Straight body inclined ejector device and undercut mold

Abstract

The invention discloses a straight body inclined ejector device, comprising: a straight body inclined ejector, having a straight body section and an inclined ejector section connected in an integral manner, the straight body section axially parallel to the mold opening direction of the mold, and an end of the inclined ejector section away from the straight body section forming an undercut core; an inclined ejector guide, arranged on the rear mold and movably connected to the inclined ejector section, the inclined ejector section can be linearly slid along a first direction to eject out of the inclined ejector guide, and the undercut core is located on a side of the inclined ejector guide away from the straight body section; an inclined ejector slider, arranged on an ejector pin plate and connected to the straight body section, the inclined ejector slider can linearly slide along a second direction on the ejector pin plate to drive the undercut core to be ejected from the undercut glue position, and the mold opening direction, the first direction and the second direction are not parallel to each other. The straight body inclined ejector device and the undercut mold can avoid the possibility of cross interference between the inclined ejector rods, and realize undercut demolding when the number of undercut glue positions is large or the inclined ejector space is significantly insufficient.

Description

Technical Field

[0001] The invention belongs to the technical field of molds, and in particular relates to a straight body inclined top device and an undercut mold. Background Art

[0002] Molds are various molds and tools used in industrial production to obtain the desired products by injection molding, blow molding, extrusion, die casting or forging, smelting, stamping and other methods. In short, molds are tools used to make molded objects. This tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the shape of the object by changing the physical state of the molded material, and is known as the "mother of industry".

[0003] With the development of social economy, the application of injection molding products is becoming more and more extensive, and their structure is becoming more and more complex. Some injection molding products have undercuts, which interfere with the demoulding direction, resulting in the inability to automatically demould after the injection molding is completed. At present, the industry mostly uses a tilting mechanism to realize the demoulding of the undercut glue position.

[0004] The inclined ejector mechanism is easy to use, but when there are a large number of undercut glue positions or the space for the inclined ejector is significantly insufficient, cross interference is likely to occur between the inclined ejector rods of the inclined ejector mechanism, making it impossible to achieve the purpose of undercut demoulding, and its application is obviously limited. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a straight inclined ejector device and an undercut mold, which can avoid the possibility of cross-interference between the inclined ejector rods and realize undercut demoulding when the number of undercut glue positions is large or the inclined ejector space is significantly insufficient.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A straight body inclined lift device, comprising a straight body inclined lift piece, an inclined lift guide piece and an inclined lift slide block:

[0008] The straight body inclined top piece comprises a straight body section and an inclined top section which are integrally connected, the straight body section is axially parallel to the mold opening direction of the mold, and an end of the inclined top section away from the straight body section forms an inverted core;

[0009] The inclined top guide is arranged on the rear mold and is movably connected with the inclined top section. The inclined top section can be linearly slidably pushed out of the inclined top guide along a first direction. The undercut core is located on a side of the inclined top guide away from the straight section.

[0010] The inclined ejector slider is arranged on the ejector plate and connected to the straight section. The inclined ejector slider can slide linearly on the ejector plate along the second direction to drive the undercut core to escape from the undercut glue position. The mold opening direction, the first direction and the second direction are not parallel to each other.

[0011] As an improvement of the above technical solution, the inclined top section has a first guide portion, and the inclined top guide member has a second guide portion, and the first guide portion and the second guide portion form a linear reciprocating motion cooperation along the first direction.

[0012] As a further improvement of the above technical solution, the inclined top section has a first inclined surface, and the first inclined surface is parallel to the first direction and is closely connected to the inclined top guide member.

[0013] As a further improvement of the above technical solution, the first direction and the second direction are perpendicular to each other;

[0014] And / or, there is an acute angle between the first direction and the mold opening direction.

[0015] As a further improvement of the above technical solution, the straight body inclined top device also includes an inclined guide column, which is arranged on the rear mold and is axially parallel to the first direction; the inclined top slider is sleeved on the inclined guide column, and there is a relative linear reciprocating sliding between the two along the axial direction of the inclined guide column.

[0016] As a further improvement of the above technical solution, the inclined ejector slide block has a third guide portion, the ejector plate has a fourth guide portion, and the third guide portion and the fourth guide portion form a linear reciprocating motion cooperation along the second direction.

[0017] As a further improvement of the above technical solution, the inclined top guide member has a vertical column structure, and the vertical column structure extends along the mold opening direction.

[0018] As a further improvement of the above technical solution, the rear mold includes a rear mold plate and a rear mold frame, the inclined ejector guide is arranged on the rear mold plate, the ejector plate is located between the rear mold plate and the rear mold frame, and the straight inclined ejector member and the rear mold plate are spaced apart along the second direction.

[0019] As a further improvement of the above technical solution, one end of the straight body section away from the inclined top sliding block overlaps with the rear template.

[0020] An undercut mold comprises a front mold, a rear mold, an ejector plate and any of the above-mentioned straight body inclined ejector devices.

[0021] The beneficial effects of the present invention are:

[0022] When the ejector plate is ejected on the rear mold, the inclined ejector slider moves along the mold opening direction with the ejector plate, and synchronously slides linearly along the second direction, so that the straight inclined ejector member connected to the inclined ejector slider has the movement in the above two directions, and is converted into linear sliding in the first direction under the guidance of the inclined ejector guide member. The inclined ejector section is ejected linearly along the first direction to make the undercut core escape from the undercut glue position and the product escape from the rear mold. The straight section has a straight structure along the mold opening direction, thereby avoiding the possibility of cross interference with other inclined ejector rods. When the number of undercut glue positions is large or the space for the inclined ejector is significantly insufficient, the undercut demolding can still be successfully achieved, which has a significant adaptability advantage.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 is a cross-sectional schematic diagram of a straight body inclined top device provided in Example 1 of the present invention;

[0026] Figure 2 yes Figure 1 An enlarged schematic diagram of the M position of the central straight body inclined top device;

[0027] Figure 3 yes Figure 1 An enlarged schematic diagram of the N position of the central straight body inclined top device;

[0028] Figure 4 It is a top partial axonometric schematic diagram of a straight body inclined top device provided in Example 1 of the present invention;

[0029] Figure 5 It is a partial axonometric diagram of a straight body inclined top device provided in Example 1 of the present invention, viewed from above;

[0030] Figure 6 is a schematic front view of the undercut mold provided in Example 1 of the present invention;

[0031] Figure 7 It is a top partial axonometric schematic diagram of the undercut mold provided in Example 1 of the present invention.

[0032] Description of main component symbols:

[0033] 1000-inverted mold, 0100-straight body inclined ejector device, 0110-straight body inclined ejector member, 0111-straight body section, 0112-inverted ejector section, 0112a-inverted core, 0112b-first guide portion, 0112c-first inclined surface, 0120-inverted ejector guide member, 0121-second guide portion, 0130-inverted ejector slider, 0131-third guide portion, 0140-inverted guide column, 0200-rear mold, 0210-rear mold frame, 0220-rear mold plate, 0221-through matching hole, 0300-ejector plate, 0310-ejector panel, 0320-ejector bottom plate, 0330-fourth guide portion, 0400-inverted ejector mechanism, 0410-inverted ejector rod, 0420-button core, S(a)-injection molded product. DETAILED DESCRIPTION

[0034] In order to facilitate the understanding of the present invention, a more comprehensive description of the straight body inclined top device and the undercut mold will be given below with reference to the relevant drawings. The preferred embodiments of the straight body inclined top device and the undercut mold are shown in the drawings. However, the straight body inclined top device and the undercut mold can be implemented in many different forms and are not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the straight body inclined top device and the undercut mold more thorough and comprehensive.

[0035] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used in the specification of the straight body inclined ejector device and the undercut mold herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0037] Example 1

[0038] Please refer to Figures 1 to 3 The present embodiment discloses a straight body inclined ejector device 0100, which includes a straight body inclined ejector member 0110, an inclined ejector guide member 0120 and an inclined ejector slider 0130, which can avoid the possibility of cross-interference between the inclined ejector rods and realize undercut demoulding when there are a large number of undercut glue positions or the space for the inclined ejector is significantly insufficient.

[0039] First of all, it is explained that the mold is generally composed of a front mold and a rear mold 0200, which are spliced ​​to form a cavity. When the mold is opened along the parting line, one part of the mold remains fixed and acts as the front mold, and the other part moves away from the front mold and becomes the rear mold 0200.

[0040] The front mold usually includes a front mold frame, a front mold plate and a front mold core. The front mold frame is installed at the stationary end of the injection molding machine, the front mold plate is installed on the front mold frame, and the front mold core is installed on the front mold plate. The rear mold 0200 usually includes a rear mold frame 0210, a rear mold plate 0220 and a rear mold core. The rear mold frame 0210 is installed at the moving end of the injection molding machine, the rear mold plate 0220 is installed on the rear mold frame 0210, and the rear mold core is installed on the rear mold plate 0220. The front mold core and the rear mold core are relatively molded to form the required cavity, and the plastic melt is injected into the cavity to produce the injection molded product S(a). Before opening the mold, the injection molded product S(a) keeps in contact with the front mold core and the rear mold core respectively.

[0041] The ejector plate 0300 is the bearing base of the ejection mechanism, used to install the ejector pin, and has a linear motion relative to the front mold / rear mold 0200 along the mold opening direction to realize the ejection and demolding of the injection molded product S (a). Exemplarily, the ejector plate 0300 is arranged between the rear mold frame 0210 and the rear mold plate 0220, and has a linear motion relative to the rear mold 0200.

[0042] The specific structure of the ejector plate 0300 can be selected according to actual needs. Exemplarily, the ejector plate 0300 includes an ejector base plate 0320 and an ejector panel 0310 which are stacked. The ejector base plate 0320 is located on a side of the ejector panel 0310 away from the rear template 0220.

[0043] The straight body inclined top piece 0110 has a straight body section 0111 and an inclined top section 0112, which are connected as a whole to form an integral structure. The straight body section 0111 is axially parallel to the mold opening direction of the mold, and extends along the mold opening direction to form a straight body structure. The end of the inclined top section 0112 away from the straight body section 0111 forms an undercut core 0112a, which is used to form the undercut surface required for the injection molded product S(a), thereby realizing the undercut molding. Among them, the undercut core 0112a is formed on the side of the inclined top section 0112, and its extension direction is not parallel to the mold opening direction. When the mold is closed, the undercut core 0112a, the front mold core and the rear mold core surround to form a cavity.

[0044] In the above structure, the main ejection stroke of the straight body inclined ejector 0110 is performed by the straight body section 0111. In the main ejection stroke, the straight body section 0111, based on its straight body structure extending along the mold opening direction, will not cross-interfere with other straight body inclined ejectors 0110 or ordinary inclined ejectors, and can still smoothly realize undercut demoulding when there are many undercut glue positions or the space for the inclined ejector is significantly insufficient.

[0045] The inclined top guide 0120 is disposed on the rear mold 0200 and is movably connected to the inclined top section 0112. The inclined top section 0112 can be pushed out of the inclined top guide 0120 by sliding linearly along the first direction, so that the undercut core 0112a is away from the inclined top guide 0120 and escapes from the undercut glue position. Among them, the undercut core 0112a is located on the side of the inclined top guide 0120 away from the straight body section 0111. It can be understood that when the inclined top section 0112 slides linearly in the opposite direction of the first direction, the undercut core 0112a approaches the inclined top guide 0120 and surrounds the front mold core and the rear mold core to form a mold cavity.

[0046] At the same time, the first direction is not parallel to the mold opening direction, ensuring that the undercut core 0112a can move laterally to achieve undercut demolding. Exemplarily, there is an acute angle between the first direction and the mold opening direction, so that the inclined top section 0112 and the undercut core 0112a thereon have a vertical movement component along the mold opening direction, ensuring the realization of lateral core pulling demolding. Exemplarily, the number of inclined top guides 0120 can be plural, and they are arranged around the circumference of the inclined top section 0112; or, the inclined top guides 0120 have a sleeve structure, which is sleeved on the outer circumference of the inclined top section 0112.

[0047] Please refer to Figures 1 to 4 , exemplary, the inclined top section 0112 has a first guide portion 0112b, and the inclined top guide member 0120 has a second guide portion 0121. The first guide portion 0112b is relatively slidably connected with the second guide portion 0121 to form a linear reciprocating motion match along the first direction.

[0048] The first guide portion 0112b and the second guide portion 0121 are matched and arranged, for example, one is a slider and the other is a slide rail, one is a guide sleeve and the other is a guide rod, etc. Exemplarily, the first guide portion 0112b is a guide groove tooth formed on the surface of the inclined top section 0112 along the first direction, and the second guide portion 0121 is a guide groove tooth opened on the surface of the inclined top guide member 0120 along the first direction, and the two engage with each other for guidance.

[0049] Exemplarily, the inclined top section 0112 has a first inclined surface 0112c. The first inclined surface 0112c is parallel to the first direction and is closely connected with the inclined top guide member 0120 to form a surface fit.

[0050] The inclined ejector slider 0130 is disposed on the ejector plate 0300 and connected to the straight body section 0111, and moves along the mold opening direction with the ejector plate 0300. At the same time, the inclined ejector slider 0130 can slide linearly along the second direction on the ejector plate 0300 to drive the straight body inclined ejector 0110 to move along with it and have a linear sliding component along the second direction, so that the undercut core 0112a is released from the undercut glue position. It can be understood that the ejector plate 0300 has both a driving effect along the mold opening direction and a guiding effect along the second direction on the inclined ejector slider 0130.

[0051] The mold opening direction, the first direction and the second direction are not parallel to each other and are located in the same plane, ensuring that the combined motion of the straight body inclined ejector 0110 occurs along the first direction and has components along the mold opening direction and along the second direction. Exemplarily, the first direction and the second direction are perpendicular to each other.

[0052] The movement of the inclined ejection slider 0130 along the second direction can be synchronously driven by the ejector plate 0300, or can be driven by an independently arranged driving source. Exemplarily, the straight body inclined ejection device 0100 further includes an inclined guide column 0140. The inclined guide column 0140 is arranged on the rear mold 0200 and is axially parallel to the first direction, and is used to synchronously drive the inclined ejection slider 0130 to move along the second direction during the movement of the ejector plate 0300.

[0053] The inclined top slider 0130 is sleeved on the inclined guide column 0140, so that the two can slide back and forth in a relative straight line along the axial direction of the inclined guide column 0140. In other words, the inclined top slider 0130 has a sleeve through hole extending along the first direction, and the inclined guide column 0140 runs through it. In the follow-up process of the inclined top slider 0130 moving synchronously with the ejector plate 0300, due to the acute angle between the first direction and the mold opening direction, the inclined guide column 0140 generates a vertical force along the first direction on the inclined top slider 0130, so that the inclined top slider 0130 has a lateral sliding tendency. Limited by the guiding effect of the ejector plate 0300, the inclined top slider 0130 slides along the second direction relative to the ejector plate 0300, and drives the straight inclined ejector 0110 to slide laterally together, so as to achieve the purpose of lateral demoulding.

[0054] See also Figure 5 Demonstratively, the inclined ejector slider 0130 has a third guide portion 0131, and the ejector plate 0300 has a fourth guide portion 0330. The third guide portion 0131 is relatively slidably connected to the fourth guide portion 0330 to form a linear reciprocating motion cooperation along the second direction, so that the inclined ejector slider 0130 can be slidably maintained on the ejector plate 0300 along the second direction.

[0055] The third guide portion 0131 and the fourth guide portion 0330 are matched and arranged, for example, one is a slider and the other is a slide rail, one is a guide sleeve and the other is a guide rod, etc. Exemplarily, the third guide portion 0131 is a guide flange arranged on the inclined ejector slider 0130, and the fourth guide portion 0330 is a guide slot arranged on the ejector plate 0300. The guide flange and the guide slot extend along the second direction respectively, and the former is embedded in the latter.

[0056] Exemplarily, the inclined top guide 0120 has a vertical column structure, which extends along the mold opening direction so that it has a straight body structure, so as to further increase the length of the straight body part, compress the length of the inclined part, and further reduce the risk of interference caused by cross-misalignment.

[0057] Exemplarily, the inclined top guide 0120 is disposed on the rear template 0220 (specifically, the side of the rear template 0220 away from the rear mold frame 0210). The straight inclined top member 0110 and the rear template 0220 are spaced apart along the second direction so that there is a matching gap between the two along the second direction, and relative movement along the second direction can occur.

[0058] Exemplarily, one end of the straight section 0111 away from the inclined ejector slider 0130 overlaps with the rear template 0220. In other words, at least the end of the straight section 0111 intersects with the projection of the rear template 0220, that is, the span of the straight section 0111 is not less than the distance between the ejector plate 0300 and the rear template 0220. Under this relationship, within the sliding travel range of the ejector plate 0300, the straight inclined ejector 0110 always remains upright between the ejector plate 0300 and the rear template 0220, eliminating the risk of cross interference.

[0059] The straight inclined ejector 0110 may be located at the side of the rear template 0220, or may penetrate the rear template 0220. Exemplarily, the rear template 0220 has a through-fitting hole 0221, and the straight inclined ejector 0110 penetrates the through-fitting hole 0221. The inclined ejector guide 0120 is located at the end of the through-fitting hole 0221 away from the inclined ejector slider 0130, and the inclined ejector section 0112 is at least partially located in the through-fitting hole 0221, so that the inclined ejector section 0112 has an inclined ejector stroke covered by the through-fitting hole 0221 and protected by the inclined ejector guide 0120, and its inclined ejector position is protected by the latter two, thereby eliminating the risk of cross interference on the side of the rear template 0220 away from the rear mold frame 0210.

[0060] Please refer to Figures 1 to 7 This embodiment also discloses an undercut mold 1000, which includes a front mold, a rear mold 0200, an ejector plate 0300 and the aforementioned straight body inclined ejector device 0100. The specific structures of the front mold, the rear mold 0200 and the ejector plate 0300 are shown in the aforementioned content and will not be repeated here.

[0061] It is understood that the undercut mold 1000 is used to form an injection molded product S (a) with multiple undercuts. It is understood that the undercut mold 1000 may also include a common inclined ejector mechanism 0400, which has an inclined ejector rod 0410 arranged obliquely, and the top of the inclined ejector rod 0410 has a buckling core 0420, which is no different from the existing common inclined ejector.

[0062] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments may have different values.

[0063] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0064] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A straight body inclined top device, characterized in that: include: A straight body inclined top piece, comprising a straight body section and an inclined top section connected in one piece, wherein the axial direction of the straight body section is parallel to the mold opening direction of the mold, and an end of the inclined top section away from the straight body section forms an inverted core; An inclined top guide is arranged on the rear mold and is movably connected to the inclined top section. The inclined top section can be linearly slidably pushed out of the inclined top guide along a first direction. The undercut core is located on a side of the inclined top guide away from the straight section. An inclined ejector slider is arranged on the ejector plate and connected to the straight body section, the inclined ejector slider can slide linearly on the ejector plate along a second direction to drive the undercut core to escape from the undercut glue position, and the mold opening direction, the first direction and the second direction are not parallel to each other; The rear mold includes a rear template, and one end of the straight section away from the inclined ejector slider overlaps with the rear template, so that within the sliding stroke range of the ejector plate, the straight inclined ejector always remains upright between the ejector plate and the rear template, and the straight inclined ejector is located on the side of the rear template or passes through the rear template; The first direction and the second direction are perpendicular to each other; and / or, there is an acute angle between the first direction and the mold opening direction; The inclined top section has a first guide portion, and the inclined top guide member has a second guide portion, and the first guide portion and the second guide portion form a linear reciprocating motion cooperation along the first direction.

2. The straight body inclined roof device according to claim 1, characterized in that: The inclined top section has a first inclined surface, which is parallel to the first direction and is closely connected to the inclined top guide member.

3. The straight body inclined roof device according to claim 1, characterized in that: It also includes an inclined guide column, which is arranged on the rear mold and is axially parallel to the first direction; the inclined top sliding block is sleeved on the inclined guide column, and there is a relative linear reciprocating sliding along the axial direction of the inclined guide column.

4. The straight inclined roof device according to claim 1, characterized in that: The inclined ejector slide block has a first guide portion, and the ejector pin plate has a second guide portion, and the first guide portion and the second guide portion form a linear reciprocating motion match along the second direction.

5. The straight inclined roof device according to claim 1, characterized in that: The inclined top guide has a vertical column structure, and the vertical column structure extends along the mold opening direction.

6. The straight inclined roof device according to claim 1, characterized in that: The rear mold includes a rear mold frame, the inclined ejector guide is arranged on the rear mold plate, the ejector plate is located between the rear mold plate and the rear mold frame, and the straight inclined ejector is spaced apart from the rear mold plate along the second direction.

7. An undercut mold, characterized in that: It comprises a front mold, a rear mold, an ejector plate and the straight body inclined ejector device according to any one of claims 1 to 6.

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