Cutter assembly for in-mold hot cutting

Abstract

The utility model provides a cutter assembly for in-mold hot cutting, which comprises a cutter holder (1), a cutter (2) mounted on the cutter holder (1) and an ejection return mechanism (3) connected with the cutter holder (1), and the ejection return mechanism (3) ejects the cutter (2) and the cutter holder (1) firstly and then drives the cutter (2) and the cutter holder (1) to return; the ejection return mechanism (3) comprises an ejector rod (31) connected with the tool apron (1) and an elastic element (32) arranged on the ejector rod (31) in a sleeving mode, and a gap is formed between the tool apron (1) and the elastic element (32). The utility model has the advantages of few parts, small size of parts, good stability after assembly, capability of being made into a standard part, good universality, high mold core strength, low replacement cost and simplicity and convenience in installation, effectively solves the problem of cutting failure caused by mold expansion, and is not easy to damage at the colliding and penetrating position of the cutter or the mold core.

Description

Technical Field

[0001] The utility model relates to the technical field of in-mold cutting, in particular to a cutter assembly for in-mold hot cutting. Background Art

[0002] In-mold cutting technology is a mold injection automation technology that uses a cutting knife to shear or squeeze out the gate before the plastic mold is opened, thereby achieving part-material separation after the plastic mold is opened.

[0003] The patent number is ZL201720892181.2, the authorization announcement date is March 13, 2018, and the name is an in-mold cutter assembly. The patent includes a cutter, an extension rod, a cutter seat, and 4 springs set in the cutter seat. The in-mold cutter assembly of the prior art has the following disadvantages: 1. There are a large number of parts; 2. The size of the parts is large and cannot be reduced, and it is easy to interfere with other parts of the mold; 3. The large number of parts leads to reduced precision and poor stability after assembly; 4. It cannot be made into standard parts and has poor versatility; 5. The size of the parts is large, so the hole opened on the mold core is large, which reduces the strength of the mold core; 6. Once the cutter is damaged, the cost of replacing the cutter is high and the installation is more troublesome; 7. The cutting cannot be continued due to mold expansion; 8. Over time, the cutter or the mold core is easily damaged at the penetration position.

[0004] In view of this, there is an urgent need to provide a cutter assembly for in-mold hot cutting to solve the deficiencies of the prior art. Utility Model Content

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the utility model is to provide a cutter assembly for hot cutting in the mold, which has a small number of parts, small size of parts, good stability after assembly, can be made into standard parts, has good versatility, high mold core strength, low replacement cost, simple and convenient installation, and effectively solves the problem of uncutting caused by mold expansion and the problem that the cutter or the mold core is not easily damaged when it penetrates the mold.

[0006] In order to solve the above technical problems, the utility model provides an in-mold hot cutting cutter assembly, which includes a cutter holder, a cutter mounted on the cutter holder, and an ejection and return mechanism connected to the cutter holder, wherein the ejection and return mechanism first ejects the cutter and the cutter holder, and then returns the cutter and the cutter holder.

[0007] A further improvement of the utility model is that the ejection return mechanism comprises an ejector rod connected to the knife seat, and an elastic element sleeved on the ejector rod, and a space is provided between the knife seat and the elastic element.

[0008] A further improvement of the utility model is that the interval is 0.3 to 100 mm.

[0009] A further improvement of the utility model is that the elastic element is a spring or a nitrogen spring.

[0010] A further improvement of the utility model is that the knife seat is provided with a mounting groove, and the cutting knife is mounted in the mounting groove.

[0011] A further improvement of the utility model is that the bottom of the installation groove is a curved surface or an inclined surface or an arc, the side surface of the installation groove is an inclined surface, and a gap is provided between the cutting knife and the side surface of the installation groove.

[0012] A further improvement of the utility model is that the bottom of the installation groove is a plane, and the side surface of the installation groove is a plane.

[0013] A further improvement of the utility model is that a process screw is arranged on the side of the cutter assembly for hot cutting in the mold.

[0014] A further improvement of the utility model is that the knife seat and the cutter are an integrated structure.

[0015] A further improvement of the utility model is that the utility model also includes a driving cylinder and an extension rod. The driving cylinder is installed on the rear mold, and the two ends of the extension rod are respectively in contact with the push rod and the driving cylinder, and the elastic element elastically presses between the rear mold and the push rod.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. The insert has a cutter protection function, which improves the wear resistance of the insert;

[0018] 2. Protect the inserts and penetration positions from damage;

[0019] 3. It can reduce the size of parts to avoid interference with mold parts, have better general performance, and reduce the size of parts to improve the strength of the mold core;

[0020] 4. Effectively improving machining accuracy can effectively provide production stability;

[0021] 5. Effectively solve the problem of mold expansion and poor cutting of products;

[0022] 6. During the production process, the mold often expands between the parting surfaces of the mold, resulting in the nozzle being unable to be cut. Because the cutter needs to completely cut off the nozzle, the cutter must be 0.01-0.05 mm higher than the parting surface. If the cutter and the mold core are pierced for a long time, the cutter or the mold core will often be damaged. Adding inserts, the cutter and the insert are in contact with the mold core at the same time, increasing the contact area, effectively solving the problem of continuous cutting caused by mold expansion and the cutter or mold core being difficult to be damaged at the penetration position;

[0023] 7. The cutter is completely or partially offset and installed on the cutter seat. The oil cylinder is pushed out, the cutter cuts off the water outlet, the elastic element is reset, and the cutter and the insert are in contact with the mold core at the same time. In this way, one spring can be used, and at most two springs can be used, which reduces the number of parts. The size of the parts can be further reduced. According to specific needs, it can be designed into standard parts such as square or round. It has good versatility, the installation hole dug on the mold core becomes smaller, the mold core strength is higher, the cost is lower, the installation is convenient and simple, and the stability is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Is a schematic diagram of a three-dimensional structure of an embodiment of the utility model;

[0025] Figure 2 yes Figure 1 Expand the three-dimensional structure diagram;

[0026] Figure 3 It is a schematic diagram of the three-dimensional structure of the knife holder of an embodiment of the utility model;

[0027] Figure 4 It is a schematic diagram of the three-dimensional structure of the knife holder of the second embodiment of the utility model;

[0028] Figure 5 Is a schematic diagram of the structure of the utility model embodiment of the second knife holder and cutter assembly;

[0029] Figure 6 Is a schematic diagram of the three-dimensional structure of the fourth embodiment of the utility model;

[0030] Figure 7 Is a schematic diagram of the three-dimensional structure of the utility model implementation mode five;

[0031] Figure 8 yes Figure 7 Expand the three-dimensional structure diagram;

[0032] Fig. 9 Is a schematic diagram of the three-dimensional structure of the utility model implementation six;

[0033] Fig.10 Is a schematic diagram of the three-dimensional structure of the utility model embodiment seven;

[0034] Fig.11 Is a schematic diagram of the three-dimensional structure of the utility model embodiment nine;

[0035] Fig.12 Is a schematic diagram of the three-dimensional structure of the utility model embodiment ten;

[0036] Fig.13 yes Fig.12 Expand the three-dimensional structure diagram;

[0037] Fig.14 Is a schematic diagram of the three-dimensional structure of the utility model implementation eleven;

[0038] Fig.15 Is a schematic diagram of the three-dimensional structure of the utility model embodiment twelve;

[0039] Fig.16 Is a schematic diagram of the three-dimensional structure of the knife holder and the cutter of the utility model embodiment thirteen;

[0040] Fig.17 Is a schematic diagram of the structure of the utility model embodiment thirteen knife holder and cutter assembly;

[0041] Fig.18 Is a schematic diagram of the three-dimensional structure of the utility model implementation mode fifteen;

[0042] Fig.19 Is a schematic diagram of the three-dimensional structure of the utility model implementation sixteen;

[0043] Fig. 20 Is a schematic diagram of the three-dimensional structure of the utility model embodiment seventeen;

[0044] Fig.21 Is a schematic diagram of the three-dimensional structure of the eighteenth embodiment of the utility model;

[0045] Fig. 22 It is a schematic diagram of the three-dimensional structure of the nineteenth embodiment of the utility model;

[0046] Fig.23 It is a schematic diagram of the three-dimensional structure of the twenty embodiments of the present utility model;

[0047] Fig.24 It is a schematic diagram of the three-dimensional structure of the twenty-first embodiment of the utility model;

[0048] Fig.25 It is a schematic diagram of the three-dimensional structure of the twenty-sixth embodiment of the utility model;

[0049] Fig.26 It is a schematic diagram of the three-dimensional structure of the twenty-seventh embodiment of the utility model;

[0050] Fig. 27 It is a schematic diagram of the three-dimensional structure of the twenty-eighth embodiment of the utility model;

[0051] Fig.28 It is a schematic diagram of the three-dimensional structure of the twenty-ninth embodiment of the utility model.

[0052] The names of the components in the figure are as follows:

[0053] 1—Tool holder;

[0054] 11—Mounting slot;

[0055] 12—Technology steps;

[0056] 2—cutter;

[0057] 3—Ejection return mechanism;

[0058] 31—rod;

[0059] 32—elastic element;

[0060] 4—process screws;

[0061] 5—driving cylinder;

[0062] 6—Extension rod;

[0063] 7—Inlay;

[0064] 8—pin;

[0065] 9—knife block cover;

[0066] 10—Pad. DETAILED DESCRIPTION

[0067] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0068] Implementation Method 1

[0069] like Figures 1 to 3 As shown, an in-mold hot-cutting cutter assembly includes a cutter holder 1, a cutter 2 fixedly mounted on the cutter holder 1, and an ejection return mechanism 3 fixedly connected to the cutter holder 1. The ejection return mechanism 3 first ejects the cutter 2 and the cutter holder 1, and then returns the cutter 2 and the cutter holder 1.

[0070] Specifically, Figures 1 to 3 As shown, the knife seat 1 is cylindrical, and is provided with a mounting groove 11. The cutter 2 is straight and is provided with a hanging platform, and the cutter 2 is fixedly installed in the mounting groove 11. The bottom of the mounting groove 11 is a plane, and the side of the mounting groove 11 is a plane. The center of the knife seat 1 coincides with the center of the mounting groove 11. After the cutter 2 is installed, the center of the cutter 2 coincides with the center of the knife seat 1.

[0071] Specifically, Figures 1 to 3As shown, the ejection return mechanism 3 includes a push rod 31 threadedly fixedly connected to the knife holder 1, an elastic element 32 sleeved on the push rod 31, and a gap is provided between the knife holder 1 and the elastic element 32. The elastic element 32 is a spring or a nitrogen spring. The gap is 0.3 to 100 mm, specifically 30 mm. The knife holder 1, the push rod 31, and the elastic element 32 are all circular, and the cutter 2 is square and has a cutting edge. The knife holder 1, the cutter 2, the ejection return mechanism 3, the process screw 4, the drive cylinder 5, and the extension rod 6 are all installed on the rear mold.

[0072] Preferably, if Figures 1 to 3 As shown, the side of the hot-cutting cutter assembly of the mold in this embodiment is provided with a process screw 4, and the cutter holder 1 is provided with a process step 12, and the process screw cooperates with the process step of the cutter holder 1, which is convenient for installation. The hot-cutting cutter assembly of the mold in this embodiment also includes a driving cylinder 5 and an extension rod 6. The driving cylinder 5 is fixedly installed on the rear mold, and the two ends of the extension rod 6 are respectively in contact with the push rod 31 and the driving cylinder 5, and the elastic element 32 elastically presses between the rear mold and the push rod 31.

[0073] The in-mold hot cutting cutter assembly of this embodiment is also provided with a control system, and the control system is used to control the operation of the oil cylinder 5.

[0074] The working principle of the in-mold hot cutting cutter assembly of this embodiment is as follows: the oil cylinder 5 works to push out a distance through the extension rod 6 and the push rod 31, and at the same time, the knife seat 1 pushes the cutter 2 out of the knife seat 1 for a distance, and the cutter 2 cuts off the water outlet; the oil cylinder 5 works to reset, and the push rod 31 drives the extension rod 6 and the knife seat 1 to reset under the action of the elastic force of the elastic element 32, and at the same time, the knife seat 1 resets with the cutter 2.

[0075] Implementation Method 2

[0076] The components, installation method and structure used in the second embodiment are basically the same as those in the first embodiment, except that the shape of the installation groove 11 of the knife holder 1 in this embodiment is different. Figure 4-Figure 5 As shown, the bottom of the mounting groove 11 is a curved surface, an inclined surface, or an arc, and the side of the mounting groove 11 is an inclined surface. There is a gap between the cutter 2 and the side of the mounting groove 11, and the gap is 0.1 mm to 5 mm, and the specific gap is 1 mm. Because the bottom of the mounting groove 11 is a curved surface, an inclined surface, or an arc, there is a gap between the cutter 2 and the side of the mounting groove 11. When the cutter 2 moves, the position can be slightly adjusted at any time to prevent it from being stuck.

[0077] Implementation Method 3

[0078] The components, installation method and structure used in the third embodiment are basically the same as those in the first embodiment, except that the knife holder 1 and the cutter 2 in this embodiment are an integrated structure (not shown).

[0079] Implementation Method 4

[0080] The components, installation method and structure used in the fourth embodiment are basically the same as those in the first embodiment, except that the present embodiment does not include an extension rod 6. Figure 6 As shown, the driving cylinder 5 is fixedly installed on the rear mold, and the push rod 31 is in conflict with the driving cylinder 5.

[0081] The working principle of the in-mold hot cutting cutter assembly of the fourth embodiment is as follows: the oil cylinder 5 works to push the knife seat 1 outward for a distance through the push rod 31, and at the same time the knife seat 1 pushes the cutter 2 outward for a distance, and the cutter 2 cuts off the water outlet; the oil cylinder 5 works to reset, and the push rod 31 drives the knife seat 1 to reset under the action of the elastic force of the elastic element 32, and at the same time the knife seat 1 resets with the cutter 2.

[0082] Implementation Method 5

[0083] The components, installation method and structure used in the fifth embodiment are basically the same as those in the first embodiment. Figure 7-Figure 8 As shown, the difference is that the in-mold hot cutting cutter assembly of this embodiment also includes an insert 7, and the cutter 2 and the insert 7 are semi-enclosed. The insert 7 is in contact with the parting surface of the mold core, and the insert 7 is provided with a notch along the mold opening direction. The cutter 2 is placed in the notch of the insert 7 and is movably sealed with it. The height of the cutter 2 and the insert 7 are consistent or inconsistent, and the specific requirements are determined according to the situation of the parting surface of the mold core. The cutter 2 and the insert 7 are respectively connected to the mold core with movably sealed glue, and the side of the insert 7 is provided with an inclined surface, which cooperates with the mold core to make the top surface of the insert 7 contact with the mold core, and the lower part of the insert 7 is also provided with a pin 8, which cooperates with the mold core to prevent the insert 7 from falling when moving.

[0084] The working principle of the hot-cutting cutter assembly in the mold of the fifth embodiment is as follows: the oil cylinder 5 works to push the cutter seat 1 outward for a distance through the push rod 31, and at the same time, the cutter seat 1 pushes outward for a distance with the insert 7 and the cutter 2, the pin 8 hooks the mold core to prevent the insert 7 from falling, and the cutter 2 cuts the water outlet; the oil cylinder 5 works to reset, and the push rod 31 drives the cutter seat 1 to reset under the elastic force of the elastic element 32, and at the same time, the cutter seat 1 resets with the cutter 2, and the insert 7 is pressed back by the parting surface of the mold core. For example: the water outlet thickness is 1.0mm and the mold expansion is 0.1mm: when the tool moves up 1mm to be flush with the parting surface, the cutter seat 1 will move up 0.1mm with the cutter 2 and the insert 7 to cut the water outlet, and when retreating, the cutter seat 1 and the cutter 2 retreat 1.1mm at the same time, and the insert 7 is pressed back by the parting surface of the mold core to be flush with the parting surface of the mold core.

[0085] Implementation Method 6

[0086] The components, installation methods and structures used in the sixth embodiment are basically the same as those used in the fifth embodiment, except that the present embodiment does not include an extension rod 6. Fig. 9As shown, the driving cylinder 5 is fixedly installed on the rear mold, and the push rod 31 is in conflict with the driving cylinder 5.

[0087] Implementation Method 7

[0088] The components, installation methods and structures used in the seventh embodiment are basically the same as those used in the fifth embodiment. Fig.10 As shown, the difference is that the side of the insert 7 of this embodiment is not provided with an inclined surface, but instead a hanging platform is provided at the head of the insert 7, and the hanging platform cooperates with the mold core to make the top surface of the insert 7 touch and contact the mold core.

[0089] Implementation Method 8

[0090] The parts, installation method and structure used in the eighth embodiment are basically the same as those in the first embodiment. The center of the knife holder 1 does not coincide with the center of the cutter 2, and there is a distance L between them. The value of L is 0.1 to 5 mm, and specifically the value of L is 0.5 mm (not shown).

[0091] Implementation Method 9

[0092] The components, installation methods and structures used in the ninth embodiment are basically the same as those used in the seventh embodiment, except that the present embodiment does not include an extension rod 6. Fig.11 As shown, the driving cylinder 5 is fixedly installed on the rear mold, and the push rod 31 is in conflict with the driving cylinder 5.

[0093] Implementation Method 10

[0094] The components, installation method and structure used in the tenth embodiment are basically the same as those in the first embodiment. Figure 12-13 As shown, the difference is that the in-mold hot cutting cutter assembly of this embodiment also includes an insert 7 and a knife seat sleeve 9, and the cutter 2 and the insert 7 are semi-enclosed. The insert 7 is in contact with the mold core parting surface, and the insert 7 is provided with a notch along the mold opening direction. The cutter 2 is placed in the notch of the insert 7 and is movably sealed with it. The height of the cutter 2 and the insert 7 is consistent or inconsistent, and the specific requirements are determined according to the situation of the mold core parting surface. The cutter 2 and the insert 7 are respectively connected to the mold core with movably sealed glue. There is no inclined surface on the side of the insert 7. Instead, a hanging platform is provided at the bottom of the insert 7. The hanging platform cooperates with the mold core so that the insert 7 will not fall when it moves. The knife seat sleeve 9 is movably sleeved on the knife seat 1, and the knife seat sleeve 9 is in contact with the bottom of the insert 7 and the rear mold core respectively. The knife seat sleeve 9 cooperates with the rear mold core to make the top surface of the insert 7 contact with the mold core. The cutter 2 is movably connected with the knife seat sleeve 9.

[0095] The working principle of the in-mold hot-cutting cutter assembly of the tenth embodiment is as follows: the oil cylinder 5 works to push the knife seat 1 outward for a distance through the push rod 31, and at the same time, the knife seat 1 is pushed outward for a distance with the insert 7, the knife seat sleeve 9 and the cutter 2, and the hanging platform of the insert 7 hooks the rear mold core to prevent the insert 7 from falling, and the cutter 2 cuts off the water outlet; the oil cylinder 5 works to reset, and the push rod 31 drives the knife seat 1 to reset under the action of the elastic force of the elastic element 32, and at the same time, the knife seat 1 is reset with the cutter 2, and the insert 7 and the knife seat sleeve 9 are pressed to reset by the action of the parting surface of the mold core. For example: the thickness of the sprue is 1.0mm, and the mold expansion is 0.1mm: when the cutter 2 moves up 1mm to be flush with the parting surface, the tool holder 1 will move up 0.1mm with the cutter 2, insert 7 and tool holder sleeve 9 to cut off the sprue. When retreating, the tool holder 1 and the cutter 2 retreat 1.1mm at the same time, and the insert 7 and the tool holder sleeve 9 are pressed back by the parting surface of the mold core, and the insert 7 is flush with the parting surface of the mold core.

[0096] Implementation Method Eleven

[0097] The components, installation methods and structures used in the eleventh embodiment are basically the same as those used in the tenth embodiment, except that the present embodiment does not include an extension rod 6. Fig.14 As shown, the driving cylinder 5 is fixedly installed on the rear mold, and the push rod 31 is in conflict with the driving cylinder 5.

[0098] Implementation Method Twelve

[0099] The components, installation method and structure used in the twelfth embodiment are basically the same as those in the first embodiment. Fig.15 As shown, the difference is that the cross-sectional shape of the tool holder 1 in this embodiment is square, and the process screw 4 is eliminated, and the process step 12 of the tool holder 1 is eliminated.

[0100] Implementation Method Thirteen

[0101] The components, installation method and structure used in the thirteenth embodiment are basically the same as those in the second embodiment. Figure 16-Figure 17 As shown, the difference is that the cross-sectional shape of the tool holder 1 in this embodiment is square, and the process screw 4 is eliminated, and the process step 12 of the tool holder 1 is eliminated.

[0102] Implementation Method 14

[0103] The parts, installation methods and structures used in the fourteenth embodiment are basically the same as those in the thirteenth embodiment, except that the knife holder 1 and the cutter 2 in this embodiment are an integrated structure (not shown).

[0104] Implementation Method Fifteen

[0105] The components, installation methods and structures used in the fifteenth embodiment are basically the same as those used in the twelve embodiment. Fig.18As shown, the difference is that the knife holder 1 of this embodiment is rectangular, and the width of the cutter 2 is less than or equal to the width of the knife holder 1. The push rod 31, the elastic element 32, the driving cylinder 5, and the extension rod 6 are all circular, and the number is 2.

[0106] Implementation Method 16

[0107] The components, installation methods and structures used in the sixteenth embodiment are basically the same as those used in the fifteenth embodiment. Fig.19 As shown, the difference is that the number of the push rods 31 and the elastic element 32 in this embodiment is both 2, and the number of the driving cylinder 5 and the extension rod 6 are both 1. The in-mold hot cutting cutter assembly of the fifteenth embodiment also includes a pad 10, and the two push rods are respectively threadedly fixed to the knife holder 1, and the two elastic elements 32 are respectively sleeved on the two push rods and elastically pressed between the push rods 31 and the knife holder 1. The two push rods are in conflict with the pad 10, the driving cylinder 5 is fixedly installed on the rear mold, and the extension rod 6 is respectively in conflict with the pad 10 and the driving cylinder 5.

[0108] Implementation Method 17

[0109] The components, installation methods and structures used in the seventeenth embodiment are basically the same as those used in the sixteenth embodiment. Fig. 20 As shown, the difference is that the backing plate 10 is eliminated in this embodiment, and the two push rods are respectively threadedly fixedly connected to the tool holder 1, and the two elastic elements 32 are respectively sleeved on the two push rods and elastically pressed between the push rod 31 and the tool holder 1, the driving cylinder 5 is fixedly installed on the rear mold, and the extension rod 6 is respectively in contact with the tool holder 1 and the driving cylinder 5.

[0110] Implementation 18

[0111] The components, installation methods and structures used in the eighteenth embodiment are basically the same as those used in the twelfth embodiment. Fig.21 As shown, the difference is that the in-mold hot cutting cutter assembly of this embodiment also includes an insert 7, and the cutter 2 and the insert 7 are semi-enclosed. The insert 7 is in contact with the parting surface of the mold core, and the insert 7 is provided with a notch along the mold opening direction. The cutter 2 is placed in the notch of the insert 7 and is connected with it by a movable seal. The height of the cutter 2 and the insert 7 are consistent or inconsistent, and the specific requirements are determined according to the situation of the parting surface of the mold core. The cutter 2 and the insert 7 are respectively connected with the movable seal of the mold core, and the head of the insert 7 is provided with a hanging platform, which cooperates with the mold core to make the top surface of the insert 7 contact with the mold core. The lower part of the insert 7 is also provided with a pin, and the pin cooperates with the mold core to prevent the insert 7 from falling when moving.

[0112] Implementation Method 19

[0113] The components, installation methods and structures used in the nineteenth embodiment are basically the same as those used in the fifteenth embodiment. Fig. 22As shown, the difference is that the in-mold hot cutting cutter assembly of this embodiment also includes an insert 7, and the cutter 2 and the insert 7 are semi-enclosed. The insert 7 is in contact with the parting surface of the mold core, and the insert 7 is provided with a notch along the mold opening direction. The cutter 2 is placed in the notch of the insert 7 and is connected with it by a movable seal. The height of the cutter 2 and the insert 7 are consistent or inconsistent, and the specific requirements are determined according to the situation of the parting surface of the mold core. The cutter 2 and the insert 7 are respectively connected with the movable seal of the mold core, and the head of the insert 7 is provided with a hanging platform, which cooperates with the mold core to make the top surface of the insert 7 contact with the mold core. The lower part of the insert 7 is also provided with a pin, and the pin cooperates with the mold core to prevent the insert 7 from falling when moving.

[0114] Implementation Method 20

[0115] The components, installation methods and structures used in the twentieth embodiment are basically the same as those used in the sixteenth embodiment. Fig.23 As shown, the difference is that the in-mold hot cutting cutter assembly of this embodiment also includes an insert 7, and the cutter 2 and the insert 7 are semi-enclosed. The insert 7 is in contact with the parting surface of the mold core, and the insert 7 is provided with a notch along the mold opening direction. The cutter 2 is placed in the notch of the insert 7 and is connected with it by a movable seal. The height of the cutter 2 and the insert 7 are consistent or inconsistent, and the specific requirements are determined according to the situation of the parting surface of the mold core. The cutter 2 and the insert 7 are respectively connected with the movable seal of the mold core, and the head of the insert 7 is provided with a hanging platform, which cooperates with the mold core to make the top surface of the insert 7 contact with the mold core. Two pins are also provided at the bottom of the insert 7, and the pins cooperate with the mold core to prevent the insert 7 from falling when moving.

[0116] Implementation Method 21

[0117] The components, installation methods and structures used in the twenty-first embodiment are basically the same as those used in the seventeenth embodiment. Fig.24 As shown, the difference is that the in-mold hot cutting cutter assembly of this embodiment also includes an insert 7, and the cutter 2 and the insert 7 are semi-enclosed. The insert 7 is in contact with the parting surface of the mold core, and the insert 7 is provided with a notch along the mold opening direction. The cutter 2 is placed in the notch of the insert 7 and is connected with it by a movable seal. The height of the cutter 2 and the insert 7 are consistent or inconsistent, and the specific requirements are determined according to the situation of the parting surface of the mold core. The cutter 2 and the insert 7 are respectively connected with the movable seal of the mold core, and the head of the insert 7 is provided with a hanging platform, which cooperates with the mold core to make the top surface of the insert 7 contact with the mold core. Two pins are also provided at the bottom of the insert 7, and the pins cooperate with the mold core to prevent the insert 7 from falling when moving.

[0118] Implementation Method 22

[0119] The parts, installation method and structure used in embodiment 22 are basically the same as those in embodiment 18. The difference is that the insert 7 of this embodiment eliminates the hanging platform, and instead, an inclined surface is provided on the side of the insert 7. The inclined surface cooperates with the mold core to make the top surface of the insert 7 touch and contact the mold core (not shown).

[0120] Implementation Method 23

[0121] The parts, installation method and structure used in embodiment 23 are basically the same as those in embodiment 19. The difference is that the insert 7 in this embodiment eliminates the hanging platform, and instead, an inclined surface is provided on the side of the insert 7. The inclined surface cooperates with the mold core to make the top surface of the insert 7 touch and contact the mold core (not shown).

[0122] Implementation Method 24

[0123] The parts, installation method and structure used in embodiment 24 are basically the same as those in embodiment 20. The difference is that the insert 7 of this embodiment eliminates the hanging platform, and instead has an inclined surface on the side of the insert 7. The inclined surface cooperates with the mold core to make the top surface of the insert 7 touch and contact the mold core (not shown).

[0124] Implementation Method 25

[0125] The parts, installation method and structure used in embodiment 25 are basically the same as those in embodiment 21. The difference is that the insert 7 of this embodiment eliminates the hanging platform, and instead has an inclined surface on the side of the insert 7. The inclined surface cooperates with the mold core to make the top surface of the insert 7 touch and contact the mold core (not shown).

[0126] Implementation Method 26

[0127] The components, installation methods and structures used in the twenty-sixth embodiment are basically the same as those used in the eighteenth embodiment. Fig.25 As shown, the difference is that the bottom of the insert 7 of this embodiment is provided with a hanging platform, which cooperates with the mold core to prevent the insert 7 from falling when moving. This embodiment also includes a knife seat sleeve 9, which is movably mounted on the knife seat 1. The knife seat sleeve 9 contacts the bottom of the insert 7 and the rear mold core respectively. The knife seat sleeve 9 cooperates with the rear mold core to make the top surface of the insert 7 contact with the mold core. The cutter 2 is movably connected to the knife seat sleeve 9.

[0128] Implementation Method 27

[0129] The components, installation methods and structures used in the twenty-seventh embodiment are basically the same as those used in the nineteenth embodiment. Fig.26As shown, the difference is that the bottom of the insert 7 of this embodiment is provided with a hanging platform, which cooperates with the mold core to prevent the insert 7 from falling when moving. This embodiment also includes a knife seat sleeve 9, which is movably mounted on the knife seat 1. The knife seat sleeve 9 contacts the bottom of the insert 7 and the rear mold core respectively. The knife seat sleeve 9 cooperates with the rear mold core to make the top surface of the insert 7 contact with the mold core. The cutter 2 is movably connected to the knife seat sleeve 9.

[0130] Implementation Method 28

[0131] The components, installation method and structure used in the embodiment 20 are basically the same as those used in the embodiment 20. Fig. 27 As shown, the difference is that the bottom of the insert 7 of this embodiment is provided with a hanging platform, which cooperates with the mold core to prevent the insert 7 from falling when moving. This embodiment also includes a knife seat sleeve 9, which is movably mounted on the knife seat 1. The knife seat sleeve 9 contacts the bottom of the insert 7 and the rear mold core respectively. The knife seat sleeve 9 cooperates with the rear mold core to make the top surface of the insert 7 contact with the mold core. The cutter 2 is movably connected to the knife seat sleeve 9.

[0132] Implementation Method Twenty-Nine

[0133] The components, installation methods and structures used in the twenty-ninth embodiment are basically the same as those used in the twenty-first embodiment. Fig.28 As shown, the difference is that the bottom of the insert 7 of this embodiment is provided with a hanging platform, which cooperates with the mold core to prevent the insert 7 from falling when moving. This embodiment also includes a knife seat sleeve 9, which is movably mounted on the knife seat 1. The knife seat sleeve 9 contacts the bottom of the insert 7 and the rear mold core respectively. The knife seat sleeve 9 cooperates with the rear mold core to make the top surface of the insert 7 contact with the mold core. The cutter 2 is movably connected to the knife seat sleeve 9.

[0134] Beneficial effects of the utility model:

[0135] 1. The insert has a cutter protection function, which improves the wear resistance of the insert;

[0136] 2. Protect the inserts and penetration positions from damage;

[0137] 3. It can reduce the size of parts to avoid interference with mold parts, have better general performance, and reduce the size of parts to improve the strength of the mold core;

[0138] 4. Effectively improving machining accuracy can effectively provide production stability;

[0139] 5. Effectively solve the problem of mold expansion and poor cutting of products;

[0140] 6. During the production process, the mold often expands between the parting surfaces of the mold, resulting in the nozzle being unable to be cut. Because the cutter needs to completely cut off the nozzle, the cutter must be 0.01-0.05 mm higher than the parting surface. If the cutter and the mold core are pierced for a long time, the cutter or the mold core will often be damaged. Adding inserts, the cutter and the insert are in contact with the mold core at the same time, increasing the contact area, effectively solving the problem of continuous cutting caused by mold expansion and the cutter or mold core being difficult to be damaged at the penetration position;

[0141] 7. The cutter is completely or partially offset and installed on the cutter seat. The oil cylinder is pushed out, the cutter cuts off the water outlet, the elastic element is reset, and the cutter and the insert are in contact with the mold core at the same time. In this way, one spring can be used, and at most two springs can be used, which reduces the number of parts. The size of the parts can be further reduced. According to specific needs, it can be designed into standard parts such as square or round. It has good versatility, the installation hole dug on the mold core becomes smaller, the mold core strength is higher, the cost is lower, the installation is convenient and simple, and the stability is improved.

[0142] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A cutter assembly for in-mold hot cutting, characterized in that: It comprises a knife seat (1), a cutter (2) mounted on the knife seat (1), and an ejection return mechanism (3) connected to the knife seat (1); the ejection return mechanism (3) first ejects the cutter (2) and the knife seat (1), and then returns the cutter (2) and the knife seat (1); The knife seat (1) is provided with a mounting groove (11), and the cutting knife (2) is mounted in the mounting groove (11); The bottom of the installation groove (11) is a curved surface, an inclined surface or an arc, the side of the installation groove (11) is an inclined surface, and a gap is provided between the cutter (2) and the side of the installation groove (11).

2. The in-mold hot cutting cutter assembly according to claim 1, characterized in that: The ejection return mechanism (3) comprises an ejector rod (31) connected to the knife seat (1) and an elastic element (32) sleeved on the ejector rod (31); a gap is provided between the knife seat (1) and the elastic element (32).

3. The in-mold hot cutting cutter assembly according to claim 2, characterized in that: The interval is 0.3 to 100 mm.

4. The in-mold hot cutting cutter assembly according to claim 2, characterized in that: The elastic element (32) is a spring or a nitrogen spring.

5. The in-mold hot cutting cutter assembly according to claim 1, characterized in that: A process screw (4) is provided on the side of the in-mold hot cutting cutter assembly.

6. The in-mold hot cutting cutter assembly according to any one of claims 1 to 5, characterized in that: The knife seat (1) and the cutting knife (2) are an integrated structure.

7. The in-mold hot cutting cutter assembly according to any one of claims 2 to 4, characterized in that: It also includes a driving cylinder (5) and an extension rod (6), wherein the driving cylinder (5) is mounted on the rear mold, and the two ends of the extension rod (6) respectively contact the push rod (31) and the driving cylinder (5), and the elastic element (32) elastically presses between the rear mold and the push rod (31).

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