Injection mold for U-shaped lampshade

Abstract

The utility model discloses an injection mold for a U-shaped lampshade, which belongs to the field of lampshade injection molds and comprises a hot runner socket, a fixed mold system, a movable mold system, an ejector pin system, an upper mold core, a matte texture layer, a hot runner sleeve, a slide block wear-resistant block, a slide block seat, a slide block spring, a slide block inclined guide post, a pressing guide block, a side mold core, a lower mold core, a bidirectional channel, a lower mold insert and a product body. According to the utility model, the matte surface can be directly formed on the surface in the injection molding process of the product body, and the matte surface is not required to be processed by additional equipment after the product body is demolded and taken out, so that the time cost and the labor cost of production are reduced, new errors or flaws caused by secondary processing are avoided, and the production efficiency is improved. And therefore, the quality and the consistency of the final product can be improved, and the quality of the product body can be improved.

Description

Technical Field

[0001] This utility model relates to the field of lampshade injection molds, and in particular to an injection mold for U-shaped lampshades. Background Technology

[0002] In the current lampshade manufacturing industry, especially for specific shaped products like U-shaped lampshades, traditional injection molds typically cannot directly impart special textured effects to the product surface during the molding process, such as a matte finish; instead, they mold a mirror-like effect. This means that after the initial molding of the product body using traditional equipment, additional equipment is required for further processing to achieve the desired surface treatment. This not only increases production time and labor costs but may also introduce new errors or defects due to secondary processing, affecting the quality and consistency of the final product. Utility Model Content

[0003] The purpose of this invention is to solve the problems mentioned in the background art by designing an injection mold for U-shaped lampshades.

[0004] The technical solution of this utility model to achieve the above objectives is as follows: an injection mold for a U-shaped lampshade, comprising a hot runner socket, a fixed mold system, a moving mold system, an ejector pin system, an upper mold core, a matte texture layer, a hot runner sleeve, a slider wear-resistant block, a slider seat, a slider spring, a slider inclined guide post, a pressure guide block, a side mold core, a lower mold core, a bidirectional runner, a lower mold insert, and a product body. The hot runner socket is installed on the fixed mold system, the upper mold core is installed on the fixed mold system, the upper mold core has a matte texture layer, the hot runner sleeve is installed at the center of the fixed mold system, the slider wear-resistant block is fixedly connected to the fixed mold system by bolts, and the slider seat is slidably connected to the slider wear-resistant block. Next, the slider spring is located inside the slider seat and is fixedly connected to the slider seat. The slider spring is fitted onto the slider inclined guide post. One end of the slider inclined guide post is located inside the slider seat, and the other end of the slider inclined guide post is fixedly connected to the pressure guide block. The pressure guide block is fixedly connected to the fixed mold system by bolts. The slider seat is fixedly connected to the side mold core by bolts. The side mold core has a matte texture layer. The lower mold core is installed on the moving mold system. The lower mold core has a bidirectional track. The lower mold insert is installed on the lower mold core. The product body is located on the lower mold insert. The moving mold system is slidably installed below the fixed mold system. The ejector pin system is installed below the moving mold system.

[0005] Furthermore, the fixed mold system includes a fixed mold, a fixed mold guide sleeve, a mold panel, a mold heat insulation plate, and a mold positioning ring. A fixed mold guide sleeve is fixedly connected to each of the four lower corners of the fixed mold. The fixed mold and the slider wear block are fixedly connected by bolts. The hot runner socket is inserted into the side of the fixed mold. The mold panel and the fixed mold are fixedly connected by bolts. The mold heat insulation plate and the mold panel are fixedly connected by bolts. The mold positioning ring is fixedly connected to the mold heat insulation plate and the hot runner sleeve.

[0006] Furthermore, the moving mold system includes a moving mold template, moving mold guide pillars, mold square iron, mold base plate, mold support pillars, ejector plate guide pillars, and ejector plate guide sleeves. Each of the four corners of the moving mold template is fixedly connected to a moving mold guide pillar. The moving mold guide pillars are slidably installed within the fixed mold system. The moving mold template is fixedly connected to the lower mold core by bolts. The lower part of the moving mold template is fixedly connected to the mold square iron. The bottom of the mold square iron is fixedly connected to the mold base plate. The mold base plate is fixedly connected to one end of the mold support pillar. The mold support pillar passes through the ejector system, and the other end of the mold support pillar is fixedly connected to the moving mold template. The bottom of the ejector plate guide pillar is fixedly connected to the mold base plate by bolts. The top of the ejector plate guide pillar is fixedly connected to the moving mold template. The ejector plate guide sleeve is slidably fitted onto the ejector plate guide pillar and is installed on the ejector system.

[0007] Furthermore, the ejector system includes an ejector plate, an ejector plate return pin, an ejector plate spring, an ejector body, and an ejector base plate. The ejector plate is fixedly connected to the ejector plate return pin, the ejector plate return pin passes through the moving mold system and is fixedly connected to the fixed mold system by bolts, one end of the ejector plate spring is fixedly connected to the ejector plate, and the other end of the ejector plate spring is fixedly connected to the moving mold system. The ejector body is fixedly connected to the ejector plate, the upper end of the ejector body is inserted into the moving mold system, and the ejector plate and the ejector base plate are fixedly connected by bolts.

[0008] Furthermore, the fixed mold system is provided with a mold frame locking module. One end of the mold frame locking module is connected to the fixed mold system by bolts, and the other end of the mold frame locking module is connected to the moving mold system by bolts.

[0009] Furthermore, the fixed mold system and the moving mold system are each provided with four mold precision positioning devices. The mold precision positioning devices on the fixed mold system are connected to the fixed mold system by bolts, and the mold precision positioning devices on the moving mold system are connected to the moving mold system by bolts. The mold precision positioning groove on the fixed mold system has the same shape as the mold precision positioning protrusion on the moving mold system.

[0010] Beneficial effects:

[0011] This invention provides an injection mold for U-shaped lampshades, offering the following advantages: Through its structural design, during injection molding, the plastic material is heated and melted by the injection molding machine and injected into the hot runner sleeve of this device. After the temperature is adjusted by the hot runner device connected to the hot runner socket, the material flows along the bidirectional runner into the mold cores on both sides of the bidirectional runner, which consist of an upper mold core, side mold cores, a lower mold core, and a lower mold insert. During the molding process of the product body, a matte texture layer on the inner side of the upper mold core and side mold cores creates a matte surface on the product body. During demolding, the ejector pin system separates the fixed mold system from the moving mold system. During separation, the fixed mold system moves the upper mold core, the pressure guide block, and the wear-resistant slider block. The moving mold system drives the lower mold core to move. At this time, the slider spring pushes the slider seat to slide obliquely along the direction of the slider guide post. The movement of the slider seat drives the side mold core to open. At the same time, the ejector system separates the product body and the residue in the bidirectional channel from the mold core. After the product body is demolded, it can be taken out. Compared with the prior art, this utility model can directly form a matte surface on the surface during the injection molding process of the product body. There is no need for the product body to be demolded and then processed by additional equipment to form a matte surface. This reduces the production time and labor costs, avoids the introduction of new errors or defects due to secondary processing, and avoids the situation that affects the quality and consistency of the final product, thus improving the quality of the product body. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of an injection mold for a U-shaped lampshade according to the present invention;

[0013] Figure 2 This is an exploded structural diagram of an injection mold for a U-shaped lampshade as described in this utility model;

[0014] Figure 3 This is a schematic diagram of the internal structure of an injection mold for a U-shaped lampshade, as described in this utility model.

[0015] In the diagram, 1. Hot runner socket; 2. Fixed mold system; 3. Moving mold system; 4. Ejector pin system; 5. Upper mold core; 6. Matte texture layer; 7. Hot runner sleeve; 8. Slider wear block; 9. Slider seat; 10. Slider spring; 11. Slider inclined guide post; 12. Pressure guide block; 13. Side mold core; 14. Lower mold core; 15. Two-way runner; 16. Lower mold insert; 17. Product body; 18. Mold base locking module; 19. Mold precision positioning; 201. Mold 202. Fixed mold; 203. Fixed mold guide sleeve; 204. Mold panel; 205. Mold heat insulation plate; 206. Mold positioning ring; 307. Moving mold plate; 308. Moving mold guide pillar; 309. Mold square iron; 300. Mold base plate; 300. Mold support pillar; 301. Ejector plate guide pillar; 302. Ejector plate guide sleeve; 403. Ejector plate spring; 404. Ejector body; 405. Ejector base plate. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] In the description of this utility model, it should be noted that the terms "upper / lower end," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "set / set up," "sleeve," "connection," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] Please see Figure 1-3This utility model provides a technical solution: an injection mold for a U-shaped lampshade, comprising a hot runner socket 1, a fixed mold system 2, a moving mold system 3, an ejector pin system 4, an upper mold core 5, a matte texture layer 6, a hot runner sleeve 7, a slider wear-resistant block 8, a slider seat 9, a slider spring 10, a slider inclined guide post 11, a pressure guide block 12, a side mold core 13, a lower mold core 14, a bidirectional runner 15, a lower mold insert 16, and a product body 17. The hot runner socket 1 is installed on the fixed mold system 2, the upper mold core 5 is installed on the fixed mold system 2, the upper mold core 5 has a matte texture layer 6, the hot runner sleeve 7 is installed at the center of the fixed mold system 2, the slider wear-resistant block 8 is fixedly connected to the fixed mold system 2 by bolts, and the slider seat 9 slides against the slider wear-resistant block 8. The sliding connection is as follows: the slider spring 10 is located inside the slider seat 9 and is fixedly connected to the slider seat 9; the slider spring 10 is fitted onto the slider inclined guide post 11; one end of the slider inclined guide post 11 is located inside the slider seat 9; the other end of the slider inclined guide post 11 is fixedly connected to the pressure guide block 12; the pressure guide block 12 is fixedly connected to the fixed mold system 2 by bolts; the slider seat 9 is fixedly connected to the side mold core 13 by bolts; the side mold core 13 has a matte texture layer 6; the lower mold core 14 is installed on the moving mold system 3; the lower mold core 14 has a bidirectional track 15; the lower mold insert 16 is installed on the lower mold core 14; the product body 17 is located on the lower mold insert 16; the moving mold system 3 is slidably installed below the fixed mold system 2; and the ejector pin system 4 is installed below the moving mold system 3.

[0020] In this utility model, the fixed mold system 2 includes a fixed mold 201, a fixed mold guide sleeve 202, a mold panel 203, a mold heat insulation plate 204, and a mold positioning ring 205. A fixed mold guide sleeve 202 is fixedly connected to each of the four lower corners of the fixed mold 201. The fixed mold 201 is fixedly connected to the slider wear-resistant block 8 by bolts. The hot runner socket 1 is inserted into the side of the fixed mold 201. The mold panel 203 is fixedly connected to the fixed mold 201 by bolts. The mold heat insulation plate 204 is fixedly connected to the mold panel 205. 03 The mold positioning ring 205 is fixedly connected to the mold heat insulation plate 204 by bolts. The mold positioning ring 205 is fixedly connected to the hot runner sleeve 7. The mold fixed mold 201 is connected to the upper mold core 5. The fixed mold guide sleeve 202 cooperates with the moving mold system 3 to guide the direction of the moving mold system 3 when it moves. The mold panel 203 and the mold heat insulation plate 204 reduce the heat transfer from the hot runner part to other parts and maintain temperature stability. The mold positioning ring 205 ensures the accurate positioning of the mold on the injection molding machine.

[0021] In this utility model, the moving mold system 3 includes a moving mold template 301, moving mold guide pillars 302, mold square iron 303, mold base plate 304, mold support pillars 305, ejector plate guide pillars 306, and ejector plate guide sleeves 307. Each of the four corners of the moving mold template 301 is fixedly connected to a moving mold guide pillar 302. The moving mold guide pillars 302 are slidably installed within the fixed mold system 2. The moving mold template 301 is fixedly connected to the lower mold core 14 by bolts. The lower part of the moving mold template 301 is fixedly connected to the mold square iron 303. The bottom of the mold square iron 303 is fixedly connected to the mold base plate 304. The mold base plate 304 is fixedly connected to one end of the mold support pillar 305. The mold support pillar 305 passes through the ejector system 4, and the other end of the mold support pillar 305 is connected to the moving mold template. 301 is fixedly connected. The bottom of the ejector plate guide post 306 is fixedly connected to the mold base plate 304 by bolts. The top of the ejector plate guide post 306 is fixedly connected to the moving mold plate 301. The ejector plate guide sleeve 307 is slidably fitted on the ejector plate guide post 306. The ejector plate guide sleeve 307 is installed on the ejector system 4 and connected to the lower mold core 14 through the moving mold plate 301. The moving mold guide post 302 cooperates with the fixed mold system 2 to guide the direction of movement of the moving mold system 3. The mold square iron 303 and the mold base plate 304 form the bottom of the mold and leave space for the movement of the ejector system 4. The ejector support post 305 supports the middle part of the moving mold plate 301. The ejector plate guide post 306 and the ejector plate guide sleeve 307 cooperate to ensure the precise movement of the ejector system 4.

[0022] In this utility model, the ejector system 4 includes an ejector panel 401, an ejector plate return pin 402, an ejector plate spring 403, an ejector body 404, and an ejector base plate 405. The ejector panel 401 is fixedly connected to the ejector plate return pin 402. The ejector plate return pin 402 passes through the moving mold system 3 and is fixedly connected to the fixed mold system 2 by bolts. One end of the ejector plate spring 403 is fixedly connected to the ejector panel 401, and the other end of the ejector plate spring 403 is fixedly connected to the moving mold system 3. The ejector body 404 and the ejector plate... Plate 401 is fixedly connected, and the upper end of ejector body 404 is inserted into moving mold system 3. Ejector plate 401 and ejector base plate 405 are fixedly connected by bolts. Ejector plate 401 and ejector base plate 405 support the movement of ejector plate return pin 402, ejector plate spring 403 and ejector body 404. Ejector plate return pin 402 and ejector plate spring 403 cooperate to help ejector plate 401 and ejector base plate 405 reset. Ejector body 404 is used to push the molded product body 17 out of the mold.

[0023] In this utility model, the fixed mold system 2 is provided with a mold frame locking module 18. One end of the mold frame locking module 18 is connected to the fixed mold system 2 by bolts, and the other end of the mold frame locking module 18 is connected to the moving mold system 3 by bolts. The fixed mold system 2 and the moving mold system 3 are connected together by the mold frame locking module 18.

[0024] In this utility model, four mold precision positioning 19s are respectively provided on the fixed mold system 2 and the moving mold system 3. The mold precision positioning 19s on the fixed mold system 2 are connected to the fixed mold system 2 by bolts, and the mold precision positioning 19s on the moving mold system 3 are connected to the moving mold system 3 by bolts. The groove part of the mold precision positioning 19 on the fixed mold system 2 and the protrusion part of the mold precision positioning 19 on the moving mold system 3 have the same shape. The mold precision positioning 19s on the fixed mold system 2 and the moving mold system 3 make the positioning of the fixed mold system 2 and the moving mold system 3 more accurate when they are closed.

[0025] Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires, and should select appropriate controllers according to actual conditions to meet control requirements. The specific connection and control sequence should refer to the working principle described below, where the electrical connections between the various electrical components are completed in sequence. The detailed connection methods are well-known technologies in the field. The following mainly introduces the working principle and process, and will not describe the electrical control further.

[0026] In this embodiment: the fixed mold system 2 and the moving mold system 3 are connected together by the mold base locking module 18. During injection molding, the injection molding machine is aligned with the mold positioning ring 205. The plastic material is heated and melted by the injection molding machine and injected into the hot runner sleeve 7 of this device. After the temperature is adjusted by the hot runner device connected to the hot runner socket 1, it flows along the direction of the bidirectional runner 15 into the mold cores on both sides of the bidirectional runner 15, which are composed of the upper mold core 5, the side mold core 13, the lower mold core 14, and the lower mold insert 16. The mold heat insulation plate 204 reduces the heat from the hot runner section. The temperature is transferred to other parts to maintain stability. The mold panel 203 is installed between the mold heat insulation plate 204 and the mold fixed mold 201. During the molding process of the product body 17, it is shaped by the matte texture layer 6 on the inner side of the upper mold core 5 and the side mold core 13, so that the surface of the product body 17 forms a matte surface. The mold base plate 304 supports the middle part of the moving mold plate 301 with the mold support column 305. During demolding, the mold fixed mold 201 and the moving mold plate 301 are separated. The moving mold plate 301 drives the moving mold guide column 302 along the mold plate 301. When the fixed mold guide sleeve 202 slides, the fixed mold 201 drives the upper mold core 5, the pressure guide block 12, and the slider wear-resistant block 8 to move during separation. The moving mold platen 301 drives the lower mold core 14 to move. At this time, the slider spring 10 pushes the slider seat 9 to slide obliquely along the direction of the slider inclined guide post 11. The movement of the slider seat 9 drives the side mold core 13 to open. Then, the ejector base plate 405 is driven to move between the mold square irons 303. The movement of the ejector base plate 405 drives the ejector plate 401 to slide along the ejector plate guide post 306. The ejector plate guide sleeve 307 and the ejector pin... The guide post 306 works together to ensure the precise movement of the ejector plate 401 and the ejector base plate 405. The movement of the ejector base plate 405 drives the ejector plate return pin 402 and the ejector body 404 to move and squeeze the ejector plate spring 403. The ejector body 404 separates the product body 17 and the residue in the bidirectional track 15 from the mold core. After the product body 17 is demolded, it can be taken out. The mold precision positioning 19 on the fixed mold system 2 and the moving mold system 3 makes the positioning of the fixed mold system 2 and the moving mold system 3 more accurate when they are closed.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An injection mold for a U-shaped lampshade, comprising a hot runner socket (1), a fixed mold system (2), a moving mold system (3), an ejector pin system (4), an upper mold core (5), a matte texture layer (6), a hot runner sleeve (7), a slider wear-resistant block (8), a slider seat (9), a slider spring (10), a slider inclined guide post (11), a pressure guide block (12), a side mold core (13), a lower mold core (14), a bidirectional runner (15), a lower mold insert (16), and a product body (17), characterized in that, The hot runner socket (1) is installed on the fixed mold system (2), the upper mold core (5) is installed on the fixed mold system (2), the upper mold core (5) has a matte texture layer (6), the hot runner sleeve (7) is installed at the center of the fixed mold system (2), the slider wear block (8) is fixedly connected to the fixed mold system (2) by bolts, the slider seat (9) is slidably connected to the slider wear block (8), the slider spring (10) is located inside the slider seat (9) and fixedly connected to the slider seat (9), the slider spring (10) is fitted on the slider inclined guide post (11), one end of the slider inclined guide post (11) is located inside the slider seat (9), the slider inclined guide post (11) 1) The other end is fixedly connected to the pressure guide block (12), the pressure guide block (12) is fixedly connected to the fixed mold system (2) by bolts, the slider seat (9) is fixedly connected to the side mold core (13) by bolts, the side mold core (13) has a matte texture layer (6), the lower mold core (14) is installed on the moving mold system (3), the lower mold core (14) has a bidirectional track (15), the lower mold insert (16) is installed on the lower mold core (14), the product body (17) is located on the lower mold insert (16), the moving mold system (3) is slidably installed below the fixed mold system (2), and the ejector pin system (4) is installed below the moving mold system (3).

2. The injection mold for a U-shaped lampshade according to claim 1, characterized in that, The fixed mold system (2) includes a fixed mold (201), a fixed mold guide sleeve (202), a mold panel (203), a mold heat insulation plate (204), and a mold positioning ring (205). The fixed mold (201) is fixedly connected to a fixed mold guide sleeve (202) at each of its four lower corners. The fixed mold (201) is fixedly connected to the slider wear block (8) by bolts. The hot runner socket (1) is inserted into the side of the fixed mold (201). The mold panel (203) is fixedly connected to the fixed mold (201) by bolts. The mold heat insulation plate (204) is fixedly connected to the mold panel (203) by bolts. The mold positioning ring (205) is fixedly connected to the mold heat insulation plate (204) and the hot runner sleeve (7).

3. The injection mold for a U-shaped lampshade according to claim 1, characterized in that, The moving mold system (3) includes a moving mold template (301), moving mold guide pillars (302), mold square iron (303), mold base plate (304), mold support pillars (305), ejector plate guide pillars (306), and ejector plate guide sleeves (307). Each of the four corners of the moving mold template (301) is fixedly connected to a moving mold guide pillar (302). The moving mold guide pillars (302) are slidably installed within the fixed mold system (2). The moving mold template (301) is fixedly connected to the lower mold core (14) by bolts. The lower part of the moving mold template (301) is fixedly connected to the mold square iron (303). The bottom of the mold square iron (303)... The part is fixedly connected to the mold base plate (304), the mold base plate (304) is fixedly connected to one end of the mold support column (305), the mold support column (305) passes through the ejector system (4), the other end of the mold support column (305) is fixedly connected to the moving mold template (301), the bottom of the ejector plate guide column (306) is fixedly connected to the mold base plate (304) by bolts, the top of the ejector plate guide column (306) is fixedly connected to the moving mold template (301), the ejector plate guide sleeve (307) is slidably fitted on the ejector plate guide column (306), and the ejector plate guide sleeve (307) is installed on the ejector system (4).

4. The injection mold for a U-shaped lampshade according to claim 1, characterized in that, The ejector system (4) includes an ejector panel (401), an ejector plate return pin (402), an ejector plate spring (403), an ejector body (404), and an ejector base plate (405). The ejector panel (401) is fixedly connected to the ejector plate return pin (402). The ejector plate return pin (402) passes through the moving mold system (3) and is fixedly connected to the fixed mold system (2) by bolts. One end of the ejector plate spring (403) is fixedly connected to the ejector panel (401), and the other end of the ejector plate spring (403) is fixedly connected to the moving mold system (3). The ejector body (404) is fixedly connected to the ejector panel (401), and the upper end of the ejector body (404) is inserted into the moving mold system (3). The ejector panel (401) and the ejector base plate (405) are fixedly connected by bolts.

5. The injection mold for a U-shaped lampshade according to claim 1, characterized in that, The fixed mold system (2) is provided with a mold frame locking module (18). One end of the mold frame locking module (18) is connected to the fixed mold system (2) by bolts, and the other end of the mold frame locking module (18) is connected to the moving mold system (3) by bolts.

6. The injection mold for a U-shaped lampshade according to claim 1, characterized in that, The fixed mold system (2) and the moving mold system (3) are respectively provided with four mold precision positioning (19). The mold precision positioning (19) on the fixed mold system (2) is connected to the fixed mold system (2) by bolts. The mold precision positioning (19) on the moving mold system (3) is connected to the moving mold system (3) by bolts. The groove part of the mold precision positioning (19) on the fixed mold system (2) has the same shape as the protrusion part of the mold precision positioning (19) on the moving mold system (3).

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