In-mold cutter structure

Abstract

The utility model provides an in-mold cutter structure which comprises a cutter holder (1), a cutter (2) installed on the cutter holder (1) in an offset mode, a return device (3) arranged on the cutter holder (1) and an ejection device (4) installed on a mold and connected with the cutter holder (1), the ejection device (4) ejects the cutter holder (1) and the cutter (2) outwards by a certain distance, and the return device (3) is used for enabling the cutter holder (1) to return. According to the utility model, one spring can be adopted, and at most two springs can be adopted, so that the number of parts is reduced, the sizes of the parts can be further reduced, the parts can be designed into square or round standard parts and the like according to specific requirements, the universality is good, mounting holes dug in the mold core are reduced, the strength of the mold core is higher, the cost is lower, and the mounting is convenient and simple; and the stability is improved. The utility model has the advantages of few parts, small part size, 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.

Description

Technical Field

[0001] The utility model relates to the technical field of in-die cutting, in particular to an in-die cutting knife structure. 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 four springs set in the cutter seat. The in-mold cutter assembly of the prior art has the following disadvantages: 1. There are many parts; 2. The parts are large in size and cannot be reduced, which easily interferes 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 parts are large in size, 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.

[0004] In view of this, it is necessary to provide an in-mold cutting knife structure 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 an in-mold cutting knife structure with a small number of parts, small size of parts, good stability after assembly, the ability to be made into standard parts, good versatility, high mold core strength, low replacement cost, and simple and convenient installation.

[0006] In order to solve the above technical problems, the utility model provides an in-mold cutting knife structure, which includes a knife seat, a cutting knife offset mounted on the knife seat, and a return device arranged on the knife seat, wherein the return device is used to return the knife seat.

[0007] A further improvement of the utility model is that the return device adopts an elastic element.

[0008] A further improvement of the utility model is that the elastic element is a spring or a nitrogen spring.

[0009] A further improvement of the utility model is that the knife seat is provided with a blind hole for placing the return device.

[0010] A further improvement of the utility model is that the knife seat is further provided with a through hole communicating with the blind hole.

[0011] A further improvement of the utility model is that the cutter is provided with a hanging platform.

[0012] A further improvement of the utility model is that the knife seat is provided with a mounting groove which is mounted in abutment with the hanging platform of the cutter.

[0013] A further improvement of the utility model is that the cutter is provided with a cutting edge.

[0014] A further improvement of the utility model is that the utility model is also provided with an ejection device, and the ejection device ejects the knife seat and the cutter outwards for a distance.

[0015] A further improvement of the utility model is that the ejection device adopts an oil cylinder for ejection.

[0016] Compared with the prior art, the utility model adopts a cutter that is completely or incompletely offset and installed on the cutter seat, the oil cylinder is pushed out, the cutter cuts off the water outlet, and the elastic element is reset, so that one spring can be used, and at most two springs can be used, which reduces the number of parts, and the size of the parts can be further reduced. According to specific needs, it can be designed into square or round standard parts, with 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. The utility model has a small number of parts, small size of parts, good stability after assembly, can be made into standard parts, good versatility, high mold core strength, low replacement cost, and simple and convenient installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Is a schematic diagram of a three-dimensional structure of an embodiment of the utility model;

[0018] Figure 2 yes Figure 1 Expand the three-dimensional structure diagram;

[0019] Figure 3 Is a schematic cross-sectional structure diagram of a knife holder of an embodiment of the utility model;

[0020] Figure 4 , Figure 5 Schematic diagram of the structure of two different installation methods of implementation mode one of the utility model;

[0021] Figure 6 Schematic diagram of the installation structure of the second embodiment of the utility model;

[0022] Figure 7 Is a schematic diagram of the three-dimensional structure of the fourth embodiment of the utility model;

[0023] Figure 8 yes Figure 7 Expand the three-dimensional structure diagram;

[0024] Fig. 9 Is a schematic diagram of the three-dimensional structure of the utility model implementation six;

[0025] Fig.10 yes Fig. 9 Expand the three-dimensional structure diagram;

[0026] Fig.11 This is a schematic cross-sectional structure diagram of the knife holder of the utility model implementation mode six;

[0027] Fig.12 Is a schematic diagram of the three-dimensional structure of the utility model embodiment seven;

[0028] Fig.13 yes Fig.12 Expand the three-dimensional structure diagram;

[0029] Fig.14 Is a schematic diagram of the three-dimensional structure of the utility model implementation eleven;

[0030] Fig.15 yes Fig.14 Expand the three-dimensional structure diagram;

[0031] Fig.16 Is a schematic cross-sectional structure diagram of the knife holder of the utility model embodiment XI;

[0032] Fig.17 Is a schematic diagram of the three-dimensional structure of the utility model embodiment twelve;

[0033] Fig.18 yes Fig.17 Expand the three-dimensional structure diagram;

[0034] Fig.19 It is a schematic diagram of the cross-sectional structure of the knife holder in the twelfth embodiment of the utility model.

[0035] The names of the components in the figure are as follows:

[0036] 1—Tool holder;

[0037] 11—blind hole;

[0038] 12—through hole;

[0039] 13—Mounting slot;

[0040] 14—through slot;

[0041] 2—cutter;

[0042] 21—hanging table;

[0043] 3—return device;

[0044] 4—Ejector device;

[0045] 41—oil cylinder;

[0046] 42—Top rod. DETAILED DESCRIPTION

[0047] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0048] Implementation Method 1

[0049] like Figure 1-Figure 5 As shown, an in-mold cutter structure includes a cutter holder 1, a cutter 2, a return device 3, and an ejection device 4. The ejection device 4 ejects the cutter holder 1 and the cutter 2 outward for a distance, and the return device 3 is used to return the cutter holder 1. The number of the cutter holder 1, the cutter 2, the return device 3, and the ejection device 4 is 1.

[0050] Specifically, Figure 1-Figure 5 As shown, the cutter 2 is completely offset and fixedly installed on the side of the cutter holder 1. The cutter 2 is in the shape of a flat blade and is provided with a blade for cutting off the water outlet. The cutter 2 is provided with a hanging platform 21. The cutter holder 1 is provided with a mounting groove 13 that is mounted in abutment with the hanging platform 21 of the cutter 2. The cutter 2 is fixedly installed on the side of the cutter holder 1 through the cooperation of the hanging platform 21 and the mounting groove 13.

[0051] Specifically, Figure 1-Figure 5 As shown, the shape of the tool holder 1 is square, and the tool holder 1 is provided with a blind hole 11 and a through hole 12 connected to the blind hole 11. The return device 3 is placed in the blind hole 11. The return device 3 uses an elastic element, and the elastic element is specifically a spring or a nitrogen spring. The ejection device 4 is installed on the mold and connected to the tool holder 1, and the ejection device 4 is ejected by a cylinder 41 alone.

[0052] Installation method 1: Figure 4-Figure 5 As shown, the return device 3 is placed in the blind hole 11 of the knife holder 1, and the cutter 2 is fixedly installed on the side of the knife holder 1 through the cooperation of the hanging platform 21 and the installation groove 13. The knife holder 1, the cutter 2, and the ejection device 4 are all installed on the front mold.

[0053] Installation method 2: Figure 4-Figure 5 As shown, the return device 3 is placed in the blind hole 11 of the knife holder 1, and the cutter 2 is fixedly installed on the side of the knife holder 1 through the cooperation of the hanging platform 21 and the installation groove 13. The knife holder 1, the cutter 2, and the ejection device 4 are all installed on the rear mold.

[0054] The working principle of the first embodiment is as follows: the oil cylinder 41 works to push the cutter 2 outwards through the knife holder 1 for a distance, and the cutter 2 cuts off the water outlet; the oil cylinder 41 resets, and the knife holder 1 resets with the cutter 2 under the action of the elastic force of the elastic element.

[0055] Implementation Method 2

[0056] The components, installation method and structure used in the second embodiment are basically the same as those in the first embodiment, except that the ejection device 4 of this embodiment is different. Figure 6 As shown, the ejection device 4 includes an ejector rod 42 connected to the tool holder 1 and an oil cylinder 41 connected to the ejector rod 42 , that is, an ejector rod 42 is added between the oil cylinder 41 and the tool holder 1 .

[0057] The working principle of the second implementation mode is as follows: the oil cylinder 41 drives the knife seat 1 to be pushed outward for a certain distance through the push rod 42, and the knife seat 1 drives the cutter 2 to be pushed outward for a certain distance, and the cutter 2 cuts off the water outlet; the oil cylinder 41 resets, and the knife seat 1 and the push rod 42 reset together with the cutter 2 under the action of the elastic force of the elastic element.

[0058] Implementation Method 3

[0059] The components, installation method and structure used in the third embodiment are basically the same as those in the first embodiment, except that the shape of the knife holder 1 in this embodiment is rectangular (not shown).

[0060] Implementation Method 4

[0061] The parts, installation methods and structures used in the fourth embodiment are basically the same as those in the first embodiment, except that the shape of the knife holder 1 in this embodiment is circular. Figure 7-Figure 8 shown.

[0062] Implementation Method 5

[0063] The components, installation method and structure used in the fifth embodiment are basically the same as those in the fourth embodiment. The difference is that the shape of the knife holder 1 in this embodiment is circular, and a plane is provided on the side close to the cutter 2, and the plane is parallel to the cutter 2 (not shown).

[0064] Implementation Method 6

[0065] The parts, installation methods and structures used in the sixth embodiment are basically the same as those in the fourth embodiment. The difference is that the shape of the knife seat 1 in this embodiment is circular, and the cutter 2 is not completely offset and fixedly installed on the knife seat 1. A through groove 14 is provided at the knife seat 1 away from the blind hole 11, and a mounting groove 13 is provided at the bottom of the through groove 14. The cutter 2 is installed in the through groove 14 and fixed with the mounting groove 13 by a hanging platform 21. Figure 9-11 shown.

[0066] Implementation Method 7

[0067] The components, installation method and structure used in the seventh embodiment are basically the same as those in the first embodiment, except that the shape of the tool holder 1 in this embodiment is a regular hexagon. Figure 12-13 shown.

[0068] Implementation Method 8

[0069] The parts, installation method and structure used in the eighth embodiment are basically the same as those in the first embodiment, except that the shape of the tool holder 1 in this embodiment is rectangular (not shown).

[0070] Implementation Method 9

[0071] The components, installation method and structure used in the ninth embodiment are basically the same as those in the first embodiment, except that the shape of the tool holder 1 in this embodiment is a regular octagon (not shown).

[0072] Implementation Method 10

[0073] The components, installation method and structure used in the tenth embodiment are basically the same as those in the first embodiment, except that the shape of the tool holder 1 in this embodiment is elliptical (not shown).

[0074] Implementation Method Eleven

[0075] The parts, installation methods and structures used in the eleventh embodiment are basically the same as those used in the sixth embodiment, except that the shape of the knife holder 1 in this embodiment is rectangular. Figure 14-16 As shown, the cutter 2 is incompletely offset and fixedly installed on the knife seat 1, and a through groove 14 is provided on the knife seat 1 away from the blind hole 11, and a mounting groove 13 is provided at the bottom of the through groove 14. The cutter 2 is installed in the through groove 14 and fixed with the mounting groove 13 by a hanging platform 21.

[0076] Implementation Method Twelve

[0077] The components, installation method and structure used in the twelfth embodiment are basically the same as those in the first embodiment, except that the shape of the knife holder 1 in this embodiment is rectangular, and the number of the blind hole 11, the through hole 12, the cutter 2 and the return device 3 are all two. Figure 17-Figure 19 As shown, the two cutters 2 are completely offset and fixedly installed on both side edges of the knife seat 1. Both side edges of the knife seat 1 are provided with installation grooves 13. The two cutters 2 are respectively installed in the through grooves 14 on both side edges of the knife seat 1 and are fixed with the installation grooves 13 through the hanging platform 21.

[0078] The utility model is also provided with a control system, and the control system is used to control the operation of the oil cylinder 41.

[0079] The beneficial effects of the utility model are as follows: the utility model adopts a cutter that is completely or incompletely offset and installed on the cutter seat, the oil cylinder is pushed out, the cutter cuts off the water outlet, and the elastic element is reset, so that one spring can be used, and at most two springs can be used, which reduces the number of parts, and 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, with 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. The utility model has a small number of parts, a small size of parts, good stability after assembly, can be made into standard parts, has good versatility, high mold core strength, low replacement cost, and is simple and convenient to install.

[0080] 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. An in-mold cutting knife structure, characterized in that: It comprises a knife seat (1), a cutting knife (2) offsetly mounted on the knife seat (1), and a return device (3) arranged on the knife seat (1), wherein the return device (3) is used to return the knife seat (1).

2. The in-mold cutting tool structure according to claim 1, characterized in that: The return device (3) adopts an elastic element.

3. The in-mold cutting knife structure according to claim 2, characterized in that: The elastic element is a spring or a nitrogen spring.

4. The in-mold cutting knife structure according to claim 1, characterized in that: The knife seat (1) is provided with a blind hole (11) for accommodating the return device (3).

5. The in-mold cutting knife structure according to claim 4, characterized in that: The knife seat (1) is also provided with a through hole (12) communicating with the blind hole (11).

6. The in-mold cutting knife structure according to claim 1, characterized in that: The cutter (2) is provided with a hanging platform (21).

7. The in-mold cutting knife structure according to claim 6, characterized in that: The knife seat (1) is provided with a mounting groove (13) which is mounted in abutment with the hanging platform (21) of the cutting knife (2).

8. The in-mold cutting knife structure according to claim 1, characterized in that: The cutting knife (2) is provided with a cutting edge.

9. The in-mold cutting knife structure according to claim 1, characterized in that: An ejection device (4) is also provided, and the ejection device (4) ejects the knife seat (1) and the cutting knife (2) outwards for a certain distance.

10. The in-die cutting knife structure according to claim 9, characterized in that: The ejection device (4) is ejected by a hydraulic cylinder.

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