Main rail with internal rail

Abstract

A mold box (1) for an injection molding machine (200), the mold box (1) comprising: a first mold plate (20); a second mold plate (30) movably arranged relative to the first mold plate (20) along a longitudinal axis (A); and a main guide rail system (40') configured to guide the second mold plate at least linearly away from and towards the first mold plate (20), wherein the main guide rail system (40') comprises a main guide rail post (40) having a cross section perpendicular to the longitudinal axis (A), wherein the cross section is rectangular, wherein the main guide rail post (40) extends through a third opening (140) through a support (50) arranged between the main guide rail post (40) and the second mold plate (30); wherein the guide rail (70) is formed as an elongated recess in a side wall of the main guide rail post (40) and comprises a first inner guide surface (71); and wherein a protruding support element (60) extends from the third opening (140) in the support (50) into the guide rail (70) and forms a support contact against the first inner guide surface (71) of the guide rail (70).

Description

Technical Field

[0001] This invention relates to a main guide rail for a mold box of an injection molding machine used in the injection molding process. Background Technology

[0002] In the field of injection molding machines with injection units and clamping units for operating the mold box, the mold box typically comprises two mold plates (also known as half-plates) movably arranged relative to each other and guided by a set of guide rails, hereinafter referred to as main guide rails, main guide posts, main guide rail system, or main guide post system, to distinguish them from any other guiding mechanism of the injection molding system. The clamping unit also includes a linear drive mechanism for pressing at least one of the mold plates against one or more other mold plates during the injection of molten plastic by the injection unit. The main guide rails are configured to support the mold plates while the linear drive mechanism presses them together and as the mold plates move toward or away from each other.

[0003] Typically, one mold plate is fixed relative to the frame of the injection molding machine. In a typical injection molding machine, one or more mold plates can slide along a set of main guide rails, also known as main guide rail posts. The movable mold plate can typically slide and translate along four cylindrical guide rails arranged in parallel and intersecting the four corners of a square or rectangular mold plate. An actuator / linear drive mechanism drives the movable mold plate to slide along this set of main guide rails between a position where the mold plate is closed to form the mold and a position where the mold plate is separated from each other, thereby allowing the molded part to be removed from the mold box.

[0004] Using a set of four cylindrical guide rails provides a very stable structure. However, its disadvantages are that manufacturing this mold box structure is very complex and expensive due to the high precision and strict tolerance requirements required for the mold plate to slide on these parallel guide rails. Furthermore, during use, the mold box is subjected to uneven temperature distribution, leading to uneven wear of the mold box components. Another problem is that the guide rails make the design of auxiliary functions such as ejector pins and extraction arms difficult.

[0005] In the mold box of the clamping unit of some injection molding machines, in order to ensure proper alignment of the mold plates, in addition to the main guide post, it is known to provide an additional alignment or positioning system as the mold plates move together. Such a system may, for example, include tapered protrusions extending from one mold plate and complementary tapered recesses formed in the opposing mold plates. As the mold plates move toward each other, the interacting tapered surfaces align the mold plates. It is also known in the art that such alignment systems include mating parts of other shapes. German Utility Model Patent DE 2020 18 107 023 U1 discloses an example in which the alignment system has a beam with a rectangular cross-section. Summary of the Invention

[0006] Therefore, one object of the present invention is to overcome the shortcomings of existing technical systems and increase the diversity of choices.

[0007] In a first aspect, the object of the present invention is achieved by a mold box for an injection molding machine, the mold box comprising: - First template; -A second template that is movably arranged relative to the first template along the longitudinal axis; and - A master track system configured to guide at least the second template to move linearly away from and toward the first template. The aforementioned main rail system includes a main rail post having a cross-section perpendicular to the longitudinal axis. The cross-section is rectangular. The main guide post extends through a third opening, which passes through a support member arranged between the main guide post and the second template. The guide rail is formed as an elongated notch in the sidewall of the main guide post and includes a first internal guiding surface; and The protruding support element extends from the third opening formed through the support member into the guide rail and forms a support contact against the first inner guide surface of the guide rail.

[0008] In one embodiment, the rectangular shape of the main guide post is oriented such that the long side of the rectangle extends vertically, while the short side extends horizontally.

[0009] In another embodiment, the guide rail is formed in the sidewall of the main guide rail post, which is the longer side of the rectangular cross-section of the main guide rail.

[0010] In any of the previously disclosed embodiments, the protruding support element may also have a length greater than the thickness of the second template.

[0011] This allows for increased stiffness in the connection between the main guide post and the second template along the longitudinal axis of the main guide post, thereby resisting torsion / rotation about an axis perpendicular to the longitudinal axis. This significantly reduces the risk of locking between the second template and the main guide post.

[0012] In an embodiment of the invention, the length of the protruding support element is 0.5 to 3 times the thickness of the second template.

[0013] Preferably, the length of the protruding support element is twice the thickness of the second template.

[0014] In other embodiments, the protruding support element includes a first roller bearing configured to roll on the first inner guide surface of the guide rail.

[0015] The first roller bearing may include one or more rollers, such as rollers, cylinders, balls, tracks, etc.

[0016] Preferably, the first inner guide surface of the guide rail and the first roller bearing that mates with it are arranged horizontally. Thus, the first inner guide surface of the guide rail and the first roller bearing can support the vertical force from the template acting on the second main guide rail column.

[0017] In some embodiments, the protruding support element may further include a second roller bearing configured to roll on a second inner guide surface of a guide rail, wherein the second inner guide surface of the guide rail is opposite to and faces the first inner guide surface of the guide rail. Like the first roller bearing, the second roller bearing may include one or more rollers, such as wheels, cylinders, balls, tracks, etc.

[0018] As an alternative to the above embodiments including roller bearing connections, the protruding support element may include a first external support surface configured to slide against the first internal guide surface of the guide rail.

[0019] Preferably, the first inner guide surface 71 and the first outer support surface 61 of the guide rail 70 are arranged horizontally. Thus, the first inner guide surface and the first outer support surface of the guide rail can bear the vertical force on the second template.

[0020] In another embodiment, the guide rail includes at least one second inner guide surface arranged opposite to and facing the first inner guide surface; and wherein the protruding support element includes a second outer support surface configured to slide against the second inner guide surface of the guide rail.

[0021] This provides additional support contact between the main guide post and the second template 30, and prevents vertical movement between the two.

[0022] In other embodiments, the support further includes a first internal support member disposed in a third opening through the support, wherein the first internal support member is configured to engage with a planar guide surface of the main guide post.

[0023] Therefore, in addition to the aforementioned support member, an additional support member is provided between the internal guide rail and the protruding support element.

[0024] In a preferred embodiment, at least a first internal support component of the support member engages with a first planar guide surface arranged perpendicular to a first internal guide surface of the guide rail. Thus, the support member provides support in a horizontal plane perpendicular to the longitudinal direction.

[0025] In another embodiment, the first internal support member includes a first internal support surface configured to slide against a planar guide surface of the main guide post. Alternatively, the first internal support member may include a roller bearing connection.

[0026] In another embodiment, the support further includes a second internal support member disposed in a third opening through the support member, wherein the second internal support member is configured to engage with another planar guide surface of the main guide post, the planar guide surface also being perpendicular to the first internal guide surface of the guide rail, and wherein the second internal support member is opposite to and faces the first internal support member. This prevents horizontal movement of the main guide post in a direction perpendicular to the longitudinal axis.

[0027] In another embodiment, the second internal support member includes a second internal support surface configured to slide against a second planar guide surface of the main guide post. Alternatively, the second internal support member may include a roller bearing connection.

[0028] In another embodiment, the support includes a third internal support member disposed in a third opening through the support, wherein the third internal support member is configured to engage with another planar guide surface of the main guide post, the planar guide surface being parallel to a first internal guide surface of the guide rail. This allows the support between the main guide post and the second template to be supported in the same direction as the support contact between the protruding support element and the first internal guide surface of the guide rail.

[0029] In another embodiment, the third internal support member includes a third internal support surface configured to slide against a third planar guide surface of the main guide post. Alternatively, the third internal support member may include a roller bearing connection.

[0030] In another embodiment, the support may further include a fourth internal support member disposed in a third opening through the support, wherein the fourth internal support member is configured to engage with a fourth planar guide surface of the main guide post, the fourth planar guide surface being parallel to the third planar guide surface and facing in the opposite direction. This prevents movement between the main guide post and the second template in the same direction as the support contact between the protruding support element and the first internal guide surface of the guide rail.

[0031] In another embodiment, the fourth internal support member includes a fourth internal support surface configured to slide against a fourth planar guide surface of the main guide post. Alternatively, the fourth internal support member may include a roller bearing connection.

[0032] In another embodiment, the main guide rail system of the mold box may include a first main guide rail post and a second main guide rail post, wherein each of the first and second main guide rail posts has a rectangular cross-section perpendicular to the longitudinal axis. In another embodiment, the first main guide rail post extends through an opening in the second mold plate, wherein the opening through the second mold plate is centrally formed near the upper edge of the second mold plate, and wherein the second main guide rail post extends through another opening in the second mold plate, which is centrally formed near the lower edge of the second mold plate.

[0033] However, the main guide rail system of the mold box may also include only one main guide rail post. In this case, preferably, the single main guide rail post extends through a second opening in the second template, the opening through the second template being formed at the center of the second template.

[0034] In a second aspect, the object of the present invention is achieved by an injection molding machine that includes a mold box according to the first aspect of the present invention.

[0035] More specifically, in a second aspect, the object of the invention is achieved by an injection molding machine comprising: - Mounting rack; - A mold box in any of the embodiments described above in relation to the first aspect of the present invention; - A linear drive mechanism for moving the second template; and -Injection portion The second template is movably arranged relative to the first template and is driven by the linear drive mechanism.

[0036] It should be emphasized that, when used in this specification, the term "comprising" and its grammatical variations mean the presence of the declared feature, integer, step, or component, but do not preclude the presence or addition of one or more other features, integers, steps, components, or groups thereof. Attached Figure Description

[0037] The invention will be described in more detail below with reference to the embodiments shown in the accompanying drawings. It should be emphasized that the embodiments shown are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0038] Figure 1 schematically shows the outline of a prior art injection molding machine; Figure 2 shows a perspective view of a component of a prior art mold box with two half-plates and a set of cylindrical main guide rails; Figure 3A A perspective view shows a mold box with a single centrally located rectangular main rail column; Figure 3B Previous view showed Figure 3A The mold box; Figure 3C Shown in cross-sectional side view Figure 3A and 3B The mold box; Figure 4A Shown in perspective Figure 3A -C's shape when the mold box is in the second position; Figure 4B Previous view showed Figure 4A The mold box; Figure 4C Shown in cross-sectional side view Figure 4A and 4B The mold box; Figure 5 Shown in exploded perspective view Figure 3A -C and 4A-C mold boxes; Figure 6 A perspective view shows a mold box with a single rectangular master rail post, wherein the master rail post is offset relative to the center of the half plate of the mold box; Figure 7 A mold box according to another embodiment of the present invention is shown in perspective view; Figure 8A A perspective view shows a portion of a support member and half-plate, and a portion of a main rail post with an internal track, according to an embodiment of the present invention. Figure 8B Shown in perspective Figure 8A The support and half plate, and a part of the main rail post with internal rails, wherein the support and the main rail post are separated from each other. Figure 9A The perspective view shows the effect of viewing from a different angle. Figure 8A -B's support components, half-plate, and main rail post with internal track; Figure 9B Shown in perspective Figure 9A The support and half plate, and a part of the main rail post with internal rails, wherein the support and the main rail post are separated from each other. Figure 10 A schematic side view shows a portion of a half-plate and a main rail post with internal tracks, representing one embodiment of the invention. Figure 11 It shows Figure 10The cross section of the half plate and the main rail post with internal track, perpendicular to its longitudinal axis, passes through the main rail post. Figure 12 A perspective view shows a mold with a half-plate and a rectangular main rail post with an internal track, representing another embodiment of the invention. Figure 13 The previous view shows another embodiment of the connection between the template and the rectangular master rail post with internal tracks; and Figure 14 A schematic diagram of a prior art support running on a main guide post is shown to illustrate the locking effect. Detailed Implementation

[0039] Figure 1 schematically illustrates an injection molding machine 200 known in the prior art. The injection molding machine 200 typically includes an injection portion 210 shown on the left side of the figure and a clamping portion 270 shown on the right side. The injection portion 210 is responsible for injecting plastic material into a mold formed in the clamping portion 270 of the injection molding machine 200. The injection portion 210 and the clamping portion 270 of the injection molding machine 200 can be attached to a mounting bracket 201.

[0040] The injection molding machine 200 typically operates as follows: Plastic granules 105 are supplied through a hopper 240 into the barrel 260 of the reciprocating screw 220 of the injection section 210. The reciprocating screw 220 is driven by a drive mechanism 230, such as an electric motor. The plastic granules 105 supplied through the hopper 240 are then conveyed towards the clamping section 270 by the reciprocating screw, while being compressed, and are heated by a heating device 250 surrounding the reciprocating screw 220 until they melt and reach a suitable viscosity at the nozzle 225 at the inlet of the clamping section 270 with the mold. The mold is formed in the mold box 1.

[0041] Fluid plastic material is supplied from nozzle 225 through sprue 226 in base plate 10 of mold box 1 and reaches mold cavity 21 formed in first template 20 of mold box 1. First template 20 of mold box 1 is connected to base plate 10. Base plate 10 is connected to mounting bracket 201. Second template 30 of mold box 1, which may include other parts of mold core and / or mold cavity, is movably arranged relative to first template 20, so that mold box 1 can be fully closed (clamped together) to allow injection of molten plastic, and mold box 1 can be opened to remove molded object 100 (see FIG. 2). First template 20 and second template 30 of mold box 1 may also be referred to as half-plates. Therefore, first template 20 of mold box 1 may also be referred to as first half-plate, and second template 30 of mold box 1 may also be referred to as second template.

[0042] In Figure 1, the second template 30 is attached to a movable pressure plate 290. The movable pressure plate 290 and the second template 30 are slidably arranged on a set of cylindrical guide rails 400. Typically, the clamping portion 270 of the injection molding machine 200 includes four cylindrical guide rails 400 for guiding the movement of the movable pressure plate 290 and the second template 30. The movement of the movable pressure plate 290 and the second template 30 is performed by a linear drive mechanism 280, which is typically a hydraulic mechanism.

[0043] The movable pressure plate 290 with the second template 30 includes a through sliding bearing to slidably receive the cylindrical master guide rail 400.

[0044] During injection, the linear drive mechanism 280 clamps the first mold plate 20 and the second mold plate 30 together, so that plastic is injected from the reciprocating screw 220 into the mold cavity 21 through the nozzle 225. Once the mold cavity 21 is completely filled with plastic and has cooled sufficiently to solidify, the linear drive mechanism 280 removes the second mold plate 30 from the first mold plate 20, and the molded object is ejected from the mold cavity 21 in the first mold plate 20. The ejection of the molded object 100 is typically accomplished by an ejector pin (not shown) formed in / through the base plate 10.

[0045] Figure 2 illustrates a prior art mold box 1 and molded object 100 for an injection molding machine 200 (as shown in Figure 1). The mold box 1 is shown in a separated state, with the molded object 100 visible between two half-plates or templates 20, 30 of the mold box 1. Therefore, the mold box 1 comprises two templates 20, 30. A first template 20 (shown herein as a mold cavity 21 including the mold) is connected to a base plate 10 of the mold box 1. The first template 20 and the base plate 10 may form a single integral part, or they may be formed as separate parts and then joined together by a suitable means (e.g., bolted connection). The mold cavity 21 is formed as a recess in the surface of the first template 20.

[0046] The first template 20 is connected to the injection molding machine 200 via the base plate 10, as described above. The base plate 10 can then be connected to the mounting bracket 201, as shown in Figure 1.

[0047] The second template 30 is movably arranged relative to the first template 20 and the injection molding machine 200. The second template 30 is slidably arranged on a set of cylindrical main guide rails 400 of a main guide rail system configured to guide the second template 30 to move linearly away from and toward the first template 20.

[0048] This set of cylindrical main guide rails 400 includes four cylindrical main guide rails 400. The cylindrical main guide rails 400 are arranged to slide on a support (not shown) that passes through the second template 30 or through a movable pressure plate 290 on which the second template 30 is mounted. In Figure 2, only a portion of the cylindrical main guide rails 400 is visible.

[0049] The cylindrical main guide rail 400 is securely fixed in the opening 24 provided in the first template 20. Each main guide rail 400 has one opening 24.

[0050] In Figure 2, the main guide rail extends through the second template 30 itself, in contrast to the version shown in Figure 1, where the second template 30 is connected to a movable pressure plate 290 having supports for the cylindrical main guide rail 400.

[0051] The second template 30 is shown to have a core 31 configured to engage with a cavity 21 in the first template 20 to form a shape corresponding to the molded object 100.

[0052] Figures 3-5 show a mold box 1 with a single centrally located rectangular cross-section main guide post 40, instead of a set of cylindrical main guide posts 400 shown in Figures 1 and 2. This invention relates to a main guide post 40 with such a rectangular cross-section, which will be described first before the invention is further detailed below.

[0053] The mold box 1 includes a base plate 10 and a first template 20 connected to the base plate 10. During use in the injection molding process, the first template 20 is fixedly positioned relative to the base plate 10. The base plate 10 can be fixedly connected to an injection molding machine, such as that described in the prior art injection molding machine 200 shown in conjunction with FIG. 1. The first template 20 may include one or more mold cavities (not shown) formed as recesses in a first surface 22 of the first template 20. The other side, i.e., the second side 23, of the first template 20 faces the base plate 10, see, for example, see... Figure 5 .

[0054] The first template 20 can be integrally formed with the base plate 10, or as shown in Figures 3-5, it can be formed as a separate component and subsequently joined / connected, so that the first template 20 is fixed to the base plate 10 at least during the injection molding process. The first template 20 can be connected to the base plate 10 using, for example, bolts.

[0055] In other embodiments not shown, one or more mold cavities (not shown) may be formed in one or more mold boxes, which may be attached to a first surface 22 of the first template 20 or inserted into a suitable recess in the first surface 22 of the first template 20.

[0056] In addition, the first mold plate 20 and / or the base plate 10 may be equipped with runners 226 and runners (not shown in Figures 3-13) required to connect one or more cavities of the first mold plate 20 to the injection nozzles 225 of the injection molding machine 200 (e.g., the injection molding machine shown in Figure 1).

[0057] The mold box 1 shown in Figure 3-5 also includes a second template 30. The second template 30 is movably arranged relative to the first template 20. Thus, the second template 30 is also movably arranged relative to the base plate 10.

[0058] As shown in Figures 3-5, the mold box 1 also includes a main guide rail system 40', which is configured to guide the second template 30 to move linearly away from and toward the first template 20.

[0059] The main guide rail system 40' allows the second template 30 to be movably arranged relative to the base plate 10.

[0060] In other embodiments not shown, the first template 20 may also be movably arranged relative to the base plate 10, and the injection molding machine 200 further includes means for moving the first template 20 on the main guide rail system 40'.

[0061] In another embodiment (not shown), the mold box 1 may include a third plate (not shown) disposed between the first template 20 and the base plate 10, for example, in which flow channels are arranged. Such a third plate may be fixed relative to the base plate 10, or may be movable on the main guide rail system 40' to facilitate deformation of the flow channels.

[0062] As shown in Figure 3-5, the main guide rail system 40' consists of only a single main guide rail post 40. In principle, the main guide rail system 40' can include more than one main guide rail post, but only one is required.

[0063] Figure 7 An embodiment is shown where the mold box 1 includes two main guide posts 40 (a first main guide post 40 and a second guide post 40). The first main guide post 40 extends through an opening 140 through a support member 50 formed in the second mold plate 30. The opening 140 through the support member 50 of the second mold plate 30 is formed near the upper edge 34 of the second mold plate 30 and is centered along the edge 34. Furthermore, the second main guide post 40 extends through another opening 140 through the second support member 50 formed in the second mold plate 30. This opening 140 is formed near the lower edge 35 of the second mold plate 30 and is centered along the edge 35.

[0064] Returning to Figure 3-5, the main guide post 40 is elongated, having a first end 43 and a second end 44, an elongated body portion 41 extending between the first end 43 and the second end 44, and a longitudinal axis A. The main guide post 40 has a cross-sectional shape perpendicular to the longitudinal axis A.

[0065] The cross-section / cross-sectional shape forms a polygon.

[0066] It should be noted that a polygon or polygonal shape refers to any two-dimensional shape formed by straight lines. Triangles, quadrilaterals, pentagons, and hexagons are all examples of polygons.

[0067] There are two main types of polygons—regular polygons and irregular polygons. Regular polygons have equal side lengths and equal angles between each side. Any other polygon is an irregular polygon; by definition, its side lengths are not equal and the angles between its sides are also not equal. In principle, the cross-section of the guide post of this invention can have any polygonal shape.

[0068] However, as shown in Figures 3-5, in a preferred embodiment, the polygon can be a rectangle or a square.

[0069] In some embodiments, the longer side of the rectangular cross-section / cross-sectional shape may be arranged vertically. Therefore, the orientation of the rectangular shape of the main guide post 40 is such that the longer side of the rectangular shape extends vertically, while the shorter side extends horizontally.

[0070] In any case, each master rail post 40 having a polygonal cross-sectional / cross-sectional shape results in the master rail post 40 having a set of planar guide surfaces 45', 45'', 46', 46'' for mating with support elements 51 arranged on the second template 30. The number of planar guide surfaces on the master rail post 40 depends on the number of sides of the polygonal cross-sectional / cross-sectional shape of the master rail post 40. The master rail post 40 with a rectangular cross-section shown in Figures 3-5 and 6-7 has two wider planar guide surfaces 45', 45'' and two narrower planar guide surfaces 46', 46''. The two wider planar guide surfaces 45', 45'' are parallel to each other and formed on opposite sides of the master rail post 40. Similarly, the two narrower planar guide surfaces 46', 46'' are parallel to each other and formed on opposite sides of the master rail post 40, but perpendicular to the two wider planar guide surfaces 45', 45''.

[0071] The second template 30 may include one or more mold cores 31 (not shown in Figures 3-13) extending outward from the first surface 32 of the second template 30 and facing the first surface of the first template 20. The second surface 33 on the other side of the second template 30 faces away from the first template 20 and the base plate 10, for example, see... Figure 5The second template 30 is movably arranged relative to the first template 20, so that the mold box can be completely closed (clamped together) to allow injection of molten plastic into the mold cavity formed between the first template 20 and the second template 30, and the mold box 1 can be opened to remove the molded object, such as the molded object 100 similar to that shown in FIG2.

[0072] Similar to the case of the first template 20 described above, in some other embodiments not shown, one or more mold cores (and / or other portions of the mold cavity, not shown) may be formed in one or more mold boxes, which may, for example, be attached to the first surface 32 of the second template 30 or inserted into appropriate recesses within the first surface 32 of the second template 30.

[0073] Similar to the examples of the prior art described above, the mold box 1 of the present invention can form part of the clamping portion 270 of the injection molding machine 200. However, in this case, a single polygonal cross-section master guide post 40 (instead of the four cylindrical master guide posts 400 shown in FIG. 1) is used to guide the movement of the second mold plate 30. The movement of the second mold plate 30 is performed by a linear drive mechanism 280, which is, for example, a hydraulic mechanism.

[0074] As shown in Figure 3-13, the main guide post 40 extends through the second opening 130 in the second template 30. The second opening 130 in the second template 30 is a through opening that penetrates the second template 30.

[0075] The second opening 130 in the second template 30 preferably has a cross-sectional shape corresponding to the cross-sectional shape of the guide post 40, so that the guide post 40 can be slidably arranged therein.

[0076] As shown in Figure 3-5 and Figure 6 As shown, the main guide post 40 can also extend through the first opening 120 in the first template 20. The first opening 120 in the first template 20 is a through opening that penetrates the first template 20. The first opening 120 in the first template 20 preferably has a cross-sectional shape corresponding to the cross-sectional shape of the guide post 40, so that the guide post 40 can be received and fixedly anchored.

[0077] The main guide post 40 may have a main body portion 41 and a flange or protrusion 42, the flange or protrusion 42 having a larger cross-sectional area than the main body portion 41, for example, see Figure 5 In this case, for example, Figure 4CAs shown, the first opening 120 in the first template 20 may include a first segment 121 and a second segment 122. The first segment 121 is configured to receive a portion of the main body portion 41 of the main guide post 40, and the second segment 122 has a larger cross-sectional area than the first segment 121 and is configured to receive the flange 42 of the main guide post 40, for example, see [reference needed]. Figure 4C Therefore, the main guide post 40 may have a protrusion 41 at its first end 43, which is configured to engage with the enlargement 121 of the second opening 120 in the first template 20. Thus, the main guide post 40 can be anchored in the first opening 120 penetrating the first template 20.

[0078] In either case, as shown in Figures 3-5, the second opening 130 in the second template 30 is formed centrally within the second template 30. In this case, the first opening 120 in the first template 20 is also formed centrally within the first template 20.

[0079] In other embodiments, such as Figure 6 As shown, a single main guide post does not necessarily have to pass through the openings 120 and 130 centered in each template 20 and 30. Figure 6 An embodiment is shown in which a single main guide post 40 is arranged through a second opening 130 in a second template 30, the second opening 130 being located near the lower edge of the second template 30 and centered on the lower edge 35. Thus, it can be seen that in such embodiments, the first opening 120 through the first template would be arranged in a similar manner (the first template 20 in...). Figure 6 (Not shown in the image).

[0080] The one or more mold cavities may be formed around the first opening 120 in the first template 20. Furthermore, a mating mold core may be formed around a second opening in the movable second template 30.

[0081] Figure 3A -C shows, from a different view, the configuration of the mold box 1 according to an embodiment of the present invention in a first position, where the first template 20 and the second template 30 are in close contact and clamped together. The figure shows a position where plastic can be injected into a mold cavity (not shown) formed between the first template 20 and the second template 30. Accordingly, Figure 4A -C shows Figure 3A -C is positioned in the second position, where the first template 20 and the second template 30 are separated from each other. The figure shows the position from which the molded object can be removed from the mold cavity.

[0082] In any of the above cases, as shown in the figure, the second opening 130 in the second template 30 may be provided with a support member 50, such as a sliding bearing. In this case, the second opening 130 in the second template 30 can be configured to receive the support member 50.

[0083] The support member 50 includes a support element 51, the inner surface of which is configured to contact the planar guide surfaces 45', 45", 46', 46" of the main guide post 40. For example... Figure 5 As shown, the support member 50 may have a main body portion 51 and a flange 52, the flange having a cross-sectional area larger than the main body portion 51. In this case, the second opening 130 in the second template 30 may include a first segment 131 and a second segment 132, the first segment 131 being configured to receive the main body portion 51 of the support member 50, and the second segment 132 having a larger cross-sectional area than the first segment 131 and being configured to receive the flange 52 of the support member 50, for example, see... Figure 4C .

[0084] As shown in Figures 3-6, the main guide post 40 extends through a third opening 140 formed in the support member 50. The third opening 140 in the support member 50 is a through opening that penetrates the support member 50. The third opening 140 in the support member 50 preferably has a cross-sectional shape corresponding to the cross-sectional shape of the guide post 40, so that the guide post 40 can be slidably arranged therein.

[0085] exist Figure 7 In the embodiment shown with two main guide posts 40, the support member 50 as described above can be disposed between each main guide post and the second template 30.

[0086] One problem with this type of main guide post with a polygonal cross-section is that torsional forces exist between one, two, or more main guide posts 40 and the second template 30, as well as any other plates that may be slidably arranged on the main guide posts 40. During use, these torsional forces will inevitably affect the movable second template 30. These torsional forces may cause the second template 30 (and / or other plates) to tilt slightly relative to the main guide posts 40. This can lead to increased wear on the support 50 (between the main guide 40 and the template 30) and / or on the main guide 40, and in some cases, there is even a risk that the second template 30 may lock into the main guide post 40.

[0087] Figure 14 This locking effect is illustrated in the prior art, where a cylindrical main guide post 40 has a support 50 slidably arranged thereon. If pressure (from...) Figure 14Arrow A' indicates that when force A' is applied to the support member (e.g., via the second template) at a longitudinal distance D from the main guide post 40, the support member 50 may tilt slightly relative to the main guide post 40. As shown by arrows B' and C', this slight torsion of the support member 50 may cause the surface portion of the support member 50 to exert greater pressure on the main guide post 40, i.e., this increases the frictional force in the Z direction, as shown at the point or location of the support member 50 in the attached figure. This increases wear on the support surface and the main guide post 40. In some cases, this may even cause the support member 50 (and thus the movable second template 30) to lock onto the main guide post 40, which is highly undesirable. This occurs when the frictional force in the Z direction between the support member 50 and the main guide post 40 at the point / location shown by arrows B' and C' becomes greater than the force A' applied in the Z direction. This can be referred to as a locking effect or locking mechanism.

[0088] exist Figure 14 The cylindrical master guide post 40, in conjunction with existing technology, explains this locking effect. However, it should be understood that polygonal (e.g., rectangular) master guide posts, as described above, also pose a similar risk of locking effect (or increased wear).

[0089] This invention reduces this problem.

[0090] In one aspect of the invention, this problem can be overcome by using a main guide post 40 having a rectangular cross-section and long side surfaces arranged vertically, for example as shown in Figures 3-13, wherein the main guide post has a rectangular cross-section having two wider planar guide surfaces 45', 45'' and two narrower planar guide surfaces 46', 46''. The two wider planar guide surfaces 45', 45'' are parallel to each other and formed on opposite sides of the main guide post 40. Similarly, the two narrower planar guide surfaces 46', 46'' are parallel to each other and formed on opposite sides of the main guide post 40, but perpendicular to the two wider planar guide surfaces 45', 45''.

[0091] However, it has been shown that further guidance may be needed to stabilize the movement of the second template 30 or any other pressure plates moving on the main guide post 40. One solution to this problem is shown in Figure 8-13.

[0092] The embodiments shown in Figures 8-13 also relate to a mold box 1 for an injection molding machine (e.g., the injection molding machine 200 shown in Figure 1). In this case, the mold box 1 also includes a first template 20 and a second template 30, wherein at least the second template 30 is movably arranged relative to the first template 20 along the longitudinal axis A along the main guide rail system 40.

[0093] As described above, the main guide rail system is configured to guide the second template 30 to move linearly away from and toward the first template 20, and the main guide rail system 40' may include one or more main guide rail posts 40 in the same manner as described above. Also as described above, each main guide rail post 40 may have a rectangular cross-section perpendicular to the longitudinal axis (A).

[0094] The present invention differs from the description above in that it has a guide rail 70 formed in the sidewall of the main guide post 40. The guide rail 70 is formed as an elongated notch in one sidewall of the rectangular main guide post 40. The guide rail 70 extends along the entire length of the main guide post 40, or at least extends a distance, in a longitudinal direction defined by its longitudinal axis A, along which the second template 30 is slidably translated. The guide rail 70 includes at least one guiding surface, namely, a first internal guiding surface 71. Figure 10 and 11 The first internal guide surface 71 can be seen in the middle. Figure 10 This is a side view of the embodiment shown in Figures 8-9. Figure 11 This is a cross-sectional view through this embodiment.

[0095] like Figure 8A As shown in -B and 9A-B, and similarly as described above, each main guide post 40 extends through a third opening 140, which is formed through a support 50 arranged between each main guide post 40 and the second template 30. Figure 8A In -B and 9A-B, the support 50 is shown in perspective from two different sides of the rectangular main guide post 40. Figure 8B and 9B The diagram shows the main guide rail 30, support member 50, and second template 30 in an assembled state, wherein the support member 50 is slidably arranged on / connected to the main guide rail post 40. Figure 8B , 9B They respectively showed the same as Figure 8A , 9A The same situation applies, except that the main guide rail 30 is removed from the support member 50 and the second template 30.

[0096] A protruding support element 60 extends from a third opening 140 formed in the support member 50 into the guide rail 70. The protruding support element 60 connects to the support element 51 or the second template 30 of the support member 50. As shown in Figures 8-11, the protruding support element 60 can be formed by two parallel rollers 66. (The following will refer to the combination...) Figure 12-13 Other embodiments of the prominent support element 60 are described.

[0097] In any case, the protruding support element 60 forms a support contact with the first inner guide surface 71 of the guide rail 70.

[0098] As shown in Figures 8-9, the main guide post 40 extends through a third opening 140 through the support member 50, which can be arranged in the second opening 130 formed through the second template 30 in the same manner as described above. Therefore, in such an embodiment, the support member 50 includes a separate support unit comprising a support element 51 separate from the second template 30. However, in other embodiments not shown, at least some portions of the support member 50 arranged between the main guide post 40 and the second template 30 can be directly connected to portions of the second template 30. For example, a protruding support element 60 can be directly connected to the second template 30.

[0099] In embodiments not shown, the rectangular cross-sectional shape of the main guide post 40 may include equal side lengths, i.e., the cross-sectional shape is a square. However, also as mentioned above, in order to reduce the risk of the second template 30 tilting relative to the main guide post, the orientation of the rectangular shape of the main guide post 40 is such that the long side of the rectangle extends vertically, while the short side (relative to the vertical side) extends horizontally.

[0100] As shown in Figure 8-13, the guide rail 70 is preferably formed in the side wall of the main guide rail post 40, which is the longer side of the rectangular cross-section of the main guide rail 40.

[0101] As described above and shown in Figures 8-11, in some embodiments, the protruding support element includes a first roller bearing 65 configured to roll on the first inner guide surface 71 of the guide rail 70. The first roller bearing 65 may include one or more rollers 66, such as wheels, cylinders, balls, tracks, etc. In Figures 8-11, the first roller bearing 65 is implemented by two rollers 66 in the form of wheels, which are configured to cooperate with the first inner guide surface 71, which is horizontally arranged as shown in Figures 8-11. Thus, the first inner guide surface 71 of the guide rail 70 and the first roller bearing 65 can withstand vertical forces on the second template 30 and the main guide post 40.

[0102] It should be understood that in some embodiments not shown, in addition to the first roller bearing 65 shown, the protruding support element 60 may also include a second roller bearing configured to roll on a second inner guide surface of the guide rail 70. The second inner guide surface of the guide rail 70 is arranged opposite to and facing the first inner guide surface 71 of the guide rail 70. Like the first roller bearing 65, the second roller bearing may include one or more rollers, such as rollers, cylinders, balls, tracks, etc. This provides additional support contact between the main guide post 40 and the second template 30 and prevents them from rolling in the vertical direction. Figure 10 , 11Move along the Y direction (as in 13).

[0103] As an alternative to one or more roller bearings 65 formed in the main guide rail 70 and the protruding support element 60 connected to the second template 30, a sliding bearing may be provided. (Refer to below) Figure 12 and 13 An example illustrating this situation.

[0104] exist Figure 12 and 13 In this configuration, a protruding support element 60 is formed as a block of material extending through the inner wall / side surface of the third opening 140, which forms a support member 50 between the main guide post and the second template 30. The protruding support element 60 includes a first outer support surface 61 configured to slide against a first inner guide surface 71 of the guide rail 70.

[0105] In this case, such as Figure 12 and 13 As shown, the first inner guide surface 71 and the first outer support surface 61 of the guide rail 70 are preferably arranged horizontally. Thus, the first inner guide surface 71 and the first outer support surface 61 of the guide rail 70 can bear the vertical force on the second template 30.

[0106] For example Figure 12 and 13 As shown, the protruding support element 60 is formed as a block of material extending through the support element 51 from the inner wall / side surface of the third opening 140. In some embodiments, the support element 51 may additionally or alternatively include a second outer support surface 62 arranged opposite to and facing away from the first outer support surface 61. Furthermore, in this case, the guide rail 70 includes at least one second inner guide surface 72, which is arranged opposite to and facing the first inner guide surface 71 of the guide rail 70. The second outer support surface 62 is configured to slide against the second inner guide surface 72 of the guide rail 70.

[0107] This provides additional support contact between the main guide post 40 and the second template 30, and prevents both from moving in the vertical direction.

[0108] It should be noted that, as shown and described above, the length L of the support member 50 in the direction along the longitudinal axis A is related to the thickness T of the second template 30 (e.g., Figure 12 (As shown). Therefore, in such an embodiment, the end of the support element 50 is flush with the first surface 32 and the second surface 33 of the second template 30.

[0109] However, in some embodiments, such as Figure 12 As shown, the support element 51 may be provided with a flange 80 extending in the direction along the longitudinal axis A and projecting away from the second surface 33 of the second template 30, such that the length of the projecting support element 60 and the length of the first outer support surface 61 and / or the second outer support surface 62 can be extended relative to the aforementioned embodiment. This increases the stiffness of the connection between the main guide post 40 and the second template 30 along the longitudinal axis A, thereby resisting the surrounding... Figure 13 The twist / rotation in the X direction shown above, i.e., the reduction of the combination mentioned above. Figure 14 The lock-in effect is explained.

[0110] It should be noted that, although this elongation of the protruding support element 60 is explained in conjunction with the sliding bearing (e.g., Figure 12 and 13 (as shown), but in the case of the first and / or second roller bearing 65 as described above, a similar elongation of the protruding support element 60 can also be achieved.

[0111] Therefore, more generally, the protruding support element 60 may have a length L greater than the thickness T of the second template 30.

[0112] Typically, the relationship between the length L of the protruding support element 60 and the thickness T of the second template 30 is adapted to reduce the locking effect. Such a guide rail 70 (especially in combination with the increased length L of the additional guide surface and / or support) allows for the use of a thinner template 30 (reducing T), thereby reducing the weight of the mold box 1.

[0113] In one embodiment, the length L of the protruding support element 60 is twice the thickness T of the second template 30.

[0114] The support connection between the protruding support element 60 and the guide rail 70 was described above.

[0115] In addition, a further support connection can be provided between the outer surface of the main guide post 40 and the inner surface of the third opening 140 formed through the support element 51. This will improve the relative stability of the connection between the main guide post 40 and the second template 40.

[0116] Therefore, in some embodiments, the support member 50 further includes first internal support members 55', 55”, 56', 56” disposed in a third opening 140 through the support member 50, wherein the first internal support members 55', 55”, 56', 56” are configured to cooperate with one of the planar guide surfaces 45', 45”, 46', 46” of the main guide post 40. The first internal support members 55', 55”, 56', 56” may be roller bearings comprising one or more rollers 66, for example, in the form of rollers, cylinders, balls, tracks, etc. In other embodiments, the first internal support members 55', 55”, 56', 56” may be sliding bearings.

[0117] In a preferred embodiment, at least the first internal support member 55' of the support member 50 cooperates with the first planar guide surfaces 45', 45" arranged perpendicular to the first internal guide surface 71 of the guide rail 70. Therefore, the support member provides support in the horizontal plane.

[0118] In one embodiment, the first internal support member 55' includes a first internal support surface 145', which is configured to slide against the planar guide surface 45' of the main guide post 40. This is in Figure 11 and Figure 13 As shown in the figure. Alternatively, the first internal support member 55' may include a roller bearing connection (not shown).

[0119] In another embodiment, the support 50 may further include a second inner support member 55” disposed in a third opening 140 passing through the support 50. The second inner support member 55” is configured to engage with another planar guide surface (i.e., the second planar guide surface 45” of the main guide post 40). The second planar guide surface 45” is also perpendicular to the first inner guide surface 71 of the guide rail 70. The second inner support member 55” is arranged opposite to and facing the first inner support member 55’. This prevents the second template 30 from being in a horizontal direction (along the main guide post 40) relative to the main guide post 40. Figure 13 (X) moves.

[0120] In one embodiment, such as Figure 11 and Figure 13 As shown, the second internal support member 55” includes a second internal support surface 145”, which is configured to slide against the second planar guide surface 45” of the main guide post 40. Alternatively, the second internal support member 55” may include a roller bearing connection (not shown).

[0121] In other embodiments, the support member 50 may further include a third internal support member 56' disposed in a third opening 140 passing through the support member 50. The third internal support member 56' is configured to cooperate with another planar guide surface 46' of the main guide post 40, which is parallel to the first internal guide surface 71 of the guide rail 70. This can support the support connection between the main guide post 40 and the second template 30 in the same direction as the support contact between the protruding support element 60 and the first internal guide surface 71 of the guide rail 70.

[0122] In one embodiment, the third internal support member 56' includes third internal support surfaces 146', 146'', which are configured to slide against the third planar guide surface 46' of the main guide post 40, such as... Figure 13 As shown. Alternatively, the third internal support component 56' may include a roller bearing connection (not shown).

[0123] Furthermore, in another embodiment, the support member 50 may include a fourth internal support member 56”, which is also arranged in the third opening 140 through the support member 50. The fourth internal support member 56” is configured to cooperate with a fourth planar guide surface 46” of the main guide post (40), which is parallel to the third planar guide surface 46’ and faces in the opposite direction. This prevents the support connection between the main guide post 40 and the second template 30 from being in the same direction as the support contact between the protruding support element 60 and the first internal guide surface 71 of the guide rail 70 (i.e., the vertical direction). Figure 13 (The middle is the Y direction) moves upwards.

[0124] In one embodiment, the fourth internal support member 56” includes a fourth internal support surface 146”, which is configured to slide against the fourth planar guide surface 46” of the main guide post 40, such as Figure 13 As shown. Alternatively, the fourth internal support component 56” may include a roller bearing connection (not shown).

[0125] It should be noted that in any embodiment where the main guide post 40 is described as having guide rails (Figures 8-13), the main guide rail system 40' of the mold box 1 can be coupled with... Figure 7 The manner shown also includes a first main guide post 40 and a second main guide post 40, wherein each of the first main guide post 40 and the second main guide post 40 has a rectangular cross-section perpendicular to the longitudinal axis A.

[0126] Therefore, in some other embodiments, the first main guide post 40 extends through an opening 130 in the second template 30, wherein the opening 130 through the second template 30 is centrally formed adjacent to the upper edge 34 of the second template 30, and the second main guide post 40 extends through another opening 130 in the second template 30, which is centrally formed adjacent to the lower edge 35 of the second template 30.

[0127] However, another option is that the main guide rail system 40' of the mold box 1 may also consist of only a single main guide rail post 40, as shown in Figures 3-6. In this case, preferably, the single main guide rail post 40 extends through a second opening 130 in the second template 30, and the opening 130 through the second template 30 is centrally formed in the second template.

[0128] It is also evident from the above description that the mold box 1 of the present invention can be used in the injection molding machine as described above. Therefore, in another aspect, the present invention relates to an injection molding machine 200, which includes: - Mounting bracket 201; -The mold box 1 as described in any of the above embodiments; - A linear drive mechanism 280 for moving the second template 30; and -Injection portion 210, The second template 30 is movably arranged relative to the first template 20 and is driven by the linear drive mechanism 280. In the embodiments shown in Figures 3-5, the first template 20 and the second template 30 are rectangular or square, while... Figure 12 In this embodiment, the first template 20, the second template 30, and the base plate 10 have relatively complex shapes. The base plate 10, the first template 20, and the second template 30 show openings 16, 26, and 36, through which mold boxes having flow channels, mold cavities, and mold cores, respectively, can be inserted into the support of the plate from the side.

[0129] It should be noted that the accompanying drawings and the above description illustrate some exemplary embodiments in a simple and schematic manner. Many specific mechanical details have not been shown because such details are familiar to those skilled in the art and would only unnecessarily complicate the description.

[0130] Parts list

[0131] 1 mold box

[0132] 10. Base plate

[0133] 20 First Template

[0134] 21. Mold cavity formed in the first template

[0135] 22 First surface of first template 20

[0136] 23 The second surface or side of the first template is opposite to the first surface and faces the base plate.

[0137] 24 An opening in the first template for receiving the master rail

[0138] 30 Second Template

[0139] 31 core, mold core

[0140] 32 The first surface of the second template, facing the first surface of the first template

[0141] 33 The second surface of the second template is opposite to the first template and the base plate, and is arranged in the opposite direction to the first surface of the second template.

[0142] 34. Top edge of the second template

[0143] 35. The lower edge of the second template

[0144] 40 dominant rail, slender dominant rail

[0145] 41. The slender main body of the main guide rail.

[0146] 42 A flange or protrusion of the main guide post having a larger cross-sectional area than the main body and formed at the first end of the main guide post.

[0147] 43. The first end of the main guide rail

[0148] 44. The second end of the main guide post is opposite to the first end.

[0149] 45' Planar guide surface, the first planar guide surface of the main guide post.

[0150] 45” planar guide surface, the second planar guide surface of the main guide post.

[0151] 46' Planar guide surface, the third planar guide surface of the main guide post.

[0152] 46” Planar guide surface, the fourth planar guide surface of the main guide post.

[0153] 50 Supporting components arranged between the main guide rail and the second formwork.

[0154] 51 Support elements arranged between the main guide rail and the second template

[0155] 55. A first internal support member of the support is arranged in a third opening passing through the support.

[0156] 60. A protruding support element of the support member arranged between the main guide post and the second template.

[0157] 61. The first outer support surface of the protruding support element

[0158] 62. The second outer support surface of the protruding support element.

[0159] 65 First Roller Bearing

[0160] 66 rollers

[0161] 70 Guide rails formed in the sidewalls of the main guide rail column

[0162] 71 First internal guide surface of the guide rail

[0163] 72 The second inner guide surface of the guide rail is formed to face the first inner guide surface of the guide rail.

[0164] 73. The third internal guide surface of the guide rail

[0165] 100 molded objects

[0166] 105 Plastic Particles

[0167] 120 Passing through the opening formed by the first template, the first opening

[0168] 130 Through the opening formed by the second template, the second opening is used to receive the main guide post.

[0169] 140 through the third opening formed by the support member 50

[0170] 200 injection molding machine

[0171] Mounting frame for 201 injection molding machine

[0172] 210 Injection section of injection molding machine

[0173] 220 reciprocating screw

[0174] 225 nozzle

[0175] 226. Gating system in the base plate

[0176] 230 Drive mechanism for rotary reciprocating screw

[0177] 240 hopper

[0178] Heating device around the 250 reciprocating screw

[0179] 260 The reciprocating screw barrel of the injection section

[0180] Clamping part of 270 injection molding machine

[0181] 280 Linear Drive Mechanism

[0182] 290 Movable pressure plate

[0183] 400 cylindrical main guide rail

[0184] A. Longitudinal axis of the main guide rail

[0185] L refers to the length of the protruding support element.

[0186] The thickness of the second template (T)

Claims

1. A mold box (1) for an injection molding machine (200), the mold box (1) comprising: - First template (20); - A second template (30) is movably arranged relative to the first template (20) along the longitudinal axis (A); and - A master track system (40') configured to guide at least the second template to move linearly away from and toward the first template (20). The main guide rail system (40') includes a main guide rail post (40) having a cross-section perpendicular to the longitudinal axis (A). The cross-section is rectangular. The main guide post (40) extends through a third opening (140) through a support member (50) arranged between the main guide post (40) and the second template (30). The guide rail (70) is formed as an elongated notch in the sidewall of the main guide post (40) and includes a first internal guide surface (71); and The protruding support element (60) extends from the third opening (140) in the support (50) into the guide rail (70) and forms a support contact with the first inner guide surface (71) of the guide rail (70).

2. The mold box (1) as described in claim 1, wherein, The rectangular shape of the main guide post (40) is oriented such that the long side of the rectangle extends vertically and the short side extends horizontally.

3. The mold box (1) as described in claim 1, wherein, The guide rail (70) is formed in the side wall of the main guide post (40), which is the longer side of the rectangular cross-section of the main guide post (40).

4. The mold box (1) as described in claim 1, wherein, The protruding support element (60) has a length (L) greater than the thickness (T) of the second template (30).

5. The mold box (1) as described in any one of claims 1-4, wherein, The protruding support element (60) includes a first roller bearing (65) configured to roll on the first inner guide surface (71) of the guide rail (70).

6. The mold box (1) as described in any one of claims 1-4, wherein, The protruding support element (60) includes a first external support surface (61) configured to slide against the first internal guide surface (71) of the guide rail (70).

7. The mold box (1) as described in claim 6, wherein, The guide rail (70) includes at least one second inner guide surface (72) arranged opposite to and facing the first inner guide surface (71); and the protruding support element (60) includes a second outer support surface (62) configured to slide against the second inner guide surface (72) of the guide rail (70).

8. The mold box (1) as described in any one of claims 1-4, wherein, The support member (50) further includes a first internal support member (55', 55") disposed in a third opening (140) through the support member (50), wherein the first internal support member is configured to cooperate with a planar guide surface (45', 45" , 46', 46") of the main guide post (40).

9. The mold box (1) as described in claim 8, wherein, The first internal support component (55') of the support member (50) works in conjunction with the first planar guide surface (45', 45") arranged perpendicular to the first internal guide surface (71) of the guide rail (70).

10. The mold box (1) as described in claim 9, wherein, The support (50) further includes a third internal support member (56') disposed in a third opening (140) provided through the support (50), wherein the third internal support member (56') is configured to cooperate with another planar guide surface (46', 46") of the main guide post (40), the planar guide surface (46', 46") being parallel to the first internal guide surface (71) of the guide rail (70).

11. An injection molding machine, comprising: - Mounting bracket (201); -The mold box (1) as described in any one of claims 1-10; - A linear drive mechanism (280) for moving the second template (30); and -Injection portion (210). The second template (30) is movably arranged relative to the first template (20) and is driven by the linear drive mechanism (280).

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