An injection mold

Abstract

The utility model discloses an injection mold, which includes a template assembly, a mold core assembly and a plurality of squeeze blocks. The template assembly is provided with a slot, the mold core assembly and the plurality of squeeze blocks are arranged in the slot, and the plurality of squeeze blocks are in conflict with at least two adjacent sides of the mold core assembly; the mold core assembly includes a front mold core and a rear mold core, the front mold core is located above the rear mold core in the vertical height direction, the front mold core is provided with a model groove opening downward, the rear mold core is provided with a protrusion, the protrusion is located in the model groove, and the front mold core and the rear mold core are surrounded to form a mold cavity. The utility model is provided with a plurality of squeeze blocks, which is convenient for disassembly and assembly, saves labor and time, and is also convenient for limiting. In addition, a model cavity for preparing a product can be formed by the gap between the protrusion of the rear mold core and the model groove of the front mold core, so as to prepare products of corresponding shapes.

Description

Technical Field

[0001] The utility model relates to the field of mechanical manufacturing, in particular to an injection mold. Background Art

[0002] With the development of modern industry, injection molds play a vital role in the manufacturing process of various products. Injection molds are tools used to make molded objects in industrial production. Through injection molds, raw materials can be processed into products with specific shapes and sizes. These products are widely used in electronics, construction, automobiles and other fields. However, traditional injection molds have complex structures. When installing and disassembling injection molds (such as mold cores), the installation and disassembly steps are relatively cumbersome, which consumes more time and has low efficiency. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an injection mold to solve the problem that when installing and disassembling the mold core and other parts in the injection mold, the installation and disassembly steps are relatively cumbersome and time-consuming.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] An injection mold comprises a template assembly, a mold core assembly and a plurality of squeezing blocks, wherein the template assembly is provided with a slot, the mold core assembly and the plurality of squeezing blocks are arranged in the slot, and the plurality of squeezing blocks are in conflict with at least two adjacent sides of the mold core assembly; the mold core assembly comprises a front mold core and a rear mold core, the front mold core is located above the rear mold core in the vertical height direction, the front mold core is provided with a model groove opening downward, the rear mold core is provided with a protrusion, the protrusion is located in the model groove, and the front mold core and the rear mold core together form a mold cavity.

[0006] Furthermore, in the injection mold described in the utility model, the template assembly includes a front template and a rear template, the front template is arranged above the rear template in the vertical height direction, the front template is provided with a first card slot, and the rear template is provided with a second card slot; wherein the front mold core is provided in the first card slot, and the rear mold core is provided in the second card slot.

[0007] Furthermore, in the injection mold described in the utility model, the squeezing block includes a first squeezing block and a second squeezing block, the first squeezing block is arranged in the first slot and conflicts with the side of the front mold core, and the second squeezing block is arranged in the second slot and conflicts with the side of the rear mold core.

[0008] Furthermore, in the injection mold described in the utility model, the cross-sectional area of ​​the first squeezing block gradually decreases from bottom to top along the vertical height direction, and the cross-sectional area of ​​the second squeezing block gradually increases from bottom to top along the vertical height direction.

[0009] Furthermore, the injection mold described in the present invention also includes a first locking member and a second locking member, at least a portion of the first locking member is embedded in the first squeezing block, and another portion of the first locking member is embedded in the front template; at least a portion of the second locking member is embedded in the second squeezing block, and another portion of the second locking member is embedded in the rear template.

[0010] Furthermore, in the injection mold described in the utility model, the first squeezing block is provided with a first screw hole opening toward the rear template, and the second squeezing block is provided with a second screw hole opening toward the front template.

[0011] Furthermore, in the injection mold described in the utility model, at least two of the first squeezing blocks are included, the first squeezing blocks are in conflict with the front mold core, and at least one of the first squeezing blocks is arranged transversely in the horizontal direction, and the remaining first squeezing blocks are arranged longitudinally in the horizontal direction.

[0012] Furthermore, the injection mold described in the utility model also includes a gate plate and a nozzle, the gate plate is arranged above the front template in the vertical height direction, and the nozzle is arranged on the gate plate.

[0013] Furthermore, the injection mold described in the utility model also includes an injection pipe, one end of which is connected to the feed port of the nozzle, and the other end of which is connected to the model cavity.

[0014] Furthermore, in the injection mold described in the utility model, an annular portion is also provided on the rear mold core, the protrusion is arranged in the annular portion, and a peripheral portion is provided at the surrounding positions of the bottom of the model groove of the front mold core, and the peripheral portion and the annular portion are in conflict with each other.

[0015] The beneficial effect of the utility model is that when installing the core assembly of the injection mold to the template assembly, the core assembly can be placed (i.e., embedded) in the card slot of the template assembly first. Since the card slot can accommodate the core assembly and the squeeze block, the accommodating space of the card slot is larger than the volume of the core assembly. At this time, the core assembly can be directly and quickly placed in the card slot, which is convenient and fast. After that, multiple squeeze blocks are embedded into the preset positions of the card slot. In the process of embedding multiple squeeze blocks into the card slot, the squeeze blocks will squeeze the core assembly to cause the core assembly to move, and then the corresponding position of the core assembly on the template assembly can be quickly adjusted (i.e., the core assembly is limited), so that the core assembly can be quickly installed on the template assembly, thereby improving the installation efficiency. When removing the core assembly of the injection mold from the template assembly, the squeeze block can be removed first. After the squeeze block is removed, since there is a remaining accommodation space (operable space) in the card slot, the mold core assembly can be easily taken out from the card slot of the template assembly through the remaining accommodation space, that is, it can be quickly disassembled, thereby improving the disassembly efficiency. In addition, the utility model is provided with a model groove with a downward opening on the front mold core plate, and a protrusion is provided on the rear mold core plate, and the protrusion is located in the model groove, so that the gap between the protrusion and the model groove is the model cavity for preparing the product, so as to prepare the product of the corresponding shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the injection mold of the utility model in one embodiment from one viewing angle;

[0017] Figure 2 for Figure 1 A top view of the injection mold shown;

[0018] Figure 3 for Figure 2 Sectional view of section AA;

[0019] Figure 4 for Figure 1 A right side view of the injection mold shown;

[0020] Figure 5 for Figure 4 Sectional view of the middle BB section;

[0021] Figure 6 for Figure 1 A front view of the injection mold is shown;

[0022] Figure 7 for Figure 6 Sectional view of the CC section;

[0023] Figure 8 for Figure 1The structure explosion diagram of the injection mold shown in FIG. 1 is a perspective view after hiding part of the structure;

[0024] Fig. 9 for Figure 1 The injection mold shown is an exploded view of the structure from another perspective after hiding part of the structure.

[0025] Description of labels:

[0026] 1. Template assembly; 11. Front template; 12. Rear template;

[0027] 2. mold core assembly; 21. front mold core; 211. mold groove; 212. peripheral portion; 213. convex portion; 22. rear mold core; 221. raised portion; 222. annular portion; 223. concave groove;

[0028] 3. First squeezing block; 31. First locking piece; 32. First screw hole;

[0029] 4. second squeezing block; 41. second locking member; 42. second screw hole;

[0030] 5. Nozzle plate;

[0031] 6. Nozzle; 61. Feed hole;

[0032] 7. Needle plate;

[0033] 8. Bottom plate;

[0034] 9. Panel;

[0035] 10. Injection molding pipes. DETAILED DESCRIPTION

[0036] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0037] Please refer to Figures 1 to 9 The utility model designs an injection mold, which includes a template component 1, a mold core component 2 and a plurality of squeeze blocks. The template component is provided with a slot, the mold core component and the plurality of squeeze blocks are arranged in the slot, and the plurality of squeeze blocks are in conflict with at least two adjacent sides of the mold core component; the mold core component 2 includes a front mold core 21 and a rear mold core 22, the front mold core 21 is located above the rear mold core 22 in the vertical height direction, the front mold core is provided with a model groove 211 opening downward, the rear mold core is provided with a protrusion 221, the protrusion 221 is located in the model groove 211, and the front mold core and the rear mold core are surrounded to form a mold cavity.

[0038] The structural principle / working principle of the utility model is briefly described as follows: when installing the core component 2 of the injection mold to the template component 1, the core component 2 can be placed (i.e., embedded) in the slot of the template component 1. Since the slot can accommodate the core component 2 and the squeeze block, the accommodating space of the slot is larger than the volume of the core component 2. At this time, the core component 2 can be directly and quickly placed in the slot, which is convenient and fast. After that, multiple squeeze blocks are embedded into the preset positions of the slot. In the process of embedding multiple squeeze blocks into the slot, the squeeze blocks will squeeze the core component 2 to prompt the core component 2 to move its position, and then the corresponding position of the core component 2 on the template component 1 can be quickly adjusted (i.e., the core component is limited), so that the core component 2 can be quickly installed on the template component 1, thereby improving the installation efficiency. When removing the core component 2 of the injection mold from the template component 1, the squeeze block can be removed first. After the squeezing block is removed, since there is remaining accommodating space (operable space) in the slot, the mold core assembly 2 can be easily removed from the slot of the template assembly 1 through the remaining accommodating space, that is, it can be disassembled quickly, thereby improving disassembly efficiency.

[0039] In addition, in the injection mold described in the utility model, the mold core assembly 2 includes a front mold core 21 and a rear mold core 22, and the front mold core 21 is located above the rear mold core 22. On this basis, the front mold core plate is provided with a model groove 211 opening downward, and the rear mold core plate is provided with a protrusion 221, and the protrusion 221 is located in the model groove 211, and the gap between the protrusion and the model groove 211 is the model cavity for preparing the product. In the above technical solution of the utility model, by setting the front mold core 21 and the rear mold core 22, and enclosing the front and rear mold cores 22 to form a mold cavity, by injecting the molten blank into the mold cavity, the corresponding product can be prepared.

[0040] Furthermore, in the injection mold described in the utility model, the template assembly includes a front template 11 and a rear template 12, the front template is arranged above the rear template in the vertical height direction, the front template is provided with a first card slot, and the rear template is provided with a second card slot; wherein the front mold core 21 is provided in the first card slot, and the rear mold core 22 is provided in the second card slot.

[0041] In the above technical solution of the utility model, when demolding is performed, the front and rear templates 12 will be separated. Therefore, the front mold core 21 is embedded in the first slot of the front template 11, and the rear mold core 22 is embedded in the second slot of the rear template 12, so that when demolding is performed later, the front and rear mold cores 22 can respectively follow the front and rear templates 12 to achieve the separation effect for demolding.

[0042] Furthermore, in the injection mold described in the utility model, the squeezing block includes a first squeezing block 3 and a second squeezing block 4, the first squeezing block 3 is arranged in the first slot and conflicts with the side of the front mold core, and the second squeezing block is arranged in the second slot and conflicts with the side of the rear mold core.

[0043] In the above technical solution of the utility model, when the front mold core 21 of the injection mold is installed to the front template 11, the front mold core 21 can be placed (i.e., embedded) in the first slot of the front template 11. Since the first slot can accommodate the front mold core 21 and the first squeezing block 3, the accommodating space of the first slot is larger than the volume of the front mold core 21. At this time, the front mold core 21 can be directly placed in the slot, which is convenient and fast. After that, multiple first squeezing blocks 3 are embedded into the preset position of the first slot. In the process of embedding multiple first squeezing blocks 3 into the first slot, the squeezing blocks will squeeze the front mold core 21 to prompt the front mold core 21 to move its position, and then the corresponding position of the front mold core 21 on the front template 11 can be quickly adjusted, that is, the front mold core 21 can be quickly installed on the front template 11 to improve the installation efficiency. When the front mold core 21 of the injection mold needs to be removed from the front template 11, the first squeezing block 3 can be removed first. Since the first squeeze block 3 in the slot has been removed, there is a remaining accommodation space (operable space) in the first slot, and the mold core assembly 2 can be easily taken out of the slot of the template assembly 1 through the remaining accommodation space, that is, it can be quickly disassembled to improve the disassembly efficiency. Correspondingly, the installation and disassembly principle of the rear mold core 22 is similar to the installation and disassembly principle of the front mold core 21.

[0044] Furthermore, in the injection mold described in the present invention, the cross-sectional area of ​​the first squeezing block 3 gradually decreases from bottom to top along the vertical height direction, and the cross-sectional area of ​​the second squeezing block 4 gradually increases from bottom to top along the vertical height direction.

[0045] In the above technical solution of the utility model, the cross-sectional area of ​​the first squeezing block 3 in the vertical height direction is gradually reduced upward along the vertical height direction, so that when the first squeezing block 3 is inserted into the first slot, it can be inserted from the end with a smaller cross-sectional area, making the insertion process easier. Similarly, the cross-sectional area of ​​the second squeezing block 4 in the vertical height direction is gradually increased upward along the vertical height direction, so that when the second squeezing block 4 is inserted into the second slot, it can be inserted from the end with a smaller cross-sectional area, making the insertion process easier.

[0046] Furthermore, in the injection mold described in the present invention, it also includes a first locking member 31 and a second locking member 41, at least a portion of the first locking member is embedded in the first extrusion block, and another portion of the first locking member is embedded in the front template; at least a portion of the second locking member is embedded in the second extrusion block, and another portion of the second locking member is embedded in the rear template.

[0047] In the above technical solution of the utility model, by providing a first locking member 31 (such as a bolt), the first squeeze block 3 can be quickly and effectively fixed or removed from the front template 11. Correspondingly, by providing a second locking member, the second squeeze block 4 can be quickly and effectively fixed or removed from the rear template 12.

[0048] Furthermore, in the injection mold described in the present invention, the first squeezing block is provided with a first screw hole 32 opening toward the rear template, and the second squeezing block is provided with a second screw hole 42 opening toward the front template.

[0049] In the above technical solution of the utility model, the first squeeze block 3 is provided with a first screw hole 32 on the surface not covered by the front mold core 21 and the front mold plate 11, that is, a first screw hole 32 with an opening toward the rear mold plate is provided, and the first screw hole 32 can be used to insert an object A with a screw. When the first squeeze block 3 is disassembled, the object A can be inserted into the first screw hole 32, and then the object A is moved in a direction away from the front mold plate 11. At this time, the first squeeze block 3 can be quickly and effectively removed from the first slot. Similarly, the second squeeze block 4 can also be quickly and effectively removed from the second slot.

[0050] Furthermore, in the injection mold described in the utility model, at least two of the first squeezing blocks are included, the first squeezing blocks are in conflict with the front mold core, and at least one of the first squeezing blocks is arranged transversely in the horizontal direction, and the remaining first squeezing blocks are arranged longitudinally in the horizontal direction.

[0051] In the above technical solution of the utility model, different squeezing blocks are respectively arranged on the adjacent sides of the front mold core 21 in different directions, so that the position of the front mold core 21 in the horizontal direction can be quickly adjusted.

[0052] Furthermore, the injection mold of the present invention further comprises a gate plate 5 and a nozzle 6, wherein the gate plate is arranged above the front mold plate in the vertical height direction, and the nozzle is arranged on the gate plate.

[0053] Furthermore, the injection mold of the present invention further comprises an injection pipe 10, one end of the injection pipe 10 is connected to the feed port of the nozzle 6, and the other end of the injection pipe 10 is connected to the model cavity.

[0054] In the above technical solution of the utility model, by setting the corresponding nozzle 6 and injection pipe, the blank (ie the material for preparing the product) can effectively enter the mold cavity through the nozzle 6 and the injection pipe to prepare the product.

[0055] Furthermore, in the injection mold described in the present invention, an annular portion 222 is also provided on the rear mold core 22, the protrusion 221 is arranged in the annular portion 222, and a peripheral portion 212 is provided around the bottom of the model groove 211 of the front mold core 21, and the peripheral portion 212 and the annular portion 222 are in conflict with each other.

[0056] In the injection mold described in the utility model, the rear mold core is provided with an annular portion on the periphery of the raised portion, and the front mold core plate is provided with a peripheral portion around the bottom of the model groove. The peripheral portion and the annular portion interfere with each other to achieve the effect of sealing the model cavity, thereby enclosing a model cavity that can be used to prepare products.

[0057] Please refer to Figures 1 to 6 The first embodiment of the utility model is: an injection mold, which can be used to make molded articles. In this embodiment, the injection mold includes a panel 9, a nozzle plate 5, a front mold plate 11, a front mold core 21, a rear mold core 22, a rear mold plate 12, a needle plate 7 and a bottom plate 8 connected in sequence from top to bottom. Figures 1 to 9 The above components are described in detail.

[0058] In this embodiment, the above panel is arranged above the nozzle plate 5, and the panel 9 is provided with a guide hole. The above nozzle plate 5 is provided with a nozzle 6, and a feed hole 61 and a funnel groove connected with the feed hole 61 are provided in the nozzle 6. The feed hole is arranged at the bottom of the funnel groove. The funnel groove is coaxially arranged with the guide hole, and the cross section of the funnel groove in the vertical height direction gradually increases upward along with the vertical height direction. In addition, an injection molding pipe is also provided in the injection mold of the utility model, and the injection molding pipe can be used for passing the molten material (material for preparing the product). One end of the injection molding pipe is connected with the feed hole of the nozzle 6, and the other end is connected with the mold cavity. That is, the molten material can pass through the nozzle 6, the feed hole and the injection molding pipe in sequence, and finally flow into the mold cavity to prepare a product of corresponding shape.

[0059] In this embodiment, the front template 11 is arranged below the nozzle plate 5, and the front template 11 is provided with a first slot opening toward the rear template 12, and a detachable front mold core 21 and three first squeeze blocks 3 are arranged in the first slot, and the three first squeeze blocks 3 have similar or identical structures, specifically: the cross section of the first squeeze block 3 in the vertical height direction gradually decreases upward along the vertical height direction, and the first squeeze block 3 is provided with two through holes extending along the vertical height direction, and the two through holes are used for the first locking member 31 (such as bolts) to pass through, and the first locking member 31 passes through the through holes on the first squeeze block 3 and is embedded in the front template 11, so as to fix the first squeeze block 3 on the front template 11, thereby setting the first squeeze block 3 in the first slot. In addition, the first squeeze member is provided with a first screw hole 32 at the middle position of the two through holes. It should be noted that among the above-mentioned three first squeezing blocks 3, one first squeezing block rests on the side extending along the horizontal width direction of the front mold core 21, two first squeezing blocks rest on the side extending along the horizontal length direction of the front mold core 21, and these two first longitudinal squeezing blocks are located on the same side.

[0060] Correspondingly, the above-mentioned rear template 12 is arranged below the front template 11, and the rear template 12 is provided with a second card slot with an opening toward the front template 11. A detachable rear mold core 22 and three second squeezing blocks 4 are provided in the second card slot. The three second squeezing blocks 4 have similar or identical structures. Specifically, the cross-section of the second squeezing block 4 in the vertical height direction gradually increases upward along the vertical height direction. The second squeezing block 4 is provided with two through holes extending in the vertical height direction. The two through holes are used for the second locking member 41 (such as bolts) to pass through. The second locking member 41 passes through the through holes on the second squeezing block 4 and is embedded in the rear template 12 to fix the second squeezing block 4 on the rear template 12, thereby setting the second squeezing block 4 in the second card slot. In addition, the second squeezing member is provided with a second screw hole 42 at the middle position of the two above-mentioned through holes. It should be noted that, among the above three second squeezing blocks 4, one second squeezing block 4 abuts against the side of the front mold core 21 extending in the horizontal width direction, and two second squeezing blocks 4 abut against the side of the front mold core 21 extending in the horizontal length direction, and these two second squeezing blocks 4 are both located on the same side. It should be noted that the above front mold core 21 and the rear mold core 22 are arranged relatively to each other, and the front mold core 21 is located above the rear mold core 22, and the front mold core 21 and the rear mold core 22 together form a mold cavity for preparing a product, and the front mold core includes two front mold core plates connected to each other, and the front mold core plates are provided with a mold groove opening downward. It should be noted that the shapes of the two front mold core plates can be selected according to actual conditions, such as Figure 7 , Figure 8 as well as Figure 8As shown, one of the two front mold plates is provided with a peripheral portion at the bottom of the mold groove, and the other front mold plate is provided with a convex portion 213 protruding outward at the bottom of the mold groove. Correspondingly, the rear mold includes two rear mold plates, and a convex portion is provided at the middle position of the rear mold plate, and the convex portion is located in the mold groove. Similarly, the shapes of the two front mold plates can be selected according to actual conditions, such as Figure 7 , Figure 8 as well as Fig. 9 As shown, one of the two rear mold core plates is provided with an annular portion 222 on the periphery of the raised portion, and the other rear mold core plate is provided with a downwardly recessed groove 223 on the upper surface of the raised portion, and the overall shape of the recessed groove is similar to a round fan, and the handle of the round fan is tilted downward. It should be noted that the peripheral portion 212 is correspondingly arranged with the annular portion 222, and the peripheral portion 212 is located above the annular portion 222 and contacts each other to enclose a mold cavity of a corresponding shape. The above-mentioned convex portion 213 is correspondingly arranged with the above-mentioned recessed groove 223 to enclose a mold cavity of a corresponding shape.

[0061] In summary, the injection mold provided by the utility model sets a front mold core in the first slot of the front mold core, and sets a plurality of first squeeze blocks on two adjacent sides of the front mold core, so that the first squeeze blocks abut against the sides of the front mold core, which is convenient for disassembly and assembly, saving labor and time. Similarly, a rear mold core is set in the second slot of the rear mold core, and sets a plurality of second squeeze blocks on two adjacent sides of the rear mold core, so that the first squeeze blocks abut against the sides of the front mold core, which is convenient for disassembly and assembly, saving labor and time.

[0062] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. An injection mold, characterized in that: It includes a template assembly, a mold core assembly and a plurality of squeezing blocks, the template assembly is provided with a slot, the mold core assembly and the plurality of squeezing blocks are arranged in the slot, and the plurality of squeezing blocks are in conflict with at least two adjacent sides of the mold core assembly; the mold core assembly includes a front mold core and a rear mold core, the front mold core is located above the rear mold core in the vertical height direction, the front mold core is provided with a model groove opening downward, the rear mold core is provided with a protrusion, the protrusion is located in the model groove, and the front mold core and the rear mold core together form a model cavity.

2. The injection mold according to claim 1, characterized in that: The template assembly includes a front template and a rear template, the front template is arranged above the rear template in the vertical height direction, the front template is provided with a first card slot, and the rear template is provided with a second card slot; wherein the front mold core is arranged in the first card slot, and the rear mold core is arranged in the second card slot.

3. The injection mold according to claim 2, characterized in that: The squeezing block includes a first squeezing block and a second squeezing block, wherein the first squeezing block is arranged in the first slot and abuts against the side of the front mold core, and the second squeezing block is arranged in the second slot and abuts against the side of the rear mold core.

4. The injection mold according to claim 3, characterized in that: The cross-sectional area of ​​the first squeezing block gradually decreases from bottom to top along the vertical height direction, and the cross-sectional area of ​​the second squeezing block gradually increases from bottom to top along the vertical height direction.

5. The injection mold according to claim 3, characterized in that: It also includes a first locking member and a second locking member, at least a portion of the first locking member is embedded in the first squeezing block, and another portion of the first locking member is embedded in the front template; At least a portion of the second locking member is embedded in the second squeezing block, and another portion of the second locking member is embedded in the rear template.

6. The injection mold according to claim 3, characterized in that: The first squeezing block is provided with a first screw hole opening toward the rear template, and the second squeezing block is provided with a second screw hole opening toward the front template.

7. The injection mold according to claim 3, characterized in that: It comprises at least two of the first squeezing blocks, the first squeezing blocks are in conflict with the front mold core, and at least one of the first squeezing blocks is arranged transversely along the horizontal direction, and the other first squeezing blocks are arranged longitudinally along the horizontal direction.

8. The injection mold according to claim 2, characterized in that: It also includes a nozzle plate and a nozzle, wherein the nozzle plate is arranged above the front template in the vertical height direction, and the nozzle is arranged on the nozzle plate.

9. The injection mold according to claim 8, characterized in that: It also includes an injection molding pipeline, one end of which is connected to the feed port of the nozzle, and the other end of which is connected to the mold cavity.

10. The injection mold according to claim 1, characterized in that: The rear mold core is also provided with an annular portion, the protrusion is arranged in the annular portion, and the front mold core is provided with a peripheral portion at the positions around the bottom of the groove of the model groove, and the peripheral portion and the annular portion are in conflict with each other.

Images