A plane extrusion molding method for materials and plane extrusion molding tooling

Abstract

The present invention relates to a planar extrusion molding method of a material and a planar extrusion molding tool. The method comprises: adjusting the positions of a positioning block, a limiting block, a first molding block and a second molding block to form an extrusion space; placing the material in the extrusion space, driving the first molding block and / or the second molding block to extrude the material to a first molding state, the distance between the first molding block and the second molding block is L1; driving the first molding block and / or the second molding block to move away from the material to a second molding state, the distance between the first molding block and the second molding block is L2, the second molding state includes the expansion coefficient K1 of the material in the first molding state being greater than the expansion coefficient K1 of the material in the first molding state being driven to move away from the limiting block to the material to the third molding state; driving the first molding block and the second molding block to move away from the material to a fourth molding state, and removing the material in the fourth molding state. This solves the problem of burrs caused by stress inside the square block after extrusion molding.

Description

Technical Field

[0001] The invention relates to the field of manufacturing technology, in particular to a planar extrusion molding method of a material and a planar extrusion molding tool. Background Art

[0002] In industrial manufacturing, it is common to extrude powder or mud into blocks, for example, tantalum powder is processed into tantalum blocks, graphite is processed into blocks, etc. By using extrusion processing, even billets with low plasticity can be extruded into shape.

[0003] Among these, the most common is extrusion into square blocks, which means that extrusion needs to be performed from four sides. The more common extrusion method is lateral extrusion, which drives two extrusion blocks that are set in opposite positions closer to each other in one direction and uses the limiting surfaces of the other two limiting blocks to form extrusion molding on four sides.

[0004] The inventors have discovered that there are at least the following problems in the prior art: after the extrusion is completed, the two extrusion blocks need to be driven away from the extruded square block to facilitate the picking up of the square block. Since there is still stress inside the square block, there is a large friction force between the square block and the two limiting surfaces, which leads to friction between the two limiting surfaces and burrs during the picking up of the square block. At the same time, at the joint position between the pushing surfaces of the two adjacent sets of driving mechanisms, due to the millisecond-level time difference of the driving mechanism, it is inevitable that burrs will appear on the edge of the block. For high-precision microelectronic products, such burrs mean waste. Summary of the invention

[0005] In order to solve the problem that after the existing molding device completes the extrusion molding of the block, the block contacts with two limit blocks, resulting in stress generated by the extrusion molding inside the block, which leads to subsequent burrs, the present invention provides a planar extrusion molding method and a planar extrusion molding tool for materials.

[0006] In a first aspect, the present invention provides a planar extrusion molding method of a material, the method comprising:

[0007] Step 1: Adjust the positions of the positioning block, the limiting block, the first forming block and the second forming block to form a closed extrusion space;

[0008] Step 2: placing the material in the extrusion space, driving the first molding block and / or the second molding block which are arranged in a counterposition to extrude the material to a first molding state, the distance between the first molding block and the second molding block is L1, and the first molding state includes that the material is in contact with the positioning block, the limiting block, the first molding block and the second molding block;

[0009] Step 3: Drive the first molding block and / or the second molding block to move away from the material to a second molding state, wherein the distance between the first molding block and the second molding block is L2, and the second molding state includes the expansion coefficient K1 of the material in the first molding state being greater than

[0010] Step 4: driving the limit block to move away from the material to a third forming state, wherein the third forming state includes the positioning block and the limit block being out of contact with the material;

[0011] Step 5: drive the first molding block and the second molding block to move away from the material to a fourth molding state, wherein the fourth molding state includes the first molding block and the second molding block being out of contact with the material, and removing the material in the fourth molding state.

[0012] In some embodiments, step 5 further includes: the first forming block and the second forming block move away from the material at the same speed and separate from the material at the same time.

[0013] In some embodiments, the expansion coefficient K1 of the material in the first molding state is:

[0014]

[0015] On the other hand, the present invention provides a planar extrusion molding device applied to the planar extrusion molding method of the above-mentioned material, comprising: the positioning block, the limiting block, the first molding block, the second molding block and a support; the support has a supporting surface, the positioning block is fixed on the supporting surface, the first molding block and the second molding block are symmetrically arranged on the supporting surface at intervals and are both in contact with the positioning block, the first molding block and the second molding block can slide relative to the positioning block on the supporting surface, the limiting block can be slidably set on the supporting surface, and when the positions of the positioning block, the limiting block, the first molding block and the second molding block are adjusted to form a closed extrusion space, the limiting surfaces of the limiting blocks are in contact with the first molding block and the second molding block.

[0016] In some embodiments, a first auxiliary positioning block and a second auxiliary positioning block are fixed on the supporting surface of the support, and the first auxiliary positioning block and the second auxiliary positioning block are both arranged on the same side of the positioning block, a first slide groove is formed between the first auxiliary positioning block and the positioning block, the first forming block is placed in the first slide groove, a second slide groove is formed between the second auxiliary positioning block and the positioning block, the second forming block is placed in the second slide groove, a third slide groove is formed between the first auxiliary positioning block and the second auxiliary positioning block, and the limit block is placed in the third slide groove.

[0017] In some embodiments, a guide groove is further provided on the support, and the guide groove is arranged at an end of the first slide groove away from the side where the second slide groove is located.

[0018] In some embodiments, the range of the spacing X of the first sliding groove is: (K2+1)L3+ΔH≤X,

[0019] Wherein, L3 is the distance between the positioning block and the limiting block when the material reaches the first forming state;

[0020] K2 is the expansion coefficient of the material in the third molding state;

[0021] ΔH is a preset value.

[0022] In order to solve the problem that after the extrusion molding of the existing molding device is completed, the square block is in contact with the limiting surfaces of the two limiting blocks, resulting in the subsequent generation of burrs due to internal stress, the present invention has the following advantages:

[0023] According to the technical solution of the present invention, the material in the first forming state expands for the first time along the moving direction during the movement of the first forming block and / or the second forming block away from the material, and the expansion coefficient K1 of the material in the second forming state including the first forming state is greater than Through the above arrangement, the excess stress inside the material that has expanded for the first time due to extrusion molding is not completely released along the moving direction. Therefore, when the limiting block is driven to move away from the material, the stress inside the material that has expanded for the first time that has not been released along the moving direction assists the material in the second molding state to expand for the second time to the third molding state along the moving direction of the limiting block, thereby forcing the material in the third molding state to break away from the contact between the positioning block and the limiting block, so that when the material in the fourth molding state is subsequently taken, burrs will no longer be generated due to friction between the positioning block or the limiting block. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic flow chart of a method for plane extrusion molding of a material is shown;

[0025] Figure 2 A schematic structural diagram of a flat extrusion molding tool is shown.

[0026] Figure numerals: 11 - positioning block; 12 - limiting block; 13 - first forming block; 14 - second forming block; 15 - extrusion space; 16 - support; 17 - first auxiliary positioning block; 18 - second auxiliary positioning block; 19 - guide groove. DETAILED DESCRIPTION

[0027] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0028] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0029] This embodiment discloses a planar extrusion molding method of a material, such as Figure 1 As shown, the method includes:

[0030] Step 1: Adjust the positions of the positioning block 11, the limiting block 12, the first forming block 13 and the second forming block 14 to form a closed extrusion space 15; in the present application, the closed extrusion space 15 is formed by the positioning surface of the positioning block 11, the limiting surface of the limiting block 12, and the two abutting surfaces of the first forming block 13 and the second forming block 14 that are arranged in a corresponding manner.

[0031] Step 2: placing the material in the extrusion space 15, driving the first molding block 13 and / or the second molding block 14 which are arranged in a counterposition to extrude the material to the first molding state, the distance between the first molding block 13 and the second molding block 14 is L1, and the first molding state includes that the material is in contact with the positioning block 11, the limiting block 12, the first molding block 13 and the second molding block 14; in the present application, when the material is extruded to the first molding state, the distance between the positioning block 11 and the limiting block 12 is L3.

[0032] Step 3: Drive the first molding block 13 and / or the second molding block 14 to move away from the material to a second molding state, wherein the distance between the first molding block 13 and the second molding block 14 is L2, and the second molding state includes the expansion coefficient K1 of the material in the first molding state being greater than

[0033] Step 4: driving the limiting block 12 to move away from the material to a third forming state, wherein the third forming state includes that both the positioning block 11 and the limiting block 12 are out of contact with the material;

[0034] Step 5: Drive the first molding block 13 and the second molding block 14 to move away from the material to a fourth molding state, wherein the fourth molding state includes the first molding block 13 and the second molding block 14 being out of contact with the material, and remove the material in the fourth molding state.

[0035] In the present embodiment, a planar extrusion molding method of a material is provided, in which the material in the first molding state expands for the first time along the moving direction during the movement of the first molding block 13 and / or the second molding block 14 away from the material, and the expansion coefficient K1 of the material in the second molding state including the first molding state is greater than (L2-L1) / L1. Through the above arrangement, the excess stress generated inside the material due to extrusion molding during the first expansion is not completely released along the moving direction, and then when the limiting block 12 is driven to move away from the material, the stress inside the material that has expanded for the first time that has not been released along the moving direction assists the material in the second molding state to expand for the second time to the third molding state along the moving direction of the limiting block 12, thereby forcing the material in the third molding state to break away from the contact between the positioning block 11 and the limiting block 12, so that when the material in the fourth molding state is subsequently taken, burrs will no longer be generated due to friction between the positioning block 11 or the limiting block 12.

[0036] In this embodiment, in step 3, if the first molding block 13 and / or the second molding block 14 are driven to move away from the material until the first molding block 13 and the second molding block 14 are out of contact with the material, the expansion coefficient K1 of the material in the first molding state should be K1 = (L2*L3-L1*L3) / (L1*L3), which can be simplified as At this time, when the material in the first molding state expands for the first time along the moving direction, a large amount of stress generated during extrusion molding is released, so that the material in the second molding state only has a small amount of residual stress along the moving direction of the limit block 12. When the limit block 12 is driven to move away from the material to the third molding state, the residual stress is not enough to force the material in the second molding state to break away from the contact with the positioning surface of the positioning block 11, resulting in burrs. Therefore, in order to facilitate the smooth contact between the material in the second molding state and the positioning surface of the positioning block 11, and then when the first molding block 13 and / or the second molding block 14 are driven to move away from the material to the second molding state, the expansion coefficient K1 of the material in the second molding state including the first molding state is greater than So that the material in the first molding state does not expand completely during the first expansion, that is, there is still a lot of residual stress inside the material in the second molding state formed after the first expansion. This residual stress is used to force the material in the third molding state to break away from the contact between the positioning block 11 and the limit block 12 during the second expansion.

[0037] In some embodiments, step 5 further includes: the first forming block 13 and the second forming block 14 move away from the material at the same speed and separate from the material at the same time.

[0038] In this embodiment, through the above-mentioned arrangement, the material that has undergone the second expansion to the third forming state continues to expand in the directions of movement of the first forming block 13 and the second forming block 14 respectively when the first forming block 13 and the second forming block 14 are separated from each other at the same time, so that the expansion in the two directions is consistent, that is, the internal stress of the material that finally expands to the fourth forming state is evenly distributed, thereby obtaining the excellent block-shaped material.

[0039] In some embodiments, the expansion coefficient K1 of the material in the first molding state is:

[0040]

[0041] In this embodiment, in step 3, when the first forming block 13 and / or the second forming block 14 are driven to move away from the material to the second forming state, the distance L2 between the first forming block 13 and the second forming block 14 is adjusted to adjust the state in which the material in the first forming state undergoes the first expansion. So that after the first expansion of the material in the first forming state, there will not be too much residual stress inside the material in the second forming state, which will cause the material in the third forming state to expand too far in the moving direction of the limit block 12 during the subsequent second expansion, resulting in the product being unqualified in size; when the limit block 12 is used, the material in the second forming state is not subjected to the first expansion. This ensures that after the material in the first molding state undergoes the first expansion, there will not be too little residual stress inside the material in the second molding state, resulting in the residual stress being insufficient to force the material in the second molding state to break away from the contact with the positioning surface of the positioning block 11 when the limit block 12 is subsequently driven to move away from the material to the third molding state.

[0042] On the other hand, this embodiment discloses a planar extrusion molding tool, which is applied to the planar extrusion molding method of the material as described above. Figure 2 As shown, the tooling includes: the positioning block 11, the limiting block 12, the first forming block 13, the second forming block 14 and a support 16; the support 16 has a supporting surface, the positioning block 11 is fixed on the supporting surface, the first forming block 13 and the second forming block 14 are symmetrically arranged on the supporting surface at intervals and are both in contact with the positioning block 11, the first forming block 13 and the second forming block 14 can slide relative to the positioning block 11 on the supporting surface, the limiting block 12 can be slidably arranged on the supporting surface, when the positions of the positioning block 11, the limiting block 12, the first forming block 13 and the second forming block 14 are adjusted to form a closed extrusion space 15, the limiting surfaces of the limiting block 12 are in contact with the first forming block 13 and the second forming block 14.

[0043] In this embodiment, through the above-mentioned structural setting, the driving mechanism can be used to drive the first molding block 13 and the second molding block 14 to move toward or away from the positioning surface of the positioning block 11 on the supporting surface, and by controlling the moving position of the limit block 12, the limit surface of the limit block 12 is always in contact with the first molding block 13 and the second molding block 14, and further the positioning surface of the positioning block 11, the limit surface of the limit block 12, and the two abutment surfaces of the first molding block 13 and the second molding block 14 are arranged to form a closed extrusion space 15.

[0044] In this embodiment, after the powder or mud material is placed in the extrusion space 15, the first forming block 13 and / or the second forming block 14 are driven to move toward the side where the material is located and extrude the material so that the powder or mud is extruded into the shape of a block.

[0045] In some embodiments, a first auxiliary positioning block 17 and a second auxiliary positioning block 18 are also fixed on the supporting surface of the support 16, and the first auxiliary positioning block 17 and the second auxiliary positioning block 18 are both arranged on the same side of the positioning block 11, and a first slide groove is formed between the first auxiliary positioning block 17 and the positioning block 11, and the first forming block 13 is placed in the first slide groove, and a second slide groove is formed between the second auxiliary positioning block 18 and the positioning block 11, and the second forming block 14 is placed in the second slide groove, and a third slide groove is formed between the first auxiliary positioning block 17 and the second auxiliary positioning block 18, and the limit block 12 is placed in the third slide groove.

[0046] In this embodiment, through the above-mentioned setting, the first forming block 13 can be limited to move in the first slide groove, and then the position of the first forming block 13 can be accurately controlled by the driving mechanism to improve the size control accuracy of the extruded material; similarly, the second forming block 14 is configured in the same way as the limit block 12, and this application will not describe it in detail.

[0047] In some embodiments, a guide groove 19 is further provided on the support 16 , and the guide groove 19 is arranged at one end of the first slide groove away from the side where the second slide groove is located.

[0048] Furthermore, the range of the spacing X of the first chute is: (K2+1)L3+ΔH≤X,

[0049] Wherein, L3 is the distance between the positioning block 11 and the limiting block 12 when the material reaches the first forming state;

[0050] K2 is the expansion coefficient of the material in the third molding state;

[0051] ΔH is a preset value.

[0052] In this embodiment, through the above-mentioned arrangement, after the driving mechanism drives the first forming block 13 to move away from the side where the material is located in the first chute, the guide groove 19 is forced to be connected to the closed space through the first chute. At this time, the driving mechanism can control and drive the second forming block 14 to move toward the side where the material in the fourth forming state is located in the closed space, forcing the abutment surface of the second forming block 14 to push the material in the fourth forming state to move toward the side where the guide groove 19 is located, and then fall into the guide groove 19 to complete the collection of the material in the fourth forming state. In this application, the preset value of ΔH is the distance moved between the material in the third forming state after the second expansion and the positioning surface of the positioning block 11. Among them, the expansion coefficient K2 of the material in the second forming state at this time should be K2 = (L4*L2-L3*L2) / (L3*L2), which is simplified to Wherein, L4 is the length of the material in the third forming state after the second expansion along the moving direction of the limit block 12. From the above, it can be known that in order to facilitate automatic material removal, the spacing of the first chute can be X≥L4+ΔH=(K2+1)L3+ΔH.

[0053] In summary, the material in the first forming state expands for the first time along the moving direction during the movement of the first forming block and / or the second forming block away from the material, and the expansion coefficient K1 of the material in the second forming state including the first forming state is greater than Through the above arrangement, the excess stress inside the material that has expanded for the first time due to extrusion molding is not completely released along the moving direction. Therefore, when the limiting block is driven to move away from the material, the stress inside the material that has expanded for the first time that has not been released along the moving direction assists the material in the second molding state to expand for the second time to the third molding state along the moving direction of the limiting block, thereby forcing the material in the third molding state to break away from the contact between the positioning block and the limiting block, so that when the material in the fourth molding state is subsequently taken, burrs will no longer be generated due to friction between the positioning block or the limiting block.

[0054] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0055] In addition, it should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that those skilled in the art can understand.

Claims

1. A method for plane extrusion molding of a material, characterized in that: The following steps are involved: Step 1: Adjust the positions of the positioning block, the limiting block, the first forming block and the second forming block to form a closed extrusion space; Step 2: placing the material in the extrusion space, driving the first molding block and / or the second molding block which are arranged in a counterposition to extrude the material to a first molding state, the distance between the first molding block and the second molding block is L1, and the first molding state includes that the material is in contact with the positioning block, the limiting block, the first molding block and the second molding block; Step 3: Drive the first molding block and / or the second molding block to move away from the material to a second molding state, wherein the distance between the first molding block and the second molding block is L2, and the second molding state includes the expansion coefficient K1 of the material in the first molding state being greater than Step 4: driving the limit block to move away from the material to a third forming state, wherein the third forming state includes the positioning block and the limit block being out of contact with the material; Step 5: drive the first molding block and the second molding block to move away from the material to a fourth molding state, wherein the fourth molding state includes the first molding block and the second molding block being out of contact with the material, and removing the material in the fourth molding state.

2. The planar extrusion molding method of a material as claimed in claim 1, characterized in that: Step 5 also includes: the first forming block and the second forming block move away from the material at the same speed and separate from the material at the same time.

3. A flat extrusion molding tool for materials, applied to the flat extrusion molding method of materials as claimed in claim 1 or 2, characterized in that: include: The expansion coefficient K1 of the material in the first molding state is:

4. A flat extrusion molding tool, applied to the flat extrusion molding method of the material as claimed in any one of claims 1 to 3, characterized in that: It includes: the positioning block, the limiting block, the first forming block, the second forming block and a support; The support has a supporting surface, the positioning block is fixed on the supporting surface, the first forming block and the second forming block are symmetrically arranged on the supporting surface and are both in contact with the positioning block, the first forming block and the second forming block can slide relative to the positioning block on the supporting surface, and the limit block can be slidably set on the supporting surface. When the positions of the positioning block, the limit block, the first forming block and the second forming block are adjusted to form a closed extrusion space, the limit surfaces of the limit block are in contact with the first forming block and the second forming block.

5. The flat extrusion molding tool as claimed in claim 4, characterized in that: A first auxiliary positioning block and a second auxiliary positioning block are also fixed on the supporting surface of the support, and the first auxiliary positioning block and the second auxiliary positioning block are both arranged on the same side of the positioning block, a first slide groove is formed between the first auxiliary positioning block and the positioning block, the first forming block is placed in the first slide groove, a second slide groove is formed between the second auxiliary positioning block and the positioning block, the second forming block is placed in the second slide groove, a third slide groove is formed between the first auxiliary positioning block and the second auxiliary positioning block, and the limit block is placed in the third slide groove.

6. The flat extrusion molding tool as claimed in claim 5, characterized in that: The support is also provided with a guide groove, and the guide groove is arranged at one end of the first slide groove away from the side where the second slide groove is located.

7. The flat extrusion molding tool as claimed in claim 6, characterized in that: The range of the spacing X of the first chute is: (K2+1)L3+ΔH≤X, Wherein, L3 is the distance between the positioning block and the limiting block when the material reaches the first forming state; K2 is the expansion coefficient of the material in the third molding state; ΔH is a preset value.

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