Cylindrical paper-plastic forming template sleeve positioning and guiding structure

Abstract

The invention discloses a cylindrical paper-plastic forming template sleeve positioning and guiding structure, and relates to the field of pulp molding equipment, the cylindrical paper-plastic forming template sleeve positioning and guiding structure comprises a lower template, a bottom plate, a center shaft at the center position of the bottom surface of the lower template, an embedded center sleeve at the center position of the bottom plate, and a sliding sleeve fixedly assembled at the bottom of the center shaft; a balance pin is inserted into the bottom of the sliding sleeve, one end of the balance pin penetrates through the sliding sleeve to abut against the outer wall of the center shaft, and a plurality of high-precision spring balance systems are further arranged between the lower die plate and the bottom plate and used for elastically supporting the lower die plate so that the lower die plate can be kept in the horizontal state all the time. Real-time correction in the dynamic die assembly process is achieved, the compression amount on the plane of the whole formed product is ensured to be consistent, so that the thickness of the product is ensured to be uniform, the thickness deviation of the product is controlled within + / -0.1 mm, the phenomena of local overload and eccentric wear caused by non-parallel die pressing are effectively reduced, and the service life of a center sleeve and a sliding sleeve is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of paper pulp molding equipment, in particular to a cylindrical paper pulp molding template sleeve positioning and guiding structure. BACKGROUND

[0002] The paper pulp molding machine is a kind of equipment for processing paper pulp (made of plant fiber raw materials such as wood, bamboo, and sugar cane residue) into products with certain shape and strength through a specific process. Its core function is to convert liquid paper pulp into solid molded products, which are widely used in packaging (such as electronic products, food, medical devices), daily necessities (paper pulp molded tableware, trays, flowerpots, etc.), and industrial fields (automobile parts packaging, industrial product liners, etc.).

[0003] The existing paper pulp molding machine template positioning mostly uses a cylindrical positioning pin combined with a hole structure, which has the following problems:

[0004] 1. During the closing process, the positioning pin may collide with the hole wall due to slight deviation, causing wear.

[0005] 2. The template horizontal deviation cannot be automatically corrected, and the closing cannot be guided, resulting in uneven thickness of the molded product when pressing, affecting the product molding quality.

[0006] 3. The traditional rigid positioning structure cannot compensate for the instantaneous displacement deviation caused by equipment vibration.

[0007] 4. Dynamic imbalance problem caused by gravity shift during heavy template movement. SUMMARY

[0008] In order to overcome the above-mentioned defects of the prior art, the present application provides a cylindrical paper pulp molding template sleeve positioning and guiding structure to solve the problems in the above background.

[0009] The present application provides the following technical solution: a cylindrical paper pulp molding template sleeve positioning and guiding structure, comprising a lower template and a bottom plate, the lower template corresponds to the bottom plate, the center axis of the bottom surface of the lower template, the center of the bottom plate has an embedded center sleeve, the bottom of the center axis is fixedly assembled with a sliding sleeve, and the top of the sliding sleeve is slidingly embedded in the inside of the center sleeve, wherein the bottom of the sliding sleeve is inserted with a balance pin, and one end of the balance pin penetrates the sliding sleeve and abuts against the outer wall of the center axis for limiting the center axis, a plurality of high-precision spring balance systems are further arranged between the lower template and the bottom plate for elastically supporting the lower template, so that the lower template always maintains a horizontal state.

[0010] Preferably, the plurality of high-precision spring balance systems are arranged in a rectangular array between the lower template and the bottom plate.

[0011] Preferably, the high-precision spring balancing system comprises a screw rod and a spring, one end of the screw rod is fixedly installed on the bottom surface of the lower mold plate, the other end penetrates through the bottom plate and is limited by a nut, and the spring is sleeved on the screw rod and arranged between the lower mold plate and the bottom plate.

[0012] Preferably, the center shaft, the center sleeve and the sliding sleeve are all in cylindrical structures.

[0013] Preferably, the bottom of the center shaft is provided with a stepped platform, a locking sleeve is threadedly connected to the bottom of the center shaft, and the sliding sleeve is arranged between the stepped platform and the locking sleeve, the top of the sliding sleeve abuts against the stepped platform, and the bottom of the sliding sleeve abuts against the locking sleeve, so that the sliding sleeve is fixedly assembled at the bottom of the center shaft.

[0014] Preferably, the sliding sleeve is in a convex shape in cross section, the middle part of the sliding sleeve is provided with a circular hole matched with the center shaft, the convex part of the sliding sleeve is slidably embedded in the center sleeve, and the top surface of the base part of the sliding sleeve abuts against the bottom surface of the center sleeve.

[0015] Preferably, the circular hole at the position of the base part is spaced from the outer wall of the center shaft to form a correction gap, and one end of the balance pin extends into the correction gap.

[0016] Preferably, the bottom surface of the bottom plate is provided with a balance sleeve, the balance sleeve completely wraps the base part at the bottom of the sliding sleeve, and the bottom of the balance sleeve is provided with a groove for limiting the up-and-down movement of the balance pin on the sliding sleeve.

[0017] Preferably, the balance pin is four in number, and the four balance pins are located around the bottom of the sliding sleeve, wherein the bottom of the balance sleeve is provided with four grooves matched with the balance pins.

[0018] Compared with the prior art, the application has the following beneficial effects:

[0019] 1. The application realizes real-time correction in the clamping dynamic process, ensures the consistency of the compression amount on the whole product plane, thereby ensuring the uniformity of the product thickness, controls the product thickness deviation within ±0.1 mm, effectively reduces the local overload and eccentric wear caused by the non-parallel clamping of the mold, and prolongs the service life of the center sleeve and the sliding sleeve.

[0020] 2. The spring pre-tightening force of the high-precision spring balancing system and the circular face guiding force of the center sleeve and the sliding sleeve form mechanical balance, the spring is compressed to store energy during clamping, the inertia impact of the mold plate is offset, the spring releases energy during mold opening, and the rapid resetting is assisted, meanwhile, the application realizes self-adaptive guiding by a pure mechanical structure, does not need external complex sensors and active control systems, has compact structure, high reliability and convenient maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is an explosion structure schematic diagram of the application.

[0022] Figure 2 Assembled structure schematic diagram of lower mold plate and base plate of the present application.

[0023] Figure 3 Assembled structure schematic diagram of the present application.

[0024] Figure 4 Assembled structure schematic diagram of high-precision spring balance system of the present application.

[0025] Figure 5 Sectional structure schematic diagram of the present application.

[0026] Figure 6 Sleeve structure schematic diagram of the present application.

[0027] Figure 7 Compression structure schematic diagram of the present application.

[0028] Figure 8 Clamping state structure schematic diagram of the present application.

[0029] Figure 9 Correction process schematic diagram of the present application.

[0030] The figure marks are as follows: 1, lower mold plate; 2, center shaft; 21, stepped platform; 3, center sleeve; 4, sleeve; 41, circular hole; 42, protruding part; 43, base part; 44, correction gap; 5, locking sleeve; 6, balance pin; 7, balance sleeve; 71, groove; 8, base plate; 9, high-precision spring balance system; 91, screw rod; 92, spring. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present application are described in detail below with reference to the accompanying drawings, so that the advantages and features of the present application can be more easily understood by those skilled in the art, and the protection scope of the present application is more clearly defined.

[0032] The present application provides a cylindrical paper-plastic forming mold plate sleeve positioning and guiding structure, as shown in Figures 1-7 The present application provides a cylindrical paper-plastic forming mold plate sleeve positioning and guiding structure, as shown in

[0033] The installation principle is as follows: the lower mold plate 1 corresponds to the upper and lower base plates 8, and the lower mold plate 1 is used for installing and fixing the mold; the center shaft 2 is located at the bottom surface center position of the lower mold plate 1, and the center shaft 2 serves as the reference shaft of the entire structure and is rigidly fixed on a lower mold plate 1 of the equipment; the axis defines the clamping center line and the vertical direction in the ideal state.

[0034] The center position of the bottom plate 8 is embedded with a center sleeve 3, the bottom of the center shaft 2 is fixedly fitted with a sliding sleeve 4, and the top of the sliding sleeve 4 is slidingly embedded in the inside of the center sleeve 3, and the center sleeve 3 and the sliding sleeve 4 keep cylindrical cooperation, and in the process of mold compression, when the upper and lower molds start to contact the product or are forced, the center sleeve 3 moves axially relative to the sliding sleeve 4.

[0035] The bottom of the sliding sleeve 4 is inserted with a balance pin 6, and one end of the balance pin 6 penetrates the sliding sleeve 4 and abuts against the outer wall of the center shaft 2 for limiting the center shaft 2 to prevent the center shaft 2 from deviating, so as to realize preliminary correction of the center shaft 2, reduce the wear between the center sleeve 3 and the sliding sleeve 4, and be responsible for macro position correction with a correction accuracy of ±2mm.

[0036] A plurality of high-precision spring balance systems 9 are further arranged between the lower mold plate 1 and the bottom plate 8 for elastically supporting the lower mold plate 1, so that the lower mold plate 1 always keeps a horizontal state, that is, the lower mold plate 1 and the bottom plate 8 keep a parallel state. In the process of mold compression (that is, when the center sleeve moves in the sliding sleeve), the spring is compressed (as shown in the compressed state, the height becomes 82mm). This compression force generates a counterforce acting on the center sleeve 3 and the sliding sleeve 4. Figure 7

[0037] When there is a slight tilt or horizontal deviation of one side of the mold plate, the relative displacement amount of the center sleeve 3 in the sliding sleeve 4 of this side will be greater or less than the normal displacement amount, so that the dynamic compensation counterforce generated by the spring of this side is correspondingly increased or decreased. This unevenly distributed spring force acts on the tilted mold plate through the cooperation surface of the center sleeve 3 and the sliding sleeve 4, forming a moment or a direct force to correct the posture, so as to dynamically guide the parallelism of the upper / lower mold compression surface during the mold compression process, and to dynamically adjust the micro elastic compensation accuracy of ±0.5mm.

[0038] The application realizes real-time correction in the dynamic process of mold closing, ensures that the compression amount on the whole product plane is consistent, thereby ensuring that the product thickness is uniform, controlling the product thickness deviation within ±0.1mm, and effectively reducing the local overload and partial wear caused by the non-parallel mold compression, prolonging the service life of the center sleeve 3 and the sliding sleeve 4.

[0039] The spring pre-tightening force of the high-precision spring balance system 9 of the application and the circular surface guiding component force of the center sleeve 3 and the sliding sleeve 4 form a mechanical balance, the spring is compressed to store energy during mold closing, and the inertia impact of the mold plate is offset, the spring releases energy during mold opening, and assists in rapid resetting. At the same time, the application realizes self-adaptive guidance by pure mechanical structure, without the need for external complex sensors and active control systems, and has compact structure, high reliability and convenient maintenance.

[0040] In the embodiment, as shown in Figure 3 , Figure 4 , Figure 9 ​As shown, several high-precision spring balancing systems 9 are arranged in a rectangular array between the lower template 1 and the base plate 8. Several high-precision spring balancing systems 9 are used to elastically support 1, so that the lower template 1 always remains in a horizontal state and cooperates with the upper template to press the product. The product thickness deviation is controlled within ±0.1mm, and the lower template 1 is in a horizontal state, that is, it remains parallel to the base plate 8, so that the center sleeve 3 and the sliding sleeve 4 are always coaxial, thereby reducing the wear between the center sleeve 3 and the sliding sleeve 4.

[0041] Specifically, such as Figure 5 As shown, the high-precision spring balancing system 9 includes a screw 91 and a spring 92. One end of the screw 91 is fixedly mounted on the bottom surface of the lower template 1, and the other end passes through the base plate 8 and is limited by a nut. The spring 92 is sleeved on the screw 91 and placed between the lower template 1 and the base plate 8, so that the two ends of the spring 92 respectively abut the lower template 1 and the base plate 8. Since the bottom 8 is fixedly mounted on the base of the molding machine template, elastic support for the lower template 1 is achieved.

[0042] In this embodiment, the central shaft 2 , the central sleeve 3 , and the sliding sleeve 4 are all cylindrical structures, and the central shaft 2 , the central sleeve 3 , and the sliding sleeve 4 are coaxially arranged.

[0043] In this embodiment, a stepped platform 21 is provided at the bottom of the central shaft 2, to which a locking sleeve 5 is threadedly connected. The locking sleeve 5 is locked to the central shaft 2 or a related base via threads or other means, adjusting its initial compression on the spring system and thereby precisely setting the initial preload of the spring. The locking sleeve 5 employs a double-threaded design to improve adjustment accuracy and locking reliability. A sliding sleeve 4 is positioned between the stepped platform 21 and the locking sleeve 5, with its top abutting the stepped platform 21 and its bottom abutting the locking sleeve 5, securing the sliding sleeve 4 to the bottom of the central shaft 2.

[0044] In this embodiment, the cross-section of the sliding sleeve 4 is convex-shaped, and a circular hole 41 is provided in the middle thereof for assembly with the central shaft 2. The raised portion 42 of the sliding sleeve 4 slides and is embedded in the interior of the central sleeve 3, and the top surface of the base portion 43 of the sliding sleeve 4 abuts against the bottom surface of the central sleeve 3.

[0045] In this embodiment, there is a gap between the circular hole 41 at the base portion 43 and the outer wall of the center shaft 2 to form a correction gap 44. One end of the balancing pin 6 extends into the correction gap 44 and abuts against the outer wall of the center shaft 2, which is used to correct the position of the center shaft 2. The correction accuracy is ±2mm.

[0046] In this embodiment, a balancing sleeve 7 is provided at the center of the bottom surface of the base plate 8. The balancing sleeve 7 completely wraps the base portion at the bottom of the sliding sleeve 4. A groove 71 is provided at the bottom of the balancing sleeve 7 for limiting the upward and downward movement of the balancing pin 6 on the sliding sleeve 4.

[0047] In this embodiment, there are four balancing pins 6, which are located around the bottom of the sliding sleeve 4. Four grooves 71 are provided around the bottom of the balancing sleeve 7 to match the balancing pins 6. It can be explained here that the number of balancing pins 6 can be 8, 12, 16, etc. depending on the usage scenario or the size of the center sleeve 3 and the sliding sleeve 4.

[0048] The working principle of the present invention is as follows: when the mold is closed, the mold plate rises, and when the mold contacts the product, the mold closing force F begins to be generated;

[0049] Ideal parallel state: The symmetrically positioned center sleeve 3 and sliding sleeve 4 move equally, all springs are compressed to the same extent, the resulting compensation reaction force is uniform, parallelism is maintained, the center sleeve moves downward in the sliding sleeve, and the compressed spring reaches the designed stroke (e.g. 90mm-82mm);

[0050] There is a horizontal deviation state: assuming that the left side of the lower template 1 is lower, the mold contact force in the left area is greater, resulting in the relative displacement of the left center sleeve 3 in the sliding sleeve 4 being greater than that on the right side. The spring compression on the left side is greater, generating a stronger reaction force F1, and F1 is transmitted to the left sliding sleeve 4 through the left center sleeve 3 along the center axis direction, and the sliding sleeve 4 is fixed on the lower template 1. The stronger force Fl acts on the left area of ​​the lower template 1, forming an effect of lifting the left side upward or resisting excessive sinking of the left side. The right side force F2 is relatively small, and the right side of the lower template 1 sinks normally or slightly more. During the entire process of force compression of the lower template 1, the horizontal deviation is corrected / suppressed in real time by the uneven distribution of the spring force, forcing the upper / lower mold pressing surfaces to be parallel.

[0051] Several points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which can be mechanical connection or electrical connection, or internal communication between two elements, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may change.

[0052] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed in the present invention should be included in the protection scope recorded in the claims.

Claims

1. A cylindrical paper-plastic forming template sleeve positioning and guiding structure, comprising a lower template (1) and a base plate (8), wherein the lower template (1) corresponds to the base plate (8) in an upper and lower position, and is characterized in that: The center position of the bottom surface of the lower template (1) is the center axis (2), and the center position of the base plate (8) is embedded with a center sleeve (3). The bottom of the center axis (2) is fixedly equipped with a sliding sleeve (4), and the top of the sliding sleeve (4) is slidably embedded in the center sleeve (3), wherein a balancing pin (6) is inserted at the bottom of the sliding sleeve (4), and one end of the balancing pin (6) passes through the sliding sleeve (4) and abuts against the outer wall of the center axis (2) for limiting the center axis (2). A number of high-precision spring balancing systems (9) are also provided between the lower template (1) and the base plate (8) for elastically supporting the lower template (1) so that the lower template (1) always maintains a horizontal state.

2. The cylindrical paper-plastic forming template sleeve positioning and guiding structure according to claim 1, characterized in that: A plurality of high-precision spring balance systems (9) are arranged in a rectangular array between the lower template (1) and the base plate (8).

3. The cylindrical paper-plastic forming template sleeve positioning and guiding structure according to claim 2, characterized in that: The high-precision spring balancing system (9) comprises a screw (91) and a spring (92). One end of the screw (91) is fixedly mounted on the bottom surface of the lower template (1), and the other end passes through the base plate (8) and is limited by a nut. The spring (92) is sleeved on the screw (91) and placed between the lower template (1) and the base plate (8).

4. The cylindrical paper-plastic forming template sleeve positioning and guiding structure according to claim 1, characterized in that: The central shaft (2), central sleeve (3) and sliding sleeve (4) are all cylindrical structures.

5. The cylindrical paper-plastic forming template sleeve positioning and guiding structure according to claim 4, characterized in that: The bottom of the central shaft (2) is provided with a stepped platform (21), the bottom of the central shaft (2) is threadedly connected to a locking sleeve (5), and the sliding sleeve (4) is placed between the stepped platform (21) and the locking sleeve (5), with its top abutting against the stepped platform (21) and its bottom abutting against the locking sleeve (5), so that the sliding sleeve (4) is fixedly assembled on the bottom of the central shaft (2).

6. The cylindrical paper-plastic forming template sleeve positioning and guiding structure according to claim 5, characterized in that: The cross section of the sliding sleeve (4) is convex-shaped, and a circular hole (41) is provided in the middle thereof for assembling with the central shaft (2). The raised portion (42) of the sliding sleeve (4) is slidably embedded in the interior of the central sleeve (3), and the top surface of the base portion (43) of the sliding sleeve (4) abuts against the bottom surface of the central sleeve (3).

7. The cylindrical paper-plastic forming template sleeve positioning and guiding structure according to claim 6, characterized in that: There is a gap between the circular hole (41) at the position of the base portion (43) and the outer wall of the central axis (2) to form a correction gap (44), and one end of the balance pin (6) extends into the correction gap (44).

8. The cylindrical paper-plastic forming template sleeve positioning and guiding structure according to claim 1, characterized in that: A balancing sleeve (7) is provided at the center of the bottom surface of the base plate (8), and the balancing sleeve (7) is completely wrapped around the base portion at the bottom of the sliding sleeve (4). A groove (71) is provided at the bottom of the balancing sleeve (7) for limiting the upward and downward movement of the balancing pin (6) on the sliding sleeve (4).

9. The cylindrical paper-plastic forming template sleeve positioning and guiding structure according to claim 8, characterized in that: The number of the balancing pins (6) is four, and the four balancing pins (6) are located around the bottom of the sliding sleeve (4), wherein four grooves (71) adapted to the balancing pins (6) are provided around the bottom of the balancing sleeve (7).

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