TW202128389A - Moulding method and apparatus - Google Patents

Abstract

A compression moulding method and apparatus are described, wherein a dose of plastics is deposited on a bottom portion of a first lower half-mould where the dose is laterally contained by lateral containment means comprising at least three elongated elements projecting from the bottom and arranged along a circumference, afterwards the dose is compression-moulded between the first half-mould and one second upper half-mould, with the lateral containment means entering the bottom of the first half-mould, by a retractable sliding movement, such to allow compressing the dose

Description

Molding method and equipment

The present invention relates to a compression molding method and equipment, especially for molding a certain dose of plastic.

Specifically, but not exclusively, the present invention can be used to mold flat objects (e.g., disc-shaped) made of plastic that can be used as internal gaskets for caps (e.g., metal caps) for closing containers, Especially for objects with relatively small thickness and weight.

Patent Publication US 2004/130068 A1 discloses a compression mold in which a dose of plastic is first deposited on a support at a distance from the bottom of the female mold half. The support is composed of three pins defining the three base points of the dose. Formation, and then, with the help of the fact that the pin slides and sinks through the inside of the bottom, the dose of plastic is released on the bottom of the female mold half immediately before the compression starts or when the compression starts.

Each of the patent publication EP 2 889 116 A1, US 2010/084788 A1, and US 2011/018166 A1 discloses the preamble of claim 1.

The problem with the prior art related to compression molding of at least one dose of plastic is that it is difficult to ensure that the dose is accurately and correctly positioned in the mold before the dose is compressed, and at the same time, relatively high productivity can be obtained.

The objective of the present invention is to provide a method and/or device that can solve the aforementioned problems of the prior art.

The goal is to provide an alternative solution to the problem of depositing a dose of plastic in a compression mold.

The goal is to allow a dose of plastic to be deposited in a compression mold quickly and accurately.

The advantage is that a dose of plastic is deposited in the desired location in a reliable and conventional manner.

The advantage is to manufacture a device with easy and simple structure for compression molding plastic.

The advantage is that it allows simple and safe transfer of the molded product from the mold, wherein the compression is performed toward one or more areas in which the product can be further processed.

The advantage is to ensure the easy handling of the molded object. After the compression mold is opened, the molded object can be held and moved by one of the mold halves forming the mold itself.

The advantage is to ensure that the molded product can be transferred out of the compression mold even in the case of particularly light products and/or in the case of relatively small thicknesses.

Such goals and advantages and other goals and advantages are obtained by methods and/or devices according to one or more of the scope of patent applications reported below.

In one example, a molding method includes the following steps: depositing at least one dose of plastic on the bottom part of the first half of the mold, wherein the dose deposited on the bottom part is laterally directed by the lateral enclosing member protruding from the bottom Ground containment, and the amount of the modulus between the first mold half and the second mold half, wherein the lateral containment member moves into the bottom of the first mold half, for example by retractable sliding movement, so as to allow the compression of the dose.

When the lateral containment member is in its protruding position protruding from the bottom of the first mold half, the lateral containment member can be configured to operate the stop member, which is deposited on the first mold half when the dose is The movement of the dose on the bottom caused by the inertial force applied to the dose is prevented when it is on the bottom. In detail, such movement may have at least one movement component in a direction parallel to the bottom of the first mold half. In detail, such inertial force may include the centrifugal force caused by the rotational movement of the dose when the dose is deposited on the bottom of the first mold half.

With reference to the drawings, the compression molding equipment especially suitable for molding a certain dose of plastic is indicated by 1 as a whole. The molding apparatus 1 can be used in particular to mold flat objects (having Relatively small thickness and/or particularly light).

In detail, the molding apparatus 1 may include at least one compression mold having at least one first mold half 2 and at least one second mold half 3, the mold halves cooperating therebetween to define a compression mold Prepare at least one dose of D plastic shaped cavity. In detail, the first mold half 2 and the second mold half 3 may include a lower mold half and an upper mold half, respectively. In detail, the first mold half 2 and the second mold half 3 may respectively include at least one die and one punch cooperating therebetween.

In detail, the molding apparatus 1 may include a deposition member for depositing at least one dose of plastic in the first mold half 2 so that later in the closed mold configuration (see FIG. 5), it is defined in the first half of the mold. A dose is compressed in the forming cavity between the mold half 2 and the second mold half 3. In detail, the member used for deposition may include a member used to extrude plastic, such as an extrusion nozzle, with a separate member configured to separate a certain dose of plastic from the plastic extruder flow (such as regular opening and Close the movable element of the extrusion nozzle). The member used for deposition may include, for example, an extruded member of a known type and/or a separate member of a known type.

In detail (see Figure 10), the member used for deposition may include an inserted rotating material rack A that can rotate around a vertical rotation axis and includes a plurality of pick-up devices (arranged at angularly spaced apart from each other) Inserted on the rotating material rack A, and where the circumferential track is schematically indicated by a in the figure), each of the pickup devices picks up a dose of material from the extrusion member to leave it to the compression molding member later . In detail, the compression molding member may include a molding rotary rack B that can rotate about a vertical rotation axis and includes a plurality of molding devices 1 (arranged at an angle spaced apart from each other in the molding On the rotating rack, and where the circumferential track is schematically indicated by b in the figure), each of the molding equipment includes a first half mold 2 and a second half mold 3. The pick-up device inserted into the rotary rack A is configured to release a certain dose of plastic and insert it into the molding equipment 1 of the molded rotary rack B.

In detail, each molding device 1 may include a lateral containment member 4 configured to adopt at least one protruding position (see Figures 2, 4 and 6) and at least one recess Position (see Figure 5), in the protruding position, the lateral containment member protrudes beyond the bottom 5 of the first half mold 2 to delimit the bottom portion, in the recessed position, the lateral containment member The bottom 5 is entered in order to allow compression of the dose D on the bottom 5, which delimits a cavity in the lower part. In detail, the lateral containment member 4 can be configured to adopt at least one protruding position, in which the lateral containment member protrudes beyond the bottom 5 of the first half mold 2 and is located inside A distance from the peripheral edge of the bottom 5 itself, where this distance is considered in the direction transverse to the direction in which the lateral enclosing member 4 protrudes. In detail, in the protruding position, the lateral containment member 4 can be far away from the center of the bottom. In detail, in the protruding position, the lateral containment member 4 can be far away from the periphery of the bottom. In detail, in the protruding position, the lateral containment member 4 can be exposed to a certain height from both the central bottom part and the peripheral bottom part. In the protruding position where the lateral containment member protrudes from the bottom 5, the lateral containment member 4 is arranged above the bottom 5 itself (inside the bottom).

In detail, the lateral containment member 4 may include at least one, or two, or more than one extending along the longitudinal direction (parallel to the mold axis and/or the direction of opening and closing the mold halves, as in this example) Two slender elements. In detail, the elongated elements may be spaced apart from each other in order to delimit the bottom portion where the dose D is deposited. In detail, the elongated elements may be parallel between them. In detail (see Figure 2), considering the direction transverse to the longitudinal direction of the elongated element, the maximum size of the dose D deposited by the member for deposition can be lower than the minimum distance between the elongated elements, so that the deposition is The dose on the bottom part is arranged between the elongated elements. In detail, in other examples (see FIG. 11), considering in the direction transverse to the longitudinal direction of the elongated element, the maximum size of the dose D deposited by the member for deposition can be higher than between the two elongated elements The minimum distance of, so that the dose deposited on the bottom part and possibly pushed to move on the bottom due to inertial force is stopped by the two elongated elements.

The elongated elements can be arranged on the bottom 5 so that when the elongated elements are in the protruding position, at least one or at least both of the elongated elements can act as a member for preventing the movement of the dose D, once the dose is deposited on the bottom 5, it can be subjected to inertial forces that tend to move the dose according to the direction of movement at least partially parallel to the bottom 5.

In detail, the lateral containment member 4 may include at least three elongated elements (parallel to each other) arranged along the circumference (as in the example of FIGS. 1A to 1E), whereby the dose D deposited on the bottom portion Can be surrounded by a collection of elongated elements. In detail, the lateral enclosing member 4 may include elongated elements that are equiangularly spaced apart from each other.

In detail, in other examples, the lateral containment member 4 may include only two elongated elements, or four or more elongated elements, for example along a diameter having a diameter higher than the dose D The circumferential configuration allows the dose D to be deposited on the bottom of the shaped cavity and is laterally enclosed by the elongated element.

In detail (see Figure 11), the lateral containment member 4 may include at least one or at least two elongated elements (for example, parallel between them), which are off-center or not with respect to the axis of the compression mold. It is arranged in a symmetrical manner so as to form a lateral abutment or stop member that resists the movement of the dose D inside the forming cavity.

In particular, such movement can be produced by a combination of forces generated on the dose (for example, due to the dynamics and kinematics of the various devices interacting with the dose).

Among these forces, the centrifugal force generated by the rotating rack for conveying or inserting doses can be mentioned in a non-limiting manner, and/or the dose is transferred from the rotating rack for conveying or inserting to the molded rotating rack The force with which the cavity is formed, and/or the adhesive force exerted by the dose on all surfaces in contact with it, and/or the centrifugal force generated by the molded rotating rack, and/or the elastic force accumulated by the dose, etc. Wait.

The combination of one or more of these forces and/or other possible abilities will produce at least one main direction of movement on the dose, which will be hindered by the lateral contrast or lateral stop member, as seen, the side The counter or side stop member may comprise (in detail) at least one or at least two elongated elements. The lateral contrast or stop member is configured to prevent movement of the dose D due to the combination of forces acting on the dose D, especially on the bottom 5 (ie in a direction substantially parallel to the bottom 5) .

Referring to the example of FIG. 11, the lateral containment member 4 includes two elongated elements, which are arranged at a certain angular distance from each other (the apex of the corner may be the geometric center of the forming cavity), and the angular distance is lower than 180°, or less than 90°, or less than 60°.

In this case, the elongated element laterally prevents the dose D positioned on the bottom 5 by inserting the rotating material rack A by the force F generated by acting on the dose D, so that the elongated element is arranged on the bottom 5 of the shaped cavity, For example, the direction of the force F generated is off-center to prevent the movement of the dose D on the bottom 5, as in a specific example, the movement may include at least a radial component and at least a tangential component. In detail, two elongated elements can be arranged side by side on the bottom 5 of the molding cavity of the moulded rotating pallet B to form an obliquely arranged barrier which resists the dose D having at least a radial component and at least a tangential component.之mobile.

In these specific examples, the lateral containment member 4 comprises an elongated element in the form of a pin or rod. In detail, in other examples, not shown in the figure, the lateral containment member may include a shape other than a pin (for example, the shape of a flat plate, or the shape of a circular section, or a number of pairs joined at an angle. Wall, etc.) one, or two, or three or more elongated elements.

As in the specific example described herein, the lateral enclosing member 4 can be set to move retractably inside the bottom 5 of the first mold half 2, especially by being disposed on the bottom 5 of the first mold half 2 Axial sliding inside the sliding hole.

In detail, the lateral enclosing member 4 may be supported by a supporting element 6 which slides axially and is arranged under the bottom 5 of the first half mold 2 delimiting the compression molding cavity in the lower part.

In detail, the lateral enclosing member 4 can be fixed to the annular portion 7 of the first mold half 2, which surrounds the bottom 5 of the first mold half 2 and can be parallel to the first mold half 2 and the second half mold. The mold 3 slides axially in the direction of the opening and closing directions of the mold formed by the mold 3. As in this example, the annular portion 7 can be fixed to the supporting element 6 of the lateral containment member 4. During the step of closing the mold (see Figures 4 and 5), the sliding ring portion 7 of the first mold half 2 contacts and interacts with the ring portion 8 of the second mold half 3, whereby the sliding ring portion of the first mold half 2 The part 7 can slide downward relative to the bottom 5 of the first mold half 2 (refer to Figures 4 and 5), so that the lateral containment member 4 can sink the lateral containment member to the bottom 5 of the first mold 2 Thereby, it penetrates the bottom 5 itself and leaves the shaped cavity for the retractable movement of the freely compressed dose D.

In detail, the first mold half 2 may include an elastic member 9 (for example, disposed between the sliding ring portion 7 and the supporting portion 10 of the first mold half 2), the elastic member is configured to resist the retractable movement. The force is the force that tends to move the lateral enclosing member 4 toward the protruding position (in this case, upward).

The plastic member for depositing the dose D is configured to deposit the dose D on the bottom part (see FIG. 2 or FIG. 11), so that the dose D deposited on the bottom part is laterally enclosed by the lateral containment member 4 Block and therefore hold in the desired position.

In detail, the lateral containment member 4 can be configured to be convex when the deposition member deposits the dose D on the bottom portion so that the dose D deposited on the bottom portion is laterally contained by the lateral containment member 4 When the dose D is compressed, a recessed position is adopted.

In detail, the lateral containment member 4 may include two elongated elements, which are arranged side by side at a distance lower than the lateral dimension of the dose D to form a resisting force F (as described above, it may act on the dose D The force generated by the larger force) is applied to the dose D and tends to move the dose D on the bottom 5. In the specific example (Figure 11) where the rotating material holder A is inserted to transfer the dose D to the moulded rotating material holder B (Figure 11), two elongated elements are arranged to rotate relative to the circular trajectory of the rotating material holders A and B and relative to the moulding The radial direction of the material rack B is off-center.

In detail, the forming cavity can be set such that the molded product G (see FIGS. 7-9) includes at least one undercut surface 11, where the “undercut” is intended to refer to the mold opening and/or closing direction. In detail, the undercut surface 11 may be engaged with at least one counter-surface of the second half-mold 3. In detail, the molded product G may include at least one lateral projection and/or at least one lateral depression of the undercut surface 11, and the at least one lateral projection and/or at least one lateral depression is formed by the second half At least one corresponding depression and/or at least one corresponding protrusion of the mold 3 is formed.

In detail, the undercut surface 11 may be configured so that when the first mold half 2 and the second mold half 3 move away from each other in the mold opening direction, the molded product G remains engaged with the second mold half 3 (see Figure 7). In detail, the undercut surface 11 may be arranged on the peripheral edge of the molded product G.

In detail, the forming cavity can be set such that the molded product G includes a second surface that is opposite to the undercut surface 11 and is substantially symmetrical, where "symmetry" is intended to refer to a plane orthogonal to the mold opening and/or closing direction. In detail, the undercut surface 11 and the aforementioned second surface opposite to the undercut surface 11 may include two tapered surfaces (for example, truncated cones) inclined in opposite directions.

In the specific example described herein, the lateral containment member 4 adopts a recessed position by means of axial sliding, in particular through a hole made in the bottom 5 of the first mold half. In other unexplained examples, it is possible to envisage a lateral containment member that can adopt a recessed position and/or can adopt a retractable recessed position by other types of movement (such as rotation or a combined movement of translation and rotation), For example, it can be retracted to the lateral containment member in the shell on the bottom of the shaped cavity.

The molding apparatus 1 can implement a compression molding method by its operation. In detail, the compression molding method may include the following steps: Position the lateral containment member 4 in a protruding position (FIG. 6), where the lateral The enclosing member 4 protrudes from the bottom 5 of the first mold half 2 so as to delimit a part of the bottom of the first mold half 2.

In detail, the compression molding method may include the following steps: when the lateral containment member 4 is in the protruding position (FIG. 2 or FIG. 11), at least one dose D of plastic is deposited on the aforementioned bottom part so that it is deposited on The dose D on the bottom part is laterally blocked by the lateral blocking member 4 and held on the bottom part.

In detail, the dose D deposited on the aforementioned bottom portion can be arranged inside the delimited space (arranged between or surrounded by the elongated elements) by the lateral enclosing member 4, and/or the dose D can be arranged by The lateral enclosing member 4 serving as a stop member stops laterally.

In detail, the compression molding method may include the following steps after the step of depositing the dose D on the bottom 5: positioning the lateral containment member 4 in the recessed position, wherein the lateral containment member 4 enters the first half The bottom 5 of the mold to allow compression of the dose. Figure 4 shows the annular part 7 of the first mould half 2 which is in contact with and interacts with the annular part 8 of the second mould half 3. ) It can be retracted and moved.

In detail, the compression molding method may include the following steps: in the forming cavity defined between the first half-mold 2 and the second half-mold 3, the mold agent amount D (FIG. 5), to obtain a molded product G, The lateral enclosing member 4 is in a recessed position.

When the first mold half 2 and the second mold half 3 are in the closed position (Figure 5) (where the dose D is compressed in the forming cavity to form a molded product G), the lateral containment member 4 is in a recessed position, Thereby, in general, the upper end of the lateral containment member 4 is very close to the bottom surface 5 of the first half-mold 2, that is, it abuts the lower surface of the forming cavity, so as to provide continuity on the bottom 5 without adversely interfering Shaped.

In detail, the compression molding method may include the following steps after the step of molding: opening the mold (Figure 6 related to the first half mold 2 and Figure 7 related to the second half mold 3), that is, when the mold is opened The first mold half 2 and the second mold half 3 are moved away from each other in the direction. In detail, it is possible by virtue of the fact that the molded product G includes an undercut surface 11 that engages with the opposing surface of the second mold half 3, so that the molded product G remains coupled to the second mold half during the step of moving away 3 (Figure 7). As mentioned above, the undercut surface 11 can be arranged on the peripheral edge of the molded product G, and even other positions are possible.

In detail, the compression molding method may include the following steps after the step of opening the mold or moving the mold halves 2 and 3 away from each other: the molded product G is separated from the second The mold half 3 is removed.

In detail, this type of separation force can be generated by the relative movement between the two parts of the second mold half 3 (especially the annular part 8 and the central part 12 (see the passage from Figures 7 to 8)). Specifically, the central portion 12 may include a punch portion having a surface transverse to the mold axis and compressing the material during the molding step. In practice, in a specific example, the aforementioned relative movement is performed by the downward movement of the central portion 12.

In detail, this type of separation force can additionally or alternatively be used to self-align the fluid of the molded product G, such as a compressed air jet, by the aforementioned relative movement between the annular portion 8 and the central portion 12 of the second mold half 3 A fluid jet is generated. The compressed air jet passes through a circuit configured in the second mold half 3 and ends at an outlet member configured on the wall of the second mold half 3. When the mold is closed, the outlet member is fixed Circle forming a cavity. In detail, such an outlet member may further have the function of a vent forming a cavity.

In detail, such an outlet and/or vent member may include at least one gap (annular) formed on the outer surface of the central portion 12 or the punch portion (for example, the gap between the central portion 12 and the annular portion 8) . In detail, such an outlet and/or vent gap may have a size equal to or less than 0.02 mm.

As described above, the molded product G may include a second surface that is opposite and similar to the undercut surface 11. In detail, the undercut surface 11 and the second opposing surface may include two tapered surfaces inclined in opposite directions ( For example, truncated cone) (see, for example, Figure 9), in order to provide a certain overall symmetry feature of the molded product G. The two tapered surfaces may be convex, such as in the example of FIG. 9.

Figure 10 shows six different examples of molded product G that can be made, where from the top of Figure 10 downwards, the peripheral edge of the molded product G includes: (i) a series of alternating ridges and depressions, such as serrations Shaped or knurled, (ii) annular recesses with symmetrical and curved edges, (iii) two convex truncated cone surfaces on non-planar but curved disc-shaped molded products, (iv) two concave truncated surfaces Cone surface, (v) the middle ring is convex, (vi) the middle ring is concave.

In detail, the molding equipment 1 may include a conveying device for conveying the molded product G from the compression mold to the following one or more operational areas. In detail (see FIGS. 12 and 13), the conveying device may include a first transfer rotating material rack 13, which rotates around a vertical rotation axis and picks up the molded product G released by the molding equipment 1 . In detail, the first transfer rotating material rack 13 may be provided with a first holding and suction member that holds the molded product G by suction pressure. In a specific example, the molded product G is released by the molding apparatus 1 in a downward direction from above, and the first suction holding member generates suction pressure on the lower side of the molded product G. In detail, the first suction holding member may include at least one body 14 having at least partly connected to the vacuum generating member by means of a fluid circuit at least partially inside the first transfer carousel 13 to be molded during placement A plurality of orifices or holes (arranged angularly and spaced apart on the first transfer rotating material rack 13) generating suction pressure on the plane of the product G (released by the molding device 1). In detail, the orifices or holes on the body 14 may be arranged to communicate with the vacuum generating member, each time being limited to the angular section of interest.

In detail, the conveying device may include a second transfer rotating material rack 15 that rotates around a vertical rotation axis and picks up the molded product G released by the first transfer rotating material rack 13. In detail, the second transfer rotating material rack 15 may be provided with a second holding and suction member that holds the molded product G by suction pressure. In a specific example, the molded product G is released by the first transfer rotating rack 13 in an upward direction from the bottom, and the second suction and holding member generates suction pressure on the upper side of the molded product G. In detail, the second suction holding member may be configured to hold the molded product G from above (ie, on its upper side). In detail, the second suction holding member includes a body 16 having a vacuum generating member connected to a vacuum generating member by a fluid circuit at least partly inside the transfer carousel 15 to generate a suction pressure on the upper side of the molded product G A plurality of orifices or holes (arranged angularly and spaced apart on the second transfer rotating material rack 15). In detail, the orifices or holes on the body 16 can be placed in communication with the vacuum generating member, each time being limited to the angular section of interest.

In detail, the conveying device may include a suction conveyor 17 (for example, linear) that picks up the molded product G from the second transfer rotating material rack 15. In a specific example, the molded product G is released by the second transfer rotary rack 15 in a downward direction from above, and the suction conveyor 17 generates suction pressure on the lower side of the molded product G. The conveyor 17 may include, for example, a suction conveyor belt that generates suction pressure on the lower side of the molded product G.

1: Compression molding equipment 2: The first half mold 3: The second half mold 4: Lateral containment member 5: bottom 6: Supporting element 7: Ring part 8: Ring part 9: Elastic member 10: Support part 11: Undercut surface 12: Central part 13: Transfer the rotating rack 14: body 15: The second transfer rotating rack 16: body 17: Conveyor A: Insert the rotating rack B: Molded rotating rack D: Dose of plastic F: Force generated G: Molded product

The present invention will be better understood and implemented by referring to the attached drawings showing some non-limiting specific examples. In the drawings: [FIG. 1A] to [FIG. 1E] are five sections showing the five steps of the compression molding method according to the present invention in sequence; [Figure 2] Shows the enlarged detail of Figure 1A, showing a part of the lower half of the compression mold; [Figure 3] Shows the enlarged detail of Figure 1A, showing a part of the upper half of the compression mold; [Figure 4] An enlarged detail of Figure 1C showing the compression-formed area including the dose; [Fig. 5] An enlarged detail of Fig. 1C showing the compression-formed area including the dose; [Figure 6] Shows the enlarged detail of Figure 1D, showing a part of the lower half of the compression mold; [Figure 7] Shows the enlarged detail of Figure 1D, showing a part of the upper half of the compression mold; [Figure 8] Shows the enlarged detail of Figure 1E, showing a part of the upper half of the compression mold; [Fig. 9] Shows the molded product obtained by the compression molding method of Fig. 1A to Fig. 1E; [FIG. 10] Shows some examples of molded products that can be obtained by the compression molding method according to the present invention; [FIG. 11] is a schematic top plan view of the molding equipment with inserting the rotating material rack, which inserts the dose into the molding rotating material rack including the molding equipment of FIG. 1A to FIG. 1E; [Figure 12] is a partial cross-sectional vertical elevational side view of the conveying device that transfers the molded products from the molding rotating rack of Fig. 11 to the area where the molded products can be further processed; [Fig. 13] is a top plan view of the conveying device of Fig. 12.

2: The first half mold

4: Lateral containment member

5: bottom

6: Supporting element

7: Ring part

9: Elastic member

10: Support part

D: Dose of plastic

Claims (20)

A compression molding method, which includes the following steps: Providing a compression mold including at least one first mold half (2) and at least one second mold half (3); Positioning the lateral enclosing member (4) at a protruding position, in which the lateral enclosing member protrudes from a bottom (5) of the first half-mold (2); At least one dose (D) of plastic is deposited on the bottom (5), wherein the lateral blocking member (4) is in a protruding position, so that the dose (D) deposited on the bottom (5) is at least Partially enclosed laterally by the lateral enclosing member (4); Molding the dose (D) in a shaped cavity between the first half-mold (2) and the second half-mold (3) to obtain a molded product (G); It is characterized in that, after the deposition step, it includes the following steps: positioning the lateral containment member (4) in a recessed position, in which the lateral containment member enters the first half-mold (2) The bottom part (5) of) is to allow compression of the dose (D), and the step of molding the dose (D) is performed with the lateral blocking member (4) in the recessed position. Such as the compression molding method of claim 1, wherein the lateral enclosing member (4) comprises a plurality of elongated elements spaced apart from each other extending in a longitudinal direction. The compression molding method of claim 1, wherein the lateral containment member (4) prevents one of the doses (D) from moving in the protruding position, and tends to move the dose (D) on the bottom (5) ) A force acts on the dose. Such as the compression molding method of claim 3, wherein the lateral containment member (4) comprises at least two elongated elements that cooperate in the protruding position to prevent the dose (D) from being at least partially parallel The movement in one direction of the bottom (5). The compression molding method of claim 4, wherein the two elongated elements are arranged side by side with each other to form a barrier that resists the force that tends to move the dose (D) on the bottom (5). The compression molding method of claim 1, wherein the lateral containment member (4) includes at least three elongated elements arranged in a circumferential manner, so that the dose (D) deposited on the bottom (5) is Surrounded by elongated elements. Such as the compression molding method of claim 1, wherein the step of positioning the lateral enclosing member (4) in a recessed position includes sinking the lateral enclosing member (4) below the bottom (5) to penetrate Move through one of the bottom itself. Such as the compression molding method of claim 1, which includes a step of moving the first mold half and the second mold half (2 and 3) away from each other in a mold opening direction after the molding step, wherein During the step of moving away, the molded product (G) remains joined to the second mold half (3) because the molded product (G) contains at least one facing surface with the second mold half (3) At least one undercut surface (11) to be joined, wherein the "undercut" is intended to refer to the opening direction of the mold. Such as the compression molding method of claim 8, wherein the undercut surface (11) is arranged on a peripheral edge of the molded product (G). Such as the compression molding method of claim 8, which comprises after the step of moving away, the molded product (G) is removed from the second mold half ( 3) The step of removing, wherein the separating force is generated by a relative movement between an annular portion (8) and a central portion (12) of the second mold half (3) and/or by aligning the A fluid jet of one of the molded products (3) is generated. Such as the compression molding method of claim 8, wherein the molded product (G) includes a second surface that is opposite to the undercut surface (11) and is substantially symmetrical, wherein "symmetrical" means to refer to the opening direction of the mold. Intersect a plane. Such as the compression molding method of claim 11, wherein the undercut surface (11) and the second surface include two tapered surfaces inclined in opposite directions, such as truncated cones. Such as the compression molding method of claim 1, which includes the following steps after the step of molding the dose (D) to obtain a molded product (G): Transferring the molded product (G) from the compression mold to the first suction and conveying member (13), which generates a suction pressure on a lower side of the molded product (G); Transfer the molded product (G) from the first suction and conveyance member (13) to the second suction and conveyance member (15), which is on one of the upper sides of the molded product (G) Generate a suction pressure; and Transfer the molded product (G) from the second suction and conveyance member (15) to the third suction and conveyance member (17), which is on the lower side of the molded product (G) There is a suction pressure on it. A compression molding equipment (1), which includes: At least one first mold half (2) and at least one second mold half (3), which cooperate with each other to define a molding cavity for compression molding at least one dose (D) of plastic; A lateral containment member (4), which is configured to adopt at least one protruding position and at least one recessed position, in the at least one protruding position, the lateral containment member is removed from the first mold half (2) A bottom (5) protrudes, and in the at least one recessed position, the lateral containment member enters the bottom (5) to allow compression of the dose (D) on the bottom (5); A member for deposition, which is used to deposit at least one dose (D) of plastic on the bottom (5), so that the dose (D) is subsequently in the first mold half (2) and the second mold half (3) ) Is compressed in the forming cavity; The lateral containment member (4) is configured to adopt the protruding position when the member for deposition deposits the dose (D) on the bottom (5) so that it is deposited on the bottom (5) The dose (D) is laterally blocked by the lateral blocking member (4), and the recessed position is adopted when the dose (D) is compressed. Such as the compression molding equipment of claim 14, wherein the lateral enclosing member (4) includes a plurality of elongated elements spaced apart from each other extending in a longitudinal direction; in detail, the plurality of elongated elements include at least three The elongated circumferentially arranged elements, so that the dose (D) deposited on the bottom (5) is surrounded by the elongated elements. The compression molding apparatus of claim 15, wherein in consideration of a direction transverse to the longitudinal direction, a maximum dimension of the dose (D) deposited by the member for deposition is smaller than the one between the elongated elements The minimum distance is such that the dose (D) deposited on the bottom (5) is arranged between the elongated elements. The compression molding apparatus of claim 14, wherein the shaped cavity is configured such that the molded product (G) includes at least one undercut surface that engages with at least one opposing surface of the second mold half (3) (11), where the "undercut" is intended to refer to a mold opening direction, so that when the first mold half (2) and the second mold half (3) move away from each other in the mold opening direction, the molded product (G) Keep engaged with the second mold half (3); in detail, the undercut surface (11) is arranged on a peripheral edge of the molded product (G). Such as the compression molding equipment of claim 14, wherein the lateral containment member (4) is configured so as to be able to perform a retractable movement inside the bottom (5). Such as the compression molding apparatus of claim 14, wherein the lateral containment member (4) is configured to adopt axial sliding through one of one or more holes made in the bottom (5) Retracted position. Such as the compression molding equipment of claim 14, which is combined with a transmission device, and the transmission device includes: A first suction conveying member (13) that generates a suction pressure on one of the lower sides of the molded product (G) and is configured to receive the molded product (G) from the compression mold of the device; The second suction conveying member (15), which generates a suction pressure on one of the upper sides of the molded product (G) and is configured to receive the molded product (13) from the first suction conveying member (13) G); and A third suction and conveying member (17) that generates a suction pressure on the lower side of the molded product (G) and is configured to receive the molded product from the second suction and conveying member (15) (G).

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