Injection mold convenient to demold

Abstract

The utility model discloses an injection mold convenient to demold, relates to the technical field of injection molding process equipment, and solves the problems that in the prior art, a formed product is easily clamped on the mold and is inconvenient to demold, and during demolding, the product needs to extend into a space between an upper mold plate and a lower mold plate to be separated from the mold vertically upwards and then taken out outwards, which is troublesome and the like. Comprising a device body, an upper die and a lower die are arranged in the device body, and a lifting driving piece for driving the upper die to move up and down is further arranged in the device body; one side of the lower die is connected with the rotating shaft and rotationally connected into the device body through the rotating shaft, the other side of the lower die is placed on the supporting block, a rotating driving piece is further connected into the device body, the rotating piece drives the lower die to rotate upwards from the upper side of the supporting block, and die taking is convenient. The lower mold can be controlled to incline and face a user, so that a product on the mold can be observed conveniently, demolding is facilitated, the product only needs to be taken out obliquely upwards in the demolding process, and operation is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding process equipment, in particular to an injection mold with convenient demoulding. Background Art

[0002] Injection molding is a processing method used in the mass production of certain parts with complex shapes. The heated and molten plastic is injected into the mold cavity by an injection molding machine under high pressure. After cooling and solidification, a molded product is obtained. For example, injection molding is used in the production of plastic trays.

[0003] Injection molds generally include an upper mold and a lower mold. In actual processing, it is found that existing injection molds have certain shortcomings. For example, the molded product is easily stuck on the mold, which is inconvenient to demold. Moreover, when demolding, it is necessary to reach between the upper mold and the lower mold to separate the mold vertically upwards and then take it out. This operation is also relatively troublesome. Utility Model Content

[0004] The purpose of the utility model is to provide an injection mold with convenient demoulding, which can control the lower mold to tilt toward the user, thereby facilitating observation of the product on the mold, thereby facilitating demoulding. The demoulding process only requires taking out the product diagonally upward, which is more convenient to operate.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A convenient demoulding injection mold comprises a device main body, wherein an upper mold and a lower mold are arranged in the device main body, and a lifting drive member for driving the upper mold to move up and down is also arranged in the device main body; one side of the lower mold is connected to a rotating shaft and is rotatably connected to the device main body through the rotating shaft, and the other side is placed on a supporting block, and a rotating drive member is also connected in the device main body, and the rotating member drives the lower mold to rotate upward from the upper side of the supporting block, so as to facilitate mold removal.

[0007] Furthermore, the lifting drive member includes a cylinder connected to the device body, and the output end of the cylinder is downwardly connected to the upper mold.

[0008] Furthermore, the rotation driving member includes a first gear coaxially connected to the rotating shaft, the first gear is meshed with a toothed plate, and the toothed plate drives the lower mold to rotate by moving along its own length direction.

[0009] Furthermore, the tooth plate is vertically arranged and connected to the device body by sliding up and down. A support plate is connected to one side of the tooth plate, and the upper mold is connected to a pallet. The pallet is located directly below the support plate. After the upper mold rises upward, the tooth plate is driven upward by the pallet. The tooth plate moves upward and drives the lower mold to rotate upward from the upper side of the support block.

[0010] Furthermore, a first spring is connected to the device body, and the first spring drives the tooth plate downward. The tooth plate moves downward and drives the lower mold to rotate downward until it abuts against the upper side of the support block.

[0011] Furthermore, a fixed cylinder is connected to the device body, a movable plug is connected to the top of the tooth plate, the movable plug slides up and down in the fixed cylinder, and two ends of the first spring respectively abut against the lower side of the upper end plate of the fixed cylinder and the upper side of the movable plug.

[0012] Furthermore, an inner cavity is opened in the lower mold, and a top mold plate is arranged in the inner cavity. The top mold plate passes through the upper side of the inner cavity and slides up and down to be connected to the inner cavity, so as to lift the product from the lower mold. A top mold driving component for driving the top mold plate to rise and fall is also arranged in the inner cavity.

[0013] Furthermore, the top mold driving component includes an intermediate gear, one side of which is engaged with the top mold plate, and the top mold plate is driven to rise and fall through the rotation of the intermediate gear.

[0014] Furthermore, the middle gear is engaged with the reverse thrust plate on the side away from the top template, and a second spring is provided on the upper end of the reverse thrust plate. The second spring drives the reverse thrust plate to descend, and drives the top template to rise through the middle gear to lift the product from the lower mold.

[0015] Furthermore, the lower end of the reverse thrust plate passes through the lower side of the lower mold, and when the lower mold rotates downward until it abuts against the support block, the support block pushes the reverse thrust plate to overcome the force of the second spring and move upward, driving the top mold plate to descend through the intermediate gear until the top mold plate is flush with the upper surface of the lower mold.

[0016] In summary, the utility model has the following beneficial effects:

[0017] 1. When the upper mold moves upward, the lower mold can be automatically tilted through transmission, and the tilting amplitude is related to the upward moving distance of the upper mold. In this way, the tilting amplitude of the lower mold can be controlled by controlling the upward moving distance of the upper mold during demoulding, which makes it easier to take the product on the lower mold without having to fully extend the hand between the upper and lower molds;

[0018] At the same time, the inclined lower mold also makes it easy to clean the residue on it.

[0019] 2. When the lower mold changes from a flat state to an inclined state, the top mold plate can also move up automatically, thereby automatically pushing the product on the lower mold core to achieve the effect of convenient demoulding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of an injection mold with convenient demoulding in Example 1;

[0021] Figure 2 This is a schematic diagram of the connection of the lower mold part in a convenient demoulding injection mold in Example 1;

[0022] Figure 3 It is a structural schematic diagram of a fixed cylinder part in an injection mold for convenient demoulding in Example 1;

[0023] Figure 4 It is a schematic diagram of the internal structure of the lower mold part of an injection mold for convenient demoulding in Example 2.

[0024] In the figure, 1, bottom plate; 2, connecting rod; 3, top plate; 4, lower mold; 5, upper mold; 6, cylinder; 7, sliding sleeve; 8, fixed plate; 9, rotating shaft; 10, first gear; 11, tooth plate; 12, support plate; 13, support plate; 14, moving plug; 15, fixed cylinder; 16, first spring; 17, support block; 18, top mold plate; 19, intermediate gear; 20, reverse thrust plate; 21, second spring; 22, inner cavity. DETAILED DESCRIPTION

[0025] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings, and this embodiment does not constitute a limitation of the utility model. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0026] Embodiment 1;

[0027] like Figure 1 As shown, a convenient demoulding injection mold includes a device body, the device body includes a bottom plate 1 at the bottom and a top plate 3 at the top, the bottom plate 1 and the top plate 3 are connected and fixed by four connecting rods 2, a lower mold 4 and an upper mold 5 are respectively arranged between the bottom plate 1 and the top plate 3, and a lifting driving member for driving the upper mold 5 to move up and down is also provided in the device body, so that the upper mold 5 is movably arranged between the bottom plate 1 and the top plate 3;

[0028] Specifically, the lifting drive member may include a plurality of cylinders 6 connected to the top plate 3, the output end of the cylinder 6 is downwardly connected to the upper mold 5, and the upper mold 5 is driven to rise and fall by the cylinder 6, which may also be replaced by a lifting drive structure such as an electric cylinder or a hydraulic cylinder;

[0029] In actual application, the upper mold 5 moves downward and merges with the lower mold 4, and then injection molding is performed. When demoulding, the upper mold 5 is controlled to move upward.

[0030] like Figure 1 and Figure 2 As shown, four sliding sleeves 7 are also installed on both sides of the upper mold 5, and the sliding sleeves 7 are slidably arranged on the corresponding four connecting rods 2. By sliding the sliding sleeves 7 on the connecting rods 2, the upper mold 5 can move up and down more smoothly;

[0031] The lower mold 4 is rotatable, and the two side edges of the front side of the lower mold 4 are respectively connected to the rotating shaft 9, and is rotatably connected to the device body through the rotating shaft 9. The rear side of the lower mold 4 is not fixed, and is directly placed on the support block 17, and the support block 17 is fixed on the base plate 1.

[0032] like Figure 2 As shown, a rotating driving member is connected to the main body of the device, and the rotating member drives the lower mold 4 to rotate upward from the upper side of the support block 17 to facilitate mold removal;

[0033] Specifically, the two front connecting rods 2 are fixedly connected to the fixed plate 8, and the rotating shaft 9 is respectively installed on both sides of the front end of the lower mold 4, and the rotating shaft 9 passes through and is rotatably connected in the fixed plate 8, so that the entire lower mold 4 can be rotated by the rotating shaft 9; when taking out the product (tray), the lower mold 4 is controlled to tilt (the upper side of the lower mold 4 turns towards the staff), which can facilitate the staff to take the tray and improve the use effect.

[0034] like Figure 1 and Figure 2 As shown, in this embodiment, the rotating driving member includes a first gear 10 coaxially connected to the end of the rotating shaft 9 (the rotating shafts 9 on both sides correspond to two sets of rotating members respectively), and the first gear 10 is meshed with a tooth plate 11, and the tooth plate 11 drives the lower mold 4 to rotate by moving along its own length direction;

[0035] In this embodiment, in order to reduce the electric drive structure, the tooth plate 11 is vertically arranged and slidably connected to the device body up and down. A support plate 12 is connected to one side of the tooth plate 11, and the upper mold 5 is connected to the support plate 13 (the support plate 13 is fixedly installed on the two sliding sleeves 7 on the front side). The support plate 13 is located directly below the support plate 12. After the upper mold 5 rises upward, the support plate 12 is lifted up by moving the support plate 13 upward to drive the tooth plate 11 upward. The upward movement of the tooth plate 11 drives the free end of the lower mold 4 to rotate upward from the upper side of the support block 17.

[0036] like Figure 1 and Figure 3 As shown, in order to facilitate the reset of the lower die 4, a first spring 16 is also connected to the main body of the device. When the upper die 5 moves downward, the first spring 16 drives the tooth plate 11 downward, and the tooth plate 11 moves downward to drive the lower die 4 to rotate downward until it abuts against the upper side of the support block 17;

[0037] Specifically, a fixed cylinder 15 is connected to the upper side of the top plate 3, and the top end of the tooth plate 11 passes through the top plate 3 and is connected to the movable plug 14. The movable plug 14 slides up and down in the fixed cylinder 15. A vent hole can be opened on the top or periphery of the fixed cylinder 15. The first spring 16 is located in the fixed cylinder 15, and its two ends are respectively connected to the lower side of the upper end plate of the fixed cylinder 15 and the upper side of the movable plug 14.

[0038] When the upper die 5 moves downward and approaches the lower die 4, the lower die 4 rotates to a flush state under the action of the first spring 16 and its own weight, and the support plate 13 does not interfere with the support plate 12; conversely, when the upper die 5 moves upward, the support plate 13 lifts the support plate 12, thereby pushing the tooth plate 11 upward. When the tooth plate 11 moves upward and compresses the first spring 16 through the moving plug 14, it also drives the first gear 10 to rotate. The first gear 10 rotates through the rotating shaft 9, so that the entire lower die 4 rotates and tilts;

[0039] Thus, when the upper mold 5 moves upward, the transmission can automatically cause the lower mold 4 to tilt, with the free end moving upward away from the support block 17, and the tilting amplitude is related to the upward moving distance of the upper mold 5. In this way, the staff can control the tilting amplitude of the lower mold 4 by controlling the upward moving distance of the upper mold 5 during demoulding, thereby facilitating the removal of the plate on the lower mold 4.

[0040] Embodiment 2:

[0041] The structure of this embodiment is roughly the same as that of the first embodiment, except that:

[0042] like Figure 4 As shown, in order to further facilitate the removal of the product, an inner cavity 22 is opened in the lower mold 4, and a top mold plate 18 is arranged in the inner cavity 22. The top mold plate 18 passes through the upper part of the inner cavity and slides up and down to be connected to the inner cavity 22, so as to lift the product from the lower mold 4. A top mold driving member for driving the top mold plate 18 to rise and fall is also arranged in the inner cavity 22;

[0043] In this embodiment, the top mold driving member includes an intermediate gear 19 connected in the inner cavity 22, one side of the intermediate gear 19 is meshed with the top mold plate 18, and the top mold plate 18 is driven to rise and fall by rotating the intermediate gear 19, which can be actively driven to rotate by a motor or the like;

[0044] In this embodiment, the other side of the intermediate gear 19 is meshed with the reverse thrust plate 20. The lower end of the reverse thrust plate 20 passes through the lower side of the inner cavity 22, and the upper end is fixed with a second spring 21. The upper and lower ends of the second spring 21 are respectively connected to the inner top wall of the inner cavity 22 and the upper end of the reverse thrust plate 20. After the lower mold 4 rotates upward and leaves the support block 17, the second spring 21 drives the reverse thrust plate 20 to descend and extend out of the lower mold 4, and drives the top mold plate 18 to rise through the intermediate gear 19, so as to lift the product from the lower mold 4.

[0045] The top plate 18 and the reverse thrust plate 20 respectively penetrate the upper and lower sides of the inner cavity 22 to guide the upward and downward sliding direction thereof. When the reverse thrust plate 20 extends out of the lower die 4, the top plate 18 is also extended out of the lower die 4 by driving the intermediate gear 19. The top plate 18 and the reverse thrust plate 20 can also be connected to the inner cavity 22 through corresponding T-shaped blocks to further guide the upward and downward sliding direction thereof.

[0046] The lower mold 4 rotates downward until it abuts against the support block 17 (i.e., it is in a flush state and lies flat on the support block 17). The support block 17 pushes the reverse thrust plate 20 to overcome the force of the second spring 21 and move upward and retract into the lower mold 4. At this time, the second spring 21 is compressed, and the reverse thrust plate 20 drives the top mold plate 18 to descend through the intermediate gear 19 until the top mold plate 18 is flush with the upper surface (mold core) of the lower mold 4, waiting for injection molding.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions should also be deemed to fall within the protection scope of the technical solution of the present invention.

Claims

1. An injection mold with convenient demoulding, characterized in that: The device comprises a main body, in which an upper die and a lower die are arranged, and a lifting drive member for driving the upper die to move up and down is also arranged in the main body; one side of the lower die is connected to a rotating shaft and is rotatably connected to the main body of the device through the rotating shaft, and the other side is placed on a supporting block, and a rotating drive member is also connected in the main body of the device, and the rotating member drives the lower die to rotate upward from the upper side of the supporting block to facilitate mold removal.

2. The convenient demoulding injection mold according to claim 1, characterized in that: The lifting drive member comprises a cylinder connected to the device body, and an output end of the cylinder is downwardly connected to the upper mold.

3. The convenient demoulding injection mold according to claim 1 or 2, characterized in that: The rotary drive member comprises a first gear coaxially connected to the rotary shaft, the first gear is meshed with a toothed plate, and the toothed plate drives the lower die to rotate by moving along its own length direction.

4. The convenient demoulding injection mold according to claim 3, characterized in that: The tooth plate is arranged vertically and is connected to the main body of the device by sliding up and down. A support plate is connected to one side of the tooth plate. The upper mold is connected to a pallet, which is located directly below the support plate. After the upper mold rises upward, the tooth plate is driven upward by the pallet. The tooth plate moves upward and drives the lower mold to rotate upward from the upper side of the support block.

5. The convenient demoulding injection mold according to claim 4, characterized in that: The device body is also connected with a first spring, which drives the tooth plate downward, and the tooth plate moves downward to drive the lower mold to rotate downward until it abuts against the upper side of the support block.

6. The convenient demoulding injection mold according to claim 5, characterized in that: The device body is connected with a fixed cylinder, the top end of the tooth plate is connected with a movable plug, the movable plug is slidably arranged in the fixed cylinder, and the two ends of the first spring are respectively in contact with the lower side of the upper end plate of the fixed cylinder and the upper side of the movable plug.

7. The convenient demoulding injection mold according to claim 1, characterized in that: The lower mold is provided with an inner cavity, in which a top mold plate is provided. The top mold plate passes through the upper side of the inner cavity and slides up and down to be connected to the inner cavity, so as to lift the product from the lower mold. A top mold driving member for driving the top mold plate to rise and fall is also provided in the inner cavity.

8. The convenient demoulding injection mold according to claim 7, characterized in that: The top mold driving member comprises an intermediate gear, one side of which is meshed with the top mold plate, and the top mold plate is driven to rise and fall by rotating the intermediate gear.

9. The convenient demoulding injection mold according to claim 8, characterized in that: The side of the intermediate gear away from the top template is meshed with the reverse thrust plate, and a second spring is provided on the upper end of the reverse thrust plate. The second spring drives the reverse thrust plate to descend, and drives the top template to rise through the intermediate gear to lift the product from the lower mold.

10. The injection mold with convenient demoulding according to claim 9, characterized in that: The lower end of the reverse thrust plate passes through the lower side of the lower mold. When the lower mold rotates downward until it abuts against the support block, the support block pushes the reverse thrust plate to overcome the force of the second spring and move upward, and drives the top mold plate to descend through the intermediate gear until the top mold plate is flush with the upper surface of the lower mold.

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