Molding die of toothbrush

Abstract

The utility model relates to a toothbrush forming die which comprises a bottom plate, a fixed lower die plate, a first movable lower die plate, a second movable lower die plate, a third upper die plate, a second upper die plate and a first upper die plate from bottom to top. The lower mold core plate penetrates through the second movable lower mold plate and can slide up and down relative to the second movable lower mold plate, a lower mold cavity is formed in the upper end face of the lower mold core plate, an upper mold core plate is installed on the third upper mold plate, an upper mold cavity is formed in the lower end face of the upper mold core plate, and the upper mold core plate communicates with an injection molding mechanism. The multi-section mold splitting process is adopted, the lower mold surface of the toothbrush head is firstly separated from the toothbrush head, and then the upper mold surface and the side mold surface are separated from the toothbrush head, so that the mold surface separation of a relatively complicated structural surface can be completed, and no film is adhered.

Description

Technical Field

[0001] The utility model relates to a forming mould for a toothbrush. Background Art

[0002] An electric toothbrush usually includes a separate handle and a brush head. The handle contains a power source and a motor. The motor is equipped with a gear rod extending from the handle, and the brush head is equipped with soft bristles that come into direct contact with the teeth when brushing. The brush head is inserted into the gear rod of the handle. When the motor is running, the motor drives the brush head to vibrate, thereby realizing the brushing function of the electric toothbrush.

[0003] The molding mold of a toothbrush is a tool used to produce the toothbrush head, which is usually made of plastic. This mold has a precise size and shape to ensure that the toothbrush head produced meets the design requirements.

[0004] The molding mold of a toothbrush usually consists of multiple parts, including the cavity, gate, runner and ejector system. The cavity is the part of the mold used to form the toothbrush body, the gate is the feed port during injection molding, the runner is the channel connecting the gate and the cavity, and the ejector system is the mechanism used to eject the toothbrush head from the cavity.

[0005] When using a mold to produce a toothbrush head, the raw material is first heated and melted, and then the molten plastic is injected into the mold cavity through an injection machine. After cooling and solidification, the mold is opened and the molded toothbrush head is taken out. During the entire production process, the quality and precision of the mold have an important impact on the quality and production efficiency of the toothbrush head.

[0006] The toothbrush head of an electric toothbrush has a relatively complex structure and is often difficult to demould due to various reasons. Utility Model Content

[0007] In order to overcome the disadvantage that the existing toothbrush molding mold is difficult to demould, the utility model provides a toothbrush molding mold.

[0008] The utility model solves the technical problem by a technical solution: a toothbrush forming mold, which comprises, from bottom to top, a bottom plate, a fixed lower template, a first movable lower template, a second movable lower template, a third upper template, a second upper template, and a first upper template, wherein the first movable lower template is provided with a lower mold core plate, the lower mold core plate passes through the second movable lower template and can slide up and down relative to the second movable lower template, the upper end surface of the lower mold core plate is provided with a lower mold cavity, the upper mold core plate is provided with an upper mold cavity on the lower end surface of the upper mold core plate, and the upper mold core plate is connected to an injection molding mechanism; the second movable lower template is provided with a A lateral demolding mechanism, the lateral demolding mechanism includes a side mold core plate group located on one side of the lower mold core plate, the side of the side mold core plate group is provided with a side mold cavity, the rear upper end of the side mold core plate group is obliquely provided with a demolding slope, the third upper mold plate is provided with a support block at the position of the demolding slope, the front lower end of the support block is provided with a support slope that can slide obliquely with the demolding slope; the lateral demolding mechanism also includes a side demolding cylinder for pulling out the side mold core plate group; a demolding rod driven by a demolding cylinder is passed through the bottom plate, the fixed lower mold plate and the first movable lower mold plate, and the upper end of the demolding rod supports the second movable lower mold plate.

[0009] A preferred side mold core plate group includes a side mold core fixing block fixed on a second movable lower mold plate, a slidably arranged side mold core slider, and a side mold core intermediate block fixedly connected to the side mold core slider, wherein a partial side mold cavity is provided on the side mold core fixing block, and the demolding slope is located on the side mold core slider.

[0010] In order to facilitate the discharge of gas in the mold cavity in the mold, the middle block of the side mold core is provided with an air outlet connected to the side mold cavity.

[0011] Furthermore, an air outlet passage connected to the air outlet hole is provided on the side mold core slider.

[0012] To facilitate the replacement of the support block, the support block is independently arranged in a support block installation groove on a third upper template.

[0013] In order to facilitate the movement of the side mold core slider, a slider groove is provided on the second movable lower mold plate, the side mold core slider is slidably arranged in the slider groove, and a lubrication plate is provided on the bottom surface of the slider groove.

[0014] The side mold core slider is further limited, and a guide rod is provided at the rear end of the side mold core slider.

[0015] In order to prevent the product from adhering to the mold cavity during demolding, a demolding auxiliary mechanism is also hinged on the third upper template, and the demolding auxiliary mechanism includes a fork hinged on the third upper template, a hook is provided on the head of the fork, and a sliding rod is fixed on the fork; a hanging block and a step block are provided on the first movable lower template on the action path of the fork, the lower side of the hanging block is a mounting surface and the upper end is an inclined surface; the hook slides up and hangs on the hanging block, and the sliding rod encounters the step block to drive the fork to tilt up, so that the hook will detach from the hanging block and move upward.

[0016] A preferred embodiment of a shift fork comprises two fork heads, each fork head has one hook, and the sliding rod is between the two fork heads.

[0017] A preferred embodiment of a step block is that the step block is located on a step bar, and the step bar is provided with slopes at the front and rear of the step block.

[0018] When the utility model is used, after the mold is in a mold-closing state, the injection molding mechanism injects gas into the toothbrush head cavity composed of the upper mold cavity, the lower mold cavity and the side mold cavity. The injection molding enters from the head of the toothbrush head and then gradually enters the side mold cavity. The gas is discharged from the exhaust hole connected to the side mold cavity.

[0019] When the injection molding is completed, under the action of the demolding auxiliary mechanism, the mold will produce a demolding vibration to complete the auxiliary demolding. Specifically, in the first stage, the demolding rod head moves upward to drive all the templates above the second movable lower template. During this period, the lower mold cavity on the lower mold core plate peels off the toothbrush head until the hook on the second movable fork hooks the hanging block on the first movable lower template, and the second movable lower template also moves upward with the first movable lower template. Then the sliding rod on the fork encounters the step block and rises, and the hook is separated from the hanging block, and the second movable lower template moves downward. The interval from the hook encountering the hanging block to the hook being lifted and separated from the hanging block is called demolding vibration, and then enters the third stage. The side demolding cylinder drives the side mold core slider to move, and the demolding slope lifts the supporting slope. The third lower template is separated from the second movable lower template, and the upper cavity surface of the toothbrush head is separated from the toothbrush head, and then the toothbrush head can be taken out.

[0020] The beneficial effects of the utility model are as follows: 1. It has a multi-stage mold separation process. First, the lower mold surface of the toothbrush head is separated from the toothbrush head, and then the upper mold surface and the side mold surface are separated from the toothbrush head. It can complete the mold surface separation of a relatively complex structure without sticking to the film. 2. It has a demoulding auxiliary mechanism. In the early stage of demoulding, a demoulding vibration will be formed to help the toothbrush head to smoothly escape from the lower mold cavity and improve the smoothness of separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional schematic diagram of an embodiment.

[0022] Figure 2 is a schematic diagram of an embodiment.

[0023] Figure 3 It is a schematic diagram of a mold of an embodiment.

[0024] Figure 4 The figure is a schematic diagram of the mold core after the lower mold surface and the toothbrush head are separated in one embodiment.

[0025] Figure 5 It is a schematic diagram of the mold core after the lower mold surface and the toothbrush head are separated in another direction of an embodiment.

[0026] Figure 6 The figure is a schematic diagram of a mold core after the three mold surfaces and the toothbrush head are separated in an embodiment. DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0028] Combined with Figures 1 to 6 A toothbrush molding mold comprises, from bottom to top, a bottom plate 1, a fixed lower template 2, a first movable lower template 3, a second movable lower template 4, a third upper template 5, a second upper template 6, and a first upper template 7. A lower mold core plate 8 is installed on the first movable lower template 3. The lower mold core plate 8 passes through the second movable lower template 4 and can slide up and down relative to the second movable lower template 4. A lower mold cavity is provided on the upper end surface of the lower mold core plate 8. An upper mold core plate 9 is installed on the third upper template 5. An upper mold core plate 9 is provided on the lower end surface of the upper mold core plate 9. The upper mold core plate 9 is connected to an injection molding mechanism 10. A lateral demolding mechanism 11 is provided on the second movable lower template 4. The lateral demolding mechanism 11 is provided on the second movable lower template 4. The structure 11 includes a side mold core plate group 12 located on one side of the lower mold core plate 8, and a side mold cavity is provided on the side of the side mold core plate group 12. A demolding slope 13 is obliquely provided at the upper rear end of the side mold core plate group 12. A support block 14 is provided on the third upper mold plate 5 at the position of the demolding slope 13, and a support slope that can slide obliquely with the demolding slope 13 is provided at the front lower end of the support block 14; the side demolding mechanism 11 also includes a side demolding cylinder 15 for pulling out the side mold core plate group 12; a demolding rod 16 driven by a demolding cylinder is passed through the bottom plate 1, the fixed lower mold plate 2, and the first movable lower mold plate 3, and the upper end of the demolding rod 16 supports the second movable lower mold plate 4.

[0029] A preferred side mold core plate group 12 includes a side mold core fixing block 17 fixed on the second movable lower mold plate 4, a slidably arranged side mold core slider 18, and a side mold core intermediate block 19 fixed to the side mold core slider 18, wherein a partial side mold cavity is provided on the side mold core fixing block 17, and the demolding slope 13 is located on the side mold core slider 18.

[0030] In order to facilitate the discharge of gas in the mold cavity, the side mold core middle block 19 is provided with an air outlet 20 connected to the side mold cavity.

[0031] Furthermore, an air outlet channel 21 connected to the air outlet hole 20 is provided on the side mold core slider 18 .

[0032] To facilitate replacement of the support block 14 , the support block 14 is independently arranged in a support block 14 installation groove on a third upper mold plate 5 .

[0033] In order to facilitate the movement of the side mold core slider 18 , a slider groove 22 is provided on the second movable lower mold plate, and the side mold core slider 18 is slidably arranged in the slider groove 22 , and a lubrication plate 23 is provided on the bottom surface of the slider groove 22 .

[0034] The side mold core slider 18 is further limited, and a guide rod 24 is provided at the rear end of the side mold core slider 18.

[0035] In order to prevent the product from adhering to the mold cavity during demolding, a demolding auxiliary mechanism 25 is hinged on the third upper template 5, and the demolding auxiliary mechanism 25 includes a fork 26 hinged on the third upper template 5, a hook 27 is provided at the head of the fork 26, and a sliding rod 28 is fixed on the fork 26; a hanging block 29 and a step block 30 are provided on the first movable lower template 3 on the action path of the fork 26, the lower side of the hanging block 29 is a mounting surface and the upper end is an inclined surface; the hook 27 slides up and hangs on the hanging block 29, and the sliding rod 28 encounters the step block 30 to drive the fork 26 to tilt up, so that the hook 27 will break away from the hanging block 29 and move upward.

[0036] A preferred embodiment of the shift fork 26 is that the shift fork 26 has two fork heads, each of the fork heads has one hook 27, and the sliding rod 28 is between the two fork heads.

[0037] A preferred embodiment of a step block 30 is that the step block 30 is located on a step bar 31 , and the step bar 31 is provided with slopes at the front and rear of the step block 30 .

[0038] When this embodiment is used, after the mold is in the mold closing state, the injection molding mechanism 10 is used to inject the gas into the toothbrush head cavity composed of the upper mold cavity, the lower mold cavity and the side mold cavity. The injection molding enters from the head of the toothbrush head 32, and then gradually enters the side mold cavity. The gas is discharged from the exhaust hole connected to the side mold cavity.

[0039] When the injection molding is completed, under the action of the demolding auxiliary mechanism, the mold will generate a demolding vibration to complete the auxiliary demolding. Specifically, in the first stage, the head of the demolding rod 16 moves upward to drive all the templates above the second movable lower template 4 to move upward. During this period, the lower mold cavity on the lower mold core plate 8 peels off the toothbrush head 32 until the hook 27 on the second movable fork 26 hooks the hanging block 29 on the first movable lower template 3, and the second movable lower template 4 also moves upward with the first movable lower template 3, and then the sliding rod 28 on the fork 26 encounters the step block 30 and rises, and the hook 27 is separated from the hanging block 29, and the second movable lower template 4 moves downward accordingly. The interval from the hook 27 encountering the hanging block 29 to the hook 27 being lifted and separated from the hanging block 29 is called demolding vibration, and then enters the third stage, the side demolding cylinder 15 drives the side mold core slider 18 to move, the demolding slope 13 lifts the supporting slope, the third lower template is separated from the second movable lower template 4, and the upper cavity surface of the toothbrush head 32 is separated from the toothbrush head, and then the toothbrush head can be taken out.

[0040] The beneficial effects of this embodiment are as follows: 1. It has a multi-stage mold separation process. First, the lower mold surface of the toothbrush head is separated from the toothbrush head, and then the upper mold surface and the side mold surface are separated from the toothbrush head. It can complete the mold surface separation of a relatively complex structure without sticking to the film. 2. It has a demoulding auxiliary mechanism. In the early stage of demoulding, a demoulding vibration will be generated to help the toothbrush head to smoothly escape from the lower mold cavity, thereby improving the smoothness of separation.

Claims

1. A toothbrush forming mold, comprising, from bottom to top, a bottom plate, a fixed lower mold, a first movable lower mold, a second movable lower mold, a third upper mold, a second upper mold, and a first upper mold, characterized in that: The first movable lower template is provided with a lower mold core plate, and the lower mold core plate passes through the second movable lower template and can slide up and down relative to the second movable lower template, and the upper mold core plate is provided with a lower mold cavity on the upper end surface of the lower mold core plate, and the upper mold core plate is provided with an upper mold cavity on the lower end surface of the upper mold core plate and the upper mold core plate is connected to the injection molding mechanism; a lateral demolding mechanism is provided on the second movable lower template, and the lateral demolding mechanism includes a side mold core plate group located on one side of the lower mold core plate, and the side of the side mold core plate group is provided with a side mold cavity, and the rear upper end of the side mold core plate group is obliquely provided with a demolding inclined surface, and the third upper template is provided with a support block at the position of the demolding inclined surface, and the front lower end of the support block is provided with a support inclined surface that can slide obliquely with the demolding inclined surface; the lateral demolding mechanism also includes a side demolding cylinder for pulling out the side mold core plate group of the driving plate; a demolding rod driven by a demolding cylinder is passed through the bottom plate, the fixed lower template, and the first movable lower template, and the upper end of the demolding rod supports the second movable lower template.

2. The toothbrush molding die according to claim 1, characterized in that: The side mold core plate group includes a side mold core fixing block fixed on the second movable lower mold plate, a slidably arranged side mold core slider, and a side mold core intermediate block fixedly connected to the side mold core slider. A partial side mold cavity is provided on the side mold core fixing block, and the demolding slope is located on the side mold core slider.

3. The forming mold of the toothbrush according to claim 2, characterized in that: The middle block of the side mold core is provided with an air outlet hole connected to the side mold cavity.

4. The forming mold of the toothbrush according to claim 3, characterized in that: The side mold core sliding block is provided with an air outlet passage connected to the air outlet hole.

5. The toothbrush molding die according to claim 1, characterized in that: The support block is independently arranged in a support block installation groove on a third upper template.

6. The toothbrush forming mold according to claim 2, characterized in that: A slider groove is arranged on the second movable lower mold plate, the side mold core slider is slidably arranged in the slider groove, and a lubrication plate is arranged on the bottom surface of the slider groove.

7. The toothbrush molding die according to claim 2, characterized in that: A guide rod is arranged at the rear end of the side mold core sliding block.

8. The toothbrush molding die according to claim 1, characterized in that: The third upper template is also hinged with a demolding auxiliary mechanism, which includes a fork hinged on the third upper template, a hook is provided at the head of the fork, and a sliding rod is fixed on the fork; a hanging block and a step block are provided on the first movable lower template on the action path of the fork, the lower side of the hanging block is a mounting surface and the upper end is an inclined surface; the hook slides up and hangs on the hanging block, and the sliding rod encounters the step block to drive the fork to tilt up, so that the hook will detach from the hanging block and move upward.

9. The toothbrush molding die according to claim 8, characterized in that: The shift fork has two forks, each of which has one hook, and the sliding rod is between the two forks.

10. The toothbrush molding die according to claim 8, characterized in that: The step block is located on a step strip, and the step strip is provided with slopes at the front and rear of the step block.

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