Rubber mold with sprue gate

Abstract

The utility model belongs to the technical field of rubber product forming dies, and particularly relates to a rubber die with a sprue gate, which comprises an upper die, a middle die and a lower die, the middle die is arranged above the lower die, a die cavity capable of containing a workpiece is enclosed by the middle die and the lower die, the workpiece is arranged in the die cavity, and the sprue gate is arranged on the upper die. The middle mold is provided with a plurality of sprue gates communicated to the mold cavity, the upper mold is arranged above the middle mold, the upper mold is provided with a plurality of extrusion columns which are used for extruding sizing materials in the sprue gates and sealing the sprue gates, and the extrusion columns correspond to the sprue gates one to one. According to the utility model, the sprue gate is arranged on the die, so that the problem that rubber in a closed die is difficult to control in a flat plate vulcanization process is solved, the sprue gate can effectively control the flow and the gathering position of the rubber, the situation that excessive rubber is gathered and a workpiece is extruded and damaged is avoided, and the rubber vulcanization quality of the surface of the workpiece is effectively ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of rubber product molding molds, and particularly relates to a rubber mold with a pouring port. Background Art

[0002] Vulcanization is the final step in rubber processing. After vulcanization, rubber products with stable shapes and practical value are obtained. Vulcanization of rubber occurs through a chemical reaction between the raw rubber and the vulcanizing agent under pressure, heat, or radiation. This chemical reaction causes linear macromolecules to crosslink into three-dimensional network macromolecules, fundamentally changing their physical, mechanical, and other properties. During the rubber vulcanization process, compression molding is often used to achieve the desired product shape. However, conventional flat-plate compression molding processes struggle to meet the requirements for processing some specialized workpieces. For example, marine sensors require a layer of vulcanized rubber to form on the workpiece surface. The rubber vulcanization process requires precise machining of the workpiece. However, due to the ceramic spherical structure on the top of the workpiece, compression molding is difficult to control the rubber accumulation within the mold. Under pressure, the accumulated rubber can easily damage the ceramic spheres, causing damage to the workpiece. Summary of the Invention

[0003] In view of the defects of the above-mentioned prior art, the purpose of the present invention is to provide a rubber mold with a pouring gate, which is used for flat vulcanization of rubber on the surface of fragile workpieces, and the injection position and amount of the rubber can be controlled by injecting the rubber to avoid damage to the workpiece.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a rubber mold with a pouring gate, comprising an upper mold, a middle mold and a lower mold, the middle mold being arranged above the lower mold, the middle mold and the lower mold enclosing a mold cavity that can contain a workpiece, the workpiece being placed in the mold cavity, the middle mold being provided with a plurality of pouring gates connected to the mold cavity, the upper mold being arranged above the middle mold, the upper mold being provided with a plurality of extrusion columns for extruding the rubber material in the pouring gate and closing the pouring gate, the extrusion columns corresponding to the pouring gates one-to-one.

[0005] Furthermore, the middle mold and the lower mold are positioned and installed by correspondingly arranging positioning columns and positioning holes.

[0006] Furthermore, the middle mold and the lower mold are provided with corresponding positioning holes, and the middle mold and the lower mold are positioned and assembled by assembling the positioning columns into the positioning holes. The positioning columns are designed as a stepped structure with one end being large and the other end being small.

[0007] Furthermore, the upper mold, the middle mold and the lower mold are all square structures, and there are two positioning holes, which are respectively arranged at the two ends of the square structures of the middle mold and the lower mold along the diagonal direction.

[0008] Furthermore, the mold cavity includes a middle mold cavity formed on the lower surface of the middle mold and a lower mold cavity formed on the upper surface of the lower mold. The pouring gate passes through the middle mold from top to bottom. A horizontal guide groove is provided on the lower surface of the middle mold. The outlet of the pouring gate is connected to the guide groove and communicates with the mold cavity through the guide groove.

[0009] Furthermore, the pouring gate is vertically arranged in the middle mold, and the pouring gate forms a connected feed trough and injection trough from top to bottom. The diameter of the feed trough is larger than the diameter of the injection trough. The rubber is buffered in the feed trough, and a conical injection head is set at the bottom of the injection trough.

[0010] Furthermore, a plurality of extrusion columns are provided on the lower surface of the upper mold, and the extrusion columns are integrally provided with the upper mold, and the extrusion columns are assembled correspondingly to the feed trough of the pouring gate.

[0011] Furthermore, a plurality of demoulding grooves are provided at the edges of the upper surface and the lower surface of the middle mold.

[0012] Furthermore, a fixed handle is connected to the workpiece, and the middle mold and the lower mold form a fixed cavity matching the fixed handle. The workpiece is suspended in the mold cavity through the fixed handle and the fixed cavity, and there is space between the outer surface of the workpiece and the inner surface of the mold cavity for the rubber to flow and vulcanize.

[0013] Furthermore, the workpiece is a ceramic ball with a connecting rod, the fixing handle is provided at the end of the connecting rod, and three pouring gates are provided on the middle mold, one of which is connected to the mold cavity located at the top of the ceramic ball, and the other two pouring gates are respectively connected to the mold cavities located on both sides of the radial direction of the connecting rod, and the rubber layer is covered on the surface of the connecting rod and the ceramic ball of the workpiece through the three pouring gates.

[0014] The beneficial effects of the present invention are as follows: the present invention overcomes the problem of difficulty in controlling the rubber material in a closed mold in a flat-plate vulcanization process by arranging a pouring gate on the mold. The pouring gate can effectively control the flow rate and aggregation position of the rubber material, avoid excessive rubber material aggregation, extrusion and damage to the workpiece, and effectively ensure the rubber vulcanization quality of the workpiece surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the mold assembly of the utility model;

[0016] Figure 2 Schematic diagram of the middle mold structure;

[0017] In the figure: 1. Upper mold, 2. Middle mold, 3. Lower mold, 4. Mold cavity, 5. Pouring gate, 5.1. Feed trough, 5.2. Injection trough, 6. Workpiece, 7. Positioning column, 8. Positioning hole, 9. Guide groove, 10. Demolding groove, 11. Fixing cavity. DETAILED DESCRIPTION

[0018] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] See attached Figure 1-2 A rubber mold with a pouring gate is used for vulcanizing the surface rubber of a ceramic marine sensor core rod workpiece. The mold includes an upper mold 1, a middle mold 2, and a lower mold 3. The middle mold 2 is arranged above the lower mold 3. The middle mold 2 and the lower mold 3 enclose a mold cavity 4 that can contain the workpiece. The workpiece is placed in the mold cavity 4. The workpiece is a ceramic ball with a connecting rod. The fixing handle is provided at the end of the connecting rod. The middle mold and the lower mold form a fixed cavity that matches the fixing handle. The workpiece is suspended in the mold cavity by the fixing handle and the fixed cavity. There is a space between the outer surface of the workpiece and the inner surface of the mold cavity for the rubber material to flow and vulcanize. The middle mold is provided with three pouring gates 5 connected to the mold cavity. One pouring gate is connected to the mold cavity at the top of the ceramic ball, and the other two pouring gates are connected to the mold cavities on both sides of the connecting rod. The three pouring gates are used to cover the surface of the connecting rod and ceramic ball of the workpiece with a rubber layer. The upper mold 1 is arranged above the middle mold 2. The upper mold 1 is provided with three extrusion columns for extruding the rubber material in the pouring gate 5 and closing the pouring gate. The extrusion columns correspond to the pouring gates one by one.

[0020] Based on the above technical solution, when pouring the rubber, the weight of the rubber can be controlled to ensure that the rubber is evenly covered on the workpiece.

[0021] Furthermore, the upper mold 1, the middle mold 2 and the lower mold 3 are all rectangular structures, and two positioning holes 8 are provided at both ends of the middle mold 2 and the lower mold 3 along the diagonal direction. The positioning column 7 is integrally arranged with the lower mold 3, and the lower surface of the middle mold 2 is provided with two positioning holes 8 that cooperate with the two positioning columns 7. The positioning columns 7 pass through the positioning holes to realize the positioning installation of the middle mold 2 and the lower mold 3. The positioning column 7 can be designed as a stepped structure with one end large and the other end small. The large head end is assembled into a template in the middle mold 2 or the lower mold 3, and the small head end is assembled into the other template to prevent the positioning column 7 from falling off and facilitate installation and limiting.

[0022] It should be noted that, in other embodiments, the middle mold 2 and the lower mold 3 may adopt other positioning forms. For example, two positioning columns 7 are provided at both ends of the upper surface of the lower mold 3 along the diagonal direction. The positioning columns 7 are integrally provided with the lower mold 3. The lower surface of the middle mold 2 is provided with two positioning holes 8 that cooperate with the two positioning columns 7. The middle mold 2 and the lower mold are positioned and installed by correspondingly setting the positioning columns 7 and the positioning holes 8.

[0023] Furthermore, the mold cavity 4 includes a middle mold cavity formed on the lower surface of the middle mold 2 and a lower mold cavity formed on the upper surface of the lower mold 3. The pouring gate 5 passes through the middle mold 2 from top to bottom. The lower surface of the middle mold 2 is provided with a horizontal guide groove 9. The outlet of the pouring gate 5 is connected to the guide groove 9 and is connected to the mold cavity 4 through the guide groove.

[0024] Furthermore, the pouring gate 5 is vertically arranged in the middle mold, and the pouring gate forms a connected feed trough 5.1 and an injection trough 5.2 from top to bottom. The diameter of the feed trough 5.1 is larger than the diameter of the injection trough 5.2. The rubber is buffered in the feed trough 5.1, and a conical injection head is set at the bottom of the injection trough 5.2.

[0025] Furthermore, a plurality of extrusion columns are provided on the lower surface of the upper mold 1 , and the extrusion columns are integrally provided with the upper mold, and the extrusion columns are assembled corresponding to the feed trough 5 . 2 of the pouring gate.

[0026] Furthermore, the upper and lower surfaces of the middle mold 2 are provided with demoulding grooves 10 at the four corners, so that there is a gap at the edge between the middle mold 2 and the upper mold 1 and the lower mold 3, which facilitates the separation of the middle mold 2 from the upper mold 1 and the lower mold 3.

[0027] Based on the above technical solution, it should be noted that this embodiment provides a workpiece style and a mold structure that matches the workpiece, but the mold and flat-plate molding method of the present invention are not limited to the processing of the workpiece of this embodiment, but can also be used for the surface rubber molding process of other vulnerable parts. If the workpiece itself has a fixed handle that does not need to be covered with rubber, the workpiece is suspended in the mold cavity by the fixed handle. If the workpiece itself does not have a fixed handle, the workpiece is suspended in the mold cavity by a detachable external fixed handle.

[0028] Parts not described in detail in the present invention are common knowledge in the art.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0031] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0032] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0034] The above examples are merely preferred embodiments of the present invention. Obviously, the present invention is not limited to the above examples and is subject to numerous variations. Any variations that can be directly derived or conceived by a person skilled in the art from the disclosure of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A rubber mold with a pouring gate, characterized in that: It includes an upper mold, a middle mold and a lower mold. The middle mold is arranged above the lower mold. The middle mold and the lower mold enclose a mold cavity that can contain a workpiece. The workpiece is placed in the mold cavity. The middle mold is provided with a plurality of pouring gates connected to the mold cavity. The upper mold is arranged above the middle mold. The upper mold is provided with a plurality of extrusion columns for extruding the rubber material in the pouring gate and closing the pouring gate. The extrusion columns correspond to the pouring gates one by one.

2. The rubber mold with a pouring gate according to claim 1, characterized in that: The middle mold and the lower mold are positioned and installed by correspondingly arranging positioning columns and positioning holes.

3. The rubber mold with a pouring gate according to claim 2, characterized in that: The middle mold and the lower mold are provided with corresponding positioning holes, and the middle mold and the lower mold are positioned and assembled by assembling the positioning columns into the positioning holes. The positioning columns are designed as a stepped structure with one end larger and the other end smaller.

4. The rubber mold with a pouring gate according to claim 2, characterized in that: The upper mold, the middle mold and the lower mold are all square structures, and there are two positioning holes, which are respectively arranged at the two ends of the square structures of the middle mold and the lower mold along the diagonal direction.

5. The rubber mold with a pouring gate according to claim 1, characterized in that: The mold cavity includes a middle mold cavity formed on the lower surface of the middle mold and a lower mold cavity formed on the upper surface of the lower mold. The pouring gate passes through the middle mold from top to bottom. A horizontal guide groove is provided on the lower surface of the middle mold. The outlet of the pouring gate is connected to the guide groove and communicates with the mold cavity through the guide groove.

6. The rubber mold with a pouring gate according to claim 1, characterized in that: The pouring gate is vertically arranged in the middle mold, and the pouring gate forms a connected feed trough and injection trough in sequence from top to bottom. The diameter of the feed trough is larger than the diameter of the injection trough. The rubber is buffered in the feed trough, and a conical injection head is set at the bottom of the injection trough.

7. The rubber mold with a pouring gate according to claim 6, characterized in that: The lower surface of the upper mold is provided with a plurality of extrusion columns, which are integrally provided with the upper mold, and the extrusion columns are assembled correspondingly to the feed trough of the pouring port.

8. The rubber mold with a pouring gate according to claim 1, characterized in that: The upper surface and the lower surface of the middle mold are provided with a plurality of demoulding grooves at the edges.

9. A rubber mold with a pouring gate according to any one of claims 1 to 8, characterized in that: The workpiece is connected to a fixed handle, and the middle mold and the lower mold form a fixed cavity matching the fixed handle. The workpiece is suspended in the mold cavity through the fixed handle and the fixed cavity, and there is space between the outer surface of the workpiece and the inner surface of the mold cavity for rubber to flow and vulcanize.

10. The rubber mold with a pouring gate according to claim 9, characterized in that: The workpiece is a ceramic ball with a connecting rod, the fixing handle is provided at the end of the connecting rod, and three pouring gates are provided on the middle mold, one of which is connected to the mold cavity located at the top of the ceramic ball, and the other two pouring gates are respectively connected to the mold cavities located on both sides of the radial direction of the connecting rod. The rubber layer is covered on the surface of the connecting rod and the ceramic ball of the workpiece through the three pouring gates.

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