CN116423770A

CN116423770A - Demoulding mechanism

Info

Publication number: CN116423770A
Application number: CN202310147398.0A
Authority: CN
Inventors: 杨德峰; 刘强; 宋西斌; 刘福泉; 杜飞; 曹金柱; 张现宝
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2023-02-21
Filing date: 2023-02-21
Publication date: 2023-07-14

Abstract

The invention discloses a demolding mechanism, which comprises a female mold plate, wherein the female mold plate comprises a product cavity, a sliding cavity and a clamping structure, the clamping structure is arranged in the sliding cavity in a sliding manner, a product runner is arranged in the clamping structure, the product runner penetrates through the clamping structure and is communicated with the product cavity, the clamping structure comprises a first movable piece, a second movable piece and a limiting block which are sequentially arranged along the side wall of the sliding cavity, and a material handle formed in the product runner drives the first movable piece and the second movable piece to move in a direction away from the product cavity until the first movable piece abuts against the limiting block to complete first-stage demolding; the material handle drives the second movable part to move in a direction away from the product cavity until the second movable part abuts against the limiting block to complete demolding of the second section. The demolding mechanism utilizes the matching relation among the first movable piece, the second movable piece and the limiting block to divide the acting force to be overcome by the material in demolding into three sections, so that the problems of long demolding period and high cost caused by insufficient cooling of the material are avoided.

Description

Demoulding mechanism

Technical Field

The invention relates to the technical field of mold preparation, in particular to a demolding mechanism.

Background

The mold is an indispensable important tool in injection molding, and the injection molding is a processing method for injecting a hot-melt plastic material into a closed cavity with a required shape in the mold at high speed, cooling and solidifying the plastic material, opening the mold, and ejecting the solidified plastic product to obtain a molded product. The injection molding processing method has the characteristics of low molding cost, short molding period, simple molding process, easiness in molding plastic products with complex shapes and the like, so that the injection molding processing method is extremely widely applied to the application field of plastic products.

The conventional three-plate mold glue feeding mode in the plastic mold has the advantages that the demolding period is long under the action of the material pulling pin, the material is not completely cooled, the post shrinkage is insufficient, the material is in an expanded state, so that the holding force between the material and a product runner is large, the sufficient cooling time is needed to ensure the demolding effectiveness, the injection molding period is long, and the overall injection molding economy is influenced.

Disclosure of Invention

The invention aims to provide a demolding mechanism with simple structure and convenient operation, which realizes the purpose of three-section demolding through the cooperation between a first movable part, a second movable part and a limiting block, and reduces the holding force between a material handle and a product runner in a layering manner by utilizing a layer-by-layer stripping structure, so that the holding force is separated in three sections, the injection molding cycle is finally improved, and the mass production economy is improved.

In order to achieve the above purpose, the present invention provides the following technical solutions:

the demolding mechanism comprises a female mold plate, wherein the female mold plate comprises a product cavity, a sliding cavity and a clamping structure, the clamping structure is arranged in the sliding cavity in a sliding manner, a product runner is arranged in the clamping structure, the product runner penetrates through the clamping structure and is communicated with the product cavity, the clamping structure comprises a first movable part, a second movable part and a limiting block which are sequentially arranged along the side wall of the sliding cavity,

a material handle is formed in the product runner, and drives the first movable piece and the second movable piece to move in a direction away from the product cavity until the first movable piece abuts against the limiting block to complete first section demolding; the material handle drives the second movable part to move in a direction away from the product cavity until the second movable part abuts against the limiting block to complete second section demolding.

Preferably, the limiting block comprises a first step part, and the material handle drives the first movable part and the second movable part to move in a direction away from the product cavity until the first movable part abuts against the vertical side wall of the first step part to complete first section demolding.

Preferably, the limiting block comprises a second step part, the first step part and the second step part are sequentially arranged along the direction away from the product cavity, the distance between the first step part and the second step part and the product runner is sequentially reduced, and the material handle drives the second movable part to move along the direction away from the product cavity until the second movable part is abutted against the vertical side wall of the second step part to complete second section demolding.

Preferably, the female die plate is located on the bottom surface of the sliding cavity and is sequentially provided with a third step portion, a fourth step portion and a fifth step portion, and the heights of the third step portion, the fourth step portion and the fifth step portion are sequentially reduced.

Preferably, the first movable part is slidably arranged on the third step part, the limiting block is fixedly arranged on the fifth step part, the second movable part is slidably arranged on the second step part, and the first movable part and the second movable part are abutted to form the product runner before demolding.

Preferably, the first movable part comprises a sliding part and a protruding part, the sliding part is arranged on the third step part in a sliding mode, the protruding part extends to the horizontal side wall of the fourth step part and is not contacted with the horizontal side wall of the fourth step part, and the material handle drives the first movable part and the second movable part to move in a direction away from the product cavity until the protruding part abuts against the vertical side wall of the first step part.

Preferably, the second movable part comprises a groove, the bottom surface of the groove is slidably arranged on the second step part, and the handle drives the second movable part to move in the direction away from the product cavity until the vertical side wall of the groove abuts against the vertical side wall of the second step part.

Preferably, the distance between the protruding portion and the vertical side wall of the first step portion before demolding is a, the distance between the vertical side wall of the groove and the vertical side wall of the second step portion is b, and a < b.

Preferably, a driving plate is arranged on one side, far away from the product cavity, of the female die plate, a material pulling pin is arranged on the driving plate, and the material pulling pin is fixed on the driving plate and connected with the material handle.

Preferably, the driving plate comprises a stirring plate and a panel, the stirring plate and the panel are sequentially arranged along the direction far away from the mother template, and the pulling pin is fixed on the panel and penetrates through the stirring plate to be connected with the material handle.

Compared with the prior art, the invention has the advantages and technical effects that:

according to the scheme provided by the invention, the demoulding process is divided into three sections, and the process of overcoming the acting force is also divided into three sections, so that the demoulding effect is optimized under the condition of the same cooling and cycle effect, and the purposes of reducing the cycle and improving the mass production economy are achieved.

Drawings

FIG. 1 is a schematic view of a demolding mechanism;

FIG. 2 is an enlarged schematic view of a demolding mechanism;

fig. 3 is a schematic diagram of an engaging structure of the demolding mechanism.

In the figure: 1. a master template; 2. a kick-out plate; 3. a panel; 11: a clamping structure; 12: a product cavity; 13: a sliding cavity; 14. a product flow channel; 15. a material handle; 16. a third step portion; 17. a fourth step portion; 18. a fifth step portion; 31. a material pulling pin; 32. a guide post; 111. a first movable member; 112. a second movable member; 113. a limiting block; 1111. a sliding part; 1112. a protruding portion; 1121. a groove; 1131. a first step portion; 1132. a second step portion.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and examples.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

Referring to fig. 1-3, in the embodiment of the invention, the demolding mechanism includes a master mold plate 1, the master mold plate 1 includes a clamping structure 11, a product cavity 12 and a sliding cavity 13, the clamping structure 11 is slidably disposed in the sliding cavity 13, a product runner 14 is disposed in the clamping structure 11, the product runner 14 penetrates through the clamping structure 11 and is communicated with the product cavity 12, the clamping structure 11 includes a first movable member 111, a second movable member 112 and a limiting block 113 sequentially disposed along a side wall of the sliding cavity 13, during demolding, a material handle 15 is formed in the product runner 14 by pulling under the action of an external force, and the material handle 15 drives the first movable member 111 and the movable member 112 to move in a direction away from the product cavity 12 until the first movable member 111 abuts against the limiting block 113 to complete the first section demolding; the material handle 15 drives the second movable piece 112 to move continuously in a direction away from the product cavity 12 until the second movable piece 112 abuts against the limiting block 113 to complete the second section demoulding.

Specifically, in the embodiment shown in fig. 1-3, the first movable member 111 is disposed at one end of the sliding cavity 13 near the product cavity 12, the second movable member 112 is disposed at one end of the sliding cavity 13 far away from the product cavity 12, the first movable member 111 and the second movable member 112 are abutted before demolding, the product runner 14 penetrates through the first movable member 111 and the second movable member 112 to communicate with the product cavity 12, the material handle 15 is pulled out from the product runner 14 during demolding, because the product runner 14 penetrates through the first movable member 111 and the second movable member 112, the material handle formed in the product runner can generate holding force on the first movable member and the second movable member, when the material handle 15 is pulled out, the holding force between the material handle 15 and the inner side wall of the product runner 14 can drive the first movable member 111 and the second movable member 112 to move far away from the product cavity 12, the purpose of sectional demolding can be achieved by utilizing the limiting effect of the limiting block 113, the holding force of the material handle 15 is reduced, and the demolding time is shortened.

In this embodiment, the limiting block 113 is provided with a first step portion 1131 and a second step portion 1132, wherein the first step portion 1131 is used for controlling the first stage demolding process, and the second step portion 1132 is used for controlling the second stage demolding process. The first step portion 1131 and the second step portion 1132 are sequentially arranged along the direction away from the product cavity 12, that is, the first step portion 1131 is arranged at one side close to the product cavity 12, and the second step portion 1132 is arranged at one side away from the product cavity 12; meanwhile, the distances between the first step 1131 and the second step 1132 and the product flow channel 14 are sequentially reduced, and further, the second step 1132 is disposed at the top of the first step 1131. It should be noted that, in this embodiment, the limiting block 113 is an integral structure, in other embodiments, may be a split structure, and meanwhile, the step structure provided by the limiting block 113 is mainly used for controlling the demolding process in a segmented manner, each step corresponds to one demolding process, so that the holding force of the material handle is reduced in a layered manner, and it can be understood that the limiting block 113 only needs to realize the segmented control of the demolding process, and the shape of the limiting block 113 is not limited.

In this embodiment, to better support the engaging structure 11, the female mold plate 1 is provided with a third step portion 16, a fourth step portion 17 and a fifth step portion 18 on the bottom surface of the sliding cavity 13, and the third step portion 16, the fourth step portion 17 and the fifth step portion 18 are sequentially arranged along the direction away from the product cavity 12, that is, the third step portion 16 is arranged on the side closest to the product cavity 12, the fifth step portion 18 is arranged on the side furthest from the product cavity 12, and the fourth step portion 17 is arranged in the middle of the third step portion 16 and the fifth step portion 18; and the distances between the third step portion 16, the fourth step portion 17 and the fifth step portion 18 and the central axis of the product flow channel 14 are sequentially increased, that is, the heights of the third step portion 16, the fourth step portion 17 and the fifth step portion 18 are sequentially reduced. The purpose of setting up three step portion is the block structure 11 in bearing slide cavity 13 that can be better, and auxiliary drawing of patterns process is accomplished smoothly.

In the present embodiment, the first movable member 111 includes a sliding portion 1111 and a protruding portion 1112, the sliding portion 1111 being slidably disposed on the third step portion 16, wherein a bottom surface of the sliding portion 1111 is disposed on a horizontal side wall of the third step portion 16; the protruding portion 1112 protrudes toward and does not contact the horizontal side wall of the fourth step portion 17, and the vertical side wall of the pre-mold release protruding portion 1112 and the vertical side wall of the third step portion 16 contact each other. The sliding portion 1111 may cooperate with the third step portion 16 to complete the sliding process of the first movable member 111 when the first stage demolding is completed, and the protrusion 1112 may abut against the stopper 113 to prevent the sliding stroke of the first movable member 111, thereby completing the first stage demolding process.

In this embodiment, the second movable member 112 includes a groove 1121, the opening of the groove 1121 faces the second step portion 1132, and the bottom surface of the groove 1121 is slidably disposed on the horizontal side wall of the second step portion 1132, it can be understood that, when the second section is demolded, the second step portion 1132 integrally extends into the groove 1121, and the handle 15 drives the second movable member 112 to move in a direction away from the product cavity 12, until the bottom surface of the groove 1121 slides on the horizontal side wall of the second step portion 1132 until the vertical side wall of the groove 1121 abuts against the second step portion 1132, and the stopper 113 can block the stroke of the second movable member 112 through the vertical side wall of the second step portion 1132 and the vertical side wall of the groove 1121, thereby completing the second section demolding process.

In the present embodiment, the structure of the first movable member 111 and the second movable member 112 is only one, and the specific structure is not limited, so that the purpose of sectional demolding can be achieved.

In this embodiment, the limiting block 113 is fixedly disposed on the fifth step portion 18, wherein a fixing member is disposed on a vertical side wall of the fifth step portion 18 to fix the limiting block 113 on the fifth step portion 18, the limiting block 113 is disposed on a horizontal side wall of the fifth step portion 18, and the fixed limiting block 113 can achieve the purpose of sectional demolding by blocking the strokes of the first moving member 111 and the second moving member 112.

It can be understood that the distance between the protrusion 1112 before demolding and the vertical sidewall of the first step 1131 is a, the distance between the vertical sidewall of the groove 1121 and the vertical sidewall of the second step 1132 is b, and a < b exists, that is, when the material handle 15 drives the protrusion 1112 to abut against the first step 1131 in the demolding process, the vertical sidewall of the groove 1121 still does not contact the vertical sidewall of the second step 1132, at this time, the demolding process of the first section is finished, and the distance between the groove 1121 and the second step 1132 is a space for demolding of the second section, so that the material handle 15 can continuously drive the second movable member 112 to move in a direction away from the product cavity 12 until the vertical sidewall of the groove 1121 abuts against the vertical sidewall of the second step 1132, thereby completing demolding of the second section.

In this embodiment, the demolding mechanism further includes a stripper plate 2 and a panel 3, where the stripper plate 2 and the panel 3 are sequentially disposed along a direction away from the mother template 1, that is, the stripper plate 2 is disposed on a side close to the mother template 1, the panel 3 is disposed on a side away from the mother template 1, and guide posts 32 are disposed between the mother template 1, the stripper plate 2 and the panel 3 in a penetrating manner, and the guide posts 32 provide for the mother template 1, the stripper plate 2 and the panel 3 to reciprocate during demolding; the panel 3 is fixedly provided with a material pulling pin 31, the material pulling pin 31 penetrates through the material pulling plate 2 to connect the material handle 15, and the material pulling pin 31 is utilized to drag the material handle 15 to move in a direction away from the master template 1 until the demoulding process is completed.

When the mold is used, the pulling pin 31 drives the material handle 15 to move in a direction away from the female mold plate 1, the material handle 15 overcomes the holding force between the material handle 15 and the product runner 14 and is outwards separated from the product runner 14, the first movable piece 111 and the second movable piece 112 move together with the material handle 15 in a direction away from the product cavity 12 under the action of the holding force, when the mold moves, the bottom surfaces of the sliding part 1111 and the groove 1121 slide on the horizontal side wall of the third step part 16 and the horizontal side wall of the second step part 1132 respectively until the protruding part 1112 abuts against the vertical side wall of the first step part 1131, at the moment, the first movable piece 111 cannot continue to move together with the material handle 15 due to the blocking of the first step part 1131, and the first-stage demolding process is finished; the material handle 15 overcomes the resistance and continuously drives the second movable piece 112 to move in a direction away from the product cavity 12 until the vertical side wall of the groove 1121 is abutted against the vertical side wall of the second step portion 1132, the second movable piece 112 cannot move along with the material handle 15 under the blocking of the second step portion 1132, and the second section demoulding process is finished; the handle 15 continues to move away from the product cavity 12 against the resistance until the handle 15 is completely separated from the product runner 14, at this time, the master template 1 and the deflector 2 are pulled apart by a corresponding distance, the deflector 2 and the panel 3 are pulled apart by the application of force, the handle 15 is separated from the pulling pin 31, and the demolding process is finished.

The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims

1. The demolding mechanism comprises a female mold plate, and is characterized in that the female mold plate comprises a product cavity, a sliding cavity and a clamping structure, the clamping structure is arranged in the sliding cavity in a sliding manner, a product runner is arranged in the clamping structure, the product runner penetrates through the clamping structure and is communicated with the product cavity, the clamping structure comprises a first movable part, a second movable part and a limiting block which are sequentially arranged along the side wall of the sliding cavity, wherein,

2. The demolding mechanism according to claim 1, wherein the limiting block comprises a first step portion, and the handle drives the first movable member and the second movable member to move in a direction away from the product cavity until the first movable member abuts against the vertical side wall of the first step portion to complete the first-stage demolding.

3. The demolding mechanism according to claim 2, wherein the stopper includes a second step portion, the first step portion and the second step portion are sequentially disposed along a direction away from the product cavity, and distances between the first step portion and the second step portion and the product runner are sequentially reduced, and the handle drives the second movable member to move in a direction away from the product cavity until the second movable member abuts against a vertical side wall of the second step portion to complete the second-stage demolding.

4. A demolding mechanism according to claim 2 or 3, wherein the female mold plate is provided with a third step portion, a fourth step portion and a fifth step portion in order on the bottom surface of the slide cavity, and the heights of the third step portion, the fourth step portion and the fifth step portion are reduced in order.

5. The demolding mechanism according to claim 4, wherein the first movable member is slidably disposed on the third step portion, the stopper is fixedly disposed on the fifth step portion, the second movable member is slidably disposed on the second step portion, and the first movable member and the second movable member are abutted against each other before demolding to form the product flow passage.

6. The demolding mechanism according to claim 5, wherein the first movable member comprises a sliding portion and a protruding portion, the sliding portion is slidably disposed on the third step portion, the protruding portion extends to the horizontal side wall of the fourth step portion and is not in contact with the horizontal side wall of the fourth step portion, and the handle drives the first movable member and the second movable member to move in a direction away from the product cavity until the protruding portion abuts against the vertical side wall of the first step portion.

7. The demolding mechanism according to claim 5, wherein the second movable member comprises a groove, the bottom surface of the groove is slidably disposed on the second step portion, and the handle drives the second movable member to move in a direction away from the product cavity until the vertical side wall of the groove abuts against the vertical side wall of the second step portion.

8. The demolding mechanism according to claim 6 or 7, characterized in that the distance of the protruding portion from the vertical side wall of the first step portion before demolding is a, the distance of the vertical side wall of the groove from the vertical side wall of the second step portion is b, and a < b.

9. The demolding mechanism as claimed in claim 1, wherein the master mold plate is provided with a driving plate on a side away from the product cavity, and a pulling pin is provided on the driving plate, and is fixed to the driving plate and connected to the handle.

10. The demolding mechanism according to claim 9, wherein the driving plate comprises a stirring plate and a panel, the stirring plate and the panel are sequentially arranged along a direction away from the mother mold, and the pulling pin is fixed on the panel and penetrates through the stirring plate to be connected with the handle.