technical solutions:

[0009] A multi-cavity vulcanization mold for a rubber node comprises a bottom plate, and the special features thereof are: a lower mold group is supported on the bottom plate, a middle mold group is supported on the lower mold group, and the middle mold group cooperates with the lower mold group to form a plurality of molding cavities for placing the mandrel and the outer sleeve of the rubber node; an upper mold group is supported on the middle mold group, and a plurality of glue holes are provided on the upper mold group, and the glue holes correspond to the molding cavities one by one, and are used to place the rubber blocks to be vulcanized; a top mold group is provided on the upper mold group, and a plurality of glue pressing plugs are provided on the top mold group and are plugged with the glue holes through clearance, and are used to extrude the rubber blocks for vulcanization;

[0010] The lower die assembly comprises a lower insert, a lower die insert and a lower die plate which are sequentially sleeved and fixed, a plurality of rectangular stepped first mounting holes are arranged on the lower die plate, the lower insert and the lower die insert are multiple groups and are respectively fixed in each first mounting hole, and the upper part of the lower insert is inserted into a fan-shaped opening arranged in the center of the lower die insert;

[0011] The middle mold assembly comprises an upper insert, a middle mold insert and a middle mold plate which are sequentially sleeved and fixed from the inside to the outside, and the lower part of the upper insert is inserted into a fan-shaped opening arranged at the center of the middle mold insert; a plurality of rectangular stepped second mounting holes are arranged on the middle mold plate, and the upper insert and the middle mold insert are arranged in a plurality of groups and are respectively fixed in each second mounting hole, and correspond one by one to each group of lower insert and lower mold insert, so as to form the molding cavity; a plurality of injection holes are arranged in a rectangular array on the upper insert for the rubber to flow in;

[0012] Two core shaft sleeves are symmetrically arranged in each molding cavity. The opposite ends of the core shaft sleeves are respectively clamped between the two ends of the lower insert and the upper insert. The outer edge of the outer end of the core shaft sleeve is a conical surface and cooperates with the conical surfaces in the lower mold insert and the middle mold insert to support the core shaft placed in the molding cavity.

[0013] As a further preference, upper cross beams are fixed on the front and rear sides of the upper template respectively for connecting to the upper vertical column of the vulcanizing machine.

[0014] As a further preferred embodiment, lower cross beams are respectively fixed on the front and rear sides of the middle template for connecting the lower vertical row of the vulcanizer.

[0015] As a further preference, the top mold assembly includes a top plate and a rubber plug, and the rubber plug is fixed under the top plate by screws.

[0016] As a further preference, a strip notch is radially provided at the outer end of the core sleeve, and two pressure plates are symmetrically provided on the lower template in the middle of both ends of each molding cavity through screws. The pressure plates are respectively inserted into the strip notch and pressed on the core sleeve to improve the stability of the core sleeve.

[0017] As a further preference, two support plates are symmetrically fixed on both sides of the lower template for connecting the lower mold assembly and the vulcanizer support plate.

[0018] As a further preference, two push rods are symmetrically provided on both sides of each molding cavity on the lower mold insert, the upper ends of the push rods correspond to the outer ends of the core shaft sleeve, and the lower ends of the push rods pass through the lower mold insert and are inserted into the corresponding through holes on the bottom plate to facilitate the withdrawal of the vulcanized rubber node.

[0019] As a further preference, a positioning pin is sandwiched between the lower mold insert and the middle mold insert at one side of each molding cavity, and the positioning pin is inserted into the corresponding molding cavity to form a positioning hole on the rubber node.

[0020] As a further preference, four limit pins are symmetrically provided on the bottom plate near the four corners, and four positioning holes are symmetrically provided under the lower template. The positioning holes and the limit pins are plugged in one-to-one to improve the assembly accuracy of the bottom plate and the lower mold assembly.

[0021] As a further preference, the upper end of the upper insert is in the shape of a truncated cone, and cooperates with the lower end of the glue placement hole on the upper template through a conical surface.

[0022] The beneficial effects of the utility model are:

[0023] 1. Since the lower die set and the middle die set are supported in sequence on the bottom plate, the middle die set and the lower die set cooperate to form multiple molding cavities for placing the mandrel and the outer sleeve of the rubber node; therefore, multiple rubber nodes can be vulcanized and molded at one time, which can double the production efficiency and make full use of the existing vulcanizing machine equipment resources.

[0024] 2. Since two core shaft sleeves are symmetrically arranged in each molding cavity, the outer edge of the outer end of the core shaft sleeve is a conical surface and cooperates with the conical surfaces in the lower mold insert and the middle mold insert. Therefore, after the core shaft is placed through the core shaft sleeve, the circumferential positioning can be achieved and the axial positioning of the core shaft can be achieved at the same time, thereby avoiding deformation of the end face of the core shaft during vulcanization and ensuring that the core shaft and the rubber are firmly bonded.

[0025] 3. Since the outer edge of the outer end of the mandrel sleeve is a conical surface and cooperates with the conical surfaces in the lower mold insert and the middle mold insert, the mandrel is placed through the mandrel sleeve and forms a vulcanization cavity with the lower insert and the upper insert. After the vulcanization is completed and the mold is opened, the mandrel sleeve is ejected by the ejector pin to directly take out the product, which is easy to operate and can improve production efficiency.

[0026] 4. Since the multiple groups of upper inserts and middle mold inserts of the middle mold group correspond one to one with the multiple groups of lower inserts and lower mold inserts of the lower mold group and form multiple molding cavities, different types of rubber nodes can be produced by replacing different inserts and inserts, which greatly saves mold costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural sectional view of the utility model.

[0028] Figure 2 yes Figure 1 AA section view.

[0029] Figure 3 yes Figure 1 Top view of the .

[0030] Figure 4 It is a three-dimensional structural diagram of the utility model.

[0031] Figure 5 yes Figure 4 The schematic diagram of the structure in which the top module, upper template and middle module are removed.

[0032] In the figure: bottom plate 1, push rod 2, lower insert 3, core shaft sleeve 4, strip notch 401, lower mold insert 5, lower mold plate 6, support plate 7, pressure plate 8, screw 9, lower cross beam 10, middle mold plate 11, middle mold insert 12, upper insert 13, glue injection hole 1301, upper mold plate 14, glue plug 15, upper cross beam 16, top plate 17, molding cavity 18, positioning pin 19, core shaft 20, outer sleeve 21, limit pin 22. DETAILED DESCRIPTION

[0033] like Figure 1 to Figure 5 As shown, the utility model relates to a multi-cavity vulcanization mold for a rubber node, comprising a rectangular bottom plate 1, a lower mold group is supported on the bottom plate 1, a middle mold group is supported on the lower mold group, the middle mold group cooperates with the lower mold group to form a plurality of molding cavities 18, and this embodiment takes four molding cavities as an example, which are used to place the core shaft and the outer sleeve of the rubber node; an upper mold plate 14 is supported on the middle mold group, and a plurality of glue holes are provided on the upper mold plate 14, which correspond one by one to the molding cavities 18, and are used to place the rubber blocks to be vulcanized.

[0034] The lower mold assembly includes a lower insert 3, a lower mold insert 5 and a lower mold plate 6 which are sequentially sleeved and fixed. A plurality of rectangular stepped first mounting holes are provided on the lower mold plate 6. In this embodiment, four first mounting holes are taken as an example. The lower insert 3 and the lower mold insert 5 are four groups and are respectively fixed in each first mounting hole. The upper part of the lower insert 3 is inserted into the fan-shaped opening provided in the center of the lower mold insert 5; the lower insert 3 is fixed in the lower mold insert 5 by screws and the upper part is inserted into the fan-shaped opening provided in the center of the lower mold insert 5; the lower mold insert 5 is fixed in the corresponding first mounting hole by screws.

[0035] The middle mold assembly includes an upper insert 13, a middle mold insert 12 and a middle mold plate 11 which are sequentially sleeved and fixed from the inside to the outside. A plurality of rectangular stepped second mounting holes are provided on the middle mold plate 11, and the second mounting holes correspond one-to-one to the first mounting holes. The upper insert 13 and the middle mold insert 12 are multiple groups and are respectively fixed in each second mounting hole, and correspond one-to-one to each group of lower inserts 3 and lower mold inserts, so as to form the molding cavity 18; a plurality of glue injection holes 1301 are provided in a rectangular array on the upper insert 13 for the flow of rubber; the upper insert 13 is fixed in the middle mold insert 12 by screws, and the lower part of the upper insert 13 is inserted into the fan-shaped opening provided in the center of the middle mold insert 12; the middle mold insert 12 is fixed in the corresponding second mounting hole by screws.

[0036] Two core shaft sleeves 4 are symmetrically arranged in each molding cavity 18. The opposite ends of the core shaft sleeves 4 are respectively clamped between the two ends of the lower insert 3 and the upper insert 13. The outer edge of the outer end of the core shaft sleeve 4 is a conical surface and cooperates with the semi-conical surface in the lower mold insert 5 and the middle mold insert 12. The center hole of the core shaft sleeve 4 is in clearance with the outer edges of the two ends of the core shaft of the rubber node, so as to support the core shaft 20 placed in the molding cavity 18 and form a vulcanization cavity with the lower insert 3 and the upper insert 13.

[0037] A strip notch 401 is radially provided at the outer end of the mandrel sleeve 4, and the bottom surface of the strip notch 401 is flush with the top surface of the lower mold plate 6. Two rectangular pressing plates 8 are symmetrically provided on the lower mold plate 6 at the middle of each end of each molding cavity 18 through screws 9. The two corresponding pressing plates 8 in the middle of the lower mold plate 6 are connected as an integral structure. The pressing plates 8 are respectively inserted into the strip notch 401 through the notches provided on the middle mold insert 12 and pressed on the mandrel sleeve 4 to improve the stability of the mandrel sleeve 4. Rectangular notches are respectively provided at the two sides and the middle of the middle mold plate 11 corresponding to the pressing plates 8, and the pressing plates 8 and the pressing plates 8 are located in the corresponding rectangular notches.

[0038] The glue holes are respectively sleeved on the upper ends of the corresponding upper inserts. The upper ends of the upper inserts 13 are truncated cone-shaped and are matched with the lower ends of the corresponding glue holes on the upper template 14 through conical surfaces.

[0039] A top mold assembly is provided on the upper mold plate 14, and the top mold assembly includes a top plate 17 and a plurality of rubber plugs 15 fixed under the top plate 17 by screws. The rubber plugs 15 correspond to the rubber holes one by one and are plugged in through clearance fit, so as to be connected to the hot plate on the vulcanizer and extrude the rubber block for vulcanization.

[0040] A positioning pin 19 is sandwiched between the lower mold insert 5 and the middle mold insert 12 at one side of each molding cavity 18 , and the positioning pins 19 are respectively inserted into the corresponding molding cavities 18 to form positioning holes on the rubber nodes.

[0041] Two support plates 7 are symmetrically fixed on the left and right sides of the lower template 6 by screws, which are used to connect the lower mold assembly and the vulcanizer support plate. The lower crossbeam 10 is fixed on the front and rear sides of the middle template 11 by screws, which is used to connect the lower vertical row of the vulcanizer. The upper crossbeam 16 is fixed on the front and rear sides of the upper template 14 by screws, which is used to connect the upper vertical row of the vulcanizer.

[0042] On the lower mold insert, two ejector rods 2 are symmetrically inserted through clearance fit on both sides of each molding cavity 18, and the upper ends of the ejector rods 2 correspond to the outer ends of the core shaft sleeve one by one. The lower ends of the ejector rods 2 pass through the lower mold insert 5 and are inserted into the corresponding through holes on the bottom plate 1 to facilitate the withdrawal of the vulcanized rubber node.

[0043] Four limit pins 22 are symmetrically arranged near the four corners on the bottom plate 1. The upper ends of the limit pins 22 are tapered. Four positioning holes are symmetrically arranged under the lower template 6. The positioning holes and the limit pins 22 are plugged in one by one to improve the assembly accuracy of the bottom plate 1 and the lower mold assembly.

[0044] When working, the operation steps are as follows:

[0045] 1. Fix the bottom plate 1 on the lower hot plate of the vulcanizer by bolts, plug the lower die set with the vulcanizer support plate through the support plates 7 on both sides; connect the middle die set to the lower vertical row of the vulcanizer through the lower cross beams 10 on the front and rear sides; connect the upper die set 14 to the upper vertical row of the vulcanizer through the upper cross beams 16 on the front and rear sides; and fix the top die set to the upper hot plate of the vulcanizer through the top plate 17.

[0046] 2. After the mold is assembled, open the mold, insert the two ends of the mandrel of the rubber node into the mandrel sleeve 4, put the mandrel sleeve 4 together with the mandrel 20 into the lower mold insert 5, and insert the outer sleeve 21 of the rubber node on both sides of the mandrel in the lower mold insert 5;

[0047] 2. Tighten the screws 9 on the pressing plate 8 to press the core shaft sleeve 4 through the pressing plate 8; then put in the positioning pin, close the middle mold assembly and position it through the limit pin to form a vulcanization cavity 14;

[0048] 3. Close the upper mold plate 14 and put the rubber block in its glue hole. Close the top mold assembly and start heating and vulcanization. The rubber block is heated and squeezed by the rubber plug 15 and enters the vulcanization cavity 14 through the glue injection hole 1301.

[0049] 4. After vulcanization is completed, open the upper mold plate 14 and the middle mold group, loosen the screws on the pressure plate 8 and move the pressure plate away, lift the lower mold group through the vulcanizer support plate, and then move the lower hot plate of the vulcanizer horizontally to drive the bottom plate 1 to move horizontally away from the lower mold group; finally, control the vulcanizer clapper located under the lower mold group to rise, push up the push rod 2, and push up the core shaft sleeve through the push rod 2 to take out the product.

[0050] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A multi-cavity vulcanization mold for a rubber node, comprising a bottom plate, characterized in that: A lower die set is supported on the bottom plate, and a middle die set is supported on the lower die set. The middle die set cooperates with the lower die set to form a plurality of molding cavities for placing the core shaft and the outer sleeve of the rubber node; an upper die set is supported on the middle die set, and a plurality of glue holes are provided on the upper die set. The glue holes correspond to the molding cavities one by one, and are used to place the rubber blocks to be vulcanized; a top die set is provided on the upper die set, and a plurality of rubber pressing plugs are provided on the top die set and are plugged with the glue holes through clearances, so as to extrude the rubber blocks for vulcanization; The lower die assembly comprises a lower insert, a lower die insert and a lower die plate which are sequentially sleeved and fixed, a plurality of rectangular stepped first mounting holes are arranged on the lower die plate, the lower insert and the lower die insert are multiple groups and are respectively fixed in each first mounting hole, and the upper part of the lower insert is inserted into a fan-shaped opening arranged in the center of the lower die insert; The middle mold assembly comprises an upper insert, a middle mold insert and a middle mold plate which are sequentially sleeved and fixed from the inside to the outside, and the lower part of the upper insert is inserted into a fan-shaped opening arranged at the center of the middle mold insert; a plurality of rectangular stepped second mounting holes are arranged on the middle mold plate, and the upper insert and the middle mold insert are arranged in a plurality of groups and are respectively fixed in each second mounting hole, and correspond one by one to each group of lower insert and lower mold insert, so as to form the molding cavity; a plurality of injection holes are arranged in a rectangular array on the upper insert for the rubber to flow in; Two core shaft sleeves are symmetrically arranged in each molding cavity. The opposite ends of the core shaft sleeves are respectively clamped between the two ends of the lower insert and the upper insert. The outer edge of the outer end of the core shaft sleeve is a conical surface and cooperates with the conical surfaces in the lower mold insert and the middle mold insert to support the core shaft placed in the molding cavity.

2. A multi-cavity vulcanization mold for rubber nodes according to claim 1, characterized in that: Upper cross beams are fixed on the front and rear sides of the upper template respectively for connecting the upper vertical rails of the vulcanizing machine.

3. A multi-cavity vulcanization mold for rubber nodes according to claim 1 or 2, characterized in that: Lower cross beams are fixed on the front and rear sides of the middle template respectively for connecting the lower vertical row of the vulcanizing machine.

4. The multi-cavity vulcanization mold for rubber nodes according to claim 1 is characterized in that: The top mold assembly includes a top plate and a rubber plug, and the rubber plug is fixed under the top plate by screws.

5. A multi-cavity vulcanization mold for rubber nodes according to claim 1, characterized in that: The outer end of the core sleeve is provided with a strip notch in the radial direction. Two pressing plates are symmetrically provided on the lower template at the middle of both ends of each molding cavity through screws. The pressing plates are respectively inserted into the strip notches and pressed on the core sleeve to improve the stability of the core sleeve.

6. The multi-cavity vulcanization mold for rubber nodes according to claim 3 is characterized by: Two supporting plates are symmetrically fixed on both sides of the lower mold plate, which are used to connect the lower mold assembly and the vulcanizer support plate.

7. A multi-cavity vulcanization mold for rubber nodes according to claim 1 or 6, characterized in that: Two ejector pins are symmetrically arranged on both sides of each molding cavity on the lower mold insert, the upper ends of the ejector pins correspond to the outer ends of the core shaft sleeves, and the lower ends of the ejector pins pass through the lower mold insert and are inserted into corresponding through holes on the bottom plate to facilitate the withdrawal of the vulcanized rubber node.

8. The multi-cavity vulcanization mold for rubber nodes according to claim 7 is characterized in that: A positioning pin is sandwiched between the lower mold insert and the middle mold insert at one side of each molding cavity, and the positioning pin is inserted into the corresponding molding cavity to form a positioning hole on the rubber node.

9. The multi-cavity vulcanization mold for rubber nodes according to claim 1, characterized in that: Four limit pins are symmetrically arranged near the four corners on the bottom plate, and four positioning holes are symmetrically arranged under the lower template. The positioning holes and the limit pins are plugged in one by one to improve the assembly accuracy of the bottom plate and the lower mold assembly.

10. The multi-cavity vulcanization mold for rubber nodes according to claim 1, characterized in that: The upper end of the upper insert is in the shape of a truncated cone and is matched with the lower end of the glue placement hole on the upper template through a conical surface.

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