A mold with a plug-in plate switching ejection mode mechanism

Abstract

The utility model relates to the technical field of injection molds, and in particular to a mold with a plug-in plate switching ejection mode mechanism, which includes: a fixed mold assembly; a movable mold assembly, wherein two first ejector rod holes are respectively provided on two opposite sides of the movable mold assembly, and a second ejector rod hole is provided at the center thereof; an insert plate assembly, which includes an insert plate arranged between an ejector pin base plate and a backing plate, and two first guide members and a second guide member installed on the insert plate; the two first guide members are fixedly installed between the fixed mold assembly and the movable mold assembly, and are installed on two opposite sides of the insert plate, and a slot corresponding to the first guide member is provided on the insert plate, and the extension directions of the two slots are consistent and the lengths thereof are the same as the diameter of the second ejector rod hole; a third ejector rod hole corresponding to the second ejector rod hole is provided on the insert plate, and the third positioning hole is located between the two slots. The utility model effectively solves the technical problems of the difficulty in installation and maintenance of the ejection structure of unformed products and the high investment cost in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a mold with a plug-in plate switching ejection mode mechanism. Background Art

[0002] Injection molding is a common and important production process in the production of plastic products. It mainly involves injecting molten plastic into a mold, cooling and solidifying it into the desired shape, and then taking the product out of the mold. However, during the injection molding process, the height of the product is too high and the wall thickness is too thin, which can easily lead to the product not being able to be smoothly formed. At this time, the traditional demoulding method cannot eject the unformed product.

[0003] In response to the above problems, the patent document with application number 202322583914.2 discloses a thin-wall ejector hot runner mold, in which a push rod fixing plate cylinder is arranged on the outside of the movable mold assembly, and the push rod fixing plate cylinder is connected to the push rod fixing plate and the push rod pad. When the product is not formed, the push rod fixing plate cylinder is started to eject the push rod fixing plate and the push rod pad upward, driving the push rod fixed on the push rod fixing plate and the push block installed on the top of the push rod to be ejected upward, and the top surface of the push block contacts the bottom surface of the product, driving the product to move upward, so that the product can be separated from the mold, and the unformed product can be demolded.

[0004] However, in order to ensure that the unmolded product can be ejected from the mold, a push rod plate fixing cylinder is arranged on the outside of the movable mold assembly, and the push rod plate is connected to the push rod fixing plate. The push rod fixing plate is lifted by the cylinder to drive the push rod to eject the product above it, thereby realizing the demolding of the unmolded product. However, the installation and maintenance of the cylinder outside the movable mold assembly are difficult, and the investment cost is high, which reduces the economic benefits of the enterprise. Utility Model Content

[0005] The utility model provides a mold with a plug-in plate switching ejection mode mechanism to solve the technical problems of difficult installation and maintenance of an ejection structure for unformed products and high investment cost in the prior art.

[0006] In order to solve the above problems, the mold with a plug-in plate switching ejection mode mechanism provided by the utility model adopts the following technical solutions:

[0007] A mold with a plug-in plate switching ejection mode mechanism, comprising:

[0008] Fixed mold assembly;

[0009] A movable mold assembly is connected with the fixed mold assembly, and the movable mold assembly includes a push plate, an ejector panel, an ejector bottom plate and a backing plate arranged in sequence from top to bottom, and two first ejector holes are respectively provided on two opposite sides of the movable mold assembly, and a second ejector hole is provided in the center thereof;

[0010] Also includes:

[0011] A plugboard assembly, comprising a plugboard disposed between the ejector base plate and the backing plate, and a first guide member and a second guide member mounted on the plugboard;

[0012] There are two first guide members, both of which are fixedly and vertically installed between the fixed mold assembly and the movable mold assembly, and are installed on two opposite sides of the insert plate. The insert plate is provided with slots corresponding to the two first guide members for inserting the first guide members. The two slots extend in the same direction and have the same length as the diameter of the second ejector rod hole.

[0013] The insert plate is provided with a third push stick hole corresponding to the second push stick hole, and the third push stick hole is located between the two slot holes;

[0014] Two spaced-apart mounting holes are provided at one end of the insert plate away from the slot hole, the direction of the line connecting the two mounting holes is consistent with the extension direction of the slot hole, and the distance between the two is the same as the diameter of the second top rod hole.

[0015] The mold with the plug-in plate switching ejection mode mechanism provided by the utility model has the beneficial effects of: by arranging the plug-in plate between the ejector bottom plate and the backing plate, a third ejector stick hole with the same diameter as the second ejector stick hole at the center of the movable mold assembly is opened on the plug-in plate, slot holes located on both sides of the third ejector stick hole are opened on the plug-in plate, a first guide member is installed in the slot hole, the first guide member passes through the slot hole and extends up and down to the fixed mold assembly and the movable mold assembly, two installation holes arranged at intervals are arranged on the side of the plug-in plate away from the slot hole, and the distance between the two is the same as the diameter of the second ejector stick hole, and the ejection mode of the ejector stick can be switched by inserting and withdrawing the plug-in plate between the backing plate and the ejector bottom plate;

[0016] When the product cannot be fully formed during demoulding, the insert plate is inserted until the first guide member is located at one end of the slot hole near the mounting hole, and then the second guide member is inserted into the outer mounting hole, and the insert plate is positioned with the first guide member and the second guide member. At this time, the third ejector rod hole and the second ejector rod hole are misaligned up and down, and the ejector rod of the injection molding machine is inserted from the second ejector rod hole, and is pushed upward to the insert plate and the mold ejector rod located in the first ejector rod hole. The insert plate drives the ejector bottom plate and the ejector panel to move upward, thereby driving the ejector rod installed on the ejector panel and the ejector block installed on the top of the ejector rod to move upward, so as to contact the bottom surface of the unformed product located above the ejector block and push it to move upward. At the same time, the mold ejector rod moves upward under the drive of the ejector rod of the injection molding machine, so as to drive the push plate to move upward, and the push plate pushes the side wall of the unformed product to move upward, thereby completing the demoulding of the product.

[0017] When the fully formed product is demoulded, the insert plate is pulled out until the first guide is located at the end of the slot away from the mounting hole, and then the second guide is inserted into the inner mounting hole, and the insert plate is positioned with the first guide and the second guide. At this time, the third ejector hole corresponds to the second ejector hole up and down. During the demoulding process, the ejector of the injection molding machine passes through the second ejector hole and the third ejector hole, as well as the ejector holes on the ejector panel and the ejector bottom plate from bottom to top in sequence, without driving the ejector rod to move upward, so as to ensure that the molded product can fall under the action of gravity after demoulding, which is convenient for collection. At the same time, the ejector of the injection molding machine is inserted from the first ejector hole, driving the ejector of the mold to move upward, so as to drive the push plate to move upward, and the push plate pushes the side wall of the molded product to move upward, thereby completing the demoulding of the product;

[0018] Through the above arrangement, the utility model can realize the demoulding of injection molded products and the demoulding of unmolded injection products. The structure of the plug plate assembly is simple and does not contain too many parts, which greatly reduces the difficulty of its installation and maintenance. In addition, the production cost of the plug plate assembly is low, which greatly reduces the investment cost of product production. In summary, the utility model effectively solves the technical problems of the difficulty of installation and maintenance of the ejection structure of unmolded products and the high investment cost in the prior art.

[0019] Furthermore, the plug plate is a shovel-shaped structure, which includes a long strip section and a rectangular section, the two slot holes and the third top stick hole are both arranged on the rectangular section, and the two mounting holes are arranged at one end of the long strip section away from the slot hole.

[0020] Furthermore, the length of the rectangular segment is greater than twice the diameter of the second top stick hole.

[0021] Furthermore, a positioning glass ball screw is installed on the bottom plate of the ejector pin, and the ball of the positioning glass ball screw faces the plug board. The plug board is provided with a ball groove matching the ball, and the ball is used to be stuck in the ball groove when the plug board is inserted or withdrawn to position the plug board.

[0022] Furthermore, the number of the positioning glass ball screws is two, and the two positioning glass ball screws are respectively located on the inner sides of the two slot holes.

[0023] Furthermore, the number of the ball grooves is four, and the four ball grooves are divided into two groups, with two in each group being arranged on the plug plate, the direction of the line between the two ball grooves in each group is consistent with the extension direction of the slot hole, and the spacing between the two ball grooves is the same as the length of the slot hole.

[0024] Furthermore, a plurality of oil grooves are provided on the top and bottom surfaces of the inserting plate, and lubricating oil is contained in the oil grooves to reduce the friction between the inserting plate and the ejector base plate and the pad.

[0025] Furthermore, the first guide member and the second guide member are both guide screws.

[0026] Furthermore, a connection portion between the elongated segment and the rectangular segment has a chamfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present invention will become easy to understand. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0028] Figure 1 A schematic diagram of the internal structure of a mold with a plug-in plate switching ejection mode mechanism provided by the utility model;

[0029] Figure 2 It is a structural schematic diagram of the insert plate insertion state of the mold with the insert plate switching ejection mode mechanism provided by the utility model;

[0030] Figure 3 It is a structural schematic diagram of the plug-in plate extraction state of the mold with the plug-in plate switching ejection mode mechanism provided by the utility model;

[0031] Figure 4 The utility model is a schematic diagram of the structure of the plug board.

[0032] Description of reference numerals:

[0033] 1. Push plate; 2. Ejector panel; 3. Ejector bottom plate; 4. Pad; 5. Mold ejector rod; 6. Injection molding machine ejector rod; 7. Insert plate; 8. First guide piece; 9. Second guide piece; 10. Slot hole; 11. Third ejector rod hole; 12. Mounting hole; 13. Long strip; 14. Rectangular section; 15. Positioning glass bead screw; 16. Ball groove; 17. Oil groove; 18. Chamfer; 19. Product; 20. Ejector rod; 21. Ejector block. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0035] It should be noted that the main concept of the mold with the plug-in plate switching ejection mode mechanism provided by the utility model is: by setting a plug-in plate assembly including a plug-in plate, two first guide members and a second guide member, the plug-in plate is provided with slots corresponding to the two first guide members, the first guide member is vertically arranged between the fixed mold assembly and the movable mold assembly, and is installed in the slot, two spaced mounting holes are arranged at one end of the plug-in plate away from the slot, the distance between the two mounting holes is the same as the length of the slot, and a third ejector rod hole corresponding to the second ejector rod hole of the movable mold assembly is provided between the two slots on the plug-in plate, and the ejection mode of the ejector rod can be switched by inserting and withdrawing the plug-in plate;

[0036] When the plug plate is inserted, the third ejector rod hole is misaligned with the second ejector rod hole, and the ejector rod of the injection molding machine is inserted from the second ejector rod hole and contacts the plug plate, which pushes up the ejector ground, ejector panel and ejector rod installed on the ejector panel above the plug plate, and the ejector block on the top of the ejector rod moves upward accordingly, demolding the unmolded product in contact with the ejector block;

[0037] When the insert plate is pulled out, the ejector rod of the injection molding machine passes through the second ejector rod hole and the third ejector rod hole, as well as the ejector rod holes opened on the ejector panel and the ejector bottom plate from bottom to top in turn, without driving the ejector rod to move upward, so as to ensure that the molded product can fall under the action of gravity after demoulding, so as to facilitate collection. At the same time, the ejector rod of the injection molding machine is inserted from the first ejector rod hole, driving the ejector rod of the mold to move upward, so as to drive the push plate to move upward, and the push plate pushes the side wall of the molded product to move upward, thereby completing the demoulding of the product.

[0038] After introducing the basic principle of the utility model, various non-limiting embodiments of the utility model are specifically introduced below. Any number of elements in the drawings is for illustration and not for limitation, and any naming is only for distinction and does not have any limiting meaning.

[0039] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0040] During the batch production process of products, since the temperature inside the mold is relatively low in the early stage of production, mold sticking is prone to occur, which affects the demolding of the product. In the prior art, two methods are mainly used to solve this problem. One is to configure a mold temperature controller to heat the mold to avoid the occurrence of mold sticking due to low mold temperature. The other is to install an oil cylinder on the mold, and use the oil cylinder to push the ejector fixing plate, the ejector pad and the ejector upward, thereby driving the ejector block installed on the top of the ejector to move upward to eject the sticky product from the mold.

[0041] However, the cost of the mold temperature controller is high, and it takes a long time for the mold temperature controller to heat up the mold. If the mold temperature is too high, the cooling effect of the cooling water in the mold will be greatly reduced. As for the method of installing an oil cylinder outside the mold to eject the sticking product, the oil cylinder will only operate when the mold is cold in the early stage and the product sticks to the mold. When the mold temperature rises in the later stage, the product will not stick to the mold. The oil cylinder basically does not operate and is in an idle state. In the production process of the product, the idle time of the oil cylinder is much greater than the operating time. This method has too much investment cost, low return rate and low economic benefits.

[0042] Embodiment 1 of the mold with a plug-in plate switching ejection mode mechanism provided by the utility model:

[0043] like Figures 1 to 3 As shown, the mold with a plug-in plate switching ejection mode mechanism includes a fixed mold assembly, a movable mold assembly and a group of plug-in plate assemblies, wherein the mold is a mold for producing a PVC switch box, the fixed mold assembly is located above the movable mold assembly, and is connected to the movable mold assembly, and the fixed mold assembly has a cavity for producing a product 20.

[0044] About the movable mold assembly. The movable mold assembly includes a push plate 1, an ejector panel 2, an ejector bottom plate 3 and a backing plate 4 which are arranged in sequence from top to bottom. Two first ejector rod holes are respectively provided on two opposite sides of the movable mold assembly, and a mold ejector rod 5 is provided in the first ejector rod hole. A second ejector rod hole is provided on the backing plate 4, the ejector bottom plate 3 and the ejector panel 2, and the second ejector rod hole is used to install an injection molding machine ejector rod 6. An ejector rod 20 extending upward to the cavity of the fixed mold assembly is also installed on the ejector panel, and an ejector block 21 is provided on the top of the ejector rod 20.

[0045] About the plug-in board assembly. The plug-in board assembly includes a plug-in board 7 disposed between the ejector base plate 3 and the backing plate 4, and a first guide member 8 and a second guide member 9 installed on the plug-in board 7, wherein the number of the first guide members 8 is two, and the two first guide members 8 are fixedly and vertically installed between the fixed mold assembly and the movable mold assembly, and are installed on two opposite sides of the plug-in board 7, and the number of the second guide member 9 is one, which is installed at the end of the plug-in board 7 away from the first guide member 8.

[0046] Specifically, the insert plate 7 is a spade-shaped structure, which includes a long strip section 13 and a rectangular section 14. The connecting portion of the long strip section 13 and the rectangular section 14 is provided with a chamfer 18. The length of the rectangular section 14 is greater than twice the diameter of the second top stick hole. The rectangular section 14 is provided with slots 10 corresponding to the two first guide members 8. The first guide members 8 are installed in the slots 10. The extending direction of the slots 10 is the same as the length direction of the rectangular section 14. The length of the slots 10 is the same as the diameter of the second top stick hole. A third top stick hole 11 corresponding to the second top stick hole is provided between the two slots 10. The rectangular section 14 is provided with two mounting holes 12 along its length direction. The distance between the two mounting holes 12 is the same as the diameter of the second top stick hole. The mounting holes 12 are used to install the second guide member 9.

[0047] Specifically, a plurality of oil grooves 17 are provided on the top and bottom surfaces of the inserting plate 7 . The oil grooves 17 are filled with lubricating oil to reduce the friction between the inserting plate 7 and the ejector base plate 3 and the backing plate 4 .

[0048] Specifically, the first guide member 8 and the second guide member 9 are both guide screws.

[0049] In addition, two positioning glass bead screws 15 are installed on the ejector base plate 3. The two positioning glass bead screws 15 are respectively installed on the inner sides of the two first guide members 8. The balls of the positioning glass bead screws 15 face the plug-in board 7. A ball groove 16 matching the ball is provided on the plug-in board 7. The ball is used to be stuck in the ball groove 16 when the plug-in board 7 is inserted or withdrawn to position the plug-in board 7.

[0050] Specifically, there are four ball grooves 16 , which are divided into two groups, with two in each group being arranged on the plug plate 7 , and the direction of the line connecting the two ball grooves 16 in each group is consistent with the extension direction of the slot hole 10 , and the spacing between the two ball grooves 16 is the same as the length of the slot hole 10 .

[0051] The working principle of the mold with the plug-in plate switching ejection mode mechanism provided by the utility model is: when the product 19 that has not been completely formed by demolding is inserted, the plug-in plate 7 is inserted until the first guide member 8 is located at the end of the slot hole 10 close to the mounting hole 12, and then the second guide member 9 is inserted into the outer mounting hole 12, and the first guide member 8 and the second guide member 9 are used to position the plug-in plate 7. At this time, the third ejector hole 11 and the second ejector hole are misaligned up and down, and the ejector 6 of the injection molding machine is inserted from the second ejector hole and pushed upward to the plug-in plate 7 and the mold ejector 5 located in the first ejector hole, and the plug-in plate 7 drives The ejector bottom plate 3 and the ejector panel 2 move upward, thereby driving the ejector rod 20 installed on the ejector panel 2 and the ejector block 21 installed on the top of the ejector rod 20 to move upward, so as to contact the bottom surface of the unformed product 19 located above the ejector block 21 and push it to move upward. At the same time, the ball of the positioning bead screw 15 is located in the ball groove 16 close to the mounting hole 12. The mold ejector rod 5 moves upward under the drive of the injection molding machine ejector rod 6 to drive the push plate 1 to move upward. The push plate 1 pushes the side wall of the unformed product to move upward, so that the demoulding of the product 19 can be completed.

[0052] When the fully formed product 19 is demolded, the insert plate 7 is pulled out until the first guide member 8 is located at the end of the slot 10 away from the mounting hole 12, and then the second guide member 9 is inserted into the inner mounting hole 12, and the insert plate 7 is positioned with the first guide member 8 and the second guide member 9. At this time, the third ejector hole 11 corresponds to the second ejector hole up and down. During the demolding process, the injection molding machine ejector 6 passes through the second ejector hole and the third ejector hole 11 from bottom to top, and does not drive the ejector rod 20 to move upward, so as to ensure that the molded product 19 can fall under the action of gravity after demolding, which is convenient for collection. At the same time, the injection molding machine ejector 6 is inserted from the first ejector hole, driving the mold ejector 5 to move upward, so as to drive the push plate 1 to move upward, and the push plate 1 pushes the side wall of the molded product 19 to move upward, thereby completing the demolding of the product 19.

[0053] Embodiment 2 of the mold with a plug-in plate switching ejection mode mechanism provided by the utility model:

[0054] The main difference between it and Example 1 is:

[0055] In Example 1, the mold is a mold for producing a PVC switch box.

[0056] In this embodiment, the mold is any mold, such as a mold for producing pipe caps. At this time, the ejector block installed on the top of the ejector pin is replaced by an ejector pin, which can solve the problem of air entrapment during the production of pipe caps.

[0057] Embodiment 3 of the mold with a plug-in plate switching ejection mode mechanism provided by the utility model:

[0058] The main difference between it and Example 1 is:

[0059] In Example 1, a chamfer is provided at the connection portion between the rectangular segment and the elongated segment.

[0060] In this embodiment, the connection between the rectangular segment and the elongated segment is a right angle.

[0061] Embodiment 4 of the mold with a plug-in plate switching ejection mode mechanism provided by the utility model:

[0062] The main difference between it and Example 1 is:

[0063] In Example 1, the mold is a mold for producing a PVC switch box.

[0064] In this embodiment, the mold is a mold for producing two or more products. The number of plug-in assemblies is the same as the number of types of molds produced. Each product corresponds to an plug-in assembly to eject different types of products from the mold separately, which facilitates the collection and classification of products.

[0065] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "upper", "lower", "length", "top", "bottom", "inside", "outside" and other terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings of this specification, which are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.

[0066] In addition, in the description of this specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

Claims

1. A mold with a plug-in plate switching ejection mode mechanism, comprising: Fixed mold assembly; A movable mold assembly is connected with the fixed mold assembly, and the movable mold assembly includes a push plate, an ejector panel, an ejector bottom plate and a backing plate arranged in sequence from top to bottom, and two first ejector holes are respectively provided on two opposite sides of the movable mold assembly, and a second ejector hole is provided in the center thereof; It is characterized by further comprising: A plugboard assembly, comprising a plugboard disposed between the ejector base plate and the backing plate, and a first guide member and a second guide member mounted on the plugboard; There are two first guide members, both of which are fixedly and vertically installed between the fixed mold assembly and the movable mold assembly, and are installed on two opposite sides of the insert plate. The insert plate is provided with slots corresponding to the two first guide members for inserting the first guide members, and the two slots extend in the same direction and have the same length as the diameter of the second ejector rod hole. The insert plate is provided with a third ejector rod hole corresponding to the second ejector rod hole, and the third ejector rod hole is located between the two slots. Two spaced-apart mounting holes are provided at one end of the insert plate away from the slot hole, the direction of the line connecting the two mounting holes is consistent with the extension direction of the slot hole, and the distance between the two is the same as the diameter of the second top rod hole.

2. The mold with a plug-in plate switching ejection mode mechanism according to claim 1 is characterized in that: The insert plate is a shovel-shaped structure, which includes a long strip section and a rectangular section. The two slot holes and the third top stick hole are both arranged on the rectangular section. The end of the long strip section away from the slot hole is provided with two mounting holes.

3. The mold with a plug-in plate switching ejection mode mechanism according to claim 2 is characterized in that: The length of the rectangular segment is greater than twice the diameter of the second top stick hole.

4. The mold with a plug-in plate switching ejection mode mechanism according to any one of claims 1 to 3, characterized in that: A positioning glass ball screw is installed on the bottom plate of the ejector pin, and the ball of the positioning glass ball screw faces the plug board. The plug board is provided with a ball groove matching the ball, and the ball is used to be stuck in the ball groove when the plug board is inserted or withdrawn to position the plug board.

5. The mold with a plug-in plate switching ejection mode mechanism according to claim 4 is characterized in that: The number of the positioning glass bead screws is two, and the two positioning glass bead screws are respectively located at the inner sides of the two slot holes.

6. The mold with a plate switching ejection mode mechanism according to claim 5, characterized in that: There are four ball grooves, which are divided into two groups, with two in each group arranged on the plug plate. The direction of the line between the two ball grooves in each group is consistent with the extension direction of the slot hole, and the spacing between the two ball grooves is the same as the length of the slot hole.

7. The mold with a plug-in plate switching ejection mode mechanism according to any one of claims 1 to 3, characterized in that: The top and bottom surfaces of the inserting plate are both provided with a plurality of oil grooves, and the oil grooves are filled with lubricating oil to reduce the friction between the inserting plate and the ejector bottom plate and the pad.

8. The mold with a plug-in plate switching ejection mode mechanism according to any one of claims 1 to 3, characterized in that: The first guide member and the second guide member are both guide screws.

9. The mold with a plug-in plate switching ejection mode mechanism according to claim 2 or 3, characterized in that: A connection portion between the long strip segment and the rectangular segment has a chamfer.

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