Injection mold with auxiliary mold core replacement structure

Abstract

The present invention discloses an injection mold with an auxiliary mold core replacement structure, which specifically relates to the field of molding and connection of segmented plastic mold cores, including a mold frame structure composed of multiple spliced ​​combinations, wherein the multiple mold frame structures are spliced ​​through an external frame positioning structure, and each segment of the mold frame structure includes a segmented mold frame 1 and a segmented mold frame 2, wherein mold core positioning cavities are provided in the segmented mold frame 1 and the segmented mold frame 2, and prefabricated transverse grooves are provided at the top and bottom edges of the segmented mold frame 1 and the segmented mold frame 2, and prefabricated longitudinal grooves are provided at the corners of the segmented mold frame 1 and the segmented mold frame 2, and the external frame positioning structure includes a transverse axis positioning frame 1 and a transverse axis positioning frame 2. By dividing the mold into multiple layers from top to bottom, and each layer of the mold is formed into a left and right opening and closing shape through the external frame positioning structure, the function of adjusting the mold core in layers is realized, which improves the convenience of replacing and processing the mold core on the one hand, and reduces the cost of replacing the mold core on the other hand.

Description

Technical Field

[0001] The invention relates to the technical field of molding and connecting segmented plastic mold cores, and more specifically, to an injection mold with an auxiliary mold core replacement structure. Background Art

[0002] The mold core is an important part of the mold. It is usually placed in the mold and is in direct contact with the processed material and is responsible for forming.

[0003] The reasons why the mold core is inconvenient to adjust and replace mainly include the following aspects: First, the mold core is the core component of the mold. Its shape, size and structure directly affect the molding effect of the product. Therefore, it usually needs to be precisely calculated and processed during design and manufacturing to make it fully match the product requirements. Secondly, the mold core of the mold usually cooperates closely with other parts, such as the mold seat, guide column, etc. Adjusting or replacing the mold core may require corresponding adjustments to these accessories, which increases the complexity and cost of the operation. Moreover, the adjustment and replacement of the mold requires professional technical and equipment support, including precise measuring tools and processing equipment, which may be difficult for general manufacturers to easily achieve. In addition, frequent adjustment and replacement of the mold core may increase the downtime of the production line and affect production efficiency and capacity;

[0004] The mold core is inconvenient to replace mainly because the mold core and other parts of the mold are usually designed and manufactured as an integrated whole and cannot be disassembled or replaced independently. This design makes it impossible to replace or adjust the mold core of the one-piece mold as easily as a detachable mold. Therefore, once the design and manufacture of the mold are determined, it is difficult to replace the mold core alone. Usually, the entire mold needs to be redesigned and manufactured to achieve the replacement of the mold core, which increases the cost and complexity of replacing the mold core. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides an injection mold with an auxiliary mold core replacement structure, which divides the mold into multiple layers from top to bottom, and each layer of the mold is formed into a left and right opening and closing shape through an external frame positioning structure to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: an injection mold with an auxiliary mold core replacement structure, including a mold base structure composed of multiple spliced parts. The multiple mold base structures are spliced through an outer frame positioning structure. Each mold base structure includes a segmented mold base one and a segmented mold base two. Mold core positioning cavities are provided in the segmented mold base one and the segmented mold base two. Prefabricated horizontal grooves are provided at the top and bottom edges of the segmented mold base one and the segmented mold base two. Prefabricated vertical grooves are provided at the corners of the segmented mold base one and the segmented mold base two. The outer frame positioning structure includes a horizontal axis positioning frame one and a horizontal axis positioning frame two. The horizontal axis positioning frame one is installed at the edge of the segmented mold base one through the prefabricated horizontal groove. The horizontal axis positioning frame two is installed at the edge of the segmented mold base two through the prefabricated horizontal groove. The cross-sections of the horizontal axis positioning frame one and the horizontal axis positioning frame two are arranged in a "C" shape. Vertical axis corner positioning arms are fixedly installed at the corners of the horizontal axis positioning frame one and the horizontal axis positioning frame two. The vertical axis corner positioning arms are inserted into the inner cavity of the prefabricated vertical groove;

[0007] One side interface of the horizontal axis positioning frame one and the horizontal axis positioning frame two is hinged through a spring hinge. Positioning cantilevers are fixedly installed at the two hinge plates of the spring hinge. One end of the positioning cantilever away from the spring hinge is fixedly installed on the outer wall of the vertical axis corner positioning arm.

[0008] In a preferred embodiment, longitudinal rod positioning grooves are provided in a penetrating manner at the corners of the segmented mold base one and the segmented mold base two. The longitudinal rod positioning grooves are used to combine multiple mold base structures.

[0009] In a preferred embodiment, multiple groups of air cavity grooves one are provided in a penetrating manner inside the segmented mold base one. Multiple groups of air cavity grooves five are provided in a penetrating manner inside the segmented mold base two. After the segmented mold base one and the segmented mold base two are combined, the air cavity grooves one and the air cavity grooves five are communicated with each other.

[0010] In a preferred embodiment, a sliding cylinder section is slidably connected to the inner cavity of the air cavity groove one. A track slider is fixedly installed on the outer wall of the sliding cylinder section. Multiple track notches are provided on the inner cavity side wall of the air cavity groove one. The number of the track notches is the same as that of the track sliders. The track slider is slidably connected to the inner cavity of the track notch;

[0011] An air cavity groove three is provided inside the slide section, and the inner cavity of the air cavity groove three is rotatably connected to a positioning roller shaft section through a bearing, and a propulsion type spiral groove is provided on the outer wall of the positioning roller shaft section, and a plurality of propulsion type end heads are fixedly installed on the inner wall of the slide section, and the propulsion type spiral groove is meshed with the propulsion type end heads, and a spiral tooth groove one is provided inside the segmented mold frame one, and the spiral tooth groove one is communicated with the air cavity groove one, and a spiral tooth is fixedly installed on the end of the positioning roller shaft section, and the spiral tooth is meshed with the spiral tooth groove one, and a spiral tooth groove two is provided in the segmented mold frame two, and the end pitch of the spiral tooth groove two is consistent with the pitch of the spiral tooth, and the end pitch of the spiral tooth groove two is greater than the pitch of the spiral tooth.

[0012] In a preferred embodiment, a supporting end head for separating the spiral teeth is fixedly mounted at the end of the middle chamber of the second spiral tooth groove, and the end of the supporting end head is arranged in an arc-shaped structure.

[0013] In a preferred embodiment, a transverse through groove is provided inside the supporting end head, the transverse through groove is connected with the air cavity groove five, an exhaust groove is provided at the end of the air cavity groove five in a connected state, the exhaust groove is provided on the side of the segmented mold frame two, an air cavity groove two is provided at the end of the slide section, the air cavity groove one, the air cavity groove two and the air cavity groove three are connected, an air cavity groove four is provided inside the positioning roller shaft section, the air cavity groove three is connected with the air cavity groove four, an air inlet slot is provided on the side of the segmented mold frame one, and the air inlet slot is connected with the air cavity slot one;

[0014] The air intake notch is used for connecting an air intake pipeline.

[0015] In a preferred embodiment, a deformation segment is fixedly installed at the end of the positioning roller shaft segment, the deformation segment is fixedly connected to the spiral teeth, the deformation segment is arranged in a hollow cylindrical structure, and the air cavity groove four is connected to the deformation segment.

[0016] In a preferred embodiment, a one-way air intake structure is installed at the end of the deformation section and one side of the air cavity groove 2, and the one-way air intake structure includes a conical sealing block and a tension spring member. A conical notch is opened at the end of the deformation section and one side of the air cavity groove 2, and the tension spring member is fixedly installed on the inner wall of the conical notch. The conical sealing block is fixedly connected to the tension spring member, and the conical sealing block is sealed and clamped in the inner cavity of the conical notch, and the inner wall cross-section of the conical notch is consistent with the outer wall cross-section of the conical sealing block.

[0017] In a preferred embodiment, the helical teeth are made of nickel-titanium memory alloy, and the helical teeth have a critical memory temperature of the memory metal.

[0018] In a preferred embodiment, the pitch of the helical teeth at a temperature lower than the critical memory temperature of the memory metal is A1, and the pitch of the helical teeth at a temperature higher than the critical memory temperature of the memory metal is A2, and the value of A2 is greater than the value of A1.

[0019] Technical effects and advantages of the present invention:

[0020] This solution divides the mold into multiple layers from top to bottom, and each layer of the mold is opened and closed left and right through the outer frame positioning structure, so as to achieve the function of layered adjustment of the mold core. On the one hand, it improves the convenience of replacing and processing the mold core, and on the other hand, it reduces the cost of mold core replacement;

[0021] The processing temperature of the mold core is controlled by internal air intake. Different from overall heating, internal air intake heating can achieve temperature gradients, so that different mold cores and different mold core positions have more suitable processing temperatures.

[0022] Through the memory metal structure of the spiral teeth, the higher the temperature, the tighter the nodes of the spiral teeth are clamped, which improves the tightness of each position during the processing of the mold plastic solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of embodiment 1 of the present invention.

[0024] Figure 2 It is a schematic diagram of the structure of the mold frame structure and the outer frame positioning structure of the first embodiment of the present invention.

[0025] Figure 3 It is a schematic diagram of the bottom structure of the mold frame structure and the outer frame positioning structure of the first embodiment of the present invention.

[0026] Figure 4 This is a cross-sectional view of the mold frame structure of the second embodiment of the present invention.

[0027] Figure 5 For the present invention Figure 4 A-section structure enlarged view.

[0028] Figure 6 It is a partial structural cross-sectional view of a segmented mold frame according to the second embodiment of the present invention.

[0029] Figure 7 For the present invention Figure 6 Enlarged view of the structure of part B.

[0030] Figure 8 For the present invention Figure 6 Enlarged view of the C structure.

[0031] Fig. 9 For the present invention Figure 6 Enlarged view of the D structure.

[0032] Fig.10 It is a schematic structural diagram of the positioning roller shaft segment and the spiral teeth of the present invention.

[0033] The accompanying drawings are marked as: 1 mold frame structure, 101 segmented mold frame one, 102 segmented mold frame two, 103 mold core positioning cavity, 104 prefabricated transverse groove, 105 prefabricated longitudinal groove, 106 longitudinal rod positioning groove, 2 outer frame positioning structure, 201 transverse axis positioning frame one, 202 transverse axis positioning frame two, 203 longitudinal axis angle positioning arm, 204 spring hinge, 205 positioning cantilever, 3 air cavity groove one, 4 slide section, 5 track groove, 6 track slider, 7 air cavity groove two, 8 air cavity groove three, 9 positioning roller section, 10 push-type spiral groove, 11 push-type end, 12 air cavity groove four, 13 spiral tooth groove one, 14 spiral teeth, 15 spiral tooth groove two, 16 support type end, 17 air cavity groove five, 18 exhaust groove, 19 air inlet groove, 20 conical groove, 21 conical sealing block, 22 tension spring member, 23 deformation section. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1: Refer to the attached specification Figure 1-3, an injection mold with an auxiliary mold core replacement structure according to an embodiment of the present invention includes a plurality of spliced mold base structures 1. The plurality of mold base structures 1 are spliced through an outer frame positioning structure 2. Each mold base structure 1 includes a segmented mold base one 101 and a segmented mold base two 102. A mold core positioning cavity 103 is provided in the segmented mold base one 101 and the segmented mold base two 102. Prefabricated horizontal grooves 104 are provided at the top and bottom edges of the segmented mold base one 101 and the segmented mold base two 102. Prefabricated vertical grooves 105 are provided at the corners of the segmented mold base one 101 and the segmented mold base two 102. In addition, prefabricated vertical grooves 105 are provided above and below the corners of the segmented mold base two 102 and the segmented mold base one 101 for inserting a plurality of vertical axis corner positioning arms 203. The outer frame positioning structure 2 includes a horizontal axis positioning frame one 201 and a horizontal axis positioning frame two 202. The horizontal axis positioning frame one 201 is installed at the edge of the segmented mold base one 101 through the prefabricated horizontal groove 104. The horizontal axis positioning frame two 202 is installed at the edge of the segmented mold base two 102 through the prefabricated horizontal groove 104. The cross-sections of the horizontal axis positioning frame one 201 and the horizontal axis positioning frame two 202 are arranged in a "C" shape. Vertical axis corner positioning arms 203 are fixedly installed at the corners of the horizontal axis positioning frame one 201 and the horizontal axis positioning frame two 202. The vertical axis corner positioning arms 203 are inserted into the inner cavity of the prefabricated vertical groove 105;

[0036] As Figure 2 shown, one side interface of the horizontal axis positioning frame one 201 and the horizontal axis positioning frame two 202 is hinged through a spring hinge 204. Positioning cantilevers 205 are fixedly installed at the two hinge plates of the spring hinge 204. One end of the positioning cantilever 205 away from the spring hinge 204 is fixedly installed on the outer wall of the vertical axis corner positioning arm 203. The structural form of the spring hinge 204 can be understood as a torsion spring hinge or a spring hinge for increasing strength, etc. The hinge includes two connecting plates. The hinge plates in this solution are the connecting plates;

[0037] As Figure 1-2 shown, a longitudinal rod positioning groove 106 is provided in a penetrating manner at the corners of the segmented mold base one 101 and the segmented mold base two 102. The longitudinal rod positioning groove 106 is used to combine a plurality of mold base structures 1. The structure inserted into the inner cavity of the longitudinal rod positioning groove 106 includes a lead screw or a rod-shaped bolt member, and its function is to fix multiple groups of mold base structures 1;

[0038] It should be noted that the mold core of an integrated mold is inconvenient to replace mainly because the mold core and other parts of the mold are usually designed and manufactured in an integrated manner and cannot be disassembled or replaced independently. However, in this solution, the mold is first divided into multiple layers from top to bottom, and at the same time, each layer of the mold is formed into a left and right opening and closing shape through an external frame positioning structure 2, thereby realizing the function of layered adjustment of the mold core. The mold core is installed at the position of the mold core positioning cavity 103 in this solution, and the longitudinal rod positioning groove 106 is used for final bolt fixing after the mold core adjustment is completed.

[0039] Embodiment 2: As a technical solution for molding and connecting a plastic mold core, Figure 4 As shown, the second embodiment is a solution based on the first embodiment, wherein a plurality of air cavity grooves 1 3 are provided in a through-shaped manner inside the first segmented mold frame 101, and a plurality of air cavity grooves 5 17 are provided in a through-shaped manner inside the second segmented mold frame 102;

[0040] It should be noted that: after the segmented mold frame 1 101 is combined with the segmented mold frame 2 102, the air cavity groove 1 3 is connected with the air cavity groove 5 17. After the connection, the mold core processing temperature is controlled by internal air intake. Different from the overall heating, the internal air intake heating can achieve a temperature gradient, so that different mold cores and different mold core positions have a more suitable processing temperature.

[0041] As a further solution based on the second embodiment, Figure 4-10 As shown, a slide barrel section 4 is slidably connected to the inner cavity of the air cavity groove 1 3, a track slider 6 is fixedly installed on the outer wall of the slide barrel section 4, a plurality of track slots 5 are opened on the inner cavity side wall of the air cavity groove 1 3, the number of the track slots 5 is consistent with that of the track slider 6, the track slider 6 is slidably connected to the inner cavity of the track slot 5, wherein the slide barrel section 4 is slidably connected to the inner cavity of the air cavity groove 1 3 through the track slider 6;

[0042] An air cavity groove 3 8 is provided inside the slide cylinder section 4, and the inner cavity of the air cavity groove 3 8 is rotatably connected to a positioning roller shaft section 9 through a bearing. Figure 6As shown, the outer ring of the bearing is fixed in the inner cavity of the air cavity groove 3, the positioning roller segment 9 is fixed to the inner ring of the bearing, and the positioning roller segment 9 can realize the in-situ fixed-point rotation after being pushed by other forces, the outer wall of the positioning roller segment 9 is provided with a propulsion type spiral groove 10, and the inner wall of the slide section 4 is fixedly installed with a plurality of propulsion type end heads 11, the propulsion type spiral groove 10 is meshed with the propulsion type end heads 11, the interior of the segmented mold frame 101 is provided with a spiral tooth groove 13, the spiral tooth groove 13 is connected with the air cavity groove 3, the end of the positioning roller segment 9 is fixedly installed with a spiral tooth 14, the spiral tooth 14 is meshed with the spiral tooth groove 13, the segmented mold frame 2 102 is provided with a spiral tooth groove 2 15, the end pitch of the spiral tooth groove 2 15 is consistent with the pitch of the spiral tooth 14, the end pitch of the spiral tooth groove 2 15 is greater than the pitch of the spiral tooth 14, wherein the end pitch of the spiral tooth 14 is the same as the end pitch;

[0043] It should be noted that: after the segmented mold frame 101 and the segmented mold frame 2 102 are assembled and installed, injection molding is performed. Since different mold cores at different positions of the molded part require different processing temperatures, different processing temperatures are achieved by stamping and inletting air into the air cavity groove 13 at different positions and different intake temperatures.

[0044] In addition, during the process of air intake in the air cavity groove 13, due to the limitation of the track slider 6, the slide barrel section 4 slides back and forth laterally. Since the positioning roller shaft section 9 is connected to the inner cavity of the air cavity groove 13 through the bearing rotation, the positioning roller shaft section 9 can only rotate and cannot move back and forth. When the slide barrel section 4 pushes the propulsion type spiral groove 10 forward through the propulsion type end head 11, the positioning roller shaft section 9 generates a rotation state with the help of the thrust of the propulsion type end head 11 and the spiral trajectory of the propulsion type spiral groove 10. Since the segmented mold frame 101 and the segmented mold frame 2 102 are in a combined state, the spiral tooth 14 is deformed at the position close to the positioning roller shaft section 9, and the other end of the spiral tooth 14 is screwed into the inner cavity of the spiral tooth groove 2 15. In addition, since the pitch of the spiral tooth groove 2 15 is gradually increased, the spiral tooth 14 is used as a fastener. On the one hand, it can prevent falling off, and on the other hand, it can reduce the gap between the segmented mold frame 101 and the segmented mold frame 2 102.

[0045] Likewise, in the process of evacuating the air chamber groove 3, the slide cylinder section 4 moves in the reverse direction, so that the spiral teeth 14 return to their original positions;

[0046] The present solution adopts a pneumatic transmission method, on the one hand to facilitate the temperature control of the mold core processing and molding, and on the other hand, different from the traditional electric drill and bolt fastening solution, the present solution is more convenient to adjust after injection molding, because the segmented mold frame 1 101 and the segmented mold frame 2 102 can be fastened while controlling the temperature.

[0047] As a fastening scheme for the segmented mold frame 101 and the segmented mold frame 2 102 in the mold core processing, Figure 4-6 As shown, a support-type end head 16 for separating the spiral teeth 14 is fixedly installed at the end of the middle chamber of the spiral tooth groove 15, and the end of the support-type end head 16 is arranged in an arc-shaped structure. Since the pitch of the spiral tooth groove 15 is gradually increased, and the pitch of the spiral teeth 14 in this scheme is equidistant, in order to prevent the spiral teeth 14 from shrinking toward the center after stretching, the arrangement of the support-type end head 16 can better push the spiral teeth 14 into the end of the spiral tooth groove 15 from the inside to the outside;

[0048] like Figure 4-10 As shown, a transverse through groove is provided inside the supporting end 16, and the transverse through groove is connected to the air cavity groove 5 17, and an exhaust groove 18 is provided at the end of the air cavity groove 5 17 in a connected state, and the exhaust groove 18 is provided on the side of the segmented mold frame 2 102, and an air cavity groove 2 7 is provided at the end of the slide section 4, and the air cavity groove 1 3, the air cavity groove 2 7 and the air cavity groove 3 8 are connected, and an air cavity groove 4 12 is provided inside the positioning roller shaft section 9, and the air cavity groove 3 8 is connected to the air cavity groove 4 12, as shown in FIG. Fig. 9 and 10 As shown, the middle part of the spiral tooth 14 is composed of a hollow spring member, and an air inlet slot 19 is opened on the side of the segmented mold frame 101, and the air inlet slot 19 is connected to the air cavity slot 13; the air inlet slot 19 is used to connect the air inlet pipe.

[0049] It should be noted that the purpose of this solution is to allow the interior of the segmented mold frame 1 101 and the segmented mold frame 2 102 to have a complete air inlet and outlet channel during the tightening process with the spiral teeth 14, thereby improving the convenience of temperature control during mold core processing.

[0050] As a further embodiment of the helical tooth 14, Figure 4-10 As shown, a deformation segment 23 is fixedly installed at the end of the positioning roller segment 9, the deformation segment 23 is fixedly connected to the spiral tooth 14, the deformation segment 23 is arranged in a hollow cylindrical structure, and the air cavity groove 12 is connected to the deformation segment 23.

[0051] It should be noted that: when the deformation segment 23 is made of deformable material to connect the positioning roller segment 9 and the spiral tooth 14, the irreversible excessive deformation of the end of the positioning roller segment 9 or the end of the spiral tooth 14 is reduced, and the service life of the spiral tooth 14 and the positioning roller segment 9 is increased. In addition, the material selection of the deformation segment 23 includes but is not limited to silicone rubber, fluororubber, polytetrafluoroethylene, polyimide, etc.; among them, silicone rubber has excellent high temperature resistance, can maintain its elasticity and mechanical properties in a high temperature environment, and it also has good aging resistance, ozone resistance and chemical corrosion resistance; fluororubber Rubber is a special type of rubber material with excellent high temperature resistance and chemical stability. It is not easy to soften or deform at high temperatures, and has good oil resistance and solvent resistance; PTFE is a very stable polymer material with excellent high temperature resistance and chemical stability. It is not easy to melt or decompose at high temperatures, and has good corrosion resistance and low friction coefficient; polyimide is a type of high-performance engineering plastic with excellent high temperature resistance and mechanical properties. It can still maintain its strength and rigidity at high temperatures, and has good corrosion resistance and insulation properties.

[0052] In the one-way air intake scheme of the air cavity groove 13, a one-way air intake structure is installed at the end of the deformation section 23 and one side of the air cavity groove 27, and the one-way air intake structure includes a conical sealing block 21 and a tension spring member 22. A conical slot 20 is opened at the end of the deformation section 23 and one side of the air cavity groove 27. The tension spring member 22 is fixedly installed on the inner wall of the conical slot 20. The number of the tension spring members 22 is set to be multiple, and the multiple tension spring members 22 are arranged in a ring-shaped and equidistant manner. The conical sealing block 21 is fixedly connected to the tension spring member 22, and the conical sealing block 21 is sealed and clamped in the inner cavity of the conical slot 20. The inner wall cross-section of the conical slot 20 is consistent with the outer wall cross-section shape of the conical sealing block 21. In addition, in order to improve the sealing performance, a rubber sealing ring can be set at the outer wall edge of the conical sealing block 21 and the inner wall edge of the conical slot 20.

[0053] It should be noted that: in the present embodiment, the cooperation between the conical sealing block 21 and the tension spring member 22 can form the function of a one-way valve, that is, during the air intake process, the conical sealing block 21 opens, thereby facilitating the air intake to control the mold core processing temperature. During the process of evacuating the air cavity groove 1 3, the conical sealing block 21 is engaged in the inner cavity of the conical notch 20, and the air cavity groove 2 7 is closed, thereby improving the smoothness of the movement of the slide section 4.

[0054] In order to ensure that the joint seams of the molded plastic products are reduced as much as possible, as a further supplementary solution for the mold fastening connection, the spiral teeth 14 are made of nickel-titanium memory alloy, and the spiral teeth 14 have a critical memory temperature of the memory metal, that is, the memory phase transition temperature of the memory metal;

[0055] The pitch of the helical teeth 14 is proposed to be A1 when it is lower than the critical memory temperature of the memory metal, and the pitch of the helical teeth 14 is proposed to be A2 when it is higher than the critical memory temperature of the memory metal. The value of A2 is greater than the value of A1. The specific memory phase transition temperature of the nickel-titanium memory alloy is not disclosed in this scheme, because different mold cores have different processing temperatures. When the helical teeth 14 are made of nickel-titanium memory alloy, different memory phase transition temperatures can be switched according to different use environments to meet different use requirements. The critical memory temperature of the memory metal varies with different materials, mainly depending on its chemical composition and microstructure. Memory metal is a special alloy with shape memory effect and superelastic behavior. Its critical memory temperature refers to the temperature at which the memory metal changes from high temperature and low temperature phases to have shape memory effect, that is, the temperature threshold of the memory metal. It can be understood that the adjustment of the memory phase transition temperature is accompanied by different alloy composition and heat treatment history, and can be adjusted. Adjusting the memory phase transition temperature of the memory metal is a prior art, and this scheme will not be repeated in detail.

[0056] It should be noted that: according to the actual mold core processing temperature, a suitable memory phase change temperature of the spiral tooth 14 is selected, and the memory phase change temperature is set to S. When the gas temperature in the air cavity groove 3 is lower than S, the pitch of the spiral tooth 14 forms an A1 state, which can be understood as normal. At this time, the spiral tooth 14 is more suitable for tightening the segmented mold frame 1 101 and the segmented mold frame 2 102 at room temperature. When the temperature is high, various materials such as the mold are more inclined to the melting point, especially the mold plastic solution, which is more likely to flow into the gap between the segmented mold frame 101 and the segmented mold frame 2 102. When the temperature is high, that is, when the gas temperature in the air cavity groove 3 is higher than S, the pitch of the spiral tooth 14 forms an A2 state, that is, the pitch becomes smaller, thereby improving the tightness of each position during the processing of the mold plastic solution.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An injection mold with an auxiliary mold core replacement structure, comprising a plurality of mold frame structures (1) formed by splicing, wherein the plurality of mold frame structures (1) are spliced ​​together through an external frame positioning structure (2), characterized in that: Each of the mold base structures (1) includes a segmented mold base one (101) and a segmented mold base two (102). A mold core positioning cavity (103) is provided in the segmented mold base one (101) and the segmented mold base two (102). Prefabricated transverse grooves (104) are provided at the top and bottom edges of the segmented mold base one (101) and the segmented mold base two (102). Prefabricated longitudinal grooves (105) are provided at the corners of the segmented mold base one (101) and the segmented mold base two (102). The outer frame positioning structure (2) includes a horizontal axis positioning frame one (201) and a horizontal axis positioning frame two (202). The horizontal axis positioning frame one (201) is installed at the edge of the segmented mold base one (101) through the prefabricated transverse groove (104). The horizontal axis positioning frame two (202) is installed at the edge of the segmented mold base two (102) through the prefabricated transverse groove (104). The cross-sections of the horizontal axis positioning frame one (201) and the horizontal axis positioning frame two (202) are arranged in a "匚" shape. A vertical axis folding angle positioning arm (203) is fixedly installed at the corner of the horizontal axis positioning frame one (201) and the horizontal axis positioning frame two (202). The vertical axis folding angle positioning arm (203) is inserted into the inner cavity of the prefabricated longitudinal groove (105). One side interface of the horizontal axis positioning frame one (201) and the horizontal axis positioning frame two (202) is hinged through a spring hinge (204). Positioning cantilevers (205) are fixedly installed at the two hinge plates of the spring hinge (204). One end of the positioning cantilever (205) far from the spring hinge (204) is fixedly installed on the outer wall of the vertical axis folding angle positioning arm (203).

2. The injection mold with an auxiliary mold core replacement structure according to claim 1, characterized in that: Longitudinal rod body positioning grooves (106) are provided in a penetrating manner at the corners of the segmented mold base one (101) and the segmented mold base two (102). The longitudinal rod body positioning grooves (106) are used to combine multiple mold base structures (1).

3. The injection mold with an auxiliary mold core replacement structure according to claim 2, characterized in that: Multiple groups of air cavity grooves one (3) are provided in a penetrating manner inside the segmented mold base one (101). Multiple groups of air cavity grooves five (17) are provided in a penetrating manner in the inner cavity of the segmented mold base two (102). After the segmented mold base one (101) and the segmented mold base two (102) are combined, the air cavity grooves one (3) are communicated with the air cavity grooves five (17).

4. The injection mold with an auxiliary mold core replacement structure according to claim 3, characterized in that: A sliding cylinder section (4) is slidably connected to the inner cavity of the air cavity groove one (3). A track slider (6) is fixedly installed on the outer wall of the sliding cylinder section (4). Multiple track notches (5) are provided on the inner cavity side wall of the air cavity groove one (3). The number of the track notches (5) is the same as that of the track sliders (6). The track slider (6) is slidably connected to the inner cavity of the track notch (5). The interior of the slide barrel section (4) is provided with an air cavity groove three (8), the inner cavity of the air cavity groove three (8) is rotatably connected to a positioning roller shaft section (9) via a bearing, the outer wall of the positioning roller shaft section (9) is provided with a propulsion type spiral groove (10), the inner wall of the slide barrel section (4) is fixedly provided with a plurality of propulsion type end heads (11), the propulsion type spiral grooves (10) are meshed with the propulsion type end heads (11), and the interior of the segmented mold frame one (101) is provided with a spiral tooth groove one (13) The spiral tooth groove one (13) is connected to the air cavity groove one (3); a spiral tooth (14) is fixedly installed at the end of the positioning roller shaft section (9); the spiral tooth (14) is meshed with the spiral tooth groove one (13); a spiral tooth groove two (15) is provided in the segmented mold frame two (102); the end pitch of the spiral tooth groove two (15) is consistent with the pitch of the spiral tooth (14); and the end pitch of the spiral tooth groove two (15) is greater than the pitch of the spiral tooth (14).

5. The injection mold with an auxiliary mold core replacement structure according to claim 4, characterized in that: A supporting end head (16) for separating the spiral teeth (14) is fixedly mounted at the end of the middle chamber of the second spiral tooth groove (15), and the end of the supporting end head (16) is arranged in an arc-shaped structure.

6. The injection mold with an auxiliary mold core replacement structure according to claim 5, characterized in that: The support-type end head (16) has a transverse through groove inside, the transverse through groove is connected to the air cavity groove five (17), the end of the air cavity groove five (17) is connected to the air exhaust groove (18), the air exhaust groove (18) is arranged on the side of the segmented mold frame two (102), the end of the slide section (4) is provided with an air cavity groove two (7), the air cavity groove one (3), the air cavity groove two (7) and the air cavity groove three (8) are connected, the positioning roller section (9) has an air cavity groove four (12) inside, the air cavity groove three (8) is connected to the air cavity groove four (12), the side of the segmented mold frame one (101) is provided with an air inlet groove (19), the air inlet groove (19) is connected to the air cavity groove one (3); The air intake notch (19) is used for connecting an air intake pipeline.

7. The injection mold with an auxiliary mold core replacement structure according to claim 6, characterized in that: A deformation section (23) is fixedly mounted on the end of the positioning roller shaft section (9), the deformation section (23) is fixedly connected to the spiral tooth (14), the deformation section (23) is arranged in a hollow cylindrical structure, and the air cavity groove four (12) is connected to the deformation section (23).

8. The injection mold with an auxiliary mold core replacement structure according to claim 7, characterized in that: A one-way air intake structure is installed at the end of the deformation section (23) and one side of the air cavity groove (7), and the one-way air intake structure includes a conical sealing block (21) and a tension spring member (22). A conical notch (20) is opened at the end of the deformation section (23) and one side of the air cavity groove (7), and the tension spring member (22) is fixedly installed on the inner wall of the conical notch (20). The conical sealing block (21) is fixedly connected to the tension spring member (22), and the conical sealing block (21) is clamped in the inner cavity of the conical notch (20) in a sealing manner. The inner wall cross-section of the conical notch (20) is consistent with the outer wall cross-section of the conical sealing block (21).

9. The injection mold with an auxiliary mold core replacement structure according to any one of claims 4 to 8, characterized in that: The helical teeth (14) are made of nickel-titanium memory alloy, and the helical teeth (14) have a critical memory temperature of the memory metal.

10. The injection mold with an auxiliary mold core replacement structure according to claim 9, characterized in that: The pitch of the helical teeth (14) when the temperature is lower than the critical memory temperature of the memory metal is A1, and the pitch of the helical teeth (14) when the temperature is higher than the critical memory temperature of the memory metal is A2, and the value of A2 is greater than the value of A1.

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