Open type comfortable handle mold structure

Abstract

The invention discloses an open-type comfortable handle mold structure. The handle is divided into a ring part, a hand-held part, and a connecting belt therebetween. The cross section of the hand-held part is an annular opening structure. A core rod is arranged in the annular opening. The core point of the invention is to drive the core rod after mold opening to form a certain distance H between the annular opening and the mold cavity plate through various mechanical driving structures. The distance can accommodate the peripheral expansion generated when the annular opening is separated from the core rod. The distance can prevent the annular opening from interfering with the mold cavity plate when it is separated from the core rod, or prevent the core rod from interfering with the cavity plate when it is separated from the annular opening. In addition, various mechanical structures are used to change the direction of the annular opening when it is separated from the core rod so that it is closer to the positive direction of demolding or the direction of mold opening, so that the annular opening does not interfere with the cavity plate when it is separated from the core rod. In addition, a ring inner core is arranged to clamp the ring part, so that the annular opening can be pulled by the ring part through the connecting belt when it is separated from the core rod.

Description

Technical Field

[0001] The invention belongs to the technical field of mold structures, and in particular relates to an open-type comfortable handle mold structure. Background Art

[0002] At present, packaging bottles of edible oil, beverages, condiments, etc. on the market all use a handle to facilitate users to hold. This handle is generally composed of a ring part 1, a hand-held part 12, and a connecting belt 11 between them. There are roughly two ways to demould this handle mold on the market:

[0003] One is a handle mold for producing handles with all sides having a positive demoulding slope (see attached Fig.26 ), the hand-held portion 12 is generally an upright sheet (see attached Figure 1 ), which is the most common handle on the market. Each surface of this handle has a positive slope relative to the mold opening direction and the demoulding direction. The demoulding of this handle mold only requires the handle to be ejected normally after the mold is opened to complete a complete demoulding process (see attached Fig.26 ), since all the surfaces have a positive demoulding slope, the handle portion 12 of the handle can only be made into a vertical sheet. When consumers use this structure of handle, they always feel pain when the two ends 13 of the sheet hit their hands, but because of its high production efficiency, simple mold structure, small volume, and low production cost, it has always occupied a leading position in the handle product industry.

[0004] The other is a handle mold for producing a handle with a positive draft angle at the handle loop portion 1 and the connecting belt portion 11, but a negative draft angle at the handle portion 12 (see attached Fig. 27 ), the handle portion of the handle is a ring-shaped opening 14 structure with a U-shaped cross section, and this structure is also one of the ring-shaped opening structure handles of the present invention. The demoulding direction of the U-shaped ring-shaped opening 14 is perpendicular or nearly perpendicular to the mold opening direction. The demoulding method of this handle mold is generally that after the mold is opened, the slider 6 is driven by the driving mechanism 61, and the slider 6 drives the U-shaped inner core rod 4 to slide out, and then the handle is ejected from the mold to complete a complete demoulding step (see attached Fig. 27 ), since the slider 6 and the U-shaped inner core rod 4 do not leave the mold cavity plate during the entire sliding process, that is, the distance from the mold cavity plate is always 0, in order not to hit the mold cavity plate during sliding, the opening width of the U-shaped part of the handle must be designed to be equal to or greater than the maximum thickness of the U-shaped core rod 4. Figure 3), the handle portion 12 is an arc-shaped transition for the part that contacts and bears force with the user's hand, so this kind of handle is not so uncomfortable to carry. However, after actual testing, the inventor found that although the U-shaped bottom is not uncomfortable, the edges of the two ends of the U-shaped opening are still a little uncomfortable. After all, the internal space after the human finger is bent is closer to a full circle, but the overall comfort is much more comfortable than the first one. The disadvantage of the mold of this handle is that the mold must have a slider structure 6 and a mechanical structure 61 for driving the slider. This structure has very high requirements for the precision of the mold, and the mold cost will rise sharply. In addition, the production speed will also drop sharply due to the additional slider drive movement step, and the mold life will be reduced. In addition, the slider 6 and the drive structure 61 will occupy a large volume, so the number of cavities of the same mold length and width cannot be too many, which ultimately leads to a much higher product cost. Therefore, it can only be a niche product on the market and cannot be promoted in large quantities.

[0005] The inventor filed a utility model patent application numbered 202021084876.6 on June 12, 2020 for “an open and comfortable handle that can shrink and expand elastically and automatically fit the shape of the hand”. The handle portion 12 of the handle is a C-shaped annular opening structure (see attached Figure 2 ), which is also a kind of annular opening structure of the present invention. After actual testing by the inventor, it is felt that this C-shaped shape close to a circle is the most suitable shape for the bending of human fingers. No matter how hard you lift, there will be no feeling of pinching the hand by the edge, and as the force increases, the C-shaped annular opening will shrink inward to be more suitable for the bending of human fingers. However, due to the diameter of the C-shaped mandrel 4 (see attached Figure 2 H7 in the figure is larger than the annular opening of the C type (see attached Figure 2 Therefore, if the second slider structure is used, the C-shaped inner core rod 4 will hit the mold cavity when it is pulled out of the C-shaped part. Obviously, it is unreasonable to use the second method to make such a structure with a small opening and a large interior. Of course, there is another method that uses the slider 6 to pull the C-shaped inner core rod 4 out axially from the C-shaped part instead of the C-shaped annular opening 14 (see attached Fig.28), the movement stroke of the slider 6 of this structure must be greater than the axial length of the hand-held part 12. The width of a normal person's palm is basically more than 80MM, so the width of the handle plus the edge width plus the mechanism margin are at least more than 110MM. With such a long slider stroke, plus it is a universal mass-applied product, mold designers basically avoid this design, because the mold cost, volume, production efficiency and product production cost are very high, which is not suitable for mass-production and low-cost production. Regarding the utility model patent of "Open-type comfortable handle that can shrink and expand by elasticity and automatically fit the hand shape" with application number 202021084876.6 submitted by me on June 12, 2020, the inventor also designed the mold demolding structure for this handle first, and made a test mold. After multiple actual production tests, the feasibility was demonstrated before submitting the patent. Therefore, the essence of this handle is that the mold demolding structure must be designed before the handle can be produced. Otherwise, it is like a castle in the air, with only design drawings but no actual production and meaningless. Summary of the invention

[0006] A mold structure of an open-type comfortable handle comprises a mold static cavity plate and a mold dynamic cavity plate, wherein the open-type comfortable handle has an annular opening, and is characterized in that: the mold static cavity plate and the mold dynamic cavity plate are provided with a core rod adapted to the cavity, and the core rod can make a linear or curved relative motion within a demolding spacing from zero to the mold static cavity plate or the mold dynamic cavity plate, so that after the mold is opened, the core rod drives the annular opening to separate from the mold static cavity plate or the mold dynamic cavity plate and form a predetermined spacing H, and this spacing H can prevent the annular opening from interfering with the mold static cavity plate or the mold dynamic cavity plate when it is separated from the core rod, and this spacing H can prevent the core rod from interfering with the mold static cavity plate or the mold dynamic cavity plate when it is separated from the annular opening, and this spacing H can also accommodate the expansion space generated by the annular opening when it is separated from the core rod, and this spacing H can also allow the annular opening to rotate around the core rod or together with the core rod in the mold opening direction without interfering with the mold static cavity plate or the mold dynamic cavity plate.

[0007] The core rod can rotate freely together with the annular opening. After the mold is opened, the direction in which the core rod rotates together with the annular opening tends to the mold opening direction or the positive direction of demolding. The purpose is to ensure that the direction in which the annular opening leaves the core rod does not interfere with the static cavity plate or the dynamic cavity plate of the mold.

[0008] The core rod is designed to be a full circle, and the annular opening can rotate around the core rod or rotate with the core rod. The wall thickness of the annular opening is designed to be thinnest at the opening and becomes thicker towards the middle, so that a predetermined gap is generated between the annular opening and the static cavity plate or the dynamic cavity plate of the mold after the annular opening rotates around the core rod or rotates with the core rod by a predetermined angle. In addition, the direction in which the annular opening is separated from the core rod tends to the mold opening direction without interfering with the static cavity plate or the dynamic cavity plate of the mold.

[0009] The core rod is provided with a spring to assist the core rod in driving the annular opening to quickly leave the static cavity plate or the dynamic cavity plate of the mold and form a distance H when the mold is opened.

[0010] The core rod uses a driving mechanism to directly drive the core rod when opening the mold, driving the annular opening to quickly leave the static cavity plate of the mold or the dynamic cavity plate of the mold and form a distance H.

[0011] The core rod is provided with a push rod to push the core rod to drive the annular opening away from the static cavity plate of the mold or the dynamic cavity plate of the mold and form a distance H.

[0012] After the core rod drives the annular opening to separate from the static cavity plate of the mold or the dynamic cavity plate of the mold and form a distance H, a driving mechanism can be used to drive the core rod to move in a straight line or curve in a set direction.

[0013] The core rod and the ejector rod are installed in the same group, and the ejector rod is provided with a multi-stage ejection mode and a graded ejection handle.

[0014] The collar part and the collar inner core are designed with a concave-convex groove with a drop so that they have a clamping force with each other, the purpose of which is to enable the collar part clamped by the collar inner core to be pulled by the connecting belt when the annular opening is separated from the core rod, and this clamping force is smaller than the ejection force of the mold.

[0015] The beneficial effects of the present invention are as follows: the present invention solves the demoulding problem of a handle with a negative demoulding slope and a ring-shaped opening structure in the cross section of the handle portion without reducing production efficiency or increasing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 , a three-dimensional schematic diagram of a universal handle with all positive draft angles;

[0017] Figure 2 , a schematic diagram of the structure of a handle with a C-shaped negative demoulding slope at the carrying part of the present invention;

[0018] Figure 3 , a schematic diagram of the structure of a handle with a U-shaped negative demoulding slope at the carrying part of the present invention;

[0019] Figure 4 , a schematic structural diagram of the mold of the circular opening of the handheld part of the present invention in a mold closing state;

[0020] Figure 5 , a schematic structural diagram of the mold opening state of the circular opening of the handheld part of the present invention;

[0021] Figure 6 , a schematic structural diagram of the mold opening state of the circular opening of the handheld part of the present invention;

[0022] Figure 7 , a schematic structural diagram of the mold opening state of the circular opening of the handheld part of the present invention;

[0023] Figure 8 , a schematic structural diagram of the mold opening state of the circular opening of the handheld part of the present invention;

[0024] Fig. 9 , a schematic structural diagram of the mold opening state of the circular opening of the handheld part of the present invention;

[0025] Fig.10 , a schematic structural diagram of the mold ejection state of the annular opening of the handle portion of the present invention;

[0026] Fig.11 , a schematic structural diagram of the mold opening state of the circular opening of the handheld part of the present invention;

[0027] Fig.12 , a schematic diagram of the multi-stage ejection structure of the mold of the circular opening of the handheld part of the present invention;

[0028] Fig.13 , a schematic diagram of the multi-stage ejection structure of the mold of the circular opening of the handheld part of the present invention;

[0029] Fig.14 , a schematic diagram of the multi-stage ejection structure of the mold of the circular opening of the handheld part of the present invention;

[0030] Fig.15 , a schematic structural diagram of the mold of the circular opening of the handheld part of the present invention in a mold closing state;

[0031] Fig.16 , a schematic structural diagram of the mold opening state of the circular opening of the handheld part of the present invention;

[0032] Fig.17 , a schematic structural diagram of the mold ejection state of the annular opening of the handle portion of the present invention;

[0033] Fig.18 , a schematic diagram of the multi-stage ejection structure of the mold of the circular opening of the handheld part of the present invention;

[0034] Fig.19 , a schematic diagram of the multi-stage ejection structure of the mold of the circular opening of the handheld part of the present invention;

[0035] Fig. 20 , a schematic structural diagram of the mold opening state of the circular opening of the handheld part of the present invention;

[0036] Fig.21 , a schematic structural diagram of the mold opening state of the circular opening of the handheld part of the present invention;

[0037] Fig. 22 , a schematic structural diagram of the mold opening state of the circular opening of the handheld part of the present invention;

[0038] Fig.23 , a schematic structural diagram of the mold opening state of the circular opening of the handheld part of the present invention;

[0039] Fig.24 , a schematic structural diagram of the mold ejection state of the annular opening of the handle portion of the present invention;

[0040] Fig.25 , schematic diagram of the demoulding deformation structure of the annular opening of the handheld part of the present invention;

[0041] Fig.26 , schematic diagram of the ejection state structure of a universal positive demoulding slope handle mold;

[0042] Fig. 27 , a schematic diagram of the structure of the mold with the annular opening of the handheld part being demoulded by driving a slider;

[0043] Fig.28 , a schematic diagram of the structure of the mold with the annular opening of the handheld part being demoulded by driving a slider; DETAILED DESCRIPTION

[0044] The specific implementation modes of the invention will be further described in detail below with reference to the accompanying drawings.

[0045] In order to thoroughly understand the embodiments of the present invention, detailed structures and methods will be presented in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other embodiments.

[0046] See Figures 4 to 24, an open type comfortable handle mold structure, the open type comfortable handle is divided into a ring part 1, a handheld part 12 and a connecting belt 11 between the ring part 1 and the handheld part 12, the demoulding direction of the ring part 1 and the connecting belt 11 is consistent, and is also consistent with the mold opening direction of the mold, which belongs to the positive demoulding direction, the cross section of the handheld part 12 is an annular opening 14, the line connecting the center of the ring and the center of the opening is perpendicular or nearly perpendicular to the mold opening direction, which is the negative demoulding direction, and the open type comfortable handle is a one-time integrated molding, and the material is an elastic plastic material. The present invention designs a mold demoulding method for the annular opening 14 of the handheld part 12 of the open type comfortable handle. To realize the demoulding method of the present invention, the mold static cavity plate 3, the mold dynamic cavity plate 2, the lining core body of the annular opening 14 (hereinafter referred to as the core rod 4) and the mold ejector 9 required for molding are required. In the mold closing state, the core rod 4 is clamped by the mold static cavity plate 3 and the mold dynamic cavity plate 2 to form a glue injection space for the annular opening 14. In order to illustrate the demoulding method, the static part of the machine when opening the mold is defined as the static plate group, which includes the static cavity plate 3 of the mold, and the moving part is defined as the dynamic plate group, which includes the dynamic cavity plate 2 of the mold. In the mold closing state, the dynamic plate group and the static plate group are combined together to form a complete mold, and in the mold opening state, the dynamic plate group and the static plate group are separated. In addition, it should be noted that the sleeve part 1 after injection molding and the sleeve core 22 are provided with a certain clamping force by designing a concave-convex groove 15 with a certain drop. This clamping force cannot be greater than the ejection force of the mold but must be greater than the force of the annular opening 14 to separate from the core rod 4. In addition, the open-type comfortable handle can be divided into the front and back sides. Generally speaking, the front side is facing upwards after being inserted into the container, and the back side is facing downwards. The open-type comfortable handle can be made on both the front and back sides relative to the mold direction. If the front side corresponds to the mold static cavity plate 3, the ring core 22 is installed on the mold dynamic cavity plate 2; if the front side corresponds to the mold dynamic cavity plate 2, the ring core 22 of the handle is installed on the mold static cavity plate 3. Similarly, the ejector pin 9 can also be pushed on the front side of the handle or on the back side of the handle. The following methods are all taken as examples of the ejector pin pushing the back side of the handle. For example, the ejector pin pushes the front side of the handle, but the handle is changed in direction relative to the mold, and the rest of the demolding structures are the same.

[0047] Several embodiments of the present invention are described in detail below:

[0048] The first method ( Figure 4-Figure 10 ): The core rod 4 is installed on the mold static plate group through the positioning mechanism 41, so that it can make a straight line from zero to demoulding distance relative to the mold static cavity plate 3 ( Figure 5 ) or curvilinear motion ( Figure 8 ), the mandrel 4 can also rotate by itself through the positioning mechanism 41 ( Figure 7 ), the core rod 4 will be pressed by the mold static cavity plate 3 and the mold dynamic cavity plate 2 in the mold closing state, and the distance between the core rod 4 and the mold static cavity plate 3 is zero ( Figure 4), a glue injection space (a) is formed between the core rod 4 and the mold static cavity plate 3 and the mold dynamic cavity plate 2 to form an annular opening 14 Figure 4 ), after the product injection molding is completed, the mold begins to open, and an auxiliary spring 5 is installed between the core rod 4 and the mold static plate group to push the core rod 4 ( Figure 5 ), or use a driving mechanism to directly drive the mandrel 4 ( Fig. 22 ), or use the ejection mechanism to eject the core rod 4 ( Fig.13 ), the purpose of which is to make the core rod 4 leave the mold static cavity plate 3 faster with the annular opening 14 when the mold is opened until it is limited by the positioning mechanism 41 ( Figure 5-Figure 8 ), at this time, the collar part 1 of the handle is engaged by the collar inner core 22 through the concave-convex groove 15, so that the collar part 1 is fixed on the mold dynamic cavity plate 2, and the annular opening 14 still wraps the core rod 4 ( Figure 5 ), since the movement of the core rod 4 relative to the static cavity plate 3 of the mold has been limited, as the mold opening continues, the core rod 4 will leave the dynamic cavity plate 2 of the mold with the annular opening 14, and at the same time, the annular opening 14 will be pulled by the connecting belt 11 around the core rod 4 or rotate together with the core rod 4 in the mold opening direction ( Figure 6 , Figure 7 ), while the collar portion 1 is clamped by the collar inner core 22 and continues to remain on the mold dynamic cavity plate 2. At this time, the annular opening 14 and the collar portion 1 are separated by a certain distance in the mold opening direction ( Figure 6 ), i.e., the demoulding distance of the annular opening 14, and the connecting belt 11 connecting the ring part 1 and the hand-held part 12 forms an angle ( Figure 6 , Figure 7 , Figure 8 ), this angle will be closer to the mold opening direction as the mold opening distance increases ( Fig. 9 ), at this time, there is enough separation distance between the annular opening 14 and the static cavity plate 3 of the mold ( Figure 6 , Figure 7 , Fig. 9 , Fig. 20 , Fig. 22 H in the figure) without causing demoulding interference, until the mold opening width exceeds the stretching length limit of the connecting belt 11, the annular opening 14 begins to be forcibly pulled out from the core rod 4, and the pulling direction is parallel or nearly parallel to the connecting belt 11 ( Fig. 9 ), this direction is also closer to the direction of mold opening. For the core rod 4 diameter ( Figure 2 H7 in the figure is greater than the opening width of the annular opening 14 ( Figure 2 The handle H6 in the figure, when the mandrel 4 is pulled out, the opening of the annular opening 14 will be stretched open ( Fig. 9 ), the outer diameter of the annular opening 14 will increase ( Fig. 9 ), and at this time, the core rod 4 has a certain distance from the static cavity plate 3 of the mold ( Figure 6, Figure 7 , Fig. 9 , Fig. 20 , Fig. 22 H in the figure), this spacing is sufficient to accommodate the increased diameter of the outer periphery of the annular opening 14, and the annular opening 14 wraps the core rod 4 and rotates a certain angle toward the mold opening direction, so there is no interference when the annular opening 14 is separated from the core rod 4. As the mold opening continues, the annular opening 14 can be completely separated from the core rod 4 ( Fig.10 ), since the handle is made of elastic plastic material, the annular opening 14 will return to its original state after being pulled out. After the mold is opened, the handle grommet 1 is still engaged by the collar inner core 22 on the mold moving cavity plate 2 through the concave-convex groove 15 until the ejector 9 pushes the handle grommet 1 away from the collar inner core 22 to complete a complete demoulding process ( Fig.10 ). If the above structure does not add the spring 5 or mechanical drive between the core rod 4 and the mold static plate group, the core rod 4 will be pulled away from the mold static cavity plate 3 by the pulling action of the connecting belt 11 when the mold is opened until the positioning mechanism 41 stops. However, this method occasionally causes the core rod 4 to be unable to detach from the mold static cavity plate 3 smoothly, resulting in deformation of the annular opening 14 after the product is demolded ( Fig.25 ) problem, it can also be used when the deformation requirement is not high.

[0049] The second method ( Figure 11-Figure 14 ): The core rod 4 is installed on the mold moving plate group through the positioning mechanism 41, so that it can make a straight or curved motion from zero to a certain distance relative to the mold moving cavity plate 2. The core rod 4 can also rotate by itself through the positioning mechanism. When the mold is in the mold closing state, the core rod 4 will be pressed by the mold static cavity plate 3 and the mold moving cavity plate 2. At this time, the distance between the core rod 4 and the mold moving cavity plate 2 is zero, and a ring-shaped opening 14 of injection space is formed between the core rod 4 and the mold static cavity plate 3 and the mold moving cavity plate 2. After the product injection molding is completed, the mold begins to open. A spring 5 can be installed between the core rod 4 and the mold moving plate group to push the core rod 4, or a driving mechanism can be used to drive the core rod 4, or a push rod can be set to push the core rod 4 ( Fig.13 ), the purpose of which is to make the core rod 4 leave the mold moving cavity plate 2 faster with the annular opening 14 while the mold is opened until the core rod 4 is limited by the positioning mechanism 41 and stops ( Fig.11 ), the state at this time is that the annular opening 14 follows the core rod 4 and leaves the mold dynamic cavity plate 2 by a certain distance ( Fig.11 H), while the collar portion 1 is still engaged with the collar inner core 22 on the movable cavity plate 2 through the concave-convex groove 15 ( Fig.11 ), until the mold opening stops and the ejection program is run. The ejection program can be divided into multiple stages. The first stage is that the ejector 9 pushes the connecting belt 11 to change its angle and pulls the annular opening 14 to make the annular opening 14 rotate around the core rod 4 or rotate with the core rod 4 in the mold opening direction ( Fig.12), for the core rod 4 diameter ( Figure 2 H7 in the figure is greater than the opening width of the annular opening 14 ( Figure 2 When the core rod 4 is pulled out, the opening of the annular opening 14 will be stretched open, and the outer diameter of the annular opening 14 will increase. At this time, the core rod 4 has left the mold cavity plate 2 with the annular opening 14 for a certain distance ( Fig.11 H in the figure), and rotated a certain angle toward the mold opening direction, so the distance between the annular opening 14 and the dynamic cavity plate 2 ( Fig.11 The H) in the figure is large enough to accommodate the enlarged diameter of the outer periphery of the annular opening 14. As the push rod 9 continues to push the connecting belt 11, the annular opening 14 can be completely separated from the mandrel 4 ( Fig.13 ), since the handle is made of elastic plastic material, the annular opening 14 will return to its original state after being pulled out. After the core rod 4 is pulled out of the annular opening 14, the ring part 1 is still engaged with the inner core 22 of the ring ( Fig.13 ), then run the second-level ejection program to eject the collar part 1 out of the collar core 22 so that the handle is completely detached ( Fig.14 ), if the connecting band 11 is not pushed out first but all the ejector pins 9 are pushed out together, the possible result is that the collar part 1 is pushed out of the collar core 22 in advance, so that the collar core 22 cannot be engaged with the collar part 1 and loses the restraining effect on the connecting band 11, resulting in the annular opening 14 being directly pushed and rotated around the core rod 4 and cannot be separated. If the above structure is not assisted by the spring 5 between the core rod 4 and the mold movable plate group or mechanically driven, the ejection method with one more level than the above ejection method can also be used for demolding. The method is to set up multi-stage ejection, the first level is the ejector pin 9 ejecting the core rod 4, the core rod 4 drives the annular opening 14 to separate from the mold movable cavity plate 2 until the ejection stops or the core rod 4 is stopped by the limit, and the ejection of the second and third levels is the same as the first and second levels of the ejection method described above and will not be described again. If the above structure does not add the spring 5 between the core rod 4 and the mold moving plate group to assist, and does not set the structure for ejecting the core rod 4, and directly starts the first-level ejection program after the mold is opened, when the ejector 9 pushes the connecting belt 11, the core rod 4 will also be pulled away from the mold moving cavity plate 2 by the pulling effect of the connecting belt 11 until it stops at the limit position. However, this method occasionally causes the core rod 4 to be not smoothly separated from the mold moving cavity plate 2, resulting in the product annular opening 14 being deformed during demolding ( Fig.25 ) problem, it can also be used when the deformation requirement is not high.

[0050] The third method ( Figure 15-19 ): The mandrel 4 is designed to be a full circle, the mandrel 4 can rotate freely, the annular opening 14 can rotate around the mandrel 4 or around the mandrel 4 when the mandrel 4 is stationary, and the cross-sectional wall thickness of the annular opening 14 is designed to be the thinnest at the opening part ( Fig.15 H1 in the figure), getting thicker towards the middle ( Fig.15 H2 in the figure is used to create a certain gap between the annular opening 14 and the static cavity plate 3 or the dynamic cavity plate 2 of the mold after the annular opening 14 is rotated to a certain angle ( Fig.16 H3 in Fig.18 H4 in the figure). In this way, the core rod 4 can be installed in the static plate group and the dynamic plate group of the mold. If the core rod 4 is installed in the static plate group ( Figure 15-17 ), as the mold is opened, since the collar part 1 is engaged with the inner core 22 of the collar part of the moving plate group through the concave-convex groove 15, the collar part 1 will pull the annular opening 14 wrapped with the core rod 4 on the static cavity plate 3 of the mold through the connecting belt 11. Due to the wall thickness design of the annular opening 14, the annular opening 14 can rotate around the core rod 4 or rotate with the core rod 4 under the pulling of the connecting belt 11 ( Fig.16 ), the outer periphery of the annular opening 14 after rotation will form a certain gap with the static cavity plate 3 of the mold ( Fig.16 H3 in the figure), and the pulling direction of the connecting belt 11 on the annular opening 14 is also closer to the mold opening direction. As the mold opening distance increases, the annular opening 14 will be directly pulled out of the core rod 4 by the connecting belt 11. When the core rod 4 is pulled out, the gap between the annular opening 14 and the static cavity plate 3 of the mold ( Fig.16 H3 in the figure can accommodate part of the deformation of the outer periphery until the ejector pin 9 pushes the collar part 1 away from the collar inner core 22 after the mold opening is completed, so that the handle is separated as a whole ( Fig.17 ) to complete a complete demoulding process. If the core rod is installed in the moving plate assembly ( Figure 18-Figure 19 ) then it is necessary to run a multi-stage ejection program. After the mold is opened, run a first-stage ejection program. The ejector pin 9 directly pushes the connecting belt 11. Due to the wall thickness design of the annular opening 14, the connecting belt 11 is ejected by the ejector pin 9 and pulls the annular opening 14 to rotate around the core rod 4. It can also rotate with the core rod 4 ( Fig.18 ), the outer periphery of the rotating annular opening 14 will form a certain gap with the dynamic cavity plate ( Fig.18 H4 in the figure), and the pulling direction of the connecting belt 11 on the annular opening 14 is also closer to the ejection direction. As the ejection distance of the connecting belt 11 increases, the annular opening 14 is pulled by the connecting belt 11 and directly pulled out from the core rod 4. When the core rod 4 is pulled out, the gap between the annular opening 14 and the static cavity plate 3 of the mold ( Fig.18 H4 in the figure can accommodate part of the outer deformation, and then the secondary ejection process is run, and the ejector 9 pushes the collar part 1 away from the collar core 22 to separate the handle as a whole ( Fig.19 The mold structure of the above demoulding method is simpler, but the thickness distribution and peripheral shape of the annular opening 14 are limited. If the thickness of the opening of the annular opening 14 is ( Fig.15 H1) and the thickness of the middle part ( Fig.15When the drop is not too large, the gap between the annular opening 14 and the static cavity plate 3 or the dynamic cavity plate 2 of the mold ( Fig.16 H3 in Fig.18 H4) in the figure is not enough to accommodate the diameter expansion of the annular opening 14 when it is separated from the core rod 4, so the annular opening 14 can only be pulled out of the gap between the core rod 4 and the mold static cavity plate 3 or the mold dynamic cavity plate 2 after changing the pull-out angle. This demolding method is easy to deform the annular opening 14, and can be used for those with low deformation requirements.

[0051] The fourth method ( Figure 20-24 ): The core rod 4 is installed on the mold moving plate group through the positioning mechanism 41 ( Fig. 20 , Fig. 22 ), so that it can make a straight line with zero to a certain spacing relative to the mold dynamic cavity plate 2 ( Fig. 22 ) or curve ( Fig. 20 ) movement, the core rod 4 can also rotate by itself through the positioning mechanism 41. When the mold is in the mold closing state, the core rod 4 will be pressed by the mold static cavity plate 3 and the mold dynamic cavity plate 2. At this time, the distance 2 between the core rod 4 and the mold dynamic cavity plate 2 is zero, and a ring-shaped opening 14 of the injection space is formed between the core rod 4 and the mold static cavity plate 3 and the mold dynamic cavity plate 2. After the handle injection molding is completed, the mold begins to open. The core rod 4 and the mold dynamic plate group can be used to push the core rod 4 ( Fig. 20 ), or use the driving mechanism 42 to drive the mandrel 4 ( Fig. 22 ), the purpose of which is to make the core rod 4 leave the mold dynamic cavity plate 2 faster with the annular opening 14 when the mold is opened and form a predetermined spacing ( Fig. 20 , Fig. 22 H in the figure), this distance makes it possible for the core rod 4 to move out of the annular opening 14 without interfering with the mold cavity plate, and also provides space for the outer diameter of the annular opening 14 to increase when the core rod 4 actively leaves the annular opening 14. At this time, the collar part 1 is still clamped on the collar inner core 22 through the concave-convex groove 15 ( Fig. 20 , Fig. 22 ), as the mold continues to be opened, the core rod is continuously driven by the positioning mechanism 41 ( Fig.21 ), or under the drive of the driving mechanism 42 ( Fig.23 ) is separated from the annular opening 14 until the mold opening is completed and the ejector pin 9 pushes the collar part 1 to separate from the collar inner core 22 to complete a complete demoulding method ( Fig.24 ). The above structure can also be used to install the core rod 4 on the mold static plate group through the positioning mechanism 41, and the subsequent demoulding method is just the opposite direction, which will not be described here. This demoulding method has a somewhat complex structure, but the handle product that is ejected is least deformed.

[0052] The core point of the above demolding methods is to use various methods to make the core rod 4 after mold opening drive the annular opening 14 to form a certain distance H between the static cavity plate 3 of the mold or the dynamic cavity plate 2 of the mold. This distance H can accommodate the peripheral expansion of the annular opening 14 when it is separated from the core rod 4, and also prevent the core rod 4 from interfering with the mold cavity plate when it is separated from the annular opening 14. In addition, various methods are used to change the direction of the annular opening 14 when it is separated from the core rod 4 so that it is closer to the mold opening direction or the positive direction of demolding. If the separation direction is not changed, the direction of the annular opening 14 separating from the core rod 4 will interfere with the cavity plate. In addition, the inner core body 22 of the ring is clamped with the lifting ring part 1 through the concave-convex groove 15. The purpose is to enable the ring part that is clamped by the inner core of the ring to be pulled by the connecting belt when the annular opening is separated from the core rod. If the first, second and third demolding methods mentioned above are set so that the core rod 4 cannot rotate freely, assuming that the core rod 4 is a pure circle, the annular opening 14 will rotate around the core rod 4. If the core rod 4 is not a pure circle, the annular opening 14 will be forced to rotate around the core rod 4 and cause a small deformation. It can also be used when the deformation degree requirement is not high.

[0053] The mold of the first demoulding method mentioned above has almost no change in volume, production speed and production cost compared to the handle mold with all positive demoulding slopes, so the inventor believes that this method is the most reasonable method and has the conditions for large-scale promotion of products. The mold of the second demoulding method has basically no change in production speed compared to the handle mold with all positive demoulding slopes, but the mold height is increased due to the lengthening of the ejector rod due to multi-stage ejection, and the complexity of the mold is increased. The mold of the third demoulding method has no change in volume, production speed and production cost compared to the handle mold with all positive demoulding slopes, but the annular opening 14 is easy to deform, so it can be used for those with low deformation requirements. The mold of the fourth demoulding method has an increase in volume and a relatively complex mold compared to the handle mold with all positive demoulding slopes, but the ejected handle product has the least deformation.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field can still modify or replace the specific implementation methods of the present invention with equivalents. Any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention are within the scope of protection of the pending claims.

Claims

1. An open-type comfortable handle mold structure, comprising a mold static cavity plate and a mold dynamic cavity plate, wherein the open-type comfortable handle has an annular opening, Features: The static mold cavity plate and the dynamic mold cavity plate of the mold are provided with a core rod adapted to the mold cavity. The core rod can make a linear or curved relative movement within a demolding distance from zero to the static mold cavity plate or the dynamic mold cavity plate of the mold. The purpose is to make the core rod drive the annular opening to separate from the static mold cavity plate or the dynamic mold cavity plate of the mold after the mold is opened and form a predetermined distance H. This distance H can prevent the annular opening from interfering with the static mold cavity plate or the dynamic mold cavity plate of the mold when it is separated from the core rod. This distance H can prevent the core rod from interfering with the static mold cavity plate or the dynamic mold cavity plate of the mold when it is separated from the annular opening. This distance H can also accommodate the expansion space generated by the annular opening when it is separated from the core rod. This distance H can also make the annular opening rotate around the core rod or together with the core rod in the mold opening direction without interfering with the static mold cavity plate or the dynamic mold cavity plate of the mold. After injection molding, the collar part and the inner core of the collar are provided with a certain clamping force by designing a concave-convex groove with a certain drop. This clamping force cannot be greater than the ejection force of the mold but must be greater than the force of the annular opening to separate from the core rod. The core rod is installed on the static plate group of the mold through a positioning mechanism, so that it can make a straight line or curve movement from zero to the demoulding distance relative to the static cavity plate of the mold. The core rod can also rotate by itself through the positioning mechanism. When the mold is in the mold closing state, the core rod will be pressed by the static cavity plate of the mold and the dynamic cavity plate of the mold. At this time, the distance between the core rod and the static cavity plate of the mold is zero, and a ring-shaped opening injection space is formed between the core rod and the static cavity plate of the mold and the dynamic cavity plate of the mold. After the injection molding of the product is completed, the mold begins to open. An auxiliary spring is installed between the core rod and the static plate group of the mold to push the core rod, or a driving mechanism is used to directly drive the core rod The purpose is to make the core rod leave the static cavity plate of the mold with the annular opening faster while the mold is opened until it is limited by the positioning mechanism. At this time, the ring part of the handle is clamped by the inner core of the ring through the concave and convex grooves to fix the ring part on the dynamic cavity plate of the mold, while the annular opening still wraps the core rod. Since the movement of the core rod relative to the static cavity plate of the mold has been limited, as the mold opening continues, the core rod will leave the dynamic cavity plate of the mold with the annular opening. When the mold opening continues, the core rod will be separated from the annular opening, and the ring part will be clamped by the inner core of the ring and continue to stay on the dynamic cavity plate of the mold.

2. The open-type comfortable handle mold structure according to claim 1, Features: The core rod can rotate freely together with the annular opening. After the mold is opened, the direction in which the core rod rotates together with the annular opening tends to the mold opening direction or the positive direction of demolding. The purpose is to ensure that the direction in which the annular opening leaves the core rod does not interfere with the static cavity plate or the dynamic cavity plate of the mold.

3. The open-type comfortable handle mold structure according to claim 1, Features: The core rod is designed to be a full circle, and the annular opening can rotate around the core rod or rotate with the core rod. The wall thickness of the annular opening is designed to be thinnest at the opening and becomes thicker towards the middle, so that a predetermined gap is generated between the annular opening and the static cavity plate or the dynamic cavity plate of the mold after the annular opening rotates around the core rod or rotates with the core rod by a predetermined angle. In addition, the direction in which the annular opening is separated from the core rod tends to the mold opening direction without interfering with the static cavity plate or the dynamic cavity plate of the mold.

4. The open-type comfortable handle mold structure according to claim 1, Features: The core rod is provided with a spring to assist the core rod in driving the annular opening to quickly leave the static cavity plate or the dynamic cavity plate of the mold and form a distance H when the mold is opened.

5. The open-type comfortable handle mold structure according to claim 1, Features: The core rod uses a driving mechanism to directly drive the core rod when opening the mold, driving the annular opening to quickly leave the static cavity plate of the mold or the dynamic cavity plate of the mold and form a distance H.

6. The open-type comfortable handle mold structure according to claim 1, Features: The core rod is provided with a push rod to push the core rod to drive the annular opening away from the static cavity plate of the mold or the dynamic cavity plate of the mold and form a distance H.

7. The open-type comfortable handle mold structure according to claim 1, Features: After the core rod drives the annular opening to separate from the static cavity plate of the mold or the dynamic cavity plate of the mold and form a distance H, a driving mechanism can be used to drive the core rod to move in a straight line or curve in a set direction.

8. The open-type comfortable handle mold structure according to claim 1, Features: The core rod and the ejector rod are installed in the same group, and the ejector rod is provided with a multi-stage ejection mode and a graded ejection handle.

9. The open-type comfortable handle mold structure according to claim 1, Features: The collar part and the collar inner core are designed with a concave-convex groove with a drop so that they have a clamping force with each other, the purpose of which is to enable the collar part clamped by the collar inner core to be pulled by the connecting belt when the annular opening is separated from the core rod, and this clamping force is smaller than the ejection force of the mold.

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