Injection mold for rapid changeover

Abstract

The embodiment of the present disclosure provides a kind of injection mold for quick change, it includes base, support block is set on base, rear mold fixed plate and front mold fixed plate are sequentially set on support block, support block forms a cavity between base and rear mold fixed plate, rear mold core is set in rear mold fixed plate, front mold core is set in front mold fixed plate, front mold core and rear mold core are mutually adhered and set between front mold core and rear mold core, top plate is also set on front mold core, insert is fixed between front mold core and rear mold core by insert assembly, insert is supported by first ejection mechanism and second ejection mechanism, the first end of first ejection mechanism is in abutment with base, the second end of first ejection mechanism is in abutment with one side of insert, the first end of second ejection mechanism is connected with top plate, the second end of second ejection mechanism is in abutment with other side of insert.The embodiment of the present disclosure can be aimed at different inserts, by quickly replacing needle and insert assembly and other related components, so as to realize quick change.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of injection molding, in particular to an injection mold for rapid mold change. BACKGROUND

[0002] Injection molding is a method of product production molding, and products are usually molded using rubber and plastic. The process of injection molding is to use an injection molding machine to make various shaped products using an injection molding mold. For some tubular products that need to have a connectable connector at the end, a connector is usually separately injection molded and then glued to the tubular cavity. Another method is to use insert injection molding, place the tubular cavity in the mold, and directly fuse and connect the connector and the tubular cavity through injection molding. This method is very practical for some materials that are not sensitive to glue.

[0003] The existing insert injection mold has the following defects when in use:

[0004] The products of insert injection molding generally have many different specifications, and different specifications have different digital markings, and the markings are engraved on the ejector pin. Each time a different type of product is injection molded, the mold must be disassembled and the ejector pin must be replaced. This increases the labor intensity of the operator and increases the operator's mistakes during the disassembly of the injection mold, thereby reducing the safety and service life of the entire injection mold. In addition, the mold needs to be re-adjusted due to the re-mold change, which wastes materials.

[0005] In addition, the clamping tube size of different specifications is not the same, and each time a different type of product is injection molded, the mold must be disassembled and the insert must be replaced. This increases the labor intensity of the operator and increases the operator's mistakes during the disassembly of the injection mold, thereby reducing the safety and service life of the entire injection mold. In addition, the mold needs to be re-adjusted due to the re-mold change, which wastes materials. SUMMARY

[0006] The purpose of the embodiments of the present disclosure is to provide an injection mold for rapid mold change, which solves the problem of time consumption and material waste caused by frequent mold change in the actual use of the existing injection mold.

[0007] The embodiment of the present disclosure provides an injection mold for quick changeover, which comprises a base, a support block arranged on the base, a rear mold fixed plate and a front mold fixed plate arranged on the support block in sequence, a cavity formed between the base and the rear mold fixed plate, a rear mold core arranged in the rear mold fixed plate, a front mold core arranged in the front mold fixed plate, the front mold core and the rear mold core arranged in mutual abutment, a top plate arranged on the front mold core, and an insert fixed between the front mold core and the rear mold core through an insert assembly, wherein a first end of a first ejection mechanism is in abutment with the base, a second end of the first ejection mechanism is in abutment with one side of the insert, a first end of a second ejection mechanism is connected with the top plate, and a second end of the second ejection mechanism is in abutment with the other side of the insert.

[0008] In some embodiments, a positioning ring is arranged on the top plate, and the positioning ring is used for positioning the position of the second ejection mechanism.

[0009] In some embodiments, a ejector pin fixed plate is arranged in the positioning ring, and the ejector pin fixed plate is connected with the first end of the second ejection mechanism.

[0010] In some embodiments, the first ejection mechanism comprises a push plate arranged on the base, and a fixed plate arranged on the push plate, wherein the push plate and the fixed plate are arranged in the cavity, and a reset rod and a reset spring are arranged between the fixed plate and the rear mold fixed plate.

[0011] In some embodiments, the first ejection mechanism further comprises at least one ejector pin, wherein a first end of the ejector pin is fixed in the fixed plate, and a second end of the ejector pin passes through the rear mold fixed plate and the rear mold core in sequence and is in abutment with one side of the insert.

[0012] In some embodiments, the ejector pin comprises a head end and a distal end connected with each other, the length of the distal end is longer than that of the head end, and the head end and the distal end are detachably connected.

[0013] In some embodiments, the end of the distal end has a first protrusion and a first groove, the end of the head end has a second protrusion and a second groove, the first protrusion can be clamped in the second groove and the second protrusion can be clamped in the first groove, so that the distal end and the head end form a Z-shaped connection.

[0014] In some embodiments, the insert assembly comprises a front mold insert and a rear mold insert, the front mold insert is arranged in the front mold core, and the rear mold insert is arranged in the rear mold core.

[0015] In some embodiments, the front mold assembly and the rear mold insert are in the form of a strip and include at least one recess, the position and number of which are determined according to the number of the ejector pins.

[0016] In some embodiments, positioning grooves for mounting the insert assembly are arranged in the front mold core and the rear mold core, respectively, and a connecting hole is arranged in the middle of the recess.

[0017] The embodiments of the present disclosure solve the problems of long changeover time, mold wear caused by frequent disassembly of the injection mold, and human operation errors, and the injection mold cannot be quickly introduced into production in the actual use process of the existing injection mold. Different inserts can be quickly changed by quickly replacing the ejector pin and the insert assembly and other related components to achieve quick changeover. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 It is a perspective view of the injection mold of the embodiments of the present disclosure;

[0020] Figure 2 It is a sectional view of the perspective view of the injection mold of the embodiments of the present disclosure;

[0021] Figure 3 It is a structural schematic view of the injection mold of the embodiments of the present disclosure;

[0022] Figure 4 It is a structural sectional view of the injection mold of the embodiments of the present disclosure;

[0023] Figure 5 It is a structural sectional view of the injection mold of the embodiments of the present disclosure;

[0024] Figure 6 It is a structural sectional view of the injection mold of the embodiments of the present disclosure;

[0025] Figure 7 It is a structural schematic view of the ejector pin in the injection mold of the embodiments of the present disclosure;

[0026] Figure 8 It is a schematic view of the installation of the ejector pin in the injection mold of the embodiments of the present disclosure;

[0027] Figure 9 It is a detailed schematic view of the ejector pin in the injection mold of the embodiments of the present disclosure;

[0028] Figure 10 Structure diagram of insert assembly in injection mold of the embodiment of the present disclosure;

[0029] Figure 11 Structure diagram of insert assembly in injection mold of the embodiment of the present disclosure.

[0030] Reference signs:

[0031] 1 - first ejection mechanism; 2 - insert assembly; 201 - front mold insert; 202 - rear mold insert; 203 - recess; 204 connecting hole; 3 - front mold core; 4 - rear mold core; 5 positioning groove; 6 - rear mold fixing plate; 7 - support block; 7a - cavity; 8 - positioning ring; 9 - ejector pin fixing plate; 10 - front mold fixing plate; 11 - base; 12 - top plate; 13 - second ejection mechanism; 101 - ejector pin; 1011 - head end; 1011a - second protruding part; 1011b - second groove; 1012 - distal end; 1012a - first protruding part; 1012b - first groove; 102 - reset lever; 103 - reset spring; 104 - fixing plate; 105 - push plate. DETAILED DESCRIPTION

[0032] In the following, specific embodiments of the present disclosure will be described in detail with reference to the accompanying drawings, but not as a limitation of the present disclosure.

[0033] It should be understood that various modifications can be made to the embodiments disclosed herein. Therefore, the above description should not be considered to be restrictive, but merely as an example of the embodiments. Other modifications within the scope and spirit of the present disclosure will be suggested to one skilled in the art.

[0034] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the general description of the present disclosure given above, and the detailed description of the embodiments given below, serve to explain the principles of the present disclosure.

[0035] These and other characteristics of the present disclosure will become apparent from the following description of the preferred forms given, by way of non-limiting example, with reference to the attached drawings.

[0036] It should also be understood that, although the present disclosure has been described with reference to some specific examples, a person of skill in the art could achieve many other equivalent forms of the present disclosure, which have the characteristics as defined by the claims and thus all fall within the scope of protection offered by the present disclosure.

[0037] The above and other aspects, features, and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which:

[0038] Specific embodiments of the present disclosure are described herein with reference to the accompanying drawings. However, it should be understood that the disclosed embodiments are merely examples of implementing the present disclosure and can be implemented in various ways. Well-known and / or repetitive functions and structures are not described in detail to avoid unnecessary or redundant details that obscure the present disclosure. Therefore, specific structural and functional details disclosed herein are not intended to be limiting, but are merely as a basis for the claims and a representative basis for teaching one skilled in the art to employ the present disclosure in substantially any appropriate detailed structure.

[0039] It should be noted that the terms "first", "second", and the like in the description and claims of the present disclosure and the above drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices. The specification can use the phrases "in one embodiment", "in another embodiment", "in yet another embodiment" or "in other embodiments", which can all refer to one or more of the same or different embodiments under the present disclosure.

[0040] The present disclosure is further described below in conjunction with the drawings and specific embodiments.

[0041] The embodiments of the present disclosure provide an injection mold for quick changeover, which is arranged on an injection molding machine to complete injection molding operation. Specifically, the embodiments of the present disclosure can not only realize injection molding operation for inserts, but also realize quick changeover of related components in the injection mold for different specifications of inserts, so as to solve the problems of time consumption and material waste caused by frequent changeover of existing injection molds in actual use. In the embodiments of the present disclosure, the insert herein can be a catheter.

[0042] As shown in Figure 1 and Figure 2 , wherein, Figure 1 shows a structural schematic diagram of the injection mold for quick changeover, Figure 2 shows a cross-sectional structural diagram of the injection mold, specifically, the injection mold comprises a base 11, a support block 7 is arranged on the base 11, a rear mold fixed plate 6 and a front mold fixed plate 10 are sequentially arranged on the support block 7, and the support block 7 forms a cavity 7a between the base 1 and the rear mold fixed plate 6.

[0043] Further, a back mold core 4 is arranged in the back mold fixed plate 6, a front mold core 3 is arranged in the front mold fixed plate 10, and a top plate 12 is further arranged on the front mold core 10. The front mold core 3 and the back mold core 4 are arranged in close contact with each other, and the insert is arranged between the front mold core 3 and the back mold core 4, so that the insert can be subjected to the injection molding operation between the front mold core 3 and the back mold core 4.

[0044] Further, the injection mold further comprises a first ejection mechanism 1 and a second ejection mechanism 13, and an insert assembly 2. The first ejection mechanism 1 is arranged between the base 11 and the back mold core 4, and is used to support and press the insert from one side. The second ejection mechanism 13 is arranged between the top plate 12 and the front mold core 3, and is used to support and press the insert from the other side. Thus, the insert is arranged between the first ejection mechanism 1 and the second ejection mechanism 13, and the first ejection mechanism 1 and the second ejection mechanism 13 support the insert from the side of the back mold core 4 and the side of the front mold core 3 respectively.

[0045] The first end of the first ejection mechanism 1 is arranged on the base 11 and abuts against the base 11, the second end of the first ejection mechanism 1 abuts against one side of the insert, the first end of the second ejection mechanism 13 is connected with the top plate 12, and the second end of the second ejection mechanism 13 abuts against the other side of the insert. Thus, the support for the insert is realized from two directions.

[0046] Further, a positioning ring 8 is arranged on the top plate 12, which is used to position the second ejection mechanism 13 in the front mold core 3. A pin fixed plate 9 is arranged in the positioning ring 8, and the pin fixed plate 9 is connected with the first end of the second ejection mechanism 13. Thus, the position of the pin fixed plate 9 is arranged to fix the second ejection mechanism 13.

[0047] Further, as shown in Figure 3 , Figure 4 and Figure 5 The first ejection mechanism 1 comprises a push plate 105 arranged on the base 11. A fixed plate 104 is arranged on the push plate 105. The push plate 105 and the fixed plate 104 are arranged in the cavity 7a formed between the base 11 and the back mold fixed plate 6. A reset rod 102 and a reset spring 103 are arranged between the fixed plate 104 and the back mold fixed plate 6. The push plate 105 can move relative to the base 11, so as to drive the fixed plate 104 to move.

[0048] Further, the first ejection mechanism 1 further comprises at least one ejector pin 101 fixed by the fixed plate 104, the number of the ejector pin 101 is determined according to the size of the insert, for example, when the catheter as the insert is longer, a plurality of ejector pins 101 can be used, for example, in the embodiment of the present disclosure, two parallel arranged ejector pins 101 are used, and the two ejector pins 101 are arranged at the front and rear of the insert respectively.

[0049] Further, the first end of the ejector pin 101 is fixed in the fixed plate 104 and can move up and down according to the movement of the push plate 105, and the second end of the ejector pin 101 passes through the rear mold fixed plate 6 and the rear mold core 4 in turn and supports the insert from one side of the insert. The second ejection mechanism 13 can adopt an ejector pin structure arranged in the front mold core 3 to support the insert from the other side of the insert.

[0050] Further, the ejector pin 101 here adopts an assembly structure, as shown in Figure 7 、 Figure 8 and Figure 9 , which comprises a head end 1011 and a distal end 1012 connected to each other, and the length of the distal end 1012 is longer than that of the head end 1011, wherein one side end of the distal end 1012 is fixed in the fixed plate 104, and the head end 1011 and the distal end 1012 form a detachable connection structure, so that the head end 1011 can be replaced at any time for different inserts.

[0051] In a specific embodiment, one side end of the distal end 1012 has a first protrusion 1012a and a first groove 1012b, and the end of the head end 1011 opposite to the distal end 1012 has a second protrusion 1011a and a second groove 1011b, wherein the first protrusion 1021a can be engaged in the second groove 1011b, and the second protrusion 1011a can be engaged in the first groove 1012b, thereby forming a Z-shaped connection between the end of the distal end 1012 and the end of the head end 1011.

[0052] The end face of the head end 1011 is engraved with a number mark to match the model of the insert product of different specifications. When the insert is replaced, the ejection stroke of the injection molding machine is first set to ensure that the position of the joint between the head end 1011 and the distal end 1012 of the ejector pin 101 is higher than the position of the upper surface of the rear mold core 4. Here, the push plate 105 can be used to move the ejector pin 101 to facilitate the removal and replacement of the head end 1011 with a number mark.

[0053] In actual production, the ejection stroke of the injection molding machine must be reset to ensure that the position of the joint between the head end 1011 and the distal end 1012 of the ejector pin 101 is not higher than the position of the upper surface of the rear mold core 4, so as to avoid dislocation of the joint between the head end 1011 and the distal end 1012 of the ejector pin 101 and damage to the head end 1011.

[0054] In addition, as shown in Figure 6 , Figure 10 and Figure 11 , the injection mold further comprises an insert assembly 2 for fixing the insert, the insert assembly 2 comprising a front mold insert 201 and a rear mold insert 202, the front mold insert 201 being arranged in the front mold core 3, and the rear mold insert 202 being arranged in the rear mold core 4. The front mold insert 201 and the rear mold insert 202 are identical in structure, as shown in Figure 6 . Taking the rear mold insert 202 arranged in the rear mold core 4 as an example, it is in the form of a strip and comprises at least one recess 203, the position and number of the recess 203 being determined according to the number of the ejector pin 101. The recess 203 is used to enable the head end 1011 of the ejector pin 101 to be ejected.

[0055] In addition, positioning grooves 5 for mounting the insert assembly 2 are arranged in the front mold core 3 and the rear mold core 4, respectively. A connecting hole 204 is arranged in the middle of the recess 203, which cooperates with the positioning groove 5 to realize connection between the front mold core 3 or the rear mold core 4 through a fastener such as a bolt. The positioning groove 5 is provided with an M5 specification internal thread, and the connecting hole 204 on the front mold insert 201 and / or the rear mold insert 202 is provided with an M6 specification internal thread. When the specifications are changed, the front mold insert 201 and the rear mold insert 202 are first removed by rotating the M6 specification bolt, and then installed in the positioning groove 5 when needed, and finally fixed by the M5 specification bolt.

[0056] Therefore, when the mold is designed for the insert, only the size of the pipe is different between the inserts with different specifications, and only the head end 1011 and the insert assembly 2 with the number mark need to be replaced when the insert with a different specification is replaced. Therefore, the injection mold does not need to be disassembled when the type is changed, and the replacement of the head end 1011 and the insert assembly 2 can be completed on the injection molding machine. The injection mold is designed to ensure the ejection and reset of the first ejection mechanism 1.

[0057] The injection mold for quick type change can greatly reduce the labor intensity of the operator and avoid the mistakes of the operator during the disassembly of the injection mold, thereby improving the safety and service life of the entire injection mold for quick type change.

[0058] When the related components with different specifications need to be replaced, the ejection stroke of the injection molding machine is first set, the position of the connection between the head end 1011 and the distal end 1012 of the ejector pin 101 is confirmed to be higher than the upper surface of the rear mold core 6, and the head end 1011 with the number mark can be quickly replaced from the connection. In addition, the insert assembly 2 for quick type change can also be replaced on the original injection mold. When the specification is changed, only the M5 specification bolt needs to be removed, and then the M6 specification bolt is matched with the internal thread of the insert assembly 2 to quickly replace the components with other specifications.

[0059] Then, the ejection stroke of the injection molding machine is reset, the movement of the push plate 105 is adjusted to confirm that the position of the connection between the head end 1011 and the distal end 1012 of the ejector pin 101 is not higher than the upper surface of the rear mold core 6, and the misalignment of the proximal end 1011 and the distal end 1012 of the ejector pin 101 at the connection due to vibration is avoided. The entire installation process is safe and quick, and the injection mold does not need to be disassembled, which can ensure the continuity of production, improve productivity, and reduce the labor intensity of the operator.

[0060] The injection mold for quick type change can quickly change the type of the injection mold, and the quick replacement of the ejector pin and the insert assembly can achieve quick type change for different inserts.

[0061] The above-mentioned embodiment numbers of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0062] In the above-described embodiments of the present application, the description of each embodiment focuses on different aspects, and the parts not described in detail in one embodiment can be seen from the relevant description of other embodiments.

[0063] For the purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "rear", "front", "vertical", "horizontal", and derivatives thereof shall relate to the application as oriented in the drawings. However, it is to be understood that the application can assume various alternative orientations and, accordingly, such terms are not to be taken as limitations of the present application, except where so expressly defined by the specification. All such modifications and variations are considered to be within the scope of the present application.

[0064] In addition to the above, it is to be noted that like reference numerals are used throughout the drawings to designate like features and components that are common to the figures. It is also to be noted that the terminology used in the description herein is for the purpose of describing the particular embodiments only and is not intended to be limiting. It is also possible in the present disclosure that

[0065] In the above-described embodiments of the present application, the description of each embodiment focuses on different aspects, and the parts not described in detail in one embodiment can be seen from the relevant description of other embodiments.

[0066] The preferred embodiments of the present application have been described above with the aid of drawing figures, which are intended to be illustrative only and not restrictive of the application. It will be apparent to those skilled in the art that modifications, improvements and variations of the application can be made without departing from the essential spirit and scope of the application. Accordingly, it is intended that such modifications, improvements and variations be included within the scope of the present application.

Claims

1. An injection mold for quick mold changeover, comprising a base, a first ejection mechanism, and a second ejection mechanism, a support block disposed on the base, a rear mold fixing plate and a front mold fixing plate sequentially disposed on the support block, the support block forming a cavity between the base and the rear mold fixing plate, a rear mold core disposed in the rear mold fixing plate, a front mold core disposed in the front mold fixing plate, the front mold core and the rear mold core being fitted together, a top plate further disposed on the front mold core, and an insert being fixed between the front mold core and the rear mold core by an insert assembly, characterized in that... The first end of the first ejector mechanism abuts against the base, the second end of the first ejector mechanism abuts against one side of the insert, the first end of the second ejector mechanism is connected to the top plate, and the second end of the second ejector mechanism abuts against the other side of the insert. A positioning ring is provided on the top plate for positioning the second ejector mechanism. A pin fixing plate is provided in the positioning ring and is connected to the first end of the second ejector mechanism. The first ejector mechanism includes a push plate disposed on the base, and a fixing plate is disposed on the push plate. Both the push plate and the fixing plate are disposed in the cavity. The push plate can move relative to the base, thereby driving the fixing plate to move. A reset rod and a reset spring are provided between the plate and the rear mold fixing plate. The first ejection mechanism also includes at least one ejector pin. The first end of the ejector pin is fixed in the fixing plate, and the second end of the ejector pin passes through the rear mold fixing plate and the rear mold core in sequence and abuts against one side of the insert. The ejector pin includes a head end and a distal end that are connected to each other. A detachable connection is formed between the head end and the distal end. The end face of the head end is engraved with a number to match different specifications of insert products. When replacing the head end for different inserts, the connection between the head end and the distal end is ensured to be higher than the upper surface of the rear mold core to facilitate the removal and replacement of the head end.

2. The injection mold according to claim 1, characterized in that, The distal end is longer than the head end.

3. The injection mold according to claim 2, characterized in that, The distal end has a first protrusion and a first groove, and the head end has a second protrusion and a second groove. The first protrusion can engage in the second groove, and the second protrusion can engage in the first groove, thereby forming a Z-shaped connection between the distal end and the head end.

4. The injection mold according to claim 1, characterized in that, The insert assembly includes a front mold insert and a rear mold insert, the front mold insert being disposed in the front mold core and the rear mold insert being disposed in the rear mold core.

5. The injection mold according to claim 4, characterized in that, The front mold insert or the rear mold insert is strip-shaped and includes at least one recess, the position and number of which are determined according to the number of ejector pins.

6. The injection mold according to claim 5, characterized in that, Positioning grooves for mounting the insert assembly are respectively provided in the front mold core and the rear mold core, and a connecting hole is provided in the center of the recess.

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