Rubber node vulcanizing mold

Abstract

A rubber node vulcanization mold comprises a lower mold set and is characterized in that the lower mold set comprises a bottom plate, a lower insert, a lower mold insert block and a lower mold sleeve which are sequentially arranged in a sleeving mode are fixedly arranged on the bottom plate, and the upper portion of the lower insert block is inserted into a fan-shaped opening formed in the center of the lower mold insert block; a middle die set is supported on the lower die set and comprises an upper insert, a middle die insert block and a middle die sleeve which are sequentially sleeved and fixedly connected, and the lower portion of the upper insert block is inserted into a fan-shaped opening formed in the center of the middle die insert block; two core shaft sleeves are symmetrically arranged between the lower die set and the middle die set, the opposite ends of the core shaft sleeves are clamped between the lower insert and the upper insert respectively, and the outer edges of the outer ends of the core shaft sleeves are conical surfaces and are matched with the conical surfaces in the lower die insert and the middle die insert; an upper die sleeve is arranged on the middle die set, and the upper end of the upper insert is sleeved with the upper die sleeve; an upper die set is arranged on the upper die sleeve, the upper die set is formed by fixedly connecting an upper plate and a rubber pressing plug, and the rubber pressing plug and the upper die sleeve are connected in an inserted mode in a clearance fit mode. The die is firm in bonding, and the production efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to a mould, in particular to a rubber node vulcanization mould. 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. The upper mold plate and the lower mold plate are directly molded to form a cavity for placing the mandrel and the outer sleeve of the rubber node. This mold structure relies on the cavity formed by the upper and lower mold plates to position the mandrel after the mold is molded. When the product is vulcanized, there are problems such as easy deformation of the mandrel end face, poor adhesion between the mandrel and the rubber, and mold jamming, resulting in low production efficiency. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a rubber node vulcanization mold which has firm adhesion and can improve production efficiency.

[0005] In order to solve the above problems, the utility model adopts the following technical solutions:

[0006] A rubber node vulcanization mold, comprising a lower mold assembly, wherein the lower mold assembly comprises a bottom plate, on which a lower insert, a lower mold insert and a lower mold sleeve are fixedly arranged in sequence, and the upper part of the lower insert is inserted into a fan-shaped opening arranged in the center of the lower mold insert;

[0007] A middle die set is supported on the lower die set, and the middle die set includes an upper insert, a middle die insert and a middle die sleeve which are fixedly sleeved from the inside to the outside in sequence, and the lower part of the upper insert is inserted into a fan-shaped opening arranged at the center of the middle die insert;

[0008] Two core shaft sleeves are symmetrically arranged between the lower die set and the middle die set, and the opposite ends of the core shaft sleeves are clamped between the lower insert and the upper insert respectively. The outer edges of the outer ends of the core shaft sleeves are conical surfaces and cooperate with the conical surfaces in the lower die insert and the middle die insert to place the core shaft and form a vulcanization cavity with the lower insert and the upper insert;

[0009] An upper die sleeve is provided on the middle die set, and the upper die sleeve is provided on the upper end of the upper insert block for placing the rubber block to be vulcanized;

[0010] An upper die set is arranged on the upper die sleeve, and the upper die set is formed by fixing an upper plate and a rubber plug, and the rubber plug is plugged into the central hole of the upper die sleeve through clearance fitting, and is used for extruding rubber blocks for vulcanization.

[0011] As a further preference, a strip notch is radially provided at the outer end of the core shaft sleeve, and two pressure plates are symmetrically provided in the middle of both sides of the upper side of the lower mold sleeve by screws. The pressure plates are respectively inserted into the strip notches and pressed on the core shaft sleeve to improve the stability of the core shaft sleeve and facilitate demolding.

[0012] As a further preference, a positioning pin is sandwiched between the lower mold insert and the middle mold insert on one side of the vulcanization cavity, and the positioning pin is inserted into the vulcanization cavity to form a positioning hole on the rubber node.

[0013] As a further preference, four lower locating pins are symmetrically provided on the lower mold sleeve near the four corners, and four locating holes are symmetrically provided under the middle mold sleeve. The locating holes and the lower locating pins are plugged in one-to-one to improve the assembly accuracy of the middle mold assembly and the lower mold assembly.

[0014] As a further preference, four upper locating pins are symmetrically provided on the middle mold sleeve near the four corners, the upper ends of the upper locating pins are tapered, and four conical locating holes are symmetrically provided under the upper mold sleeve. The locating holes correspond one-to-one with the upper locating pins and cooperate with each other to improve the assembly accuracy of the upper mold sleeve and the middle mold assembly.

[0015] 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 center hole of the upper die sleeve through a conical surface.

[0016] As a further preference, a plurality of rubber injection holes are provided in a rectangular array on the upper insert for the rubber to flow in.

[0017] The beneficial effects of the utility model are:

[0018] 1. Two core shaft sleeves are symmetrically arranged between the lower die set and the middle die set. 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 die insert and the middle die 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 is firmly bonded to the rubber.

[0019] 2. 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 product can be directly taken out by lifting the mandrel sleeve, which is easy to operate and can improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural sectional view of the utility model.

[0021] Figure 2 yes Figure 1 AA section view.

[0022] Figure 3 It is a three-dimensional structural schematic diagram of a core shaft of a rubber node being installed on a lower die set through a core shaft sleeve.

[0023] In the figure: bottom plate 1, lower insert 2, lower mold insert 3, lower mold sleeve 4, core shaft sleeve 5, strip notch 501, pressure plate 6, middle mold sleeve 7, middle mold insert 8, upper insert 9, glue injection hole 901, glue plug 10, upper mold sleeve 11, upper plate 12, core shaft 13, vulcanization cavity 14, locating pin 15, lower locating pin 16, upper locating pin 17, outer sleeve 18. DETAILED DESCRIPTION

[0024] like Figure 1 to Figure 3 As shown, the utility model relates to a rubber node vulcanization mold, including a lower mold group, which includes a rectangular bottom plate 1, on which a lower insert 2, a lower mold insert block 3 and a lower mold sleeve 4 are fixedly arranged in sequence, the lower insert 2, the lower mold insert block and the lower mold sleeve 4 are nested in sequence from the inside to the outside and the bottom surfaces are flush, the inner holes of the lower mold insert block 3 and the lower mold sleeve 4 are both stepped, the lower insert 2 is fixed in the lower mold insert block 3 by screws and the upper part is inserted into the fan-shaped opening arranged in the center of the lower mold insert block 3; the lower mold insert block 3 is fixed in the lower mold sleeve 4 by screws, and the length and width of the lower mold sleeve 4 are consistent with those of the bottom plate.

[0025] The middle mold group is supported on the lower mold group, and the middle mold group includes an upper insert 9, a middle mold insert 8 and a middle mold sleeve 7 which are fixedly sleeved from the inside to the outside in sequence. The inner holes of the middle mold insert 8 and the middle mold sleeve are both stepped, and the length and width of the middle mold sleeve 7 are consistent with those of the lower mold sleeve 4. The upper insert 9 is fixed in the middle mold insert 8 by screws, and the lower part of the upper insert 9 is inserted into the fan-shaped opening in the center of the middle mold insert 8; the middle mold insert 8 is fixed in the middle mold sleeve 7 by screws. A plurality of injection holes 901 are arranged in a rectangular array on the upper insert 9 for the rubber to flow in.

[0026] Two core shaft sleeves 5 are symmetrically arranged between the lower mold assembly and the middle mold assembly. The opposite ends of the core shaft sleeves 5 are clamped between the lower insert 2 and the upper insert 9 respectively. The outer edge of the outer end of the core shaft sleeve 5 is a cone surface and cooperates with the semi-conical surface in the lower mold insert 3 and the middle mold insert 8. The center hole of the core shaft sleeve 5 is in clearance with the outer edges of the two ends of the core shaft of the rubber node, which is used to place the core shaft 13 and form a vulcanization cavity 14 with the lower insert 2 and the upper insert 9.

[0027] A strip notch 501 is radially provided at the outer end of the mandrel sleeve 5, and the bottom surface of the strip notch 501 is flush with the top surface of the lower mold sleeve 4. Two rectangular pressing plates 6 are symmetrically provided in the middle of both sides of the upper side of the lower mold sleeve 4 through screws. The pressing plates 6 are inserted into the strip notch 501 after passing through the notches provided on the middle mold insert 8 and pressed on the mandrel sleeve 5 to improve the stability of the mandrel sleeve 5 and facilitate demoulding. Two rectangular notches 701 are symmetrically provided in the middle of both sides of the middle mold sleeve 7 corresponding to the pressing plates 6, and the pressing plates 6 and screws are located in the corresponding rectangular notches 701.

[0028] A rectangular upper die sleeve 11 is provided on the middle die set, and the upper die sleeve 11 is sleeved on the upper end of the upper insert 9 for placing the rubber block to be vulcanized; the upper end of the upper insert 9 is truncated cone-shaped and cooperates with the lower end of the center hole of the upper die sleeve 11 through a conical surface.

[0029] An upper die set is provided on the upper die sleeve 11, and the upper die set is formed by an upper plate 12 and a rubber plug 10 fixedly connected up and down by screws. The rubber plug 10 is plugged into the center hole of the upper die sleeve 11 through a clearance fit to extrude the rubber block for vulcanization.

[0030] A positioning pin 15 is sandwiched between the lower mold insert 3 and the middle mold insert 8 at one side of the vulcanization cavity 14 , and the positioning pin 15 is inserted into the vulcanization cavity 14 to form a positioning hole on the rubber node.

[0031] Four lower positioning pins 16 are symmetrically inserted near the four corners on the lower mold sleeve 4, and four positioning holes are symmetrically provided under the middle mold sleeve 7. The positioning holes are plugged and matched with the lower positioning pins 16 in a one-to-one manner to improve the assembly accuracy of the middle mold assembly and the lower mold assembly.

[0032] Four upper locating pins 17 are symmetrically inserted near the four corners on the middle die sleeve 7. The upper ends of the upper locating pins 17 are tapered. Four tapered locating holes are symmetrically provided under the upper die sleeve 11. The locating holes correspond to the upper locating pins 17 one by one and cooperate with each other to improve the assembly accuracy of the upper die sleeve 11 and the middle die set.

[0033] When working, the operation steps are as follows:

[0034] 1. After the mold is assembled, place it on the heating platform of the vulcanizer, open the upper mold group and the middle mold group, insert the two ends of the mandrel 13 of the rubber node into the mandrel sleeve 5, put the mandrel sleeve 5 together with the mandrel 13 into the lower mold insert 3, and insert the rubber node jacket 18 on both sides of the mandrel in the lower mold insert 3, as shown in FIG. Figure 3 As shown;

[0035] 2. Tighten the screws on the pressing plate 6 to press the core shaft sleeve 5 through the pressing plate 6; then put in the positioning pin, close the middle mold assembly and position it through the lower positioning pin to form a vulcanization cavity 14;

[0036] 3. Close the upper mold sleeve 11 and put the rubber block in its center hole. After closing the upper mold assembly, start heating and vulcanization. The rubber block is heated and squeezed by the rubber plug 10 and enters the vulcanization cavity 14 through the injection hole;

[0037] 4. After vulcanization is completed, open the upper die set and the middle die set, loosen the screws on the pressing plate 6, insert the crossbeam into the strip notch 501 at the outer end of the two core shaft sleeves 5, and then take out the product upward.

[0038] 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 rubber node vulcanization mold, comprising a lower mold assembly, characterized in that: The lower die assembly comprises a bottom plate, on which a lower insert, a lower die insert and a lower die sleeve are fixedly arranged in sequence, and the upper portion of the lower insert is inserted into a fan-shaped opening arranged in the center of the lower die insert; A middle die set is supported on the lower die set, and the middle die set includes an upper insert, a middle die insert and a middle die sleeve which are fixedly sleeved from the inside to the outside in sequence, and the lower part of the upper insert is inserted into a fan-shaped opening arranged at the center of the middle die insert; Two core shaft sleeves are symmetrically arranged between the lower die set and the middle die set, and the opposite ends of the core shaft sleeves are clamped between the lower insert and the upper insert respectively. The outer edges of the outer ends of the core shaft sleeves are conical surfaces and cooperate with the conical surfaces in the lower die insert and the middle die insert to place the core shaft and form a vulcanization cavity with the lower insert and the upper insert; An upper die sleeve is provided on the middle die set, and the upper die sleeve is provided on the upper end of the upper insert block for placing the rubber block to be vulcanized; An upper die set is arranged on the upper die sleeve, and the upper die set is formed by fixing an upper plate and a rubber plug, and the rubber plug is plugged into the central hole of the upper die sleeve through clearance fitting, and is used for extruding rubber blocks for vulcanization.

2. A rubber node vulcanization mold according to claim 1, characterized in that: The outer end of the core sleeve is provided with a strip notch in the radial direction, and two pressing plates are symmetrically provided in the middle of both sides of the upper side of the lower mold sleeve 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 and facilitate demoulding.

3. A rubber node vulcanization mold according to claim 1, characterized in that: A positioning pin is sandwiched between the lower mold insert and the middle mold insert at one side of the vulcanization cavity, and the positioning pin is inserted into the vulcanization cavity to form a positioning hole on the rubber node.

4. A rubber node vulcanization mold according to claim 1, characterized in that: Four lower locating pins are symmetrically arranged near the four corners on the lower mold sleeve, and four locating holes are symmetrically arranged under the middle mold sleeve. The locating holes and the lower locating pins are plugged in one by one to improve the assembly accuracy of the middle mold assembly and the lower mold assembly.

5. A rubber node vulcanization mold according to claim 1 or 4, characterized in that: Four upper locating pins are symmetrically arranged near the four corners on the middle die sleeve, and the upper ends of the upper locating pins are tapered. Four tapered locating holes are symmetrically arranged under the upper die sleeve. The locating holes correspond to the upper locating pins one by one and cooperate with each other to improve the assembly accuracy of the upper die sleeve and the middle die set.

6. A rubber node vulcanization mold 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 center hole of the upper die sleeve through a conical surface.

7. A rubber node vulcanization mold according to claim 1 or 6, characterized in that: A plurality of rubber injection holes are arranged in a rectangular array on the upper insert block for the rubber to flow in.

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